Popular Mechanics 1927-06: Vol 47 Iss 6

Page 1

NE POPULAR MECHANICS MAGAZINE WRITTEN SO YOU CAN UNDERSTAND IT

Page 2

ae Do cut Wood - % or Metal } @ He Mr. Happy-Man Says— | @ Nati ‘ 4 ¥ $700, 66 fz spen These Saws Save You |} #8} =: Time, Lab M 7 ms: ime, Labor and Vioney | @§) :: z R mint “QNILVER STEEL’’—backed by ATKINS exacting | laboratory tests—tempered and proved to make every saw cut faster and longer—makes these ATKINS Mill Saws and Hack Saws save time, work and money forevery user. It will pay youtolearn why the ATKINS name on a saw means greater service and saving. No matter what you saw—wood, metal, bone, stone a | or any material — you'll find a better saw with d CNN the ATKINS name as insurance of quality and value. 2 Ask your Hardware Dealer or Mill Supply House, or send for folders on ATKINS SAWS for any use. ry E.C. ATKINS & CO. Est. 1857 426 S. Ills. St., Indianapolis, Ind. Leading Manufacturers of Highest Grade Saws for Every Use; Saw Tools, Saw ’ Specialties, Plastering Trowels, Machine Knives, Grinding Wheels and Files

Page 3

wer EES Ur a POPULAR MECHANICS ADVERTISING SECTION LearnTo Fly From Men Who Know | We have taught hundreds of students. doing commercial work at large salaries. mail and passenger, creating big demand for men. Learn to Fly by Sweeney System ' FOR AVIATION " MECHANICS Here’s the great business of the future. The National Air Transport alone has invested $700,000 on the Kansas City air route. They are spending $1000 a day to operate an over-night service to New York City. Ambitious men are wanted as pilots and ground mechanics. You can go into postal, government, or commercial work. Flyers are in demand, earning big money at fairs, taking up passengers, etc., $5 for a 10- minute flight 1s pretty fine pay! If You Want to Be a Pilot The student, if he wishes, goes into the air and qualifies as a pilot under safe and experienced pilots, with double controls for actual flying. You take all the actual flying necessary to make you a competent pilot. Now when you understand that two to seven hours is all the average man needs to learn expert flying you will appreciate what this ample experience in the air under skilled men will do for you. Aviation is no longer a mystery—no longer a hazard; no, it is a business growing greater and more important. This has been wonderfully demonstrated in the successful flights over the North Pole. 150 Acre Flying Field Hangar and Club House Instructors Thorough Construction Course SCHOOL of AVIATION 3806 SWEENEY BLDG, KANSAS CITY. Many are now New air rates, An Actual Photo of One of Our Training Planes— A SWALLOW «eon ad ng Box »* —— PA - Seas Ox we, Sweeney Students Are trained by DOING. Thorough ground school work, under skilled instructors in the construction and repair of planes, recovering wings, tuning motor, etc., learning everything about the mechanical work by actual practice. This fits you as an aviation mechanic. You can build your own plane and do anything required in aviation mechanics and construction and repairing when you have finished this work. You are thoroughly taught motors, etc., and work with thousands of dollars’ worth of new material, including all types of engines. Aviation is now playing in commercial activities. Progress is rapid More men are needed every day. You can qualify as a mechanic, or an engineer, or repair man, or builder; five men on the ground are needed for one man in the air. SEND NAME TODAY $)21i)0°iictitoica aviation mechanical course and photographs of planes and equipment actually used: also full information as to the commercial end of flying and opportunities for young men. No colored students accepted f= === =SEND THIS NOW* == === EMORY J. SWEENEY, President 3806 Sweeney Bidg., KANSAS CITY, MO. Please send me full information about your Aviation Course. Name Address Town

Page 4

JWEAA 943 Burinp Aa cilia Sica cena OE eae, : emeatienneenmen nsec ee The Graphi pyright,

Page 5

opular Mechanics Magazine REGISTERED iN U. &. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT JUNE, 1927 No. 6 Burros and Flivvers Compete Rushing Prospectors to the Maddest Wide-Open Mining Camp Seen in a Generation ‘O nineteen-year-old Nevada boys irted out one morning a few months to look for gold, found it at noon and ered home the desert in the | of the evening with samples that as- ed $78,000 to the ton. (hat started the wildest gold stampede i generation, founded little city light, and even brought about a bitter in the state legislature over a pro- il to revoke the anti-gambling laws establish Weepah, the new gold town, a roaring camp that would “Days of Forty- across a tidy mining lal anything seen in a ” show. he two boys who made the discovery, ink Horton, Jr., and Leonard Traynor, re working an old claim owned by the ther of Horton, and made their strike thin a few yards of an abandoned pros- ‘t shaft, where the father had dug in vain for gold. They had stopped work for lunch, but, while one prepared it, the picked over the ground, following a badge Suddenly he shout that brought his partner on the run, and both hole. gave a other boys scooped up handfuls of rich quartz, shot through with streaks of gold. Back at Tonopah, they prospectors, W twenty-seven away, showed their finds to old and } seasoned ho declared miles the supposed gold was only iron sulphide, the “fool's gold” of the pector, boy Ss pros Crestfallen, the of their of interested igi the rock the result that it was found to run nearly $80,000 to the ton worthless. out passer many whom was enou assayed, with reached the latter fig sy the time he the more they rured they ha than $4,000. had not good news, given away Fortunately discl losed and was | samples to friends, one rh to have bovs with the I

Page 6

882 POPULAR MECHANICS location of their claim, and they kept the information a secret until the elder Horton returned home to protect their interests. Later the two leased their ground to a syndicate which took $30,000,000 in divi- dends out of the Goldfield mines twenty years ago. When the rush to Weepah started, a typical tented mining town sprang up overnight. Its streets, to which the sage brush still clung, were thronged with bearded desert prospectors, many of whom had not met since the last rush a gener- ation ago, and with tourists and gold from nearly every state in the Patient burros, loaded with the meager equipment of the seasoned desert “rat,” brushed against flivvers that ferried their owners back and forth each day from the hotels of Tonopah, and costly touring cars that came, loaded with all the patent equipment an_ inspired salesman could sell. The center of attraction was a trench, ten feet long and four feet deep, on the discovery claim. Beside it, for days, al- ways under guard, rested thirteen sacks of ore, declared to contain between $50,000 and $100,000 in gold. Tonopah, coming out of the sleepy days that followed its decline, shared the glory of Weepah as a roaring mining camp again. Because of lack of accommoda- tions and supplies at the discovery claim, most of the prospectors and visitors lived in the older city. Gambling houses flour- ished again, while the legislature debated lifting the ban against them, and dozens seekers union. sporting-goods of mining companies were born overnig! V in hotel rooms and even in the street where miners met. At Weepah, out on the barren dese everything, even down to water, had to imported for sale in the canvas-and-boar shack stores. One thriving emporiu: posted a sign advertising water at $2 barrel, gasoline fifty cents a gallon, ha ; and eggs for eighty cents and “white mul: fifty cents a drink, chaser free.” Gold strikes seem to run in bunches, { hardly had the news of the Horton-Tra nor find been flashed to the world tha discoveries were broadcast from Drippi: Springs, Ariz.; Angels, Calaveras count Calif., in the district made famous by Ma Twain and Bret Harte, and from the Sil ~~ Peak mountains of Nevada. The last fi made by Frank Horton’s ol brother Fred and a Chicago youth, w! they were touring across country in a bat = tered small car. Across the Continental Divide ir: Weepah, at Delnorte, Colo., another ¢ ‘ discovery is waiting for spring to remo the deep snow so that work can be sumed. There, a pair of Denver men, w! leased the old Little Annie mine, fi opened back in 1871, made a strike t! turned out as much as $16,032 from a 25 pound sack of ore. Another old mine is being worked agai: after being abandoned for years with reopening of the Loraine shaft, 22 mil west of Blythe, Calif. The new vein yielded ore which has assayed as high $1,400 to the ton. Meter S was Peco tehea sear a th a ae ee Burros, Known in the West, Because of Their Braying Sing Song, as ‘“‘Rocky Mountain Canaries,” Are Still the Mainstay of the Veteran Desert Travelers and Prospectors

Page 7

POPULAR MECHANICS HERE THE OLD AND NEW MET AT GOLD STRIKE

~— io Frank Horton, Sr., Next to His Son, | and Frank Traynor, His Companion

in the Discovery

Boom-Day Prices Are Charged for Everything in the New Camp, For All Supplies Have to Be Freighted in from Tonopah; the Sign Indicates That Weepah Is Being Run as a Wide-Open Camp —

the Shoe Too Late to Stake a Claim. Shop in His Flivver

883

Desert Miner Panning Out the Gold and Carefully Saving the Precious Water to Be Used Again; a Rock ing Motion Carries the Lighter Stones and Earth Away and Leaves the Nuggets Behind in the Pan

Repairer Opens

The First Building in Wee- pah, < Thriving General Offered for Sale Store,

Page 8

884 POPULAR MECHANICS GIANT NET PROTECTS THE PENSTOCKS OF DAM Rigging the Steel Net to Catch Logs Before They Can Strike and Damage Penstocks of Dam near Tacoma Wash.; Meshes Are Six Inches Square In order to protect the penstocks at the Lake Cushman dam, recently completed near Tacoma, Wash., from waterlogged timbers, carried along beneath the surface of the water, an enormous steel net has been stretched across a short distance from the upstream face of the dam. It is woven of wire and steel cable, the meshes being six inches square. A strong cable, securely anchored on either side of the canyon, supports it. WEIGHT OF HAIR TELLS RACE EXPERIMENTS SHOW Scientists now can determine your race by weighing your hair, tests at the Univer- sity of Chicago have shown. Using ten strands, each of the same length, the in- vestigators found that the hair of Mongo- lians is heaviest, that of the Caucasians next and the Negroes’ is lightest, partly because of the large number of air bubbles it contains. Research also disclosed that a white woman’s hair attains an average length of twenty-five to thirty inches and that four years are required to achieve t! growth, as against twelve to sixteen incl for a white man’s hair. This difference not found among other races. Wome: hair, however, is lighter than the males’ EASILY DRIED SHAVING BRUSH HAS REMOVABLE BRISTLES Packing a damp shaving brush into t! traveling kit is said to be no longer nec« with a brush that has removal bristles. They can be spread widely apa for quick drying, or a new filler may inserted. This | feature adapts t! brush to barbe: usage and greater cleanlin: and comfort. T! handie is of met and the bristl: are attached to ferrule which m: quickly be taken out for spreading t! brush or changing the filler. sary

Page 9

rATIC FADES AS TRAIN SPEEDS RAILROAD RADIO SHOWS and radio-station ength increases with and in proportion icceleration in the train’s speed, exper- ents with a receiver on board a car of Northwestern railroad Static decreases have shown. Vhen traveling toward a station, the sig- ls are stronger than when going in the ther direction. Bluffs or other obstruc- ms tend to deflect or aid the signals of tions near by, according to their rela- e location, but do not appear to influ- nee the reception from distant trans- A steel bridge with no super- itters. tructure, helped to increase the volume the reception while one with a super- tructure decreased it. METAL CLARINET WON’T CRACK AND HAS GOOD TONE specially adapted for localities subject sharp changes in temperature and for iveling orchestras that encounter a wide nge of weather conditions, a metal clar- et has been introduced in America from rance. It is said to have the same tone ality, correct intonation, evenness and irrying power of the wood instrument nd the added advantage of being immune to cracking and checking. It is made with o tubes, the soldering and tone-hole lrawing operations being on the outside ing. When very cold, it may be quickly rmed up to the proper playing pitch. \ll-Metal Clarinet as Substitute for Wood; It Does Not Vary So Much under Changes of Weather POPULAR MECHANICS 885 Grip Strap on Top of Umbrella Can Be Slipped over Wrist, to Make Carrying Easy VANISHING STRAP ON UMBRELLA MAKES IT EASY TO CARRY Umbrellas are carried from the top in- stead of the grip handle by means of a disappearing an English inventor has patented. opening up strap This prevents the ribs from part when not by the catch at the bottom. secured The umbrella is but twenty-two inches long when closed, and, Way when open, the strap is hidden. INSECTS IN THE CLOUDS Hunting bugs with an airplane, half a mile above the ground and more, is one of the latest intent on keeping plant-destroying pests under control. methods of scientists who are Sticky paper traps are at- tached to the planes or to kite in order | to catch any insects that might be flying, and a “patrol” is made over an area where the bugs are believed to be traveling. Flies an adult corn maggot 1.000 to of two species and have been caught at altitudes of 3,000 feet Some of the insects were be- lieved never to travel at heights of than a few feet. more

Page 10

886 POPULAR MECHANICS RAISING ORNAMENTAL FISH AT UNIQUE COLLEGE Crossing a moonfish with a swordtail and getting an ornamental species whose like never swam before is only one inci- dent in the work at the world’s most unusual schools, the college of fish- eries at the university of Washington, at Seattle. It teaches not only how to fish and how to make fish ready for market, but also how to raise them; how to make one of Tank at the Fisheries School with Model Equipment Close View of the Incubating Vats, and, at the Left Studying the Fish Elevator them thrive better, and how to combat di eases. Batteries of hatching jars and gla tanks, chains of miniature hatching poo! rooms full of laboratory equipment, an complicated arrangements of model tra} seines, fishwheels and canning apparatu make up the equipment for instructio1 During the winter the students are en gaged in classroom and laboratory wor! while the spring and summer months se them afield, each working in some bran: of the fishing industry. Some go nort >

Page 11

POPULAR MECHANICS iska for the salmon run, where they in the canneries, at the traps, and Others cruise on the hali- sanks or work the oyster beds and ter pots on Puget sound, and even go e water. to the Columbia river for the annual run of smelt. Commercial which has spring farming, ed a point where OOO of trout was keted to hotels and .urants from fish ms in the state of hington alone last is being stimulated e distribution of bul- ns telling how to pre- and conduct farms. the newer industry of rais- ornamental fish, which is now begin ‘to thrive, is being guided with expert ce: and here the college gathers and eds rare specimens from all parts of the ld. The fish frequently are distributed rivate breeders as a part of the work ‘ncouraging the development of new Simi- | beautiful bizarre forms. Besides con- ting research among native species of mmercial marine forms, the college is y transplanting new forms. A huge panese oyster, which weighs a pound or ‘re and is almost as large as a beefsteak, been introduced and is now beginning thrive, according to reports. RADIO RECEIVER FOR THE BLIND HAS PINHEADS FOR NUMBERS lo enable blind persons to tune in dif- rent stations on the radio receiver, the numbers are Not a Toy, but a Serviceable Car ; the Midget Electric Auto TINY ELECTRIC ROADSTER RUNS THIRTY MILES ON CHARGE Weighing but 344 pounds, complete with storage batteries, a midget electric road ster for two persons has been designed for sport and utility as well. It saves us ing the large car on many occasions, 1s serviceable in large industrial plants and can be taken on outing trips where the ordinary automobile would not be prac- tical, as at the beach. A speed of ten to twelve miles an hour is obtained from two standard six-volt storage batteries. This rate may be several using a special sixteen-volt battery. miles by Un- | Singie charg the increased der favorable conditions, a ing of six-volt nverted into ed characters by cing pinheads in e proper arrange- nt to form the raille equivalents the usual This plan was sed by two nd men who und some diffi- in using the receiving sym ilty in dinary vive The car is equipped with batteries w il] thirty miles. a lock brake, is easy and the battery box may be to operate employed as a seat third when desired. for a person @ During 1926, more than 22,000,000 mo- tor vehicles were ; with standard quipment. Close View of the Raised Numbers on Radio Tuning Dial, and Blind Man Demonstrating Their Use registered in the United States

Page 12

By HAMILTON WRIGHT, JR. I] URTLING down a straightaway at nearly three and a half miles a minute, a thirty-year-old English war veteran re- cently covered the famous speed course at Daytona beach, on the Florida east coast, faster by far than man has ever moved on land. Riding in the biggest racer ever built— a car almost thirty feet long, six feet wide, and so packed with machinery, including two huge 500-horsepower engines, that there was only room for one small seat— Maj. H. O. D. Segrave set a mark of slightly better than 207 miles an hour with the wind and more than 200 miles an hour against it, for an average speed of 203.79. RRR In a time so brief that it was measur¢ in split seconds, he went so fast that spectator who blinked his eyes didn't se him go past, for his speed was about 30 feet a second. In four-tenths of a seco1 —the time it takes for the hand to act « a message from the brain—he travel: nearly 150 feet. At that speed, had t! front wheels of his car been twisted t degrees from their straight path, the rid: probably would have been dead before t hand could act, for the resistan: was so great that even that slight swet would have sent the car over the sands. sorn in Baltimore, Md., of English pat wind somersaultii

Page 13

thirty years ago, Maj. Segrave for teen years has worked, trained, slept, ten and talked with one thing in mind peed. When the dream came true at ytona beach, he was at the wheel of a that cost $100,000 to build, besides an- er fortune to bring it to America for trials, and that, in the words of its er, “has no practical use.” It is a ed creation, pure and simple. His record was made on the same stamp- ground where famous speed kings emonstrated new possibilities for swift ransmission many years - ago. Alec Vinton, in 1902, roared over this very me course for a mile in fifty-one seconds + Then came W. K. Vanderbilt, who egotiated it in thirty-nine seconds. Later he 3 by at GOT dine 42, ley ae Louis Roth of Boston made the mile in twenty-eight and three-fifths seconds in a Stanley steamer. Victor Demogoet, of Paris, made two miles in fifty-eight and four-fifths seconds in a Darracq. Bruce Brown, in 1911, made ten miles in a little over five minutes. All these records were capped by the three-mile-a-minute pace set by Sig Haugdahl, Norwegian speed king April 6, 1922. Maj. Segrave is a daring aviator with a splendid war record. Realizing the des- perate nature of his long-planned test, he brought with him seven of the finest me- chanics in all England and four experts from leading automobile concerns. Eaclr man had been trained to his capacity and knew just what to do to get the maximum 8s9

Page 14

890 POPULAR MECHANICS W. K. Vanderbilt at the Wheel of the Mercedes, in Which He Made a Mile in Thirty-Nine Seconds on Daytona Beach in 1902, When Auto Racing Was Confined to Wealthy Sportsmen speed from the “Mystery-S,” car was called. Each knew that a man’s life was at stake in this attempt. To withstand the peril as his of such speed, every nut and bolt, valve and spoke had to be super- perfect. Nothing could be taken for granted. There were ninety-six valves, twenty-four pistons, super crankshafts, vacuum brakes, wire wheels, every spoke of which must be perfect, and a_ thousand other important parts to look after, some of which had never before been seen in this country. These men vere the advance explorers into the new continent of speed which lay in a plane above that already ex- plored, There are perhaps no more than a hundred peo- ple, close students of rac- Ma ing, who really know what Maj. Seer was forced to overcome in accomplis|! this great feat. When the wheels rey: at a speed of 2,000 revol utions per minu one of the greatest difficulties to secur: perfect balance. Any tire is tremendously mz appearing to have perfe miles an hour may be t ance after passing 1001 inequality in ignified. A whe: -ct balance at fi hrown out of b niles an hour, set ting up vibrations in the car which m its maximum speed imp¢ wind resistance is reduc »ssible even thou -ed to a minimu At a 200-mile-per-hour speed, the ru ber must hold as true and not fluctuate even . Segrave at the Wheel of ‘“‘Mystery-S” and Giant on the Florida Beach as a steel whe: a fraction of inch. The cent: ugal force is great that tire rims and whe: have a tende1 to come off or to pieces. longer ist weight they be factor. It is strain of anotl force. To ke the tires onatsu a high speed, we crave was oblige to have nearly | pounds’ pressu Car Itself as It Appea:

Page 15

POPULAR MECHANICS JPWARD UFT CAUSED Y To WHEEL ENCLOSED iN CHASSIS FOR PROTECTION ACTUAL WIND RESIST. : 200 M.P.H. 920 POUNDS Fastest Thing That Ever Ran on Land, Maj. Segrave’s Giant 1,000-Horsepower Car; First Automobile Racer to Be Equipped with Two Engines and Perfect Streamlining They had to be very thin to heat resistance. It sometimes es weeks to balance a wheel perfectly. en traveling over 160 miles per hour in ordinary racing car, the resistance the air overcomes the traction of the wheels and they do not take good don the ground. This was, to a large tent, overcome in the “Mystery-S,” by great weight of the car and the partial losure of the wheels by the chassis. reover, the vacuum created in the rear the rushing car tends tu lift the back while it is conceivable that the wwnward pressure exerted by the wind n the nose might cause the car to somer- ult. The front and rear-end design of he “Mystery-S,” while not radically dif- rent from that of other racing cars, is re pronounced to meet these problems. Maj. Segrave has always been speed- izy. Nothing moves too fast for him. le talks fast, eats fast, thinks like light- ng and can’t sit still a minute. And yet knows his car better than its creator, uis H. Coatalen. If a valve, one in nety-six, wasn’t working right, as he isted to the beach pits, he’d tell the echanic just which one it was. “Suppose your car caught fire when tu were traveling about three miles a inute,” he was asked, “would you have riven it into the ocean as so many others ive done?” “I don’t know,” he laughed. “It takes e two miles to stop and if I ever hit the iter, even by accident, the impact would e tires. rcome heels, crumple us up as if I had struck a stone wall going sixty. It took about miles before she was wide open, two to set the record and two to stop. During that two-mile stretch, when I was going around 200, the wind was so terrific as it roared by my ears, that I feared I would been knocked unconscious, had I leaned beyond the protection of the built-in cowl. This pressure of the air when proceeding at a velocity of 200 miles per hour is equal three have to a weight of 112 pounds hanging from one’s nose. It took fully 500 horsepower, one-half the entire power of my car, to cut down wind resistance at that speed. “At 200 miles an hour the car has a great inclination to get up and fly. Had any strong gust of wind struck the car when I was going my fastest, I would have been turned over. It’s like an airplane hitting a hill. During the tests we made a few days previously, gusts of wind would strike the car at 150 miles an hour and it felt as though I had hit a bale of hay. cross wind of only eighteen miles made it extremely difficult to keep sliding inside.” The beach at Daytona is some twenty- seven miles long and about 500 feet wide at low tide. It is thesmoothest natural stretch of land in the world suitable for auto rac- ing and is much sought as a winter and summer resort. The sand is hard-packed. An ordinary touring car leaves only a hair- line mark when slowly moving over it. It is hard because of the fact that its great width has permitted the tide to continually Even a the car from

Page 16

892 POPULAR MECHANICS roll and grind the sand, reducing the grains in size and packing them tightly. The dangers encountered by Maj. Se- grave were confirmed by Sig Haugdahl, who on the same beach thrilled the world a few years ago. At a speed of 180 miles per hour, Sig said, the closest you can drive your car to a straight line is 100 feet. “The slightest move may throw you into the ocean on one hand or into the sand dunes on the other,” he said. “The front wheels, turning at 180 miles per hour, act like gyroscopes and won't turn quite enough with the steering gear to keep the car in a straight line. That is one of the dangers of driving fast. When you are going at this speed, the resistance of the air overcomes the traction of the rear wheels and they do not take hold on the ground. The currents of air on the beach move the car. You keep your foot on the throttle and pray to God.” Maj. Segrave came to Florida with a car well prepared to overcome these difficul- ties. “We built an exact model of the car in miniature and tested it out in a wind tunnel at Vickers’, in Weybridge, England, to see how it would act at 200-miles-per- hour wind resistance,” he said. “At 210 the wind resistance is figured at 1,020 pounds and at two hundred, 920 pounds. The model we built looked pretty good eee iemamnstrccttnreecstitte: tossssine tt OEE AS OSS: AGE TEASDALE IE, and I figured that, when the two engine were in, she’d hold the ground. But t! wind resistance was so intense that ove: half the power of my car, 500 horsepower was used to cut it down. “This machine was built to test theo ries,” continued Maj. Segrave. “The auto of the future will travel ninety or a hun- dred miles an hour. In America and in England, superhighways will be built to allow a very high speed. In England we have several great thoroughfares where you can step on the throttle and hold it down for almost an hour ata time. They have been especially built for speed Among the new devices and accessories that were placed upon the ‘Mystery-S’ fo: the test was a new type of tire which, be cause of its thinness to resist heat,. elin inates a great amount of wear that come from friction. The tires become so hot at high speeds that thin rubber at present is the only relief known. Centrifugal force stretches the tire fully an inch and a halt at 200 miles an hour. The rubber is on one-sixty-fourth inch in thickness. “We have new alloys in the engine to be tested. An alloy that will stand up under vibrations at such a speed will la on an ordinary car for nearly twenty year yr until it is obsolete. The spokes in the wheels embody a new design that we hope will prove much more satisfactory than present-day wire wheels. They are what is called a quadruple-spoke design on the rear wheels and a triple-spoke design o1 the front wheels. Flexibility is one 0! their biggest features. “The steering mechanism is another at rangement that will no doubt prove inte: esting to American manufacturers as soon as details of it are made known. One cai From a Standing Start, This Small American Racer Beat an Airplane over a Mile Course at Daytona; the Jump from the Start Gave the Automobile the Advantage

Page 17

POPULAR MECHANICS ney Oldfield Getting the Checkered Flag at the End of a Mile in His Famous “Blitzen Benz” at Daytona; Maj. Segrave Followed the Same Course in Making His World’s Record the car at 100 miles per hour with st a thought, and, no matter what ur the road might take, the front eels tend to hug the ridge or top.” he car cost well into $100,000. It is ctically useless for anything but ex- menting and breaking records. The engines eat up one and one-quarter lons of special fuel every mile. It can run on one or two engines. In actual practice, the rear engine is first started up by means of compressed air. The front engine has one, while the rear motor re- quires two radiators. There are four valves per cylinder and two spark plugs; also four magnetos for each engine, and all valves are operated by means of over- head cam shafts. ALARM-CLOCK MEMO PAD AIDS IN KEEPING APPOINTMENTS Besides reminding the business man or her worker of his appointments, a desk morandum device, introduced in France, eeps an accurate record of tasks per- rmed at any hour of the twenty-four, so it the report may be filed away for ref- ence. It has sev- il featur ot und in other ts of its kind. 1r instance, there keys at the le of the memo ink which may et for any hour of the day and, when e time is reached, the clockwork mech- m rings a bell. The record sheet is vided into spaces for appointments at tervals down to five minutes apart, and ere is another division for general no- itions, The reminder is especially adapted to process work, as in a factory where ex- perimental tasks are under way. The record sheets would give timely notice when certain things were to be done in a test, for instance, and they could be kept for later consultation. SANDWICH MAKING AN INDUSTRY THROUGHOUT UNITED STATES Sandwiches are now considered one of the leading industries in the United States, the total revenue from this popular form of food approaching that from motor cars and movies. From careful estimates, it is believed that at least 1,000,000 sandwiches are eaten every working day in the Broad- way restaurant district in New York alone. Figuring each one at a cost of twenty cents, a moderate amount, the daily reve- nue in this section of the city alone would be $200,000 or more than $70,000,000 a year. These figures are believed to be typical of many other parts of the country.

Page 18

894 POPULAR MECHANICS ARTIST TURNS WOOD BLOCKS INTO MASTERPIECES How Carl Hallstahammar Reveals Life in Wood; the Artist and Examples of His Work; the Groups Are Carved from Single Blocks, Not Fabricated; Color Is Applied to Emphasize. Features With three or four chisels, a saw, mallet and a few pieces of basswood or pine, you can be a wood sculptor if you have the talent. This last and most important item is likely to be overlooked on a first visit to the studio of Carl A Swedish craftsman, Hallstahammar, for his entire equip- ment is no more elaborate than that men- tioned above, and the ease with which he works makes the task appear extremely simple. He uses few drawings or outlines, developing the from the wood block. His studies are not built up from smaller units but are made entirely from a single piece. work directly Color is used to give expressions and costumes more realistic appearance. Through the medium of wood, the sculptor depicts his subjects many moods with the skill of the cartoo ist. The pieces have been accorded wi recognition in this country. He beg carving when he was twelve years old DIAMOND ONCE AN IDOL’S EYE BROUGHT TO AMERICA One of the world’s most famous preciot gems, the Nassak diamond, has been pu! chased by a New York jeweier. In 191} it was valued at $148,000 but just recent! it was appraised at $400,000 in view of tl increased price of the stones and its un usual history. Originally, the diamond | believed to have come from a temple abou

Page 19

POPULAR MECHANICS les fromthe present Bombay, where it een set in an image e god Siva as a ring eye. The stone iken from an Indian ‘and came into the ion of Warren ngs, who sold it to ast India company. ondon jeweler pur- ed it and subse- tly it was recut into er dimensions but shape by the then juis of Westminster, bought it in 1831. It been in the family tinuously since the hase by the marquis it was bought by the York dealer. It is to be the only large vhite diamond that ned by a jeweler. YOKE LINCOLN CUT PRIZED RELIC AT UNIVERSITY hat Abraham Lin- ns woodworking ac- ties were not confined tirely to splitting rails een in the sturdv ox Rounding One of the Seventeen Curves on the Garage Race Track; a Thrilling P Moment on the Outer Ramp ke he carved from k walnut and hickory and which is AUTO RACE ON GARAGE RAMPS one of the highly valued relics on dis- TESTS SMALL CARS at the university of Illinois. It was hioned about 1830, while Lincoln was Racing from the second basement to the ng at New Salem, Ill. His brother-in- seventh story of a Paris garage, on the 2 ~« . Clark M. Smith, bought it at an auc- outer ramps used to transport cars from sale and later one level toanother, ced it on exhibi- gave French drivers in his business ; a chance to test ce in Springfield = , their skill and the en Lincoln was a ti flexibility of their ted to the pres- — autos recently. The ney. He finally ; : course also had ided to give it to ‘ ~ curves which were ‘university. The 4 rounded at high ke is kept in a speed, showing the e of oak boards Nene efficiency of the m the floor of the i small car, as com- ncoln home in pared with larger ringfield, Carved by Lincoln and “Rescued” at an Auction Sale, ones. the Ox Yoke Now at the University of Illinois

Page 20

896 POPULAR Found under Wall Paper at French Inn, Fresco of Joan of Arc by the Late Paul Gauguin RARE MASTERPIECE IS FOUND HIDDEN ON BRICK WALL How a torn piece of wall paper led an American artist to discover a lost paint- ing by the late Paul Gauguin, is a romantic incident of recent happening. The artist had entered the little inn of Marie Henri in Brittany, not knowing that this was one of the favorite retreats where the great Gauguin often amused himself and com- panions by painting on the walls and ceil- ing when unfavorable weather prevented work outdoors. A tear in the wall cover- ing revealed a bit of color on the brick be- neath. The artist removed all the paper, exposing what proved to be a fresco of Joan of Arc, by Gauguin, and another painting by DeHan, a contemporary. They had been covered by layers of wall paper MECHANICS and lost for years. The nature of the find was explained to theamazed woman owner of the inn; she was paid for the paintings, and then came the work of their removyal. Parts of the wall on which the frescoes were made, were braced, carefully cut out and lowered to the floor. The backs were next reinforced with cement and steel and the paintings taken to Paris. The removal was considered remarkable, because no mortar was broken from the pictures dur- ing the process. They are to be exhibited in America soon. NON-SINKABLE SURFBOARD MADE OF METAL Weighing but thirty pounds and con- structed so that it cannot sink or capsize a surfboard of novel form has been intro duced in California. Its fish-pattern de sign affords a saddle and a chin rest { the rider and propulsion is obtained by hand-over-hand crawl stioke and fo movements. [For those who desire it set of paddles can be attached, althon; these have not been found practical rough water. Frame and breast board of duraluminum. ELECTRIC DRIVE FOR PUMPING EASILY INSTALLED Especially adapted for a home wate! works system, an electric drive can quickly attached to the pump, oper- atesindoors or out and, in emergen- cies, may be run with a gasoline engine or by hand. The stroke is ad- justable to fit wells of different depths and size of cylin- ders. Patented features are said to afford economy of electric current and ease of oper- ation. No founda- tion is required for the rig, which looy around the pump or well casing. Geat sprockets and chain run in an oil-tigh dust-proof box, making lubrication eas) ' rr,

Page 21

POPULAR MECHANICS eam r SMOKE BOMBS IN AUTO TUNNEL TEST VENTILATION The efficiency of the ventilating system the Holland vehicle tunnel under the [udson river was graphically illustrated ‘ently when smoke bombs that gave off mes, equivalent to those from hundreds automobiles or a good-sized fire, were hted in the passage. The smudge failed spread more than fifty feet in any direc- mn and within two the Circulation in the Holland Tunnel with Smoke Bombs; Note How the Smudge Is Being awn to the Ceiling; It Failed to Spread More than Fifty Feet in Any Direction twenty-five-horsepower motors and run according to traffic conditions. are SAIL LIZARD ROAMED AMERICA MILLIONS OF YEARS AGO Discovery of and _ skeletons is helping scientists to recon struct a picture of the world as it prol ° °4 TOSSIIS constantly mov ably was long ages ago. Recently, a part from the University of Chicago found skeleton of nutes after the ymbs were usted, the tunnel practically clear Te the last trace of oke. Circulation effected by batter- of fans, eighty- sur in all, half t which blow pure r into the tunnel hile the rest draw ut the used air. gases and lizard in rocks w specimen-hunting in Texas. The dis- covery enabled scholars to correct a minor point, for theskeleton showed that the lizard had a long tail instead short had been supposed. It is have of a one as thought to lived on this The fans - Reconstructed from Fossil re operated by econstructe ° ossi Remains Found in Texas; the Sail Lizard As It Probably- Appeared continent some 20.000.000 vears avo.

Page 22

898 POPULAR MECHANICS SPIRIT OF ANCIENT CHINA STILL CLINGS TO Chinese Fortune Tellers Have Been Working Overtime during the Recent Warfare, for They Are Highly Honored Citizens, and Always Be- lieved; Above Is One of Them, Reading the Fate of an Ancient Patriarchal Fakir, While the Neighbors Look On Chinese Students in a Christian Missionary Workshop Weaving a Rug; Carpet Making Is One of the Chief Industries, and Fine Examples Command Big Prices Chinese Soldiers and Their Equipment; the Umbrellas, at Right, Resemble the Huge Shields Worn by Knights of the Middle Ages Top and Center © D. C. Thompson; Lower Photos, Courtesy Illustrated London News

Page 23

899 POPULAR MECHANICS O.DIERS WHO CARRY UMBRELLAS TO WAR The “White Train of the Whites” Which Carries Foreigners from Tientsin to Pekin under the Pro- n of the Festooned Flags of the Allies; Despite Warning White Paint It Is Often Fired Upon The Chinese God of Destiny, Above, Seems a Fitting Leader for & the Warring Fac- : tions; Below Is a — Red-Cross Dressing Station of the Army | cee Which Recently Lost ——_ ee Shanghai to the Can- tonese Reds oD Thompson

Page 24

900 POPULAR MECHANICS FISHES’ SECRET SOUGHT TO ADD SPEED TO BOATS Above, German “Fish Boat,” Showing the “Gills” through Which It Sucks Water; at Top, Left, the Boat Being Launched in a Wheeled Cradle, and, Below, as It Appears When under Way Hunting for an explanation why some fast-swimming fish had more gills than their slower brothers, A. Boerner, of a German inventor, Dresden, has evolved a new type of boat that breathes water and First tests showed that his boat, the “Forelle,” which is German for trout, developed extraor- dinary speed in proportion to its size and power. It is about thirty feet in length, and driven by a six-horsepower engine. Boerner decided that the accepted idea that a fish propelled itself by means of its tail fin, was not entirely correct, after in- vestigating fast sharks that had as many as five gills, whereas slower-moving fish got along with two. His theory is that the fish take in through the mouth, then compress the gill bags, to get pressure, and eject the water backward through the gills, with the result that it covers the body with a thin sheath of water and eliminates even has scales along its sides. water the “skin friction” which holds boats ba The fish’s scales, he says, act to break | whirls in the water, since any current tt ing to move forward raises the scales, j1 as the hand does when brushed from fish’s tail toward its head, and so the c rent is converted into a propulsive tor To supplement the film of water, the f also exudes an oily scum which covers body. To test his theories. Boerner bi the “Forelle.” Beneath the water li at the bow, the boat has two large o tubes, one on either side of the stem in each tube is a turbine wheel, geared the engine. The water sucked in throu the turbine is expelled through rows small nozzles along the sides and bott of the hull, while scalelike embossings the hull surface break up whirls and c vert their action into forward power. | nozzles are so placed as to envelop the | in a film of water, cutting down the res!

Page 25

POPULAR MECHANICS 901 e of the water. Steering is taken care v reducing the flow of water from the ‘les on the side toward which it is de- d to turn. STAMPS PRINTED BY THE MILE [In Franklin’s day, letters were sent and irged for by the sheet and the distance vy were carried. Ten cents was the rate one sheet, twenty for two, and so on. r every fifty miles, an additional charge made. There were no envelopes, the eets just being folded and mailed. To- there are so many letters that stamps e literally printed by the mile. 1,500,000 letters are mailed each hour of twenty-four in a day. To carry the ear’s letters. 15,000,000.000 postage stamps nd 60,000,000 special-delivery stamps are ld. More than 1,500,000,000 postal cards re used yearly. The government 10.000 railway postal clerks who cover 0,000 miles daily in handling the mails. Some has RUBBER KNEADED LIKE DOUGH MOLDED INTO DOLLS Kneadable rubber that can be fashioned to many objects, such as dolls, decora- ms, masks and other things, has been leveloped by German chemists. It is colored so that figures can be imitated in a realistic manner and the substance clings together firmly so that almost any posture can be reproduced, depending up- on the skill of the modeler. Boxing Dolls Modeled from Rubber “Dough”; the Substance Clings Together Firmly STREET LAMPS TESTED TO SHOW IF LIGHT IS WASTED Testing Street Globes to Determine Their Effciency; Amount of Light They Pass Is Accurately Gauged Certain kinds of colored-glass globes on street lamps restrict more than half of the light, while other types are almost as in- efficient, according to interesting test made under the direction of Prof. L. T. Clark, at the University of Southern Cali fornia. To find out how a lamp 1s ° ing,” a study is first made to determine if the rays are being projected in a direction that will not serve the public, or if the light is properly shed to give the street the best possible illumination. Then, light, globe, and all, are placed inside a hollow sphere which is painted white on the in- terior, a measuring apparatus is inserted in a hole in the side of the sphere and the amount of light actually passing through the globe is accurately gauged. It discovered that plain, round, shades of the ordinary kind, allow about eighty per cent of the light to pass through. Those less efficient were mostly of art-lantern type. ‘behav- was @ By recent count, the earth has 430 active volcanoes.

Page 26

POPULAR MECHANICS Capt. Harris and One of the “Mercy Bullets’’ Intended to Render Animals Unconscious from Anesthetic “MERCY BULLETS” TO SUBDUE JUNGLE BEASTS FOR ZOO 3ullets tipped with a half-inch barbed needle which will inject an anesthetic into an animal, so that it can be captured alive and without undue suffering, are to be used by Capt. Barnett W. Harris in hunt- ing specimens for the proposed Chi- cago zoological gar- dens. Beasts un- suited for the col- lection will be al lowed to escape after they have re- vived from the ef- fects of the drug. while those that are wanted will be bound and made ready for shipment Roping Gear Adjusted on Horse, and Drawing to Show How It Is Attached to the Saddle while unconscious. Capt. Harris plans to go to Borneo, Sumatra, Australia, Ind and Africa in his quest for animals. CARING FOR THE LINER When an ocean liner has been docked, the officers and crew often begin their hardest work, for between the docking and departure, the great ship must be thor- oughly overhauled and cleaned. One of the first tasks is the repainting of the hull. Next, the funnels must be scraped and brightened with a fresh coat. The mere cleaning of a first-cabin dining room is huge task in itself. Such a room may seat from 500 to 600 persons. The carpeting must be vacuum-cleaned, tables polished and all the interior decorations minute! inspected and restored. It is necessar to count, sort and check some 35,000 piece of linen. Glassware on a liner seldo: numbers less than 25,000 to 30,000 pieces. COWBOY ROPING GEAR REDUCES STRAIN ON HORSE Pulling up short on a plunging steer at the end of a lariat involves considerab| strain on horse, saddle and other equip ment; so, to ease the cow pony’s work and insure greater safety, an Idaho man ha devised an improved roping gear. It is a variation of the breast collar. Its tw sides, instead of fastening together at the top of the horse’s neck, are buckled to straps attached to the saddle just unde: the two front strings. The sides of the rig lie along the animal's shoulders an do not interfere with its movements. The tie-down snaps into a small ring set in tl center of the breast piece. This arrange ment is said to elim inate wear on th: horse's neck, hold the saddle in place in heavy roping preventing com plete turn-over even if the seat | loosely cinched, and since the pull is dis- tributed to th horse’s breast, | gives the pony mor‘ power.

Page 27

POPULAR MECHANICS 903 ROM RAW MATERIAL TO PLANES IN TWO WEEKS Naval Planes Are Being Turned Out Complete at the Philadelphia Factory in Two Weeks and Are Then Ready to Be Placed aboard the Aircraft Car- riers; the Top Picture Shows the Fuselage-As- sembly Department with Rows of Frames for Fast Scouts; Below, the En- gines and Side Panels Have Been Added, and in the Background Wings Are Being Attached; at Left Is a Barge Load Bound for the Ship

Page 28

904 POPULAR MECHANICS HOME IS BUILT WITH WRENCH IN EIGHT Lise e geeeseca ( Completed House and Stages in Construction; the Units Are Joined by a Special Rod Arrangement with : Monkey Wrench, So That No Hammer Is Necessary; the House Contains Three Rooms and Bath To demonstrate a means of solving the housing problem in the army, a home with three rooms and a bath was put up by three men in eight hours. A monkey wrench was the only tool used in the actual construction, as the sections were joined by a patented arch-rod system. The prin- cipal kind of synthetic lumber and, while the house was said to be portable in that the parts could readily be taken apart for = 7 material was a reconstruction else- where, the finished structure was perma- nent and regarded as strong enough to resist earth severe storms and tremors. No foundation was necessary. used for the outside finish. Stucco v The total c was said to be twenty-five per cent | than with ordinary methods. TASK OF WEIGHING THE EART! TAKES SEVEN YEARS Begun by the bureau of standards sev: years ago, the job of weighing the eart is not quite finished, but Dr. Paul R. He government scientist and official weigh expects final calculations to show that t figure already reached is not more than

Page 29

POPULAR MECHANICS million million million tons in error. ler present estimates, the world weighs sextillion, nine hundred and ninety- n quintillion tons. Calculations show it is five and one-half times as dense iter, or, in other words, it would take and one-half globes of water the size he earth to balance the weight of the ere. The atmosphere around it weighs million million tons, the entire popula- less than one 400-billionth part of the ile, and the earth is believed to be solid surface to center and of about the e rigidity as steel. A miniature system inets are used for the weighing. They in a room thirty-five feet below the et, in the bureau of standards building Washington. Two little platinum balls uspended in a vacuum and permitted wing in response to the gravitational raction of two cylinders, each weighing + pounds. The distance of the swing is sured as accurately as possible to ob- a constant upon which to base com- isons indicating the weight of the earth. se measurements must be repeated usands of times to elintinate error. FLOWERS AND FACES OF SHELLS LATEST ART NOVELTY Painting seashells to represent flowers, es, birds and other objects and then unting them, is the novel occupation California woman who has found » lv sale for her work. The pieces are nged with a suitable back and fore- und and can hardly be distinguished hells when properly mounted. » ishioning Flower and Other Designs from Shells; They Are Mounted and Framed for Decorations Flare Signal Which Helps Guard Traffic Policeman in London Fog and Aids in Giving Directions LIGHTS FOR FOG ARE CARRIED BY TRAFFIC POLICE When a London, the traffic police have to get out “pea-soup” fog settles over kerosene flares, not down, but to when to start and their only to escape et the tratnic stop U ual methods do not give enough light to pierce iis being run know the kind of fogs London is occasionall obscured by, so it became ne essary to re sort to the huge column of flame from the oil flare to do the work. @The Popular Mechanics Bureau formation service Names manutacturers and offers its free readers of this magazine. dresses of dealers articles described, and any other details in our possession, will be promptly furnished by the bureau.

Page 30

tet oN a ves

. u

Flying in V-Formation, a Pair of Army Blimps, Photographed from the Control Car of the “‘RS-1,” with a Smoke Screen Laid Down by a Martin Bombing Plane in the Background \ FAT little silver-gray gas bag, sup- . porting a pair of roaring motors and an open passenger car shaped like a high- flat-bottomed motorboat, ‘ross the wind into a flying field, nose for the ground and drops speed, comes sidling points its dow n until a pair of drag ropes can be dropped to a waiting crew. The ship is hauled down for a few ments, while a quartet of suits mo- passengers in boots li | fur-lined and eavy Ccilmvp tifly out and others take their places. Che engineer opens the gas tank, sticks a measuring wand in, cranks up the twin motors, the ground crew and nose up and runs off on another two-hour training flight The place is Scott Field on the flat Illi- nois prairies, leaps ciearT the little craft points its some thirty miles east of St. 1 Louis. The airship bears about as much resemblance to the long lean, graceful cigar-shaped bodies of the “Los Angeles” and other mammoth Zeppelins as a fliv- ver does to a parlor-car-type motor bus. 906 150 feet or so length, is shaped like an enormous tea drop, big and blunt at the nose and tape Wher the Zeppelin has an elaborate framewo! of keel and girders, the little gas bag, Its squat ing away to a point at the rear. army blimps « which the soldiers of the air are train are just g: Deflate them and the <e a toy balloon, and collaps« rudders, el 1 nae ise works, gas vators, passenger car and engines, cat towed on one railroad car. Only the pressure of the gas and a the bag makes it keep its shape in fli Even the big fixed tail surfaces, with the hinged flippers, sticking out at right angle on top, bottom and both sides to act rudders and elevators, are supported e1 tirely by the pressure within. With such simple contraptions, ho ever, the British patrolled their coast li during the latter years of the war an escorted ship convoys for 150 miles at se and it is their boast that they never lost

Page 31

that was protected a blimp. For the lit- iirships, flying 2,000 3,000 feet above the and with a speed of miles an hour, could le around and spot shadow of a lurking marine long before it e to the surface or osed its periscope. the big hangar at tt Field as many as ne or ten ships are kept lated at one time. The ngar is as high as that the “Los Angeles” at kehurst, 172 feet to the of the roof, and is longer, being 810 from door to door. ut of it, the year und, in all kinds of eather, they come to in the army’s lighter- in-air pilots, who are king the hardest course training offered by any service school the country. The student who gradu- from Scott has learned more widely ersified things in one year than other v branches require in a lifetime. When gets through, he is not only a qualified t of dirigible airships of any size, but ewise an expert operator of free and ervation balloons, a skilled navigator, roficient machine gunner, a fine radio rator, an all-round motor mechanician, ood photographer, and half a dozen her things. he course in free-balloon flying is cessary, for, when the engines go wrong any reason, an airship becomes sim- a balloon, and the pilot must know ww to navigate it and bring it to earth. free-balloon training that saved he men who sailed away on the nose of he wrecked “Shenandoah.” Five was day- Control Car of the “‘RS-1,” with the Elevatorman at the Left and the Helms- man Watching the Compass in the Background time flights, of at least an hour each, are made with an instructor, and hour flight at night, and then the student is sent up alone to handle the without assistance or is to sail away before the wind for the re- quired time, then pick out the l one two- gas bag advice. The rule nearest paved road, bring the balloon down be side it and telephone for a truck from the flying field. Next fifty balloon training to be an the classroom, a reproduction of a portion of the battle front in France, twenty feet square and with cleverly concealed elec tric lights to indicate battery flashes, has been used to instruct the students. They sit on high benches, with field glasses at their eyes, getting the same effect as be ing in a balloon a thousand feet in the air, while the instructor flashes lights all comes hours in captive observer. In 9

Page 32

POPULAR MECHANICS lower part of the contains two ballon for air, and as the contracts in landing, is forced in to maintain the pressure and keep the bag filled out to its ¢ rect shape. A _ pair scoops hang below t! bags of the little training ships, looking much |i| the pipes the locomot crews lower from w side water tanks to { their tenders; only, stead of water flowi when the sco behind tl propellers, in the rush air driven from them, t] air flows up, lifts a val and fills the ballonet Besides keeping the b taut when the gas co tracts, or letting off ; to give the helium roo to expand at higher titudes, the ballonets so are useful in landi: down, are lowered Engineer’s Cockpit of a Blimp, with Pilots in the Background; the Projecting ings Support the Two Engines over the map and calls for their exact po- sitions from the class. Not until the observer’s course is com- pleted, is the student with a blimp, first only as a student mem- ready to go out ber of the crew, with experienced instruc- tors to explain the dozens of gauges and controls and the secrets of rising, flying and landing. The training ships are all small blimps, though the field boasts one large semi- rigid for final polishing off. The passen- vith a waist-high side wall, and a few deep leather chairs. No safety belts, such as airplane pilots wear, are used. In a cross wind the light cars roll through an enormous are, until they are lying almost on their sides. Despite the rolling, the crews learn to move about at will without much difficulty. All the blimps are filled with helium gas, which will not burn but is too pre- cious to waste, so they must be handled, if possible, without letting out gas. The ger cars are open, and taking off. Whe the bow ballonet is fill with air, weighting do the nose, it points toward the ground ar the motors can drive the ship down dé spite the fact that it is lighter than a and wants to rise. And when it is ti! to take off, the bow ballonet is empti and the stern one filled, the bow rises ar the motors drive the ship upward and f ward, instead of having it rise vertical! as a free balloon normally would. From the blimps, the new pilots gradu ate to the army’s largest lighter-than craft, the semirigid “RS-1,” 282 feet lor with a gas capacity of three quarters ot million cubic feet, making it about t! size of the “Norge,” which flew over tl north Unlike the smaller blim] the “RS-1” has a framework inside its ga bag, but it consists of only a keel and nose cap, so that when the bag is dé flated, instead of retaining its shape, lik a Zeppelin, the fabric bag collapses and rests on the keel. The keel itself is just a triangular pa walled by balloon pole. sageway, fabric an

Page 33

POPULAR MECHANICS A Small Blimp Ready to Cast Off, at Scott Field, Above, and, Below, the Ra- dio Operator of the “RS-1,”" with the Bomb Dropper at His Feet, Sitting over the Sighting Apparatus in the Floor The Navigating Officer of the “RS-1" at His Chart Table, Equipped with Record- ing Instruments, and, Below, One of the Engineers at His Post in the Gondola, Each of Which Carries a Pair of Motors

Page 34

910 containing gasoline tanks and a catwalk by which the crew can reach the pair of engine gondolas, or climb up to a trap- door in the nose when the craft is moored at a mast. When in flight, an engineer sits in a chair in each engine nacelle, watching an instrument board that tells how the two big engines which drive each of the propellers are working. An indi- cator, like those used on ships, brings him the pilot’s orders from the control car, which he can see half a hundred feet ahead of him. Between the two motor cars is a narrow metal walk connecting them, and from it a ladder leads to a hatch in the bottom of the keel, so that relief crews can come and go. The control car itself is a two-room compartment, mostly glass in front, where a pair of helmsmen stand, one at the rud- der, with an ordinary ship's compass be- fore him, to keep the ship on its course, ind the other at a second steering wheel, which controls the elevators and points the big gas bag up or down. Beside them, the watch officer. keeps one eye on their activities, and the other on the controls of all the gas and air valves, the blower that takes the place of POPULAR MECHANICS the air scoops on the smaller ships, the ballast releases and the drag ropes. The other occupant of the forward cabin is the navigator, seated at a table with the map spread before him, and, in addition to the usual instruments of a navigator at sea, a set of recording indicators that give air speed, altitude, compass course and other information. The second cabin contains the radio op- erator, the bomber, who sits in a hatch- way that opens up in the floor, and four canvas bunks for men off duty. To fly a ship of that size, with the lives of a large crew at stake, requires excep- tional training. Some idea of how rig orous it is, may be gained from the fact that, of twenty candidates who had ‘been picked recently for the service, only fou got by the rigid physical examination at Scott Field, and only one of the fou passed the mental examinations for en trance. And by no means all of those who actually get in and take the yea course are passed as pilots or observe: Col. John A. Paegelow, who rose fro: a private in the army in Spanish-America: war days to be commander of all the o! servation balloons of the First Army France, and is now commander of the training school, says air Ss ship piloting takes an en tirely different type ot man from that needed for an officer on the ground. “He has to have more self-reliance, more ability to work and to ac in emergencies. Infantry) on the ground could be described almost as mob fighting. In aircratt a man is his own manding general and he must be able to act or his own initiative — and instinctively. “The sluggish man | no good, for his brain doesn’t work fast enough The pilot of a big airshi has to have mind and muscle so perfectly co ordinated that he com does The Giant Army Airshio Hangar, with a Blimp and a Balloon Inside, and Another Blimp beside the Small Balloon Hangar everything instinctively at the right moment. He

Page 35

POPULAR MECHANICS How Aerial Observers Are Trained; the Class, with Binoculars, Spots Battery Fire as the Instructor Switches on Concealed Lights beneath the Replica of Part of the Front Line in France to feel a deviation from course or a e or fall of a few feet and instinctively rect it. Just learning to steer a ght course is a task in itself. It is rd enough to hold a ship on its course uch a comparatively stable medium as ter, and tremendously harder to do it air, when you are at the mercy of every rrent, and have no foaming: wake or ndmarks to set you right.” Despite all its difficulties, however, Col. egelow believes there is a good future lighter-than-air ships for a young man good physique and a good education, rticularly in mathematics. The future es not only in the service, but in the com- ercial airship lines which, he believes, re sure to come within a few years, par- ularly for long routes across the ocean. the same future for the en- ted men who qualify as mechanics, for hey are proving so popular with commer- il flying companies that many are being ught out of the service to earn good laries with private concerns. There is The piloting school is open to anyone ho can pass the tests, including enlisted en from eighteen to twenty-seven. Quite few privates have made the grade, get- ting the title of cadet—and three times a while in the school—and later are entitled to qualify for lieutenants’ commissions. private’s pay they have finished the year’ course, however, they have sat up man) nights wrestling with textbooks that cover such subjects as army administration, field regulations, guard duty, military courtesy and customs, hygiene and first aid, military Before law, rules of land warfare, aerodynamics, service supply, armament, army organiza tion, artillery liaison, free and captive bal loons, communications, gas, meteorology, military sketching and map reading, aero nautical balloon motors, motor transportation, winches, parachutes, aerial pho tography, physics, mathematics, panoram ic drawing, practical observation, tactics of balloons and airships, and an almost endless array of instruments. of navigating and control Besides the classroom work and theorv. the students tear and craft engines until they can do it in the dark; build and take down machine gut blindfolded; help build new ships and re pair old ones, down rebuild ait learn to rig balloons and patch gas bags. and a thousand and ons other things. When the time comes, though, to take aloft one of the smaller blimps on a flight, with no instructor along to give possibly advice and only an engineer and a radio operator as comes a thrill that is unlike any thrill in heavier-than-air companions, there navigation

Page 36

912 POPULAR MECHANICS THE AMERICAN SOLDIER AND HIS LATEST WEAPONS The Doughboy and His Arms, Which Include All the Infantry Weapons, from Pistols to Battle Tanks Modern warfare, as represented by a group picture recently made by the war department, shows the infantry uses such varied arms that the foot soldier must be a skilled mechanic before he can fill all departments. The picture displays eight different weapons, ranging from a hand grenade to a battle tank. On the left is an infantryman about to throw a hand grenade; next a companion is loading a Stokes mortar, built to be set up in a trench to throw large bombs into tl enemy lines. The third figure carries th: standard army rifle with fixed bayonet while behind him kneels a soldier with rifle grenade fitted in the barrel ready t be fired. Next, prone on the ground, an automatic-rifle operator with his port able machine gun, and beside him a ma chine gunner with a large water-cooled weapon, while a_ thirty-seven-millimete: field gun and a battle tank are in the rear. TIME LOCK TELLS WHEN STORE IS OPENED AND CLOSED Accurate record of the time the store is opened, when it is closed, and by is afforded the pro- prietor in a special lock equipped with a clockwork mecha- nism and registering tape. [t insures punc- tuality and keeping the doors open the required time to pre- vent loss of trade. There are six keys to each lock for as many employes. Each key has a different initial at the end. When it is inserted into the lock, it presses against whom, a tape, registering the initial and the time when the door was opened or closed. B: removing the tape at the end of any de- sired interval, an accurate check is ol tained as to how long the store was open released or se cured the lock eac! time, and when, that any departu: from who Side View of the Store-Door Time Lock; as the Key Is Pressed, Hour Is Reg- istered on Tape schedule 1 plainly indicated fo: that period. Th: device is said to be suitable for chain stores, fill- ing stations and sim ilar concerns, but is equally adapted to individual shops, stock rooms and manufacturing plants. especially

Page 37

A tubes on one of its faces. larked resemblance to a in a forty-two-passenger motor bus,. ently built for surface lines in Chicago ced under the center of the car. | rear entrances are provided. POPULAR MECHANICS rOMATIC RADIO-TUBE TESTER MAKES FEW MISTAKES evidence of the large-scale produc- is necessary in many radio-man- iring plants today, an automatic tube has been installed at an eastern with a capacity of 30,000 tubes a [his is about fifteen times the num- hat a skilled person can test by hand 1 hours. During operation for several hs, the outfit maintained an accuracy | of 99.9 per cent, the small fraction rror being charged to the accidental duction of defective tubes into the stock, according to the engineers. tester consists of a revolving disk, it three feet in diameter, with sockets As the disk the tubes are connected successively instruments which test them for va- characteristics. Those that are de- e are pushed out of the sockets by Bad tubes are put in a scrap those that can be reclaimed are laid unger. ving belts to be conveyed to oper- for further treatment, and the good are sent to be wrapped. MOTOR BUS LIKE STREET CAR HAS TWO ENGINES street car is “feeder” to the main system. It has four-cylinder engines and these are Front The bus ghs 13,000 pounds and costs consider- less than the average street car. ible-Motored Bus Resembling Street Car for ‘‘Feeder”’ Benches Just for Two Persons Have Appeared in the Denver Parks; Occupants Face Each Other PARK BENCHES BUILT FOR TWO TO SIT TETE-A-TETE Fifty benches so arranged that the oc- cupants sit opposite each other were placed in the Denver parks early this sea- son, supplanting an equal number of the older, long kind. make conversation easier and prevent in terruption of a visit between two persons They are intended to PLAN JAIL BREAK WITH GLIDER San Authorities at Quentin prison in California recently thwarted what was be lieved to have been a jail inned on modern lines, break p! an attempt to escape by means of a glider. The machine, in course of construction, was found on the the factory ‘ Parts had been obtained from various prison de TOOT ot furniture partments and che cover- ing tor the wings and fuselage wasa bolt of ma- terial taken from the flag The “4 Casily builders sailed over the prison wall from room. might have the roof. @ Blocks of salt were once used by the people Service in Chicago Of China for paying taxes.

Page 38

914 POPULAR WOMEN IN BANK ARE TRAINED IN USE OF REVOLVER Women Revolver Experts and a Silhouette Target as It Appeared after Practice at Forty-Five Feet Women employes of banks in South Bend, Ind., are given revolver practice so that they will be able to cope with bandits in case of an emergency. One woman made a perfect score from a distance of forty-five feet and others showed credita- ble marksmanship after only a few lessons. The result of one group’s shooting is in- dicated on the target in the illustration. MERRY-GO-ROUND HOUSE TURNS WITH THE SUN Sunlight in any room and at almost any time of the day as well as a changing view are possible in a “merry-go-round” house devised by French architects. It is con- structed on a turntable MECHANICS of pressing a button. A novel arrar ment of rooms permits new schemes oi terior decoration. METEOR NEARLY STRIKES MAN ON NIGHT BICYCLE RIDE Many meteors fall to the earth durit year, but there is apparently no reco: one killing a person. One of the nea: approaches to such an accident wa ported recently from England by a cy who declared that a meteor fell wit! seven yards of him while he was ridin night. He first heard a peculiar whist! noise, then saw a bluish-green light. noise increased while whz: appeared to a ball of fire, about the size of a coco! fell in front of him. He dismounted found that the road was covered wit! peculiar ash at the spot. It stuck to shoes and to the tires of the bicycle. | servers, on hearing the cyclist’s story, « pressed their belief that it could hard! doubted, and several persons reported t also had heard the noise of the meteor COMBINE PLANE AND DIRIGIBLE FOR GREATER UTILITY Trips across the Atlantic in sixty hou are visioned by a Los Angeles invent who has devised a model dirigible of no form, to suggest the means by which hopes to realize his dream. The ship essentially different from others in that is flat instead of cigar-shaped and there a twelve propellers, five on each side at two in front. There is a running ge for land travel, and it is expected that t like that used in railroad vards. A touch of a but- ton starts it moving, and it may be stopped in the same manner. The but- tons are placed in various parts of the house for convenience. The speed is dependent upon the size of the motors, but an automatic arrangement permits startingthe house moving in the morning so — NL ae that it will follow the sun all day without the need Model of the Combination Plane and Dirigible Intended to Make Ray Flights across the Ocean

Page 39

POPULAR suld skim over or the water and sail ly in the air. The ype is to be filled rAd. MORE MUSICIANS FOUND IN JU. &. (HAN LAWYERS ull-time musicians, edependent entirely n music for a liveli- greatly outnum- the clergymen or vers, in this country, usic house reports. ee times as many ons are earning living with music here are dentists or and there are times as many mu- ians as journalists. ‘se figures do not in- thou- who supplement the many regular occupa- by some form of cal endeavor. One he signs of the de- oping interest in ic is the increasing ber of school bands l orchestras. Teach- formerly was confined largely to as- ibly singing, but now many schools have ious musical organizations, and the ue of musical education is recognized. AUTO MATCH AND ASH HOLDER WON’T RUST OR RATTLE asily attached iny part of the tomobile, a der for matches ] | ashes can be nipulated with ly one hand and Ss not tarnish, it is finished in rk lacquer over lid brass. The h chamber is deep so that the contents nnot blow out, and it is easily emptied. MECHANICS ~ Illustrating How the Radio Rescue Set Could Be Used in the Alps; Sending Outfit in Foreground RADIO REPLACING ST. BERNARDS FOR RESCUE WORK IN ALPS Travelers lost in one of the passes over the Swiss Alps can now signal distress by radio from sending units placed at several dangerous places on the mountain side. Guides, equipped with portable receiving sets, go to the rescue on short notice. CHURCH SPIRE AS LIGHTHOUSE GUARDS ATLANTIC COAST For many years, a light in the steeple of the First Baptist church in Beverly, Mass., has been a guide to and upon request of several sea captains, the mariners, now, government has taken over the spire and it is under the jurisdiction of the light Although it is several miles inland, the light is visible far out at sea. house service.

Page 40

916 POPULAR MECHANICS that can be grown he: & Various parts of Flor | Texas, New Mexico other sections of the country yield a num | of such plants, but vantage cannot be ta! of the fact for the rea that the labor cost volved in preparing thie raw substances would be so high as to make co: petition with cheap { eign labor impossib Edison, therefore, se an apparatus that w take the task out of m: hands to a large ext enabling a rubber man Indoor Golf with Billiard Cues; Table Top as Eighteen-Hole Course with here, paying from $3.50 Numerous Hazards to $4 a day and more GOLF GAME PLAYED ON TABLE labor, to compete with the grower in WITH BILLIARD CUES Africa, for instance, who pays thirty cent a day or less. He is working on the pr Indoor golf on a table, the top of which lem near Fort Myers, Fla., and is usi: is spaced,off to represent eighteen holes, the Madagascar rubber vine as raw 1 is played @ith a heavy disk, about the size terial. This plant is known to grow of a dolla} for a ball and ordinary billiard in Florida, but, so far, no practical \ Tl cues for€lubs. Various obstructions are has been found for extracting its ju provided as hazards, and those who have Edison declared recently that he was “ played the game declare that it affords ing to work twenty-four hours a day,” much of the thrill and enjoyment of the necessary, to see the accomplishment \ regular outdoor pastime. the great aim for American-grown rubb eaten In 1923, congress appropriated $500,000 { EDISON JOINS HUNT FOR RUBBER) ‘“t"¢Y © the problem. THAT CAN BE RAISED HERE DISCOVERY OF CYANITE PROMISES BETTER SPARK PLUGS Quantities of better spark piu are expected as a result of the d covery of a huge deposit of c One of the most important studies the government ever has made, is the four years’ search for a kind of rub- ber tree that can be grown in this country to give us our own supply and make us independent of foreign monopolies. To help in this hunt, there was enlisted recently the aid of America’s greatest inventor, Thomas A. Kdison, who is seek- nite, a silicate of aluminum, t! can withstand repeated exposu: to high temperature, in Nort Carolina. Investigators estin that there are 10 000,000 tons of material in a sins mountain, and t specimens so i = ; taken are of remat efficiently extract the a able purity, some juices from rubber- - them assaying ni! . : Where Valuable Cyanite Deposits Have Been Found, A Se ae prod ucing pla nts Sample of Mineral Discovered in North Carolina ty-five per cent. A ing a solution of the riddle, not by plant culture but by trying to devise a machine that will cheaply and

Page 41

VV Stte life is counted cheap in the vilds with its nge peoples, vet and lure beasts holds a savage ’ Africa own and is probably safer than our cities because there the danger is zed and can be guarded against. \nd, despite the hidden are the days on the sunny African nds far from the perils, how noise, ' crowds and d and gloom of modern civilization One day on the wide Athi plains, when I pened to be out all alone exploring region, Il saw a black object in the tance, and believing it to be an ostrich, ked carefully toward it. On however, | getting found it to be a rhi- eros lying down, so I determined to try take a photograph, but he jumped up circled around until the wind gave a clue of my whereabouts when, to dismay, with the agility of a cat, he ldenly whipped around, snorted loudly came for me straight as a dart. I only small-bore rifle and soft lead bullets me and, of course, it was quite useless this toy weapon to attempt to stop By LIEUT. COL. J. H. PATTERSON, D. S. O. What was I to do? To run away would be of no avail for him. there was no shelter. To my frightened eves the great beast looked like a mountain as he raced for me, and there was not a moment to be lost. I tore off my big sun hat and flung hoping he would see it from me, and rend it instead of me. I then dropped to my knees. Lower and lower I crouched until | lay full lenet!] Ina little bit of gTAaSS, ind with a quaking heart awaited my fate Onward thundered the brute, and to my intense relief he ch irged between me and 1 my hat without seeing either. As soon as he had passed, I felt so h that I could not resist the DD. pt temptation ot him to sending a couple of bullets after speed him on his wavy, soft bullets simply splintered against his thick hide, sending clouds of dust off his back. The bullets, however, tickled him up and ap : 1 a ee ae Oe ee i paren iniu ited 1 , so ne stopped short in his tracks, turned around, moved : as —_ his great head right and lett, tore up the ground with foot and horns and then er , to mv horror—repeated his tactics of trot-

Page 42

Noted for Its Fierce Charge and Unexpected Agility, the Rhinoceros Is a Formidable Adversary ting around in a circle until he again got form a background. my wind, when he once more, with snort and a _ present ‘ 918 POPULAR MECHANICS a glimpse of the enrag monster crashing by, a: practically over me, : more than a couple of fe away. My relief may imagined, and when I h summoned up enoug courage to take a peep, t most charming sight I ey looked on in my life w the rhinoceros disappea: ing Over a hillock. After this adventure left the plains and took the Kikuyu hills, where suddenly found myself su rounded by a horde « naked savages armed wit spears and shields. The bodies were smeared over with white clay, a: many artistic designs h been produced by rem: ing the clay with a sti and leaving the skin A little diploma: of “Amerikani” (cott of rage and tail erect, bore down upon me. This time I feared there would be no es- cape and the dire predicament in which I now found myself was entirely due to my own folly. I felt the ground tremble as the great brute rushed toward me, and every moment I expected to be trampled goods) got me out of their clutches and went On my way rejoicing. The Athi plains again called me, here I had yet another narrow escape tr death, this time from the king of bea I went lion hunting one morning on vast expanse, accompanied by a friend v to death or tossed on his formidable horns ing to breathe, I was overjoved to catch had shot tigers in India, but who —but luck was with me again, and as I never yet encountered the African lay pressed flat into the grass, hardly dar- On this occasion I rode Aladdin, a ited Arab charger, and my friend, Spoon: IEUT. Col. Patterson, known as one of the greatest authorities on lion hunting, was sent to British East Africa in 1898 to help build a railroad through the jungle. He arrived as a civil engineer and departed world-famous as the killer of two man-eating lions that had devoured 135 of his workmen before they were slain. In all, he has killed twenty-eight lions. Col. Patterson served in the Boer war and was awarded the Queen's medal and made a Companion of the Distin- guished Service Order. During the World war he was in command of the Zion mule corps in the Gallipoli cam- paign. He has traveled in many parts of the world.

Page 43

POPULAR MECHANICS 919 rode in a tonga, a two-wheeled cart drawn a couple of ponies. We scoured the broad plains for hours without much suc- ess. When we were about to give up our quest and return to camp, I suddenly felt my horse tremble violently and then up out of the grass close by jumped a spotted hyena. I looked after the ugly beast for a moment, but as Aladdin continued restive, | glanced over my left shoulder and saw two huge lions a few hundred yards off, itting dog-fashion gazing intently at us. I houted to Spooner, who was following me n the tonga, “Here’s what we're after.” | umped off Aladdin and we advanced on the lions. “Now, Spooner,” said I; “you take the one to the right and I'll take the one on the left. Fire when you're ready and take no notice of me.” The moment Spooner fired, I pressed niy trigger and had the satisfaction of see- ing my quarry rise r sd claw the air as he was hit. Both lio: ‘nstead of rushing at us, as I had expe , instantly turned and disappeared over ihe bank on which they had been sitting. I ran to Aladdin, leaped into the saddle and gave chase. \fter about a quarter of a mile of hard go- ing, | began to overtake the fleeing beasts, Natives of the Kikuyu Hills with Spears and Shields and Bodies Smeared with Clay, to Form Designs; the Dark Marks Are Skin Areas from Which the Clay Has Been Removed and then, when they found I was catching up with them, they lay down and waited for me. When I had approached a little nearer, one of the lions made a vicious charge. | immediately turned around and made Aladdin show his best paces. The lion's charge only covered some sixty yards. He then lay down and waited. Presently Spooner arrived with the rifles and I said to him, “You shoot that lion”; so he knelt down, took careful aim and knocked the lion over stone-dead. The second lion watched us all the time, but never moved. He now growled viciously and swished his tail so vigorously that he raised quite a dust over his body. We ad- vanced cautiously toward him. I was on the left a little in front, and on Spooner’s right was his gunbearer, who carried a spare heavy rifle. The moment Spooner fired, the brute came for me. I fired, but apparently missed, and he was almost within one bound of me when he suddenly flashed past, and then I saw Bhoota, the gunbearer, running away. The next in- stant, the lion had seized the unfortunate man by the leg and had rolled him over as All this hap- pened in an instant. I began to run up a greyhound would a hare

Page 44

POPULAR Bunks in Trees Where Railroad Workers to Avoid Lions, “Fort” of Ties Built on Girder at Station during MECHANICS himself upon me, he fel dead on top of Bhoot We rolled him off an hurried the unfortunat: Shikari back to camp. W, had to amputate his le; and, although he lived fo: about six weeks, th: shock was too much an he died. My life-and-deat struggle with the man eating lions of Tsavo wa the last round in the lon; fight which has gone o: all down the ages be tween man and beasts. am convinced it is th: last fight, because, owin; to the advance of civiliza tion, such happenings a I am about to set fort to the lion and as I did so thrust a car- tridge into the breech of my rifle. I had to face the lion’s head and saw him chew- ing Bhoota’s left arm. Spooner was actu- ally trying to shove the lion off the un- fortunate man so that he might get at the heavy rifle, which the poor fellow still clutched. The enraged brute never saw me until I put the muzzle of the rifle to his brain. Then I pressed the trigger and, horror of horrors, the rifle missed fire. The lion saw me and I felt that my last moment had come. He opened his jaws, and slowly threw himself on his haunches as if to spring. I remember saying to my- self, “He'll never give me time to reload.” I looked into his eyes steadily as I care- fully and slowly moved one pace back. I moved two paces back, and then it sud- denly struck me that in the hurry and ex- citement of the moment, I had forgotten to cock my rifle. Todoso, and puta bullet into the lion’s brain, was the work of an instant, and, as he was about to launch can never again occur. Tsavo is situated some 130 miles fro: Mombasa on the East African coast. It is in the depths of a vast impenetrab! jungle of thorn scrub, stunted trees an: dense undergrowth. In this tangle, th: man-eaters laughed at all our efforts t destroy them. We could not penetrate it save by slashing and hacking a path ever yard of the way, while to the lions th« jungle was as an open book. I was engaged in this wilderness build ing a railway bridge over the Tsavo rive: when there appeared upon the scene th¢ notorious man-eaters, whose record fo: sheer ferocity and absolute contempt 0! man surpasses anything hitherto know! in lion history. They feared nothing neither the roar of the rifle nor the blaze of the campfire. Traps, spring guns and firebrands they alike laughed at. They waged an intermittent warfare against our

Page 45

POPULAR MECHANICS ee Bhoota, Center, Sitting Up in Bed under the Shadow of the Skin of the Lion That Wounded Him; Spooner Is at Left and the Author at Right of the Picture borers and in the end succeeded in bring- ‘ the work to a complete standstill. In te of all our precautions, man after man taken from the midst of his sleeping rades and devoured in the surrounding kets. \ly own first encounter took place near vacated camp site which I felt sure the is would visit. I had a wagon placed ir the opening of the inclosure, and re, in the company of my friend, Dr. ick, we sat in the open doorway and ited. When I now think of the fool- rdiness of this procedure, it makes me udder, but at that time we did not think the danger we ran. We sat in the igon for a couple of hours in perfect ence enveloped in darkness and then I heard a dry stick snap. lull thud, as if ‘The man-eater,” I whispered to Brock. \ few minutes afterward there was a some heavy body had umped over the inclosure. Then we ird some cattle running about inside, nd after that all became still. I pro- ed to my companion that I should nb out and lie on the ground so as to a better shot at the brute if he should ine in our direction with his prey, but ock fortunately persuaded me to remain ere I was, for at that very moment the an-eater was actually stalking us. \fter a few minutes of intense peering © the darkness, I thought I saw some- hing glide to a bush near our front. I + asked Brock under my breath, “Did you see anything move?” but he made no re- ply, so I held my rifle in readiness and waited. Those two or three moments I shall never forget. I felt instinctively that some uncanny deadly creature stealing toward us, and I even thought I could discern a form of some kind, but I feared to fire lest it were only my imagination running away with me, and in that case | should merely frighten the away. Was man-eater The darkness and silence could almost be felt, and for those few seconds the strain on my nerves was almost unbear- able. Then—suddenly—a_ huge sprang at us. “The lion!” I shouted, and both our shots rang out simultaneously. The noise and flash of our rifles so terri- fied the man-eater that, instead of leaping right into the wagon, he turned in his spring, but he got so close to us that | felt the swipe of his paw across my face. We fired a few more shots in the dark- ness in order to prevent a second attack and then lit a lantern, and while I closed the door Brock stood ready to shoot. We had the luckiest escape that night that it is possible to experience. Only our keen vigilance and some good guardian angel saved one or both of us. Next morning we found Brock’s bullet imbedded in the sand close to a footprint. It could not have missed the lion by more than an inch body

Page 46

Q?? Mine had hit the lion in the mouth and smashed away two of his tusks. A little later on, the man-eaters got bolder and, instead of attacking singly, as was usual, both lions entered the camp together and each seized a victim. I sat up night after night near likely places, but always in vain. Either the man-eater saw me and went elsewhere, or else I was or two. unlucky, for as I sat watching over one camp, both brutes would attack another a quarter of a mile away, and I would have the mortification of hearing the agonized cries of the unfortunate men as they were being carried off. This constant night watching was most dreary and fatiguing, but I felt that it was a duty that had to be undertaken, for the workers naturally looked to me for pro- tection. I wish I could convey some idea of what it felt like to be perched in a tree all alone in that desolate wilderness on a dark night and to hear the deep roars of these dreadful monsters reverberating through the jungle and drawing gradually nearer and nearer. In the whole of my life, I have never experienced anything more nerve-shaking than to lister to these lions give forth their death challenge and to know that some one or was doomed to an awful morning. other of us death before Once the lions reached the vicinity of POPULAR MECHANICS the camps the roars completely ceased and we then knew that they were stalking fo: their prey. Shouts would pass from camp to camp “Khabar dar, bhaieon, Shaita: ata” (Beware, brothers, the devil is com ing), but the warning cries would prove o} no avail, and sooner or later, agonizing shrieks would break the silence, and an other man would be missing from roll cal! next morning. About this time I invited Mr. White- head, the district governor, who lived some thirty miles away, to come and assist me in my campaign against the man-eaters He accepted and told me to expect him about dinner time. His train was due at six o'clock in the evening, so I sent my Indian servant up to the station to meet him. In a short time he came rushing back, trembling, in terror, and informed me that there was no sign of a train o1 of any of the railway staff, but that a big lion was walking up and down the plat form. As Whitehead did not turn up, | went on with dinner, and heard a couple of shots fired, but as shooting was a com mon occurrence, I paid no attention. Shortly after dusk I took my position in a crib made of sleepers perched on the end of a girder, and soon heard the man eaters growling and purring, and crunch ing up bones about seventy yards away (Continued in the next issve) All Foodstuffs and Barter Goods Had to Be Carried for Hundreds of Miles on the Heads of Natives; Some Parts of Africa Have Not Yet Been Explored by White Men

Page 47

POPULAR MECHANICS ELL FORECASTS STORMS ND WEATHER CHANGES BY WHISTLING eastern Oregon is an inter- ng well that not only gives plies of good water but acts as rt of barometer to tell the ap- ich of storms or changes in weather. From twelve to ntv-four hours before a storm, ‘exhales” a current of air. The (ft increases as the storm ap- aches, sometimes reaching the ensity of a whistling, roaring and shooting up a mist of ter with it. After the disturb- ce has passed, the well draws air until an apparent equilib- is established within and quiet until the next weather nge. One theory explaining ‘ phenomenon is that the shaft nnects several pockets or cham- containing air of a temperature and sure approximately constant. Air out or into the well, according to inges in the pressure at the surface. e long periods of activity are explained the smallness of the opening through ich the air must pass. The well is ied to a depth of 458 feet through ba- + t and other older formations. CUTLERY FROM OLD WIRE ROPE HAS KEEN EDGES Discarded wire rope has been utilized an Oregon blacksmith in fashioning various kinds of cutlery from hunting to carving knives. Plow-steel hoisting cable is used for the knife in the accompany- g illustration. A short piece was flat- tened, welded, shaped and tempered for eight inches of its length. The remaining elve inches were curved forward and Heater Lowered and Raised to Serve as Shelf; It Saves Space and Is Easily Installed ELECTRIC HEATER FITS ON WALL AND SERVES AS SHELF Double service is obtained from an elec- tric heater intended especially for installa- tion in the bathroom, doctor's office, nursery or similar place. It is made of porcelain-enameled steel and either is hung against the wall or may be swung up at right angles, as a convenient rack for heating flannels and clothing, keeping medicines warm, or for drying towels and other articles when the current is on. A switch gives three stages of heat. BELLS HUNG ON RATS’ NECKS TO DRIVE PESTS AWAY Officials in charge of a postal substation in Dallas, Tex., adopted a scheme of bell- ing rats to drive the rodents out. Four of the animals were caught with traps, elded to the hilt r form a handle. Vhen ground and harpened,the knife id an edge that and small bells were | placed on their necks. They were valed that of a zor and held its keenness longer han the average kitchen carver. apparently spread Z | then released and He | | i \| | ; : Carving Set from Oid Wire Cable; the Blade Keeps Sharp Edge as It Is Made of Plow Steel dismay among the others, for the sta- tion basement and rooms were quickly rid of the pests.

Page 48

POPULAR MECHANICS Where Cactus Grows to Tremendous Heights; Ladders Are Needed in Examining California Specimen GIANT CACTUS AFFORDS HOME FOR SCREECH OWLS Examination of species of giant cactus, in Lower California, required the aid of a ladder, as some of them grew to such a great height that the tops could not be reached without climbing. Screech-owl homes were found in some of the holes that woodpeckers had made in the cactus. BIG ELEVATOR UP MONT BLANC TO CARRY FIFTY PERSONS The top of Mont Blanc, Europe's high- est mountain, will soon be reached in two hours without climbing or guides by the completion of a cableway from Chamonix to the summit of Aiguille du Midi. The installation is like a big hotel elevator and carries from fifty to seventy passengers. Construction was begun seventeen years ago but was delayed by the war. The trip to Aiguille du Midi takes one hour and the remaining two-thirds of a mile to the top of Mont Blanc is easily covered in anoth: hour by a new comfortable road. FIFTY-THOUSAND-YEAR-OLD LOG FOUND IN DIGGING WELL Pieces of a tree believed to have been buried at least 50,000 years ago were brought up from a depth of 754 feet while digging a well in Tacoma, Wash., recently. The wood was well preserved and the bark readily distinguishable from the rest of the trunk. While the species was not dete: mined, it apparently was some kind of conifer. The discovery indicates that the area was timbered before the glacial age, as the strata in which the tree was found are believed to have been deposited before the last ice period in that part of the coun try. The glaciers and river deposits had covered the trunk, and as it was almost completely immersed in water, it had not suffered any decay. SEAT FOR INFANT FITS ON CHAIR IN AUTO OR SWING Fitted with a tray, a secure back and sides, a seat for infants is hooked to an ordinary chair or may be used in the auto or suspended by cords as a swing. The bottom can be thrown back and the seat used as the toilet. The hook ts covered to afford a firm grip and prevent damage to the furniture. rubber Infant’s Seat and a Few of the Typical Uses to Whi It May Be Adjusted J

Page 49

Sectional Diagram of the Moffat Tunnel and Its Companion Water Bore; the Saddle above It Is Rollins Pass, through Which the Railroad Has Made Its Way for Many Years How Rail Builder’s Dream Came True Moffat’s Tunnel Cuts Coast-to-Coast Lines Seventy Miles and Opens Vast New Empire for Cities and Farms in West f Whaberiert Ss, VE years ago, a sixty-five- vear-old pioneer of Denver dreamed dream in which the Colorado metropo- became a stopping place of a through ntinental railroad; in which the vast nd potentially valuable western section Colorado was opened to settlers with n assurance of direct transportation to e markets for their produce, and in which he backbone of the Rockies was to be erced by the greatest railroad tunnel in \merica, to make the dream come true. He labored for nine years, sunk his own reat fortune and the fortunes of many of his friends, and when David H. Moffat nally died, the tunnel had not even been tarted and only 214 miles—about one- hird—of his proposed railroad to Salt Lake City was completed. It took another sixteen years to see the (ontinental Divide blasted through with six and nine-tenths mile tunnel, but finally it has been opened and the Moffat tunnel is in operation as a permanent me- morial to the visionary who conceived it. Asa result, a new combination of railroads is in prospect to create a transcontinental system that will be seventy miles shorter than any existing route, and, when a con- necting link is built, Salt Lake City will be brought nearer by 173 miles to Denver. When the traveler rides at ease through the long bore, he will pass 2,400 feet below Rollins pass, through which the railroad, after a tortuous climb, has wound its way all these years since Moffat saw the first rails laid. For a time, the bore will hold the title of the longest railroad tunnel in America, though the Cascade tunnel, now being built by the Great Northern, is soon, with its seven and a half miles of length, to take that honor away. In one way, however, it will remain unique—the only railroad tunnel ever built by a city, for it was the money of Denver, aided by surrounding counties, which made the tunnel possible. Eventually the city and counties will get it all back, with 925

Page 50

926 interest, through the railroad rentals, but in the meantime the people who furnished the funds will secure two advantages— one the opening to their market of west- ern Colorado, and the other the use of the pioneer bore, a smaller tunnel seventy-five feet to one side of the big one, conduit. as a water anticipating future water needs, the city of Denver filed on 100,000 along the headwaters of the Fraser and other streams, on the west side of the Continental Divide. When it came time to build the railroad tunnel, a smaller bore was rushed through parallel to it, with short connecting tunnels at in- tervals, so that work on the railroad tube could be carried on from a number of points. Now these connecting passages will be closed and the water from the Pa- cific side of the will be carried through the mountain to be consumed on the eastern slope. Years ago, acre-feet Rockies With unparalleled engineering difficul- ties to face, the pioneer bore enabled the builders to complete the work in the al- lotted span of forty-six months. The cost, estimated at $6,720,000, has been nearly doubled because of the difficulties encoun- tered, and to solve them, the engineers have had to create their own machinery. One trouble arose when Crater lake, a pretty little mountain pool lying in a valley nearly a thousand feet above the bore, be- gan to drop its entire contents into the shaft. Huge pumps worked for months to carry away the flood and keep it down to the point where men could work. To facilitate drainage, the tunnel has been POPULAR MECHANICS built with a peak in the center, away to the east and the west. Another problem arose when the miners found that the rock inside the west portal, where geologists had predicted hard gran- ite, was really soft and crumbly and dis- solved into muck when exposed to the air It made easy digging, it is true, but it was so soft that the walls and ceiling would slide into the hole as fast as the tunnel! was dug, so soft that it oozed between all but the most perfectly fitted timbers Huge twelve-by-twelve-inch beams were crushed under the immense weight into a mass of match sticks. It was only possi ble to dig when the roof was supported and to support it the engineers devised an entirely new machine in tunnel work the traveling cantilever needle bar. The needle bar was really two immense stee! girders, three and a half feet thick and sixty-five feet long, ri aie igi sloping tied together by r struts and braces and supported on enor mous foot-square stringers of Oregon fit Resting on the “bench” at the tunnel head- ing, and with a third of their length pro jecting to the rear, the girders carried the supporting timbers that held up the rooi while the muck was carried away and per- manent timbering put in place. All big tunnels are dug with a bench at the head ing where the men work, because their size makes it impossible to work from floor to ceiling without scaffolding. To get around the difficulty, the miners blast out the top half first, and leave the lower half, or the bench, which is removed, always a day behind, the heading being twenty to | SCALE OF MILES Map Showing How the Moffat Tunnel Pierces the Divide and Cuts Off Many Miles of Tortuous Curves and Steep Grades on the Railroad Route from Denver to the West Coast

Page 51

POPULAR MECHANICS West Portal, with the Final Wooden-Segment Arches in Place and the Space Above Packed with Dry Cord- wood, Used to Hold Back the Enormous Weight of the Crumbling Rock rt. feet ahead of it, depending on the ture of the rock. he needle bars carried between an endless-belt conveyor to remove muck from the face to the waiting while specially designed electric vels, built to work in close quarters, oped up the muck of the bench as it blasted free and eliminated the usual ngs of “muckers.” he new territory in northern Colorado ch is now being opened to intensive de- lopment includes 15,000 square miles of | lands, 11,000,000 acres of forests, vast also . oe " ls of oil shales, and an extensive deep pool which has been within the last vo years near Craig, the resent terminus of the loffat road. Building tone, marble quarries, ement, valuable clays, ietals of various kinds pened and radium-bearing earth, as well as fertile valleys are also among the resources. STEAM BUS RUNS SMOOTHLY AND BURNS OIL Elimination of unpleasant fumes as well as the noise and vibration attending the operation of a gasoline motor, is one of the desirable features attributed to a steam bus with a rotary engine. It oil or kerosene, fuel which is burns one gallon of said to give as much mileage as a gallon of gasoline in a motor bus of like capacity. Chassis of the Oil-Burn- ing Steam Bus with Ro- tary Engine

Page 52

POPULAR Another Use for Ostrich Plumes; Fashioned into Deco- rative Floor-Lamp Shade OSTRICH-FEATHER LAMP SHADE LATEST NOVELTY Uncurled ostrich feathers of an orange hue have been found effective in making floor-lamp shades, to harmonize with cer- tain schemes of interior decorating. They shield the eyes from the direct rays, dif- fuse a pleasant glow and can be made in much less time than is required for those of silk or other fabric. PAPER MONEY TO BE SMALLER FOR LONGER WEAR Easier to count and handle, the smaller sizes of paper money proposed for circu- lation in the near future will save the gov- ernment about $4,000,000 a year, and as the bills will many times, have to be folded so it is expected they will last They will be “greenbacks,” much harder to counterfeit than the yellow notes, as they will be printed in dull green and brown colors that defy accurate re- production under a camera. At present, there are five kinds of $10 bills. In the new there will be but one of this denomination and of all others not longer. series , a distine- MECHANICS tive design being chosen for each. It planned to drop the $2, $500, $1,000, $5,000 and $10,000 issues. six inches The new ones will be long and two and one-hali inches wide, the dimensions of Philippin: currency, which has been in circulatio there for twenty-five years. DRESSING IN GRASS Nettles are usually associated with un- pleasant sensations, but a species of the plant is widely cultivated in China for the manufacture of a soft silklike fabric for textile purposes. In strength, beauty and texture it is said to compare favorably with the finest grades of silk and is less costly. The “grass cloth” of China has been used for more than 4,000 years. Pine apple fiber is also employed in the manu facture of fabric for handkerchiefs and other articles. EXTENSION DRAFTING TABLE FOR BIG SIGNS Show cards but a few feet square as well as large signs may be painted on an ad justable table which rises or lowers, ti to different angles and is light enough fo: easy carrying. It may be made as small a two by four feet, as high as seven feet and of almost indefinite length, depending upon the number of units employed. The part are held together by bolts and screw which are quickly inserted or taken out. Table as It Appears When Closed; for Larger Signs I May Be “Stretched” Out to Great Length

Page 53

POPULAR MECHANICS 929 R LINER BUILDING FOR TRIPS ACROSS CONTINENT ramework of the Dirigible under Construction; Duralumin Is the Main Material and the Ship Is to Employ a “Vacuum” Principle of Propulsion Instead of the Usual Propellers Round trips between the Pacific and bines will be used for lantic coasts can be made in three days +} motive power and it believed the load-carrying capacity will 1a new type of dirigible, its inventor make long trips practical. lieves. In construction, it is much like her ships of its kind, the chief difference lo ' igri aa pre Ae te; | AUTO WINDSHIELD KEPT CLEAR ; in ¢ l€ . ethos oi propu sion. ; n- WITH CHEMICAL WIPER ead of boring through the air, it is sipped with a blower which is said to Easily attached to any windshield take most of the air from the nose of the automatic or hand-operated, a special lirigible, creating a partial vacuum. The blade spreads a chemical which is said to is then discharged at right angles to clear the glass of moisture he surface of the hip at high veloc- , thus on account the shape of the ivelope provid- ng a propulsive lorce. The craft is to be 400 feet long and somewhat lighter than exist- ng dirigibles of its serves to distribute ize. Steam tur- Chemical Blade for the Windshield Wiper, and Draw- the chemical. ing Illustrating Its Efficiency W ipet . and keep it so for several hours without the neces- sity of constant rep etition. The blade can be put on with a screwdriver and has two layers, one of rubber to scrape off the dirt and felt section which

Page 54

POPULAR MECHANICS Each building wil constructed in a re dug in a hillside, with 1 earth banked agai: three side walls, lea, only the front open, ; it will be covered by earth barricade a few in front of it. All ste used in construction \ be joined together to pre vent sparks jumping f: one piece to anothe: struck by lightning. QUICK REPLANTING SAVES UPROOTED SHADE TREES Many beautiful sh trees, uprooted each v« by storms, are cut up a carted away when thx might be replanted SIX RUM-CHASING AIRPLANES saved if given fairly prompt attenti HAVE MACHINE GUNS After the hurricane in Cuba last fall, tre: were “salvaged” in this manner and, wit Airplanes equipped with Lewis machine in a month, had sprouted new leaves a: guns have been added to the regular rum- were prospering. It is thought that Rum-Chaser Airplane Equipped with Lewis Machine Gun; the Craft Can Travel through the Air or on Water chasing fleet to prevent smuggling. They traces of the wind’s damage will have d can travel in air or on water. appeared within a few years. The t1 - is trimmed back and braced with props NAVY TO BURY ITS EXPLOSIVES many instances, to support it while t new roots are forming, and it is often ne TO AVOID DANGER essary to supply fresh earth. Crews wit Artificial caves, built into the sides of derricks and other hoisting apparatus c hills, will be used in the future by the handle large trees with comparative ea navy department for the storage of ammunition as one means of prevent- B oe . : ing another disaster like that which wiped out the Lake Denmark depot last year. The caves will em body all the lessons learned in past explo- oh) teuptereeer dota |} epee sions, and when the sys- tem is installed, ordnance experts believe that it will be impossible for a fire starting in one building to communicate the ex- plosion to others. The first ammunition depot of the new type is to be in- cetalled ; 4 ES r. Large Tree, Partly Uprooted by Hurricane in Cuba, Was Saved by Qui stalled at Yorktown, Va. Resinating and Trimming

Page 55

POPULAR MECHANICS LECTRIC QUESTIONNAIRE SPEEDS PUPILS’ Pupils Taking Test by the “Electric Questionnaire” ; a Buzzer Is Sounded to Announce When the Time Al- lowed for Answering Each Question Is Up a4 ertness and quickness in answering tions are said.to be developed in pu- through the use of an electric buzzer pecial sets of test questions and an- ers, covering a variety of subjects. After question is announced, a reasonable time llowed for writing the answer, then the her plugs in the buzzer, which signals it the time limit is up. Papers are ex- nged and the pupils correct each her's, according to the answers. USE ICE TO LOWER CONCRETE FOR BANDSTAND FLOOR Sunshine and ice were utilized by engi ers in Florida in lowering a sixteen-ton crete slab which forms the floor of a Istand at a municipal pier. Screw could not be used, as it would have een impossible to remove them after the nerete was in place, and the difficulty further increased by the fact that the rk had to be done in an exceedingly rrow space. The floor was to be lowered rhteen inches. It was first elevated two t, then thirty-two fiftv-pound cakes of were fitted under it as supports. The ks were then removed and while sun- shine melted the ice, engineers removed the two-foot props and substituted six- inch blocks. Men with long-handled mops took care of the water that formed, and the job was completed in sixteen hours. TRAPDOOR ASH TRAY IS CLEAN AND HAS LARGE CAPACITY Ashes are kept from lowing about and 1 unpleasant odors are eliminat doot yeeps cigaret from a smaller cess into the | container below where they are securely held for later re- moval The bowl or main ash receptacle is large enough to make daily emptying unnecessary The tray, also is provided with a bracket for a match box and sup ports for cigars

Page 56

HOST stories are being bought and sold in the London real-estate market as a result of the discovery that old castles with spooky reputations are preferred by buyers, particularly wealthy Americans. Not that the purchasers believe in ghosts, but there is something about owning a home with a tradition of being haunted that makes it worth thousands more, in the estimation of many purchasers. England is well supplied with good ghost stories, and the list is constantly being added to, largely, it is believed, because. candles are still extensively used for illumination and the dim light of a candle is very favorable, according to scientists, for producing the condition that 932 leads to seeing thi: that aren't there. Ghosts have always | one drawback from t standpoint of careful vestigation—they usually seen by peo; who don’t want to them, and almost neve: by persons who go lo: ing for them. There : simple explanation that, and for the gho that are heard as well those that are seen. T! visible ghosts, scienti! investigators declare, « ist only in the eye of t beholder, and the au ble ones in his ear. Everybody, even th who have never claim: to have seen a ghost, | lain awake at night heard queer sounds, normally loud, eve: though they would ha been inaudible to anyo: else, because they exist: only in the hearer’s 0\ ear. The sounds we: made by blood pulsi: through the veins of the ear. Picked up the eardrum, which amplifies them just a radio receiver amplifies an incomi signal, the ear sounds, heard in moment of apprehension or nervousness, can eas be imagined to be the stealthy steps o burglar or the movements of a m ghostly visitor, particularly if one is sle ing in a centuries-old castle well supp! with ghostly legends. As for the ghosts that are seen, th are classified medically as Purkinje imag: or Sanson specters, both named after th discoverers, and it is in seeing them t! the weak light from a candle plays such important part. Purkinje discovered t! under certain conditions the blood vesse

Page 57

sbout GHOS retina, that film at the back of the hich is directly connected with the leading to the brain and which really he image focused on it by the eve could produce images of its own. To it, though, a dim light is necessary, right illumination furnishes so much that the blood vessels do not shadowy reflections. It is as when meets an approaching automobile at If the car has bright lights on, flood of light blinds the eye, whereas - dimmers are turned on, the retina is to distinguish all the details of the cast lway clearly. ke the Purkinje image, the ter is produced within the eye, either Sanson he front surface of the cornea, which the front of the eyeball, or on either front or back surfaces of the crystal- lens, a convex lens like that in a cam- vhich focuses the image on the retina. en you look through a street-car win- under certain light conditions, you not v see the passing buildings outside, but ‘wise images of the people behind you, he opposite side of the formed on the Sanson specters are buildings on t et, the oe ow images being The ething of the same sort, tiny images, lly badly blurred, of things which t one side, out of the direct line of n. But the optical ed to placing things they see by their olass. nerves, accus- and relation to other objects, trans- a message to the brain saving that e blurred specters are ahead, and, like images on look right through them and see solid jects behind. (riven a dim candle flame and a condi- n of even indi- tion, it isn’t hard to imagine that you he street-car window, you nervousness, grief, or seeing images of ghostly figures, partic- rly as they appear to be almost trans- rent, and and shift position as u move. We Dr. .Frederick raves, an English scientist, “that ghosts move know now,” says The Front Surface of the Cornea, Marked A, the Front and Rear Surfaces of the Crystalline Lens, B, and the Blood Vessels of Retina, C, Are Three Places Where the Eye May Create Ghost Images yconscious Certain ab- are mostly figments of the sul mind that gives us dreams. normal states, as when toxic matters linger in the system, produce visions readily; even from of diet, a person have startling revelations. “That unconscious that bers not and, when unfettered by the will of the conscious mind. c errors May 1 4 1 eiemen Situm- an act bv itselt as inhypnotism, somnambulism, automatic for walking and writing, accounts many queer things. Those myriad cells on the verge of the gray matter of the cerebrum are always storing impressions, and | now and then throw the out, surplus often jumbled together and wildly distorted, as ina nightmare. There are two sides to the brain, and there have been many Jekylls and Hydes in real life.” But despite the scientific laving of th e whole ghost story, specters remain pop 933

Page 58

934 ular, may be because, as science has dis- covered, even a “creepy” feeling can be highly agreeable. To satisfy that desire, the Martin part of the Tower of London was recently opened to the public, largely because it has a satisfactory ghost story connected with a one-time keeper of the crown jewels, who made his home there. On a Sunday night in October, the keeper of the jewels and his wife were seated at supper when a pale figure, like a glass tube filled with a dense white and blue fluid, emerged from the wall, floated across the room and started to seize the frightened woman, when husband heaved his chair at it, and the ghost promptly disappeared. A short time later a sentry at the tower door saw a her gray, shapeless thing approaching, challenged, and then lunged with his bayonet, follow- ing which he fainted and was found un- conscious by the officer of the guard. He escaped court-martial for sleeping at his post when an officer in a near-by room reported hearing the challenge. So the government opened the tower to visiting Americans looking for -ghosts. The old Tower of London, where kings and queens and lesser folk were impris- oned, has more than its share of ghost stories. There are rooms where, on dark nights, weeping is heard. There are stories of the rustling of ghostly silks, as royal ladies flit over the cold stone floors. There Eridge Castle, Home of Lord Henry Neville, Which Boasts the Ghost of a Young Girl Who Pined Away after Being Imprisoned in the Main Turret by a Bold Bad Baron of the Middle Ages POPULAR MECHANICS is a tale of an officer of the guard y climbed a ladder to peer through the \ dow of an empty Norman chapel to vestigate a ghostly light and saw a six so terrible he never told what it was. 17 last is a not uncommon added touch number of ghost stories. While the ordinary ghost stories— tims of bold bad barons and the dangerou dukes of the Middle Ages—are quoted in the real-estate market at t! sands each, there is one specter in Eng! that probably would be worth a mil if his home should be placed on sale. is the royal ghost of Buckingham pala the town castle of the king and queer 1 in London. According to legend, being spirit of the mad king, George III, haunt the corridors of Buckingham of nig Up and down the red-plush-draped co dor at one end of the royal home, in out among the gilded chairs, the gho king is said to pace, pausing before long windows to look out at the dan shadows of the trees, a spectacle that ways fascinated him in his lifetime. Ghosts of men and women who app: and disappear silently or pause to rattl chains and exhale eroans are more monplace in the ghostly tremend: legends, Windsor castle has a real nove in the story of a pack of gho deer hounds that, according people who claim to have hea: them, bay with as musical a n or less co

Page 59

POPULAR MECHANICS Hurstmonceaux Castle, Deserted, Boarded Up and Headed tor Ruin, But with Its Legends of Ghostly Inhab- a itants in the Long Echoing Corridors Still Keeping Vandals Away hey ever uttered in real life. To make thing complete, the spectral hounds, tead of chasing the live deer in the it Windsor forest park, have ghostly rev, too, and are guided by a ghostly hunter. The legends that a royal ntsman named Herne, dismissed from post, hanged himself in an oak that afterward known as Herne’s say oak. hen by mistake, the mad king, George he whose restless spirit is said to walk kingham palace halls at night, ordered oak cut down in 1793, whereupon rne the Hunter came back to haunt the ce and brought his hounds along. \s recently as last October, the specter k was reported chasing the ghostly the park. The [ mer, living at the edge of the royal pre- rves, heard the old clock at Windsor trike midnight—the favorite moment for ll ghost stories—and then heard the bay- of the distant hounds hot on the hostly scent of their non-existent quarry. (nd, the Oo weeks later, across wife ot a farmer's wife, again at thing. relates “exactly midnight, I My daughter eard the same knocked at the door and asked, ‘do you ear them ?’ Not having spoken to her my first experience I said, ‘hear what?’ ley must have been Herne the Hunter’s unds,’ she replied.” } Waldorf Astor, one-time American but now English, recently acquired the ghost legend of no less a person than Anne Boleyn, wife of Henry VIII, when he bought romantic Hever castle, in Kent Under the frowning walls of the old stone pile flows the river Eden, spanned |! bridge across which, at each Christmastide, Va elides the alleged vhost of the lady who lost her head in the Tower of London. Hampton court, built by Cardinal Wol sey, is reported to be haunted by two queens and a prince of the church in the ghostly persons of Queen Jane Seymou and Queen Catherine Howard, two more of the eighth Henry’s wives, dinal himself, who died after being stripped and the car- of his power by his king. For Hampton court legends, a spinning wheel was heard at night though no wheel could several vears, according the The noise seemed to come from ott « al ° be found. behind a dead yw broken through, so, recently it was and there was the wheel, covered with the dust of several centuries. An old plan of the castle showed this had once been the private apartment of unfor- tunate Queen Jane. Two women, both royal pensioners liv- ing in the castle, claimed they met Queen Catherine one night standing by the great staircase wringing her hands and sobbing

Page 60

POPULAR MECHANICS piteously, and her screams, they say, are often heard. Search of history discloses that the queen was sitting near the stair- way some 400 years ago when she heard ALMOST TOTALLY DEAF HEAR WITH SOUND AMPLIFIER Persons with but twelve per cent of the normal capacity for hearing are said to distinguish sounds through an amplifying apparatus recently demonstrated in New Aid for the Extremely Hard of Hearing; the Amplifying Cabinet and Attachments Ruins of an Ancient Scottish Keep on Wild Loch Aber, Still Said to Be Frequented by the Spirit of a Pictis! Warrior Who Was Killed There in Battle Nearly 2,000 Years Ago the king had decreed her death. She tempted to rush to his presence, but wv dragged back, screaming, by the men « the royal guard. York city. It is intended for perman: installation, not as a portable outfit, a1 picks up noises in any part of a room wit! such great amplification that an almo totally deaf person can hear them. TI equipment is provided with vacuum tube ear phones, microphone and other radi It is designed especially for use in the home or office. devices. HUMAN HAIR OPERATES FOG GUN IN LIGHTHOUSE TOWER How a human has been adjusted to fire a fog gun whet slender ribbon of ha ever the mists endanger shipping, is on of the romances of engineering. This 11 light coast ¢ Antioch southeast Hair absorbs moisture and, wu der tension, will lengthen slightly whe stallation is found in the house tower on the France. the atmosphere has a high degree of hu midity. This is the principle which | been harnessed for saving of human live When fogs arise, the hair ribbon, abo eight inches long and composed of || individual hairs, close an electric circuit which, in turn, fire the gun at the rate of two flashes a minute The explosions are made by igniting a mix ture of acetylene gas and air. Sufficient “ammunition” is provided tor 300 hour of continuous firing. Building the towet stretches sufficiently t

Page 61

POPULAR MECHANICS an engineering accomplishment in it- Its foundation reaches six and one- th feet below the low-water line and work could be carried on only a few rs each day; in all, forty or fifty times ing the months from July to October ‘n shallow boats could reach the site. fog gun fired by the “hair trigger” ; installed last fall and has worked sat- : ctorily since. GROWING FROGS FOR FOOD Bullfrogs at $48 a pair and tadpoles for- eight cents each—such prices are re- rted common in Japan where frog rais- recently has become a popular indus- since the legs have been in demand food. Frogs have been purchased in re quantities from the United States d, since 1922, the imperial university of kyo has been working in co-operation th bodies here to promote frog culture. e common bullfrog is the one popular- food. It grows to about eight hes in size, has the power to change lor and spends two winters as a tadpole, ching its full growth at seven years. l as AUTO-TRUCK TANK FOR TROUT SAVES HANDLING CANS lransporting live trout from the hatch- to the streams has been simplified by Idaho man by means of a special tank a one-ton motor truck. It will carry many fish as could be contained in sixty saves bothering with the separate ntainers and is emptied directly into the eam simply by pouring the contents rough an extension at the rear. The ik has an aerator 937 ROTOR IS HARNESSED TO PUMP AS WINDMILL SUBSTITUTE Rotor Windmill Rigged to Pump, near Berlin, as Sub- stitute for the Ordinary Wheel Successful adaptation of Flettner’s ro- tor, the novel method of ship propulsion, to pumping is reported from Berlin. The rotor, mounted on a tower in place of a windmill, was rigged to operate a pump. TREATING CREAM WITH LIME TO IMPROVE BUTTER The use of lime to reduce acidity in cream for making butter was discussed re- cently by Prof. O. R. Overman, of the Uni- versity of Illinois. The treatment, he says, prevents excessive emergency use, ice hoppers, h containing 100 and holds ) gallons of water. have been de- ered in it as far 300 miles in a gle day’s drive (| were in as good ndition when they tered the stream unds, fat which result from churning cream that had been teurized while very loss of would pas- sour; eliminates un- desirable flavors, and produces butter that The use of a neutralizer of the acid also gives a keeps longer. lime as when taken from small additional e hatchery. Discharging the Live Trout Directly from Auto-Truck Tank; No Cans Need Be Handled food value.

Page 62

938 POPULAR MECHANICS PHONOGRAPH CHANGES DISKS AND PLAYS FOR HOUR An hour of music without bothering to change the records by hand en- automatic phonograph, which is fitted with a magazine that holds twelve disk records, can be joyved from an and shifts each when it has been played and puts on the next one. With this convenience, whole sym- phonies may be reproduced and special programs of dance or instrumental music. The apparatus is electrically operated. Re- moval of records is accomplished by a me- chanical “hand” which tilts the completed disk off the turntable into a velvet-lined receiving drawer, takes off the next one from the magazine and deposits it in play- ing position. The tonearm swings to per- mit both movements. When the last rec- RUBBER LUMBER FOR AIRCRAFT SUBSTITUTE FOR WOOD Numerous points of superiority are claimed for a rubber lumber which is in- tended to replace wood, metal and other materials in many uses. Its strength and light- ness commend it for aircraft construc- tion, but it is suited for other well. various purposes as Cross Section of a Rubber Fabric May Be Replaced by One of Metal if Desired Mai tae Automatic Phonograph, Showing Receiving Drawer for Played Records; at Left, Pressing the Reject Button, and, Below, Steps in Changing Records ord has been completed, the motor is off automatically. By pressing a “reject button, any record may be ejected tr the turntable at any desired point in t! music, and the instrument may be stoppe at any time or operated without the aut matic feature when single records are be played. The magazine is adapted ten-inch or twelve-inch disks, but the t cannot be mixed. Outwardly it resembles ordinary hard ru! ber, but in reality it is quite different. I! central portion consists of hard spon rubber with minute air spaces. On ea side of the core is a layer of denser rubber compound, and tl! external surface consists of stron fabric cured as unit with the sectio: on which it If desired, the fab: may be replaced b metal, such as du ralumin,and may rest ‘Board’; Outer Layer of

Page 63

POPULAR MECHANICS oplied on one or both sides of the rubber ird. Tests have shown that the ma- rial is stronger than wood, can be irked up into different shapes, does not lit, can be softened under high temper- ures and loses none of its strength when oled. Its natural flexibility enables it withstand great strain, such as encoun- red in an airplane. It does not absorb oisture, resists corrosive action, and, en used in water, barnacles are said tt to settle upon it as readily as upon sod. At the present time, the cost of e rubber lumber is considerably higher an corresponding sizes of wood, but this awback is expected to be eliminated hen production reaches a large volume. PORTABLE FURNACE-TEST SET REDUCES FUEL LOSS For rapid and accurate analysis of com- istion conditions in furnace fires and the cation of boiler troubles, a portable test- ng outfit is intended to aid the service in and engineer. It includes instru- ents for telling what kind and propor- ns of gases are going up the flues, tem- eratures of the gases, and a draft gauge it shows if the fire is receiving the roper amount of air. Accurate regula- tion of dampers, reduction of stack losses nd location of leaky settings, broken baf- , and other troubles, are possible with e testing outfit. The case can easily be ipped into an automobile or underneath train seat, weighs less than twenty Testing Set Attached to Furnace for Measuring Gases, to Show How Fuel Is Being Consumed pounds with all instruments, and there is om for extra tools and overalls. | rs 2 RO . L & & be c iF 7 a aV ees, ; ~ Another Triumph for Concrete Construction, Huge Mine-Hoist House in Holland CONCRETE MINE-HOIST HOUSE INSURES RIGIDITY In order to have a more rigid structure. reinforced concrete was chosen for the material in a hoisting house at the pithead of a mine in Holland. It is 179 feet high, and more than 340 tons of steel rods, plates and iron were used in the building. PLANTS GROW IN NIGHT With the aid of special measuring ap- paratus, Prof. F. M. Andrews of Indiana university has found that the stalks of some plants grow more in the night than they do in the day. The leaves showed as much development in the light as they did when the sun was down. @ Nearly a third of the homes in the United States are without bathtubs, ac cording to a survey.

Page 64

40 POPULAR VERY CA POLISHED PACE SHAVED PANTS a ~LEAN PRESSED LEGGINGS POLISHED MECHANICS | Personal-Appearance Mirror for Bus Employes; tion Is Called to Details Often Overlooked MIRROR FOR BUS CONDUCTORS CHECKS DRESS POINTERS Atten- Recognizing the importance of neatness in the personal appearance of its employes a motor-coach company has adapted a lettered, full-length mirror for the special use Of its men. Attention is called to such details as clean collars, polish legging ed shoes and s, pressed uniform and a shave, so that conductors and others, by checking their reflection with the “gauge,” can tell ata glance if they measure up to standard. The plan saves time and enables each man to act as his own “inspector.” LIVE IN A CAVE FOR TWO YEARS TO STUDY THE SUN - Housed in quarters arranged in a nat- ural cave on the rim of a mountain in southwest Africa, two observers for the Smithsonian institution have started a vigil to delve deeper into the secrets of the sun. A principal object of the investigation is to gain further data as to the relationship between the sun’ variation and the weather. The observa- tory is the third established in connectio1 with the Smithsonian’s study of solar ra- diation, two-years’ and the location was selected be- cause of the high altitude and consequent decrease of error due to atmospheric losses, freedom from clouds and the wide distance from other stations, far separa- tion being necessary in entirely independent other stations are located at tain, Calif., and their diversion, along a order to obtai: observations. The Table Moun- Montezuma, Chile. For the observers have take large supply of phonograph rec ords and will also do some hunting. CORK PULLER STOPS BREAKING AND REMOVES CAPS : Corks are lifted out of bottles with ea and safety, and without stopper, by the aid of an all-metal puller which has three long spikes. These are driven into the cork, the top is given a gen- tle twist and the cork comes out complete and un- damaging th damaged. The bottle is not | jerked or pulled, FOR Lage! so that thereis | > ~ little danger of | spilling the con- bie SMALL tents. Broad (os heads on the FOR MILK spikes keep them —" from falling out of the puller which also has a curved notch for pryin off caps. To remove milk-bottle cap one of the spikes can be used.

Page 65

ji: eget od OP pte 96. 4 . : . — = SS EE SRN S Vs SSRs Se : ES SAT DRS Go TREE Se ane TREE A SE urging a Peppermint Still on an American Farm with a Load of Mint Hay; a Canvas over the Wagon Bed Catches Every Leaf Broken off the Stems in Transit, So There Is No Waste Bringing a Japanese Industry to America Healing Mint Is Successfully Raised for Menthol in Latest Farming Venture in California By H. SIBLEY a many years Japan has produced riety has a high menthol content—some- the bulk of the world’s supply of men- times as much as seventy per cent. which is made from the oil of the In spite of the vastly superior and ef- tive peppermint. ficient American methods of cultivation \lthough America is one of the largest and distillation, and the greater yield per nsumers of menthol for use in healing acre, Japan is still a serious competitor es, cough drops and similar prepara- because the low labor cost is in her favor. it is only within the past year that In Japan, over three-fourths of all the nese oil has been produced on any- mint is grown on the northern island of g like a commercial scale here. Hokkaido, where only one crop is possible reliminary experiments in Californi a year. Here three crops have been raised re so successful that considerable acre- and each has vielded more crude oil than has been planted to the imported mint, the corresponding acreage in Japan. |! a number of large stills have been Japanese methods present a strange con- in operation. It has also-been grown trast to the American way. When it is in Indiana, Michigan and North Carolina, blossom, the harvesters—usually girls—cut well as in Oregon. The Japanese mint the plant with a curve-bladed knife, simi- st not be confused with the American lar to the old-fashioned mid-west corn- ck-stem mint, raised so extensively in stalk cutter. The plants are cut three or diana and Michigan. The Japanese va- four inches from the ground, and then 941

Page 66

POPULAR MECHANICS

who in most cases have co: tracted for it at the time of pla: ing, and have advanced the far: ers money for living expenses. Some interesting experiment have been made with the e hausted charges of mint hay after it has been distilled. For a time its disposal was a problem, fo: could not conveniently be plowed under for fertilizer because of the long, tough stems. accident it discovered that live stock eat it readily—sheep in particular. like it, but it has not proved a good diet for milk production. Horses eat it greedily, and at least one tean However, Was Cows

Japanese Peppermint at Harvest Time; the California Variety Is Much More Heavily Leaved, Yielding More Oil hung, upside down, on a rack. This ts much like a fence with a narrow thatched roof. Here the mint is cured, a process which in that humid climate requires about four weeks. In California it is cut with a horse-drawn mower and cured in wind rows in about thirty-six hours. It is then picked up in the morning while the dew is still on it, preventing the leaves from shattering off. The Japanese still is more primitive than a moonshiner’s outfit. It consists of a wooden tub over a shallow iron pan, and has a removable lid which is held as nearly steam-tight as possible by cords. <A cop- per pipe carries off the oil-laden steam through a coil condenser submerged in a tall wooden tank. The water in the tank is replenished by hand, with a bamboo bucket. Dried bean straw, leaves and twigs constitute the only fuel, and it is necessary to fire all day and night to dis- till a single charge of about eighty pounds of mint hay. vines, The average American still will run through one charge of half a ton in less than two hours. Crude oil from the condenser drips into a bucket along with the distilled water, and as the oil quickly rises to the top, it is readily skimmed off. The farmers all through Hokkaido do most of their dis- tilling in the idle winter months, produc- ing from a few pounds up to two or three hundred, according to the size of their crop. This is then taken up by brokers, which subsisted upon it almost entirely, grew fat in a few week With a bright future, the Jap anese-mint industry is the very latest thir in American farming ventures. LOCK STRIP IN CONCRETE FLOOR TO PREVENT CRACKING In place of unsightly scored joints, patented metal anchor strip for concrete floors allows compensation against crac] ing and improves the appearance of t! finished surface. It is especially adapte for use with two or more colors and flooring consisting of an aggregate crushed marble and cement, as it prevent scoring and chipping between sections. —_—

Metal Strip Being Applied to Composition Flooring; t Locking Units Are Seen at the Side

Page 67

POPULAR MECHANICS Where Each Plant Has Its Separate Greenhouse; Globe-Covered Garden in England for Producing Early Veg- etables; the “‘Bells’”” Are Easily Removed for Tending the Growth GARDEN UNDER GLASS BELLS YIELDS EARLY PRODUCE one for each nt, are used in a vegetable garden in vland. They are considered more suc- stul in respects than the usual theds, as separate plants can be given ecial care, the “bells” are easily carried out and lifted off, and no permanent tructure is needed. Bell-shaped glass covers, some TWO-BLADE WINDSHIELD WIPER CLEARS ENTIRE GLASS Driven by motor suction and controlled a switch on the dash, directly in front the driver, a double-bladed windshield iper cleans the entire glass, and, when in use, occupies a position that will interfere with the glass. The motor is in the shape of a long tube which is fastened under the visor just the width of the shield. ELECTRIC EYE TO COUNT AUTOS DOES WORK OF POLICEMAN One of the latest adaptations of the photoelectric cell is for the purpose of counting the number of automobiles that pass a given point in a day. Installed on a lamp-post on one side of the street and exposed to a light from the other, it serves as an accurate traffic reg- ister, saving the work of a special police- man, or other attendant, for the task. The counting is done as the passing automo- biles interrupt the beam of light to the cell. Their action to source of shadow causes sufficient re- operate an automatic counter, vision. The des are fixed in ertical plane and ve from side to le, the lateral ac- ‘n permitting isture to run vnward to aid in lding the shield of ow or rain. Each faithful rec- ord is thus kept for each Other uses for the cell in- clude color match- ing, sorting and a day. cigars and certain vegeta- transmitting photographs and motion pictures by bles, ide cleans half of Two-Bladed Wiper Installed, Showing How It Keeps Entire Surface of the Glass Free from Snow or Rain radio, and record- ing time signals.

Page 68

944 LAR MECHANICS tures which otherwi would go unnoticed the darkness. BUGS SAVE RANGES IN AUSTRALIA Insects from Texas a1 South America are bei: used with great succes in Australia to devo the prickly pear that fests the live-stock range A cochineal bug, a ri spider, a moth larva ai a sucking bug have bes enlisted in the warfai against the plant such good results t 1 1 the spiny growths h been reduced to a st of utter collapse, accord ing to reports. An ad tional encouraging f ture is that the insect are not likely to atta crops or other desiral vegetation. A possib! Glowing Terraces of the Night; Illuminated Upper Stories of the New Para- mount Theater Building in New York City LIGHTS ON THEATER TOWER RIVAL THOSE OF STREET Like the buildings, of the modern city t the sky. This is shown tion on the crest of the Paramount the building in New tower is floodlighted brilliance of powerful rays that emphasize the evenly back-set outlines of stories and seem to dim the signs and displays on Times Square below. Entirely aside from the viewpoint of pic- turesqueness and beauty, the instal- lation of such a light- ing system is consid- ered sound and prac- tical advertising, since it calls the attention of night crowds to the building’s fea- are reaching “ ; = Mail on Missouri Railroad; an Auto ‘ : P with Flanged Wheels Makes Prompt Deliveries most as fast, source of trouble is see in a kind of beetle th feeds on grass-eati! mealy bugs, but it is believed that, by t! time these insects are exhausted prickly pear will have been conquered no great harm will be done if the beet attacks the helpful bugs which have bee introduced to eat the plant pest. A ilar experiment, attempted in Hawaii, not wholly successful, because the insect also attacked a valuable plant. AUTO TRUCK SERVES AS TRAIN ON BRANCH RAILROAD Fitted with railv car wheels, an aut mobile truck its upon a small brat railroad in Mis to carry the mall The cost is only fraction of that quired for a stea train, and the sch ule is said to be

Page 69

!LUNGER BEATS MOTHER LOVE OF UNIVERSITY’S RATS [lunger is a more compelling motive n either mother love or the desire for ipanionship, Dr. F. A. Moss, of George shington university, discovered when made a series of tests with rats. The ctions of the rodents, he believes, fixes es that also will apply to other animals |, possibly, to man. Dr. Moss used a e built in three parts, with the center tion so wired that a rat passing through received a slight electric shock. Ten ; were placed in one end and food in other. Within seventy-two hours eight of the ten risked the shock to reach In the next experiment mother ts were installed in one section and their young in the other, but only three of the ten mothers would pass the charged wires. e food. BRANDING TORCH MARKS TIRES BATTERIES AND CUSHIONS fo identify tires with initials or mileage ecords and to stamp batteries, cushions | other accessories, a hand torch hold- ing a pint of fuel, is also equipped with a disk having ten numbers or separate letters. They become heated in a few minutes and the torch may be used steadily for any combination of numbers desired, as all are hot. Stamping a pur- chaser’s initials on tire has been found an effective way to increase trade, and the torch is well suited to such a purpose. STREET-CAR WINDOW HEATER KEEPS GLASS CLEAR Electric heaters on the sills of windows street-car vestibules have been found elrective in keeping the glass free of snow | frost, so that the motorman has a The heater occupies but all space and requires little current. clearer view. POPULAR MECHANICS 945 Looking into the Portable Plumbing Shop Which Has Space for More than 2,000 Different Articles PLUMBERS’ “PIE WAGON” CARRIES MANY TOOLS AND SUPPLIES Men from a Chicago plumbing concern are not likely to arrive on a job without the necessary tools and equipment, for they travel in autos modeled after a pie wagon with bins and shelves for than 2,000 different articles. The has seven of these cars. more firm QUICK-ACTION CIGAR LIGHTER HAS WEIGHTED BASE Occupying but small space on the counter, an elec- tric lighter for smokers has a weight in the base to prevent tip- ping over andthe element heats up almost instantly when the button on the side is pressed. It is de- signed to consume less current than the usual type.

Page 70

946 POPULAR MECHANICS To Catch the Eye of the Home Buyer; Real-Estate Sign in Los Angeles Which Emphasizes Direct-Purchase Plan IMITATION TREE STUMP USED AS REAL-ESTATE SIGN Prospective house and real-estate buy- ers in Los Angeles are attracted by an imitation stump on which is mounted a model of a cottage and an appropriate sign, erected by a dealer. The device emphasizes the idea of direct transaction from tree to finished dwelling, and is fur- ther decorated with imitation woods- men’s tools and a realistic cut as though the stump were being felled. IRIDIUM IS HARDEST METAL THALLIUM THE SOFTEST Iridium, a metal belonging to the plat- inum group and often used on the tips of fountain pens, is the hardest pure metal known, recent tests have shown. Molyb- denum is next and tungsten third. Of the common metals, nickel is the hardest, ranking fifth. The tests did not include alloys, such as those of steel with a high percentage of carbon, which rank higher than any. The tests showed t!] thallium is the softest metal, | ing twenty-fourth on the sca lead was twenty-third and twenty-second. Gold ranks number eighteen, silver fiftee: copper eleven and iron ten. PORTABLE ELECTRIC SAW SAVES MUCH TIME AND WORK With an electrically operated crosscut saw now on the market two men are said to be able to ( the work of seven or eight wit handsaws, and the outfit is adapt able to a wide range of tasks. A feature of the saw is the arrangement of the teet! These are made in links and their action is t! same as that of a rigid saw. On the cutting sick they travel toward t! motor so that they kee; the saw against the work eliminating the need “dogging” or fasteni Control is afforde through a foot switc! and the cutting direction of the teeth ca: be reversed to equalize wear and reduc: the frequency of filing. The saw operat on 220-volt alternating current from power circuit or from a portable mot generator. It is especially adapted trimming timber, cutting posts and mi: props, notching railway ties, cutting pili: and similar work. The outfit is made Link Saw in Action, Showi: How It Can Be Used for C at Angles; the Teeth Tra toward Motor on Cutting S three sizes, weighing from sixty-four 104 pounds.

Page 71

‘\[Jotor Cops? By H. H. DUNN ( ) [ where the west ends, and one state ulls $25,000,000 worth of food out of , every year, modern inshore piracy, tic on this large industry, is being ked by policemen mounted in motor- Just as deep-water fishing is one of most picturesque of all industries to the landlubber, at least—so life on the ts of the fish patrol of the California te fish and game commission compares dash and danger with the life of a is ranger or the business of being a hibition patrolman along the Canadian er. (here is a romance about the sea and Captain Bouton, Seventeen Years in the Fish Patrol, at men, some of which has been passed the Helm of His Modern Pirate Chaser n to the deputies of the fish patrol in > . seek to rob the commercial fishermen; e more than a quarter of a century oO! with outlaw fishers who use seines with meshes smaller than the law allows, and who fish during closed seasons; with fish- ermen who take in nets fish whose capture is permitted only with hook and line; with hunters who shoot ducks and existence of this water police force. deal with pirates in fast boats who geese for market, and with game- law violators of all kinds. The “beat” of the fish patrol is the whole state of California, wherever there is water deep enough to float their motorboats Jack London wrote a book about them, away back at the beginning of the twentieth century, called “Tales of the Fish Patrol,” and while few of the old-timers men- tioned in that book are still on the patrol, the modern pirates of San Francisco bay and its tribu- tary waters have so increased that the patrol is larger, stronger and busier today than it ever has been. Those who seek to prey on the fishing industry of California, and to loot its wild life, are increasing in numbers, in spite of the greater number of law violators cap- / tured every year. These are some of the facts h This Specially Designed Grappling Hook, the Game Wardens > g ’ Defeat Poachers Who Sink Their Illegal Nets to the Bottom Charles Bouton and Bert Laws,

Page 72

948 captain and crew, respectively, of the forty- foot motor patrol boat “Quinnat,” told me as we pulled away from Fishermen’s wharf and its 500 fishing boats, one warm morn- ing. Crossing the channel that leads out through the Golden Gate, I learned that “Quinnat” had been in service for seven- teen years, “without having so much as a shim removed from her bearings,” accord- ing to Laws. Forward, in “Quinnat’s” heavy but capa- cious hull, were quarters for six men, but most of the space aft was taken up with the large and powerful motor, cooking accommodations, and the racks of rifles and shotguns—for not infrequently a fight with armed poachers is thrust upon the members of the patrol. Ability to shoot being one of the qualifications demanded of the deputy commissioners, however, most of the poachers, if cornered, sur- render, and the battles of ten or fifteen vears ago are becoming memories to most of the patrolmen. North by east, across San Francisco and San Pablo bays, and into the flat, shallow, reaches of Suisun bay, we held, until we were in a maze of islands, overgrown with wild rice, concealing the mouths of sloughs —the retreats of the poachers, illegal sein- POPULAR MECHANICS ers and game-law violators. Preseni|, we heard what sounded like machine-cy; fire, and out of the fog came a low, gray almost invisible craft, spreading the wate: in a wide wake of foam on either sid: she rounded to and lay alongside “Quin nat,” which Laws had brought to a In the newcomer was a middle-aged : William H. Armstrong, veteran deputy commissioner, member of the fish paty since 1901, and master of the thirty-n “Hunter,” recently added to the fleet. Armstrong and Bouton conferred for a moment; “Quinnat” moved ahead at he: maximum of twelve miles an hour, while “Hunter” lagged behind. We rounded one island, passed between two others, and heard the yammering of a fleeing motor- boat, the foam of whose wake marked the still waters of the bay. Bouton pulled three sharp blasts out of “Quinnat’s” whistle, and we held on to where w ripples yet marked the place where som: thing had been dropped into the sea We came toa stop. Laws stepped out on the bow of the patrol boat, an odd, five pronged, weighted hook, rove with a chain leader into eight or ten fathoms of line in his hand. This he dropped overboa: sinking it to the bottom, some fifteen feet Foe of the Fish and Game Poachers, the “‘Quinnat’’ Scouts the 400 Miles of San Francisco Bay Shores or the Lookout for the Bay Pirates Who Seek to Elude the Game Laws

Page 73

POPULAR MECHANICS 949 Fishermen’s Wharf at San Francisco, Before All the Fleet Had Been Motorized; the Plans for the Double- Ended Boats, with Their Queer Lateen Sails, Were Brought from Naples and Corsica n, and dragging it back and forth with perienced hand until he found what he ight, then lifting it inboard. As the came up, a brown seine came with nearly 2.000 feet. of exnensive netting, nk to the bottom with blocks of cement, se writing of ripples on the surface read instantly th the patrolmen. been and clearly by Out came gauges, and the meshes, meas- d, were found to be nearly an inch ler the legal limit, and thus capable of king small fish protected by the com- ion. Meanwhile, the whistle calls had nanswered. A long, wide-beamed but t fishing boat, half filled with striped illegally taken, came round one of islands, and, immediately behind her, puty Armstrong in “Hunter.” Leaning vard out of the cockpit, one hand on ‘wheel and the other well equipped with eavy automatic, Armstrong was run- ¢ his engine controls with his foot, the le the three men in the captured boat ved his orders. ollowed by the “Quinnat” alone, the poachers would have escaped easily, but they were no match for the thirty-miler Most of the bass were dumped back into hem swam off the bay, where many of t uninjured. A few were kept for evidence as was the net, worth at least $500, and probably actually costing amount. The larger patrol boat took the poacher in tow, twice thi after transferring her crew to her own decks, and we started back for San Francisco. Armstrong, in his rightly named “Hunter,” slipped back into the fog, to lie in wait among the islands for another pirate. Later in the day, he came in driving a large power dory, with four men, whom he had caught shooting ducks from thei boat—double since violation of the law, the duck season had closed, and there is a ban on hunting game birds from a power During December and January, last winter, “Quin nat” and “Hunter,” and the three men o1 duty with them, have taken illegal seine valued at more than $3,000, all submerged boat on any waters in California. by means of weights when their owners

Page 74

950 fled, but picked up by the specially de- signed drag with rounded hooks, which do not catch on snags, but gather the meshes of the net. By night, the patrol boats move through the sloughs and tributary bays, and around the mouths of streams emptying into the All their lights are out, and they seem to “feel” their way, never going on the banks, or meeting with accident. The patrolmen watch for the reflection of the lights on the boats of the poachers, or the sounds of their motors, and, with muffled engines, try to creep upon the law vio- lators, and to take them at work. Accord- ing to M. S. Clark, captain-in-chief of the patrol, the men on the boats know every foot of the more than 400 miles of coast line of San Francisco bay, and are fa- miliar with the sea for fifty miles outside the Golden Gate. After the poachers are captured, or the market hunters taken, with their seines and fish or their decoys and ducks, the work of the fish patrolmen has just started. Then they must deliver the lawbreakers to the nearest judge, or, if far up the bay, bay. POPULAR MECHANICS to some landside justice of the peace, a1 convince the court that the captives mu be held in sufficient bond to insure the appearance at trial. Thereafter, wh: the trial comes along, they must prese the evidence to judge or jury in such fo and in such quantity that the guilt of t arrested men is established and conviction obtained—and it is only on rare occasio: that they do fail in this. More than 5,000 commercial fisherme: operating more than 3,500 boats, are censed by the state of California, and there are some 12,500 persons employed in thy industry. The patrolmen must be sufi ciently familiar with these men and their boats not to mistake one of them for a poacher and not to interfere with the bon fide licensed fisherman going about | legitimate business. Without motorboats and other moder: mechanical equipment, the fish patr: could not succeed, and this year two o: three more speed boats are to be adde: to it. Then the buccaneers of the fishir industry of California will find the la closing still tighter upon them. AUTO-TRUCK SERVICE RECORDER REDUCES DAILY WASTE Few operators of motor trucks keep an accurate record of the actual time the ve- hicle is in service like a dial. The marker is set to corre- spond to the time of the day; the cloc! movement is wound, a chart is inserted and the gauge closed. It requires no othe: attention until the record is to be take each day, idle time, waiting, and other data, upon which to baseaclose estimate of running costs. This information is supplied by a sim- ple indicator which tells the story of the truck’s move- ments every hour of the day. It is essen- tially a clock ar- with a swinging pendulum actuated by the swaving of the ve- hicle. This action causes a sapphire point to scratch off a mark on a wax-coated card which bears the hours of the day printed in a circle rangement Attaching the Truck Serv- ice Recorder to the Cab, and, at Right, One of the Charts, Showing Time of Operation Due to tl swaying of th out. truck, the period « actual running designated by wider mark on tl! dial than the thi: line which indicate stationary interval If the motor is left running while t! truck is stopped that is shown by mark slightly nar rower than the run ning line, yet wid than the stop tra: ing. The devic may be utilized o various machines, such as looms, knittet locomotives, presses and many other uni! for keeping a record of their operations.

Page 75

POPULAR MECHANICS 951 STRUCTURE OF HAIR GIVES CLUE TO PERSON’S IDENTITY the discovery that hair is a certain of an individual's identity, scientists in additional means of detecting the nal. Examined under a microscope, is seen to have like those of fine, overlapping a fish and a canal in center, containing the coloring matter. vo persons have hair structure ex- the same, some of the chief points of tification being the size of the hair the central canal, and the scales. STEEL CABLE IN WINDY CANYON PROTECTS PEDESTRIANS one of the narrow passes on the island Oahu, H. L., e that a steel cable has been attached ie rocks to afford a handhold for tour- Before it was installed, many pedes- ns had been blown off their feet and man killed. The portion where the | attains its greatest velocity is short, rcely more than fifty vards, and as the nyon widens out beyond that, the speed much diminished. Winds at fifty and miles an hour are recorded almost at the narrowest point. Automobiles eling the motor read near by are fre- ntly damaged by the i the wind blows with such gale, which is ng enough at times to tear tops off | break windshields. inding the Windy Point Where Gales Blow Almost Constantly; Cable Gives Pedestrians Handhold Cameo Portrait Cut in Sea Shell; Twenty-Five Tools of Various Sizes Were Needed PORTRAIT-CARVING ON SHELLS LATEST ART NOVELTY Cameo portraits, cut on large sea shells, are produced by a Los Angeles craftsman who has found the work a pleasant al- though somewhat difficult hobby. The chief trouble is that the shell is very brittle, and a chip or a break at any time may ruin the entire carving. SPORT OF CRICKET FIGHTING FAVORITE IN CHINA Matches between specially trained crickets arouse as bred and much interest in China as boxing bouts do in other coun tries. The insects are weighed in on min iature scales before the battle, placed an earthenware jar if slow to fight are incited to the conflict by tickling them on the legs or head. and, Once started, the [ furious, and is often fought to a fatal conclusion. name of the victor is inscril combat becomes fast and Che ved in gold on which is presented to the Cricket 1 an ivory tablet, proud owner. fanciers take elab- 1 providing them with cool jars, artistically orate care of their pets, fashioned, in summer and fitted with tiny porcelain feed- ing dishes and clav beds. are housed in specially grown gourds and In winter, they sleep on cotton pads.

Page 76

POPULAR MECHANICS trap, the position is 1 versed and a couple gallons of water poured on the rider. MORE RISK IN PLAY THAN IN WORK You are more liable 1 injury during your hou of recreation than working periods, accori| ing to the findings of official of an eastern in- surance company. A stee! worker straddling a girder high on a building ru less risk of being hurt than when hanging a pi ture at home from tl top rung of a stepladde: The reason, this official explains, is that when man is at his occupation, he is on the alert again danger. When at pla he relaxes, thinks of othe: things and is less careft when hazard is involve From dataextending ove many years, insurance rates have been graded according to classific tions based upon the like- lihood of injury. TI classes range from 1 t the first being those the least danger and t! \ last, those exposed to tl greatest hazards. Ina dition to these, there the “FF” group or tho in extra dangerous cal TILTING BUCKET ADDS NOVELTY _ ings. Baseball players are in this divisi: TO MOTORCYCLE RACE as are soldiers during war time, aviator circus performers, acid makers, ballooni Motorcycle meets in Scotland have a and consuls to foreign countries. Poli novelty in the form of a tilting bucket men on beats are placed in class No which drenches the luckless rider who and firemen in division No. 5. Insuran springs the trap, the degree of drenching officials estimate that the automobile h depending upon the speed with which he increased accidents in America betwes passes under and gets clear. The bucket thirty-five and forty per cent in the la of water is mounted on a revolving ten years. With regard to health insu board, and is normally held upright by a ance, the doctor who is exposed to all sort weight slung underneath. When the _ of infection during his daily work, is t! motorcycle passes under it, springing the most likely to contract disease. Denti: Rider Trying to Dodge the Flood When Tilting Bucket Is Capsized in New Scottish Novelty Race

Page 77

POPULAR MECHANICS aiso poor risks and so are ministers. banker is comparatively safe. It has found that, during times of business ression, susceptibility to disease soars rdless of occupation. The age at which liability is greatest is between forty- and sixty, when the vitality of youth o longer present to throw off ailments. BEETLES SEALED IN GIANT TREE TWELVE HUNDRED YEARS hat no appreciable changes have oc- red in a species of wood-boring beetle he last 1,200 years is indicated on com- rison of live specimens with dead ones ich were recently found hermetically led in a giant Sequoia tree. The insects parently had entered the wood after it | been struck by lightning. Some failed emerge and were imprisoned by the new wth that formed over the lightning ar. The time they entered the tree was mputed by counting the annual rings it had grown outside of them. Natu- sts are not surprised that the specimens ere the same as those found alive today, r beetles are regarded as a “conservative and 1,200 years is not a long time, ecologically speaking. Species that were cred to the Egyptians have shown no rns of change in thrice that time. STREETS OF OLD ROME CLEANED BY MODERN SWEEPERS Contrasts between the old and the new plentiful in Rome, and one of the most ticeable is the Comparing Smoke from Chimney with the Testing Chart, to Determine Density DENSITY OF SMOKE IS TESTED WITH SHADED CHART How much can a chimney smoke and stay within the law? Many cities have ex- pert observers to answer the question, and one of the most efficient guides they em- ploy is a test by which the density of the smoke is gauged. It is simply a series of black lines drawn at right white background and so arranged that the observer notes different percentages of blackness when the chart is placed at a distance of fifty feet. The tester is hung on a level with the eye and in line with the chimney. By angles ‘on a odern, motor- iven street eeper, cleaning dust and dirt rom pavements it were laid in the me of the emper- One of the st popular types f brooms is iounted onan utomobile chassis. t is of the rotary ind, similar to comparing the shade of the smoke with that suggested by the most closely corresponding tion on the chart, the inspector is able to determine, with a fair degree of ac- curacy, if the anti- smoke ordinance is being observed. The areas on the are plainly marked sec- card used in this ountry. 1ose Ancient and Modern Rome in Striking Contrast; Motor Street Sweeper on Historic Highway to indicate percent age of blackness.

Page 78

RRR I ce + ay NO JNVA HIHLV 3M mO138

JO AAD) $ 3SV31390 HOI

“1338 ONY N °o ° n” rl nm “4 | Eo ig, Lo TS OS A ~~ wINIVINOD 02736 sv @3sN NOLYV? Iv IWivO eas \ UINIVLNOD O99S ONNMOYD 3JHL NO G35 e;

INI THU IF NO GISN 110d HSI4

1LIX KO8 GIONIA 1004-3Al4 ONKIION ah “ ee toon # yr ey aye ae <iq

WIM ONVid LNO $0934 HIIHM 1990 we 9 é ¥

;

iv

Page 79

POPULAR MECHANICS 95 ul 4 unting the Seeds in Sixteen Square Feet After They Have Been Released High in the Air from a Box-Kite- Carried Container; Some Seeds Were Blown Two-Thirds of a Mile Away Kites Solve Problem of Tree Seeds’ Flight Forestry Tests Imitate Nature and Disclose Extent to Which the Wind Can Aid in Reforesting Logged-Off Land Wil a box kite, a fishing reel and an ordinary pasteboard oatmeal carton, stry officials in the west question of how have solved much the wind can toward reforesting cut-over land by eading seed from standing trees. With homemade apparatus, they sent half million seeds of different species up in air to the height of an average tree | then released them to be blown away, le gauges on the kite and ground gave urate data on wind velocity. \iter the seeds had settled, the forest perts picked up all those found in meas- d areas at different distances and com- ted the general distribution. To facili- te the recovery of the seeds, they worked the snow on a wind-swept plateau with thermometer well zero. The eds were plainly visible on the white ound, but the crew suffered considera- from the intense cold. Lhe tests, which below were originated by the Pacific Northwest station, at Portland, ried out by the UV. S. co-operation with forestry officials of the forest-experiment Oreg., were car forestry service in province of British Columbia, so that the results could be applied on both sides of the international line. They discovered that a single tree left standing could dis tribute its seed as far as 3,500 feet away in a twenty-three-mile wind. The apparatus winged box used included a big kite, capable of lifting fitty The kite was let out from a reel of fine steel piano and carried aloft, attached to homemade weather the wind direction and a record its speed. pounds in a fairly strong wind. wire, tail, a vane to show wind gauge to An oatmeal carton, hung upside down beneath the kite, carried the seeds, the cover being fastened with fine thread. A stout fishing line was arranged to break the thread and release the seed. the line being payed out from an ordinary

Page 80

956 POPULAR MECHANICS fisherman's reel. Besides the seed, the box contained a lead weight, attached to a cloth streamer, so that it would drop io 4 ov Six Types of Seed Used, Red Cedar, Douglas Fir, White Pine, Yellow Pine, Noble Fir and Western Hemlock to the ground directly under the box at the moment the seeds were released, and furnish a marker from which to measure the distance to the finds. In operation, the kite was let out, and the fishline, marked with tabs at twenty- five-foot intervals, was fed out at the same time. When the tabs indicated the seed box was 200 feet above ground, the height of an average tree, the reel brake was ap- plied, the taut line broke the light thread on the box cover, and the seeds were whisked away by the wind. Seed counts were made every hundred feet down wind from the point of release, all the seeds recovered inthe space inclosed in a four-foot-square frame being counted. The tests revealed that the shape of the seed had more influence than either size or weight. Light western-hemlock seed and the comparatively heavy western white-pine seeds made the best distance records, about 4,000 feet. Besides these two varieties, seeds of the western red cedar, Douglas fir, western yellow pine, and the noble fir were used—six different varieties in all. At the start of the tests, the forestry experts believed the wind might blow the seeds from 200 to 300 feet. Ina six-and-a- half-mile wind, however, seeds were found as far as 1,800 feet away. None of the seed fell within 150 feet of the point of release, but it was discovered that the number that came down at the 150-foot mark, dropping out of the race at the start, was about the same as the number that flew 3,500 feet. Another peculiarity found was that the seeds, instcad of covering a fan-shaped area, as had been expected were distributed in an almost straight path While the experiment showed that 4 kite might be used to reseed large areas. the real purpose was to obtain informa tion to guide lumbermen in leaving occa sional trees to accomplish natural reforest ation. As the preva“ing winds at seed dropping time are known, it will be possi ble to spacethe trees* ‘+ so that their seeds may be expected to cover the entire area. SOUTH SEA MYSTERY SOLVED IN FINDING LOST IDOL - Sought for several years, the wooden image of the “shark goddess” of the Gil- bert islands, the only one in existence, has been found and is now in the posses- sion of Frank Burnett, explorer and col- lector of South sea relics. Discovery of the figure reveals a fascinating story that goes back into the centuries and has high lights of adventure and mystery like those associated with the history of lost jewels and other treasure. Briefly, the story is this the white man came, the shark natives of the is- lands in the sout! Pacific. Altar were built to and food offering: becom ‘ cautle that daughter was be lies *4 to be im cc .ld impart the same gift to others. Short.. her supplanted the old gods. At he death, her likeness was ca:ved in a bloc! of rare wood brought from the east. Th: idol was placed in a special house an: was known as the “Shark Woman.” I: Centuries before was a god to the “ade, some of the they thronged the i caches. There lived a powerful chief whose n m the st -«s and who worship 0!

Page 81

92. a British captain found it enthroned the “House of Skulls” on the island of pamama, a temple that was used by chief as a receptacle for the heads of al chieftains whom he had slain. Be- re the House of Skulls was destroyed official order, the priest who had at- nded the idol, learned of the forthcom- destruction by .ecret means, revealed e hiding place to 4 white man who had me him a favo «aid told him the fore- of its crigin. The white man is trace.’ to Australia and there Burnett und him and secured the idol. The story substantiated by the peculiar wood of hich the idol is made and by the rough irvings which indicate that it was fash- ned with crude tools made from giant lam shells, the only material the natives ad for such purposes before the Euro- eans arrived. ing story HAND STRAP HOLDS GOLF CLUB TO IMPROVE STROKE lo help correct the tendency to over- ng, slice or hook the golf ball, a hand cket strap for the club has been de- ened. Its function is to relieve the train incident to s.opping the club on the pward movement so that the fingers will ot relax their grip and allow the club- ead to drop below the left shoulder. The trap is said to insure the proper start on e downward swing, reduce soreness of nds and add distance to proves timing. wee drives, as it — lf-Club Strap in Use, Showing How It Corrects the Tendency to Make an Over-Swing POPULAR MECHANICS 957 To Be Conquered by Rails? Castle of Lichtenstein in Southern Germany, Objective of Train Line RAILWAY TO FAMOUS CASTLE TO SERVE TOURISTS Plans are on foot to construct a railway to the top of the cliff on which is perched the famous castle of southern Germany. The place is visited by hundreds of tourists vearly. Lichtenstein in WILD-LIFE REFUGE IN ALASKA TO PROTECT BEAVER Sanctuaries for wild animals have been established at Curry, Alaska, and at other points in the territory, to preserve beaver, muskrat and other creatures that are be- coming scarce. Bears, wolves and wolver- ines may be hunted within the reserva- tions, which are placed under the jurisdic- tion of the department of agriculture

Page 82

958 POPULAR SPEEDBOAT SETS NEW RECORD OF SIXTY MILES AN HOUR Previous speed records for motorboats in the 15l-class were broken recently when MECHANICS British birds and beasts, and a section de- voted to native English plants and flowers. The animals on exhibit in London will b relieved every few months and sent down to the country to get a taste of near-wild life, others, which have rested and recup erated, being sent up to take their place in the city cages. The site chosen is in a bit of “wild” country, where deer roa: Warming into a Mile-a-Minute Pace, the Motorboat “‘Angeles,’’ Champion of the 151-Class, Roaring down the Test Course; It Broke Previous Speed Records by Thirteen Miles the hydroplane “Angeles” was driven at the rate of 60.11 miles an hour over the test course on Newport bay near Los An- geles. The mark bettered by more than thirteen miles one which had been made shortly before by another craft of the same type. At the end of its spectacular performance, the “Angeles” skidded and was wrecked, but the pilot was unhurt. “JUNGLE” FOR ZOO ANIMALS PLANNED IN ENGLAND A 400-acre “jungle,” where lions, tigers, elephants and other animals will roam at will through inclosures bordered by con- cealed fences and moats, is to be built by the London zoo, at a cost of $1,000,000, in southern England. The scheme of devel- the forests, where cottages are lighted by oil lamps, and with the nearest railroad te1 miles away. SHOOTING AT MOVING PICTURES LATEST RIFLE PRACTICE Hunting game through the medium oi the movies and receiving excellent practice in skill with the rifle thereby, is one of th latest indoor sports introduced in Berli: As the pictures flash across the screen, th« marksman takes aim and fires. The in stant the bullet strikes, the film is stoppe so that the results of the shot may be ob served. The equivalent of many range and a wide variety of other factors ar realized with this apparatus, which is gait ing rapid favor in shooting galleries. opment is to cover forty years, and provision is to be made tor airplane- landing fields so that zoo visitors of the future can fly to the spot in their own planes. Planned pri- marily as a country home and “resting ground” for inmates of the London zoo, the scheme also con- templates a bird and ani- mal sanctuary to preserve Big-Game Shooting in the Rifle Gallery; Firing at Pictures of Animals on Screen; Camera Stops as Hits Are Made j

Page 83

POPULAR MECHANICS AT PATROL KEEPS CAPITOL FREE FROM MICE t the least important among the many loyes that keep the government ma- ery running, are “Mary” and “Dirty,” cats that patrol the basement and parts of the capitol in Washing- to keep it free from mice. Both is, and befriended by attaches of the ding, the cats have proved their use- ness and are now enrolled on the capitol tch. “Mary” starts her day about four ock in the afternoon by strolling forth mn the basement room where she sleeps. movements are unknown from then about five o’clock in the morning, en she appears for her breakfast of liver. ce that “Dirty” catches are proudly laid he feet of G. R. King, assistant manager the senate restaurant. Her first assign- nt was to guard the potato bins, where is locked up each night. Not long ).a cat got jammed ina ventilator shaft le following a fleeing rat. For some e, there was opposition to further use the animals, but when rats took pos- sion of valuable records stored the basement, it was decided to again list their services against the pests. some CARBON PAPER IN CUSHION BACK SAVES TIME AND WASTE To save the sten- ographer time, im- prove the quality of work and pro- long the life of the carbon binder paper, a arrange- ment with a cush- ion back has been devised. One or more sheets are stitched to it at the top, and at the ittom, they are uncoated so that the ngers will not be soiled in handling them. here is a thumb hole at the right-hand ttom edge for removing all the copies once. The cushion insures more even pressions, the copy paper is kept smooth nd in place, and the operator need not pend time in alining the separate sheets jogging them, as this is already done ith the carbons. © Keystone View Co Putting On a Roof with Hose; Cement Is Sprayed on Wire Netting Attached to Steel Framework CEMENT GUN AIDS IN BUILDING SEMICIRCULAR ROOF Uses for cement have been greatly in- creased through the method of applying it with compressed air from spray nozzles, and one of the newer developments is the hemispherical roof for dwellings and other structures. A framework of steel sheets and wire netting is first arranged, and the cement “fired” upon the mesh. When it has set, the steel forms are removed. DOLL’S HEAD THAT LIGHTS UP LATEST BATTERY NOVELTY Attached to the end of a small electric battery, a doll’s when a wire at the base is pulled. The action completes the circuit, light- ing a tiny electric lamp inside the doll’s head. The colors are shaded to appear more realistic when the light is on. face glows

Page 84

POPULAR MECHANICS To Guard Her Ears While Having a Haircut; Metal Shield That Prevents Injuries from Scissors EAR GUARD PREVENTS INJURIES WHILE HAVING HAIR BOBBED For and children, an ear pro- tector has been devised to be worn while in the barber’s chair. It guards against cuts and burns and is perforated to admit air and sound. women MEMORY TESTS FOR SQUIRRELS SHOW HOW FOOD IS FOUND Are squirrels able to remember where they hide nuts; are they guided by the sense of smell or do they just chance to find food that they or other squirrels have hidden’? Naturalists are puzzled over the question, but tests performed with a squirrel by Dr. A. Brooker Klugh, of Cor- nell university, indicate that memory plays no small part in the animal’s remarkable skill at locating food it has secreted. A red squirrel buried nine nuts in the snow on a house balcony. The next day it came and dug them up one by one, al- though a new fall of snow had complicated the problem. Dr. Klugh concluded that the performance showed the squirrel’s strong memory for location. Others were frequently observed taking the shortest route to something that had been stored. Another naturalist reports that a { squirrel, fed in a shallow box on a hou porch, was unable to find nuts that we completely buried in the sand, althou, it had no trouble in locating those t} were partly exposed. This was taken indicate that the sense of smell played only a small part in the process and tl the squirrel was at a loss to find food had not hidden itself. SPRAY WATERING OUTFIT HELPS LAWNS AND GARDENS Sprinkling newly planted gardens wit! an ordinary hose requires care, as too strong a soil. stream of water may tear the A sprinkler outfit now on the mar ket is arranged to direct a fine, even! distributed mist over tender plants or ca be used in geyser-fashion, shooting sey eral jets of water and covering a wide area. In a length of special hose are screwed a number of sprays which for: outlets for the water and different The closed one end and is held in place by bra anchor pins. The outfit may be had short or long units, depending upon tl area it is intended to serve. can be set angles. hose is Unit of Hose and Nozzle, Showing How It Is Attache and Group of Sprinklers in Action

Page 85

POPULAR MECHANICS A Glimpse of the Iron Age as It Is Expressed in the African Wilds; a Group of Natives “Cooking” Ore in Crude Clay Furnace; Charcoal Is Used for Fuel IRON-MAKING IN AFRICAN WILD REFLECTS EARLY PROCESS low more highly civilized peoples have eloped methods for transforming ore metal is seen in one of the processes by certain tribes in South Africa. natives first fashion a plate of clay pierced with holes and bake it until it is extremely hard. Iron ore and charcoal re then placed upon the plate, a charcoal fire kindled underneath and kept burning with bellows. As the ore melts and trickles lown through the holes, it passes into an- her clay container, where fire is blown on it until the smelting process is com- ete. After this, the metal is hammered to crude tools and weapons. WEATHER WHEEL TESTS PAINTS TO DETERMINE WEAR (Qualities of paints are determined in a itively short time on an electrical test- somewhat like a small Panels painted with sam- pies to be examined are attached to the rcumference of the wheel which makes complete revolution in forty-five min- ites As it turns, the surfaces rough a spray of water and then under mercury-vapor lamp which radiates ul- arrangement erris wheel. pass traviolet rays akin to sunlight. The panel then travels in front of a bank of electric lights, where it is heated, and dipped into a tank of ice-cold water. -.This cycle of conditions corresponds to those which the paint would meet under actual weather changes and, in less than an hour, it is sub- jected to wear equivalent to long service. LOCATOR FOR ELECTRIC WIRING SAVES TIME AND LABOR To insure a higher quality of work with less expenditure of time and effort in in- stalling electric boxes for outlets at the baseboard, an accurate and easily operated guide has been de- vised. It is at- tached to the top of the board by a curved lip, then tapped lightly with hammer or pliers to score the face of the wood and indicate the area which must be cut out. It is quickly adjustable to different dimensions, eliminates all guesswork and prevents cut- ting too large or too small wrong angles. apertures at

Page 86

962 POPULAR MECHANICS HOW IT LOOKS. "POLDED with the cleaner runn an effective treatment been given the content of the sack. This is to be more thorough t| eight hours of exposu in the usual way, little work and much hazard of soiling. bag can be connected any vacuum cleaner | vided with attachment and, when not us: makes a storage sack various articles, prot: ing them against mot! dampness and dust OFFICE BUILT OF CEMENT PIPE Constructed almost « an office building oi California company | proved such a succe that use of the mate: one-story houses, such milk-cooling quarte: storage sheds and li buildings for farms. 1 Airing Bag Being Attached to the Cleaner; the Drawing Shows How It Is pipe affords protecti Placed for Operation, Closed and as Moth-Proof Container THINGS EASILY AIRED INDOORS WITH VACUUM CLEANER Pillows, blankets, woolens, infants’ clothing and many other articles can be given.a thorough airing and renovating through the use of a patented attachment for the vacuum cleaner. It is simply a sanitary bag, with a hose attachment at one end and air holes and draw- strings at the other. The articles to be aired are tucked into it, then the bag is connected to the vacuum cleaner, the airing end placed at an open window against dampness, h¢ and cold, and the thick walls exclude most all sounds. Concrete irrigation pi eight inches in inside diameter, was | for the sides, with ten-inch pipe at corners. Center and corner columns w: strengthened by filling them entirely concrete and inserting reinforced st¢ The first row was set six inches below surface of the ground, eliminating a s f] arate foundatio Roof timbers we made fast by stu ding them wit nails, bent over a covered with c: ment. Joints we sealed with a ri mixture, and t! spaces under tl! 1 and in fifteen or twenty minutes, Office of Concrete Pipe; peak were board: Shortly After Photo Was =. Taken, Cement Roof Was Constructed and stuccoed. there is no risk of theft tirely of concrete pipe, } is suggested for othe: - Cc we

Page 87

POPULAR MECHANICS How Father of Waters Is Coming Back to Life | \ST year a single line of barges car- 4 ried more freight up and down the sissippi than did all the hundreds of teamboats in the old days, when small lored boys sat on the safety valves of ‘ing “floating palaces,” out to set new records for the run from New Orleans to St. Louis. \s river navigation had been practically id and gone for half a century, the per- rmance of the federal barge line, in mpetition with highly organized railroad ice, is all the more surprising. But “Father of Waters” has come back 1 transportation factor, and not only but his reawakening ‘has hardly rted, and within a few years the record be doubled or tripled. he Civil war hastened the death of the time river boats, and the World war ught steamboating back. During the 1 ila Se mud Old-Time Plantation-Landing Scene on the Big River When the Floating Palace Paused to Deliver Freight latter war, the government built fleets of barges and tugs to relieve the overbur- dened railroads in getting from sirmingham down the Warrior river to Mobile, and in handling cargo on the Mississippi. With the war and a fleet of barges on its hands, the war de- partment conceived the idea of organiz- ing a freight corporation and going into the business of that the river could compete with railroads even in times of peace. steel over, showing The barge lines of the Mississippi and Warrior rivers are the result. The one plies

Page 88

964 POPULAR MECHANICS first appeared on the river, the old-time riy; yi! men scoffed, for even with the tunnel arrance ment the draft was dee; than that of the paddle steamers. They expected the new-fangled boats to be piled up on sand bars and lost before the su mer was over—but that was five years ago, and they are still going stro: A typical tow down t river from St. Louis ave: ages as much as 16,\)0 tons of freight. The average railroad car car ries from forty to fii! tons, so it is easy to figure how many trainloads su a barge tow would make hn iA . in Nt ‘ 7) EMAL —_— Modern Steamboating with Huge Steel Barges of 2,000 Tons’ Cadacity Each and a Single Powerful Tug to Push the Fleet from St. Louis to the gulf, and the other from New Orleans around to Mobile and up the river to Birmingham. This year, a fleet of smaller craft is opening a feeder service on the upper river from St. Louis to St. Paul and Minneapolis, and other lines are to branch out up the Missouri and Arkansas, while the Ohio and the Cumberland are already organized by private companies. The modern river boats, though, bear no relation to the old-time river palaces, with their high tiers of decks, splashing side or stern paddle wheels, their brave show of white paint and gold leaf, and their crews of rollicking, chanting negro roustabouts, singing as they loaded a few bales of cotton or a drove of hogs at some plantation landing. Instead there is a fleet of as many as nine huge steel barges, each of 2,000 tons’ capacity, all roped together with huge steel hawsers, and the whole lot pushed up or down the river by a single highly ef- ficient tug. The pusher—‘“propellers” they call them on the river to distinguish them from the side and stern-wheelers—is a shallow-draft vessel, so shallow that its propeller turns in a tunnel in the bottom of the hull, the tunnel protecting it from snags and sand bars. When the propellers Most of the freight is tined for trans-shipment to ocean-going boats New Orleans, and a single load is mor than enough for any seagoing freight for even a 10,000-ton ship at sea is a ! one. Ten to twelve thousand tons load even for the biggest of the great la ore freighters, which are the most efficie: big ships known. Yet the Mississippi barges regularly h dle enough freight in a single tow to two or three average-size tramp steame! and carry it down a channel where water depth is frequently nine feet or der and where one of the most treache: streams in the world is constantly pi up new sand bars and snags and shift the old ones. They get stuck quite quently, for three rows of barges, las three abreast, make a tow some 600 long and 100 feet or so in width, all 1 pelled and maneuvered by a single puffing along behind. But when they hit a sand bar, the crew unlashes barges and one by one the tug pulls th: off, then re-forms its covey and p! away again. The crews that handle such a weight must be skilled men and qu thinkers. Many of them have good edu tions and plan to stay with the river } until they can qualify as pilots. Anyone has read Mark Twain’s story of his tr

Page 89

POPULAR MECHANICS 965 Five Giant Barges Lashed Side by Side, and Four More Ahead, Can Be Pushed 2,000 Miles against the Current in Twelve to Fifteen Days, In- cluding Stops at Numerous Landings and, Sometimes, on an Uncharted Sand Bar; at the Right Are the Cranes on the St. Louis Municipal Docks, Where Freight Is Sorted and Dropped into the Waiting Compartments of One of the 2,000-Ton Gov- ernment Barges; Below, an Express Barge, Self-Propelled, on the Warrior River Divi- sion, Plying between Birming- ham, Mobile and New Orleans S f-

Page 90

966 ing as a pilot, in his “Life on the Missis- sippi,’ has idea of what the men who guide the ships down the Father of Waters must know. The barge service is not limited to the big tows. To supplement it, there is a faster express service, handled by self- propelled barges, and carrying any sort of small-lot shipments. In a typical man- ifest, for example, there are groceries from Milwaukee, shipped by rail to St. Louis, reshipped by barge there for New Orleans, where they are transferred to a steamer for passage through the Panama canal and around to Los Angeles for final delivery— at less cost than a rail trip all the way across the continent. The privately operated ships on the Ohio, Cumberland and Monongahela bring much freight down to Cairo to be trans-shipped to the government-owned barges. The Ohio also carries big steel and coal shipments down the river. Un- der government plans, some fifty dams have been built in that river to maintain fixed depths all the way to Pittsburgh, the pool behind one dam backing up to the foot of the next. In times of high water, the dams, which are built in sections, are laid flat on the bottom, so that boats may have an unobstructed passage, and when some POPULAR MECHANICS the river falls, they are raised to retain the water, and ships pass through the locks. Illinois is working on a new barge cai to connect the Illinois river with the ( cago drainage canal, and so with La! Michigan. Locks as big as those at P ama are being built, and the federal ¢ ernment has been authorized by cong: to dredge the Illinois river itself to ope: a nine-foot channel from the great la! to the Mississippi. The locks built by the state at Starved Rock, Marseilles, Brand Road and Lockport will be big enoug! accommodate a nine-barge tow at time, and at least one will have a hig lift than any lock in the Panama cana PINS KILL MORE CHILDREN THAN GUNS The safety pin has claimed more chi dren’s lives than have guns, in the opini of an eastern physician, who declares t! the bad example, set by the mother holding pins in her mouth while dressi: the child, is responsible for many of t! disastrous results of babies swallowi: things. He has devised a special ap; ratus for the removal of safety pins fr: the child’s stomach. With the aid oi small tube, electric lighted at one end a The Type of River Boat Made Famous by the Race of the “Robert E. Lee” against the “Natchez,” in t! Days When Pine Faggots Fed the Furnace, While Small Boys Sat on the Safety Valves

Page 91

POPULAR MECHANICS 967 les for breathing, look into the or- nd with the help of ;, safety-pin closers er instruments, shut n and so simplify its tion. Such a tube, size that can be ra baby, is hardly than a straw. WHERE WAX IS MINED various parts of the | there are mines for ining a curious res- substance, a min- wax which ts used as e, with other mate- in the manufacture ax candles, phono- h records and like ar- Deposits are often ind in conjunction rock, salt and coal, vhile traces are dis- red in Austria, Rus- Roumania, Egypt, Canada and Mexico, it o far been profitably mined only from sland off the west coast of the Caspian One of the hazards of the work is t the soft wax is sometimes forced into hatts where men are engaged, due to great pressure to which it is exposed. Pasting Maps on the Globe, a Pleasant Geography Lesson; When Not in Use, the Sphere Is Drawn Up to the Ceiling PUPILS MAKE THEIR OWN GLOBE AS GEOGRAPHY AID To help pupils of a Cincinnati school gain a clear idea of the location of the different countries, their geography teach- er has them fashion their own globe ona wire frame covered with cloth. The sphere is suspended from the ceiling of the class- GUARD DROPPED OVER WHEELS PROTECTS PEDESTRIAN room by a rope and pulley. After maps So that the wheels not pass over erson or animal ick by the auto- bile, a guard is ched under the nt fender on both es of the car. It be dropped by a er’s control or le to fall auto- tically in casethe leuard is struck i person or inan- te object. Guards Lowered to Prevent Running over a Person have been drawn and studied, those of the right scale are pasted upon the globe and in a few weeks, the entire world is there. @Names and ad- dresses of manufac- turers of articles described in this magazine will be furnished free by our Bureau of In- formation.

Page 92

968 Demonstrating the Lighting Equipment Which “Plays Tricks’’ on the Eyes, Causing Things to Disappear THINGS ARE MADE INVISIBLE BY COLORED RAYS By the use of cleverly controlled rays of colored lights and a refraction screen, a Washington artist is able to make things invisible. At a demonstration, a person sitting in a chair was suddenly “dissolved from sight” while the chair remained. According to reports, the late Houdini was to have employed this system in causing an entire audience to disappear. The “magic” of the stunt is based on cer- tain light and vision, and em- phasizes the fact that our eyes are de- pendent upon light rays for what they see. laws of EYE-REST GREEN AIDS SURGERY been given additional recognition as the result Color as an aid to surgery has of research work by an eastern physician who has found that a shade of bluish- green for the operating room is best where subdued illumination is important to pre- vent glare and protect the eyes of the sur- geon. The particular has been called “eye-rest green” and already has been prepared by chemists. One reason why it was chosen is that it proved to be the correct complement to the color of blood when exposed to air. shade In the opinion of the physician, table. gowns, toweling and draperies used in the room should be of the deepest tint of the special green. POPULAR MECHANICS APES’ FAILURE TO LEARN WORDS SHOWS IMITATION LIMIT Apes have a strong t ency to imitate what see, but apparently urge to duplicate what t hear, and in this lies o1 the chief reasons scientists have been u1 to teach the animals to talk, Dr. Yerkes, of Yale univer believes. A chimpa: might be instructed to with its fingers, afte: manner of deaf per more easily than it ¢ be made to imitate sounds of human spe: Dr. Yerkes holds that sounds made by apes are not a langu at all, but, primarily, emotional exp: sions of fear, anger or other emoti which are not learned by imitation. Rober { GATE OPENED BY AUTO BUMPER CLOSES ITSELF Mounted on weighted pivots, a gate devised western invento1 easily pushed open by the automobile closes of its own accord, when the hicle has passed. An extension in center holds the gate down, until the by a Self-Closing Gate in Use; It Swings Back Upright A‘ Auto Has Passed has proceeded far enough to prev scraping the rear when the gate rises.

Page 93

POPULAR MECHANICS 9€9 NUSUAL HOME IS BUILT OF CONCRETE AND GLASS \n unusual home has just been pleted at Newport Beach in thern California. The massive nforced-concrete columns were constructed first, while he interlacing of concrete ills, floors, and great glass served. to connect the whole ructure into a single unit. All the walls re of solid concrete, nearly four inches hick, and there is no exterior or interior finish aside from the usual cement surfac- ng. Huge plate-glass windows afford an bundance of light as well as beauty. In planning this building, the architect en- leavored to use his materials in as natural way as possible. All ornamentations, curved forms, and decorations were care- ully avoided, and an entirely different con- ndows —__ Barren of Ornament and Designed for Utility, Odd Concrete Dwell- ing in California ception in building has been the result. The structure as a whole will be perfectly balanced. The furniture, lighting fixtures, doors, fireplace, and other parts of the in- terior, are carried out in the same angular construction. One piece of furniture in cludes several cloak closets, a long lounge with book and magazine racks on one side and on the other a place for the dinner table and cupboard shelves for use when serving. Every corner is utilized for some specific purpose. AIR CHAMBER IN SURFBOARD MAKES IT UNSINKABLE A surfboard that cannot be sunk, be- iuse its upper and lower decks inclose n air chamber, offers new thrills for swim- mers. As the boat will support 150 pounds hen at rest and considerably more when under way, even an ordinary outboard- motor boat is sufficient to tow it with a rider. The upper deck is concave and the lower one convex. A brass drain valve is provided to keep the air chamber dry. Although nearly seven feet long and over two feet wide, the board does not weigh more than forty pounds.

Page 94

970 POPULAR MECHANICS 7 ‘ 7 Painting and Labeling Golf Balls; the Paint Is Put On by Rolling the Ball in Hands Which Have Been Smeared with the White Preparation, No Brushes Being Used in the Process Where Millions of Golf Balls Go United States, Which Furnished the Modern Rubber-Core Ball and Newest Type Clubs, Leads World in Playing Golf —" the day in 1491 (the year before Columbus put America on the map) when an angry Scottish king issued a ban against “golfe or uther sik unprofitabill sportis,” to the recent announcement that a few of the larger American cities alone would use a million golf balls a week this summer, isa farcry. But in the last dozen or so years of those five and a fraction centuries the “Royal and Ancient” game has become as Americanized as the second generation flapper daughter of a European immigrant. To use up a million balls a week requires an army of golfers, for the modern rubber- core ball, which is a distinctly American contribution to the pastime, is good for about five games—if not sliced into the rough and never recovered. New York, manufacturers estimate, will need 200,000 balls weekly, Chicago, Boston and Phil- adelphia 150,000 each and Detroit will take another 100,000—a total of three-quarters of a million for those five cities alone. Not all of the million will be a total loss when their short life is lived, for the busi- ness of making balls has reached such pro portions and uses such a vast amount of raw material that a profitable industry has sprung up to rebuild the worn-out spheres. The heart of pure rubber may be knocked out of shape, but it is as good when the ball is discarded as when new, and can al- ways be remolded to form a new core. Besides furnishing the rubber-cored ball, America has also contributed the steel-shafted club, improved heads, and, of course, a number of winners of the sritish Open and British Amateur. The core ball, which replaced balls of solid rub- ber, was the most important, however, for it not only lasts longer, thereby lessening the expense of golfing, but it is easier on the club heads.

Page 95

POPULAR MECHANICS Golf-Ball Covers, Before They Are Applied, Look like Pancakes; Two Are Placed on Each Ball, Which Then Goes into a Mold to Be Com- pressed for the Baking Process The Test of a Ball’s Value Is the Rebound ks of New Balls ng into the Oven The Winding Machine Covers the Inner Core with Fine Rubber Thread to Build the Ball Up to Size for the Final Covering

Page 96

972 POPULAR MECHANICS <n tye Tractor Rigged to Run Small Sorghum Mill; Wheels We

re Adjusted to Describe the Right-Sized Circle about the Press, and After Motor Was Started, Tractor Needed No Attention USE TRACTOR AS POWER PLANT AT SORGHUM MILL Where only small amounts of sorghum are raised for home use, large mills and refineries are not practical, so many grow- ers have constructed horse-drawn units to crush the cane. An effective substitute for this plan was employed by an Iowa farmer, who made use of his tractor dur- ing its idle season. He adjusted the front wheels to describe a circle of the right diameter about the mill, fixed the steer- ing wheel in place with a chain and let the tractor pull the crusher instead of horses. A driver was not necessary. MAY LENGTHEN LIFE SPAN Use of a new mercury compound may result in lengthening the‘span of human life twenty-five years or more, an eastern physician believes. It is said to be the most powerful substance of its kind known to chemistry, and may be developed as a possible cure for tuberculosis, influenza and blood: poisoning. Its efficiency lies in its power to kill bacteria, and, at present, it is too strong for the blood system of a human being. Great been strides have made in the last few years in developing gold, mercury and arsenic compounds for the prevention and cure of diseases, and while some are in the experimental stage, remarkable results have been obtained. CRACKER FOR BLACK WALNUTS PREVENTS CRUSHING KERNEL One person can crack from 500 to 700 black walnuts an hour, it is said, with a strong cracker that produces the kernels in large, easily re- moved pieces in- stead of crushing them. Italsokeep: bits of shell an: dirt from the meat and will yield a pound more ker- nels to the bushe! of nuts than an ordinary cracker, the manufacturer declare. It may be used for other nuts, but is cially adapted to the tough walnut and i intended to stimulate interest in raisin and gathering this crop.

spe-

Page 97

POPULAR MECHANICS LASS AGE TO FOLLOW STEEL SCIENTISTS PREDICT civilization has through various “ages” down to the ent, which is marked by the predom- e of steel. In the opinion of some tigators, another substance is threat- the position of the metal. That is one of the most fragile of all and, recently, used chiefly for decoration illumination. Modern research has loped new qualities in glass, making more useful. A kind prepared at fheld university has enormous heat- ting powers so that water may be ed in a heavy glass pot over a gas ner without danger of breaking the tainer. In making tea, for instance, would be a great convenience as no er kettle would have to be employed. ther grade is so hard that it can be -k tremendous blows with a hammer will not break, while still another va- can be plunged alternately into cold boiling water without any sign of a k appearing. m the stone age, The material has already suggested for building purposes. PAD WALLS WITH PAPER DISKS TO STOP ECHOES Vire-covered paper 1 “sound traps” have devised by an eastern inventor as a ns of ridding building interiors of es that mar the acoustics. They can ipplied to walls while the structure is erected or to those already built. are hollow and covered with es so that they will not lose shape. eparing the Sound-Absorbing Disks for Improving Acoustics; They Are Paper Pads Covered with Wire Steeple Minus Its Church; Landmark near Delsbo, Sweden, lilustrates Type of Native Architecture OLD STEEPLE WITHOUT CHURCH UNIQUE SWEDISH LANDMARK Churches with steeples are common enough but one of the interesting sights tourists are shown near Delsbo, Sweden, is an old-fashioned steeple minus the rest of the structure and set in a landmark. of the storms of many years and is con- field as a It is well preserved in spite sidered a typical example of the character- istic belfry of the country-church archi- tecture peculiar to Sweden. LIGHT FLOATS IN MERCURY To keep it steadier during the boat’s movements, a signal lamp on a lightship at the port of Havre is floated in a mer- cury bath, held in the usual compass-type support. It illuminates the whole horizon.

Page 98

POPULAR Before the Days of “‘Luxurious’’ Shaves; a Maori Barber and Victim, Dem- onstrating How Sharp Flints Were Used to Remove Beards SHARP FLINTS USED FOR RAZOR AS IN STONE AGE Maori barbers in New Zealand demon- strated their skill at an ancient shaving custom for a motion-picture film recent- ly. For a razor, two sharp pieces of flint were used, while the “customer” plainly registered the fact that the operation was more of an ordeal than a pleasure. The practice of shaving with flints is said to have had its origin in the Stone age, more than 20,000 years ago, and was popular, even if painful, for many centuries and among various peoples. In the British museum are specimens of flints with which the Romans shaved in the classical age. AVERAGE BOY IS TALLER TODAY THAN FIFTY YEARS AGO According to research and measure- ments prepared by a Chicago physician, the average American boy of today is more than three inches taller than the lad of corresponding age fifty years ago. Figures obtained for the present generation were compared with those gathered from school /~ it, ‘é Courtesy Gaumont Co., from the New Zealand film, ‘“‘The Romance ot Hina-Moa"’ MECHANICS and other data, and the boys considered were from six to sixteen years old. Tod the average sixteen-year boy is fort) seven inches tall as against forty-three and six-tenth inches fifty vears ago. average eighteen-year-old boy today mea ures about seventy inches as compared with the sixty-seven-inch height of the b of five decades ago. t\ The factors respon- sible for the difference. in the opinion of the doctor, are better means of pre- venting diseases, knowl- edge of vitamines and the value of sunlight. VALUE OF HUMAN LIFE Every person in United States has a value of $17,500, according to estimates by the Ameri- can statistical association The total valuation of hu- man life in this country is placed at $2,000,000, 000,000, on the basis of the population, present national wealth and the probable earning power of indi- viduals. The wealth-producing capacity of the average American is set at twenty to twenty-five times his annual income, and it is believed five times the aggregate of the country’s wealth at the present time will be produced in the estimated period during which now effective human ener- gies will continue to be applied. ADDING PENCIL IS ACCURATE AND SAVES TIME Double is afforded fro: a refillable penc that has an add ing device at the upper end. It : easy to operate and accurate and rapid when the few simple instru: tions have bes learned. The ad ing mechanis! is made of met service

Page 99

Rescueg\ork Saves Fish ef " fim “%) a gal NO Ey 2 a | ¢ bs 0 Pika sett, yee Gathering Fish from Stagnant Pools in Arkansas, Where Millions Are Saved by Moving Them to Fresh Water; Spring Floods Wash the Fish into Sloughs, Which Later Become Dry By TOM SHIRAS [ YNTIL rescue work was started several years ago by the Arkansas fish and me commission, hundreds of thousands fish died annually in the summer, when shallow lakes and slashes in the tim- red lowlands of the state went dry. \ scorching-hot sun, water lines of every lough and shallow lake receding; water t, brackish, with a thick green scum on e surface, and thousands of fish milling round seeking living water, then dying these were the conditions the commis- mn found. During periods of high water, the rivers it flow out of the Ozark mountains, in e north part of the state, through the ittoms, overflow and when the water re- cedes, every depression is left full. The h go in with the flood, spawn, and both he adults and fingerlings are trapped hen the hot days of summer come. The gear used in fish-rescue work con- ists of seines, ten-gallon cans in which to transport the fish, and hardening plants. The latter are used to restore vitality, and harden the flesh which has been made soft by the stagnant hot water. The hardening process is necessary. Without going through the treatment, the fish would die in a short time. The equip- ment in these plants is very simple, con- sisting of a small gasoline engine, a pump- ing jack, four wooden barrels, eighteen tubs, and two pieces of ordinary one-inch pipe, with one-eighth inch spray holes bored every two feet. The plant is set up under temporary shelter, at a good well of fresh water as close as possible to the area in which the work is being carried on. The barrels are connected with short pieces of hose, are set on a platform, about five feet high, at the front end of the plant, and the water from the well is pumped directly into them. The pieces of one-inch pipe with the spray holes are connected to the barrels and laid on a rack down the center of the plant, the tubs being lined up beneath them, nine on two 975

Page 100

976 POPULAR MECHANICS Fish-Hardening Plant in Operation; the Tubs Are Started with Warm Water, Which Is Gradually Lowered in Temperature Until the Fish Are Restored to Full Vitality each side and each tub directly under one of the spray holes in the pipe. The over- flow from each tub passes out through a screened hole in the side near the top, and runs off on the ground. When the fish become lively, screened frames are put over the tops of the tubs to hold them. In preparing the plant to handle a batch of fish, the barrels and tubs are filled with water and allowed to stand until the tem- perature is raised to the same degree as that of the hot, stagnant water from which the fish were rescued. The water has to be tempered to avoid gill congestion, which is caused when fish with low vitality are plunged into water colder than that from which they were taken. When everything is ready, the seines are put to work, and the fish are rushed to the plant and placed in the tubs. The pump is started and the flow of water through the plant starts, continuing very slowly, so that the temperature of the water is lowered gradually. As soon as the proper temperature is reached, the full flow of the water is turned on, and is kept run- ning constantly for from twenty-four to thirty-six hours. Water used in hardening fish must be pure, and, particularly, free from iron. The commission has had some sad experi- ence in using water containing this min- eral, and every well now is tested before a plant is set up. As fast as the fish are hardened, they are placed in cans, and either hauled by truck or shipped by ex press to different points in the state where they are planted in living streams. CHIMNEY-FED INCINERATOR HAS MANY ADVANTAGES Dump your rubbish down a chimney and forget it. Such a convenience, wit! the additional requirement of an occa sional match set to the pile and re moval of uncon sumed materials every few months is now possible i1 a built-in incinet ator that replaces the unsanitary garbage can and is much simpler to use than other burners which re quire a specie! trip to the base ment wheneve! refuse is to be de posited. The chim ney is constructed at the time th: house is erected and is so arranged that there is said to be a minimum of smok: and gases during. burnings, and thoroug! Ne, = -—

Page 101

I POPULAR MECHANICS sustion is assured. As the fire is at the of the material, the heat liberates from below and these pass up igh the flames where there is a plen- supply of oxygen. No commercial s necessary to operate the incinera- By destroying stuff that often is al- d to accumulate in the basement, it creat aid to cleanliness and safety. HEAVIEST STAR IN UNIVERSE WEIGHED AT OBSERVATORY \Vhat astronomers believe to be the rhtiest mass of matter known to man just been weighed at the Yerkes ob- vatory. It is star “27” of the Great Dog ustellation and weighs 300 times as much sun. Its gravitational force is so it that if Babe Ruth attempted to hit me run there with an ordinary bat, ball would be pulled to the ground ore it had traveled a foot. Ruth him- standing on the surface of the star, weigh sixty tons and, with merely n muscles, he would be unable to lift t or his own right hand. T e GIANT MAGNET EASILY RAISES SEVENTY-FIVE TONS Work that would require many men is ormed quickly and easily with a huge net in the Krupp works at Essen. It early five feet in diameter and is le of lifting seventy-five tons. Ca- 977 FOREST-FIRE EXTINGUISHER WORN LIKE KNAPSACK oa | | bed Knapsack Fire-Fighting Outfit for Forest Rangers; It Throws a Stream Nearly Thirty Feet Putting out the forest fire while it is in the early the object of alert rangers, and one of the special units to aid in this is an extinguisher which is strapped on the back like a knapsack. It is said to be capable of throwing a small stream from twenty to thirty feet, the galvanized-iron tank holds gallon and the hose is six feet long. The force pump attached is operated by the person stages 1s five carrying the extinguisher. The outfit is especially considered the needs of the rangers who suited to often discover small fires started by careless camp- Most of these fires occur near small that a usually available for operating the extinguisher. ers and picnickers. streams, so water supply is @ Whenever you find that you to know more about any article in this wish magazine, write our Bu reau of Information. Send ting a Huge Steel Unit with Five-Foot Magnet, Seen in Center; It Saves Time of Adjusting Cables the service is entirely free. no stamps:

Page 102

“Big Bertha,” the Long-Range Gun That Shelled Paris from a Distance of Seventy-Five Miles, and a Gunne: beside One of the Sharply Pointed Mammoth Shells Used in the Cannon By HAROLD T. WILKINS rMHIS is the story of the tin fish and its brother, the metal tadpole; of the rub- ber eel and the porpoise ears, the sea buoy that concealed a cannon and its crew, the panic parties of the strange Q-boats, and some of the other secrets of the great war which now can be told. Although it is more than eight vears since the conflict ended, the carefully guarded secrets are just emerging, partic- ularly that of “Big Bertha,” the long-range gun that shelled Paris. When the advanc- ing allied armies reached the forest of St. Gobain, where “Big Bertha” had her lair, they found only the wreckage left by the Germans, who destroyed the cannon when they found it was too big to move. Pho- tographs of the wreck were taken, but un- til several pictures were smuggled out of Germany recently, the rest of the world did not know what the gun looked like in action. Big Bertha was designed to break down the morale of the defenders of Paris. When the German drive on the French capital started and pushed forward toward the Marne, only forty miles from the city, 978 the long-range gun opened fire. The Ge man idea was that the French would thi: the enemy had broken through the fr and was almost at the city’s gates, the fore the defenders were supposed to ab don everything and flee the city. The upset to the German calculati came when the first shell dropped out the sky and plunged through the roo a church. The French were sure the | had not broken, and ceive of a gun firing hind the German lines ; the explosion no one could ¢ on Paris from so, it was assu! was caused by a lb: dropped from an airplane, and before truth was learned Paris had become ured to being shelled. The big gun was an enormously c: failure, interesting in an abstract way cause of the problems its operation volved, but of no practical value. pictures recently obtained show the was fired at an elevation of forty-five grees, so that the shell, rising in an e1 mous arc, quickly would pass through miles of denser ai! and emerge into layer of five or six the earth’s surface

Page 103

I dey eale ied atmosphere it would meet with istance in its flight. ts calculate that to the neighborhood hosen mark it iry to aim the gun, latitude in which used, about a mile was ide to compensate rotation of the German engineers xceptionally clever loping their weap- m big guns to and e defensive roduced by TS were submarines, meas- allied equally |. Fortunes in developing U- which could under the surface mines that rose to a n distance from the e while were slip 1 reiease itically anchor dropped to the But a British ofhcer countered with the “tin fish” ought out the mines, snapped the cables and let them come to the ‘e, to be blown up by gun fire. e tin fish, as the called it, officially named the paravane. Like ipanion, the metal tadpole and the eel, it was based on the principles ed in making the fancifully painted tin fish used as artificial fishing bait, was from that resemblance that it name. The inventor had trolled h on Swiss lakes and got the idea the tin lures he used. In operation, of paravanes, towed at the end of cables from either plowed along sailors side of a mine well under the ce until the leading cable met the an- line of a mine. The ner anchor wire i a hs on “ , . A Rare Photograph of “Big Bertha’’ Being Fired; Note the High Angle to Send the Shell Miles above the Earth until it reached had not a powerful cut slipped along the cable the paravane, when, if it been exploded by contact, already ter snipped it through and let the mine come to the surface. The tadpole was an added improvement Towed from the bow of the mine sweeper the paravane cable led back in a long slant, so that much of it was above the the hidden The then was attached near the ship, and was level of mines. tadpole so designed that, when it was pulled for ward, it automatically descended to a cer tain depth and remained there. More brains were concentrated on beat- ing the submarine menace than any single problem of the war, and time and again they were aided by the carelessness of the U-boat commanders themselves. The safe

Page 104

980 POPULAR MECHANICS tion would be charted and the inform rushed to the American naval head ters at Brest, where Admiral Wilso: in command. Plotted on the charts reports quickly showed that the U-| lurked in a rectangle about 400 mik shore, with gaps to the eastward the French coast and to the south of coast of Spain. They never went out that area except when en route to Azores or to enter the Mediterranean One of the puzzles of the war, fro: German side. how the a knew so mucl aa about their sub German Field Rao with marine move Tandem - Bicycle - Driven ments and als Generator, and, at Right, : ‘ ety. an Electrical Device for their mine fie Locating Buried Shells Frequently with landing of the td — — in 5 oe hours iy American army in : oe a = mI er a mine field id France was largely eoest meee = 0E- due to the habit of ae oe * the submarine com- . , a oo manders of coming ott ees pe Creat to the surface at ee Pgs ee a ; uhcht t6-d06 4D ' all shipping woul their wireless aeri- ho . oe waren o als and talk with iY {*% ‘ exact Ranits. cach ether, report - answer tothe n to wireless stations °- 9 ie : ep abate gt ss at home, and josh on ,. “oan wieder singte . the French land- ‘ ws ne er. statics Gneceee. ea ey ( was rushed to What the Germans ae BS i : scene when did not know was — ; / owen that the allies had perfected radio direction-finding stations, working with loop aerials, and were able to determine the exact direction from which any radio signal heard was coming. A half dozen of these stations scattered around the British and Irish coasts and in France insured getting bearings from at least two on every German radio report —and only two are needed to fix not only the direction, but, from the point where the two lines cross on the chart, the exact position of the sending set. Night after night every submarine lurk- ing in the area between Ireland and France and Spain, where all the ship lanes of the world converge to enter the rit ~ . = ‘ i “Big Bertha’ with Barrel Lowered and Covered English channel, would give itself away Camouflage, to Deceive Prying Airmen; from A > Vj ; all; . — e the Seemingly Carelessly Placed Strings Blend C to the listening allied operators, its posi- sletity' inte the Surroundings

Page 105

POPULAR MECHANICS ted destroyed. He would nd to the wreck, enter and sly recover the submarine’s siving an accurate report on it had been doing, particu- if it had been laying mines, iso salvage the latest Ger- naval-code books from each k, so that the allies were con- tly posted on enemy codes could intercept and interpret radio messages between sub- nes and land. he diver, whose work was suded in the greatest secrecy, kept the admiralty posted on things in U-boat design and shed tips that could be in- “Titantic” disaster, and was conceived to enable liners traveling the North Atlantic to locate ice bergs by reflected sound, or underwater’ echoes. For war use, the idea was improved by sending out vibrations of such a high A Paravane and a Ship Towing a Pair of Them, Showing the White Streaks They Made as They Plowed Along under the Water allied submarines. He kept fairly well supplied with boats explore, for while the U-boats, because ' their numbers, took a heavy toll of pping, yet, because of the defensive sures developed by allied inventors, hey, in turn, paid heavily for their work. | that recalls the rubber eel, the por- ise and several other inventions, all of hich were used to locate submarines ng before even their periscopes showed. ‘lias Ries, an American inventor, gave the allies their first submarine sound de- tor, capable of picking up sounds re- lected by the hull of the U-boat and wing the direction f the porated into + from which und reflection came. It was a develop- nt of a device that grew out of the frequency that they were inaudible to the Germans, while the reflected sound transformed down to an audible pitch for the listener. The rubber eel and the porpoise were sound detectors towed astern, to keep them away from engine rumble in the ship. They worked on a different principle, with delicate mi- crophones that picked up the engine vi brations of distant submarines. When the armistice came, the allies were ready to open up a whole bag of tricks. For one thing the American army had Lewisite, more deadly than any gas used in the war, and the British had a somewhat similar compound invented by Prof. Harold Maxwell Lefroy—a gas so insidious that if it were dropped on a city the inhabitants would be unable to detect it until they dropped dying with burned Was

Page 106

98? up lungs. Nothing but a house fly has been found that can resist it. Also Amer- ican inventors had developed the radio- controlled submarine, a practical aerial torpedo, to be launched from flying ma- chines, diphenylchlorasine, a sneezing gas worse than anything used in the war, an armored triplane mounting eight machine guns, a small cannon, and dropping 3,000- pound bombs; illuminating projectiles that would light up vast areas, and a liquid poison, three drops of which were fatal. Great Britain was ready to introduce her new poison gas, which was so heavy that it could be projected against the wind without rolling back; an electric apparatus to explode ammunition dumps behind the enemy lines, flying warships, literally torpedo boats with wings, and was experimenting with death rays which showed promise of being able to bring down enemy airplanes by stopping their engines. France had a rocket to set fire to airplanes by spraying them with liquid fire, a 20.4-inch howitzer that was a bit more frightful than anything Germany produced in the way of portable big guns, and several other inventions. POPULAR MECHANICS One of the war-time mysteries that zled the Germans, was England’s Q-b the famous “hush-hush” ships. The ploits of the German raider “Moey converted merchantman which still | innocent while carrying concealed teries, suggested the idea. The Q-| were built from the slowest, most d dated old tramps available; too old t: or put up a fight, and easy picking, a; ently, for a U-boat. Jesides their innocent appearance ships were manned by men who were actors, the “panic parties” specially cl for their task. When the subm shoved its periscope above the surfa take a look at one of the waddling tramps, the panic party got busy through all the emotions of a mob scared to death preparing to abandon ship \ out waiting for its destruction. T| rushed around lowering boats while submarine came to the surface and near, ready to send off a boat to plant bomb or fire a well-placed shell from deck gun. Then, when the Germans we: almost alongside, huge false bulwar! dropped down exposing a row of | il "Mla tas — St ee hb« Ce ee “Blisters” on a Ship Hull as Protection against Torpedoes; the Big Bulges Exploded the War Head Befor It Could Touch the Real Hull and Cause a Fatal Rent in the Steel Plates

Page 107

POPULAR MECHANICS American Invention That Came Too Late for War Use, a Radio-Controlled Submarine Which Could Attack without Risking Anyone’s Life, Since It Was Operated by a Distant Ship guns. Many a submarine was sunk - slightly larger buoy, with a small cannon his way. and gun crew concealed inside, and he enemy did succeed in getting ina moored it in place of the regular one edo, it was not enough to sink the Q The buoy was arranged like a Q-boat, so , which had been specially reinforced that its sides could be dropped to pet timber and cork to keep it afloat and mit the gun to fire. One of the jealously iction until it burned almost to the guarded French war secrets was an inven- ters edge. The cork protection sug- tion to eliminate the telltale flash by which ested another war-time invention, the batteries in action could be located at ter,” which was applied to many ships. night. Research disclosed that the flash was simply a streamlined bulge all along of flame from the gun muzzle was due to hull to explode the torpedo before it a second violent explosion when the re- me in contact with the real hull. The leased carbon monoxide and methane ers slowed up the ships somewhat, gases came into contact with the oxygen t that defect has been corrected in newer intheair. M. Delpech,a French scientist, erican battleships by building the blis- found that a little vaseline added to the inside the hull instead of outside. powder charge would stop the flash, the One of the queerest stories of war-time loss of heat being compensated for by an itegy, though it was never put to prac- increase in the firing charge. test, was the gun buoy invented by Another problem of night fighting, Italians. They observed that the Aus- which Italy had some success in solving, in submarines operating inthe Mediter- arose when Italian aviators attempted to nean for some reason had a habit of bomb Austrian towns after dark. The ming to the surface near a navigation planes were invisible, but their motors toy just at dawn. The habit became so were so noisy that the enemy searchlights ular that the Italians quietly built a quickly located them. To install mufflers

Page 108

984 POPULAR to drown the sound would have decreased the efficiency of the engines too much, so device that considerable resulted, the work of a professor of acoustics in a small Italian college. Instead of tackling the problem from the engineering stand- point he considered it as one in acoustics and worked out a system of reflectors that made the sound apparently come from a spot several hundred feet away from its true source. scientists were called in. A met with success AIR POLICE FORCE IN GERMANY PROTECTS FLYERS Aerial traffic has become so heavy in Germany that a special police squad is maintained at one of the landing fields to MECHANICS help direct the aviators on departure. By arrival means of signal dey messages are relayed to the pilots an night, rockets and searchlights are ployed to guide the flyers. The corp established headquarters near Berli: CHIEF CAUSE OF AUTO MISHAPS IS “HUMAN ELEMENT” More than eighty out of every 100 a mobile accidents are due to human . lessness or lack of skill, according | recent survey of motor mishaps in | land. The investigation gave added p: that man’s ability to anticipate danger protect himself has not developed so | idly as science has developed machine: Of 443 cases involving death, less | six per cent were due to faults in vehicles, seven and one-half per cent the condition of the roads, three per ce to weather conditions, fires and sim circumstances, while the rest were attri utable to causes within the control of so: person or persons. The survey emp! sized the need for further instruction the public—both drivers and pedestrian as to the proper use of the streets. ae Copyright, Henry Miller Upper View, Airplane-Traffic Police with One of the Signal Flags; Firing a Rocket and One of the Search lights That Relays Directing Word to Pilots

Page 109

POPULAR MECHANICS 2ADIO CODE FOR MEDICAL AID AT SEA or some time, radio been used to great antage in obtaining edical aid for persons ildenly taken ill while sea, and to increase the ectiveness of this serv- e, a British surgeon has ised a code report It contains twen- nine items relating to patient and his illness. | case of a radio call for d, information could be oadeast according to s standardized list, en- tered accordingly, and an curate record kept both t the sending and receiv- ships or stations. It ludes the most impor- nt points of a diagno- would insure a com- ete summary and pre- nt useless detail. MOVIE FILMS MADE LARGER WITHOUT CUTTING REEL ik nlargements up to ost-card size are quickly ade froma motion-pic- Sketch of Proposed Labor Temple for Chicago; Would Cost $75,000,000 and Be the World's Trade-Union Center ure reel, without cutting Seventy Stories High, It ‘damaging the film in anv way, withthe SEVENTY-STORY LABOR TEMPLE d of a simple magnifier lighted from an TO COST MILLIONS ectric socket. The negative reels furnish nlargements directly on bromide paper, One of the latest skyscrapers proposed hile an enlarged negative may be taken for Chicago is a seventy-story temple of rom a positive film for duplicate prints labor under consideration by the Chicago r still greater en- rgements. The out- t consists of focus- ng mount, paper older, adjustable in ill directions, lamp nd wire connection. No serews or gears ire used in the as- embly. It is small ind easily packed in n ia is Making an Enlargement Directly from Movie Film : hotographic kit. without Cutting the Strip federation of labor as a world center of trade-union activi- ties. It would con tain offices and meet- ing halls and would cost approximately $75,000,000, accord- ing to present plans. @ The cactus plant is of American origin.

Page 110

986 POPULAR MECHANI Seq te ae 2 eS WAN = - “a Double-Cantilever Spans of the Carquinez Bridge Waiting for the Connecting Links to Be Assembled and Lifted a Li

fi/ /

( i 4 \/ 4, —- - wa >, Oo rs c/ f

\A

ee IF 28. Gin * ~~ An, >. ~>~ 19"_.2ie. “= zz 2 a Mi 4 XNX< * / dy ! a. Ld fe uv wey | ~~ into Place above the Deep Ship Channel of San Francisco Bay Sand Boxes Lift-Giant Bridge into Place

Seven Hundred and Fifty Tons of Steel to Complete World’s Longest Highway Bridge Raised High in Air by Sand IFTING an enormous steel bridge span, 125 feet in length and weighing 750 tons, to a height of 135 feet above the water with only four boxes of wet sand as a counterweight is an unusual feat re- cently successfully performed by the en- gineers erecting the Carquinez highway bridge across the upper end of San Fran- cisco bay. The bridge is the longest high- way structure in the world, though its two 1,100-foot spans are not as long as the suspension spans of the Quebec and Firth of Forth cantilever bridges, or the main suspension spans of several other similar bridges elsewhere. The final gap in the California bridge was the center section of one of the 1,100- foot cantilever close it, the 125-foot section was assembled on barges and towed to place beneath the bridge. Steel cables, rigged over enormous steel blocks suspended at the ends of the two cantilever arms, were attached to the sec- tion, and the task of filling the boxes hung spans. To

from the cables began. The sand method was chosen not only because it furnished a cheap form of power, but because the gradual loading of the boxes added bit by bit to the weight carried by the cantileve: arms, instead of forcing them to take up the entire 750-ton load at once, enabling the engineers to check the bending stresses as the weight was applied. Once the span swung free of the barge, however, it gave a good test of the extra safety allowance, for each cantilever then supported 1,500 tons, or twice the weight it will be required to carry. The balance between bridge span and sand was so care fully adjusted that the engineers regulated the lift to one foot a minute, taking 135 minutes to raise the great steel weight the same number of feet. When opened to the public, the new $8,000,000 bridge will form a link in the Pacific highway and avoid the necessity of crossing the bay by ferryboat from Vallejo to Crockert.

Page 111

POPULAR MECHANICS 987 UNIQUE ENGINEERING FEAT COMPLETES BRIDGE Four Boxes of Wet Sand Lifting the Final Span of California's New Highway Bfidge into Place; Slightly More than 750 Tons of Sand Were Used to Raise the Huge Steel Bridge Section at the Rate of One Foot a Minute for Two Hours and a Quarter CARQUINE Z Ow ras -— 469 6-1 162 —_J_499___4. —+\. —_ 459-—» 37246 _-fifll| | t~ DELAWARE RIVER me am ppDELAWARE RIV i noeegs sw tht. prrrtite: over - ian 19° @ a “en : 11736 7 . 30" _——__— - eee a =— eS ¥r, 4's Comparative Sizes of the World’s Greatest Bridges; Quebec Has the Largest in the Cantilever Class and the Delaware River at Philadelphia the Greatest Suspension Bridge, But the Carquinez Structure Leads in Over-All Length

Page 112

988 POPULAR MECHANICS GOLD RECOVERED FROM AIR Picking gold out of t] air suggests a fairy tale but that is exactly what is done at the New York assay office in Wall street Tests have shown that the method is saving the govy- ernment thousands dollars that otherwise would be wasted. The minute particles of the metal are taken from the fumes in the smelting fur- naces. High-pressure forced draft drives the gases up the stack to “settling chambers, where the gold is taken out by a special electric process before the resid fumes are released. Since the mechanism was in- stalled, itis estimated that gold to the amount of not less than $12,000 has been recovered. NOVEL VENTILATOR IS PROOF AGAINST DRAFT AND DUST Adjusted outside tl Huge Wine Cask, the Famous Heidelberg Tun during Recent Celebration; sash and equipped wit! Size Is Apparent from Human Figures closely woven copper ANCIENT WINE CASK HOLDS wire screen, which is said to keep out - FIFTY THOUSAND GALLONS eighty per cent of the dust, a window ven tilator made of heavy sheet steel has Probably the only barrel in the world — series of hooded openings that break uy that is honored with a birthday party is the direct air currents to exclude drafts the celebrated Hei- rain and snow. delberg tun in Ger- particular advantag« many, a huge wine cask now 475 years old. It is thirty-six feet long and twenty- four feet high and holds more than 50,000 gallons. It rests ina cellar under Heidelberg castleand is the central feature of a jubilee celebrated each vear. is that the window can be opened o1 closed without re moving the venti lator. The unit supplied in variou sizes to fit different requirements, and i finished in a colot that blends with al- most any scheme 0 Window Ventilator Which Permits Closing or Opening lecorati Sash While in Position and Breaks Up Direct Draft decoration.

Page 113

‘POPULAR MECHANICS SHANNON RIVER POWER PLANT TO HAVE SIX TURBINES When completed, the power plant be- installed on the Shannon river near merick, Ireland, will be larger than any it under one supervision at Niagara, it said. The six huge turbines will de- lop 240,000 horsepower. The size of the nt may be gauged by the enormous thes, one of which is shown here. It is rly sixty-six feet long and the intake Imost seventeen feet in diameter. RADIO “MAGIC” LOCATES RICHES BURIED CENTURIES AGO With the aid of a radio detector, treas- e hunters in Panama City already have und gold ornaments, chains, emeralds, tbies, diamonds and other riches which ere buried in the latter part of the seven eenth century by Sir Henry Morgan. earch is being made for other caches hich are believed to have been hidden 1 various parts of the city. The find was ade in tunnels beneath an old church. he radio apparatus is similar to those hich have been in use for some time by rospectors and ore and oil deposits. searching for The others in presence of li Immense Turbine for the Shannon River Power Plant; Entire Unit Will Develop 240,000 Horsepower metals beneath the surface is revealed by variations in signals from the detector as the radio waves strike substances offering different degrees of resistance. CHALK LINE WITH PLUMB BOB SAVES TIME AND WORK A serviceable tool for the kit is a com- bination chalk line and plumb bob, oper- ated like a tape measure and so compact that it may be car- ried in the pocket. The chalk is ried in a Ccafr- water- proot chamber and the line, which locked at required can be any length, is wound reel turned handle that out of the The bob is easily attached or taken off, being secured to the line on a by a folds way. with an eye. The chalk chamber is big enough to hold a sufficient supply for six months’ use

Page 114

— T Sink and Electric Dishwasher in One; the Washer Is at Left; Water Is Forced Up by Motor Below and Sprayed over Dishes in Rack Soap Clamp Holds Cake and Spares the Hands in All Kinds of Scrubbing; Be- low, a Combination Measuring Glass and Fruit Squeezer That Catches the Juice in a Cup Insulated Cover for Milk Bottle Prevents Freezing and Souring, and Keeps Flies Away To Keep the Heels of the Stockings from Wearing Out, Adjustable Rubber Strip Fits inside the Shoe and Is Quickly Glued On to Stay in Position dnd Anyone wishing further information on devices described in the editorial pages ¢

Page 115

your ome f Ye Clamped to Ta- ble or Other Sur- face, Vegetable Peeler Can Be Set to Cut Different Thicknesses For Storing Various Sup- plies a Set of Rust-Proof Metal Bins Save Space and Are Ventilated at the Rear; Easily Lifted Out with One Movement When et Cleaning Is Needed Double Vacuum Cup for Laundering Delicate Fabrics Is Made of Aluminum and Has Detachable Stick for Packing Seven- Bladed : Wire her seed : 4 anc 1e-Crust Why Bend Over to Use Shoe Horn? This \ we Shag Sensroves One Has a Long Handle for Sitting Upright \N = Coates and fe and Affords Powerful Leverage without SN ‘ Easily Cleaned Hurting the Fingers SN seeattieatieetii J htain it by addressing Bureau of Information, Popular Mechanics

Page 116

QO? POPULAR What the Siberian “Doctor” Wears to Frighten Spirits; Queer Costume with Its Collection of Charms MAGIC DOCTOR WEARS ODD GARB TO FRIGHTEN SPIRITS “medicine that of a junk dealer rather than a healer, for it consists of a weird collection of metals, The costume worn by the man” in northern Siberia suggests brass bells, dangling bars of copper and other articles, attached to his back. Rat- tling and shaking these things as he per- forms his rites is supposed to help fright- en away the evil “spirits” causing sickness. WHITE CARDS PROTECT HIKERS ON ROADS AT NIGHT Pedestrians are in more or less danger on automobile roads at all times and par- ticularly at night. An effective guard has MECHANICS been found in a piece of white cardboard worn or carried so that the light from ay proaching cars will strike it and attract the attention of the drivers. Small elec tric lights, white belts and illuminated hats are also available for the night hiker. COSMETICS MADE HERE TOTAL OVER HUNDRED MILLION In the last ten years, the amount of per- fumes and toilet preparations manufac- tured in the United States has multiplied six times, according to reports from thx American chemical society. The develop ment of this industry here is shown by the fact that exports are steadily increasin large quantities of goods of this kind be ing sent to China, Japan, England, and other countries. The annual output i valued at more than $140,000,000. Cream rouges and similar commodities rank fit their production aggregating $34,000,000 dentifrices are second to the amount o more than $25,000,000, and talcum and toilet powders next with a total of more than $21,000,000. The increased popularity of many kinds of cosmetics since the war is said to be the main cause of the rapid growth of the business. PUMP FOR BOTTLES SIMPLIFIES OILING AND SPRAYING For applying a wide variety of liquid directly from the bottle, a pump prevents waste and reduces work and trouble. Inserted in the container, it is held by the finger through a loop, small force and is operated by moving the bottle down and up. The liquid is forced through a nozzle which may be reg- ulated to solid pass a stream ora spray. Applying paint and varnish plants, oiling auto chinery parts, many uses. treating stationary ma are a few of the pump’ removers, and

Page 117

POPULAR MECHANICS 993 LOFTY FIRE TOWERS GUARD CANADA’S FORESTS Types of Observation Towers Used in the Canadian Forests, to. Guard against Fires: the One Illustrated in the Center Is of the Demountable-Ladder Kind for Portability lens of thousands of dollars are being pent every year in Canada to save forests. Keen-evyed men have their lookout sta- ms on lofty throughout the eavily-wooded regions and are always on e alert to discover any signs of smoke. he towers are built high above the sur- unding trees and afford the watchers a ear view in towers every direction. Some of e installations are of the inclosed-cabin pe of steel tower, offering protection rom strong winds and making it possible r the men to live right in the tower. In rder to select these wer sites to the est advantage, de- ountable observa- tion ladders are used, hich were originally evised for military urposes. This outfit in be readily loaded na small truck and Drill Hammer with Its Own Power Plant, a Gasoline Unit in Chamber Just above the Drill can be erected at any desired spot by three men ina very short time, thus doing away with unsatisfactory and costly “hit-and miss” methods of picking the sites. HAMMER MAKES ITS OWN POWER FROM GASOLINE Electric motors, compressed-air appa- ratus and other equipment are not needed in operating a portable drill hammer, just introduced, for it is provided with its own plant. This simple power consists of a mechanism moved by exploding gasoline. The entire unit is contained in a chamber just above the drill, and it is said that the ham mer will run four to five hours on a single gallon of fuel.

Page 118

994 POPULAR MECHANICS QUEER HOUSE BUILT TO FILL WEDGE-SHAPED LOT cannot be kept in tanks, for the small on are too nervous to thrive in confineme: Narrow End of the Wedge House, Floor Plan, and a Side View Showing Pleasing Appearance If you had a lot less than six feet wide at one end and sixteen feet at the other, with a total length of only sixty-five feet, you probably would not consider building a dwelling house on it. But architects in Seattle, Wash., designed a residence to fit a plot of those proportions with pleasing and practical results. The entrance to the dwelling at the narrow end is but five feet nine inches wide. SEEK TO PROLONG FISHES’ LIFE WHILE IN CAPTIVITY How certain kinds of fish that normally endure-captivity only for a brief time, can be induced to live longer, is the subject of research by directors of the proposed Shedd aquarium in Chicago. Swordfish and the grown fish a: too large. Goosefis! salt-water herring, kin fish, mackerel, a: chovies and other kin of rapidly moving fi seldom live more than week or so in captivit Fish that habitually li in darkness are also dii ficult to keep, for the injure each other seeking to hide. So { LIVING as possible, the natur surroundings in whi these nervous fish no: mally live, will be r produced in the aqu rium, in an effort t keep them longe: Water at constant te: perature, natural foo protection against di ease and efficient met! ods of aerating the tanks are among t measures proposed for making the fis comfortable. The task of keeping slow-moving fish is relatively simple, far as insuring their living to a matu age is concerned. In Europe, some speci: of carp have been known to live 100 year in their native habitat, and eight or nin years in captivity is not unusual. Bas- salmon, pike, big catfish, trout and th: common goldfish live four to seven years Some become so accustomed to their pat ticular tank that they die if placed in an other, while others thrive until strange!

Page 119

ELECTRIC RIVET HEATER } It (EATING ALFALFA SEED periment station, is reported to heit gives the best results. introduced into the commu- in which case it is not un- mon that all die. rmers have experienced con- rable difficulty in raising al- for the reason that many of seeds are so hard that they not absorb moisture and, con- uently, will not sprout. Miss na M. Lute, of the Colorado e overcome this trouble by jecting the seed to heat. From tests, she has found that a perature of 167 degrees Fahr- SAVES EXPENSE IN BUILDING conomy, through a saving in r and_ faster operation, is ied for an electric rivet heater replace oil or coal-burning es and furnaces. It is made in various ; and affords, in two types, nine steps eat control. With the larger sizes, a d operator can handle 600 rivets an hour still larger numbers of the smaller ets, it is said. The outfit uses alternat- current and is adjusted to give a thor- h heating without causing scale, burn- or the likelihood of heads popping off. ctric Rivet Heater in Operation; H as Nine Stages of Heat Control POPULAR MECHANICS 995 A Castle in Trees; Elaborate Garden Design Achieved by Training Shrubs and Vines MODEL CASTLE OF LIVE TREES NOVEL GARDEN DECORATION Pine, cypress and yew trees in a French garden have been trained into fantastic shapes resembling a small castle and other forms. Some of the pieces are grown about a framework, but others are shaped simply by careful and constant trimming. SMOKESTACKS OF OLD VESSELS PROTECT RAILWAY ROADBED Sections of smokestacks from salvaged ships are used on a mid-western railroad to protect the roadbed from steam when the locomotives are blown off at watering places. They are placed in such a way that the tops are flush with the track, and as steam is blown from the engine boiler close to the rails, it passes into these re- ceptacles, where it cannot dislodge the ballast or scald persons near by. A drain is provided to carry off hot water and im- purities, while the steam itself escapes through the top of the stacks. An addi- tional feature of the plan is that it elim- inates discoloring of the ballast.

Page 120

The Evolution of the Professor from One of His Problems; a Simple Chalk-Talk Problem When Hidden Per- forations, Visible Only to the Artist, Guide His Crayon Invisible Pattern Makes Chalk Talk Easy No Artistic Skill Needed to Make Rapid Drawings When the Lines Are All Shown by Minute Perforations HALK-TALK entertainments as given by professional require months of careful training and prepara- tion, for even a skilled artist canno: al- ways sketch amusing cartoons off-hand with the bold sweeping lines which hold the attention of a But with a little preparation anyone, even without drawing ability, can present a satisfactory parlor or social entertainment. The secret lies in having performers crowd. all the draw- ings done in advance and transferred to clean white sheets as rows of minute per- forations, perfectly visible to the artist, but so fine they cannot be detected by spectators seated half a dozen feet away. The perforating is done quickly with an ordinary tracing wheel, such as used by dressmakers in making patterns Cartoons of any kind, especially favor- ite characters from the newspaper comic sheets, make excellent material for parlor amusement, but the most interesting drawings, and the ones that lend them- 996 selves best to the “patter” with which t! artist keeps the audience's attention he draws, are the “evolution sketches” which a face is constructed from lett: figures or other material. A program canstart with the artist pri ing the letters Y, O and U on the big w! sheet on his easel, and then, while he « tertains the audience with talk, explaining that some. bri evolution of was from letters instead of monkeys, deftly sketches in a face, which, he will represent his composite audience, when the sketch is done the letters h become the mouth and double chin. The sheet is torn off, and the letters and E drawn on the next one, while | artist explains that, as further proof his evolution theory, he will demonstrat his own case. A few strokes and tl! letters again are part of a cartoon rep! senting the entertainer’s features. Frequently individuals in the audien nose, line of

Page 121

POPULAR MECHANICS Another Drawing, Showing How “Figures” Mold the Face of a Busi- ness Man, and, Below, the Evolu- tion of ““You and Me and Dobbin” \ -/ led | = eS INVISIBLE PATTERNS FOR AMATEUR ARTIST (70 | “ ENTERTAINERS =~ YO-N «ss eee ee eee ee ee eee M-E : SPELLS SPELLS BY “+ YOU . ME . 0, ai | ez) ‘ Ae OATS IN THE BAG " [4 al lle di) | £9 | E ——$—————————— id | AS THE AUDIENCE ~ AND THERE PERFORATED. PATTERN GN | SEES THE AND THS =A @ > EASEL;VISIBLEATO. \ \\ / @ YOU ARE ARTIST ONLY.” t DOBBIN. EVOLUTION 1S ME OF DOBBIN _ [*) \ ct in CHing | War in China Is Another Clever Evolu- tion Drawing; the Center Sketch Shows How the Letters of ‘“‘Oats’’ Become First a Bag of Food and Then the Horse That Consumed It

Page 122

POPULAR MECHANICS Using a Pantograph to Enlarge a Small Comic-Section Drawing can be singled out to fit in with the ready-prepared sheets, and the patter that goes with them. The evolution idea can be car- ried a step further by remark- ing that a man’s occupation is brought about through esses of evolution, that a man whose family tree is made up of accountants, bankers, book- mathematicians and men of similar professions, will proc- keepers, have a face made up of figures. As he talks the artist jots down, seem- > 3 3, 4 and 6, then rapidly fills in the connect- ing lines to complete the drawing. Another ingly at random, a series of figures, 0, interesting evolution sketch can be presented with an alleged reminis- cence of school days, when problems were transformed into the professor’s features. As he talks, the artist writes 0-0 x 1-1, and then transforms it into the professor’s face. Some of the chalk-talk drawings are even more complicated in their final evolution, The let- ters O, A, T and S, set down at random, spell oats, and then they can be placed in a bag, but with a few more deft strokes the bag becomes a horse’s head—the evo- lution from oats to horses. Some of the drawings tan. be presented keeping the audience guessing. One that lend itself to two developments is t] map of China. Announcing | can draw a map of the count: from memory, the artist sketch: a china teapot pauses to cor ment on preset in various ways. Transferring an Original Drawing to a Blank Sheet, Underneath, Piercing the Lines with an Ordinary Dressmakers’ Tracing Whee disturbed conditions in that country, a1 adds the letters W, A and R, when a fe more quick strokes will complete the p! ture of the man who started the troub! Or, reversing the process, the word “wa can be drawn first, and the words China” added at the bottom of the shee While the audience watches breathless to see what is going to be done with t! word, the china bowl is drawn around inclosing the “war” within “china,” a1 then the face is completed. And now for the process by which a1 amateur with no previous drawing e perience can present the entertainment. Obtain a supply of large sheets of pla white paper—ordinary newsprint from t! left-over rolls at the newspaper office wv do. Also get a large sheet of wallboat

Page 123

POPULAR MECHANICS large drawing board, build an easel upport the board and obtain a dress- ers’ tracing wheel and a number of mbtacks. rst work out the drawings in full size heets of paper, enlarging them from sketches shown here, or taking car- ns from the newpapers. When a draw- is completed, place it over a blank et of paper, and with the tracing wheel, over each line, perforating it into the nk sheet beneath. The original draw- or master sheet, is then saved for fu- e use, as it can be traced over and over in for successive talks. When all the tracings have been com- eted, assemble them in the order in which u wish to present them, place a plain ink sheet on top of the pile, and pin all f them tothe wallboard or drawing board th large thumbtacks. The plain top heet hides the perforations if anyone hould come close enough to inspect the ard before you start. When you are ready for the talk, make few lines on the plain sheet, then tear off as though spoiled. That exposes e first of the tracings, which, under arti- ial light, will be visible only to you, and not to your audience. Use a large and very soft, black draw- ng crayon, or piece of charcoal, which ll make wide and very black: lines. Exact enlargements of cartoons from » newspaper comics can be made by us- a pantograph, which can be obtained om a dealer in drawing instruments, or ade at home from 999 ELECTRIC FLASHLIGHT IN CANE SAVES POCKET SPACE Cane Light Turned On, Showing Its Usefulness in Helping Select Right Key Concealed in the handle of a cane, a powerful little flashlight is useful in emer- gencies. The batteries are hidden in the stick. The cane lamp saves carrying a flash in the pocket, an objectionable pro cedure to those who do not like to burden themselves with too many articles. TRAIN LIGHTS CROSSING SIGN RINGS BELL AND SETS FLAG Trains give warning of their approach on a crossing sign which is fitted with a bell, lights and moved auto- matically into a a stop flag, lew strips of wood. One end of the pan- eraph is fastened the table, a stylus traced over the nes of the drawing be copied, and a pencil fastened at e outer corner races an exact en- rgement on an- ther sheet of paper. YELLOW STEADY BEAM LIGHT @ Virginia is said to rank next to Cali- lorniaintheamount clear position when the train is coming, but remaining hid- den when the cross- ing is safe. A yellow light burns to give the signal for the railroad, and, when the train enters the block, this light is replaced by a flashing red one, while the stop sign, a large yellow re flecting disk, ap pears. The bell con ot sunshine received nnually. “Proceed” and “Stop” Positions of the Crossing Signal, Which Is Operated Automatically by Trains tinues to ring until the train is past.

Page 124

1000 POPULAR MECHANICS STOOL HAS ADJUSTABLE SEAT LOCKED WITH STEEL BALLS Adjusting the Stool Seat, and Diagram Showing Balls That Wedge against Bar, to Hold Stool in Position Gravity and steel balls simplify adjust- ment of a new stool to various ‘heights. When the stool is in an upright position, the balls wedge between a round steel bar and a tapered chamber wall to keep it in place. To elevate it, a pull is all that is necessary, and to lower the seat, the stool is turned upside down, the legs pulled up slightly and then pushed down. It is said that the seat will hold a person of any size or weight and that it will not easily get out of order. GROUND WIRE LEADS AIRPLANES TO SAFETY IN FOG Experiments with an electric leader ca- ble to guide airplanes to their landing field have been successfully carried out by the British air corps. The cable idea is based on the submarine cable, laid in New York harbor several vears ago, to guide ships in and out, delicate apparatus on the ves- sel picking up signals sent through the ca- ble on the sea bottom, and telling whether the ship was over or to the right or left of the leader. For aerial use a five-mile cable was laid in a very elongated oval, so that both ends would be at the same place, getting away from the difficulty of returning the current without disturbing t&e magnetic field. The cable is intende to supplement neon-tube lights used t pierce the dense English fogs. The neo: glow will penetrate 300 feet of fog whe: the airplane is well above it, but as th: ship descends, the light disappears fo some time, and then reappears when the plane is about 150 feet above the ground Coils on the airplane wings are used to pick up the current from the leader cable and an instrument in the cockpit not on! shows the whereabouts of the craft, but likewise indicates the distance above th: ground at which it is flying. TRUCK TO CENTER-LINE ROADS SAVES TIME AND COST Hundreds of miles of automobile road were marked with a center traffic line at a minimum of expense and time with th: aid of a special truck, equipped with fifth wheel for applying the safety guid Paint was carried in barrels on the aut: and supplied to the marker through valve. To insure keeping in the middle of the pavement, a wheel, taken from motorcycle, was placed on an extensio frame in front of the bumper and run just off the roadway. While painting, the truc! makes about two miles an hour. Marking Auto Highway with Truck Outfit That Paints Line from Supply Contained in Barrels

Page 125

ado | pista nce How to Forecast Reception ‘Local static forecasts coming better reception from the west. ‘Southern stations come in best after a widespread snowstorm. “Big drop in temperature indicates good weather to last several days. front of or behind you. [ AILY radio-reception forecasts may soon become a part of the weather orts given by the newspapers, as a re- lt of experiments that have shown the se connection hetween weather and reless distance. Professional operators have known for yng time that the direction from which itic came always indicated a storm cen- er, but it is only recently that rules have egun to be worked out by which the roposition can be reversed in order to btain from the weather map the location stations which will come in with good ume over long distances. [he problem is considerably simplified ecause of the fact that generally storms ove across the United States in an east- rly or northeasterly direction. If a torm center is shown on the weather iap between Omaha and Denver today, will probably be in the vicinity of Chi- igo tomorrow, and move on toward New ork and New England the next day. o, when static blots out stations to the est, it indicates a coming storm. [In that way it is possible to tell some- thing about coming weather by listening to the loud speaker grumble and howl, but the radio fan who likes to pull in the “Face the wind. Stations to right and left will come in better than those in distant stations can put the knowledge to much more use by taking the daily weather map and figuring out what sta- tions he has a good chance of bringing in. The weather map is covered with a series of lines, called isobars, amid which are printed such descriptive words as rain, snow, warm, cold, low and high. If the smaller and inner circle is marked “low,” it is a storm center, to which winds from other places are moving, and tf it is marked “high,” it indicates the place from which winds are coming to equalize pres- sures elsewhere. When you sit down at your receiver and take a look at your barometer, it may show a high reading of around thirty inches, with clear, good weather outside. But when you pick up the daily weather map and start stations to go after, you will find a situation something like this, pictured from an actual map is- sued one day recently: Over southern Iowa, northern Missouri and a small slice of eastern southeastern Ne- braska, as well as western Illinois, there was a “low” or storm center. Therefore there was static originating in the neigh- borhood of the broadcasting stations in St. Louis, Kansas City, Davenport and selecting Kansas and 1001

Page 126

1002 POPULAR MECHANICS © SWAN | Radio Compass and Map Recorder, Left, and, Above, Graphs of the Miami-Hurri cane Static, Normal Static and Wireless Code; Chart Shows Vessel’s Position and Static Picture during the Hurricane, with Storms All around Her dicating an approaching storm, it will show that much of the static heard is of local origin, under which circumstances few or none of the distant stations can be Des Moines, Iowa, Omaha, Nebr., and neighboring cities ; hence not much chance of a distant listener, say in New York, picking them up. But go a step further, and out on the western coast there was nothing but high in California, with a low up north in Washington. And between San Francis- co and New York all the isobars of the Missouri storm crossed the path between coast and coast at virtually right angles. Under such conditions the east coast would get the west coast with good vol- ume, and on the night in question did. Not everybody has access to the daily weather map, however, particularly those living in rural districts. But with a ba- rometer and a bit of practice it is possible, from one night’s reception, plus local weather conditions, to forecast rather ac- curately what the next night will bring. If the barometer is falling rapidly, in- heard. But when the storm pass es and moves on to the east, it should b followed by good reception, first from the north and later from the west. A stead and gentle rain, lasting for a day or more and not accompanied by lightning, fre quently is followed by improved recep tion from southern stations. When bot! north and south stations come in good there will usually be good reception fro: the west, and rather poor to the east. A set with a tickler dial makes a good weather forecaster, for, when a storm ap proaches, it is necessary to turn the tick.er higher to get the added regeneration neces sary to bring up signals which have be come muffled by static. Conversely, goo weather requires less regeneration. The navy recently has turned static to practical account by making it take a pic ture of itself to show storm centers sea. Hooking a radio-map machine, de signed to pick up weather maps transmit

Page 127

POPULAR MECHANICS j 1003 from Arlington, to a direction finder, then revolving the loop aerial, the vy wireless engineers get a perfect pic- e of the static at every point. Homemade Decorative Loop \n attractive loop can be made from ; and ends about the average home, as »wn in the illustration. The parts re- red are inexpensive: An_ ordinary p standard, which, if not already on d, can be obtained from the local niture dealer; a picture or piece of ed tapestry, a length of dowel stock two wood sticks, cut and shaped as vn and as long as the picture or tap- is wide. Remove all electric fittings the standard, and cut it to a length t will mount the loop at the required ht. Replace the metal tube in the ndard, and drill a hole in the dowel pin that it will make a snug fit when slipped n over the tube. Drill a hole the size the dowel through the center of one the wood strips and screw this to the of the picture near the bottom. An- er hole is drilled part way through the ter of the upper strip to take the top of the dowel and allow the finished ip to revolve. This strip is then screwed in the position shown. Any loop of pancake type may be used and is fas- ed to the back of the picture by means string and small screweyes. For the erage set, this loop should consist of ut 86 ft. of stranded loop wire with the ns spaced about 4% in. apart. 1 | BACK OF TAPESTRY FRAME IRON TUBE! Lamp 4 STANDARD | oto Shows Loop in Use, Harmonizing with Other Furniture; Right, Details of Loop and Mounting Below, Enlarged View of the Winding Showing Separa- tion of Turns; Above, Finished Coil New Wire Provides Air-Spaced Winding A new wire providing space-wound coils automatically, has been introduced by an English manufacturer. The wire is not completely covered but has two strands of insulating material wound spir- ally around the wire core. The insulat- ing strands not only separate the turns but also lift the entire winding clear of the tube form. This makes possible good low-loss coils without bakelite tubing, or skeleton forms, cardboard tubing taking the place of the more expensive forms. The wire is made in various gauges, and in both solid and stranded patterns. In the latter, the strands are not twisted around each other in the usual manner, but lie parallel, being held together by the insulating winding. Wire of this kind is excellent for use in loops. Use Old Tubes for Testing Keep on hand one or two old tubes that will light although they will not do for the set. These tubes are useful in testing the wiring in a newly completed set and will often save a good tube if there is some mistake. Keep them in a handy junk box where they will be out of the wav and still be accessible. lhe old tubes are placed in the sockets of the new set, and if they do not blow out, it is safe to put in good ones.

Page 128

POPULAR MECHANICS Radio World-Time Clock This clock tells correct time in all parts of the world from London (Greenwich), around the globe to Ber- lin, and is now available for radio long- distance fans who wish to compute the time in vari- ous parts of the world quickly. It is also of interest in the handling of radiograms. Binding Frayed Insulation The ends of fabric-covered telephone cords or flexible leads often fray out so as to make the terminals unsightly. This may be prevented by using stout, waxed cord, or twine, as. shown in the illustration. A loop is made in the cord as at the left, and the free end wrapped around the phone cord and loop as in the center, leaving a small bight of the loop exposed. Then the free end is passed through the bight, and the upper end pulled until the loop disappears below the winding. The ends of the cord and frayed ends of the insula- tion are then clipped off, as shown at the right, making a neat binding with no ex- ternal knots showing. How to Mount Panel on Baseboard When screwing the panel to a wooden baseboard, the the lower edge of the panel correctly, so that they will come in the center of the edge of the wood subpanel and not split out. Drill small holes for the wood screws before space holes in trying to screw them in place; a drill about half the size of the wood screw should be used. This will give a good tight fit and prevent splitting. Improved Method of Shielding Radio Receiver It is a tedious and difficult job to shield a radio receiver with thin metal sheets Owing to the tendency of thin metal to bulge and the difficulty of handling, it is hard work to turn out a neat-appearing job. To accomplish this in a simple man ner, use the following method: Solder a wire to a small piece of metal, fasten this with a woodscrew to the inside of the cabinet near the ground post, and connect the wire to the latter. Paint the interior of the cabinet, and the inside surface of the panel with any of the well-known metallic paints, such as aluminum or gold-bronze Be sure to have all the painted sur faces join, but do not let the paint come in contact with any of the instruments, painting around them instead. Also paint over the metal piece that connects to the ground. Metallic paints are good con ductors of electricity when dry. They are easy to apply, and if the work is care fully done, the finished job will be- neat and attractive. I have been using this method for some time, and find it very efficient.—Prof. William Hoppie, Los An- geles, Calif. Adjustable Gridleak Employs No Sliding or Pressure Contacts A new adjustable gridleak, by which, it is claimed, all microphonic noises whic! accompany the use of carbon or graphite are eliminated. has been placed on the market. sliding or contacts. There are no sure pres The glass cylinder which 1 \e hermetically contains a sistance liquid. As the thumbnut of the leak is turned for adjustment, the elec trodes enter this liquid more or less, gi\ ing a range of exact values for the tub« circuit and signal. It can be slipped int: any standard fixed-condenser clips.—! H. Georger, Buffalo, N. Y. sealed high-re

Page 129

ALL BATTERIES » EPLACING A, B and C-batteries with one compact unit and supplying all necessary voltages to the receiver, the trument described here is a real elim- tor, in the full sense of the word. It been thoroughly tested in Popular echanics radio laboratory and found supply sufficient humless A-power to erate up to nine tubes of the 201-A type th their filaments wired in series, in addi- n to provid- sufficient ind C-power these tubes. series wir- of the tube laments, wn in the i.gram on e 1008, re- uces the cur- nt demand to t required tube, hough the ltage, of urse, must be reased with addition to number of bes, and this easily man- ed. Another lvantage of ies wiring is it the “drop,” one Installing Device in Console, Showing Comparatively Small Space Required for the Complete A, B and C-Power Unit By FRANK L. BRITTIN or slight loss of voltage across the filament of one tube can be used as a C-bias for the grid of some other tube in the circuit, and this is pointed out in the diagram. With- out going into further details, the simple wiring diagram on page 1008 shows the reader how he can change his present set to use the new unit. Note carefully the sequence of the tubes in the filament cir- cuit, and the necessary 1-mfd. condensers across the detector and r. f. tubes, as these points are important. The upper circuit diagram shows a much simpler arrange- ment, which is the one advised if a new set is built especially for use with the unit. Such a set, of the 4-tube type, will be described in the coming July issue, and will be combined with the unit in one cabinet. The unit is designed for 60-cycle al- ternating cur- rent, 110 volts, and cannot be used on other any supply. This prologue to the actual building of the unit is given so that the reader may under- stand the con ditions under which the unit can be used be fore attempting to build it. The detailed layout and wir- ing diagram on page 1006 will immediately impress the 1005

Page 130

POPULAR MECHANICS

TO TERMINALS 3 AND 4 i \ ON BACK OF NO. 330

REAR VIEW coc

GEE '>

reader with the sim- plicity of the unit. It is easy to build, and the cost, including the rectifier tubes, is about the same as that of a storage battery, charger, and a good B-eliminator. Much advantage rests with the ABC-unit in that it requires no attention whatever and may be very simply controlled by a snap switch at the wall socket, which also controls the oper- ation of the receiver. The various parts are mounted on a 1 by 10 by 13-in. baseboard, which easily fits in the battery compartment of the average console, as shown in the photo on page 1005. It is even possible to install it in an ordinary cabinet with the set, as will be shown in the July issue. The sim- ple arrangement of the various parts on the baseboard is clearly shown in the sketch. The condensers are stacked and held in place by means of two brass rods, threaded No. 6-32; these are pushed up through the holes drilled in the baseboard, and the condensers held firmly in place by means of washers and nuts. Two heavy-duty resistors are connected across the A-positive, B-45 and B-amplifier ter- minals, and the resistor marked “X” brass may Layout of Power Unit, Showing All Instruments i: Position and Detailed Wiring Diagram of Connections be replaced by a universal-range Clarostat if the builder wishes to vary the detector plate voltage. The 1-mfd. condense mounted back of the resistors is a safety device, and should be of the 400-volt type as it must carry the entire output of the power supply, which is about 600 volts, ii the line current is turned on without the receiver filaments being connected to it Remember this caution, and never turn o1 the house current, unless the with all tubes in place, is connected t the power unit. The 1l-mfd. condense: might carry the load, but damage may r: sult. The rear view, in the insert above the detailed sketch, shows the 110-volt 60 cycle supply connected to both of the power unit, and terminating in t usual wall plug. A snap switch can connected in this line, or the unit disco nected by removing the plug from the wa socket, as desired. The device is really two distinct elit inator units, as may be seen in the sche matic diagram at the upper left on pag 1008, each unit being an exact duplicat: of the other. These units each use tw recei\ el sectio! hy

Page 131

POPULAR MECHANICS 1007 6-B rectifier tubes in conjunction _ transformer, chokes and the neces- eavy-duty condensers. In all there ur rectifier tubes, two transformers ‘wo filter systems. If your set em- tubes of the 199 or similar 3-volt only half of this double unit is re- The dotted line dividing the two in the upper drawing, page 1008, how the section at the right may it away without disturbing the re- _ terminals and control lamp which be retained. At this point it be- ; necessary to explain what this con- lamp is, and why it is used. The output of the two units is in the borhood of 160 volts at 250 milliamp. the tubes are connected, and, in to reduce this to a suitable value for receiver-tube filaments, a common {0-watt Mazda lamp is placed in with the filaments and the power If only one section of the power used, two 10-watt lamps should be | in series to reduce the filament sup- » the low rate required for the small 1 tubes in the set. If the set employs five or more of the small tubes, it may only be necessary to use one 10-watt lamp. In other words, the lamp acts das a resistance that can be varied by the size of the lamp employed. For example, in a five-tube set using 201-A tubes and the double power unit, all tubes in series will draw about 25 volts at Y% amp., and the 25-watt lamp will draw about 120 volts at 4 amp., thus making 145 volts at 4% amp. The plate circuits of the tubes will take 20 milliamp. more and this will account for the drop in voltage of the power supply from 160 volts to 145 or 150 volts in actual practice. The simplest way to determine the correct lamp to use for Left, Assembling Condenser Pack: Above, Completed Unit Ready for Installation a six, seven or eight-tube set would be to connect the tubes, in series with the lamp, to the power supply, and try, first, a 25-watt, 120-volt lamp; then a 25-watt, 110-volt

Page 132

1008 POPULAR MECHANICS —= => | Above, Schematic Diagram of Double Unit; Dotted L POWER — Shows Section to Be Rem: oe : If 3-Volt Tubes Are Used RECTIFIER TUBES i] | eo. CYCLE | A.C.SUPPLY | | i NO. 331 CHOKES 4 4 ‘ CUT =] da, MFD. | || DROP ACROSS 1ST Oe ee ||| A.F.FILAMENT PROVIDES , DET. TUBE GRID lamp; then a 40-watt, | C-BIAS ON 2% AF. TUBE POSITIVE 120-volt lamp, and final- ly a 40-watt, 110-volt lamp. With one of these lamps, the builder will be able to obtain the proper filament voltage TYPICAL SERIES FILAAAEMT WIRRIS. FOR &- which can be measured TUBE RECEIVER, BUILT FOR A-B-C-ELIMINATOR by a common d. c. volt- meter of the type used for checking B-bat- teries, connected across € 7 = the filament of any tube | 4, GE IMFD in the set; the reading FILAMENT WIRING Di DIAGRAM FOR eemnte Ox ADAPTED To should be between 4% | -B - C-ELIMINATOR and 5 volts. Obviously, when connecting tubes in series, the tubes on which the greatest audio-amplifier tube is hooked in bel voltage is desired should always be hooked the second audio, which will give 5-v nearest the negative end of the eliminator. grid bias, or “negative-C,” on the grid These will be the audio-amplifier tubes. the last audio tube. If 10-volt C-bias we The detector, which requires the least plate required, it would be necessary to util! voltage, is placed nearest the positive end. the drop across two tube filaments inst Of course, you cannot hook the second of one. audio amplifier tube directly at the nega- However, for all practical purposes, t! tive end for then you would not be able to 5-volt drop across one tube appears to | get the necessary C-bias; therefore the first satisfactory. In connection with the a't MATERIAL LIST baseboard, 1 by 10 by 13 in 2 Lynch, Ward-Leonard, or similar type, heavy § Sangamo wound condensers, series B, 2-mfd. resistors, 5,000 ohms Sangamo ndenser, series A, 1-mfd., for 400 1 Fahnestock clips volts d 6 ft. lampcord, with plug Silver-Marshall power transformers, type 330. Woodscrews, flexible, rubber-covered fixture wit Silver-Marshall unichokes, type 331 (well insulated, str anded type) standard X-type sockets 2 brass rods, 5 in. long, No. 6-32 thread, 1 1 common porcelain socket long, on each end 4 UX216-B, or CX316-B rectifying tubes + No. 6-32 brass nuts and washers

Page 133

‘ POPULAR MECHANICS 1009 of standard receivers to series fila- wiring, there is only one precau- to be observed, and that is, to by- ill r. f. and detector-tube filaments l-mfd. condensers, as shown in the ent wiring diagram. large detailed blueprint may be ob- ed from the Popular Mechanics radio rtment, 200 E. Ontario st., Chicago, 25 cents, to cover postage and packing. cify blueprint No. 119. Repairing Loud-Speaker Diaphragm uud-speaker diaphragms of the mica vhile very efficient, are not as rugged ome others. Having one that was ked, I tried various materials for re- ing this diaphragm, and at last found a disk of hard maple, cut to proper and sandpapered to a uniform thick- of M2 in., served very well. The tone lity was improved—Malen W. Clark, Homemade Low-Loss Coils using a short length of cardboard ing and gluing six lengths of wood, lite or hard rubber on the outside, at il distances apart, efficient low-loss can be made at home. The strips planed or filed so that they have a tri- ular cross section and, if made of wood, uld be coated with collodion or shellac, prevent absorption of moisture. Bake- or hard rubber is, however. the better terial. To separate the turns of the evenly, a silk cord is run over and ler them as indicated, or if desired, } ually spaced nicks are cut along the edge | the strips with a knife file. rdboard Tube and Narrow Strips of Wood or Bake- lite Make Good Form for Low-Loss Coil Shock-Absorbing Tube Mounting When tube sockets are rigidly mounted on the subpanel of a receiver, vibrations are readily transmitted to the tube ele- RUBBER ELASTIC ~*-~PANEL ------- Strip of Wide Rubber Band Makes a Shock-Absorbing Base for Tubes ments, causing howls, which increase in intensity. These howls are called “micro phonics” and can usually be eliminated by providing a shock-absorbing cushion under the sockets. The same result can be obtained by mounting them on a wide strip of rubber, which is fastened at both ends as shown in the illustration. Flex ible wires should be used for making con- nection with the sockets instead of rigid busbar wire, which permits vibrations to be transmitted to the tubes even if they are mounted on a shock-absorbing base. The sockets should be held securely while inserting the tubes, to prevent tearing the rubber or pulling the wires loose.—H. R Wallin, Brooklyn, N. Y Keep Aerial Away from Power Lines When installing the aerial, be careful that no part of it runs over or under any electric wires or cables that may be on or near the building. Do not place the aerial near such wires, as they may be carrying high-voltage currents and, if the aerial should fall or come in contact with such wires, the high voltage would be conducted into the set—a very dangerous possibility. Always place the aerial at right angles to any power line in the vi- cinity; this will prevent the picking up of any interference from such lines

Page 134

1010 Simplifying Battery Connections Most radio owners have their individual ways of handling dry-cell batteries, but the method shown in the illustration, used by one exper- imenter, is very simple and efficient. This consists in a compact assembly wherethe cells, placed one above the other. make connections in the same manner as in large flash- lights. To make the neg- ative contact . ... ac i reu lar disk is cut from the base of each cardboard container so that the positive terminal of the cell below makés contact at this point. Two pieces of l-in. quarter-round molding are nailed to the wall, in a corner of a closet. or at any other convenient point, to hold the batteries in an upright position. A small brass terminal on the floor, at the base, provides a negative terminal of the assembly, and the positive connection is taken from the center post on the top batterv.—G. A. Luers, Washington, D. C. New High MU-Tube Increases Volume A new “high MU” amplifier tube, known as the CX-340, has lately made its appear- ance on the market. It has been devel- oped especially for resistance-coupled and impedance-coupled a. f. amplification cir- cuits. The filament voltage required is 5; filament current, .25 amp., and the recom- mended B-voltage is from 135 to 180. The amplification factor is 30 instead of 20, as claimed for former tubes of this type. The requirement of amplifier tubes for resist- ance and impedance coupling is identical, but -entirely different from the tube re- quirement for transformer coupling. This being the case, many radio owners who have been using resistance or impedance- POPULAR MECHANICS coupled amplifiers with the standard A tubes have not been obtaining the possible results from their receivers. Fishing Poles for Aerial Masts The auto camper will find a fishing pole handy for an aerial mast, as poles are u ally a part of the camper’s outfit and can be put to double use where it is difficult to erect a temporary aerial. The aerial wire if sufficiently flexible and of small size, can be wound on an old reel. It is then eas unwound and will not become tangled The pole may be lashed upright to the car and the wire stretched to some tree. Homemade R. F. Choke Coils Radio-frequency choke coils are used more and more, especially in short-wave receivers, and sets where it is difficult to keep the r. f. current out of the audio stages. Experimental r. f. choke coils are usually wound on empty sewing-cotto: spools. Such chokes, however, have large distributed capacity, as the layers wire are very close together. The capa ity may be considerably reduced by brea ing up the winding into sections, or “slabs,” and connecting these in series. The forms may be turned from wood or hard-rubber rod of suitable diameter, but as this neces- sitates the use of a lathe, the common wood spool may also be used. The sket: shows how three sectional windings m be separated by two sets of wood or ha: rubber dowel pins driven into holes drill: through the spool. The pins are about in. in diameter, and their ends should | tapered to prevent splitting when they a forced into the holes. The lower illust: tion shows a cross section of the spo giving the position of the dowel pins int completed form. The winding of ‘ HARD RUBBER OR WOODEN PINS; SECTIONAL VIEW ----"

Page 135

et is left blank for logging. POPULAR MECHANICS coil is carried out as usual, a total ut 300 turns of No. 30 gauge wire required for the broadcast range. 100 turns into the first “slot,” then next with another 100 turns, and the last slot. The wire is carried rom one section to the other without k—C. A. Oldroyd, Barrow-in-Fur- England. Receiver Resembles Cash Register sembling a cash register, the radio ver shown in the photo consists of -units,a base for holding the batteries, eceiving unit, which is a five-tube r. f. it, and a lond speaker. Tuning is by means of levers connected to the lenser shafts, and extending through They should be held ctional engagement with each other, it. when the main lever is moved, the with it, but them, can be moved independently ising of the set. move either of urse, ilancing the different circuits over the e wave band. A pointer on the main lever registers with long sheets on side. One of these sheets is printed i list of high lual stations and, as in tun- it is only necessary to carry a pencil rom the station name to the point re it comes in on the scales. The other The chas- one unit and, by removing the tube power receivers vary slightly er and taking out four screws, the set bared for inspections or adjustment. cabinet is of metal and effectively lds the wiring so the tuning is sharp. ) Réceiver Resembling a Cash Register Has Levers for Tuning the Condensers 1011 Directional Effects from Outdoor Aerials Many radio fans have noticed that long outdoor aerials have slight directional end 2) Wyse “ian fe eh i ee \~) TO AER i POST ON SS Getting the Benefit from the Directional Quality of Outdoor Aerials i he S! seems to tendencies enal from a long tant station come in better if is directly in line with the aerial and farthest away f With thi 1 four separate aerials, at right angles end of the aerial lead-in points toward it. view, to each other, and having separate lead-in the are attached to the showt the then, wires, may be erected as shown in The lead-ins points of an induction switch as The aerial drawing. lever is connected with the and by merely moving the lever, any one of the four aerials switch post on receiver, can be used. By running a jumper wire across the points, any pair or all aerials can be connected to the set. Simple Lead-In Arrangement Bringing the lead-in through the win dow to the set, often puzzles the radio fan and seems to be the hardest problem to There are several methods in use, such as drilling a the gl through the sash or window casing, but defaces the building and quite a bit of hard work. A simple meth od is to provide a strip of wood the width of the window and three high; this is drilled to take insulator and is then set on the sill under the sash. soly i hole in ass, Ot! each entails two or inches a porcelain

Page 136

POPULAR MECHANICS Orchestras in Japan Have Many Unusual Instruments and the Players Are Seated on the Floor; the Micr phone of JOCK Being Specially Located for These Performers Japan’s Largest Broadcasting Studio amplifier unit costs little and is well wor while. The newer phonograph reco are electrically cut and have fuller t and greater depth than the old type in order that the full tonal values be produced, a means of amplifying wit! distortion is necessary. A_ three-st resistance-coupled amplifier unit is id for this purpose. Two MU-20 or h amplification tubes should be empl Combining Phonograph with Radio for the first two stages, and a MU-6 Amplifier power tube, for the last stage, with pi er C-battery. Such a unit, relatively Bringing the old phonograph up to date expensive, will provide faithful ampli! by combining it with a standard radio tion and volume sufficient for the lat : living room, in conjunction with a ¢ INSULATE FROM ~~ bt ae ! SOUND BOX He cone speaker. The pick-up device : f converting the needle vibration into e trical variations consists of a small mi phone known as the Skinderviken ton. The diagram shows the connect for the button and how it is mounted the tonearm of the phonograph. Station JOCK at Nagoya is Japan’s largest and most popular broadcasting Station. It has a 6-kw. transmitter and can be heard regularly on the western coast of the United States. The studio is equipped and arranged in both European and Japanese style. i “BUTTON STYLUS ARM How to Check R. F. Tubes Of late many builders of radio sets ; eliminating the detector jack because the importance of using less wiring. T! ._. = _ ” -"s -. : ’ J Ps ~ rr? yy ac¢ ‘ AMPLIFIER of course, Is an advantage, but ha drawback in that no provision is n Ab . for checking the r. f. tubes under ope: ove, Front and Si i i t . *,° a in BB Nigh Bing tag Button ing conditions. Tubes, as they are tur!

Page 137

POPULAR MECHANICS today, are faulty in many cases and tion of these faults is difficult unless means is provided for determining juality of the signal as delivered by letector tube. It is also a fact that tubes do not make good r. f. ampli- and if distorted or weak signals are lied by these tubes to the detector, results are sure to follow in the a. f. no matter how good these stages be. Experience has shown that, out dozen tubes picked at random, only or possibly three will be good r. f. es. If no detector jack is provided, he set, the operator may check the es by connecting a double-circuit jack he detector output, or, for temporary king, the phone-cord tips may be ed under the plate post of the detector -and detector B-battery terminal, thus ng out the stages.—L. H. rger, Buffalo, audio N. Y. Convenient Coil Form making spiderweb coils the form n in the illustration will be found It consists of two circular wooden blocks, about 2 in. in diam- eter, although they may be larger or smaller to suit the coil you wish to wind. Cut a groove in one side of each block to accommodate the heads of nails, and fas- ten the blocks together with screws or bolts so that the oves are on the inside. Drili holes m the edge to the center of the blocks nail shanks and be sure to space them rt equally. Then take the blocks apart, ert the nails, screw the blocks together vain, and drill a hole in the center of the icks, which completes the form. The nstruction may be simplified by using ort lengths of brass rod instead of nails, lin this case it is not necessary to cut oves in the blocks.—Arnim F. Reeves, ton, N. Y. Dull Finish for Panels A novel satin finish on radio panels, which shows traces of circular rubbing, Simple Homemade Tool for Giving Radio Panels a Dull Finish f ~ jm a can be had by using the tool shown in the drawing. It consists of a hardwood disk with a shank that will fit a carpenters’ brace. A leather disk of the same size is glued on with waterproof glue an face is roughened with a file or fine sand paper. d its sur Powdered pumicestone, moistened with water or oil, is used as an abrasive, the leather face of the tool being dipped in it and the tool then applied to the surface of the panel, rotating it evenly. The dull circles made in this way give the panel a very attractive appearance. Booster Charger Has High and Low Rate The trickle and _ fast-rate charger shown in the illustration supplies a much need- ed means of quickly bring- ing back the A-battery to full charge, if the trickle charger should fail to meet anun- usual drain on the battery. The toggle switch shown in the detail permits rate of ! combined quick change from a charging to 2% amp., as required. a /

Page 138

POPULAR MECHANICS lograph. During this step, the cur: must not be distorted in the slightest gree. In the oscillograph, a tiny spx light reflected from the moving ele: vibrates back and forth across the ph graphic film, which is placed « drum. After development, film shows a trace represent the wave form, intensity and pitc! of the sound picked up by the : crophone. Ordinary radio equip ment is not accurate enough this work, and each of these vices must be specially built the purpose. Noise hunting cars is dificult because vibratio: may be “telegraphed” from « member to another, and thus the: is always the danger that t wrong member will be accused o making the noise. It often ha; Radio Apparatus, Coupled to an Oscillograph, Is Used to Locate pens, too, that, when the r Noises in Automobile Motors source is found, the changes n: Radio Detects Automobile Noises essary to eliminate the noise, cannot made. In such cases, one or more of t Visitors at an automobile demonstra- members through which the noise is bei tion in Detroit saw, projected ona screen. telegraphed are changed so that they the shape that sound waves assume. It no longer respond to the vibrations. showed in popular form the more delicate and elaborate apparatus used for locating automobile noises. To study them it is necessary to reproduce the sound waves Reproducing Phonograph Records through Radio Set faithfully on a photographic film, where The tone quality of phonograph mu they are measured. The data are used can be improved by fitting an earphone t to trace the noise to its source. The [_,, DETECTOR ist ar aw , - : lal t apparatus in the dy | ai ; \ audio amplifier o f —— 3 ( the tonearm, co: necting it with testing laboratory consists of three | distinct units: the | the first a. f. trar microphone, the | Y former, as showt amplifier and the — a | the diagram. T! oscillograph. The TO PHONOGRAPH ba: ll arrangement g1 microphone picks .* much more volu up the noise vibra- than the phon tions in the air and graph alone, whi changes them into makes it especi pulsating electric suitable for use currents. The as halls. The lo vacuum-tube am- plifier magnifies ; f «located a consid these currents un- he radio set, across t primary winding speaker can also s able distance fr til they become the phonogray strong enough to a te ~=0or Which may be co: actuate the delicate venient on ma wt. 4s ¥ ty Arrangement for Reproducing Phonograph Records . element of an oscil- ieatla teat aaa occasions.

Page 139

wn ‘ - , £> | How to Make a tiene Baker By C. P. FORDYCE \E mark of the efficient camp craits- the flare or open front before the leaping ne * man is that he be able to make good flames of a camp fire; in the center of re from scanty food supplies. Per- this angular unit is set the bake tin with he nothing is so trying as to attempt’ its batter or dough. The heat from the make good breads with the limited camp fire hits the polished flat upper sur- sils at hand. In the north woods the’ face and is thrown down upon the top cting baker of aluminum or light tin’ of the breadstuff and from the lower up e most popular style for all kinds of against the bottom of the bake tin. Being ng and roasting. It consists of two of thin-gauge sheet metal and _ folding 1etal surfaces set at an angle with flat, the reflecting baker weighs but a few closed to hold the heat, and with ounces and is easily carried in the pack. n | Sy Se * x ‘ BOL EGS py + wa ig S Sass SS How the Reflecting Baker Is Used; Note the High Fire and the Back-Log Reflector, and How the Baker Is Supported to Throw the Heat against Both Sides of the Pan 1015

Page 140

1016 You can make one of these bakers at home and for this you will need a piece

WIRE FOR FASTENING, SIDES _- HOLE FOR WIRE PAN “~< REST

F tate Nx / WIRE PAN REST BAKING PAN, 8x iz}

Foe BAKER SET UP BEFORE CAMP FIRE Deiails of Construction of the Reflecting Camp Baker and the Baking Pan of tin, 12 in. wide and 33 in. long; half a dozen small hinges, a pair of tinners’ shears and a punch, two dozen tinners’ rivets and a hammer. Cut the tin into three rectangles, 12 by 11 in. on the side, and use two to make the top and bottom of the reflector. They are hinged together so that they will fold like the covers of a book. The sides are made by cutting the third piece of tin diagonally across, pro- ducing two triangular sections, which are both hinged to the bottom piece of the baker. Lugs are formed on these, and on the top piece, as shown, to take a piece of wire that locks the baker when open. Near the center of the sides punch holes for inserting the ends of the wire pan rest. When you wish to use the baker, drive two small stakes into the ground and rest the rear edge of the baker on them. The bake pan can be made of another piece of tin if not purchased; the dimensions are from 8 by 10 in. to 8 by 11% in. The special points about the fire for the reflector are that it must be built high and preferably with a back log reflector. A low fire burns the lower side of the biscuits before the upper side browns. The best woods to use are hickory, hard maple, oak and birch. Later these will

POPULAR MECHANICS burn down to a fine set of coals which can be utilized for another cooking. The regulation of the heat is done by moy the baker to or from the fire and by la ing a green log on the ground before ihe tops of the biscuits are done. The secret of success of the camp baker is the en- velope of hot air, which must not be too hot and which must be kept even. Prac- tically all of the commoner recipes in baking and roasting can be used. “Digging” Worms with Electricity On a recent fishing trip, I found it di! ficult to get worms, so I took two electric lighting wires of opposite polarity and connected each one to a screwdriver to make good contact with the shank. These I stuck into the ground about 4 or 6 ft apart and then turned the current on. In a short time, the worms came to the su: face so that they could be picked up—t W. Carroll, Portland, Oreg. Combination Lamp and Picture Frame Novelty lamps of various designs art the one quite popular nowadays, and shown in the photo will perhaps strike your fancy. It is a dresser lamp and serves the ad- ditional pur- pose of hold- ing a photo. It consists of a baseand two standards, on the end of which minia- ture sockets are mounted for lamps of the design in- dicated. The standards are drilled lengt! wise to accommodate the lampcord, whi leads to each socket, these being co: nected in parallel in the base, which drilled for that purpose. The connectio: should be well soldered and taped. T! picture frame is pivoted between the stan ards.—B. J. Jakaitis, Chicago, Il.

Page 141

POPULAR MECHANICS Lock for Ford Coupe o prevent thieves from steal- things from the rear end of Ford coupe, one owner put a latch which could only be ned from the inside of the car. er the latch is closed and the rs are locked, the rear end can- be opened unless pried. A ill wire leads from the latch to left side of the cushion and tens to a ring, which prevents from slipping back and also handle. When the re is pulled the latch is released. make it work automatically, spring in the latch pushes it ck again and locks the rear end soon as the wire is let go.—R. McNatt, Beaumont, Tex. es aS a Locating Knots on Quilts In making comforters, the work locating the various equidistant ints where knots are sewed on, | be simplified by using string as »wn in the illustration. The length and dth of the quilt are divided into equal ices along the supporting frame and cks inserted at each mark. arn is strung across the quilt from tack tack to weave a sort of lattice and pins re inserted through the quilt at each in- Twine or tersection. The string and tacks are then emoved and the work of tying may be ccomplished in a short time.—G. E. Hen- lrickson, Argyle, Wis. mple Method of Locating Correct Position of Knots on Quilts or Comforters . the illustration. Four-Wheel Equalizing Brakes for Boys Are Easy to Make and Adjust Four-Wheel Brake on Boy’s Coaster Boys who make their own coasters will find it useful and interesting to provide a four-wheel equalizing brake as shown in the drawing. It two pieces attached to a specially made wooden frame by means of steel bolts. consists of cross- Small coil springs are slipped over the bolts, between the crosspieces and the frame, to keep the former from touching the wheels when the brake is not applied. Both the front and the rear crosspiece are provided with a length of sash cord, one being run through pulleys and attached to a foot lever and the other fastened to the eve of the central pulley, as shown clearly in the details of $v forward pressure on the lever, which is pivoted to the under side of the car, the brakes are applied.—Hi Sibley, Los Angeles, Calif. @Two shotgun shells, one of 12-gauge and the other of the 16-gauge size, make a neat and useful matchbox for the hunts- man; the larger shell fits snugly over the smaller one, making the box practically waterproof.

Page 142

1018 Side Guards Improve Tonneau Seat Tonneau seats, which are used ona large number of roadsters, can be improved by the provision of side guards. These are UPHOLSTERING MATERIAL ‘ SNAP FASTENERS | == Triangular Pieces of Upholstering Material Fitted with Snap Fasteners Improve Tonneau Seat simply triangular pieces of top covering, or upholstering material, edged and pro- vided with evelets to fit snap or turn-type fasteners which are driven into the seat. Besides helping to keep out dust and draft, they add to the appearance of the tonneau seat.—G, A, Luers, Washington, D. C. How to Calk a Small Boat Wooden boats are prevented from ex- cessive leaking by calking between the planking. This consists in driving in some suitable material between the planks so that it will be held firmly by the swelling wood and will close the seam to make it water-tight. The paint later applied also acts as a binder. In calking, the first op- eration is to smooth off the outside of the hull with the plane and sandpaper; then prepare the calking material, either . oakum or spun cotton. Pull out and lightly twist enough of the material to lay in a few feet of the seam. Then, with a calking tool, drive in the material by plac- ing the edge of the tool on the material and tapping the handle with a hammer. Drive it in well but not hard enough to spring the planking or split it on the in- side. If the seam is narrow, it may be nec- essary to lubricate the calking material slightly with graphite. If the seam is too POPULAR MECHANICS tight, open it with a chisel. One sea: should be finished before commencing t| next, and no calking material left project ing above the surface of the hull. When the calking is done, the hull should again be gone over with a small block plane t remove all the rough spots and then sand papered. For boats that are to be painted the sandpaper can be rubbed crossway of as well as with the grain, but for boat that are to receive a varnish finish the sandpaper should be rubbed only with the grain. First use the rough grade and then the fine. The priming coat of paint should be applied well into the seams to bind the calking material to the wood and prevent it from “spitting” out. When the final coats are applied, the seams will be wel! covered so that they are invisible. In calking old boats, be careful not to start the planking by too severe use of the calk ing iron and do not chip off the soft edges of the wood. Cotton soaked in linseed oi! makes a slightly better job as the oil fills the pores of the wood and binds the cotton to it. An old hull should be dried out for several hours before calking it. Simply Constructed Lawn Sprayer A simple and practical lawn sprayer consisting of a gaspipe tee, two plugs and a carriage bolt, can be made in a few min utes. One of the plugs is drilled to re ceive a %-in. carriage bolt, 10 in. long, and from this bolt the head is clipped and the shank filed to a sharp point, as indicated. A rubber or lead washer is used in assembling the bolt and plug to make a watertight joint. The plugs are screwed into the tee after an angular slot has been sawed in the latter, as shown. With the hose attached and the sharpened bolt inserted into the ground, the spraye! is ready for use and, in operation, will pro vide the wide mistlike spray so desired for the watering of lawns and gardens. PLUG- PIPE TEE a

Page 143

POPULAR MECHANICS @ A Saas Pass a W i/p a Novel Aerial Trolley for Diving = nto Small Streams Where Shal- 1019 w Water Prevents the Practice _ ..-_—__—_-=_=—_— of Diving from the Banks Trolley for Bathers If you go swimming in a narrow river ere it is impossible to dive from the inks, rig up a trolley over the stream, as hown in the illustration. A strong rope securely tied to a tree on each bank, ne end higher than the other. The trolley consists of a piece of 2 by 4-in. tock to which two wooden pulleys are ttached by means of U-shaped hangers. \n ordinary bolt is slipped through holes 1 Simple Repair for Leaky Drain Pipe Many small repair jobs around the house can be done with cement. A leaky drain pipe from a kitchen sink was fixed by this In this instance the lead pipe, hich ran down through ‘the floor; had roken loose where it was joined to the ist-iron pipe and also had a hole, about ; in. in diameter. Narrow strips of cloth, oaked in a thin mixture of cement and vater, were wound around the joint. A eans. drilled in the end of these and washers are placed between the sides of the hang- ers and the pulleys. A rope handle is provided for the rider, being fastened to the trolley as shown, and a long rope is tied to the latter so that it can be pulled back to the starting position. The rope should be coiled to prevent it from being tangled when the trolley takes off.—Dale R. Van Horn, Lincoln, Nebr. few turns of some light wire around the cloth served to reinforce it, and another layer of cloth and wire was applied for good measure. This repair has lasted for over two vears and it still remains in per- fect condition.—J. H. Edwards, Hunting- ton, W. Va. @ To remove a cork from a bottle drive a screweye into it, and if the bottle has to be uncorked frequently, leave the screw- eye in the cork.

Page 144

1020

Homemade Ejector Attached to Water System Lightens Labor on Wash Days Ejector for Emptying Washtubs Carrying tubs of water is a difficult task and emptying them by buckets takes time. This work can be eliminated by using the ejector shown in the drawing, which acts as a siphon. Run a length of 34-in. pipe from the water main down the wall, verti- cally, and fit a valve on the end. A short nipple is screwed into the valve, a Y-fit- ting is added and then another length of pipe, which leads to the drain. <A short POPULAR MECHANICS of water through the pipe will suck th water out of the tub. After the siphon a: tion has started, the valve can be closed. Reclaiming Old Paint Many amateur painters have wondere why paint that has stood for a time in can, more or less exposed to the air, creep and crawls in spite of the best efforts brushing it over the surface painted. Th action, though troublesome, is not due t the method of handling the brush, but i due to too much exposure to the air. What should be done is to mix the paint with benzine or gasoline and allow it t stand, after being well stirred, for a da or more. Then pour off the benzine o: gasoline with the oil and add a fresh sup ply of linseed oil and a little more drie: than would ordinarily be used. Sand Box for Children Built of Concrete Children’s sand boxes are usually made of wood, but concrete gives a better ap pearance and is, of course, more durable The box should be large enough to accom modate several children. In building one a trench is dug to a depth of about 18 in and wide enough to receive wooden form made of 34-in. material. The stakes, whic! are lengths of 2 by 4-in. wood, should not be over 3 ft. apart. Care should be taken that the top of the form is level and that the inner surface is as smooth as possible The form should be drenched before it is filled. About 1% cu. ft. of concrete wil

nipple is screwed be required for eac!

into the Y-fitting and a length of hose running foot. A box

15 ft. long and 5 ft

is attached as shown. ting should belower than the bottom of the tub when standing on a bench, in order to make the ejector work effectively. When a tub is to be emptied, place the end of the hose in the tub near the bottom and turn on the valve. The rush

Y Yj Wj The Y-fit- -2 UVM: Concrete Sand Box for the Children Is Neat-Looking and Durable wide will require 4834 cu. ft. of con crete. The mixture is made in the pro portion of 1 sack, o1 1 cu. ft., of cemert to 24% of sand and 4 of pebbles, rang ing from % in. to | in. in diameter. All told, about 10 sacks of cement, 25 cu. ft of sand and 40 cu ft. of pebbles will bh required. The next QML EL a

Page 145

POPULAR MECHANICS after the form is filled it may be re- ed and the surface of the wall trow- with a small amount of cement and | in the proportion of 1 to 2. Before mortar has hardened, the entire sur- should be painted with a_ well- red mixture of cement and water of reamy consistency, which may be ap- <1 with an old paintbrush. The wall uld be kept damp for several days and be covered with wet burlap, straw or lding paper to protect it from the sun. e sand box is filled, to a depth of 9 to in., with clean, white sand in which ldren will enjoy playing. A concrete ir is not necessary, but if desired, pro- ion should be made for draining it.—A. R. Curtis, Chicago, Il. Auto Radiator Automatically Blanketed \ Wisconsin merchant who keeps sev- eral delivery cars in a small, unheated ga- rage at the rear of his store, found that, hile the blanketing of the radiators be- veen trips preserved the heat of the en- nes so that the starting was made easier nd required less fuel, the crowded park-

\ :

Blankets Hanging in Garage Automatically Drop Down and Cover Auto Hoods ng space in the building made the task ither difficult, and the drivers often neg- cted it. To overcome the trouble, blank- are hung from the ceiling, so that, when car is driven into its space, they auto- matically cover the radiator and front. 1021 Making Deadeyes for Ship Models One of the jobs that daunts the amateur ship modeler is the making of the numer- CUTTER FOR USE IN BRACE OR HAND DRILL Te GROOVED WITH RAT-TAIL FILE Fic.3 ous deadeyes required for the standing rigging. With a couple of simple tools, however, this job can be robbed of its ter- rors, and enough deadeyes for the average ship can be made in a single evening. The first tool is made of a short length of %-in. drill rod; a “4s-in. hole is drilled along the axis,‘as shown in Fig. 1, and the end is then ground to the shape shown, and sharpened to a good edge on the oil- stone. The deadeyes are made of box- wood, old scales or rules providing the material, and they are marked on the wood, as indicated in Fig. 2, using a light hammer to outline the circles with the tool. The next step is to drill the holes for the lan vards, and, in doing this, be sure to lay out and drill the holes as shown in Fig. 4. The tool is now mounted in the brace or hand drill and the deadeyes cut out. The next tool is a short length of ‘4e-in. dowel stock, Fig. 3, into the end of which has been driven three bank pins, spaced so as to fit the holes in the deadeyes, and cut off so that they do not project through the latter. With a deadeye mounted on the end of this tool it is easy to sand the curve on the face and to cut the groove around the edge, using a rat-tail or a tri- angular file for the latter operation.—L. E. Davis, Syracuse, N. Y. @ Scorch marks on linen may be removed by rubbing with a freshly cut onion and afterward soaking in cold water.

Page 146

i ie! a na WA te Bk yp Bee. ae fe ae,” w AU ne O the inexperienced ca- noeist all canoes look pretty much alike, but there are on the market a vide variety of models, many of which are made ia ng ee m me oar me ge ji li i, Wis va age i il EI a orutat «Ali mana vom cada me a ene ervey J for special purposes; so it behooves the beginner in canoecraft to “watch his step” when he strolls into a sporting-goods store to buy his first canoe. Shape, length, breadth and weight are the four factors that must be kept in mind when selecting your canoe for lake or river use. | have found that the best way to get these four factors impressed in one’s mind is to stand in front of several racks holding canoes and then check factors by an inspection of each model. For example, you may see a short, com- pact, speedy-looking little craft that looks “cute’—so attractive, in fact, that you want to buy it at once. That is the way I felt when I first saw a 12-ft. one-man “boat.” But it is not adapted for general canoeing, for you and your guide to go fishing in. It is a one-man outfit, a spe- cialized craft limited in carrying capacity and stability. In this manner you learn that flat-bottomed, wide canoes are more stable, but not so speedy as narrow round- bottomed craft. Most canoeists, and especially those who pack up their duffle and make fairly long on these 1022 trips on a river or through a lake region want carrying capacity and stability, wit! speed a third consideration. In words, when one turns explorer by water and takes along a complete camping out fit, the craft must be steady, have ample storage room and at the same time paddk with ease. Length and width are the two most important factors in deciding sea worthiness and carrying capacity. So, 1! you are looking for a cruising canoe, you must not buy or use a short narrow craft To illustrate this basic rule of canoe use consider the 15 or 16-ft. boat of narrow beam alongside of the 16 or 17-ft. craft wider beam. You'll find that the short: boat is relatively unstable and tricky when you try to pack anything in i! or fish from it. On an average, a 16-f canoe weighs in the neighborhood of 6 lb. It is apt to run closer to 70, althoug! last summer other prett) I used an all-wood seventeen footer that weighed (when dry) but ©: lb. All canoes take on poundage when wet. You can figure on each addition foot of length weighing about 5 Ib., but

Page 147

; ano © ‘y “Becker = down, and yet the craft had high enough gun- wales and rode so easily that one could stow away t extra foot makes it possible to chuck an exceptionally heavy load. Another inother duffle bag, as, generally speak- feature of this canoe, one which you may it adds anywhere from 65 to 75 or 80 want to consider if you are going to put of carrying capacity, depending on the your outfit through a pretty rough trip del. When in doubt, get the extra foot was the all-wood construction. Made of length, as it’s an investment in comfort three-ply birch, it surprised me to see how nd safety. The average man has no _ it would run on a sharp rock without a inkering to cruise for days withthe gun- puncture. Instead of a jagged hole result- les of his canoe too close to the water, ing from such an encounter, the pliable hen, by adding a foot in length, he can _ birch would give, and, barring the removal t easy. of varnish from a spot on the bottom, the \fter an arduous canoe trip through a canoe would be undamaged. For fishing, rgin wilderness lake region last summer, this seventeen-footer was ideal because it here there were many portages and fairly had short covered decks at each end. As ivy loads to consider, I am ready to ad- you look at a canoe in a sporting-goods e the 17-ft. flat-bottomed, all-wood ca- store, you may not give this feature a e as an ideal “buy” for the man who _ second glance. But here is how I found hes a cruising canoe that is light, steady these two compartments useful. There d able to carry a good load. Here was’ was just enough room in the covered space trip with rapids to be run, which intro- at the prow to keep my fly book, reel, rain- ices the possibility of an occasional col- shirt and tobacco pouch, and when it on with a bowlder, and a lot of duffle rained, I could reach for the shirt without he transported. To meet these require- worrying about the rest of the outfit, as ents I found a canoe that was broad-_ it had protection. imed and steady, with ends that were The seventeen-footer I used for cruis- last season had + it too high, so that windage was cut ing and wilderness travel

Page 148

POPULAR MECHANICS Two Views of a Good Wood-and-Canvas Cruising Canoe; It Has a Shallow Draft and Is Easy to Handle This disad- vantage when fishing in a wind, as it was almost impossible to hold the canoe against the breeze. The combination of flat bottom and shallow draft gives you no purchase on the water, especially without a keel. To get deeper draft, so that the no keel. was a canoe will keep its course more readily in a wind, you will find experienced lake canoeists turning to a different Lake work wide stretches of open water upon which a wind has an unobstructed and in this situation you will find the round-floored canoe quite popular. Thousands of round- type. means sweep, bottom wood-and-canvas canoes hav been bought and are being used on lake because they are the most efficient pa: dling “Injun-style” boats to be had. Bi my tip, after rocking around in many ca noes of this type, is to get plenty of lengt! and a broad beam in your lake canoe, together wit! the round bottom. Ther: is a decided tendency ¢ roll in this type of cratt you would expect any with a round botto: To counteract this, vy‘ again need length at width, those two faithtu allies of stability. In tl case of a lake canoe, the: is apt to be little portag ing, and hence you do n have to figure on weig! as One of the ““‘Two-Man”’ Nipigon Canoes of Canada, an Ideal Craft for Use on Heavy Trips in Swift Waters so closely as you do choosing an exploring c

Page 149

POPULAR MECHANICS ‘ .# i ‘y a as nie Ce i «aa Xe ——_ maak ane =. Soe melts Sung Above, 18-Ft. American Canoe for Lake Work; Note the Flat Bottom of the 17-Ft. Birch Canoe at Left which air chambers have been added on both sides, at the gunwales. These cham bers run from bow to stern and give the canoe a bulging appearance, which, how ever, you soon forget when you see how it performs. This type of canoe is ideal for the sum mer camp, for family use, and as I have indicated, for sailing, as it doesn’t tip you over on the slightest provocation. It will teeter to one side, if you don’t sit straight or if you shift your weight, but the spon- sons prevent it from going clear over So buy an eighteen-footer for lake You will find that a canoe of this type and avoid those that have ends so weighs considerably more than an ordi 1 that they look like Venetian gondolas. nary canvas or all-wood canoe of the same a windy day, those high ends act like length, and because of this fact it is not and add enormously to the difficulty suitable for a trip requiring many por teering. tages. It’s a family canoe; the last word vou want a “family” canoe, one for in safety for camp and lake purposes. ing, or one in which you don't have to Now let us see what to buy for a more tch your step every nute, don’t overlook e sponson canoe, which the safest craft in the hole canoe family. Every itdoor fan who likes the ter is ready to call the erage canoe tempera- ntal—and that’s just it itis. Some are more than others, but all be handled with e and none will brook ny liberties. But the nson is different, and sachin , —— P is the reason why: ’ a canvas canoe to Here Is a Good Cruiser Type for Two Men, Especially W Were Many Portages

Page 150

POPULAR MECHANICS |i ey 7 a Mi ge | a” he pn ee “AMOR Kg - Agel laa poe Drawings Show a Spon- son Canoe and a 16-Ft. River Model; Below Are Shown Another Cruiser, a Lake Type, and One Method of Transporting a Canoe intimate kind of paddling and ex- ploring — that found on the small age need not be c sidered, as ona sn stream or river. Although a 17-ft. flat-bottomed wood, or canvas-and-wood, will serve very well, as such a craft is at home in almost any kind of water, the very best type of canoe for winding, twisting streams that are comparatively narrow is the one that is short and of fairly narrow beam. I have had this fact driven home on a trout stream in the north This canoe woods. stream flows out of a big spring hole tucked away back in the timber about a mile from a lake into which it flows. The stream winds and twists through the tim- ber, broadening here into a pool and there rushing over rocks to make a riffle. To make.quick turns, to get around the “cor- ners” of that stream, you need a rather short, narrow canoe, one that obeys a flick of the paddle and responds instantly. Wind- stream hemmed i1 dense forest, the breezes get little or sweep. Nor is carrying capacity im] tant, for one does not ascend the str« for a day’s fishing with heavy tents duffle, such as are carried on a long cru ing trip. You will find that outdoors: naturally turn to a 16-ft. canoe for sm stream work. Sometimes they pick a noe that is 31 in. wide, sometimes a 36 beam is chosen. But always the bott should be flat for this work, as the is to get a craft that draws as little w as possible. If you want a canoe that will do for |: work as well as small-stream work, one the above-described type is not suita for it is not adapted for open-water w: Most outdoorsmen, facing the problen a so-called all-around boat, will sele

Page 151

POPULAR MECHANICS lat-bottomed canoe. Such a craft unwieldy on a small stream. isionally the outdoorsman has need large, two-man canoe with capacity—a excep- boat for ing or long-distance traveling on good-sized rivers. This demand ought into use one of the most un- and serviceable canoes to be found It is the giant wood-and-can- noe widely used on the Nipigon river nada, where swift water requires two ers and the trip involves large loads. long river trip in the north, where ien would be on the water for sev- carrying ere. ionths, with few portages, this type noe is ideal, and every outdoorsman | know about it. The boat is so wide im that two small can sit side. It is such a carry-all, that two two paddlers and hundreds unds of baggage can be transported ut trouble. Moreover, it takes the water like a bird. We have shot long rapids in this “taxicab” of the amily without trouble and without ig wet. persons engerfs, t ner or later, the beginner in canoe must face the question: Which iid I buy, a canvas or all-wood canoe? ese are the two general classes of canoes the market today. In the case of the mer, you have a boat made by covering ramework of wood with canvas. It is an all-fabric boat as the name would ply. If you want speed in your craft, etter stick to an all-wood canoe, as they generally speaking, faster than the “l-and-canvas models. Yet. in spite the all-wood type’s speed and general cticability, the wood-and-canvas craft ore popular with Americans. lf you like the sport of sailing and want canoe for this exhilarating fun, turn to e wood canoe and get acquainted with e most individual and highly specialized ll canoe models. ; 1 +] Although you can an ordinary open canoe into a sailing t, the special canoe is an all-wood boat. ch, with the exception of a cockpit the boss of the outfit, is entirely ked. But this is not its only distinctive ire. It is provided with water-tight partments so that it will not sink, t has a centerboard and a sliding seat need for the latter—a novelty in most 1027 boats—comes when the sailer hauls close to the wind so that his craft heels over. To keep it from going clear over, he slides out beyond the boat’s side where his weight offsets the dip. Concrete Poultry Nests Poultry nests made of concrete will not harbor lice, if disinfected occasionally, and a poultry man who wishes to make a num- ber of these can do so readily. The forms are made of metal, as shown, and must be oiled so that the concrete will not adhere. The mixture used is 1 part of cement to % or 3 parts of sand. When the molds are arranged in position to receive the ‘oncrete, the front or open end is up and the concrete is rammed in with a %-in. wooden rod. A piece of 4-in. wire mesh, or similar material, may be put in for rein forcement. After the nests are removed from the forms, they are covered with wet burlap for a few hours and then are im mersed in a tank or trough for at least three days, with a moderate or warm tem perature. Nests made of concrete can be easily cleaned and even burned, if desired. Concrete Poultry Nests Are Practically Lice-Proof if Disinfected Occasionally

Page 152

POPULAR MECHANICS Office on Wheels As manager of a new hotel, I have to travel between it and my old hotel ten blocks away. The new building is under construction and, the temporary office be- drivers do. The engine will warm as fast if run for a few minutes at a | erate speed as by racing it. If it i solutely necessary to warm the e up in a hurry, hang a sheet of paper the radiator to shut off the air circulat Don’t move the steering y while the car is stopped. puts a very great strain on th: tire steering mechanism, and scarcely ever necessary. The: usually room to move the car der power a few inches at and the steering wheel ca: moved much more easily and less strain on the mechanism w! the car is moving even slight] Don’t rush up to the p! where you are going to stop then slam on the brakes; them for the time when you need them more. It is just easy, and much more pleasant the passengers, to coast to point where you are going to s' and then applv the brakes ge if they are needed at all. Ger stopping is the mark of a g driver; “grand-slam” mark of a very poor one. If the car skids, leave the clut engaged, and steer the car in stops Using a Sedan as an Of- fice Which Is Fitted with an Improvised Desk ing dusty and dirty, I found it more con- venient to use my sedan as an office when prospective tenants arrived at the new ho- tel. To facilitate writing, I arranged a sort of desk as shown in the drawing. It con- sists of a smooth board, hooked across the sides in front of the rear seat, special fit- tings being provided for this purpose. In the evening the lights are turned on and meals can be served if desired.—John F. Daschner, New York City. Pointers for the New Auto Driver Never, under any circumstances, race your engine, especially when new. More engines are ruined by racing than are worn out by proper driving. Besides, there is no sensible reason for racing the engine, even to warm it up, aS many direction the car is skiddit That is, if the rear wheels skid the right, turn the front whee! the right side also. Turning th to the left will only aggravate the s! On slippery surfaces, if it is necessar) apply the brakes, apply them gent} intermittently, and leave the clutc! while the brakes are used. This will duce the tendency to skid. Use the motor as a brake when go downhill. That is, leave the clutch and keep the throttle closed. Keep switch on. Apply the hand and f brakes alternately if the hill is a long « to keep the brake linings cool and red: wear. If the hill is a very steep one, st at the top, change down into second ¢ and go down using the motor as a br: Don’t try to pass another car o1 curve, on a hill, at a street intersect! or anywhere else where the view of road ahead is obstructed in any w There might be another car coming

Page 153

POPULAR MECHANICS there is, t not have room to avoid him. ther direction, and if you e the best oil you can buy for your ie, remembering that it is the cheap- n the long run. Follow the maker's uctions about lubricating the car fully; if you lubricate every part of ar twice as often as he recommends, all to your own advantage. eep your foot off the clutch pedal ex- when you want to throw it out. ling the clutch” will only result in a ir bill sooner or later. ill in all cuts on tires with “tire dough,” revent moisture reaching the interior e casing and rotting the fabric. uu will find many nuts and bolt heads unpainted. Paint these at e with a quick-drying enamel to pre- rust and subsequent bad appearance. underneath the car and paint all the iinted can and while ire there, oil all the brake connections, the car spots you see, steam-cylinder oil, not engine oil. e heavy oil stays on and lubricates these nections better. ighten the body bolts after the first } miles and go over them every 1,000 es after that. Examine all screws and Its about the body periodically and keep em tight, to prevent squeaks and rattles long as possible. Tighten up spring ps after the first 500 miles also, alter that see that they are kept tight. and Holding the Teakettle Bail Many teakettles are made with no provision for hold- ing the handle in an upright posi- tion, and burned fingers often re- sult. A simple remedy for this is to file notches in each ear of the kettle, as shown in the illustration. A small round file is used for this pur- pose. | FILED OUT La saond y This allows he upper and lower sides of the bail loops t# enter the slots, so that the handle will be supported perpendicularly.—G, E. Hen- ckson, Argyle, Wis. 1029 To Keep a Tent Warm Overnight To keep a tent warm all day or night several methods can be used. One is to dig a hole in the ground inside the tent, Heating the Campers’ Tent during Cold Weather In- creases Comfort fill it with hot coals from the campfire and then cover it with an inverted bucket. If desired, the next beans can be cooked by burying the can in the hot coals and letting it lie there overnight. To keep a slow-burning fire in a sheet-iron day’s ration of stove requires the use of a minimum of draft. First build a hot fire in the stove, to get a good bed of red-hot coals. Then fill the stove with pieces of logs as large as it will hold, give it a small draft, and the fire will burn for a long time —Claude P. Fordyce, Falls City, Nebr. Method of Saving Gas-Tank Gasket on Late-Model Ford Autos The late-model Ford gasoline-tank caps are supplied with a loose cork gasket seal- ing the joint between the cap and the tank, to prevent loss of gasoline. The gasket is easily broken or lost, and at most service stations both cap and gasket would have ] to be purchased as the The cemented to the cap sold should be vith shellac and the exposed side should be dusted with graph itter is not separately. loose gasket ite or tire mica to give a smooth surface and avoid tearing it.—E. T. Humboldt, Iowa. Gunderson,

Page 154

1030 x9 METAL eh {s L Z4 5” 2% SLOTTED<- R =D - SLIDING MEMBER \ A ak SLIDING MEMBER Ss - BIT CONTAINER BOTTOM VIEW “~ OF TABLE Homemade Drill Press, That Costs No More than About $1.50, Will Be Found Useful in Any Small Workshop Small Drill Press for Home Workshop An ordinary small hand drill can be used to make the drill press shown in the draw- ing. It cost $1.35 and all the other material did not exceed 20 cents. The standard, to which attachments are screwed for holding the drill, is made of 1l-in. wood, and the base, which is provided with a clamp so that it can be fastened to the edge of the workbench, is made of the same material. The sliding member and the screw, which and lowers the drill, can be clearly seen in the illustration, as well as the raises 7 HOLES FOR FEED SCREW POPULAR MECHANICS from the workbench hang it on the wall w! itis out of the way.—! Hutchison, Dallas, Te Cleaning Weeds from Brick Walks Any home owner to an arti brick walk, knows vw what it means to try kill off the weeds wl will grow between t bricks after the wall a few years old. To t to pull them seems o: possess

A betterand more pra

a little powdered blu stone in the joints | tween the bricks. W! it rains, this substan: DRILL SUPPORT POST to increase their growt!| tical method is to sprink! has had the good fortun: e will kill all weed grow!! for some time and in many cases they w not appear until another season, places. Keep the bluestone away from t! edges of the walks, or it will kill the gra Summer Garage In our small lot, where space was rat! limited, we wanted to have a grape arl: and rose trellis, and also a place to stor the car overnight. There was not enou: whet seeds are carried by the wind from distant space for both, so we combined the tw: by putting a roof on a grape trellis, ; shown in t]

other construc- tional details. Two window- shade supports are fastened to the standard to hold the bit container. The drill press is es- pecially handy because of its «mall size. When through

photo. Bot ends of t! structure left open to low the car be driven in: out easily. this way made a gara: which was ¢ tirely satisf tory dur! the summer we

using it, one can remove it Grape Arbor, Rose Trellis and Summer Garage Combined Form a Practical and Pleasing Addition to the Back Yard H.N. Drio, ! inboro, Pa.

Page 155

A Square-Rigger for the Boy By HI SIBLEY 7] [E vogue for model craft which has tiently worked for weeks on the intricate unched ten thousand ships has left rigging and delicate trim,of the “Santa youngsters somewhat unenthusiastic, Maria” or the “Half Moon,” he is ready the reason that these picturesque little to go to the other extreme and make a terpieces cannot be tried out in the simple ship. tub. “Gee, that’s keen!” they say The “Southern Cross,” here illustrated, n shown a new model, and then ask, combines extreme simplicity with great | it float ?” seaworthiness. There is not a single un iter the model shipbuilder has pa necessary item in its entire construction, CUT WITH COPING OR —- JIG SAW TOP VIEW OF HULL _ tae Towa ef CORNERS ) BOW DETAIL PLANED AWAY } \ METHOD OF ASSEMBLING HULL | Here Is an Easily Made Model of a Square-Rigger That Will Really Sail, and That Will Provide Endless Amusement for Any Boy

Page 156

POPULAR MECHANICS SPANKER SAIL ———_- ____-¥ * ASSEMBLED VIEW OF SHIP vegies METHOD OF FASTENING SAILS TO YARDS \, The proper amount of ballast is portant. This size model will take al: '4 lb. of lead on each side of the keel, t! is, 1 lb. altogether. Make your own m: Two pieces of board, nailed at right ang), with wood blocks or putty at the ends | FORE &MIZZEN MAST -- NAILS, BLOCK OR ‘ _ ( PUTTY FOR MAINMAST MAKING BALLAST =a» 8; ALL MASTS \ >| ~ wood BLOCK~. METHOD OF ATTACHING BALLAST BALLAST - y, -~ DARNING NEEDLE —— £ — Oa “= Details of the Model “Southern Cross’; While Ex- tremely Simple, It Is Very Realistic, and Satisfies the oy’s Desire for “One That Will Float’ yet it is a very fair model of an old-time square-rigger and rides like a swan. It can be pulled over onto its beam ends, until half the sails are wet, and will right itself at once. Old salts may be some- what amused at its queer rigging, but it must be borne in mind that the “Southern Cross” was designed for easy construction and sturdiness to stand rough usage in the hands of a hard-riding young skipper. The hull is roughed out with a coping saw, which also is used to cut away the inside of the central block. Attach the bottom piece and deck to the central block, using glue and nails. Then round off bottom corners and stern overhang with a plane, chisel or drawknife. Next put on the wedge-shaped bow and stern pieces to give the deck the proper sheer or curve fore and aft. The masts are made from %-in. dowel sticks, tapered with a plane, and the bow- sprit from %-in. dowels. Bore holes for these but do not set them until after the keelboard is fitted. CAPSTAN - — §"— HAY WIRE ~ 4 PICTURE_- CHAIN Ac GALVANIZED IRON —-- stops, will do nicely. Set three or fou: nails upright in the mold in order to mak: holes in the ballast pieces to fasten thei to hull. The wood mold must be abs: lutely level when pouring from the ladl: When cold, cut the lead into two equa pieces and finish the rough edges with file. Nail on both sides of keel, just little back of center, in order to keep t! bow higher than the stern. For the rudder post, use about “« dowel, and bore a %-in., or larger, h to receive it, so that it will still be loo enough when the dampness swells it. A extra item, though not necessary, is t! wood cowl over the top of the rudde post, carrying a small clock gear as dummy steering wheel. This, of cours: can be left off entirely. Yards should be cut from %-in. dow: sticks, and tapered to each end with t!

Page 157

POPULAR M each yard should be % in. shorter the one directly below it. Yards, ts, bowsprit and deck should be given sat of orange shellac. iint the hull a bright vermilion below water line, and green or black above. e two coats of these colors, ground in n, then one coat of spar varnish. 1e dimensions of the sails given allow 4-in. hem all around. When the are set and the yards slung to the sts, go over the strings with a coat of ellac to keep them in place. } Novel Method of Growing Strawberries It would seem impossible to grow 1,500 rawberry plants properly on a plot of und 12 by 26 ft. in dimensions. A nce at the photo shows how this has en done, however. A number of con- ete blocks, 3 ft. long, 2 ft. high and 15 wide at the bottom, were cast, the forms ing made from old dry-goods boxes. he blocks were made hollow, with a solid Muffin tins were attached to the itside to make the holes in the sides. he making and fitting of the forms, which ere collapsible, was the most difficult irt of the work, especially the inner one. Vhen finished, the blocks were filled with rt and the strawberry plants inserted, nein each hole. The roots were watered pushing a broom handle down into the lirt and pouring water or fertilizer into e holes thus made. With this arrange- ment much more area obtained for rowing the berries, no dirt gets on them, there is no weeding to be done, and it is easy to clip the runners. To prevent birds se is Growing 1,500 Strawberry Plants in a Small Backyard, in Concrete Blocks om visiting the patch, it is an easy matter 'o cover the block with netting. ECHANICS Grinding Juicy Substances with Food Chopper If an ordinary food chopper is used to grind juicy substances, trouble is often ex- Inclined Food Chopper Prevents Leakage at Handle perienced with the juice leaking out at the crank. Screwing the chopper in an inclined position, as indicated, causes all the drainage to take place at the other end. This can be done by providing a triangular strip on the chopper and cut- ting a nick in the edge of the bench, or by clamping on a board which is inclined. Both alternatives are shown in the illustra- tion.—A. Stenson, Gardena, Calif. Filling the Auto Gas Tank Many motorists blame gasoline for be- ing poor when the trouble lies in the gas- oline at the service station. The hose is often hung onto the tank with the nozzle up. Imme- diately after a rain the water will get into the hose and when the gas- oline is poured into the auto tank the water also gets in. hose Many times the hose is nearly half full of rain water and the motorist is always anxious to get the amount of gas in the hose, not knowing that some of it water. Therefore it is a good idea, when purchasing gas, to make sure that the water is run out of the hose before putting the gas into the tank.—Charles Latour, Jr., Plattsburg, N. Y. is Hollow

Page 158

1034 A Rack on the Inside of the Pantry Door Will Increase Storage Possibilities Considerably Making More Room in the Pantry In small apartments or houses where space is limited, the inside of pantry doors and closets offers storage possibilities. The photo shows a homemade rack ac- commodating about twenty kitchen uten- sils. It is a three-sided affair, the door itself forming the fourth side. are driven Screweyes into the two ends and front side to hold a number of utensils. Holes are drilled in a wooden strip nailed to the front on the inside, to hold a pair of scis- sors, pliers and similarly shaped devices. A hole is also drilled in the top of one of the ends to hold a funnel. The front is made of that one can see the storage space behind, which is used for egg beaters, etc., piled in loosely. Just be- low the main rack a carving set is sup- ported at its ends by two vertical blocks, having holes drilled for this purpose. A third block, with a slit in it, serves as a guard to protect the point of the carving knife. A pencil sharpener is mounted be- low, where it is within easy reach of the children. The arrangement shown is sug- gestive only and may be modified.—L. I. Thomas, Oak Park, IIl. slats so POPULAR MECHANICS Old Films Start Fires [f you intend camping out this vear, } sure to include in your equipment as mar old camera films as you think you y need, for although they won’t take pictur: for you, they will often enable you to get a good dinner in a hurry. You will find them particularly useful for starting a { on damp and dull days. While a mate! will splutter and go out, the film is high! inflammable, so after getting the wood al! piled to start the fire, stick a piece of film in among the starting twigs and light that instead of the twigs themselves. You wi be rewarded with a hot blaze that burt long enough to give the average fire start. You can easily carry all the filn vou need in an envelope, and should the get damp, a handkerchief will wipe the: off so that a match will light them.—H. A White, Cedar Rapids, Iowa. Fastener for Wire Gate Stretched wire gates, so much used, are greatly improved and made more secure against being opened by the stock by using an S-shaped piece of strap iron, about 1 ft. long, as shown. This enables one to open and close the gate with one hand, which is often handy when carrying some- thing. Fora light gate a piece of old buggy tire or simi- lar flat iron will do. Drilltwo holes near one end to receive nails, which hold it in place on the post, as shown in the illustra tion.—J. S. Ward, Alamo, Tex. s &- Salvaging Stained Chamois Skin Chamois skin that is heavily stained wit! paint and oil may be salvaged in a very simple manner. Soak the skin in a pail of rain water, to which has been added gill of strong ammonia, for a period 0!

Page 159

ut 12 hours, after which it should be hed out in tepid water (not hot) with - soap. This puts the skin in better dition than when it is new, for the lint been removed, and better work can lone with it than before. 4 jjusting Carburetor for Altitude Driving he first thought of the autoist on driv- in high mountains is that, on account the lowered air pressure, he must in- ease the flow of gas to the carburetor. is, however, will be found to choke the rburetor and slow down the speed. The rrect way is to admit less gas to the car- retor to make the gas mixture of the me proportions as at sea level. As the itude increases above the mile limit you ould gradually close down the gas sup- . to keep the motor running evenly and e carburetor from choking and smoking. Wire Rack Holds Doors and Windows lo keep doors and hinged windows open nd prevent them from being closed by he wind, either of the simple holders own in the drawing will be found ef- fective. One consists of a length of heavy ilvanized-iron wire, bent as indicated nd attached to the lintel above the door o that it will hold the door at any point. \ window or door catch made of spring ire, such as bicycle or motorcycle wheel pokes, is shown-in the lower detail.—V. Hodruss, Port of Spain, Trinidad, B. W. I. TOP OF DOOR, BENT WIRE, ‘ ‘ ‘ ‘ ‘ * Wire Holders and Catches Hold Doors and Windows Securely against the Wind POPULAR MECHANICS 1035 Handy Manuscript Holder for Speakers Many speakers use small notebooks in which to write speeches, but the manu- script holder shown in the drawing has Handy Manuscript Holder Is Made from Film Spools, Lengths of Wire and Rub- ber Bands MANUSCRIPT ——~—7 BOTTOM VIEW OF MANUSCRIPT HOLDER = = WIRE“ RUBBER BAND | been found much handier. It consists of a frame, made of two lengths of No. 12 galvanized-iron wire, and two rubber bands arranged to hold two camera film spools. A roll of paper, the same width as the spools, is obtained and the lecture or speech written on it. The ends are cut to a tapered point so that they can readily be inserted in the film holders and the strip of paper is then rolled on one of the spools. It is an easy matter to wind up the strip on the empty spool, and, when finished, a rubber band can be snapped around the spool and the lecture can be filed for future use.—R. M. Thomas, Denver, Colo. Preventing Putty Marks on Ground Glass Objectionable marks on ground glass, when glazing a window frame, are made by the oil in putty, and are very difficult to remove. The best and simplest way to prevent them is to rub soap on the edges of the glass before the putty is applied, so that the film will keep all stains from the glass.

Page 160

1036 POPULAR Changing Balloon Tires Anyone who has undertaken to change a balloon tire on the road has found the job troublesome with the use of the ordi- Lo alll eaieeeeieeealll Co mB se: Lessening the Usual Difficulty Experienced with a Jack When Changing Balloon Tires nary jack furnished with the car. Much of this is due to the difficulty of placing the jack under the axle with the little clearance available when a balloon tire is flat. It is also due to the long lift that is necessary to raise the car high enough to remove the flat tire. The method illus- trated overcomes these troubles. The spare tire is first removed from the carrier and placed directly ahead of the flat tire which is to be changed. The car is then driven slowly forward so that the flat tire rides on the spare. In this position, it is easy to place the jack under the axle, and only a little effort is required to raise the wheel so that the flat tire can be removed. The spare is then lifted up and placed into position for service. Softener for Paintbrushes Keeping paintbrushes soft between jobs is one of the bugbears of the home painter. Those that have become rock-hard will probably have to be thrown away, but as long as one shows any pliability, it can be brought back to normal as follows: Mix equal portions of raw linseed oil and gas- oline and place in a can deeper than the MECHANICS total length of the brush. Immerse t!] brush part and put cover on can. In 24 hours, the bristles will be sufficiently soft ened to allow the gum to be worked out : with the hand, whereupon the brush : finally cleaned by washing in pure gasolin | , ; Preserving Battery Carriers | The band of some battery carriers, uw der the center of the battery, is usual covered with red, rough rust which is likel to wear into the bottom of the battery case If the battery is in a metal box, this doe not occur, but there are many rubber cased batteries in use which are not placed in a box, and also many wood-cased bat teries. The battery-carrier band should be wrapped with one or two layers of fri: tion tape; this will wear through in time of course, and also rot if acid reaches but will prevent wear on the bottom. Homemade Renewable Fuse Plug \ renewable fuse plug can be made from a two-piece attachment shown. Obtain a spool of fuse wire of suff- cient strength to take care of the local 110- volt 60-cycle supply, and place a short length across the prong terminals of the plug unit. The screw part of the plug is then turned into the socket and the prong unit pushed in place. If the fuse blows, it is easily renewed. plug, as Cleaning Phonograph Turntables After considerable use the green-ie!t covering of a phonograph will becom: soiled with grease from the hands and from dirt picked up from the records them selves. One of the best cleansers for thi is ether. Buy a few cents worth at th: drug store and, moistening a clean rag with just a little of the fluid, rub the felt briskly, and the dirt will disappear as if by magic. Ether leaves no stain, the odo! soon disappears and the felt looks like new

Page 161

9000059 | = . v 4 ae ' if ? ; ' ~ sae ae | ~» | xX 7% eS All Shop Notes published in 1926, in book form—Fifty Cents—from our Book Department A Hot-Flame Blowpipe for the Shop By H. W. PHILLIPS }* frequently happens that a very hot flame is needed for a short time in the «perimental shop for melting small quan- ties of metal, welding, etc. In such cases e apparatus described in this article will irnish intense heat at once. It is simple nd the expense of making and using it is ight. It is merely the old-time chemical- boratory gas generator adapted for use j j i 3 \() OPPERS - ifr ST / _— —- FF INNER = CONTAINER | —} OXONE — +-TUBE turning it into an oxy-hydrocarbon flame. The outer container may be any sort of vessel that will hold water a tin can of any sort. Tin friction-top containers are excellent. The top of this is closed with a plug, of wood, cork, or even plaster of paris. This stopper has a hole in the center to admit the inner tube or container, which ; a mason jar or holds the “oxygen cubes” commercially called “oxone.” This tube may also be of any suitable material, even WIRE SCREEN ~--4--+- 7 BLOW- PIPE A Couple of Small Containers, a Length 2 f Tubing with a Blow- : pipe Tip, an Alcohol Lamp SS ind a g, pply of Oxone Provide the Experimenter with an In- tensely Hot Flame n supplying a stream of oxygen to SYS SN. the ordinary blowpipe frame, thus 1037

Page 162

1038 paper that has been waterproofed by soak- ing in paraffin, if nothing else is at hand. About 1 in. from the lower end of the inner tube is placed a disk cut from screen wire, slightly larger than the inside diam- eter of the tube, so that the edge may be bent over, holding the disk in position by pressure. This disk keeps the lumps of oxone out of reach of the water in the outer container until the gas is needed. A piece of metal tubing to run through the plug of the inner container, a length of rubber tubing and a stop clip, such as used on fountain syringes and obtainable in any drug store, and a common, so-called jewelers’ blowpipe, costing a few cents, complete the list of material. If the plugs for the tubes are to be made of plaster, the easiest procedure is to first pour the mixed plaster in a paper box, larger than the diameter of the outer tube. When the plaster has become a little firm, but before it has set hard, grease the edge of the tube, and cut the plug as you would a biscuit. Then shake the plug out, and cut another for the inner tube. Next, push the center tube through the inner-con- tainer plug. The plugs must fit snugly, but yet be easily removable. In operation, the outer container is filled about halfway with water, and the plug replaced. The plug of the inner tube is removed, and some lumps of oxone dropped on the wire screen. Then, first making sure that the spring clip on the rubber tube is closed, so that no air can pass through, the inner tube is put in po- sition. Atmospheric pressure prevents the water from reaching the oxone until the spring clip is opened. When it is opened, water flows up into the inner tube, reaches the oxone and generates oxy- gen with sufficient pressure to be asa blowpipe stream. used Any sort of flame may be used; candle, alcohol or plain kerosene. A lamp with flat wick is preferable, the flame being blown the long way of the wick. As you are now dealing with straight oxygen, the heat obtained will surprise you; it is quite comparable to the oxyacetylene or hydro- gen flame. Oxone may be chemical dealers, for a 2-lb. can. obtained from large and about $1.60 It keeps very well, if the lid of the can is tightly replaced. costs I have POPULAR MECHANICS had a can for five months and the materi shows no deterioration. Oxone is sodium peroxide. The wate after use, is a strong solution of caust soda, so do not get it on your hands « clothes. I saved some of the solutio: in a tightly stoppered bottle, as a stron: alkaline solution often comes in hand for getting rid of grease. Iron in small form, either cast o1 wrought, melts easily in the flame. B proper manipulation, and in a closed fur nace, small castings can be made. Eve platinum (of course in very small quan tity) will yield. All the interesting oxygen experiment can be performed, by using a fruit jar in the bottom of which is put about ™% in of sand or ashes, and then pour ina couple of inches of water. Drop a lump of oxone in, and there’s your oxygen. Phosphorus burns in oxygen with light like the sun. A watch spring or other high-carbon steel will also burn to demonstrate this, first draw the tempe: of the spring by heating it, straighten it wire a match to the end, strike the match plunge into your jar of oxygen, and thx spring burns with a brilliant light, small globules of melted steel and oxide falling to the bottom of the jar. There is noth- ing dangerous about a little oxygen. Substitute for Focusing Cloth Most photographers how un handy it is to use a focusing cloth, espe know Old Bellows Is an Excellent Substitute for Focusing Cloth and Gives Good Results cially when taking outdoor photos in th wind. By using an extra bellows fron a discarded camera and attaching an eye shade to it, as shown in the illustration the focusing cloth can be dispensed

Page 163

POPULAR MECHANICS The small bellows on the end serves as a lens shade, enting light from falling on lens.—Leonard Eilers, Bur- Calif. ubstitute for Frosted Glass e breaking of a very large window found us le to get another in town be- -e of its size. An immediate icement was imperative, for glass was a part of the parti- of a doctor’s private rooms. finally hit upon an idea that ed the problem easily. A new glass was fitted in place and ed to remove grease and dirt. en, with a clean brush, the s was given a coat of white varnish on one side. After wing it to stand half an hour, applied flour, finely sifted and from lumps. ted-glass The flour was AUTO-CUSHION SPRING — ----~-~- ted on and the surplus wiped with a light sweeping move- ent. The result was as good in appear- ce as the other frosted glasses in the rtition. When the varnish had dried, ther coat was applied to waterproof it. H. E. Walker, Herkimer, N. Y. Conveyor Loads Lumber on Flat Cars Considerable space and time are saved a lumber mill by the installation of a ouble-track overhead-conveyor system, r loading lumber on flat cars, as shown Adjustable Creeper Headrest, Supported on a Coil Spring, Provides Comfort for the Auto Mechanic Spring Headrest Makes Creeper More Comfortable When using a rolling creeper for any length of time there is considerable strain on the muscles of the neck and shoulders, as the worker must often raise his head, unsupported, to see how to manipulate the tools. The spring headrest shown in the illustration will be found an effective rem edy for this. The center board is fitted with a padded headrest on one end, is the photo. Vhile one con- eyor is eee Ree be- ig unloaded n one side of e flat car, the ther is loaded, nd is then ought in po- tion for un- ding while e empty one Both racks converge }a single track utside of the Caves. hinged in the middle, and a discarded auto- cushion spring is fastened be tween the head- rest and the crosspiece. When reclining upon this creeper, the workman can force the head- rest down, or by relaxing, al- ading space. Western Sawmill Uses Overhead-Conveyor System to Load Flat Cars Quickly low it to sup- port his head.

Page 164

POPULAR — PIN FOR HOLDING CHUCK WHILE —__ INSERTING TOOLS ~ E RIVET HOLES | CUTAWAY = Ge » | . MOTOR 5 SHAFT. am HOLES IN SHANK TO FIT LUGS Flexible Shaft for Doing Light Drilling, Grinding and Buffing by Motor Drive Flexible Shaft for Small Tools For the home workshop, a flexible shaft for driving small tools electrically from a stationary motor will be found of consid- utility. It consists of a speedom- eter shaft, a drill chuck and a \-hp. motor. Cut off the square end of a shank and rivet the latter to the endpiece of the speedom- eter-shaft chain, the lugs on the latter fit- ting holes that are drilled in the shank. File a slot in the end of the motor shaft, to receive the lug on the fitting at the other end of the chain, and drill a hole through both for a cotter pin. Also drill a hole in the shank of the chuck for a pin to hold the chuck while tools are inserted.—]. Augustus Prendiville, Southboro, Mass. erable Convenient Opening in a Fence In places along a fence where a farmer or rancher often goes through, but where he does not wish to place a gate, a simple device may be installed. Buy some round- eve swivel snaps, or use old ones that have been discarded around the barn, one for each wire in the fence. If the opening is made at a wooden post the snap is nailed on with a staple, but if a steel post is in use a wire is used in attaching the snap. In each case the snap should be stationary, MECHANICS and should replace the staple original used to hold the wire to the post. When one wishes to pass this place that is necessary to do is to open the sna withdraw the wire and hold the wire do while the horse or vehicle passes. It very easy to snap the wire back, and t} saves much time, as otherwise it would | necessary to pull out the staples to loos: the fence. Fire Extinguisher Operated Automatically A western manufacturer of electric-m tor coils had to keep constant against fires in the varnish arranged extinguishers as shown, would tip over automatically and sprinkle their contents out through a length perforated pipe. Each of the extinguishei is supported by two lengths of strap iro which are screwed or bolted to an ove: head beam and drilled through the lowe: end. A circular strap-iron band is clampe securely around the extinguisher well be low the center. Pins, riveted through eac! side of the band, serve to pivot in the hol drilled in the strap-iron supports, Whe thus arranged, the extinguisher is top heavy, but it is held in a nearly vertic position by means of a wire, soldered the bottom and attached to the beam, a shown. This is cut in half and a lengt! of fusible wire inserted, which, wher fuat rooms an whicl BRACKET ON_BEAM BRACKET ON JOIST \ 4 \ eY . 4 SPRINKLER ¢ PIPE Ordinary Fire Extinguisher Tips Over Automatica! hen Heat Becomes Excessive

Page 165

ted, allows the extinguisher to The rubber hose is con- ted to a sprinkler pipe running rough the drying troughs. uld a fire start, the heat will t the fusible wire. This re- ses the overhead extinguisher, ich tips over, thus breaking the container and creating the ssure to force the contents out the sprinkler pipes and quench e fire at the start. ver. Placing Brush Cover Bands Che brush cover bands on Ford and generators are mped in place by a screw draw- tarters e the two ears together, one on each end of the cover band. There a '4-in. gap between the ends of the band when clamped in place. this gap happens to be placed er one of the openings in the nerator or starter yoke, dust | dirt will be admitted. re, the There- band must be laced with the gap over the metal of the ke, and between the openings giving ac- cess to the commutator. The first models the Ford starting system have a solid over band, which rongly—E,. T. cover cannot be Gunderson, Jr., placed Hum- voldt, Towa. Repairing Lawn Mower To repair a p of a lawn mower, housing in the wheel 1 arilled a 3¢-in. hole in the pawl and a hole in the casting, threaded the latte ‘ole with a -in. tap and then screwed in a 3-in. bolt from the inside so that the pawl piv- the bolt. Two nuts oted on are used in- tead of one to lock them on the bolt ithout bind- ing against he casting. le writer “la mower with four of the six pawls tted in this way for a whole season.— Oscar Boding, Crosby, N. Dak. POPULAR MECHANICS Barbed-Wire vents Cattle from Break- ing Wooden Farm Gate Rack Pre- ? || GATE? eS Farm-Gate Protector Prevents Cattle from Breaking It Wooden gates used between fields are likely to be broken down by cattle trying to reach over them to get at fodder in the next field. This trouble can be prevented by hooking a barbed-wire protector over the gate, as shown in the illustration. It consists of a wooden frame, with the wire applied as indicated in the lower detail, and two pieces of flat iron bent to form hooks, which are slipped over the gate. It is placed on the gate so that the barbed-wire section is on the side where the cattle are, and will effectively prevent reaching over. them from In the drawing, however, the protector is set on the wrong side to make the arrangement plainly visible. Removing Scratches from Plate Glass Scratches in plate glass can be polished out easily in the following manner: Mix powdered chalk, 60 parts; tripoli, 30 parts, and bole, 15 parts, to a fine powder. Dip a wet, soft cloth in the above preparation, and rub the scratched spot until it has disappeared. The method is, of course, not applicable to very deep scratches.

Page 166

POPULAR MECHANICS Device Paints Boards Quickly At a western woodworking plant it was necessary to prime a large quantity of pine siding. In order to do this as quickly as possible, the painting device shown in the photo was made. It enabled two men to paint 1,000 pieces of 6-in. siding, 8 ft. long, in five hours. A i. sheet-metal trough, about 3 ft. long, 1 ft. wide and 1 ft. deep, is mounted on strong metal legs and two sets of rollers, between which the boards are passed, are arranged in PAINTED ! SIDE as indicated. Three of the rollers are of metal, while the fourth is wood with a covering of carpet tacked on. This rolls in the paint and applies it to the underside of the board as it is pushed through. A large brush near the other end, also on the underside of the board and inside of the trough, removes surplus paint and assures a neat, smooth job. Be- sides the timesaving feature, all waste of and above it. paint is avoided by using this device — Jos. C. Coyle, Denver, Colo. How to Protect Your Trees against Mice and Rabbits Here is a kink that costs nothing and is worth many dollars to orchard men. Go toa railway siding where cedar ties have been peeled, gather up a quantity of the bark and cut it into 18-in. lengths. Drive strips of bark into the soil around BRUSH REMOVES SURPLUS PAINT~’ Machine Used by Western Woodworking Plant for Painting Large Quantit of Siding; It Does the Work Quickly and Wastes No Paint the tree trunks and tie a cord arou: their tops. As the bark is light, a lar quantity can easily be carried in a bus basket. It will be partly curled by sun, if the ties or poles have been pee sometime previously, and this curvat: will make it fit the tree trunks. I h:; tried tar paper, wire screen, etc., for same purpose, but this suits me best costs the least. Leave the bark in pl: summer and winter. Bugs will not hib: nate in it. The growth of the tree stretch the twine for two or three years | til it breaks. The bark, if it is stuck \ into the soil, will still stand as long as tree needs it—five or six years, until o7a——c~ METAL ROLLERS te gy it 1 ‘i i 1 | WOODEN ROLLER COVEREL A “—— WITH CARPET APPLIES ~ PAINT TO BOARDS PAINT ; ; ae : danger from mice and rabbits is past. | were located where cedar bark was available, I would use cedar stakes, s| from old telephone poles, railroad ties fence posts, in the same way. Cedar shi gles would also answer the purpose, with the thick end down.—J. H. Den ton, Bayfield, Wis. Crude Oil as Wood Stain A wood stain with many practical u in the laboratory or workshop can made from crude petroleum. Mixture it with gasoline in varying proportio! will give stains for the softer woods imitation of practically anyth from light, golden oak to a dark walni Oils from different districts have differ« characteristics, and the right proporti will have to be found by experiment. 1 gasoline evaporates quickly and leaves | good

Page 167

POPULAR \d with a dull finish. Polished effects be obtained with the usual methods other stains, but a cheap and durable sh is realized by applying hot beeswax h a brush and rubbing off the excess 1 a soft muslin cloth. Such stains are ful for shop or other furniture that is bject to hard usage, as they are cheap, e high penetration, keep the wood- irk neat, and act as a preservative. For laboratory tables or storage-battery irkbenches, where an acid and water- sof coating is desired, the following can used: Apply a generous coat of boiling- t unmixed crude oil with a brush. If » wood is well seasoned and porous, ap- a second coat. A finishing coat of a tt half-and-half mixture of crude oil and eeswax should be applied, and the ex- ss oil and wax rubbed off with rags or iste. A blowtorch or Bunsen flame laved over the surface of the wood to keep it hot will assist this rubbing oper- tion. The resistance of this coating even hot concentrated acids as encountered chemical analyses is surprising. Care ust be taken, however, as hot crude oil inflammable and therefore large quan- ties should not be heated over a flame. Wrench for Bending Small Pipe When no pipe-bvending table or wheel is illable, the work can be done by means of an ordinary large-size monkey wrench, with a hole drilled through the jaws as the illus- The outer edges of the hole are chamfered off with a file. Usually it will be found best to hold the pipe in a vise, but sometimes the handle of the wrench may be gripped in it to better advantage. . Bends of dif- erent radii are made by regulating the istance between the jaws of the vise and he wrench. shown in tration. A 1-in. hole will accommo- ite pipe up to 34-in. iron size, the largest to which this method can practically be pplied.—O. S. Sprout, Lancaster, Pa. MECHANICS [ PLUG CONNECTION TO HOSE, TIRE VALVE ~ emt’) Rae " PACKING--’ STEXHAUST TO oe FE a | nm | CARBURETOR BREATHER ~* 2 Air Pressure Applied to Auto Cylinder Locates Com- pression Losses Quickly Compression Loss Detected by Air Test Compression leakage in an auto engine is sometimes difficult to locate. Contrib- utory causes, as warped valves, worn or stuck piston rings and broken gaskets, are not easily detected by inspection of the parts. The drawing shows a method of de termining accurately the loss of compres sion in a cylinder, by means of a special plug made from the shell of a spark plug and a valve stem from an inner tube. The piston is placed at the bottom of the com pression stroke, air pressure is applied and the mechanic listens for the hiss of leaking air. If this is audible at the breather pipe, the piston rings are at fault; if it occurs through the carburetor, the intake valve is leaking, and if it can be heard through the muffler, the exhaust valve is the of fending member.—G. A. Luers, Wash ington, D. C. @A type cleaner for typewriters which has proved entirely satisfactory consists of carbon tetrachloride, 95 parts, and ammonia, 5 parts; it is applied with a brush, and the type should be rubbed wit! it until it is clean.

Page 168

WAIS to stone, floor and a dash colorful design on the cei ing beams, which lends |} to the whole. When Oskar J. W. H sen, a sculptor, wanted t convert an old barn into studio of real distinctio: he found a simple way |! which the costly meth: of European constructi: could be reproduced. T! accompanying pictur show the results obtaine: and the method is ama ingly simple. All it r quires isa careful attentio to the details described The first thing is t] “stone” work: After have removed the old wal! paper or calcimine fro: the walls and ceiling th: are ready for the work begin. As you will from the photograph t! stone work can be varie Applying the Stain for the “Parquet” Floor; Note How the Glass Is Held in height and design to So the Stain Will Not “Blot” y around the doors and wit + es possess a Castle in Spain may seem dows. The rest of the walls and ceili: a very unattainable dream; but when _ should be in a fairly simple rough plast: the plain, drab four-square walls of any texture. This gives a solid feeling of bal room may be made to reflect the variety, ance to the room and at the same tin dignity and charm of an old-world in- provides a wall of interesting variety. terior by a small expenditure and effort The plaster material used as a found on your part, you lend substance to the _ tion for this stone mixture is called mar! stuff of your dreams. l-cote B. To a gallon of boiling wat: The buildings of Europe seem to have add enough of this powder to make a m' grown out of the ages. They have that ture the consistency of cream. Then n livable feeling which is the real mark of in, slowly, enough plaster of paris to m a home. This charm is produced by the a thick paste. Stir this paste until it successful combination of a great variety free from lumps, and it is then ready to | of building materials. There is the pic- applied to the wall. This should be don turesque strength of stone masonry, the - at once, while it is still soft and warm. intricate designs of wrought-iron hinges With a pencil, draw a rough outline « and lock plates, the mellow rough texture’ the wall to show the height and shape of aged woods, the infinite variety of rough your stone work, and then with a s! plastered walls, the parqueted, or perhaps, square plasterers’ trowel spread on t! 1044

Page 169

View of Corner Studio, Showing the Effect of the Floor, the “Stone Work,” the Rough Door Texture and the “‘Wrought-Iron’”’ Hinges and Latch on the Door iste fairly evenly and about % in. thick. tter it has hardened for about fifteen min- ites, take a stiff small brush or a whisk- om and, with a sidewise motion of the ind, make scratches all over the surface the plaster. the paste, the rougher the texture. For a sandstone effect, let the mix get quite hard on the wall before brushing The next step is to mark off the joints between the stones. It is better to make Ever so often. pound the’ the stones of varying sizes and rush in straight and then pull it away. and this is done by me of the material will follow the brush d leave rough holes and marks on the ll. In this way you can produce any nd of stone effect you wish. shapes, simply dragging a small modeling tool along a straight guid ing stick \ modeling tool for this pur pose can be made out of a round stick, 6 The softer in. long and % in. thick. Make one end

Page 170

POPULAR MECHANICS ee, Another Door, with Simpler Hinges and Ornamental Frieze on the Lintel; Below, Close-Up of Door flat and pointed and the other end oval and rounded. With this tool you can model anything you wish. While the plaster is still soft, you may even want to model into the center of some of the stones some simple design of a flower or a ro- sette. When the plaster gets dry, these designs look like stone carvings. In the same manner you may model an orna- mental lintel for the top of door openings or an ornamental shelf for the fireplace. You do not need to do all this in one day, as the material joins easily to itself. When all the stone work is done, let it dry for at least two days. Then do the coloring. While the walls drying, you can get o1 your work by making imitation wrought-ir, hardware. Leave you old hardware on ar model over it. The mi ture for this work is same as for the walls « cept that you put in mo: marb-l-cote and but small quantity of plaste: of paris. This will gi you a mixture which withstand the constant! vibrations of opening an: shutting the doors. T! mixture should also lx made a little stiffer tha for the walls. For th: design of your hinge you may either use thos: of the accompanying illustration, desis some yourself, or consult illustrated boo! on ancient buildings at the public librari You will find a wealth of designs to cho from. paper and then transfer them to the doo! First draw the designs on traci!

Page 171

a ii RW es SSS“ Wy the door is heavily varnished, the sur- ce should be scratched with a | ndpaper so as to give a “tooth” for the plaster. After transferring the design onto the door, drive a few small large-headed ils into the wood and let the heads stick ut about 4 in. Now spread the warm plaster mixture onto your design, to the thickness you want vour hinge, and let it set for a while. When it begins to get ird, fasten your tracing paper over the plaster and cut through to the wood with small penknife. In this way you will get sharp outline of your work. Then you in imitate hammered-iron effects by us- ng the rounded end of your modeling tool nd squeezing dents into the plaster, and ith some softer material put ia the rough nail heads” in their appropriate places. ’o not do this work of modeling too care- ( illy; leave it a little rough and crude— looks more genuine that way. The inges should now dry for at least two iys. During this time you may antique coarse POPULAR MECHANICS 1047 View Showing How the Stone-Work Design Is Carried around Window Openings in Irregular Yet Unified and Highly Artistic Style the woodwork and walls and ceiling The mixture same as add enough water to make it very thin thinner than for the walls—and apply it rough-coat the up for the woodwork is the for the hardware except that you to the wood with a medium-sized paint brush. By stippling it on the wood you will get a texture of roughness which you may twist or turn of the brush now to suit your fancy. be done with the upper walls and the ceil ing. They can be made a little rougher than the walls but not too much so; it is nice rough even with a and then The same thing can vary better to keep them fairly plain so as to make a contrast with the stone. The whole room is now allowed to dry and then vou can proceed with the coloring. To color the stone work, apply first one coat of a light cream-colored flat enamel When this is dry, a thin mixture of turpentine, burnt umber in oil, and add just a little raw sienna and lemon-vellow make

Page 172

POPULAR Put the colors into the turpentine very slowly and a small quantity at atime. Stir until they are thoroughly dissolved. Try on a small sample until you have the cor- rect shade. Now begin to color each stone in the wall by itself. Rub into the texture a quantity of the color mixture with a small paintbrush and, while it is still wet, rub off enough with a soft rag to leave the stone of the desired color. In this way you can vary the tones of the indi- vidual stones according to how much color you allow to remain. It is also a good idea to save some of the cream-colored enamel and from time to time stick your brush into it and then into the umber mixture. In this way you will give some of the stones a sort of warm gray, dusty finish that is very agreeable. For the woodwork of a Spanish or Ital- ian interior, pistachio green makes a very leasing color contrast. Pistachio green db MECHANICS is made by painting yo: woodwork with two coa of flat enamel colored light blue. Cobalt blu: into white makes the righ color. When this is dr brush on the same kind of color mixture that you used for the finish of the stones and wipe off wit a soft cloth. The umbe: mixture will turn the blu: into a soft mysterious shade of green, and th: slight roughness pro duced by the marb-l-cot: finish retains enough o' the darker coloring t: give the wood an age mellow appearance. Th finish grows more beaut ful with age. You can now make th hardware a dark dusty brown by allowing the umber mixture to dry o1 without wiping. Then after it is dry, add a fev touches of raw sienna t: give a rusty effect and ; few touches of red to the nail heads for the purpos« of color accents. The upper parts of the walls and ceiling should be done in a soft grayish shade of tan, to harmonize wit! the stone work. They can be given adde: interest by makinga thin mixture of orang: and then dipping the points of a sponge into the color and touching the spong: very lightly to the wall. A faint touch « color like that gives the wall a deep v: brant feeling, while at the same time it apparently very plain and severe. If th: ceiling has beams, they can be stenciled i: some quaint old pattern, but it is equal satisfactory to leave them plain. The room is now all finished except the floor. A very distinguished-looking floo: can be made by staining an ordinary oa! floor with dark squares. The size of th: squares should vary with the size of the room, 12 to 18 in. being the average size After the floor is finished in the ordina manner (do not attempt this finish ove: varnish), the squares are measured oft — A Glimpse of the Plasterboard Ceiling Beams; the Windows Here Formerly Lighted the Horse Stalls in the Barn

Page 173

1 POPULAR MECHANICS marked on the wood in pencil. Care ild be taken to have them come out even as possible on all sides of the m. For the light squares the wood is in the natural color, while every other ire is stained dark in checkerboard ion. The effect is a floor almost equal ‘he finest parquet. The handling of the etrating stain so as to get sharp lines ‘hout blotting into the light squares uires careful attention to the method d. A piece of glass, a few inches longer n the square, and a new 1%-in. rubber- flat brush are used to apply the stain. e glass is held at an angle of 45, as wn in the illustration. The brush is ped in the stain and wiped almost dry the center of the square to be stained; n, with a steady motion of the hand, ne is made along the glass on each of four sides of the square. The secret to keep the wrush almost dry. The nter of the square is then carefully ushed in. (he cost of such a floor is just about Coin or Washer Stacker A useful tool for stacking piles of sim- ilar coins or washers can be made of sheet metal, bent as shown in the drawing. The stacker is pulledthrough a pile of coins or washers and will pile up several at each pull. By pushing the tool backward, the pile thus collected will be left stand- ing by itself. To stack with- out counting the pieces, the pile picked up at each move- one-tenth of a real parquet floor, and the ppearance is about the same. After the in is dry the floor is either varnished or ixed the same as any ordinary floor. A small Oriental rugs will complete the cture. The room will look spacious and elegant and will always seem inviting for dances and entertainments. With the fine reproductions of period furniture which e now so cheaply and easily obtained, ou can carry out’the rest of the ensemble to Handle and become the proud possessor of an \onest-to-goodness Castle in Spain. A large eastern railroad has applied a ; pair of brake shoes to all of its platform ee baggage trucks to prevent them from be- Remedy for Slipping Tractor Belt acaths E ing moved when the handle is raised and hooked. The brake shoes are a pair of wooden blocks bolted to the cross- piece on the handle. Besides preventing of tape areund the movement of the center of the fan ge / truck when it is not pulley and the pulley A MAY YW in use, the brakes onthe engine crank- Z haft. This provides riction and causes the belt to ride in the center. ment can be left as itis. If it is desired to count as well as stack, the tool should be made the proper height to hold a certain number of pieces. If the stacker is not filled by pulling it through the pile, a few extra coins or washers can be quickly added with the fingers. Brakes Make Hand Trucks Safe Tractors travel so slowly in comparison ith the speed of the engine, that a slip- ping fan belt will in- variably cause an erheated engine. 'o prevent slipping, rap several turns also will control the movement of a truck under a heavy load on an inclined Brakes on Railway-Station Trucks Prevent Them from surface. Moving When Not in Use

Page 174

1050 Simple Tool Made of 14-In. Wire Mesh, to Give Rough Finish to Plaster Stipple Trowel for Rough-Surfacing Walls During the construction of a new house I watched the interior finishers give the plaster a rough finish. The tool used for this purpose was made by folding over a piece of wire mesh and attaching it to a wooden handle. By twisting, patting or stroking the tool over the plaster attractive finishes were produced. The tool of the very simplest construction. It was found that “%-in. wire mesh, 6 in. wide and 24 in. long, was best suited to the pur- pose. The ends were tapered to fit the handle, and then the strip of wire was doubled over lengthwise so that the ends could be tacked to the handle, as shown in the illustration and details —L. B. Rob- bins, Harwich, Mass. was Painting over Keene’s Cement To paint or enamel over Keene’s cement successfully, the painting must be done at the latest within 24 hours after the plas- terers have finished their work. The rea- son for this is that this cement is very sen- sitive to moisture and, though apparently dry, will absorb all of it present in the atmosphere. When the cement has ab- sorbed moisture, it is impossible to keep the paint from running when it is applied. This is quite enough to prevent any chance of doing a perfect job. POPULAR MECHANICS Effect of Temperature on Steel Tapes The United States temperature standard for steel measuring tapes is 68° F. The standard tension for a steel tape, 50 long, supported throughout on a ho: zontal flat surface, is 10 lb. The coefficien: of expansion of steel tapes, as determin by the bureau of standards, is .00000645 jn per degree Fahrenheit. This means th steel tapes change by that fraction of thei: length for each degree rise or fall in ten perature. This figures out, for a 50-f; tape, to an increase in length of .00387 i: for 1° rise in temperature, and the tape is shorter by the same amount for 1° drop Wheel Sign for Delivery Cars The wheel disk shown in the drawing does not revolve with the wheel, but stands still, and the wheels appear as if they were sliding along. The disk is made of me dium-gauge tin, and is cut the size of the wheel without the tire. A %-in. hole drilled in the end of the hub cap, a 1-in stove bolt is inserted through the hole from the inside, a nut is screwed on it at the outside, and the disk is then put in place. Two nuts are screwed onto the end of the bolt to secure the disk. The first nut is not screwed up tight and the second nut locks the first. A piece of strap iro: BOLT AND NUTS. Uy ““STRAP -IRON BALLAST ON BACK OF DISK Signs on Automobile Wheels Remain Stationary Whi the Wheels Rotate

Page 175

POPULAR MECHANICS veted to the lower side of the disk, on nside, and acts as a ballast to keep the from turning with the wheel. This es an attractive sign, which can be | whether the car is moving or stand- still—Thos. F. Johnson, Cuero, Tex. id Blast Removes Paint from Wicker Furniture \ hen it is necessary to repaint reed or e furniture, it is nearly impossible to ove the old paint. An Indiana bus com- v experiencing this trouble, solved the blem by means of sand blasting. The d was applied at a 45-lb. pressure, to event cutting the reeds, and care was en not to keep the blast on one spot long. The same method was used to iove paint from canvas roofs. Emergency Repair for Stripped Valve-Stem Thread Due to excess pressure and hard usage, team-valve connection in a small paper- making plant was stripped, resulting in continued es- cape of steam. It was impossible to cut out the line, and to make a quick emergency repair, the method shown in the illus- tration was used. A rough clamp formed from a piece of heavy flat iron to fit the valve, and a hole was drilled and tapped through i or a threaded screw, which was made irom an iron rod and bent. Obviously the ime repair is applicable to screw-down ucets or valves in water lines. was Air-Pressure Test on Radiators A good method of testing a repaired idiator consists in immersing it in a vat water and then pumping air into it. \n ordinary tire pump is attached to a pecial filler cap, which screws onto the Safe Method of Applying Air Pres- sure to Auto Radiator without Bursting It filling opening. To eliminate the danger of damaging the radiator by too high pressure, one repair shop has adopted the safety measure shown in the illustration. An inner tube is used as a reservoir for the air and also acts as a gauge to show the amount of pressure. The top opening or inlet is closed with a rubber gasket, the overflow pipe is corked, a gasket is used in the filler-pipe cap and the tube reser- voir is connected to the bottom radiator outlet, as indicated. In this way the ra- diator is fully protected. Holding Ink Bottle on Drawing Board About the simplest way in which the ink bottle can be held on a tilted drawing board is that shown in the il- lustration. One end of a string is tied around the neck of the bottle and the other end is fastened to the upper edge of the board with a thumbtack. The bottle will not slip even though the board is set at a steep angle.

Page 176

POPULAR MECHANICS Portable Air Compressor Made from Junk-Pile Parts When digging up asphalt road for re- pairs on the street-car tracks, it was found Air Compressor Made from Electric Motor, Compressor, Switch Taken from a Discarded Street-Car Truck that, although the air drills were not very costly, the price of an air compressor ex- ceeded the sum available. The road-main- tenance mechanic studied the problem for a time and then went to the junk pile, where he found a discarded street-car truck and enough other parts to make a com- pressor. The motor is electrically driven, connection being made with the trolley wire by means of a hooked conductor. The air pump is controlled by means of an automatic switch, which stops the pump motor when the air in the tanks reaches the maximum pressure. lation-size air hose lead to the drills, which have inter- changeable bits for either breaking up the roadbed or tamping up cross ties. The com- pressor was mount- ed on an old auto chassis so that it could easily be towed from place to place. The designer claims that the de- vice cost much less than the manufac- tured air compres- Lengths of regu- Tank and Automatic }_& ate a Var machine is made from a short length flexible conductor clamped to an old-fas ioned smoothing iron. down, on the track rail. It can be seen i; the photo under the truck on the groun The conductor pole is along the top and th: drills rest on the side. This is set, face Sill as Guide for Car Doors Some of the older Ford closed cars were not fitte« with rollers on the doo: frame nor wastherea pro jection onitto prevent th door from sagging slight ly and striking on the si beneath the door when closing. The hinges o1 doors of this kind wi bend after long use because of the weight Doors to which this has happened can be improved, after straightening the hinge: by cutting a little wood from under the metal plate on the sill. This is done at the outer edge only and causes the plate to incline downward where the corner of the door would strike it, tending to lift and guide the door when being closed. The wood is removed for about 2 in. at th: point where the sill curves upward at the catch side of the door. Substitute for Draftsman’s Quill When the cork i left out of the draw- ing-ink bottle, the quill will invariab! curl, so that it doe not reach the in! and then it is nec essary to shake th bottle in order t: load the quill. A good remed against this troub|: is to cut off the qui! and replace it wit! a ball-pointed pei as shown, whic! ) will always reac! Hh "Wj CP WLM ie y~ QQ’ W/),/// by D mm my Wiper sors. The ground connection for the Ball-Pointed Pen Eliminates Trouble Experienced from Curled Quills the bottom of th bottle.

Page 177

POPULAR MECHANICS Keeping Battery Cable in Place hen the battery cable loses its grip on post and jumps off, trouble may result, to the intermittent connection as the vibrates. To overcome this, drill and . small hole in the center of the post. n lay a washer, large enough to cover | post and cable ring, over this hole and ‘n it with a machine screw threaded n into the tapped hole. This will pre- t the cable from jumping off, but it can emoved by taking out the screw and ping off the washer. Gasoline-Pump Extension 1 order to comply with the regulations small city where the location of gaso- pumps on the curb is_ prohibited, garage owner installed the pump next his garage and provided an extension, shown in the drawing. A swinging nt was attached to the top of the pump | a suitable length of pipe was fitted to the joint to extend horizontally to a ition just above the curb. A guy wire used to support the pipe so that it FAY Overhead Extension on Gasoline Pump Where Curb Location Was Prohibited uld be extended over the curb when re- ‘ired and swung against the side of the irage after use. An elbow was fitted at e end of the pipe and the hose was at- ched as indicated in the drawing.—J. S. ‘agans, Chicago, II. Quick Production Method of Turning Tapered Plugs for Boiler Flues How to Turn Small Wooden Plugs Making little round wooden plugs for boiler flues was a tedious task when ordi- nary hand methods were employed, but with the simple device shown in the draw- ing, they can be turned out very quickly. A small circular saw, on an 8-in. section of brass mandrel, is screwed onto the shaft of the high-speed motor which runs the lathe. A tapering hole, 4 in. long, with a slot in one side, is drilled into the end of the mandrel, and a cutting blade is screwed to the edge of the slot at the same angle as the taper. The device works like a small pencil sharpener. After the plugs are turned, they are pushed against a small spring gauge attached to the side of the motor and severed with the saw. A chute guides the plugs into a barrel.—Jos. C. Coyle, Denver, Colo. Release for Milk-Can Cover When putting a cover on a filled milk can, it is often found that it goes down hard and with a tendency to spring up, especially if the can is well filled. This is due to the compressed air under the cover. To remedy this, drill a small hole in the cover, conveniently near the handle, and fit it with a cork. Then remove the cork when putting on the cover and replace it when the air has escaped.

Page 178

POPULAR MECHANICS rap ee ee oy WIRE LATH \LATH STRIPS ‘FLOOR JOIST Preventing Plaster from Cracking along Floor Joists near Top of Stairway To Prevent Plaster from Cracking Plaster often cracks where it covers the floor joist that runs along the top of the stairway, because it will not anchor se- curely on the joist. To prevent this, nail short lengths of lath on the joist verti- cally and then apply a strip of metal lath. This provides some space for the plaster to work behind the metal lath, and it will never crack. Another weak spot is in corners, especially under stairways. This trouble can also be remedied by applying a strip of metal lath, bent to conform to the corner, as shown in the illustration.— Robert Page Lincoln, Minneapolis, Minn. Overhead Bracket for Ignition Wiring Special battery-ignition systems _ for Ford cars have a bracket held under one of the cylinder-head capscrews, for spark- plug wires. These brackets are rather short, and the wires are held close to the top of the motor, where they are exposed to the heat, and are in the way when spark plugs must be removed. The _ bracket should be hung from the radiator stay rod, leaving plenty of space for work on the plugs, and holding the wires farther from the heat. A steel strip, 1 in. wide, % in. thick and of a length depending on the model of the car and the make of the ig- nition system, and two clamps like those of the gas-feed pipe are used for this pur- pose. A hole is drilled in one end of the strip and the two feed-pipe clamps are bolted to it and clamped to the stay rod The bracket for the wires is inverted, the wiring put through it, and the bracket set at the proper height to take up the slack in the wires. The steel strip is then bent at right angles and a hole is drilled for the bracket, which is bolted to it. The strip is again bent to extend down to a cylinder- head capscrew on the left-hand side, and finally a hole drilled through the strip for the screw.—E. T. Gunderson, Jr., Hum boldt, Iowa. Uses for Old Auto Plates Old auto plate numbers can be used to good advantage as shown in the draw- ing. Cut the plates with a hacksaw or heavy tin shears and use the numbers for rural mail boxes, for sprinkler systems o1 for house numbers. They are large and plain, which makes them especially suit able for these purposes. To attach them, it may be necessary to punch holes and wire them in place, as around pipes, or FOR RURAL , MAIL BOXES ? FOR HOUSE NUMBERS Lt Old Automobile Numbers Can Be Put to Many Ne¢ Uses, Such as Illustrated Here they can be riveted to thin metal surfac« such as a mail box, while, if they are to |) used on a wooden surface, such as a por: post, nailing will do.—Truman R. Ha: Ashtabula, Ohio.

Page 179

POPULAR Cane Tube for Fly-Rod Tips dinarily the tips of a fly rod are car- with the rest of the sections of the na cloth case. While they are not broken, they must nevertheless re- e special attention while being carried it. A special tube that can be made ome and that will protect the tips from ig broken consists of a piece of ordi- cane pole cut long enough to accom- ate the sections of the rod. The in- of the tube should be at least % in. liameter and the obstructions at the ts can be removed with a \4%-in. chisel couge attached to the end of a hard- d stick. After the obstructions have n removed, the inside surface of the ibe should be smoothed down, which can done by means of some emery cloth ked to the end of the stick. A wooden ug is glued in one end of the cane and a k is inserted at the other end. If de- ed, the threaded section of a narrow- k can may be cut off and tacked on the so that a screwcap can be used in- 1 tead of the cork, and this is less likely be accidentally lost. The tube is slipped to the cloth case along with the thicker ctions of the rod. Rails as Guides for Endless Chain \t a large southern sawmill using a eavy endless chain to pull logs from the ( nd up into e mill house, guide or rack for the returning 1 nade hain was of rail- wayrails. Any nN t T umber of ils can be oupled to- ether, laying hem side by le as shown the draw- ng. The lags the chain lide on the ‘ils beside em, while the vertical links pass between the rails and prevent the chain from twist- g—L. M. Jordan, Vredenburgh, Ala. MECHANICS Chute Attached to Bench Makes Disposal of Bench Litter Easy, and Helps Pre- vent Loss of Small Parts Trash Box under Bench Is Aid in Small Shop The open can or box generally used for sweepings from the bench in a small shop has one great disadvantage: that small tools and parts may easily drop into it un- noticed. A box and chute that has all the advantages of the open-top box and none of its disadvantages is shown in the illustration. The construction of the chute itself is simple and is quite plain from the drawing. It is hinged to one of the crosspieces of the bench, as indicated, and is normally held under the bench by means of a strong spring attached to the rear edge. To use, the upper edge of the chute is pulled out and the trash swept into it. It will be noticed that the chute is not attached to the box, and conse- quently the trash can be thrown out with- out disturbing the former. Sidetracking Engine Gases When an automobile engine becomes worn from much use, some of the gas leaks by the rings and is discharged through the breather pipe, thus finding its way into the car body, making the air foul. To stop this, one autoist attached a flexible metal conduit to the breather-pipe open- ing and a short piece of rubber hose to the other end of the conduit. This hose was led outside under the engine hood and dis- charges all the gases into the air.

Page 180

Is This Your Home? Copyright, Architects’ Small House Service Bureau Plan No. 5A23 UESTIONS regarding home buildin close self-addressed stamped envelope for reply. sample plans. tained for 20 cents. addressed to this magazine will be answered by The Architects Small House Service Bureau of the United States, Inc., controlled by the American Institute of Archi- tects and endorsed by the United States department of commerce. Blueprints, specifications and material list for the house shown here may be obtained at nominal cost. In- If further information is desired, send 5c and stamped envelope for a 24-page booklet explaining how the Small House Service Bureau functions and showing 12 A new booklet, entitled “Fifty Ways to Lower Home Building Costs,” bureau houses actually lived in, and showing how as much as $1,000 can be saved on a home, may be ob- Inclose 10c and self-addressed envelope illustrated by ten HE home illustrated above will glad- den the hearts of home builders be- cause of its spacious, comfortable, con- veniently arranged plan. It is designed on simple, effective lines, that insure its being moderate in building cost and pleas- ing in appearance. The fireplace in the living room and the combination built-in dining-room_ buffet and kitchen cabinet are features that will increase value and convenience beyond the money they cost. It is a well-known fact also that a fireplace adds considerably to the selling value of a house. The kitchen is arranged after that of a design chosen from a national competi- tion. However expertly this may have been designed to eliminate extra steps, many-persons prefer to have the sink un- der the outside wall. The plans therefore provide an alternative drawing for such an arrangement of the fixtures. 1056 There is a built-in buffet in the dining room. Graceful plaster arches betwee: the dining room and vestibule and thi living room and vestibule lend an unusua charm to these rooms as well as give the: the spacious open effect so much desired The working drawings call for fra construction, brick front steps, shingle or composition roof, and exterior finish o! stucco, although siding or shingles ma be used with good effect. Home Builders’ Questions Q. What makes a fireplace smoke? How do yo fix it? A. The flue may be too small, or crooked it may be filled with soot. Also, the throat may he small or the fireplace may be too high for its de; Clean the flue; put in a mechanical throat; build the back hearth one course of brick—get a contract to tell you which We wish to buy some property in our city. H: far back is it necessary to trace the title? A. The stract of title should be carried back to the original 2 of the land from the government. Make sure that ev transaction has been closed and that all claims agai the property have been satisfied legally.

Page 181

POPULAR MECHANICS ADVERTISING SECTION OrganizeaBand NE interest- ed person can start a band, and withConn’shelp, car- ry it through to success. Our Band Service De- Y partment will hclp ee \ organize a band or orchestra now, among your associates. In industries, schools, scout troops, legion posts, lodges, com- munities, wherever there is a group of fellows, there is an opportunity for a band. Our easy payment plan provides complete equipment of instru- ments at a small outlay per month. Summer time is band time. Get started now by writing the Conn Band Service Depart- ment for complete details —no obligation. Mail T. Cc. G. CONN, ! 431 Conn Bldg., Elkhart, Ind. Gentlemen: "lease send literature and de- tails of trial *¥er on the instrument I have indicated. I am interested in organizing a [{ } band or ( } orchestra. Please have your Band Service Department advise me. \ Conn Makes it Easy Y Dodge Brothers, Inc., Concert Band of Detroit, Mich., Eugene LaBarre, con- ductor. This is one of the fa- mous industrial bands complete- Weqve with instru- ments. Y Exclusive Conn Features The world’s largest plant devoted to band instruments, with exclusive machinery and processes, enables Conn to produce the world’s finest instruments; easiest to play, beautiful in tone, perfect in mechanism. One Conn process, the famous hydraulic ex- pansion of tapering tubes, called for an in- vestment ofa half million dollars. Unlimited resources in capital, machinery and expert skill are at the base of Conn quality. FREE TRIAL, Easy Payments. Send coupon now for free literature and details of trial offer on cornet, trumpet, trombone, saxophone, clarinet, flute, drums—any instru- ment for band or orchestra. No obligation, send TODAY. INSTRUMENTS WORLD'S LARGEST MANUFACTURERS {Instrument}. Name. St. or R. F. D. City, State County

Page 182

POPULAR MECHANICS ADVERTISING SECTION For that clean-cut look of success try this invigorating massage after shaving UCCESSFUL men look the part. They are clean shaven, clean cut, and well groomed. They have that glowing look of health and vitality. A muddy, half-clean, blackhead-dotted skin can never be a partner of the successful man. Yet you can have the clean and healthy look of success. It takes no extra time. It can be acquired easily and pleasantly. After you shave, use Pompeian Massage Cream. You usually use something after shaving—hot towel, lotion, or cream—to remove the dirt and clinging soap Make this convincing hand test free! Wash your hands thoroughly. Rub a little Pompeian Massage Cream into the back of your hand until the cream first disap- pears, then comes out again. Notice this — the cream goes in pink and comes out black! particles that become imbedded in the skin Water, lotions, soaps—all reach the surface only. They do not remove imbedded dirt and secretions. Pompeian Massage Cream does Use this pleasant, gentle cream after shav- ing. See how your skin takes on the glow of life and action. See how imbedded dirt, even blackheads, rolls out under the mild but efficient urge of this massage, quickly applied in your own home. You will like its restful, zestful “feel.’”” Above all, you will like it for the feeling it gives you that — by gosh you really are clean. The black is dirt that you could not r move by washing. You can make this simple but convincing test today. Get a jar of Pompeian Massage Cream at any drug store for sixty cents. If you prefer to make the test before you buy, merely mail the coupon below. POMPEIAN MASSAGE CREAM Increases Your Face FREE--TO MEN ONLY The Pompeian Company, Dept. 46A, Cleveland, Ohio. Please send me free, the sample tube of Pompeian Massage Cream, with enough cream to make the hand test, and to give me several massages. Name Street City. Value

Page 183

skin, irface tand does. shav- glow | dirt, id but yplied estful, ike it gosh!

Popular Mechanics Magazine 200 E. Ontario Street, Chicago, U.S. A. H. H. WINDSOR, Founder H. H. WINDSOR, Jr., Editor and Publisher London: Hachette & Cie., Paris: Hachette & Cie., Melbourne: Gordon & Gotch 16-17 King William Street, Charing Cross, W.C. 2 111 Rue Reaumur 509-513 Little Collins St. —————

ISSUED MONTHLY SUBSCRIPTION: SINGLE COPY, 25 CENTS Soe ee ee SS anette, aed Marien, gar gum, Gael - $2.50 To all other countries in the Postal Union - . ° . = .«, aoe All subscriptions are discontinued at expiration. ieiintiiiende des ddusbesveeees Entered as Second Class Matter Sept. 15, 1903, Coe mete pp aor pana Illinois, under Act of March 3rd, 1879. Entered as Second Class Matter at the Post Office Department, Canada Published monthly by POPULAR MECHANICS CO. Copyright, 1927, by Popular Mechanics Co. Copyright in Australia. Copyright in France

Vol. 47 Contents for June, 1927 No. 6 Acoustics—walls padded with paper disks to stop echoes 973 Fish Advertising—imitation tree stump as real-estate sign 946 ornamental raised at unique college 886 Airplanes rescue work saves .................005: Kee 975 from raw material to planes ................. .. 903 Flashlight—electric in cane bwkwens 999 rum chasing have machine guns ............... 930 Fog—lights carried by traffic police ............ 905 Airship Dermeee——-pertaeee Wt GEE... ww. ccc ccccces 939 dirigible combined with plane .............. 914 Garbage—chimney fed incinerator ............... 976 fiving Uncle Sam’s gas bags .................. 906 Gate—opened by auto bumper ................. 968 —s. 2 | aA eo eee 929 C=O GU GROUT .. . 6. oc ccc eccccesesess 932 Alarm Clock—memo pad for ................... 893 Glass—age of may follow steel ................. 973 Animals—sail lizard discovered ............... 897 Gold—old days to return _.... 0... eee ee eee eeee 881 Army U. S.—soldier and his weapons 912 Golf Astronomy—heaviest star “‘27"” weighed at observatory 977 LL eer rer 916 Automobiles hand — holds club 957 electric eye to count . 943 where millions of balls go 970 guard dropped over wheels protects pedestrian. 967 Hair—structure of human clue to identity 951 tiny electric roadster 887 Hair Cutting—ear guard while having hair bobbed 960 Automobiles—Driving—cause of auto ecueeed is “hu- Hammer—drill makes its own power from gasoline 993 man element”’ 984 Heater—electric fits on wall 923 Automobiles—Equipment and a Horticulture—garden under glass bells 943 match and ash holder eo 915 House Plan 1056 seat for infant .. ane . 924 Household Devices 814 Automobiles—Racing—flirting with death saa 888 Hydroelectric Plants—Shannon river power plant 989 t...0Ul.”l”:C RE ee .. 895 Idol—South sea mystery solved by finding lost 956 Automobiles—Tires—branding eee 945 Illumination Automobiles—Windshields lights on theater tower rival those of streets 944 kept clear with chemical wiper................. 929 street lamps tested 901 two blade wiper 943 Iron—making in African wilds 961 Aviation—ground wire leads planes to safety in fog. 1000 Kites—solve problem of tree seeds’ flight 955 Bank—women in trained to chnet 14 Knives—cutlery from old wire rope 923 Batteries—doll’s head that lights up novelty 959 Lamp Shade—ostrich feather 928 Beaver—wild life refuge in Alaska to protect 957 Life—value of human . 974 Boats and Boating—fishes’ secret sought to add speed. 900 Life Insurance—more risk in play than in work 952 Boys—taller today than fifty years ago 974 Lighthouse—church spire as 915 Bridge—sand boxes lift Carquinez in place .......... 986 Lions—the man-eaters 917 Building Log—fifty thousand year old found 924 home built with wrench ..................... 904 a raises seventy-five tons 977 home of concrete and glass ................. 969 Medicine Man—of North Siberia wears odd garb 992 house on wedge-shaped lot .................. 994 Metals—iridium hardest, thallium softest 946 OMRCG OE GUE ID sc nico sc cies cease ceecns 962 Mint rae ey age | a Japanese industry to U. S.. 941 seventy-story labor temple proposed ......... 985 Mirror—for bus conductors 940 Butter—treating cream with lime to ~peeees - 937 Models—castle of live trees for garden 995 Cactus—Giant—home for screech owls a fa 924 Money—paper to be smaller 928 Cats—patrol capitol 959 Motor Bus—like street car has two engines 913 Cement Gun—aids in building semicircular roof .. 959 Motor Truck Chalk Line—with _- bob . 989 SE ers eee eee oe 944 Chalk Talk—invisible patterns make easy 996 CU: .. 5. cas wrenecepaheweees 950 China—spirit of ancient clings to soldiers with um- tank for trout 937 brellas 898 Motorboat—sets new record 958 Clarinet-—metal will not crack athe . 885 Motorcycles—tilting bucket in race 952 Clock—radio world time ....................... 1004 Moving Pictures—films enlarged without cutting reel. 985 Concrete Bandstand—ice used to lower floor .... 931 Navy S.—underground storage for explosives 930 Concrete Nettles—fibers used for cloth in China 928 ROGER Ss) onc hia ga aetna awe, Wha 942 Occupations—more musicians in U. S. than lawyers 915 CG I oor oh wks daekoe ate kscumouns te 939 Omnibus—steam burns oil 927 Cork—puller removes caps ..............-e.000:: 940 Painting (Art)—trare found hidden on brick wall 896 Cowboy—roping oe on ce alt Bian aah ik bight adios 902 Paints and Painting—weather wheel tests 961 Dam—giant net protects penstocks a Park—benches built for two 913 Deaf—sound amplifier for ...........-......eee0-0s 936 Pencil—adding is accurate 974 matth—tnelt GE GN wo. nt cnc deccccecsce 904 Phonograph—changes disks and plays for an hour 938 Education Plumbing and Steamfitting—truck carries supplies 945 electric questionnai®speeds study ............. 931 Police—motor cops of the sea 947 pupils make own glcve as geography aid ........ 967 Postage Stamps—printed by the mile 901 Electric Wiring—locator for Ws 961 Pump Elevator—up Mont Blanc ... 924 Rostrte drive for 696 Fire—forest extinguisher worn like knapsack 977 for bottles simplifies oiling and eltenttind 992 Fire Towers—lofty guard Canada’s forests 993 run by Flettner rotor 937 [Continued on Page 4]

Page 184

Radio Aerials directional effects from outdoor 1011 fishing poles as masts 1010 homemade decorative loop 1003 keep away from power lines 1009 simple lead-in arrangement 1011 Radio Apparatus—adjustable gridleak without pressure contacts Radio Application code tor medical aid at sea 985 detects automobile noises 1014 “magic” locates buried riches 989 replaces St. Bernards in Alps 915 reproducing phonograph records through receiver. 1014 Radio Batteries booster charger has high and low rate 1013 power unit eliminates all 1005 simplifies connections 1010 Radio Broadcasting—Japan’s largest station 1012 Radio Coils convenient form for 1013 homemade low loss 1009 homemade R. F. choke 1010 new wire provides air spaced winding 1003 Radio Construction dull finish for panels 1013 improved method of shielding receiver 1004 mounting panel on baseboard 1004 shock absorbing tube mounting 1009 Radio Loud Speaker—repairing diaphragm 1009 Radio Receiver for blind 887 resembles cash register 1011 Radio Reception—weather in relation to DX 1001 Radio Repairing—binding frayed insulation 1004 Radio Tubes automatic tester 913 how to check r. f. 1012 new high MU increases volume 1010 use old for testing 1003 Railroad—to Lichtenstein castle 957 Rays—things made invisible by colored 968 Razor—sharp flints used for in New Zealand 974 Rifle Practice—shooting at moving pictures 958 Rivets—electric heater ap 995 Roads—truck for center-lining 1000 Rubber Edison joins hunt for rubber that can be raised here 916 lumber for aircraft 938 molded into dolls 901 Safety Devices and Measures steel cable in windy canyon protects pedestrians 951 train lights crossing sign 999 Saws—portable electric link 946 Sculpture—artist turns wood blocks into masterpieces. 894 Seashells flowers and faces of 905 portrait carving on 951 Shaving Brush—removable bristle, easily dried 884 Ships—caring for the liner 902 Smoke—density of tested with chart 953 Smokers’ Accessories cigar lighter quick action 945 trapdoor ash tray 931 Smokestacks—old ships’ protect railroad roadbed 995 Sprinkler—spray watering outfit 960 Steeple—old without church Swedish landmark 973 Stool—adjustable locks with steel balls 1000 Street Car—window heater for 945 Street Cleaning—streets of old Rome swept with mod- ern sweepers 953 Surfboard—air chamber in makes it unsinkable 969 Table—extension drafting 928 Tractor—runs sorghum mill unattended 972 Traffic—electric eye to count autos 943 Trees—saving uprooted shade 930 Tunnel Moffat completed 925 smoke bombs in test ventilation 897 Typewriter Supplies—carbon paper in cushion back . 959 Umbrella—vanishing strap, easy to carry 885 Vacuum Cleaner—airing bag attached to 962 Ventilator—proof against draft and dust 988 Walnuts—cracker for black 972 War—secrets revealed 978 Waterways—Inland—how father of waters is coming back 963 Well—forecasts storms Wine Cask—ancient German holds 50,000 gallons Yoke—cut by Lincoln prized relic Zoological Garden—*“‘jungle” for zoo animals planned. 958 [4] [Contents—Continued] AMATEUR MECHANICS Automobile—converted into office Automobiles—Driving—adjusting carburetor for “ tude Automobiles—Equipment and Supplies es eg Sag, | tonneau seat 1018 lock for Ford coupe 1017 Automobiles—Fuel—filling tank 1033 Automobiles—Tires—changing balloon 1036 Bathing—trolley for 1019 Battery. eserving carriers 1036 Boats and Boating—how to calk small boat 1018 Camping—how to make a baker for 1015 Canoe—how to pick your 1923 Children—concrete sand box for 1020 Chopper—food, grinding juicy substances 1033 Cleaning—removing scorch mark from linen 1021 Coaster—four wheel brake on 1017 Drain Pipe—simple repair for 1019 Fishing—digging worms with electricity 1016 Fuse Plug—homemade renewable 1036 Garage radiators automatically blanketed 1021 summer 1030 Gardening—novel method of growing strawberries 1033 Gasoline—saving tank gasket 1029 Gate—fastener for wire 1034 Lamp—combined with picture frame 1016 Lawn Sprayer—simple 1018 Manuscript—holder for speakers 1035 Paintbrushes—softener for 1036 Pantry—making more room in 1034 Phonograph—cleaning turntables 1036 Poultry—nests of concrete 1027 Putty—preventing marks on ground glass 1035 Quilts—locating knots on 1017 Ship Models making deadeyes for a 1021 square-rigger for the boy : 1031 Tent—heating a 1029 Washtub—ejector for emptying 1020 Window—wire rack holds open 1035 SHOP NOTES Air Compressor—portable made from junk pile parts 1052 Automobile sidetracking engine gases uses for old auto plate Automobiles—Engines—compression loss detected by 1052 1054 air test 1043 Automobiles—I gnition overhead bracket for wiring 1054 placing brush over bands 1041 Automobiles—Radiators—air pressure test on 1051 Automobiles— Repairing creeper with adjustable headrest sill as guide for door 1052 Batteries—keeping cable in place 1053 Blowpipe—hot flame for the shop 1037 Decoration—Interior—easy ways to beautify home 1044 Draftsmen’s Kinks holding ink bottle on drawing board 1051 substitute for quill 1052 Fence—convenient opening in farm 1040 Fire—automatic extinguisher 1040 Fishing—cane tube for fly rod tips 1055 Garage—gasoline pump extension 1053 Gate—removable protector for farm 1041 Glass—substitute for frosted 1039 Lawn Mower—repairing 1041 Loading and Unloading—conveyor loads lumber on flat cars 1039 Milk Can—release for cover 1053 Paints and Painting miachine for painting siding 1042 painting over Keene’s cement 1050 Photography—bellows substitute for focusing cloth 1038 Plaster—to prevent from cracking 1054 Plastering—stipple trowel for rough surfacing walls . 1050 Sawmill—rails as guide for endless chain 1055 Shop Equipment—trash box under bench 1055 Signs—wheel for delivery trucks 1050 Stacker—for coins and washers 1049 Tapes—effect of temperature on steel 1050 Tools—fiexible shaft for driving.smnall 1040 Trees—protecting from mice and rabbits 1042 Trucks—brakes make hand truck safe 1049 Valves—repair for stripped valve stem thread 1051 Woodworking—how to turn small plugs 1053 Wrench—for bending small pipe 1043

Page 185

1035 1052 1054 1043 054 ME sc Sed Se a a Automobile Books Aut bile Starting, Lighting and ignition, by Manly .700 pp. $3.00 Rr Automobile Handbook $2.00 Ford Motor Car, Truck and Trac- t by Manly Cloth $1.50 Automobile Battery, Care and Re- Dp by Manly Leatherette $2.00 Motorcycle Handbook, by Manly.. $1.50 SHEET METAL WORKERS’ MANUAL BROEMEL Shop Practice Books Practical Heating Systems, Trouble Jobs and Ventilation........... Sheet Metal Workers’ Manual. ... . Oxy-Acetylene Welding and ox ut- ting ‘loth $1.25 ide Rule and Logarithmic Tavlos Hi: andbook for Millwrights. ..Cloth $. Machine Shop Practice...... Cloth Mechanical Drawing and Machine Design ‘loth $2.00 and mailing us the attached coupon. For direct from this page—cross name of each Send in with price quoted books on our money-back plan. Publishers 1008 Michigan Ave. ORDER DIRECT FROM THIS PAGE —ON OUR MONEY-BACK PLAN The books listed above are only a few of the many in our catalogue, which you will receive promptly after filling out uick action order ook wanted and We prepay postage and send the FREDERICK J. DRAKE & C0. CHICAGO Drake Books Are For Sale at All Book Stores Mail Coupon For Free Catalogue Your Guide to Home Study PRACTICAL MECHANICAL Carpentry Books Cloth Binding Modern Carpentry, 2 vols......... $3.00 The Steel Square, 2 vols... . $3.00 Modern Estimator......... $1.50 Timber Framing........... ... $2.00 Builders’ Architectural Drawing $2.00 Concretes : $1.50 Practical Bungalows. . . $1.00 Roof }raming, by Van Gaasbeek.. $1.56 Electrical Books Telephony, Including AutomaticSwitching, by Smith. 450 »p. Leatherette $2.50 Practical Applied Electricity 2.00 Wiring Diagrams and Descriptions. $1.50 Armature and Magnet Winding. $1.50 Electric Motors, D. & A. $1.50 Chicago, Ill. GENTLE ‘MEN: logue iltustrated cata Mechanical Books { 4 My name is .--++- oeer a —-——- e FREDERICK J. —- co. 1008 Michigan Aven al -—Please send me a gescribes 200 Practies and my address .-- ooee eoooocccoree® POPULAR MECHANICS ADVERTISING SECTION DRAKE'S THEY WILL RAISE YOUR PAY— ORDER ON 5-DAY TRIAL The books listed below will perfect you in your chosen trade—pave the way to the big positions. in non-technical language—easy to read and understand. Every book covers its subject completely. An erftire course of instruction condensed into one volume. benefit 5 days— money refunded in full if not entirely satisfactory. BOOKS Written Your choice sent postpaid—you Order direct from this page. N Nee S'} [TheRossCraneBook - of HOME FURNISHING and DECORATION ih ‘6 —— | Painting and Decorating Ross Crane Book of Home Furnishing and Decoration Cloth $3.00 Furniture, Furniture Finishing, Dec- oration and Patching $5.00 House Painting Methods with the Brushand Spray Gun, by Vander- walker alana alee Cloth $2.00 Interior Wall Decoration, by Van- derwalker Leatherette $4.00 The Mixing of Colors and Pose. by Vanderwalker.. . ‘oth Studio Handbook— Letter “ad De- sign A Show at Sho’ Cards....... Cloth Sign Painting, by Atkinson. .Cloth Strong's Book of Designs, Leatherette $2.00 Modern Painters’ Cyclopedia .Cloth $2.00 Automobile Painting Cloth $1.50 New Hardwood Finishing Cloth $1.50 Wood Finishing, Plain and Roce- rative Cloth $2.00 Owen's Paint Guide .Cloth $1.00 Steam eb ir th Swingle'’s Handbook for Steam Engineers and Electricians Leatherette. $4.00 Examination Questions and An- swers for Marine and Stationary Engineers Leatherette $2.00 Steam Boilers Leatherette $2.00 Swingle’s Catechism of Steam, Gas and Electrical Engineering .. Leatherette $1.50 Modern Languages By Prof. P. 8. Allen, U. of Chicago French without a Teacher....Cloth $1.25 Spanish without a Teacher...Cloth $1.25 German without a Teacher... .Cloth = 25 Everyday French Everyday Spanish. free, postage paid, your which lists . yx Home Stud)

Page 186

6 POPULAR MECHANICS ADVERTISING SECTION I Was a Bookkeeper Now General Sales Manager —Would Not Take $10,000 for My Training ‘When I first enrolled for LaSalle training,’’ writes R. B. Cook, a Chicago man, ‘‘I was a book- keeper. Before | was half way thru my training I was promoted to Collection Manager, with an in- crease of 50 per cent in salary. Later I became Credit Manager of another concern. This move was a very decided promotion, “My next advance- ment was to the posi- tion of Office Mana- ger. In each of these positions I was suc- cessful, and this fact paved the way to my present position. Two years ago I was offered the post of Assistant Credit Manager with my present concern, which I accepted. Within two _— I was made General Sales Manager, which position I now hy ld. ‘*This, Mr. Chapline, is my five-year record as a LaSalle member, and this was made possible thru your splendid training and the various services which 1 have used with much profit. Furthermore, it ac- counts for my enrollment in a second LaSalle course. ‘*Two years ago I wrote you that I would not part with the knowledge LaSalle training had brought me, for $10,000. Today I can say that I would not part with it for several times that amount.’’ Nothing extraordinary about Cook’s achieve. ment. During only six months’ time as many ag 1,248 LaSalle members reported definite salary- increases totalling $1,399,507, am average increase per man of 89 per cent. The records of these men are all set forth, in brief, in a book entitled “A Geography of Suc- cess.” It’s a book well worth having, and it’s ours for the asking, he following expe- riences are typical: “Half way thru course —have had 3 promotions.”’ “Income increased from $1,500 to $6,000 a year.”’ “Promoted—salary increased 233 per cent.’” Send for Salary. Doubling Plan What’s to prevent our equalling such records—setting new records loam own? The cov- pon just below this text will bring you full particulars of the LaSalle salary-doubling plan—without the slightest obligation. Whether you adopt the plan or not, the basic information it will place in your hands, without cost, is of very real and definite value. If a successful career is worth a 2c stamp and two mir of your time, check the field of advancement that apr« you, fill in your name and address, and place the coup the mail TODAY. ites s to hin LASALLE EXTENSION UNIVERSITY The World’s Largest Business Training Institution ee ee a CLP AND MAL OOOO OOOO OO Dept. 664-R I shall be giad to have details of your salary-doubling plan, together with complete information regarding the opportuni- ties in the business field checked below. Also a copy of ‘‘Ten Years’ Promotion in One,’’ all without obli i LASALLE EXTENSION UNIVERSITY oO Business Management: Training for Official, Managerial, Sales and Departmental Executive positions. tion as Sales Executive, Salesman, Coach or Trainer, Sales Promotion Manager, Manofacturer’s Agent, Solicitor, and all posi- tions in retail, wholesale, or specialty selling. oO Higher Accountancy: Training for position tutions. Accountant, Cost Accountant, etc. Methods: oO Law: Training for Bar; LL.B. degree. Commercial Law: Reading, Reference and Consultation Service for Business Men. oO Traffic Management — Foreign and Do- mestic:.Training for position as Railroad or Industrial Traffic Manager, Rate Expert, Freight Solicitor, etc. ent, man, etc. Manager, (CD Railway Station Management: Training for position of Station Accountant, Cashier and Agent, Division Agent, etc. oO Modern Salesmanship: Training ihe pee oO Banking and Finance: Training for execu- i ales tive positions in Banks and Financial Insti- oO Industrial Management: Training for posi- tions in Works an Control, Industriai Engineering, etc. as Auditor, Comptroller, Certified Public (J) Modern Foremanship and Production Training for positions in Shop Management, such as that of Superintend- General Foreman, Foreman, Sub-Fore- oO Personnel and Employment Manage- ment: Training in the position of Personnel Industrial Employment Manager, and positions relat- Oc. P. A. Coaching for Advanced Ac ing to Employee Service. CHICAGO ation. oO Modern Business /////) Wh Correspondence /////// and Practice: fj Training for po- sition as Sales or Collection Correspondent, Sales Promo- tion Manager, Mail Sales Manayer, Secre- tary, etc. (D Business English: Training for Business Correspondents and Copy Writers (I Effective Speaking: Training in the art of forceful, effective speech, for Ministers lesmen, Fraternal Leaders, Politicians, Clubmen, etc (J Commerciai Spanish. oO Expert Bookkeeping: Training for position as Head Bookkeeper. ement, Production Relations Manager, countants.

Page 187

POPULAR MECHANICS ADVERTISING SECTION 7 y : Ly\3 > Lieve. ny as Ee (eS Ce EE AUDELS CARPENTERS AND BUILDERS GUIDES—4 VOLS. $6 Inside Information for Carpenters, Builders, Joiners, Building Mechanics—all Wood- workers. 1600 pages; 3700 diagrams; flexible; pocket size. Short-cut instructions, new methods, ideas, solutions, plans, systems—money saving suggestions. An easy progres- sive course for the apprentice. A practical daily helper and Quick Reference for the master worker. A Helpin and to Easier and Better Work and Better Pay. To get this aid for yourself, simply fill in and mail the FREE COUPON below. INSIDE TRADE INFORMATION ON: ing strength of timbers;

*Audels Guides worth How to use steel to excavate; How to

square; How to file and set saws; How to build furniture; How to use mitre box; How to use chalk line; How to use rules; How to make joints; Carpenters’ arithmetic; Mensura- tion problems; Estimat- How to set girders and sills; How to frame houses and roofs; How to estimate costs; How to build houses, barns, garages, bungalows, etc.; How to read and draw plans; Drawing up specifications; How use settings 12, 13 and 17 on the steel square; How to build hoists and scaffolds—skylights; How to build stairs; How to put on interior trim; How to hang doors; Howtolath—lay floors; How to paint. four times their price— carry handy tdo as

AUDELS PLUMBERS AND STEAMFITTERS GUIDES—4 VOLS. $6 A new set—just out! A practical, illustrated, Reference Library and Study-Course for Master Plumbers, Journeymen and Apprentice Steamfitters, Gas Fitters and Helpers, Sheet Metal Workers, Draughtsmen, Master Builders, Engineers and all Building Trade Students. 1670 pages; 3642 diagrams; flexible; pocket size. Guides explain all the principles, advances and short cuts of the Plumbing and Heating trade. Contains instruc- tions on how to figure and estimate jobs. Use FREE COUPON below to examine, with- out obligation, this valuable work. INSIDE TRADE INFORMATION ON: tilation, refrigeration. Water supply, mains, wells, tanks. Gas-fite tings Underwriters. Sheet metal work, prob- lems, methods, Brazing, heating, lead burning. Welding, various welds, methods. Blacksmith- ing, forges, tools. AUDELS MASONS AND BUILDERS GUIDES—4 VOLS. $6 A new, complete, illustrated trade reference library, for Betehtavere, Cement Workers, Plasterers, Tile Setters and Stone Masons, including a practical outline of Steel Con- struction. 1100 pages; 2067 diagrams; flexible; pocket size. A practical Trade Assistant explaining modern methods of masonry construction. Easy to understand and apply. A reliable and authentic reference work and study-course for Master Journeyman and Young S ; PamnrS > . jPametS nemeiel | O wnetie 5 z 2 Soldering, tinning. Joint wiping, bending, beating. Pipe—iron— steel, threading. Math- ematics, tables, phys- ics. Materials— iron, steel, copper, brass, lead, tin, antimony. Sheet metal— galva- nized—plate. Sanita- “ Audels Guides are prao- al, easy to understand, reliable over the field in plain "we language Arminger. tion, syphonage, tanks. Drainage, sewage, puri- fication. Fixtures— bath—kitchen. a fittings, soil pipe, tools. Laying out work. Roughing. Screwed fit- tings, flanges, joints. Pipe bending, examples. Elbows. Heating, ven- lary. lan revent x such 1e COU- iculars ut the e pian n your ‘value, minutes

Mechanic. Use FREE COUPON below and find out for your- [“{odeis Masons Guides are the best books on the subject. Have Iaid brick 12 years and A.Son- ” self, without obligation, whether this set will benefit you. INSIDE TRADE INFORMATION ON: Bricklaying, tools, ma- | eling; How to figure brick terials; Brick designs, pat- | work: Safe loads, piers, terns, bonds; Setting | chimneys; Boiler settings, frames and foundations; | anchors, fire stops; Labor Mortars, scaffolds, esti- | “ables; Concrete, forms; mating; Mortarsand mor- | How to figure concrete tar mixing; Tile setting, | work; Stucco—on old and mosaic, hollow tile; | new buildings; Plastering | proof; How to read blue Straight edge test, trow-|— wood lath — metal; | prints. Learn More and You Will Earn More! am able to judge. Pirasterers agreement; Plastering on various sur- faces;Stone masonry ;Cut- ting, finishing, estimating stone; Derricks, rigging: Stee construction; Fire

y . e 7 /

Dy PRACTICAL ELECTRICITY — 1 VOL. $4 Audels Handy Book of Practical Electricity is a simplified Ready Reference and Study Course in one pocket size, leather bound vol- ume—for Engineers, Professional Flectricians and Students. 1040 pages; 2600 diagrams; flexible red leather bound. A reliable authority and handy helper for every electrical worker. Contains important and valu- able wiring diagrams, calculations,

Know your job and you'll never be without one. The skilled man is always in demand. Knowledge is power Learn your trade thoroughly by easy reading. This cou- pon is your sey ape for advancement and better pay You risk nothing in sending for Audels Guides for free ezamination. Send it NOW!

= q (Sa Me SS me Eo ee ———— Complete in one machine sketches, helps on mainte- ——— handy, red leather a ae ee. Te ee | Fiaag THEO. AUDEL &CO., xr, Seere- \ bound volume out obligation, how this handy book EXAMINATION So. 23 ST Pay Bi Bd ie w elp you in your daily work. ; . Rusiness the books marked (x) below. If I find Busines INSIDE TRADE INFORMATION ON: COUPON Bins satisfactory, T agree to mall $1 in P Electro-Ther ics, X-Ray 7 days, on each set ordered, and to further mail $1 fee atet Shocks, Welding, Brazing, Radic monthly 9n each set until I have paid the purchase price. pliticians a —— _ ——s o-. | Cc 4 CARPENTERS C] 4PLUMBERS rT hone, elegraph, Cranes, Bells, | parecer m, Toate, Coke eve. | GUIDES $6 GUIDES $6 ways, Vehicles, Automobile Elec- r position tric Systems, Ignition, Generation, t 4 MASONS | [] 1 ELECTRICIANS Lighting, Plant Management, Power GUIDES $6 HANDY BOOK $4 a ia Plans, Armature Winding, Repairing, A. C. t icec - Motors and Apparatus, D. C. Motors and Ap- aratus, Alternator Construction, Dynamos, Wir- ng Diagrams, Sign Flashers, Cable Splicing, Power Wiring, Outside Wiring, Switches, Light- oing, Rectifiers, Converters, Transformers, Fuses, Circuit Breakers, Rheostats, Electro Plating, Electro- lysis, Storage Batteries, Magnetism, Electrical En- ergy, Conductors, Insulators, Static, Dynamic, Radio Electricity, Applications, Ready Reference and index Covering the entire field of Modern Electricity.

| SP GOOUPATION 2 ..05000<000000. - | EMPLOTVED BY oc oc cccccccccccccccccoces 6T30

Page 188

POPULAR MECHANICS ADVERTISING SECTION See What I Can Do For You! Send coupon for this amaz- ing FREE BOOK right now. See what it has done for others See what it can do for you! Just think of this! —Walter Mayville, Harold Lester, M. J. Morriston, Her- bert Trask, Allen Pomeroy and dozens of others without previous auto experience— inonly atew monthsafter enrolling—were in business for themselves, making Big money. My Free Book tells youallabout their wonderful, QUICK successes. Send for it. Start to a Money Quick! You don't have to wait to finish to make real money witt ooke™ Job-Way ” training Mar of Vv idente make money right in the very firet few wer $215 ina Single Week! Only 15 weeks after enrc ling, Ernest B Tucker. Cotton — wo e me he was making as u $ gle week! That's the ki -y of ‘Ql ic K RE st t TS you want! Fi nd out what you can do today Raises His Salary Almost 300 %, in 7 Short Months Cooke “Job-Way” boosted the salary of Guest Alevras, Box 172, Parkerton, Wyo a foreigner with little odue ation, from $15 a week to $50 a we onths and ek ir he gives my training full ‘eee. GET THE FACTS! Send for this semashab “ FREE Auto Book. . 3 » Rd

Free > ‘ . 2 i Hi wy Uh wv SBE AN ian Aue or gD pam r i ie path (/ Go to School jup)ito AT HOME the Cooke i" 7 i iit pipet “ill 056 eyear— lt ial aii J oO it The World's Biggest Business Needs You! If you're earning a cent less tha a week, clip coupon now. Get y Book Let me show you how Five sand Million Dollars are spent ¢ for Auto Upkeep alone. Let meshow salaries are raise od —doubled—t such quick time it's positively amazing! Look at this—from $33 a week to $225 INA SINGLEWEEK is what Cooke" Job-W for Bernard Rumpel, 365 Edison P! dale, N.Y. only monthsafter enrolling No other business offers you so 1 derful opportunities. Job way is the t oes is bringing such marvelous qu Getallthe facts. Send for my Free Bo Earn § ' Up to 150 a Week! Don't sell your time for low pay. Rais¢ Pay QUICK. Be a Big Pay man willshow you the way. earn Right at Home! Keep your present job. Get started for Big F QUICK as an Auto Expert, through Coot Way,” quickly, easily, right in your own hor for my free book: it shows you how successful I've beer how successful I am. Being a practical Directing Eng Owner and Head of this Institution, | know what pract money making training you need to become a B PA MAN and to get QUICK RESULTS and that t gi give you. The Only “Job-Way” Train- ing on Earth! B.W. Cooke is in no way with any other person of similar name. Nowhere INCLUDED of Extra Cost soc. tom 5 Bench. Al wipment inc My training includes “ot Extra jcharge. Alo ALL Electrical work charts. Wonderful Ignition, Starting, Offer Now juick. Lighting—All Mechan- you get the original, g7 4 Clip foupon for tu" ical end Welding, Braz- righted Cooke“ JOB-W A etate ing, Vulcanizing — also ing. I train you with t I give you and illustrat manship, Advertising, Buying, How to not books. Find out ! a Keep Simple Books—also Auto Mag- Way” fits you for Big I azine, also °4 Outfits. Nowhere else I what it has done for other 4 know of, can get you ALL this training. it can de for you. Mall coupon to merigh'n " % Common Schooling Al! You Need i * es O finish my training. Many become sarage Owner Managers, St : Experts, in the class with BIG PAY ecut " great Institution. Employment service for otice on this page what pay ge pate al “Book right away! Address me personally B. W. COOKE eens . 7 ENGINEER CHICAGO MOTOR TRAINING CORPORATION 1916 Sunnyside Avenue Dept. A-16 CHICAGO

Als Li done then send Free Aute

= yy”

Page 189

POPULAR MECHANICS ADVERTISING SECTION Fr i, * FORMER PLASTERER NOW MAKING $12,000 A YEAR Worked for Small Salary Resolves to Earn More Money Gets Offer from Contractor Henry J. Beilman had little education “If spare time study can help other Beilman’s friends laughed at him and and little opportunity to get ahead, but men to get out of the rut,’’ he said, ‘‘it said he was wasting his time, but he he refused to give up. Deep within can help me. I’m going to take up & kept right on studying, for he could him was the longing to make something course with the International Correspon- see how the course was helping him in of his life before it was too late—to dence Schools and study at home. It’s his work. Soon one of the leading con- build a building some day instead of the only way I can ever hope to pic tractors heard about “‘this bright young tinkering around it as a plasterer or myself on a par with technically trained man” and made him superintendent at bricklayer. men.” a fine increase in salary. w youho ripled jr mazing! 225 INA W ay "d ace, Gler 7 \O\ Wr Ay \\ \ RY \ \) AWAAA\\\\ \\* ocean ‘ANY sais Secures Big Contract Glad He Studied at Home The Secret of His Success Bellman went ahead so rapidly that he “I give the International Correspondense Henry J. Beilman is a successful man decided to start a business of his own. Schools full credit for my success,’’ Mr. today because he had vision—ambition ' He met with unusual success from the Beilman writes; “‘there is nothing bet- —and perseverance He realized that ome. very start and today his income is ter for the man who has been deprived he had to learn more before he could “more than $12,000 a year.”” Recently of the advantages of a college educa- earn more. Instead of just drifting he handled the contracting work of the tion. Many of my friends also give the along, he picked a definite goal and new $800,000 Chamber of Commerce I. C. 8S. full credit for their ability then worked and strived until he made building in Scranton. to do their work efficiently and well.’’ his dreams come true. t pra oi - yo SOF Te FFL trainin | MAIL THIS COUPON FOR FREE BOOKLET in- INTERNATIONAL CORRESPONDENCE SCHOOLS, Box 5651!-E, Scranton, Penna. ra Without cost or obligation, please send me one of your booklets and tell me how I can qualify for the position or in the subject before which I have marked an X BUSINESS TRAINING COURSES neve Business Management (0 Accountancy (including C.P.A.) CL) Salesmanship OC) Civil Service or tral Industrial Management (] Nicholson Cost Accounting LJ Advertising L) Railway Mail Clerk re else ¢ Personnel Organization _) Bookkeeping | Business Correspondence |} Common School Subjects ih © COT Traffic Management |) Private Secretary [} Show Card Lettering L}) High School Subjects Ay hs L] Business Law C) Spanish Stenography and Typing Illustrating od JOBS (J Banking and Banking Law CL) French L) Good English LJ Cartooning how “J TECHNICAL AND INDUSTRIAL COURSES Pay. I ea 0 Electrical Engineering A Gas Engine Operating Cj Architect Chemistry 0D Pharmacy Ts, see w |} Electric Lighting ‘ivil Engineer () Blueprint Reading Automobile Work nto meright now Mechanical Engineer C) Surveying and Mapping {_) Contractor and Builder } Airplane Engines ae . Mechanical Draftsman () Metallurgy (J Architectural Draftsman L) Navigation ‘ Machine Shop Practice L) Steam Engineering L) Concrete Builder (_) Agriculture and Poultry Railroad Positions LJ Radio CL) Structural Engineer {) Mathematics : Free Auto BE ANATTIE wannsessvneenenenennsneensnenenentnneneenenennnnsseneneneennneneneseeeessessssssssssssORSSOSESOnneeeiuaneseennansnnneneeneaeeaeenseeneeeeenennen ieeteeeeeeessessseesteneesteereneenenseenenesss cTING i cvecccecccoceccccesooccsosooccooocoss poceeneesoossnsscossonoonennonenasoanacs costs -ensonnassonoonense . cevcececee nore Oreresoreccoosoasccccosoncocccsceseesooooococccces ‘NEER Canadian address—International Correspondence Schools Canadian, Limited, Montreal HICAGO

Page 190

POPULAR MECHANICS ADVERTISING SECTION a You Hungry For... Adventure.. opularity. THEN CHOOSE RE you a red- A blooded, dar- ing he-man? Are you eager for a life of constant thrills, constant excitement and fascinating events? Do you crave adventure, popularity, admiration, and the applause of great crowds? Then why not get into the Avia- tion Industry—the greatest adventure Easy to Become an Aviation Expert $50 to $100 a Week Get into this thrilling profession at once whil field is new and uncrowded. Now since time began—the greatest thrill ever offered to man? Think what Aviation offers you. Thrills such as you never had before! The praise and plaudits of the multi- tude. Ordinary salaries from $75 to better than $400 a week! And a chance to get in on the ground floor where re- wards will be unlimited! Aviation is growing so swiftly that one can hardly keep track of all the astonishing new developments. Air- mail routes have just been extended to form a vast aerial network over the entire U.S. Airlines and airplane fac- tories are springing up all over the country. Men like Henry Ford are in- vesting millions in the future of com- mercial Aeronautics in America! The possibilities are so tremendous that they stagger imagination! Everything is set for the greatest boom in history Pick Your Job! Airplane Instructor Airplane Engineer Airplane Repairman Airplane Assembler Airplane Mechanician Airplane Inspector Airplane Builder Airplane Salesman Exhibition Manager Airplane Contractor Airplane Motor Expert Airplane Designer st SO AVIATION / Curae 188 The fortunes that came out of the a unique new plan—you can quickly se basic training for one of these wonderf salaried jobs, at home, in spare time. Experts will teach you the secrets—give you al side facts that are essential to your s And, the study of Aviation is almost nating as the actual work itself. Ever is chock-full of interest—and so absorbi: you actually forget you are studying. | of all are the ultimate rewards you are { yourself to gain! Send for FREE Book Send the coupon for our new, free boo! out—“ Opportunities in the Airplane Ind It is vitally interesting, r like a romance and te things about this astonis! fession you never even drea This book is so fascinating i easily sell for a dollar. We limited number FREE. W / yours today / 7 . > - / American School of Aviation Dept. 135-A, 3601 Michigan Ave., Chicago, lil AMERICAN SCHOOL OF AVIATION, automobile industry and out of motion pictures will be nothing compared to the fortunes that will come out of Aviation! There is just one thing holding it up:—lack of trained men! Even in the beginning thousands will be needed—and generously paid. The opportunities open to them cannot be over- estimated. Those who qualify quickly will find themselves on the road to undreamed of money— success—popularity—and prominence! Dept. 135-A, 3601 Michigan Ave., Chicago, Ill. Without any obligation please send me FREE book tunities in the Airplane Industry.’ Also information ab course in Practical Aeronautics Name.... Address City State

Page 191

ig, I 3 ells hi ro° ar zi , é A Wri r viation nicago, fll POPULAR MECHANICS ADVERTISING SECTION Amazingly Easy Way to get into ELECTRICITY Don’t spend your life waiting for $5 raises in a dull, hopeless job. Now ... and forever ... say goodbye to 25 and 35 dollars a week. Let me teach you how to prepare for positions that lead to $50, $60 and on up to $200 a week in Electricity—-NOT by correspondence, but by an amazing way to teach that makes you a Real Electrician in 90 days! learn Ch of experience— ] ge, or advanced edu- ¥ py bars no one. I f you don't know ture from an air rake—I don't expect you ] kes no difference! lack of money Most of the men have no more y than you have. why I have worked stonishing offers. I PAY Your Railroad Fare When You Enroll our railroad fare go, and assist you time work while ng. Then, in 12 briet the great roaring { Coyne, I train you never dreamed you trained ... on one greatest outlays of | apparatus ever 1 real dyna- nes, power plants, vitchboards, trans- tations . every- m doorbells to farm power and . . in full opera- full-sized . day! No Books—No | Printed Lessons books, no baffling charts . . all work .. } trican t} w we help to make you a teaching e average ordi Getting into electricity is far easier than you imagine! Without Lessons in 9Q ows trician ever knows and fit- ting you to hold big jobs after graduation. Jobs, Pay, Future Don't worry about a job, Coyne training settles the job question for life. Big demand for Coyne trained Our employment bu- reau secures dozens of posi- tions weekly after graduation, Clyde I Hart got a position as elec- trician with the Great West- ern Railroad at « That's not unusual po nt to Coyne men making up to $800 a mont} is only the beginning of your opportunity into radio, battery or auto- motive for yourself and make up to Bb k $15,000 a vear oo men JOBS OPEN Here are a few of hundreds of positions open to Coyne- trained men. Our free em- ployment bureau puts you in touch with openings to choose k from wee $100 a Week Substation Operator $65 a Week Auto Electrician $110 a Week Inventor - - Unlimited Maintenance Engineer $150 a Week Serviee Station Owner $200 a Week Radio Expert - $100 a Week COYNE ELECTRICAL SCHOOL H. C. LEWIS, Pres. Dept. A7-72 1200 W. Harrison St., Chicago, Il. Founded 1899 building real bat- nding realarmatures, operat- tors, dynamos and genera- gz houses, etc., ete That's a vou far nary elec- Armature Expert We can electrical Get the Facts Coyne is your one grea chance to get into electri ity Every obstacle is re- moved This school is 28 years old — Coyne tested—proven be doubt—endorsed by electrica industry You can find out everything absolutely free. Sim ply mail the coupon and let me send you the big, free Coyn book of 150 photographs facts jobs salaries opportunities. Tells you how many earn expenses while training and how we assist our graduates in the field. T not obligate you. 8 Just mail coupor Get this FREE training 1s yond all Two weeks his does t at once ver $100 a many $60 a week You can go business Mr. H. C. Lewis, Pres., COYNE ELECTRICAL SCHOOL 1300 W. Harrison St., Chicago, Il. Dear Mr. Lewi Without obligation send me your big free catalog and all details of your Railroad Fare to Chicago offer, Free Employment service, Radio and Automotive Courses without extra cost, and how I can “earn while learn ingz.”” I understand I will not be bothered by any sales- man Dept. A7-72 Name Address City

Page 192

POPULAR MECHANICS ADVERTISING SECTION

°2500 Twice he had entered the St. Clair Mansion. What was he after? Who? What was in danger? Berteau, the famous detective, had warned St. Clair that the mysterious marauder would come again. And now—a noise in the passage! The creak of an opening door. A shot in the dark! A capture! Is this wounded stranger the mysterious intruder? Who could tell? Yet Berteau identified the man without hesitation and won the $2500 reward. How did he do it? Easy enough for the Finger Print Expert. He is the specialist, the leader, the cream of detectives. Every day’s paper telis their wonderful exploits in solving mysterious crimes and convicting dangerous criminals. Course in

Reward! For the Capture of an Unknown Man Secret Service

UNIVERSITY OF APPLIED SCIENCE Dept. A-135—1920 Sunnyside Ave., Chicago, Illinois Gentlemen : — Without a bligation whatev d your new, fully illustrated. FREE book on Finger Prints ont your offer of a FREE course in Secret Service Intelligence and the Free Prof inger Print Outfit. is More Trained Men Needed The demand for trained men by governments, states, cities, detective agencies, corporations, and private bureaus is becoming greater every day. Here is a real opportunity for YOU. Can you imagine a more fasci nating line of work than this? Often life and death depend upon finger print evidence — and big rewards o to the expert. Many experts can earn regularly rom $38,000 to $10,000 per year. Learn at Home in Spare Time And now you can learn the secrets of this science at home in your spare time. Any man with common school education and average ability can become a Finger Print Detective in a surprisingly short time. FREE For a limited time we are making a special offer_of 2 professional Finger Print Outfit, absolutely Free, and Free Course in Secret Service Intelligence Mastery of these two kindred professions will open a brilliant career for you. Write quickly for fully illustrated free book on Finger Prints which explains this wonderful training in detail. Don’t wait unt!! this offer has expired — mail the coupon now. You may never see this announcement again! You assume no obligation—you have everything to gain and nothing to lose. Write at once—add! University of Applied Science Dept. A-135 1920 Sunnyside Avenue, Chicago, Illinois <a

Page 193

ates, ivate 1 real fasci- leath vards larly r ofa Free, yence pen a r Prints ait until ver Bee pu have address e Illinois a POPULAR MECHANICS ADVERTISING SECTION 13 They Thought I Was Trying be Funny — ntil I Started to Play —~ Then I Gave Them the Surprise of Their Lives a rowd sat spellbound. Harry had just played the T —beautifully. With mock dignity I arose With your kind permission,”’ I announced, “I ¢hal! 1 you with a piano recital.” ne snickere They were sure I couldn't play a note he really play?” one girl asked. “ Yes,”’ Phil laughed, ys the Victrola—beautifully!"’ studied clumsiness, I fell over the piano stool. Then I eded to pick out “Chop Sticks” with one finger! The wd laughed. This was the dramatic moment for my surprise pping the mask of the clown, I struck the first sweet chords Wagner's lovely “The Evening Star”’ from “ Tannhauser.”’ ughter died on their lips. The magic of my music cast ver everyone. As I played on with complete confidence, got the room—the people—everything. I was alone—lost he sheer beauty of the immortal master’s tender melodies The Thrill of My Life hen the last notes had faded away, there was a roar of ize. Then came questions and congratulutions from my ded friends — “How long have vou been play- —“Who was your teacher?’’—“ Where did you learn?" “I know it is hard to believe,”’ I replied, “but I Pick Your le arned at home—and with- out a teacher!’ Instrument Then I told them the Piano ‘Cello whole story ‘is ave always antec Organ Harmony and { ag alw y —- Violin Composition oO play 1¢ plano u Drums & Sight Singing never had a chance to take ‘ Traps Akulete lessons. Then one day I guitar Hawaiian Steel saw an interesting ad. It Mandolin Guitar Harp Clarinet Cornet Flute Piccolo Saxophone told about a new, easy way of learning music—right at home— without a teacher. ‘Trombone I sent for the Free Demon- Voice and Speech Culture stration Lesson and Book- Automatic Finger Control let Piano Accordion 5-String, Plectrum and Tenor) “When they arrived, I was amazed to ses how easy playing the piano really Banio was I decided that I would send for the course and practice secretly. Then I could surprise you all. Just a Few Minutes a Day “The course was as fascinating as a new game. I enjoyed every minute of it. I was playing real tunes from the start, by note. Reading music was as easy as A-B-C! No weary scak no monotonous exercises, no tiresome hours of practicing. Soon I could play jazz, ballads, classical music—all with equal ease You, too, can learn to play your favorite instrument by this easy “at home"’ method that has taught almost half a million people There's nothing marvelous about it It's just a common sense prac- tical method—so simple you don't have to know the slight est thing about music You find your progress amazingly rapid because every step is clear and easy to understand. Just pick out the instrument you want to play The U. 8. School of Music does the rest And its cost averages just a few cents a day! Free Book and Demonstration Lesson Our illustrated free book and free demonstration lesson explair all about this remarkable method They prove how anyone ca learn to play his favorite instrument in almost no time Uf you really want to learn to play. take this opportunity to make your dreams come true Sign the coupon below. Instruments supplied when needed, cash or credit t 8. School of Mus 76 Brunswick Pidg., New York U. S. SCHOOL OF MUSIC. 76 Brunswick Bidg¢., New York City Please send me your free book Music Lessons in Your Ow: Home,” with introduction by Dr. Frank Crane. Demonstrati Lesson and particulars of your Special Offer I am interested ir the following course: Have you above instrument?.... BOD, 0.0.00 0:2t066s00nsews~enee Address City

Page 194

POPULAR MECHANICS ADVERTISING SECTION EARLE E. LIEDERMAN, The Muscle Builder Author of “Science of Wrestling,” ““Muscle Building,” “Secrets of Strength,” ‘‘Here’s Health,” “‘Enduranc

Page 195

POPULAR MECHANICS ADVERTISING SECTION 15 Kill This Man! HERE’S a devil inside of you. He’s trying to kill you. Look out for him! He tells you not to work so hard. What’s the use? the boss only piles more work on you. He tells you not to bother with your body. If you’re weak—you always will be weak. Exercise is just a lot of rot. Do you recognize him? Of course you do. He’s in us all. He’s a murdererofambition. He’s a liar and a fool. Kall him! If you don’t, he will kill you. Saved Thank your lucky stars you have another man inside of you. He’s the human dy- namo. He fills you full of pep and ambition. He keeps you alive—on fire. He urges you on in your daily tasks. He makes you strive for bigger and better things to do. He makes you crave for life and strength. He teaches you that the weak fall by the wayside, but the strong succeed. He shows you that exercise builds live tissue—live tissue is muscle—muscle means strength—strength is power. Power brings success! That’s what you want, and gosh darn your old hide! you’re going to get it. Which Man Will It Be? It’s up to you. Set your own future. You want to be the Human Dynamo? Fine! Well, let’s get busy. That’s where I come in. That’s my job. Here’s what I’ll do for you: In just 30 days I'll increase your arm one full inch with real live, animated muscle. Yes, and I'll add two inches to your chest in the same time. Pretty good, eh? That’s nothing. Now come the works. I'll build up your shoulders. I'l deepen your chest. I'll strengthen your whole body. I'll give you arms and legs like pillars. I’ll literally pack muscle up your stom- ach and down your back. Meanwhile I'll work on those inner muscles surrounding your vital organs. You'll feel the thrill of life shooting up your old backbone and throughout your entire system. You'll feel so full of life you will shout to the world, “I’m a man and I can prove it!” Sounds good, what? But listen! That isn’t all. I’m not just promising these things. J guar- aniee them! It’sasure bet. Oh, boy! Let’s ride. Send ForTty New , 64% Page Book. Ye ve ae IT IS FREE — -—------ a What do you think of that? I don’t ask one cent. And it’s DONT EARLE E. LIEDERMAN the peppiest piece of reading you ever laid your eyes on. I SEND ONE Dept. 2006, 305 Broadway, New York City | Swear you'll never blink an eyelash till you've turned the last 5 r ; cover. And there’s 48 full-page photos of myself and some of PENNY Dear Sir: Please send me, abso- my prize-winning pupils. This is the firest art gallery of strong lutely FREE and without any obli- men ever assembled. And every last one of them is shouting my = gation on my part whatever, So praises. Look them over. If you don’t get a kick out of this of your latest book, “Muscular news you ae better roll over—you're dead. Come a ee. t YOUR Development. ake out the old pen or pencil and sign your name and address to the coupon. If you haven’t a stamp, a postal will do. But ss NAME AND snap into it. Do it now. Tomorrow you may forget. Remember, it’s ADDRESS something for nothing and no strings attached, no obligation. Grab tt! E ON A ARLE E. ERMAN POSTAL E E LIED E WILL DO (Please write or print plainly.) SSucrdbems anatase es eect ante aben

Page 196

POPULAR MECHANICS ADVERTISING SECTION This Dental Laboratory Expert earns $20 a day! What’s the use of training for the old, overcrowded trades? Easiest, pleasantest work you ever saw! Your own boss, money and suc- cess yours from the very be- ginning. You can start with a ‘‘shoe-string."’ We prepare you in a few months to run a business of your own, to do any job. Common schooling, ability to use your fingers ALL YOU NEED! R. R. Fare to Chicago, Cleveland, Detroit, Boston or Philadelphia deducted from cost of course for a limited time! Jobs Upto $125 a Week! In a business where there are many times as many jobs as Experts, salaries are high, hours are easy, opportunities are every- where! Dentists recog- nize the high-standing of our graduates. No books here—learn with tools and instruments. Start quick—get ready in a few months for your big op- portunity! Mail Coupon today! Rubber Plates Learn to make partial upper or lower plates with soldered, cast or wire clasps, with palatal bars; with lingual bars. McCarrie-trainea Students learn to make full rubber plates of every type, in- cluding Vuleanite base-plates, butted gums, carved gums, etc CROWNS Here's only a small part of your practical training in Crown-work: Two-piece, seamless, open-face, Richmond, cast-base porcelain, Carmichael, split- pin, carved (swaged) cusp, cast cusp, etc. BRIDGE WORK Complete training in both fixed and removable bridgework. Interchangeable teeth, gold dummy, Sanitary porcelain dummy jobs—Roach, Gilmore, Bischoff and all forms of cast-clasp work is taught—not with books but in actual Laboratory. METAL BASE DENTURES Cast bases of Aluminum, Watt's metal, etc., are included in your training. Both centrifugal and air pressure casting machines are used. Free Book contains complete list of subjects in course RRTARE Chicaso Cleveland Detroit Boston or Phila. DEDUCTED If you’re going to prepare for big-salaried jobs or a profitable business of your own GET INTO THE FASTEST GROWING PROFESSION- “Laboratory Dentistry.’ Biggest opportunity fo success of the century, because there are man) more jobs than there are experts to fill them because there are a dozen cities crying for Labora- tories for each EXPERT capable of operating one! 64,000 DENTISTS NEED LABORATORY WORK! Only a few hundred Laboratories in all the U. 8.—most of them in the larger cities. Dentists can’t afford to do thei own mechanical jobs. They can buy the services of a Labor atory Expert at about $3.00 an hour and sell their ow time at $6 to $15 an hour. Dentists will encourage you t learn mechanical Dentistry, start a ‘“‘Lab” of your own, give them qu service than sending their work to other cities. Dentists can't wait and ke their patients waiting. Ask your Dentist. WE HELP YOU OPEN A LABORATORY OF YOUR OWN! Many of our graduates open a Laboratory of their own. T encourage more men to go into this wonderful Mechani profession, we will help you find a good location for your Laboratory l you towards success. Write for complete information on how you « nd —_ in a profitable business of your own after you become a Venta boratory Expert. INTERESTING BOOK—FREE! Right this minute there are openings for 150 Dental Laboratory E> locations where they can do a business of $5,000 to $20,000 a year Bi i can't cash in, take advantage of these OPPORTUNITIES until you're Jain Catalog tells you how quickly and easily you can get ready, how hundreds of others have SUCCEEDED! Tells you how you learn in a few months BY DOING ACTUAL LABORA- TORY JOBS in our famous Dental Laboratory Schools. Brings you R. R. Fare offer and other big induce- ments. Write for free Book today! McCarrie School of Mechanical Dentistry 1338 S. Michigan Ave. Dept. 120 Chicago, Il. = oem aes ee ee ee eee ee ee McCarrie School of Mechanical Dentistry 1338 S. Michigan Ave., Dept. 120, Chicago, Il. Without obligation, please send me your FPF. R and free Book with complete information about hov become a Mechanical Dentist. How you will help m« | Laboratory, how you will help me find a job while | ' EARN while | you LEARN! Day students make « or part cost of rse b rt-time night work Nie ht stude c fed "plenty of a see them t! We'll help you! training, etc. 4FY FY 4S> 4S) 57) 4) 47> 4 =

Page 197

$ rs vded Jobs NTO ON- Y for many t hem ibora- g one! al 8 most of 1o their Labor- e Traine indreds of white | ARN! fistry POPULAR MECHANICS ADVERTISING SECTION ised My Pay 100% ThisAmazing Book Showed MeHow This is Perhaps the Most Remarkable Book Ever Printed. It Has Proved the Turning Point in the Careers of Thousands Who Were Ambitious for Bigger Pay! If You Ever Aspired to Earn $10,000 a Year or More—Read it Without Fail! 1agine how a man feels when his earning capacity imps 700% in a few months? Can you imagine il 1 feel if your salary suddenly became seven times 1 ever before? exactly what happened to O. A. Jones of Missouri, g the amazing book pictured above. Between its iscovered something. he had never even dreamed of ertain force that lifted him out of the routine rut m on the road to $10,000 a year! _ Not at all. This surprising book has done the dreds of others. For e xample: C. W. Birming- read it and Dam oq from $15 a week to $7,500 a Shore of California, read it and commenced earn- is $525 a week. C Champion of Illinois read it President of his company at a salary exceeding ir! THE SECRET OF BIG EARNINGS id they do it? What did the book show them? Just one of these men realized that a knowledge of ip and the ability to sell brings bigger rewards than lse in modern business today! But until they saw ts of this book—‘ Modern Salesmanship'’—they ea that they, too, could win quick success through hip. They believed that this golden field of en- s forever barred to them. But they were wrong— nusual book opened the way to the success that they erly despaired of attaining! Brg eeqainy ARE MADE—NOT BORN! y man of ordinary intelligence can become a suc- sman! Just as you learned the alphabet , you can secrets of selling as taught by the National Sales- ling Association out for yourself. Salesmanship is governed by laws. There are certain ways of saying and doing ike men act as you want them to: certain ways exactly what you go after! Once you have hese fundaraental rules, your success is governed your energy and ambition! BIG DEMAND FOR TRAINED SALESMEN City and traveling sales positions are open in every line all yuntry. For years, thousands of leading firms have er? called on the N.S. T. A. to supply them with salesmen. Em- ployment service is free to both employers and members and thousands_have secured positions through this service. FREE TO EVERY MAN If we were asking two or three dollars a copy for ‘‘ Modern Salesmanship,’" you might hesitate But it is now FREE We cannot urge you too strongly to take advantage of this opportunity to see for yourself what salesmanship has done for others and what the National Salesmen's Training Association stands ready and willing to do for you. No matter what your opinion is now Mod ern Salesmanship"’ will give you a new insight into this facinating and hizhly-paid profession Mail the coupon now! Dept. G-12, N. S. T. A. Bldg. Chicago, Ill. SSSSSCEET EERSTE eee EER National Salesmen’'s Training Association Dept. G-12, N. S. T. A. Bidg., Chicago, Iil., U. S. Please mail me FREE your illustrated book, “ Modern Sales- manship*’’ and particulars of membership in your association and its Free Employment Service Address City Age Occupation

Page 198

POPULAR MECHANICS ADVERTISING SECTION Whether You wanta Job y ora Business of Your Own s==, Be anés)Painter! A Paint Shop of Your Ownin Sight! Earn $75 a Week and Un! Little capital needed to start a small shop ,, . when you know how to do a professional Paint and Duco experts are always job of painting and spraying. As profits sure of a well-paid job. That’s on roll in you can buy spraying equipment, employ ¢ ‘ Tork wer eromdel helpers and branch out. Hundreds of the largest branch of auto work never « rowded paint shops in the U. 8. started with half a dozen T wenty million autos, trucks, trae- brushes and a few cans of material. My 13 outfits ors one « areas “a Ee st RT illustrated below include sufficient tools tors, busses and taxis need r¢ painting to make a start in a shop of @Very couple of years. Lear _ — Paint and Duco experts earn big salaries n Finishers earn $75 to $125 a week. Paint- ti I?) ers and sprayers earn $50 to $90 a we . a RK Plenty of jobs—everywhere—all t Cly time in auto painting, and thef Ag work’s easy and pleasant : Mo Here is an uncroy N Nt}, field that assu

AY your SLICCK DTI NA Too) . 7 a : ) surface, paint, varnish, stripe, ete. I supply 2%? sandpaper, chamois, all kinds of brushes, scrapers and other tools—all without extra charge. I start you off by doing actual painting jobs. Iguarantee that you can learn quicsly and easily. Satisfaction or money refunded is my method. My course includes shop-tickets, shop-lectures, work-tickets, ete. And I tell you how to go out and get the business, how to run it, how to keep order and cost records, etc. It would take many years of actual experience and twice the time and three times the cost at a trade school to learn all branches of the work as I give it to you AT HOME in your spare time.

a Car to Learn by My System re hole Thi mor Wor muc¢ ples

e Ls Ne 4 hay - Shop-Tickets FREE ey ap Dept. 301—-421 S. Ashland Ave., Chicago Send sample shop-tickets free and information on how I may learn auto painting and Duco at home in spare Mail coupon for complete information and get er ? shop-tickets FREE. I want you to see how eas Name.... phiedeetenesinbneps noth reieaal and practical I have made the learning of auto | and Duco. Low tuition for this instruction 5 sis ts lactacin ata las small monthly payments. Rush coupon today. Ser cticiecrnereinceos riaecawecehes wousies 5 | G. King Franklin, Supt. A DE cilisica baicete daeoonestass -- g American Auto Painting School ' = oe oe oe es ee ee ee ee ee es es “PPT. 301, 421 South Ashland Avenue, CHICAGO

a

Page 199

e Up! ilways "S one waded. trae- unt ing salaries Paint- a weel all th and thi leasant. prow assures Success POPULAR MECHANICS ADVERTISING SECTION Would You Sign This CONTRAC 19 T? a Signed: _ » Ask Yourself This Vital Question: In ten years will you still be meeting the same mpetition on the same ground, with the only lifference that you yourself are older, more dis- yuraged? If you wouldn’t sign a contract to “stay put” for the next ten years, what are you doing to get id of a better place? If you aren’t doing any- hing, you might as well.sign the contract as not— you'll be there anyway. In the last few years a vast new industry has opened up, offering thousands of new opportunities to all sorts of men. If you will train yourself to hold its good jobs you can find a better future here. This industry still needs men—many of them—in more than twenty different lines of work. The work is more than interesting, it’s fascinating—so much so that thousands dabble with it just for the pleasure it gives them. This industry is RADIO. Here’s a real opportunity for men who are stuck in the rut to train themselves for a new, fascinating line of work which offers a big opportunity both at present and for the future. Radio needs trained experts for its good jobs. You can get the nec- sary training, in a short time at home, to enable you to get into the Radio game and learn how it feels to make REAL MONEY—in a wide-awake, prosperous new profession. Send for Free Book That Gives All Facts A 64-page book, full of facts, photos, and general inlormation on the opportunities in this new field, will be sent to you free on request. Previous ex- perience in Radio is not necessary—when we prepare you for the Radio profession we do the job thoroughly ee eed) i a dd > >>) dn 00 ee >> >> 7 | HEREBY agree and bind myself to stay at my present job for the term of ten years from this date, at the same salary I am now drawing. E. Smith, President, National Institute—for 14 years the leading educator in the Radio field. He has trained thousands of men (more than any other educator in the world) to enter the Radio profession. National Radio Institute, the oldest and largest Radio home-study school in the world, today has students or graduates in almost every Radio busi- ness of consequence J. Radio J. E. SMITH from the beginning. While the necessary training can be obtained in a space of a few months, it is absolutely complete and thorough. It is also clear and easily-learned—men of practically no education often take it up and master it. You owe to yourself and to your future to look into this opportunity, and see exactly what it offers you. The book will be sent free—absolutely no obligation. Would you sign your name in the contract above, and hand the contract to your employer? If you wouldn’t, then look around for something better. Fill in the coupon below and take a look at Radio's offer. J. E. SMITH, President, National Radio Institute, Dept. F-85, Washington, D. C. Dear Mr. Smith: Kindly send me your free 64-page book on Radio opportunities, also full information on your home- study Radio training I understand no salesman will call on me, and that this places me under absolutely no obligation. Pats ccunendh bance 007k ghee héhes es uadenss Address Town ore ets 7

Page 200

20 POPULAR MECHANICS ADVERTISING SECTION MAGIC TRICK FREE A most mysterious effect! Absolutely new. A trick you never knew or saw performed. One of the many original and surprising illusions created by the famous Dr. Harlan Tarbell. Sent to you without one y's cost or obligation. Includes full directions that will enable YOU to perform it with expert skill with fifteen minutes practice. All you to do is mail the coupon below. Astonish Your Friends Nothing like Magic to give you that magnetic pop- ularity that means everything to a man in and business life. We offer you this free trick to show you the marvelous possibilities open to you through Dr. Tarbell’s complete Magic Course. Make BIG Money Magic is like a golden key that opens all doors to success, As a professional, a semi-professional, or as ahelp in your present business life, Magic will add tremendously to your income. Mail the coupon, Get started. See for yourself. That’s all. No cost. No obligation. Trick is complete with full instructions. Yours to keep. Mail the cou- pon right NOW! 7 FREE Tarbell System, lee, TRIC 1926Sunnyside Ave. Chi ® TarbellSystem, Inc., Dept.A- 1351926 Sunnyside Ave.,Chicage & @ Please send me your mysterious Vani Card Trick and g @ full information as to how I can learn and ——— 5 g money. 1 understand this trick is FREE, prepaid, ’ ‘ sent me without obligation. i ; ee ; a CB AAG GBD 2220 n e222 n cnn cewcccccccosenccocenccessce : wn f @j------------------------------------------+---- Age-------------- t ge SESS SSSSESESSESESESSESESESESESESEE RSS SSeS CAMERA GIVEN Without Extra Charge Your Choice—$100 Professiona! MOTION PICTURE Camera or Professional VIEW Camera Be a Motion Picture Cameramaz Portrait, News or Commereis| Photographer. Earn a }h ands: me salary or own a studio and set yo» own prices! No experience needed Spare time work. Big money to be made while you are learning! : Learn Photography A few minutes a day at home fits, for a big paying position and you get : your choice of these standard profes- sional cameras. Instruction also given in our great New Yor! etudios. ~ Cameramen and photographers are always in demand. Yoy can quickly qualify for this easy, fascinating work. Earn $75 to $250 a week Big money in‘all branches. Hun- dreds of positions now open pay $75 to $250 a week and more! The most interesting profession in the world. Send name and address for big; new, illustrated book on Profese sional Photography. Explaing amazing opportunities. Write for your copy tonight! NEW YORK INSTITUTE OF PHOTOGRAPHY Dept. 49, 10 West 33rd St, NEW YORK CITY Write NOW for FREE BOOK TATED gewoun, oR oy wanting Foret Renew FVD RAT) 9 der Patrol Cart WORK Carrier, P. O. Matron, and other Gov’t Positions, local or travel-E ing. For particulars write Mr. Ozment, Dept, 111 St. Louis, Mo. High-Grade Instruction By Correspondence Prepares You for the Bar—Est. 1892 Universit Methods. Standard Text- Books. Approved by Bench and Bar. Graduates prac- ticing in every state. Send today for Free Catalog and Rules for Admission to the Bar. CHICAGO SCHOOL OF LAW, 802 Reaper Block, Chicago, IIL “BECOME A LIGHT | TRICK CARTOO [ Send $1.00 for Laugh Producing of 23 Trick Draw. 4 \\ ings with Instructions. Catalog of Chalk Talk Supplies Free | BALDA ART SERVICE, Dept. 1, Oshkosh, Wis. Natural Corrective Course’’ and a free copy of y speech magazine. 10,000 cases successfully treated Est. 24 years. Largest school for stammerers in world. Millard lost. of Normal Speech, 2317 Millard Bidg., Milwaukee, Wis. Wonderful, new device, guides your hand; correct your writint infewdays. ‘ig improvement in three hours. No failures. Com plete outline FREE. Write C. J. Ozment, D-34,St. Louls.™ What power meth: sons ¢

Page 201

sional ‘ra or tera 1€raman, mmercia andsome et your > needed hey to be yf aphy ie fitsy you get d protes- lew York ad. You } Trick Draw. opp lies Free. cosh, Wis. anced py of pated world. ce, Wis. D ciememeini f our writing res. Com- Louis Mi POPULAR MECHANICS ADVERTISING SECTION 21 The Man Who is As tounding America! What is the mysterious power wielded by this man—a power he also shows others how to use? What is this new method which has started thousands of despairing per- sons on the road to health, happiness and prosperity? vay from the great theatres and auditoriums hicago, New York, San Francisco, Seattle, Denver, Boston, and practically every great city in {merica where Dr. Bush has been lecturing! These t halls could not accommodate half of those who rd of his wonderful powers and had heard how he lisclosed the secret of his powers to others! [hose who were ill had been shown how to be- me well and strong by a method to which other mental science movements were as the first step in a mmoth, far-reaching stairway. » worried and the nervous had been shown how to rise e their mental and nervous troubles in a single evening and w to attack and solve their problems with a keener mind un- pered by despair. Te )USANDS upon thousands have been turned i 4 An Astounding New Power But that wasn’t all. As wonderful as it is to have the secret mental and physical health in one’s grasp—there is a still r force at work in the universe. This force can be har- such a way as to bring us the MATERIAL things we ey, power, influence, no matter what itis. And Dr. rnessed this force; has proved its value in his own ind has proved time and again that he can show others ise this power. re the lectures were over the reports began to come ing how quickly his audiences had been taught to use this erful power. By your method of visualization I secured the funds to my home,” writes one of Dr. Bush's Chicago listeners ry Roberts of Denver writes, ‘My salary was increased 40% in one week by following j your psychological metliod Partial List of Contents and my powers of salesman- Psycho-Analysis and the Sub- ship were DOUBLED.” conscious “TEN Thousand Dollars How to Have Amazing Memory would not pay for the bene- How to Destroy Fear—Man’s fits I have received.”” James Worst Enemy—The Unseen C. Smith of Somerville, Mass World writes him. Another says, “I What is Love and How to Keep was making no money, my It health was bad and [I was How to Be Popular How to Overcome Failure and Adverse Environment How to Be Beautiful Through Mysterious Force Vibration—How to Win Success How to Develop Personality heavily in debt. Now I have a store of my own and am do- ing a good business. My fam- ily and myself enjoy the best of health.’’ A man who learned of this power in Pitts- burgh—he had never earned How to Conquer Illness more than $25 per week— Poverty a Disease — How to stepped out the first month Overcome It and made over $1000. Dr. How to Double Your Efficiency Bush has thousands of letters Visualization—How to Make like these. They are his Your Dreams Come True proudest possessions. The Mastery of Fate a 4 His Teachings Now How to Use Suggestion for Health, Success and Happi- in B k Form Dr. Bush's sole idea in giv- ing these lectures is the same idea that actuated him in his earlier days before he had dis- covered this amazing new force. Then as an earnest and brilliant young minister of the Gospel he had refused honors and financial returns in order to apply his efforts where they would do good to the greatest number. His lecturesgiven are ness The Greatest Law in the Uni- verse, Just Lately Discovered, and How to Use It What the World Owes You and How to Get It Alter This Life What?—What is God? Smile, Smile, Smile Psychology of Health—Building the Body Beautiful | | Long Life and Full of Pep David V. Bush America’s Foremcst Author-Lecturer on Practical Psychology for the same reason—to teach this new force to everyone who will learn. And to reach still more people he has incorpo rated his lectures in an absorbingly interesting book, ‘Applied Psychology and Scientific Living,’’ which will be sent, on FREE TRIAL, to any earnest seeker after knowledge. Luther Burbank said, “Applied Psychology appears to me the most practical and useful work which has been published on these and similar subjects.” When You Need This Book Are you nervous or depressed? Do you feel old? Have you lost your grip? Have you a worrying disposition? Have you a personality that fails to attract others? Are you timid? Are you misunderstood? Do others seem inclined to give you al- ways the worst of everything? Do you lack the aggressiveness necessary to bring you position and power? Are you in ill health? Have you any chronic disease? Is anyone in your family or among your friends so affected? Are your children wilful and disobedient? Examine It Free! But no description can begin to give you even an idea of the startling truths explained and proved in this wonderful book of over 500 pages. The very first page will be a revelation to you just as Dr. Bush's lectures have been a revelation to keen thinking, analytical minds in every city. One enthusiast says “It can be understood by everyone. And if everyone would read it and then use this new force, humanity would advance 5,000 years overnight.” But you will be the sole judge of this wonderful value Mail the coupon. This remarkable book will be sent at once. Read it for 5 days. Practice this new force yourself. At the end of that time if you find it the most inspiring, the most valuable means to obtain health, wealth and happiness send us only $3.50 which, as you will realize, pays only for the cost of printing, ad- vertising and distributing the 500-page book. Otherwise return the book itself within 5 days and you will not owe a penny. But begin to enjoy the benefit of this new force at once Mail the coupon today. DAVID V. BUSH, Pub- lisher, Dept. 1056, 225 N. Michigan Ave., Chicago, Ill. APPLIED Ds¥ CHOILOGY SCHENTIFIC LIVING | DAVID V. BUSH, Publisher, Dept. 1056 | 225 N. Michigan Ave., Chicago, Ill. Please send me a copy of “Applied Psychology and Scien- | tific Living’’ for approval. I agree to remit $3.50 or remail the book in five days. | | — ; oe6ece ee | Address | | City State (Remittance from Foreign countries and U. S. possessions must accompany all orders)

Page 202

POPULAR MECHANICS ADVERTISING SECTION Hundreds More ; Needed Now oy Ay THE OPPORTUNITY OF A LIFETIME For Men Who Naturally LIKE TO USE TOOLS Automobile Experts Without a cent of cost to you or any ied gation whatever, we wil send you complet details of how to enter this profitable trade os In Demand and earn steady up to Study with the same school that helped $125 A WEEK to train many leading men in the making Crowns, Plates, Bridges, etc., for Dent automobile industry many experts earn far more. Don’t let lack of mor stop you—we have a regular arrangement for HE best proof of the value of the home-study time positions to help you pay expenses courses of the International Correspondence Fare to our nearest school included. Schools is the success of I. C. S. students. This suc- Write Today for Free Bulletin 2 cess is especially apparent in the automobile industry. Jesse G. Vincent, Vice-president of the Packar Motor Car Co., is a former I. C. S. student. So is | BODEE DENTAL INSTITUTE Walter P. Chrysler, President of the Chrysler Corpora- Established over 35 years tion. E. V. (‘Eddie’) Rickenbacker, Vice-president The Pioneer in this Field and Director of Sales of the Rickenbacker Motor Car New York Philadelphia Co.; Hiram Walker, Chief Engineer of the Chandler 1755 Broadway 1305 N. Broad St. Motor Car Co., and John Moore, designer of the IN| Brooklyn famous Ansted Motor, are also former I. C. S. students. 85 Court St. The first step they took was to mark and mail an I. C. S. coupon similar to the one printed below. Make your start the same way and make it right now. We'll gay send you complete information about the I. C. S. Automobile Courses or any other course in which nat are interested. INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5658-E, Scranton, Penna. Oldest and largest correspondence schools in the world Without cost or obligation on my part, please tell me how I can qualify for the position or in the subject before which I have marked an X: DC Complete Automobile Course Gas Engine Operating () Automobile Electric Equip- Complete Gas Engine ment Course (Electrical Engineering |Architect esi ~ Electric Lighting Architects’ Blueprints Mechanical Engineer Contractor and Builder )Mechanical Draftsman JArchitectural Draftsman Use This Machine Shop Practice Concrete Builder r Pcie tn Positions Structural Engineer Be a muscular Marvel. Have the muscles of a super- mah, Become strong for your health’s sake or to astound Surveying and Mapping L) Airplane Engines your friends with extraordinary feats ()Metallurgy 0 Mining t) Agriculture and Poultry which only men of giant strength can do OSteam Engineering ([ Radio ()Mathematics Sree tnatrastions. BUSINESS TRAINING COURSES : : The Giant Chest Expander and Progressive Exerciser A ie made with new, live springy rubber a Business Management Aiatrerising. . ¥7 long wear and great resisting a ities Civil Engineer [iChemistry () Pharmacy ndustrial Management Advertising uaran to give entire satisfaction or money t Personnel Organization Better Letters Made two ways, either Traffic Management C)Show Card Lettering 5 Cables or double strength 10 — _| Business Law ()Stenography and Typing for }Banking and Banking Law CBusiness English } The double ) Accountancy (including C.P.A.)()Civil Service | $ strength exerciser $y L)Nicholson Cost Accounting L)Railway Mail Clerk has Tesis:ance of Bookkeeping Eten School Subjects over 200 Ibs. Private Secretary High Schoo] Subjects 7 Send at once and get ye DoSpanish (5 French Illustrating Send No Money F7" iner at the pre nm rm wetory r k part oe n esta ! ec firm. Don ere ‘ wder fre axan~anetane anand Name Fs . for your money Use coupon now. Ss aan SSIVE EXERCISER CoO., ress 4006 Langdon Bidg. prey po and —uene ferent, New York your 10 cable ( Progressive Please send )your 5 cable ( Exerciser (Check the Exerciser you want.) t if I am not satisfied with thie Exerciser within 5 days and get my money back City Occupation If you reside in Canada, send this coupon to the Intesne- tional Correspondence Bchools Canadian, Limited, Montreaj Name Address

Page 203

yjles POPULAR MECHANICS ADVERTISING SECTION These Real Blue Prints Sent FREE | eo College far Pra cticas Man and two Books Just mail the coupon below! Send no money! Every builder can get these real blue print plans and our book ‘“‘ How to Read Blue Prints” interesting information—all free. building; it tells why “ without sending us a penny. Just send the coupon. Lots of valuable and Yes, and we'll send along another book on the big money goes to the man who knows.” rractical Chicago Tech. easy method of home-training for men in the building trades. It explains Learn how to get the jobs that pay most money or how to get into your own business as a building contractor. Plan Reading—Estimating— Superintending, etc. Train at Home to rn how to read plans, lay out work and run Ds a spare time is enough. Wherever you ma *—whatever your job—we can help you ‘ to fill a higher place and have a bigger in- Age does not matter. Previous school To Builders Living in or Near Chicago Visit our Day or Evening School for builders nd see with your own eyes the work we do. I 100 builders attend each year. You can get ame training at home. Same lessons— » blue prints—same practical instructors ime successful results. Get the Facts Find out how little time it takes to make more money nore money—in building. Write today. The coupon ree. Chicago Technical CHOOL for BUILDER Dept. G-140, 118 East 26th St., Chicago, Ill. MAKE MORE MONEY “j Sshoctne Necessary training is not needed. This is a practical course for practical men, prepared by practical instructors who have been through every branch of the build- ing game themselves. You owe it to yourself to find out how to make more money. Mail the Coupon—-NOW Chicago Technical CHOOL for BUILDER Dept. G-140, 118 East 26th St., Chicago, Ill. s Please send me without obligation, Free and Postpaid, your s two Books and Blue Prints for Builders. It is understood s that no salesman will call on me. (Please Write or Print Name Plainly) z 3 Address. . City Age Occupation

Page 204

POPULAR MECHANICS ADVERTISING SECTION

Discovered / <The Scientific Secret 0 of Caruso’s Amazing Vocal Power A post mortem of Caruso’s throat showed superb develop- ment of his Hyo-Glossus mus- ey p Lato the sound- ness of ae theories a Soleo goed Eugene Feuchtinger, A. M., Musician-Scientist, who dis- covered this scientific me Jor developing the voice, The arrow points to the all- important Hyo-Glosssus mus- cle, the *‘keynote’’ of the Phy- sical Voice Culture method. The Great Discovery Professor Feuchtinger, A. M —famous in the music centers of Europe—discovered the secret of the Hyo- Glossus muscle. He devoted years of his life to scien- tific research and finally perfected a system of voice training that will develop your Hyo-Glossus muscle by simple, silent exercises right in your own home. Since the Professor brought his discovery to America —over 10,000 happy pupils have received his wonder- ful training. 100% Improvement Guaranteed The Perfect Voice Institute guarantees that Physical Voice Culture will improve your Voice 100%. You are to be your own judge— take this training—if your voice is not improved 100% in your own opinion, your entire tuition will be refunded. Send the coupon Inspiring Book FREE $end the couren send you FREE this valuable work, ““Physical Voice Culture”. You assume no obligation. It may be the first step in your career. Do not delay. Perfect Voice Institute 1922 Sunnyside Ave., Studio A.135 Chicago

peuse : . 19 ide Ave. Perfect Voice Institute studio a-1ss Chicago Please send me a copy of your new book, ‘Physical Voice Culture’, FREE. I understand that it is mine to keep and there is no obligation on my part. I am interested in OSinging CO Speaking OStammering 0 Weak Voice

LEARN BY DOING Every phase of all branches of ELECTRICITY taught by Actual Practice In one of America’s foremo: Institutions for trade training ESTABLISHED 1902 No Books Used Individual Instruction Start Any Day Write for FREE 64-page catalo THE NEW YORK ELECTRICAL SCHOOL 44 West 17th St., New York City

LEARN WATCH REPAIRING Be a watchmaker—you can learn this profitable trade by correspondence in a few weeks in your own home by the DeSelms Chart System. After you complete the course you will know a watch fromAtoZ. You will know just what the matter hen you graduate you will our Free ” Book. “tt = our system and terms. THE DeSELMS WATCH SCHOOL LOGANSPORT, INDIANA Way to Go.

| C to work or school and recreation is on a Mead bicycle. You can have your choice of 44 Styles, By colors and sizes. tO Ri FREE der: ha Do business direct J | der:::: the ames. . We = ap- val. Save at hk an Pujces from ¥ uality, factory prices. ig money on wheels and equipment, low prices. Send RECS Tans business direct with makers Write today for free nf eens. 2 factory prices DEPT. fia CHICAGO [°° ausueweler x 6H

Lae ges | so you by mail, or at nd in spare time. Enor- GNSoer: By future. Inter- esting work. Oldest, foremost school. je: qs0 TO $200 WEEKLY \ John Vassos, Y., gets $25 for single show card. Qreuferé. B.C. oo “Earned $200 while taking course’. d today for free information, samples and guarantee. DETROIT SCHOOL or LETTERING 14 Stimson Ave. Est. Detroit, Mich. LEARN PIANO TUNING AT HOME Be DURING SPARE TIME AND |e EARN $50 TO $100 A WEEK. |peatg Our Tune-A-PhoneMakes It Easy. With it any one who has 0 hearing can acquire the knack quickly and accurately Esmay, Beach, Cal., says: “never dreamed there was so much money | r Tuning. le arned $265 in ten days.”’ He is but one of many. ‘ pe Free copy of our book “Winning Independence and Guarant« BRYANT SCHOOL, 71 BRYANT BLDG., AUGUSTA, MIC

Page 205

\ NG anches of ITY ctice 902 Used action ay ge caiaio ORK “HOOL ork City [RING no has ordir Esmay, Lol money i nany. uarantet F JSTA, MIC "la POPULAR MECHANICS ADVERTISING SECTION Thought | Was A Weak Sister -But | Took Their Breath Away! LL of a sudden the office was very quiet, as sometimes happens for an instant or two, and a few words reached me. ‘‘Oh, he won’t dare kick,” the manager was saying, “he’s a pretty weak sister.” Mechanically I went on with my will, how to dominate one man or an audience of thousands My self-consciousness began to vanish. One morning I got up my courage and presented the manager and the chief clerks with a complete plan for rearranging our department stating it simply and clearly, but in a pleasing, interesting and forceful way. I actually took their breath away—they were so amazed that they gave me full power to carry out my ideas! work, wondering vaguely who the ak sister could be 4 new man ad just been hired for our depart- vent and desks were being moved make room for him A minute later I looked up and saw the chief clerk standing at my side “Bob,” he crisply ordered, ‘““‘move your desk back in that corner. I want this space for the new assistant I’ve hired.” Then he turned and strode away. I gulped and wilted down into my chair. J was the weak sister! And I was actually being demoted! The new man was being hired for my e! This was my reward for all hard work—this was how I won t by waiting patiently for my turn be promoted. I had even con- ratulated myself on my close-lipped, ambition What 15 Minutes a Day Will Show You How to talk before your club or lodge How to propose and respond to toasts How to address board meetings How to make a political speech How to tell entertaining stories How to make after-dinner speeches How to converse interestingly How to write letters How to sell more goods How to train your memory How to enlarge your vocabulary How to develop self-confidence How to acquire a winning personality How to strengthen your will-power and How to become a clear, accurate thinker How to develop your power of concentra- tion How to be the master of any situation Soon I had won salary increases, promotion, popularity, power. And I accomplished all this by developing the natural power of speech possessed by everyone, but cultivated by so few—by simply spending 15 minutes a day in the privacy of my own home on this most fascinating subject Send for This Amazing Book This new method of training is fully described in a very interesting and infor- mative booklet which is now being sent to everyone mailing the coupon below This book is called, How to Work Wonders With Words. In it you are shown how to con- quer stage fright, self-consciousness, timid- ity, bashfulness and fear—those things that keep you silent while men of lesser ability get what they want by the sheer power of convincing speech Not only men who have made millions, but thousands have sent for this book—and are unstinting in eserved manner—I thought I was wing strength of cheracter by sticking to my work and trying to push myself—to show off. And that was the whole troubk I had plenty of steel my makeup, but I had no ability to express myself. timid, self-conscious, and actually afraid of my own cice. I would study out the office problems and find solu- us for our difficulties, but I didn't know how to pre- nt these ideas to the nian up ahead. Several of the vs who had started at the time I did were now de- partment managers—because they had the knack of forceful speech, self-confidence and personality —the very qualities I Jacked. It made me good and mad— and I resolved to show them—to get rid, once an for all of my timidity and shyness—my bashful- ness and lack of poise. In Fifteen Minutes a Day And then suddenly I discovered a new easy method which made me into a good talker—a forceful and powerful speaker—almost overnight I learned how to say just the right words at the right time, how to win and hold the attention of those around me, how to bend others to my ; their praise of it You are told how to bring out and develop your priceless *‘hid- den knack *'—the natural gift within you which will win for you advancement in position and salary, popularity, social standing, power and real success. You can obtain your copy absolutely free by sending the coupon NOW SENT North American Institute 3601 Michigan Ave., Dept. 135-A, CHICAGO, TLL. NORTH AMERICAN INSTITUTE, y 3601 Michigan Ave., Dept. 135-A Chicago, Ill. Please send me FREE and without obligation my copy of your inspiring booklet, How toe Work Wonders With Words and full information re- garding your Course in Effective Speaking Name Address a City State

Page 206

POPULAR MECHANICS ADVERTISING SECTION Make That Dream Come True! Haven’t you often pic- tured yourself playing the Hawaiian Guitar, a happy crowd around you, every- body enjoying and admiring your playing? Now you can reach your goal—and play all the latest hits just asthe Hawaiians do! You can play the HAWAIIAN GUITAR Just like the Hawaiians/ $15 HAWAIIAN GUITAR with Genuine Seal Grain practical and interesting Fabrikoid Cover —only 4 motions to learn No tiresome scales and exercises—you play a real piece yourvery first lesson. when Instruction by enroll Native Hawaiians Get the advantage of expert 7 by Kolomoku, Kalaluki, Ferera and Seville—every one famous as both player and teacher. Even if you never touched a musical instrument in your life, under their direction you make rapid headway—you will be astonished when you see how easy it is! This Sweet Toned Hawatian Guitar in genuine Fabrikoid Case—and complete playing out- fit including picks, steel playing bar, etc.; given you when you enroll Retailers ask $15, or more for a similar outfit without the case. Remember, there are no extra—we furnish everything with the course. Learn In Spare Time Pick up your guitar at any time and play. Your lessons are donnie wag ot refer to them. You are never hurried or % reed. —start now—go ahead as fast as you like — as You Play ‘We Guarantee Small first aime nt starts you. And in writing to teach you. And after grad- the entire lesson course comes to uation we coach and advise you without just a few cents a lesson! Begin now. e. Over 45,000 successful graduates, and other courses—Violin, Tiple, Tenor Guitar, Banjo Ukulele, Tenor Banjo Ukulele—under well-known instructors. Write’ for te FIRST HAWAIIAN CONSERVATORY OF MUSIC, INC. 9th Fl., Woolworth Bidg., Dept. 348, New York, N. Y. Approved as a Correspondence School Under the Laws of the State of New York SEND THIS COUPON FOR LIBERAL OFFER! First Hawaiian Conservatory of Music, In 9th Fl. , Woolworth Bidg., Dept. 348, ‘New York, N. Y. Please mail full Information about your 52-lesson Hawaiian Guitar Co: e not obliged to enroll uniess I want to. er . meade Complete Conservatory Course 52 complete lessons. Pic- tures explain every move, Our method is simple, dy—you can And no waiting for a class Name Address. City, BLISS ELECTRICAL SCHOOL Condensed Course in Theoretical and Practical Electricity A special technical school, with comprehensive course ELECTRICAL men with training are in demand. Since 1893 this scl has been training men of ambition and limited tinse for t electrical industries, Condensed course in Electrical ENGINEERING enables graduates to secure good positions and promoti Mathematics and Mechanical Drawing. Students const motors, install wiring and test electrical machinery. R lar course designed to be completed in one college year Over 5000 men trained Thoroughly equipped fire-proof dormitories, dining - hall, laboratori shops Prepare for your profession in the most interesting city in the world Catalog on request BLISS ELECTRICAL SCHOOL 116 Takoma Ave., Washington, D. C. You can learn by our modern and original of instruction every part of the Watch Repairing Trade at home as good or better than at a You can earn money while learning and s well paying position or start in business alter pleting our course of instruction. Go repairers are always in demand and $50 to $75 per week. For particulars apply 't Wisconsin School of Watch Repairing 1 Mason St. ,.MILWAUKEE, WIS. No og > sad oS. oe. Fascinating work. ‘ete instruction book soli ae S Kihebetec Cc SSibes. How to Miz Paints, Show Cards, Window Board and Wall Signs, Ready made letters, Gilding. Tr icka of the Trade, also gives 100 Alphabets Book bound in flexible imt gold edges,and fous ball i bearing Show Card {} Pens. —— paid$3.00. 0D EARN MONEY AAMEDIATELY= : WE FURNISH EQUIPMENT TO START’ T “STAMMERING | ifs Guse and Gire ** You can be quickly cured if you stammer. Send 10 cents, coir or stamps, for 288 page cloth bound book on Stammering and Stuttering. It tells how I cured myself after Stammering and Stuttering for 20 years. BENJAMIN N. BOG 5 6944 Bogue Building, 1147 N. tll. St. is FOREST RANGERS — Men wanting forest ranger, mail clerk, or other governn | indianapolis positions, write for particulars. MOKANE, 236, DENVER, COLO. Become an Attist | LEARN AT HOME You can learn to draw pictures that sell through a remarkable simple home-study method. Earn ™ sey while learning and secure a well-paying P sene | after completing course. Good artists are always in and and earn from $100 to $250 a week. Write today for free book. No obligation. Washington School of Art Room 306-E 1115-15th St., N. W. Washington, D. ‘

Page 207

POPULAR MECHANICS ADVERTISING SECTION Learn How to BO JIMMY DeFOREST Cotnse DEVELOPS CHAMPIONS BY MAIL DeForest Boys are on the Road to Fame and Fortune! The World’s Most Famous Trainer Will Make You a Finished Boxer! Think of being made a thorough- who were unheard of a year ago, are now fast approaching champion- bred boxer under the System of the ship titles, and several of them are actual contenders. wee Leone tS ae 4 and -_ the beginning, they are top-notchers now! veloper o *hampions—Jimmy Je- N OPPORT ou Forest—the greatest Boxing Genius ar ap my to cash pap cdl nape H NUMBER of all time! You can have that price- the demand for boxing talent far exceeds the yee Big Soning "Weeenetes less knowledge which has made so scouting everywhere for talent—paying tremendous prices for it They many World Champions, and started onan ba nm Paw gece mepereery — 7 y DeForest-trained boys to them hundreds to Fame and Fortune! Read csumin devteanh. Goonies men Sad betes ot Coe what Johnny Nemis, Welterweight T. W. Seeley famous Physica ilturist, box regularly to ke ap themesiv ives fit Champion of Eastern Canada, says be a revelation to about it, at the left. Send for This’ Gripping Book Send today for thi Golden > NO EXPERIENCE NECESSARY _ volume of ite kind ever written, full of valuable tnformarion pupils who became successes overnight t contains a complete « You start right from thevery begin- Course, “week by week, with special picture charts used ia net of ¢ reson ning. Jimmy DeForest teaches you his — 7} will thrill you and open your eyes to way. Step by step you goalong. Every = opportunity —— lies before you blow, every attack, every defense, t] and mail it AT ONC * o~i- bs a tc every trick and every bit of ring and Findness to strategy and generalship that was Gol ‘ Jimmy DeForest Boxing Course o wars J will be im taught Jack Dempsey, Kid McCoy den kingvthe topnetchere ‘aught Jack Dempsey, Kid McCoy, 347 Madison Ave., New York City New Waterford, George Dixon, Luis Firpo, Joe Gans and a host of other champions and of Boxing |, Novices in re: contende YeFores ne mntenders that DeForest By 5 Smmy DeForest Boxing Course, 347 Madices Ave., Box 619, New York City rything that the Master Trainer—Jimmy DeForest knows - Without cost or obligation on my part, please send boxing has been set down in one Complete Course that you e your book, “The Golden Age of Boxing ster just as thousands of others have, without stepping yutside your home, or interfering with your work. 20 WEEKS—AND YOU ARE READY 2 20 weeks will make you a finished DeForest-trained boxer # Street No ly to take your place along with the best of the lads who are 4 ° drawing cards for bouts at big fights. Soon thereafter, by a ying the principles you have been taught, your name will rank i 7g City State e of the clever boxers in your locality. DeForest-trained boys Ts x LAWE==2 MEN WANTED $5030.00" your Motion Picture Projection furnatved. Practicgl ana. 10m Low. EASY Tenis. Te course. $2,000 to $4,000 a Year Quickly learned. Short hours, big pay. Best equipped school to coach tree any graduate te tating to ease bar exams. Write in Michig: an. Projectionists for Movie Housesand Road Shows. today for partiewers ott © now in force and book on law FREE. “ Lor Law | MOVIE OPERATORS SCHOOL AMERICAN CORRESPONDENCE E SCHOOL OF | 61 Sproat Street, DETROIT, MICHIGAN ==AE=LEARN TELEGRAPHY=387==3 TEACH YOURSELF {i,it!'twe ommanapn: “Sins unites Norse oe Continental Sends unlimited Morse or Continental messages, at any speed, just as an expert operator would. Adopted by U. S. Government, and leading Universities, Colleges and Telegraph Schools. Catalog 6 cents. OMNIGRAPH MFG. CO., 13-19 Hudson St... NEW YORK EARN UP TO $250 PER MO. SALARY as a Railway Traffic Inspector I will help place as many men as I can qualify in this dignified, interesting profession where you are practically your own boss, see new sights and places each minute It’s outdoor, healthy work near home or in more distant cities. Promotions are rapid and opportunities numerous No Previous Experience Necessary For eight years I have trained men for Traffic Inspection and upon completion of 3 months’ spare time home study, I helped them get good positions. Any man of normal intelligence can qualify regardless of previous training I will train you on the same basis and upon completion assist you to a position paying at least $120 per month salary plus expenses o —or refund your money. o Let me show you how Traffic Inspection o* Butfaic, N. ¥. will increase your income and give you a Yes, I'd like to know more & permanent profession. Send coupon today. o about Traffic Inspection . va me your free booklet A Prof JAMES T. JARRELL a sion of Protection PRES. Div. 2 on Standard Business Training Inst. 5 8 BUFFALO, N. Y. oe? Address comme

Page 208

POPULAR MECHANICS ADVERTISING SECTION $75 to $150 Weekly—$10 to $25 Daily WAGES Learn the ONE great “Open Shop” trade, get the kind of training that you can sell anywhere for BIG PAY. trained Auto, Tractor and Electrical mechanic. No scabbing because no union to join. No strikes. No Apprenticeship. Steady work in America’s greatest industry. Become a McSWEENY Trained AUTO MECHANIC McSweeny graduates up to $10,000 a year. Learn in only a few weeks. Your money back if you are not perfectly sat- isfied No schooling re quired. No book study. Mz ac’s SHOP WAY Means Bigger Pay You learn with real tools on real equipment. Only McSweeny operates three great schools for training auto and tractor mechanics. Choose either school. SPECIAL! Limited Reduced Price Tuition Offer Includes Your Board and Railroad Fare to Cincinnati, Cleveland or Chicago No Extra Charges of Any Kind The greatest, most liberal offer I have ever made. This offer will be withdrawn without notice. Don’t miss it. Write quick for full particulars and my big 68-page book. Méail this coupon to my nearest school TODAY SURE. Become a S are ez arning 100,000 Men Wanted trained men know how to America’s cars and tractors. re- paired. No other busi- ness offers such oppor- tunities to men and boys. who ke ep AUTO, TRACTOR and ELECTRICAL SHOPS Dept. 14 TF, Cleveland, 0., Chicago, Iil., Cincinnati, O. I Name j Address I I city. ; ‘ State. | — Net met ees ee DRAWING IS A WAY TO FORTUNE Ali Hafed, a farmer, sold his ac and seek hi > who bought t found it contained mond mine whic him fabulously ri Hafed overlooked great opportunit door to go far afic search of wealt! Ww illustrates a great EARN $200 To $500 A MONTH If you like to dray velop your talent fortune lies in your } Present opportunities for both men and women to illustrate zines, newspapers, etc., have never been excelled Publis! buying millions of dollars’ worth of illustrations each Federal Home Study Course has been prepared by artists as Neysa McMein, Norman Rockwell, Charles Bull, Clare Briggs, Sidney Smith, Fontaine Fox ; Each student gets individual personal attention training is necessary Every step is clear and simple FREE illustrated catalog on request Shows work of and testimonial letters. Complete outline of course wit! details. Just write your name and address in the margin and it to us. of Illustrating 6137 Federal School Bidg. ating MINN OTELS, restaurants, clubs, apartments, hospitals, Ir i schools and colleges everywhere need trained men an Over 70,000 high-class positions paying $2,500 to $10,000 a ye annually in the hotels of the United States. Nearly one and quarter billions of dollars’ worth of NEW HOTELS, CLUBS AND It TIT being built this year will need over 200,000 trained n and we Hot at salaries up to $3,500 a year, with living usually included. "At any t over,1,000 hotel positions open Previous Experience Unnecessary You can have one of these fascinating, big-pay positio to give you the valuable knowledge that it has taken some of the most men years to obtain. Age is no obstacle—young ard old alike success Past experience absolutely unnecessary A common achocl you neea We train you in your spare time with the Lewis Simplified St ady 3 ar ing under th ho tels thru The Lewis 8 touch with big qyoerst nities. All of your trai Clifford Lewis - w . for one of these sple our Money-Back Agr ro — — — FREE BOOK be’ IPON — = — — — — - | LEWIS HOTEL TRAINING SCHOOLS, Room AG-365, Washington, D. C- Send me without obligation the Free Book ‘‘Your Big Oppor! | Name | Address City State

Page 209

EE “i ut Mt Hii (uh Ks MAGNETIC BASE... STICKS JUST WHERE YOU WANT ITH READ! What Other Men Are Doing $106.95 in 4 Days express 100 e seven lichte left ved last Monda 22 Sales in 15 Minutes F t * The lights go lik eold 22 in 15 t very one owner te 1] Orders 1500 at a Time Emergency Makes a ster one man who weed vit ght t t Eve ryt n hing wae POPULAR MECHANICS ADVERTISING SECTION (arti The Perfect Automobile Trouble Lamp HH} Mi iA WW ‘Hint SHAFFER MADE $67 IN ONE DAY WN? more fumbling in the dark to change a tire or adjust a balky motor. No more juggling feats with flashlights or dangerous matches! A clever new invention known as the BURNS MAGNETIC LIGHT now makes night repairs easy. Also use- ful as an emergency spot-light, tail lamp, etc. Salesmen report it the fastest selling device ever con- ceived for motorists. One of our men, Shaffer, actually made $67 in one day selling to car owners! Willingham sold 23 in 3 hours Dupon a dozen in 45 minutes. And no wonder— Lightning Demonstration Makes Quick Sales A powerful electro-magnet in the base of this beautiful light causes it to stick like glue to any iron or steel part of your car—right through paint, enamel, grease or oil. Throws its brilliant beam just where you want it, and leaves both hands free Consolidated Specialties Corp. Dept. G-14, 21 W. Elm St. CHICAGO, II. to work with. Plug connection fits any car. More cord than you'll ever need. The magnetic feature permits a quick, convincing demon- stration. Franko says Feb. 3, 1927: “The lights sell themselves before I can complete my demonstration.”’ Think this will mean to you 000 cars on the Spring, and every prospect! $75—$150 a Week Remember, the car owner is just one of your big markets Dealers buy in big quantities, and your profits mount steadily upwards. Unusually large discounts to agents now in effect Mail the coupon and let us tell you how you can test this amazing device without risking a penny See how your friends and fellow-employces will enthuse over it—how easy it will be to take any number of orders right off the bat. The coupon brings full de tails and an illustrated description. Mail it today! what , with 22,300, highways this owner a live Consolidated Specialities Corp., Dept. G-14, 21 W. Elm Street, Chicago, Ilinois. Yes, send me full details of your no-r to test the BURNS MAGNETIC LIGHT special agents’ prices and your wo-Way ing Plan rhis does not obligate m Name SSSSR eee R eee eee ee eee, ~ i ® City Stal . under date of isk offer Lesecesecesseeeeauas !

Page 210

POPULAR MECHANICS ADVERTISING SECTION §PENDINGMonEY How'd you like to have a pocketful of spending money all the time—$5 or $10 or even $15 every week—all your own— and a lot of real fun at the same time! It would be great, wouldn't it? Well, you can have it! Hundreds of boys still in school are getting it! And they're no different from you except that they are ‘‘Cooke’’ Trained—they know how to do little electrical jobs in their spare time, after school hours, for which they get real money. I showed them how. And I'll show you, too, just as easily! i Will Train You at Home With my easily learned, fascinating Electrical Course, I'll train you at home like I've trained hundreds of. other boys who are now successful men with jobs paying $70 to $200 a week! It’s all done after school hours, without interfering woth ‘yo pur achool work o h you 7 ls > if you're working oy 4 than st dy It's sound t fite you t b q And it paye for itself as you learn ar ives y ending money, besides, through the spare-time work I tell you how to get, how to do and what to charge ter. Tools, Apparatus and Radio Course— Given peanrarnars Extra Charge You 14 need tools to do ical work with, so I give them to you—six big outfits of instr ° pparatus, and s ) j of spare-time work with—and it'sall yours t, but I also give you a brand new Course in real electric motor—a dandy

Mail Coupon Now! 1 want lots a spending money! -Pay You want a

WORKING OUTFITS in, and, NO EXTRA CHARGE Use this FREE | lise this FREE BOOK COUPON | | lise this FREE BOOK COUPON | - L. COOkE. Chief Instruction Engineer, L. COOKE School of Electricity, iat. 01-A, 2150 Lawrence Ave., Chicago, Il. Send me your big Electrical Book. Sample Lesson and par- ticulars about your Electrical Course and extra Radio Course. This dves not obligate me in any way. i pl pe FREE NIST Middhe St yourse w easy Ashland, Pa

mail coupon tt

6BIG i

Name Address . . re (This Coupon only for boys 15 years old or , more) : arene a ET OIE ROSE RUN: RT

I CAN make a good Penman of you at your § home during spare time, Bm no matter where you live or how poorly you now write. My sim- plified system has shown thousands of others the way to good penmanship during the past twenty years — it can and will do the same for YOU! Beautifully Illustrated Book ** How to Become a Good Penman” It contains general infor- FREE q mation, with testimonials and beautiful specimens of penmanship showing what others have accomplished by the Tamblyn System. (Your name elegantly written on acardtf you close stamp for postage.) WRITE TODAY. Address F. W. TAMBLYN 418 Ridge Bidg., Kansas City, Mo., U. S.A.

STUDY & ally trained men win high - ~ d big eu cess in business and public life independent Greater ope ortuniti now than ever before ors gg headed by men w ith ke lega train <= $5,000 to $10,000 Annually | Ve guide you ote b etep. You can ee 4 during spare tim Lafalle <e. found aumeuns araniiolen ae tate. We furnish al! text CS ay including fourteer a ow cost, eas rms. Get our valuable 1/8-page Evidence’ books FREE Bend for them NOW ity, Dept 664-1, Chicago Largest Business Fraimng institution

Earn $3000 to $10,000 2 year. Prepare quickly during spare time. Also ears while pee learn. New easy method. Nothing else like it. Send at once for MP - <y-b—es in Modern Photography" and full particulars Special offer open now. AMERICAN SCHOOL OF PROTSSRAPRY Dept. 135-A 3601 Michigan Ave. Chicago, u S.A. A

BY OUR PROFIT-SHARING PLAN OUR GRADUATES SUCC vEED | One of our Iowa students started in a very small way—" ing over $30.000 a year. Another’in Wisconsin, over $! t first year, Day or night classes. Call or write for FREI wa

Chjcago School of Watchmaking, Dep!. 2901, 4844 Lincoln Avenue, CH/CAGU

Many of the h ont easily and — a —4 during your s Bigger opportunities oe a sae our graduates at splen Send for FREE Book. “Giving interesting information and vita! facts you want to know abou vertising. Write today PAGE-DAVIS Sconges. o, ADVERTISING a Dept. 135A S. Michigan Ave., Chicago, U.S Ww —y over r befere. Constant der ust whet

Page 211

POPULAR MECHANICS ADVERTISING SECTION « GET ON, YS y 4. anne PAYROLL Post Office Clerks City Mail Carriers Rural Mail Carriers Railway Postal Clerks Bookkeepers Stenographers Income Tax Auditors Clerks in Government Offices at WASHINGTON, D. C., and ELSEWHERE $114Q00 to $*3300°° a Year are steady positions. Strikes, poor business conditions, lockouts or politics will not affect them U.S. Government yvees get their pay for full twelve months every year. There is no such thing as “HARD TIMES" in the U.S. vernment Service . RAILWAY POSTAL CLERKS Postal Clerks now get $1850 the first year, being paid on the first and fifteenth of each month $77.00 each Their pay is quickly increased, $100 and $150 a year, the maximum being $2700 a year. $112.50 each pay day. y get extra allowance for hotel expenses when away from home. PAID VACATIONS Railway Postal Clerks, like all Government em ployees, are given a yearly vacation of 15 working days (: about 18 ds ays). On runs they usually work three days and have three days off duty, or in the same proportion. During this off duty and vacation, their pay continues just as though they were working. W aon they grow old they are retired with a pension As Railway Postal Clerks are continually traveling, they have an excellent chance to see the country. They —. are furnished with a railroad pass. J CITY MAIL ‘CARRIERS—POST OFFICE CLERKS —/ canaries and automatically increase $100 : a year to $2100 with we a Dept. K-173 increase to $2300. They also have 15 davs vacation J ROCHESTER, Examinations are frequently held. City residence is N. Y. unnecessary. 4 = GENERAL CLERK teks be cm sete ee — (Open to men or women 1S or over 4 charge (1) a full description of Salary $1140 to $1860 a year. Pleasant clerical work in the various departments ~ the position checked below nd offices at Washington, D. C., and elsewhere throughout country = Send particulars telling how to get WHAT WILL you EARN 5 YEARS FROM NOW? eS Be ay wea | °) Ra Ny gt of é2- Compare these conditions with your present or prospective condition, perhaps a pag P. ~ a ps 200K, : sovern- changing positions frequently, kicking around from post to pillar, no chanee in ~ ment Positions and How to Get Them, sight tor P "ERMANE NT employment; frequently out of a position and the with list of positions now obtainable rage salary very low bo YOU AS venee VeOu a AR” Ay IAVE ‘You ANY ASSURANCE THAT A FEW YEARS FROM NOW s Railway Postal Clerk ($1850-$2700) YOU WILL GET $2700 OR MORE A-YEAR, EVERY YEAR ‘ Post Office Clerk ($1700-$2300) ' 4 City Mail Carrier ($1700-$2100) Rural Mail Carrier ($2100-$3300) GET FREE LIST OF POSITIONS / Clerk in Government Offices ($1140-$1860) Fill out the coupon. Tear it off and mail it 4 today—now, at once. DO IT NOW—This Bookkeeper ($1320-$2040) vestment of two cents for a postage stamp 4 ay result in you getting a U. 8S. Government A Name b 4 Address ” se This Coupon Before You Mislay It— Write or Print Plainly

Page 212

POPULAR MECHANICS ADVERTISING SECTION Go to High School at Home You can secure a high school education right at home by studying the splendid new courses re- cently prepared by the International Correspon- dence Schools, These courses are equivalent to the courses given in _resi- dent high schools. They have been specially arranged for men and women who wish to meet college entrance examina- tions, to qualify for a business position, or to make up the education they missed when forced to leave school too soon. The College Preparatory Course, the High School Commer- cial Course and the High School English Course include Eng- lish, algebra, ancient, medieval, modern and U. S. History, his- tory, physiology, literature, geography, Latin, bookkeeping, drawing, geometry, shorthand, physics, chemistry, salesman- ship, advertising, civics, trigonometry, economics, American business law, corporation finance, money and banking, busi- ness and trade economics, etc. A diploma is given at graduation. The lessons are easy to understand and hay will make rapid progress because you will be in a class by yourself and you will study under the guidance of instructors who are snouey interested in helping you to get ahead and achieve the bigger things of life. Just mark and mail the coupon and we will gladly send you interesting free booklets describing the High School Courses of the International Correspondence Schools or any other subject in which you are interested. TERR ATION AL, CORRESPONDENCE SCHOOLS x 5654-E, Scranton, Penna. Without cost or yg og please tell me how I can qualify for the position or in the subject before which I have marked an X C) College Preparatory Course _) High School Commercial Course _) High School English Course {_] High School Vocational Course L] High School Agricultural Course O Business Management _] Salesmanship 4 Industrial Management _] Advertising () Traffic Management }] Better Letters ae susiness Law [] Show Card Lettering Banking and Ranking Law ]Stenography and Typing U Accountancy (including C.P.A.) (} Business English L] Nicholson Cost Accounting } Civil Service LJ Bookkeeping }] Railway Mail Clerk CL] Private Secretary JCommon School Subjects CJ Spanish O French () Illustrating Cj Cartooning TECHNICAL AND INDUSTRIAL COURSES J Electrical Engineering C1) Architect LJ Electrie Lighting _j Arepite cts’ Blueprints () Mechanical Engineer [}Contractor and Builder LJ] Mechanical Draftsman [] Architectural Draftsman (] Machine Shop Practice _})Conerete Builder Railroad Positions [) Structural Engineer Gas Engine Cperating _}JChemistry ([) Pharmacy Civil Engineer Automobile Work Surveying and Mappin Airplane Engines Metallurgy () Navigation Steam Engineering Agriculture and Poultry Radio Mathematics Name Street Address PREPARE FOR AN ARI CA —thru the only school operated as a depart- ment of a large art organization. Com- mercial Artists trained the “‘Meyer Both Way” earn as high as $10,000 per year. We today have hundreds of students who had previously studied art elsewhere. Why? Because your instruction is based upon our everyday experience in meeting the art needs of leading advertisers. Home study instruction. Write for illustrated book telling of the success of our students. MEYER BOTH COMPANY Michigan Ave. at 20th St., Dept. 16, Chicago, Ill. A Pe ee ee ee Don’t Don't Envy The Plumber ONE! ———— $11 “one — DAY and work EVERY day, Plumber's pm Every skilled Ri will tell it Plumbers have the best 0 Ha it. WINTER and SUMMER ‘the the Plamber is = at top wages. No skilled Plumber is 3 out of a job—com his opportunities = any trade, plus the opportunities of of having your own , Pee TOOLS (not books) gander ERS in one of the finest We sue o zou a4 — a mber, ever: ue hsrsaety Weal Weck —Blue Print for Tas LEARN IN 8 to 12 WEEKS itor noviom If you are making less than $60.00 a eek pou opett @ ‘© your- self to investigate. Get FREE cuales os poral ~ | eateres and words how we teach this trade. UNIVERSAL PLUMBING iG SCHOOL 2030 Troost Ave. ‘Learn Auto Mechanic, Auto Electrical, Battery, Machine, Electrical, Radio Mechanic, Tiling Bricklaying, Plastering, Plumbing, Welding Drawing, Estimating, Show Card, Sign Painting, Window Dressing. Write for Catalog 50. BROOKLYN ENGINEERING INSTITUTE (Operated by Bedford Br. ¥.M.C.A 1125 Bedford Ave., Brooklyn, New York City. LEARN WATCHMAKING and oo nirownten. We help you securé a position. Easy to learn. Bend for F a E — sT.touirs WATCHMAKING SCHOOL. ST. LOUIS, MO. FOREST RANGERS | MEN, GET FOREST RANGER JOB; oun -$200 MO. HOME FURNISHED; PERMANENT NT, FISH, FOR DETAILS, W RITE NORTON, 226-8, McMANN BUILDING, DENVER, COLORADO WHY NOT spend Spring, Summer : Fall gathering butterflies sects? I buy hundreds of kinds for collections. Som worth $1 to $7 each. Simple outdoor work wit instructions. pictures, price-list. Send 10 cents (not sta my illustrated Prospectus before sending butterflies MR. SINCLAIR, meects, Dept. 6. Box 1424. n Diego, Calif. Skin Troubles Cleared up—often in 24 hours. To prove you can be rid of Pimples, Blackheads, Acne et go on the face or body, Barbers’ Itch, Eczema, !-"- ed Ny , City or Shiny Skin, simply send me your name —— dress today—no cost—no obligation. CLEAR-TONE tried aaa tested in over 100,000 cases—used like toilet water is simply magical in prompt results. You can repay the fs by tailite your tendo: if not, the loss is mine. Wrrre TopaY E. S. GIVENS, 428 Chemical Bldg., Kansas City, Mo. Th AP.

Page 213

POPULAR MECHANICS ADVERTISING SECTION Garage Tractor Electrician Mechanics Chauffeurs Truck Drivers $140 to $200 Battery $150 to $200

Listen man: Do you want money? Deo you want in-« dependence? Do you want a sure trade that pays SWEEN EY SCH oo L $50 a week up? Do you want to travel and see the world? How would you like a good driving job? with over 65,000 graduates, trains you in a Or a place in a repair shop? Or your own service, > 4 as , ° ees Ge ys da Band ~<ie tive or battery station? shop—tire shop—welding —radio broadcast- Here's a letter that shows what youcando. $10,000 CASH ing—auto painting? Write me today— says it is true and genuine. Why man—I can show you GET THE FACTS—about wages—profits— 500 or a thousand letters just as good YOU may not ae and HOW THE SWEENEY have to go broke to pay for your training But even if SYSTEM is equipped to give you successful you do, what's the odds? See how well it paid Hawkins — —_ — —— $100 to go broke. a week. Learning is easy by the Sweeney , . - . — - “ , mr. System of Practical Training Use tools not De ar E 4 J All T — — isIw nog broke whe nik ft Kan- books. Be an auto mechanic—driver— sas City—had only 25 cents over my ticket to Meridian; oy - ‘ came here—went to work in the Dodge Service Station truck driver—repair man-—tire man—dem- - a. or - . Then in N. East Service Station—then opened up a service onstrator. Own your garage or repair shop. ie A .. a , place of my own Now moved in a larger place— \ block Run a welding and vulcanizing shop. You quare. Keeping six mechanics bus Just built e can learn these trades separately or in a com- square. Pay “O = —* wife as @ met bined course. home over 3: ) wh my own car, and wife has hers sedan. Owe no one, have a good stock on hand and money Sweeney System inthe bank. I can honestly say—it was Sweeney's wonder- ful training that did it Before I went to Sweeney's I sé ” worked in a dry goods store as clerk—drawing one of top Learn by Doing salaries, $22.50 a week. Now the expenses of my three I? you are mechanically inclined, if you like kids in boarding school are more than the $22.50 a week to work with tools, you will learn under the _—‘! Used to make. NEY SYSTEM" by actually doing the work on the most complete I am still with you in the air at night—using an eight tube ind electrical equipment. Over $200,000 invested. $50,000 Radio set, Western Electric amplifier. A.J. Hawkins, Meridian, HB. You'll get dirty and greasy, but you'll learn through the Miss. NEY SYSTEM OF PRACTICAL TRAINING that fits you for the 3 waiting for Sweeney Trained Men COME RIGHT NOW - World’s Greatest Siininoan Never Before Have I Made Such an Amazing Offer. I now make it possible for you to come to this Million Dollar Sweeney School Right Now.

years of teaching with tools, not books, and of training men paid jobs, there has never been a time when it was so easy CATALOG A N D trained man to cash in immediately on his work. Over 20 rs and trucks now running, and annually 4 million new cars SPECIAL OFFER to the market; good roads everywhere; bus lines, city and epair shops, garages, battery and tire stations needed; workers, painters, welders, mechanics, drivers find openings Get my big FREE 74-page catalog y every place with certainty of sure continued employment. f It shows hundreds of actual photo- bile industry has taken the world by storm, and the man a ‘Nr graphs of men at work in my vs his job need never worry about assured success. Coming eS magnificent new school. Tells all ceney School means that in a few short weeks you . shout wares, pronts, onportunt- the ground up in the shortest time, at less expense, \t é step by step how you learn nethods, and under the best surroundings. Interesting letters from gradu- \a A\\\\ ates tolling how they made 5 rood. Shows how men come will You Work for $10 a Day? -_ FS Pawte wae ‘ \ this big school. Makes you ‘ndous demand for welders has sprung up \ \\ want to join the crowd. 77 72 - \ \\WN Tells everything you want e country, both in automotive lines and also ¥ \\; co know, 1 Gil chadie ound 1ioma where they can’t get pipe welders for ‘ MAA youa copy beautifully illus- , 2 pt 7. : -@ Q G N trated. I'll tell you how to money. These jobs pay 3% 10 up and the VEL \ get into business for your- sily and quickly learned. I have taken ae StS emowee praionts e e , o Jf : accepted. lding department and enlarged it into a Py 226 AN +e “¢ ‘ nm , » , ‘ weeney, res en ourse so if you want a GOOD TRADE : . ind a sure fire big pay job, here’s your AYTTIITLIIT TELL LLL \ll practical work and when you've fin- EMORY J. SWEENEY, President bs are hunting the men—particularly in 3831 Sweeney Building, Kansas City, Mo. ming southwest. Send me free, without any obligation, your catalog and Special Offer! LEARN A TRADE;

Page 214

34 POPULAR MECHANICS ADVERTISING SECTION Muscles ALK about putting on muscle! Look | pep that when you start to mix it with the at those two pictures at the right. other boys you'll look like the “ Mystery 8” That’s just one of the boys I've made racing a steam roller. over. Yes, sir, changed him almost over- My amazing secrets of muscle-building have night from a puny weakling into a powerful, built champions and strong men all over the two-fisted HE MAN. world. I don't care where you live—how old ‘ you are—whether you're big or little. Just _ Want me to do the same for you? Just follow my personal directions for a few minutes give me a few minutes a day in your own a day, and you'll fairly SEE your muscles home. In 30-days I'll cover your body from , ll I'll sone roe he with muscle lll "ee - ineaee aie Ak et eepen your chest, broaden your shoulders, a ey he xed aaa i wate the legs of a six-day bike racer. Boy, you ever saw: ake my) 4 ’ you'll be proud to put on a bathing suit! I GUARANTEE you big muscles. é ' = ey" Come on, friend, don’t go plugging along “BETTER ‘ Train with half your spark plugs dead and your BUILT : r engine missing. I'll make you hit on ALL ia missing. — make you hit on BODIES’”’ Built Say, I'll give you so much speed and My Amazing New Big Book — Chock . Ne 1 = ee ee ee ee : =e SaaS Full of Muscle-Building Facts 2 TITUS (Dept. P-115), 7 I want every reader of Popular This is n¢ M . , - Mechanics to have this great book. none 105 E. 13th St., New York, N. Y. § siit’s crammed with actual photo- AFTER 30 DAYS OF TITUS ® fsmou z Please send me FREE your wonderful new Book, craphe On Enact 4 LES TRAINING and Execu “Better Built Bodies.” Also details of your $2,000 J Sine cum wanda re Sie toched it following "le. eC 3 t e ked like « nd univer Muscle-Building Contest § MAN-BUILDING. Also details of — Titus ad ont maven my $2,000 Muscte-Building Contest. ; ing complete i Let me send YOU a copy FREE atm ume N : The most valuable book you ever «Ganon ame | read. No obligation. Just shoot me one 3. Crocker. your name and address on the a iat omes ence ina li 2 en § coupen = Seems 7. Western Address. . Th Oo 8. Underwr i be Only 105 3 L $ ens i 2 ae . each NewYork Gi 12 tenih U SE POET Te TTT T Tere T Te ee. 5 13. Universit AND | —What Is Holding You Back?— “rer Tron com yy Pelmanism increases the earning power of the mind as urse by Mail physical training develops muscle. Doubled salaries in Gent eettate ead six months not at all unusual. Strengthens your weak 5 a ; t Americ links; awakens sleeping powers. At Home tesgene ws under ole x Scientific Mind Training—FREE Leitner Master teachers guide and coach you. If you are ~ seerqnins our enrmangt 3. ,000 every year, send ny! Keolastens nt Writenaming =. ye are interested today for free boo Scientific nd Training,’’ showing how me Schoo! a has helped 600,000 people. = Any! nsiru in:Piano,Harmony, Voice ,PublieSchool E PELMAN INSTITUTE OF AMERICA Masts, Viele Cornet, t. Mandolin, G rey lanjo or Reed Organ Ls oth 66, 19 West 44th St., New York UniversityExtension Conservatory, 393 Siege!- Myers Bidy., Chicago TAMMERER OU CAN OIL PAINT Learn to speak correctly, increase earning power! Amazing new method teaches men or women to earn after n ) s o > first leaso OIL PAINT photos — portraits, landscapes or #r Our methods invariably su cessful. Booklet Free subjects, a $18 to $50 and more a week. OIL P pic y ; SAMUEL A. ROBBINS, 419 Boylston St., Boston, Mass. FIT GIVEN, | Send now for free illustrated book ART Be rUpiOS Ine. Dept. MP. 2926 No. Clark St. Chi LEARN CARTOONING Former Students Who Are Now | Successful Comic Strip Artists BLOSSER—Now drawin¢ “Fre and His Friends.’ BYRNES— Now drawing Fellers.’ BRANNER—Now drawing ° Winkle.’ Loc HER-——Now drawing Sapp.’ TAYLOR—Now drawing Pop."’ Successful cartoonists earn big salaries. Many of the most popular Shwith—New drawiaé Cap cartoonists of today learned to draw in their spare time, at home Stubbs.” through the Landon Course of Cartooning and now earn $75 to $200 or more per week. CRANE—Now drawing ‘‘Washing- The Landon Picture Chart Method of teaching ORIGINAL drawing makes cartooning ton Tubbs II.’ easy to learn. Hundreds of sketches like the above explain every step in creating ETHEL HAYS—Now drawing “Flap- ORIGINAL heads, figures, animals, and every detail of cartoon drawing. per “Fanny.” Send 6c in stamps today for sample Picture Chart and full description of this widely PAUL FUNG— Now drawing "Gus & known course, also long list of successful Landon students. Complete information Gussie.” showing possibilities for you will be forwarded. Please staie your age. Address C. N. Landon, Director The Landon School, 738 National Building, Cleveland, Ohio

Page 215

— Trainin Built 29 Encineors This is not a one- man, one-idea school. 2% famous Engineer& and Executives of the following corporations and universities helped me make Dunlap-traine ing complete and up-to-date, 1. Genera! Electric Co. 2. Commonwealth Edison Crocker-Wheeler Co. Cutler-Hammer American Tel. & Tel. Cos Westingh. El. & Mfg. Western Electrie Co. Underwriters Lab., inc. Columbis University . Dartmouth College Sersaeye 13. University of Vermont AND MANY OTHERS Job Service! Co. POPULAR MECHANICS ADVERTISING SECTION ELECTRICAL Job Tickets actually to prove this home-training will prepare you for a good job and a raise in pay! Get these five job-tickets. Look them over. Test your own ability to master Electricity at home in spare time. See for yourself how every fact has been simplified. See what thou- sands of men have paid millions of dollars for, to help them earn BIGGER PAY. Uncover some of the mysteries of Electricity, and seo why millions of men are so fascinated by it. Don’t send a penny, don’t enroll—just mail the coupon, Go Into ELECTRICITY! Thousands of jobs open at $60 to $125 a week. My training prepares you to fill them. Superintendents of Power Plants Wanted. Chief Electricians Wanted. Electrical Experts Wanted in Radio, Electrical factories, Auto Plants, Tele- phone and Telegraph Systems, etc. cD) “Wa Will make this Contract with You! Read it. This million dollar institution stands back of this agreement to PRE- PARE you to fill a well-paid Electrical Job, sulkthen to help you FIND the job— or torefund the small amount charged for your training! 7 Costly Electrical Outfits Given! I send you absolutely | without extra cost, asa part of this training, 7 costly outfits of standard size tools and materials, so you learn Elec- tricity BY DOING actual Elec- trical jobs. One of these out- $10 Motor Given fits is a $10 Electric Motor—a real motor and generator, the same type as the big fellows in a power plant. I send for STUDENTS and GRADUATES. This JOB SERVICE it fo you “knockdown,” and have you wind tho keeps in touch with great Electrical employers all over mer ‘merica, The day you enroll, this Job-Service Department regis- ters you, finds out what kind of = you want, where you want to r And when you pply or the job you want, we back you 2 1 our recommendation an Will RITE Me Immediately! field and armature and assemble it. That's the way I teach every branch of Electricity! House-wiring, Electric Light, Radio, and Motor outfits included. 5 Job Ticksi FREE! AMERICAN SCHOOL elp you make good in it after you_get it. If you have reached the point where you realize YOU MUST train and specialize to get anywhere, write me immediately! I w you the wonderful opportunities, the enormous salaries, the many open- ting in this billion dollar industry. I'll tell you about our sensational combination TRAINING-AND-JOB offer which practically assures your success. ‘a coupon and get 5 Free Electrical Job-Tickets and complete information, CHIEF ENGINEER DUNLAP, Electrical Division AMERICAN SCHOOL carters ™ Ghiexco Will sh Drexel Ave, & 58th St., Dept, EA-74 CHICAGO Send me your combination TRAINING- AND-JOB offer, 5 Free Job-Tickets, facts about opportunities in Electricity, etc. Name Address Occupation

Page 216

POPULAR MECHANICS ADVERTISING SECTION NYeyekystalepets)| Typewriter Offer — east YR ae NEVER has there been such a typewriter bargain on as easy terms! A genuine Silent Ball Bearing L. C. Smith at a 40% savings ! Only the L C. Smith has all these features: Ball bearings (636 of aor at all points of wear the writing visible all the _— Non-shift carriage. 2-color ribbon. All the latest operating conven- fences. Beautiful —re- —=== PLAY PIANO BY EAR Master Jazz or Ragtime in 90 days pee Spmces Mame Niagara eee 35,000 pupils. Big, establ angerenene’ on graduation. Send aes for x ook: — a at Piano”’ and ‘*T; Niagara School of Music,Dépt. B, MiagaraFaiis KY. Guaranteed 5 Years Money cannot buy a better type- writer. U. S. Government bought 50,000. The choice of railroads, big corporations like the Standard Co., etc., because of its exclusive ball bearing "feature. Easiest running, longest wearing of typewriters. Send No Money! Just mail coupon. Without delay or red tape, typewriter will be shipped you. Use it 10 days. See how speedy and easy it runs—the perfect work it turns out. If fot delighted, return at our expense. You'll want to keep it. You can, for $3 down and $5 monthly. Now is the time to buy. $3 worth of extras free. Send coupon now before offer is withdrawn, ITH TYPEWRITER SALES CORP. 116-360 E. Grand Ave., Chicago me the L. C. Smith, F. O. B. Chicago. On arrival I'll de- $3 with express agent. Wi keep machine, I'll send you @ month until the $66.70 balance of $69.70 price is paid; the ti te remain with you until then.] am to have 10 days to ty the type- writer. If 1 decide not to keep it, I will repack and return to to express agent, who will return my $3. You are to give your standard 6-year guarantee From. $1,800 to $10,000 in Four Years Thanks to Higher Accountancy **LaSalle training in Higher Accountancy has enabled me in ad years to increase my business income more than 500%."’ So writes John H. Lansing, Public Accountant, In- come Tax Specialist, and prominent citizen of Amsterdam, New York. ‘‘When you stop to consider that the average bookkeeper does not receive more than $40 a week ,’’ he con- tinues, ‘it is obvious that $10,000 a year has advantages well worth the consideration of any ambitious man or woman. I shall always be grateful to LaSalle for the help it has given = in building a greater income.’’ Mr. Lansing was 43 when he enrolled with LaSalle, and at the time was earn- ing less than $2,000 a year. Send for This Book—It’s Free Are you ambitious to make a real success in business — to fit yourself for oT Paying $3,000, $5,000, $10,000 a year and even better? Then you will find LaSalle’ 8 64-page book, **Accountancy, the Profession that Pays,”’ of the greatest help and _ inspiration—and—LaSalle will send it to you FREE. For the sake of a brighter future, clip and mail the coupon NOW — —Find Yourself Thru LaSalle!- LaSALLE EXTENSION UNIVERSITY The World's Largest Business Training Institution Dept.664-HR Chicago I shoulu ve giau tohave details of ny salary-doubling plan as appli my advancement in the business held checked below. Also acop py of ‘Ten Years’ Promotion in One,’’all with- out obligation. OHigher Accountancy Busi Manag (Modern Business Corre- ()Modern Sal hi e and Practice (Traffic M ement — COModern Foremanship D ea oe and Production Methods iausegement (Personnel and Employ CDLaw—Degree of LL.B. ment Management Employed by (Commercial Law (Industrial Manag DOExpert Bookkeeping Lic. P. A. Coaching (Factory Management (Banking and Finance Present Position Address [Busi English OCommercial Spanish OlEffective Speaking

Page 217

POPULAR MECHANICS ADVERTISING SECTION WHY YOU SHOULD LEARN MODERN BARBERING 4 will enable you to travel and see the World. Barbering A job in every town. ‘ can be used as a stepping stone to higher pro- Barbering fessions. It will make your living—while studying Medicine, Law, etc. ® coupled with Beauty Culture has a wonder- Barbering ful future—protected— professionalized. 4 will soon be harder to get into on account of Barbering Education and Restrictions. . in addition to a good salary—pays in com- Barbering mission and tips more than most men earn. Address Branch nearest you. wr Booklet B-6, The Moler System of Colleges Chicago, Ill, Milwaukee, Wis. Denver, Colo. St. Louis, Mo. Memphis, Tenn. Omaha, Nebr. Cincinnati, Ohio New York, N. Y. Atlanta, Ga. Detroit, Mich, Kansas City, Mo, Dallas, Texas New Orleans, La. Cleveland, Ohio “"Mount Birds teach At Home Mail to mount Birds, Ani- We teorh Jot es Pore end Make huge, Be 0 taxiders by men, women eo Mane yay tplting, all yeahs a to recy tg tear texte om et (Street address not needed.) Free Book= dermy. Send Today. ¥: Northwestern School of Taxi ——_—--. Yow can Thusaae today for our FREE booklet. —— It tells how to learn to play W } Piano ‘on an, Violin, Mandolin, Guitar, Banjo, = Beginners or ed players. Your only expense about 2¢ r day for music we used. American Schoo! of Music.5i lan Bidg., Chicago LAST CALL Your Last Chance You Must Act Now to Save $4.00 Get your Croft LIBRARY OF PRACTICAL ELECTRICITY I fore the price is raised." Increased costs are making it neces- f raise the price of this famous library to $23.50. If you act w instead of waiting, you save $4.00. Act today! Mail the coupon now! The Croft Library of Practical Electricity A combined reference library and home study course, 8 volumes, 3000 pages, 2100 illustrations, flexible binding, $1.50 in ten days and §2. 00 monthly for nine months—only 7 cents a day. ) in who gets anywhere in any line of endeavor is the man who OWs. And generally the more he knows the more he earns. rthe man who wants to know, there is nothing better than these olumes packed to the covers with sound, helpful information on every phase of electricity from first principles to central station work. SEE IT FREE — No obligation to Purchase By just filling out and returning the coupon below you will have, at no cost to you whatsoever, a practical, useful set of books for 10 days’ Free Exami- nation. We take all the risk—pay all chareee You assume mn oblicntion— x ou pay nothing unless you der ide to keep the books. Send the coupon NOW and see the books for yourself FREE EXAMINATION COUPON McGRAW- HILL BOOK CO., Inc., 370 Seventh Ave., New York for 10 days’ free examination the Croft Library ‘of Practical Electricity ry I will send you $1.50 in 10 days and $2.00 monthly until the special $19.50 ie paid. f not wanted, I will return the books at your expense P. M. 6-1-27 10 DAYS’ TRIAL SEND NO MONEY makes an up- to-the-minute Phonograph out of your old one! ea Direct from Factory Now at last you can say goodbye to the squeaky, nasal, rasping metallic tone of your phonograph. Now you can have the beau- tiful, ""-Y al, full-rounded tone of the expensive new machines which are stz artling the world. Yet you need not buy a new chonsesngh if you have an old one. The reproducer is the HEART of any phonograph—and the New PHONIC repro- cucer makes your old phonograph like an entirely new one. tased on the new PHONIC principle. Makes you think the orchestra or artist is in the same room. Gives the New Tone and Volume of Latest New Phonographs Tones never before heard are clearly distinguished when the new PHONIC reproducer is used. Test it on an old record. Hear the difference yourself. Listen to the deep low notes and the delicate high notes Hear how plainly and clearly the voice sounds. Note the natural tone of the violin and the piano, and the absence of “tinny’’ music. You will be amazed. The new PHONIC reproducer is ideal for dancing or for home entertainments. Its volume is almost -double that of the ordinary reproducer. 10 Days’ Trial —Send No Money You cannot realize how wonderful the New PHONIC you hearit. That is why we want to send it to you on 10 days’ trial. Send no money now—just the coupon. Pay the postman only $3.85 plus a few pennies postage when the New PHONIC arrives. Then if you are not delighted, send it back within 10 days and your money will be refunded. If sold in stores the price would be at least $7.50. Our price only $3.85. Over 350,000 people have deait with us by mail. You take no risk. Mail the coupon now for 10 days’ trial. BE SURE TOSTATE THE NAME OF PHONOGRAPH YOU OWN. -— ee ee ee ee ee ee ee ee ee ee ee eee ee ee ee ee ee ee ee ee ee ee ee eee ee ee ee NATIONAL MUSIC LOVERS, Inc., Dept. 586 327 West 36th Street, New York Please send me a New PHONIC is until reproducer for. I will pay the postman $3.85 plus few “(give name of Phonograph) cents postage am not satisfied after trial, I will return your reproducer —- 10 days and you guarantee to refund my money. Outside U. $4.10, cash wtth order.) Name

Page 218

POPULAR MECHANICS

© oa Can You Fix It? Repair any auto fault, learn how NOW. You can do it easily in this new simple way. These FIVE Big Books are up to the minute on automobile engineer- ing subjects; chock full of little known facts about construction, — and repairs. Electric wiring treated in complete detail llustrations and diagrams make everything clear and easily under- ‘stood by anybody. The most interesting and most practical set of books ever written on modern automobile engineering. Whether you want to fit yourself for garage owner, repair expert or merely wish to know more about your car, you will realize the values of these splendidly bound volumes. This is the new 1927 Edition with 70 new and up-to-date wiring diagrams. **NO MONEY’”’ OFFER An amazing new plan of distribution brings these books to you for examination without one cent of payment to us. We don't ask a penny of you, but ship the books to you FREE. Look them over read them as much as you want to; note the splendid photographs and drawings and then if you decide you want them, send us 32.00 and then only $3.00 a month until only $24.80 is paid. That is all; nothing more to pay us. If you send NOW we will include Consulting Membership—FREE Yes, we actually give you a certificate of membership in the AMERI- CAN TECHNICAL SOCIETY which entitles you to free consulta- tion on any subject related to Automobile Engineering. Eighteen specialized experts are at your disposal—ready at any time to help you. With this library and this membership you ought to be able soon to know all there is to be known about autos. Note:—In addition to all this, those who send now will be entitled to the services of our EMPLOYMENT DEPARTMENT without charge. We are in daily contact with firms all over the country who need good men and are willing to pay big. This service costs you nothing. Don't miss this special offer. Send now. mi sansa en ee? ees? sl ll American Technical Society, Automobile Division, AA-19A, Chicago, Illinois You may send me your new complete Automobile Engineering library (1927 edition) 5 big volumes bound in flexo covers for ten days’ Free Examination. If satisfied, I will send you $2.00 then and $3.00 per month until the special low price of only $24.80 is paid, otherwise I will return them and owe you nothing. Include membership certificate and free employment service offer. Name Address Ctly Reference

Big money for your spare or full time. Give a serv- No machines, no equipment; EVENINGS ALONE MEN INTERESTED IN RADI ice to radio owners and autoists. something all need once a month anyhow. PAY YOU SEVERAL DOLLARS EACH —full time much better. No technical knowledge required—we teach everything. Enclose 25c for sample to try and full details. ARVEO COMPANY, Dept. 10, YOU CAN STUDY MUSIC AT HOME With a nationally famous artist as your teacher you can learn to play classical or popular music on your favorite instrument. We guarantee our personal teaching method. Both advanced and elementary courses. CONN Write for catalogue GROSSE ISL. MICH.

NATIONAL SCHOOL OF MUSIC, ING. 506 S. Wabash Ave., Dept.516, Chicago ADVERTISING SECTION Why Good Dancers Are Popular E VERYONE admires 4 and wants to dance with the person who knows the latest steps. There is no need of be- ing a wallflower! By-my re- ¥ markable new easy method anyone can learn the newest dances at home in a few hours. Much less expensive than from a personal teacher. No music or partner needed. So simple even a child can learn quickly. Almost one Axi half million have learned dancing by mail. Your ow, puceess is Gnevantecs. F © prove I can quickly and easily make y dancer, I willsend a F REE my 32 sage book and TEST T Eee To pay the cost of mailing, handling, etc., send 10c. Learn in private —surprise your friends. Act now and be a good dancer socn! 5 ARTHUR MURRAY, Studio 717, 7 East 43rd St., NEW YORK AGEN CAN OPENERS MUST GO/ $450 AN HOUR Just ing New DEVICE.” (_ E> cs A] EW invention now makes old style can op- +‘ eners obsolete. Flips entire top out of any size can, round, square or oval, at turn of crank. Simple. Absolutely safe. Lasts a lifetime. House- \ wives wild about it. Agents cleaning up fortunes. r A?) a (OO Address ~ CENTRAL STATES MFG. CO., < < 4500 Mary Ave., Dep!. 6-700, St. Louis, Mo. \_-~ head '

first 300 men. Territories being snapped up fast. Send quick for details.

FREE OUTFIT Biz Free otter now ready for Cash SOLVE THIS PUZZLE 2|21|9|3|11]7|9|22|5|14 The numbers in the squares above apell twe words. A is 1 .B is 2, Cie 3, ete. Can you make out what they are? Send me your answer right away and I will immediately award you 25,000 votes and tell you how to win, absolutely free, a latest model Buick Sedan worth $1,195.00. We are also giving away ® Chev- rolet Coupe worth $625 and many other valuable prises and hundreds of dollars in cash. In case of ties duplicate prizes will be awarded each one tying. $305 Extra for Promptness In addition to many Grand Prizes a special prize of $305in cash will be given for promptness. Winners may have cash instead f prize won, if preferred. First prize winner can have $1,500 cas) or a Buick Sedan worth $1,195 and $305 in cash. Hurry! Solve the puzzle, clip this ad and send it to me right away with your mame and dress plainly written. Everybody rewarded. Address: ILLIAM L y Dept. A-177, 315 S. Peoria St., Chicago, til

Page 219

shed ON. vate ORK —— POPULAR MECHANICS ADVERTISING SECTION Zz _ = i} | a WN or, | Hi] i Hi MH} MY Nt Pr! i £2 “3 yi o. ah fi 4 e WW Z- | ¥ a Dobe Trained Draftsman [ am averaging ies They Learned 1 Dratting at Home Srom Dobe ~So —~ at / Here are eight successful Dobe-trained draftsmen. The total yearly earnings of these eight men are $50,000. All of them took Dobe’s Simple, Easy, Quickly-learned Drafting Course. All became successful draftsmen because Dobe trained them in the actual execution of real drafting work. Only Dobe uses the practical, simple, easily-mastered Dobe method. Dobe teaches drafting by giving his students the day in and day out work which they are compelled to do when they become draftsmen. And you learn all this at home. You don’t travel a tong way to a distant city. You don’t give up your present job. You learn drafting the Dobe way by using your ore re time only. Yo matter what your job is now you should write for Dobe’s great book, “Successful Draftsmanship”’ and the names and addresses of many other big-earning Dobe trained men. Before the men pictured above began to earn the real money Dobe trained them for, they were making from $12 to $25a week. Think that over. How much are you making today? Maybe you can’t do as well as these men have done—but you've got to admit that itis worth atry. Don’t you think so? “Write for free Book "Successful Draftsmanship” Send a postcard or a letter or mail the coupon for the Free Book, ‘‘Sueccessful Draftsman- ship’’, which Dobe ‘has written for the benefit of all'men who are interested in drafting. It’s Ple @ great book about a great profession—and af ‘ease senc you ought to read it. These eight men are gand = certainly glad they read it and took Dobe’s atraine word that he could make real draftsmen out of them. No matter who you are, where you are, or what your job is you should send for this book N NOW You should send for it unless you are ‘making all the money you want already. DOBE EASY DRAFTING Established 1900 1951 Lawrence Ave., Div. A-135 , Chicago MET et Ld WN) | LUTE HTT Address NN" Post Office sDobe a Drafting, | V4 phon —s y mM ly : : Hi = Ny =) ii my F earn $7000 to 39000 4 HI Dobe Trained Trained } d | Draftsman | a “lem now earning $2004 month end! haven t finished Course yet * Vlnw Dobe Trained Drafismen eer = $1000 @ month” nie nery Draftsman Here Are the Tools You Get Everything you need to learn and work asa drafteman. These are the same tools that Savadge, Dupree, Cermack and all the others got. Dobe has trained more than 10,000 men. There are Dobe trained draftamen in every state and in every | big city. 1 Lawrence Ave., Div. A-135, Chicago me free your book, ‘‘Successful Draftsemanship” of other big money earning draftsmen you have

Page 220

POPULAR MECHANICS ADVERTISING SECTION High School Course in Two Years! You Want to Earn Big Money! And you will not be satisfied urless you earn Geaty pro- motion, But are you prepared for the job ahead of you? Do you measure up to the standard that insures success? Fora more responsible position a fairly good education is necessary. To write a sensible business letter, to prepare estimates, to figure cost and to compute interest, you must have acertain amount of preparation. All this you must be able to do before you will earn promotion, Many business houses hire no men whose general know- ledge is not equal to a high school course. Why? Because big business refuses to burden itself with men who are barred from promotion bythe lack of elementary education. Can You Qualify for a Better Position We have a plan whereby you can. Wecan give you acom- plete but simplified high school course in two years, giving = the essentials that form the foundation of practical usiness. It will prepare you to hold your own where competition is keen and exacting. Do not doubt your abili- Y: but make up your mind to it and you will soon have the requirements that will bring you success and big money. YOU CAN DOIT. Let us show you how to get on the road to success, It will not cost you a single working hour. Write today. It costs you nothing but a stamp. American School Dept. HA-74, Drexel Ave. and 58th St., Chicago American School Dept. HA-74, Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. ....Architect ...-Building Contractor ....Automobile Engineer ...-Automobile Repairman ..-Civil Engineer ....-Shop Superintendent .--Structural Engineer ....-Employment Manager ...Business Manager -++-Steam Engineer ..-Cert. Public Accountant ..,, poremanship ..-Accountant and Auditor ....Sanitary Engineer sen kkeeper é ....Surveyor (& Mapping) .-.Draftsman and Designer ....Telephone Engineer ..-Electrical Engineer .... Lelegraph Engineer ..-Electric Light & Power ....High School Graduate ...General Education .--.Wireless Radio .--Vgcational Guidance ....Undecided ....- Business Law ...-Lawyer ...-Machine Shop Practice ....Mechanical Engineer ‘ou need. . IN 4 MONTHS Fg eteg teu ww e ° mploy- ment Service. *, or Evening - Classes. Athletics. Enter any tim Iso intensive courses in Engineering, Electricity and Building. Write for free 72-page ‘Blue Book’! and facts about how to a y for a high-pay drafting job in 4 months. wi'tgs2e" = Chicago Technical College TF fou can’t come to Chicago, study at home. Your Schoc Solved the Red Book Way Every year thousands of boys and girls choose a better private school through the assistance of The Red Book Magazine Educational Department. After an intensive seven year study which includes yearly visits to over 800 private schools in every part of the country, this department has a wealth of school facts and information at your immediate disposal. Write in detail, giving past schooling, individual characteristics and kind of school wanted. No obli- gation. Address The Director, Educational Dept. The Red Book Magazine *-422 Lexington Ave. Don’t Let Anybody BULLY YOU Learn Scientific Tricks of Physical Mastery By a few simple tricks you can have any assailant mercy quick as a flash. The astounding secrets of self-defer used by the New York Police, are revealed in the mar officially recognized system— Captain Wallander’s Course All Complete In . + * ] Physical Training Manua By Capt. A. W. Wallander Commander Physical Training, New York Police A complete course in physical culture. Scores of gripping action photos showing just how to throw a bigger man al er- power him—disarm a hold-up thug—build up muscle ~ kee fighting trim. Hundreds of health hints, too; care of the f vention of colds, correct posture, walk without fatigue This is renuine book used by the New York Police, now oe ro ¥ ov Let Capt. Wallander give you his great secre Easy to Learn and detective tricks. You'll hardly bei that such valuable knowledge could be learned so easily ALL YOURS IN WORLD’S MOST AMAZING COl RSE In Physical Culture and Police circles this volume is ¥ famous. Send immediately for your copy. DON’T SI = MONEY NOW. Send coupon today. When volume arrives, | the postman $1.97, plus few cents postage. If you are $1 .97 not satisfied return volume and get money back. — ee ee ee ee ee ee ee ee Tsteser PRESS, 34-H W. 20th St., New York. é Send me Capt. Wallander’s Physical Mastery Cours¢ | contained in the “Physical Training Manual. ‘ e U.S.A.) pat yy ys =e

Page 221

POPULAR MECHANICS ADVERTISING SECTION 30 Miles BATHING BEACHES CHICAGO Learn ELECTRICITY Here at GREER COLLEGE Railroad fare allowed—no extra cost Why not enjoy life while you train for life's biggest job? Learn Electricity. Learn it now. Learn it here—at Greer College— in Chicago, the world’s greatest vacation city. Thirty miles of bathing beaches to take the edge off your day's electrical work among our hundreds of motors, rotary converters, generators, tele- phone and radio equipments. Combine pleasure with educational profit. Leave here after twelve weeks equipped to start after the $/ per hour to $25,000 per year that electricity pays trained men. We take mighty good care of you—help you finda name on _ coupon place to live—help find a part-time job if you need brings a big Free One—and in other ways keep Book that answers you from feeling like a stranger all questions. Tells FREE in a big city. Hundreds of fine how to get an _ allowance of railroad fare—how ave 37144 oul OS ' taking Employment men, all ages, already enrolled. ‘° S4V¢ 3740% of regular cost by taking “ pet . our Automobile Course along with Electricity Servi ou'll find them excellent . wt — Y " a wer F , aa Greer Shops have trained over 60,000 men for better Jur employment companions, an@ perhaps = iobs. Come here for good training and fair treat- lepartment is ready ations fria . . ace lifetime friends or business as- jyent, And while you learn, enjoy help you—while : ‘ . : lf le t ) training and for sociates. life at Chicago's many summer play- | 7) G7i2rfo we sar —_ bar ban Low | Act fast if you want to get full grounds. Mail the coupon and learn | resident cours s é O —* , = . € 4 na- Easy terms. information in time to enroll all about our School, courses and | rion about Home for new summer class. Your Greer opportunity Now. uae Cour — GREER. President. Greer College | ept. 601, 2024 S. Wabash Anew CHICAGO. actos | wm. send me your FREE hoOO«K @ni Softer fF automotive | | It is understood I am nob OwTigated in duyway ~~ A 26 H. P. Motor for student practice College of Electrical Engineering Dept. 601 5 pally 2024 S. Wabash Avenue [ Address . CT chp pb Het i ; | = Huse i — | Name CHICAGO, ILLINOIS ——— ices een attendee eectane ennai cumnte snide: eaten eases

Page 222

42 POPULAR MECHANICS ADVERTISING SECTION “I Made $1,000 a Month from the New Food Sensation Greaseless Doughnuts’”’ That’s what Thomas Minch did with Brown Bobby. You, too, can casa in big on this sensa- tional new food product. Think of it! Actually nut! Mrs. Nelson, Rock- ford, Ill, makes Brown Bobbys at home. “Sold 90 doz. last week. Will sell 3 times that many this week. Wonderfully easy.” Fair Store, Chicago, says: “It’s a great money-making device.” “The demand for Brown Bobby is beyond my wildest expectations,” writes Jas. O'Connor, Chicago. So it goes everywhere. Investigate! Big Profits tor YOU! Millions of greasy doughnuts are sold daily, hard as they are to digest. What a mammoth market for Brown Bobby! Cooked without a trace of grease to a golden brown—crisped to a feathery lightness— Brown Bobby is positively the food sensation of the age. No one thought a doughnut could be made without grease. But WE did it. And YOU can get in on the first easy profits. Simple, Easy and Sure Get this! With one simple, inexpensive, electrically operated machine, you can turn out a full dozen Brown Bobbys every 3 minutes—cost, less than 1c each. No baking skill required. Just add water to our patented “ Mix.”’ Nobother. No boiling grease. No odor. A child can do it. Big money for women making Brown Bobbys at home. Tremendous opportunities in every town for a thriving business on a surprisingly small investment. Wherever there are hungry people, Brown Bobby is a sure hit. In lunch rooms, drug stores, wherever food is sold Brown Bobby offers a chance for amazing profits. Special openings for Brown Bobby Specialty Doughnut Shops in every town. Write Quick! Bet he first in your locality to get the first easy profits. Whatever your present line-up, let us present you a plan that wiil be feasible and full of opportunity for a steady, paying business. Just mail the coupon! Get the facts now. Profits are waiting. FOOD DISPLAY MACHINE CORP. 350 W. Huron St., Dept. A-135, CHICAGO, ILL. Som. A-135 Food ptegtey Machine Corp., 350 W. Huron St., Chicago, Gentlemen: Please send me the plan by which I can cash in on Brown Bobby, the Greaseless Doughnut. It is understood that this obli- gates me in no way whatever. ELECIRICTY Practical caretonl TRAININ Great demand for _ technical electricians and engineers. A brilliant future awaits you. A high salaried position or a profitable business of your ow: these may be yours through our PRACTICAI. TECHNICAL courses. Opportunities unlimited Finlay condensed method now in 25th successful year trains head and hand. Thousands of high salaried graduates throughout the world testify to the success of Finlay training. Extensively equipped laboratories and shops. Faculty of recognized ex- perts. One and Two Year courses in SEND Electrical Engineering open in Ser tember: FOR 12 Weeks courses in Practical Electricity FREE and Power Plant Operation open at any time. Degrees, diplomas and certificates CATALOG of efficiency awarded. Students assisted to positions. FINLAY Poi itn? ess 120 Finlay Bidg.- Kansas City, oa Wette rite today for FREE 128-page book .**THE LAW TRAINED MAN,"* which how to learn law in your itor time and earn more money. Qualify for a tahigh salaried executive a or io toenter ee Srastice of law. prods at home through the RO egal authorities including CHIEF JUSTICE WILLIAM HOWARD TAFT. Seemene graduates practicing law everywhere. LL. B. degree con- ferred. Magnificent 25 volume “1 library furnished immediately $02 eeeemnent. Moderate tuition fee. Low monthly terms. Money kG tee. Write for book today. Blackstone Institute, Inc., .3753,o°4.8"4., America’s Foremost Non- Resident yey Schoot $20 seestead rine rons Your choice of a Violin, ‘Tenor banjo, Hawaiian Guitar, Ban)o net, Ukulele, Banjo Ukulele, Guitar, Mandolin or Banjo M You will be proud to own any one of these instruments a give you one without cost. A few cents a day for lessons is your expense. Our system of teaching is so easy that you can pl: Ay seve pieces by note with the first four lessons. We guarantee success or no charg I ment and lessons sent on one wom" 8 tree trial. Write for booklet toda ay, 0 tion. Over 200,000 satisfied CHICAGO CORRESPONDENCE SCHOOL OF MUSIC, INC. 32 North Halsted Street, Dept. 345, Chicago, Miinois. No Joke to/ Be sqoceestul. Master . Win hap ——- wand for tail ~ ke 3 h record. Dime covers postage. J 153 53 Sumeon, The Lewis Institute, Detroit LEARN PHOTO-ENGRAVING! Earn $200 to $500 monthly. Photography and Photo-Engr 4 taught in few months by largest college of its kind. Esta! | 1893. Big demand for graduates. Write for free book. Illinois College of Photography, Box 467, Effingham, Ill. vite MASTERLY Speak ENGLISH Learn correct | Bectich with Sherwin Cody’s new !n- vention. Norules to memorize. Like « fascinating me. Spare- _ aatuay, 15 minutes each day, quick gives you masterly command of English. _ Interesting kiet sent free. Write today. in Cod hoo of English, 56 Searle Building, Be ~~ hy n.Y

Page 223

POPULAR MECHANICS ADVERTISING SECTION HOW £1 Discovered the Secret of Making ‘7500 a Year and More! Here are Some Amazing Inside Facts About Success — As Discovered by a Man Who Has TRIPLED His Former Earnings in 3Short Months! Read This Interesting Message Without Fail! By N. C. Paige—Star Salesman After 3 Months’ Experience 2104 in 3 days! $80 an hour! ~ to $10,000 a year! rhose are figures I was only dreaming bout a few months ago. But today they re chalked up in black and white on my sales record, and, what is more impor- tant, in my bank book! And yet, to be frank, only a small part of the credit is lue me. Anybody with average ability can do exactly the same. Where the Big Money Is Before ‘came to,” I tried nine different ways ! earning money. They all sounded good, solid, substantial and difficult. The harder they looked, the bigger I thought the possibilities must None of my propositions panned out and I hardly made enough to keep going. Then I dis- vered KRISS-KROSS. The day I read about this amazing shav- ing device in Liberty Magazine was cer- tainly a red-letter day for me! Here's what I saw: $7,500 : ike my own case for example. ll Guarantee to Keep You in Razor Blades for Life TI ink of it! 365 keen, cool shaves a year trom the same blade. That’s what KRISS-KROSS is doing for American shavers everywhere! This amazing invention & radical advance in shaving comfort and economy that it deserves to be called a blade rejuvenator. KRISS-KROSS strops your blade (any make) on the aeeel just like a master barber. Pressure decreases marks such automati- cally. Nickel jig flies up to notify you when your blade is ready. “And now for my smashing offer! To introduce KRISS-KROSS stropper I will give you an amazing new kind of razor free. Really 3 razors in one. Can be made straight or T-shape in a jiffy. Comes with 5 special blades.” Naturally, I was vitally interested because cool, slick painless shaves are what every man tries to get and usually can’t! And then at the bottom of the ad, I saw a little square: “Agents: Make big money as a KRISS- KROSS representative—$75 to $225 a week. H. King made $66 in one day. J. C. Kellogg made $200 in 7 days.” First Step to Success! At first I was skeptical about the money- making part of it. But the stropper sounded so extraordinary that I sent for it. When it came, I saw it was even more astonishing than I had imagined 1 took it over to show a friend and in less than 5 minutes he asked me to get him one. While we were talking, two more friends dropped in and made the same request that I get them each a KRISS- KROSS outfit! When I left, I had nearly $5 cash profit in my pocket—money I had not made one single effort to get! I saw my chance and grabbed it! The KRISS-KROSS people gave me exclusive territory, a wonderful lot of sales helps and a big, illustrated salesmanship course book that contained selling secrets worth $100 cold cash to me! My first week I made $180! The next 3 days I made $104; Just think of it! It didn’t seem to take any effort. The orders rolled in like water over a waterfall! Mr. Paige's experience is typical of that of hundreds of KRISS-KROSS repre- sentatives. Practically every man who takes up this astonishing proposition writes us that he is making money faster and easier than he ever dreamed possible. Right now more KRISS-KROSS repre- sentatives and agents are wanted—to earn $30 a day and up. Find out about it today! Clip the coupon and mail it at once! You'll never regret it. Paige didn't! So act at once! Rhodes Manufacturing Co. Makers of KRISS-KROSS 1418 Pendleton Ave. St. Louis, Mo. Dept. G-371 Rhodes Mfg. Co., ‘ | Dept. G-371 | | 1418 Pendleton Ave., | St. Louis, Mo. Please send me full details of your | amazing KRISS-KROSS Stropper with list of generous commissions, | and tell me how I can make big profits with it in my full or spare | time Name | Address | City State | I | a

Page 224

POPULAR MECHANICS ADVERTISING SECTION CHEMISTRY Tue Chemical Industry now ranks fourth among the industries of the United States and it offers a splendid opportunity for ambitious men. Arthur D. Little emphasized this very point in his speech before the American Institute of Chemical Engineers when he said: ‘Industrial developments along new lines are everywhere in progress and they call upon the chemical engineer for new equipment and new methods of production and control.” One of the best ways for you to prepare for a good position in this fascinating field is through the home- study courses in Chemistry offered by the Interna- tional Correspondence Schools. These courses are complete and practical because they were prepared by some of the best-known chemists in this country, including: ALLEN Rocers, B.S., M.S., Ph.D.—Head of Depart- ment of Industrial Chemistry. Pratt Institute. Anprew M. Farris, B.S. — Consulting Chemical Engineer for the Tennessee Copper and Chemical Cor- poration; American Zinc, Lead and Smelting Co.; Ameri- can Zinc Oxide Co., and th. Baugh Chemical Co. L. M. Totman, Ph.D.—Formerly Chief Chemist, Wil- son & Co. Now Vice-president, United Chemical and Organic Products Co. BrapLey Stovcnton, B.S.—Head of the Department of Metallurgy, Lehigh University. Owen L. SHINN, Ph.D.—Professor of Applied Chem- istry, University of Pennsylvania. Qualitative and Suyetiatixe Analyses Outfits are sup- plied with these I Courses at special prices for your laboratory a" ‘at home, and the courses are so arranged that you get just the help you need to secure a good position in the work you like best. Just mark and mail the coupon and we'll gladly send you Free Booklets describing the I. C. S. CHEMISTRY Courses or any other course in which you are interested. Mail the Coupon for Free Booklet INTERNATIONAL CORRESPONDENCE SCHOOLS Box 6652-E,Scranton, Penna. Without cost or obligation, please send me one of your booklets, and tell me how I can qualify for the position or in the subject before which I have marked an X: Analytical Chemistry (pAcstrtica « = industrial Chemical Engineering Chemistr pa Chemistry Fighert Chemistry Course Metallurgical Chemistry Pharmacy Also courses specializing in the Chemistry of the following industries O) Manufacture of Leather (J Manufacture of Tron Manufacture of Cottonseed O11 LJ Manufacture of Steel Manufacture of Petroleum } Manufacture of Sugar Manufacture of Sulphuric C) Manufacture of Soap and Hydrochloric Acids Manufacture of Cement Electrical Engineering Steam Engineering Electric Lighting Architect CJ Radio Mechanical Engineer Architects’ Blueprints Mechanical Draftsman Contractor and Builder Machine Shop Practice Architectural Draftsman Railroad Positions Concrete Builder Civil Engineer Structural Engineer Surveying and Mapping Airplane Engines Metallurgy () Mining CJ Mathematics Street Address a eee eee eee eeeeeeee The Poultry Business PAYS BIG Those who know how, find it easy to make incomes of $3,000 a year and more even on very small acreage. There is big money in poultry if you follow the right plan. Start as small as you like—grow fast. Write for FREE BOOK Free Book, ‘“‘ How to Raise Poul- try for Profit,’ by Harry Lamon, former Government Poultry Ex- pert, tells all about his course. Shows you how to get started and how to succeed. Success positively guaranteed if you follow his meth- . Send for your copy TODAY. National Poultry Institute Dept. 411, Washington, D. C. _ Big fotare. Inter. $: oremost school. 50 To 200 WEEKL gets or single show yan 4 By Note or Ear. With or without music. “hort Course. Adult beginners taught by mail. No teacher required. Seif-in- struction Course for Advanced Pianists. J.earn 259 styles of Bass, 684 Syncopated Effects, Blue Harmony, Oriental, Chime, Movie and Café Jazz, Trick Endings, Clever Breaka, Space Fillers, Sax Slurs, Triple Bass, Wicked Har- mony, Blue Obligato, and 247 other Sub ects, including Far Playing. 138 pepe of REAL Jazz, 25, words. A Postal brings our FREE Special] Offer. Waterman Piano School, 1826 W. Adams St. Los Angeles, Cal. Big Money for You as an Automobile Mechanic These four practical books, written by five well known teach- ers of automobile practice, will teach you right in your own home during your leisure time just what you need to know abo ut automobile troubles and repair. They will teach you aut bile construction, maintenance and repair as experts know | the mm and will help you to earn an expert's pay. Practical Automobile Library: Four Books—$1.50 in 10 days and $2 monthly for 6 months—only $13.50 in all! Hundreds of question-answering diagrams — hundreds of clearly-marked illustrations—make the books plain and readily understandable. All the explanations and descriptions are clear, simple, direct. Every chapter is packed with definite, step-by- step, n= «min “© © cenaammeaes Here is your opportunity to enter a big-pay field. No Mone Sent FREE — Mail the Coupon “FREE EXAMINATION COUPON McGRAW-HILL BOOK CO.., Inc., 370 Seventh Ave., New York Send me foe 10 days’ free examination the New Practical Autom: bile Library. If satisfactory, I will a you $1. 4 in 10 days $2.00 mont! until the special price of $13. s paid. If not wanted, | will seturD 3% at your expense + oO. Director Amer is thefirs field to r of guara with @ | tract, if to accon you expe doubt ar the train a better | or it wil To better ant servi tional en which ke employer ver the extra ch and grad presence eree=="15

Page 225

POPULAR MECHANICS ADVERTISING SECTION yaranteed Tin Service forAmbitious Fees a| Men! 1 Employment —then help- ing you get it, Training ‘Preparing you fora better job g! all mechanical, building, and engineering lines swing open for a= you! There are more well-paid Drafting jobs open today f y A than in any other one profession or trade. There’s a variety, alt ou re a fascination to Drafting that will grip you. No other _ Now Earn- work is so interesting, so well paid — no other field offers al, equal opportunities for quick promotion. * 0. C. MILLER ing $40 a . ! = Director Extension Work Week or Less | /¢ Draftsman isthe Boss of the Works! . The I guarantee to prepare you Destroy blue-prints and plans, and the wheels of all . American School is thefirst in the home-study field to recognize the need of guaranteeing its courses with a money - back con- tract, if the training fails to accomplish the benefits you expect. Thus all risk and doubt are eliminated — either the training will help you to abetter job and araisein pay or it will cost you nothing. To better carry out this import- ant service, we maintain a Na- tional employment department which keeps in touch with the employers of Draftsmen all ver the U.S. All @his without extra charge to our students and graduates. Professional Outfit Given! You will naturally expect the American School togive you the best kind of instru- ments and tools with the best kind of training. This outfitis good enough to use professionally after you fin- ish your training. Mail cou- pon for description. Phiten | fora fine drafting position, right in your home, in your spare time; then I guaran- tee to help you find such a position paying at least 50% more than you earn today, within 60 days after you complete this training, or I will refund small amount you pay for tuition. We make this agreement to prove this instruction will make you areal Draftsman. Back of this guarantee are the en- tire resources and reputa- tion of this million dollar institution. C Mla O. C. MILLER Director Extension Work Industry will stop until new ones can be made. Every move of every workman on the job is controiled by the Draftsman through his plans. Railroads, public works, buildings of a hundred sorts, machinery, electricity, automobiles — all manufacturing and construction start on the Drafting table! That’s the kind of work to get into, friend. Where you have the same chance as anybody else to make a quick success! —to prove you can learn at home in spare time! You'll be surprised how quickly you can learn Drafting by our new one-step-at-a-time method. We start you off by doing ac- tual Drafting room jobs from the very beginning. Before you know it, you are batting out professional plans like a veteran. Get the first three lessons--the coupon brings tham. Do them. Test your ability to master Drafting at home. Without cost or obligation. 4 Chmerican@gpchool Dept. DA-74, Drexel Ave. and 58th, Chicago O. C. MILLER, Director Extension Work : American School, Dept. DA-74, Drexel Ave. and 58th St., Chicago. Your offer to send me three lessons free and facts about the oppor- tunities in Drafting and about your course, looks good to me. understood I am not obligated in any way in making this request. Name ..........-. BR iccctcttnn Occupation._..__.........- a It is Age

Page 226

POPULAR MECHANICS Let us tell you how thousands of menand women suffering from rheumatism, neuritis; paralysis, nervousness, skin diseases, headaches, constipa- tion, sprains, prostate trouble, goitre and many otherailments, even hay fever and asthma, have found quick relief—new health and vitality with this marvelous, scientific invention. Pains vanish almost instantly. Days “Violetta, 2 For Health—Beauty—Vigor Trial Endorsed and used by hospitals, sanitariums and physicians. Every home can now have one. Saves hours, days, months of suffering. No medicine. Painless, pleasant treatment. Only the violet ray can penetrate toevery nerve affected. Simple, safe, painless—anyone can use VIOLETTA. Why suffer pain and poor health when you can try VIOLETTA 10 days FREE. This Book FREE | Tells all about violet rays—how this marvelous discovery by Nikola Tesla, the electrical wizard, now brings this " mysterious curative power to all. Con- Iyk Ly tains many astounding testimonials / VT | from our thousands of satisfied users. //fimay — Saves $10 to $25 on the Mead Bicycle you select. A You can have your choice of 44 Styles, colors and sizes. free on approval. $21.50 up. . ieycle 30 Days Free Trial celect” tron te bag aff - @ month to be sure you like it. quality, factory prices. Save big money a lee

Write today for free atalog, € prices DEPE. {i> CHICAGO fs newoffer. ft id marvelous

When You Enroll New Short Easy-to-Play Course One of the most efficient methods of instruction ayer invent: now offered you. You will understand it, - Play Popular Music in Half an Hour Your lessons come from lovely Hollywood, where the Stars learn to play Hawaiian Radio Tone Guitar. This fascinating instrument, brings you e)o* of a far-off, dreamy, tropical isle You may new hear, that lingering, quay ering Nee one you have hear on the Radio. grams, it thrills you, makes y \\ >) or hear it again and again + , The Hawaiian-Radio Tone eee vA Guitar produces that 2 ¥ ‘ { ful, singing-hummi :g love. {It comes t Filmland, where it is re nightly.) Our Easy-to-Play Lessons teach you to produce the you desire so much to hea Native Hawaiian Teach €f8 have worked out the simple lessons wh reveal the secrets When you tune in on Hawa

Hawatian Teachers of Hollywood, Studio 1A~ Hollywood, Caltforo's Please send me full information about your Free Hawaiiam Radie-Tone Gutta’

Address

Page 227

POPULAR MECHANICS ADVERTISING SECTION heh LIMITA LLL LLL LLL LLL LLL LLL LLLLLLLLLLILLLLOLLLPOLLOLLLLLLLLLLLLLLLLLPLLLLLLLLLLLLLLPLLLLLLLLLTLLPLOLLLLLTLLLLOLLELLLLLLLLLLLLLLLLILLDLLSLI TLL LS ou Can Set the Pace — BUT IT MAY COST YOUR LIFE/ STRONGFORT Builder of Men

I have been conspicuous in the field of physical culture and muscular development for over 25 years. I am known on both hemispheres. I first made my impress on the public mind by develop- ing myself to marvelous symmetrical proportions — my bodily perfection being the subject of wide comment wherever I exhibited — and performing, in Europe and America, incredible feats of strength. I had ‘‘the goods" and I delivered them. —Lionel Strongfort

Physical and Health Specialist for over 25 Years You, young fellow, may be one of those chaps who thought you could set the world on fire and fiddle while it burned. Nero tried that—you know what happened to Nero? You thought you were different from most young fellows. You could hit on all eight cylinders and get away with it. You could carouse, dissipate, stay up all hours and make up for your excesses by taking poison booze or drugs and dope to brace = up. You had a strong constitution—nothing worried you. Wild parties couldn't too fast for you—you were a real roaring lion with the girls—the life of the party— whoopee! But, now, you see what’s happening to young fellows who saw no limit to life—who had “vitality to burn!"’ They're slumping—they’re slipping—they're despondent! Read the papers. Ask yourself what is at the bottom of these frequent cases of despon- dency. If the truth were told, you'd learn that these poor devils had laid the founda- tion for their tragedy in their youth. Added excesses—speed, carousing, boozing, doping, associating with degenerates—piled up a burden Nature could not stand for— collapse followed. Are you going to go on until you find yourself in the same physically broken condi- tion? Are you going to keep on tapping the reservoir of energy Nature gave you? Don't do it, boy. I sound this warning as a friend, a protector. I have seen so many go down to physical and mental disaster that I must warn you to stop right where you are—NOW. Heed the Danger Signals You're tearing down a whole lot faster than you are building up and the longer you keep going as you have the worse you're going to get. Now is the time to take yourself in hand—before it’s too late. And you can do it. STRONGFORTISM will show you how, but you must act now. Each day you weit, each day you delay makes it just that much harder to bring you back. Let STRONG- FORTISM help you. Let it restore in you those vital powers that you know you are losing and losing fast. STRONGFORTISM will build up that body of yours in such a way as to make a brand new fellow out of you. It will make you fit for any physical task—give you pep, vigor and punch. You will radiate health and good cheer. Confidence will fill you so that you won't be afraid of anything or anybody. STRONGFORTISM WILL BRING YOU BACK —not with medicine or dope—but with the aid of Nature. You cast Nature aside in those days of early, frivolous youth. I will show you how to work with Nature. I will build you up inch by inch—internally and externally—until you are a robust, powerful fellow—a real He-man who will command respect and admiration wherever you go. I have done this for thousands of others and I will do it for you through my original and unfailing methods. Send for My FREE Book The experience and research of a lifetime are contained in my wonderfully instructive book, “PROMOTION AND

NY wsssrtstsddsdsdddsddsedsrdsrdresdttbdd ddd dddtdédd tds badd ddd d stb bd tdddddddbdddddtddttdd ttt std tbddttttttdddttitdtttittistsbbessbbdsstesesesl@@l@D@<IALAZL CONSERVATION OF Steeeeeeeeeeeezea: HEALTH, STRENGTH Send this FREE Consultation Coupon AND MENTAL ENER- ABSOLUTELY CONFIDENTIAL GY.’ It will tell you frank- lv how youcan make your- . Lionel Strongfort, Strongfort Institute, Dept. 345, self over into a vigorous Newark, N. J.—Please send me absolutely free my copy of your book, ‘‘“PROMOTION AND CONSERVATION OF HEALTH, specimen of vital man- § STRENGTH AND MENTAL ENERGY." I am enclosing 10¢ hood. Just mark the sub- (one dime) to help cover mailing expense, etc., and have marked jects on the free consulta- (x) before the subjects in which I am most interested tion coupon on which you .. Catarrh Overweight Great Strength want special confidential ..Colds Constipation Lung Troubles information and send to Headache Weak Eyes Stomach me with a ten-cent piece Rupture Rheumatism Disorders Asthma Weak Back Round Shoulders (one dime) to help pay Thinness Nervousness Increased Height stage, etc. ‘as an- Pimples Short Breath Muscular Builder “ied eee Insomnia Weak Heart Development Send for my free book RIGHT NOW—TODAY. # Other Ailments STRONGFORT INS sm LIONEL STRONGFORT, DIRECTOR, Age Occupation

N Street N DEPT. 345 NEWARK, NEW JERSEY, U.S. A. - . \ s City

Page 228

L. L. COOKE —the man who has trained and helped many thousands of other men into Big- Pay electrical jobs in all parts of the world. when I enrolled. Now with my own Electrical Shop I make as high as Oa day.’ A. J. Daigneault 225 Worcester Southbridge, Mass. $3.500 A YEAR! **Dear Mr.Cooke: When I began with you | was just a common laborer ow my salary is$3,500 a year. C. O. Beckett 108 Maple Heights New Lexington, Ohio There are jousands¢ Big Pay Jobs tobe had/ Gouklss a POPULAR MECHANICS ADVERTISING SECTION ake It in the big pay field Slectricilty I ON'T be a wage slave all your life—don’t spend your best days in a miserable $25 to $35 a week job—pinching the pennies and barely making ends meet—when thousands of men, no smarter nor luckier than you, are drawing down $70 to $200 every Saturday as “Cooke” Trained Electrical Men. It’s your own fault if you don’t do the same. Blame yourself if your pay is small when I've made it so easy for you to learn to earn $3,500 to $10,000 a year in electricity! Be a “Cooke” Trained Man I'll show you how—in your spare time—in the quiet of your own home—without losing a minute from your regular job! I'll train you in a clear, simple, quickly-grasped unforgettable way with my famous ‘““Work Sheet” and “Job Ticket’’ Method the same method that has landed more than 10,009 fellows like you in $3,500 to $10,000 a year jobs the same method that Electrical men are praising and great Electrical concerns recommend to their employees. “Schooling” Not Necessary Don't think for a minute that you need a college education or a high school diploma to become a “Cooke’’ Trained Big-Pay Man. You don't! Mighty few of my “boys’’ ever went farther than grade school. But that was no drawback. With the Six Big Outfits of tools ard apparatus that I furnish without extra charge, they got ‘ Name.... . Address... Coan 0 | You may send me, FREE and fully prepaid, your simplified, practical trainin: lines. They learned by doing—they thoroughly—just as if was constantiy at elbow. And in no time at all they were expert commanding, and getting, Big-Pay! Make Money While Learning Another amazing thing about “Cooke” Tr is that it pays for itself as you go along. Yes You'll hardly have begun the Course wi show you how to make your spare hours c« cash! I'll show you how to get jobs—how t« work—what to charge! And all while you learning! Afterwards comes the Big Job—t ’ay—the great opportunities that will mak independent the rest of your days. Investigate—Mail Coupon Don't delay! Get started! Mail coupon rig for my Big Book—the same book that has r the pay of thousands of men—the book that show you—yes, prove to you—why ““The Ci. Trained Manis The BIG-PAY Man'’—alwa l everywhere! It's FREE—just mail cou; > at oncel L. L. COOKE, Chief Instruction Eng. L. L. COOKE SCHOOL OF ELECTRICITY Dept. 1-A 2150 Lawrence Ave., Chicago, III. along work ) OUPO e oft 4 | L. L. COOKE, Chief instruction Engineer, Dept. 1-A, 2150 Lawrence Ave., Chicago, Illinois “Secrets of Success in Electricity,’’ with all particulars « your Home Study Course in Electricity. ihe ot emineDEe 6460 0903 604 State.......-. Residents of Canada send coupon to R. A. Farrow, speci Representative, 7 Medbury Lane, East, Windsor, Ont., Canada. 2. p70 BP Ss 4 | | | | |

Page 229

POPULAR MECHANICS ADVERTISING SECTION 49 Classified Advertisements WORLD'S BEST WANT AD MEDIUM \dvertisements in this section, 30 cents per word, each insertion, minimum 10 words, payable in advance. To be inserted under proper classification in July issue, copy should be in our office May 18th ADVERTISING AGENCIES SAVE money on repair parts. 50 to PATENTS. Time counts in applying for ——TTTISERS: Amazing growth made | 75% off list prices. Parts guaranteed sat- | patents. Don’t risk delay in protecting ADVER our clients, who started last May | ‘sfactory. Gears, axles, drive shafts, your ideas. Send sketch or model for in- ) weekly. Now spending $500.00 wheels, bearings, motor and transmission struction or write for free book ‘‘How to “Name furnished on request. We'll | Parts for old and late model cars. Cyl- | Obtain a Patent’’ and “Record of Inven- ‘wut your proposition over. Cash | inder blocks for Ford, $8; Dodge, $12; | tion” form. No charge for information on ‘r thirty years of experience. Copy | Chevrolet, $10; Overland 4, $15; Lycoming how to proceed. Communications strictly rature composing service Free. | K. $15; Continental 7W, $15, 7R, $18; | confidential. Prompt, careful, efficient serv- word ad inserted in the following Hudson, $20; Buick 6, $18; Studebaker, ice. Clarence A. O’Brien, Registered Pat- + Sunday papers for only $10.00: | $29. Special prices on quantity orders. ent Attorney, Security Bank Building (di- Birmingham; Gazette, Little | Prompt service. Price list free. Century rectly across street from Patent Office), ‘ Indianapolis; Journal, Minneap- | Parts Co., 1725 8. 18th St., St. Louis, | Washington, D. C. See pages 140 and 141. Kansas City; World-Herald, | Mo. IR es 753 TIME, Labor and Money Saving Ideas Courter, Buffalo; Enquirer, Cin- “SAVE 40-80%. New and Used Automo- for all who own, drive or repair autos. These Gazette-Tiines, Pittsburgh; Banner, tive Parts, 2,000 models, also truck parts, practical kinks are based upon the actual Proof of insertion cmosnnnend 5,000 bargains. Bankrupt supplies, tires, experiences of hundreds of owners and re- efunded. 52 page rate book sent generators, $10 up; carburetors $3.50 up. pairmen. Three books, Auto Owners, Auto rank W. Lenhoff Advertising Agency Complete Khaki roadster tops $10; khaki Repairman’s and Auto Tourists Handbooks, | 1897), 600 North Michigan | touring, fit most 5-passenger, $15. Wheels, regular $1.50 value from Popular Mechanics ago. Chicago’s most progressive gears, radiators. Brightman Auto Parts Press will be supplied at 98c, plus the post- Co., 321 Windsor Ave., Hartford, Conn. age C. O. D. for a limited time only. Send Dollar Ad may put your propo- CARBURETOR Supplement to famous your order today to Popular Mechanics Press, $10 pays for a 4 line 24 word Dyke’s Auto Encyclopedia. Just out. Deals | Room 906, 200 E. Ontario St., Chicago. | ad one Sunday in 9 of the largest with every make of carburetor. Just what ~ AUTOMOBILE—Make your own motor car, Reach over 6 million readers. every auto service man has long been in need toy size, operated with motorcycle engine. Tribune, Buffalo Courier, St. of. 106 pages, 246 illus. Price $2.00. Send Any boy can make it. Costs little aside t-Dispatch, Pittsburgh Press, In- for your copy today. C. O. D. if you from engine. Full directions with draw- Star, Atlanta Journal, Birmingham prefer. Popular Mechanics Press, Room 906, ings an dimensions in The Boy Mechanic, innati Enquirer, Little Rock Ga- 200 E. Ontario St., Chicago, IL Book 3. Send no money. Pay postman ree catalogue showing other lists of SY-LENT Pawe—rubber “heels for the postage and $2. Popular Mechanics Press, pers | magazines = 5 — motor—will kill that vibration period. Room 906, 200 E. Ontario St.. Chicago, Il). \dvertising Agency, 22 West Jack- 1.75 set. Vapor Vent, the perfect crank- |, Chicago. Largest classified ad- = ventilator. permits changing motor = AUTOMOBILE SERVICE EQUIPMENT , igency_in the world. only every four thousand miles. $3.5 ASS ‘DV RTISE in the classified section of | complete. Both sent postpaid $5.00. CONSTANT Potential One-Day Battery I , ers and magazines, to secure help, ton Mfg. Company, Belleville, | Charger, HB Make, first-class condition, r to sell. oud advertisement NT ane — priced for quick sale, terms if desired. ig Metropolitan papers $10.00. Nearly | ~ AUTO Tircs—represent us. Buy them | 4,>#reain. Write to W. E. Jordan, Box nillion circulation. Many other bar- | ot wholesale. Big saving. Send for | M671. Troy, Ohio bina ie mas lists. Write for Free 58-page Direc- prices. Federated Motor, 250 W. 54th HB Universal Test Bench practically 26. Brinckerhoff Advertising St.. New York, N. Y. - new at a big saving. A bargain for any ‘7 W. VanBuren, Chicago. Ruy “a 17?-battery caparity Scioto Bat- Auto Repair or Electric shop. Will take “ADVERTISE in 24 Big Sunday Newspa- | tery Charger for $50 Complete Battery small payment down—balance monthly. E. ers, 24 words $15.00. Excellent for secur- Shop equipment for $129.74. Get catalog. C. Galbreath, Box M673, Troy, Ohio. _ nts, Salesmen, and Business Oppor- | Adams-Barr, Columbus, — Ohio. _% HP Twin Cylinder Air Compressor. Catalog listing 1,000 leading “CHEVROLET Parts. 1 can save you from Fine for = Service Shop or Auto Re- Weeklies, Mail Order Magazines, 35 to 50% off on all used Chevrolet parts, all | Pair Shop. Used only a few weeks. Bet- ng. Free. Wade Advertising, Balti- models from 1921 to 1926. Write me for | et than a new one, priced to sell. Lat- ig.. Chieago. your wants on Chevrolet parts. Mr. A. est model beltless Upright HB. Terms "NEWSP APER — Magazine advertising— | Naver, 2701 MeNair Ave., St. Louis, Mo. and guarantee. D. C, Jenkins, Box M672, a 1) ~ amend Martin, 276B VU LCANIZING Auto “Tires is a Paying Troy, Ohio. , NESTLER Rubber Fusing Outfit, with SIX Word Line—355 rural weeklies $3.55. - up eee Wee eee —= shop tools, instructions, etc. This plant will imeyer, 4112-M_ Hartford, St. Louis. 1 Equipment Exchange 108 East 11th, repair or retread any size tire. Will sell FOR ADVERTISERS Lee Angeles, Calif. , reasonable Roy 3B. Hutchason, Olney, Il YOUR 25-word advertisement in ““The MAGNETOS, "Sioa, Generators, Igni- FOR FORD OWNERS Winner” Tic; sample copy 10c. Witts tion systems, spark plugs, part, timing Sales Co., Rush Springs, Okla. chains, sppetting. Meinert oe Co., SHIMMY and Road Shock Eliminated i) WORDS insert 60 magazines $2.00, | 1759 E._2ist_St.. Cleveland, Ohio. from your steering wheel with Stimco Empire Agency, Shawano, Wis. Pe a ane gy — Steering Stabilizer. Make your steering ADVERTISERS’ } al, | ition, makes. ma le gear irreversible like large cars. io indeoee posta Symmes edition. | Critchlow, C1-805, Wheaton, Ill. whether balloon or hard tire model. i75P Broadway, New York. DYKE’S Automobile Encyclopedia. Latest —Guaranteed. Agents wanted. Steering ADVERTISE in 275 “country newspapers, 14th edition. Information on repairing and | Improvement Co., Portsmouth, N. H. _ 28 words, $10, Keator, Hartford Bldg., | @dijusting every part of all motor cars. How UNDERSLUNG with “RKO” Swing Lo to find trouble — fix it. eons. -~--- Irons. See ‘‘Red-i-Kut’” ad page 138. ~aewimane Ti Wisdous dunehaumna. Pay postman the postage an opular — 5 73 3 I'S, Drawings $1.50. . Window Cartoons, r PUT a “Bingo” Timer ,on your Ford. GPO, _Bx471, New_York. > Be Chicago. Til. Room 906, 200 E. Ontario | «yor, Pep-More Power.’ Money-Back Sy Roo -— | Guarantee. $1.50 delivered with simple SALES PROMOTION WE make over 300 new, artistic radictor | instructions to install. Write for exclusive ' TO $50,000 Daily Sales Developed | ornaments. One of them was designed es- | Arency—fine proposition. United | Machin- ; 28 years for clients by our — pecially for 4 one. — A... ery Company, Cincinnati, U. 8. ins, copy, campaigns. One product, | you mention Popular echanics. J > | PORD Brake ‘ “ in idea; this year $100,000 orders | Florman Company, 153 Lafayette Street, me Sones ‘Banda Fifty year old concern desired 50 New York City. P : } se {2 — case when Tuttle External Adjusters are ¥ representatives in 1925; we pro- AT Last! Reasonably priced “Auto Em- installed. Set, $2 50 Barker Factory, 5 . in ~~ mentte. 700 foaen_ blems for every ane — for -—_ Crescent Street, Norwalk, Conn, nths a each, for another. en 1.25. Write for attractive selling proposi- . Oe ee Sales Promotion Manager Larkin Co. a "Bhd free Sample Case offer. North mts LEX icy at ne. a sales problems for Free diagnosis. | Central Distributors, Dept. 9, Ashland, "i a “in Ind merican Sim- C. Johnson, 118A Woodbridge Ave., | Ohio. plex__Co., _Anderson, _In¢ “Points make SIMPLE One Piece Valve Adjuster and ‘BL ACKBOARDS for all purposes; | plain, os improved _ Vibrator te set Silencer quickly installed without tools, and. lettered. “Wm. Pinnd, 4049 postpaid $1. 8. D. Brown, 198 South | Saves gas, time and nut adjusting Stops Ave., Chicago, Ii. Newburgh, N. Y. click; takes up wear. housands | satis- — = fied. Send dollar for complete set. C. AUTOMOBILE SUPPLIES AUTOMOBILES W. Young, 2121 New York “Ave., N. W., FREE trial of new spring lubricator. Washington, D.C — ne Stops squeaks. Needed by every car AUTO TOURISTS—Here are 133 practical ‘FORD Electrical Equipment Troubles— Great money saver. Write for plans for making touring easier, less expen- Locate and remedy them easily yourself with without obligation. Turner Man- sive and more enjoyable. With these we the aid of our book ‘Ford Standard Elec- ufacturing Co., Kokomo, Ind. supply a Touring Atlas of the U. 8. showing trical Equipment.”” Why pay big garage YOU age wanted to resilver mirrors at road maps of every state. All this informa- bills? Battery, ignition, starting and light- home. Immense profits, plating autoparts, | tion for the small price of 98 cents plus the | ing covered. Order today. When postman head li ights, tableware, stoves, etc. Outfits postage. Pay postman when he delivers the hands you the package pay him $1.98 and furnished Write for information. Sprin- package. Popular Mechanics Press, Room the postage. Popular Mechanics Press, Room kle, ater, 77, Marion, Ind. 906, 200 E, Ontario St., Chicago. 906, 200 E. Ontario St, Chicago.

Page 230

50 POPULAR 1 AUTO Gas Saver Free. All makes. Amazing Critchlow, €C2-805, To introduce. mileage increase. Wheaton, Iil. MOTORCYCLES, BICYCLES AND SUPPLIES MONEY Saving Large stock of Used and up. Send for Now! Motorcycle pairs for all makes son Agency, 2525 waukee, Wis MOTORCYCLE Guaranteed. Shipped on log free. Floyd Clymer, Denyer, Colo. _ ar SEND stamp for Bargain Bulletin. All makes rebuilt motorcycles at lowest prices. Used parts half price. Ash Motor Cor- poration, Rochester, N. Y. REBUILT Indian Motorcycles, lowest prices. Used motorcycle parts. Hurck In- dian Co., 2127 Locust, St. Louis, Mo. INDIAN motorcycles $50. Standard modes $10. Deposit with order, balance C. O. Stern Bros., 1790 Ist Ave., New York City. ‘DON’T buy a Bicycle Motor Attachment until you get our prices. Shaw Mfg. Co., Dept. Galesburg, Kans. AVIATION Motorcycle Bargains— Harley - Davidson—$50 Free bargain bulletin Parts, accessories, re- Knuth’s Harley-David- Fond Du Lac Ave., Mil- pebuilt. Cata- Broadway, Used, approval. 810 Bargains. oT 27, LEARN to Fly; $100.00 including Solo. We guarantee to solo you regardless of the number of flying hours required. Our in- structors are ex-army aviators and air-mail pilots with wide experience. Our training equipment is the best obtainable. Our course requires about two weeks, depending on the individual. No bond required, no charge for breakage. Eight years without an accident. 76 students graduated in 1925. Commercial aviation is a rapid growing industry. Don’t delay! Enroll now in one of the oldest and best known flying schools in Ameria. Write for booklet. Robertson Aircraft Corporation, operators of the United States Air Mail, St. Louis-Chicago, Lambert-St. Louis Airport, Anglum. Mo. TEST Y Meee eh PATENTS. Time counts in applying for patents Don’t risk delay in _ protecting your ideas. Send sketch or model for in- struction or write for free book ‘‘How to Obtain a Patent’ and ‘Record of Inven- tion’’ form. No charge for information on how to proceed. Communications strictly confidential. Prompt, careful, efficient serv- ice. Clarence A. O’Brien, Registered Pat- ent Attorney, Security Bank Building (di- rectly across street from Patent Office), Washington, D. C. See pages 140 and 141. TEN Lesson in the air of twenty minutes each will make you a pilot by our advanced method of training. This, together with our five weeks shop course, at $100.00, makes America’s oldest aircraft factory the most popular flying school. Work after class hours guaranteed. Special summer evening course, including shop work, field and flying, $185.00. Employment assistance on jobs paying $18.00 to $40.00 per week. Heath Airplane Com- pany, Chicago, Ill. AERONAUTICS! ‘‘Aeroplane Theory and Practice,’’ engines fully. ngines in by Rathbun, decribes Includes all makes. For mechanician, builder and flyer. Send no money. Just order on a postal. When post- man hands you book, pay him $2.50 and postage charges. Popular Mechanics Press, Room 906, 200 E Ontario St., Chicago, Tl. ~ AVIATION positions pay $2,000 to $10,- 0600 a year. Prepare for flying and ground positions thru thorough and complete home study training. Write Dept. K-6, Western Airplane Corp., Monadnock Bldg., Chicago. TO liquidate affairs of an aero com- pany I will sacrifice following: Thomas Morse fuselage $25.00, Curtiss $40.00, Lawrence Motor with propeller $75.00, Gnome motor $32.50, LeRhone $25.00, Pro- pellers $5.00 up. Photographs furnished with complete description if you mean business. 4. E. Waldron, Box 283, St. Paul, Minn. EV°RYTHING for the Airplane Builder. Complete fuselage fittings $27.00. South- eri Airways, Inc., 210 College, San An- tonio, Tex $188.00 BUYS all parts, sembled wings, to build the new Heath “*Parasol” sport plane, using motorcycle en- gine. Simplest to construct. Safest to fly. $575.00 ready to fly away. Send 5e for eircular. Heath Airplane Company, Chi- cago, eels BLUEPRINTS, | dride’’ boats, sleds. Ostergaard Aircraft, Chicago. , including as- Prices reduced. “Aero Blueprints only 50¢ each 4305 No. Narragansett, MECHANICS ADVERTISING LEARN expensive instruct “Club Plan.” Registered U. 8. best equipment. ( —_ Dearborn St., Chicago. Your Spare Time to Airplanes. Course $150.00. $15.00. Wallace Pk. Blvd., Chicago, Ill, THE American School of Aviation an- nounces a new correspondence course in Me- chanics of Aviation. A _ thorough training in Practical Aeronautics. American School of Aviation, Dept. 1861, 3601 Michigan Ave., Chicago, I. qi SEND dime for 12 inch mounted pro- peller and circulars on free three foot model aeroplane. No selling. Aero Shop, 3050 Hurlbut Ave., Detroit, Mich. BIGGEST, Best Catalog Model Aijr- planes, Parts Supplies; 5c postpaid. Ideal Company, 165% Spring Street, New York. DICTIONARY of Aviation, $3.90. Lan- guages Publishing Company, 15. W. 18th Street, New York ~ ‘PHE Age of the Air is Here. For reli- able information on both airplane building and flying we recommend ‘‘Aeroplane Con- struction and Operation,’’ by Rathbun. All features of construction treated. Send no money. Pay postman $2.50 and postage Popular Mechanics Press, Room 906, 200 E. Ontario St.. Chicago, Tl. AIRPLANE Supplies wholesale prices; gen- uine leather helmets $1.95 up; aviator gog- gles 70c to $7.50; new propellers, 8’ $3.50; flying suits with insignia, $9.50; new TM Wings, $15.00. Air Transport, Carle Place, New York. to fly by of all. and have cago Flying Club profit), 330 8S. PREPARE in and Build Shop Least Fly Flying and Evening Shop Course only, Aircraft Co., 4710 Irving BOOKS AND PERIODICALS HYPNOTISM ~ wins Fame, etc 25 Easy page illustrated Popular Institute, Chicago. “WHERE'D ¢ words, 20c. City, 0 SEND for our unique catalog of 5000 books listed alphabetically under subject headings. Free on request. Popular Mechanics Pres_, 200 KE. Ontario St., Chicago. HYPNOTISM easily _ learned. guaranteed. Postpaid, $1.10. Co., Dept 3, Springfield, Mass. ANSWERS to mathematical office, store, shop, bank, farm, Explains and simplifies every principle of arithmetic, mechanics and mensuration. Send No Money. Just ask for Ropp’s Cal- culator.’" Pay postman $1.00 and postage. Popular Mechanics Press, 200 E. Ontario St.. Room 906, Chicago, MM. NEW Book. Batteries, How to and Repair Them. $1.00. Bureau, 94 Bonham St., Paris, Texas. PUZZLES! If you like them we recom- mend an illustrated book containing 122 of the best Mechanical Puzzles. You can have loads of fun working out the solutions as enough hints are given in the text matter to enable one to do so. Pay postman $1.00 and postage when he hands you the package. Address Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. 7 SHOP Notes for 1927. Get your copy now. Only a limited edition. Contains all the articles published in the Shop Notes depart- ment of Popular Mechanics Magazine during 1926. Send no money. Just write a postal and we'll send 1927 Shop Notes and any one of the other following numbers, 1908, 1912, 1913, 1914, 1915, 1916, 1917, 1919, 1920, 1921, 1922, 1923, 1924, 1925, 1926. Pay the postman 98 cents and the postage when he hands you the two books. Popular Me- chanics Press, Room 906, 200 E. Ontario St., Chicago, Til Em Ww HAT Subjects Interest You? Selec’ this list of helpful worth while books. Social Letters Made Easy, Spelling Made Easy, How to Develop Your Will Power, Tricks and Magic Made Easy, Bookkeeping Made Easy, Chemistry for Beginners, How to Work Your Way Through College, Confi- dential Chats with Boys. Price $1.25 per volume Pay postman price and postage when he hands you the package. Address Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. PICTURES AND POSTCARDS JOIN Live Postcard club, Membership Lists including Catalog 1l0c. Harvey Teeple, Decatur, Ind. Health, Wealth, Lessons and 248- reference guide $2.00. 430-XJ_ Milwaukee Ave., ~ 8,700 Kansas Cain Get Wife?” Jabe Studio, G. D., Lessons Smith Pub. problems of or factory. Make Information from SECTION VIEWS in natural colors, Thirty City of Detroit; views, twenty-two views of Belle Isle Park; twenty views, Ford plant, world’s largest; twenty views of Detroit's largest industries and hotels. Each folder size 426 in. Mention views wanted. Price each folder 10c. Atlas View Co., Dept. A, Box 681, De. troit, Mich. ART Pictures, Books and Novelties. log 10c. Howard Sales Co., Dept. 15 Folsom St.. San Francisco, Calif. 100 PHOTO Postcards from any $3.00. Gillespie, Photographer, 11 land St., Boston, Mass. 20 CEYLONESE Girl Models bill. Art Photo Galleries, 10 Road, Colombo, Ceylon. FREE, True-Blue Book Sachange post - cards, stamps. Ericson, Elroy, W KOMIC jollying Cards free stamp. Address Home Products (o., lock, Calif. Cata- 118 Picture, Port- Dollar Temple Incloge Tur- TT —-— GAMES, ENTERTAINMENTS AND PLAYS WORLD History Game describes titles, $1. Bicutting, Campbell, Calif VENTRILOQUISM taught almost anyone at home. Small cost. Send 2c stamp today for particulars and _ proof. George W Smith, Room 8-172, 125 N. Jefferson Ave, Peoria, Il. in QUESTION and Answer fad sweeps coun try. Send for a copy of the best book on this popular pastime ‘“‘Ask Me Another.” 2000 Questions and Answers, forty informa- tion tests with the scores of 69 people you know from all walks of life. Pay postman $1.60 and the postage when he hands you the package. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. 100 LIGHTNING Chalk Talk Stunts $2.00 Cartoonist, 2925 Euclid. Kansas City, Mo CHALK-TALK your way to popularity Audiences at your feet if you learn how to entertain with a few simple pictures. Little artistic ability needed. “How to Chalk Talk’’ tells what to say and what to draw Profusely illustrated. Make $1 and more a night. Send no money. Just order on a postal. Pay postman $1.00 and postage Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ill. —s TRICKS, BOOKS AND OKER NOVELTIES MAGIC—Tricks, Books and Supplies. For Amateurs as well as the great professionals Anyone can learn through our instructions Feature Acts in Mind-Reading, Spiritual- ism, Rope Ties, etc. Large illustrated Pro- fessional Catalog, 20c. Chicago Magic Co., 140 So. Dearborn St., Dept. B, Chicago, Il! FOR something different, send 10c for ‘‘Fun-Magic-Mystery.’’ New 80-page Book of 500 Tricks. Also contains Catalog larg- line Magic Tricks and Supplies in South, at lowest prices. Send 10c t Jay! Lyle Douglas, Station A, Dallas, Texas SEVEN Magical Delusions and Catalogs— 25c. Gilmagico, Morgan Park, Tl. MAGIC Trick Cards That Are Absolutely guaranteed. Free samples. Write me to- day. C. D. Blankenship, Adrian, W. Va. _ FREE with $25 order die box. Send 20c for our large catalogue of tricks, wigs, sen- sational escapes. Oaks Magical Co., Dept 548, Oshkosh, Wis. _ ELECTRIC Fun.! Seventy stunts, volts, $1 Tacutting, Campbell, FORTUNE-TELLING and Dream —CGypsy Madge’s big 66-page size, Gypsy Oracle (smaller), 1l0c. G. Wlsea Bowling Green, Ohio. I CARD tricks. Coin tricks, Hypnot sv Ventriloquism. 64-page books Com] guides 10c each. Geo. Fenner, 24! ferson, Louisville, Ky. BECOME a Handcuff King! Fool friet Mystifying! Absolutely new! Full instr tions 25c. Price, Harleysville, Pa FREE: “Catalog: ‘of Amazing Tricks, Wo derful Novelties, Funniest Jokes. Theodor King, 766! Main, V Worcester, Mass. READ Sealed Messages in Dark; retained by audience; burned message * pears on blank slate; spirit message appears on slate in sitter’s presence; spirit rapping’: spirits appear in the dark; answer ques! written on folded papers while blindf All this you can do with directions in ‘ Be- hind the Scenes with The Mediums sa best secrets of mediums fully exposed. The best because most baffling, yet all easy do. Send no money. Just writesa postal Pay postman $1.50 and postal charges. P0P- ular Mechanics Press, Room 906, 200 B. On tario St., Chicago, Ill. 1,000 110 Calif Books message

Page 231

lar lutely e to- Va. d 20¢

POPULAR LETE Book on Magic. 563 pages, 218 trations. Hundreds of tricks. The tand ok for years. Make money giv- “y entertainments. Send no money. Tust for Prof. Huffman’s ‘Modern Mac Pay postman postal charges and pular Mechanics Press, Room 906, E. Ontario 8t., NOVELTIES, CURIOS, ETC. Chicago, LIL

EG YI riAN Jewelry, Antique designs— brow earrings, bracelets, cuff links, . Novelty Tut-Ankh- Amer klaces $2; ladies’ silver shawl, { ‘ $7 searf pins, cents; spoons, holders, each 75 pencil, $1.50; searab gems, pair n, $1.23; 24 picture postcards, Cushion Pharaonic ornament, ¢ whisk hair, ivory handle, $4. Stick ind ivory, engraved, $6. Ivory pen, $ Oriental perfume, phial, $1. 50. Post bi " ach 50 eeacos free American dollars, paper accepted, Pharaos’ Store, Fouad Egypt. NI Puzzle. Spelled numbers appear as total Ten sample solutions for one dime. RK. C, Hill, 602 W. Jefferson, De- M troit, Nn, Stef Luxor,

STAMP COLLECTING , COMPLETE _ Beginning Collector’s Quilt for $1.00. The Imperial Combina- proved one of the most success- us that we have ever made, for it 1 ies tne collector who is just be- gir or the non-collector who wishes a suitable gift to a beginner, and exactly understand what is wanted, a complete well-rounded outfit. Nothing is lacking for the collector who is just commencing to learn the fascina- tion of the hobby. The Imperial Outfit is furnished in a etrong, attractive en- velope, and will be forwarded to any ad- dress, with your card enclosed if you so instruct us, The Imperial Combination contains the latest edition Imperial Post- age Stamp Album, with spaces for 4,000 stamps 1,000 Superior Stamp Mounts. s Seald Packet No. 15, containing Different Foreign Stamps, Scott guar- anteed Philatelist Millimetre Scale, the Guide to Stamp Collecting. An attrac- tively illustrated 48-page book which guides the beginner, clearly explaining step by step the things that collectors should do and know. $1.00 Post Free. Scott Coin Co., 1. W. 47th Street,

ful offerir

500 DIFFERENT Stamps for 25c! Big llection 500 Different Stamps from Bos- nia-Herzegovina, Crete, Epirus, Hong Kong,

Ieeland, Kenya and Uganda, Liberia, Malta, Nyassa, Tanganyika, Wallis and Futuna, Zanzibar, and other ‘“‘hard’’ countries. Cs gue value $10.00. Price only 25¢ to wal Applicants! Special Bargains: 1 p00 diffe rent 79c; 15 triangle stamps 49c; 100 Africa 50c; 160 Asia 60c; 100 Balkan States 35e: 100 British Colonies 25c; 100 French Colonies, 30c; 100 Portuguese Col- onies 50e; All & packets for $3.00! Mlus- trated Lists Free. Loma Stamp Co., 2221 Madison Ave., San Diego, Calif. MYSTIC’S “Queer Country” ~ Packet !! Contains searee stamps from the following range lands: San Marino, Antioquia, Conge Cyprus, Fiji Islands, Gwalior, H derabad, Iceland, Jhind, Kenya, Uganda, n, Monaco, North Borneo, Nyassa, omas Prince, Port. Guinea, Siam, Sierra "Leone, Tanganyika, Trinidad To- bago, Ubangi, Upper Volta, Wallis Fu- tuna Zanzibar. Get this wonderful packet of ‘freak countries’’ and make your friends envious! Price only lfc to val applicants! Write today. Mystic Company (Dept. 8), Camden, tk

New ¥

_ANCHERS $$$ Outfit—only 12c! Fine gle stamp; set German stamps with (pre-war) value forty million dollars (inter- esti ne'); perforation gauge, mme. scale; mall album; airmail set; scarce stamp from smallest republic on earth; newspaper set; icket_ good stamps from Travancore, Johore, Duteh Indies, ete. Entire outfit for 12¢ to approval applicants! (Nice pocket stock book, value 25c, with every order!) Ancher ee Co., 148% Clerk St., Jersey City, GET in on this Varieties broken up. Collection 50,000 Lists for approvals and want Liberal Dfscount. ference Required. Tower Stamp Co., 42 Westville St, Dorchester, Mass.

MECHANICS ADVERTISING $1.00 FREE. Black U. 8. Postage, Given Away with each order. Pioneer Stamp Al- bum with 500 illustrations, 150 different stamps from 40 countries, Syria, Lebanon, Hejaz, Liberia, New French Colonies, Brit- ish, Portuguese Colonies, South Africa, Aus- tralia, 500 hinges, 36 page illustrated cata- logue, All for lic. Big Commission to Agents for the Best approval sheets of stamps ever offered. Write for sample out- fit. Hussman Stamp Co., Dept. M, 620 Olive St., St. Louis, Mo.

VERY Special—500 Different 25c, 1,000 =— we. Ask for price lists and ap- leveland Stamp Co., Caxton Bag . Cleveland, Ohio. 70 DIFFERENT Foreign Stamps—70 Different Foreign Countries — including Africa, Asia, Australia, Europe, West Indies for 16 cents, Free—With each order we give our pamphiet which tells you “How To Make a Stamp Collection Properly,”’ also price list of albums—sup- plies and hundreds of Bargains in sets and packets. Queen City Stamp Company,

36, 604 Race St., Cincinnati, Ohio. “BEST one-cent ‘approvals in America. Hand, 1117 8. 60th St., Philadelphia, BP “25 DIFFERENT Portugal Colonies 5c. 25 Different French Colonies 5c. Hollub, Approvals, Deland, Fla, 200 DIFFERENT 7e. 100 U. 8. 25c. U. 8S. Stamps; Foreign Packets. Lists Free. Midwest Stamp Co., Kemper Bldg. Kansas City, Mo BIG Bargains, “ec up. E. Fort, Detroit, Mich, _ ; EUROPE Collection, 19th Babcock, 407 Century. Fine condition, over $7,000.00 catalogue. Price $4000.00. Also Mint Collection, German Colonies complete. High values, sheets of twenty. Catalogue $6300.00 Carl Hackert, 332 City, N. Y. conte ae FIFTY stamps, album outfit 12c. Won- der Packet 10c. Clover, 608 Goldsmith

Bidg., Milwaukee, Wis. _ STAMPS Sent on Approval. Premiums Given. Philip Peyser, 2216 Wyoming Ave., Washington, c ed FREE! 4 Confederate States Re- quest Approvals. 2e and - Southern, 1453 Graham, Atlanta, Ga. “150 GOOD mixed foreign ‘stamps 3 cents. Stanton, Niantic, Conn. 110 NEW Europe All Different. a won- derful collection cataloguing several dollars, free to collectors requesting our Net Ap- provals. Postage 2 cents. Badger Stamp ‘o., Milwaukee, Wis. FREE Hungary Charity No. 565 to 567 and a surprise packet given to those re- questing for my 2. and 3c approvals, and also my 59% discount. Chas. W. Schmidt, > ©. Box 4832, Frankford Station, Phila- delphia, Pa. a BORNEO, Malay, large U. 8&8. revenue, commemoratives, with 105 other dif- ferent U. S. and foreign stamps for only 9c. Fennell Stamp Co., Dept. M, St. Louis, Mo. 100 FOREIGN Postage Stamps for 4 cents postage, together with handsome stamp wal- let offer and approvals. Lists free. Palmer Stamp Co., 8221 Linwood Ave., Detroit, Mirh 109 DIFFERENT, Zanzibar, etc., 10c Floyd Marsh, apolis, Ind icitieistiaimadaii 110 DIFFERENT Stamps, many unused, high values, free to collectors requesting our Net Approvals. Postage 2 cents. Christ- ensen. Milwaukee. Wis.

, Liberia, ~ Arabia, Azerbaijan, to approval applicants. 524 Hamilton Ave., Indian-

ONE Dollar catalog value free with first purchase of $1.00 net from my popular ap- provals. Better class of stamps for those willing to spend $1.00 or more at a time. References please. A. Bauer, Palmyra, N. J. 500 DIFFERENT, 35c; 350 different. 25c; 200 different, 12c; 500 mixed, 18. Evans, Box 366, Reading, Pa.

Page 232

1,000 ALL different stamps $1.00. rice list of all United States stamps free. 7 _South Dearborn St., NT F a Tomes. | , 69 cents. LIBERIA Snake “‘Priangle and two other triangles in our —— of 53 genuine foreign Crowder Company, 24 VARIETIES: ‘Cuban stamps, List of 6,000 low-priced stamps free. dress Chambers Stamp o COVERTCO Packet, 250 varieties unused and _— stamps 15 cents. C Quaker Stamp Co., Loose Leaf Postage Stamp Album at rate of 8 pages each month given with sub- scription to monthiy Journal. United Stamp Co., “MAGNIC AROCIOUS” Packet fore foreign stamps, beauties from distant lands. colored, unusual designs) free for 2c. Stamp Company, Toronto, C TRIANGLES! 75% discount—Special ap- proval sheets with each 5e packet containing stamp before 1880, Murray Stamp Co., 515A is. PENNY Approvals OUR Latest 20-page U. Stanley Gibbons, r and Canadian FREE 40 Czecho Slovakia Stamps to ap- proval applicants. DIME approvals. Sets—Packets—Singles. Peat Comish, . Schenectady, — - STAMPS, Bargain wa, r “509 DIFFERENT Foreign classy stamps cataloging $10.00 for 19¢; anal Shemp Co., 809 N. W. Bldg., Minne- “eS ° JLD Money Wanted. Will pay $100.00 for 1894 Dime, 8. i 5 Libaty Head Nickel premiums paid for all rare coins. for Large Coin Folder. May mean much rofit to you. . Numismatic Co., x. ~ OLD =Coins s Bought and Sold. Rare Coin tions. Send 1c for Coin "collecting book- ~ GET Profit and Pleasure in collecting Old Send 10c for Large Illustrated Coin Catalogue. You'll be delighted with it. for it right now. v matist, Mehl Bidg., . Largest Rare Coin Firm in the U. 8. UNITED STATES, Large Cent, bronze, three-cent nickel and Bargain List, George Coffin, Greenwood Mountain. Me. _ $500 Each Paid for hundreds of Keep all old money, it Send 10 cents for il- old and odd coins. may be very valuable. lustrated coin value book, 4x6. Guarantece p ‘ices. ~~ 35 DIFFERENT ¢ Coan Bec. (CONFEDERATE Note, White Metal Coin German Bond and catalog, Large Spring a. cata- logue of coins for sale free. 1 William — 101A Tremont Street, POPULAR MECHANICS ADVERTISING 40 OLD coins, all different, $1.00. 25 different coins 50c. 100 different coins $3.00. 200 different coins $5.00. 300 dif- ferent Germany Bills $1.00. Lexington Concord Half-Dollar, uncirculated, $1.10. Claud Denney, Box 315, Dallas, Texas. “CALIFORNIA Gold—Quarter Size, 27c; $% size, 53c; 3c Piece and Catalogue, 10c Norman Shultz, Box 746, Salt Lake, Utah. “ROMAN coin 1600 years old, 25c. Dur- so, 25 Mulberry, New York City. = WANTED, Old Money. 8 Coins 25¢; list free. Brooks, 2725% Live Oak, Dal- las, Texas. 50,000 RARE coins, medals, free. Collectors Exchange, ton, Philadelphia. FOR BOYS INTERESTED in Science? ence club in your town. Conduct experi- ments, field trips, etc. Instruction book- let, club plans, membership blanks, sam- ple magazine 25c coin. Scientific Clubs America, McComb, Miss DRAFTING. Learn Mechanical Drawing. Big demand for men. Pocket size. Start at beginning and learn by a series of sim- ple lessons. Send no money. Just write postal for “‘Practical Course in Mechanical Drawing.’’ Pay postman postage and $1. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, TM BOYS, make ‘Wonder’ gun, strong shooter, 36” long. Fun aplenty. Easy in- structions 35c. Box 4185, Tampa, Florida. TWENTIETH h. electric motors. Fine for fans or experimenting Runs off dry cells or radio Setters. Finest workman- ship. $2.25 each, postage prepaid. Send eash or money order, A. Redmond Co, Flint, Mich. =. ‘SHALL I Become an Engineer? You can decide this all-important question better by reading a book called ‘“‘Engineering as a Career,”’ written by a group of eminent en- gineers. It costs only $1.00. You will find the advice of these successful men to be of the greatest value. Pay postman price and postage when he hands you the package. Address Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ill. BOYS—Machined parts for electric Write for particulars. wg “Specialty Co., Box bills; lists 1536 Willing- Form sci- motor Hudson Val- 642, Poughkeepsie, ‘FILMS 1 for Toy Machines. 200 feet $1.50 Postpaid. Dixie Film Co., Box 2042, Mem- , ia" aca arene Pee FUN Making Things. Four large pro- fusely illustrated books telling how to make almost everything from a sail boat to a toy automobile propelled by a motorcycle engine. Now $2 per book or $7 for the four if or- dered at once. Send no money. Just write a postal saying, ‘‘Send the Boy Mechanic Library.”’’ ay postman $7 and postage. For single books, specify either Book 1, Book Book 3, or Book 4. Popular Mechanics | t_. Room 906, 200 E. Ontario St., Chi- cago, Ill CAMERAS AND PHOTO SUPPLIES PHOTOGRAPHIC equipment and acres- sorles of every description are listed and illustrated in our 228-page catalog. It will pay you to secure a copy which is is- sued free, as our prices are low. We also deal in used goods which are sold under the same guarantee as new goods. Ask for our Bargain Book. Central Camera Co., _ E118, 112 S. Wabash Ave., Chicago, DAKE iam money in Photography. __ quickly at home. Spare or full time. New plan. Nothing like it. Experience unnec- essary. American School of Photography, Dept. 3432, 3601 Michigan Ave., Chicago. KODAK Film—Special Trial Offer—Your next roll developed 5c, prints 3c each. Beau- tiful 6x10 mounted Enlargement 40c. Same- Gay Service. Fleet Photo Service, 825 G St., V.. Washington, D. C PaaS START a Home Travel Club. See in- teresting places in and out of United States without expense and discomfort of Learn traveling. Ask particulars today. The Kenneth Sales Co., Dept. C., Box 893, Poughkeepsie, = BIG Money Saved on Photographic Lenses and Apparatus—goods exchanged; repairing done. Ralph “, Golsen, 1128 Argyle St., Chicago. Dept. FILMS Besdleced Special Trial Offer. Any Size Kodak film developed 5c, prints 3c each. Trial 6x10 Enlargement in handsome folder 40c. Overnight Service. Roanoke a Finishing Co., 209 Bell Ave., Roan- oke, Va, SECTION HAVE You a Camera? sample of our big magazine, to make better pictures and American Photography, Boston. 17, Mass. Cameras, F4.5 lens, $22.50. St., Los Angeles, AMATEUR Cs Booklet describi One Hundred Best Magazine Markets” 10c. Snyder Publish- ing Co., Guilford, Conn. FOR “$i. 00 we develop your Film Free: make one dozen Postal Card prints from best negatives. Old Masters Studio, s°,- tion V, Cincinnati, Ohio. ~ PHOTOGRAPH from unpublished | nega- tive Abraham Lincoln $1. ssler, East_Orange, N. J. MOTION PICTURES $$$ 1250 FOR a Photoplay Story by an unknown writer A. sold through our Sales Dept. We revise, copyright and market Write for Free showing how earn mo; 116 Camera Hose Bargains—2 Barttro, Calif. 4x3y 6436 Hote} P rofitable Located in the heart of Motion Picture Industry, we know the demand. Estab. 1917. Send Msg. for free criticism. Book- let on request. Universal Scenario Com- ny, 206 Wes tern and Santa Monica Bidg., Hollywood, Calif. FILMS: $3.00 per reel up. Comedy, Western, Cartoon, Drama, Serial, Edura- tional, Special Features. Best Movie Stars Free List. Toy Film 200 Feet Postpaid $1.59. Dixie Film Co., Box 2042, Memphis, Tenn. ~NEW and Rebuilt Projectors for Theaters, Schools, Churches, Traveling Shows. Sup- plies and Theater Equipments. Bargain Prices. Monarch Theatre Supply Co., Me Tenn “FOR Sale: Motion Picture Films, $5.00 per reel and up. Short lengths for toy machines, %c per foot in lots of $2.00 worth or more. Progress Pictures, 3220 Lindell, St. Louis, Mo. SEND $2.00 for startling new Cinemeter Gives exact exposure for all Movie Cam- eras or lenses. Fits pocket. Free Bargain List of Motion Cameras. Bass Camera Com- peng. 109 North Dearborn Street, Chicago NEW 100-foot spring motor camera, $100; 16%4-foot spring motor camera, $37.50. East- man negative film 3 cents foot. Motor drivers suitcase. Projector $50. Movie printer, $25 50-foot developing outfit, $200. Films, $2 reel. 5 Madza lamps, 25 volts, 3 amperes, $5.00. Ray, 296, 5th Ave., D New 2 = CARTOON Movie Film, fifty feet. one dollar. List. Alton Films, 205 Brush Creek. Kansas City, Mo. : FILMS and Machines, dirt cheap. Stamp for lists. Box No. 5836, Westport Station, Kansas City, Mo. WESTERNS, features, $2.00-$3.00 per reel. Stewart "Marshall, Rome, Ga. if 1000 FEET of Comedy, $2.00. No lists Sunset Film pean, 298 Turk St., San Francisco, Cali SCENERY TO RENT Bi gaye hn Most Beautiful Settings for ras, plays, minstrels. Amelia Grain, Philadelphis EDUCATIONAL AND INSTRUCTION YOU can have a business profession of your own and earn big income in service fees. A new system of foot correction; readily learned by anyone at home in 4 few weeks. Easy terms for training; open- ings everywhere with all the trade you can attend to. No capital required or goods to buy, no agency or soliciting. Address Stephenson Laboratory, 1 Back Bay, Bos- ton, Mass. _ STORY Ideas Wanted for photop! magazines. Big demand. Accepted y form for revision, development and sul- mission to markets. Estab. 1917. Send manuscripts for free criticism Book let mailed on _ request. Universal Scenario Company, 403 Western and Santa Monica Bldg., Hollywood, Calif. WORLD-ROMIC System, Masterkey 5.0” languages. Primers, $1.98: Arabic, Chi- French, German, Italian, ———. Russian, Spanish. La 15 W. 18th YOU Need a better grip on mathems'! Tell us to me you a copy of **Mathematics for the Practical Man,”’ only $1.50. By common sense methods it removes the mystery and difficulties so algebra and calculus are made simple. Assuming your knowledge 1s limited to arithmetic you quickly and easily gain a working knowledge of algebra, Fn 3 etry, trigonometry end calculus. mply pay postman when he hands you the ~~ age. Address Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, IL

Page 233

le sh- 5100; Rast- ivers $25 . $2 eres, ; one srush tamp ition,

POPULAR Yor an now secure a full correspond- - ool course and complete training it ‘ business or technical subject for or $10; complete course in business, traf! law, banking, accounting, sales- ma p, drafting, electrical work, railroad mining, auto work, etc. Send - plete list of subjects and free, full information. _American Vocational School, Lewisburg, W. Va.

FAMOUS Bailey Handbook—The book that prepares you to pass the examination for grade of license for stationery, ma- rine and Diesel engineers, firemen and boiler inspector in any state of the union or any pr e of Canada, Flexible cover. Handy pocket size. Pay postman $2.00 plus the postage when he hands you the package. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Til. $1,000'S IN Prizes! Particulars of about 1) Contests monthly. Articles and help- ful hints by winners. Copies Contest News and our comic White Mule magazine 0c value) only I%c in_ coin, Fin-Ko Pub. Co., D-12, Toledo, Ohio. LEARN Bookkeeping in Ten Lessons. Shelby course is brief, concise, complete. Makes bookkeeping easily understood. Price $5 Write for particulars. Shelby Publishing Co., 605 Cotton Exchange Bidg., Memphis, Tenn. MACHINE Shop Mathematics ) without attending School: Simple as A, B, C. How to figure Blue Prints, Feeds, Speeds, Piece Rates, Trigonometry, Ete., many daily Problems and Solutions. Complete $1.00. Machine Shop Math, Sales Co., sa7 N. Avers Ave., Chicago, Ill.

DIESEL Engines—Marine, locomotive, sta- tionar Growing importance of the Diesel engine cannot be overestimated. This new book should be in the hands of every student f mechanical engineering. 500 pages, 280 illus. Pay postman $5 and postage when he delivers book Popular Mechanics Press, RK 906, 200 E. Ontario St., Chicago. FIREMEN, Brakemen, Baggagemen (white or colored), sleeping car, train por- ters (colored), $150-$250 monthly. Expe- rience unnecessary. 810 Railway Bureau, East St. Louis, Ill. 8 KEYS (Copyrighted) master double entry bookkeeping, easily, quickly, thor- oughly Guaranteed. International Book- keeping Institute, Springfield, Mo. LEARN Auctioneering at Home. 5 Les- sons Free American Auction College, Kansas City, Mo. CARTOONING and Commercial Art. 25 lessons, 300 illustrations, 2 clothbound vol- es and drawing kag $5 postpaid. Cat- g Free Nu-Way Art School, 220-B Graham _Ave., Brooklyn, N.Y. BE a _Laboratory Expert. $300 to $500 Monthly. Stady Microbiology Sanitation. Day, Evening classes, Di- plomas, Degrees Granted Tl-piece outfit Free to students. Write for our Free Pros- pectus To-Day. International College of — rcs 2517 N. 76th Ave., Chicago,

Earn from USED educational matter. Lowest prices; erms Catalog free. Mention Subject. Fred Goetz, 440-A Sansome, San Francisco. USED educational matter sold on re- purchase basis. Also rented and ex- changed Money-back guarantee. Catalog free. (Books, etc. bought.) Lee Mountain, Pisgah, Ala. _ " CARTOONING—Complete course. Un- usually low price. Particulars on request. Carlson Cartoon Service, Dept. M, 116 West 39th Street, New York. AMATEUR Cartoonists: Make money in spare time with new cartoon selling plan. Write Smith’s Service, PM1194, Wenat- cee: Wash . NSTRUC TION bool books, a all_k kinds. ¢ Cata- neue free. Wineholt Book Co., Woodbine, venna. EARN $25 weekly, spare time, writing for newspapers, magazines. Experience un- hecessary. Details Free. Press Syndicate, $8). St. Louis, Mo. CARPENTERS Ideas for those who like fo tinker with tools, and for professional carpenter. 40 articles on saw and sawing, 17 on benches and bench equipment, 22 on doors and door hanging, 18 on lumber, 13 on mitering, 74 on tools, 22 on shop equip- ment, and many others—°366 in all, and 2 illustrations. Send No Money. Just ‘rite a postal. Pay postman postage and $1.50. Popular Mechanics Press, Room $06, 200 E. Ontario St., Chicago, Iil.

MECHANICS ADVERTISING SECTION 53 RADIO OUTFITS AND SUPPLIES TRADE Radio receiving parts (must be new condition, latest models), you cannot use for new parts you can use. Parts only, no sets. Catalog and over two pounds cir- cuits, etc., prepaid, 25c. Radio Exchange, Kent, Ohio. (Established 1921). RADIO Cabinets: Limited stock of slightly defective phonograph cabinets; mahogany finish and quartered oak; for- merly retailed at $35.00; will close at $5.00 each. May be changed readily to first-class Radio Cabinet accommodating panel about 8x15. Lower compartment ag Lundstrom Mfg. Co., Little Falls, RADIO Receiver; All stations—American and overseas; all wave lengths—200 to 4,000 meters. This 6 tube Gnome Polyphase, the latest development in modern radio. Agents wanted. 100% . fy week easy. Radio Exchange, 925 Broadway, New York. RADIO Up-to-the-Minute. Telegraphy, radio reception, vacuum tubes, telephony, how to build receivers, broadcasting, all treated in new book. Send no money. Pay postman $1.25 and postage. Just write postal for “Radio Up-to-the-Minute.”” Popular Me- chanics Press, Room 906, 200 E. Ontario St., Chicago, — Mil. ~300-MILE “Pocket” Radio, $2.00. No Tubes nor Batteries required. Useful and practical, loudspeaker volume. Order direct today. Spencer Laboratories, 116 Atlas, Akron. Ohio. _—" ELIMINATOR chokes, 30H, 85M.A., $2.75 postpaid. We estimate on kits and parts; send your material list. Radio Parts Sales Co., Orange, N. J.

GROUND Troubles Ended. _ Silver Streak Ground Rod, $1.00 Postpaid. Cooper-Cheney Radio Shoppe, Lima, Mont. BIG money building 5-tube Radios, In- structions 40c. Complete Kit $13. B. C. Biggs, University Place, Nebr. CATALOG listing Radio Supplies on re- quest. Arthur Dombrowski, 4341 So. Campbell - Av., Chicago, Til. BUILD your own trickle charger, costs less than $2.00 Instructions and diagrams 25c. <A. C. Fernekes, 117 Culver Parkway, Rochester, N. Y. RADIOS, 5-tube assembled $29.50; kits $18.50. J. L. Daltovich, 4910 Grasselli, East Chicago, Ind. BEST Radio Book—New Third Edition, 1927, Revised—Radio Theory and Operating by M. T. Loomis of the Loomis Radio Col- lege is America’s Standard Radio Text-Book. Used by the various gov’t depts. and schools and leading radio schools. 885 pages, 700 illus., flexible krafty leather binding. Sent Cc. 0. D. Pay postman $3.50 and the post- age when package is delivered. Popular Me- chanics Press, Room 906, 200 E. Ontario St., Chicago. TRADE AND TECHNICAL SCHOOLS LEARN Bricklaying and earn $1 to $1.75 an hour. Wm. M. Woods, who has trained 500 men will teach you bricklaying in our school run by 800 builders interested in giving jobs to Mr. Woods’ students. Tui- tion $60.00 per month. Time required 3 to 6 months Board and room $8.00 to $10.00. Work is actual bricklaying: you become master in the craft, in line for highest wages and promotion. Ample space and material Catalog free. Associated Building Employers, N-400, A. B. E. Bldg., Grand Rapids, Mich. _

AUTO industry wants National-trained men Salaries $50 to $200 weekly. Na- tional has helped 16,000 inexperienced men to big pay Earn while you learn in Los Angeles. Million dollar shops Write for free book National Automo- tive School, 4006, Dept. 30, Figueroa, Los Angeles. _ HERE At Last—A_ real Home Study course in Decorating, Sign Painting, Show Card Writing, Graining and Marbling— taught by Moving Pictures We give you a Moving Picture Machine with the course. Write for full particulars: WNa- tional Paint & Decorating Assn. School, 435 N. Clark St., Chicago, Tl. GET a Foreman’s job in any trade. You will earn more money. Become an expert Blue Print Reader. You can do it in spare time. My training will advance you quick- ly. Write now—tell me what trade you want—I will send my plan at once. Car- roll Rumsey, 265 Drexel Building, Phila-

delphia, Penna.

TELEGRAPHY—Both Morse and Wire- less—taught thoroughly and quickly. Tre- mendous demand. Big salaries. Wonder- ful opportunities. Expenses low; chance to earn part. School established fifty years. Catalog free. Dodge's Institute, Fern St., Valparaiso, Ind. Aaa “TRAIN for big pay pay electrical jobs on half million dollar equipment. Earn while you learn. Learn right. Low rates Write for free book. National Electrical School, 4006, Dept. 40, Figueroa, Los An- geles — LEARN barbering at home. Practice on the family. Complete barber college instructions, home study, for $1 bill or money order. Foster, Expert Barber, 6128 Michigan Blvd., Chicago, IIL BUSINESS OPPORTUNITIES

NOTHING on earth offers bigger opportu- nity for building wonderful business this sum- mer than manufacturing these popular profit- able, big-selling specialties. Start small— watch business grow. Write today for val- uable formula literature relative to making: Sealatite, guaranteed puncture proof liquid; Ducopol, automobile polish; Cellulac, Duco finishes in color, quick drying; Solvit; pow- dered hand cleaner; Miracle, non-thermic ice cloths, mendit, fabric patching liquid; Liqui- Seal, radiator cement; Vanil-Ozone, ‘‘mil- lion-dollar’’ vanilla flavor; Fruitina; con- centrated summer drinks; and a hundred othet real honest-to-goodness, money-making prop- ositions. 30 years headquarters for best formula service. Miller, Chemist, 1706-B Jetton, Tampa, Fla.

A GOLD mine of information for only $1.00. Strongest man cannot lift you— secret 50c. To soher up instantly—great for those who over-drink, 50c. Guessing anyone's weight—circus stunt—never fails, 50e. Liquor remedy—stop drinking, 50c. Tearing telephone book in two—giant strength, 50c, Have a grip of steel— Shake till it hurts, 50c Five celebrated anti-tobacco formulas, 50c. Calling heads or tails every time, 5%c. All above secrets and 27 others for only $1.00. American ae Co., Postoffice Box 1278, San Fran- cisco. READ The Mail Order News—America’s Pioneer Mail Trade Journa!. Quarter Cen- tury Old. Approximately 600 Pages yearly of valuable information for beginners an

established mail-order houses. Analyzes maii-order business, its opportunities. Practicable mail-order ideas, legitimate money-making schemes, instructive articles. Tells how to start, what to sell. Published monthly. Subscription $3.00 yearly, Send 25c for sample copy. None free. Mail Order News, 360 Bristol Bidg., New York. ARTIFICIAL marble sanitary flooring in- structions, covering wood or cement ing 14 inch thick, fireproof, waterproof, all colors, low cost, Ornamental casting, con- crete, plaster, papier-mache decorations, garden furniture, statuary, flexible molds. 17 years instructing the public; particulars and illustrations free. Chris. Mahler, Huntington, N. Y ENTER a new business. Earn $3,000 to $6,000 yearly in professional fees making and fitting a foot specialty, openings every- where with all the trade you can attend to; easily learned by anyone at home in a few weeks, at small expense; no further capital required, no goods to buy, job hunt- ing, solociting or agency Address Stephen- = Laboratories, (1) Back Bay, Boston, Mass GOLD, Silver and colored sign letters for windows, sign boards, trucks, automobiles Make them yourself with our instructions and letter patterns. Fast sellers, big profits all or part time. No experience required. Field unlimited. Collect two profits, making and selling. Stamp brings actual sample and complete description. Enterprise Systems,

646 North Michigan, Chicago PATENTS. Time counts in applying for patents. Don’t risk delay in protecting your ideas. Send sketch or model for in- struction or write for free bock ‘‘How to Obtain a Patent’ and “Record of Inven- tion’’ form. No charge for information on how to proceed Communications strictly confidential. Prompt, careful, efficient serv- ice. Clarence O. O’Brien, Registered Pat- ent Attorney, Security Bank Building (di- rectly across street from Patent Office), Washington. D. C._ See pages 140 and 141 GET into the mail order business. Un limited opportunities for ambitious per- sons. Write today for our big “‘free’’ offer. Publisher, 6652-J Gravois, St Louis, Mo.

Page 234

54 POPULAR MECHANICS ADVERTISING SECTION PATENTS Procured; Trade Marks Regis- ANYONE handy with paint brush can “INSIDE” mail order information and tered—A Comprehensive, experienced, prompt earn five thousand dollars or more yearly sources of supply 25c. Wholefield Co; — ag fo a -- Re oe of ee, eS — plastic | Akron, Ohio — your eas. reliminary advice gladly fur- paint o many shades anc textures. TASTE - nished without charge. Booklet of informa- Waltex is installed in homes or build- Blain Fem. shies eae — tion and form for disclosing idea free on | ings where beautiful appearances are de- samples; other unique method, ‘—~ , request. Richard B. Owen, 30-Owen Bidg., | sirable. Sells on sight. Get full par- | Parker, New Brunswick, } o. & Washington, D. C., or 41-R Park Row, | ticulars. Everlastone Products Corp., | ——geLp t Mail! Bool New York. Everlastone Square, Baltimore, Md. Li — coon ail! Books, novelties Ls ars ‘ naa, painters, carpenters, start — A i order ee 33-Elfeo, 525 South Dearborn, Chicago urniture refinishing, ainting, handyman yhat have you yhitmore, 730 Wash- shop on nearly nothing ; winning plan | ington St., Denver, Colo. wy Ay Met ied read all these offers, brings customers quickly John Braceland, RESPONSIBLE r _ ed = ) a or detailec information. (None 1439 So. Ninth, Philadelphia, Pa. Né 4 manufacturer wants ree). ow’ * and * “What” to sell by 1ail: - FREE ~ ms - —— : Woodbine. Penns. FO or, printing photos aa mail-order information. Make neckwear $1.00. Gregg Novelty Co, big money, spare time, managing own rn ARTERS: Deleware: | best, + nee: East 65th Place, Chicago, TL business. J.P. eur. 1109 Manhattan | ington. Del. ae oe SUCCEED Making Your Own ve., Brooklyn, } = Bb Ee ] TOMBSTONE Cleaning; lonesome work, OPERATE money-making mail-order Ar men. “> special elscstars but dollars jingle. See under Classifica- | Dusiness in spare time. Write for free | p B. Thaxly Co., Washington, D. € tion (Formulas). particulars. Triangle Mail Order Service, FORMULAS: Absolutel eed PAINT Manufactured for less than 50c 600 Blue Island Ave., R31, Chicago. ounian LAB: Aheawanaty, — Don't per gallon. No machinery required. Free I AUTO Gas Saver Free, To introduce. your money till you've investigated Literature. Illinois Business Service, Chi- All makes. Amazing mileage increase. wonderful processes for all lines. Get my cago. Critchlow, C3-805, Wheaton, Tl. valuable ‘‘eye-opening’’ literature. Highest “FLEXIBLE Glass Substitute—make it | MAIL Order Information, where to buy | references. 30 years supplying th yourself. Big demand. Enormous profits nn ——— yg ——- Miller. Chemist, 1706-P Jetton, Tampa, F! Sample with instructions for making and everything for mall order business <vc. i selling, $1. Flexlite, 3935 Tracy, Kan- | Harvey _Teeple, Decatur. Ind. ‘ 10.000 FORMULAS. A real gol a mt sas City, Mo. FREE Mail Order information. Write Tan ovine aie te an. FRED “Manufacturer's Bulletin” de- today enclosing game. Mason, 3900 Broad- maké and sell cosmetics, mucilage scribes clever new products you can make | Way. Room 5, Chicago. _______________ ] freeze solutions, battery solutions, beveras and sell. Toys, Novelties, Fancy and | MAKE Toys, novelties, furniture; com- | cheese, chewing gum, cleaning preparat Molded Goods, Accessories, Foods, Bever- plete outfit, $1.00. William Bogren, 2264 extracts, hair preparations, inks, b Preparations, etc. Commercial Meth- Hermany Ave., New York. leather polish, mirrors, perfumes, p Manufacturer’s Bureau, R37, 1129 | - ALL-METAL Screen frames made without typewriter ribbons, carbon paper, wa East 31st, Kansas City, Mo. ___s«éd:s«Tfackss, Nails, or Screws. Hinged or Sliding. powders, liquid soap, and hundreds of _ THERE'S , Money in Dirt! Read the ad 4 corners 50c. Strips 10c foot. A _ Profit- profitable articles. Send no money on page 12 able business anywhere. Diamond Hdw. write a postal for “‘Henley’s 20th * WASH *ellars from Dirt! A new ma- | Mfg. Co.. Fourth Ave.. Pittsburgh, Pa. Book of Formulas.” Pay postman p

chine protected with patents (pending). DELAWARE Incorporator. Charters; Fees and $4. Popular Mechanics Press, Ro: Make $15 a day in your city. Read page | Small; forms. Chas. G. Guyer, 901 Orange | 200 E. Ontario St., Chicago, Til. 129 and then write quick. St.. Wilmington ae 15.000 FORMULAS in “ Scientific Amer- “A BUSINESS in your own city. No CHEMICAL Expert will furnish Formulas ican Cyclopedia of Fomulas.”” Includes fol- competition and a contract to protect ex- and Trade Secrets. All lines. Lists Free. lowing and many others: Accidents and « clusive territory. Valuable franchise open. W. L. Cummings, Ph. D., 228 Gordon Ave., gencies, agriculture, alloys and amaly Read page 129. 000 Syracuse. N.Y. artist’s materiais, beverages, cements YOU can have an independent busi- LEARN the collection business. Good in- pastes, mucilages, bleaching, renovating ness of your own, and I am here to show quick results. Interesting booklet, oring metals, dyeing, glass, heat trea you the way. Write at once! Wm. E. | “skillful Collecting” free. National Collec- | °f metals, household formulas, ice Heinemann, 2415 Montrose Ave., Chicago, tors Assn., Long St., Newark, Ohio confectionery, chewing gum, lapidary In. . —— exterminating vermin, lubricants, | EARN $10 daily silvering mirrors, plat- varnishes, photography, condiments, MAK®E your own gasoline saver. Mate- ing and refinishing metalware, autos, chan- formulas, rubber, soap, candles, sold rials cost 5 cents. Instructions 50 cents. | deliers, bedsteads, headlights. Outfits fur- | toilet preparations, perfumes, waterpr Severance Service, 12310 Taft Ave., Cleve- nished. FE. Decie Laboratories, 1133 Broad- fireproofing, writing materials. Ser land, Ohio. way, New York. __ ences money. Just write a postal. When p MAKE big money opening Safe and MAIL Order offers unlimited opportuni- | hands you book pay $5.50 and postal ct Setting Combinations. Wayne Strong, ties. Get free offer today. Messenger, Dept. Popular Mechanics Press, Room 9 3706% Lan Franco St., Los Angeles. 62, Stiliwater, N. Y. E. Ontario St., Chicago, Il.

Page 235

infor- mulas Book send Men, Amer es fol le glue g ] er 1

POPULAR 00 \RMULAS including _Luminous Paint— fon vewing Dry Batteries—Resilvering

r sas Tonic, Puncture Plugger, 25c. Mir. Free. Ideal Book Shop, ‘Park Ridge. \NY Formula, 20c. ‘‘Hawkins,”” 215 Lasani Colorado Springs, Colo. TWENTY Money Making Methods. Bruce Hudson, Clarks Green, Pa. AGENTS WANTED 3. Write

| WANT a partner-agent to take care of my business in your town. 1 furnish everything, ine luding world’s finest line of i7= household products and I split the gelling price with you 50-50. Beautiful sample outfit makes selling easy; food household necessities; things products; le eat: highest quality—lowest price

4 sales—permanent repeat iness ; 00.00 bond guarantees quality. I pay largest commissions—give Chrysler closed car 4 ides, Get my amazing offer for your locality quick. Write or wire C. W. Van- DeMark, Vice Pres. Health-O Products Cc ¥ 101F Health-O Bidg., 117 Duane St., Cincinnati, O. SOFT Drinks in Powder—Orange, cherry, strawberry, etc. Makes best drink you ever tasted. Just add cold water and sugar. Re- liable people wanted to place our drink pow- ders in stores and appoint agents. Big orofits to stores—you make 80c to $3.00 profit on each sale. Retails 10c package, makes 10 big glasses. Very attractive advertising nearly everyone buys. Repeat sales Also larger packages for those who yt 85c clear profit on each dollar at 5c glass. Particulars free, or send lve for 10 glass package; 50c for seven pack- ages, all kinds (70 glasses). postpaid. Chas. E. Morrissey Company, 4417 Madison 8t., Chicago AGENTS—$13.80 Daily in advance, In- troducing New Insured Hosiery = men,

women, children. Must wear or replaced free. 57 styles, 39 colors, including Platest “Silk to the Top’ Ladies’ Hose. Nyland made $595 in one month. Edwards, $460.60. Mrs. Bone, $425.45. Why not you? Even spare time should pay you $3.00 an hour. No experience needed. We furnish samples. Silk hose for your own use free. New Plan. No matter what you are now doing, write quick. Macochee Company, Road 2566, Cincin- nati, Ohio EXPERIENCE Unnecessary, remarkable discovery removes drudgery from polishing table silver, auto trimmings, all metal- ware, furniture. Abolishes sticky pastes, messy liquids and powders. Startling demonstrations make sales __ self-closing. Up to 233% B. Lightning 1773 Greenleaf Ave., Chicago, Low price; quick cash gain. profit. Test samples free. E. c rporation,

AGENTS, Salesmen, Crewmen—You'll have the Devil’s- -own- -time finding a better seller than ‘“‘Zippo.”’ Splendid profit on snappy 50c ‘*‘Go-Getter’’ repeat article that sells on a ten-second demonstration. Works while you watch it! Demonstrates value while others waste time making claims New development! Greatest seientifie triumph of the age! It’s the berries! Write immediately for complete Position I Karam-Smith Company, 606 Bozan Street, Fort Wayne, Ind. AG ENTS make $40 to $80 weekly selling yrewriters re- -manufactured like new by the “Young Process.’ Lowest prices and easiest terms ever offered. Big commis- sion—no investment—real opportunity te start in business for yourself. Write today. Young Typewriter Co., "¥ 7106,

64 W. Randolph St., Chicago, 10% PROF IT. Every home buys “The jome Patrol’’ Burglar Alarm. Auto- matically sounds alarm and locks window. Age coining money. Particulars free. T ~ > Mfg. Co., cago JUST Out—Patented Apron. No strings or straps; on or off instantly; $20 a day easy; every demonstration a sale; over A0i)¢ profit; commissions daily; write today for free offer. Staput Co, ='6. St. Louis, Mo MEN—Women—Earn $25 your spare time. 32 No. Jefferson St., Chi-

week during Wonderful plan sells ' out of 10. Experience unnecessary. C. Laboratories, 1223 Wabash, Chicago. _ AGENTS, portraits, photo-pillow tops, frames, sheet pictures, medallions, photo- jewel ‘wy, guaranteed hose, laundry tablets, food products, toilet requisites, luminous rucifixes. Catalog 50 specialties free. 30 days’ credit. Jas. C. Bailey, Dept. C-6, Chicage,

MECHANICS ADVERTISING AGENTS—Can make $250 weekly follow- ing our proven successful selling plan. An article you will never want to change from _ selling. Strictly first class every respect; just exactly right price to make big worthwhile money selling; over 75,000 sold in Philadelphia. Real $250 weekly proposition appointing sub agents, agen- cies, individual sales. Fagley & Halpen, Desk 40, Philadelphia, Pa. AGENTS—Best seller: Jem "Rubber “Re- pair for tires and tubes; supersedes vul- canization at a saving of over 800 per cent.; put it on cold, it vulcanizes itself in two minutes, and is guaranteed to last the life of the tire or tube; sells to every auto owner and accessory dealer. For particulars how to make big money and tree sample, address Amazon Rubber Co., Philadelphia, Pa., Dept. 505. SALESMEN—A _iive-selling Novelty— also suitable for advertising premium, priced under all competition. Guaranteed for life. $1.00 brings samples on our refund plan. Crawford, 2346 N. — St., Chicago, ‘ $18 TO $25 daily. Biggest tins line of 2-piece suits, $9.95 and $12.50; 3- piece wool suit, $17.95 (regular $28.00 value), All-wool overcoat, $18.50. Splendid raincoats, slickers and boys’ suits. Big- gest commissions. Free outfit. Foster, Inc., Dept. 90, 2250 8. Spaulding Ave., Chicago, IL AGENTS Wanted for fast.

easy seller—

Marvel pipe cleaner; literature free. Gomtek Products, 400 West 23rd, New or “AGENTS, Whirlie Gigs. Hot novelty for automobiles. Sample fifty cents. Service Oil Company, Sterling, Tl $40.00 SUITS for $23.50! All Union made of finest quality Vir- gin Wool. You don’t have to know any- thing about selling clothing. We guar- antee your success if you are honest and willing to work. Write at once. Wil- liam C. Bartlett, 850 Adams, Dept. 178, Chicago. WOULD $100.00 Per Week Interest you? Millions of photos all over the country just crying to be made into beautiful, artistic medallions. We have new plan. Lowest prices. Speedy service. — rienced agents losing money every they , put off writing us. Art Medallion Co., Department 27, Corner Campbell and Jackson, Chicago, Ill. THE Magic Billi Fold—A Wonderful Seller. Sample 25c. Elson’s, 81 Heck- man St., Phillipsburg, N. J. AGENTS, $17.50 daily. Auto furnished. Introduce finest hosiery. Seven months’ guarantee. New selling plan gets business fast. No experience needed. Write for Samples. Betterknit Textile Co., Silk 231, Greenfield, Ohio. YOU Can Make Good Durable Paint and Varnish 49¢ per gallon. Write Dept. 2, a Bros. Mfg. Co., Indianapolis, nd.

Bonus besides. BUSINESS Guide with free legal serv- ice sells everywhere. Wells cleared $1,185 in 35 days. Write for free outfit. Nichols Co., Naperville, Ill., Box 6. DON’T sell for others. Employ agents yourself. Make you own products. Toilet articles, household specialties, ete. 500% profit. We furnish everything and show you how. Valuable booklet free. Write at once. National Scientific Laboratories, 1970W_ Broad, Richmond, Va. 1 AUTO Gas Saver Free. To introduce. All makes. Amazing mileage increase. Critchlow, C5-805, Wheaton, IIL AGENTS—Sell car owners—Any make, new auto spring oiler. Increases riding comfort—tire mileage, prevents spring breakage. Attached instantly. Nothing like it. Large commissions. Protected territory Write Dept. D, Liberty Auto Supply _Co., Pomona, Calif. DIFFERENT selling plan: low prices and quality gets the business. 100% profit. Over 100 fast selling brushes, dust mops and household necessities State age and = experience. Kautenberg Co., Box FP, Freeport, Ill. $25 DAILY

showing $2.98 slickers.

$1.25 gift to customer makes sales easy. Outfit free. American, 724P, Rocsevelt, Chicago. = a, BE Independent. Make, Sell Your own specialties. immense profits. Catalog de- pendable Formulas, special selected agents’ best sellers, free. M. Lustro, 832 East Pershing, Chicago. SECTION 55 100 MORE active men to Introduce Chieftain Guaranteed Tailored Shirts, 3 for $4.95. Latest novelties, colors, Dick- man, Illinois, in 3 — made $589; Sinton, Texas, in 12 days, $219.60; Bend, Iowa, in 16 days, $334. 20. Why not you? No experience or capital needed. We de-

liver and collect, Full working outiit Free. Cincinnati Shirt Company, Lane 1586, Cincinnati, Ohio. AGENTS: Amazing new invention. Self- wringing mop. Simply push button and it’s wrung. Hands never touch water 80,000 sold one city alone. $90 to $135 week easy. Write today for quick selling plan. Sample furnished. National Prod- ucts Company, Plan 831, Dayton, Ohio. AGENTS—$100 a week for full time; $25 to $50 spare time. Equipment and car free. Exclusive territory. Sound, per- manent proposition. A rare opportunity, but you must act quickly. Write for par- ticulars today sure. American Products Co., 9208 Monmouth, Cincinnati, O. DISTRICT Managers—Agents: Capable men and women financially able to create and sustain branch office for new low- priced household necessity in big demand. Agents also wanted. For particulars write, Pittsburgh Sanatory Supply, Inc., Wilkensburg, Pa. AGENTS, $260 month. Bonus besides, Introduce finest line guaranteed hosiery you ever saw. 126 styles, colors. New

sales plan a _ wonder. No experience needed No license to pay. Auto fur- nished Credit given. 8S -. time satis- factory Samples furnis Wilknit Hosiery Co,, Dept. 2431, ¢ Greenfield, i, Ohio. AMAZING large cash commissions in- troducing beautiful $3.95 and $4.95 Fit- to-Measure Guaranteed Shoes. Actual samples furnished. Write for your ter- ritory. Style Arch Shoe Co., Dept. R-166, Cincinnati, Ohio. YES you can make $5.00 to $15.00 daily selling our new adjustable waterproof aprons. B. & G. Rubber Co., Dept. 200, Pittsburgh, Pa. ie pe TOMBSTONE Cleaning; lonesome work, but dollars jingle. See under classifica- tion (Formulas). THANCO Vanilla—Bottle Yourself! centrated; add water! Free labels. Whirl- wind selier! 500% profit! Crushes com- petition! Other Moneymakers. Write Thomas Manufacturing Company, Indian- apolis, Ind. i POSITIVELY the finest ecards. Brilliant imported metallic letters. Greater variety of colors. Two sizes. Quick sales, big profits. Repeats. Em- bossed Show Card Co., 9474 Euclid Ave., Cleveland, 0. “NOTHING Sells Like Shoes pes. Every p per- son a prospect. Take orders for Mason Shoes direct from factory 85 stunning styles. Amazingly low prices. No ex- perience needed. Free outfit. Mason Shoe

~ Con-

embossed show

wis Co., Dept. 17-B, Chippewa Falls, is ~NEW Cigar and Cigarette Lighter sells for $1.00 Does work of $20.00 lighters. Your profit 100% in advance. Every lighter guaranteed 10 years, Amazing profit maker. Sale a minute. New Plan. Write for sample offer and details. Mas- terlite Company, Desk 600, 110 East 23 Street, New York City. SPORT Sun Caps, Sun and Auto Gog- gles, Needle Packages, Snappy Comic Post- ecards, Bathing Girls, etc. Samples lie each. Klees Co., 1710 Undercliff Ave., New York. DISTRIBUTORS tS Wanted—* 1927 Sheridan Directory’’ (where to buy half million articles wholesale). Pruitt Sys- tem. Brookfield, Til. $1.35 Pruitt- MONOGRAM Automobiles, $1.35 Profit ten minutes’ work; every owner wants them: millions without ; particulars free. Motorists Accessories Co., Mansfield, Ohio. NEW Dynamo Timer guaranteed life of ear. 12,000,000 prospects. Earn $100 weekly. Write today Free sample. Dynamo Co., waukee, Wis 426-1108 Eleventh St., Mil- MAKE $100 weekly supplying demand for new invention. fakes autos run on 7% — gasoline. Free sample. Write Whirlwind Co., Milwaukee, Wis. a <b ce SIMPLEX Vaporizer 25 to 60% in- creased mileage guaranteed Retails $1. Thirty Days Free trial. Exclusive terri- tory American Fixture Co., 234 West Water, Milwaukee, Wis. 2 FLORAL Mirror, 35¢ Send birth date. 1041-257 Winnebago,

Jabe Studio, Kansas City, Mo.

Page 236

56 POPULAR MECHANICS ADVERTISING SECTION AGENTS: Build a permanently profit- able business on one easily sold item. tlobe Re-Atomizers, a new, patented in- vention has an untouched, ten-million- dollar market awaiting it. Act now and obtain exclusive representation. Send $1.00 for sample and complete informa- tion. References: Chamber of Commerce, R. G. Dun, National City Bank, Brother- hood Bank. Globe Sales & Distributing Co., 101B Spokane St., Seattle, Wash. HOSIERY Free and $12 daily. Sell nationally known Pure _ Silk Hosiery. Amazing values. Experience unnecessary. Free sample outfit mailed immediately. Pure Silk emery Co., 208 W. Monroe, Tr pt. P90, Chicago. AGENTS: Men-Women, big money sell- ing new wonderful silver polish—jewelry cleaner. Easily demonstrated Repeats! Protected territory. 100% ofit. Whole —spare time. Cynox, 1 West 34th, New York, Dept. C. $100 WEEKLY representing to Wearer Company; Necktie and work large Direct Complete * Shirt, clothes line. Unbeat- able combination means selling everyone. Advanced commission and _ bonus. Sales Compelling outfit Free. Howard Shirts, 1213 Van Buren, Dept. M40, Chicago. WOMEN—$2 an hour spare time: 100% commission, new idea sanitary necessity; sells on sight; every woman buys; new feature never before used; designed by physician; revolutionizes oll uncomfortable methods; pay every day; no deliveries, no collections, no experience or capital re- quired. Particulars mailed in plain en- velope. Write Mrs. Mary IF. Coleman, Meriden, Conn. EASY money wearing free my local distributor. gg * Big Profits. Co., Dept. G-942, cinnati, Ohio. FREE Outfit—$10-$15 teed all-wool tailored trousers less than store prices. Quick sales. Big money. Pay daily. Free trousers offer. Hutchins Pants Co., Dept. 160-FC, Cincinnati, Ohio. AGENTS, Either Sex: oposition on earth. ome a buyer. Sells itself. Send 50 cents for sample and full particulars. Earl Ramsey, Firth, Idaho. cae DON’T sell for others. Employ agents yourself. Make your own products. articles, household specialties, etc profit. We furnish everything and you how. Valuable booklet free. Write at once. National Scientific Laboratories, 1970W_Broad, Richmond, Va. _ 1 AUTO Gas Saver Free. To introduce. All makes. Amazing mileage increase. Critchlow, ‘C4- 805, Wheaton, Il. NO Dull Times Selling Food. must eat. Federal distributors make big money; $3,000 yearly and up. No capital or experience needed; guaranteed sales; un- sold goods may be returned. We furnish you with sample case, license and Free Samples for customers—Sure repeat orders. oa territory. Ask now! Federal Pure Food Co.. A2307 Archer, Chicago. _ ~~ $60-$200 A WEEK. Genuine Gold Let- ters for store windows. Easily applied Free samples. Liberal offer to general agents. Metallic Letter Co., 438-B North Clark. Chicago. = es 5 $9.75 for Thousand. GOLD Sign Letters. — Free sample. Catalogue. 1032 B. 55th S8t., Chi- “gsbirts. Be Greatest values ever Fashion Wear Shirt 1220 Jackson St., Cin- daily. Guaran- Biggest 50-cent Every firm and . People Non-Tarnishable. Atlas Sign Works, cago. AUTO owner tire agent wanted each locality to use and take orders for hand- made Mellinger cord and balloon tires; guarantee bond 15,000 miles; shipped pre- paid on approval; get your tires free; no capital or experience required; make $100 to $300 weekly. Write for wholesale prices and sample kit. Address Mellinger Tire Co., Dept. 400, Kansas City, Mo., er Dept. 400, Philadelphia, Pa., or Dept. 400, Oak- land, Calif. Shee MEMBERS of Masonic Fraternity, Knights of Columbus, Shrine lodges, Knights of Pythias, sell new hand-laced $7.00 bill felds for $3.50. proval. 10% discount allowed. ternal Leather Goods Co., P New Haven, Conn. ~ $10 TO $15 a whirlwind seller. 10 cents § (silver). Shreveport, La. ~~ AGENTS—Men, women, big profits selling Veripure Vegetable Soap. Wonderful new soap for toilet, bath, etc. Write today. Ver- ipure Laboratories, Box 999-C, Chicago. Box 1030, day easily made. A Sample and particulars Execello Sales Co., AGENTS: Salesmen—Sell New Thermo- static Automatic Carburetor Control At- tachment for Fords. Big profit, full or part time Increases mileage 50-100% Attached in two minutes. No drilling. Cadillac now using Thermostatic Carbu- retor Control under Blancke license. Sales guaranteed. $15.00 a day Guaranteed to Distributors. Write today. Blancke Auto Device Co., Dept. 805-H-X, 157 E, Erie St., Chicago. SELL slickers, Plaid-lined $2.65, $10.00. Pay daily. free premium. Charleston, Chicago. WILL you wear a pair of genuine tailor-made shoes at my expense? will you show them to your friends and take their orders? I will Also send you Free our big selling Outfit showing 70 shoe styles and 60 actual leather samples. I pay my agents $8.00 daily. Write quick. Tailor-Made Shoe System, 932 Wright- wood, Dept. 294, Chicago. NEW _Invention—400% profit. Quick mend for Hosiery and Stops Runs Every woman buys. Hun dred other fast sellers. J. E. Johnson Co Dept 454, 6145 Wentworth Ave., Chicago WE Pay $50 A Week And Expenses and give Ford Auto to men to introduce poultry and stock compounds. Imperial Co., D23, Parsons, Kan. EVERY Autoist buys Auto Mitten ers. Costs 25c, sells for T5c. given. National Fibre Louis, Mo, AGENTS: daily. No value Bonus weekly. $1.50 Silvertone, 2035AA, Liquid Fabrics. ~ Dust- Sample Broom Co., St. Make $500.00 investment. Rhinestone initial buckles and novelties. Sell easy every- where. Exclusive territory, Chaton Nov- elty Co. 606 Blue Island, Chicago. AGE.. ‘S, maxe $3.00 an orders tor our 4) fascinating Kitchen Specialties. No competition. Write quick. oo Products Co., Dept. 7-K, Newark, monthly. Pay hour taking $10.00 SLICKERS commissions. Represent manufacturer. 10 colors. Free outfit. Roselile Manufactur- 713 Roosevelt Road, Dept. H-3, Chi- cago, - AMAZING 30-day Offer! To prove our Mexican Blu-Flash Gem really matches finest genuine Diamond Side-by-side, we'll mail perfect $5.00 picked sample, alive with rainbow fire, for only $1, log, proof of our claims, and Jewel case proposition. Sells enormous profits! Write quick. Gem Co., Box P-56, Monterey, MIRRORS Resilvered at Home. Costs less 5 cents per square foot; you charge 75 «cents. Immense profits plating auto- parts, reflectors, tableware, stoves, refin- ishing metalware, ete. Outfits furnished. Details Free. Write Sprinkle, Plater, 128, Marion, Ind. eae wae : PORTRAIT Men, largest frame Portrait House on coast. Foreign shipments our specialty—twenty-hour service. Victor Por- trait Co., 2222 Brush, Oakland, Calif. EARN $80.00 weekly with Paris Fashion Frocks for women. Factory prices. Ad- vance commissions. No experience neces- sary. New plan! Fashion Frocks, Dept. D-100, Cincinnati, Ohio. WHY not sell us your spare ¢ time? $2.00 an hour, $19.70 Daily Easy Full Time. Introduce 12 months Guaranteed Hosiery—57 styles, 40 colors for Men, Women, Children, including latest “Silk to the Top’’ Ladies’ Hose. No capital or experience needed We furnish samples. Silk hose for your own use Free. New Plan. M. H. Mathews, Road 5866, Cin- cinnati, Ohio. FOODS always sell. repeaters, ritory. Chicago. ALTA Snubbing Shock Absorber rs. wanted. Six dollars cash. Retailing six- teen. Big money maker. Results satis- factory. Alta Shock Absorber, 900 ©O’Far- rell, San Francisco, Calif. THANCO Vanilla—Battle Concentrated; add water! Whirlwind seller! 500% profit! Crushes competition! Other Moneymakers. Write Thomas Manufacturing Company, Indian- apolis, Ind. GET exclusive territorial sales right for Becklin Quick Adjustable Close Quarter Pipe Wrench. Make substantial reent- age on sales; build permanent business for yourself. Becklin Wrench Company, Seattle, Wash. only $298. Biggest Calif. ~ 100% jrofit. Big new sales plan. Write for ter- Mother Hubbard, 553 Congress, rs. Agents Yourself. Free labels. AGENTS or Live-Wire invention rights to people, + re a new novelty. is , Wash of ae: exam H. Feist, Toutle, Fast Seller; 150% Salesmey home NEW, profit Best- ever Powdered Hand Soap’’; removes ¢ paint, ink, dirt; great repeater : Free, Bestever ‘Prod. Co., Park, Chicago. GET 50 centy from every aut you meet, Amazing new product poured in radiator cleans cooling of three to five pounds rust and s Ends overheating, adds power uaran- teed harmless. Every motorist buys. ale garages. Good for $10 to $20 | Walker & Walker, 81 E. Madison, ¢ SUCCEED Making Your Own P Use our Formulas, Processes. Al) | All lines. Catalog, special circulars {; B. Thaxly Co., Washington, D. ¢ ~ PORTRAIT Agents—Write for new Cat logue—Enlargements, Frames, Medallion Sheet Pictures, Luminous Cru Adam J. Kroll & Co., 2539 So. Sta Chicago, Ill. NEW_ Wonderful Seller, $1.40 yp: every $1.50 sale, monogramming Free samples. Monogram Co., Desk Worcester, Mass. ~ FIBRE Brooms—detachable handles, fine finish. Good profits, repeat sales The Fibre Broom People, 147-C New Jersey Ave., Brooklyn, N.Y. ~AGENTS—Make a dollar an hour new kind of sharpeners. Sharpens a knives and tools quickly. Demonstrating sample free. Premier Mfg. 1 Dept. 68, Detroit, Mich. 50,000. PICTURE Man Friedman canvassing. Beginners can make weekly with my sales talk. men make more. Free book. I Portraits’ explains. Samples Free. ture Man Friedman, Dept. 8-H, Lake, Chicago. _ a PAYING “Position ¢ Open to em... of character. Take orders hosiery direct to wearer. Good | Permanent. Write now. Tanners Mfg. Co., 5-90 C St., Boston, Mass $61.50 WEEKLY, Introducing ar ing a new gas-light burner for | lamps. Beautiful light. No cl No mantle. Samples free. Luther facturing Company, Dept. 596, nati, Ohio AGENTS clean w —. flagsets for decoration day. 571 Harrison, Chicago. “AGENTS Make 200% Profit Sales; 100% selling retailers, 50° jobbers Regulaz and Pleasant m« gums. Fast sellers; permanent Exclusive territory to producers spenpeen, 134-P Mt. Pleasant, ease, Samp 4319-P, Irving roducts 1s Sell autor Write “EW Fifteen Dollars per day New Grass Shear—sells on sight—season just starting. Amazing profits for you All ance Toy & Specialty Co., Alliance, Ohio. DOUBLE Your Income. Read tunity, the Magazine that offers t! of openings to double your income Free. Just send name and addres portunity Magazine, 750 N. Mi Dept. C-2, Chicago. AGENTS, $240 Cppor month. Complet auto § specialties. 100% profit on articie. Territory given. Write qu particulars. American Accessories Plan_ 231, Cincinnati, Ohio. “72 SALES in Four Hours. Profit (Sworn Proof). That's the re “Doc” Barber. Every woman ix 10- second demonstration. Profit 150%. We want 500 ambitious m« women Exclusive protectec = t New self-w~inging mop that rely dry, without wetting hands. No bolts, or screws. Weighs only 2 Simple, Practical, Perfect. Lasts time. Territory going fast! Write Delphos Mop Co., Al@l Tenth & phos, Ohio. AGENTS— Make $100 weekly gelling Seal—automatically, instantly, and nently seals all tire punctures. D¢ tion closes a sale every time. Exclusiv: tory assigned. Brass pressure-¢u! Free with sample can for $1 (enough tire). Money-back guarantee. Gr Products Corp., 200 Rutger St., 5! MO. 75e PROFIT on $1.00 sale. Aut ture and glass cleaner. Your name « Exclusive rights; free sample. Mfg Griswold, Detroit, Mich.

Page 237

POPULAR <TARTLING New Invention for the tawn. Medicine bottle for the lawn and -arden. Turns water to medicine for the ‘awn, yet uses only water. ttach it to Avose, turn on the water, and watch the vowds gather to see what's going on; makes water roll up like @ smoke bank. Gets ‘em all, Takes the place of sprin- Kile rybody» buys. Sells for only $2.00. 4 ike half and more, ll the sands Nothing like it. nd one dollar for agents’ sample. Write for our proposition. Lawn Invention Company, La Crosse, Wise. CASH Paid for Butterflies, Insects. See Sinclair Display Advertisement on page 32. WANT Producing Agents and salesmen? See advertisement. under Advertising Agen- cies, page 49. Frank Lenhoff Adver- Agency, Chicago. : Ae the cat’s meow. Brand new nov- siegest seller on earth. Write to- ; for particulars. Novelties, Box 10, Washington, Ohio. imal JUST Landed. New, imported double- ¥.. safety-razor blades. Retails 50 cents dozen. Big seller and money maker. Write. Suburban, Mt. Washington, Ohio. BIG Money easily made without ped- dling or outfits, Free particulars, Elite, 8 Elizabeth S8t., New_York. RIG Money Monogramming Automobiles. 140 Profit on $1.50 Sale. Particulars i sar free. Evans Products Com- Midian Avenue, Windsor, Conn. $100.00 WEEKLY selling Tooth Whit- ener Display Cards to stores. Fast re- peats. Exclusive territory. Wonder plan assures permanent income. Write quick. Terrell Products Company, Martins Ferry, Ohio AGENTS: delay

ples

It’s a winner. Combined cigarette and match case. Black grain nish leatherette, Holds age cigar- and box matches, Sells on sight. fits. Write for details. All-In- ept. A-6, 2810 Portland Ave, Min- Minn. "MAKE and Sell Your Own Goods’’— Geers neapolis

teed formulas. All kinds. Catalog over Laboratories, Park Ridge, Ill. SALESMEN—Are You Making Enough Money? Let us show you how to make Big Profits with Jiffy Washing Tablets. No experience required. Write for Free Sample and Plans. Jiffy Soap Products Co., Dept. A, Dayton, Ohio. PROFIT: Whirlwind store, office necessity. Fast re- Free sample. Magic Products, 200, 332 East S3ist, Kansas City, free ) selling household peater Room Mo. .EWEST European Novelty Just Out. e article has four uses. Sells less than Over 100% Profit. Write T. Ko- Co., 208 N. Wabash, Chicago. _ Surety, the Original, Geniuine, Hand Soap, and make $5,000 furnish sales plans, advertis- samples. Write quick. Dept. 56, 26 W. Wash- I . Chicago. es SELLING Like Blazes! Eleven piece toilet ds assortment at $2.25 with two carving set free to your customers. profit Davis Products Co., Dept. 1821 Carroll, Chicago. Sa OUR Agents average better than $75 a week; Rich's pure fruit soft drink pow- ders Every home, store, drink dealer buys. Sample Free. Sol FP. Rich Co., 22 S. Sangamon, Chicago. _ cn ail WHY work for small pay? Make $10 to $20 day selling Re Nu Edge Knives— r gie knife that does away with Dull Kniv Barnett Mfg. Co., B3 418 San Pedro, Los Angeles, Calif. AGENTS: Get etails Chicag il FREE ‘Manufacturer’s Bulletin” tells aout salable new products you can make and = sell Gives reliable commercial in- fort r Manufacturer’s R38 1129 § ist $ r

SELL Powder yearly piece Mngt wr We have a whirlwind seller. Webster, 608 Wrightwood,

Bureau, 21st, Kansas City, Mo. _ ,°) PROFIT on $1.50 outfit. Gold trans- ‘er Tonocram; free sample. National Sta- tion D Brooklyn, N. _ SELL Electric Fixtures to every home Owner, complete line, easy sales, no in- Vestment, beautiful catalog, big commis- sions National Tlluminating Company, '<) Broadway, New York City MAN with auto; one day weekly; $35. Bens, Woodside, N. ¥, elie

MECHANICS ADVERTISING MAKE $10 a day without selling. New plan. We send customers to you for greatest gas saver. Cuts gas bills 25%, guaranteed. ives motor more pep and power. Removes carbon. Positively no cold turkey work. We have rfected a plan that sends you buyers as fast as you can handle them. Big money, easy. Write today for complete plan. Mae Auto Products Company, Dept. 506, 6355 Breadway, Chicago. SELL America’s Quality all brass Spark Plug; sample outfit Free; openings for state and county distributors; excellent profits; ae guaranteed; write “‘ASKO,’’ Canton, ARE You Old at Forty? See our adver- tisement on page 74 of this issue. The Electro Thermal Company, 2169 Main 8&t., Steubenville, Ohio. DON’T sell for others. Employ agents yourself. Make your own products. Toilet articles, household specialties, etc. 500% profit We furnish everything and show you how. Valuable booklet free. Write at once. National Scientific Laboratories, 1970W Broad, Richmond, Va. HUNDREDS of manufacturers, formerly agents selling other goods now owe their suc- cess to Miller’s Guaranteed Formulas for making biggest-selling, advertised special- ties in all lines. Investment small. No ma- chinery needed. Profits great. Make your own goods—get the profit you’re entitled to. Write today for my ‘‘eye-opening’’ literature. It’s free and tells all. Miller, Chemist, 1706-W Jetton, Tampa, Fla.

AGENTS—To Sell the New Featherweight All Purpose Waterproof Coat. Weight only 26 ounces, latest styles and colors. Men’s $4.98, Women’s $3.98. Liberal commissions. Write today for sales plan. Featherweight Coat Company, 5719 Euclid Ave., Cleveland, Ohio. AGENTS—Radio product; unlimited poe. sibilities! Write. Kimley Electric Co., 2663 Main St., Buffalo, N. Y. $16 A DAY Easy—I start you in auto accessory business; no investment; no ex- perience necessary. Landin, 3433 Montrose Ave., Chicago. GENUINE Gold Leaf Letters anyore can put on Store windows. Guaranteed to never tarnish. Large Profits. Enormous Demand. Free Samples. Write today. Metallic Let- ter Co., 438-D North Clark. Chicago. GOLD-LEAF Sign Letters; make and sell; 1,000% profit. Johnsten Co., Quincy, Tl. _ AT Last! Diamond Rival Discovered! Amazing blue white Rajah Gem astounds jewelry world and deceives experts. Beauti- ful sample case free! $100 weekly. Quick! Rajah Diamond Co., Dept. F20, Salisbury, N.C.

$31.00 PROFIT—with $1.50 Outfit—Big Money—Easy Work. Selling Gold Mono- grams for Automobiles, Luggage, Windows, Wagons. No Experience. No License. “‘Sam- ples Free.’ NuLife Monograms, Hartford, Conn. OUR New Household Device washes and dries windows, sweeps, cleans walls, scrubs, mops. Complete outfit costs less than brooms. Over half profit. Harper Brush Works, 132 Srd_St., Fairfield, Towa. REAL Whirlwind Seller—Nopulout Custom Shirt. Every man buys them. Patented— no competition. Liberal commission. selling kit. Make $15 up daily taking orders direct from consumer at manufacturer’s prices. District or local agents. Write Nopulout Sifrt Co.. Dept. Y, Hazleton, Pa. SELL absolute necessities. 25e. Prices lowest.

Cost 2c, sells Seven different samples 300 Catalog Free. Mills Sales Co., 13 East 16th St.. New York. SELL men’s neckwear: wonderful proposi- tion. Astor, 318-M_ Broadway, New York. DO you want good live agents—fellows who can get the business? Ask me how others are doing it. I'll gladly render the neces- sary assistance without cost to you. Address, M. L. Rund, Mer. Classified Advertising, Popular Mechanics Magazine, Chicago NOVELTY bedspreads. Silk and cotton fabrics. Guaranteed. Reasonably priced. Every housewife wants one. Liberal ter- ritory and commission. Write Rainbow Novelty Mills, Grover, N. C. . WE Start You Without a Dollar. Extracts, Perfumes, Toilet Goods. ence unnecessary. Carnation Co., 2480, St. Louis.

Soaps, Exneri- Dept. SECTION 57 $75 WEEKLY. Man or Woman Wanted with ambition and industry to distribute Rawleigh’s Household Products to steady users. Fine ngs near you. We train and help you so you can make up to $100 a week or more. No experience necessary. Pleasant, profitable, dignified work. Write today. W. T. Rawleigh Co., Dept. IL8253, Freeport, Ill. a: WANT Distributing Agent for Handslick, powdered hand soap; removes anything from hands; everybody a customer; sample free. Solar Products Co., J-2142 8. Troy, Chi- cago. - ALL-YEAR-ROUND profitable business selling wonderful new water softener and cleaner. Removes grease, oil, ink and dirt quickly. Every home and business place a live prospect. 100% profit. an J repeat or- ders. Exclusive territory. Write for free somata. Seacoast Laboratories, Sea Bright,

GOLD Leaf window letters and script signs. No experience; 500% profit. Samples free. Consolidated, 69-U_West VanBuren, Chicago. AGENTS: both sexes, we manufacture and control new household article. Fast seller. Big profits. Exclusive territory. Write ow. Connolly, 123 Liberty St., New_York. SEND name, address on postcard. Free introductory copy Salesology Magazine; con- tains 1,000 money-making opportunities. Offered by big reliable firms; no obligations. Salesology Magazine, Desk B-38, 500 No. Dearborn, Chicago. 32 SECONDS complete tire change by Detmer, Ohio, with Morey Quick Action Rim Tool. Sold, singly, 49 three days, cleared $100. Anderson, Mont., sold 1400 in 14 weeks. Get details for good territory. Har- yest time Now. M. Morey Rim Tool, Buffalo,

SOMETHING New. buyer of our _ electro-magnetic-emergency Wonderlamp; takes only one minute to demonstrate and make a sale; no experience necessary; $5.00 an hour easily made, full time or evenings. Write for sample. on- derlamp Co., 926 Fisk Bidg., Dept. 10-A, New York. Ss ; SELL—Farm necessity for repairing sag- gins fences. Write Hawbaker Co., Elmore, nn. AGENTS and District Managers: 250% profit selling exclusive, new process Artistic Signs, Hundreds of titles for every busi- ness. No competition. Write for details. Artistic Signs, 799R Broadway, New York WILLIAMS’ Powdered Hand Soap has taken auto owners by storm. Cleans dirtiest hands instantly. Easy demonstration sells on sight. Free Sample and particulars. W. = rene, Inc., Dept. 266, Montclair, Every motorist a

1 AUTO Gas Saver Free. To introduce. All makes. Amazing mileage increase. Critchlow, C6-805, Wheaton, I __ AGENTS—Mosco Corn and Callous Re- mover will build you a steady repeat busi- ness. Send today for ket size trial out- fit. The Moss Co., 357 Searle Bldg., Roch- ester, N. Y EVERYBODY toilet preparations. Sell dainty, exquisite, delicately scented, Duo compacts, perfumes, powders, creams and lotions, Flavoring extracts and Special- ties. Duo Co., TP-1, Attica, N. Y. RADA-DIAMOND rivals the genuine dia- mond. Rich or poor buy them. Low price, fast. sales, big profits. $10,000 yearly for hustlers. Pocket case free. National Co., Box 1174-PM, Omaha, Nebr. _ AGENTS, Get our prices on Coffee, Tea, Desserts. Soaps, Perfumes, ete. Endless va- riety, superb quality, quick service. Sample display free. Address Blair Laboratories, Lynchburg. Va. a AGENTS: 500% profit. “Happy Home Make Shampoo” builds your own big business Martin of Indiana made $75.00 in one day. Missouri man made $750.00 one month. Exclusive territory. Geo. A. Schmidt & Co., Dept. P, 236 W. North Ave.. Chicago me PHOTO Medallion Men and Women, the largest line of Photo Novelties in the world. Lowest prices, quickest service. Send for catalogue showing over 200 money makers, Photo medallions, photo medallion clocks, photo mirrors, photo fountain pens, photo powder compacts, photo jewelry and photo buttons. Gibson Photo Jewelry Co, 608- 614 Gravesend Ave., Brooklyn, N. Y¥ SELL ‘‘Fixit’’ Rubber Repair. Big pay. Doubles mileage of tires and tubes Self- vuleanization without heat or tools Big season now. Marquette, Z 2325 Wolfram, uses

Chicago.

Page 238

58 POPULAR DON’T sell for others. Employ agents yourself. Make your own products. Toilet Articles, Household Specialties, ete. 500% profit. We furnish everything and show you how. Valuable booklet free. Write at once. National Scientific Laboratories, 1970W_ Broad, Richmond, Va. THE best tooth-paste for Pyorrhea is Zi- O-Dine. Every tube guaranteed. Taste and cleansing qualities wonderful. Fifty cent tubes. Agents wanted. Iodine Products Co., Laurel, Miss. AGENTS: Our gold-eyed Needle Cases are wonderful sellers; immense profits; $50 to $300 weekly; proof and particulars free; sam- ple outfit 10c; pad prices. Paty Needle Co., 231 Davis Square, Somerville, Mass. _ CALIFORNIA _ perfumed - heads selling like hot cakes. Agents coining money. i Catalog free. Mission Fac- 2328 W. Pico, Los Angeles, OUR Luminous Crucifix Shines in the Dark. Every one amazed at the wonder- effect. Easily demonstrated. Easily . W. G. Hannan Co., Dept. B, 2539 State St., Chicago. DIRECT Factory representatives changeable letter window display signs. income assured. Experience Maze Manufacturing Co., Chicago. A BUSINESS of Your Own — Making Sparkling Glass Name and Number Plates, Checkerboards, Signs. Big Book and Sample Free. E. Palmer, 512 Wooster, Ohio. AGENTS—New Plan, makes it easy to earn $50.00 to $100.00 weekly, selling shirts direct to wearer. No capital or experience Represent a real manufacturer. Write now for Free Samples. Madison Company. 566 Broadway. New York. GET Our Free Sample Case—Toilet ar- ticles, perfumes and specialties. _Wonder- fully profitable. La Derma Co., Dept. A, St. Louis, Mo. BIG Money and Fast Sales. Every owner buys Gold Initials for his auto. You charge $1.50; make $1.35. Ten orders a day easy. ‘Write for particulars and free samples. American Monogram Co., Dept. 40, East Orange, N. J. ss ots adil POLMET—The Wonderful Polishing Cloth that cleans all metals without liquid, paste or powder. Approved by ‘‘Good Housekeep- ing’’ and ‘“‘Modern Priscilla’’—sells fast at 25e. Sample free. Gale & Co., Inc., Edinboro St.. Boston. MAN in each town to plate auto parts, reflectors, bathroom fixtures, refinish beds, mirrors, chandeliers; by new method. No capital or experience required. Simple plan of manufacturing at home starts you in big money-making business. Outfit furnished. Free particulars and proofs. Gun Meta Co., Ave. H, Decatur, Ill. REPLATE brassy worn-off Automobile parts, Reflectors, Bath Room Fixtures, Worn Spoons, Forks, etc., with pure silver. Looks Use U-Kan-Plate Polish. Posi- tively no mercury. $1.00 half pints. Post Paid. Satisfaction Guaranteed. Agents wanted. Dept. A, U-Kan-Plate Co., Phila- delvhia. AGENTS — Stamping names Key Protectors; sample Check with your name and address, 25c. Stamping Outfits. Emblem Checks, Check Fobs, Name Plates. Hart Mfg. Co., Desk 2, 303 Degraw St., Brooklyn. N. Y¥ ONE of the biggest mails on earth. § to any address for 10c. Louisiana Distrib- uting Service. Dept. PM. Harmon, La. AGENTS-—Build permanent business with sign letters. Easy work. Big Samples free Acme Sign Letter 312 Dunn _ St., Sta. R, Cincinnati. NO difference what you're selling, you ean increase your sales 500% by giving our $1000 policies as free premiums. Costs you nothing. Write National, 715-M Baltimore Bidg.. Chicago. PATENTS. Time counts in applying for patents Don’t risk delay in _ protecting your ideas. Send sketch or model for in- struction or write for free book ‘“‘How to Obtain a Patent’’ and ‘‘Record of Inven- tion” form. No charge for information on how to proceed. Communications strictly confidential. . careful, efficient serv- ice. Clarence A. O’Brien, Registered Pat- ent Attorney, Security Bank Building (di- rectly across street from Patent Office), Washington, D. C. See pages 140 and 141. “NEW Camera. Regular black and white photos finished quickly inside camera. Make money selling cameras, taking photos or doing both. Crown Com- pany, Dept. 481, Norwalk, Conn. So for Good unnecessary. Norwood Station, on Pocket Sent MECHANICS ADVERTISING “LIQUID-LEATHER” Shoes, Rubbers, Tires. Dries Instantly. Pliable, Waterproof. Just Imported from France. Tube Retails 75c—Cost 35c. Sells Housewives, Sub-Agents. Nulife Leather, Hartford, Conn. ~ REMNANT Store, Bethel, Ohio. Dry Goods Bargains on Earth. Dealers. ~ AGENTS — Clever Invention! makes every pen a fountain pen. seller; big profit, where. free. H. New York, EARN $10 daily silvering mirrors, plating and refinishing metalware, autos, chande- liers, bedsteads, headlights. Outfits fur- nished. E. Decie Laboratories, 1133 Broad- way, New York. sa AGENTS—Make a dollar an hour. Sell Mendets, a patent patch for instantly mend- ing leaks in all utensils. Sample package free. Collette Mfg. Co., Dept. 404, Am- sterdam, N. Y. Fills Holes in Greatest Agents and Inkspoon Fast office demand increasing every- Exclusive territory offered. Sample WY. Company, Tribune Bldg., SECTION $10,000 YEARLY Easy. No Expe. Necessary. Selling Fast Seller Rol oe cial Policy which Pays $5,000 Accidental Sick Weekly Benefits, $50 Weekly ac. dental Disability—$24 yearly—Other ‘Amounts Proportionate. No Medical Examinatj : Greatest Bargain. $5,000 Accident Polici fir. Minnee, American Pes neering this aa . erican Peopl North State St.. Chicago i" 107-159 WANT Producing jamie and See advertisement under Advertising cies, page 49. Frank W. Lenhoff tising Agency, _Chicago. PAVED Road Maps—Handy, for advertising and premiums sight. Full or sideline. ples on request. pany, Indianapolis. GOLD Leaf window letters — signs. No experience ; Samples free. Consolidated, Van Buren, Chicag agents? Agen- Adver- inexpensive . Sell on Proposition, sam- George F. Cram Com- and script 500% profit. 69-V West AGENTS—Send for Free not’’ Washday Wonder. don’t have to talk; sight, leave sample. Credit given. Empire Specialties Co., 1549 N. Wells. Dept. 101, Chicago. AGENTS make $100 week placing adver- tising Cigar Lighters with glass _ front. Every dealer wants one. Write for free plan. Drake Mfg. Co., Dept. M, Milwau- ee, Wis. BIG Profits. Sell er Water Filters. send for 6 dozen, Sample ‘‘Fret- Big Profit. You if she doesn’t buy at Exclusive territory. “"No-Splash’’ 4-Strain- Fast sales, lowest prices; $1.80 postpaid. Jones Mfg. Co., 243E2 Franklin St., Boston, Mass. FREE Sample. ‘Rain Shield Wiper,’’ Retails $1.00—Cost_ (25 cents). Sold Clear and Rainy Days. No Cloth—No Paste—No Attachment. (1) Rub keeps’ windshield clear 48 hours. Experience U y. SPECIALTY en ualifi te Position making - a $1,000 monthly New electric sign. Extends 4 feet over side walk. Illuminated letters and border Selling on sight at $25. Big commission. Flashtric, 2126 Hudson, Dept. P-2, Chi- cago. BIG Season Just Ahead. Advertising pencils more popular every day—every business prospect. Our line repeats Big commissions. Established 1902. North American Pencil Works, 126 So. Clinton, Dept. 129AB, Chicago. SALESMEN—Get “ree outfit and make $90 a week taking orders for famous Taylor rain-proof, made-to-measure cape and knickers for men. Also eight other big profit-makers. Commission in ad- vance. We deliver, Taylor Cap Manu- facturers, Desk U-2, Cincinnati, Ohio NuLife Corporation, Hartforu, Conn. $50.00 WEEKLY easy, Applying Gold Initials on Automobiles. No 1 oe needed g profit every $1.5 job. Free Samples. ‘‘Ralco a. 1043 Washington, Boston, Mass. OVER 100% Profit. Self Lighting Gas and Cigar Lighters; Everybody interested, repeat business. Sell individuals, dealers, su ts. Particulars Free. P. Bern- hardt. 127 West 30th St., ' York. AGENTS—N-R-G Laundry Tablets, the old reliable moneymaker for live agents. Millions sold—200% profit—sales waiting for you. Clothes washed spotlessly clean in 10 minutes without rubbing. Free samples. N-R-G Company, 230 W. Su- perior, Chicago. ~ HAIR Tonic—Concentrated. Add water and bottle. Labels free. Outfit for 36 dollar bottles, postpaid $1.00. Casey, 1043 Wash- ington. Boston. Mass. AGENTS—Mac’s liniment (liquid mustard plaster) for coughs, rheumatism; Mac’s Black Lotion for pyorrhea, wounds, sore gums, piles. Mac Chemical Corp., 74-A West St., New York EVERY “Woman Wants a Heme Sewing Sets contain sewing articles. $4 an with this 50c_ seller. East 23rd St., New York. BIG Profits: Steady Income our line food products, toilet articles, soaps. No cash or experience needed. Sam i case Dept. St. Sewing Set. 142s useful hour easily made Prentice-Lee, 145 free Write Linro Co., Louis, Mo. HIGH-GRADE SALESMEN WANTED WANTED—Tailoring Salesmen, make $60 to $125 per week. e are the largest made-to-measure tailoring house in the country, a elaborate sample equip- ment. Over 150 all wool fabrics sell at $2: 3.50, $29.50, $34.50 and $43.50 which in- cludes commissions of $3.50 to $8.50 and bonus. Guaranteed absolute satisfaction, perfect fit, best workmanship, or no sale. We maintain an absolute 6-day delivery schedule. Write for our line and all ac- cessories to be sent free. Tell us all about yourself. Edward E. Strauss & Co., Inc., Dept. 101, 402 So. Market St., Chicago. TRAVELING Salesmen Calling on Retail Stores wanted by large manufacturer of fast-selling specialties entirely different from the average Year-round gales, main or sideline. Big commission paid immediately on original and repeat business. Oppor- tunity for well paid and permanent connec- tion with old-established firm. If not mak- ing $150 weekly. write today. Union Spe- cialty Works, Dept, 222, Boonvile, N. Y. 75.00 WEEKLY to Introduce ‘‘Chief- tain” 3 for $4.95 Guaranteed Tailorai Shirts. Full working outfit Free. Your own Shirts Free. Cincinnati Shirt Com- pany, Lane 2946, Cincinnati, Ohio IF you want to get into a real money- making business, and help others at the same time, sell Radiumized Health Proi- —_. A world-wide unlimited field now pen to producers. Exclusive _ territory. Write Radiumized Applicator Co., 1303-P Fillmore, Buffalo, N.Y. SELL Paint. Easy to sell Paint, nishes, Roofing, Motor Oils, on 60 days’ credit, We pay freight. Big commis- sion. Money advanced. We deliver and collect. Write today for Free Sample Outfit. Loverin & Browne, Fi6i? %o State, Chicago. IF You Think In Terms Of $6, 000 4 This Year, write us now. Strong line for re- tail stores. Nationally advertised Es- tablished concern. season now starting. Liberal weekly advance to pro- ducer. Continental Co., 2010 Euclid, Dept. 1300, Cleveland, © Ohio. EARN $20 a Day. Established income for life selling for $1 a year $1,500 ac- cident policy. Write W. C. Stone, A-ll So. LaSalle, Chicago. ~ SELL Var- Printing—Business stationery. 40% commission. big repeater. Samples free. ns Co., 515-1 Broadway, Sand Personal Large line: Roberts Albany, N ~"MEN—Sell dependable shrubbery trees, etc. Steady demand. Comp! o) operation. Commissions paid aoe. We deliver and collect. Write Perry Nurseries Dept. R-6, Rochester, N. Y. $60-$200 A WEEK. Genuine Gold ters for store windows. Easily app Free samples. Liberal offer to agents. Metallic Letter Co., 238-A Clark, Chicago FOUR $7.50 sales to merchants $20.00 daily. Sayers Systems, 28° field Ave.. Chicago. Tl hk ANY Salesmen Can Sell Them! Mere! everywhere use punchboards. Someon them, why not you? Collect big com daily. Newest, largest, elaborate ca sent upon request. Lincoln Sales Co., Clinton. Chicago. Dept. D. BECOME Your Home Town's Business Man. Big commission ing Groceries, Coffee, Canne’ Paints, Motor Oils, Roofing, Tires sumers. Free Sample Case Mone vanced Liberal Credit. No exper x. necessary. Loverin & Browne, F10! State, Chicago,

Page 239

Chief- ailored Your Com- money- at the Prod- d now rritory 1303-P , Var- ’ days’ ommis- er and Sample 17 So 0 This for re- 1 now to pro- Euclid, income 00 ac- », A-ll Personal arse Ties, sid Let- applied general A North net you 3 Shef lerchants yne sells POPULAR MECHANICS ADVERTISING SAL ESMEN—Beseme. Independent. Own Your business, experience sell- ing our $7,500.00 Accidental Death; $50 ‘Accident; $25 Sick Weekly Benefits— $12.50 Yearly. Other Amounts propor- tionate. Guaranteed steady income from renewals. $250.000 Deposited Insurance Department. Universal ae Dept. A, 30_ Clinton St., Newark, bang pn Be PEF. BR ainst the ur $5 to $15 daily ing the next four months with an absolutely new line of I 12 osiery, months? Your pay daily. extra. Magnificent sample outfit If so, send name and address now to Ma- ott Oni Textile Cor Company, Road 2606, Cincin- na’ MILLIONS of business men waiting for Brand New indispensable $10.00 office utility saving hundreds of dollars an- nually. One man sold sixteen in three hours. Splendid profits. Write quick for trial offer and exclusive = Dene BT, Lightning Caleulator Grand Rapids, | Mich. f the De Beats. Thetails $5,00—Cost $1.00—Profit $1.00 “Nem rE yoctor ys quic Gutter. Federal Association, Hartf Conn tse PROFIT on $1.00 sale. Auto, furni- ture and glass cleaner. Your name on label. Exclusive rights; free sample. Mfg. E., 213 Griswold, Detroit, Mich. “~SALESMEN earn One Hundred Dollars a week selling lowest — —s og electric signs on easy terms. mis- sion to start; salary, expenses ind thirty days. The McSavaney Company, Spring- field, Ohio nee MSS b's TOOL Salesman for complete line of automotive tools sold direct to mechanics and repair shops; exclusive territory; 30% commission Automotive Tool Mfg. Co., Milwaukee, _Wis. You rem Wanted. Men-Women 18 up. Get U. 8S. Government Life Jobs. $95.00 to $250. 06 Month. Steady work. Paid summer vacation. Pull or ex ence unnecessary. Common education sufficient. We coach you waneet leaving — 32 page particulars free. Write immediately. Franklin Institute, Dept, K3, Rochester, DOUBLE Your Income. Read Oppor- tunity, the Magazine that offers thousands of openings to double your income. Sent Free, Just send your name and address Opportunity Magazine, 750 N. Michigan, Dept. C-1, Chicago. MEN to train for locomotive firemen on railroads nearest their homes—everywhere; beginners $150-$250 monthly; promoted, locomotive engineer, $3,000-$4,000 yearly. Best paying positions on railroads. Rail- way Association, Desk M1, DON’T sell ..~ others. Articles, Household Specialties, etc. 500% Brooklyn, N. Y. profit. We furnish everything and show you how. Valuable booklet free. Write at once. National Scientific Laboratories, 1970W — Richmond, Va. a Dot BLE Your Incom Read Oppor- tunity, the Magazine that. ‘offers thousands of openings to double your income, Sent Free. Just send name and address. Op- portunity Magazine, 750 N. Michigan, Dept c-3, Chicago, DON’T sell for others, Employ agents yourself. Make your own products. Toilet Articles, Household Specialties, ete. 500% profit We furnish everything and show Valuable booklet free. Write at once. National Scientific Laboratories, 1970W Broad, Richmond, Va. $20 DAILY easily. New Patented es GOVERNMENT Jobs. Mai Clerks, hallway Postal Clerks. * $1 700-$3000 year. Men 18 up. Steady. Sample coach- ing free. Write today sure. Franklin In- stitute, we K16, Rochester, N. Y. EE Profits Silvering Mirrors at Home. pin autoparts, headlights, ta- bleware, stoves, etc. Outfits furnished. Details free. Write Sprinkle, Plater, 287, Marion, Ind. IF you can devote spare time to profitable work that pays $2.00 to $4.00 an hour, write us at once. No experience necessary. Nawceo Company, Dept. 6-B, Covington, Ky. . Merehants buy on You collect and retain your We make deliveries and collee- tions. Exclusive territory. Manager, 1059 Bell Telephone Bldg., St. Louis, Mo. MEN wanting to prepare for forest ranger job; $125-$200 month; nice cabin. Hunt, trap and patrol. Nat’l Forest list free. Write, Rayson, Dept. B-46, Denver, Colo. MR. BRUSH Salesmen—Old Established New York brush manufacturers require serv- ices of men in all territories to sell their extensive line of Sanitary Twisted in Wire 1€8 We pay larger commission than other brush house in the country. Write ediately for our proposition. Wire Grip Sar ok, Brush Corporation, 15 Mercer 8t., ew CAPABLE salesmen organizer. eren Good ref- Ask about district.manager prop- osi Permanent, interesting work. Same territory. Your own business. Big annual income Fairview Nurseries, Dept. MC, Geneva, N. Y. SEND name, address on teard. Free introductory copy Salesology agazine; con- s 1,000 money making opportunities. ed by big reliable firms; no obligations. Salesology Magazine, Desk B-39, 500 No. Dearborn, Chicago. a SPECIALTY Salesman wanted. Big com- missions being earned selling Ever-Ready Write for particulars. ( Company, Greenfield, Ohio. 7 (KE orders | for coffee, flour, dried fruits, canned goods, staple groceries, toilet articles, ! radio sets, auto and tractor oils. No capital or bond required. We deliver and colle Permanent business. Big pay. Write at once. Hitchcock-Hill Co., Dept. icago. , MOTION—Color—Light plus changeable (ter system make ours the last word in w salesmen. Actually boosts sales to 400%. Every show window means mit erested prospect. Get the facts and pocketing $100 weekly. Display a Company, A409 East 3lst, Kansas Ever- Ready TOOL — Salesmen—Mechanics—Distribute cuaranteed line auto repair tools. Exclu- sive business of your own. Show 71 sam- Je » in case Big commissions. Quality Tools Corporation, Snow Wilmington, Pa. HELP WANTED bd \NTED—Men—hboys. Learn Auto Re- Pairing $35.00 week. Sample lessons free. Pr _ lin Institute, Dept. K-400, Rochester, IF you are a man worthy of the name and not afraid to work, I'll bet you $50.00 you can’t work for us thirty days and earn less than $20.00. Think I’m bluffing? Then answer this ad and show me up. Open- ings for managers. Wonder Box sells on sight. The best selling proposition in America today. Write Tom Walker, De 120, Pittsburgh, Pa. SECTION 59 SEND name, address on postcard. Free introductory copy Salesology Magazine; con- tains 1,000 money-making opportunities, Offered by big reliable firms; no obligations, Salesology Magazine, Desk B- 40, 500 No, Dearborn, Chicago. . “GOOD Profits. Send 25¢ cartoon lesson $1.00, GPO, Box 471, New York. INFORMATION 3 INTERESTING Magazines, 30c. | “Judge Lindsay Debate.”” “Life Enigma,’’ ‘Hell Fallacy.” Exponent, Orlando, Fa. SPEECHES. No matter where you must speak, here is help. 366 pages of instruction and anecdotes, toasts and complete speeches for the amateur or professional. Send no money. Simply write a postal for “‘Speeches, Their Preparation and Delivery.”’ Pay post- man postal charges and $1.25. Popular Me- chanics Press, Room 906, 200 E. Ontario St., Chicago, Il. THIS is the season for making repairs about the home. Easily done with instruc- tions in our new book. Tells exactly how to use tools, sharpen tools and cutlery, repair furniture and cabinets, upholster, work metal, solder, work glass, paint, stain, varnish, hang paper, repair plumbing, furnace, elec- trical equipment, shoes, harness, gloves and concrete work. Send no money. Just write and ask for “The Practical Book of Home Repairs.’ When postman hands you the book, pay him $2.50 and the postal charges, Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Il. MAILING LISTS 1,000 NAMES, $1.00. Mention Classifi- Woodbine, cation. Wineholt Sales Co., Penna. LETTER SPECIALISTS LETTER Specialists, national reputa- tion! Powerful Messages $5.00! Prartical! Resultful! Investigate! Finkel, 15 Fair- view, Jersey City, N. J. BUSINESS SERVICE COLLECTION stimulators that collect accounts $3. Fred Beach & Co., Vin- cennes, Ind. _ BROADWAY 200—Best address in New York. Two blocks from Wall Street. Beau- tifully furnished office. Woodwork snow white, green carpets, oak furniture. ‘‘Desk’’ or “Mail Privilege’’ exceedingly reasonable, We forward your mail daily. Room 404." ACCOUNTS, Notes, claims collected every- where. No charges unless collected. May’s Collection Agency. Somerset. Ky. ten MOOR AL Representation in Washing- ». Anything, Anytime. Service, Victor Blig. TYPEWRITERS AND SUPPLIES POSTAL Clerks—Carriers. $1700-$3000 year. Men 18—up. 25 coached free. Write immediately. Franklin Institute, Dept. K16, Rochester, N.Y. ARE You Old at Forty? See our adver- tisement on page 74 of this issue. The Electro Thermal Company, 2169 Main &t., Steubenville, Ohio. = ~ CASH | paid for butterflies, insects. See Sinclair Display Advertisement on page 32. MEN, Qualify for forest ranger job; $125- $200 month and home furnished; permanent; hunt, fish, trap. For ge write Norton, =. Bldg., Denver, Colo. S. GOVERNMENT wants men. $1, Voo-41. 900 and up at start. Railway Mail clerk examination coming. Let our expert (former Government examiner) pre- pare you for this and also Rural Carrier, Post. Office, Customs, Internal Revenue, and other branches. Write today for free book- - ate 8, Patterson School, Rochester, GOVERNMENT positions pay $35 to $75 weekly. We help you get them. Big Lid 101, St. Louis Free. Write, Mr. Ozment, Mo EARN $10 daily silvering mirrors, plating and refinishing metalware, auto, chande- Mers, bedsteads, headlights. Outfits fur- nished. E. Decie Laboratories, 1133 Broad- way, New York Bree BECOME a Landscape Architect. Un- crowded profession of wonderful opportunity for money-making. Easily mastered by mail. Earn while you learn Write for book. American Landscape School, 56-E, Newark. N. Y¥ Se SILVERING Mirrors, French Plate. Eas- fly learned; immense profits Plans free. Wear Mirror Works, Excelsior Springs, Mo UNDERWOOD Typewriters—only $3.00 down. Easy monthly payments. Low prices at less than manufacturers, 10 days’ free trial. Rebuilt, all worn parts replaced. Just like a new machine. 5-year guarantee. Write for a big free catalog. A-151, Ship- man-Ward Mfg. Co., 1515 Shipman Bldg., Chicago, TM. 100 TYPEWRITERS Free. Overstocked. Rent Rebuilt Underwood or Remington $3.00 month. if you pay its value in rental, we give machine free. Particulars free. Pitts- burgh Typewriter Exchange, 945 Hersch Bldg., Pittsburgh, Pa. TYPEWRITERS, all standard makes. $10 up. Fully guaranteed. Free trial. Write for complete illustrated lists. North- western Typewriter Exchange, 121 N. Fran- cisco Ave.. Chicago. _ 100 CARBONS $2.00; somites | Ribbons, guaranteed, 75c; two $1.2 PJ, 1927 N, Hoyne, Chicago. TYPEWRITERS, all standard makes, thoroughly re-manufactured by the famous “Young Process’ and shipped direct from factory to you on 10 days’ trial. Guaran- teed 5 years. Easy monthly payments. Write today for free catalog. Young Type- writer Company, Dept. 5746, 654 W. Ran- dolph St., Chicago. TYP EW RITERS, $5-$35.00: Motorcycles, $15 00-$75; Radios, $9.00-$65.00. Knight's, 1512 Locust, St. Louis, Mo. PRINTING, ENGRAVING AND MULTIGRAPHING NEARGRAVURE Process Printed Sta- tionery—Exquisite Samples—See the Dif- ference. Sollidays, Knox, Ind RESULTS-BRINGING ~ printing—writing —artwork—complete advertising and print- ing service Moderate cost Tricraft House, Box 280, Harrisonburg, Va

Page 240

60 POPULAR MECHANICS ADVERTISING MULTIGRAPHING business correspond- ence, two dollars thousand. Hammermill letterheads, four dollars. Miscellaneous gontins. Mayera Corporation, Monmouth, GENUINE Engraved Stationery — 125 sheets and 100 envelopes engraved three lines for $5. Request samples. Artcraft Engraving Co., 117 N. Wells, Chicago. _ MIMEOGRAPHED Letters by Special- ists; Low prices; Samples. Letter Service, 620 Woodland, Kansas City, Mo. 200 Sheets and 100 Envelopes printed, $1.00. Write for samples. Brooks, Printer, Glasgow, Ky. FREE trial. Marvelous Calculator, Adds, Subtracts, Multiplies, Divides automatically. Work equals $300.00 machine: trial Pocket Calculator, only $2.00 cash. ming, Calculator Co., Dept. E, Grand Rapids, cn. FOR SMOKERS SEND 10c, Silver or Stamps, for sample package 20 finest quality cigarettes. Large tin Special smoking tobacco sent for loc. Direct-to-Smoker. French Tobacco Com- pany, Dept. 19, Statesville, N. C. PERSONAL Stationery. Excellent qual- ity paper. Name address neatly printed. Samples free. Wesley Dyer, 40 Pleasant St., Auburn, Me. BOND letterheads, statements. 250, 1051, Fargo, N._D. site PRINTING: Catalogs, folders, letters, ete. Lowest prices. Samples free. Pitts, Amana, Iowa, roth Let ® 250 HAMMERMILL Bond Letterheads. Envelopes, $3.00. Midland Press, 543 West Hickory, Kankakee, Ill. : " 100 EACH, letterheads, envelopes; business, social; $1.00 postpaid. Sherman, Printer, EES $3.00 DELIVERED, 500 watermarked bond letterheads 8%x1l and 250 envelopes. Cash. Catalog free. Printing bargains. National Printing, Goshen, Ind. i EtG COMMERCIAL Printing. Prices Right. Sempice Free. The Fox Press, Frankfort, ‘DISTINCTIVE — Artistic Business Sta- 1,000 Let- or Envelopes Samples. tion Printing Company, 1410-P East Kansas City, Mo. print Stationery, Booklets, Catalogs, Circulars. Samples. Commercial Press, Batavia, Ohio. > QUALITY Printing! Reasonable Prices! Send for Free Standardized samples and prices. Folders. Circulars. Catalogs our specialy. Ernest Fantus, 525 South Dear- born, Chicago. 100 CALLING cards and genuine leather ease $2.00; over one line l0c line extra. 200 standard business cards $1.00; over 5 lines 10c line extra. Sample for stamps. Business Card Specialty Co., Q552, Jack- son, Mich. . 250 LETTERHEADS, 250 Envelopes— Bend, $3.00. Arrow Press, Kankakee, lil. 250 BOND Letterheads, Envelopes, Bill- heads, Cards, $1.35 each. Economie Press, Leonia, N. J. envelopes, billheads, $1.35, Andrews, Box TOBACCO Postpaid, guaranteed Best Mellow, Juicy red leaf chewing, 5 Ibs. $1.40; 10, $2.50. Best smoking 20c Ib. Mark Hamlin, Sharon, Tenn. CIGARS, hand-made wonderful flavor, 10c retail quality. 19 in can, postpaid only $1, (or Order today. bi senyenee Bros., 580 52nd St., Brooklyn, FOR THE HOME GRANDFATHER'S Clock Works. $5.00. Build your own case; Instructions free; make good profits selling your friends. Clock works with chimes for old or new cases. Write for full particulars. Clock Co., Ruff- ner St.. Philadelphia. CEDAR chests only $11.65—‘‘Red-i-Kut” complete with rich copper trim—you as- semble and save half—send for pictures. Furniture Company, Guttenberg, owa. FORGED decorative articles. Andirons, fireplaces, scroll and grille work, lamps, candle sticks, coat hangers, knockers and other hand-forged decorative articles can be made with instructions in new printing of “‘Hand Forging,’’ by Thomas F. Goog- erty. Profusely illustrated. Send money. Write a postal asking for Hand Forging. Pay postman postage and $2.00. Popular Mechanics Press, Room 906, 200 East Ontario St., Chicago, Illinois. THAT Concrete Job. Don’t be afraid to tackle it. With the instructions found in Popular Mechanics Concrete Handbook you can make 173 articles of utility and beauty ranging from ordinary steps to garden fur- niture. is book with our Home Mechanics Handbook that contains 329 helps about jobs that come up about the home will be sent fer only 98c plus postage C. 0O. . Send your order today to Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. THE Home Patrol Burglar Alarm sounds alarm and locks window $2.00 each. Guaranteed. Agents write J. B. Pitts, 32 No. Jefferson St., Chicago. SECTION BUILD your own boat for this , use using Brooks Knock-Down parts or terns. 55 Models, 9’ to 40’; send 50 or complete catalog. Brooks Boat (» Inc., Rust Ave., Saginaw West Side, Mich’ LATEST Ship Model Book—How to make a model of an American clipper ship, ‘soy. ereign of the Seas," by Capt. McCann. Sim- plified construction. Complete details, ¢r- der a copy and pay postman $2.50 ang the postage when he hands you the package. Ad. dress Popular Mechanics Press, Room 90s 200 E. Ontario St., Chicago. F BOAT Building Plans for amateurs Rowing, sailing, speed, cruising. Free cat. alog. Rudder Publishing Company, 9 Mur- ray Street, New York. HUBBELL Marine Coolers convert Forj engines into marine motors. Booklet free Ford speedboat, easily built, blueprint and directions, sixty cents. C. C. Hubbell, 148 Cottage St., East Norwalk, Conn. PROPELLERS, stuffing boxes, bearings, ete. Used reverse gears bought, sold Wm. H. Baker, Pond St., Quincy, Mass AIRPLANE Tachometers, Register Engine revolutions, cost government $50.00, sacri- ficed $10.00. Equipment, Carle Place, N.Y SHIP Models—Worth while. Easy to make. Decorative Ships Picturesque Barbary Pirate Felucca and Beautiful Spanish Treas- ure Galleon (both 17th century). Instructions so simplified that any handy person can make these models with a few household tools almost without expense. No persona! knowledge of ships or naval architecture New book only one of its kind Pay postman $2.50 plus postage when book is delivered. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ml. De ee DIAMONDS, WATCHES AND JEWELRY TRADE your old broken watch for new Elgin or Waltham. Small difference Ralph Pile, Somerset, Penna. WATCH REPAIRING ALL makes of Watches repaired by ex- ay Write International Watch Service ox 5P, Fordham Station, New York. ANTIQUES, WAR RELICS AND INDIAN GOODS WANTED, odd, rare or curious articles for resale. Something out of ordinary Ralph Pile, Somerset, Penna. “ae 100 GENUINE Indian arrowheads from Arkansas $4.00 postpaid. H. Daniel, La- mar, Ark. rn SEND 5c for fine new list Indian relics, antique firearms. F. E. Ellis, Webster Groves, Mo. STATIONERY Printing Deluxe. Sam- og free. Industrial Press, Jefferson City, 0. PRINTING, OUTFITS AND SUPPLIES PRINT Your Own Stationery, cards, bookplate, Christmas cards, circulars, bo: mphiets, ete.; complete outfits, arger, $11, $29; rotary $140. Print for others. Easy and interesting; rules sent. Write for catalogue presses, type, paper, ete. Kelsey Company, K-11, Meriden, Conn. PRINTING Presses, type, supplies. List 2c stamp. Bargains. Geo, Foster, 4342 North Robey, Chicago. PRINTING Outfits—Presses, type sup- lies, type novelties. Send stamp for cata- logue. Model Press, York, Penna. DUPLICATORS AND DEVICES YOU can make 50 to 100 copies of a letter, notice, etc., at a cost of three cents on a Heyer Quality Duplicator. Write for free trial offer. The Heyer Duplicator Co., 14 S. Wells St.. Chicago, Tl. RUBBER STAMPS AGENTS Wanted. Many Rubber Stamps for the price of one. Sells at sight. 20 or more different impressions from 6-line Multiplex. Send your Name, Busi- Street, City, State and $1.50 (Spe- Price). Will mail you prepaid 4- line Multiplex. Multiplex Rubber Stamp Co., 1777 Gower St., Los Angeles, Calif. RUBBER Stamps! Name, Address, two lines 25c. Three lines 35e. Brush & Co., Auburn, Nebr. ADDING MACHINES NEW $3.50 Automatic Adding Machine. Adds, subtracts, multiplies absolutely ac- curate. Capacity $999,999.99. . $8.85; HOME Redecoration Time is here. Get newest ideas and methods from books just published for sale by Popular Mechanics Press. Interior Wall Decoration, Plain and Decorative Finishes, Practical Working Methods. 450 pages. Price $4. Mixing of Colors and Paints, 292 pages $2. Wood Finishing, Plain and Decorative, 360 pages, $2. House Painting Methods, Brush and Spray Gun, 386 pages, $2. s will be sent C. O. D. Pay postman price plus post- age when he hands you the package. Pop- ular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. oa HOW to Make and How to Mend. 1000 articles telling how to repair almost every- thing in use or needed about a home or farm. Many illustrations; formulas and trade secrets. Send no money. Just ask for ‘“‘How to Make and How to Mend.” Pay postman postal charges and $1.00. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ill. RAZORS AND BLADES GENUINE Gillette Razor With Blade 25c prepaid. Address Crotty, Box 1089, Sacramento, Calif. BOATS AND LAUNCHES CLIPPER Ship, 20” sails, deadeyes, _ blocks, anchor $5.00 of fittings. dozen. List - apna 323 Douglas Ave., overall, spars, steering wheel, NEW Boat Book telling how to make 21 kinds of boats. Also many other helpful ideas on boating. « Profusely illustrated. With this we include the big book, “‘Outdoor Sports the Year Round.”’ Directions for making all sorts of devices for outdoor rec- reation. Send no money. Simply pay the postman $1.98, plus postage when books are delivered. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ill. PHONOGRAPHS AND RECORDS RUILD your own phonograph. We fur- nish everything. Catalog sent free. Ameri- can Phonograph Co., 4116 West 24th Place, Chicago. MUSIC AND MUSICAL INSTRUMENTS TREMENDOUS Stock, cornets, saxa- phones, trumpets, slide trombones, sousa phones, clarinets and other instruments New, rebuilt. All makes. Ukuleles, vio- lins. Catalog, bargain list free. Walters- dorf’s, Rebuilders, Creston, Towa. VIOLINS—Fine hand-made. Low Prices Lehto, 935 14th, San Pedro, Calif PIANO JAZZ: _ Fifteen Hot Beginner's Lessons. Particulars! Write Will Mu! veney, Toronto, 3, Canada. i REAL Jazz piano lessons at home, live breaks, endings; African harmony, brilliant runs; professional jazz guaranteed; book- let. Sample Lesson Free. United Schools, P. 0. Box 1959, Boston, Mass SONG poems wanted. A different pro osition. ichard Broughton, Sioux Fa! 8. Dak. a SONG Poem Writers—Address Ray Hi)- beler, D1, 2104 N. Keystone Ave., Chicago VIOLINS, Deep, Mellow, Soulful — on eredit. Easy terms for wonderful instrument Get details today. Gustav F. Henning, 2424 Gaylord St., Denver, Colo. ae “MUSIC Composed’ to words. Bauer Bre. (formerly of Sousa’s Band), Oshkosh 8. SONG Poem Writers Address Monarch, 1472 Broadway, Dept. 104, New York WRITE Songs. Big money and reputa tion. Write for information J. Gordon Pub. Co., 201 N. Hoyne Ave., Chicago Casper Nathan I WANT Song Poems. 3544 N. Racine, Chicago. ietetistne SONG Poem’ Writers — Stamp _ brings “Song Writers’ Guide.” Wm. Van Beaver B1-1239 Elm S8t., Green Bay, Wis Inventior your inv and inst: 430, Wa PATE liable tioner case ] nished §25-A INVE) Write fi Plan for how to at lowes yer, Jen ESTA! Compan} format iot inal ide mann, | LAN( Bldg., \ the For fore dis send for hessed . letin #ry INVE) advice a our Free Tells wh tablished ences. | Chandlee ington. } PATE ences Send mc aminatic Lawyer PERC Loan B establish free.

Page 241

toom CRY new nee Hib- jicago on yment 242 Bauer hkosh narch x eputs yordon athan. brings teaver POPULAR SONGN RITERS—Music Puatiders. Ex- pert professio nal __ service. articulcrs free. .. amond Music ae, Depart- me is, 790 Seventh Avenue, New York. eCOR SB T Saxophonists tists. “Get “Free Pointers.’’ Name t. Virtuosi School, Buffalo, N. Y. PATENT ATTORNEYS instru! PATENTS. Time counts in applying for Don’t risk delay in_ protecting Send sketch or model for in- or write for free book ‘“‘How to Patent’’ and ‘Record of Inven- No charge for information on , proceed. Communications strictly confide ntial, Prompt, careful, efficient serv- Clarence A. O’Brien, Registered Pat- Attorney, Security Bank Building (di- tly across street from Patent Office), Was hington, D. C._ See pages 140 and 141. “PATENTS Procured: Trade Marks Keg- istered A comprehensive, experienced, prompt ice for the protection and de- sent of your ideas. Preliminary ad- vice gladly furnished without Booklet of information and form for dis- closing idea free on request. Richard B. Owen, 30-Owen Bldg., Washington, D. C.. or 41-R_ Park Row, New York. MILLIONS spent annually for ideas! Hundreds now wanted! Patent yours and profit! Write bow to protect ideas wanted,, American Industries, Bidg., Washington, D. INVENTORS—Write for our Guide Book, “How to Get Your Patent’’ and Evidence of Invention Blank. Send model or sketch of your invention for our prompt examination and instructions free. aa & Co., Dept. 430, _ Washington, “PATENTS, Trade- — =. Copyrights. Re- liable services by an experienced practi- ner devoting personal attention to each Inquiries invited. References fur- shec B. P. Fishburne, Patent Lawyer, 525-A McGill Bldg., Washington, D. C. _ “INVENTORS having ideas to patent: Write for Booklet explaining Co-operative Plan for handling your applications. Tells how to sell and safeguard your inventions at lowest cost. Ralph Burch, Patent Law- yer, Jenifer Bidg., \ Washington, D. C. ~ ESTABLISHED 1864. Milo D. Stevens Company. Free Booklet. Patents, Trade- Marks, Copyrights. Offices, Monacnock Block, Chicago; Barrister Building, Wash- ington, D. C. = PATENTS, , Trade- Marks, Designs. This firm has 27 years’ experience and gives ex- pert personal service at reasonable rates. We properly protect your invention. Write for free information and exact cost of procuring patent before proceeds ng. John B. Thomas & Co.. 902 F_St.. N. W., Washington. D. C. ~UNPATENTED 1 Ideas Can Be Sold I tell you how and help you make the sale. Free particulars (Copyrighted). Write W. z Gyemne, 807 Jenifer Building, Washing- ton ~ RICHARD E. BABCOCK, Washington Loan & Trust Bldg., Washing- ton, D. C. Booklet. on i “INVENTOR’S ADVISOR,” Patentbook, with 139 mechanical movements, illustra- tions, sent free. Labinere, Patent Attorney, Three Parkrow. New York. “INVENTORS’ Guide” sent free on re- quest; this book contains illustrations of patented inventions and gives valuable in- formation and advice for all who have orig- inal ideas or improvements. Frank Leder- aon Registered Attorney and Engineer, Woolworth Bidg., 17 12, New York ~ LANCASTER and i Allwine, 221 Bldg &.. Washington, D. C. char e. today for free book—tells yourself, how to invent, how we help you sell, etc. oa 500-Victor “Patent Lawyer, Ouray “Originators of orm Evidence of Conception.’ Be- 7 disclosing your invention to anyone sel for blank form to be signed and wit- iat sed. Form and patent information bul- “INVENTORS: Send sketch or model for advice and exact cost of patent. Ask for our Free book: “‘How to Obtain a Patent.’’ Tells what every inventor should know. Es- tablished twenty-eight years. Highest refer- ences. Prompt service. Reasonable charges. Chandlee & Chandlee, 474 Seventh, Wash- ington D. C ~ PATENTS. Booklet free. Highest refer- ences. Best results. Promptness assured. Send model or drawing for preliminary ex- pminati on. Watson . Coleman, Patent ~awyer, 724 Ninth St., Washington, D. ¢. PERCY S. WEBSTER, 203 Saving and Loan Building. Stockton, California. Long tablished organization. Patent booklet MECHANICS ADVERTISING PATENTS—Write for our Guide Books and ,Record of Invention Blank”’ before dis- closing inventions. Send model or sketch of your invention for Free Inspection and In- structions. Terms reasonable. See adver- tisements on pages 142 and 143. Victor J. Evans & Co., 934 Ninth, Washington, D. C. UNITED STATES and Foreign Patents and Trade Marks; Low rates; easy terms. H. Sanders, Registered Patent Attorney, 7 Rand McNally Building, Chicago. “EDWARD C. SASNETT, Formerly a Principal Examiner U. 8S. Patent Office, Attorney at Law. Strictly personal serv- ice. Correspondence invited, McGill Build- ing, Washington, D. ~ MONROE E. “MILLER, Oo Washington, D. C., Patent Lawyer; Me- chanical, Electrical’ Expert. Booklet and Priority Record blank gratis. PATENTS obtained under Cooperative Se Plan. Write for particulars. W. Registered Patent Lawyer, 951 Jenifer Bldg., Washington, D. PATENTS—Write for Instructions. Miller, Registered Patent Attorney mer member Examining Corps States Patent Office), McGill Washington, D. PATENTS Procured, i, Prompt service. Personal, careful and_ efficient service. Highest references. Moderate fees. Send — or model for actual search and ad- ce. George FP. Kimmell, Master of Patent Law, 54-H Legal Bldg., Washing- ton, D. C. LACEY'S Patent Sense. free. See ad page 146. FOR INVENTORS ee PATENTS. If you have an invention which you wish to patent you can write fully and freely to Munn & Co., for advice in regard to the best way of obtaining pro- tection. Please send sketches, or a model of your invention and a description of the device, explaining its operation. All com- munications are strictly confidential. Our Hand-Book on Patents is sent free on re- quest. This explains our methods, terms, etc., in regard to Patents, Trade Marks, Foreign Patents, etc. ‘“‘Scientific Amer- ican’ contains Patent Office Notes, De- cisions of interest to inventors and par- ticulars of recently patented inventions. Munn & Company, Solicitors of Patents, 1523 Scientific American Building, 24 W. 40th St., New York City; 524 “cientife American Bidg., Washington, D. C.; 1313 Tower Bldg., Chicago, Ill.; 666 Hobart Bidg., San Francisco, Calif.; 521 Nuys Bldg., Los Angeles, Calif % PATENTS. Time counts in applying for patents. Don’t risk delay in _ protecting your ideas. Send sketch or model for in- struction or write for free book ‘“‘How to Obtain and Patent’’ and “‘Record of Inven- tion’ form. No charge for information on how to proceed. Communications strictly confidential. Prompt, careful, efficient serv- ice. Clarence A. O’Brien, Registered Pat- ent Attorney, Security Bank Building (di- rectly across street from Patent Office), Washington, D. C. See pages 140 and 141. WANTED: Specialties of electrical or me- chanical nature, patented or not, that can be marketed through automotive accessory, hardware, electrical trades If specialty meets Delta quality standard, will buy out- right or manufacture on royalty basis and market it through our established channels under nationally known Delta trademark. Send full information and drawings. Delta Electric Company, Marion, Ind. “PATENTS Procured: Trade Marks Regis- tered—A comprehensive, experienced, prompt service for the protection and development of your ideas. Preliminary advice gladly furnished without charge Booklet of in- formation and form for disclosing idea free on request. Richard B. Owen, 30-Owen Bldg., Washington, D. C., or 41-R Park Row. New York et INVENTORS Universal Educator — con- tains 900 mechanical movements; 50 per- petual motions. Tells how to obtain and sell patents. Suggests new ideas. Explains how to select your attorney and avoid patent sharks. Price (revised edition) $1.00 post- paid. Albert E. Dieterich, 621-Ouray Bidg., Washington, D. C. GET your own patents. complete instructions $1. Campbell. Calif INVENTORS—Write for our Guide Books and “‘Record of Invention Blank’’ before dis- closing inventions. Send model or sketch of your inventions for our free inspection and instructions. Terms reasonable. See ariver- tisements on pages 142 and 143. Victor J Evans & Co., 157 Ninth, Washington, D. C. Ouray Bidg., Carl (for- United Building, Valuable book Legal blanks, Cutting Sons, SECTION 61 I SELL Patents. Established Experience, Reputation, Efficiency, ment. The nonsense left out. ice you will eventually employ if a valuable patent to sell. Sen copy for consideration. 773PM_ Garson Avenue, ~ MARKET your own inventions. counsel. See advertisement under tising Agencies, page 49. Frank hoff Advertising Agency, Chicago. _ PATENTS Wanted by mar‘ifacturers; send description, Box 126, Dowagiac, Mich = PATENTS obtained Payment Plan. Write for particulars. W. E. Beck, Registered Patent eae 950 Jenifer Bladg., Washington, D. INVENTORS: —— “names in the line of your invention $1.00. W. D. Schwenk, Box 133, Ferndale, Mich. _ ~ INVENTIONS Developed — Your crude ideas developed into practical form for your patent application. Model not necessary. Send rough sketch and description for esti- mate of cost and advice. 27 years’ experi- ence. Albert E. Dietrich, Engineer and Registered Patent Attorney, 621% Ouray Building, Washington, D. C. ~ WANTED—Substantial articles for mail- order business. What have you to offer’ Write Liberty Novelty Company, 3557 W 22nd St., Chicago, Ill. GOOD Pending Patents keted. Booklet free of Patentees, Barrister ington, D. cad INVENTORS—Sell in 1900. Equip- The serv- ou have Patent Charles A. Scott, _Rochester, N. Y¥ Free Adver- W. Len- “under Cooperative readily mar- American Institute Building, Wash- Your Patent Your- self; get my copyrighted sales plan and list of buyers. Leroy Brown, 1311 Broad- way, Baltimore, Md UNPATENTED Ideas Can Be Sold. I tell you how and help you make the sale. Free particulars (Copyrighted). Write W T. Greene, 806 Jenifer Building, Washing- ton, D. C " I AM in touch with hundreds of moneyed men and manufacturers who wish to buy good inventions. Write Hartley, 38 Court St.. Bangor, Me. WE pay cash for patented ideas we can use in the manufacture of amusement de- vices. Send us your ideas. Spillman En- gineering Corp., North Tonawanda, N. LACEY'S Patent Sense. Valuable book free. See ad page 146. ~ PATENTS—Write to B. P. Fishburne South Coren). Registered Patent ae, © 25-E McGill Bldg., Washington, PARTNER wanted to patent my inven- tions. Fred Petterson, Dothan, Ala. PATENTS FOR SALE THE Hub coffee percolator. A real money- making proposition, will produce a perfectly clear coffee for particular people Can be cheaply manufactured with a liberal margin of profit. Market unlimited. This invention is for sale outright or the article may be manufactured on a royalty basis. This re- ceptacle can be used in any style coffee pot, old or new, for home use, restaurant use and for medicinal purposes such as brewing herbs, etc. For particulars and terms address, _— Bonell, 204% E. 22nd St., Chicago, ~ ‘TWO-ARM Turnstile, half usual width, for theater, park, railroad, omnibus. New prin- ciple. Francis J. McLoughlin, 141 ecalwar. New_York FOR Sale, 5 controlling ~ interest on “patent. John Naef, Ironton, Mo FOR Sale Outright—Animal trap patent. Catches mice and other animals automatically Extremely simple. Enormous field for sale of this trap. Can be made for 18 cents, sells for $1.00. Dies ready to begin operations. Pat’d in 1925 Novelty Mfg. Co., 823 N. Market St. Lancaster, Pa OUTRIGHT, belt guide; running off tractors, etc., when working with side wind. Otto Bochman, Tyndall, 8. Dak. OUTRIGHT: Slip Joint Pliers—Takes the place of pipe wrench, ordinary wrench, socket hand vise Patent No Elmer BR. Carlson, 517 8S. E. Galva, I Glare Shield. any hh. cars. passing a car. - keeps belt from ~ Easily installed on Placed and replaced on Gives perfect satisfaction regardless how bright approaching lights are H. E. Stampley, Sibley, La OUTRIGHT or royalty Patent No 1,575,222, Paring Knife Just the article for aluminum méenufacturer. F. E. Hall, Morris, Minn.

Page 242

62 NEW Device Saves % to % fuel of engines—eliminating carbon and = engine troubles—increasing mileage and power. For automobile and stationary gas_ en- gines. Quickly installed. Sell outright or yalty. Mrs. J Mowrey, 527 Spokane Ave., Portland, OUTRIGHT Royalty: car. Directs Ore. Signal to fasten on Right, Left, ahead, back, park. Controlled by thumb of left hand on steering wheel. Is compact, accurate, inexpensive; has one bulb. Write Harry Sorensen, Box 29, Elk Horn, Iowa. _ APE MIS 12 PATENT For Sale, on Directional Sig- nal for Vehicles; a valuable device in roadway. Sell outright or royalty. For particulars address J. . Almedia, Ar- cade Station, Box 512, Los Angeles, Calif. OUTRIGHT or Royalty basis. Newly patented and useful automobile radiator spout attachment. Paul Schnormeier, Hub- bard, Towa. PATENTED Stamped Metal Duck Decoy excels all others. Hurd, B-591, Klamath Falls, Ore. ROYALTY on wheeled toy. Nothing like it. H. . Holloway, 112 W. Lane Ave., Columbus, Ohio, NOCOST Water Heating Gas Burner, water heated by gas used for other pur- poses. J. A. Frisk, 3839 Roscoe St., Chi- cago, Til, THE lack of proper finance is holding me back on a number of practical useful inventions. I have three wrenches, a drawing tool, coal saver, and a dozen others still in the rough. If interested write me at once. All letters confidential. Cc. B. Stevens, 702 Umatilla Ave., Port- Jand, Ore. _ OUTRIGHT, reasonable, bath tubs, basins, toilets, sinks. Robert Dawson, _ Fairview ‘Cottage, . Skillman, N. J. PAT. 1,569,690, self-cleaning Berry- jicker. Cash or royalty. Write to Wester Wainio, Box 81, Walton, Mich. FOR Sale—Patent on bread slicing ma- chine. Cuts whole or parts of loaves without changing. Good for hospitals, hotels and restaurants. John Jarosz, 110 Lakeview Ave., Lowell, Mass. FOR Sale, Outright—Patent Mop Hold- er, very strong; will fit any Mop Head. R. B. Flake, care Cleggs Hotel, Greens- boro, N. C. FOR Sale—United States and "Canadian Patents—Electric Washing Machine Mount- ed within a wash tub. Klara Schultz, 717_86th Street, Brooklyn, N. vx OUTRIGHT, Royalty— -Adjustable Table, for beds—chairs. No. 175, Griggsville, Il. THE cheapest continual power ever in- vented—takes the place of expensive gas engines, wind mills, steam engines in many ways. Patent Pending. Joseph Weber, Lone Rock, Wis., Inventor. ___ FOR Sale—Patent, Improved Flour Sifter, outright or Royalty Basis. Harry Naka- gawa, Tanana, Alaska. WHY let your patents lie idle? “Tell our two million five hundred thousand readers about it! The majority of our readers are especially interested in new ideas and in- ventions. Ask me to tell you how other in- ventors successfully sold their patents. M. L. Rund, Mer., Classified Advertising, Popu- lar Mechanics Magazine, Chicago. ELECTRICAL ELECTROLYTIC Process of re-sharpen- ing files and hacksaw blades; absolutely cut like new. Inexpensive. Your oppor- tunity to start that business you_have al- ways wanted. Process and plans $1.00 bill, check $1.10. Instolyte Co., 3124 37th Ave. S. Minneapolis, Minn. MAKE Things Electrical. Complete in- structions for making medical coil, buzzer, rheostat, sign flasher, electric toaster, heater, electric grill, soldering copper, crystal re- ceiver, transformer, Tungar rectifier, Duram receiver, motor and other things in fine illus- trated book costing $1.25. Pay postman price and postage when he hands you the package. “Address Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago. pipe joint for POPULAR MECHANICS ADVERTISING FOR MECHANICS ATTENTION — Home Mechanics: « We sell unusual cabinet hardware, chest trim- mings, tea wagon wheels and casters, big line small hinges, locks, etc. Upholstering supplies, electrical hardware, knocked down cedar chests, etc. Send ten cents stamps for catalog. Thurston Manual Training Supply Company, Jobbers and Manufac- turers, Anoka, Minn. _ “BLUEPRINT Reading’ is a compact book telling how to read machine blueprints. Send no money. Just pay postman postal charges and $1. Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, Ill. ~~ KINKS on Metal Work. 419 discoveries for anyone who works with metal. For me- chanic, machinist or the man who tinkers at home. 287 illustrations. Send no money. Just write a postal asking for ‘‘Machinist’s Kinks.’’ When postman hands you book pay postage and price of book, $1.50. Popular Mechanics Press, Room 906, 200 E. Ontario St.. Chicago, Ill. SURVEYING INSTRUMENTS LARGEST stock of new and used survey- ing instruments in the country direct from facto Satisfaction ranteed or money refunded. Wissler, 619 N. Broadway, St. Louis, Mo. MODELS AND MODEL SUPPLIES PATENTS. Time counts in applying for patents. Don’t risk delay in_ protecting your ideas. Send sketch or model f struction or write for free “How to Obtain a Patent’’ and ‘Record of Inven- tion’’ form. No charge for information on how to proceed. Communications strictly confidential. Prompt, careful, efficient serv- ice. Clarence A. O’Brien, Registered Pat- ent Attorney, Security Bank Building (di- rectly ong » Azo from Patent Office), Washington, D. C. See pages 140 and 141. THE ae a magazine for all in- terested in making working models, boats, ete. Sample 10c. Modelmaker, 122 Lib- erty St., New York WOOD'S for Models, inlaying. New York. SPECIAL machine builders, ¢ makers, inventor’s models, of all kinds. Dept. L, Quality Hardware & Machine Co., Ravenswood and Thorndale Avenues, Chicago, Il. WE make working models for inventors and do experimental work and carry a com- plete steck of brass gears and model sup- plies. Send for catalogue. The Pierce Model Works, Tinley Park. Ill. MODELS, Experimental Work, Manufacturing, and Stamping. Bros., Syracuse, N. Y. SPANISH Galleon Ship Blueprints, in- cluding instructions for building, painting, rigging, beautiful 2 foot model. $1.00 complete. Leonard Allen, 332 I. W. Hell- man Bldg., Los Angeles. SHIP Model Hulls. Flying Cloud, %” Scale $9.00. Constitution, Wo” Scale $10.00. Spanish Galleon $10.00. Also complete Construction Sets. Roy Han- cock, 323 Douglas Ave., Portsmouth, Va. WORKING models built. Drawings pre- pared free. Let our designing and engineer- ing departments and 27 years’ experience as- sist you with your invention. Lowest prices. Hohmeier Mfg. Co., 1385 E, 17th. 8t., Cleveland, Ohio. a, LET our experience be your guide. els that are models; for economic manfg. manufacturing in all tion guaranteed. United Machinery Com- pany, Cincinnati, U. 8. A DECORATIVE Work. Directions for dec- orating with pressed leaves, antique painting, preserving plants, bouquets of colored grass, tree cone decoration, fungi decoration, decal- comania, crystallized grasses, Grecian paint- ing copper impressions of leaves, skeleton leaves, leather work, modeling in clay, moss work, paper flowers, pearl work, ornament- ing with shells, etching shetls, tranparencies. All this and much more in ‘““Youman’s House- hold Guide.’’_ Send no money. Just order on postal. Pay postman $2 and postal charges. Popular Mechanics Press, Room 906. 200 E. Ontario St., Chicago, Ti. “MODEL and Experimental Work at low- est cost. Wagar Model & Machine Works, 115 So. Clinton Street, Chicago. Is, Scroll Work and George Wild, 510 East llth S8t., tool and die production work Light Frostholm Mod- tools and equipment Patterns of all types; branches. Satisfac- TWENTIETH h. p. electric motors. Fine for fans or experimenting. Runs off dry cells or radio battery. Finest work- manship. $2.25 each, postage prepaid. Send cash or money order. A. Redmond Co., Flint, Mich, WELDING AND SOLDERING WELDING, Lead burning and soldering outfits, Manufactured by the Welders Supply Co., 120 Opera Place, Cincinnati, Ohio. Write for literature. SECTION MANUFACTURING MODELS, Dies, Manufactur Ide veloped, screw machine ~~ Bh, yi 5 stampings, and contract manufactur of metal parts. Schroer Manufacturing “(Co 2104 Campbell St., Kansas City, Mo. WANTED to manufacture om ro basis, some Mechanical Appliance or za mobiie Accessory. Cincinnati Automatic Machine Co., Cincinnati, Ohio. “WE man manufacture your ir invention, a perfect it, make models, dies. Free ip. formation. — Mfg. Co., 644 W. Ran. dolph S8t., hicago. PiAtTEANE S, wood and metal. Models, tools and dies. Brass, bronze, aluminum and {ron castings. Screw machine work, production work of all kinds. Write Modern Machine & Pattern Co., Terre Haute, Ind. WE help you design, make your models dies, manufacture your products. Standard Die & Specialty Co., 1932 Austin Ave., Chij- cago SPECIAL Machinery or tools, metal specialties, models, speciai ears, stock gears and model supplies a for Catalogue. The Pierce Model Works, Tinley Park, Til. MANUFACTURING Models, Dies, ings, Brass Work, one or thousands. Metsl Specialties, Kansas City, Mo “WIRE goods made to order. Costey Mfg Co., 530 N. Western Ave., Chicag: FURNITURE—Make furniture at home Popular Mechanics books tell how to make all pieces. ‘‘Mission Furniture and How to Make It,”’ Book 1, Book 2, Book 3 Send no money. Just write a postal. Pay px man postage and $3. Popular Mechani Press, Room 906, 200 E. Ontario St, ¢ cago, Ill. ~ INVENTORS, Complete Organization at your service in developing patents, ideas builders, designers of special machinery experimental work, models for demo stration, drawings, tracings, wood met patterns. Wey neon Co., Clinton St., Chicag STAMPING rg ~ Light manufacturing Acme Tool Co., Mason City, la REFRIGERATING Machine, home Operates successfully. Gives better than ice. This and 328 other pratical cles in our book “Home Mechanics Just ask for this and ‘Handbook for Womer containing 394 valuable household he!p: pay postman 98 cents and postage f two books. Popular Mechanics Press 906, 200 E. Ontario St., Chicago, 11! MACHINERY, TOOLS AND SUPPLIES FOR Sale—Owens No. chine with cutters; almost new Pri $275.00. Stainforth, Winthrop, Ma SMALL Milling Machine for sak L. Nortwed, Ethan, Dak. ~ $25 KENNEDY Utility Saw will cross cut, sand, and grind. With ext tachments you can plane, groove, plough, miter, bevel, bore, rabbit, tise, joint, make mouldings, etc. Ba!l Bea ng Table tilts. Ralph Kennedy, lli N. ‘th St., Philadelphia, Pa. CONCRETE Building Block Machi Molds. Catalogue free. Concrete Ma Co.. 5 N. Main St.. St. Louis, Mo OTHERS have successfully sold their ma chinery through our columns—so can } Ask me for proof. M. L. Rund, Mar Classified Advertising, Popular Mé Magazine. Chicago. parts, dies, Stamp- Baum's 0 Milling Ma “~NEW Westinghouse % H. P., 110 60 cycle, A. C. Motors, complete type, all enclosed. Price, $15.00 © Botwinik Brothers, Inc, 67 Water New Haven, Conn. —- CARPENTERS—Ideas for tiose w to tinker with tools, and for protession penters. 40 articles on saws ind 17 on benches and bench equipment doors and door hanging, 18 on lumber mitering, 74 on tools, 22 on shop ¢ and many others—366 in all, and 229 trations. Send no money. Just © postal. Pay postman postage and Popular Mechanics Press, Room 9% E. Ontario St., Chicago, Tl. PATENTED Steel Frame, pu governor, for using Ford motor Satisfaction guaranteed. Dunlap Fordpower Co., bulletin. Kans. PIPE secon for all threads over; Tu second hand, _ practical purposes’ wit! and couplings, sixteen feet cut to your soqulbennenss. also B s. New Fittings. Pfaff & K« 102 Waydell St., Newark, N. J. guaranteed

Page 243

chine odels, ndard Chi- dies, pecial plies metal a & POPULAR Ry 7 Rusiness of your own, small in- — required, doing nickel, copper and silver plating. This work is in big demand. Ful | infor vation free. Electro Platers Sup- 7 547 Considine Ave., Cincinnati, Dio. _ — iia SPEED Lathe $10.50 complete. 7 inch ng. 3 speed cone. Jefferson Mfg. Co., field, lowa. _ foot-power Motor-driven Mortiser Cash or terms, Woodworkers 222 So. Jefferson, Chicago. Saw-Filer, hand drive, complete Set. Will sacrifice for half fac- Detailed information by letter. nzeller, Puerto Cortes, Rep. of . - ; PRENTICE engine lathe, $175.00. Davis engine lathe—quick change, No. 60 Heald Cylinder Grinder, 1 10x32" Landis Universal Piston nd Ge eneral Grinder, $375.00. 20°’ Drill 00. 14° Drill Press $40.00. Com- 1 ne of machinery and small tools. Write { ir catalog. Cincinnati Machinery & Supply Co., 218 East Pearl St., Cincinnati, Ohio ~KINKS on Metal Work. 419 discoveries for anyone who works with metal. For mechanic, machir:.t, or the man who tin- kers at home. 287 illustrations. Send No Money Just write a postal Machinist’s Kinks.”’ When postman hands you book, pay postage and price of book, $1.50 Popular Mechanics Press, Room 906, 200 E. Ontario St., Chicago, IIL — ENGINES, MOTORS AND DYNAMOS MECHANICS ADVERTISING WANTED—MISCELLANEOUS MAIL us your discarded Jewelry, Gold, Crowns and Bridges, Watches, Diamonds, Silver, Platinum and old False Teeth. Money promptly mailed. Goods returned A offer refused. United States Smelting (The Old Reliable), Dept. 71, Chi- cage, REAL ESTATE, FARM AND ORCHARD LANDS $10 IS all I ask down on 20 acres in Mich. Potato Belt. Very easy terms. Near markets, lakes and streams. Write for particulars now. G. W. Swigart, P1276 First Nat'l Bank Bldg., Chicago. “STATE Rd. Riverside Farm, 50 Acres, Private Pond, Furniture, Poultry, geese, implements; bus at door, excellent 7-room house, new hen house, ample barn, etc.; RR. town nearby, only $2500, part cash. ails pg. 48 Spring Cata Det Strout Agency, 255-P, 4th Ave., New York City. EASTERN New Mexico farms and ranches, also oil and gas leases, royalties. Western Land Company, Portales, New ex. LAND Free if planted to bananas. Ba- nanas bear a full crop the second year. $5.00 monthly will plant five acres, which should pay $1,500 profit annually. Reliable com- panies will cultivate and market your ba- nanas for one-third. Bananas ripen every day and you get your check every 90 days. For particulars address Jantha Plantation Co., Empire Bidg., Block 726, Pittsburgh, Pa. BARG AIN S—Motors, Machinery. $6.00, % H.P. $18.75, 1 HP. Electric Drills $14,95. 100 other bargains. Send for “Bargain Sheet No. 630." A Tool Co., 627 Washington St., Chicago. STEAM Engines, 1 HP. $18.00; %— $12.00. James Chambless, Bessemer, Ala. ALTERNATING and direct current motor bargains. All sizes, all kinds, new and re- built. Wholesale price list free. Guaran- teed makes only. Motors bought, repaired, exchanged. Special fan prices. trie Co., 615 HZ So. Dearborn St., ANOTHER lot new 110 v. alternating cur- rent washing machine motors, $5.50 each; three, $5.25 each; six, $5.00 each; 1-12 horse 110 y. universal, $2.75 each. Single motor cash with order, quantity $5.00 cash, bal- ance on delivery. Also other bargains. Queen City Electric Co., 1736 Grand Ave., Chi- ago, Tl GOVERNORS for all auto engines where used for power plants. Send for circulars. 4. C-S Governor Co., Springville, N. Y., or 215 W. Manchester, Los Angeles. yo oy —» & near White River and pr Flee. $5 monthly. gl “ mamerman, e08 N. 5th, Kansas City, Kans. SELL your property quickly for cash, no matter where located. Don’t p mission. Particulars free. Salesmen Co.. Desk B, Lincoln, | PECAN-Orange-Fig Groves ‘On Gulf” Monthly payments. Guaranteed care. Big. quick returns, Suburban Orchards, Dept. M, Biloxi. Miss. LAND Sale. $5 down, $5 monthly, buys 40 acres Southern Mo. Price $200. Send for list. Box 23, Kirkwood, Mo. SEEDS, PLANTS, ETC. WRITE Today for Prices on 1926 Gin- seng Seed Booklet on Golden Seal Grow- ing, 10c. W. N. Long, Florence, Ky. ~ TOMATO—Sweet Potato—Pepper; all | Garden and field Plants. Write d ces. Wm. Guenther, POULTRY WRITE for bargain catalogs on electric motors, generators, electric drills, etc. Do wt buy, consult us first. General Distrib- ng Co., Security Blég., Duluth, Minn. _ MOTORS—New GE 110 or 220 vo volt #60 cycle Single Phase 4% HP d HP, $23.53; 1 HP, $38.50. Mail $3 check or money order. We will ship COD anywhere. Motor Specialties Co., Crafton, Penna. _ GUARANTEED A. C. 14 H. P. 110 V. 60 Cycle “are Machine motors with rd $5.00. 25% required, balance C. O. D. Elle & Co, 1018 W. Lake, Chicago. BLACKSMITHS BE a Master Mechanic Blacksmith and Expert Tool Maker and Dresser with col- ored tempering charts. Price $1.00. Val- able samples free. W. M. Toy, Sidney, no NO. 2 Half-Price Chicks. We have cut our prices almost in two. All kinds. Quick shipment. Three-color catalog free. Mis- souri State Hatchery, Box 711, Butler, Mo. RABBITS MAKE big profits with Chinchilla Rab- bits. Real Moneymakers. Write for facts, 852 Conrad’s Ranch, Denver, Cole. ROOTS AND HERBS HERB Doctor and Medicine Man Book, 10c. (Worth dollars.) Contains over 250 valuable herb medicine recipes for home use. Shawnee, 145 West 112th Street, Chicago. as, “HERB Doctor Book—10 cents. 250 re- ceipts for making herb medicine. Hazzard Comaeee,, Bas 1, Vanderveer Park, Brook- lyn ‘ BENDING MACHINES DOGS AND PETS THE Famous Hossfeld “‘Wrenchless’’ Uni- versal Iron Bender is the last word in bending machines; bends both Pipe and ; to most any conceivable shape. Bends uy 8s, Angles, Rings, Coils, etc. A stately bends anything from a small nail 1 to a 1%-in. pipe cold. Instantly ad- jus ted without a wrench. Thousands in use. Write for descriptive circular and prices. Hossfeld Mfg. Co., Box 344, Winona, Minn. FOR SALE—MISCELLANEOUS POLICE Dogs and Puppies, Sired by Champion. Catalog 5c. Cassius Winkel- man, Wausau, Wis. ae “sal A! BEAUTIFUL Fox Terriers, Collies, Shep- herds. Barnes Farm, Clay Center, Neb. RUSSIAN Wolfhounds, registered. Kan- Yon_ Kennels, w. 8. Fredrich, Arbon, Idaho GERMAN Police pups. Registered stock. Best bloodlines obtainable. N. S. Mum- power, Bristol, Tenn PERSONAL HAIR Grows when our Vacuum Cap ts sed a few minutes daily. 60 days’ free ial. No drugs or electricity. 20 years B. ess Stors falling hair and dandruff. Sooklet free. Modern Vacuum Cap Co., 555 Quincy, Denver, Colo. SPARETIME Employment at home. De- tails stamp. Gluco, 507 Aetna Bidg., Roch- ester, N. Y¥ FREE: roots and herbs. York Valuable book telling the uses of Box 29, Station L, New yp DORESSOGRAPHS._ Letter Folders. fultigraphs, Envelope Sealers, Duplicators, ‘ess than half price. Guaranteed. Pruitt Co.. 117 No. Market, Chicago. __ FOR Sale or Exchange—One ing system. One Violin Internal Course. Snavely, Haxtun, Colo, or Snuff Habit Cured or no pay. $1.50 if cured. Remedy sent on trial. Superba Co., N3. Baltimore, Md “SEND 25c coin and your date of birth for forecast of your vibrations for 1927. Aryel Synclare, Numerologist, Rt. 1, Box 26, Redlands, Calif, TOBACCO SECTION 63 MOST Fascinating Discovery of Modern Science—Key to success and failure. Teaches how to arouse the marvelous four-fifths of you now buried beneath the surface. Shows how to awaken the ‘Real You” and become the amazing, success- ful person you should and can be. Write for Free fascinating book. Desert Pub- lishing Company, Box M-2, Dept. G, Hollywood, California. WONDERFUL health book for only 10c (publisher’s price $1.00). Appreciated by every reader, sick or well. Teaches health the natural way, also suggest reliable self treatment of disease. Address, Author, Box 437, Seattle, Wash. Jehan d TAKE up Visualism and Cultivate your Memory. 6 simple courses give extraordi- nary results. 12 courses make you a Genius. Ist Course $1. 6 Courses $5. 12 Courses $9 only. -- ee Church Institute, Storno- way, Scotla ieanoWitd Nails or any foot ailment corrected. Write, Eaton’s Foot Special- ties, D20, Bandon, Oregon. HIGH Blood Pressure inexpensively over- come, without drugs. address. Dr. Franklin Stokes, Mohawk, Fila, FALSE Teeth Repaired. Missing teeth $2.00 up. Gold teeth $5.00 each. Broken Herlan, 70 West Broad St., plates $2.00. Bethlehem, Pa. DON’T guess. analyzed. Prof. Butte, No. Dak, MISCELLANEOUS MIRRORS Resilvered at Home. Costs less 5 cents per square foot; you charge 75 cents. Immense profits plating auto- parts, reflectors, tableware, stoves, refin- ishing metalware, etc. Outfits furnished. Details free. Write Sprinkle, Plater, 288, Marion, Ind. LOCKSMITHS—Something new. Also buy, sell and exchange codes. a. Locksmith, 1656 Lawrence, ‘olo. Have your character Albert Peterson, Sentinel Write. Free Denver, CASH in on your Artistic Ability. Your home, your office, your spare time, your gold mine. Not a correspondence course. Sam- ple and particulars 10c. Straco, 1013 Mul- berry, Springfield, Ohio. eiaiitilien A PENCIL portrait of your photo. clear phote and $1.10. A. Seamann, 2104 Liberty Ave., Terre Haute, Inc. MEXICAN-MADE pistol holsters, car- tridge belts, lariats; hand-carved belts and holsters; horse-hair belts, hat bands, fobs; rattlesnake belts, fobs. Tex-Mex Leather Co., 309 | Esperson Bldg., Houston, Tex. WEEDS—Cut them with cutter bar on Shaw Garden Tractor. Also plows, culti- vates and runs belt machinery. Low prices. Immediate delivery. Shaw Manufacturing Company, Department C, Galesburg, Kans. CUTS anybody can make. Simple, cheap process. $1. Specimens, particulars. 2c stamp. M. Day, W Windfall, Ind Send HOMEOPATHIC and Biochemic prepara- tions sent postpaid to all parts of the world. Mansel ae booklets free. Halsey Bros. Co., Clair St., Chicago, Ill. Established 1 ARTIFIC TAL Eyes Booklet free ver Optic, 559 Quincy, Denver, Colo TATTOOING Supplies Direct from Man- ufacturer. ‘‘Waters,”” 965 Puttnam, De- troit. = = 6 a GENUINE Scout Knife $1.50 24-inch blade, can opener, bottle opener, punch, screw driver. Best knife for mechanics, hunters, fishermen, farmers. Buskett, Jop- lin, Mo. fo = AMATEUR Cartoonists: Make in spare time with new cartoon plan Write Smith's Service, Wenatchee, Wash. NATIONAL Fun Review one year and 12 postcard views, 25c. Sample, 5a Sadny, 299 Willis Ave., New York. _ TATTOOING—Learn how with my out- fits. Descriptive circulars sent anywhere. Sorat Bonzey, 367 South Main, Providence, if e. Den- money selling PM1194, CASH paid for butterflies, insects See Sinclair Display Advertisement on page 32 TELL an army of 3,000,000 live readers all about your offer! If you have any- thing to sell, buy or exchange, or if you have any reasonable proposition, tell our readers all about it—they’ll respond quickly Our booklet “‘How to Create More Business’’ contains some very in- teresting, helpful facts. Write today for your copy—it’s free. M. L. Rund, Man- ager Classified Advertising, Popular Me- chanics Magazine, 200 E. Ontario St., Chicago, IIL

Page 244

Slingerland MAYBELL BANJOS Qevthy, oe HEY have that pleasing penetrating tone that musicians have been ask- ingfor. Quality Banjos attheright price. We will give a ten dollar trade coupon To apply as part pay- ment on any Tenor See and try one at your dealer’s and you will have no other POPULAR MECHANICS ADVERTISING SECTION A'T1b.1002 lies ra) cxout a worth 1 ment q ofeat mB = —,* $280 worth of outdoor equip- ment will be given for the Six Largest me ae Trout caught in 1927 and entered in the Bight ish Contest Conducted by America’s leading magazine for the Out- doorsman. Complete details > the current issue. Get copy from newsstand or send $1 for 5 months’ trial sub- scription to Desk C, 41 W. 45th St., New York, N, Y. FIELD & STREAM For 16 years, these contests have been to the angler what the National Field Trials are to the dog lover. Record fish listed in World Almanac. With 82 prizes covering 15 classes of game fish, many prizes will be won this year by fish of no great size. Free and open toall. Winners select their own prizes. —_— Field & Stream has over 50,000 feet of the finest motion pictures of hunting and fishing ever made, obtainable on terms amounting to FREE LOAN. The best entertainment for ban- quets, smokers or other meetings of clubs and associations of every kind, or private entertain- ments. Write for full particulars. Learn 3i$".., Lettering Fascinating work. Pays $50 to $200 weekly. Vas gets $25 for a sho-c . Some posters bring $300 Ma v earn while learning. Study in spare time. Learn quik oy facts and ues write: DETROIT SCHOOL LETTERIN 173 Stimson, Detroit, Michigan. HERE AT LAST— A Home Study Course in Sige Paint- ing—Decorating—Show Card Writ- ing Grainin arblin ‘gone y MOVIN SPIOTORES. evs, ou a ving Pic a, ne for R . . your own ia | ang our course. rite for full particulars National Painters and Decorators Ass’n School Dept.3 435 N. Clark St., Chicago, Miinois _—— Banjo to anyone finding a town or city that does not have a dealer selling Slingerland Maybell Banjos. Write for free illustrated catalogue Slingerland Banjo Mfg. Co. World’s Largest Makers of Banjos and Banjo Ukuleles 1815 Orchard St. Dept. 12 Chicago, IIl. Improve yd ~ personal appearance by ‘oe the new atent “ Lim-Straitner,’ PrModel 18. Corrects now ow and Knock-kneed legs safely, quickly and } permanently at home. No costly operation or dis comfort. Is worn at night. Easy to adjust; its result will save you soon from further humiliation and will improve your personal appearance 100 per cent. Write today for copyrighted Physiological and Anatomics! [/ book and experience of others without obligation. Enclose a diz J M. TRILETY, Specialist emenitiven, 7 ¥. “B Se The bigg eulo s¢ catalog high your cof sendthec The de spent autorey mounti million year —( ers have the t A. ¢ The ©

Page 245

.d quip- Six in the Out- , Get | sub- + .M » been Field tecord With Lame n this ij ree t their POPULAR MECHANICS ADVERTISING SECTION The biggest auto school catalog—1 9" high—get your copy sendthecoupon The dollars spent for autorepairs are mounting by millions every year (Car own- ers ha pay out all the t it’s $15 here ¥) there. 22 rs running every one s to be re- larly. You now on this bigger growing Make big mon- vy weeks’ Detroit this world’s fa- school will start you This great school, by auto factories, has ds of men.on easy street Pup yn above for particulars, ited 16th Anniversary YOU dhe. 3 to get your hands dirty. Auto 1 have steady work. Garage whers. wi int men who know how to do os right. They're willing to pay well togetthem. Car owners are getting more particular all the time,—won’'t trust their cars to any but traimed men. Here in Detri it the auto center you learn right, a the Id reliable “‘Michigan State."’ Here 1 have new cars to study on,— ctual equipment supplied to us by auto T Expert instructors teach you letail. You learn with tools. You i training too. The knowledge mn your head guides: the skill we ir hands. Aviation — Another Coming World Business As a money-making business, aviation will soon rival the auto industry. Skilled men are needed in this new industry even now. Look to the future, lay your plans now to be one of the leaders,—the time is ripe. Business Course Included So you can run your own shop, we teach you thoroughly business methods, stock- keeping, systems, banking. A _ leading business man of Detroit teaches this course. No extra cost. This is just another one of the big advant ages of learning at “‘ Michigan State.’ ite trol Seno aicl ra MS “4 _" Sains: OS - en oe yer yak ~ howe Te — es ee oa ore ey tr od ~ wey yom? and So coins We have morecalls for trained men than we can fill We can train you quick to make big money Learn a trade that is good the year round. Become a trained auto repairman, welder or machinist Auto repairing has jumped to a tremen- dous world-wide business Be trained to get part of this fortune Wonderful opportunities for jobs or to open a shop of your own CAN GET THERE UICK Home Study Course If you cannot come to Detroit now, start by learning at home. Our home study course is taught by the same in- structors who teach our resident course This will enable you to get a job or will be the foundation for your practical course if you can come here later Send for the Big Book The big auto school catalog,—19* x 12” The day you get it will be your luckiest day. MICHIGAN STATE AUTOMOBILE SCHOOL A. G. ZELLER, President and General Manager The Old Reliable School —Established 17 years 306 Auto Bidg., DETROIT, MICH, mf

Page 246

65 POPULAR MECHANICS ADVERTISING SECTION IMPROVE 7 Loaner 5 Authentic Texts, Self-Teaching, Self-E ¢ Educative, instructive, Cultura'—Little Blue Books, Pocket Size, 15,000 words per Voi Your ch Sc per book. ORDER BY NUMBER 1251 Question and Answer 749 Camping a Games 0 Hints for Hikers 112 Secret of Self-Devel- 1498 How to Dress on Small opment alary 7 A Liberal Education. 1092 Beauty Hints 897 How to Enjoy Reading 1005 Enjoying the Orchestra 868 Self-Improvement 984 Harmony Self-Taught 821 How to Improve Your 414 Art of Happiness Vocabulary 651 Psycho Analyzing Your- 697 Words often Mispro- self nounced 217 Puzzle of Personality 696 How to Pronounce 1052 Instincts & Emotions Proper Names 417 Nature of Dreams 1003 How to Think 1069 Conquest of Fear 367 How to Improve Your 761 Food and Diet Conversation. 1126 Eating for Health 435 100 Best Books 98 How to Love 1097 Memory Improvement 997 Home Cooking 1049 How to Sing 877 French Cooking 995 How to Play the Piano 1180 Cooking Fish & Meats 859 How to Enjoy Music 685 Interior Decoration 556 Hints on Etiquette 1032 Home Gardening 82 Common Faults in 1070 Fighting Nervous Writing English Troubles 855 How to Write Letters 4 Typewriting Manual 68: 734 Useful Phrases Mouth Hygiene 639 Most Essential Words 811 Genetics (Heredity) 364 How to Argue 189 Eugenics Explained 681 Spelling Self-Taught 709 Sociology Facts 682 Grammar Self-Taught 405 Economics Outlined 683 Punctuation Guide 467 Evolution Explained 822 Rhetoric Self-Taught 419 Nature of Life 823 Composition Manual 815 Familiar Quotations 902 Foreign Words 1065 Lives of Presidents 856-857 Arithmetic Self- 847 Card Games Taught (2 vols.) 1103 Puzzle Book 1004 How to Save Money 78 Public Speaking 1074 Commercial Law 192 Book of Synonyms 998 How to Make Money in 1185 All About Weather Wall Street 1231 Best 1926 Jokes 1189 How to Make Money at 1089 Sex Common Sense Home 773 Good Habits 629 Legal Forms 86 How to Read 835 Useful Tables 1109 Spanish Self-Taught 986 How to Talk & Debate 1208 Success Easier Than 75 Choice of Books Failure 679 All About Chemistry 830 Crossword Puzzles 994 All About Physics 499 Classical Dictionary 895 Astronomy Manual 905 Biblical Allusions 725 All About Zoology 1174 Business Letters 703 All About Physiology 893 500 Riddles 491 Beginners’ Psychology 74 Sex Life 710 All About Botany 167 Health Rules 1139 Photography Manual 342 News Reporting 1064 Radio Manual 708 Romance of Words 1230 Radio Stations 56 American Slang 1023 Popular Recitations 1186 Rules of Golf 1031 Owning Your Home 466 Sculpture Guide 853 Guide to Songbirds 468 Architecture Guide GREAT BARGAIN! Your choice, any book in above list, Sc per copy, plus tc per book for carriage charges (otherwise your order will be shipped express col- fect). Canadian and foreign price 7c per book. Haldeman-Julius Publications anasto tin. TELEGRAPH-RADIO $18 to $35 a week while training for Radio and Telegraph Operator jobs at $150 to $300 per month. Write for particulars. +. vacmed TELEGS AEE INSTITUTE 338 S. Michigan Avenue, CHICAGO in Aviation jobs. Learn under act- ual flying conditions in 30 lessons. Send for FREE BOOKLET about Avia- tion and the opportunities in it for you. concase AERONAUTICAL SERVICE, INC. Dept. B 608 S. Dearborn St. Chicago, Ill. RAILWAY = POSTAL $1900 to $2700 a year cations with pay. Work easy. lo rose on fast trains with allexpenscs ag a cluding rv TR No worries about the future FREE BOOK TELLS HOW Get my a free book about the Civil Ser. vice which tells all about the Railway Postal Service, and other maitene, ond how I can help you. Write t PATTERSON SCHOOL Arthur R. Patterson, Civil Service Expert 86 Wisner Bidg. Rochester, N. Y. » "Specialist Learn my amazingly successful system—right at home—in yourspare time. Let me train you for rea! success. Let me put you in touch with big business. Let me do for you what I have done for other wide-awake men and women. D. H. Garrett says: “Made $630 in one week before I was half through your training.”” Mrs. A. Moore says: “‘Have a new car, a dandy office and money in the bank, a through my own efforts and without any capital to start with M I. Stokes says: ‘‘Made $900 in three months in my spare time.” Send your name and address at once for my new, free book, “ Ho Become a Real Estate Specialist,”’ giving full facts about my rem ‘ able Home-Study Course, my Free Business Service and positive proof of big success. Address, DIRECTOR, Dept. 44 fF. | American Business Builders, Inc., 18 East 18 Street, New York. KIN-TROUBLES ANDRE’S ACNE CREAM is Excellent for ail Skin Troubles no matter how severe or chronic. Pimples, Blackheads, Eruptions on face or body. Eczema, Barbers’ Itch, Scales, Crusts, Pustules. Enlarged Pores, Oily ,Shiny or Itching Skin. Lightens Freckles, softens and whitens the skin. Immediate Results. Write for full particulars Andre & Co..4029 Cottage Grove Av. Suite 451, Chicago, Illi. Save Y¥ When all else fails, end your suffering with the Heefner Arch Support No Metal Fully patented. Itre-adjuste the A oma foot. Write for free book and statements from doctors and users. Heefner Arch SupportCo. 652 M. E. Taylor Bldg. _Lowisville, Ky Complete course of Hypnotiom. Mind Reading and Magnetic Healing, 25 faseinat ing lessons. How come an expert, hypnotize at a glance, make others obey — wishes, overcome pes habits and enemies, gain in power, wealt! lo we ape. easy system. s $20 course: now on = $1. Rend stamps, cas No more to pay DUCATOR PRESS, 19 Park Row, New York, Dest. n DO YOU LIKE TO DRAW? it’s Easy To Learn When Shown In The Right Way Some of cleverest cartoonists and comic artists in America today learned how to draw quickly—by following CARTOONIST EVANS’ SIMPLE AND EASY METHOD. This school is recommended by foremost cartoonists because they know the students are handled right. If you like to draw, send 6c in stamps for portfolio of cartoons and full details. The course is NOT EXPENSIVE. The W. L. Evans School of Cartooning °'.t2,.2°0% CLEVELAND, OHIO HORM 180 No: Send Endocr

Page 247

t rspare nubles uptions istules, softens iculars go. Ill. . y POPULAR MECHANICS air Commerce Needs Mien! Don't envy the Highly Paid Air Man—Be One! Air Men are ‘1 demand, Beat the other fellow to the HighSalaried Jobs tion. Western training will qualify enter Aviation. Learn how through log, sent on request. Write for Free Catalog “Airplanes and Flying”’ {eronautical Training Division WESTERN AIRPLANE CORPORATION Dept.M-6 Monadnock Block Chicago, ti. ENCYCLOPADIA BRITANNICA in the New Form—at a saving of 40% Write for full details. Address Dept. PM5 THE ENCYCLOPAEDIA BRITANNICA, Inc. 342 Madison Ave., New York City DRAW CARIQNS Turn Your Talent Into Money Cartoonists earn from $50 to $300 per week— 8 en more. Remarkable new Circle Sys- tem of Drawing teaches you in half the usual time Send for booklet and sample lesson plate explaining full details of the Course. THE NATIONAL SCHOOL OF CARTOONING 623 Penton Buildin Cleveland, Ohio FOUND A New Fountain of YOUTH! Now a way has been found te rejuvenate every cell in the bo One of America’s leading doctors and surgeons—one of ers in discovering the fact that the 12 endocrine glands tality, vigor, youth—recently discovered a means of glands that is producing amazing results with both ind women. If you feel run down, tired, wornout—lack nergy and vigor that compels accomplishment—the vital that makes the womanly woman and the manly man— will be astonished with the results even a few days’ use s new gland food produces. FREE TRIAL OFFER w discovery revitalizes the Jglands, rebuilds blood, brain, all tissues of the body. Ailments caused by an impaired are quickly corrected. The rapidity with which it works lible to one who has not tried it. This discovery is being ' | by medical practitioners generally—because it does what .) Grug known to medical science will do—and does it quickly ' you would be fully alive—if you want to enjoy life to the fullmost ‘write today for complete evidence and fuil particulars of the PREE t TRIAL offer we are making for a limited time. Mail the coupon below—NOW! Please print name plainly FREE TRIAL COUPON HORMOCINE LABORATORIES, Dept. 2 180 North Michigan Ave., CHICAGO, ILL. me e by return mail, in plain envelope, full particulars of your e Discovery and Free Trial Offer. I ADVERTISING SECTION WHEN YOU joy Popularity Popularity can be yours. We start you by presenting this handsome, full size professional tenor banjo. We want to present one of these wonderful, delightful instruments to each of 1,000 readers of this magazine. We want every music-lover to attain success and this offer is made to pave the way. No previous musical knowledge is necessary. Under personal supervision you will be given, by mail, the Genes $f Prof. Harry Six's 22 Foy) as director o —— and netramental Clubs of University. Our method is different because so easy and simple. Learn in 30 Minutes With My Picture Method We furnish pictures and, as an addi- tional guide phonograph records of the professor playing the pieces you are learning along with our thorough, printed and illustrated, easy- -to-learn course. It is easy. If you could sit at our desk and see letters from stu- dents, you would be convinced that we have perfected this simple course to insure your mastering tenor banjo. Don't Send a Single Cent Investigate today. pat off until tomorrow, ause you might forget. It might be =e — a pint in m your career. Don't A a single cent. Just dr lin coupon, or postal card will do—telling you are interested in receiving fuil particulars about course, and to reserve one regular eighteen dollar, full size professional tenor banjo for you, which is given you when you enroll. Act Now! New York Academy of Music Studio 106, 100 Fifth Avenue, New Yo Ple ease rush all freeinformation relative to your Tenor Banjo irae, sample lesson and re e ft tenor bar for r io cbltantes mo ia no e

Page 248

POPULAR MECHANICS ADVERTISING SECTION No Joke to be Bald Rupture re, Vanished |= in2 Seconds In a flash I knew that at last science had given to rupture victims real, quick, positive relief. I knew that through the discovery of a well-known American Scien- tist my rupture suffering was over. Tiny Magic Dot a Rupture Wonder N extraordinary little device, weighing less than 1-25 of an ounce, now makes heavy, cumbersome, old-fashioned de- vices, cruel springs, heavy straps and pads unnecessary. This new invention is called ‘‘Magic Dot,” and by its usc it is now possible to walk, run, jump, exercise, bend, etc., with perfect security—without cruel pressure or barbarously tight strapping. At last, here is a way to prevent coming down of rupture, and tiny Magic Dot is only a part of the wonderful New Science System. A Breathes Air A wonderful new pad, light in weight, soft and pliable actually breathes air. Smaller, much smaller, than you ever thought pos- sible. It fits the contour of the body as no old-fashioned pad could do. It is washable, sanitary. FREE Sample The pad is made of an amazing new material called Airtex and a sample will be mailed absolutely free to those who ask for it. hese two items are only a part of this new system for sup- porting and healing rupture that is said by doctors and rupture victims alike to be a thousand years ahead of all other methods. “See It First” We could never tell you all of the remarkable features of this modern, scientific rupture relief, but without risk on your part you can see it in your own home. Send no money. You can easily get full particulars and free illustrated material. Merely clip coupon, write your name and address plainly and mail it to NEW SCIENCE INSTITUTE 2137 Clay Street Steubenville, Ohio, U.S. A. NEW SCIENCE INSTITUTE 2137 Clay St., Steubenville, Ohio Please send me at once full details of the New Science System and your “See it First” offer. I am not obligated. plished mare head, pictured above, I of age and loss of hair a aan ast ty om gre under 45 years . I must succeed or Fed home treatment is simple, So, Solel ons ee and address and I will mail with PHOTOGRAPHS, eer Perfect hearing is now being re- stored in ali cases of deafness caused by Catarrhal troubles, Relaxed or Sunken Drums, Thickened Drums, Roaring or Hissing Sounds, Perforated, W holiy or Partially Des- troyed Drums, Discharge from the E. Ars, etc. Wilson Common-Sense Ear Drums re ye ow no medicine but effectively replace what is lacking or efective in the natural ear drums. They are simple devices, om the wearer easily fits into the ears where they are invisible Soft, safe and comfortable. Write today for i68- book deaf Free Book full pare eulars and man y vestimonials e earing ousan ft ateful on Deafness | users ‘has ‘been restored by these “Mitle wtreless phones for the ears.” WILSON EAR DRUM CO.., incorporated 619 Todd Building LOUISVILLE, KY. proportions— while you sleep! ANITA NOSE ADJUSTER is ot lye painless, comfortable. Speed Tmanent results guar- antee tors praise it. No Gold Meda} Metal to harm you. Small cost. Won 1928 §=6Write for FREE BOOKLET 8 Font -aritr ANITA CO.., Devt. F-12 ANITA Bidg., NEWARK, N. J. STOP USING ATRUSS STUART’S PLAPAO-PADS are different from the truss, being me- chanico-cheinico applicators made self-adhesive purposely to hold the distended muscles securely in place. No straps, buckles or spring attached—cannot slip, so cannot chafe or press against the pubic bone. Thousands have suc- — peseten Sees - ome without hindrance from work Pw ye —most obstinate cases conquered. Grand Prix Soft as velvet—easy to apply— inexpensive. Awarded Gold Medal and Grand Prix Process of recovery ——" a eerunes no surthes — for trus We prove it y sending Trial o apao absolutely Write name on Coupon and send TODAY FREE PLAPAO CO., 733 Stuart Bidg., St. Louis, Mo. Return mail will bring Free Trial Plapao. toba

Page 249

POPULAR MECHANICS ADVERTISING SECTION 69 » Tobacco Is Hurting You Look at the facts square in the face, Mr. Tobacco User. You may think tobacco is not hurting you. mag F 'hat is because you haven’t as yet, perhaps, felt the effects of the nicotine poison in YOUR system. For you know that nicotine, as absorbed into the system through smoking and chew- ing tobacco, is a slow working poison. Slow, yes—but sure. Tobacco is lowering your efficiency. It When your hands begin to tremble— AUTe « } and your appeti Zins ali— slows a mandown. Makes it harder for you 54 Jour heart seems to “skip n beat” now and then— to concentrate your mind on your work. You andslight exertion makes you short of breath— haven’t near the amount of ‘“pep’’ andenergy _then you have a right to suspect that sain wilh : " s ae TOBACCO is getting the upper hand. you W ould have if you stopped using it. The res Any well-informed doctor will tell you that these are many a man twice as old as you in years who's twice as only a few of many symptoms of tobacco poisoning. young in energy, simply because he lets tobacco alone. And YOU know that the use of tobacco in any form Some day you will realize to what an alarming extent is an expensive, utterly useless habit. You know you tobacco has undermined your system, ought to quit. Tobacco Habit Banished Let Us Help You It doesn’t make a particle of difference whether you’ve been a user of tobacco for a single month or 50 years, or how much you use, or in what form you use it— whether you smoke cigars, cigarettes, pipe, chew plug or fine cut or use snuff— Tobacco Redeemer will positively remove 4ll craving for tobacco in any formin a very fewdays. Not the slightest shock to the nervous system. Your tobacco craving will usually begin to decrease after the very first dose—there’s no long waiting for results. : é Tobacco Redeemer contains no habit-forming drugs of any kind and is j marvelously quick, scientific and thoroughly reliable. f It is in no sense a substitute for tobacco. After finishing — the treatment you have absolutely no desire to use tobacco again Sh a bree Book Coupon Results Guaranteed $0060: ecu Sinaine, NEWELL PHARMACAL CO. s money-back guarantee goes with each full treatment. We will refund every cent you pay for the Dept. 300 Clayton Station St. Louis, Mo, Please send, without obligating me in any way, treatment if after taking it according to the easy-to-follow directions, it should fail to banish the tobacco habit completely. 1 your free booklet regarding the tobacco habit and roof that Tob Red will positively free me Let us send you our free booklet on SEND Coupon for the deadly effects of eee, to- Free Proof ———— Gecanene tation a rom the tobacco habitor my money will be refunded. they have been absolutely freed from the tobacco habit by this simple home treatment. You could not ask for stronger proof that Tobacco Redeemer will free you from the habit than the evidence we will gladly Name cisiatibingnialiunnananneiiiinniatainae ———s #eDd oc request. Just mail the coupon—or a postal will do. NEWELL PHARMACAL CO. SEALE: AEE Dept. 300 Clayton Station St. Louis, Mo. ee eG iccsorerencteeeemmmeseenee a

Page 250

‘POPULAR MECHANICS ADVERTISING SECTION Learn LOS ANGELES * emma enge own ee, tnnanenety ee ad FREE Employment Service! There are more calls for “ National-Trained-Elec- trical-Men” than we can supply. Jobs are open now paying $50 to $200 a week—but you must first get the right training. Get it at National—a world- famous institution with a quarter century record of success in training big pay men. All These Advantages: Unlimited Training Until Competent. . Free Employment and Welfare Service. . Million Dollar Training Shops. Personal, individual training guaranteed. 5. You tai? | perform wor that employers ay big money or. Official Diploma and certified record of work performed. FREE Read how National in- : FE my ty appeeee. eos This Big ree ‘or this free Electrical cat- Book Shows You alog— illustrated by actual - photos of students training How to ickly under instructors on a half Make BIG PAY million dollars’ worth of new Hi E rr | Electrivity- YOUR Opportunity! electrical equipment. Mail coupon now, p--—-x-s-------------- ational Electrical School | | | | | Dept. 507, 4006 Figueroa St., I Los Angeles, California. | ! | l Send me your big free illustrated catalog of Electrical Op- portunities. Name Address I city State For . Vacation Time Reading Let us send you a list of books that are 100% entertaining Beau Geste—Old Ironsides—The Nervous Wreck— One Minute to Play—Stories by Zane Grey, James Curwood, Peter Kyne, Sabatini, Burroughs, dna Ferber, Gene Stratton Porter, Mary Roberts Rine- hart and many others. We have inaugurated a convenient book ordering servic; for our readers. Simply drop us a line requesting t! send you a list of the latest and best books fou will receive by return mail and from time to time thereafte; attractive lists and announcements of the newest and m, worth while books, the majority of which will be popular 75 cent editions. You will be placed under no obligation whatsoever. Th service is to enable you to select from the works of favorite authors and to keep you informed about the 1 big things that come out practically as soon as th lisher’s announcements are made. Books ordered will be delivered to your door advance over the publishers’ prices except that you wi asked to pay the postage. Send us your name and address today—now—t« the benefit of this new service. Address: POPULAR MECHANICS PRESS 200 East Ontario Street, CHICAGO lat we in the Oe What Do You Do When You Cannot Find the Book You Want: 1 Don’t give up in despair. Send for a copy of the H unique catalog published by Popular Mechanics } Press, It contains 5000 books listed alphabetically |] 1 under 2000 main subjects and sub-headings — \iterally from A to Z—Abrasives Manufacture to Zoologist and everything in between. FREE UPON REQUEST Send for your copy today POPULAR MECHANICS PRESS 4 200 E. Ontario Street, CHICAGO | | | ll (a Practical Plans for Tourists 133 practical plans for making automobile touring easier, less expensive and more enjoyable. These include: Camp Equipment; Stoves and Campfires; Com- ete Homes on Wheels; Beds for Car and Camp uggage Carriers; Tables for Car and Camp xes; Making Tents; Improving Tents Radio Receivers; Repairing Tires Handling Tire Chains and Getting Out of Mud qaceving Food; Making Camp Without Tents ame, king; Making Chairs and Stools Car epairs; oads and Landmarks: Miscel laneous. With the Auto Tourists’ Handbook we supply a 7 Atlas of the U. S., showing Road maps of every stat« distances, logs of national trails and other authentic information. Just write us to send you these books and when p hands you the package pay him 98 cents plus the postage. '' side U. 8. remit with order and include 15 cents extra for po POPULAR MECHANICS PRESS Room 606 200 E. Ontario St. CHICAGO

Page 251

tr ” N | } I > =~ nics cally ogist w w 1 1 I 1 I 1 I i] I ] i] ] i 1 = POPULAR MECHANICS ADVERTISING SECTION —_—_—-- | Lathe Handbook. POPULAR 200 E. Ontario St. 259 Kinks furnished by 106 of the most successful Lathe Operators are found in our 212 Illustrations...........000. Price 50c These three books (regular $1.50 value) are offered for a limited time only for 98 cents plusthe postage. Pay postman when he delivers the package. If outside U.S. send remittance and include 15 cents extra for postage. MECHANICS PRESS Room 604 Time, Labor and Money Saving Ideas for Auto Repairmen 334 Valuable Discoveries made by Hundreds of Auto Mechanics are con- tained inour Automobile Repairman’s Handbook. 337 Ilustrations...... Price 50c 301 Ways to use drills, drill presses, taps and dies with more effective- ness are given in our Drilling and Thread Cutting Handbook. 298 Illustrations......Price 50c CHICAGO cAGO Wait Just a Moment, Mr.! Before You Light That Cigarette, Cigar or Pipe—Or Take a Chew of Tobacco— REMEMBER THIS: That no man can escape the bad effects Its active principal—nico- potson which, in ie, is simply bound to injure your health—perhaps seriously. Most tobacco users realize this But when they try to quit unaided they find it next to impossible be- cause of the almost unbreakable hold of tobacco. tine—is a deadly the habit has on them. to quit with the aid of the liquor, Q lickly effects. Dept. P. M.-6 ! \ iyself of the tobacco habit. Vame Thousands of inveterate tobacco users have found it easy Keeley Home Treatment For the Tobacco Habit A sane, scientific Treatment based on the prescription of Dr. Keeley, who founded the famous Keeley Institute for and tobacco addicts more than 50 years ago. completely banishes all craving for tobacco in «ny form. Contains no habit-forming drugs. No bad after- Not a tobacco substitute. A wonderful tonic. Im- proves appetite and digestion. Money - Back Guarantee 11. after taking this to directions you can honestly say you have not been bene- fited, we will refund your money. MAIL for FREE BOOK which gives eflects of po cohen “y facts onene =. — Piece acco an 8s how easy it to quit with the ald of this remarkable treatment. d . THE KEELEY INSTITUTE ees St ream ee I | The Keeley Institute, Dept. P.M.-6, Dwight, Ill. Send without obligation your free booklet telling how to rid Treatment according DWIGHT, ILL. — FONE. catkins siwedxas L ENGINEERING, ELECTRICITY and ARCHITECTURE CHICAGO TECHNICAL COLLEGE One of “America’s oldest and largest schools of specialized en- gineering” offers you a maximum of practical training in a minimum of time, here at Chicago, the country’s building and engineering center. Technical training of college standard for men who have neither the time, money nor prelim- inary education to attend a university. Each year more than 1000 men and women enroll in day and evening classes. Short, Intensive Training practical in every respect, puts you quickly into a high salaried position. Many of our students are assisted to responsible positions before graduation they earn while they learn. ey learn COURSES are arranged InSpareTime| tosuit your needs—2 year At Home diploma; 3 year B. S. If you can’t to degree; special 3 and 4 months’ short courses adapted to the individual. Expert instructors active- ly at work in the very professions they teach. Tuition low, terms easy. Enter any time. Day and Evening Classes. Write for FREE 84 Page Blue Book It tells about all the courses . . . fully de- scribes them; about the great demand for Chicago Technical College trained men; about college athletics and other interesting facts you'll want to know. Gives you a vivid picture of what you may expect at this lead- ing technical college. There is no obligation. Send for this free Blue Book today ... now! Address Registrar G-75 time is enc i. e practical course .Quick, easy—yet thorough. Trial Lesson FREE Test yourself and see Address Dept. G-200

Page 252

POPULAR MECHANICS

Por a limited time and to get QUICK ACTION we offer this genuine $7 over-size GREEN JADE fountain pen without cost. Because we want you to BORROW these pay-raising Auto books NOW—not “tomorrow "—because we want you to know how they help men i to better jobe—quick! Auto Engineering LIBRARY LOANED

FREE! Even the one chapter on IGNITION may double your pay. And in the Fiv E volumes, 2420 pages, over 3000 wiring jagrames, charts and illustrations thereare ALL the facts about every branch of auto work you'll ever need—right at your finger tips of priceless benefit to mechanics, garagemen, Joremen, auto owners. Get in on this great opportunity ow. Send no money, just mail the coupon American Technical Society Send No Money No C. O. D. American Technical Society, Dept. A-A19, Chicago

I want to borrow FREE for 15 days use, a brand-new set of “AUTO ENGINEERING,” the latest 5 volume edition. I will pay the few cents express charges when books are delivered, but not one penny for the use of the library itself In return for this, I agree to look them over very carefully and determine for myself if I wish to keep them. If I do, I will pay you $2.00 after 15 days and you will then send me the 87 Fountain Pen absolutely without extra cost. The baiance ofyour special advertising price $24.80 I will say at the rate of $3.00 per month If not wanted,

will return express collect, and owe you nothing 3 Free Features 1. Home-Study guid- ance FREE 2. Membership in So ciety — oe year's consultation FREE 3. FREE Employment Service Name .. Address Attach and addresses, or

rite same plainly in margin. ADVERTISING

to each cable EVELOP your muscles this quick way. Get big broad shoulders. Fill out your chest. Be- come the strongest man in your town by using the famous GIBRAL- TAR EXERCISER— the strongest tensioned apparatus made! Many famous athletes and strong men use it. Can be adjusted to from 10 Ibs. to 200 Ibe. resistance ve man, woman and child should have one. Made e of finest quality genuine para rubber elastic cables Guaranteed 50 rubber strands Do not compare this apparatus with cheap imitations We have made arrangements with a prominent author and publisher, who ie an authority on physical culture, to present you with 16 complete booklets on every subject pertaining to your muscles and organs It is only by special arrangement and additionalexpenseto us that we are able to offer you this wonderfu! premium ABSOLUTELY FREE OF CHARGE with each exe'ciser. 10 ONLY = 35 SEND NO MONEY) All 16 booklets will be shipped free to your home with the ex- « F erviser, and you simply pay the _— ! postman the price of the exer- R be ciser, plus a few cents postage. When emem r. ordering, mention that you want a ‘ . five cabled or ten cabled exerciser The name If you live outside the U. 8. send eash with order For 5 Cables Gibraltar on erling on silver eee rrr GIBRALTAR EXERCISER COMPANY Dept. 306, 225 W. 34th St., New York City Please.send me your fe — EXERCISER. 5 cable It is understood that I am to get the 16 booklets on the body absolutely free with this order. NAME ADDRESS CITY.. an Exerciser means as much as SECTION No Wonder Agents Make Such Big Money Now—nomatterhow many nails you driveintoa tire, it won’t puncture— can’tleak a bit of air! Magic new discovery seals all punctures while —— leaks and valve leaks, A too imply astonishing! ee A ates. is vitally . on sight. ents are simply coinin money showing AIR-STOP to friends and motorists! A. Otis made $157 in 2 days. J.H. Rosen made $22.95 in 11 hours. Right now we offer to send you no-cost SAMPLES at our risk and gen- erous proposition. Test them FRE} Drop a postal for details. Do it now! AIR — MF Gc. CO Des Moines, tows G-526 Hewitt

Make your dreamscome true! Increase your income. Better your position. Restore the joy of living and doing. Tear yourself free from the fetters of the past. Strike for a new and brighter future! Membership with us shows you how. Full information on request. No obliga- tion. It’s free. Just write your name and ad- dress on a postal and send to us. NOW! Self improvement League of America Suite 701, 75 W dA . Bost Mass. Be a drummer! Trap Drumming made easy in a short time. Our free instruction course fur- nished with genuine Ludwig Trap- Drum Outfit. Develop your natural sense of rhythm. Go to your nearest dealer write for full details. LUDWIG & LUDWIG, 1611 North Lincoin Street, Chicago Cows7 5 "Radio sets* Join the Association! We train you to build and repair radio sets—start you in business—enable you to earn $3 hour upwards. l . Free 5-Tube Radio Set to Members. Write for special limited-time plan whereby your member: ship need not cost youa cent. Write today! RADIO ASSOCIATION OF AMERICA Dept. PM-6 4513 Ravenswood Ave., Chicago, I!! prizes in you BOYS spare tim<¢ Write Me Today Jim Thayer, Dept. 26, “sitincneie one

You can money and wi! earl

No one can deceive COMET MAGIC CARDS anybody's exact age, date of birth, lucky d of bank account Answers many questions un for everybody Very useful. Get your f 32 page FREE—If You Send Now 22.,.°*«".. person's character by year, month, and day bor: how to be popular, successful in Accurate. Send dollar bill for COMET M and get “ Planetary Calculator” FREE not satisfied. Agents War ted international Printers, 2110 S. Halsted St., Chicas Money

Page 253

FORD 40 Miles on a Gallon We have tried them out. Ford got 40 miles on a gal- I Carroll STUDEBAKER Saves 50% F. A. Cole writes he put one on a Studebaker Special Six Reports a saving of 50% in gasolit BUICK 36 Miles On 114, Gallons “Yesterday I made a trip of 4% miles and used only 1} r L g L. Robinson. CHEVROLET 43 Miles On a Gallon We have tried them out. Chevrolet got 43 miles.”— k Carroll. Rex Dean, an- other Chevrolet owner, re- ports he got 25 miles a gallon. Took the device off and mile- age dropped to 19 Put it back and mileage moved up to 25 OLDSMOBILE Almost Double J.R. Wood writes he increased mileage on his Oldsmobile from 17 miles a gallon to 30 miles a gallon by actual count on 3,000 miles INTERNATIONAL TRUCK Saves 41% i find it better than you recommend it. On the Inter- national Truck we use, we are saving by positive test 41% in eas and our engine uses less oil George Bell Sworn Affidavit 1, L. G. Stransky, Vice Presi- dent J. A. St.ansky Mfg Company, being first duly sworn depose and say that the A. Stransky Mfg. Company have n their files thousands of unsolicited testimonials from Satisied users all over the world Signed, L. G. Stransky, Vice President Ry rib Subsc ed and sworn to be- fore me this 29th day of No- Vember, 1926 igned) Ernest Henegar. Notary Public POPULAR MECHANICS ADVERTISING SECTION 73 ith This Amazing Device I Drove 1300 Miles Without Buying Gasoline No wonder over two million car owners have installed the Stransky Vaporizer. Here’s a remarkable instance of gas-saving (one of many) reported by J. R. Wood of St. Louis. Before installing it, he got only 17 miles on a gallon. On a 3,000 mile test after installing it, he got 30 miles on a gallon. Thus he saved 77 gallons of gas which, at 17 miles a gallon gave him 1300 miles without buying gasoline! Read the inven- tor’s daring no-risk offer to you. $'775 to $200 In a Week If your present job doesn't pay you $75 to $200 in a week, think fast! Full page newspaper ads are being used all over America. Over a mil- lion car owners have installed it al- ready and tractors—even on an aeroplane Thousands of car owners have or- dered direct from the factory be- cause they couldn't find a distrib- utor. Jump in quick and get your share of the cream! on all makes of cars, trucks How It Works The Stransky Vaporizer was in- vented by J. A. Stransky, former candidate for Governor of South Dakota. It is based on a newly-discovered Rush the coupon today ’ scientific engineering principle that has stood The STRANSKY J. A. Stransky Mfg¢. Co., Dept. G-10, Pukwana, S. D. Yes, send me without obligation full details of your no-risk test offer. Also tell me about Saves Gasoline J. A. STRANSKY MFG. CO. Address Dept. G-10 Pukwana, S. D. City se eee. State Resources $500,000.00 Vo if ever has such a money-making thousands of teste by car owners, dealers, farace “eae 7 mechanics and other authorities t has no delicate opportunity been offered distributors—ex- parts to get out of order. There is nothing compli- perienced or otherwise—full time or spare cated about it. You can attach it to your engine in . “hi . abou hree minutes ¢ t needs no further atten- time. Think how fast the money rolls in when 370Ut three minutes and it needs no = Foster could make $137.50 in a week—Fuller, Official tests show that most car owners waste 20 to $104.50 in five days—Cronk $51 in an hour! 30% of their gas by improper combustion. Thou- sands of car owners say that this amazing device has saved them as much as 50%: that it picks up power more quickly, ENDS spark plue and carbon troubles, and works in all weathers or roads. And s« convinced is the inventor that it will prove its story that he makes the fol- lowing no-risk offer. . Mail Coupon Below Over one million car owners have in- stalled the Stransky Vaporizer at the inventor's risk. This coupon will bring you full details of our plan to let you J. A. STRANSKY test this device on your car in the same . . way You will also Former candidate Gov- : " ernor: of South Dakota is learn a definite plan the inventor of this amaz that has helped others WP ing device now installed by earn $75 to $200 ina 4 over a million car owners. week, full or spare will not obligate you. ¢ 4 i——_ time. Your request \ \G } your distributor's money-making plan Name

Page 254

a Your Way to 4 os POPULAR MECHANICS Bring the romantic, enchanting, en- \ trancing and melodious strains of the great instrument of the Hawaiian Is- lands into your soul. Become popular and successful. This short cut method of home instruction enables you to quickly master Hawaiian Guitar so you will play as well as Native Hawaiians. Our staff of Hawaiian instructors have perfected a method of teaching, so simple, that without musical knowledge, you quickly learn to play real music from notes. Staats as learning 2? your B, C’sand it will not be long before ‘ you will play latest Broadway hits. Only four simple motions to learn. You will then play any music, whether it be popular, dance or classical. Almost from first lesson, you play love songs like Aloha 4 . Co help you get started, we furnish with- out extra charge when you enroll as a stu- dent, beautiful, full tone, genuine, $18.00 Hawaiian Guitar. Only 1,000 free instruments given away; if you want to get in on this offer, write for particulars at once—you must act quickly. New Invention— Kno-All-Chart QUICKLY TEACHES YOU HOW TO PLAY The newest invention of our Hawalian instructor, which is exclusively used by us and which we call the : Me “Kno-All-Chart,”’ quickly teaches you how to play and read notes. So simple is this device that any one Can understand it and begin to play immediately. Picture Method Easy We do not depend upon our printed instructions alone for your success as a student, but we also supply you with many pic- tures of our professors’ playing. This enables you to imitate the pictures. Isn't this easy? Phonograph Records Given As an additional guide, we also furnish you with phonograph records of our Hawaiian instructors own playing of the piece you are learning. This practically brings our professors from our studio to your own home and enables you to listen to their playing just as if they were actually in front of you. Genuine $18 Hawaiian Guitar Given Enroll as a student, and secure a beautiful, full tone, genuine $18.00 Hawaiian Guitar. fe also furnish every bit of equipment so it is never necessary for you to spend an extra penny. When you graduate, you get a beautifully en- Graved dipioma and after graduation, we also give you six menths’ free Service and consul- tation. Send for free particulars now.

Popularity and Success forming class to wait for. Start at once and join band wagon of ee and pop- ularity. Do it through Hawaiian Guitar Send for free First Lesson and Book. So positive are we you will become one of our stu- ents, that if you write at once, we will send you free, our first lee son which will enable you to see just what you can expect when you enroll You will also receive our big book of full particulars. Write for your copy and free tesson today. Write at Hawaiian Studio No. 5206 of New York Academy of Music 100 Fifth Ave., New York, N. Y. HAWAIIAN STUDIO No. 5206 of New York Academy of Music 100 Fifth Avenue, New York, N. Y. Please rush your book. “‘How to Learn Hawalian Guitar” and my first free lesson. waiian Guitar for me without extra charge. gates me in no way whatever. _— sl —, Durable. Easy to put on or off. Send for booklet showing photos of men w ith ane withoutthe** PERFECT LEG FORMs " PERFECT SALES co. 140 N. Mayfield Ave. _ Dept. Chicago, mi. *

America’s Standard Radio Text Book Radio Theory and Operating By M. T. LOOMIS President, Loomis Radio College, Washington, D. ( By far the best Radio Text and Reference Book ever produ ‘ed Third Edition—Revised—1927 885 Pages. 700 Illustrations. 5% x 8 Inches Flexibly bound in red craft leather Used by The Department of Commerce U. S. Naval Radio Schools U. 8S. Coast Guard Academy U. S. Signal Corps Leading Radio Schools of U. 8S. and Canada Price $3.50 Postpaid POPULAR MECHANICS PRESS

Room 606, 200 E. Ontario St., CHICAGO

Outdoor Opportunities How to raise rabbits, guinea pigs, milch goats, silver foxes ferrets, white rats, white mice, dogs, cats, pigeons, pheasant bantams, canaries, bees, frogs, mushrooms, ginseng and ¢ seal for profit. Practical 250-page book with 120 illustrat Will be sent C. O. D. yhen postman hands you the package pay him $2 plus the postage. POPULAR MECHANICS PRESS Room 506 200 E. Ontario St. CHICAGO

WANTED — Volume I, Number 1, January 11th, 1902 issue of Popular Mechanics Magazine. Must be int and in at least fair condition. Will pay 50c to $1 for sa: Communicate with Manager, Book Department

Popular Mechanics, 200 E. Ontario St., Chicago, Ill. SCIENCE FINDS NEW DRUGLESS GLAND STIMULANT Science has discovered a new method of applying a positive-nature force. The method is different—a tremendous step forward in regaining prostate gland health. Amazing effects produced in thousands of men, many beyond sixty. “A hundred years ahead of modern medicine,” writes a New York physician. Doctors and osteo- paths are using and prescribing it. No drugs, medicine, massage or violet rays. Absolutely sale Does what Gland Tablets can never do. Direct!) stimulates prostate gland and often restores it to normal size and functioning in six days! Also tones up entire system, usually routs constipation and piles. Bladder weakness and frequent paint urination relieved in most cases. These results are unconditionally guaranteed. Scientist’s FREE Book, “‘Why Many Men Are Old at Forty,” explains these amazing facts. | book is now FREE. No obligation at all. S ask for FREE book. THE ELECTRO-THERMAL CO., 2170 Main St, STEUBENVILLE, 0 Western Address: Suite 21-N, 303 Van Nuys Building, Los Angeles, ‘

WhoO.Ly

Page 255

DOCK. LY ) Should URMs Trousers he high ight and Send for vith and IRMS,’ icago, mi, — duced plying wholly yaining od d icine,” osteo- drugs, ‘ \y Sdit yirec S it to oO tones yn and painft ilts are en \re This he) VILLE, 0 { Auto Owners Mystified By New Device MAKES CARS RUN ON 7% GAS Washington:—Patent has been applied for by an automotive engineer on a device that is stated will ionize the automobile industry. The theory of his invention is that of adding 93% air to 7% gasoline in such way as to create perfect combustion. The device, by actual tests on vari- ous makes of cars, including Fords, Chevrolets, etc., has cut gasoline consumption unbelievably. The Whirlwind Company, 1041 - 361 Winnebago St., Milwaukee, Wisc., is acting as sole distributor for the inventor. They are appointing men in each locality to take care of the enormous demand that is being created. This offers an opportunity e $5000 or more a year. Write them today revolut to mal for full particulars and free sample offer.—Adv. ANT WORK.cn.-? a= $18 to $60 ba yosk RETOUCHING photos. Men women. No or canvassing e teach you and furnish WORKING OUTFIT siven with each en- roliment. Limited offer. Write todey Artcratt Studios. Dept. 50. 3900 Sheridan Rd.. Chicago BUCHSTEIN’S FIBRE LIMB is soothing te your A noted surgeon has discovered an amazing way to grow hair, called Dermo-Ray. In 30 days no more dandruff. calp tissues are given new life. Then within a few weeks, luxuriant new hair! The startling discovery of the almost magic effect of Infra-Red Rayson the hair-growing tissues was made by aleading surgeon. Two years ago he was him- self bald. Today his hair is full and thick. FAMOUS SURGEON'S DISCOVERY Here is his own personal, home treatment, called Dermo- Ray. Atlast a home method endorsed by science. Guar- anteed to bring you these same results in 30 days— or you pay nothing. You can use Dermo-Ray in any home with electricity. The warm, soothing Infra-Red Rays vitalize the scalp while you rest—a few minutes each day is all the time required. SEND NO MONEY (222i. this astounding new scientific discovery, opinions of authorities, incontrovert- ible evidence, and details of special trial offer sent free, if y nu mail the coupon below. To end your scalp and hair t ibles, act at once. Print your name and address plainly — mail the coupon NOW |! ~-==--=FREE TRIAL OFFER------- The Larson Institute Michigan Ave. at Lake St., Dept. 39, Chicago, I11. Send me at once, without obligation, full particulars—ina - _— envelope—of your 30-day Free Trial of DERMO- ar Vame \ddress State POPULAR MECHANICS ADVERTISING SECTION 75 FREE to ambitious men! Pay-raising TOOLS—not just Books! A better JOB—bigger PAY—real opportunities now within your reach through these great home study libraries. Built y America’s greatest Engineers especially for men with limited schooling. Borrow a set free, and see how easily you cam master a better- paid line of work! PICK THE JOB YOU WANT we'll help you tand it! Just Out! Business Management and Commercial Law! Here's the quick way to PRO- MOTION for men eager to win success in business. The “last word” in Accounting, Finance, Production, Sesee, Advertising, Commercial @ great volumes by McKinsey, Simmons, G Chamberlain and others A reference work for executives, a complete reading course for the student. $2 after 15 days free loan, then $3 a month un- til $29.80 is paid Get into Electricity — Build- ing Construction Engineer- ing — Auto Work, where they pay man-size salaries and where the sky's the limit for advance- ment! Where salaries range from $60 to $125 a week and more. Where you'll be “sitting pretty ”’ ditions oa yy _ EW Architecture Building Carpent ry A-B-C! regardless of business con- A for Arc hitectural B for as Building C for Carpentry { S | and Contracting. Here's the E lect Ll’ Ic al e the great b 5 volumes, thousands of illus- t asy, quick road to success in silding industr casone portfolio of 58 Engineering {+ @ chitectural plates of the Orde re FRE -E for a limited time Borrow thie set 15 (4 e days FRE E $2 after 15 — ee days’ loar hen $3 a month (4 a“ A ~ until $24 $0 | is paid. Electrical Engineering Thousands of men with only com- mon schooling have prepared themselves for good electrical jobs with this famous reference library and reading course. New revised 8 volume edition, complete and simplified. Borrow a set free, $2 after 15 days’ loan, then $3 a month until $34.80 has been (paid. Other BIG-PAY Lines Any set loaned FREE so you can prove ite value for yourself Terme only $2 after Auto Engineering Master the one chapter on Ignition and double your loan period then $3 a mx onth. pay.” The most complete Civil Engineering—W mn #0 you can work on every branch of understand it. Inch ide s Steel Struct turee, automotive engineering we Surveying Railroads Public Works have put out Prepares you New 9 volume esitic n ner 4.80 for a fine position in the ten Modern Sho ’ fachine Shop, billion dollar aut« mainte- Foundry and Factory and nance field. Svolumes. For Managemer Produ Dra ote Garagemen, Mechanics and 6 volumes, 2300 pages, 2500 sstrations, euto owners $2 after 15 $24.80 days’ loan, then $3 a month American Law Librory— Wit readi until $24.80 is paid course of 24 texts 13 volumes, intende . yr the business man as well as for the 3 Free Features rospective lawyer $40.20 1. Home-Study Guidance PS oe Mechanical d rchitectural ree 4 volumes 78 pages *1000 pi tures, biue- 2. Membership in Amer Technical Society with @ year's free consulting prints, etc.. $14.80 Steam and Gas Enginecringe—7 3300 pages, 2500 illu Pire Prevention and Ine volumes. only $24 80, 4 volumes. rvice 3. Freeemploymenteservice 1500 pages, 600 ~ ons, $14.80 Sanitation, Heatin ntilating—4@ American Technical ee 140 pike Dept. X-A19 Chicago, lil. f l r ] Civ i] } Society Management & cering—7 volumes Peapregnen t Eng 540 ch Safety 1800 pages, arte and pictures, $24.80 NoC.0.D.—Send NoMoney as fap yee Sees Architecture, Building & pentry 5 vol. $24.80 1 Engineering, 9 vol- 80 ical Engineering, 8 es, $34.80 aapeestinn, 5 vol- | _J umes, $2 } Bu usiness ev) anagement, 9 es, $29.80 m I will pay $2 h until epecial em at your } volumes. $24.80 ft] Law, 13 volumes, $49.80 f Fire Prevention & Insurance, 6 } y es, $14.80 Drafting, 4 volumes, $14.80 [ Sa at Heating & V ating } }4 ¥ es, $148 [ |] Steam and Gas Engineering, 7 Employment Management, ete. L_} volumes, $24.80 v s, $24 8 Name Address ‘ h r ¢ ’ ames ar ress ‘ F y

Page 256

POPULAR MECHANICS ADVERTISING SECTION Over 16,000 men are now making more money because they learned all about auto- mobile repairing in a few months of practical shop training at National. Hal Edwards was only earning $100 a month when he entered the National shops. Today he is the highest-paid man in the big garage tllustrated above. His earnings have increased 300% as a result of National training! Skip 6 Years of Hard Work— Jump Right Into a Big-Pay Job It will take you years to learn the Auto business as an underpaid apprentice. In National’s million- dollar training shops you actually perform work that employers pay big money for. You get unlimited personal training under expert instructors until you are competent to take over a big job after a few months’ training. FREE EMPLOYMENT SERVICE There are more calls for ‘‘National-trained Auto Repairmen”’ than we can supply. Employers are eager to get expert men. Special “Earn While You Learn’”’ plan pays expenses while training. Big Free Auto Book Starts You on Road to Bigger Pay Read how National training insures your success, Learn how National has helped thousands of men like you. Mail coupon for free Auto Book explaining how to get into the Auto business. Automotive &~ Electrical School -.... Dept. 669, 4006 Figueroa St., Los Angeles, Calif.

Send me Free Auto Book describing National training methods and opportunities in Aute Industry Address. .. City

ornoemeenesescébecens DONOR. <.20008%

‘ - ‘ Lowest wholesale Prices on highest quality Grade A goods. Any Handy ‘a can install his own Pp pimping and Heating BY OUR Ney EASY METHOD. Get the be . and pay only a littleeach mont Send for FREE Book New bargain catalog just issued With our cut-to-fit systems y waste material and high labor cost of economical service to home owners, farm. ers, builders and mechanics. Million Dollar Plants back up our Bonded Guarantee FREE book gives you the wh yy Story. rite for your copy toda 107-17 West Pershing Road, Chicago, I!!. LEARN to PITCH rant ATTY,” ED. WALSH, * ALTER JOHNSON, “SMOKY JOE” WOOD. ote oo

Tritt aa ——— oan

su Save

‘Doc “WN AP PITCH R, KNUCKLER, sore, Described and Illustrated tures. i COURSE OF LESSONS SENT POSTPAID for 50 cents. BENEDEK, 2300 N. Mason Avenue, CHICAGO, ILLINOIS Tire Repair Business Sood now/. Nation-wide chain of Tire Surgery Shops now being ex- tended to every town and city Men handy with tools and willing to work are needed. We train you, furnish everything and establish you in a shop of yourown. Sma!) invest- ment required. Write for interesting book. HAYWOOD" TIRE SQUIPMENT CO . 1308 S. Oakley Ave. OF VE s de soo DETAILS Lesso: WH ITE RUCKER THE FADE

Be Your Own Bossi

47 <—" loases. Money i 114 I . y= gy a ma pouitrymen ri dress and k kick of of poultry Soule. American Pty. School, Dept. 70, K. C., Mo. EXPOSED! 69 Tricks of Mediums Fully Explained Every detail given for performing the seemtngly impossible feats of famous mediums. Startling revelations that show how easy it is to fool the credulous. Many of these tricks have made the greatest magicians wonder. You Can Do These Tricks What makes a trick good Is its simplicity. No complicate expensive apparatus needed for these, the best of spiritualist oe You can do such wonders as: Produce spirit mess bl. bitmdfolded. 7a. Produce spirit Taoplnge - = Produce fanting on blank slates. 8 Rew 4 Sealed letters in total dark roduce a burned m messages retain: S ‘the TF and 61 other mervels used ip spiritualistic sear Make Money Giving Entertainments Clubs, Lodges, Sunday Schools, Churches, and organizatior of all sorts are eager for entertainers who can mystify a ences with such inexplainable manifestations as these. can make from $10 a night up to $50 or more, depending on the size of the community in which you work. Any can do this. You need no special gifts. Price $1. 5 Sent C. O. D. anywhere in | Pay postman price and pos If outside U. S. remit when ordering and include 10 extra for postage. POPULAR MECHANICS PRESS Room 703, 200 East Ontario Street CHICAGO, ILL

Read messages while xduce spirit v

Page 257

G f Prices Grade Man nbi NEW e best lonth 00k ssued Save years farm- Dollar altee, Story. iL.

l POPULAR MECHANICS ADVERTISING SECTION 133 Cop 7-% 0. THIS WEW PROFESSION Get This FreeBook’” It shows how easily you can have an independent future and salary as an Ornamental Iron and Bronze Draftsman. Beginners can earn $65 a week— $500 a month frequently paid to trained men Wonderful opportunities to become an executive. Not enough trained men for positions open Easy for you to qualify. No books, higher mathe- matics, or experience necessary. Learn while on your present job. Don’t wait—write for the Free Book right now. American Institute of Ornamental Iron & Bronze 3039 Hennepin Ave., Minneapolis, Minn.

8T TATES MENT OF cs OWNERSHIP, MANAGEMENT, CIRCULATION, ETC. D BY TI ACT OF CONGRESS OF AUGUST 24, 1912, of Popular « Magazine, mB btiched monthly at Chicago, Illl., for April, 2 illinois, County of Cook, se He a notary public in and for the state and county aforesaid, personally ap- pear od H Ht 4 foe r, Jr., who, having been duly sworn according to law, deposes and says t e editor and ey ~_—— of the Po ue Mechanics Magasine and follo wies is, to the best of his knowledge and lief, a true statement of the ement, ete., of - aforesaid public —— for the date shown in the sired by the Act of August 24, 1912, embodied in section 411, Postal K ions, printed on the reverse of this foom. to wit: First. That the ames a 7 addresses of ‘he publisher, editor, managing edito or, and business manager her, Popular Mechanics Co., 200 East St., Chicago, Ill sor, Jr., 200 East Ontario St., Chicago, Ill. 3} Editor, L. K yntario St., Chicago, Il. Business Manager, H Windsor, Jr., 200 East Chicago, Il. Second. That the owner is: (If owned by a corporation, its " vddress must be stated and also immediately thereunder the names and resees of stockholders owning or holding one per cent or more of total amount of f not owned by a corporation, the names and addresses of the individual owners If owned by a firm, company, or other unincorporated concern, ite jress, as well as those of each in udivid ual member, must be given.) L. B. East Ontario St., Chicago, Ill; Windsor, Jr, 200 East Ontario 8t., Lina B. Windsor and Henry ‘nt Windsor, Jr’, Executors of the Estate hicago, I Henry H. Windsor, deceased, Chicago, Ill b hee That the known bondholders and other security holders owning or holding 1 per cent or more of { total { bonds, mortgages, or other securities are : (If there are none, so state.) None. That the two paragraphs next above, giving the names of the tev stock- s, and seeurity holders, if any, contain not only the list of stockholders and » side Ts as they appear upon the | books of the company but also, in cases where r or security holder appears upon the books of the company as trustee ther fiduciary relation, the name of the person or corporation for whom pal rustee acting, is given; also that the said two paragraphs contain statemente embracing affiant's full knowledge and belief as to the circumstances and conditions under which stockholders and security holders who do not appear upon the books of the company as trustees, hold stock and securities in a capacity other than that of a b ide owner; and this affiant has no reason to believe that any other person, asso- ¢ © corporation has any interest direct or indirect in the said pe . bonds, or + WIN DBOR, Jr., Editor and Business n to and subscribed before me Vain 28th day of March, 1927. J. Fs R Al ne M, No ytary Public. (My commission expires June 17, 1928.) Tri-State College of Engineering Makes you a civil, mechanical, electrical or chemical engineer in 96 weeks. No entrance examinations. High school diploma not re- quired. Compact courses of essentials only. Expenses low. Degree granted. Enter Sept., Jan., March, June. For catalog address, Box M-67, ind. securities than as eo stated by him. H. H

Learn Tenor Banjo BANJOISTS! Earn big. money through Charles McNeil’s Snapous ome Study Banjo Course. Simple as A B BC yet has all tech- wheal te .-... « “bre on 2 by Charles Se S years with Isham Jones- wick Records. haw on or

Fibre-Lite Limbs BRACES AND TRUSSES DO NATURE'S WORK. GREAT INVENTION. EASY TERMS. AGENTS WANTED 252-P HENNEPIN AVE. Fart samme |6©6WWORMAN CO. 22.0, SERNEP in ave. NO JOKE TO BE DEAF —EVERY DEAF PERSON KNOWS THAT I make myself hear, after being deaf for 25 years, with *} these Artificial Ear Drums. a

are perfectly comfortabie. No one sees them. Write me and I will tell om a true story,how Igotdeafand jw I make you hear. Address

edicated Ear Drum GEO. P. WAY, Artificial Ear Drum Co. (inc.) 80 Hoffman Bidg., 2539 Woodward, Detroit, Mich.

“We couldnt ° Save a cent “TI HADN'T received a raise in years and my small salary scarcely lasted from week to Ey Margaret scrimped and saved <i did all her own washing and housework, but the bills kept piling up and I could see she was always afraid I would lane my position. But still I kept drifting along in the same old rut. “Then one day I met Tom Wilson, who used to work right beside me. He told me he was making $5000 a year and had a nice home in the suburbs, a new car and everything. I asked him how he happened to get ahead so fast. ‘Oh, I got tired working for a small salary,’ he said, ‘so I started studying at home through the International Correspondence Schools. “That woke me up. I told Margaret that if the I. C. S. could help a_man like Tom Wilson it could help me. Sol cut out that I. C. S. coupon and mailed it to Scranton. “Tt certainly was a lucky day for me. In four months I received a raise in salary and Roles the end of the year I was next in line for manager of my department. We've got a car of our own now and a bank account that’s growing every day.” How do you stand when your employer checks up his men 4 promotion? Does he think of you? Is there any reason why should be selected? Ask yourself these questions. You must m squarely if you expect advancement and more money. At least find out what the IL. C. S. can do for you. It doesn’t cost you a penny or obligate you in any way to ask for full particulars, but that one step may change your entire life. Mail Coupon for Free Booklet ee ee eI ss I ss a ea esa eee ae eee INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5655-E, Scranton, Penna. Without cost or obligation, please send me a copy of your book- let, “‘Who Wins and Why,’ and full particulars about the course before which I have marked X in the list below: BUSINESS TRAINING COURSES Business Management Salesmanship Industrial Management jAdvertising Personnel Organization )Better Letters Traffic Management Show Card Lettering Business Law Stenography and Typing Banking and Banking Law lish Accountancy (including C.P.A.) Nicholson Cost Accounting Bookkeeping ee oon Subjects Private Secretary High School Sub ee Spanish O French Illustrating TECHNICAL AND INDUSTRIAL COURSES fF) Electrical Engineering Architect Electric Lighting Architects’ Blueprints Mechanical Engineer ‘ontractor and Builder Mechanical Draftsman Architectural Drafteman Machine Shop Practice Concrete Builder Railroad Positions Structural Engineer Gas Engine Operating “hemistry Civil Engineer Automobile Work Surveying and Mapping Airplane Engines Metallurgy ining Agriculture CJ Navigation Steam Engineering Mathematics O Badio

Street Address. a ee

Occupation Persons residing in Canada should send thie “coupon. ‘te the Interna- tional Correspondence Schoole Canadian, Limited, Mentreal, Canada

Page 258

POPULAR MECHANICS ADVERTISING SECTION A Great Book Free with this pay-raising library For a short time only we will give every subscriber to the New Library of Machine Shop Practice a copy of French's Engineer- ing Drawing—the greatest book on mechanical drawing ever written. This book makes drawing as plain as day—tells you all about instruments, plans and methods—and prepares you to handle any drawing job you wi!! ever have todo. It comes to you absolutely free with Machine Shop Practice 9 volumes —3065 pages—3608 illustrations (A combined home study course and reference library) The New Machine Shop Library is written for practical men. It oe you the best methods for every kind of machine shop work. texplains machine tools and their operation, drawing and design, tool work, gears and grinding, jigs and fixtures, automatic ecrew machines and their toois and all of the mathematics you will ever have touse. It is plainly written, completely iliustrated—the very pest ~ of help to the machine-shop man who wants to advance mse No money down— ony 77 || Ft’s Fun to Make Things Let the other boys wonder how you can make so many interest- ing things. Make y McGRAW-HILL BOOK CO., Inc., 370 Seventh Ave., New York i: ; 8 1 Make your own Send me for 10 days’ free examination the New Library of Machine Shop 4 automo vile. M ake your own Practice. If satisfac I a! send you $1.56 in 10 days and $2.00 monthly until the special price of $19.50 is paid. lf uct wanted, I will return the a radio. Make your own kites books at your expense. 2.00 Fyteint of tas Set payment of $1.58 ft to padqrotend tt that I am to receive, pee gliders. Y ou can les 10w to make almost anything that any boy could want by following the pictures and the simple directions in The Boy Mechanic Library And just think of it, there are near 4,000 separate articles in the four | tul volumes! Some of the most fa ing subjects are listed below: How to Make — Boats China painting Winter sporte Decorative metal w Camping Furniture making Ice boats Farming Water sports Poultry . aaeree wel —_ fents oratory helps 9 great volumes. | Skis Household helps 4000 pages — Indian snowshoes Wood working 3000 illustrations. / Skating Electrical de i ¥ - . Gymnasium Photography New cditi a Year—and Up! SFOMESs> | Wind vecons Mucte . Motor sleds Outdoor games twelve of “CIVIL ENGINEERING”—in plain English Rad Btoves greatest engineers. wieoen 20 zoe = oe it, even roy — Furnaces . only a limite: ucation. Prepares you for a well- Trapping Wireless Includes: Surveying, paid railroad von gm or public works position. Peta Tricke bridges, railroads, Covers every branch of Civil Engineering practice Leather work Puszles steel structures, mu- At once a reading course for the ambitious student / Carpentry Bicycle nicipal engineering, and an authoritative reference work for the ex- . / Painting Flowers water supply road perienced engineer. Borrow a set—free. Look over Toys Hunting ° the test questions which help you master each . Fishing Kites building, etc. subject quickly. Mail the coupon without obliga- Fruit growing Metal workir.¢ tool tion oday! Entertainments —— locks Automobile wings Lo aned American Technical Society House decorations Sleds Dept. C-A19 Chicago Drafting Power devices Free! i | Bitte OSPR. er en IRE eee Buy. the complete library, includi: AmericanTechnical’Society, ‘ Book 1, Book 2, Book 3 and Book 4 Remegeosion | Sas, Sam comes Yo Se Bae Civil Engineering at I want to BORROW the CIVIL ENGINEER- , ks A home in your spare ING Cyclopedia for 15 days FREE. 1 will each order by number 1, 2, 3 or yee Ape bocnnee ne | SRLS tape aie thee eT | When the postman delivers the boo! ye yg ey return them within 15 da wish to keep your door, pay him the price of the do it justice, to let them I will send you $2 SS i aye, then p ; and the postage. Thatisall. If ou you see for yourself $3 a month until special advertising price, U. S. remit when ordering and in« mere — — $34.80, is paid. 28 cents per volume extra for postax y. e authority anc quality of this great home reading course. Cost and terms are within your reach Send no money— just mail the coupon. 7" a m Name : POPULAR MECHANICS PRESS 200 E. Ontario St. Room 606 CHICAGO, ILL (Attach letter tat ng age, occupation, employer’ and references’ names ar nd addresses )

Page 259

OW st- wn wn ESS , 1LE

The Live Spri ng in the Handle makes “ Yankee’ No. 130-A the Quick-Re- turn Spiral Screw-driver. p or Down POPULAR MECHANICS ADVERTISING SECTION

is the same to “YANKEE” No. 130-A | In either direction driving (or drawing) screws is surprisingly easy and speedy with this world- famous Quick-Return Spiral Ratchet Screw-driver. The live spring in handle keeps blade in screw slot, and brings handle back ready for the next push—without a second’s loss. Great for working one-handed. Just push! The Spring and “Yankee” Spiral do the work for you, and save your time. Right-hand Ratchet, Left-hand Ratchet and Rigid. Three sizes of bits: No. 130-A, Standard “< Nortu Bros. Mrc. Co., Philadelphia, U. S. “YANKEE” TOOLS § Qnake Beller Nechanics Size. No. 131-A, Heavy Pattern. No. 135, Light Pattern. ‘*Yankee’’ Spiral Ratchet Screw-drivers, without the Quick- Return feature, No. 30-A, No. 31-A, No. 35. Some Other ‘*‘ Yankee’ Ratchet Bit Braces. Ratchet Br st and Hand Dril Automatic : Fe ed Be *nch Dril Automatic Puch Drills. Plain Screw-drivers. Ratchet Tap Wre nches ises—removable base. ’ Tools Dealers Everywhere Sell “Yankee” Tools *‘Yankee’’ on the tool you buy means the utmost in quality, efficiency and 0 ET

sa

FREE nkee”™ Tool Book tor all lovers of fine tools. Write for it.

Page 260

POPULAR MECHANICS ADVERTISING SECTION AN ADVERTISEMENT OF THE AMERICAN TELEPHONE AND TELEGRAPH COMPANY THERE ate twenty-five Bell Companies, but there is but one Bell System—and but one Bell aim and ideal: A telephone service for this nation so far as humanly possible free from imper- fections, errors and delays, and enabling anyone anywhere at any time to pick up a telephone and talk to anyone else any- where else in this country, clearly, quickly and at a reascnable cost. Water S. Girrorp President

Page 261

POPULAR MECHANICS ADVERTISING SECTION 115 ETHYL GASOLINE knocks out that” knock”. ..turns carbon into power T is important that you differentiate between Ethy] Gasoline and other “anti-knock” gasolines. Ethyl Gasoline is the on/y fuel which eliminates “ knocking” under a// conditions, thereby making present day auto- mobiles perform more efficiently.

It was developed by General Motors Research Labora-

What Ethyl Gasoline will tories after 8 years of scientific research which resulted in do in your own automobile these two important discoveries. | It will end all carbon trouble and 1 That “knocking” is aninherent characteristic of all gasolines. — carboa formation an asset. What had previously been called a “carbon knock” or pens mo Pye “ignition knock” or “engine knock” is in reality a fuel knock, : scams sak Ge — due to the too rapid combustion of gasoline in the cylinders. ‘ ER: enams eecmREe an, ' 2 That “knocking” could be completely eliminated in gasoline . ped ar hao can Gaur ae. by the addition of Ethyl Brand of Anti-Knock Compound. This 3 It will make your engine operate ingredient was discovered by General Motors research more smoothly. engineers after experimenting with more than 33 ,000 chemical 4+ It will reduce gearshifting. compounds > It will increase acceleration, mak- ing your car easier-to handle in . ~ ° ° ° traffic, O SUPERIOR is Ethyl Gasoline to other so-called “anti- 6 Itwill eliminate “knocking” under ” . it hac “mn < , ‘ 7 den ae knock’ fuels that it has bee n adopted wherever unusual 7 It will reduce vibration and engine performance by a gasoline engine is required. That is why wear and tear, T+ + T ? or iil ce S 8 hulle Oeeheia ues the United States Navy uses Ethyl Gasoline in its latest ; . ° . ~ ~ . . removal, types of airplanes. That is why Ethyl Gasoline is used 9 It will give you more power from

each gallon of fuel that you use. by the racing car drivers who are setting up new records. N sHoRT, the advantages of Ethyl . . , ‘ —_ | Gasoline over regular gasoline are Ethyl Gasoline is available throughout the United marked as to make the small — States and Canada through leading oil companies and emium it costs a real economy. responsible jobbers. It is sold at pumps which display the “ETHYL” trade mark shown at the left. ca

ETHYL GASOLINE CORPORATION, 25 Broadway, N Y.

Page 262

POPULAR MECHANICS ADVERTISING SECTION Millions of Men Buying Dollar Topkis Topkis Flatlock Seam Nine threads, instead of one, sew the mate- rials together at the waistline, forming a seam that isthe strong- est part of the garment. You men have come back for the Topkis Dollar Union Suit until now it must be made by the millions! In Topkis you get quality and vari- ety of fabrics (plain and fancy patterns) like high-priced underwear. And Topkis is cut full and tailored to give fit, comfort, freedom all the time. Biggest money’s worth a dollar buys. Ask dealer for Topkis. Look for label. Write us for free illustrated booklet Topxis BRoTHERS COMPANY, Wilmington, Del. General Sales Offices: 93 Worth Street, at Broadway, New York Fancy madras, plain madras, white or colot stripe, silk stripes, mercerized crepe, pajama check. Men’s Union Suits, $1. Shirts and Drawers, 75c each. Boys’ Union Suits, 75c. Child- ren’s Waist Union Suits, 50 and 75c. In Canada, Men’s Union Suits, $1.50. AT THE TOP OF UNDERWEAR FAME STANDS THE TOPKIS NAME.

Page 263

POPULAR MECHANICS ADVERTISING SECTION 117 Before you start shopping around —send for this FREE BOOK | | | | : e can travel in Pullman comfort | at day-coach cost by investing | wisely in a good used car. But be- | fore you start looking around, send for your copy of “ How to Judge a Used Car.” | Pledge to the Public This valuable guide, written by experts who have bought and sold hundreds of on sed Car Sal used cars, will save you time and money— U es tell you exactly what to look for and ex- actly what to avoid. If you read and heed this helpful, simply written book you will know how to | Everyusedcarisconspicuously marked with its price in plain figures, and that price, just as the price of our new cars, is rigidly maintained. protect yourself when buying a used car ‘ . from a friend, how to avoid “orphans,” | 2 All Studebaker automobiles which are sold what code prices mean, whether to de- | as CERTIFIED CARS have been properly pend on speedometer figures, and the important check-ups to make in examin- ing any used ear—everything the buyer of a used car should know. reconditioned, and carry a 30-day guarantee for replacement of defective parts and free service on adjustments. ——* Studebaker has prepared this free book Ss 3 Every purchaser of a used cor may drive it for your Prenat aon as Studebaker for five days, and then, if not satisfied for any dealers have adopted, for your protection, reason, turn it back and apply the money the famous Pledge shown above. Wher- paid as a credit on the purchase of any other ever you see it displayed you can buy car in stock—new or used.(It is assumed ? ’ : : . with assurance of absolute satisfaction. that the car has not been damaged in the Mail this coupon TODAY! meantime.) a Tue STUDEBAKER CORPORATION OF AMERICA | To the Public: We pledge adherence to the Department F72, South Bend, Indiana above policy in selling used cars. Please send my copy of valuable free booklet, “*How to Judge a Used Car.” | Your dtudabaker Dialer If your dealer lives up to this PLEDGE you can safely buy a used car from him without reading the book. But before Town... access Pe ee you start shopping around you had better send in the coupon STUDEBAKER seventy - pone young |

Page 264

118 POPULAR MECHANICS ADVERTISING SECTION Span Your work Buy separately or in assortments ench... Make it yourself from Stanley Plan SD-72 VERY tool-user needs a work bench. Here is how to get one at very little cost. Stanley Plan No. SD-72 shows plainly what materials to order, how to prepare them, and how to “carry through”’ to the finishing touch. Thousands of men have work benches where they do repair- ing and original construction. =. = A good work bench and good tools go hand-in-hand. Using the best tools brings a personal satisfaction that you should not deny yourself. Most carpenters and man- ual training instructors prefer Stanley Tools because they know from experience that the Stanley name assures durability, correct design, and right “feel.” You can buy Stanley Tools separately The best tools are the cheapest to use and so collect your own set. For your con- venience in buying there are also complet’ sets of Stanley Tools in chests at a wide variety of prices from $15 to $95. Or there are assortments in strong cardboard boxes containing directions for making your own tool chest. Priced from $5 to $20. a ee Your hardware dealer has Plan No. SD-72 as well as other Stanley Plans for making useful articles, or he can get them for you. The plans cost only 10c each. Ask him also for small Catalog No. SD-50 which shows the most complete line of woodworking tools on the market. It is free. If he can- not supply you, write to The Stanley Works, New Britain, Conn. Ask your hardware dealer STANLEY TOOLS

Page 265

IT the trail to joyland! Slip away from crowded streets and stifling heat. Spend never- to-be-forgotten hours at the iake, on the beach, in the breeze cooled country. Short spins. Long trips. Picnics — outings — vacation tours. All yours with the powerful, dependable POPULAR MECHANICS ADVERTISING SECTION ort in Wi Ws | Harley-Davidson Twin. Upkeep is only a fraction the cost of a car — 2¢ per mile for gas, oil, tires and all. Plenty of room in the sidecar for a friend and your outfit. Prices as low as $310 f.o. b. factory — on easy Pay- As-You-Ride terms. See your dealer—send coupon for catalog. Har.ey-Davipson Motor CoMPANY Department P Milwaukee, Wis. HARLEY-DAVIDSON The Single —our famous solo mount that travels *‘80 miles pergallon”’ and is priced at only $235, complete, f. o. b., factory. Motorcycles Twin and Single-cylinder models in a wide range of prices. Get our catalog.

Page 266

8 vwvvvvv—v—VvVrTVvVvVvTVyyYy YD > > _ . > i> i> » > » ” > i i> > Zs > > > i> > > > id > ad i> > iad i> i> > » hd > > > » i> > > . > > i> i> > i> . i> » > > i> i> 7 > » » > > » ld a > b i > a > > > - b © * » > POPULAR MECHANICS ADVERTISING SECTION Always strong at the finish ay ON THE next to the top step of Bill Gettner’s brand-new hand- made ladder lies the plane he should be using. It’s the Sargent Steel Block Plane—the one for just such small jobs as rounding off the last sharp edges or for use in close quarters. But Bill simply couldn’t resist showing how the big Sargent Auto-Set Bench Plane can be used for even such a close cut as this. It’s a versatile plane—the Auto-Set—great for coarse or fine cutting and so much lighter than ordinary planes of the same size that you can use it for hours without tiring. Both these Sargent Planes should be on every school and home work-bench. They are very moderate in cost and long-lasting. See them at your hardware deal- er’s and write us for descriptive booklet today. SARGENT & COMPANY, Manufacturers, 49 Water St., New Haven, Conn. SARGENT Sargent Steel Block Plane No. 5206 Sargent Auto-Set Bench Plane No. 714

Page 267

POPULAR MECHANICS ADVERTISING SECTION **T look for ’em in the Starrett Catalog”’ ‘‘When I hit on some job that seems hard t’ do just right, I find it’s usu- ally a case of not having the right tools. I gen’ally find the answer in my Starrett Catalog.” Starrett Catalog No. 23“AP”’is a mighty good book to have handy. It illustrates and describes 2500 and more fine tools. Simply by looking through it you'll discover a lot of valuable suggestions for doing your work better, quicker, easier. It’s free. Write for your copy, today. THE L. S. STARRETT CO. : ; 4

Page 268

POPULAR MECHANICS ADVERTISING SECTION A” Heavy Duty — 110 Volt A. C. or D.C. No-load speed 1800 R. P. M. Weight, 6 pounds. Costs only $36.00 Goes through cold rolled steel Just as your Hand Drill goes through soft pine RY this %-inch Heavy Duty electric drill on those long, hard jobs you’ve always tackled with a hand or breast drill. You'll open your eyes with sheer delight to see it bite its way through metal. And wood? Well, oak and hickory are a joke to it. Expensive? Not at all. You probably never dreamed you could own a really fine electric drill for the price of this one. No. 1042 costs only $36.00 As a BENCH Drill Universal Motor Runs With No. 1005 Stand pictured dig gt C. or D.C. Also | at left, No. 1042 can be changed re. Ee * from portable to bench drill in a eT ein ane come couple of minutes. This stand is intervals. firm and solid, and affords perfect Every part aulekly acces- leverage control. sible. ean be taken apart in £ five minutes. Standard screws used in assembly. It stands 25” high. Lever arm is 18” long. Base measures 814” x 12” and c-1 Tightly sealed | serves as work-rest. -l-e-a-n. ightly d est. Price only $12. ielcation ‘Silees commutator No. 1042 is one of a complete line armature and field from becom of electric drills in eight types from 14- ing oil-soaked and foul. inch Heavy Duty to %-inch Standard — rilling. made by Goodell-Pratt, and sold by Fine for close 4 s most straight line from hand‘ to drill point. You can close up to wall, floor or ceiling etc. hardware dealers, mill supply and auto- motive supply stores. Write us for lit- erature covering interesting details, and name of a nearby dealer who can supply you. | | } i j Adapted as Bench Drill GOODELL-PRATT COMPANY, GREENFIELD, MASS., U.S.A. MAKERS OF Sovtmniths, MR. PUNCH GOODELL I-PRATT 1500 GOOD TOOLS

Page 269

ow for the fun! Now for the N thrills! Now for the big “kick” of outdoor sport at its best! Here it is—the new Scout 45—inviting youout toa real world of adventure! TheScout 45 has a super-powerful -— motor, snappy acceleration, large bod oversize brake, classy sport handle Also | bars. Holds boundless power for the veteran rider, easy handling | features for the novice. Takes you anywhere—any time—and brings ~4" | you back safely. Ride the 45 a mile cre —and see what a champion sport | solo it really is! | | | | | | / DEALERS: A few territories still = open for agency of Indian Moto- cycles. Wonderful opportunity for ambitious, energetic men. Write ' today for particulars. Address: ( Motocycle Co. Dept. P-6, Springfield, Mass. POPULAR MECHANICS ADVERTISING SECTION 123 p- “The z. Police Special and Sport Solo Easy to Own a Scout “45” Call on your nearest In- dian dealer and find how easily you can own a Scout 45 under our generous pay- as-you-ride plan. Or mail coupon below for the com- plete interesting story of this popular model. A cle Co-s Indian Motocy© | St ringfield, page .etue circular | *s d me FREE descriptive ¢! Sen 4 under no ob Indian Scout Name--- aeeett hh ’ | | \ on the new ligation. 5. This places me e | Address

Page 270

POPULAR MECHANICS ADVERTISING SECTION IST SISSIES EJ “Stronger, Clearer, Better Binoculars than those costing double.”’ —E. F. D., Annapolis, Md. “Didnt need 10 days’ trial —10 minutes was enough.” —L. H. K., Kalispell, Mont, 8 Power Prisms French and German makes; 8-POWER mag- nification, genuine prisms famous REMIERE QUALITE, brilliant ymin ex- uisite definition, Tested by the IDER field of vision: Individual eye-strength GOVERNMENT and width adjustments Leather case, neck and shoulder straps. ESTED by Bureau of Standards at Washington. See miles away! Conquer die tance! Bring people, ships, game, scenes—right to your Feet! Explore vistas of nature! Double the thrill of dashing sports! You'll find these Binoculars a never-ending pleasu ire—a life-time treasure! Usually sell from $40.00 to $50.00. As Importers, selling “ Direct-y-Mail,” our price represents BIG saving. We are selling thousands to Army, Navy Officers, Explorers, Motorists, Tourists, Yachtemen, Big Game Hunters, Globe Trotters, Naturalists, Men and Women all over Oo the World at io eee Price . Days’ Trial Absolutely FREE dh te ay talk of the County! ask for NO in advance! NOt Ine. “on Delivery. BINOCU LARS are sen responsible persone Ke 10-Days’ Trial IBSOLUTELY FREE. If pleased you may pay on Budget Plan: $5.00 MONTHLY or if you prefer to ash at end of 10 DAYS, deduct + 76 and send Check or Money Order for $21.75 in BULL SETTLE: MENT. Otherwise return them. Order NOW at this Special Price! Send NO Money! oO 1.. WworaiNne on Delivery r-_-e- or eee RN Soe SN SEAVER -WILLIAMS CO. Importers, Exporters, International Mail Order House 2 Generations of Honorable Dealings” 365 WASHINGTON ST., BOSTON, MASS. Largest Retailers of Binoculars in America Gentlemen :—Send me the 8-POWER BINOCULARS for 10 days’ FREE Trial on the above plan. CREE OHHH HORT O HEE EEe gen sesecoee, | I customer please tell us something about goureelf. [We will ‘a voice ths informations THANK YOU Pop. M. 6-87 [Bacarra mr x NTANIANS NAN JAN JAN DANS ANTANSANDAN FANT ANUS mE] New Patented Instant Plug Inserting Instrument. Best, Easiest and Quickest Plug pnoesting. Instrument known. That's why every Garage, yuleanizer and Tire Man iseasily sold. Mr. Pim writes: ‘‘Sold 26 out of 30 demonstrations. Easiest seller and best profit maker I've ever seen. Demonstrate and they buy. Write today for exclusive territory proposition and watch your bank account grow. TOURISTS PRIDE MFG.CO. ODep!.5-F Minneapolis, Minn. Lights Gas Without Flame! Sells quick to every user of gas. Lights in- oma mantles, gas stoves, jet heaters. Amaz- Mysterious! No flame or spark. Lighter is he 4 ‘Ov er flow of gas—flame appears. Harmless. Lasts years. Pro- tector cap free with every lighter. MAKE $10.00 DAILY! Boqsowives con tty Retails at 25c. PS a 10.00 for gross, or $ sample dozen, with sure fire self selling plans. Money bac k a mot Gelighted. Masterlite Mfg. Co., Desk RF-23, 110 E. 23rd Street, New York City Extra Income Spare sy din time-Full time profits 200 7 $1,334.00 Profit on Side Line Mr. A. LeDoux is one of hundreds cashing in BIG, making ornamen- tal concrete roy He invested $89.00 a mold that ok $1,334: 4 profit in short time. Ot her molds brought his extra in- come over $5,000.00. Catalog shows hundreds opportunities | = meng WIN INDEPENDENCE manufacturing Brick, Block and Tile inyour community Write for ma chinery catak —It's free q 00 . \ch cowcnere © equirt ates Ls g70 OF $00 vette hag $2.95 Slicker Bnet in the feld. | Brilliant an Colors for Men, Women -~A an : xpeste en men c ¥ Quic' t no # 0 u r Selling f- -y absolutely REE. @ FISK WARNER $22,%r-°°unec: Dept.t Uatcaso LIGHTING FIXTURES Ready to hang Direct from the manufacturer. Completely wired, including glassware. Send for new catalogue No. 28. Just Reduced Prices. Special Proposition to Dealers Erie Fixture Supply Company, Ine. Station A Be inl ceed STOP cranxsnarr END-PLAY! C-A ADJUSTABLE BEARING corrects and prevents end-piay without removing motor. Eliminates many troubles. Easy to instali— =. drop pan. Only $3.75. Ask your dealer or sent pre ADJUSTABLE BEARING CO. , Dept. P, £08 virgins Ave. Indianapolis, Ind. Make $12 a day from start—part time men $5an hour selling famous Pioneer tai- f lored-to-measure,all-wool suits at $23-50- Commissions paid in advance, Striking) leather brief case containing 100 large swatchF jsamples furnished — other equall values at $29.50 an aa Vm OF 2 eo a OF

Page 271

POPULAR MECHANICS ADVERTISING SECTION In Great Britain they say: “England’s wars acturing Block e inyour unity for ma- y Catalog ree end for educed Dealers. y, Inc. 1E, PA. LAY! | prevents ites many an. Only anapolls, ind ———— are won or lost on the athletic fields of her schools”’ How TRUE this is was proven in America during the great war. For in the West—land of husky outdoor men, apparently natural soldiers—as high as one out of four men was found im- perfect for military service because of one mistake made in boyhood: heavy, ill- fitting shoes had injured and deformed the feet. But in the South, where going barefoot or wearing light, easy-fitting shoes is more generally the custom, very few men had this trouble. Keds give almost perfect barefoot free- dom without barefoot dangers. In them you are ideally shod for games and sports on turf, cinder track or floor; and at the same time you are giving your feet the chance to develop which means continued athletic success and health. Keps—the shoe of Champions Thirteen National Tennis Champion- ships were won on Keds in 1926. No other shoe has all the advantages of Keds. They are made only by the United States Rubber Company They are not Keds Trademark Reg. U.S. Pat. Off. The great war showed that if during your school years you wear light, well fitting shoes, you will have little foot trouble of the kind that caused thousands of young Americans to be rated physi- cally defective The “ROYAL TREAD” An unusually rug- ged Keds model with tough mould- ed sole for indoor or outdoor wear. Great anti-slip- ping qualities. In \ white or brown r - | i t | te | | The “SPORTSTER” A sturdy athletic-trim Keds model—built for hard wear. Comes in lace-to-toe style— white or brown—both models with gray soles unless the name Keds ts on the shoe

Page 272

POPULAR MECHANICS ADVERTISING SECTION

Make Your Watches, Clocks, Etc., Blank Cartridge Pistol = PRICES sci ; tL} Dt A latest discovery in ribs ecientifie Visible by Night fis Hitherto, practically unobtain- able except at an exorbitant price, we have at last nn ‘nm producing this remarkable LU MINOUS PAINT, which, applied to the surface of any article, emits rays of white rendering it pertectly visible in the —- THE DARKER THE NIGHT, THE MORE LIANT IT SHINES. Quite simple to .. Anyone—you can do it. A little aprlied to the dial of your watch or clock will enable pan dn oe tell the time by night. You can coat the push but- tons or switch plates of your electric lights, match boxes, and innumer able oS, articles; make your own uminous C rucifixes Luminous Rosaries, etc. Small bottle, price ; Lareer sizes, $0c and $1 postpaid. “JOHNSON SMITH & CO. Dept. 810 Racine, wi Serpent’s Eggs Exploding Cigarettes Box contains 12 eggs. When Well made and ef- See, Lente hal nies ie RL fective Pistol model- snake several fn led on the pattern of fe at long, which the latest type of Re- curls an wis’ 5) 2 ~ ro on x 7 volver; appearance om LAt., \s alone is enough to scare a a x postpaid, 5 tor 25e. u loaded it may prove just as e' a CIGARETTE MAKER a eS real revolver without danger to life. Takes ¢ standard .22 Calibre Blank Cartridges obtain- oe able everywhere, Even the most timid per- GARRET AKER JUST LIKE ORDINARY ciGaRerTes, | 50m can use it with perfect —. A Great BUT SUCH REAL STARTLERS! The box | Protection ramps and conteias = genuine ao Wy of excellent Dogs. You can ee it ying about without qu 1 wy «a D ° c cigaretio ia about one-third smoked, the victim | Metter ncahe sod onpocter neues tor Stee ONLY S0c gets a very great + surprise as it goes off with a $1.00, Postpaid. loud BANG! great mirth provoker yet | Blank Cartridges .22 Calibre at (by express) SOc per 100 Roll your own and save money Makes | &ntirely baruslees. Price 25¢ per box. Revolver Holster and Strap (Cowboy ty pe) for Blank them halt tse oaker Serane waving pase Cartridge Pistol, 50 cents extra. 7 than hi se you avorite brand o o- PO. \ anc andy ‘locke I Ww Seensltth Sn mite «soa |) OPUIAF Watch Charms | BOYS! BOYS! BOYS! “MIDGET BIBLE | > THROW YOUR VOICE Beene Word, Ta REE ches it ONLY Into a trunk, under Os a> ao werd bat oie y 2 for 40c; $1.35 doz. geo bed or any- 200 Pages. V4 is) fata BE : where, Lots of fun Said to bring ata ies ok ey Very, prgtty little curiosities and decidedly uy fooling the teach- ox u u ‘ 4 d rn . nove wi mil the Ba a 4 e nleage the pic ore to» mn cenctanimenee ‘.er, policeman or nuine wo i in fact, it seeme almost b of art. 3 Must : picture could be mene «hy ogee ped aoe friends. be seen to be appre somntedl Make g00d bwney pass, and how sharp and distinct they show up selling them to friends, ch urch $900. 42 Ie em when you look through. Come in assorted THE VENTRILO PRICE eet 9, for - S x AE enn Page of Panama Canal, i . . . so 0 ainable in “ol . ete. Leather Binding, with gold edges. Price SOc al ttle instrument, fits each, 3 for $1.25, $4.50 per doz. Magni- . in the mouth tying Glass for use with Midget Bible, 1Se. Mystic Skeleton sight, STAGE 2s Withabuneh a eee Gane for Bird Calls, etc. Any- (( it is easy for | of a skeleton 14 N Fail can use it. each person | in. in height, will ever Fails. A16 page course on ventril- of limited | dance to music oquism, the Ventrillo, ALL FOR 10 CENTS means to | and perform va- appear|rious gyrations rosperous | 4nd movements y flashing | while the oper- a roll of | ator may besome these bills | distance from it. Everything about the Ku Klux Kian tid : a + t A > t - in a clear, fearless manner. Book te lis all ; op How it started and was oppressed in 187! time and peeling ‘off a genuine bill Novelty Sanne The New Ku Klux Kian—How Orga or two from the outside of the roll, ‘ seem ized—How Members are Enrol!ed— (at the effect ererted will be found to . : ‘ of the Klan— Questions for Candidates be all that can be desired. Prices, \ . | : —Creed—Objects of the Order—Ob« “ postpaid: 40 Bills 20c, 120 for 50c, s . r\) 4 —Fidelity— Pledge of Loyalty— a Klux or $3.50 thousand postpaid. ; | \ . 5 Kian and the Masons—The Jew Wo derful X-Ra T b ‘| Re . | = Masons—Real K. of C. Oath—The Neer n ay u e \ Y i Kian, ete., ete Latest and most comple A wonderful little “ 4 yo py . on the Klan published Price 35¢, Postpa x instrument pro- Ws ss mpe or Coin ducing optical Male H illusions both | Kissing Permit 10c Garter Inspector 10¢ i, Sex Indicator surprising and Two very novel metal badges, nickel Hold the MAGIC INDI- T startling. Ww ith it | Dlisted, that you can wear, giving you fun . CATOR over : you can see what is apparentl —. © out of all proportion to their trifling cost. your Gagere, the lead in © et peat gl ae 10c, each badge, 3 for 25¢, or 75¢ per terior opening in a pipe stem, and many other z. postpaid anywhere

si panties illusions A my stery” that no one has been able to satief ac sertiy explain. Price 10c, , plete an Zfor2S2 tdozen 7F5Sc. Johnson Smith & Co. MAGIC FLUTE circle. The same action ean n be obtained over a letter written woman, etc. It is fascinating baffling. We “ag ml be “1 a ; 4 out how it’s done, but we've never seen it fail any novel 5 Wonderfully Sweet Toned and Musical ing feats may be performed with the Sex Indicator. For exams results can be obtained with animals, cats, dogs, rabbits, over b The Magic Flute, or Human- | canaries, ete. Also used to predetermine the sex of chickens ar nd t atone, is @ unique and novel | n fact it is sold asa patented egg tester in Europe. Price 25c, or 3 !o musical instrument that is played with nose and mouth combined. There is just a « little knack in playing it which, when once ac- vuired after a little prac- ice, will enable you to produce very sweet v ¥ «triking and uncommon ring. Silver wy music that somewhat ANERY Si ead evensbene design, with two resembles a flute. There Everybo- brilliant, out of the | is no fingerinz, and once you have mastered ' ve id by i L it you can play all kinds of music with faci lity dy delighted and ease. When played as an accompaniment . with it. Odd. to @ piano or any other musical instrument, the effect is as charming as it is surprising. — pee Sneoeee — JOHNSON SMITH & CO. 100 in Seas It is also an Opera G'ass. . Dept. 810 RACINE, WIS. Burnii ‘- Bde Cane Relies of coy oaw 1927 CATALOG mailed on receipt of 25c. \dsome —a Bigger and better than ever. Only book of its kind in existence. pages of all the latest tricks a magic, the newest novelties aon se ing goods, stamps, ennens) eae and ’ er great — you need one. Don't miss it ‘. 00 Interesting books, curiosities in Sesds — Biante: — —— = mail, postpaid Price only 35¢ or 3 for $ :. gy ny tS eae aed | JOHNSON SMITH & CO., Dept. 810, RACINE, W! ———<

Page 273

tol ICES Oc & 1.00 Paid ILY 50c oStpaid. er 100. r Blank YS! tril. ENTS » d— Oat ‘didates bedience Cu Kiux ws The licator \GIC INDI- : s ery use ing the Giass, @ scope. @ examin- 0 locate ne Dv or $1.00 we, WIS. POPULAR MECHANICS ADVERTISING SECTION 127 comic CELLULOID BUTTONS Celluloid Buttons provide subjects for pleasant jokes and amusing con- { thus smooth the way to a more familiar acquaintance and cordialfriend- ereare seventy different titles altogether, all very wittily worded and quite ectionable. Wear one and see the effect. All four Buttons illustrated above will “eo ¥ yetpaid to any address for ONLY 20c or a dozen, all different, for 45e. You've > Yourvs| LOCKS peo ple! These clever locks can- turning | not be opened unless you reen with | Know the combination. & - No key necessaary. y envy but your locker, bicycle, tool ee / t h @ Y |echest, mail bo haven't turned half as green sands of uses. the fellow who unwittingly and tumblers wees thia soap. It is an exact | pla Weighs oe licate of an ordinary piece |over one ounce. 8m ee. Seer it contains ret strong. Secret and » hemical which acts like a dye |full instructions wi ete > comes intocontact |each lock. PRICE 25c¢ with water. PRICE 1Sepostp’d. | or 3 tor 65c postpaid. Every Boy His Own foy Makey INVISIBLE INK The most con- Greatest boys’ book written. Tells how tojsages make a Pinhole Cam-/ten with this Ink, era, & Canoe, modelifor the writing Railroad, a Telephone,|Makes No Mark. Boomerang, Telegraph|Cannot be seen un- instrument, Box Kite,!less you know the Talking Machine,jsecret. Invaluable Microscope, Electric Motor, Electric for many reasons. MAGICIAN’S OUTFIT Soggocam and Directions for a Number _ ysterious Tricks Enough for an Entire Evening’s Entertainment QF ANYONE CAN DO THEM 15¢ It ie great fun mystify ing your (riends. Get this Conjurer'’s Cabinet, and you will be the cleverest fellow in your district. It contains the apparatus for seven firstrate tricks, in- cluding The Disappearing Kose, that, when placed on the lapel of yous coat, vanishes from sight at will; the Magic Vase and ball ‘irick ( is placed inside, and upon re- and is found * in an envelope, and wher open an entirely different card altogether is found); The Dieappearing Coin Box 8 coin is in the little wooden barrel, and, when again, ie found to have vanis entirely, or can be made to change into a coin of another denomination); The Famous Dissolving.Penny ‘rick; ‘The Glase Goblet and Vanishing Coin Trick ( coin is dropped into a « of water, and when the water is poured out the coin bee vanished). With the tricks described abo ve we send full printed instructions for performing each trick, eo that anyone can readily perform e!! the tricks to the great amusement of their friends or the public. Any boy of ordinary intelligence, with thie Cabinet of Tricks in his ssion, can give a parlor enterteinment not inferior to some regular magicians. sides the tricks contained in the Cabinet, there are many other feate ad Weenlone fully explained with full printed inetructions, for which you easily make or procure the necessary apparatus. Thie unexcelied Cabinet of Tricks for LY 75 CENTS POSTPAID TO ANY ADDRESS. Great Fire Eater SQUIRT ROSE Most Sensational Trick of the Day! With the Fire Eater in his possession any person can become a perfect salamander, apparently breathing fire and ejecting thousands of brilliant sparks from his mouth, to the horror and consternation of all beholders. Harmless fun for al! times, seasons and places. If you wish to pro- A REAL STARTLER. This is the most popular of al! equirt tricks. The Door Bell, Water Wheel, Paddle] Keep your postais and other pri- Raft, a pair of Skis, a Dog Sled, Bird House, Rabbit Yard, ete. 64 g eyes. ea for pages, 150 Illustrations. PRICE,/playing practical jokes. Only 10c postpaid; 3 for 25c postpaid.\iSe a Bottle; 3 for 40c. => MiniatureWatch Charm Pistol duce a decided sensation in your] flower in your coat looks so fresh and neighborhood don't fail to procure one. Wesend the Fire Eater with all the materials, in a handsome box, the cover of which is highly ornamented with illustrations in various colors. Price of all com- plete only 30 cents, postpaid. sweet that everyone is tempted to inhale the delightful perfume. ‘Lhen is the mo- ment to prese the bulb. Geew)illikens Don't they jump? ‘There is a very long rubber tube that easily reaches to the ket of your coat or trousers, and the Boip is large enough to make a dosen shots with one loading. PRICE 25c each, or for 6Se¢ postpai PZ Exact reproduction of a real pistol: actually fires Real BLANK CARTRIDGES of miniature size. Ilus- Shoots Blank Cartridges Loads the trigger and it goes off with a loud bang. Pistol is break-open type; i a shows position for loading. Made entirely of high grade steel, nickel plated. octa- handsomely engraved handles, complete in box with cleaning rod. PRICE Also furnished with pearl handles. .50. IDGES, of 28 JOHNSON SMITH & CO., Dept. 810, RACINE, wis. ANT One of the most wonderful plants known. Possesses the strange power of turning in a few minutes from an appar- ently lifeless, dry herb to a = BEAUTIFUL LIVING FERNLIKE PLANT of a dark green color. Simply place the plant in saucer of water, itwillopen up and start to grow in 20 minutes. When taken out it will dry up and go tosleep until placed in water again. Fine house plant—summer or winter. 10cents each or 3 for 25c., 75¢ per doz... postpaid. Microp You can easily make a highly sensitive detectophone by using this Transmitter Button to collect the sound waves You can built your own outfit without buying expensive equipment. It is simple and inexpensive: You can install an outfit im your home and hear conversations being held all ever the house. Yow can connect up different rooms of a hotel. This outfit was used by secret service operatives dur- war. It is being used on the stage. It is ultra-sensi- tive and is the greatest invention in micro-phones. You can mount the button almost anywhere—ea: boxes, stove Rives. stiff calendars, on the wall behind a picture frame, etc. utton is so light and small it cannot be detected. Persons can be overheard without suspecting it. You can listen in on conversations in another room. A deaf person in the audience can hear the speaker. Connected to phonograph, piano or other musical instrument, music can heard hundreds of feet away utton may be uw to renew telephone trans- ; often makes an old line “talk-up” when nothing : else will, The ideal microphone for radio use; carries heavy and is extremely sensitive Ampli radio signals. Countless other similar ral suggest themselves. Experimenters find the button useful for hundreds of ents along the lines of telephones, amplifiers, loud ers, etc. Many fasci- Stunts may be devised, 3 as holding the button against the throat or chest dng duce speech without sound waves. $5.00 is given to anyone who sends in a * suggestion for the use of the Button provid the manufacturers find it suitable use in their literature. PRICE $1.00 POSTPAID ANYWHE current PISTOL, OPERA & FIELD GLASS PRICE postPaIp, $1.00 : you whether it a 0 0 % a is real or not. Thusit is likely to prove itself very handy in an emergency. On pressing the trigger it opens up, as shown in the illustration at the right, revealing nine most usefu articlee— Opera and Field Glass, Telescope, Mirror, Magnifying Gissand Burning Lene, Reading Glass. Sun Dia:, 8un Compass, etc. In the handle of the revolver there is # place for various pocket necessaries, such as First Aid Articles, Buttons, Pins, ete. The Pistolis of sheet metal, blued finish. that can be carried comfortably in pocket PRICE $1.00. SURPRISE MATCHES} More fun than fighting with your wife. Look ust like ordinary matches. Put up in boxes just oc ike regular Safety Matches. As the victim tries é to light one he gets quite a surprise. PRICE 10c 10 per box, 3 boxes for 25c, or 12 for 75 cents. Cc SEEBACKROSCOPE | sconon ROPE SPLICING By merely A most practi- placing this ~ IDER calhandbook giv- clever instru- Sows ing complete and § ment to your simple direc- yr y . tions for making pa HP ay ne all the most use- ing on behind ful knots, hitches, your back rigging, splices, and some- etc. Over 100 . : — . lustrations. Al — oll Ap A Lp about wire rope attachments are looking. Why it is just like | !ashing, blocks, tackles, ete. 37 Raving eat the uk. Zou | great vain to mesani: re head. PRI cents, postpaid, 3 for 50 cents. It is made in the shape of and looks like a regular Auto- matic Pistol. No one Is likely to stop and as gers, campers, boatmen. Price 20 cents postpaid. The **Little Giant’’ Typewriter A First Class Writing Machine For $1.50 A perfect little typewriter for $1.50. There are thousands of persons who would like to use a typewriter but whose needs and business do not war- rant the expense attached to the p chase and use of a fifty or seventy-fi dollar machine. To such pereons we confidently recommend our Little Giant. Itis strongly made, but simple im construction, eo that anyone can quickly learn to operate it, and write as rapidly as they would with n a and ink The letters of the alphabet most frequently used are so grouped as to enable one to write rapidly, the numerals 1 to 10, and the punctuation marks being together With thie machine you can sen your best girl typewritten love letters, address envelopes, make out bills, and do almoet any kind of work not requiring « large, expensive machine. With each typewriter we send a tube of ink ‘and full printed instructions for using the machine. Price com- plete $1.50 by mail postpaid te any address in the world. Sera seer. JOHNSON SMITH & CO. x" Racine, Wis.

Page 274

POPULAR MECHANICS ADVERTISING SECTION 4 out of 5 Have Razor Pains But not the folks who shave with Barbasol. No, sir; all slick and swift and cool for them. Nobrush. Norub- in. Use Barbasol— 3 times—accord- ing to directions. **Mister, you’re next!” Barbasol For Modern Shaving Ss oe —————— & | Barbasol 4s The Barbasol Company Indianapolis, Ind. Lenclose 10c. Please send trial tube. Name.____. Address.................. = _ P-M-6-27 How Does He Do It? —Always has extra money for pleasures and things he wants, yet he doesn’t draw any more pay than you do. Hundreds are making from $3.00 to $6.00 an evening with the FOLEY Automatic SAW FILER The only machine that automatically files and joints all kinds of saws in one operation. Big demand for its speedy, perfect work. Often sets a man up in business for himself. You'll make extra money easily—write today. FOLEY SAW TOOL CO., Inc. 216 Foley Bldg., 27 Main St. N. E. MINNEAPOLIS, MINN. Model F-3 Hand drive Also made in power drive models. MOTORCYCLES Price $10 and up purchased through our Co-Operative Plan for as low as $1.00 down and $1.00 per week Indians Harley-Davidsons Ace Henderson and Clevelands Send ten cents for Bulletin A f otorcycles shippedt oaliparte of the world . M WALKER-INDIAN CO., 188 Mass. Ave., BOSTON NEW VEST POCKET ADDING MACHINE ee ADDS, SUBTRACTS, MULTIPLIES, DIVIDES hye ory Does work of $300 machine. Guaranteed 5 years ieee NOTA TOY. Made of steel and indestructible. Million dollar eapacity. Fits in pocket. Will not make mistakes 5 Sosimple child can operate it. Instructions fur- nished. Everybody should carry one for figuring. TRIAL TRIAL NO MONEY—Just name and address. We will ship leulator immediately. On delivery pay postman $2.50 (Plus few cents Postage). (If outside U. S. send cash). If teatisfied after 10 day trial you Es your money OUSANDS OF SATISFIED USERS. a is is lowest geteae practical calculator made. ‘“Why pay more for inferior imitations?’ Order from this ad. _—— == «—-=- Vail Coupon Today=-=-=---—--—- BABY CALCULATOR SALES COMPANY Dept. 41, P. O. Box 1118, CHICAGO, ILL., U. S. A. O Iam enclosing $2.50—send adding machine prepaid. 0) Send Adding Machine C.O.D. $2.50 plus postage. SRS RR SR4E Be depend Geibdsdsoeeee Cicvasseccues State AGENTS Write for big commission and territory proposition. Your Coat and Vest Can Be Matched with New Trousers 2% of the price of your suit is in the coat and vest é Why not get full value out of them by replacing the worn out pants with a new pair. Send us sample (small piece from seam or thr and we will show you how close we can match !t tailored to measure. Prices range from $.00 Enclose $15.00 according to quality. ACME PANTS MATCHERS ILL Pay You 40 A DAY! To Show My Mystery New Cigarette Lighter to Mea Quick, easy profit for you with this amazing Lichts cigarettes and cigars in strongest Wind q of expensive lighters but sells for only 50c. Guaranteed for 10 years. No Men Making Money * Elmers sold 48 in one day. Only wind can one day's sales todealers | ° easily nets ou $38. blow it out! Enormous steady repeat business. No experience necessary. p dnd full or ow oe: spare time. mokers an H d s dealers buy on sight. Send it work? 50e and name for special sample and sure fire sellin, plans. Satisfaction hnnteevme 4 MASTERLITE MFG. CO., Desk CF-23 110 E. 23rd Street NEW YORK CITY

Page 275

POPULAR MECHANICS ADVERTISING SECTION 129 $3500 .|] | IN SIX MONTHS FROM $500! ite washing houses with the ‘NI NIELCO Lightning Washer The only machine of its kind, to wash any painted surface, tile, terra cotta, and glazed brick. Painters say that 90% of the houses painted each yea are painted because they are dirty and NOT because they need paint. We find that 44% of the home owners are interested in having this work done. NIELCO Cleansing Com- Mae pound used exclusively with mee the NIELCO LIGHTNING _ > WASHER IS GUARAN- ds | TEED to be harmless to the word hands, paint or lawn. TON » Be Exclusive Territory isers nd vest Available to men who want ie to get into a profitable busi- x al ness. Two men with one machine can make $20.00 per ie | From an unretouched photo taken of the day profit, in addition to pay- — NIELCO LIGHTNING WASHER, in action and ing themselves regular wages. just before rinsing. We help you get the business! tl | Write or wire for your territory and proposition / i NIELSEN INDUSTRIES, Inc. a” | | Maccabee Building eae wae DETROIT MICHIGAN Industrial Users: A NIELCO LIGHTNING WASHER and cleansing | compounds for every purpose ll LIVE DISTRIBUTORS WANTED!

Page 276

POPULAR MECHANICS ADVERTISING SECTION

——— ~ — SS o Maes Gaon, oy WAR OENS INTO -.. Add —= Wood In A Can Holds Screws and Nails without splitting / PLASTIC WOOD handles like putty and hardens into real wood on exposure to air. It may be worked with tools, holds nails and takes paint, stain, lacquer and varnish like any wood. PLASTIC WOOD is a great help in any construc- tion or repair work. Try it to mend broken cor- ners of screens and to fill old screw holes in win- dow and door frames. Sold by Hardware and Paint dealers— 4 Ib.. 35c; one pound, $1.00. Send coupon if they cannot supply you. mee a ea i eee Addison-Leslie Company, 40 Bolivar Street, Canton, Mass. Please send me a trial quantity of PLASTIC WOOD for which Lenclose 35c. Name Address Name and address of Hardware Dealer PARKS WOODWORKING MACHINES Cabinet Shop Special 290 with Motor You ought ‘to have this handy Parks in your shop. It is a compact, complete machine designed just like a big production outfit at one-fifth the cost. Includes 8-inch circular rip and cross cut saw with polished cast-steel saw table, 16-inch band saw with tilting table for bevel-sawing, 6-inch jointer, and motor op erating from any light socket. Just plug in and go to work! Fits in a corner of your basement. Does any kind of cabinet and joinery work. Add lathe, shaper and other attachments any time at small cost. For the man who does “‘odd jobs” in his off time this Parks is a big money maker. Turn out as much as a four-man shop working by yourself. Write for circular and Parks complete catalog of handy woodworking machinery. The Parks Ball Bearing Machine Co. 1500-1540 Krowlton St. Cincinnati, Ohio Canadian Factory: 208 Notre Dame East, Montreal, Can.

The Handy Tool for the Handy Man TORIT N°23 Acetylene Torch PAT. JAN. 5, 1926

PROTECT YOUR TOOLS FROM TH Write with electricity any name or design on the hardest and finest tools and instruments, or any metal, like writing on paper with pen or pencil ete Outfit $3.50 — Prepaid Anywhere Interesting illustrated circular free. Write

TORIT TORCH NO23 ~~

——-. a Interlo THE SPEEDY RULE Measure Hard-to-Reach Places with Indispensable for accurate side and outside me ~ ments. Slides — no f i : | — ER 2 6, ’ YY Any length, 2 to 8 ft., 20¢ lineal ft. If notat dealers, sent postpaid ADAPTER -€ TIP 23. FOR HEATING < SOLDER USE wiTH SOLDERING COPPER use With TIP NOSS TIPS 20628 Uses cAcetylene Only. No oxygen or air pressure required. MASTER RULE MFG. CO., 813 E. 136th Stree

Tips suck in air. Simply connect to Presto auto tank, light .

. _- = Ee: and the outfit is put to work. Gives Heat pare, ay ‘res: ats anything you ever tried for soldering, radiator re- Pairing, melting, lead burning, tempering, heating, light brazing, etc. Consists of torch, 4 tips for different kinds of work, soldering copper, 5 feet rubber tubing, tank connection, and full instructions. All readytouse. Quickly $ 50 pays for itself. PRICE, complete, without tank, 75° ST.PAUL WELDING & MFG. CO. 177 West Third Street Saint Paul, Minnesota

If you want to be free from ‘ about your tools, keep safely in a GERSTNER Tool Chest There's one you can «se an you will want. Write for iree cataleg A cater Sens 442 Columbia St., Dayton, Ohio |

RAZOR Stree ——

a ety A Genuine $2 Knife for $1.18 Postpai a s Hand Forged Razor Steel Blades Handy shaped Blade makes this knif ‘ e best for mec men and farmers; light but strong: re-shar or pmo Ny handle. German silver finish: blades file tested. ‘ razor steel and warranted. : —— ae . 1 . — 7 + - ~ a .

hand forged from ee tiles (tm Direct at Factory Prices a : j : | Sample $1.18 3 for $3.00 Postpaid rts. tone Wy Send for our 100-page FREE List: Stag “HOW TO USE A RAZOR <= Maher & Grosh Co. 106 A St., Toledo, Ohio

Page 277

POPULAR MECHANICS ADVERTISING SECTION TEMPERED FOR TOUGH wy The tougher the job, the greater the need for a saw made of special steel —a Simonds World-Famous Crescent-Ground Cross-Cut Saw. Ask your Hardware Dealer. D. e.. “ ; SIMONDS SAW AND STEEL CO. : : ay “The Saw Makers” d ‘ C Established 1832 Fitchburg, Massachusetts ) Ly , ~~ er . Pie or is . as 8 Pronounced SI-MONDS SAWS FILES KNIVES STEEL Branches and Service Stations in Principal Cities 2 we NEW IDEA : | =" ™ moor saw Put TI mete Does the work of band-saw, rip-saw, cross- VA =" cut, miter, bevel and scroll-saw. A wonder worker for the home shop. Direct drive! Can't stick! Cuts 2” wood. Most amazing variety saw ever invented. Does more, costs less! Not a toy. Write for circular. t A TT t BATES MOTORCRAFT COMPANY Oo ny 28 WN. Clinton CALCULATIONS WAR inOffice. School, Store and Shop can be instantly : made with the Blideot Slide Rule, It givesthe ens Tools of phenomenal strength and wearing wer to any problem involving fractions. mized-num- qualities. . . . You can drive rivet punch bers. decimals, whole-numbers, roots, powers, Logs. through auto frame. . - Cut shaving off and Trig. Functions. Thousands of these ruler are axle haft with be: > awans ened hy Aseountente, Baninesm, Gleske, Geedente. axle sha with bearing scraper. . . . Lock ete. itis the most versatile calculator ever invent- our wrench with any other wrench and bring ed. Ifyou have any figuring to do, orders Midget pressure until one breaks. ... Drive %” on white eathulstd. bine ri a ee chisel through 1%” machinery steel. ... Price with Instruction Book, $1.80. Leather Case. | Your money back if tools fail to meet these SOc extra. Catalogue Free, Bent C. O. D. if desired. tests, 7 / Be cacen nsen Grange. Some Mate. aides Youre ore vali ools Tight Handles—send for booklet Hand made of al Swedish Charcoal hest “HOW to KEEP TOOL HANDLES TIGHT” | | Pro", Mobadenum, Steel manufactured to Fayette R. Plumb, Inc., 4857 James St., Philadelphia heat treated, hardened and tempered in oil. wrt = ost drop forged and case hardened, : * ; Free Booklet — Mail the Coupon . Handiest tool in your tooklet describing amazing tests of > workshop. these tools will be sent upon re- ; quest. Our Money Back Ohio} GLU Ee In bottles, tubes and cans. Guarantee is your as- - s . y surance that these - The Cornwell ae cea tools will do ag ll = Guatiey Teste Co., everything we = Jept. L, _ I he CR ESCEN | claim. ti ¢ Cuyahoga Faits, Ohio paid - Send me new illustrated booklet with 20° band saw, 4° and 6° bench jointers, No, 12 saw prices on full line of Cornwell Hand- lades table are adapted for use wherever there is wood Made Tools. work to be done, These machines are small but are st ar substantially built, Ask for circulars. ~e In the larger sizes we can supply band saws, saw tables, jointers, shapers, variety wood worker, Co. planers, planers and matchers, disk grinders, cut off Jhio table, swing saws, borers, hollow chisel mortisers, ene tenoners, self feed rip saw, universal wood workers, THE CRESCENT MACHINE CO. 93 Columbia Street, Leetonia, Ohio, U. S. A.

Page 278

Pathex POPULAR MECHANICS ADVERTISING SECTION CKeép forever the thrill of today/ catches all the life and action of the moment so easily, simply, and inex- | AdBralse SPEED over QQ miles perhour MASTER SPEED TWIN SEND for FREE BOOK. The only outboard motor with neutral starting position—the only one with fast and slow speeds forward and reverse—the only one where the hand that ‘steers controls all speeds by merely raising or lowering the steering handle. Other features—practi- cally vibrationless—safety tilting—light weight—the famous Caille guarantee—easy payment plan. THE CAILLE MOTOR COMPANY 6218 Second Blvd., Dept. E., Detroit, Mich. pensively. Just a few seconds to load—then aim, and press the button! Pay as You Play $32.00 » putsa motor on your boat. The rest in easy Non-inflammable film, and free develop- ment of all you take, gives you the utmost | in safety and low cost operation. 4 r Ne: Payments. = New complete Motor Driven outfit—lowest sifias bore price of all. The projector shows your own | pictures and a wonderful variety of films | Rider Agents Wan from the Pathex Library. Selec eneet tn t Spo Bo 24 Sitenvodtens and sizes of ea cycles. els for every age. Ride and exhibit sample and make money. 9 Wesh 3O Days’ Free Trial sciectOn Approval If for a month's trial. If Bet. sy satisfied, r: at our expense, ces from $21. ¢ best quality, factory caeen. Save big money on ks * Lamps, wheels and eq t.lo New Y ork, N bs NoMoney.do business diocstwite males. a PATHEX, Iac. 35 W. 45th Street Write coe for a jCatalog, factory prices jand marvelous newofter. Demonstration at your dealer’s or write direct to us for illustrated booklet. Now you can convert that old Ford gd bw neh p a car into a useful farm tractor without altering any Ford parts. We furnish the traction wheels, drive gears and auxiliary axle and mountings, ready toclamp ontothe Ford frame. Pulls 16” plow Wrtte for Free Particulars. SHAW MFG.CO., Dept.S, Galesburg, Kan. Science has finally F~ duced it. An instanta- neous metal cleaner— neither sloppy liquid : nor messy paste ary ™ magic floss. Lyn it to D t SCOVE nickel, copner or ae 4 a The meta ines brig ond clean iactontiy pe A B Oo L | Ss H E Ss hard_ rubbing igh t- ning Silver C aie Coss cape Ld mA TAL AND FURNITURE Silverware, Lightning Furn' ture Floss jinstantly cleans and i oO L t S Be eo hig on Furniture. , — Rotiquidt U1 Tigienin Polishing Imagine! Touch tarnishe Cloth is approved b House- cles with a Lightning Cloth or Floss and you ' ee. “Keents them bright as new Der The AUTOMATIC MOTION PICTURE CAMERA AND PROJECTOR ie ® strations positively Lathes $6.00 to $75.00. Largest line of small lathes in America. Send four cents for 24 page catalog of lathes, drill presses, bench saws, jig saws, band saws, etc UFACTURING DOWN Brings this Lathe to You ANY Toledo, Ohio Every one asale! A real money on every call Makes a Sensational Demonstration! Guecyhody Buys These Products Furniture Floss. Autolsts buy Lightning Polishin weg and a ' in big quantities. Nothing else like t meh ot Exclusive territ Real tion. Triple profit = usive te Ol eal cooperation. ep ro Sample Free! { s ad at once. "Make big —t Basy! Quick! De lay. Write Now!" MFR E test sample and pro ion by return mai Sell all three t« E. 0. LIGHTNING PRODUCTS coRP., 1773 Greenleaf Ave. Chicago Housewives buy the Lightning Silver Clot! Sure big, quick Mi Answer BENJ: Air Rif

Page 279

POPULAR MECHANICS ADVERTISING SECTION 133 IN ONE 00 Earned montH A BIG MONEY-MAKING BUSINESS ABUSINESS TO ENTHUSE OVER—THE “IDEAL” LAWN MOWER SHARPENER A wonderfal invention that sharpens lawn mowers scientifi- cally—quickly—perfectly; does the work as nothing else can. W. T. Moore, Twin Falis, idaho, W. F. Kendt, Buffalo, writes: “I writes: ‘“The Ideal Grinder, as a sharpened 994 lawnmowers last sea- side line, netted meaprofitof scnandthe receipts were nearly $2,100 3 .00 in 90 days.”’ which is not bad for a side line.’ LAWN MOWERS SHARPENED TO RAZOR EDGE People giad—owners delight in mowing lawn with mower sharpened on an “‘Ideal.’’ Mower runs light — click-click-click and the grass is cut. Build ce business for yourself. Start Now! No town too small. If you work at a trade, put an Use Your Spare Time 1323" ycie ieses bea earn $4 to $6 an hour evenings and Saturday afternoons. WRITE TODAY {2A money: maxing machine. FREE THE FATE-ROOT-HEATH MANUFACTURING COMPANY Plymouth, Ohio : “I made USE THIS — MAIL IT TODAY writes $820.70 in 55 days withmy “Ideal.” » The Fate-Root-Heath Company high as$33.70 818 - 844 Bell Street, Plymouth, Ohio in oneday,”* Please mail free Illustrated Catalog and ‘ booklet with scores of letters from “‘Ideal”’ a a a Make : s BIG Spare-Time " Send Tou the WY wamrere MONEY Greatest LOG SAW Offer

Fred C. Milkert, Roselle, Iil., writes: “Last June I sharpened 256 lawn mowers for which I received $542.00,””

le de. i Faliscon aus Ti, Make big muey Uae t WB Have fun playing for dances,and rine for ot work. ter t . Shi frm Pacer ot ary Stich totes" Gas Bay get Pago pay for it. You can be erms. Write for 30-Da: ja! Offer and bi > > ; ‘ ‘ OTTAWA MANUFACTURING COMPANY rea y In sixty days with a

1741-W Wood Street, Ottawa, Kan. L__rcom 1741-W Magee Bidg., Pittsburgh, Pa__|

If you can whistle a tune you can learn to play a Buescher. 3 lessons given on request with each Buescher Sax’ give you . quick,easy start. Many learn scales bese hour, | Every Electrical play tunes first week, with their.Bueschers. Connection needs mld apy i —_ Solderall for pei fec t reception Easy to Play — Easy to ‘Pay __ The SOLDERALL CO., NEWARK NJ} Take any Buescher Instrument home for six days’ trial.See whatyou can do. If you decide to keep it pay a little each month. Send for Beautiful Catalog and details of this liberal plan. No obligation. Mail the coupon today. BUESCHER BAND INSTRUMENT Co. “THE SHOOTER’S ART’”’ Tells how to hold, Everything in Band and Orchestra Instruments

| aim and handle | - rifles; helps you guide others in correct knowledge of } 2011 Buescher Block Elkhart, Indiana pune ieee facts that make crack shots. Contains Send Se eee ee eee ee = -— 41 vety and common sense instruction every parent and - . - — e ea) at America s OriginalA ir Rifle D> cs 1s k Mé : dealer Name ] a , a your ’aleT $ A +’ seamin® Dor sent postpat1, Write! , Addres | S Air Rifle & Mfg. Co., etl i.Sneiey,St.Leule,Me, “SQM | | OOS SS eee ee , Chicago

Page 280

POPULAR MECHANICS ADVERTISING SECTION vacation time Pocket Gen HATEVER you do, wherever you go, you need a reliable watch that’s sturdy enough for a vigorous outdoor life. Pocket Ben is that kind. He’ll help you plan your days and hours to get the most fun out of the shortest time. Sold everywhere for $1.50. With lumi- nous day-and-night dial, $2.25. WESTERN CLOCK COMPANY LaSalle, Illinois FE Se Glorious sport with this speedy square stern canoe Ir you want a light, sturdy motor-boat, a boat of unusual speed and greatest economy, get one of these “Old Town” Square Stern Sponson Canoes and equip it with a portable motor. In this jaunty little craft you can fairly shoot across the surface of the water. “Old Town” Square Stern Sponson Canoes are unsurpassed in durability too. Carefully constructed of the finest selected materials and thoroughly reinforced. Free illustrated catalog gives prices and complete information about sailing canoes, square stern canoes for outboard motors, din- ghies, etc. Write today. Orn Town Cano: Co., 1766 Middle St., Old Town, Maine. ‘Old lone, Canoes. EASY way! = Ss 7 Catch Fish, Lobsters, Eels, Crabs etc. in large numbers. Also Skur ks Weasel, Mink, Muskrats and many other fur-bear'ng anima! * h my New Folding Galvanized S. They catch them like a fly-trap catches flies. Made in allsizes. Big money makers for trappers and fishermen. Write for Price List, Free Trap Offer, ani my Free Formuta for SGORY st bait known for attrac ting fish and enimals, _ J. F. GREGORY, Dept. 131, Lebanon, Mo, Bodies of Rare Beauty for Fords| At Factory Prices! Write for circular A-2 showing this De-Luxe Model and others. $22.7 P Sport Factories AURORA, ILL 100 SCALE PLANS for building old and modern ship models. Send 6 cents for catalog of plans, books, prints, maps and other things that smack of the sea. SEA ARTS GUILD, 405-A Eleventh Avenue, MILWAUKEE, WIS AGENTS ?ror PROFIT GENUINE GOLD LEAF LETTERS guaranteed to never tarnish. Anyone can put on stores and office windows. Enormous deman®, large profits. Paul Clark says: Smallest day $2 R. L. Reel made $920 in two months. Write ' for free sample and liberal offer to general #¢ METALLIC LETTER CO., 433-B N. Clark St., eieneo | | | | | em

Page 281

POPULAR MECHANICS ADVERTISING SECTION 135

et TELLS ALL ABOUT THE *© 15 New Features | as N 13 the many other features of the wonderful Biotes that thrilled the world in 1926 by its remarkable speed ang power You will want to’ know especially about “The Pilot” —a NEW device that steers your boatin any course you se — straight or curved, without —— —_ a = .. Leaves you free to cast, or troll or rest. T LOCKWOOD We Studied Years FORMERLV B ‘) AT &) MOTOR To correct the mistakes of old-type shaving preparations for you— now also offers you other oo “ego Cee. need ie tae ae, ee lease accept a 10-day tube of Convenience and Durability, Find out all about em be- almolive Shaving Cream to try

fore you choose any Motor, t acts now. WRITE FOR FREE FOLDER GENTLE - Just out — See how Lockwood is blazing the B.. sENTLEMEN : " advanced engineering methods backed by 23 cnn Palmolive Shaving Cream is a_ truly marine 9c building experience. ero) ; unique creation. [oO KWo ©D We made it up to meet the supreme desires of 1000 men whose ideals of a shaving cream r¢ CK wee oS | we asked. Owna CORONA ,_ f e portable typewriter years of soap st udy, we put into this prepara- ~ T Fat an office ma- tion. 0 Skunks ine. Has four-row key-

The result was a_ business sensation. Palmolive Shaving Cream rose, almost in-

oe board and big-machine stantly, to a leading position in its highly akers for tures throughout, competitive field. iffer, Vrite to gy fish and ‘ mn, Mo. LC Conthond Cossnn Tygeeeiee: These 5 adv antages — . Washington St, Syracuse,'N. Y. 1. Multiplies itself in lather 250 times. ords 2. Softens the beard in one minute. 3. Maintains its creamy fullness for 10 Valspar Lacqu er gives chairs, tables, cabinet, minutes on the face wood w eautiful satin finish in any c r > > rec 7 | Easy to apply —dries in minutes. Send 20c for 4. Strong bubbles hold the hairs erect for sample Hed, ne. Grose, ¥gilow, Granee Lilac, cutting. ywwn, lvory, Coral, Gray, c ite len- —. . , tine & Co., 450 Fourth Avenue New York NY. 5. Fine after-effects due to palm and olive oil content. Just send coupon Your present method may suit you well. But still there may be a better one. This test

: acnener ne may mean much to you in comfort. Send the Any coupon before you forget. aiOe sand THE PALMOLIVE-PEET COMPANY, CHICAGO, ILL. oe 3581 x, WiS | Need | 10 SHAVES FREE and a can of Palmolive After Shaving Talc

The BEST that || Simply insert your name_ and address and mail to TERS Skill and Experience can Produce ! — te 335 re live, 3) . 7 —e yes , Ill | esidents © isconsin should address almolive, | TWO BIG FACTORIES | ‘-iiaen te put the Our complete line of 22 models offers you a variety to ] “demand, choose from. Prompt shipment from factory to you. | ay $28.7 Catalog Free—Save Money —Order by Mail rite tods Please state kind of boat in which you are interested. al ¢ aon _ im MPSON BROS. BOAT MFG. CO, (20) (Please print your name and address) cece SiN (either place) ** “Hdworn "N° |

Page 282

POPULAR MECHANICS ADVERTISING SECTION The Old Reliable Credit jJewclers Genuine y meee Guaranteed DIAMONDS CASH OR ied os a Buy At mporter” s Prices! Save big money hae from Loftis, the Direct importer. Our Diamonds are world renowned for beauty and brilliance; all are blue white, carefully se- lected gems, set in mountings of solid 18-k white gold, exquisitely hand engraved. Satisfaction guaranteed, or money back. Goods sent for your free examination on request. Credit terms: Pay one- tenth down; balance weekly, semi-monthly, or monthly at your convenience. All goods delivered on payment. SEND TODAY FOR OUR FREE CATALOG mn. HN sill, Wedding Rings WS ot No. 824 — The Felite’ solid 18-k white gold - Set with 3 Diesents, $22.50; aT Ee 5 0;1Diamonde, $42.50; 9 Diamonds, $52.50 12 Diamonds $67.50. 9 Jewel! Adjusted Wal- ) a. No. 846—14-k white gold filled; assorted pat- terns, $42. 60, $4.25 down and No. 857—Ladies’ Wrist Watch, $100 eS gold, 15 Jewels. e .sOo— " $2.75 down $275 month week Railroad Watches—Guaranteed to Pass Inspection HAMILTON NO. 992. 21 Jewels. Positions. cae filled 25-Year y Case ELGIN'S aTEST RAYMOND, 21 Jewels, x ms ments. Rune 40 hours one winding Geld Sled 20- Teer Quality Ca Jase -~ +e ee Prices Soest ENS , ™ WILL SAVE You We own our own steel mills, roll our own sheets, make them into high-grade REO METAL SHINGLES, Sidings, Ceil- ings and Roofings of every type and style for every kind of building. We control every operation from the raw ma- terial to the finished roof and we sell direct from our fac- tories to the user. Not a dollar to divide with anybody but the customer! You get better value for less money. OUTLAST THREE ORDINARY ROOFS EDWARDS METAL ROOFS are weather-proof, light- ning-proof, fire-proof! The galvanizing bends with the metal. No tools required. LOW-COST ALL-METAL GARAGES Any size. Any style. Port- able. Ready to erect. Com- plete with frames, doors, sash and hardware. Ornamental, durable, economical. Blue-prints and complete instructions FREE. Write today. Get our low prices and Free Samples. Ask for Roofing Book No.150 or for Garage Book No. 150 THE EDWARDS MFG. CO, 600-650 Butler St. Cincinnati, 0. Sport Bodies for Fords AT FACTORY PRICES! "too" $39. 30 Prime Write for Bo« i- ing Ot oe Mo SPORT FACTORIES, AURORA, ILL. For all who hunt, fish, sail, motor, camp oui or study bird life. Unexcelled for use in the movie and theatre or atoutdoor games. Magnifies 6 times. akes distant objects large and clear—brings the world to your feet. Precise optical qualities. Sane finish. Carrying case included. At your dealer or direct, postpaid. HE POCKET e.escore A. practical six power telescope. Made on the same formela as the Biascope, serving similar purposes. Neat leather case. At your dealer or direct, postpaid. Money back guarantee. WOLLENSAK OPTICAL COMPANY 894 Hudson Avenue : : : +: Rochester, N. Y. Manufacturers of Binoculars, Telescopes, Microscopes, Photographic Lenses of High Quality. SHAW MOTOR ATTACHMENT MAKES YOUR BIKE A MOTORCYCLE! A high grade 24% H. P. motor attachment quickly clamped ou any bike frame. Speed 4 to 40 miles an hour. 90 to 125 miles per gallon of gas. Special Low Price Now! Write today ‘sw for Complete Description and Specia! ING Low Prices on SHaw Motor Attachments — Mw Bad Camplete Motorbicycle \7% vCane COMPANY jesburg, Kansas RAISE BELGIAN HARES NEW ZEALAND REDS—Chinchillas—Fiemish Giants MAKE BIG MONEY—We stock and pay = following prices for all you raise: elgik n Gare $ - New Zeaiands $3 each—Chinchillas $4 eact Pile r $5 each. 32 ge \Srantembed book, catalog and « ract, als copy of Fur Farming magazine, telle how to raise skunk mink, fox, etc., for big profits,all for 10c. Address OUTDOOR ENTERPRISE CO., Box 25, Holmes Park, Mo. makes— petra emington, Oliver= to almost half. 2 and it’s yours All late models, completely rebuilt and re- ished brand new. GUARANTEED for ten . EARS. Send no power —big FREE cata : shows actual mac hines in fu nfl colors , Seow direct -to you easy pay- pt oe 10-day f free trial o Limited ime #0 write today. eset Sasondlar Ex,, oy w. Lake St., Dept. 694, Chiceso Te feeeirii ss th hee ; 19 eC" | 2

Page 283

POPULAR MECHANICS ADVERTISING SECTION A successful shave is YOu made up of three things — = a good brush, a AMEN a good lather, ete lee and a good razor. We will supply the first > requirement with a Even outdoors—hair never out of place! \ WHITING - , ADAMS STRIKE ulcan Rubber-Cemented Yo Uu 4 ve O u t! Shaving Brush nin then tunes tere One, two, three—Out! He didn’t have This famous name on a shav- a chance. ing brush is a guarantee — Your unruly hair hasn’t a chance, you are getting a good bru either, when you use—Stacomb! Go = into action with this modern dressing and you can give those stubborn cow- licks the one-two-three every time they come to bat! Stacomb is the hair dressing which more fellows rely on than any other. And here’s the reason— , Stacomb really does keep your hair smoothly W H | | | a | GA Dy.’ wy | S in place. There simply isn’t any argument. But more!—Stacomb brings out the natural T lustre of your hair. Supplies the oils your hair B O S : O N needs. Never leaves it dried out, as frequent BRUSH MAKERS FOR 118 YEARS wetting with water does. Stacomb never makes your hair look gummy either. It is actually beneficial—it helps pre- $45 Buys This wert Cycle vent dandruff. Stacomb comes as a combing cream,—in It's a Harley-Davidson, 16 H. P., twin jars and tubes,—and now in the popular new chain drive, magneto and clutch. It ’ : liquid form as well. All drug stores has power and can get up and ge F 7 the open road at a speed which thrills, This is only one of hundreds of bar- gainsin used motor cycles which you ; : =i ean get. Be nd for Free r atalog.” ae a FREE pt - St ne E OFFER ' ILL. Oliver Cycle & Motor Co., 1045 N. Grand Ave., St. Louis, Mo. ———— ENT } Standard Laboratories, Inc., Dept. BB-8, 113 W. 18th Street, New York. Ef +d Send me free sample of Stacomb as checked :— apes | Original, cream form [ New liquid form 0 ee, © MR. 0. sc scanasces saeeuadsseseseseses bate enwen Pay As Low As $2.00 per Week . Hendersons, Harley -Davidsons, Indians . Slightly used and rebuilt. Hundreds to select from. ——_—— Send 10c for list today. RES MYEROW BROS. CO., 15 Berkeley St., Boston, Mass., U. S. A. HO M ate S nc | HOW ABOY BUILT UP A GREAT sqUABFARM | | eee $10°G25a Day res § no money, now has $30,000 plant, ships to emis Giante 7 | ann York 150 bbis. squabs yearly, receiving a contract, also $75 to $100 a barrel. You can do the same : te li F 1 ng . Send for this book. Price is fifty cents but we a e ng res y will mail it to you for the names and addresses ark, Mo. La hee eee ate St cow one cone ont & Roasted Peanuts Wherever you find a crowd, hot, = savory peanuts and crisp, sweet popcorn are in demand. Set up a Kingery Machine anywhere — in stores, at ball games, races, fairs. Profits 60% to 100°. Machines take little room; are easy and inexpensive to operate ~ : [3s mobile tires $3. oe Barbecue machines, too. Write now for Free Catalog. Free ' ' “ ROCHESTER, Wi . Dept. PM4, 410 E. Pear! St. Trial Z : The Kingery Mfg. Co. CINCINNATI, OHIO Chicago

Page 284

138 POPULAR MECHANICS ADVERTISING SECTION Five Reasons Why Mechanics Prefer the /restOGze Blow Torch Stand it on end, or hold it in any posi- tion—the Prest-O- Torch excels in con- venience as well as speed. Write for details, mentioning the class of work you do. “J MADE $21.00 IN FIVE HOURS” Writes Peter Werne ** Better-} Shirts for Large Manufacturer No capital or Spare or Cash bonuses. WRITE FOR FREE SAMPLES MADISON SHIRT MILLS, 6562 Broadway, New York Sell Madison direct to wearer. experience needed. full time. Prest-O-Lite is Quicker. No pumping, no generating, no pre-heating. Just turn on the gas and get busy. It is Safer. No liquid fuel to spill and ignite. Fire-hazard reduced to a minimum. It is Rugged. No delicate complicated parts requiring repairs or replacements. It is Inexpensive. Simply ex- change an empty tank for a full one (paying for the gas only)atany Prest-O-Lite Gas exchangestation throughout the country. There are more than 15,000 of them. Best for Every Blow-Torch Purpose. Gives you a wide range of heat under perfect, focused control. THE PREST-O-LITE CO., Inc. - Indianapolis New York - San Francisco In Canada, Prest-O-Lite Company of Canada, Ltd., Toronto, Ontario Unit of Carbide and Carbon Corporation rest O-Lite Gas The Gas of a If You Are A mm | worthy of the name and not afraid to : | work, I'll bet you $50 that you can’t work for us 30 days and earn less than $200. Think I’m bluffing? Then answer this ad and show me up. Openings for Managers. The “ der Box” sells on sight. TOM ade’? Free » Balletin lists diamonds as low as $60 per carat, Low Baerga io'574 lees 1-18 Bargain This t correctly eut di: =) y biazing solitaire at 50. This 75 oldet Largeat Bramond Be niang m all the wor id tends on giamonda. yt paid other cash deals direct with European pareaine, Many trom Must sel) NO WHY PAY FULL PRICES Costs Nothing to See Diamond sent for absolutely free examination at our az. No obligation. No oo Latest Listings— firs tosepee vara your copy Use blank eles. clip ad and thousand Uses AN Won- an ee F youn FORD Into The ‘‘LARK” $500 Red-i-Kut life size patterns 38-inch Easy Riding Seat | and new manual of other distinctive sport body patterns ndehields. wing-Lo” irons, Topsand Wi Famous sure-fit RED-1-K life-size patterns and 5 instructions show how ean easily conv i into this Fast, Saucy, Sport Class—Snap 4-passenger car. 4 coin for actual bo« ny photo from $3.80 up—" RKO’ ORDER RIGHT NOW KUEMPEL COMPANY, 85 Kuempe! Bidg., GUTTENBERG, IOWA Information on any book free. Write Popular Mechanics Press, Chicago, Ill. Good commissions. week. Dept. T-6, Average 1,000 samples furnished. THE NATIONAL IMPORTING CO. - . 569-573 Broadway, N. Y. C. 1000 Beaut Just show women this exquisite display of dress goods, silks, wash fabrics und you can’t keep them from buying. agents needed to devote Men and women full or spare time. $40 to $85 a Write quickly.

Page 285

POPULAR MECHANICS ADVERTISING SECTION EVINRUDING/ No Traffic «Every lide a Vacation WELVE to 15 miles per hour with the Evinrude Fastwin gives the same thrill as 45 with your car. Carried in one hand—weighs only 49 pounds, develops 4 H. P., attaches to any boat in minute. Three other modeis—S H. P. Speeditwin 75 Ibs.; 24% H. P. Sportwin 44 Ibs.: and 2 H. P. Utility Single. Speeditwin, on hydroplane, delivers 15 to 27 miles per hour. Exclusive, copyrighted * Boat Speed Guide" tells at a glance which motor will give you the results you want. Standard- ized down-payment of only $30 on any model. Standardized, low monthly terms —a long time to pay. Free Trial Guarantee 4 refunds money if not satisfied. That's FREE! New Evinrude the confidence we have in Evinrude superi- Year ority and in your liking this sport. Every Motors in actual col outing a real vacation. No traffic rules, no 40 interesting way to be reckless. More room than in ’ auti- r pages eter Se your car—new things to see, new places wanes to go. records og or tree - copy today- EVINRUDE MOTOR COMPANY 2404 27th St. Milwaukee, Wis. Beautiful HOUSES $9) and BUNGALOWS ‘ CAN BE BUILT FOR AND UP Th lmany others in my new book, B ig Plans for Modern Homes, will ve 1 hundreds of dollars. One of the uplete and comprehensive books ever published by any architect. litionjust off the press. Nearly 600 ns and photographs of Colonial FREDE RICK H. cow ING ARCHITECT ecords ngalows, etc., costing from ves sizes and cost to build up: give Sent postpaid for $3.00. 101 Tremont St., BOSTON, MASS. ‘AGENTS AND SIGN MEN Now Making $50.00 to $100.00 and Up Per Week Selling Our GOLD LEAF SIGN LETTERS For store and office windows, board signs, trucks and glass signs. We also make to order script signs and business emblems singly or by the thousands. A permanent business. No capital or experience required. Big demand in every city. Samples and Literature Free. CONSOLIDATED SIGN LETTER C0. ©@ivéa¢o. i°” Every muscle out of kilter More muscles aching than you 1ew you had—scraped shin, cratched hand—sun burn. Apply Absorbine, Jr. for clief — soothing, healing, cleansing, antiseptic. It is a powerful liniment. $1.25 at your druggist's. W_F. YOUNG, Inc, Springfield, Mass. » = AT 3 LIIZE REG U.S OAT. OFF **Bill Carola’’ Couldn’t Note—Now Makes $100 a week **When I sent for your catalog, I didn’t know a note of music. A few months after I bought my Wurlitzer instrument I had taken my place in a professional orchestra. w I am making $100 a week, three times what I made as clerk. I wish everybody knew how easy it is— anyone who can whistle a tune can learn to play a musical instrument.’’ —Bill Carola Free Trial Easy Payments You may now have any Wurlitzer in- strument for an ample free trial in your own home. Examine the instrument, note the fine workmanship, the full, rich tone value and especially how easy it is toplay. No obligation to buy—no expense for the trial. We make this liberal offer because we want you to try for yourself a genuine Wurlitzer instrument, the result of 200 year’s ex- perience in musical instrument building. Easy payments are arranged to suit your convenience. This is your oppor- tunity to try a famous Wurlitzer instru- ment in your own home. Send for¢ Free Book Illustrates and describes every known musical instrument — more than 3000 articles, many of them shown in full * — colors. All genuine Wurlitzer instruments—buy direct from Wurlitzer and save money. Special offers on complete outfits. We also give you our Free Trial, Easy Payment Plan. No obligation. Send Coupon Today ! J The Rudolph Wurlitzer Co., Dept. A177 117 E. 4th St., Cincinnati 329 S. Wabash Ave., Chicago 120 W. 42nd St., New York 250 Stockton St., San Francisco Send me your Free Book on musical instruments. Also your Free Trial, Easy Payment Plan. No obligation. BE cccantinnnaimabinccsnntinnimantnwediens Instrument _____. Copyright 1927, The Rudolph Wurlitzer Co.

Page 286

POPULAR MECHANICS ADVERTISING SECTION Protect Your Ideas Take the First Step Today If you have a useful, practical, novel idea for any new article or for an improvement on an old one, you should communicate with a competent Registered Patent Attorney AT ONCE. Every year thousands of appli- cations for patents are filed in the U. 8. Patent Office. Frequently two or more applications are made for the same or substantially the same idea (even though the inventors may live in different sections of the country and be entirely unknown to one another). In such a case, the burden of proof rests upon the last application filed. Delays of even a few days in filing the application sometimes mean the loss of a patent. So lose no time. Get in touch with me at once by mailing the coupon on the opposite page. Prompt, Careful, Efficient Service This large, experienced organization devotes its entire time and atéemtion to patent and trade mark cases. Our offices are directly across the street from thé T S. Patent Office. We understand the technicalities of patent law. We know the r-tes | requirements of the Patent Office. We can proceed in the quickest, safest and best ways in preparing an application for a patent covering your idea. Our success has been built on the strength of careful, efficient, satisfactory service to inventors and trademark owners located in every state in the Union. NO CHARGE for Information On How to Proceed The booklet shown here contains valuable information rel:ting to patent procedure that every inventor should have. And with it I will also send you my “ Record of Invention”’ form on which you can sketch your idea and establish its date before a witness. Such evidence may later prove valuable to you. Simply mail the coupon and I will send you the booklet. and the “ Record of Invention” form, together with detailed information on how to proceed and the costs involved. Do this NOW. No need to lose a minute’s time. The coupon will bring you complete information entirely without charge or obligation. 7 ,

Page 287

POPULAR MECHANICS ADVERTISING SECTION My Patent Law Offices Just Across Street From U.S. Pat. Office Above is a view of my draft- ing and specification offices where a large staff of ex- perienced experts are in my constant employ. All drawings and specifications are prepared under my nventors sa supervision. [nile forte, Free Strict Secrecy Preserved \ll communications, sketches, drawings, etc., OO e held in strictest confidence in strong, steel, fireproof files, which are accessible only to thorized members of my staff. Feel free to write me fully and frankly. Your case will have my personal attention. It is probable t I can help you. Highest references. But FIRST—clip the coupon and get my free book. Do THAT right now 9 ht : . ‘ Clarence A. O’Brien TRECORD OF INVENTION Registered Patent. ..ornev ea." : } Member of Bar of: Supreme, Court of the United States; Court of Appeals, District of Columbia; Supreme Court, District of Columbia; United States Court of Claims. Practice confined exclusively to Patents, r'rade marks and Copyrights \ i . . | »’ Clip this Coupon wd Mail it PQlow/ | CLARENCE A. O’BRIEN, Registered Patent Attorney 70-Y Security Savings and Commercial Bank Bidg., Washington, D. C. Please send me your free book, “ How to Obtain a Patent,” and your “Record of Invention’ form without any cost or obligation on my part. , Name.. (Important: Write or Print name clearly.) Address ee ae

Page 288

POPULAR MECHANICS ADVERTISING SECTION TENT TRADE-MARKS A COPYRIGHTS Have You An Idea? Our Offer: Son iene YOUR FIRST STEP Before disclosing an invention the inventor should write for our blank form , “RECORD OF INVENTION” This should be signed and witnessed and returned to us together with model or sketch and description of the invention for INSPECTION and INSTRUCTIONS No Charge for the Above Information ) Our Four Books Mailed Free to Inventors Our Illustrated Guide BOOK HowtoObtainaPatent Contains full instructions regarding U.S. Patents. Our Methods, Terms, and 100 Mechanical Move- ments illustrated and described. Our Trade Mark Book Shows value and necessity of Trade Mark Protection. Information regarding Trade Marks and unfair com petition in trade. Our Foreign Book We have Direct Agencies in Foreign Countries, and se- cure Foreign Patents in shortest time and lowest cost. Progress of Invention Description of World’s Most Pressing Prob- lems by Leading Scientists and Inventors. We Regard a Satisfied Client as our best advertise- ment, and furnish anyone, upon request, lists of clients in any state for whom we have secured patents. Highest References—Prompt Attention — Reasonable Terms VICTOR J.EVANS & CO. PATENT ATTORNEYS Main Offices: 956 9th St., N. W., Washington, D. C. Our Washington Of Opposite U. S. Patent Office

Page 289

POPULAR MECHANICS ADVERTISING SECTION PATEN 1D cooviieetn IMPORTANT TO HAVE YOUR CASE MADE SPECIAL AND AVOID DELAY YOU SHOULD HAVE YOUR CASE MADE SPECIAL IN OUR OFFICE to secure protection, save cor- respondence and secure early filing date in Patent Office. To secure special preparation of your case send $25.00 on account with model or sketch and description of invention. —] Chicago Office Suite 1114 Tacoma Building ' Our Pittsburgh Office Suite 514 Empire Buildirg MAIN OFFICE, VICTOR J. EVANS & CO.—VICTOR BUILDING, WASHINGTON, D. C. Our Lawyers Practice in all U. S. Courts and defend Clients in Suits involving Patents, Trademarks and Copyrights All Communications and | CUR ORGANIZATION OFFERS Data Strictly Confidential. | PERSONAL SERVICE | Interference and Infringe- | By Experienced Patent Lawyers, ment Suits Prosecuted Solicitors and Draftsmen | ea khe Yat / FREE) VICTOR J. EVANS & CO.| | COUPON PATENT ATTORNEYS NEW YORK OFFICES CHICAGO OFFICES 1007 Woolworth Bide. 1114 Tacoma Bldg. | PHILADELPHIA OFFICES PITTSBURGH OFFICES SAN FRANCISCO OFFICES | 714-715 Liberty Bidg. 514 Empire Bidg. Hobart Bidg. MAIN OFFICES: 956 9th Street, N. W., WASHINGTON, D. C. Gentlemen: Please send me Free of Charge your books as described on preceding page SES TORS TORSO amanaee ne > manimnea emp mm emre pummel cise c. | ines Se Tr al Our San Francisco Office Suite 1010 Hobart Building

Page 290

POPULAR MECHANICS ADVERTISING SECTION PATENTS Jame as it is important that you protect your idea with a patent, so it is imper- ative that your patent covers your invention completely. The one best way to assure this is to retain a reliable, experienced patent attorney MUNN @& CO, PATENT ATTORNEYS Associated for 81 years with the Scientific American 1572 SCIENTIFIC AMERICAN BLDG. 523 SCIENTIFIC AMERICAN BLDG. 24 West 40th Street, New York Washington, D. C. 1312 TOWER BUILDING 520 VAN NUYS BUILDING 655 HOBART BUILDING Chicago, Ill. Los Angeles, Cal. San Francisco, Cal. Ask for free copy of “Patents—A Book of Facts Every Inventor Should Know” and for “Inventor's Diary.” Send for them NOW. TrMrrarry Ate -Bewmreaeweraéaarraem Aenereeaeme4eeeeaer me en Mame a ee postma 10 day DEPT — Hi If s quest INV! factul

Page 291

POPULAR MECHANICS ADVERTISING SECTION PATENT Booklet Free Highest References Promptness Assured Best Results d drawing or model for preliminary examination of Patent Office records. ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION Listed Patent Lawyer in the latest editions of the Rand-McNally Directory of Bank- ers and Attorneys, of Chicago, Ill.; The Baggott & Ryall Directory of Attor- neys, New York City; The Lawyers Guaranteed Directory, Detroit, Michigan; The Lawyers and Bankers Quarterly, published by the Legal Directory Publish- ing Company of St. Louis, Mo.; the American Lawyers Annual, Cleveland, Ohio. WATSON E. COLEMAN, REGISTERED PATENT LAWYER Victor Bullding, 724 Ninth Street, N. W. WASHINGTON, D. C. 1000 NEEDED INVENTIONS: g I he most remarkable book ever offered to inventors. One ie i needed inventions listed and described. Arranged as follows "General Problems; Automotive; Mechanical; Electrical; Chemical; Radio; Marine. Separate chapter on the Ten Most Needed Inventions. This may give you one idea that will win you a fortune. Nothing else like it has ever been published. Compiled at enormous expense. ery | Raymond Francis Yates, for merly Managing Editor of a leading scientific maga- zine. Over 100 pages, durably bound. Send no money. Pay postmar 1 only $1.00 plus postage on arrival. Money back after 10 days’ examination if desired. Limited edition. rite NOW. BUREAU OF INVENTIVE SCIENCE DEPT 36 ROCHESTER, NEW YORK Have You An Invention? If so the WORLD PROGRESS will send you upon re- quest sample copy Free containing SUGGESTIONS TO INVENTORS as to Inventions Needed. Weinvite manu- facturers to address us regarding inventions they want. Subscription for one year 60 cents WORLD PROGRESS PUB. CO., Inc. Room 203 Victor Bidg. WASHINGTON, D. C. PATENTS Send us sketch or model for advice on8 anak Marks, Foreign Patents.“Copyrights, etc.; gives infor- mation on Patent Procedure: tells what every inventor should know. Thousands of Inventors, who are our clients, are our reference. CHANDLEE & CHANDLEE, 25 Years’ Experience 473 7th St. Washington, D. C. P| lad [ “2 cost of patent. Our book “Hew te Obtain a Patent”’ tee )@ Sent free. It tells how to apply for Patents, = de } To the Man with an Idea I offer a comprehensive, experienced, effi- cient service for his prompt, legal protec- tion and the development of his proposition. Send sketch, or model and description, for advice as to cost, search through prior United States patents, etc. Preliminary advice gladly furnished without charge. My experience and familiarity with various arts frequently enable me to accurately advise clients as to probable patentabil- ity before they go to any expense. Booklet of valuable information and form for properly disclosing your idea free on request. Write today. Richard B. Owen, Patent Lawyer 9-303 Owen Bldg., Washington, D.C. 41-E Park Row, New York City TRADE -MARKS REGISTERED invention for INSTRUCTIONS. No charge for the above information. RANDOLPH & CO. a Bldg., WASHINGTON, D.C. se City s INVENTORS voc bes Send for our Guide Book, HOW TO GET A PATENT, and Evidence of Invention Blank, sent Free on request. Tells our terms, methods, etc. Send model or sketch and description of your STOR CR PSR RERSEESE ESE SESESEESEESECRSESSESSSTESESSESS SERS ER Eee STREET

Page 292

POPULAR MECHANICS ADVERTISING SECTION o-63 5 blue-white dia- monds in 18 karat white $32 2 $8.15 2 month. @-S2 AAl1 blue-white diamond in _ Ladies’ En- ent Ring. G-s3 Digevwbite | = monde in 18 karat $39.98" fice month. PATENTS Don’t Lose Your Rights To Patent Protection Before disclosing your invention to anyone send - blank form “EVIDENCE OF CONCEPTION” ¢ signed and witnessed. As registered patent attorneys we represent hundreds of inventors all over the United States and Canada in the advancement of inventions The form “Evidence of Conception,” sample, instryc- tions relating to obtaining of patents and schedule of fees sent upon request. LANCASTER & ALLWINE 480 Ouray Bidg. WASHINGTON, D. c. Originators of forms *‘Evtdence of Conception.” Will Finance Patents Patents of commercial value financed on royalty basis without expense to inventor. Mail models and copies of patents or full details to KAMSTONE HOLDING a: 41 East 42nd Street PATENTS Trade Marks, Copyrights, Patent Litigation Handbook with illustrations, 100 mechanical movements. Sent free on request. ALBERT E. DIETERICH formerly member examining corps U. S. Patent Office PATENT LAWYER and SOLICITOR 621-A, Ouray Bldg. 27 Years’ Experience Washington, D. C. Bearings, Belting, Blue Prints, Books on Mechanical and Scientific Subjects, Brass Castings, Compressors, Gears, F Lathes, Motors, Saws, Shafting, and or Supplies of every kind for MODEL MAKERS and HANDY MEN Handy Complete Catalogue 25¢ which is allowed on first §2 order Men Amalgamated Sales and Service Corporation 327A South La Salle St, Chicago, Ill, U.S.A Materials J The man who studies gets ahead. Popular Mechanics Press will advise you what books to read to advance in your trade. 200 East Ontario Street, Chicago, Illinois. PATENTS #etee service noted for results, eviden any well known value. om "Patent-Sence. fo fests G46 F Ste Wash., D.C, Estab. 1869, THIS WONDERFUL INVENTION converts any ordinary cook stove into a gas stove. OXO-GAS is made from kerosene and air. Cheaper, cleaner and more effi- cient than coal. Responsible distributors wanted. GLORIA LIGHT CO. 111-6N. May St. Chicago, Il, Build and Fly Model Aeroplanes Build your own Model Aeroplane; make trial Qighte and learn the principles of Aeronautics, IDEAL Scale Drawings and Building and Flying Instructions help you build exact 3-ft. duplicates of any of the following well-known Planes. Send 25c¢ now for om, lete Plans for the one you want to bu veryboy’s Airpla nN All parts ready to put together tor; without nails, wire or glue B% pea a i Cecil Peoli Racer; ft. wing spread; Monoplane type 25 cents each, postps e Guaranteed to 5% Complete « oo ad IDEAL Model Aeroplanes outfit, prepaid, and Supplies, &c postpaid. IDEAL AEROPLANE ry SUPPLY CO., 408 West Broadway, corner Spring St., NEW YORK BLUE BOOK ON PATENTS AND PRIORITY RECORD BLANK GRATIS OE E. MILLER PATENT LAWY ER piey wed Building, 4 SHINGTON, D. ELECTRICAL AND MECHA MEDAL EXPERT Inventors and Mechanics >| Send 10 cents in stamps for Material Catalog odin GEAR & MFG. CO. 98 Holmes St., Quincy, Mass. aan A MOTORCYCLE OUT OF YOUR BICYCLE wi 2 —4 AH tel MOTOR ATTACHMENT N LL BLE— ECONOMICAL — EFFICIEN! ae Fits any wheel. Send stamp for circ" STEFFEY MFG. CO. bul, P, 3924 Fairmount Ave., Phila., Pa. Great New [Invention for Seekers of Health—Power—Beauty Elco Electric Health ere Generates High Frequency Violet Ray, Mechanical Vibr® ~ Medical Electricity, and Ozone. Four of Nature's Gres' Curative Agents, For Home Treatments at less * cents per year - FREE BOOK ; ‘Health, Power, Beauty’’ describing ' Great New Invention. Re-vitalize you self. Bring back energy. Be whally alive. Write Lindstrom & Co., 30 W. Lake St., Dept. A-135, Chicate | SE This Devil ment sity doub! ol give a Write for Thi derful Dire. Factor free ty ality

Page 293

ks on jects, rears, and IDEL 5 Chicage el POPULAR MECHANICS ADVERTISING SECTION AGENTS SALESMEN MANAGERS Experience Unnecessary SEND FOR FREE pone 1 ‘EVOLUTIONARY DISCOVERY in “Tube Repairs” Devils Grip—thie MASTER STROKE of Scientific acc omplish- ment —this new, legitimate, -4 le, fast-moving motor car neces- sity of insignificant price, abes it possible for absolutely anyone make Big Money steadil ne permanently, as our representa- ve. YOU EARN ‘ EA N $100 ‘EACH WEEK UP We want _ — salesmen, to take part in the nation- wide distribution of this outstandin pte he at G the automotive accessory field. EXPERIENCE XESN'T \MATTER. Men from ALL WALKS OF LIFE may benefit by this remarkable opportunity. Anyone with ambition and a sincere desire to get ahead can accomplish abundant success. For we make it doubly easy with the most astounding selling arrangement the world has ever known. We allow you to sweeten each sale a REX VISION FILTER FREE (Ends terror of blinding headlights) as an introductory premium and tht us present every customer with an irresistible bargain— double value—twice the money's worth. It is not a question oi—“Can You Sell.” It would fit much better to ask—Can you give away to motorists a high grade necessary accesso A + they want and will have the moment they see it. With this added in- duce € at you are enabled to make A REMARKABLE SOLICI- A ‘SOLICITATION—A SALE AND A PROFIT EVERY 6 MINUTES We have a FREE SAMPLE waiting to send you postpaid by return nail. Let **Devils Grip’’ reveal its own positive worth and amazing t satisfies an ever-existing, ever-repeating, We want more men to supply car owners, ages, auto accessory stores, etc. FULL OR Exclusive territory. If you want to earn Bid ener and earn it Fast in a clean, dignified occupation, Write For Your Free Sample and full particulars today. Do It Now, while the opportunity is still open. REX RUBBER MFG. CO., 102 Sears Bidg., Chicago, U.S. A. PLUMBING - HEATING WATER SYSTEMS SAVE AVE UP TO 40% onderful bargai SEND FOR B. KAROL & SONS CO, cme So Etiches e-Single Dial DIG SET Write TODAY for This Won- dertul Offer Direct from Factory! World's greatest Perfect working, single dial control, e receiver, shipped to your home for 30 @. free trial. Test it for distance, volume and toral (juality—and if you are not convinced that it is the best single dial set you ever heard, return it to factory. Metrodyne Super-Seven Assembied Mn ne dial tunes in all stations. Get 1,000 to 3, = ‘es on loud speaker. Easiest set to operate. gh- st grade parts used. Magnificent Two-tone Walnut Cabinet. Big Profits to Agents and Dealers ~ 1g neem radios. All or part time. Great money makin portunit Sap cerating set on 30 days’ free trial, WRIT FOR OUR OF METRO ELECTRIC Co. 2161 N. California Ave., Dept. 146 CHICAGO, ILLINOIS 1 IWant toSend You a Santa Te Special- Wa{ch - Zebu (ayet to see and examine Santa Fe Special Watches are today be- ing shipped to every civilized country in the world, a are prob- ably the best and most favorably known watch in both Army and Navy. In addition to our NEW LOW PRICE, I will send for your approval one of these Standard Watches, guar- anteed for a lifetime of satisfactory service, not only by the Santa Fe Watch Company, but by the Great Illinois Watch Factory. So accurate, Government officials carry them; so pectece and beautiful, jewel- ers say they are worth 1-3 to 1-2 more than we ask for them. I will send you one to see WITHOUT ONE PENNY DOWN—allow you to wear it 30 days FREE then sell it to you on easy payments. WHY NOT OWN A 21 JEWEL SANTA FE SPECIAL WATCH? You will never miss the few cents a day that will make you Own one of these watches—SEND FOR WATCH BOOK—illustrating in beautiful colors hundreds of designs and combinations in cases in the POCKET W: 7H, MEN’S STRAP WATCH and LADIES’ WRIST WATCH. You can have your name or mono- gram and any emblem you may desire engraved in the Case to suit your own ideas. Write today for Free Watch Book, and make your selection at once, while this offer lasts. A limited offer! With every Santa Fe Special, FREE beautiful gold chain or strand of exquisite pearis. W rite today. Matl coupon for both Watch and Diamond Catalog 66 Thomas Building Topeka, Kans. (Home of the Great Santa Fe Railway) Mail al / SANTA FE WATCH COMPANY 66 Thomas Building, Topeka, Kansas Watch Book Free, explaining your No to- 7 Money Down" Offer on the Santa Fe Special Watch SANTA FE WATCH COMPANY coupon / Please send prepaid and without obligation vay Name ft Address / City 4

Page 294

148 POPULAR MECHANICS ADVERTISING SECTION BUILD and RACE THIS MODEL of the WORLD’S FAMOUS INTERNATIONAL STAR CLASS Construction set consists of all wooden parts shaped, sails, keel, mast deck, screws, glue, small plane, sandpaper and very complete instruc. tions—28 inches over all. Price of complete set.................. $8.00 F. O. B. New York Our complete catalog (worth 25c) will be sent free with every order for a Star Construction Set. Contains useful information to all model makers, also complete line of engines, boilers, fittings, power boats. sail boats and ship plans. BOUCHER, INC. **."3°32u Avste= AGENTS prorits Tires Hammered Full of Nails, | ii Leak no Air. GALACITE a new | Ad a\\)| Viscous Pneumatics Cement (2s (NOT A 1D Vv, " » TE) Seals PUNCTURES Instantly j \= ‘if -the very moment they occur. One ap- lication made in a minute without akingtireoff wheel orrimdoesthe work. slow leaks and porous tubes.Gala- cite aids in preserving rubber often doubling Tire Mileage. Don’t confuse with anything else intended for the same purpose. Galacite | clean and scientifically correct. Made | by along established, highly rated fin- / | | ancially responsible concern. . ef Wir CFR MOTORING wear an Ingersoll | Wrist Watch. The jolts and jars of driving don’t affect its timing | See | f ti id trouble. dependability the way they do the | AGENTS ** wilt pay vou to get the facts . and them NOW. You can’t more delicate watches. get richin an hour but youcan make immedi- ° ‘ ate,sure, steady profits are amazing. No tatk- And in case of accident, you can ing., Just drive oaile in, an old tire, We back our get it repaired quickly and at a FREE SAMPLE Fel! particulars, big Sub. ] b di i h RE book and a free sample will be very ow cost Dy sending it to the sent you postpaid, by return mail. Territory is going Ingersoll Service Department, SONNSON ECO. 19 W. Jackson Biva. Dept. 694, CHICAGO Waterbury, Conn. -_ BOW LEGS?” Wrist Radiolite, tells time ‘1the OUR GARTER (Pat'd) dark, $4.00. Dealers everywhere. ’ Makes Trousers Hang Straight INGERSOLL WatcH Co., Inc, j If Legs Bend In or Out. Self Adjustable. New York + Chicago + San Francisco Free Booklet — Plain Sealed Envelope THE T. GARTER Co. Ohew Hempshire All You Need for Balloon Tire Repairing Write for New Free Booklet If you are interested in adding to your vulcanizing equip- ment—planning to add a repair department or start a shop | —take the first step NOW. Get this new book! All the essen- | tial information with equipment illustrated and clearly de- | scribed. Every day brings more tires on the road—more repair work necessa! | j —more profits for you if you are ready. Write for this book—unless are one of the many who wait and put things off to let others pro! The Shaler Company, 2706 Fourth St., Waupun, Wis. —— trey i a i i es

Page 295

POPULAR MECHANICS ADVERTISING SECTION ¢ . Nothing else will do—to insure self-adjusting i} rst filament control, utmost tube performance, longest tube life. Insist on Amperite. Elimi- nates hand rheostats. Simplifies wiring. Price $1.10 smplete. Sold everywhere. Write for Free Radiall = Book giving season’s popular | Bt ; hook-ups and construction : 9 data to Dept. P. M. 6. RADIALL COMPANY 50 Franklin St. “‘Made $93 my first week. Since then I have been New York — over $100 every week selling Stay-Prest - atterson, lowa. MEN oR WomMEN $123 “Wo $14 ‘I worked six days six hours each day, aes eee and made $128 quick cash profit my First Two Hours | first wee ave been going strong ’ ‘ m | over nince Stay Pr vest ie the best euler 5. D. Mathews, Minn., trying A THIS 100 PAGE) ever.”"— ARNER, Iowa. Stay-F rest as a side line made $54 First thy as two hours. Now sells Two Days . R. E. Bendine, Kentucky, who had never had any eelling experience, made $54 $39 his first two days with this big profit maker. s are Time FirstiWeek CATALOG QD Very First wf e Day CG. M. rom. ¥- Va., wee e ” selling Stay-Prest in spare time $53 the fret day Moke tried selling = and made $39 first week. Now Prest. a full time success. Ts . | New / cae Brest | INVENTION m0 Bee 8 “Build your own with ‘RASCO’ Parts”’ RADIO SPECIALTY CO., 98 E Park Place, New York, N.Y Trouser Presser Keeps pongo always pressed. Puts in knife-edged creases, removes baggy knees, smooths out entire surface. Easy to use—takes only a few seconds. No steam nor heat. Saves nap of cloth Lengthens life of clothes Durably made of hardwood—lasts years. Finished - > --y ee All metal parts eavily nickeled. Fits any size trousers ntoMexicg serigudand clear Folds to 15 inches to fit small hand bag. seri eta unless Over 500,000 in use Great Big Profits in Advance No waiting—no uncertainty! Average saletakesless ’ " than 7 minutes! Then you have your big, generous, GETS EM Tolls gunsemnesd. “= rue a . “ | quick, cash profit in your hand—we deliver and COAST ire) Geeterion, tu ‘etc. at big savings. | collect—you just write orders given you! Stay "rest i testi is absolutely guaranteed—patented in all EJ COAST . To ANY countries—exclusive territories now being allotted : MIDWEST RADIO CORPORATION MAN OR | —®® time to lose f 407. € Miraco ide. cancinnatl,O. , woman | NEW—No Competition territory wanted We'll Stay-Prest never had competition—and in its new show you how to commence and improved form it cannot have. Everyone who at once to earn real money takes orders for Stay-Prest makes big money —$123 a week or more— from the very fir nt day Many earn $125 to $165 London, and how to get the ——_ the first week, $54 9 more the first month—$15 to phive Prest Super-Selling Equip- $25 the first P moe ie cupeeianen Gasman ust 4 ag ment absolutely without follow our tried. tossed and proven selling plan cost But you must act e furnish « you_risk nothing. Send quickly——this offer will not now for FREE sell hing outfit offer Chal ACTION GUARANTEED DON'T SEND A SINGLE PENNY | THE GETGEY-JUNG COMPANY G-121, G-3 Building, Cincinnati, Ohio Charges any type of see storage A or B battery, using a few cents worth THE GETGEY-JUNG COMPANY of ordinary house current, G-121, G-3 Building, Cincinnati, Ohie Rush full information about Stay-Prest Trouser Presser and either alternating or di- rect. Cannot injure bat- FREE Super-Selling Outfit Offer Also consider my applica- tion for exclusive sale in my territory tery. Complete directions enclosed, Anyone can op- era te. No expensive “extras’’ to buy. Why pay $10.00 to $15.00 — a charger when you get this splendidGU AR- ANTEED R. B. Charg- er by mailing us two dol- lars (bills, money order, check or stamps) plus ten cents in stamps or coin to pay mailing costs. Charger will be sent postpaid. If you are not satisfied, return within five days and ie — D your money. Order at once— . B. SPECIALTY CO. Dept. L-1 318 East Third St., Cincinnati, 0. Name Address City

Page 296

150 FULL YEAR TO/PAY else- where. Be only $1 to your order and your choice comes to you parcel post prepaid on 10 Free Trial. Then pay tman = more =e asta and after free trial riod pay bal- ance in 12 vowsal monthly payments. Satisfaction ab- solutely guaranteed or your money refunded—our pol- icy for 32 years, Thousandsof special values in genuine diamonds, jew- elry and watches. Copy sent at once on re- \quest.Nointerest, be WB6—Remarkable ge Nationally famous «KE guaranteed greene 0 dial accurate tim ROYAL ene acre CO. ADDRESS DEPT Pis20 BET BROADWAY NY RADI AT HALF USUAL COST Now—we give 30 Days’ Free Trial on*newest 5-tube—ONE DIAL— Coast to Coast Radio. Buy direct from factory—save half and get 2 year guarantee. Full line table type, consoles or complete outfits at prices that will surprise you. Over 15,000 satisfied owners. Don't buy A Radio until you write us for FREE Catalog, low prices and 30 Day Trial offer. Westingale Electric Co.,

1757 Belmont Ave. CHICAGO POPULAR MECHANICS ADVERTISING SECTION oe @t:475 MONEY-BACK ANTEE No more worry with “‘B’’ Batteries! Hook we ert Battery Eliminator and forget

Simple d yone can plug it in to any kind set up to six tubes.

work Write of paper, pin a

name and address on aotiar bill te it, ant mail 1 “TODAY. Pay —~¥ 7 ($3.75 plus a few cents delivers your Eliminator. Use it ten it ‘et mere an satieed, return it and PERFECT ELIMINATOR CO onal Theatre Bidg,, Cincinnati, Ohio | SET BUILDERS! Before you build get our special prices onthe parts you are planning to use. We'll save you meaner Largest and most complete stock in U. 8S. CHICAGO SALVAGE STOCK eTonz Dept. P.M. $09 S&S. State St., Chicago, Ill. LES EES (BURGESS , RADIO BATTERIES) DEY KO Dy eS JRADIO DEALERS’ | CATALOG—FREE! A most complete catalog of everything in Radio. All the latest hook-ups. Sets, Parts and Kits of every description. Live Déalers need this book. Write on your business stationery. COLUMBIA RADIO CORP., 711 W. Lake St., Dept, 288, CHICAGO, ILI REE RADIO MAP Size 28 x 33 inches with rule for measuring distances. List of Re PS with call fetere and wave om, = send us names and addresses of ve friends ~ Ae ve radios and what kind. A. VIKING, 124 W. Austin Ave., Chicago __

t:

6) —t

As

Fansteel Products Company, Inc. | North Chicago, Illinois

———- For BetterFilamentControlon yourradioset us the NEW Lynch EQUALIZOR in place of rheostats. $i< plete with mounting. At your dealer’s or post-paid. Mor back if dissatisfied. In ordering, state number and types of tubs in your receiver. ARTHUR H. LYNCH, Inc., Manufacturers of the Lynch Metallized Resistor, 250 West 57th Street, NEW YORK, N. Y

Page 297

POPULAR MECHANICS ADVERTISING SECTION 151 THE NEW RED JACKET CRAFTSMAN’S LATHE . e : : LE i SF me Quick action Makes Homework EasyNow on the odd jobs/ It’s fun to make furniture, garden trellis, toys, improvements and repairs with a set of tools wwe like this carefully designed by a master work- The deftness that has long been associated with the ae man. use of Crescent Wrenches quatios« ly now to the | complete line of pliers, chisels, bed saws and other tools. All are made under the supervision of and © an accurate wood turning lathe (ca- guaranteed by the originators of the Crescent Wrench. pacity 9 in. x 34in.);a bench saw, that has Hardware and accessory dealers have them, im depth and side gauges; scroll and jig saw; and CRESCENT TOOL COMPANY PE fionary power ‘drilling. butting. grind 210 Harrison St. Jamestown, N. Y. Nv 4ing and cleaning. Attaches to any light | socket and converts your work bench into a CRESCENT fo—eeee = complete private tool and machine shop. A Special CRAFTS COURSE ~ and Smith & Hemenway And Blueprint Service is free to Red Jacket Shop owners—all that there is to know about handicraft methods, raw materials, ™ woods, carving, sawing, turning, de- “i signing, carpentering, decorating, is only j ; taught by special correspondence. Buy On Your Own Terms 10% oS Only $10.00 down. Liberal dis- = counts for cash. Easy monthly pay- ment ppae It is no hardship to own dor Jow n OF GENUINE BAKELITE Orne © Red Jacket Cut, drilled and engraved to order. Send rough sketch Interesting Literature Free . te Just send the coupon. You will be surprised for estimate. Our complete Catalog on Panels, Tubes Hy with all it contains. Beautiful, Instructive, Fas- and Rods—all genuine Bakelite—mailed on request. ' em cinating. Interesting. Everything explained our literature. STARRETT MFG. CO. °72,5:507.5* (SSeeeeeeteecee MAIL COUPON TODAY SSSeeecaeeseeee WACO TOOL WORKS, 2915 So. Wabash Ave. Chicago, tll. Manager, Dept. 106. Please send me particulars about 10-day Simplified Radio Blueprints free trial, free blue-prints and $10 down payment. Blueprints for the most popular sets described in Pop- Name ular Mechanics Magazine can be obtained for a charge just sufficient to cover the cost of production and mail- Address ing. The sets for whict. blueprints are available are: Simple One-Tube Receiver... .... omy 1926 — 25¢ Tweo-Tube, Loud Speaker Set..... 1925 — 25¢ Three-Tube, Cockaday Receiver April 1925 — 25¢ Verge. vase, Cowel.ess, Shest- ave 1925 — 25¢ 1926 — 25¢ Three-Tube, 15 to 550 Meter Set. 1926 — 25¢ Fount Loop Set, for Car or tiem A 1926 — 25¢ Fiv.-Tube, Browning- Drake Set.. Six-Tube, Self-Contained Receiver. . Six-Tube, Counterphase : - eet Six-Tube, Portable, +d Set. one Electrolytic B-Eliminat 1927 — 25¢ Stone Vues, Moder Superheter- odyne; this set o ueprints aera & drilling templates and 2. 2998 75 Be independent and extra photos. — 75c ry B-Battery Eliminator shell 1926 — 25¢ make big profits with the Non-Radiating Unit. - 1926 — 25c¢ Simple Tube Tester and Chart... July 1926 —25¢ B EISSER K E y M A ¢ H ] N E New Perfect-Tone Six .Mar. 1927 — 25¢ Address the RADIO DEPT. - in Youcanstarta business of your own, noexperience necessary Popular Mechanics Magazine Only machine that will cut ALL KINDS of keys perfectly 200 E. Ontario St., CHICAGO No hand filing pogunren. Also first keys by number without Beck numbers of the magazines describing the construction need of taking locks apart. Write Today for Full Particulars. of the sets can be obtained from our Circulation Department, } . , . . price 25 cents each. BEISSER KEY MACHINE CO 407 Fort Street, East Detroit, Michigan The complete equipment consists of the werful Red Jacket Motor, with direct drive in

Page 298

POPULAR MECHANICS ADVERTISING SECTION RUISE ME | Ge Se Fe lines ——_—_—— HE Ekto not only brings you the splendid new sport of oaieeal motor boating— racing, cruising, exploring—but it multiplies the pleasures of your favorite recreation. Do you tour—fish—swim—camp? An Elto puts fresh joy in every sport—instantly makes a fast, reliable launch out of any rowboat on any lake or stream. im The All-Use Motor! leets Every Need! The Super Elto combines boun- tiful power, flashing speed, compact portability and light weight. Starts instantly on the quarter turn flip of the flywheel. Provides motor and boat control from any part of the boat. Famous propello- Pp. Send for new catalog—full of facts you now er buy, a motor. Write today. ELTO OUTBOARD MOTOR CO., Ole Evinrude, President, Mason St., Dept. AA Milwaukee, Wis. dhe UP =e ua: iz St oe | % ~ Sevres AT HOME . Many models of genuine MOVIE MACHINES, some as low as $3.75, all using standard size big theatre films Our stock of films is the most complete and lowest ir price—with an exchange service. Films of leading stars y WMO TREE IAER inc eatatoce . gg. & * 4 cE INTERESTING CA’ AGU! between Cleveland and Detroit, Buf- : NOW! ie faloand Niagara Fallsand Detroit,and PARAMOUNT MFG. CO. between Detroit or Chicago and Mackinac | Dept. 1371 BOSTON, MASS. Island. Also daylight trips between Cleve- The man who studies gets ahead. Popular Mechanics land and Detroit during July and August. Press will advise you what books to read to advance in Round Trip Fares bet - | your trade. 200 East Ontario Street, Chicago, Illinoi«. *CHICAGO and DETROIT... $6 O lington {, t « t t \ v ) N \ v Y ¥ ) Y t ’ ) « v ‘ ‘ ‘ & ‘ \ « t . & ’ ‘ ‘ ‘ ‘ ‘ U ‘ ‘ . ‘ 4 ‘ t ‘ ‘ ‘ ‘ ‘ ‘ N ) ) \ Q e, *MACKINAC ISLAND and ¢ CHICAGO or DETROIT... 93O *BUFFALO and CHICAGO $79 One Way — Trip {CLEVELANDand DETROIT $3.50 {BUFFALO and DETROIT... $6.00 $11.00 *Berth andmeals included. tBerth and meals extra On the Detroit and Chicago Division there is music, dancing, with hostess in charge, bridge, afternoon tea, golf, horseshoe pitching, radio, moving pictures, and other entertainments. Passengers limited tosleep- ingaccommodations. Radio and moving pic- tures also on Buffalo Division. Yachting, golf, horseback pifing. fishing, etc., at Mackinac Islan \ Li mamma S> |S Weds | ral stopover privileges. For Reservations or further infor- brings you the NEW Burlington Watch. Then emall month!y mation, address E. & McCracken, payments. The famous Burlington— always a masterpiece — is Gen. Pass. Agt. at Detroit, Mich, now better than ever! Sent on approval. bottom, direct- to-you prices. Sa NE ae Write Quick! 725. NEw ortogton Book, Show ‘ lp in colors all the latest stvles and over 100 exquisite designs. DETROIT axv CLEVELAND NAVIGATION CO. Tells how to avoid over priced watches. A postcard will do BURLINGTON WATCH CO. bept A tsge cmencs

Page 299

POPULAR MECHANICS ADVERTISING SECTION N ny LLL ALL LLL LLL LLL LIL ~~ Why Don’t You Play a Hohner Harmonica? Anyone may quickly learn to play real music on a Hohner Harmonica with the aid of this Free Instruc- tion Book. See how easy it is! Read the sim- ple directions, look at the charts and pictures, take your Harmonica, hold it as shown and dlow-draw, blow-draw. In a short time you will master the scale; and when you can play the scale you will soon be play- ing favorite melodies to the delight of yourself and friends Get your harmonica today and be sure it's a Hohner. And ask for the Free In- struction Book. tf your dealer is out of copies, write M. Hohner, Inc., Dept. 181 114 East 16th St., New York. The Hohner **Marine Band” is the World's Greatest Harmonica Value at 60c Io oO ee ‘ ‘ ‘ ) x ‘ y N N N Y y ‘ ¢ x: (¢, NEW TIMER FOR FORDS menos FORDYNAMO 60,000 MILES :$ WITHOUT TROUBLE WRITE TODAY FOR FREE OFFER Agents WantedEverywhere Eclipse Timer Co.. 2925 Meinecke Av., Milwauk AMAZING INVENTION Appeals to every motorist. Gets any car out of mud or sand. Nothing like it. ETS-U-OUT TIRE LUG Special offer to agents. Ask fordetails and territory, Chicago Tire Lug Co., 860-336 W.47th St., Chicago Auto Owners rey Ipteatace and Use RO tasured TIRES. wae Remote wellix the only Tires in the World Insured for > Some 3 a all road hazards rec areioes of mileage ifono TIRES sell fast because they have no competition in price: no rival in quality; ne ne in a spearance and no equal in the Insured Protection to user neurance Policy wip every tire. Are made by the only Gre Ban tory in America selling its own product throug authorized Sal en-Acents. We offer opportunity of lifetime to establish sasieebie tire busi- ness of your owr No cogitel required. Sales kit and adver- tising helps furnished xclu- ave territory granted today for Write eatalog and com- information about the lete fiydro Agency Plan. 1 —+. -pahememaemmell Dept. 59, HYDRO- UNITED ‘TIRE CORP. Pottstown, Pa. Millersburg, O. Chicago, Il. | GS MOOTH-ON No. 1 _ hardens like iron and expands in doing so to make cracked, open or loose parts everlastingly tight. With Smooth-On No. 1, you yourself can do a perfect job for a few cents, usually in a few min- utes, and you can collect a handsome profit on every Smooth-On repair you make. Get the Smooth-On habit and you will quickly find that it puts many dollars into your pocket. Try it on the following and see for yourself: In construction work Tightening loose screws, hooks, locks, door knobs, anchoring posts, bolts, hooks, ete., in brick or con- crete, mending loose tool handles, stopping leaks in steam, water, gas, oil or stove pipes, mending cracks, breaks or leaks in furnaces and boilers, radiators, supply and flush tanks, sinks, pits, sealing open spaces where pipes go through walls, etc. In the home Mending leaky pots and pails, making loose handles tight on cutlery, brushes, umbrellas, draw- ers, setting loose casters, etc On the Automobile Making bursted water jackets and pumps good as new, stopping leaks in radiator, hose connections, gas tank and gas, oil and exhaust lines, making a fume-proof joint between exhaust pipe and tonneau heater, tightening loose headlight posts, keeping grease cups, hub caps and nuts from loosening and falling off, ete. To get perfect re- sults, write to us and use the Smooth-On Repair Book. Free if you return the coupon. How to make HomeE.~AUTOMOBILE i. Get Smooth-On No. 1 in 7-oz., 1-1b or 5-1b. cane at any hardware store, or if you want us tosend sample 7-0z can, enclose 35 cents in stamps when returning coupon, SMOOTH-ON MFG. CO. Dept. 37, 574 Communipaw Ave. JERSEY CITY, N. J. SMOOTH-ON MFG. CO., Dept. 37, 574 Communipaw Ave., Jersey City, N. J. Please send the free Smooth-On Repair Book. Name.... Address.......

Page 300

POPULAR MECHANICS ADVERTISING SECTION 148~WeeklycUp. Riding Arounds Demonstrating Moisture Humidifier

Increases * Banas Model*‘A-1"" VIX Vapor | Humidifier and Gas Saver. 5 Models to fit every auto, |} truck, tractor, bus, taxi, y engine, etc., including NEW Ford with Holly Vaporizer Not a toy. Retails $4.00 to $25.00, installed and guaranteed. Cepha 5 ww 75 MILES cot “= says: ‘‘Iwentona225miletripinmy Fordand made my best record of 75 miles to a gallon with the VIX. That'ssome, isn'tit? I can get you the fellow that was with me to prove it.”’ G . . 66 MILES Seorze 8. Cousins ‘*Last Sunday with the VIX on, we drove up to Nuttall, 33 miles, and back, a total of 66 miles, on a trifle over 1 gallon of gasoline.”’ 48 MILES Chas. J. Jabousek, Texas: (SWORN AFFIDAVIT) “The VIX on my Ford is great. Got 48 miles per gallon on 138- mile trip with 14 miles in black mud and chainson. Previously averaged 18 to20miles.”

Mileage % to /2 Gives added snap and pep. Faster pick-up. Highertopspeed. More power on hills. Eliminates hard carbon deposit in engines. The wonderful Vix Vapor Humidifier and Gas Saver is a Moisture device which makes autos run all the time with the same wonderful efficiency they do on a cool, moist night Users report 43 to 75 miles per gallon—official tests show 30 to 43.2 miles. Vapor moisture does it! Automatically and permanent- ly eliminates hard carbon deposit in engine; does away with frequent plug cleaning and valve grinding and gives added power, pep and pick-up Five models for all autos, trucks, tractors. busses, taxis, engines, etc Installation comparatively simple with pictured in- structions—no adjustment or attention after attached. 1 VIX FREE OFFER The inventor is offering 1 free to intro- duce. Every Salesman, Agent and Car Owner should write for one at once. Direct Factory Agencies wanted every- where. Address WALTER CRITCHLOW, inventor and Manufacturer X2-805 St., Wheaton, Illinois, U.S.A. Made by one man selling the VIX. Another made $1656.40 IN 58 DAYS BIG, QUICK PROFITS for Salesmen, Agente Dealers, who act quick for spare or full time cause this amazing new patent is a DEMONSTRATOR. Monthly earnings reports by “spare time’’ Agencies: Frand Hanfelder $107.00 H. P. Phelps William Fraser 189.00 H.C. Daniel Louis A. Carlin E. Schafer M. M. Werline W. M, Hardy P. R. Langel 7 W. R. Moser R. Stefancky... James Paton Can you do as well? Do you want to build a tt ness of YOUR OWN? Do you want t money FASTER, take life EASIER, get the BETTER THINGS of life—and get QUICKER? Write quick for the VLX pr: for your territory. fart sta more of AHEA positic

You-~and This New Machine CanEarn $500.aMonth You'll find ‘em where Operate a Tire Rept Sho ' | ° rtunity for men with small capital. We the best is ' furnish everything—$100 and up. Easy pay- ments. We train you FREE right at home Start demanded! making money at once, Write today for Free Book The selection of **Steps to Success. Haywood Tire Equipment Co. S-M parts for the Popular Mechanics : = 9 1334 South Oakley Chicago, Illinois SPORTING GOODS BARGAINS FIELD GLASSES &NStis oot batteryless receiver, as well as for over half the season’s OFFICE MODEL 5 Power; lenses 1%*°; central +t focusing. Genuine leather case and shoulder straps Weal cnice PIS Marbie’s Woodcraft Knife $1.90 popular circuits, are the best reasons why they will improve any set you have or intend to build. A number of booklets can be had for the asking— Full size, man’s Professional Fielder's Glove. Fine grade Horsehide; leather lined, reg- ular $3.00 Hunting Knives, Riftes, Air Rifles and Baseball, Boxing and Tennis Go« ever at bargain prices. Satisfactic x rite for Catalog “w"’ How to Build the Silver Shielded Six. How to Build the 635 Short Wave Set. ‘Secrets of Quality”’ How to Build the 652 Reservoir B. The 222 output transformer illustrated above, connected between any set and loud speaker is guaranteed to improve reproduc- tion. Price $8.00. HUDSON SPTG. GDS. CO. (Dept. W) 52 Warren St., New Yo SILVER-MARSHALL, Inc. Let us recommend the best books to study 840 W. Jackson Bivd., Chicago, U. S. A.

on any subject. Popular Mechanics Press. Chicago, Illinois

<Y BUILD YOUR own eh GRANDFATHER'S CLOCK We furnish blue prints and instructions. Buy the works ané © from us at surprisingly low prices. Make fine profit t $00 tistic clocks for your friends Plain Works as low as $ es | Others with Chimes at all prices. Ask for attractive free © | AMERICAN CHIME CLOCK COMPANY PHILADELPHIA

Page 301

POPULAR MECHANICS ADVERTISING SECTION Get this book FREE 0 80% Saving! : HE largest, most complete book of its kind ever printed! Packed full of nationally advertised Auto Parts at lower-than-bedrock prices—less than regular wholesale! An 80 page Book of Bargains—Timken Axles and Bearings, Brown-Lipe Transmissions—Pistons—Rings —Hayes and Firestone wheels— Rims, Tires, Tubes and a complete line of Accessories—new, except where speci- fied. Everything for the auto at the low prices made possible by quantity buying and big-volume selling. Largest Stock in the World of new and used replacement parts! Write us FIRST—we have many parts impossible to get elsewhere—and you save 30 to 80%.

Write for Your Catalog Today— FREE!

FREE SAMPLE CASE OFFER | = E: — p — $100 to $125 Profits Weekly . asy ay ments | - , . | . With my ral ay Terms the Witte New line of quality toilet goods sells Engine pays for itself! I sell direct—save like wildfire. No experience required : YOU 25% to 50%! Lam an engine specialist All you do is take orders from this | be ~ been building engines for over 45 years beautiful sample case. Perfumes, soaps, {] Mail coupon below now for my big FREE creams, face powders wonderful 4 ; pecs telling WHY the great Witte Engine products at prices that epee al to all is the best you can buy—for any job women. FREE CATAL‘ RE. ANYWHEI NATIONAL SOAP & PERFUME COMPANY . <— Increases 512 W. Huron St., Dept. C-7, Chicago Your Profits $500 to $1000 a Year That’s what the Witte Engine will do - A ghootusety! Yes, and I guarantee it to do the work of 3 to 5 hired hands. Used all over the world— because it runs on a | cheapest fuels anywhere, from the frozen wastes of Alaska to burning sands of Arabia— from below sea level to 20,000 { Play TENOR BAN] oO | feet above! Whether you have an engine now or not—investi- ISH WAR | gate the great Witte Engine. Mail coupon now. SE MODEL . i Life Time Guarantee! uments v NO music to learn—NO tiresome M Any my of Lifetime Ggerantes ® the te with ™ lessons Play latest song hits by talk of the engine world. Send for it to- yer for as RS numbers instead of notes (or by Runs OR) day. The Witte engine is THE cheapest to as 50c ¢ notes, if you wish). Just pr operate. Burns any fuel with surplus pow- Or, E-7 es ra Wy i, the ar ~—A e eany | Kerosene er. Starts right off, even when it’s 40 de- sold sep- cand tanae, Sie ener we mammalian your Gasoline grees below zero. Parts INTERCHANGE- success—"no play, no pay.” as Oil ABLE. Spare parts years from now. We | rare d ] f 0 yes j PLAY A TUNE IN 10 MINUTES OR Distillate | Wine cin | eh trotting oversee Thousands play this new easy Ay emi-steel cylinders = 2, » ptons SEND IT BACK woriyir mt trer Roe etch Whee Miaguates Dep on Deen ne ee frrends, 1 larity, new a Even though you may not yak oppc unities 1 making opportunities that Send for Free Boo

be ready to buy today get the facts now about this great GUARANTEED for Life Witte — ine. Ask about my 15s to 20 H. P. Engines, 3-in-1 Saw Rig Pump Outfits. Learn all about my EASY Pay ments Plan. atthie —- & _ Get ALL the feat ail coupon today SURE! t tell half’ ‘ry : ‘ SSeS RTS KH CTH Se Oe Be —AP Witte Engine Works, Dept. A-174 F R Witte Bidg., Kansas City,Mo. Empire Bidg., Pittsburg.Pa. E E B Oo Oo K Without cost or obligation please send me your FREE Witte 1 will be surprised how arene Catalog and details of *‘Small Easy Monthly Payment the cost to own your _ string instrument Name -.. vr Free Book ex- tn : everything and the Address Pian. No obliga- State Be more popular, : . . , re fun. Write today Specify Type Engine Wanted FERRY & CO. 22-277" as

Page 302

POPULAR MECHANICS ADVERTISING SECTION

Trade your hours for dollars At once—No more trifling with an un- certain wage job. There is a big demand for Floor Sur- facing Contractors. Our national advertising is helping to develop it—building still greater busi- ness for American Universal Floor Sur- facing Machine operators. More than $50,000,000 of floor surfacing and resurfacing to be done every year. Get your share of it. No big capital required—No long period of training. Just get your American Universal and start to work. The American Universal Floor Sur- facing Machine iselectrically driven— Easy to handle— Does the work of six hand scrapers. Work is pleasant — Always inside — And shows big profits. American Universal FLOOR SURFACING MACHINE 523 South St. Clair Street, Toledo, O.

Spare Hours Into Real Money AVEN’T you often wished for a spare-time way of mak- ing more money than comes in the regular pay envelope? Of the various ways which present them- selves none is more pleasant or profitable than playing engage- ments in a Band or Orchestra. Send the Coupon For particulars of our easy Pay- ment Plan that tells how y you can “Pay While You Play.” Free Trial—We want you to try out a King in your own home, without obligation and if you do not find the King the very best instrument you ever played— return it. Trade4n Proposition—Turn in the instrument you now own as part payment on a new King. Our Secane catalogs show many new model Kings and tell why they are the best instruments to learn on and play on. Use the coupon to order your copy. THE H. N. WHITE CO. 5211-88 Superior Ave. ,Cleveland,O. 2 Instrument Name Address City_

oom fir: ave pakouioe N 0 FREIGHT PAID than Price includes everything complete —lumber cut-to-fit, FREIGHT PAID to your station. New Low Prices 0%" customers claim average savings of 47! over local prices. This year reduced prices mak possible still greater savings. We Loan You Money to Build __ We ship you any home you select, ready to erect, and ADVANCE YOU CASH to help you build. You pay us in small amounts monthly, — as you pay your rent—and your rent money 8 saved instead of spent. Send 25c in coin to- day for beautiful Color Book of Sterling Home Plans and you can be living in a home of your own & month from now. INTERNATIONAL MILL & TIMBER CO. 764 S. Wenona Ave. BAY CITY, MICH. z Do Your PRINTING

Cards, stationery, circulars, tag, labels, paper. Complete Outtits, $8.85 up, Job Presses $11 up, Rotary $149. Card Ws Re” Cutters, $3. Save money. Print for others, big profits. RE Alleasyrulessent. Write for catalog presses, type, paper, Sion cards, ink ete. THE KELSEY CO., A-37, Meriden, Conn.

Big 31, Ft. Telescope Lend wings to youreyes! Peonle and objects miles away seem close. Wonder telescope brings new pleasures to home, farm, camp, travel, sport. Study the mys- € terious Sun spots; see Moon and Stars as never before. Power See people on the beach, Pa J Lenses on the mountains, etc. j Brass bour measures 12 FREE Yes, absolutely free! closed; powe A handsome leather- achromatic ! ette Carrying Case and Shoulder 4 protect- Strap. Also Solar Eye Piece to _@ ‘ ed by view the sun—a special fea- © dust caps ture, found only yn ex pensive Thousands instru- Pleased Bree h wrote: “Watched subma- Fines three miles off const Ed. Foster “Tell time o miles away.” . ner: See lighthouse miles away Mre. Yar- brough: “Could tell color of seroplanc four miles away.” 8. M. Gearhart: Can see men working seven i niles awa A. ‘ R Walker: “Would not take 310 or it . Beach Views Study Heavens SEND NO MONEY On delivery of Telescope, free Case, Strap ane Eye Piece pay Postman only $1.85, plus p (2 complete outfits $3.50.) Satisfaction gu ra teed or money refunded. Send today, e! your friends! Be first to have one. = FERRY & CO., Dept. 177A, Chisago, | U.S.A. Tea HOBA Box M

Page 303

AID hing o-fit, your »mplete (9. Card profits, , paper, 1, Conn. POPULAR MECHANICS ADVERTISING SECTION

Start an HB Equipt Shop Earn “150 to ‘300 Monthly stablished Garages-Battery Stations and mechanics are .dding substantial profits without expense to them. Start n business yourself with HB One Day Battery Service— Paint Spray—or Starting, Lighting, Ignition Service Equip- ment _ HB guarantees bigger profits and enables you to do ir better work than the other fellows with less expense to your Only $16 Monthly Easily paid by increased profits ONE DAY BATTERY CHARGING Gives you the edge on competitors Saves 30 to 50% on electric bills over } rectifier and turns out work in one- third the time. Recommended by | leading car and battery makers.

a4 FREE AIR SERVICE $12 monthly you can have tant Automatic Air Service to istomers to your doors. Belt- ent, Ball Bearing. Quantity tion makes possible the low

PAINT SPRAY Does the work of five men with brushes. Paints cars, furniture, houses, barns, garages You can earn bigger profits yet charge far less than any com- petitor

HB TEST BENCH The best paying line in Automotive Elec- | work Tests g, lighting and n systems. Brings usiness from other Priced $100 to elow similar qual- hts HOBART Successtul manulacturers BOX M67

BROTHERS ~since 1893 ~ TROY, OHIO Tear off Coupon and Mail Today

HOBART BROTHERS Co. Box M67, Troy, Ohio. jour d me complete information on the items I've checked with ur 30 day trial offer, easy payment terms, and information on WwW HB equipment will increase my earnings [)One Day Battery Service Profits () Electrical Test Bench Opportunities ) Portable Paint Spray Business ] Better Automatic Air Compressor

8 Cold Tubes for 8 Different Flavors The Right Flavor always on Top— and COLD Each tube holds 9 cold bot- tles—72 in all. 72 more in reserve rack so you can't run short. To serve any flavor asked for, take a warm bot- tle out of rack, push it in one end of tube, holding same flavor, and out comes a cold bottle on the other side. “TL iquid’ Cooler Doubled My Profits in Bottled Drinks” says A. CRUICKSHANK, Dallas, Tex. Many make up to $675 a Month Serving Bottled Drinks this New Way ATOBODY ever dreamed that so much +‘ money could be made selling bottled drinks until the “‘Liquid’’ Bottle Cooler appeared two years ago. < < ~ Nobody ever imagined that bottled drinks 4 en could be served so fast, clean and cold. Pn \y Ww a Nobody ever conceived that the public’ ("7 “{ ’ - would be so quick to pass up the old 4 Ca 7 fashioned ice box or tub of ice water to buy f from the new, sanitary, ‘Liquid’ Bottle Dysaws Crowds Cooler that they see advertised in Saturday of Good Evening Post color pages. _ : Spenders to— But actual records tell their own amazing ¢jigar stores story. Read about them in the book Grocers “Liquid Profits’’-—sent free if you'll mail Roadside Stands Coupon. Learn how more than 20,000 Theatres merchants in almost every line of business yA ay nome are ringing up unheard of profits with this gai¢ grounds new invention. Many who never sold amusement Parks bottled drinks before because of the muss Railroad Stations and bother of old fashioned methods are Origa Sullding now clearing $10 to $30 a day from a little ° waste floor space 3 feet square! “Doubled Business and Profits”” Wanine Rooms A. Cruickshank of Dallas, Tex., writes, Clubs “My ‘Liquid’ Cooler has doubled my business Os Stores, ete. and profits in drinks and quickly paid for itself."" McGrain Motor Co. says, ‘Profits paid for ‘Liquid’ Cooler and left a nice margin.”’ “‘Best investment I ever made. Doubled sales of soft drinks,”’ reports F. J. Houser of N. Y. And a Schenectady dealer tells how two “‘Liquid” Coolers cleared $90.00 profits in a single day! Profits Pay for *‘Liquid’’ Cooler Many guess the price of ‘“‘Liquid’’ Cooler at $200 to $500. Yet it costs only $100 on easy terms. One dealer paid entire purchase price out of first 5 days’ profits. Others pay for it quickly out of savings in ice and clerk hire. Send for Free Book Get all the facts in new book, ‘‘Liquid Profits."’ Tells how others have increased sales of bottled drinks 100% to 400% made up to $675 a month in season—cut ice bills 334% to 66%% —saved 60% or more floor space and up to 80Q clerk hire. “‘ Liquid Profits” sent free if you give name of loca bottler. Mail coupon now. FREE ‘‘Liquid Profits’’ Liquid Carbonic Corp., Dept. P-6 | 3100 So. Kedzie Ave., Chicago, Ill. | Send Free Book “Liquid Profite"’ and Easy = Terms on The “Liquid” Bottle Cooler. u ; HQUID PRODITS

Page 304

POPULAR MECHANICS ADVERTISING SECTION | Hi | Nii (HH i } ee TH Ht|t | ounts for thetast ble resistor, Mans ufacturers and fans. )» watts and Its a ower assures quiet, UD! 1 ‘eliminator. —_— d. —— is stamped \ ' 1 4 VIAE ang capacity | ent carry atistance FADES. enti your radio & life VoCPAROSTAT ‘the n t Insist on NROST AT. NICAL LABS. pnuine E Street ry 6 ER North 6th Y AM 285 Brooklyn, nw. Y- peing i and ei the name Wh SA isied. “eo eve GENUINE 20 INCH Fata cone Weer, D ; — By yal OPE-N-SEAL é t reuit designed by one of the foremost ; radio engineers in the country. Clear and realistic re- ‘ e ru it J ar To re} | Kit af je Ce we agg Solid yy oye a F —" ane -autifully engraved. Sub-base marked for a H 1 connections. 2 dial control; Kurz-Kasch bakelite indi- Opens and Seals Jars in a Jiffy cator knobs. New type UX sockets. Low ratio trans- AVES FRUIT from formers for improved tone quality. All hook-up wire and colored ili Jay Riitery cable included. ‘Tubes are 201-A type, tested and sentched. i fro enseneal parte house jue $60,our price $16.95, } WIS m injury! Vee when can- Complete Set of Simple : Plans and Directions to Build ry sealed SECURELY. Usein ning and every jar will be | opening each j} ‘limin- k= ») Very easy to build this set with the plans and instruction we - pening ence jpe once iS furnish. No complicated drawings .Can be builtin 2 hours.In- L ate danger of cutting hands structions for operation included. Make money by building or breaking jar. SimpleasA- these sets inyour spare time and selling them to your friends, B-C. Jar Lifter prevents | burning hands in hot water. Lik Six piece set. Fits pint, quart and half gallon standard jars. Needed year ‘round. Just wrtte your same end eddvens on 0 pest card and eck es to send you this Sold direct by Tyler representatives or by mail, $1.00. great kit together with the Eria Cone loud speaker and 5 tubes. We will ship AGENTS Make $8 to$20a day selling this them right away. When they arrive, pay only $16.95, plus asmall delivery charge. re 3 . : » Ww toslaw RADIO EQUIPMENT CO., Dept. P, 549 S. Wells St., Chicago, lil. outit. Spareor fulltime. Writetoday. THE TYLER MFG.CO. Dept. M-8 Muncie, Indiana /) PROTECT YOURSELF From Burglars and sneak-thieves. Kee-lock is SMOOTH WORKING AND — : guaranteed to make any mortise lock PICKPROOF ~ Needed on every door equipped with mortise locks, | FINE LOOKING E stores, tool houses, sheds, clothes closets, furnished | Frost-Radio Metal Frame and Bakelite Rheo- me rooms, ete. Jimmy proof. As simple to apply stats are,the smoothest working rheostats made. ff inserting key. Send 25 centsin coin today. Agen wri Perfect contact with absolutely no wear on ZF Hesore - do ian ot aight windings. You'll like them. Bakelite pointer Z Oo for special money making proposition. Sells at sigh knob; genuine Nichrome wire cannot burn out; £. P. M.. 415 W. 50th St. supplied in resistances from 2% to 75 ohms. KEELOCK MFG. co. o- NEW YORK, N.Y Metal Frame, list, 50c. Bakelite, list, 75c : F Secure them from your dealer. nag nly A tong TE. gs When You Want a Chicago Philadelphia St. Paul Coupon Sonen - Washington, S. ¢. oy caauee For Our BLOTORCH Buenos Aires, Argentina Literature That gives 400° more heat— BEER Ee Presa ccna Rowen Seat Ce sele-ser te posts as avertised in opu. ics. me erature about your rhe 2 as & iy pular s TURNER MASTER No. Only $7.75, postpaid TURNER BRASS WORKS, Industry Ave., Sycamore, Ill. ’ ———————EEE —— — . be a City Long-Eakins Co., 628 High St., Springfield, Ohio “ Mail me at ques your fees cstalog ond toll om — ings at —— + particulars about how to make big w a peed wa op @ profits in the Crispette business. Eight motor-driven tools, complete + bench P , jig portable electric handsaw, stationary power drill, butler Name grinder, scratch brush. Works from any lamp socket 0.0 down, 10 days’ free trial; free working blueprints furnishec Add Write for full information . ee ELECTRO MAGNETIC TOOL CO. Month Easily Possible! Dept. 2.52, 1830 S, S2nd Avenue CICERO, ILL, (Adioining Chica) _ Agents’ G 5 Sells for $1.25. Writes like a$7 Pen Sample C Make $10 Daily Easily LADIES’ OR MEN'S STYLE = —— MAKES $8.40 Comes in Red or Green — ~ IN TEN MINUTES 1 ns in put minutes , en YEARS i order anohitg inznssen TRACY KRENZ, Nevrast Write for FREE Wholesale Speciatty Catales. Improved Point ee F. SPORS CO. 427 MAIN ST. LESUEUR CENTER, MINN)

Page 305

POPULAR MECHANICS ADVERTISING SECTION OOKED! You bet he’s hooked! Game little scrapper. He's given you a battle. Your heart pounds—your blood tingles—as you play him toward the net. Man! there’s a real thrill. Bass waters soon will open. Get more and better fishing this year withaJohnson portable boat motor. Attaches to any rowboat. Anyone can operate. Four new 1927 Johnson Motors offer speeds of 8, 13, *2 and 27 m. h. p. Ask any Johnson dealer to let you try a Light Single or Light Twin. Ideal for fishermen and auto-tourists. Sold on pay- ments by sport goods, hardware and ma- rine supply dealers. Write for our 1927 catalog describing the new Johnsons. JOHNSON MOTOR COMPANY 2436 Sample St., South Bend, Indiana -eterborough, Ont., Canada Outboard Boat Motors. —s o-where the Fish are Striking Export Division: 75 wos Street New York, U.S.A Conadion Dist iuter: Pete deesenath Canoe Co. World's Largest Manufaciurer of Outboard yp Motors —— Catch Fish! esi Eels, Mink, Muskrats with rnew folding galvanized WALTON SUPPLY CO., 3500 JUNIATA AVE., Svea. WIRE TRAP. Write for our FREE TRAP OFFER and Bargain ST. LOUIS, MO. } Catalog. $1 Box of our famous Fish Bait FREE to introduce our traps. | REMINGTON PORTABLE TYPEWRITER Dealers and Branches Everywhere 6“ 53 GOLD independent” Font Lever, Self-Filler Stylopen “Makes Writing a Pleasure” Jumbo, $3.50; Red, $3.00; Black 4. C. ULLRICH & CO., 161 Washington St..N.Y. Est. 1855 Agents Wanted 30 Days’ Free e Trial MEAD Bic Select from44 Stytes,colors and ayote You caneasily save $10 tory on your bicycle.Prices$21.S0and up. re to Rider i= = al f marc * r® Weshiponaoorer: to k money. best st quality, at N= room Resa, wheeis Ti PES a: ind cau oe prices. Send No Money, ata factory DEPT. #-110CHICAGO [294 marvelous Men! Women! Here's your chance to get your own shoes without cost, and to make the easiest money of your life Take orders for genuine Tailor-Made Shoes from your friends and neighbors Shoes Tailor-made to fit six actual foot measures. Choice of 70 different leathers—made in 70 styles in men's, women's and children's shoes Unlimited market Amazing value because sold direct from makers. Every pair guaranteed to fit perfectly and give comfort and satie- faction. GET FREE OUTFIT No capital —se investment necessary. Big commissions for you in advance. I do the colle and de ivering wens fer — outfit ~~ "ad and get anos Tail or “Made Sample shoes to with ' AILOR-MADE ones vem, ; Dewt. 298" 932 Wrightwood Ave "Chicage, m. at once Mar am—e MODEL SHIP BUILDERS Give your boat a true n odel appearance Rig her up with true scale parts and have eee! efforts appreciated. Enclose stamp for »00klet, containing parts, plans, etc. Model Ship Supplies, Box 613, Dept. M, Mineola, #. Y accuracy and economy on You can perform every woodworking operation with greater speed. Boice-Crane Bench Machines Do ripping, mitering, grooving, rabbeting, sanding, grinding and band saw operations better, quicker and easier. 14 h. p. motor attached to light socket. tor. Send 10c¢ today for 64-page booklet on Bench Saws, Jointers, Lathes, Band Saws, etc., also contains list of books which have over 250 working plans of furnit P W. B. & J. E. BOICE, DEPT. P. M. 6-C, TOLEDO, OHIO ure. Send NOW Driven by \4 to Sold with or without mo- Drills,

Page 306

POPULAR MECHANICS ADVERTISING SECTION “sat NEW, Simple, Automatic Send for this Book % PROTECTION | eluted sheenielaliahthe aa ie ot Se at a price that brings for You! VOLUME SALES a ‘ This book is ) Mopieccie gen See “The Nestler Plan,” a ey-making advantages startling revelation of the profit- Representatives fe ye possibilities in a new tire-servicing . > Aa mag ear Ae. "eent business of your own. Any ambitious 2 sales instead a just one day’s work not un- man with a modest capital can quickly of 1 at these : usual. Most sales mode with- build up a successful full-time or spare- low prices - out demonstration. ugo is : : . 1 q! size the cole iorbnienmeniien Ait time business with Nestler methods and > . . TOMATIC home and life pro- equipment; no tire or garage experience 3 *"e tg Rom same chemical all required. Nestler operators make ‘ire Departments use. America’s , biggest Fire Chiefs recommend it. money because they furnish It’s your opportunity to make good in an exclusive service . a ip J a BIG WA that every car- 65%—90 % Cash Profit O owner needs. YN ef No investment. No red tape. Full com- ”, . mission same day you take order. Biggest “ey Write field. Every home, factory, church, store, @, y, Today speates. truck, ——— ee. a —— h o, For FUGO outperforms, therefore outsells 7 (a) ; competition ney to make $100 a week j us nr . for snereste P many doing better. No experience needed he ing book The Distributors ! simply ambition and ability to follow instruc- x, Write at once tions. Waiting profits all around you.—Act for State Quick! Write AT ONCE for full details. rights. THE NATIONAL FORMETAL CO. 6535 Metta Ave., N. E. Cleveland, Ohio

RUBBER FUSING CO., Inc. 245 W. 55th Sr., N.Y.

y matched pants. 100,000 patterns. , HOLLAND PRINTS Every pair hand tailored to your measure; no a4 Wonderful new way of binding kodak “‘readymades.’’ Our match sent FREE for your wm! pictures. Keep a photographic rec iy O. K. before pants are made. Fit guaranteed. , a! ord. Sample Holland print from © —s eo eee Na mg po ; ™i| your negative for luc. * u PANT ANY : cee as * 315 So. Dearborn Street, Devt.62 Chicago FRANK SCOBIE, 43-8, SLEEPY EVE, Minn. | FOY’S BIG BOOK, in Colors DAYS FREE TRIAL A complete guide to successful pester and

Squab Raising. Low prices on CHICKS, < Breeding Stock and PIGFONS. Write Today! FREE! FRANK FOY, Box 18, Clinton, lowa Leal 12,00 AY 0 0 FORD OWNERS | NEW Timey. . t

8 eee Our Factoryto * 5 Years to Pay Home selling plan actual- a : Aut ly saves you from $150.00 $275:“ claim that th to $200.00. We pay the fem 8 from 8 t freight and deliver to your home any- Timers sales pose bilities whe where in the United States any piano or uarantes for the life of the ear. You d , 4 f a salesman. This amazing Time’ vells player piano that you may select from our fi aight. You make 200 por cent profit on eve catalog. Makes Old Fords Run Like New P n - “ ‘* Once a Ford is equipped with the “Dyna Every instrument is guaranteed for 25 yrs. er s nate : e t timer can be aotte ly thing that w Fill out the coupon below. It will bring & ° coer hg fh you full details of our liberal selling plan. ew of th et “ Dynan alter be once uses this new Timer. Rs it ; Est. 1859 Capital and Surplus $2,000,000 Get Territory Quick ae Our agents can easily 5 $ Schmuotlier & Mueller Piano Company $6,000, yes, even $10.01 jparetime workers mab Dept. 379 Omaha, Nebr. = a. and even $30.00 a day our agents we h . oh Cab " e a | Please send me your plan and catalog. alias das ak o granced @ pian that John Cable made $ equip their own car or carry it for demonstration N purposes. The unique principles of thie wonder- ful Timer will make themselves apparent to any Ford owner after a minute's examination. Send

than 10 days Many tremendous profits. Y get into the big money same as John Cable and ® name and address for Free Sample Offer and pare DYNAMO TIMER Ce. ticulars of our big moncy making proposition. 426-1125 Eleventh St., Milwaukee, ¥'s.

Page 307

POPULAR MECHANICS ADVERTISING SECTION r i eS lal ~... "s< Tae Fo . ee «7 ee ee R, ee Ne eee beers Fe “MS @wmRe 1 Oe oo ® be No. 22-— 9i in. swing, IMPROVED MODEL SOUTH BEND JUNIOR Back Geared Screw Cutting Precision BENCH LATHE | Ang Complete with Countershaft and Equipment

and up" A Precision Lathe lee’ Small Work An improved model precision screw cutting lathe used by repairmen, mechanics and small parts manufacturers. Will cut screw threads 4 to 40 per inch, bore, drill, ream, turn, chuck, turn tapers, etc. Hollow spindle for Draw-in Collet Chuck work. Can Be Fitted With Many Attachments Milling and Keyway Cutting Attachment, Taper Attachment, Electric Grinder, Draw-in Collet Chuck, Electric Mica Under- cutter, Turrets, Lathe and Drill Chucks, Tools, Etc.

Motor Drive from Ordinary Lamp Socket lilustrated on the right is the Improved Model Self Contained Chain Drive Unit Motor Driven No. 22 Jr. Lathe complete with 4-H. P. Reversing motor and Reversing Switch. Driven from an ordinary,lamp socket. BOOKLET No. 22— Illustrates, describes and prices the Improved Model No. 22 Jr. Lathe. Write for it today. South Bend Lathe Works fm istanms sts rs Tel. Canal 9085 622 East Madison Street |

No. 22 Improved Model 9in. x 3 ft. Lathe complete with Self Contained Unit Mc eee Dei ve with ye H. P. Single Phase Reversing ~— r, $9 Reversing Switch and Equipmer 261

South Bend, Indiana Improved Model SOUTH BEND LATHE

Features Specifications Of the No. 22 Jr. Lathe Back Geared Head Stock Six Spindle Speeds Phosphor Bronze Bearings Power Feed to Carriage Set-over Tail Stock for Taper Turning Graduated Compound Rest Micrometer Graduated Collar on Cross Feedand Compound Rest Screws Built in 2%,3, 3%, 4 and 4% ft. bed lengths. Floor Legs if desired.

Time Payments if Desired. The entire line of 96 types and sizes of South Bend Lathes has been completely redesigned in the last two years. The new lathes are heavier, stronger, and have greater belt power. In 20 years, we have shipped 36,000 Lathes to 64 countries of the world. The most popular sizes listed below: Quick Standard Size of Lathe Change Change 9in.x 3 ft. $258 $228 llin.x 4 ft. 308 268 13in.x 5 ft. 387 337 16in.x 8 ft. 553 493 18in. x 10 ft. 746 681 Of the No. 22 » Lathe Swing over Bed....... 000ecO Oe ST nm, ° | Distance between Centers 18 in. Size of Centers No. 2 Morse Taper Hole Thru Spindle ; % in. Size of Spindle Nose, 1 in.. diameter 8 Threads Precision Lead Screw % in. diameter 8 Threads per in Thread Cutting Range. .4 to 40 per in. Weight, Lathe and C’shaft....375 Ibs.

Time Payments if Desired.

Page 308

POPULAR MECHANICS ADVERTISING SECTION Hayy 8’ COMBINATION ¢ 13 Toots Iw ONE AW Saw table raised, showing Emery wheel, saw guard and drill attach- ment. Planer at- tachment on saw table. Showing Sanding disc : , S attached ¢ OU save a great deal of money, time and space by buying a Devitt 8° Combination Saw. Why buy special tools for beveling, grooving, buffing, ete.? The Devitt Combination Saw will rip, cross cut, bevel, miter, groove, mortise, tenon, drill, rabbet, grind, buff and polish. The attachments are easily and quickly adjusted. The F. 0. B. Phila. ’ , saw and motor when set up ready for work occupy very little room. The 4% H. P. 60 Table tilted cycle 110 volt A. C. motor can be run from a light socket and provide power for other for beveling purposes when the saw is not in use. A cut upto 214” can be made with the 8” Combi- ‘ nation Saw without planing. The ideal machine for — factory or home, complete with attachments: 12°x16* table, 8° Combination Saw, iron pulley for saw table, 10° ripping fenc« adjustable cut off miter gauge, motor-specifications as above, 144° endless leather belt, wood pulley, 8 ft. cord and plug, 6° buffing wheel, %° 3 jaw drill chuck, 5° emery wheel, 6° sander saw guard, and 2° dado insert. $35.00 F.O. B. Phila. Height 7%", shipping weight, 100 I» D d h d (Planer attachment to fit on table top will smooth pieces up to 2 in. wide, $12.00 extra ado nea F. O. B. Phila.) attach ed for Write for our beauttfully tlustrated 4 page circular. wale: PAUL J. DEVITT siisortanicts Men Women Wanted Stunning RAINCOATS AG ial Pri Bese Mat te a, See 5 ni - ga ENTS Special P rice Siehaseiedes of susie sequived. | : Money Back Laney al gor Demo, Foes, enay GUARANTEE ONLY Day: Write for big FREE Book. )@) AMAZING VALUE,),) peaons tee) | S75 Agents, wesw ‘SepsaDay This Wonderful opportunity is offered to the first rson in each locality to introduce our exceptional . ~and a ine of stylish, fine tailored, good quality Super-Built Write quick for new proposition. We Raincoats-A Real Value.Get Your Coat FREE offer $8.00 a day and a new Chevrolet WRITE FOR FREE OFFER | Stace for Gomer All:Weather ‘Tope SUPER-BUILT GARMENT CO. coats and Raincoats. Spare time. No Box 453, Dept 12, Chicago, IIL | COMER MFG. CO., Dept. W-5i23, Dayton, Ohio Stops Foot Pains In Five Minutes An amazing new home method for per- are stopped almost instantly, weak or manently ending foot troubles with their fallen arches raised and strengthened, the aches and pains has recently been invented circulation invigorated, weak feet m by Dr. F. H. Griffith, a successful foot and _ strong, sturdy and self supporting and foot trou! leg specialist. His method differs from Permanently ended. | If your feet are weak or f s * ‘ | ao arch s : “they ache and pain, burn and itch, are tired, tend others-in that there are no arch supports, puffed and swollen, write Dr. F. H. Griffith, 31 bandages, bands, cushions or other make- Davidson Bldg., Kansas City, Mo., for his free b shift devices to be worn in the shoe or on “Foot Health,” which fully explains his met the foot— tires steno lis As it points the way to foot health and comfort, an = _ Se — nen nO crs- is sent without cost or obligation, every foot sufi comfort or troubles. Yet foot and leg pains — should have it. rd

Page 309

POPULAR MECHANICS ADVERTISING SECTION THE MELODY SHI 2:50 Size: Size: Height 25” Height 25” Width 9” Width 11” Length 27” Length 27” Mayflower, 1620 Santa Maria, 1492 The Pilgrim’s Vessel The Flagship of Columbus Build a Ship Model Loudspeaker Perfect Tone Plenty of Volume No Distortion Do you want a loudspeaker that is different? If you own a Ship Model and wish to install the Do you want a beautiful Ship Model? MELODY | SAIL and | am, Radi us an one 4 £ Oo your main-sall. e wi then senc you Do you want perfect tone? a MELODY SAIL and Unit to fit your Model, via . >. — 7 a Of course you do! All of these are to be found in Parcel Post, C.0.D., $9.00 plus postage. the MELODY SHIP, and it will not cost you as much The unassembled parts for cither the Santa Maria cr Mayflower for both combined in one as the ordinary Ship Model Model, without the Melody Sail attachment, can be had for or the ordinary loudspeaker alone would cost. The —t agg Full detailed diagram and instruction SHIP MODEL when complete is the most beautiful wo Be = eel he > peer ng every operation for completing of its «ind on the market today. The loudspeaker 1 fee oak an he “y “apo” _— - m om ane " = ’ “ yo é ne unassembled parts for either the Santa Maria combination is unsurpassed for beauty of tone and un or Mayflower Ship Model. tesether with the MELODY SAIL distorted volume that brings out all the low musical attachment for making a MELODY SHIP complete, send us notes, faithfully reproducing the zoom of the bass viol, your order—NO MONEY—and pay postman $12.50 plus drums and tuba, as well as the soprano tones of postage. violin and flute. There is nothing like it on the CAN . . . s . ‘ : : ant ANAD A? PIG 2DERS ” EB 7 market anywhere today. It is absolutely new. This peg gf ay ae MUST BE AC is not an experiment but a real proven device, sold on ea money-back guarantee to assure satisfaction. _—_—_—_—_—_—_—_—_—_ | THE WORLD’S LARGEST BUILDERS OF SHIP MODELS will supply you with all the parts to build a MELODY SHIP. You may choose either the Santa Maria or Mayflower Model. The parts for the Ship Models are made of wood. This is not a cheap card- | | GUARANTEE: If, after assembling the MELODY SHIP, you do not think it worth many times the pur- chase price, return it to us in good condition and we will gladly refund your money. What can be fairer than this? board imitation, but a real Ship Model. Putting it to- gether is as simple as A B C. The instructions read like this: “Put No. 49 on top of No. 48, and tap lightly with a small hammer,” etc. A school boy can put one together in a few hours. WRITE FOR CATALOG The Loudspeaker U nit is of the Electro-Magnet type. MINIATURE SHIP MODELS Power amplification is not needed to force the low 3818-20-22-24 Baring Street tones through. They come through with perfect ease Philadelphia, Pennsylvania. and do not interfere with the higher notes, giving you Please send me the complete parts, cut to fit and ready to put faithful reproduction at all frequencies. The Unit is «ether, as 7 - which I agree to pay postman the placed on the main mast, which is firmly seated two ‘Milcated price plus postage: inches deep in the three-and-one-half-pound hull, mak- MELODY SHII fodel, $12.50 ing it impossible for counter-vibration to affect the SHIP MODEL 3 , 4.98 k or perfect reproduction of the MELODY SAIL. The MELODY SAIL el, 9.00 the driving pin is attached to our specially prepared, super- (Be sure to indicate whether you want Santa Maria or May- LEI vibrating MELODY SAIL. It does not change the flower model) yade appearance of the Ship Model. Instructions for in- ‘LEASE PRIN : ; . 2ESS P “— n . stalling come with eack MELODY SHIP PLEASE PRINT NAME AND ADDRESS PLAINLY TO oubles oS ase ~ . AVOID DELAY ic, | MINIATURE SHIP MODELS *™ 247 Street or 315 pee 3818-20-22-24 Baring St. Paes: ethod Philadelphia, Pennsylvania State rt. ind uit

Page 310

POPULAR MECHANICS ADVERTISING SECTION The New A feature of this micrometer is its adjustment for wear. It is so con- structed that adjustments. do not change the convenient reading position of the graduations on the hub. The No. 11 has an exceptionally wide range of usefulness. It gets at places other micrometers cannot BROWN —a Brown & Sharpe Micrometer with several exclusive features BS No. 1 1 ° $6.25 With Ratchet Stop $6.75 reach—its new frame design gives it a greater measuring capacity. The frame is of I-section forlightness with strength and rigidity. It has the popular black japanned finish. Ask your dealer about Micrometer Caliper No. 11, or send for circular. For other Brown & Sharpe Tools, send for Catalog No. 30. TOOLS Dept. P M BROWN & SHARPE MFG, CO. Providence, R. 1L., U.S.A. &} SHARPE “* World’s Standard of Accuracy”’ | . Wobbly Chairs? LINX Fixes ’Em for GOOD— yg Not awire makeshift but a sturdy brace of cop- | pered chain that pulls the chair together with a 1000 Ib. pull! Used by big Hotels. Try for l1OdaysFREE. Eighty cents if you like LINX. H. S. Reid Corporation | 16 Exchange Place New York City CAL. 30-40 “ a KRAG CAamsine str know. 5 shot, 22 inch Barrel. A few used, but service- $] able, for $9.75. Shipping weight, 131bs. Shipping extra Krag Rifles...........----- S12 KRAG Sporting Rifse. Springfield 45 Shot Guns ..._ 4.75 SPRGFLD. 45 Carbines Krag Bayonets 40 cents each. Postage Extra _— Shipping Weight 2% Ibs. Terms Strictly Cash. NoC.0O. D. Shipments. Catalogue Free on Reques . $14.00 4.50 t . STOKES KIRK, 1627-P. M., North 10th St., Phila., Pa. aAoos MULTIPLIES SUBTRACTS . owinocs : — + Great money maker. Everybody inter- ay. X ¢) a BEY ested. Reserve territory immediately. : HOUK ADDING PENCIL CO., pt. 38 St. Louis, Mo. x) nai ZmMOoOyD IPD EAA D AOS TSS § =$820 00

Page 311

POPULAR MECHANICS ADVERTISING SECTION 165 | | THIS COUPON VALUABLE =e NOW IS THE TIME TO GET YOUR TYPEWRITER! Be up-to-date—know the pleasure and convenience of having one in your home. You'll be amazed at the uses everyone in your household will find for this real Underwood typewriter. Every member of the family will use and enjoy it! Don’t send a cent— but do get our big special offer—our valuable book on typewriters and typewriting—FREE. Any One Can Learn to Operate a Typewriter! You can learn to write on this standard-keyboard machine in one day; it’s so simple that even a child can use it. A week after the expressman has brought it, you'd feel LOST without it. A trial will PROVE it—and doesn’t cost you a penny! SPECIAL FREE TRIAL OFFER We don’t want a penny now. Nor any money at all unless this proves the typewriter bargain of your life. The trial is FREE. If you buy, our easy terms make it a pleasure to pay. There's no excuse now, for not owning a typewriter—and the finest make! We include all tools, a cover, etc., all complete, all ready to write. Write us now. Deal direct; we are the largest factory of the kind. Our plan gives you the opportunity of a thorough trial before you buy. Yourunnorisk whatever. You start to pay for your typewriter AFTER you have found it the only machine for you! But get the facts before this lot of machines is all in use. Clip the information coupon before you turn the page. It will pay you! Note the very useful book you will receive free! Write for full particulars at once The Greatest Typewriter Offer Ever Made If you know typewriters, you know the perfect work and the ease and speed of a Shipman Ward rebuilt Underwood typewriter. New machines are guaranteed for only one year; WE GUARANTEE EVERY ONE OF OUR MACHINES FOR FIVE YEARS! If you have never owned a typewriter, start with the finest! You can try this one at our risk. But, the time to act is NOW. Don't miss out on this present bargain offer whereby you can get this genuine Underwood at a big savings. the convenience of a typewriter. FREE! Get our catalog free; manual free, too; valuable instruction for learning rapid typing, useful pointers for all who use a typewriter, business forms, social correspondence, work for others, etc. Clip coupon NOW! Don't do longer without erm THOUSANDS HAVE FOUND A WAY TO OWN TYPEWRITERS mie ic Oe EERR ES SPR SN oc Mail Today! Shipman Ward Manufacturing Co., A-212 Shipman Building, Chicago, III. Please send me your Free Trial Plan and Typewriter Book, together with your special offer on prices, terms, free course in Touch Typewriting and also how I can make money with this typewriter without obligation. This is not an order. ; lowest prices and terms. A

Page 312

166 POPULAR MECHANICS ADVERTISING SECTION LIGHTING MATCHES -WILL\MAKE -YOU- S $300+92500 4 4} wb YA \ yb 9c ¢ ate / ; / a Va Y f ) Amazing Sure- nl Fire Strongest eetitas | In Automotive History Demonstration backs sale of Blancke Con- ; : trols. Guaranteed to give ells by thousands new automatic attac > at sw sells by thousands new automatic attachment that sworn public over 30 miles per gallon 01 tests prove makes Fords run Fords — to practically elimi A‘ « « 4ana” 43.8 Miles on 1 Gallon of Gas nate carbon formation and Agents everywhere report astounding results. R. K. Waite ordered its troublesome consequenc: 1000 Blancke devices in one month. (Profit $3000.00). Wires, ‘Get —to save half oil—to reliev ready another 2000." Clyde B. Jones sold 63 devices in one day. battery strain—make mot (Profit $189.00). You don’t need experience. run smoother me give better acceler: on-——allow lower speeds What Is This Sensational Demonstration? ff ii:) ces: Stars motor mm Sets . ii ‘ ee Me tot; tna! diately in any weather without us The instant heat touches the Blancke Thermostatic Carburetor of choke and saves half repair bi Control, the needle valve on the carburetor slowly turns before the Ford owners everywhere are de fascinated eves of spectators. As it cools the needle valve turns lighted with it and their boosting back again. It is easy to understand why immensely superior results can be promotes sales. obtained with this accurately adjusted automatic instrument—to see why Blancke Thermostatic Carburetor Control in official public and private tests showed 43.8 per gallon of gas. 250,000 tests averaged 32 miles per gallon. Guaranteed to give over 30 miles per gallon on Fords, Starts Coldest Motor Instantly even on wintriest days without use of choke. Guaranteed results combined with amazing demonstration make Blancke Control greatest agent’s selling success of recent years. Get One Free to Introduce e Also Blancke Plan that starts you without capital in a real business that ] an ee oe you $300.00 to $2500.00 and up each month. Exclusive Territory. Sales guaranteed. Start to make big money—beginning NOW! Send coupon today for sample Blancke Control and great Distributor’s Plan. BLANCKE AUTO DEVICES CO. 157 E. Erie St. Dept. 805-H Chicago, Ill. Mail This Important Coupon Today! "Vos has. cts lgiiaaieaiatatimaaaindt, lancke Auto Devices Co ] Dept. 805-H, 157 E. Erie St., i Chicayo, Ill. Gentlemen: I should like to get a Blancke Control Free to introduce C | in my commurit) Also send details of amazing new Guarantee I adilla, Plan by which I can make from $300.00 to $2,°90.00 a month profit. { standan, Cc ‘arburs, “ Ace. a7) Se, i Address | City

Page 313

POPULAR MECHANICS ADVERTISING SECTION 66 ty-It's a Whole Machine Shop This Amazing 17-Ounce Tool Conquers 60-Lb. Kit! The most revolutionary hand tool ever invented. Does the work of other tools costing over $50—truly a tool of 1000 uses. Just the “‘hand-grip” of a tiny rubber band holds a hard bearing ball—the hardest-tc-hold thing known—against a 300 Pound Pull! Grips with ! Ton Direct—128 Tons Per Sq. In. Pressures through its 10-to-1 Leverage Power-Gear Transmission. In addition, the Grip LOCKS! Among Thousands of Large Users are the MAKERS of Buick, Chevrolet, Nash, Packard, Reo, Studebaker, etc Automobiles, Fisher Bodies, ete.; who with their employes have bought Kits in quantities of 500 to 1000! Studebaker has approved it for use in its Serv- Guaranteed The Plie-Rench KIT is positively guaranteed. It has stood the most trying tests of time and service. Of thousands—the First Commander of the U World Flight said should form part of equipment of each every Airplane and mobile." One Engineer said—"‘I have used my Plie-Rench for 5 years and wouldn't be without it for $100—and I mean it!"’ Special Introductory The Universal PlieRench For every kind of Pliers, Nut Wrench, Vise, Clamp, and Spring-making Work Handles aut —Everywhere. andl a bottle caps. Fite keyring tainer. “ The Worid’s Greatest Small € PRICE $ 65 Tool "—yours FREE with the KI1 ONLY Regular Price $5.00 Thousands fortunate enough to be able to see the astonishing performance of this marvelous Plie- Rench KIT are glad to pay the regular price of $5.00 You can TRY this amazing performance on your own work in your own way for 2 weeks. and if the Plie- Rench KIT has not EARNED FOR YOU in that time the value of its price—just return it, and your money will be refunded as fast as the mails can carry it Also, with your PlieRench KIT you receive a valu- Yi able Manual of Mechanics that every man should 4 have. Ittellsin64 pages and 145 illustrations some of the marvels of ‘‘The PlieRench Way”’ —the quicker, better, and easier way to do 4 every Kind of mechanical work. Make use of the Coupon be- 4 ~ low, get thisincomparably / m better tool KIT for the Z a w PlieRench representatives earn amazing incomes jemonstrat- this wonderful new tool man alone sold nearly 10,000 in just one state. Fastest seller known Factories buy hundreds Every suto home owner buye We have wonderful special propo- sition to agente. Mail coupon for full details. Why not earn $75 to $200 and more a week, spare or full time? price of just one ordi- nary tool—let the 4S marvelous Plie- Pa c Rench with its “ versetile 3 Jaws ~~ SPEAK FOR cause it does so many usef.l and amazing Grip! Every Auto and Home Owner—every It was standard equipment for the U. 5. its astounding 1-Ton Grip makes it worth ten true Ratchet WRENCH—Parellel Pliers— most worn and A G E N T Ss places—and FIFEL-FLASH Ibs. — you get a Service that bests For every kind of Pipe weighing 60 Ibs. other tools can budge, et You get in a ae Blue Leatherette HOL- —each giving undreamed of performance. In- Grip on work of any possible kind, or shape, HAVE YOU EVER HEARD OF A TOOL | TheWirePlieRench at the very jaw-tips. Will remove broken studs, Spring Work; and _ the coil a spring of hair-fine piano wire! MAIL TODA ice Stations throughout the World. things so easily, so instantly And even a man who ever uses any tools needs it every day. WORLD FLIGHT and the U. 8. 8. Shenan- times its cost. Speed VISE, and more. Instantly and auto- chewed nuts in TURNS $200 a Week | takai PlieRench KIT — complete UNI- any number of Wrench and Pliers Work; and costing 00 STER, the 8%° Universal PlieRench with 2 stantly (in 1/5 second) you insert the Jaw or size from 0-in. to 1 };-in.! And—nothing THAT WORKS LIKE THIS —it actually out- For every kind of Wire taps, drilis, etc., with next-to-nothing to hold Googe, wok other Tuce THEFLASHSALES CoRPN pe 4 Thousands of housewives are using it too, be- woman's hand applies a HALF-TON Giant's = World Flight Equipment doah. Creates a sensation everywhere. Just The amazing EIFEL-FLASH PlieRench is a matically it LOCKS its death-grip Jaws on the the tightest AND-—in the weighing only 1% VERSAL Toot | The Pipe PlieRench other hand tools Chewed Nuts that no . = Whole Kit in 1 Tool Ss EXTRA Jaws—a PIPE Jaw—and a WIRE Jaw you need, and as quickly snap a One-Ton Ever can get away from that grip! grips a 40-Ib. Vise, and applies a 1-TON grip Tire Chain, Cable and t do. on. Yet its smooth grip will hold a hair and tesa te* FP-4809 N. Ashland Ave., CHICAGO, ILLINOIS /

Page 314

- POPULAR MECHANICS ADVERTISING SECTION No more batteries No battery charger to watch No batteries to water No failure of the power plant just as you sit down to a fine program No upsetting the house to have the radio serviced No apologies to make to call- ers that the batteries have just run down

No batteries to recharge No batteries to renew

€ pe “dial i! < e, without | te ibes and power unit, $95. AB and C Power from the light socket for the latest model Crosley A C Radios This power unit weighs 13 lbs., stands 9 inches high and is 4 inches wide and requires no more attention than a vacuum cleaner or an electric iron. It transforms mechanically ordinary 110-volt 60-cycle house current into smooth, quiet radio energy. No interfering hum! P Price $50 Crosley radios especially designed to use this battery eliminator are the 6-tube AC-7, a neat table model of the famous Crosley single drun control receiver selling at $70, and the 6-tube console model AC-7-C pictured above at $95. Prices slightly higher west of the Rocky Mountains Crosley Musicones $9.75 and $14.75 Write Dept. 15 for descriptive literature THE CROSLEY RADIO CORPORATION Powel Crosley, Jr., President CINCINNATI, OHIO Crosley seta are licensed under Armstrong U. 8. Patent, N 1,113,149, or under patent applications of Radio Frequency Lab oratories, Inc., and other patents issued and pending MECHANICS PRESS

Page 315

[ Works Like | The Static is filtered out and held back by the lead outer jacket. Only the wanted broadcast goes thru to the copper core which connects to your set. 7 Filters Out So Much STATIC and Noise You Never Know they Exist Imagine listening to beautiful music, thinking it is from a local station, then hearing the announcer clearly speak the call letters of a station a thousand miles away. Imagine the pleasure of get- Rad PROOF of the Amazing Performance {this Great, New Radio Improvement antenna you shipped me now work- ind results are good Had WJZ, * KDKA, WTAX, WSM_ and rs during thunderstorm."’ Signed DONALDSON, M. D., Louisiana » a six-tube set and after in- . Subantenna I received greater * than ever before On Jan- isth, I received a program on my broadcasted from Buenos Alres, America, at 10:15 in the evening. er could receive such distance on jutside antenna."’ Signed, W. C. YMUTH, River Forest, Ill m able to report that static which ‘ source of much annoyance be- has been entirely eliminated so “ I am able to observe For and for its contribution to Uvity I think the Subantenna is est device I have ever had any ex- ence with.” Signed, REED L ‘RKER, Chicago. QW um glad to report to you the won- “ul reception that I am _ receiving ut interference or static of any It is, indeed, a wonderful thine “lio and my opinion is that it will itionize the industry."’ Signed, RL DESSAUER, Kansas. ting real DX crystal clear on bad nights when STATIC is raging all around you. Imagine being able to bring in distant stations with tremendous volume on the same set which with an ordinary aerial gets only “air noises’’ and static crashes! Because the filtering action of SUBANTENNA delivers such a clean, clear signal to your set, you can turn the power full on when lister ing to DX. This means you can get bigger volume and more distance with your present set if you use a SUBANTENNA Trial Offer! Make this Convincing Test Install SUBANTENNA. Leave your old aerial up. Select a bad night when DX is almost impossible with the ordinary aerial. Make a comparison station for station, connecting first your aerial, then SUBANTENNA From stations that are just a mess of jumbled noise with the old aerial, you'll get reception that parallels local in sweetness and clarity. Send coupon at once for scientific explanation of SUBANTENNA and for particulars of GUARANTEE and FREE TRIALOFFER. Send COUPON NOW Co., 2714-M Canal St., Chicago i , Cloverieat Mfg. ; ‘ REE TRIAL Tell me all about SUBANTENNA and your I ' overleaf Mfg. Co. | °'"" t Name 714-M Canal St., Chicago, Ill. , ae

Page 316

} Of} fine lofaccos Du j } : fovether riebt ther ' ? thino Can be “at fha

Page 317

I tasi: ‘ pu ‘he; es if bhai