Popular Mechanics 1924-12: Vol 42 Iss 6

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NOV 7 994 POPULAR MECHANICS MAGAZINE WRITTEN SO YOU CAN UNDERSTAND IT

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=. wie Get out of th game ‘Thousands of jobs are open, salaries —and the sky is the limit McSweeny Trained Men Are In Demand A man who has completed the course taught in either of my schools finds the doors of the automobile, tractor and battery businesses open to him. ** MeSweeny Trained” means a real job at real money. Thousands of my former students who now own their own business won't hire any but McSweeny trained men. They know! You Learn by Doing Actual Jobs You can’t learn any profession out of books, vou can learn why, but never hou I teach vou \ both the why and the how by doing actual jobs on the most modern equipment. That's why you ~ can walk out of my schools into big paying jobs, rut of underpaid, no advancement jobs get —the ficld of unlimited opportunities — paying from $150 to $500 a into the auto of independence. month on into business for yourself. $86,000 Made by a McSweeny Trained Man Last Year! A. J. Beall, Jr., Morgantown, W. Va., mack $86,000 last year with his garage and service station. Geo. W. Smith, W. Alexandria, O., makes over $800 a month. Thousands of others are making from $50 to $150 a week Aren't You Just as Good as They Are? Would you admit to anyone, even to yourself, that these men are any brighter or cleveret than you? I know them—and I'll bet aren’'t—the only difference is that they kr hou Spend eight weeks in either of my two big schools and I'll teach you the same things that have made them big money makers, of big pay you go \ a Decide Today — Your Entire Future cori, ~ Lies in the Balance Meosweeny Auto, \ Tractor & Electrical Schools, \, McSweeny Bidg., ~ Address either Cleveland or Cincinnati Dear Mac: Send me your big catalog and full information about your Special limited offer will leave fill in the coupon today! Name.... pobesesocsseerewe *\ Address ..... pevteowens-deeee \ CINCINNATI, OHIO |», \. Address Either School No facilities for Cov 1 students + The right decision today wili either start you on the you in the ranks of the Auto, Tract *s WicSweeny and Electrical McSweeny Building CLEVELAND, OHIO [fit is: road to success Make your decis Schools | R. R. Fare andBoard | FREE underpaid. For a limite a special low rate, Includir fF ar Board particulars t ing coupor

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POPULAR MECHANICS ADVERTISING SECTION inestock s. Length, Operating Costs Tuovsanns of people are already cutting their “B” Battery costs one- half, or even two-thirds, by using the new Eveready “B” Battery No. 770 on their heavy drain sets. This new Eveready Heavy Duty Battery marks a marvelous advance in reducing “B” Battery costs. If your “B” Batteries have lasted only two months on a five or six tube receiver, this Eveready Heavy Duty “B” Battery will increase the service two to three times. Use this Eveready Heavy Duty “B” Battery on any receiving set on which the “B” Batteries last less than four months. When thus used to its full capacity, it is the cheapest as well as the best source of “B” energy ever offered. Manufactured and guaranteed by NATIONAL CARBON CO., Inc. Headquarters for Radio Battery Information New York San Francisco Canadian National Carbon Co., Limited Toronto, Ontario Radio Batteries ~they last longer

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SOE} Wey as NN . \\ » _ yi = ~*4 i) = ST AA y WZ ay 7 hap Yay BAS SOLAS Courtesy The Illustrated Lond Multicolored Paper Streamers Link Liner to Shore at Sydney, Australia; One of the Ceremonies That Ma the Romance of a Ship Putting Out to Sea—See Page 929

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aC — _~ Popular Mechanics Magazine REGISTERED IN U. &. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT DECEMBER, 1924 No. 6 Pye EZ f Amplifiers Suspended above Vast Audiences Clearly Transmit the Voices of Distant Speakers Whose Every Word Is Distinctly Received by Hearers Often Hundreds of Miles Away Political Spellbinding by Radio ( ) iundred and ten million Ameri- of public speaking. Picturesque and vivid will have the opportunity next personalities are lost on the radio audi if listening to the inauguration of ence. The speaker’s individuality counts ruler of any nation to be chosen for nothing, and what he says for every- radio campaign. While thousands thing when the listener is sitting a hun he three dred or a thousand tial candi ‘ miles away. Words in person, . ; have displaced ges- more at ’ tures as vote ge e or other { ters. In the ‘past, the cam- WK oA! matter how heard their ~ . 4 poor the speaker, : ae over the . ie usually found and that ‘ that the voters who opportunity ¥ ’ were interested be extended 1 : . enough to turn out inaugural to hear him would is delivered . ? stay to the finish, fashioned ee whether they liked ler climbed ¥ ' his arguments or the stump not. This vear the impaign of voter had but to d settled move a dial a frac in front of tion of an inch and iphone, and lS pick up a jazz band tally some te. - or a dramatic rect political . ‘ tation instead. Get had to fit mare | ting the radio mes elves to an President Coolidge’s Messages Frequently Reach Re- sage of the rival new torm mote Hamlets through Radio Loud Speakers candidates for pres 879

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880 POPULAR dent before the nation involved a triumph f electrical ingenuity. Only four years igo, in the Harding-Cox campaign, the number of listeners who could hear a pub- ic speech had been raised from a few hundred within sound of the speaker's voice, to many thousands, through use of the public-address system of amplifiers. In four short years, the possible audi ence has leaped from thousands to mil hons through the development of radio broadcasting. Herbert Hoover estimates there are 5,000,000 radio-receiving sets in operation in the United States, with an iverage of three listeners for each. Other experts double those figures In the 1924 campaign, beginning with the political conventions in Cleveland ind New York, radio, telephone and tele rraph facilities were all linked together to carry the peeche country to the oth England ca In the convention halls and about the piattorms addressed he crow is werea y] net to enable 50.000 everal acres ot! ot the speaker. e microphones ( rried the telepl one cre its » broadcasting iS I far distant cities, where it was nN air for the listener-in at In some } ne broadcasting stations, ssides the usual transmission over the tomary wave | O | : the peecheg Battery of Radio Mi o hones Which Broad- cast Important Public Address to Listening Millions MECHANICS were transformed into a_-= short length, at high frequency, and dist to distant stations, where they were up and rebroadcast on a wave which receiving sets could pick wy carrier wave of the short-wave | quency transmitter is inaudible average receiving set, and so did terfere. In one case, a speech dé in New York was broadcast throu stations, each getting the prog the air on one wave length and put back on another. Station WJZ microphones on the speaker's tal carried the program to the stat direct wire. There it was broad listeners around New York city o1 meter wave length, while a lead f: amplifier panel carried it over a to WGY, at Schenectady. N From that wire WGY sent t! out through two different t1 one on the customary 360-meter and the other on the high-frequer meter wave. This wave, inaudibl listener-in, was picked up at K DKA, at East Pittsburgh once on the usual 326-meter teners-in, and again at 98 meter rier wave to KF KX, a repeatet Hastings, Nebr.. and to 2-A‘¢ chester | ng. The lattes linked by wire with six othe ing plants, which in turn rebroa speech to their immediate territ Hastings, Nebr., station KFK transmitted the program on wave, and also at 104 meters, to be up and rebroadcast once more RE. as — ~ ¥e 4

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POPULAR MECHANICS it Oakland, The linking o broadcast- ions by land roved equal- tive, and as ible. For ocratic con- entire story so fectly that occasional per only ant word oO! needed from him to fill in the gaps. Just pre ceding the advent of the central an two was ion at New the republi- Nivention at nd, and for neipal ad- of the can during the campaign no less than stations were joined by telephone broadcast the speeches simul- Microphones at the conven- ere scattered through the hal, on ‘aker’s stand, in the galleries, band, and in the announcer’s Only one microphone was used me, but manipulating a silent the control operator could carry to sible audience the speech or music, ipping of the chairman’s gavel or rs of the crowd. ging from one microphone to an- like an organist manipulating the of a mighty organ, he put the high ind shadows of the convention pic- sound waves that carried the © U. &U. sembly to Reach Hearers be- by nto Magnifiers Installed to Aid Orators at Open-Air As- t] Below, Speaker's Stand in Arlington Cemetery nouncer on the air each local broad casting station in he far-spread chain made its own announcement They were told when by a telegraph wire running from the convention hall. Once, during the republican convention the broadcasting was interrupted for a time when a storm struck Ohio cities, making it necessary to use all avail able wires to dispatch relief expeditions and bring the stricken towns. more for politics than merely bring the candi date’s to millions. Perhaps its greatest been the elimi- Hundreds of Feet Away; several out the story oO! Radio. how ever. has done message contribution has nation of empty phrases A speaker with a vivid personality can say nothing, and say it attractively, but the man who tries to deliver the same speech to the radio, where only words count, is doomed to failure

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POPULAR MECHANICS TRACKLESS TRAIN PROVIDES HIGHWAY LUXURY lo add effectiveness to an accident-pre that may be used by the driver or vention campaign, a luxurious trackless into a kitchen with an electric motor train, consisting of a realistic imita- Trimmed with mahogany and blue tion of a steam locomotive and a buffet- the car is provided with comi parlor car, each equipped with a ninety- wicker chairs, folding seats, a he horsepower gasoline engine, has been con- writing desks, and is electrically | structed for a cross-country tour. \t the rear is a roomy brass-lined The coach is slightly more than twenty- vation platform, and a radio set eight feet long, eighty-six inches wide, has range of 6,000 miles and a concealed a wheelbase of 198 inches and is con is an added luxury. Underneath the structed of heavy oak, reinforced with are four compartments for bagg mm ce steel. A four-inch flange around the tanks for water and air. A featu chassis protects it against bumps. The _ the train is the hydraulic-braking i: motor, instrument board, pedals and steer tion. This is controlled entirely f1 ing parts are cleverly concealed ynder a engine, although the coach has a s¢ buffet cabinet in a forward compattment — brake for use when it is operated a Views of Trackless Motor Train, Showing Realistic Locomotive and Parlor Car Luxuriously Equippe Easy-Chairs, Roomy Tables and Observation Platform for Cross-Country Safety Tour

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POPULAR MECHANICS 883 Big ( al Deposits Found in Arctic Slot Machine Serves Cigarets Fi: Hundred Miles from Pole When Stores Are Closed twenty-five feet in thickness Slot machines for vending cigarets and d only 520 miles from the North matches in London are a welcome novelty Capt. Donald B. MacMillan, to visitors. The mechanism is operated rip to the far he deposits, ire not avail- immediate use, Cc 1) miles beyond Sige iny transporta- ti, eprt by dog sled. ence of the coal, proves that the was once by heavy vegeta- hifting of the poles, bringing icceeding glacial produced the Dr MacMillan dence that such yoing on now. icial ice cap is thicker and ad- farther ever y » reports, and has ing so for over vears. Within n experience in the Visiting American Sailors Learning to Operate the Cigaret Slot Machine inland = glaciers e advanced to the sea, producing more in the usual way by inserting a coin and bergs each year. turning a knob. There are spaces for dif ferent grades of tobacco. Typewriter with Piano Keyboard Helps in Transcribing Music Odor of Metals Due to Gases pying music from the composer’s Experiments have been made to prove said to be greatly simplified with that metals have odors composed not of pewriter ar- ment devised n eastern in- It consists : ght Bi chemical changes portable key- “ie oe ae ;' At ordinary tem- an exact ‘ : peratures the odors ite of that on frequently could no, and an not be detected or rically op- were almost imper- ranscribing ceptible, but be- tus some- came more pro- milar to the nounced as the nism of a metal was heated, " writing ma- and then disap To operate peared after the keyboard is heating had _ been | on the piano continued for a a table or considerable length ind as it is of time. The ex |,” the notes perimenters also inscribed on hi ave succeeded in nthe record- Copyright, Keystone View Co isolating the odor- trument. Music Typewriter with Its Portable Piano Keyboard OUS matter. ( the atoms of the metal, but of the products of their

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POPULAR MECHANICS Night Golf with Luminous Balls Mimic Train Robbery Tests Mail Played on Lighted Course Car Equipped to Repel Band LIS Using balls and hole pins coated with By staging a modern night hold: phosphorescent paint, players of night mail train to test the efficiency of ; golt now follow their drives almost as car equipped for defense against government othcials proved the a the occupants to fight off attack: standards which are visible in darkness at dits with little danger to thems« sreat distances, while tees are marked with — the postal matter carried. The scen incandescent bulbs on upright sticks. The mimic battle was laid along an same implements can be used for ‘both — section of the New York Central easily as in the daytime The cups on the greens are indicated by luminous and was selected resemblance to tories where oe ¢ robberies have in the past. W band opened thx on the car the within inserte automatically flares throug! the steel side ing the grout eral hundred feet ind bringing every one of the figures. Wire proot window tempts of the to make an ope the interior, wl shot proof loop abled the defe: pour rifle fire any direction off any assailant might run in to the car and out ot range ot Popular Movie Stars Playing Night Golf with Luminous Balls They Drive holes, a cone-s to Greens Marked by Phoszhorescent Hole Pins steel spreader Taste the bottom avliight and evening games, as the paint bullets fired from within thr ‘s not easily wear off. Besides aiding armored hole in the floor, scatteri1 rs to keep in good form, night games on a level with the attackers’ leg playing time for those otherwise said the imitation holdup resulte early evening hours. “entire destruction of the high Hundreds of rounds of blank , were used in the test, and six me Collapsible Metal Air Chambers up the bandit gang who first boa to Make Ships Nonsinkable locomotive and ~overpow ered” the crew before rushing the arm Working models of a device using col- Motion pictures of the affair wet lapsible metal chambers intended to keep for future study of robber tactic hips from sinking in storms, collisions or by explosions or torpedoes have been postal clerks in charge of the demonstrated in the east. Their inventor is reported, 3,000 mail cars are to | claims that they can be installed on a ves- with similar apparatus to prevet sel without sacrificing any of the space from banditry in the future. used for essential purposes and at a cost not greater than the amount of one \ ear's cessful was the defense on the pa Ce q@ America imports about $20,000, of bananas a year. wT surance on the ship.

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POPULAR MECHANICS ail Its Flares Projected from Inside the Illuminate the Scene of Attack 0a. Postal Clerk Firing Repeating Rifle through Swiveled, Armored Loophole sandits’’ Attempting Rush on Car to Avoid Shots from Swivel-Gun Holes Deflector Which Scatters Shots Fired through Opening in Car Floor ng a Mimic Battle between “Bandits’’ and Crew of Armored Mail Car to Test Ability of Defenders to Prevent Robberies

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S86 Skeleton Is Adopted as Symbol by Fliers of ‘‘Jinx’’ Air Fleet lo show their unbelief in the influence the squadron number thirteen may have on the luck of the unit, aviators of the ~ ose pe ae re Flier of Thirteenth Air Squadron and His Plane Adorned with Skeleton Insigne of ‘Jinx’ organization have adopted the skeleton as their insigne. Each airplane is adorned with a large, bright painting of the “grim reaper,” scvthe in hand, which can be readily seen at considerable distance. One of the craft bearing the symbol was suc- cessfully piloted through a severe storm and landed at the home field without dam- age to operators or ship. Steam at Twelve Hundred Degrees Drives Torpedo’s Power Plant In the small but mighty steam-power plant that sends torpedoes plunging through the seas, engineers see possibili- ties of vastly increasing the efficiency of stationary plants in industry. Tremen- dous obstacles are in the way and the whole matter is largely theoretical. How- ever, during the last decade there has been an average yearly increase of about fifteen degrees steam temperature in land use and the rate for the future is expected to be more rapid. The torpedo power plant weighs only twenty pounds, and its boiler is about eight inches long. It operates with steam heated to 1,200 degrees Fah . not to tire children. POPULAR MECHANICS renheit at 350 pounds’ pressure. W is remembered that iron gets cher: at this heat and can be shaped blacksmith’s hammer, the fact that diminutive power plant can functi such high pressure and develop bet 100 and 200 horsepower with its tiny bine, is considered all the more ren able. A mixture of air, compresse 2,600 pounds to the square inch, and \ is directed into a flame of atomized hol to generate the steam. To pre overheating, water is sprayed into the ture after combustion has occurred. brings the temperature from 1,600 degre: which would otherwise be developed could not be used, to about 1,200 degr he heated gases escape at the top of t! chamber to the turbine wheel whi about eleven inches in diameter turned at 11,000 revolutions per n Unlike stationary plants, this small is required to operate only for abo minutes at a time. Its life is hfty to 200 hours without repairs, and ciency has not been a special objecti is the case in larger turbines Fur more, the cooling effect produced water in which the torpedo is subme would be difficult to realize in a land | only Snow Skates to Add a New Thrill to Winter Sports Skates for use in snow have bee: signed to add another thrill to the li winter sports. Strongly constructed straight-grained hickory treated wit! they are said to hold the weight oi heaviest adult while being light en: The runners a: rustless steel and the top is covered corrugated rubber to provide a no surface. The skates are attached to Snow Skates Attached to Ordinary Shoes with ! Straps Are He!d on Firmly nary shoes with rawhide straps be used more months a year because is nO Waiting for ice.

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POPULAR MECHANICS of Pompeii Rivaled in City ind beneath Sahara Sands tions now being made on the site Magna, an ancient Roman city undreds of years ago under the fripoli, are revealing relics sur- n grandeur and in state of preser- ose found at Pompeii, according sruno Roselli, professor of Italian ar college. Sesides beautiful of the highest type, palaces and is baths, ruins of a fine Roman the first of the sort ever to have scovered, already have been dug he city was the birthplace emperor Lucius Septimius vho ruled Rome in 300 A. it once held from 100,000 1X) inhabitants. Following ine and the coming of the vho did not molest it ex- remove forty huge stone for the construction of a mosque, sands and earth- it hf contributed to its ruin and it was swallowed up. Only the tops of columns were left protruding. and were discovered eighty years until after the world war, has excava heen attempted on any large scale. ng the buildings that have been un ed are the palace of the emperor, ouses that held grain for shipments me and a number of dwellings e construction of the harbor is being | with great interest as, up to this archeologists are said to have been ed as to the methods used by the ns.in building their quays and docks. vork of removing the sand is being by Arab prisoners of war and is ted to be completed in two years ago. SS7 Gold-Plated Stones on Skyscraper Add Beauty to Structure Lifting its somber bulk above the side walks of an eastern city, a big building constructed almost wholly of black brick App'ying the Gold Leaf and View of the Shining Trimmings is given a striking color relief by the brilliant gold surfaces of the masonry trimmings. Real gold leaf was spread upon the stone by an improved process, which emplovs brushing ma later proot! special chines Coatings of varnish were ophed to make the plati - water Clock without a Face Striking the hours » bell of the church over clock without time for a London communi 400 years. Made in the sixteenth century, > timepiece ts of the crudest type but structed throughout. The winding gear are cut from oak, and iron is used for the bearings. Recently metal parts and striking in the clock which WV ooden counted tv tor nearly which it is hung, a tace or hands has by a village blacksmith strongly -con heavy some new placed should years. pins were . exper#¢rts declare, time tor continue to give accurate

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S88 Mirror Signboard at Sharp Curve Prevents Auto Accidents For the protection of motorists at a dangerous curve on an English highway, a large double mirror has been erected. As Car Nears Curve, the Big Signboard Mirror Warns the Driver That Another Is Approaching It is set at such an angle that traffic ap- proaching from either direction is visible at some distance to a driver going toward the curve so that he has ample time to turn out or slacken speed. The arrange ment is said to have reduced the number of accidents at this spot. Heat of Breath Is Able to Release Power to Lift Many Tons . . control ot For automatic sures, temperatures ol steam pres- rooms, electric cur- rents and other factors, ulator that takes the place ota large industrial plant has been invented by a Swedish engineer It is so sensitive that the breath of a child. directed into a funnel or the heat from a man’s hand held several inches away, will cause it to release sufficient energy to lift many tons Its secret is ) a mechanical reg- man ina based on the expansion and contraction of a strip of ebonite by heat or the swelling and shrinking of bands of cotton threads under different changes of POPULAR MECHANICS humidity. These slight movements acty- ate the end of a lever controlling hydraulic pressure that opens or shuts the prope; valves. Elevators’ Speed Set by Machine That Serves as ‘Traffic Cop” Skyscraper elevators can be built operate in safety at mile-a-minute but are not because the passenger’s | economy ts not built to stand such su drops. Instead, about 600 feet a mi or a mile in seven minutes, is the hig practical working The maker however, do not rely upon the inner fe ings of passengers to regulate the An automatic governor cop’ to keep the operator from exceed the speed limit. Elevators, incident start and stop much more quickly t vehicles traveling horizontally, and reach maximum speed within a few fe speed. acts as ‘trathc Pneumatic Tire for Giant Aircra Will Support Ten Tons Constructed to withstand a load of tons when inflated to a_ pressure seventy-five pounds, what is said to b largest pneumatic tire in the world been completed for the United States air service. It is sixty-four by fourt There’s Room for Young Woman, and Some t in Giant Aircraft Tire inches and it is expected that it w used on the alighting gear of large planes.

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POPULAR MECHANICS rers” Sasety Camp Built on Solid Ice at “Top o° the World” Where Glacial Walls and Jagged Peak Form Barriers to Perilous Climb toward Everest’s Cloud-Draped Summit New Climb Planned to Conquer Everest Explorers, Undeterred by bene of Two Companions, Determined to Go Back Again to Scale the Roof of the World ‘-DAUNTED by the tragedy that when, in 1920, the Dalai Lama issued per- claimed the lives of two members of mission for an expedition to attempt the 1924 Mount Everest expedition, the ascent. On his warrant the mountain is vors are already preparing for an- given its Tibetan name, Cha-ma-lung sault on the highest peak of the mo, meaning “the place where it is so high d, to be made in 1926. Swiss alpine that even a bird goes blind when he get: bers also are planning an expedition, there.” Acting on this permission, the vill make the attempt in 1925 in an first Everest expedition went out in 1921, rt to beat their English rivals. ascended to a height of 22,000 feet-and \ith both the earth’s poles visited, the nei back valuable maps and data— rts crossed and lesser mountains _ but left one of its members in a grave in a ed, Everest alone continues to defy 17,000-foot pass, the first victim to the high s efforts. Rearing its head 29,002 feet altitude. In 1922, the second expedition, e sea level, the great peak was thrown following the same trail, pushed farther to mountain climbers after the war, ahead and three men, including George

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890 Leigh Mallory, reached a height of 26,800 feet, while two others, armed with oxygen tanks, climbed to 27,300 feet, less than half a mile beneath the mountain crest. Inthe thin air at such extreme altitudes the burning sun threatened the climbers with sunstroke while their feet were being frostbitten on the glacial ice and snow. Before the work could be completed the dreaded monsoon season set in and ter- rible snowstorms swept across the moun- tain face, followed by warm winds from India which melted the and sent avalanches cascading down the slope. One avalanche swept seven Tibetan porters to their death and the expedition was forced to retreat. The third expedition, in 1924, was equipped with better oxygen appara- tus and supplies, while the backbone of its man power was Mallory and other veter- ans of the preceding climbs. After heart- breaking effort, a camp was pitched at a height of 27,000 feet. Several efforts to scale the peak were frustrated by bad weather, and finally Mallory, the veteran, and a young coititle : ¢€ udent named Ir- vine at- tempted the dash for the summit. Later the same day, when the clouds on the peak lifted, their companions at the 27,- O00 - foot camp saw the two toil- ing up a tle ridge at t he 28,200 foot barely feet below the summit. Thenthe s°% r m clouds closed in— and they were never seen again. Whether they actu- ally reached ‘the summit, and perished Snow s t level, SOU Monument Erected near Base of Mt. Everest in Memor and Faithful Porters Whose Lives Were Lost in POPULAR MECHANICS there of cold and hunger, succumbed to exhaustion on the ridge, or fell into some glacial crevasse may never be known Doctor Somervell, who with Col. No ton, commander of the 1924 expeditio, reached the 28,000-foot level, says effort required to move at that height almost beyond comprehension. In order to take a single step forward a man must first take ten deep breaths to get enoug oxygen into his lungs. Each says, is equal to the exertion required for a 100-yard dash at sea level. Despite the difficulties, veteran climb of the Alpine club are confident Everest will be conquered. volunteers have offered their services { the next attempt, but only the pick of + world’s athletes are eligible. The me bers of the expedition must practice co step he Hundreds oi stantly to keep in trim, and even a brie! rest entails months of hard work to «& back in condition. While lecturing in America raisi: funds for the third expedition the ill-fated Mallory tonishe crowds | climbing fire hangti from tl lower sid by his fat That » only part his daily e ercise . escape suggeste: that tir that it mig be necess to expedit to live the sloy of Evert above 20,000 level for year or t to thorou ly themselv: Sut t natives | ing neat are sure spirit ot mount will never conque! by man send acclit ¢) The Times of Intrepid Scientists hree Expeditions +

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POPULAR MECHANICS & Underwood before the Blast; Unpacking the Dynamite and Geyser That Crashed Skyward When Charge Exploded, Leaving Only « the Hea 1 Heap of Crumbled Ruins Thousand Pounds of Dynamite Blackboard Tilts to Ease Eyestrain Used to Destroy Lake Crib on Pupils in Classroom eckers employed to destroy an aban | water crib, two miles from shore 11 Michigan, saved much time and setting off six thousand pounds frequently caused by improper lighting namite under the brick and stone. Th shots were fired, a final charge tons of water and debris high into r and reducing the ancient structure heap of crumbled ruins. fired by electrical means. a patented By tilting the schoolroom blackboard on shaft holder, elare is elimi nated and students are spared the eyestrain he apparatus can be quickly fitted to any board and is so adjusted that a child can tilt a heavy length of slate to the proper angle with the aid of a wheel on the bot- The shots tom. With this device, it is not necessary to darken the room to stop the glare. Grass Growing by Electricity ectric lights have been used success- at the Jumping Brook golf club, in Jersey, to grow grass on the greensat ind thus shorten the delay in put e course into service. Grass lighted ht grew four inches in three weeks. grass on the unlighted portion oi reen grew but one inch in the same d. Twenty-four thousand - watt es with special reflectors were hung feet from the ground to give a con- us, even spread of light. On the ed portion the seed came through in days, while seed sown on the ted part of the same green did inate until two days later. un = Siete not Blackboard Tilted to Give Proper Light and Aid Vision of Students

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892 Spare Wheel at Rear of Car Solves Problem of Parking in Jam So that automobiles may be easily han- dled in parking jams, a device has been Views of Spare Wheel Used as Rudder to Steer Car in Traffic Jams invented which makes use of a spare wheel carried on the rear of the machine. Spe- cial apparatus attached to a lifting jack, which is connected by wires to the instru- ment board, holds the wheel. When the car cannot be driven forward or backward, a turn of the lever will cause the jack to lower the wheel, raising the back of the car a few inches from the ground. An- other switch makes the spare revolve to the right or left as desired, swinging the rear of the car to an angle of forty-five de grees from the line of parking. The ma chine can then be easily backed out. A pulley and cable attached to the motor furnish the power for both operations, which require but a minute. @ Telephone-line trouble shooters, search ing for the cause of the tailure of two trans-continental wires in Nevada, dis- coveréd that an eagle had built its home between the lines. Pieces of metal among the material of which the nest was built had caused a short circuit. POPULAR MECHANICS Growing Importance of the Tin Can Is Proved by Figures In the light of its utility, the lowly tin can is considered one of the most impor- tant articles in modern commerce. Large- ly because of its efficiency, the canning industry with its millions of invested capi tal is possible and the United States is able to export products to all parts of the world. The value of canned foodstuffs that passed through ports of continental \merica in 1923 exceeded $100,000,000 nearly four times that of the year before while the total output for local consu: tion was more than a billion doll Canned peaches from the United St are now shipped to 100 different countrie salmon to eighty-five and beef to eight \t the beginning of the can-manufactut ing business, the work was done by | and sixty were considered a good d work for one man. Now, a large factory can turn out 9,000,000 a week. Waste Steam Used in Advertising Shows Coffeepot Boiling Waste steam from the exhaust laundry in a southern town has been to good use for advertising to call tion to a display announcing a bra coffee. The sign occupies one whole of the laundry building and depict children seated at a breakfast table from the spout of a large, mock-perco the fumes of steam piped to the a 2 a Bom Sar Cozily Steaming from Laundry Exhaust, This C Attracts Attention to Sign from the exhaust catch the eve blocks away and forcibly emphasi advertisement of the coffee.

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POPULAR MECHANICS 893 Dispatching Board in Current Is Needed and Where It Big City Electric Plant; Lighted Signal Lamps Indicate to Operators Where Available for Immediate Transfe Radio Static Used as Weather Warning Vireless Fan’s Jinx Harnessed by Power Company to Tell in Ad- vance When Rain Clouds Will Increase Demand for Lights os IC electricity, the bugbear oi the ' o fan, has been harnessed in a big light plant to give automatic hours in advance, of an ap- ing storm whose dark rain clouds use a sudden demand for an enor- increased volume of current. e radio storm detector has replaced bserver who formerly was employed nd on the roof and watch for ap- hing clouds. Besides being auto- in operation and costing little, as ared with the observer's salary, the ess weatherman is far more efficient, se 1t can announce storms long be —_—s oa. _ ~~ “fi » “ the first signs are visible to human Without some system of weather rvations the arrival of every summer would be accompanied, in large by a sudden drop in the candle- er otf electric lights. Unlike gas and physical materials that may be el up for emergency use—electricity nufactured only as needed. Ina big plant it takes some time to put re boilers into service and get sufficient steam to start additional generating unit Unless these preparations have all bee made in advance, the normal operati equipment could not carry the load whe thousands .of additional lights are turned on in homes and ofhces to dispe! the storm darkness The radio warning is based on the fact that summer storms are accompanied b) electrical disturbances covering a mucl larger field than the storm itself. These static manifestations are so strong that they whistle, wail and how] through the earphones or loud speaker of a receivin: set and drown out ordinary broadcasting In converting the static into signals, a) ordinary antenna mounted on the roof of the power house is used, while the dete: tor itself consists of a short-circuitin switch, spark gap. coherer, relay and bat tery; a bell, which also acts as a dec: herer: a condenser and a ground conne tion. The oscillating current set up by the static travels to and from the 1 through the spark fap, coherer and coi denser. The outfit is arranged so that the

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§94 bell automatically varies its signal as the storm approaches. From two to five hours before it arrives, the bell rings at inter- vals of from five to fifteen minutes. The difference in the advance signal depends on whether the storm is following a straight or roundabout course. The op- erator in charge of the lighting system re- gards the ringing at intervals merely as an advance warning, and pays no further at- tention to it, for it is always possible that the storm may change its direction and pass around the city. As the clouds approach, however, the bell rings oftener, until, when the storm is less than two hours away, the bell be- gins striking every half minute. serve boilers are then ordered ice, auxiliaries of additional generating units are started, and the generators them- selves begin turning over at low speed. A half hour before the storm is due, the bell unites its periodic strokes with a con- finuous ringing, though the sky may still clear as far as the eve can see. The re- into ser remain The operator, however, orders the reserve generators s with the service bus wire and prepares to carry vnchronized the storm load, at the same time short-circuiting the detector to protect the instruments against lightning. \ chart record of the bell’s operation how it worked for a storm which struck the city one day last August. At 8:25 a. m. the signal began tolling every three to five minutes, and kept up that rate until 2:00 p.m. At 2:02, with the sky slightly overcast and the sys- tem load totaling 280,000 kilowatts, the bell changed to half-minute intervals, and con- tinued that way until 2:15 p. m., when it began ringing uninterruptedly until it was short-circuited at 3:20 p. m. At 3:45 the -. ' ; « . a a ~~, _ & . * show Ss — mm mn a ed SS, — _—. es o « 6 = Putting Plates in the Eformous Shell of a Turbo-Generator POPULAR MECHANICS storm broke, and the load jumped 280,000 kilowatts to 420,000 kilowatts big generating plants supplying cities carry an enormous lighting which varies by hundreds of thousand kilowatts at different hours of the day a: night. A single one, recently complet: on the Mississippi, can light 9,500,00 average-size lights. Some idea of th magnitude of the load carried by one o these plants is gained when it is un stood that this middle-western installat has three times the year-around po that the great Muscle Shoals water-po project will develop. It consumes a to: coal every half minute, and uses 600,00 OOO gallons of water a day. lo manufacture the enormous elect: cal current needed, the last bit of value must be extracted from the coa for this purpose the fuel is ground to powder that looks and flows like fue In the furnace this dust acts like gasoli: in a carburetor, giving up its heat so c pletely that instead of the usual cloud smoke only a thin haze is seen abo tall stacks of the plant. — Needle-Finding Button Saves Cloth and Simplifies Sewing back mouthed perforations, a novel shaj button has been patented to ease the er’s task and lessen the strain on the « It is so molded that the needle slides « into the holes on the back side, elim ing useless jabbing. The thread is widely distributed over the cloth, tl ventor claims, and this tends to dect the pull on the fabric and, theretore bind the button more securely. 1 With and large ~ a sloping Poli

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yth aed POPULAR MECHANICS licemen Demonstrating Their Ability to Swim with Ease Although Fully Uniformed, While Giving an Exhibition of Life-Saving Tactics during a Water Tournament at Brighton, England Policemen Swim in Full Uniform which are placed flat on the ground, bas a . during Life-Saving Stunt 16 aaty desea auahe to 80 teate 4 in full regalia of their calling, the maximum pitch, which may ber and as the handles are turned, one side is elevated egrees, eached staging a life-saving exhibition in five minutes. The repair man thus can on, England, showed they could _ easily gain access to almost any part under spite of the weight of water- the car. The automobile is quickly low iforms and other heavy ac-_ ered to level position again and the frames, nts. Without removing helmets fitting into a compact package, two inches nd wearing tightly buckled belts high, fifteen and one-half inches wide and ttoned coats, they dived into the seventy-eight inches long, may be carried rescue” others of their organiza- in the car if the autoist desires icted as drowning persons. Us- regulation methods ot recovering n the throes of drowning, the quickly dragged their burdens he water to the first-aid stations. Frames for Tilting Autos on Side Simplify the Making of Repairs in automobile so that repairs or ents may be made easily on the e when a pit is not available, is ed with the aid of two steel frames , — Sree s operated by handles. Auto Tilted in Swivel Frames to Give Repair omobile is driven upon the frames, cess to Under Parts Man Ac-

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POPULAR MECHANICS es ae Detectives Examining Burglar Tools, Including Guns and Acetylene Gas Outfit, Seized in Raid Biower’s Apartment Beating the Burglar at His Own Game War-Time Tear Gas Is Added to Equipment Used to Foil Bank Robbers and Expert Safe Crackers ean bag again is a lap ahead of the burglar and safe blower in the eternal race between criminals and the law. The development of the oxyacetylene torch, coupled with the discovery that a rod of ordinary soft steel would help it burn through the hardest manganese steel ever made, for a time gave the bank rob- ber an advantage. Then science stepped in and produced a new metal which, so far, has resisted all efforts to melt or drill it. The com- position is a closely guarded secret, but copper, apparently, is ohe of the ma terials used. Ap- plied to vault doors, a sheet of ordinary hard steel is used on the outside, then a sheet of what ap- pears to be a copper alloy, next a thick- ness of an excep- tionally hard ma- terial that looks like carborundum, another sheet of the copper alloy, and finally the inside steel plate. Science has also turned a war-time invention—tear gas It does the burglar no good to burn or blast his way into a vault ¢ with tear gas, for no matter attacks the bank’s storehouse, he to release a dense cloud of blindi ing fumes. In the last century bank-vault construction kept about twent: ahead of the robber. In other new vault or strong box was go quarter of a century of use betor proved of the rendered solete. years, ho use of mo! plicated by the rol shorte safety per siderably the cl vault mal consta proved uct. W! vaults oi t land ted serve bank signed, thi equipped foot thicl of chille which weighe-« Tear-Gas Bomb, Showing Gas Vials, Such as Is Used —to peace-time use. Inside of Bank Vaults pounds. T!

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POPULAR MECHANICS -- Off by Acetyiene Torch Which Has Cut through Steel Door, a Tear-Gas Bomb, Compelling Cracksmen to Fiee

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POPULAR MECHANICS $1000.00 REWARD Below are pictures and finger prints of WANTED FOR MURDER TRA _ In Upper Photo, Electrician Is Tes Model of a Central-Office Burglar-A System, Wired to Tiny Window and D That Open and Close in Realistic Fas! He Seeks Weak Spots That May Have | Overlooked in the Signal Apparatus, Giv Burglars a Chance to Cut through W and Safes as They Did in Vault Door Alt Where Hole Large Enough for a Big P man to Crawl Through Was Made Skilled Cracksmen with Acetylene Tor At Left Is Portable Strong Box Contair Burglar Alarm That Rings Should an A tempt Be Made to Snatch the Chest f: Messenger in the Street

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POPULAR MECHANICS bination Knob and Box of Five-Inch Door after Yeggs Equipped with tylene Torch Burned it Out of Door Release Bolt Action So Turn of the le Would Oven Way to Contents of osed!y Burglar-Proof Chest Left, Bullet-Proof Shel- ter on Wheels, with Bullet-Proof Glass Win- dow, Protects Police Rifleman Police Wireless Operator, Above, Keeps in Touch with Flying Squads in Radio-Equipped Cars As They Cruise City or Spread Cordon about an En- tire Section to Close All Roads to Fleeing Band of Bandits There Is No Explosion to Awake the Neighbors When a Modern Bank Bandit Burns His Way into a Vault with His Noise'ess Oxyacetylene

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900 POPULAR MECHANICS \ Automatic Telegraph Printers Connect Police Stations to Flash Details of Crimes; Right, Inside of Vault Door Wired for Burglar-Proof Locks and Tear Gas The Fingerprint Exnert in a Few Min- utes Can Find Any Wanted Print among Her Thousands of Records, While New Process of Sending Pic- tures by Wire Spreads It over Country Massive Circular Vault Doors, Studded with Huge Bolts and Armored with Fire - Resisting Steel, Offer an Obstacle De- signed to Discourage the Best Cracksmen

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POPULAR. MECHANICS: £ id we i i torcycle Policemen Capturing Bandits Who Have Been Forced to Flee from Their Car by the Explosion of a Tear-Gas Grenade Tossed by One of the Pursuers

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902 POPULAR MECHANICS the largest made up to that time, but five vears later the New York federal reserve vaults doors were made just twice as thick—ten feet of the hardest steel known. lor a long time it was believed that the ball type of manganese safe was im- pregnable. It was drill-proof, and _ its peculiar type of door construction offered no chance to pour in liquid explosive, while the offset combination locks re- sisted the sledge-hammer cracksman who knocks off the dial and punches out the tumblers with a steel rod. Then came the development of the port- able gas torch and the fluxing rod. The rod is just a bar of soit steel. Held with its point against the hard steel, just where the flame is applied, this rod oxidizes with tremendous rapidity and an irresistible temperature is developed. Even then the makers of the round chest believed it was safe, because, they said, any attempt to burn through it would be useless, as the heat would destroy the contents, and so give the burglar nothing for his pains. Jut a clever gang of robbers melted a tiny hole through the three-inch wall of a safe, and then inserted a funnel and filled the inside with water. Then they burned out a plug, leaving a hole big enough to insert the arm, and fished up the contents through the water. Now bankers are wheeling their manga- nese safes into a vault equipped with tear gas. The inside of the door is a maze of steel wires, running over small brass pul- levs and held at tension by strong springs. The wires cross every section of the door, The End of the Road at the Id Cell House at Sing Sing and even crisscross over the com] box, to guard against any att knock off the dial and punch tumblers. If the wire is broken place, the tension is released, two | proof bolts shoot home, and one trips a trigger, which releases a driven plunger in the tear-gas co: breaking the glass vials and ré dense clouds of the unbearable ga The introduction of gas is onl the many changes made in moder Doors in the bigger vaults are 1 made with stepped or tongue-and edges. Instead they are plain con plug the opening like the stoppe bottle. Tests revealed that poured into the cracks of a stepp: would exert tremendous leverag the sides of the steps, forcing out, while with the plain cone t blast can only blow out into the into the vault, without tearing door. While new burglar-proo tear-gas bombs and special constr are being extended to protect burglars, bankers still put much o trust in electrical alarm systems, a1 of the latest models are so complete be virtually proof against an) attack. The electrical alarms, lik: used on stores and residences, are d into two classes, local alarms wit! on the building to attract passer police, and central-office alarms, a silent signal is flashed to head of the burglar-protection compa dispatches armed guards to the

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To. stones Once in Big Demand for Use as Talismans black pebbles, known as toad- ich toads were reputed to carry eads, though of little beauty as were highly esteemed during because of their alleged heal various kinds of digestive ind for their supposed protec- ence over children. The wearer is thought immune from tooth- were held as antidotes for poi- believed to warn of the approach mous reptile by imparting a ensation to the flesh. ages Twin Roller Bearings Absorb Shocks ind Reduce Amount of Friction Roller bearings in conical-shaped twin units to ab- sorb shocks and reduce breakage and friction un- der heavy strains, such as in rail- road-car service and similar uses, have been pro- duced. It is claimed that the additional con- tacts they afford take up jars, pre- vent slipping and consequently cause less wear. They are _ inter- changeable’ with rd roller bearings, are not difficult ll and are said to reduce mainte- oOsts considerably. No Eggs Boiled on the Planet Mars Temperature Tests Prove ng to the rare state of air on the Mars, it has been shown by a gov- scientist, water there will boil uch lower temperature than on the lo determine the degree of warmth distant sphere, the experimenter a ray of the planet’s light upon two ires, thus setting up an electric cur- hich is measured by delicate instru- The temperature of Mars, accord- the scientist, is from twenty to forty es cooler than that of the earth. This | make it impossible to boil eggs on lanet. POPULAR MECHANICS Worn Like Nose Glasses, the Novel Eyeshades Fit Close to Lids and Lashes Eyeshades Serve as Extra Lashes to Shield against Sand and Sun Fitting snugly into thé eve sockets and just over the lids, light celluloid e\ eshades of novel design have been placed on the market. Less cumbersome than the larger kinds, they are said to afford ample pro- tection against bright sunshine on the beach and elsewhere, and also from dust and sand. They are manufactured in a variety of colors and do not interfere with the vision. Auto Valve Adjusters Save ‘‘Gas”’ and Keep Motor Quiet To keep valves in gasoline engines at the proper clearance, regulating notched dials that can be quickly help of tools or much work, have been invented. As the valves wear down, a turn of the adjuster with the thumb and finger quickly tightens them and secures the proper clearance, eight- thousandths of an inch, by means of care- fully measured notches at the side. The attachments are said to eliminate the noise and rattle of loose valve tappets and make the motor run more smoothly. attached without the @ Railways in the United States use 8/,- 500,000 new ties every year.

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POPULAR MECHANICS Designer of the “‘Family’’ Dolls and Assistant Painting the Faces and Attaching the Arms After B Have Come from the Lathe; Typical Costumes Are Seen at Right Fireproof Paint Preserves Building Enveloped by Flames Covered with paint containing a solu- tion said to make oils fireproot, a building erected for a test by flames failed to burn alter straw and kerosene were scattered er it and lighted. A similar structure to which the mixture was not applied was totally consumed within a few minutes after the blaze enveloped it. It is claimed that the chemical can be used to make rugs, laces and other cloth fabrics fireproof without injuring the materials or changing their appearance in any way. a ue WA Leaving Building Painted with Fireproof Solution After Unsuccessful Attempts Were Made to Burn It Teaching of Children Is Made Easy by Groups of Dolls Instructing young children th: their play has long been one of the successful teaching methods. This ciple is now being applied effectiv: sets of small wooden dolls originate former teacher and already adopted | schools of several western cities for kindergarten and primary depart: Realizing a child’s fondness for “p! house,” the creator of the toys ha the dolls in “family” units, one rep: ing the professional man and his hold and others the business m farmer and the Indian and their tf Provided with these four grou child has a natural incentive to dre according to their station in societ work out, with pasteboard and m cut-outs, the proper environment fo The dolls are turned from wood a1 sist of a head, body and base with arms. The “parent” dolls are e inches high and the “children” on shorter. Faces and hair are paint with durable enamel, and the mat dress is leit entirely to the ingenu the children. @ Church bells made of an alloy of num and copper, weighing about one as much as those of the usual bro being used in a village near Colog

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= asy S Thousand Pieces in Table nly Thirty Inches High ¢ of 69,260 pieces of hardwood erent kinds gathered from all e world, an elaborately inlaid le has been completed by an netmaker, who spent approxi- (00 hours on the task. It is only hes high and the top is forty- enty-eight inches. The largest vood used was only three- of an inch square and the hree-sixteenths of an inch. By tching of the woods, many un ir combinations were obtained Pocket Microscope Has Strong Lens to Reveal Minute Ob jects ng into a case so small that it may | in the vest pocket, a microscope made for scientists, students, doc pectors and others who cannot ently carry the heavy standard in trips. The lens is strong wered Folding Microscope Extended and Being Put in Pocket in Carrying Case for examining minute cell struc- nd for making blood counts. The ent is equipped with a reflecting tube of standard length, invisible ive and other parts common to the ory device. Case and body are made tal and special fittings shield the lens dust. POPULAR MECHANICS 905 Date Book in Department Store Aids Keeping Appointments In a San Francisco department store is a public date book for the purpose ot Telling the Date Book Where Friends Who Missed an Appointment May Find Her relieving persons of suspense and worry, and preventing waste of time in for friends. In case an appointment is not kept at the specified hour, the one who has arrived may leave a message i his companion, who has but to look the book to tell where they may meet Other messages may be written and thi book serves a convenient “silent secre tary” for the public. Anti-Dazzle Light Bulb for Auto Has Two Filaments Blinding glare from automobile head lights is said to be practically eliminated by using bulbs with two filaments, one giv ing the normal driving light and the other shaded by an ingeniously arranged metal cap to cut off the upward rays that a lazzle oncoming / drivers. A switch 2 brings the shaded . filament into op- ~% J eration at the ap- proach of another car. The cap projects the light to the top of the reflector, result- ing in a downward illumination amply sufficient for the driver. The normal beam from the other filament is said to provide plenty of side light. The bulb can be ad justed and focused to almost any head- lamp with little alterations in wiring.

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POPULAR Seaplane Taking Off from the Sur- face of a Quiet Sea to Soar above a Squadron of Powerful Warships MECHANICS With the New Mosquito Fleet Armed Aircraft Developed as Aids to Fleets of Big Battleships It Was Believed They Might Render Obsolete tgs ‘E belie, ed by manv to he a weapon of T ] warfare that would render big battleships obsolete, because of its ab lity to cover wide ranges at great speed while lelivering destructive blows upon enemy positions and fleets, the airplane has been developed as an a most indispensable aid to naval units engaged in tactical maneu vering and long-distance firing Although the United States made considerable progress in developing ierial mosquito fleets for bombing and torpedo attack, and to lay down effective moke screens as an impediment to enemy offense, much attention has been paid to their value for scouting over the seas and as an aid to directing the fire of gunners who may be out of sight of the targets Due to the tremendous range of the larger naval guns much of the firing is directed at points not visible from any part of the attacking I.quipped with radio- navy has vessels. sending apparatus, the airplane ca up an advantageous position thousands of feet in the air, and fror point observe the effect of the shell municating valuable information fire-control quarters. In addition to spotting the fall projectiles, the airmen observe pert all changes in the course and of moving enemy ships. For this pu special instruments are employed t late the time consumed for sucl On board the attacking c1 range and elevation of the rifles justed to conform with these dat lo combat the watchfulness of thi observers and scouts, opposing are set against them. To repel battle squadrons are launched which practice may result in spect conflicts in future wars far scenes of the principal engagements vers. abo.

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POPULAR MECHANICS F Ween Addd dtd odotd td Lids di didi isiiliisiiie diiiiiiiwuiiiliiiilliii, Launching a Deadly T pedo from a _ Low-Flying Seaplane, Which Sends the Destructive Missile Speed- ing over the Sea to Explode against Hostile War Vessel Lying Helpless before the Onslaughts of the Swift Darting Ships of the Air That Strike and Then Soar Thousands of Feet above the Scene to Watch the Effects of Their Work i A Tempting Target for the Air Warrior's Aim; Aerial View of a Giant Warship under Full Speed but Which Is Not Fleet Enough t Foil the Swarm of Powerful Bombs That Pursuing Bird men Might Send Crashing into the Huge Hulk; Smoke | Screens Are Designed t Obscure Such Vessels from 1¢ Watchful Eyes of En- emy Observers B® ", cy my i of 7 ‘

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POPULAR for numbers of air to accompany the war battle conditions. For some have been carried aboard the battle s, from which they take flight by apulting that project them ind. Once cleat the fliers’ engines take up the propelling the planes. When he parent vessel, the seapla on the w ting - carr necessary large | mes vessels undet lanes ip of cat means devices vreat speed into the w ie dl eC ks, te nes nd are raised on the deck ships are val fleets for tl ot accublibierts e them to sea uitable irriers ater a aces ier a ded t to the n fiving machines. providing furnish th eplacement 1 in the h rorces ot besides quarters fof lanes, em with parts. ulls of the mother unassembled set up on short n Quarters lso provided crews. TI upper deck ot unobstructed and a take water land A e accommodate vhich can be ‘n needed. q m OTICcEe are a ving 1e offers both an eld for the iplanes doing away with SC. and tor laterials for creat bombs ‘reens may be dis th mi units carriers be irom fleet called oth its own and the from the enemy by meat e Frequently an a upon to protect b i\ ] iClel time repairs, Storage MECHANICS of the vapor curtains In case the | ships are outnumbered and forced to draw speedily from the vicinity of ¢ forces the screens might be emplo confuse the opposing observers, e1 the movement to be made with no loss to the retreating craft. icals used to lav down an aerial tain, cause a mF nse foglike cloud to out behind ti: irplane which, being ier than air, me scends to in a wall p ] StnoO Vaporous ractically is trable to the eve. In making an aerial-bomb raid, the purpose of the air force i confuse the commanders that their tion , ¢ . t iting them break their battle formation, thus we ing their eee when actual hos begin. Increase in weight and po aerial projectiles ha _— air fighting of ‘at wort! in launching the missile fairl on moving targets has placed tl in the class of capital eapons. While it is possible to sink result of aerial attacks, the target to move freel tion lessens the nun avoid serious struck by a enem\ on the cause control ere . and ¢ S about in; of hits at even were charge, but seacraft are forced to dodge water, the movements break in their In 1 wer ]- camace descending a ie form ‘| he ( the ocean sut is diverted from the line of was and to cause the ; this fort eitect Mosquito Fleet of Naval Aircraft Preparing to Rise in Battle Formation during Practice Drill in | Aerial Bombs against a Series of Floating Targets

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POPULAR MECHANICS

he Big Battleship Guns Did to the Target at Range of Several Miles; Sailors Inspecting and Repairing Slats for Further Shooting Phantom Ships Aid Naval Gunners of 400 a minute. Various color to Perfect Marksmanship may be used and workes into terns, such as are found in « ncing proof of the accuracy of with slight adjustments to the luring maneuvers of the Pacific Because of a seen in the shattered latticework ning through tl huge floating targets placed several can attain grea rom the firing line. About the | a warship’s side, the framework ot the marks was found pierced se\ mes in the center, while some shots rated at what weuld hawe been. ap- mately the waterline of a real vessel. the practice, sailors were dispatched ke exact reports of the locations of and repair the slats for further Broad strips of canvas, stretched e and across the target, made it it great distances’ and increased emblance to an actual ship. As it lightly about with almost every ment of the water, the utmost pre In aiming is necessary in order to i. direct hit. Mesh Bags Are Woven from Wire by an Automatic Machine Weaving Wire Mesh Bags on Machine That and Solders 400 Tiny Rings a Minute ter cutting rings from wire fed to it ls, a machine that weaves mesh bag With some size . mesh, the ring »< aci é Vez Ss Ss ags, i some sizes Of mesh, the rings and solders the tiny loops at the rate be made at a rate of 700 a minute. Makes can

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910 POPULAR MECHANICS Yacht Is Held Steady as a Liner Paper Made from Cotton Products by Twelve-Ton Stabilizer Points New Use for Crop ickness is said to be next to impos- Paper of various grades is being e 230-foot yacht, completed not factured from cotton by a Tent by the Krupp plant at Kielforan company. In the success of the vw a possibility is seen that prices may be reduced whi cotton grower is afforded a ditional source of revenue use is made of the cotto: products and of the fibers in and stalks that are now dest: Bond, blotting and book p have been made, as well as ; cotton sheet use; radio boards and fibe: noiseless autom: gears. The cotton chemically treated, so employed by mani turers of motion-p Yacht ‘‘Vanadis” and the Twelve-Ton Stabilizer of the Type Used on Ocean Liners to Keep Vessel from ing and Rocking on Voyages at Sea American millionaire, due to the fact that films, artificial leather and silk and it is steadied at all times on voyages by a loid, and demand for it will be ¢ twelve-ton gyroscope. This instrument, stimulated, it is said, if the cotton which has been in use for some time on becomes widely used. ocean liners, is said to prevent the vacht “ rolling more than three degrees so that per- ? sons on board are not compelled to under- Wax Produced by Insects on T go the nervous strain of constantly seeking Used for Candles in China to maintain their balance, one of the chief causes of seasickness. The stabilizer con- In some of the inland provin heavy wheel, revolved China, the only light the native at high speed by electricity and suspended when darkness falls is that shed b in such a way that its motion keeps the candles made from wax secreted b ship trom tipping to either side even in insects which attach themselves stormy weather. boughs of evergreen trees. Inada : they begin the formation of a white @ Parasites usually form the nucleus of substance. This is scraped off, melte pearls about which several delicate layers passed through strainers to remo\ of material are deposited. purities and is finally made into ca ‘ +4 . Sists principaliv Ola

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POPULAR lucts Cost More than Furniture, vernment Figures Show automobile industry in Amet n to such tremendous pro t the country now spends ove: a year more on cars than furniture, and more in salaries eurs and garage mechanics than chool teachers, is shown by gov tatistics. Other figures disclose United States spends over $500,- vear for candy and ice cream, the value of the pearls in New alone is placed at $700,000,000 iaTs Tiny Camera Is Built under Lens with Jewelers’ Tools ring the use of jewelers’ tools and ry glasses in its construction, a e camera with parts that work, than an inch in length, has been the royal doll house of the queen nd. Three months’ continuous experts was necessary to com e tiny instrument. All pieces were by hand and carefully checked reer cameras to insure accurate The lens is a minute disk of and the shutter may be operated ie as in the real article. A small ‘ ior autographing is provided in a = on the back The bellows can be Camera Outfit, Part of Furnishings of Queen of England’s Royal Doll Palace opened out and folded for inserting mera in a carrying case which has iurnished to fit it. An album, neatly | and decorated, is also a part of the photographic outfit. MECHANICS 11 Realistic Figurehead of Woman in Fashions of Ear‘y *50’s, Adorning Prow of Clipper Ship Figurehead on Clipper Ship Recalls Old Romance of the Seas In the days before the advent of the steamer, when “ships were wood and me: were iron,’ as old sailors like to say, one of the picturesque and romantic feature of the famous American clippers and other craft of their type was the ornate figure heads that adorned their prows. Elabo rately carved, these designs sometimes rep resented such allegorical conceptions as the “Spirit of the Sea” or the “Queen of the Winds,” while others were lifelike representations of the sponsor of the ves sel or the wives, daughters or sweethearts of the owners or captains. One of the few clippers still in service carries at her bow the figure of a woman quaint! dressed in the style of seventy years ago Politics also entered into the custom to some extent for the “Constitution,” o1 “Old Ironsides,” carried as her figurehead a statue of President Jackson im port the figure was beheaded by some person who believed that the statue wa One night inappropriate tor naval uses. It was re paired and now stands in the grounds of the naval academy at Annapolis Qin one which is said to be the best-paying line in section of a Brazilian railroad the world, there is a drop ot 2,600 feet in seven miles

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912 Paper Hat Parasol for Men Serves as Shield from Sun or Rain Protection from sun or rain is provided by a paper parasol that slips over the top of men’s hats and is held by a rubber band Hat Parasol in Place with Ribbed Edge Extending Well over Wearer s Shoulders elastic. The flaps that hang over the brim can be folded in nine differ- ent ways, thus shielding the wearer at anv desired angle while the exposed portions of the shade may be printed adver- tisements. are manufac- tured also in thin sheet rubber with rigid side strips, while those made from ordi- nary or piece of with Special tvies paper or with cheesecloth backing have been found serviceable even in heavy ains. When not in use, the parasol can 1,1 | 7 7 e folded up and placed in the pocket. T 1 1) Watches Are Broken Up by Uncle Sam to Test Skill of Makers Besides testing all kinds of time them in nd baking ovens, U takes watches apart and breaks then that they be repaired by applicant Lor ers’ certificates. than 200 pi freezing rators a them in may watchmak watches contain More about so small thimble. which are screws, some of them that 20,000 of them pieces, one-third of POPULAR MECHANICS The man who can mend and reas these delicate parts and make t accurately, the government con: amply proved his skill and he is a diploma. Good timepieces are « to run accurately regardless of t] and One way tests a watch is to run it for tw hours in an oven heated to ei degrees and then place it on ice same length of time. A gai seconds at one temperature and ; five at another is considered a tot of eight. his is corrected, if Pp the man who “rates” the wate ing the little screws in the bal to different hol. rim. Notation « the tests repe ] - weatner. the same in the Rattling Toy That Shoots S; Adds to Fun at Celebrations Showers of brilliant rattling noise are made simult with a novel toy designed for cl even grown-ups when they celebr: ous occasions. It consists of a or hollow sound chamber, at on: which is a ratchet device and a metal preparation which sends o when it is turned under a To operate it, a short handle ju the disk is grasped and the to clockwise. The movement turns and causes the ratchet to snap. | pieces may be renewed when thi dim. <A similar device wit noise-making attachment is proy sparks spring grow — a When Whirled Around, This Toy Sh Sparks and Makes a Loud Noi sparker wheel rotated rapidly | a string that rewinds automatica in a hollow grip.

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> POPULAR ne View Co MECHANICS hing Part of a Large Consignment of Imported Gold Bullion; the Massive Scales Are Delicately Adjusted So That There Is Slight Chance for Error in the Heavy Balances World’s Gold Flowing to America Coins from Foreign Governments “Naturalized” in Melting Pot to Fit Them for Minting into American Money ing into United States money ts at the rate of $37,000,000 a month, ntire output of the world’s mines for first half of 1924 was absorbed. At nt the stock of the yellow metal held s country is a little over $4,000,000,- sum which requires almost $200,- ) additional each year to keep prices ed and to meet the financial needs ving industries. Since not more $50,000,000 worth of gold is annually iced in the mines of this nation, the ence must be imported. terest on loans to European govern- and payments of war debts form a part of the stream of precious metal ours into the coffers of Uncle Sam's houses, while commercial ex ses help to swell the supplies com- im those nations where large mar- rT, 1 - e . 4 \\ [TH gold from foreign countries GO ness kets consume immense stocks of American All gold entering the country in the form of money must pass the “natu ralization” process of the assay offices, as most of the other governments employ alloys in their coins of different standards from those contained in metal currency of the United States. The consignments are unloaded from the hips under heavy guard, while a crew of workmen pile the boxes or sacks onto handtrucks on which they are conveyed to waiting vehicles and rushed to the assayers. All packages are caretully opened and the goods. steams contents weighed on gigantic scales, del cately adjusted and as accurate as chem ists’ balances. Great melting pots reduce the metal to a molten state in preparation for the proc esses of separation of the alloys before the gold is permitted to pass into the

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POPULAR MECHANICS Copyright, Ke One of the Huge Melting Pots in the Assay Office Where Foreign Coins Are “‘Naturalized”’ for American M by Extracting the Various Alloys from the Metals hands of the mints. Piled in heaps, the ening, the bars are removed fr: coins are shoveled with large coal scoops holders and subjected to examinatio into the smelters, where they become a_ ing which they are weighed and st semiliquid mass. Chemicals and electric for shipment to the mint or stor treatment are then applied.to divide the subtreasury vaults, piled up like cord pure gold from the mixtures of other met- During inspection each block | als. Alloy standards of France and Eng-_ fully tested for purity by expert land being about the same as that of the certify it by stamping the letters United States on the suri mints, coins from A - Sometim« those two coun- - : bullion is sent tries can be nat- 7 the foreign uralized or re- tries in hea minted with little ej : carefully i1 difheulty. These 3 ? — in strong ire loaded in the ; , Most of t! pots, and when a7 ; 2 ‘ ping contai melted down, are e i — such consi poured into molds, a as well as arow atatime. As - a Moi are made each laver of the ; SS ¥ - inch lumbe casting boxes is the holder filled up, powdered i -—" about the } : + - Ss , 4 . . ] : e 1 charcoal as scat- cigar DOX. tered over the ee “ay ae filled, the p metal and another ; require two tier of molds is ; as lift and c placed on top, this : to the truc! process being re greatest peated until a ducing are vall” of gold Soa world 1 . vadih. he a i . iricks remains to v . ; Atrica trom ' . Casting Large Ingots of Gold in Moids for Storage in Afric . z OO After hard- the Treasury Vaults the large

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POPULAR MECHANICS Above, the Gold Refining Room the U. S. Assay Of! fice; Center, Pou ing Molten Met into Bar Mo f Storage in Va Below, C

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POPULAR MECHANICS he ne metal for minting and that used A large force of assavers is to reiniorce the treasury holdings is pur busy in the v chased Ma of the big ocean liners «i veighing rooms, fo1 ceipts of gold are practically alw STH seawesanas. Tia TLS bb SOTUDERDLSEE Sh My are = ry Bureau of Engraving at Washington, Where Uncle Sam Prints the Crisp New Green and Yellow Bills Save Handling of Stacks of Gold and Silver Coins 4 rry millions of dollars worth of gold on in advance of the consignment every trip. abroad that there is seldom a quiet s« Gold consigned from foreign points to except during the tourist periods banks in this country goes immediately although these travelers leave a su to the United States assaying office and timated at $400,000,000 scattered experts determine its value to a penny be the cities of Europe and the Orie fore it is accepted by financial concerns. does not affect the balance of gold Egg Cups Carved from Bits of Coal tracted considerable attention wit with Pocket Knife and File polished egg cups and various orna which he cuts from pieces of hard Working with a pocket knife and a file, coal. In appearance, they resemble an English wood-carving expert has at- of jet and are given added beaut markings which compare with t in costly woods. The maker i have spent fifty hours in fashioni: cups shown in the illustration and various prices up to $200 offered | collectors for the unique objects © Chemist Makes Sugar as Plants from Carbon, Water and Lig! What is declared to be “one of th« est triumphs of modern times,” ts re to have been achieved by Dr. E. C. | of the University of Liverpool, |! Copyright. D. ji Helden Making sugar in a way similar to - whic ants pt -e it. The prox Finished Cups, a Chunk of Coal and Simple Tools the vhich p! ames | oduce it eee Expert Carver Uses sists in exposing carbon monoxide

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POPULAR MECHANICS nill Built upon Stilo Generates ywer and Light for Farm short steel tower on foot silo, a specially de vned by a Minnesota ifficient electricity for and barn and for run ie farm implements afid ippliances, such as the washing irn and vacuum cleaner. The tored in a large battery in the e house and the main is conveniently placed in the top ol the wheel is el y oA ht, } - 1 eround where it catches almost of wind, and just below is ight feet uare, for use ; , White-Rooster Emblem Town Erected or repairing the Station to Advertise Its Pou try B hored to the con wheel Ase Fifteen-Foot Statue of Rooster severe wind ; partly due Built as Emblem by Town hat the off ce: ay that whet strikes them wheel is up to open up and es through, the pressure. Announcing that it boasts the honor of being the greatest poultry-raising cent: in the world a California town has erected a rigantic replica of a white rooster at it railway station. The figure, with its stand is fifteen feet high and is mounted on a wooden pedestal with a picket fence sur- rounding it. Plainly visible to passen- gers passing through, the emblem is prov ing a striking and effective advertiser for the town and its enterprise Music Twenty-Seven Centuries Old Written on Earthen Tablet B ibylonian music, be lieved to have been composed about the ve: S00 B.C and possibly belonging ] } i een discoverer Power and Light Plant for : ation on Top of Silo represented a

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918 A sit has bee seat al POPULAR Single-Wheeled Motorcycle Carries Rider on Inside of Rim igle-wheeled, n invented in e held on a ft motorcy cle MECHANICS verts have found that the “loadir ] used able th in in telephone comm to lines lererore Inventor W heeled Rider ar outside the tra ridet S he Cal the vel regulat ased ~ whicl outer revolyin pulleys. Testing Single- Motorcycle That Carries d Engine on the gS tire Power is ay] rim, the sit Rim ction and CarrTvi + - om ~] + leet are cCiose t easily regal! icle should ti Oo steerin | speed ot messaLre Irom five to laying of a new type is to connect aly for the firs erable speed fa peen messaves DY recelving apt 1 »~w changes in tl Field linked the contine Greater Speed in Cable Promised by New Line passes Ove r rectly to the e] affording e load. The rund t a € IT Case de d by a Messages Is to be in ‘s with the cable k directly ce Cyru 58, consid \ e ne » tl li 1 devised a epower. longe low lights. r unicatior iid under the sea abl e about cent n Ner cent } c¢ most prepara it ered, W ( about t] IS said, “ove pul cout tvpe oO! on per core, highly ion vet Mund in ne centt Fog-Piercing R to Guide Flix been found, tr: through readily discover shione dense | the sur ic lights o his is beli wave lengt Tests with fog fat than blue let light, just as ed that d oil lamy laze, illu rounding a f many tit eved part h of the this ray watched with great interest both and + ator but 1 ICK may sailors. may be ening ~ comme wreck At a hi enjoying p suddenly find hi 1? I rh = il — 1 bank when hi D» nie ros Causes OT ¢ aiong roci Cc iltitude, ertectiv ¢ mseit in Shields on Car Wheels Reduce om the ear bsorbing mse on can bee n rat materials on 7 cars in the Li ( reduced to such a de be heard ticking te while a train is runnit me partly by putii floo

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POPULAR MECHANICS Pottery Molded like Clay ds No Burning or Glazing manufactured from a patented n is being put on the market While the exact nature of al is a trade secret, it is known n sand, sulphur and various met- ned in such a way that in making , the mixture is simply poured and allowed to dry. It needs ng or glazing, it is said. Its nat- a brownish-black, but other e obtained easily. Urns, vases, ises for clocks are a few of the ng made from the material. Mats Woven of Old Auto Tires Durable and Won’t Skid automobile tires are put to mats by a inufacturer who has patented durable door lhe tire walls are cut into ng links each of which is per- both ends and then connected ized wire. Mats of various are easily con- said to be quickly + proportions hey are Extend- the Links mfortable to stand upon, and ip. They have been found useful industrial plants, elevators and nts and are said to be so resilient hes dropped upon them are not to break. tion of nce 1920. cheese to America has Hitched to Cart with Pony, Collies Autos and Help Pull Collies Trained to Pull with Pony Help Give Cripple Airing Are Sa e from Fearing which 1° ‘ collie aog that his trusty ; persisted in accompanying him when he went driving with his Shetland pony, would be maimed or killed by auto- mobiles, a cripple in a western city finally hit upon the ingenious scheme of hitch- ing the dogs to the rig with the pony. Each collie is tied to the shafts by a rope and helps pull the car by a small single- tree and tugs. The three animals display splendid teamwork, their owner declares, and trotting along together, seem to en- joy giving their master an airing. Spray for Cleaning and Painting Works at Touch of Trigger Operated by a touch on a trigger placed Pp, a spray been clean has for engines, insmissi1on rock and pneumatic [ kind com run ade drills drills of all b vV means Ol pressed air in con nection with kero sene or It mav be lo! secticides gasoline. used applying | also Wood creosote, paint

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POPULAR MECHANICS Right, ‘“Clicking’’ Ma- chine That Cuts Cuffs and Linings; Below, “Laying Off’ Gloves on I »t Metal Hands

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POPULAR MECHANICS hat Graced Hands of Notables of Past Ages; Pair Once Owned by Queen Elizabeth, Style Worn by Bishop of Fourteenth Century and Embroidered Gauntlets Fashionable in 1600 Tailoring Leather to Clothe Our Hands Glove-Making Industry, Once Art of Ancients, Manufactures More than $70,000,000 Worth of Products Each Year in U. S. G, OVES to the number of more than 5,000,000 pairs, enough to dress the of every person in the United are now consumed yearly by the of this nation. Despite growing ls for the fancier article, less than pairs are imported from abroad are produced by the glove facto is country which annually manu- n output estimated to be worth 000. Of the total product, about per cent consist of men’s leather due to their growing use in lustries, by structural iron workers e making and driving of automo However, the wearing s said to be about equally divided n men and women. a lew vedrs ro, most oft oves, fashion of , ag them ide of the more common leathers varieties from kidskin, a loved to distinguish the h.des of Now the bear, horse, kan 1 e dress eep, goats and calves. 1OxX, many og, Cat, anima de into comfortable and attractive for the hands. Many of the . 1 og, rat and other eloves are formed en , “11 cotton, SIIK, rades of wool, and similar Of the raw hides required for the product about seventy per cent, as 1 most of the Various tanning materials, are names are applied to the same skins subjecte d to different treat ments in the tanning and dressing esses. The English “cape” glove is formed of the skins of sheep of South Africa The velvetlike surface of the “suede” i achieved bv buffing the natural the skin against an emery-faced wheel, while the pebbled finish is just the original surface highly polished. Horse hide or coltskin leathers are divided into two chief grades. The coat of the city- beast’s better bred animal, because of the breed and careful grooming generally re proc grain of wooden sults in a hide superior to that of the country equine, work, little care and exposure are likely to produce coarse and scrubby ski From sheep raised on Arabia, 1 where rough come eathers known by Phese animals habitants of that re permitted to month of the higher land prot quality than the of the valley hile ul ound on the erTrou skit received in tl the tanners at

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POPULAR MECHANICS Betore t| tories, they are make them flat with the grains placed ing’ when under tl process also cau to contorm to the it from pulling out of shape fingers and back are cut in l one mece from a section about protection bird and its than that of the complete vater worn by all classes, glove is taken wi made of silk, soft leathers and lary varieties. the wealthy and the nobility ben “forchettes” tinguished by richly embroidered shioned, as are lets that were often trimmed grades of gloves m« the cutting than From the trimming or sides of the finger the “quirks,” the dian aped section Discoveries made among inserted at the bottoms of the finger All ancient ics ’ pieces are marked and wt point to the fact that gloves were ipped together ome time during the age of cave d Crude leather specimens have bet in long buried remains of that pet these are about the size of a sm roughly held together with though the ancient Greeks they were used more for tl inds when engaged in man a means ot decorating the untlets are all ironed 1 rhe R Xome only those of high rank completed article ere they are matched fo ‘tors bers of the priesthood covered the r color, weight, , snpHNe¢ } France Was once ie home ot and general appearance making, which was later introduce as an article Italy, England and Germany, but s have been intro has been the growth of the industt duced ages ago through the custom of United States that this country ts carrying a pet talcon on the wrist, as both Che adoption ot the rlove ~ ot wear is thought to becoming the world’s center for

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_ POPULAR MECHANICS Above, Polishing Gloves against a Whirling Buffing Wheel Made of Silk; Below, Turn- ing Ihseam Models ight Side t Stretching and Leather to Even and sirable Blemishes

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924 POPULAR Spur-Clad Climber Walks Up Tree and Cuts Off Its Top Climbin l l branches of a tatel\ hite-pit fe a hundred teet to the lower ( right, Underw With Saw Dangling at Heel and One Hand on R in Perpendicular Walk for Downward Look from Dizzy Height sawing off the top, and then sliding back to the ground, all in eighteen minutes, gave W. H. (Slim) Hamilton the title of world’s champion woodman at a celebra- tion marking the opening of what is claimed to be the world’s greatest saw mill, at Longview, Wash. With a stout rope fastened by one end to a hea leather belt, while the other end about the wrist, and with “tiller-handled” saw dangling out of the way at the end ot wrapped firmly a long line, the walks up a light literally spur-clad timber topper the sides of the huge pines. When he reaches the lowest branches, often more than a hundred feet in the air, the lumber man fastens the free end ot the rope to his belt, pulls up the saw with and leaning bac! spikes braced, saws away with both hands. The job is one ot the most dan- ope, Tree-Topper Pauses MECHANICS ous in the for thi top at the best can only nar miss the 1 1 imber camps, topper, and sometimes hit hile } is helpless to dodge. sv t {¥ ] ] fore fell; : ff ft ¢ before felling it, dama near-by young tree ie thrashing top avoided Fat Spark No Aid to Motorists — Tests by the bureau standards appar have shattered the ished belief of motor that a fat spark give ter ignition and power than a lear Che experiments conducted undet riety of conditio ill sizes of spark with the aid of a spe motion - picture to recordthe Che that the electrode erence conclu ions Ss h ape makes so far ast plosion is conce! One of the method was to place the ga ture in soap bubbl in glass tubes under sure. These fragile tainers were then with sparks generate various ways. The era showed that the nearest the spark wv nited first and that flame spread in the globe, growing larger u it had used up all of the mixture. So as the rapidity of the action was invol the spark from the feeblest flivver co on a par with that from the most e ve magneto. 1 & Underwood of a hollow Manless Automatic Tractor Plo\ Reduces Farmer’s Labors farmer's toil and plowing, new estimat $150,000,000 a year for the entire cou an lowa To reduce the the cost oft as devised a m automatic tractor plow. It is claim: the only attention this unique imple requires after it is started, is to kee; gasoline tank replenished and to adm All the inventor h ter an occasional oiling.

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POPULAR MECHANICS » is to plow an initial furrow. One-Man Flivver Plane Flies One set, the tractor will then trave Hundred Miles an Hour orth across the field by itself, ttle, spacing itself a furrow at a Weighing only 450 pounds and with a end of each trip and following wing spread of eighteen feet, one of thi course accurately. The outfit mallest airplanes built for cross-country s of a two- ractor with a epower engine. left plow bot- attached to the their beams and nearly at les to the trac lhey are so it when one in action, the rried above the i the soil. rm hangs rin sucha en it comes in with a boundary is pushed back, x a spring. This ; the drivers and, at the same time, lying has been completed at Kelly Field in service is lifted out of the soil lex. On a flight to Dayton, Ohio, it at other descends ready to enter the tained a speed of 105 miles an hour, mak To space the tractor the driving ing twenty miles on a gallon of gasoline on the plowed side makes part of a The engine is designed on the same line tion while the driver on the un- as that of a motorcycle and is specially n side serves as a pivot, thus swing- geared for running the propeller. These e plow over for another “bite.” If small airplanes, some fliers assert, herald reason, the machine should leave the approach of the day when the one man flivver machine will be commonly used. Though a trifle more tricky than the larger ones, they are considered safe Spry Flivver Plane, Built for Cross-Country Flight, Is Easily Tended Pilot Night Driving Is Made Safer by Running-Board Lights To decrease the dangers of night driv- ing, red and green kick-plate lamp sig nals have been invented tor the running boards of automobiles. They are inclosed in a wide, attractively designed aluminut casting which row and start across the field, a protects the side eel comes into contact with the of the car when , cutting off the ignition and stop- stepping i n. he motor. The inventor admits that rhe lights also ecessary that the field be rectangular provide illumina- pe and have fence barriers to oper- tion in_ parking, ‘reversing arm. One of these plows help protect the ready been used successfully at the fenders and add state College, at Ames. Since the to the appearance can be operated at night, itis con- of the car. The an advantage, particularly if the bulbs are con- season is limited, and as it leaves nected to the tail a: ler free to attend to other tasks in extra switch being it practically doubles his labor protected by tiber magnify the light. iatic Tractor Plow in Action, Showing Reversing Beam and Suspended Share near Fence ad

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POPULAR Moss Matting Made as Substitute for Linoleum and Cork and offers sound han is requ d 1 ot boxe $. Diesel Engine in Locomotive Hauls Train One Hundred Miles , F a 1vely LOT seve! MECHANICS Auto Hazard in Green Sunshad. Avoided by Changing Colo: 1 1 - An optical phenomenon, which ] the ha i Iriving, has been point lave tound that t shades green vi ] of the W eves application 1s increasing iutomohbi e < Vy scientists who | many the outside the driver's traffic-signal Oo! SOT 1) I to indshiel« from the sun lights now used in cities and the stop lamps on ears are scarcely vi ; tact that green is the complementa: to red and practically absorbs it seen through Recently, a 1 ible. This is caused transparent n smoky chart has been placed o market, which, tests have shown. 1 accurate identification of red. ligl ts and also protect t log or " - . colored visor vel

“ss. lis ight speed are c

engine as well as ‘aper operation and snce of smoke sonnets EE | te eegii Mee tes: Interior and Exterior Views pact but Powerful Diesel Driven Locomotive Tested Railway on

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POPULAR MECHANICS -«¢ Windmill on Ground days, running and stopping automatically Merry-Go-Round” Sails arate to the degree of warmth in the louse. It is said the heater needs light inging in the breeze, the ing only at the beginning of a sea sails of a quaint old tower- son, and minimum temperatures used for irrigating near can be changed at any time by i, remind the traveler that adjusting an ordinary lighting , ‘ | / : , a a a % >hinese Windmill Used for Irrigating; the Seven Sails Revolve in Their Framework, Turning a Shaft That Lifts Water in Bucket Chain from Stream to Canal +} 1e orient is rapidly adopting switch controlling the air and fuel feed ethods in industry, relics of the During the period of burning, the coal is e still abundant, and with charac- always in motion and is agitated by tenacity many of the Chinese yet device that insures complete consumption, the ways of their forefathers. thus reducing soot deposits and waste to an elaborate framework of Having few working parts to require re he ponderous sails are set at such placing, the burner is claimed to accom if the wind blows hard enough, _ plish great savings. ige to turn like a_ fantastic, merry-go-round, rotating a it at the bottom of the mill. ites an endless bucket arrange lifts a thin trickle of water from into a small canal that runs 1 Electric Coal Burner Saves Fuel and Ends Smoke Evil ie a means of heating buildings small power plants automati electric coal burner that feeds turnace when the temperature i certain point, draws its sup- hopper and deposits the cin- ash holder Designed to op- out other attention, the appa- ires only the filling he bi . ‘ : / or . 7 , — the A in Electric Coal Burner That Feeds- Fuel and Attends Ot ashes every three or tour Fire Automatically When Temperature Decreases

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POPULAR Concrete ‘‘Lumber”’ in Place of Wood to Cut Building Cost To save time and building costs, contractor patented a for making “lumber” out of concrete. The material is prepared in the form of thin, meshed slabs, weighing forty less cubic foot than ordinary to have better fire-resisting qualities. The pieces are made in an eight-foot standard length and in other sizes, in widths ranging from six to twenty-four inches. They are fas- tened by steel clamping bands and can be used not only as siding but for floors and ceilings as well. Placed on the outside of ordinary concrete columns, they are said to prevent cracking in case of fire and on interior work can be adapted for lathing and plastering and for wooden moldings. Rapidity of construction claimed for them as they eliminate the need of saw- ing and driving nails and preparing con- crete forms. It estimated that on a garage, twelve by nineteen feet, they will effect a saving of nearly $300 over lumber. a west- ern has process wire ‘ abou per and designed pounds concrete is is Concrete “‘Lumber”’ Pile and a Section of the Wire Meshing That Gives the Slabs Strength No seasoning is it is claimed, and 1en used in house construction, an outer coating of liquid cement will effec- tively hide the joints. necessary, wl MECHANICS Moving Hand on Traffic Signal Ad; to Safety at Street Crossing Fitted with a bell and a lar indicator that shows how much is between the “stop” and “go’ improved electric traffic signal installed in a western city and have materially reduced the accidents at busy intersections tl indicator is in the form of a har across a large dial, the upper hali is green with the word “go” | white letters on it and the lowe with the sign “stop.” To the |! tached a metal shield which tra circuit and alternately covers the green area and the signs. The one side is covered, a bell rings a: the red or the green light flash: ing the proper legend. This trav dicator, which can be regulated at various speeds, is of special pedestrians as they can easily 1S D oT yt h a a [ ai ~ MY \ ; much time they have for street. Another feature of is that it has a fire-alarm connect extinguishes the red and green | halts the indicator as soon as sounds. The signal made t flashing by pressing a button station. Searchlights End Moth Pla Searchlights are being used in ‘ and south Poland to save the tor swarms of caterpillars, the lat species of moth. When is the lig set up at night in the woods, m the insects, aftracted by the power were cremated when they flew incandescent carbons the ar which were not sheltered by glob: ot

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POPULAR MECHANICS lad / Keeps Players in Train Voyages; Distance Ball If Free Is Registered by of String on Dial Horseback Riding on Ocean Liners Bicycle Races, Steeplechases, Golf, Tennis and Other Amuse- ments Are Invented for Passengers on Steamers LELING the race for speed and the palatial ocean liners, there nt search for new amusements passengers interested and con luring the voyage. The old-fash- about the promenade deck, nd concert in the evening and, imateur theatricals on the last with the captain’s the grand hall, have been sup- ith elaborately equipped gym rolf, tennis-and cr deck games sea, along mming pools, +] sengers, for want of something . get more exercise nowadavs on ing than they take on land led in developing games that teur can play, from shuffleboard and it is not at all unusual to nified first citizen from home or ndulging in such pastimes as ir a three race before the passenger who takes his however, the gym- legged iously. nasiums ot the “Leviathan” and other big \merican liners; the “Berengaria,” “Majestic” and sister Cunard and White Star ships, or such boats of the Frencl and German lines as the “Paris” or “Co lumbus,” offer a wide field of choice One of the newest and most popular de vices is an electrically which can trot, turn of a switch. through the park can be done on steed, fastened to one pot For the amateur boxer wl] isn’t sati operated horse canter or gall at the One’s morning ride this he floor fied to keep fit on the weight machines and punching bags, there is a grotes¢ Of an opponent, rocking wildly its rounded and weighted lusty punch, but always coming back for re punishment on the Che deck h salt air, jue figure about on base at every rebour dl games, open to the tang o fres requiring no ‘VIOUS eX perience however. A fair game of tennis can hi play ed on the I id leck » vi h e on some and skill, remain the te lavor

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POPULAR MECHANICS Deck Tennis Proves a _ Fascinating Sport for Old and Young while Crowds Gather around the ‘“Bookies”’ Just before an Exciting Afternoon of Mimic Horse Races a et ses Zz Wer ie »

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POPULAR MECHANICS

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POPULAR MECHANICS “Bull Board,” Played by Pitching ~_—— Pads at Figured Squares o an Inclined Plane, Is a Popular D Game in Fair Weather as Is Ring Toss Trying to Throw Rope Loops over Nun bered Pegs; Spectators and Players Both Enjoy a Spirited Deck Game Which Is a Combination Hockey ar Mimic Polo Contest Played in a Wooder Frame Which Has Cross Divisions wit Gates for the Passage of the Ball ee

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SES LEIEN Se iS i ‘HANICS the Ship Forges Ahe iA 1d with Mi: Enjoyed While Deck ar LAR Ro, aming Can Be POPU Rigged to and Swin ag fater Bathir

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POPULAR MECHANICS Deck Tennis ‘Played with Rings Instead of Balls and with Net Set High over Ruled Court as in Volley Ball Amusement for Spec- tators Is Afforded in Pillow Fight in Which Participants Try to alance on Pole While Exchanging

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POPULAR MECHANICS Big Passenger amers Cross the Equa- Elaborate Ceremonies, luding Mask Balls in t of Father Neptune, 1 Presentations of the ‘ey to the Deep Are Held Celebration of the Event; set and Upper Photo w the Sea God in Cos- me and Party during the Action of a Pageant Ball; low, Father Neptune irrendering the Key to Davy Jones’ ”’ Locker to a yager About to Cross the Ocean; Mask Balls of This nd Are Favorite Amuse- nents on Large Ships and 1 Long Cruises. Realistic Costumes Are Often Ob- tained Directly from the Countries the Fun Makers Represent

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POPULAR MECHANICS “Shuffle Board’ Long Has Been Fa- vored among Deck Diversions, and Does a Not Yield Even to Jazz Such as Is Fur- Chs))) = — — SSD PNF nished by Student Orchestra Below te dete Ey

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POPULAR cularl mm the Ne ] irtl American runs, there is an amt ation in which rope quoits are stead of balls and racquets. Tl net stretched five feet from the deck and tl quoits are tossed across it, to be caught ] opposing player pie rules and scoring are practically the same as in the usual tennis Keeping several 11) 1e 1 rv the 1e game. hundred passengers imused is a difficult task. On the bigger for the comparatively run icross the Atlantic the problem more or less solves itself, but on smaller ‘ships on the longer runs, to South America, Africa and across the Pacific, the proble m is more acute. On many ips a passengers’ sports committee is organized he first day out to plan masquerade balls, ridge tournaments, tennis, golf, shuffleboard, spar boxing and other games. liners short -run sh of the long t { 1 | | de ck he special tours, where passengers are together for weeks, or even months, directors with many pro- vide social . ‘ j nt ‘ inole shi dozen assistants to a single ship. as as a These are carefully selected by the managers, and must be men of ex- ceptional tact ar ‘ulture, attractive per- social leaders tour nnlitiec cat nguists, well versed in MECHANICS countries shrew d > hi : the and, in addition, human nature. Besides all the other amuseme: is always the sport of betting in on the vessel’s daily run. This let to the making of new speed recor: ing has been resumed on the Atlant ing the last year, after several y quiet. The “Leviathan” started it b ing up a five-day seven-hour and minute record from Cherbourg t York after being equipped with oil | The “Mauretania,” veteran of speed records and sistership of fated “Lusitania,” came back wit] day, three-hour and twenty-minute for the 3,098 miles, and later steame New York to Plymouth in four twenty-one hours and fifty-seven 1 Racing ships across the ocean | popular sport. since the “Savan: 50-ton side-wheeler, cleared fror nah, Ga., May 24, 1819, and docl Liverpool twenty-six days later steamer to cross the ocean. She well steam ; entirely disappear thirty a 3 in fact, from linet sails not about as as years ago. Girl Student Passenge.s Stage a Unique and Difficult Deck Race by Trying to Balance an UO.ange Bottle While Hurrying to the Mark at the Farther End

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POPULAR MECHANICS Are Taught by Phonograph , Sing like Nightingales oh records are being used by rd fancier to teach his young to sing like nightingales. Al- nute the birds are hatched, ns” begin, the records, repeat- the nightingale’s song, being ll day and sometimes far into \Vhen the canaries are from six eeks old, they are placed near the | nightingales and are not per- ear the singing of any other en they begin to sing, they nat- the notes they have always bring a price about five times that ot the ordinary canary. h of Button Oils Auto Chassis Fitted with Lubricator Tank F or lubricating parts of the chas- sis, an automatic oiling system has been devised to re- place grease cups. It consists of a reservoir conven- iently placed be- neath the _ floor- boards, where it can be filled easily, and from which oil is distributed to the various parts through tubes by a button projecting near the driv- foot. The tank holds sufficient ix months’ supply and one push of nger a day, or less, is enough to thorough lubrication. Uncle Sam Bakes Loaves of Bread to Test Qualities of Flour erent kinds of flour are tested in one laboratories of the department of ture by baking loaves from various submitted for analysis and com- the results for volume. There is noticeable difference in the size of ves although exactly the same ties and proportions of ingredients een used and they are baked under the same conditions. When it is ach loaf is weighed in special scales refully measured. The results are ed and filed away with the name of rand of flour tested. efore any h B Government Chemist-Baker and Different-Sized Loaves Produced from Various Kinds of Flour sample is officially approved, it must meet certain requirements in the baking tests which are continually being periormed to guard against adulterations and qualities. nferior Hole Cutter for Wood and Metal Is Used Like a Wrench For cutting round holes from one and a inches in diameter and neatly in metal, wood or pr any other mate rial,a small device | used like a wrench quarter to six easily has been designe that does the work minutes. handle in a few A ratchet permits the cutter to be used in position, agains wall, ! corners or on Manual pressure is not asaturn ot a large nut applies heavy over! ead, floor. necessary the knives. Weighing only fi the device can be easily carried to a or kept on a workbench in the shop

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940 POPULAR MECHANICS Ride on Stationary Bicycle Tests Tobacco Grown in Western Canad) the Efficiency of Muscles Increases Dominion’s Crops IXxperiments to determine the efficiency While Canada has an annual of the human muscles are conducted in crop which goes a long way towat one of the laboratories at Cambridge uni- ing that country’s demand for the pt ity by putting srb‘ects — the output has been greatly incr: the successftl cultivation of the p the western prairie provinces. Alt the land devoted to it in British Coly rarely exceeds sixty to seventy acrs harvest ranges from 60,000 to 75 pounds. Due to the warmth of the leys and protection from severe weath« commercial tobacco is said to be read produced. The plants are made w heavy. foliage, are easily cured on t! farms and can be made into good « and other products. Even in A north of the fifty-fifth degree it ha shown that the crop may be culti with little trouble. Unloading Freight Cars Simplified by Detachable Steel Chutes For unloading coal, sand, grave! similar bulk materials from go freight cars, a detachable steel chute fits on the side of the car and dum; rectly into the trucks or wagons, ha ~ ie devised to save time and labor. |! Rider Taking Bicycle, Test, for Muscular Eficiency: forced by heavy steel angles and tees box holds a cubic yard or more, through tests of strength and endurance pressing a lever, an outer side door and studying their performances with spe- and the contents slide into the cial instruments. In the trials, a man While the wagons are gone, the sho mounts a stationary bicycle, which can be’ can fill the chutes for quick unk adjusted to give varying degrees of fric- when the drivers return. The chut: tion and is connected to measuring gauges easy to attach, are strong and dural to show speed and the force exerted. As prevent scattering of the material the rider pedals, he ex- hales into a mask ar- rangement where the moisture of his breath is collected and later exam ined and measured Means are also provided for weighing and exam ining he from the man’s body. computing the amount o! energy required to oper ate the bicycle and esti mating the bodily fue’ consumed as shown by the breath and perspira tion, scientists are able to make deductions as to the strength and effi- ; Emptying Loaded Chute into Truck While Shoveler Fills other ciency of the muscles. ptying Loade nute into uc e Shoveler Fills Another C to Side of Car for the Next Driver

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inada > POPULAR MECHANICS nderwood & Underwood Hit Made by a Battle Plane Using Phosphorus Aerial Bombs during an Exhibition Engagement with a Fleet of Armored Tanks Opposing the “Invading” Airmen Tank Is Wrecked by Airplane during Battle Maneuvers ng a perfect hit, an airplane partici- n an attack on battle tanks, dur- neuvers of the New York national dropped a phosphorus bomb di- on the “enemy.” When the cloud ‘ke cleared away, the moving fort- is lumbering ahead, although, ac- to the rules of the contest, it was ished and its crew destroved.” ess projectiles used by the aviator rons cause great puffs of vapor to vhen they explode to show the ac- of the aerial fighters. Observers records of the “strikes” in order to line what percentage of the mis- find their targets. Barber Shop on Auto Calls at Homes to Save Patrons’ Time r those who prefer to have their ton- work performed at home, an enter- g barber of Wichita, Kans., has d up a shop on an automobile in he calls on his “trade.” The ar- ement saves time for the grown-ups, since children’s hair can be cut according to their wishes without the necessity of accompanying them to an ordinary “par- lor.” Advance appointments can be made with the “barber shop on wheels,” avoid ing long waits for the call of “next,” and ie Se Barber Shop on Whee!ls Which Makes the Rounds of Patrons’ Homes to Do Their Hair Cutting } women with bobbed hair can get it trimmed without leaving the vicinity. @ Approximately 15.000.000 bananas are consumed every day in the United States.

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POPULAR MECHANICS “OW ilae = . “ea ” ’ . . The “William Crooks, Pioneer Mogul of the ‘“‘Sixties,"” Which Recent!'y Hauled a Train of Old-Time C on an Exhibition Run, and Group of ‘‘Passengers’” Costumed in the Fashions of Its Day

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POPULAR MECHANICS Headboards for Berths of the New Mountain Type of Sleeping Car and, Right Old “‘Number Nine,”’ the First Palace Car, and a Luxury of Sixty Years Ago How Pullman Cars Are Named Care and Judgment Used in Selecting Titles for Wheeled Palaces That Make Long Railroad Journeys Enjoyable YRDING the tired traveler a haven $38,000 eac!] rest and comtort amid luxuries metal car has not been detert e converted long, tedious railroad the modern wooden type is_ pla into sojourns of enjoyment and twenty years. Repairs and replaceme he Pullman car of the present of worn parts, however, often greatly contrasts with its boxlike ances- crease their term of service Xty years ago. ‘| he first “pal ice” Romantic and poetic } that PTrace r car, built in 1858, was composed the sides of the cars were early substituted day coaches remodeled and com- for numbers to prevent mix-ups in record none. The berths were crude af- ing rolling stock among the various rail yupared to the elaborate, cosy roads. Names of countries were first em hich are now made up nightly by ploved. Then, as many railways expressed sy porter. desires to have their stations represented the early types of parlor and by such Pullman cars as might be allotted g cars were less than fifty feet long, to them, towns and villages were selected ive length for those days, the pres- When dining and commissary cars made dels stretch for almost twice that their appearance, these were given the Steel, both inside and outside, names of popular chefs of history, among en tl © place of wood for construc- whom were such as Aberlit ‘ Ma rde itl, But the painters’ art has so thor- Savarin, and Valentin, wl savor disguised the metal, that it re- dishes once tempted the appe highly finished mahogany where’ France's royalty. the interior. Soit, velvety carpet this and her countt Prominent 1 floors from end to end, laid over ccted as names to identity ite composition that is rein- nd protected against cracking by rugated “st et ately Bible irs ; * Dbullt vearily st ot about

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944 POPULAR MECHANICS Ye How Overnight Travel Enjoyed the Scant i arters Permitted in Gloomy, Crowded Coaches bef f the Paace Ca ; Seen by an Artist of That Time mountain-type car, not because this model angle before th« re permitte ise in hilly sections but on account ment cars. Seldom is an outsid of the series of names attached to them, ual allowed to christen a car. an ll of which are composed of the word the method of selecting nam« “mountain” and one other, such as might interest patrons, serves t Mountain Lake,” “Mountain Glen,” and a desire in the minds of the public combiaations. something of the originals of the Names are selected by the Pullman com- this reason, authors, historical icials, who study them from every prominent places, rivers and pro ernment onemenrnennan oa ae neem ——nneereeneenenmnennennsee ST ee) Se PET) ee roo eae See 5 ce oe LS Sectional View of Pullman Car Showing Elaborate Conveniences Afforded Travelers Who May Embark Long Journey amid Kestful Surroundings Found in Most Up-to-Date Homes

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POPULAR rains That Aid ; ed to fill a double hen applied to-a train of ornate that help to make life comfort- yfessional travelers and railroad ittractive to tourists. Of course mes are submitted by employes of suilders and members of railroad but all are subjected to the test a are belie, 1 Coaches of a Type Now Rapidiy Passing fron MECHANICS in Providing Comfort and Safety for 1 perore sall 1 christening the cars. It is believed only “outsider” considered under the was Joseph Jefferson, the actor | came famous in the role of Winkle.” At his request a to him for use during hi named with the title of == ae 1D . , Bm) le, Aes |

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POPULAR Cypress Ship, Sixty-Eight Feet Long, to Sail around the World the way for progress is expected some d: he Great ports stean Lakes al Cypress Ketch “Big Bill n of Comme purpose e tree-cl tropic ie underta relations ports Lakes ind abroad the day whe F } waterwa n ates directly t Starts on rcial artichokes, tivation MECHANICS Che craft is of the style kno and is designed after the bo Norwegians in carrying fish t She has a_ sixteen-foot be equipped with a radio broade ratus with a range of 3,000 mile graph, gag stoves and an elal ol maps, and carries an a plant in a kerose ‘ 1> ° 7 ne-pur©rnil ads dit = ¢ siderable user was not painted ne, this being thought ] 1+ ] the aurabilit ort Making Weather for Work Quality of Factory Prod liacturing Her Two Years’ Relations ler even ce he rubber ane Thistles Prove Profitable Edible thistle buds aTe parts nd climate seem ideally suite: among certain or ( 1 1 OT ft } yaTi - | species

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POPULAR | for as much as twenty-five ind are highly esteemed as.a Growers cultivate them in hat they are ready for market en there is little competition products, the harvest beginning ind reaching its peak about the |. Last year, 500 carloads were e bulk of the crop e east where the demand for greatly increased. going to Roadside Scale for Weighing Autos Aids Traffic Survey inspectors engaged in a survey bile roads and traffic in Illinois, in their work by a portable eighing vehicles without caus- lelays or inconvenience to the e outfit was placed under a “( pl itform at the side of the automobiles could be run upon le trouble. Weight on each plainly registered on the dial as pa sed over the ale. W hile ¢ clerk was making his nota- pectors quizzed the drivers and destination of rf isiness engaged and the sort load carried. information to be used in making a scientific analysis of traffic con- ditions ( Portab'’e Platform Trafic and Highway Surv MECHANICS 947 Portable Darkroom Worn as Hood Aids Traveling Photographers When Te ru] ir not available, p! he form material that sl hood. It contai or developing At the bottom so that no light is ; ; o admitted are loose enough to permit ample freedo for the arms and hands. It can be quick wrapped into a compact package and fit in a small space in the camer t case Green Lumber Reduces Home Cost by Using Calked Seams \ process by which be substituted for building outer wal been discovered by a who uses thin boards with instead of the tongue-and To take up the during the dr have been pu calked and ci strips whi green lumber can g n ! material in houses | is seasoned s for frame Swedish 1 Inventor traight edge eroove int

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948 POPULAR Cement Guards Lights of ‘‘White Way” from Wind and Heat the heat of the lamps and jarring caused by traffic, the light sockets lo combat e View Sockets and Wire Electric Sign Cement over Newly Built 7 seen aiong anchored pt trom like ¢ement Safety Powder for Blasts in Mines Decreases Number of Fatalities sevent hve per cent of the United States are cor mines, es used in the according res prepared by William ms. statistician of the interior epared ror the n tne of the bureat hat coal mining 24.438 + ‘ re uired 2701 of explosives usndin : a dynamite th: lame, emits but lit ved by the tests for where gas mine use 11 dust are In 1902, only this. short shatts and likely to be found 11,300 pounds of MECHANICS flame powder were used in coal mi: less than one pound for every | of coal mined, while now from seven to ninety-three per cent of missible explosives manufactured for the coal-mine “shots,” or about nine pounds for every 1,000 tons The increased consumption of saf« of explosive is regarded as an in factor in reducing the number of and injuries in mines. Hoisting Tower on Auto Saves Tim in Construction Work Made of tower has been light angle iron, a mounted on the of a small auto truck by a ceme tractor to save time in moving f1 job to another. The apparatus, of lifting and dumping a wheelbar1 of cement, is operated by the the car by means ot a cable arour and a series of sprockets, one att the rear axle. When in operation Lo take ch a ins oo a & tower! the trucl

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POPULAR MECHANICS lists in Forma- ts Carnival on Seine Queer Water Bicycles Add Thrill to River Carnival Sports irnival on the Seine, spectators n a novel entertainment by the nce of a company of water bi- Supported by two boat-shaped seated upon a_ strong ‘igged between them, the rid- ‘ir singular craft in a series » 4 and formations. Easily by the handlebars, the craft are he capable of considerable speed quiet water, require but little exer- to operate them. Gold-Coated Glasses Admit Light But Halt Glare and Heat id-coated spectacles, which admit but bar heat and glare, have been fected for workers who face the high peratures and intense rays of metal- ng furnaces. The coating is much ner and more uniform than the finest leaf, and is placed on the glass by ition in a vacuum. In use, the de- gives a slight greenish tint to the that passes through. The first ap- tion of the discovery was to motion- re projectors, where a small disk of iss interposed between light and film nates danger of fire, and makes it le to stop at any point to view an dual picture. The discovery is ex- to be particularly valuable in the § movies to teach natural ols, the instructor being able to halt cture to discuss any view. ¢ sciences Magnetic Rod Helps in Picking Up Bolts and Bits of Metal For use in picking up nuts, screws o1 other bits of metal out of motor trans missions or from places hard to reach wit] the hand, a flexible magnetic rod invented. The magnetizing de trolled by a thumb switch at the base of the handle and served with electric current through cords that can be easily clipped on any ordinary battery terminal. Be- cause of its ability to pick up from one to two pounds at a time and the fact that it = weet : i & 28 AO co... Magnetized Rod in Use on Auto, and Diagram III trating Thumb Switch and Connections can work in grease, oil or water is also useful in taking out or putting bolts otherwise hard to reach

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POPULAR MECHANICS Hote! Where Guests Find Comfort Arranged for Them by Attendants, Each rained in the Part of a Host Housekeeping on a Gigantic Scale Factory Methods of Standardized Production Applied Even Serving of Your Meals by Modern Hotels 1 manager upstairs in his private the kitchen of a great hotel is factory where perhaps 10,000 are made to order in the space lelivered within fifteen nute Quantity production and stand - products o hours and ¢« house ation of service have made mie on vhole sale scale. individual waiter and bus boy pt rmitted to perform his tasks in | | | here would ning about 1 result taurant nd hotels tem to cont take vour s« d waite! pertorm cer vou study the provide napkins menu the silver, utter possibly service plates, glasses of chopped ice, and fir water carafe. In one great hot: when two diners are being set water is exactly the thirty-nint which goes on the table, and, be dinner has been finished, 100 or mot rate articles will have been produc: and then removed. [he food-service department housekeeping on a huge scale at and here the mechanical appliance save time primarily are most al lhe hotel steward, looking over can tell how many guests | ill order soft-boiled eggs on day of the year, but getting ther and served is another matter, whi ably would keep an army of coo! were it not for the mechanical eg: Clockwork, driven by a lead we ords,

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POPULAR MECHANICS tial Hotel Dining Room N} e Scores of lert Servants e for Wants f Several Hun- ed Patrons at Once Hotel Bakery Which Daily Prepares Stacks of Homemade Pies and Pastrix

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Lift That Taking Suit from Disgui sed Hotel Service De- livers Articles POPULAR MECHANICS Expeit Carvers Preparing Meats in At- tractive Portions for Roasts a 2 7 - om I asian te: ~ Ara Qe 4% ' 42 *) ‘ cy Counter with Hundre 4 ee Pree |) Pots Aw aiting - Stear ning Coffe _ Beverage | | or Tea

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POPULAR MECHANICS

Waa Va <I _ During Parents’ Absence Child Guests Are Entertained in Hotel urseries

_——— eS SS — SS Se eee

Putting Music in” Voices of Pages Who Call Guests

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POPULAR { hes the mo tive power, and n aun order for eggs come the cook dro them in a metal basket wwers it into a tank of boiling iter, and sets the indicator for the time® required, at ti expiration of which the ( are automatically lifted from the water. The slicing of bread ofters another opportunity tor machine to give satis- uests b\ a uniform product, material. A revolv- faction to the e t in addition to saving ing circular disk divides the loaf with a smooth motion, while a ratchet the bread just the width of for the next cut. TI works on a_ similar advances another slice, 1e cold-meat slicer and the vegetable parer used principally for pota- principle, toes and carro \side food, there are several instances ot { is another example appliances for time- saving in the serving and housekeeping departt vents of the great hotel he te! autograph abl Supple ¢ s the intercor } itlo é ce 1 t he tele one, sav- 1 time 0 lie r hicl ao not quire direct ¢ ( ition between sendet ind receive t e handwritn inscribed It e tra niitte is reproduced at the rece! a | I | Che telephone nstallation is, of cou e mayor mnie I ( co 1 il math t mav easily equ that of a good-s ed cen Source of Counsel for ive Hotels and Their Mace of Halls and Departments KCHANICS to handle the cal Standardization of and supplies, how the kitchens and dining system, for example, has made item of equipment, from carpet chinaware, and tries to produce anyt which could be manufactured by more cheaply than it could be purcl in the market. This company built a orating furnace and now buys all chi: the white and does its own decoratit the same group of hotels, in its fact operates an upholstery shop, printing plant, a garment fa and a furniture-repair plant. Standa ition al el ce, equi] 1 | not stop ever, adoes room every cand tory, so has been extended to sucl table materials, ' ‘ P cies as wmmen, Yiasswar;re, oan cleaning and even such st I kit S powder, oli e ol, \ 1 la eN and canned goods \s a 350.000 has been released from the it nd $100.000 a cotter 1 tory a veal saved ht ] . + ihe hotel manager, there modern justified in thinking of his plant ractory 1 hich takes interchangeable d fits them together into a custo1 matter whether it service and equipment or your dinnet roduct, no and Guid Strangers and Guests See'sing Advice

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POPULAR MECHANICS YA OO’0-00 00209, hE Private Switchboard 4 erators of da H tel s , Highly Trained Waiters Often Render Valu- ble Aid to Diners Select- 1g heir Meals nd Their Bat- tery of Pol- shed Copper Pots and Pans tae he Meals Are Served in Rooms from Pantries on Upper Floors

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POPULAR Fulton's Statue Saved from Wreck of Old Ferry Station (One ot the tirst obvect to be cared for i! bandoned terry build ing under Broo n bridge is the irge statue of Robert Fulton tor whom the 4 structure was named The massive monu ment was lowered with block and tackle removed to a For vears, river, teeming with had helped to make and sate place the firure taced the itt that his genius possible craitt Safety of Shotgun Barrel Depends on Skill in Making It When the hunter fires his shotgun, ex- ploding a charge of powder with a burst- ing force of from 50,000 to 65,000 pounds to the square inch a metal strip not more than three-sixteenths of an inch thick and within inches of his head he seldom against a few vast amount of care, scientific knowledge and workmanship that have gone into the bat rei to make it re and accurate. In gen eral there are two cl the twisted or made ft stops to consider the | sate isses Damascus barrel, and those om lid ut t g The mate- mixture of tron and steel, since teel € is 1 bt t » stand the shocl ‘ he « S10 ind pure iro too vit Mk ¢ HANICS { r ) i. 4 n, ad mad at different angement of the t ) ods betore the l eated a | ed into quart ba a | nally t Us 1; vy the ba heated, O ¢ lp 1 a square hole, and is then given « ts to the inch with a win handl 9 \iter t sting, tl ro led 1 » ribbons with the edges beve e same va two be go equire s single barrel, the one rr othe’ bre somewhat thicker than that for the n le hie they ire twisted cold into spiral, again heated, and after a steel 1 drel has been inserted, hammered u col he | | { seen, are ng a bar of metal of the proper com] tion and boring out the centet \ Dar cus. barre Ol iverage¢ qua i about thirtv vears and wil d thet ort LO0.000 shots pro ided receive s 70 tre. it has been found Percolator in Wash Boiler Cleans Clothes Easily and Quickly Out of an ordinary household boiler ‘ficient washing machine can be tor placing in it a patented tom clothes percolator which is said to clea , ls of fabrics thoroughly in tl m te It consists ota coppel base two hollow upright posts, pertor ited Sixt uur small holes through which of steam and hot suds at into tl ; , hen the wate ejected forcibly garments Clothes Percolator in Action; Sixty-Four Steam Jet Churning through Fabric and Water reaches the boiling point This action kept up automatically, the washer requis ; ae ; | lj vy ) turthet attentio1 OT rand Nn eC al no parts .o get out of O1 ler

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POPULAR MECHANICS Inderseas Survey of Gulf May Aid in Forecasting the Weather Submarine surveys of the Gulf of Mex- the Caribbean sea and adjacent waters e to be made bv a government expedi- or scientists, who, 97 Arrow Thriller in Movie Is Made by Turning Camera Backward While motion pictures are the TIsSt tus, nope to Teveal e Cruise € (pected to tinue through the ma ¢ il d down idered of great im tance to the United tates as many of the eather changes in the ithern and mid-west- states have their ori- there, and it 1 t much will be learned S hoped | ocean currents and emperatures which will ot aid in weather fore ns Off the Louisi- 1and lexas coasts and metimes near Central \merica and Peru, Ol pots occur on the water nd it is desired to learn there IS any connec on between these sup osed submarine gushers nd the oil fields on land t is also pointed out many ot t ; .) ¢ 0) le ren hers ? 1 ’ Lhriiiey4 ( ine ari at, although the gulf Staging the Arrow bounds in valuable fish, Were Pul ttle fishing 1s done there, and the expedition will investigate the possibilities in this direction. Whole-Wheat Bread without Flour Made Directly from Grain Transforming wheat directly into bread dough without the necessity of a flout milling process, has been successfully ac- complished by an ingenious contrivance of French manufacture The apparatus principally of a large crew threaded cylinder which crushe grains into a mixture of the consistenc of smooth paste. Che wheat is first thor ough] washed and allowed to stand six hours in tepid water. Yeast and salt are then added before the soit, swollen kern are put into the crusher. Thriller; with TI ’ Ir t led Out Wt Cc Vv Cr clever 1i1it ‘ t ( { t ot | € ¢ t ‘ fila recent ture ters Wa ( n Cay w hile irro i aent be WS, traced I! ou ] 1i¢ as the mbeddec e rhe eftect as ( inserti the the pul thie is cranked | er tive ‘ é , it a in 1)? at ( I ( ct ppro expressiol @ Near one t Ot zinc 1 produced In I I Ke b : r ( ( ; ( ( 1 ] rec a ] ‘ the tt ( ( | é ‘ ‘ ? n ‘ ) \ i e rie 1 { | te é 1) r t ( ( uy State

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958 POPULAR MECHANICS Furniture Made without Nails Wins beaver, and civet from the civet cat \] ' nad | ] R ne " hea U First Prize for Boy Scou- dang? Portable Highway Speeds Autoist across Shifting Desert Sands , In order to cat itomob to ove cm €-Mmile tret¢ OT t ’ T 1 17 7 1 Death Valley i portable ‘4 { ) cs . ween ae ised DV the Calhtornia road , , qiission it 1s col tructed of sectio1 ' 1 , ‘ , ‘ redwood blocks ind tit ers uid tla ' ' , ‘ the surface and bolted together. | 1 storms cover them up, a tractor, equipp “— ‘ ’ , th a crane and hanging hooks t ; ] } ] ] +] nto the evebolts screwed into the ) A 11 engths, speeds to t] e scene, Quickl the sections 5] ake the ree O! e-la them \ ¢ { po + ] + ] toa | t i | nN 11 der he Té Switchless Auto Stop Light Is Run by Drop of Mercury in Tube S | ) t ) t b S Robert S. K. B N f Bos Ww Pri I ture He Made without Nails ovement ot a littl oO erct in a hard-rubber tube, a novel stop made Of roug piece Ol vood firm for automobiles has been invented t joined won first. prize tor a boy scout works independently of the brake ye craitsman at an exhibit in an eastern city. and requires no attention from the dri Withes of wood were interlaced to form Resembling other lights in outer appe the seat and back of the chair and the ince, it needs no electrical connectior table top, while the lamp shade was con- save a wire to a storage battery and ha structed of thin pieces Ot bark and car\ no mechanically operated switch likely to ing on the stand ad-ted to its appearance get out of order In the housing just beneath the bulb, two protrud ing nickel conta wires are at ranged within the tube in such a wa that when the for ward movement ot tee\.car checked, the met Perfume Supply Is Periled by Ban on Killing of Musk Deer Musk, one of the most costly and effec- tive substances in “fixing” perfumes, may soon be dearer than rare jewels because the lamas of southeastern Tibet have decreed that hunters caught killing the musk deer will have their hands cut off and nailed to the temple doors According cury, also 11 to Dr. Joseph Rock explorer for the Na closed in the tube tional Geographic society, the animals are moves against the ends of the wires, there becoming very scarce, due to the per by closing the circuit and lighting the umers’ attempt to satisty the demands of bulb When the car ts started the me tashion his has led the lamas to re- cury regains its former position and tl rict ters Other animal substances light goes out \ U-shaped bend in sed in the manufacture of tube acts as a baffle, preventing the met perfumes are the precious ambereris, trom ‘ury trom operating the light when

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POPULAR MECHANICS 959 Gas Well Fires Put Out like Candle = entire apparatus, assembled near the scem : : he * 1s made “adv tor operation b y Smothering with Snuffer 7 ow 2 ee See peration t adding the extensions it needed and plac ishing the geysers of flame that ing the hood directly over the tlames b 1 natural-gas wells when they means ot block and tackle By proper dentally ignited g, sparks trom mes hitting the ish fires, or uses, is often suc- done by an on of the old ned snuffers our hers used to put 17 ] eir Candies, This but one of sev- Erecting the Big Steel-Hood Snuffer over Flaming Gas Well to Extinguish the Fire 1 inipulation “ane ( ) nv Ol t] e al ‘ according to t] e size of the ire the io is quickly shut off and the blaze smothered inside the 116 tal hood N ot ley ui wo 1) Oklahoma, this method was used to put out a fire and when the flame had sub emploved in combating the fire sided. it was found that the well produced O1 ich ina ten-year period de 1) OW) O00 cubie teet o ’ dat! roved five billion cubic feet ot vas and nually takes its toll in human lives and Glider in Air Nine Hours llions of dollars. The extinguisher con sts ot a metal hood mounted on wheels Sweeping about the skv in long, circ] nd terminating in a valve to which is at- “ficure eights” ina “flivver” airplane ched a piece of fourteen-inch pipe, about the motor and propeller sealed ieut enty teet long. This can be extended Thoret, a French aviator, broke all pre » any de sired length by screwing on more vious eliding re cord when he remaine a ints. On either side of the hood, mid up for nine hours and four minutes at the iv of its height, is a short piece of ten \lpilles field. At one point, he climbed to ch pipe also containing a valve. The an altitude of 4,000 feet.

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POPULAR MECHANICS Over the Mountains with White Coal Mile-Long Railway Trains Sped over Top of the Continent by the Harnessed Power of the Rivers of the Rockies By H. E. BYRAM President, Chicago, Milwaukee and St. Paul Railway AS the “Iron Horse” displaced the gine’s fuel and water was release = “Pony xpres . so the new “King other purposes. of the Rails’—the electric locomotive, In the days of steam operation o1 drawing its white coal from the trolley mountain divisions the average size wire suspended overhead has sounded trains was somewhat less than 1,600 the death knell of the steam railroad en- Today, with our motive power cut t gine wherever electricity is available. third, a mile-long freight train of 11! In a single year, on two divisions of with a total weight of 5,000 tons or bet our road alone, forty-four electrics dis- is not the exception but the rule placed 121 steam locomotives and moved the average of all trains, Jassel the transcontinental traffic at a cost for freight. work and locomotives t power of $672,000, as compared with the “light” over the road, is around 3.0 $1,400,000 it would have required for i len vears ago it was not uncon steam. The actuai saving was far greater see three steam locomotives toiling than even these figures indicate, as the hills toward the continental civide, cars that once hauled fuel from the mines ging the twelve or thirteen cars o to the locomotives were released for rev- westward-bound Olympian flyer. Al enue-paying service; the investment in labored a Pacific-type engine, one coal docks and water tanks waseliminated, monarchs of the road, and behind and that part of the motive power that was helpers assisted in pushing the 1,50 once used up in hauling around the en- train along at a fifteen-mile-an-hou:

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POPULAR MECHANICS VOL n Canyon Walls, High Cement 42,000,000,000 Gallons «

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POPULAR MECIITANICS oh "age —— = “==> > ee Part of the Dam and Spillway near Great Falls, Mont., Where the Missouri River Has Been Harnessed Provide Power for Running Raiiway Locomotives and Mining Machinery Today, the scene has changed. An elec tric locomotive purrs out of the east and pauses a moment at Three Forks, Mont., here the waters of the Jefferson, Madi- son and Gallatin rivers unite to form the Missouri, which winds its way 2 \"\ 2,501 miles to the Mississippi. Along its banks, the falling waters, stored behind enormous dams, are turning the turbines of many pow eF hou es, Cony erting the snows and the rain into that through the trolley wire above, the big electric locomotive. A brief pause, and the long train of brilliantly lighted cars slips away into the west as silently as it came. There i noise, no smoke: no spinning of mighty drivewheels ; bars nor backing to take up the slack. In the sleepers passengers are first aware that the train is under way when thev look up to find the station lights gliding past. Away on the flat up the Jefferson val- ley, the train gathers speed. Its electric locomotive, which has replaced the three engines of older davs, drones contentedly along. In the operator’s cab the indicator of the speedometer climbs higher power feeds, IS no no clanking of draw- single ‘meters forty miles, forty-five, fifty, sixty, and then sixty-five. There is a wor power vet uncalled for, but the e: in obedience to strict operating checks the train there. Che lights of Piedmont, thirty-four a half miles west of the headwaters Missouri, flash past, and the engineer « his throttle back, while the hum motors rises to the drone of a lazy the long climb to the roof of North A: ica begins. The grade shifts from o1 cent to one and one-half, then one seven-tenths, and finally which means a climb of 105 and six-te1 feet to the mile. The engineer chec] speed to twentv-five miles on the curves, with thirty-five on the stret and fortv up the straightaways. five or thirty-five or forty, it is same to the big electric with its inex ible supply of white coal feeding sile down from the wires above. On the instrument board, the an register a load of 200 amperes and the show a working power The bright, white light of Ver signal bores through the night track two per \ olts. block message OI a clear ahead ito

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POPULAR MECITIIANTCS eps i — teeth, We TT Where the River Actually Starts Its Service, the Big Power House at Great Falls, Sheltering Six G } 1its of 10,000 Kilowatts’ Capac ree and seven-tenths mile climb to Ced- motor c, 361 feet above. ity Ea armatures, huge drivewheels coming up, we which had t enerat.ng urned t! re t] C1 To the steady click of drivewheels on selves turned by the drivers and actuall teel rails another climb of 486 feet to began to manufacture electricity and re (;race slips by, four and nine-tenths miles turn it to the frolley wire overhead. Thi egotiated in ten minutes. Ahead looms also serves as a brake, and regulates the the crest of the divide, bathed in the final speed of the train. If a ten-car tra low of the sun, which set for folks be- starts down the mountain and a six-« rw some three hours before. A climb of train at the same moment starts up, t! 658 feet in a distance of only six and a down-l he othe uf miles, and the flyer glides into the up tunnel on the pass. Then the lights of railroad for the ound train would pull t hill without any expen power. The power e to the renerate sutte are in view and the train starts is not the only saving going downhil downgrade. The engineer does not touch Equally important is the absence of we is brake valve. Instead he shuts off the on brakes, wheels, rails, and on the cat power, pulls a lever, and then, apparently, The present electrical system e1 turns the power on again. two sections, one of 440 miles from Hat What he has actually done is start the lowton, Mont., to Avery, Idaho, and egenerative motors, one of the most re- other of 209 miles between Othello an markable inventions in all railroad historv. Tacoma, Wash. Included in those t When he shut off the power and puiled — stretches are our three main mountain « another switch lever he changed the en- visions, over the Rockies, Bitterroots tire character of the big motors which Cascades. As soon as possible the drove the train up the hill. By that act from Avery to Othello will be closed he passed a powerful current through the while power r-transmission lines are alread helds of the motors—overexcited them. available to extend the stem 1 the electricians say. As the train gained farther across the plains states west of t momentum down the mountainside, the Mi ippl brace 1 ]

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964 Some idea of the first cost may be gained from the amount of copper used in transmission We have 22,682,000 pounds of copper in the electrical system, an average of seventeen and four-tenths tons per mile. On our fifteen passenger, forty-two freight and four electric engines we have 1,872,000 pounds of copper, while the trolley wire alone weighs 14,892,000 pounds. The rest of the copper is used in substations, trans Phe rail- road does not manufacture any power, but buys its current from private corporations. wires and locomotives. entire formers and transmission wires Our electric motors are of three types— heavy-duty locomotives, the mo- di- freight lighter geared passenger engines on eastern section and bipolar geared gearless tors for passenger trains on the coast vision. The big freight engines—the giants of the road are 112 feet long, with a wheelbase of 102 feet eight inches. They are so big, in fact, that they are built up of two units, either one of which may. be operated independently. These engines have a speed of fifteen to twenty-five miles an hour, with their low-gear ratio, and de- velop 3,440 horsepower. They are pro- pelled by eight motors, turning their six- teen fifty-two inch drivewheels, and have a total weight of 576,000 pounds. The POPULAR MECHANICS geared passenger the mountain and Missoula divisions weight almost as great—566,780 | Besides the enormous weight of the gines, they carry 3,000 pounds of sar the track; 6,000 pounds motors on of oil, to ru hot-water heater which supplie coaches and sleeping cars, and pounds of water for the heater. The third, and newest type of e1 the bipolar gearless, in use on the looks more like its steam rival thar others, or rather like two steam e1 back to back. It has double cabs in the center and boiler-shaped opel ings at either end for the electrica chinery. The bipolars are also uw because of their gearless principl armatures of the motors being part drivewheel axles. With motors operating their twelve of t forty-four drivewheels they develop 3,500 power. These three types all use pantogr trolleys, while the trolley wire is made of copper strands wound about a core, the larger surface area of this carrving more current with less loss a single solid wire, while it is much flexible and less likely to break in winds or when loaded with ice and sl Contro's of an Eectric Motor. with Throttle at Left. Two Pressure Gauges for d Speed Recorder, and, at Right, Two the Air-Brake System Ammeters

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POPULAR MECHANICS Pair of Electric-Locomotive Wheels with Quill Spring Drive and Huge Gear = i "gts A Steel Rod | be Train Orders = the Mountains i he T uble Shooter's Car Above) H as Gas- Electri Drive and a Hydra Lift for the Working Platform; the I j owe Dispatcher | Right), with His Map } of 4,000 Miles of Lines, and a Light for Every | Switch, Sends the Cur- | rent Where It Is Needed

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966 POPULAR MECHANICS EVERY MOVE IN BALL GAME IS SHOWN ON SCRE@=:N ¥, ‘ ~~ Die CT >t" et AT BAT TN ms Play by play. be: Bec got, Eon hit the ball or s practically every ‘ eee 3. eet a out, run bas movement made in Stee: slide; see a baseball game at jt Ss ‘ pitcher “wind a distant park is re Gags ‘sh i and curve the produced _ with =e =. 4 and are able t realistic accuracy -. a) ee if the player on a_ thirty - foot ee -: ; right - handed screen for the en- i nouy “south paw.” jovment of theater yy ele. : umpire’s dec patrons with the = —~ a pem, oare announce aid of an ingenious i ‘ ae wees | Squares att electrical apparatus - sides, while invented by an t ground paint: eastern man. It is age , resemble virtually a motion a | crowds at picture machine we game adds without film or pro- [aag reality of th jector, the figures a The outfit being made to : of 19,000 move across the Copyright, Henry Miller Wire and en by 3 Sutees- Realistic Baseball Diamond on Screen, and behind tric : light sion of quic k | y Scenes Showing Network of Bulbs The invent flashing lights said to have which are wired to the telegraph instru- ten years in completing it and ments. Without the help of a vocal an- successfully installed in a theater nouncer, witnesses may watch the batter cording games played by the home ~ ¢

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POPULAR Is Grown by the Ton to Supply ‘rinkers throughout the World -N T \ ntioned in Chinese legends almost as ick as 3,000 years before Christ, tea ‘nturies has played an important part e social, political and commercial rv of the world, and today is one of :ost valuable articles of trade to cer countries. Approximately 100,000,000 nds are imported into the United St.tes alone while the total exports of the te.-producing nations are estimated at e than ten times that amount. Tea is the fourth most important product ie planters of the Dutch East Indies irding to reports of the Netherlands chamber of commerce, nearly 300 planta s there producing, in 1923, 106,260,000 nds, of which 4,443 tons were sent to the United States. Photo Revolver ‘“‘Shoots’’ Pictures at Pressure on Trigger Using cut or roll film, a compact cam- era that weighs less than a pound and can operated with one hand, has been made in France. It was designed especial- ly for the conven- ience of bicycle riders, autoists, police and others who wish to make “quick” pictures while “in action.” The operator aims through an auto- matic viewfinder, the exact size of the picture taken. The shutter is ressed by a trigger and the grip holds ufficient roll film for 100 exposures. The strument is provided with the ordinary stance and lens adjustments and enlarg g apparatus is furnished for the pictures, hich are about an inch square. Where Egg Yolks Get Color That the yolks of hens’ eggs are yellow ecause of the pigments in the foods the owls eat is shown by an exhibit prepared iv Prof. R. H. Plimmer of London at the Wembley exposition. So far as the hen erself is concerned, the professor finds, he volk would be pure white were it not or the pigment in leaves, vegetables, corn nd other colored grains consumed. MECHANICS 967 Air-Filter Mask Protects Painters from Lead Poisoning To protect painters from lead ing, a malady commonly suffered in theit profession especially when spraying im " ba | Painter Demonstrating a Lead-Poisoning Preventive, the Air-Filter Mask Connected to Spray Gun mask whicl mouth and nose and filters the air has been invented It is connected to the spray gun by a short length of rubber hose and as the painter works the trigger to spray the paint, the plements are used, a pletely covers the com movement sends a supply of fresh air to his nostrils through the hose and a moist filtering sponge in the mask. Pressure regulated and even feeding assured by needle valves. The mask is light. com pact and comfortable and is easily put o1 or removed. Tiny Compass Set in Ring Helps in Making Electrical Tests To save time and to prevent loss of the instrument, a small compass has been set ina finger ring. Worn bv electri alwavs convenient for determining the polarity o1 motors and gen erators and tor testing high-volt- age lit e ray elers in strange or uncharted areas may employ it to indicate direction instead ot the pocket varieties of the article he mounting is strongly made of polished metal, and the dial is protected by a heavy glass cover.

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POPULAR MECHANICS

969 aot ei =

Head of a Studio-Made Sphinx Being Raised into Position; the Section Weighs 1,500 Pounds and Completes a Five-Ton Figure Copied from Those Found among Ancient Ruins When the Movie Camera Won’t Lie Wizards of the Studios Aid Realism by Building Everything from Twelve-Ton Sphinxes to Lifelike Imitations of Flies ( yt all the strange sights to be seen in movieland, the property department one of the most wonderful. kinds hang from the ceilings and walls. lere, a tiny castle, complete in every de- tail; there, an assortment of ships rang ng from sections of ocean liners to sub- larines—each miniature made by a craits- lan expert in his line. To state that the wizards who manage these shops can make anything, is not so ery far out of the way. And when you onsider that daily orders from directors run from twelve-ton Sphinxes to hand ‘-arved house flies, you can realize why these men must be skilled in almost every trade and profession. One “prop” wizard has made mechani- cal ants, bees and other insects. Recently he was called upon to equip a huge live iligator with wings and tusks, thus con- verting it into a dragon. Again a replica of the electric chair was needed. With Toy s of all only a photograph as a gu duplicate was made in a few da time It wasn’t constructed of the same mate rials, of course, as the original but to the camera it registered exactly the same However, many of the articles ce manded must be practical to a degree. Cannon, for instance, are that they can be fired An oil gushet needed, so the | rick on the outs! ( pipe ran from the bottom of the derricl yrop” man erecte la aet <irts of the town set. toa spot out ide the camera. V1IS1O1 \ fire engine was hitched to the pipe li and at the signal, water which had pr: viously been colored black so that 1f ou a photograph like oil, was pumped throug! the pipe with considerable effect was that of an actual oil gusher The plaster shop is another department which employs men at the top of trade. In making imitation marble a spe cial cement is used, and force | 1 petore it et

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POPULAR MECHANICS all er | (tTG7 bhi Pilih esl Painters in a Movie Property R Decorating Part of 250 Egy} tian Char iots Constructed in the Ste idio Shop for | a Recent Biblical Spectacle; Left, Screen | Star Inspecting a Replica of an Egyptiar Mummy Made Solely for Use in a Mu- seum Sce ne of a Large Production, and } Bel Group of “Prop’’ Oxcarts Pat iH | po after Those That Carried Many HH] of the ee eee el fr x gy Bay | 1 “joo, di id Wh Di : Service duri! a 1 Pi ture 0 tr iyal of That E\,

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POPULAR MECHANICS ——

- ;. ~ be f

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POPULAR MECHANICS Where the Art of Unseen Property Crew Reproduces the Wonders of a Buried Age; Lower Portions of Thirty-Foot Plaster Figures Compared in Size with One of the Players

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=) iH eS a > ad POPULAR MECHANICS 973 ense Plaster thday Cake into Which Edible Portions Were Inserted reads dyed various colors are drawn suugh it. This leaves the characteristic rble texture. When a piece of this Iposition stone is broken the colors n be seen through the entire thickness. ons of gypsum and bales of fiber are con- med every month. Statuary that would st thousands of dollars if purchased by e piece is molded every day. \s photoplays must not lie, research epartments devote much time to the dig- ° Ine of the Familiar ye 2 Chests That Con- is Raw Materials from hich Many of the Smaller Stage Pieces Are Formed ging up of necessary data wl make pictures true, faithful revelations of the actual life of the characters whic] them and a correct representation ot the locales of the stories. Although the property department may receive orders tor furniture of an ancient medieval or modern period to decorate ] set, the work does not begin until the re ! 1 7 ‘ search expert lave supp ed photograp! or desct Iptiol mt HIE

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POPULAR MECHANICS Folding Rear Windshield for Auto e¢ Gives Touring Comfort wey he l rid- adjusted rts that frequently atten aep rare said ata } eas)l l \ lected irom t] that do not rise sink co Gauge with Handle and Lock Clamp Simplifies Measuring Holes Most or tne difficultie encounters mining the inside diameters ot vlinder blocks and other machine > eliminated with the use of-an im rometer consisting of a he lf-inch measur- BcrTrTew, SIX ‘ ea fh» ods and a spacing ‘ollar now being rt ; e inufacture seful When Extended, Rear-Seat Wind- ld Is Open-Car Comfort -iOYN ir the imped to the ‘Id rigidly in shaped, to is durable . | 7 IS Claimed. Strange Craft Cuts River Weeds at Depth of Seven Feet rTONV in the and england, care- them for wear he handle plug is | not mar or injure the taken. 1 out their submarine made of machine, a motorboat Sickles in Forwar Motorboat Mowing Machine Fitted with That Can Be Lowered to Depth of Seven Feet

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mp POPULAR MECIIANICS r 1 against the Sky in Points of Dazzling Lights, Ships of the British Fleet Are Bathed in I Splendor for a Night Review at Naval Pageant British Fleet Outlined in Lights — minutes, heat a curling iro in First Pageant Since War gg most brilliant naval spectacle since churn 440 pounds of butter. t betore the war was taged e king reviewed the British grand Wallpaper Finish for Auto Bodies e vessels had been specially dex Saves Task of Painting 1 streams of pennants b lay of electrics bv night, the lights Doing awa vit the | masts and rigging 1 1 t required to covet ot fire. The review marked tot textile 1 rial t t « ot the great naval pag rated ey Pag ge ; 1914 ( Many Tasks Done at Trifling Cost ed, flowered o1 yy Small Amount of Electricity > mate small sum of money cat rie ed” to electricit’ is \\' ¢ \ | WT ] | ‘ ted b 1 recent re- € LaSKS wasp mn ae ae yrmed é yur of P P ly cou I Costs ten ceé S yr les and experiment vered that the unit ower will drive a sew- machine tor twenty >| iteen steel es for one vear, ive horses or twenty, heep heat water for ng tor one month, t three cigars a day Ive ( eat a flat ) eC ITS, boll . Onl ) ite | »ps in fifteen

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POPULAR MECHANICS

the Sunshine ansion oT Black Glass

At Left, an Ob- server Is Sending Up Balloon Loaded with Re- cording Instru- ments That Will Show Velocity and Direction of Wind at Various Altitudes; Right Inflating and Measuring a Weather Bal- loon

Calculating Wind's locity and Direction « Recording Device C<« nected with Instrument on Top of Building 2( Feet above Street Leve These Data, Minutes Sunshine Each Day Rainfall Are Shown or Revolving Chart; to tl Left Is Barometer Whic Records Air Pressure « a Card That Revolv« Once in Twenty- ‘our ours

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POPULAR MECHANICS ee - 4 _ me at = | vt Examining Chart Which Shows Direction of the Winds at Various Altitude luring Prepara Aviation Weather Forecasts Now Being Made for Every Part of the Country Making the Air Safe for Fliers Uncle Sam’s Charts of the Upper Atmosphere Enable Aviators to Avoid Storms by Flying Over or Around Them el e iw i h t ot \ 14) ( i ) ‘ d cold © busine orta e é (Hw) 1 1 clue ) ¢ f ( ‘ here trat ¢ compa ind on the suriace and at box kites be 900. 1.000. 1.500. 2.000. 3.000 and 4.000 ret the . tel On one day recently the chart iriou ltitucde Nit im ~ d, for exat iple a gentle north wind t Broken Arro {) Drexe veb ng tour 1 les an hour it M idison Due West, S. ¢ ; belle dale, N 1) tro : For tl tller going south, toward beck, Tex., Royal Center, Ind Louis or Memphis, Tenn., that would or balloons twice ad at Bur ; iT favorable breeze, since he would Denver, Colo It ru, N \ Ke Ve it behind his back, to help push the Kla., Lansit M i mn, MV e along Juan, Porto Rico, Wa ton, LD. ¢ But go up to 1,000 meters— favorite Scott Field, | x altitude—and instead of that gentle The readings ot the recor mile breeze out of the north there is ment ire telegraphed : twent mile wind out of shghtly (Chicago and Sa rane ) J th of east, ready to send a south-bound ogical map 1 e dritting tar out of its course. unless tor tourtee el ide 10 pa vt hie ( tse itio }

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978 POPULAR MECHANICS As soon as a telegram arrives, it is rushed a velocity of thirteen miles an to the forecaster, who decodes it and “feeble” shows that at 1,000 met draws in the directional arrows and marks shifted to north of east and d: the velocity on the sheet of aerological nine miles. The next word, “n maps, one map for the surface and each a complete boxing of the com, altitude given. the wind circling around to we i \ sample code telegram from the ob- west, but keeping the same v: erver at Drexel, Nebr., on a recent date nine miles an hour, at an altitud: aid: “DREXEL HOPBACK FACETY meters. At 2,000 meters, “rovi: FOLEY FIXING FEEBLE NILES | a shift to west-northwest, with ROVING SABER SEABORNE TU- of thirteen miles again. From MULOUS SADDUCER CIRRUM SEV- a gale began to appear. At 3,00 EN.” Decoded, “Drexel” and “hopback” “saber” indicates a north-northwe vive the place and date and each of the’ blowing thirty-one miles an hou next eight words the velocity and direction “seaborne” shows a forty-mile ¢ of the wind on the surface and at 250, 500, the same direction at 4,000 mete 1.000, 1.500, 2,000, 3,000 and 4,000 meters. sides the captive balloons and kite lhe word “tumulous” shows the carry instruments aloft, th« kite reached an extreme altitude sc gilli er bureau also uses smal of 5.000 meters—1.000 above the ied loons to show the direct highest shown on the usual maps & ui wind at various altitud: and “sadducer” means that it “a height of the clouds. encour tered a forty - four mile i eter of the balloons is northwest wind blowing there, measured as they are while “cirrum” means there were a ) their lifting power weig! ) } ~w cumulus clouds in the west, cate scales. Delicate rec: ind “seven” gives the visibility in struments also keep miles. The wind conditions at check on the wind vel Drexel on this day were unusual. direction at the surface, a1 “Facety” means an eleven - mile sunshine and rain. and east wind was blowing on the sur- | sure of the atmosphere. \\ face, while at 250 meters “foley” weather bureau announce shows it had shifted to slightly many hours and minutes south of east without changing its shine have been recorded velocity. At 500 meters “fixing” the day, it is only giving indicated the same direction, but | facts which have been au cally marked down by on most delicate of its apy Copyrig! l lerwood «& Observers at Washington About to Release a Scout Balloon to Determine Direction and How Fa Blows as Forecast Data for Guidance of Fliers throughout the Country

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In POPULAR MECHANICS idred Revol utions of the Cups on This Instru- dicate That a Are ht the Is ‘Mile of Wind” Has Passed; the Registered on Time Dial Showing Velocity; Being Measured before the Ascent Lifting Power of an Observation Balloon Measuring the Water and 4 Flow of an Airplan gine in n Alttad Che, nber Whi h Du plic ates Some of the Actual Flying Conditi ms at Different Heights, to Determine How the Motor Withstands Cold and Density at Varying Levels and to Dete: Faults; Controls re Seen Right oU. &U

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980 Vanishing Furniture Fixed on Door Doubles the Use of Rooms Single rooms can be made to serve the purposes of two with a cleverly designed revolving-door arrangement which has a folding bed on one and a writing table, desk or sideboard on the other. On the back, it opens into a convenient stor- age closet or dressing room where the side not wanted is concealed. Unlike most folding beds, this one has standard-shaped ends and when let told side down, cannot be POPULAR MECHANICS from one of ordinary pattern, t] ing a common objection to fold ture. The t door is attractively | may be finished in any style t other decorations, is securely p can be turned with little effort apartments and hotels furnished equipment need fewer rooms, t} tages of the ‘ ‘best” room in the | be enjoyed both by day and night arrangement space ] oor Bed and Sideboard Exposed and Door Swung Part Way Around to Show Storage and and effects a great s reduces constructi lurniture swing clear carpet, opening and easily and without Steel Walls to Stop Locusts Thirty-nine thous of galvanized steel sh« to be used to ravages of locusts in Argentina. A $5,000.01 tract for the material signed with an Amer Digging pitfalls, spray ground in which the « deposited with chemi destroying the egg « other ways that have ployed in fighting t! stop

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POPULAR MECHANICS CUSTS 0olhouse Rides on Canal Bars en-Mile Voyage \ for Sevente Auto’s Lights Turned Up or Down by Knob on Steering Wheel wer of Two Handfuls of Coal Enough to Last Family a Day | 1 ipparatus | rh point ot eth supply the whole d in be ike ta < \ ayv ¢ tral power stations uls of coal, engineer tor a large accordtt any. He Asserts that mprovements made that now itors 35.000 20.000 to net ot furnishing every pound of coal burned these big turbines are bei

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982 POPULAR Brush Handle Fits Hose and Sprays Water for Washing Auto With a long hollow handle t vrardaen ho al be attac holde T which a brush vater from a nozzle is ned a Brush Holder and Spray Which Gets Water Supply through Hollow Handle Attached to Garden Hose being made for washing automobiles, walls, windows and other large surfaces. The brushes are removable so that either soft or stiff bristles can be fastened to the device. The spray is arranged to aid in dislodging dirt, and the water may be turned on with almost any degree of force needed. The great length of the holder enables the user to keep a sufficient dis- tance from the work to avoid being splashed while manipulating the brush. Expanding Cuff Links Save Trouble in Rolling Up Sleeves Inconvenience of having to remove the cuff links or unfasten them before rolling up the _ sleeves, been elimi- nated by an ex- panding link now on the market. The two sides are held together by a series of coil springs which stretch sufficient- ly to allow the pushed a considerable dis- tance up the arm without having to un- fasten the cuffs or take off the coat. The links are easily inserted and are attractive. has -OURNID:: j sleeve to be MECHANICS Fortune in Diamonds Found on Farm atl Bought for One Hundred Dollar tal diamo1 soil on a farm near Zeekoefontei Vaal river in South Africa, pre a rush of nearly 3,000 persons, experienced diggers, students, cl even girls, when the government the surrounding territory to “cl gers.” Holders of licenses mitted them to file on the land a line behind the mining and a squad of mounted police. nal, they rushed forward down a | had been cleared to the site of the and hastily drove their pegs. The had obtained the land for less 1 and it yielded him over $10,000 The largest diamond he had di weighed thirty-four and one-eight Chance discovery ot 1 com! Revolving Sign Covers Water Tank and Advertises Theater Space on an exposed water tan] effectively used by a mid-we owner for an advertising device to tention to the building by day and night and to announce various attractions. A steel wire frame, which will be turned by an elec- tric motor. and self - winding clockwork, will entirely surround the tank and re- volve around it, bearing in large letters the name of the theater and such other legends as may be played from time to time. Power- ful searchlights will be mounted on the frame and turn with it. The lofty position of the tank suits it to advertising purposes and the fra: as an attractive shield to covet and somewhat unsightly proport dis- @ Between 7,000 and 8,000 d drowning are recorded every yea United States.

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POPULAR MECHANICS e Moments during Yacht Race with the Crew Crouching on Deck to Avoid the Swing of the Boom as the Craft Comes About on the Turn in a High Wind Yacht Modeling Teaches Seamanship Construction and Sailing of Miniature Craft Train Scholars for Contests of Skill with Tools and Boats b an effort to convert youthful land- an organization of yachtsmen who are ubbers into potential seamen with a giving assistance to schoolboys and other owledge of the duties and requirements interested in the building of models as a thoroughly trained sailor, a model- pastime, or who have taken up the practice ht club of Washington, D. C., is in- as an aid to the study of marine architec tructing the boys of that community in ture and construction. Experts in the art e building of toy boats and aiding them of model building assist the craftsmen b he proper sailing of the miniature craft. suggestions regarding tools required and When laying out and constructing the methods of doing the cutting and carving dels, great attention is paid to the de- of the hulls, masts and tiny beams. When of keels, buoyancy and minimum re- the modelers are ready to try out the boat tance to water. Sails are cut and fitted instruction is given them in the handlin: ording to the rules that apply to large of sails,, which must be set so they wil it. Efforts are also made to gain speed carry the vessels along the courses with the toy vessels by experimenting with out causing them to capsize’ or change inges in the forming of hulls, and when’ direction of travel from the line desired. nched in a pond or tank, the boats’ per- Pupils have been recruited from the rmances are studied so that any new’ ranks of both old and young model en- tures that might disclose: themselves thusiasts. Classes are regularly held for e the model is afloat can be corrected instruction in management of sailing boat enlarged upon in order to produce the by those through whose efforts building itest degree of ability when the de- of model yachts has been introduced into er finally completes the miniature and the schools, for the purpose of giving the mits it to the instructors or judges for students interested in carpentry and wood- pection. Much has been done also by working a knowledge of lumber and tools

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POPULAR MECHANICS Fleet ’ ‘ Wind Th Propels Ther wo Yacht Contesting f the Lead dur ing a Race Internationa Interest Wher: Superiority Depends or the “Cut” the Trim Craft Gracefully Wrought Hull of Toy Yacht Produced by F ipl of the Boat Mode!ing Class

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POPULAR MECHANICS ed to the design and construction models, poplar, because of equall crait. Manual-training classes able qualities, is substituted when } he same svstematic instruction in naterial cannot be readily pro ng of toy sailboats as those taught is said, after the bovs hav ing and similar trades a course in the planning e knowledge of boat a tov model of a vacht, it is eas! vet at the hands of them the art of sailing large rs, spare time in home work-_ the reason that fitting and | devoted to the craft. Fairly large sails, important duties of a crew can be completed in this way in so the miniatures can be entered to four months. Instead of tests held in lagoons of two or three patterns or copying the work of the city’s public parks. These tour odelers, the students are given ments are arranged by the ts from which to construct their of yachtsmen and those els. These are prepared bya naval .- practice of modeling as a ct who provides the youthful crafts- ness. Prizes for workmanship and a th a full set of dimensions, which to provide speed through the arrangement instruction and practice in the of sails are offered in addition to trophic of plans. for the winners of races. An average « general pattern for the teaching of fifteen to twenty models are always under the architect drew up a design construction in the ordinary manual-trai1 s the outline of only one-half of ing class. The first attempts are al t, and this is divided into sections made with simple designs of smal ‘ + in the progressive steps of the un- but with progress on the pa including the sail plan for the scholars, larger and more difficult mit From start to finish, each part tures are submitted to them for constru e work is inspected by instructors tion. Frequently groups of youthi emphasize the importance of curves “fans” undertake the making of models es in the hulls. Although white gether, resulting i1 ke vor] referable use in the boat often superior a Truing Up the F= i T i) Shaping Wood to Keel to Give the SS } Assembled / Sections Tiny Model Bal- Hull Ready Form’ Graceful! ance When for Mast 5 Body of Toy Afloat } Bow and Yacht Rigging

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986 POPULAR MECHANICS Lever Release in Launching Lifeboat cent, or about 15,000 of this number Increases Safety at Sea heir sight because of industrial ac / according to a report recently mM emergenci c the Intern itional Association ot indu it { l , s beards and cCOmMmMItssions means i, nrev, t iHCa I pre these casualties. the sociation oftered fold code, stre cation, better eye tests glasses, prompt ficient medical and protection eyes with goggles. 1 fourths of the e juries suffered by were declared from prevental while fifteen | industrial a said to re proper alone. Gi pecially rec chippin riveting, quart Special Airplane Compass Guides Fliers When Landmarks Fade d for centuries to guide e mariner’s ] 1 poorly adapt ( fouled them, pré trom the catches have een construct { stand a load ot 30,000 pounds, the equip ment may be installed on large or small ships and works successfully whether the same princip vessel is moving or still. Similar catches, which may be instantlv released, are used for fastening the lifeboats to the decks has been invented. It cor in part, of an armature which 1s steadily revolving on a vertical sha ] a dy namo ++ a meter on the instrument boat Fifteen Thousand Persons Blinded he pilot. The brushes of the ar by Industrial Accidents re set in the direction the airplane Any change from this cours There are approximately 110,000 bling an electrical current that indicates the United States and 13.5 per viation on the meter dial

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POPULAR MECHANICS lboard Made of Mixed Minerals Ancient Treasure Chest Is Found ; Proof against Fire and Cold in Wrecking Old Building ed to be able to resist fire and Resembling an immense pit changes of temperature to a re rusted iron safe, about 120 e degree, a patented wallboard for found in the cellar of o1 e outside of buildings of all kinds manufactured in California. It ilf an inch thick and is composed <ture of minerals so combined as luce a material that effectively in- against heat and cold. Ina chem- tory fire, not long ago, it sustained ls until the entire inside of the had been destroy ed. llage Laid Out in Shape of Bell to Assure Light and Air its shape a community nea eld, is known as the “Liberty llage.”” The roads winding through ea describe the outlines of a bell and : : : — laced i ES line Century-Old lron Safe, Studded with Rivets, That Was vellingsS are placed in Corresponding found in Wrecking Landmark ons. The center of the plan is al- ly clear of buildings, while a buildings in Brattleboro, Vt., when it oval traced by the highway ap wrecked recently. Exclusive of the legs, to be the hanging link for the top it measured two feet four inches square and e design. The town is of modern was made of thin and narrow strip truction, and each residence is pro- fastened together with rivets, the Wi ! entire size ol Markings inside dis lentiful sunlight and = closed that it was built in Providence. R. | ich air as possible. about 1805. The -kevholes in both the vith a wide plot of ground to in- those used in boilers to the homes pl outer and inner doors in- dicate that a usual size w: Oil Burners Cause Cinder Shortage Due in part to the great increase in oil burners, a cinder short- age occurred in New York recently, tempo- rarily halting building operations in which mil- lions of dollars had been invested until a regular supply of the material which is used extensively in fireproofing, could be obtained. A breakdown in the facilities of a cart age company that handles most of the citv’s ashe was partly to blame tor the “famine,” | revealed that Uberte Goria substitutior ‘onal h; ‘ ‘rially plane View of “Liberty Bell Village,’ Showing the Design Traced by for coal had mate : Roads and Streets hich Permits Plenty of Space for Homes depleted the supply

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Time and Money-Saving Tools g Closely against V tt in Use, a Collapsible S g Stand Has Holders 2 Hook for Brush and Whiskbroom, and Rag Tr! Works on Rollers Below, Handy Electric Double Boiler Is Also Suitable for Serv ving Foods No Danger of Getting 4 . . With Fluid Held in T Salt in the Ice Cream ; 7 é ee || Compartment and R with This Rapid Labor- | q Si leased by Pressure Saving Freezer That | Valve, This Stror Stops Automatically ‘ Bristled Brush Th When Contents Are a ee ‘ es oughly Cleans Clot! Ready iI ——— Bc, . es at Home ~Qb

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Woman’s Workshop in Home , : — r ——- «t )_AnE Y 4 er Cleaning Furni- Dressing Tabie re, Curtains, Walls. 2 and Benwers, tomobil d Al- | an orage Space ot hase Poss of the j ts for Linen and Other House, This Novel | : m% | Articles, Are Com- Portable Vacuum ’ ; bined in Handsome, Cleaner That Con- : Sanitary Cabinet for ects to a Light Sock- r the Bathroom t Is Practical and Effective Little Folks Have Fun and Healthful Exercise with a Small Seesaw with Strong Seat and Springs at One End That One Child Operates with Handle; Below Is Can Opener That Cuts Round: Holes of Various Sizes in Square or Cylindrical Cans Gripped , —" Rubber — Slippery Milk Bottles Collapsible Holder, ss of Any Size Are Carried Glasses on Trains, Y , as Easily as Pails with Automobiles or Ships J - 2 This Simple Collar-and Are Kept from Rattling | 4 : ‘ Chain Arrangement or and Breaking | - ; } the Bottle Neck a it by addressi1 g Bureau of Information, Popular Me

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90 POPULAR MECHANICS Auto Motor Heat Shown by Meter Thirty Thousand Acres of Trees A; on the Instrument Board Needed Yearly for Toothpicks \pproximately 30,000 acres of trees necessary for the manufacture of toothpicks used yearly in the Unit States alone, according to governn estimates. Maple and hickory are chief kinds of wood used, although swe and yellow birch are employed in so localities \fter being felled, the logs i sawed into bolts, twenty eight inches lo: se are then steamed and cut int of veneer or thin sticks wl divided into ribbons, three inch: vide kight or ten of these through machines that clip the splinters of regulation toothpick hape, and they are then boxed, e net holding about 1,500 Motor Thermcmeter on Board, and Inset Showing controler ne, Ohio and Oregon are ( ‘ted “ahr connected : sources of the supply. ittached to the ‘hn hand teas | Tiny Stone Slab Was Butcher Bill Forty Centuries Ago ; i are said to be llest books in the w Ly iversit ] 3] Numbering Machine Stamps Serial Figures by Hand ique “‘Books,”” One of Which Was W Four Thousand Years Ago One is a stone tablet, about ilf inches square. It tl 0 B. C. and contair I the spot wv le > ota butcher's bill for three 1 impression is being de by a special plate to the temple of one on the bottom Constructed : . kings. The other is 1 1 I 2e the res he de 233 throughout and w fi ; is a more imposing ' iardened too 1 withstand the hardest usage ‘lo 1 er than tl sely type d pages.

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POPULAR MECHANICS Tipple Emptying a Narrow-Gauge Coal Car into a Large Gondola; Above, Unloader Returning Its Burden to the Road Level; Left, Beginning Roll Back to Normal Position he distance the cars Tipple Turns Coal Cars Over, load, depending on t have to travel along the storage tracks Emptying Twenty an Hour It estimated that 160 cars can be emp transfer coal, lime rock, ore and tied in an eight-hour day as compared bulky materials from narrow- with three under the shovel system for to standard-built railroad cars, a merly used, and they can be returned in tipple at Salida, Colo., turns the much less time to active service without carriers upside down over the’ the usual delay in the transfer and un ones. The device, which consists of loading yard. shaped iron “cradle,* makes a olution, permitting its burden to Carriage Wheels as Window Frames the contents in a few seconds. Reduce Cost of Building i. hopper is to be emptied, it is run = track in the bottom of the tipple Utilizing discarded carriage wheels for rolls up a short incline as the op window frames in a Massachusetts fac starts the machinery. Heavy tory is claimed to bring the contrivance back to have resulted in a position. Cars of different widths saving to the own indled, since a side-slip arrange ‘rs in the cost ot 1 the track allows any type of gon *structure. The ) rest against the guides as it begins heavy spokes are over. Steel beams that grip and said to give added he car while it is being rotated protection to the iutomatically with its movement panes without ob- electric power, the unloader is at structing the pas- by only three men, and it is said sage of light and single operator could manipulate’ air. Obtained at tructure in emergency Only three practically no expense, the wheels e€ minutes are consumed for each odd appearance to the building.

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992 POPULAR Coin-in-Slot Machine Sells Combs That Carry Advertising Asan aid to busy patrons a penny-in- the-slot vending machine is made to sell Penny-in-Slot Vending Machine Which Delivers Comb When Penny Is Dropped in Opening combs in public places. Suitable to install in hotels, railroad stations, theaters and similar gathering points, the device will hold a large supply of the articles. Space is provided at the sides of the combs for the printing of advertising matter or other inscriptions. Small enough to be carried pocket or purse, conveniently in the combs can serve for repeated use. Grease-Filled Auto Shackle-Bolt Nut Eliminates Squeaky Springs s, planned to tling springs Automobile shackle-bolt nut t eliminate squeaking and ra and to make trequent tightening unneces are being manufactured by mid-western company. They consist of two cup-shaped mem- | telescoping into each other and ineclosing a hea VV coiled spring, and a nut that fits over the shackle bolt. Be- fore applying, the cups are filled with grease which serves to eliminate noise. By SaTVy, ait8 * MECHANICS screwing up the nut, tension is pla the spring so that the nut cannot thus preventing the assemb rattling. The attachments are eas on, and have nickeled surfaces to the appearance of the car. | loose, Traffic Light Gives Fire Alarm and Tells Engines’ Route Combining both a traffic signal alarm to warn pedestrians and vehi the direction approaching fire ap will take, a device for which patent been asked, can be operated by a pu ton at the fire station or by a patr on the street. As the summons i fire-fighting crews reach the fire hou attendant takes over control of the s by means of a switch. Alarms at afi street intersections may then be | action, and colored lights started s at the corners. At the same tit gongs attached to the signals call tion tothem. The appliance is als as a fire alarm only. Traffic Fire Alarm in Operation at Street Showing Direction Apparatus Is Trav @ When you want anything and know where to get it, write Burea formation, Popular Mechanics, '

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POPULAR MECHANICS asting a “‘Struggle in the Forest’’; Microphone on the Floor Transmits Sounds of Trampled Paper as Rustling of Dead Leaves, and the Striking of Sticks Supplies Beats of Horses’ Hoofs From Stage Thrills to Radio Drama Behind the Scenes in Studio Where Weird Devices Give Realistic Effects for Unseen Listeners \ SHOT rang out on the still night air, ‘ s the old-time fiction writers used to their stories. A farmer’s family in ne; a banker in his library in a middle- ern city, and a group of cowpunchers bunk house in Texas listened breath- for the sound was carried by wire- Untold thousands of radio fans red from the Atlantic to the Pacific om the Canadian border to the Gulf heard it, too, for all of them » tuned in on the drama “Pierre of the ’ broadcast from an eastern city. e old-time thriller of the past, that hed its glory when the box office hung ne pis (ee -standing room have had as twelve LeXICO sign May many as breathlessly on ed people hanging s lines, but nowadays when a put on the air its invisible € may run into the millions. hear the shot and the heroine's hey listen to the galloping hoof of the villain’s horse as he rama 18 speeds of the wounded hero stagget away; the gasps drags himself to his feet and his own mount; and the rat-a-tat-tat flying feet as the animal takes up th pursuit. And they hear the fight of her and villain among the rustling leaves o1 the forest. Equipping a sound-producing regular stage-property man Everything from a character's entrance radio-drama outfit wit! would drive to desperatior devices + his exit must be interpreted in a way whic will actuate a microphone and = cart through the air The old producer o ‘Alaska,” “Billy the Kid,” “Call of tl North,” “East Lynne,” “For Her Sake “Her First False Step,” “Nettie the New rl,’ “Ten Nights ina Barroom” or the which still are to be other melodramas seen in the had an easy time compared to the moder smaller towns and village radio dramatist Think ot the dithculty ot opening

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POPULAR MECHANICS

In Putting Sound of Dra- matic Action in- ni to Radio Play, the Director Manipulates Noise - Produc- f H E ing Implements W hile Characters Follow His Sig- nals with Their Lines; Left, Fa- ‘miliar Type of Theatrical Post- er Procured from uM “ Paunee Stocks Always on Hand in Printeries That Produce ‘“Pa- per’ for More Popular Melo- Tamas

taseart AEP UOT Pore AR THEATER OF Cine lagen He Pome - Let Upesitr nt OvmGieet< Acre tire —e idly Being ‘ ated to Smalik Pceenpaittes Movies Radi

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POPULAR MECHANICS ~ — — SS sail ») Dramatists Reading ines of an Absorbing Scene into ir of Microphones Provided to Insure Perfect Transmission 1 a -_ CASE TWRSEPH Kinc’s new version ; a ster of a Play That Is Still in De- and by Theatergoers Whose Faith- Preference for the Old Standards Demonstrated by Box-Office Re- : Unseen Struggle in the ts; Insert, Well-Known Stage Star : Broadcasting Room Action before a Microphone Which Helps the Actors in Reading Their Lines

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POPULAR MECHANICS Casting a Radio Play wit irector and Actor repar ing for First Story That May F lion Hearers: Left Scene That Can Be Wire'essed wit the Aid of Noises In Position before a Pair of Micro- phones Awaiting Cue to Begin

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POPULAR MECHANICS During Tense Situation in Studio While Thrilling Words of Play Are Being Emphasized by Property Man, Whose Important Duty Is to Follow Action of Piece with Realistic Sounds; Below, How Amusement-Seeking Pub- lic Was Attracted to } Wonders of Museum of Long Ago ———

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POPULAR MECHANICS li t nd will not chime and a tap bell complete the arry through the air that is full of But getting back to Pierre, in the rket reports, static, bedtime stories, “Pierre of the Plains.” The shot 1ologists, darky quartets, pianists, out on the still night air and Pierre xophonists, lecturers on how to make _ feigning death among the leave iwberry pie, speakers on Europe’s property revolver in the hands of the: problems, jazz bands, brass bands, orches- director fired the shot, and a | ras, and not only carry through all that, crumpled onion-skin paper on th: still sound like a door opening or clos- provides the rustling leaves. Beside g¢ when it is received. paper is a big microphone which \t the WGY studio, Schenectady, N. Y... the sound across the continent. here eighty-five plays were reproduced At the approach of the villain, wl and broadcast in eighteen months, that lieves he has killed the hero, problem of the entrance and exit of a grapples with him and they str character was solved by building a special among the rustling paper. Pierre is rtable door and door frame. The door’ of course, and the winner finally 1 ‘onstructed of thin oak and has a pe- his horse and rides away. A young resonant quality which makes its perched on the grand piano, ling and closing rea il recognizable will be out of the way of the acti i door by the soun kewise the lock the floor, sup plies the sound of has a highly gifted click, ene ah transmits hoofs by clapping two sticks toget! ll through the ether. A re volving-barrel thunder Jext to the door, which heralds the produces thunder just as on the and departure of every character Tin pans, a wire carpet beater, dish in an indoor set, the most overworked other homely devices are used to sit property device is the bell board. It con- other sounds. Frequently consid ists of a convenient arrangement of five experimenting must be done to find yells of different ti nes and a buzzer, with vice that will sound right over th: the necessary dry c ind | buttons. There There is plenty of action in mat a doorbell, telephone bell and an alarm lavs, despite the fact that the cl sounded for fire, are reading their parts from the 1 vula ince or as a burglar alarm. A clock vhich must appeal to the ear. Simple Means Are Employed to Imitate the Various Natural Sounds Necessary in the Production of a I for the Radio; the Kiss Produced for Broadcasting and as Seen on the Stage

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OX | ME Fie | The Mysterious Submarine By F. D. BURKE nteresting little toy described in ticle will, when placed in water, ‘ally dive and come to the sur . repeating this performance, on ve, once a minute over a long peri- It not only makes a very good soy but can be used also for ad purposes. Placed ina glass tank played in a show window, its ac- } tions will attract the attention and interest of passers-by, who will stop to wonder how it operates. The hull consists of an 8-in. length of 20-gauge brass tubing, 2 in. in diameter The ends of the tubes are fitted with two water-tight wooden plugs, so shaped as to give the hull the characteristic cigar shape. hese plugs are made hollow, as shown. The operation of carving out the inside of the plugs, however, should not be com- pleted until the hull has been tested for balance. When properly balanced, tl hull should sink in a perfectly horizontal 1e Submarines That Will Submerge and Rise to the Surface Automatically Can Easily Be Made by Any Boy. They Are Also Useful as Attractions for the Store Window

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POPULAR position Attached to the plug that forms the tern are two vertical fins, cut trom vel rht tin and attached bv means of No. 20 nals, in. long. The conning tower 1s cut Irom a solid block ol wood. I t stened to Lull by i . ‘ ad "” eans of smal al b1 t les | i - 7~ 8” H \ MY) nail ig WATER INLET - - ' a\ om + in. lo a2 ' ; ¢ ; ¢ | length of %4- : BRACE 3 | pond or in dowel 1 CARBIDE CONTAINER ~ ~ water hinged to the : ‘ mediatel oe , . Const t yf the Submarine, with Details of the Automatic } : after side of Airc Waive to flow i1 the conning hull tl tower bv two ire st iples. At the point the bottom opening, and the subi indicated in the drawing a M%e-in. hole is will slowly sink. When it is fu drilled in the tube of the hull. Through merged the automatic air valve this hole projects a heavy brass pin, under The water will then slowly seep int the head of which is a ™%-in. square cut carbide container and form acetyle: from a heavy rubber band. The other end of the pin is bent to form an eye, and Is attached to the dowel by another small staple. The action of this part of the mechanism is as follows: When the sub- marine is submerged, the dowel acts as a float and pulls the rubber against the hole in the tube, closing it; rine is on when the subma- the surface the dowel acts as a weight and drops, thus opening the hole alt to the Another ¢6-in. hole is drilled in the bottom of the hull to allow water to flo in and out Glucose for Anti-Freezing Solution conducted ot agent, 1 Was the anti-freeze solution ot one to determine glucose as an found that a and four parts water became wet F., stiff at 15 hard at solution of one glucose parts water the same results. It is rotary pump on any car damaged by the use ot solutions if exposed to temperatures of 15 to 10° F. On the other hand, glu s discovered to be a food substi- part glucose lushv hke snow at 20 1O° F. A part of and five of gave practically evident that the can be seriously ] such cose wa tute t& ture 1 glveerin ina glvcerin-alcohol mix One part ol glucose, one part of MECHANICS ee 4 SQ. PERISCOPE -CONNING TOWER / RE by remo H 7g K2 DOWEL _3" ~| one ot the lo operate the toy, a small l-oz. ca flat shape, such as can be obtained any drug store, is filled with carb pinhole having previously been drill punched in the cover. The loaded placed 11 hull in tl sition plugs, an station 8 j / ASF ; ri v4 match tween t!] er and which, in a short time, creates pressure to force the water through the opening in the bottom soon as the hu!J is sufficiently lighten rises to the surface again. The air will then open, allowing the gas to es and the operation will be repeated the carbide is exhausted. After being thoroughly tested fot ance and operation, the whole ship be given several coats of paint, and crease its likeness to a “sub,” port should be painted on the conning suft out denatured alcohol and four parts of by volume, make a satisfactory anti ng solution. It does not begin to t! until the temperature reaches &° | becomes slushy first at zero tempe: John C. Lee, Welleslev, Mas Removing Odors from Ice Box Odors in an ice box can be elim! by placing a pan of coke in the bott the box. This will absorb all the and prevent the milk from tasti onions or vegetables. In factorie where bad odors are apt to spoil the lunches, a box can be constructed t them and a large pail of coke place

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POPULAR MECHANICS 1001 noleum Replaces Auto Carpet staples are the only materials required Form a hook on each end of the wire and brought in on the feet, cuts and then bend the wire around the 3-in. side ears the floor carpet in an auto- of the board, about 4 in. from the end, \ piece of linoleum, preferably d plain brown or green in color, "X3"BOARD«, substituted for the carpet. It = illy fitted and cemented to the ane aial Yo a rds with linoleum cement or white ME Lg d will wear as long as the car is ‘ A efore laying the linoleum, all holes G og boards should be plugged up and ws ties planed off. The linoleum is fl). ixed or a coat or two of varnish This will prevent stains and oil from being absorbed. When a ippearance is desired, the carpet replaced in a few moments. , HEAVY WIRE? xtra Bookshelf Economizes Space arly all bookcases some space is hen large volumes have to be ac- lated. Two shelves usually have to be spaced widely apart to take the ye ecching Poultry largest books. Wire on Frames If there are not enough tacking it in pl ice with the staples of these to fill the wire is tacked to one side of the frat the whole. the stretcher is used to pull it tight This shelf. an ex- is done by catching the hooks in the sel tra shelf can vage of the wire and, resting the short be fitted as end of the board against the outside of shown to take’ the frame, pulling back on the long end two or more G. H Sulzer, Rose Tree Road, ra rows of small- ann eae er books. As Screw Caps for Tanks shown in the insert, this shelf consists Sree ie ew — vertical and one (or two) hori- Peninss that are too small for the filling | boards, its length being determined nozzle at the service —_ J e space left vacant. The horizontal tion. It is a simple matter, eat | or boards are fastened to the up- however, to fit . ew oP ; by wood screws passing through the that will answer the pur- To give the whole a good finish POS Get anordinary ont of the extra shelf may be covered 8T&45© CUP, such as used veneer or varnished to match the © heavy. machinery, C, A. Oldrovd, Barrow-in-Furness, measuring from > to ¥ ‘m. nil : in diameter. Saw off the cup just at the bottom of the large cap threads, as Stretching Poultry Wire shown in the illustration, and discard the lower por- |: co.pereo retching poultry wire on frames is a_ tion. Cut a hole in the trop of tranx ult task if attempted with the fingers. tank and insert the thread- tool shown in the illustration, which ed cup, allowing a thread or two to extend be made in a few moments, will save’ inside. Solder carefully all around the time and work and prevent sore fin edge of the cup, drill a small air hole in \ 3-ft. length of 1 by 3-in. board,a the cap, and the job is finished.—N. 1 of No. 9 iron wire and two small Peterson, Corvallis, Oreg. Many of the tanks sold for carrying an extra gallon of gas or oil in the auto have

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POPULAR Effective Churn Plunger hastened con eer with ty SAW CUT woo BLOCKS WOODEN PIN 4d S t } —-_k 4 SGALVANIZED-IRON Revolving Blades I Making unger with Two ghtens Task of Butter 1 roc ysite ait | Wi the low er square blocks, rod and just between the ittached < how Slots are 11 I ryonally mM these blocks to re which are cut from heavy The ] ] ides, ’ plunger is worked B.. & Testing Brassware Ma household i as Ware on the market, such ks, crumb ses, cic... brass but sheet with a iting using photo, steel under the oe magnet as -can detect t W eibezahl, Syracuse, MECHANICS Simple Trick Saves Alarm Clock perfectly good alarm clocl Many {| thrown away every year because 1 with which they are lubricated co dust. The dust parti small. sufficient to gut quantity of though mechanism, and, are as a thorough cle often costs more than the clock is it is discarded. The the however Vn on 11 ais 1 ‘ LOHuUOWINE Kil Place stove and allow it clock, a hot this position for several minutes. Re it with a cloth, to avoid burning t gers, and a few vigorous shake ally suffice to start the mech cure is due to the fact that heating has thinned the o1! to flow trom the 1 l V bearing dust with it Clean-Out Tee for Furnace Smoke Pip In furnace smoke pipes arrang h Ip i | orizontal 17 4 Sught ang! e or ina deposit of ashes, soot and other ways accumulates, and the | : to the bottom, obstruct pipe and re- tarding the escape of the smoke and vas. In hori- zontal pipes the fine ashes stirred up when clean- ing out the furnace some- times are per- mitted to come heavy enough to cause the break, and when the furnace is n¢ they absorb moisture to such at that the pipe will rust throug! To clean out such pipes, it is usu dismantle ] i¢ 1 tions ta be- essary to c . of work a By shown in the drawing, will be Instead of u iat has a cap made to and the removing the however, made easy. elbow, a tee tl open end is substituted, come accessible by Using Plywood Plywood consists of a series ; of wood, glued together w of the running at each other, making a will not split or break lay ers

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POPULAR MECHANICS cether properly with a_ water- there is little danger of having separated due to the action of Basswood is generally used rength and light weight red. Yellow pine and _as well have a beautifully figured grain ommonly used for door as oak, tops. lvantage in using ply- at unusually large sur- obtainable in a single or example, a 3 by 6-ft. ilvwood can readily be whereas it would be ficult to obtain a single, rd of such dimensions. ich a big board would irp, but this is not the plywood. A disadvan- using plywood, however, t] must be con- his is done by mitering or using molding. rder to cut plywood a fine-toothed saw, such ksaw, should be used; a will cause raggedness bottom ply, as its grain is gener- ht angles to that of the top laver. e edges ‘le Trailer for Carrying Children ren are often given a ride on the ars of a bicycle but this is not very table for the rider nor easy for er. For this reason a Winthrop, in made the bicycle trailer shown photo. It consists of a wooden built upon the axle of a discarded b. Seats for hildren are and a wooden tongue extends e frame. This is high enough to ught over the rear fender of the nd attached to the seat post. two c Keystone View Co Bicycle Trailer That Is Safe and Comfortable Combination of > 1003 Combined Garage and Boathouse Instead of building a and boathouse one architect separate garage constructed and Boathouse Pri Convenient Garage ves 1 the combined shelter shown in the ] The structure was practically a two affair, the lower part serving as a and the wpper Stairs are built inside, as shown. its economy and convenience, an tage of this arrangement is that it as a common storehottse of fuel and sup plies for both engines —Wm. B. Thomp Pittsfield, Mass. Story ] oak house part as a garage Besides advat serve son Removing Scratches from Auto The finish of the auto body is often marred accidentally by screwdrivers, wrenches and other tools, and the finish is good, the scratches stand out like the proverbial sore thumb. \ method of removing such a rather of hiding it so that noticed, is to apply everal of shellac over it, keeping tl thin as applying enoug pletely. thoroughly, the when possible and rfa cover the sare , , ; When the ast coa Ssurtace 1s surtace to crocus powder and oO ive oil ona Cit the le ] ‘ ‘ cloth can also ve used remove th ridges around Crocus | purpose, taking care to use plenty) on it. When rubbed until no ridges, a coat of good body polish be applied. oil the surtace trace remains hould

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POPULAR MECHANICS

quasshenstiods . - a. <a A Platinum-Point or Nail File Cures Fouled Distributor Points

A Piece of Chewing Gum Stops a H in the Gasoline Tank

Ammeter Connections Spell uble Often Hard to Locate Quickly

It Is a Simple Job to Tighten the Battery Terminals, If Loose _s — ——

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TROUBLE “SHOOTER How. to Prevent Breakdowns on the Road )K at the gas, water and oil and give ires or touring. ‘turer. hains and towrope, f you 1\ wise illiant, ld a few n the side Borrow mani and put re, 182 sce. Beg sticks of ing gum ister, and ret a hand- wide out tray. long a nail, rit may in handy. t few tials you will (ly to cope any of the les that arise 1odern mo ay: A nail those bands desk nose a kick to see if they have ir, when you Under the seat, or in is the tool kit provided by the If you are wise, there’s a stranded motorist get the old bus_ calls, and every squads carried a | ake off points. last vear trouble alone accounted for 10,173 of tho man nail commonest of all ignition troubles the Popular Mechanics asked the head of the service department of the Chi cago Motor Club to tell the most fre- quent causes of trouble to motorists on the road, and describe the cat owner could make his own simple emer gency repairs. how rhe service department of this auto club handled 22,471 calls for help last vear. Of this number, 15,548 were taken care of by repair men mounted on motorcycles with sidecar tool kits; +865 required service cars; 966 were answered by both motorcycle and serv- ice car; and 1,092 were canceled be- cause the driver found the trouble. The repair crews traveled 62,616 miles and their repair jobs included: sattery Lock 3 Brakes locked 9 Mi Cas . >? huretor 2 On gum and Ienition late on the hie to correct the emergency fouled distributor | when tl goes then step starter. If tl nition poin don’t spark, spread them a bit sip the file be tween them, press them tightly to gether, and wit! draw the file, re- the oper- ation until the points are true. A five-cent file in pocket Save an e@CxX peating the car may pensive garage ‘all A regular ibutor file is much bet ter, otf course but point It Wi stop a leak ad of chewing are not luxuries for the car owner. sui he work of Porter Russell, head of | or ervice department of the Chicago or Club, a garage chief whose emer- repair squads had 22,471 calls from a rubber’ in the gas tank, or plug a hole in the pre stem. And the chewing gum the rubber band can be used an emergency repair on a leaky tank float The e-teed s\ ! to make vacuum electrical system »ss the weakest

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POPULAR It can go wrong in ys than all the other parts of the machine combined, but with a bit of knowledge and a few simple mate rials probably half the troubles that bring to a stop could be repaired by the driver, WwW to the garage. Out answered last 10,173 classified 2903 due to the 1 point in a motor Car. more different wavs cars ithout recourse oft those 22 17] calls only but to the electrica and of declined to in the electrical svstem. of the 1 re not trouble S, e Starter horns that on ] ition complaints point - and man with a SUXty were Tew cent repalt hie. . ° loose wires ot randy per l ot battery and the other 10 per cent came 1-out switch tumblers 1 burned the wiring sy shorts in stem or ‘res he 60 per cent due to loose wires, the | three sily hav e been e result of one ot corrected loose ammeter \ single wire ammeter on the in- and is f with a Frequently t works loose off entirely, t ie electrical not only will not blo \ lights do connections came 4 to the recordit ent board, 12 astened terminal. here is a break in In that case the start, but the horn nor the lights work. If horn and the trouble cannot be a broken circuit there, and can be traced to b coil, or, possibly, corroded terminals. They may be corroded lv that ficient current will not operate starter, and ohts Che ciean off corrosion, however, and it come system. will not W ork, e 1 aistri batter utor or Su ] t! oT €1 ough tor | orns or li e engine rood connection to be made e is more trouble with an ammeter retting loose without coming off contact jolt free. it entirely he come i\ . ' iin 1 ir to1 11 - 4 abdlishn and ; comple ammeter again, blui Battery trouble, > . Z90S ot this one « 1 1 it ib’s re ! ot negiect, ~ sua lly the result MECHANICS allowing the battery to run down stop at the garage or battery-service tion every two weeks for testing an ing with distilled water would pre most of the trouble here. To dete: if the coil is burned out, it is only sary to remove the connection Ik from the center of the distributor t coil and to hold it about 4% in. awa its terminal. If, | the e1 cranked, a spark jumps from termi wire, the coil is working properly ar trouble lies el This test used with intelligence, however only after making sure that the wir ing from battery to coil are in and have good when sew here. be BP 0 connections. Starter trouble in 90 per cent confined to a_ stuck drive, while the other 10 per cent inc worn-out brushes or damaged com: The cure for the stuck d simple. Put the gear in high, makin: that the ignition key is turned off then push the car backward and f with a quick, rocking drive W ill be loosened | he back Wal tion is the one that frees the drive tow a car forward with the starter the forward movement | Worn-out brushes considerable damage to the st low, an will burn and pit the commutator some melt the connections. The only here an by the garage man. too complicated, of tl r Cases was tors. motion, a Only may arter thev will cause electric arc cases, even soldet armature ventive ins] The starter is a ind unhandil cated for the average driver to tackl Carburetor troubles accounted fo1 calls for service. is occasional too The expert's best is, “never fool with the carburetor « a? with ar, a lot of people imme start picking on the mixing arr: ‘A carburetor, if once adjusted eldom gets out of adjustment,” say Russell, “but a lot of drivers let Dick and Harry who comes along th: and offers his assistance, start foolit the carburetor. Then when they the job and our repair crew is call not only have to find the origina! tt and fix that, but readjust the carbu as well.” His is te confine carburetor investigations to cle filter screen of dirt and water Gas-line and vacuum-tank troubl se are usually the result of dirt o and in the vacuum tat the drainage sump in the bottom tank at inte ac e vel ad ice Wi the screen Vas should be cleaned No matter what may be the tré ingel

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POPULAR MECHANICS An Occasional Shot of Oil on the Springs Saves Leaves A Length of Inner Tube Protects the Distributor from Rain Testing the Ignition Coil to See Is Burned Out Adjusting the Horn Is an Easy Mat- ls ter for Any Owner ‘a pleeoe dalla

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1008 accounted for 554 One device on the logged gas lines trouble calls last year. market now makes cleaning simple, re- minds the motorist to do it, and likewise keeps dirt away from the vacuum tank. It is a filter with a glass bowl, so that the driver can see the gasoline passing through on its way to the vacuum tank, and can see the dirt collecting in the filter screen, where it can easily be removed. Getting back to the chewing gum and the rubber bands, how many motorists know what to do when the solder on the vacuum-tank float works loose and opens a minute hole through which gasoline seeps into the float ball? The hole is usually so small that the gas may take days in filling the ball, but once its buoy- ancy is gone, trouble follows. The symp- toms are flooding of the vacuum tank, the carburetor, and even leakage of gasoline from the exhaust, for the suction of the intake manifold draws raw gasoline into the cylinders in a steady stream. The motor-club repair men make an emer- gency repair by punching two small holes vith a nail on opposite sides of the float, then blowing in one to drive the gasoline out of the other. When the ball is empty, they snap a wide rubber band around it, covering both holes, restore the float, and the car is ready to go on to the next serv- ice station to havea new float installed. In the absence of a rubber band, the two holes can be stopped up with bits of chew- motorist who runs out of gas we ith us always, and, strange to re- his numbers remain constant. This club carried gas to 518 drivers who were stranded far from filling stations last year. As stated, the number of careless ones is practically the same neath after month and year after vear. As fast as one is ured by experience, it seems another made to when his tank is nearly different prin and when enipty nly pull a rod and supply he old re- with- line, however, remains a spare can r the seat. An old gallon oil tin, itted with a cork, will do. If the driver is more particular, he can get a set of three neatly painted red, white and blue cans for spare supplies of water, oil and gas, fitted with clamps to attach to the running board, or to go under the seat or in the back of the two-passenger car. Only five out of 22,471 motorists takes his place. Devices are j the d One, working on holds back a 2 allon ot fuel, river , lving Indicates an gasp driver need he reser medy against being caught who POPULAR MECHANICS called for help last year needed wat: small number probably being due fact that water usually may be obt from the nearest home. The winter season brought car owners who let their engines solid, solid that they had to be t in for repairs to cracked cylinder ja or other troubles. Yet every servic: tion sells alcohol and is equipped chart showing the proper amount t to guard against freezing at any temperature. Alcohol, unfortunate! porizes much more quickly than and needs frequent replacing to kee; mixture up to standard. Failure t serve that fact accounts for most ot cases of freezing. Inability to start cause of cold motors brought twent appeals for help. A cold motor, down battery, and add to that the grade of oil—one too heavy for vy weather—and a call for the trouble is the result. Two hundred and fifty motoris stuck in the mud in one year amon, club’s membership. The automobile will rescue the member who gets strat in the mud on a public road, but drive off the road into a field if you pect your club to come to the re They won't do it. The service mat advice is: Don’t try bad roads. body thinks his old can has about teen more horsepower than anybod bus of the same make, and can get th where the other fellow’s car can’t service head explains. “Result, the calls for help. If you do get dou't try to put on speed to get out vou'll only spin the wheels and sink Put the engine in low, try to turn from sidetoside. Keep st ahead. If your front wheels are the engine must push the car agai: weight of the mud ahead. Ii the start spinning, put on the em brake just enough to stop the spin will frequently enable them to tak If vou can get any old rope, board, sacks, or even a quantity of paper under the wheels to help give tract Also, he advises, if you have chai them on before tackling wet or roads. A big cab company, op 2.750 taxicabs of its own, and manu! ing standard cabs for similar con all over the world, has an ironcla that at the first sign of rain every must stop and put on his chains. ence, and not a desire to help the manufacturer boost his sales, is that order. — 405 ut go slow, al 1 |

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POPULAR MECHANICS 1009 A Nail Driven between Connector and Post Tightens Battery Connection Cleaning the Vacuum-Tank Strainer Prevents So-Called Carburetor Trouble DONT NEGLECT CHAINS If the Hole in the Gasoline Tank Is Plugged the System Balks ~% may 4.8 “J Locked Brakes Can Be Prevented by meal a Dose of Penetrating Oii Now and Then | LOCKED BRAKES

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1010 POPULAR The service manager also advises every driver to always carry a towrope coiled under the seat, where it won't take up much room. With it you can stop and help the other fellow out, but, more im- portant still, the other fellow, who per- haps hasnt a tow rope, will stop and help you out if you have it. Locked brakes accounted for 109 of the club’s calls for help. Every now and then locked brakes cause a bad, and sometimes fatal, accident. In a spectacular accident in a middle-western city not long ago, the brakes on a four-wheel brake car became locked on a smooth boulevard. «The sedan struck a isle, did a neat carom, turned a somersault, and landed upside down, the driver with broken glass. Fortunately the sturdy to)» con- struction held up, and the owner crawled out, badly cut and bruised but alive. The damage included a broken front wheel, all windows smashed, and top and sides badly dented, while the paint job was near- lv a total loss. A can of good penetrating oil and an occasional inspection of the brake rods and clevises will prevent lock ing of the brakes, which is usually due to rust in the joints. Rust causes all kinds of accidents, in- cluding broken springs. The spring leaves will not slide smoothly over each other as they bend if they are badly rusted. The result is a hard-riding car, and eventually a broken leaf or two. If you change your at home, the service manager recommends taking the old oil, loading up the grease gun, and squirting it over the springs. To return to the car’s electrical system, a hard thunderstorm will flood the service station with frantic appeals for help, when all that is the matter is a wet coil, distributor or spark plugs. An rainstorm will bring in 600 calls in a single day—ten times the usual num- he imple—an old oilean Whenever a rain motorevcle emergency halt gallon ner could safety showering ] crankcase 11 average ber. filled with comes up the l¢ cure 18 kerosene vet out their cans and a crews 7 ] pal he ow of kerosene, to d how. -erosene squirted do it ne Knew over the distributor, coils and spark plugs carrv the water away, ind a few swipes with a dr ish the job. Never lift the motor hood during a rain, 1 will 1] vy cloth wi fin umbrella or other covering ready to hold over the en- gine 1owever, unless you have a1 Likewise, if you wash your car at home, ft is always wise to place a water- proot covering over the motor Water trouble around the distributor head can be avoided by cutting off a sec- tion of an old inner tube, 8 or 10 in. long, MECHANICS and placing it over the wires, tying the top. The little funnel-shaped made by the puckered rubber abov: tie can be filled with melted paraff wax to make a water-tight joint. An occasional source of trouble plugged gas-tank cap. The vacuun system will not work unless the small in the cap is kept open, to let air replace the gasoline drawn out. casional attention with a pin will kee free from dirt. Every make of car has its own qu When a Ford, for example, starts to b ing it may be traced to a broken t spring. An emergency repair can be 1 by drawing out one coil of the spring bending a new hook. Another frequ: cause of bucking at low speed is a spark plug. One popular medium-; car has been causing considerable trou because of broken insulation on the tension wires in the late models. Or: car in question the trouble comes fr: arrangement whereby two high-te: wires are clamped between two plates. The wires fit into grooves and held in place by tightening two thu: screws in the plates. A motorist ha occasion to remove the outer plate to let the wires slip out of their g1 and then the thumbnuts will ti against them, crushing the rubber 11 tion. Another, and much higher car, has high-tension trouble in a diff place. The wire leading from the c« of the distributor to the coil passé beneath the instrument board in fr the passenger's feet, and occasional will kick it off in shifting his feet. Nine motorists who appealed t club for help last year because their ! would not work, and who didn't drive through city traffic without a device, could have saved time by kn a bit about electrical horns. A loose nection, lack of a drop of oil to kee; armature turning freely, or need of turns on the adjusting screw caused trouble. All three can be corrected the outside, without taking down the Most signal devices for automobile equipped with adjusting screws to late their tone. Occasionally the ja cause the screw to work loose, until f the revolving armature does not co! contact with the diaphragm. Lost keys occasionally bring call help. The service manager advises | three keys, one at home, one on t! ring for the car, and the third o1 regular key ring in your pocket. T| at home is insurance against losing

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POPULAR MECHANICS rs, and, if you have a closed car, in your pocket guards against yourself out of your own car by he other in the ignition lock. One for example, had to hunt through on a lonely country road for a break a $12.50 plate-glass window because he carried both keys ¢, and left the bunch in the lock st of emergency repairs that can le on the road is legion. One example, lost the cap from the which operated on the pressure An emergency cap was made ection of an old inner tube, but, vire to fasten it in place, he in air-tight seal by placing the he rubber cap, and then screwing tinst the body of the car. tem. An Improvised Shower Bath ive found the improvised shower in the drawing very success the Philippines where we had no water connec- tions, and it will be found equally effective on a camping trip. Take a _ 5-gal. oil or gasoline can, cut off the top, and nail a piece of stick across the open- ing to serve asa handle; then puncture a num- ber of small holes in the bottom. Cut asquare ot heavy canvas to cover the bottom of the can, and tie a cord from each corner of the canvas to another running a beam or anything else enient in the house or tent. Support overhead in any suitable manner e can (the canvas will hold the some time), step under it, and he string. This lifts the canvas, and ater pours out of the holes in the m. An ordinary shower head may oldered into the bottom of the can if red—Mrs. L. G. Smith, Lloilo, P. I. NE TANK , CORD / one over An Arrow Parachute \n arrow parachute gives the young- sters much delight. It ordinary ar- and a square piece of clo t h, heavy cord being tied to the corners of the cloth and to the arrow, just below the head, as shown in the drawing The arrow is handled in the usual way with the cloth folded over the head. While it is traveling upward, the cloth stays tightly around the but as soon as the arrow starts downward the cloth and fills up with air, causing the arrow to come down slowly. Ot course, the head must not be too heavy or it will come down first and then the cloth will not open. The arrow must be shot upward vertically —R. A. Johnson, Portland, Oreg consists of an row a ~ \ \/ <— é , DOWN stick, opens Neat Spark-Plug Holder The shell of an old lamp socket makes a good holder for carrying plug he may inside of the dash by means ot a bolt, as shown in the illus- tration \ for the punched or drilled through the shell opposite the slit used for the or pull chain, the inserted this slit to the A spare plug ere not be d imaged, as the she 1s a spare spark shell be attached the SCTEW oT hole screw 1s key and screwdriver is through drive SCTeW home will with insulating paper, and by wrapping the plug in a rag, it can be stuffed in tightly. carried holdet lined heavy \

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Praia = Ma a ml My ge Moe eS: "| Ni ZI nen Part I—Routine Construction Details tip: modern home owes much of its charm to built-in furniture. This is natural, as such furniture is designed for a certain place and use in the house, har- monizing architecturally with the build- ing and sharing the color scheme. Being readily shaped to fill nooks and corners that otherwise might be useless, built-in features are economical of space, and often serve to hide unsightly recesses in walls. Happily, it is adaptable to most houses hether new or old. The cost of installa- tion, moreover, need not be prohibitive if the owner has had experience with car- penters’ tools, for the building of such fur- niture is quite within the powers of the man who is capable of making neat joints in wood, | ‘ertainly any time so spent will l rich return in comfort and beauty n the house, while adding materially to he value of the property. Since nearly all built-in furniture de- pends tor much ot its support and bracing on walls that serve either as a backing or a housing for the cabinet, there are certain routine processes common to all, which, once known, take much of the difficulty out of the construction. The drawing illustrates two methods of joining stiles and rails. The stock used is commonly listed as 1% by 3 in., but ac- tually it is more often 146 by 25% in., due to material lost in surfacing at the mill. Hence if the builder desires material ex- actly 2 in. wide he must mark it “net’’; but, if it comes crooked, subsequent planing to straightness will make it rather under- size. For inexpensive work the nailed joint 1s very common; and under certain circumstances, especially if reinforced by blocks glued and nailed behind, may be quite substantial. To nail a rail to a stile in this manner, clamp it into place and drive a six-penny finish nail into each 1012 edge, being careful to keep the face flush and the edges in position. 1 drive another nail in each edge and them all up. With doors and draws position in the completed'cabinet, the 1 are concealed. If the stiles are in su position that no clamp can be used, | the lower edge of the rail while nai and careful work will bring a tight The doweled joint is preferable to nailed, and should be used in home of this kind. To lay out for the d holes, mark a line with the gauge o1 end of the ri ail from the face side an the edge of the stile, and, placing the t face to face as shown in the draw square across both pieces. The inter ing lines are then pricked with a na awl for easy centering of the bit in b For 1\%-in. stock %-in. hardwood d entering 114 in. into each piece are cient. Bore the holes 4 in. deeper in. to the bottom—to allow for ai glue imprisoned below the end « dowel. Take care that the holes squarely, especially in the making ot doors, ior if they are out of true the t1 will twist, even though care is tal dry them flat. It can be taken for g in door making that if the door dos lie flat of its own accord when first bled, it will not long remain flat subjected to the strains of shr and swelling. Narrow boards are doweled toget make wide ones, or are glued and forced with corrugated fasteners. fasteners, or clamp nails, are drive: the backs of the boards across the while the pieces are still in the cl For good results the work should removed from the clamp until dry, tendency of these fasteners is to drt back of the joint together and to op« e1

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POPULAR MECHANICS x4" PINE” HOMEMADE. CLAMP CORRUGATED -~ FASTENERS .. FACE SIDES TOGETHER (STILE AND) STILE AND |RAIL JOINED | RAIL NAILED (WITH DOWELS } Se f | | USE OF CLAMP NAILS | | | | Nas TWO METHODS OF JOINING STILES AND RAILS “a , | a Be ; CORRUGATED — é; || FASTENER GUIDE STRIPS PLAN OF DRAWER FROM BOTTOM Details of Construction of Panels Joints, and Drawers for the Vari- 5’ ous Pieces of Built-In Furniture ~- 8 STOCK to Be Described in Subsequent Articles LIP-FRONT DRAWER DETAIL OF DRAWER CONSTRUCTION

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1014 POPULAR the front slightly. All waste glue should be scraped from the face side and the joint surfaced and sanded; the sanding dust caught in the glue makes the joint almost invisible. For built-in furniture, drawer making is comparatively simple. The fronts are usually of 34-in. stock, and the sides, of 5g-in. material, are rabbeted into the ends, with the back in turn set in rabbets be- tween the sides, six-penny finish nails be- ing used to hold the joints. The sides and front are grooved to receive the bottom which is built up of % by 6-in. tongue-and- grooved pine or fir. The back is equal in height to the distance from the top of the drawer side to the groove, and is assem- bled with sides and front, the bottom be- ing slid into the groove afterward, and held in position by brads. If a really high-grade bottom is desired, use three- ply panel veneer. The front may be of the lip type, in which the top edge is rabbeted and a cor- responding lip is left on both ends, the edges being rounded or chamfered for neatness. This front hides the fit of the drawer, and thus allows of some inaccu- racies in size. If the front lacks a lip, the drawer must be made to fit very closely, Substantial Folding Tables Caterers, hotel keepers and others using a large number of tables, which have to be carried from place to place frequently, will appreciate the compactness and sturdi- of the folding table shown in the illustration. It is made in two parts, the ness F LATCH

Sturdy Caterer’s Tables Fold Compactly When Not in Use top and the supporting framework. Two opposite side braces are stationary while MECHANICS so that when the front slides in flush the stiles and rails but very small cl ances will show. The front is ordin: slightly wider than the sides, with the edge beveled inward, and the ends pr sufficiently to strike against stops 1 against the stiles, thus insuring the cl drawer front being flush with the fra If the drawer has a center slide, guide strips must be put on the bott as shown in the drawing. To locate t! close the drawer, and, reaching upw from underneath, scribe along the bott on both sides of the slide. Rub the ru and guides with soap or paraffin to red friction. <A _ well-fitted drawer, eve: wide, will close readily by pressure f: either end as well as from the center Clamps are expensive to buy, but subst tutes are easily made. On a suital length of 1 by 4-in. pine nail solidly crosspieces, one near each end, allow 1 in. more of space between them t! the width of the frame to be clamped putting one piece on at an angle of | in 8 in. Against this is driven a wedge corresponding pitch. Subsequent articles will describe construction of many articles of built furniture in detail. the other two are cut in the center shown and provided with a hinge « this cut on the outside, and a hinge in ¢ corner on the inside. A latch is arrat on the inside of the sidepieces to | them rigid while in use. The meth: folding the table is indicated at the The top has cleats on its underside to | snugly against the inner edges of the s so that, when it is put on, the table stand squarely without any wiggling the hinges.—A. C. Cole, Chicago, III Starting a Balky Ford in Cold Weather Faulty ignition, a weak battery and weather in combination usually mal Ford engine very hard to start; if t! brator points are worn or poorly adju the motor may prove quite balky on « battery or magneto. In such a case quickest way to get the engine start: to coax the coil points to vibrate by idly tapping the vibrator arm wit! fingers, while pressing the starter bu' If the battery is completely run dow: ignition should be switched over t magneto, and another person should the engine while the driver manipu the vibrators as described.

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POPULAR MECHANICS 1015 rving Leaves in Specimen Book ommon method of preserving pressing them with a flatiron on beeswax may be improved in wing way: Paint the underside leaf with linseed oil and iron it telv; then paint and iron the up- in the same way. This treatment e leaves sufficient gloss and keeps iable. It is not necessary to press the leaves beforehand, although iv be done if desired. The tints leaves can even be preserved by the upper side with the oil and them, without ironing, between pers and under weights to dry. nple Water-Distilling Apparatus can readily be distilled in the boratory or at home by the simple ement shown in the illustration. An um pail, filled with cold water, is led opposite the spout of a kettle 1 water is boiling. The steam from ttle will then strike the cold side of nd quickly condense. The drops are collected in a clean porcelain iced underneath. An aluminum i good cooler, because this metal is ng Water by neecung Steam of Kettle against Cooled Vessel conductor of heat and the wall is Renew the water in the pail from to time before it gets warm. Under 2 oz. of water were'distilled every 10 es with this arrangement. Golf Practice at Sea eut.-Commander Davis, chief engi- of the U. S. Coastguard cutter “Tus- ” doesn't propose to have his golf spoiled by his long absences from the links while at sea, so he has turned the quarterdeck into a practice course. He took an old ball, drilled a small hole through the center, and passed a length A Tee, a Ball, a Length of Cord and an Old Shirt Provide This Golfer with Excellent Practice at of heavy cord through the hole, k1 it at both sides. To the other end of cord, which is 5 or 6 ft. long, is tied an old, heavy shirt. He uses a rubber tee, which can be obtained from any sporting- goods house, and this is fastened to the bulwarks with a length of light line. He can tee his ball, take his stance, and whack the ball as hard as he pleases, and the drag of the heavy shirt prevents it from going very far, while the line prevents the tee from going overside if hit. This provides fine driving practice, and the idea should prove of value not only to sea-going golfers, but also to tho shore who cannot get to the links enough, or who wish to improve stroke in spare moments. fo prevent marring the deck Mr. Davis uses 1 of heavy packing, placed under the Holder for Glue Tubes Smal! glue tubes are hard to keep at hand on the desk or in the drawer without having some of the contents ooze out over the papers or on the surface of the desk. A simple holder, which eliminates this trouble, can be made by cutting three sides of the carton in which the tube is packed so that the upper end of the tube projects. The upper portion is then doubled over and tacked to the wall.

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Steps Built on Drawers Kitchen cupboards often extend to the ceiling and their highest shelves but are are hard to get at Pulling out the drawers and standing on good storage places A Permanent Shelves of Stepladder for a Kitchen Reaching tl Cabinet 1 ] dges is both awkward and dangerous but 3'%-in. ledges provided just inside ot the drawers, as shown in the illustration make it to use them The ledges extend act thee sate as a stepladder oss the entire width narrow so that ar- of the drawers, but are ticles kept in the latter are as easily reached or stowed away as before the change was made A. Mav Holaday, San lose Calif Preventing Choke:-Wire Damage on Ford Radiator It is usually necessary to choke the car buretor of a Ford car before starting the ind the choker wire is almost in v placed between the radiator tubes engine 1 VaTlab so ti it can easilv be grasped when , oO that 1t can easily be grasped when one crankir h This wire will hole in the soft 1g the engine eventually wear a tubing and cause a bad ieak, whicl cult to solder. An vent this is to solder a small copper 1ais dith excellent way to pre metal pipe be so that it comes ind the radia rough this pipe rub against the \ small amount of lubri cant may be placed in the pipe when giv- ing the car a general greasing Bunyan Kennedy, McCool, Miss radiator tubes, both in front and bel Che wire 1 th IS passed tween the flush tor. and thus can radiator tubes no longer POPULAR MECHANICS Protecting Auto Upholstery While making repairs on closed « often happens that the upholstery is by the workman. To prevent covers of canvas or other heavy clot be found useful. Che covers are m pieces to fit over the whole uphol including the sides and doors, large pins being used to keep them in Car owners who do their own repair will also find covers of this kind s« able as a protection against dirt. —G. A. Luers, Washington, D Simple Roller Coaster \ roller coaster of the kind sho the drawing will be found to give tional pleas ure to chil dren who are fond of skat ing, especially if they live near a_ hill having a mooth side- Wa l k on which they can coast. he coaster consists of a l b V 4- i n. board about 5 tt. lowe, with half of an ordinary roller skate bolted on it at one end as shown. A seat and handle are also bolted across the the seat consisting of a short t-in. material and the handle of a of broomstick. The method of usi: device is apparent from Roscoe A. Johnson, Portland, Oreg 1 } Inexpensive Window Shades On several double windows in 1 I used large vide, instead of a sing window. These were months and impos clean. As \ rathe sive, | decided to substitute che terial, light in color and w purchased 15 yd. of 72-in. bleache ing of good quality and cut this int shades, about 7 Opaque e shade soiled were almost new ones were ishabl this *T OTeCASE lengt! the draw n

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© EN POPULAR MECHANICS lengths. After hemming them at id to receive the slats, I starched nd stretched them out to dry in the vay as lace curtains. I then ironed smooth and tacked them to the roll- the discarded opaque curtains. made in this way are translucent, the rooms plenty of light. Every the curtains are laundered I also er the shades. opaque curtains previously used ibout $32, while the total cost of homemade curtains was only $12.— Minnie T. Miller, Wells, Nev. Support for Baby hen babies are just able to sit on the ind play with their toys, but not enough to keep from falling over, re usually propped up with pillows. e are, however, rather warm and un- rtable, and it is much better to pro- support of the kind shown in the il- tion. It is made from two wooden hoops,a couple of slats, 2in. wide and 14 in. long, and a few narrow boards, long. One of the hoops is cut open, third of the length cut off, and the joined to form the smaller upper The hoops are fastened to the rds that form the backrest, with small and the 14-in. slats similarly at- ed to the hoops to brace the “baby ” All bolt heads should be counter- so that they will not hurt the baby ir its dress. The assembly is then ipered smooth and varnished, and firmly fastened, at some conven- ient corner, to the floor by means of two e Support, Made Barrel Hoops Slats Prevents from Falling Over t brackets at back. The per loop holds v upright and lower loop gives plenty of room for its s and playthings, which cannot roll out its reach—Minnie Britt Riggle, Ba- a, Kans, articles the 1017 Luggage Carrier for the Roadster Farmers who own roadster automobites find it difficult to carry egg cases, cream cans and other without tving them on running Homemade Luggage Carrier on Roadster Is Useful to Farmers and Salesmen hoards. This difficulty is overcome by providing a luggage carrier of the kind shown in the drawing, which is also con venient for salesmen. Two 30-in. lengths of 2-in. angle iron are securely bolted to the frame under the rear end of the car with the ends projecting about 15 in Across these ends is bolted a brace of 1-in angle iron, long enough to be bent over to permit fastening the ends to the fender with short bolts. \ piece of l-in. board, just long enough to fit on the frame thus made, is provided with cleats, and serves as a floor on which the luggage is carried The carrier may be enameled t color of the car and will support a weight of 300 Ib. safely o match the Shaving-Brush Holder A shaving brush is injured by permit- ting it to remain in the mug to dry. It should be suspended with the hair down. A holder can readily be made from a piece of wire bent to form forklike clamp, with the back-bent wire ends pointed The clamp should fit the neck of the handle snugly, and the pointed ends are driven into the wall or other support. Or a loop may be made at each end of the wire so that the holder can be attached to the wall with two small screws.

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POPULAR MECHANICS heavy black liquid of about consistency of water, and into t stir about 3 oz. of clear she mixing it well. Too much sh« must not be used or the finish have an undesirable gloss. varnish will serve as well as lac. When this is flowed ont handrail it dries almost as fa it is put on, and it does not « off when dry. This gives a finish; if a gloss finish is de more shellac or varnish ma added, but the more varni shellac used, the easier the { chips off. When dusting, u cloth with ordinary furniture ; ish, taking care not to leave greasy. For new handrails painted or unstained, take t small quantity of dark-oak filler, and sufficient lampblac! give a jet-black color. This n a stain that penetrates the Simple Method of Stretching Screen on Wooden Frames cells very rapidly. Flow Pulling Screen Wire Taut When fastening wire screening on wooden frames, one usually has dithculty in getting the screen stretched tightly A good method of doing this is shown in the drawi Two strips of wood, about 34 in. thick, are laid under the sides of the frame and the ends are drawn down on the table with C-clamps, as indicated. It is then an easy matter to tack the screen on. When the clamps are removed the screen will be tight across the frame, and the ends are then tacked without dithculty. ng. Finishing Colonial-Stairway Handrail The handrails on white-enameled colo- nial stairways always seem to be dirty, always need cleaning, and after some time commence to look the worse for wear. All this can be obviated \ black handrail, and black-capped newel posts present a splendid appearance—look better really than the all-white stair does But the question is then how to keep it black, and to prevent it from chipping and looking ragged. The whole secret lies in the kind of finish put on it. If the handrail has ever been painted, take a piece of fine sandpaper and rub the rail until turpentine will “take hold.” The sandpaper must be fine enough to leave the rail smooth, vet cut the paint. Dissolve enough lampblack in turpentine to make a allow it to stand a moment, t! rub it off. Repeat this process until wood is as black as desired, taking care touch up the light spots until the col even. Now rub off all the stain that not penetrated the wood. Polish 4 pt. of gasoline; into this put ; linseed or paraffin oil, rubbing in all tl will penetrate the wood, but no more the rail will have a greasy finish.—G Anders, W. Lafayette, Ind Skid-Chain Cross Links Make Door Handle shows a novel for cross link worn - out skid chains handgrip on ing doors of rages and They are st to the door can also be as handles boxes. »¥ 0 vent the from rusting should be an application of paint.—Albert | Niagara Falls, N. Y @It is much cheaper for country pou keepers to buy the grains and by-produ and mix them at home. The phot (

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Broadcasts from Ocean’s Bottom i diver feels and what he sees as, Atlantic. To those who were listening in in his heavy armor, he “plods to station WIP he told all that he saw in wav” along the ocean floor and his trip to Davy Jones’ locker. This is the the weird submarine world of first time that such a feat has been at Jackson of € Iphia Re- Silver Cup adcasting a lights ; ee. = * ; tempted, ickering, ‘ ~~) a/ atforded shad- as vivid- m +: cribed to — * 4 . me . , sands of . st ee lans not " igo when Jackson, ver from | a d S ] - } ; ed success- . Pe . and : broadcast _ ae | re the bo from the a 5 < f crom vhich he m of the descended

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1020 POPULAR MECHANICS The boat was see the connected by —— : of an old vire to an am is It look plier on the <r oe, the skelet Atlantic City a huge fis] pier near which : Ne . is ‘ it a scho the experiment i “4 f little took place, and playing. a land wire ER . <4 ravs of the hooked up the ~." ' : , which pier apparatus , bs: as ' green at with the broad- “ga depth, shi casting station. ' . their ba The first thing J j After w that the listen- around a second near by and desc its appearance, and of the ocean floor sound, which, ; vicinity, the diver it wa . ' cended, having plained, wi s under water ten the noise oft . utes Upon his the air currents ~ at the pier the dive: in the diver’s a z presented with a helmet. The if . cup, as a mement voice at first a‘ the occasion whe was weak, but P s. : ~*~ ocean’s bottom wa » . . \ = 1 _— yell The Microphone inside the Helmet, Protected by described ” = and when the Sponges; Insert, ‘“‘Coming Up” shore direct fro diver had man on the spot reached bottom, fiftv feet below the sur test was a complete success, and liste face, they heard him say, “On my left I had a variation from the usual prog: Transformer Sealed in Vacuum One Antenna for Several Sets IXxperimenters have long realized the By connecting a “coupling-tube advantages of the air-core transformer devised by WU. S. naval radio experts for maximum amplification at a given possible to hook several receiving wave length, but it has onto a common aerial and each set heretofore been found A receive signals on a different wave I impossible to con- Se without interfering with the othe struct transformers of i } The apparatus has been thoroughly this type that could be : 4 and found successful on board the | depended upon to ie \ te | “Colorado”; the ship’s operators vive uniform and sat- : simultaneously several messages fr istactory results un- ferent stations even while the battl der all conditions. = transmitter was in action, thus e1 Absorption of atmos- - the vessel to carry on several tit pheric moisture in @g normal amount of business. untreated coils causes — The unit includes a resistance serious losses, and that the strength of incoming sig treatment of the coils with gums and reduced considerably, and it is the resins to remove this difficulty introduces necessary to use receiving sets wit! another set of losses equally serious. or four tubes. A radio-frequency Now, it is claimed, these difficulties have the form of a trap, which eliminat been overcome by a transformer sealed generation, is required and a recei in a vacuum tube. The coils are thor using a detector tube. This unit oughly dehydrated and accurately spaced come part of standard battleship « a glass rod, then inclosed in a tube ment. To the general public thi: high-lead-content glass, evacuated to ais also of considerable usefulness a high degree and sealed. The initial efi- eliminate the great number of ciency of the transiormer is thus retained. found on city apartment buildings.

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POPULAR MECHANICS ‘onnecting a B-Battery Switch necting a variable B-battery to a point switch so as to control the rom the front of the panel, there twice as many contact points ire taps on the battery, every te contact being dead. ill eliminate the shorting of the he battery that takes place when ntact is connected to a tap, and lever, in passing from one to momentarily makes contact with \s B-batteries are of low amperage, rting reduces their life consider- ). G. Tiffany, Palo Alto, Calif. A Balloon Aerial vell-known fact that a high aerial he volume of reception on any radio set. Towers and high masts are too expensive for an amateur to build so it is usually impossible to have an higher than a few feet above the roof. However, by using a rubber balloon now on the market, which is inflated with hydrogen, an aerial can be raised vertically as shown in the drawing. This method of hoisting an aerial, it is said, improves reception considerably. The bal- for this purpose are made in dif- ferent sizes and the hy- drogen can be obtained in tanks or be generated from iron and sul- icid. Common illuminating gas o be used for inflating the balloon gas does not possess so much lift- er as hydrogen. aerial loons Railroad Plans to Dispatch Trains by Radio number of tests have recently been by members of the American Radio league and the staff of one of the rn railways, to determine the practi- of using radio in stormy weather gencies for dispatching trains. It is the tests showed the scheme practical, hat radio will soon be installed for purpose s planned eventually itching by radio. to conduct all Setting Clock by Radio A new advance in radio has been made with the setting of a timepiece at the bureau of standards from the Arlington Copyright, Underwood & Underwood Clock Wired for Automatic Setting by Radio, and In- ventor of System broadcasting station. The setting of this clock was made possible by means of a radio-relay mechanism, worked in con junction with a series of retardation relays so that the dots sent during the radio time transmission do not operate the clock-set ing mechanism, but the dash at 12 o'clock (noon) or at 10:00 p.m. will operation. H. 7 Walls, assistant engineer at the bureau, devised the dation relays. Making Phone Jacks Fit Properly It sometimes happens that a loud speaker plug is too short for the c provided on the radio set, and this causes the fiber insulating ring on the plug to ih come directly under one contact ofthe jack, with the result that the phones fail to func- The i either to - PANEL WASHER remedy is remove the behind the 1 bushing on tion. “FIBER INSULATION ul ir to move the jack contacts for , Which is possible with some loosening a screw on the undersi good idea to examine both plug caretully before soldering the order to prevent trouble of this @ Cold-water pipes usually make better grounds than steam pipes or radiators.

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POPULAR MECHANICS HONEYCOMB COILS F AERIAL PRIMARY -OOOS5-MF. EXTERNAL CONDENSER y BINDING POSTS COILS TO REPLACE x ” LOOP FOR USE WITH ! SWPsy THREADED AERIAL AND GROUND } } PLUG GROUND DETAIL OF PLUG - A-BAT. + oO (A AO) \ a. COMB. POTENTIOMETER eee . AND RHEOSTAT HOLES FOR TUBES BAKELITE OR FORMICA INSTRUMENT PANEL 3 ' , ie * 65X17 BAKELITE PANEL FOR MOUNTING TUBE SOCKETS LARGE LOOP CONTAINING 120 FT. OF ANNUNCIATOR WIRE | MOUNTED TYPE..0005-”’ — MF. VAR.COND. “ INSTRUMENT Details of Construction of the Case for the Set Layout of Instrument Panel and Socket Panel and Method of Mounting Honeycomb Coils When Set Is to Be Used with Aerial and Ground BAKELITE SPRE/ STRIPS

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BUILDING A PORTABLE REFLEX RECEIVER By FL. BRiITTIN 7 ] described in this article v 64% by 3 tn wit! a set of verv high efficiency. +in. from one end for the B | 14 tubes do the work of seven vood used mav be selected exibility, ¢ “A be used with the desire of tl portable a1 a Stationary set vel well, and the st which means - 4 in. thick he and it does not is hinged to the case, a great deal to those that the dry cells forming the produced by the are strapped to the inside of the | now in use rhe are two three-cell French No itic to a re- light units; the zinc bottoms ot interterence are butted again a little bra +] cont the Cel ibie use, the UV- 4 QQ ire suit mounting the batteries in this these op- way thev can on but oh easily be rv olts and . q moved when only .06 od ; completely dis- lhe in- q charged lent is de- + eS +9 new ones | to oper é 8 : oi stituted na 2-ft - ecannot ind will construct the 1 on this The Com plete Portable Re“ex § n Use: This § i » at home, ms up to a Remarkab!le Range ; ; S.n » Build any good cabi liles dis- neti iketr will By using honeycomb coils plugged | he job tor isonable sum. It should tead of the loop, much greater dis be ‘d with bber teet to prevent mar can be covered with an ordinary | ’ he sur » al ‘ 1 - turniture nd ground. The wave-length range which it may > set, ani 1 he oO 200 to 600 meters vided with a neat nickeled handle an 1 e inside dimet sions ot the case are ock Poplar takes a good dark oak finisl 1

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POPULAR MECHANICS if birch is used, it is possible to filaments, and is correct for all tubes 1 it to resemble mahogany closely. ing not over .3 amp. If tubes dr: »a good spirit stain and filler, then ap- more than this are used, it is advisal ply several coats of varnish, rubbing down have separate rheostats for eacl between coats with powdered pumice, or It will be noted that the potentio: rottenstone, and oil until a good smooth is connected across the A-batte: surface is obtained. potentiometer lever being connect: In the reflex circuit some of the tubes’ one side of the loop jack; the rheo are used twice, once as a radio-frequency connected in series with the A-batte nplifier and once as an audio-frequency the usual manner. The A-battery fier The advantage of this can be ing posts are mounted on either it glance, as great amplification the potentiometer-rheostat. Just 1 \btained with a small number of _ the latter the .0005-mf. tuning cond: crystal detector is used to insure is mounted on the panel; this is conn: across the loop which is placed t right of the cond The loud - speake phone jack is pla the left front oft panel and the c detector mounte above it. To the of these the B-] ire Bottom and Side Works” of the Port Receiver Note the That Support the Socket the Side View d tone qua ity out distortior ised in this set 1s synthetic - mineral type, number of which are to be found on in a-convenient position for conn the market. In this set the tubes are’ the batteries in the compartment mounted on a small panel fastened to the left of the case. Holes are drille main one by means of four hard-rubber instrument panel for the transi rods, % in. in diameter and 21% in. long. which are screwed to it upside These are drilled and tapped at each end These are grouped as shown in the for small machine screws, which bind of the bottom of the set, to get the them to the panels. The rods can be close as possible while preserving th« seen clearly in the photo showing the out shown in the circuit diagram; “works” removed from the case. The permits the leads to be made short, socket panel is 12 by 2% by “6 in. in di- is necessary for efficiency. The mensions. It is advisable, before begin- frequency transformers all have the ning the actual construction of the set, ratio—4.25 to 1; the _ radio-fre to study the diagrams carefully and to transformers are the Acme types R note the position of every instrument. A and R-4, which are specially desig: good deal of trouble was encountered in circuits of this character. the lavout of the original set, and, while The fixed condensers are of the this is now worked out for the reader,a type. One .00025-mf. condenser little study will make the job of mounting across the secondaries of each of th: the instruments much easier. and second audio-frequency transto1 The instrument panel is made of formica and one .002-mf. condenser as a b or bakelite and is 17 by 6% by “%e in. in for both high and low-frequency cur: size. The holes for the tubes are 14 in. to prevent howls and _ high-frequ in diameter and are easily laid out from losses. A .005-mf. condenser is cont the small panel. A combination rheostat across the phone or loud-speaker jach and potentiometer is mounted in the back . connections must be carefully sol right-hand corner; this controls all tube using small copper or brass soldering 1

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POT-RHEOSTAT ONDENSERS .00025 » ?) ( - > TRANSFORMERS RATIO.4.25-1 7 IST-STEP R.F. 2no. STEP R.F TRANS. TYPE R2 TRANS, TYPE RS TUNING CONDENSER .OOOS MF. a od LOOF J - COILS Wiring Diagram of Portable Reflex Receiver; Note How the Dr y Cell A-Batteries Are Mounted So That They Can Be Re- iE t dy the Wiring of Rheostat OR HONEYCOMB A-BATTERY 3-22%-VOLT B- BATTERY UNITS a " FIXED COND. ~ .002 MF. FIXED COND. .OOS MF, a ae am, a h JACK PHONE OR LOUD SPEAKER

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POPULAR MECHANICS the instrument terminals. Acid tom stick of the loop with a woode re solder must not be used, as there is The loop is now ready for use, rer of corrosion, leading eventually to nply plugged into the lo jack o1 > resin-core solder, ‘1; this allows the loop to be tu Set, Showing A and B-Batteries in Place and with Loud-Speaker Plug In, but without op, Which Is Plugged In at the Right * n any direction for | ' Food con ation, while maintai1 short as tion. \ new and er’ 14 or 16 ot increasing the rat ith a-good a small loop is to l-cambric tub- annunciator wire: “spaghetti” tub- ing of the room i *s varnished with is used, or on the \ lampblack, which a1 or 2-turn loop and connect a “mysterious” leak- variable condenser across tl! he instruments in of the wire. The large loop | functioning. pick-up than the small one, very easy to make, and the’ pling between it and the small given should be followed tached to the instrument is so loose obtain the best results. Ps very close tuning is possible. Whet d soldered in the form of a large loop is used, tuning is done , or a brass-pipe cross fitting, if this both the condenser on the instrument ve obtained, is used for the center; the one on the large loop. dowel stock is used for the arms, For use with a regular aerial long. A spreader ground, the instrument is fitted witl cell v % bv “e in. in size, 50 or 75-turn honeycomb coils. A stati »wed on the end of each arm. and 10 ary and a movable mecunting for the c f No. 18 flexible annunciator wire are fitted to a bakelite strip, 6 by 3 by wound on the loop. The ends of the wire in. in dimensions. An ordinary are brought to the terminals of acommon plug with screw connections is used phone plug, which is fastened to the bot- the fiber or bakelite shell threaded — I MATERIAL LIST ] 1 .0005-mf. variable condenser. é wW02Z5-mi. hxed ondensers, mica type l, 1 .002-mf. fixed condenser, mica type dimensior 1 .005-mf. fixed condenser, mica type bber rods, 2% by in 2 single-circuit jacks. kets 1 detector, synthetic-mineral type nstormers, ratio 4.25 to 1 3 B-battery units, 22 volts, small type 2 flashlight batteries, French No. 102 g posts 1 3-in. condenser dial. potentiometer and rheostat 4 UV-199 or C-299 tubes | lle f. transiormers, Acme R-2, 3 and R-4. ed-cambr tubing inner re, wood screws, termit flat ra ) bz rv connections

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POPULAR “MECHANICS 1023 ength to go through the strip radiophone’ broadcasting stations and two pipe nuts to fasten it commercial wireless stations in the world lwo binding posts are mounted — will radiate in years | of the strip and the connections Unusual weather conditions cannot be erial and ground taken through explained through any agency produced to the secondary coil. The plug by man; we seek a reason through some ected to the primary coil. This de phenomena we do not understand, and lugged into the loop jack when choose one that offers the least resistance red to use a regular aerial. to the popular mind id of the loop, a small honeycomb n be plugged into the loop jack, and . ufficient to bring in near-by broad A Thirty-Cent Radio Set stations on a loud speaker, but the \t ; ; : the cost of only thirty cents, the the loop described is, of course, . : radio set shown in the photo is doing day and night duty in the elevator-contri room of a skyscraper. It was made from a sawed-off curtain pole, wound with wire to form an inductance, and nailed to a baseboard; a sliding contact was arranged for tuning. A simple condenser, consist ing of sheets of tinfoil flattened and held Unusual Weather Conditions in wax envelopes, an ordinary crystal de Not Radio Fault unusual weather conditions prevail- his summer have been attributed to » broadcasting, by someone with more in all cases. best tube of the four should be used socket nearest the loop jack; this mportant stage of the instrument perator will be able to select the best r this position by trial authority to speak. This idea seems e spread pretty generally over the ry, and, ridiculous as it is, the idea lies a new goat on which to blame the her conditions dio broadcasting is a new science, there are many unsolved mysteries to be clarified by time and experi- e; this makes it very easy for the semi- entific analyst to make sage announce- nts that will not hold when viewed in light of truth, with reasoning based common sense and a knowledge of the nciples involved. lt is a popular belief that a large amount electrical energy is released by the erage radio broadcasting station. This it the fact. We will consider the 500- Receiving Set Built at Cost of Thirty Cents and Using tt station; one flash under a trolley Ordinary Telephone Receiver eel, lasting .01 of a_ second, will ease more power in actual electrical h-frequency radiation, than the average att broadcasting station will in one ir of continual operation. very arc light in the streets. or an arc such as used in the moving-picture The C or bias battery is a very useful lustry, radiates many times as much adjunct to the audio-frequency amplifies rgy as a 500-watt broadcasting station, as it not only improves the operation of it is the same type of radiated high- the set but also reduces the drain on the juency energy used in broadcasting. It B-battery. However, if the B-battery has lain to see that radio furnishes a very a potential of under 45 volts, the C-battery ll part of the high-frequency energy is unnecessary; for a 60-volt battery the ming around in our atmospheric en- C-voltage should be about 3 volts, and for ope The average flash of lightning a 90-volt B-battery the C-battery should veen clouds and the ground will have a potential of 4% volts, and be con ite more energy than all the combined nected with the negative toward the tector and a 75-ohm telephone receive: completed the outfit. Using a C-Battery + it

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POPULAR MECHANICS Above, the Latest Novelty in Savings Banks; a Complete Cryst Detector Set Is Mounted on the Bank, and Has a Range of F Miles. Center, Here Is the New Radio Stethoscope in Acti This Enables Any Number of Doctors to Listen to a Patient Heartbeats at Once. Below, a Scientist of the Bureau of Standar with the Wavemeter Used as a Standard to Adjust the Instrur Used to Transmit Radio-Frequency Signa's nNe Lower Phot opyright, Henry

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POPULAR MECHANICS Above, the World’s Smallest Loud Speaker; It Weighs Only Seven Ounces, but Works Perfectly. Center, the Babies’ Band of Immanuel Sister- hood, Which Has Delighted Thousands of Radio Fans; the Oldest Is Only Seven and the Youngest Three and a Half Years. Below, the “Solemn Old Judge’’ of WLS, with His Famous Locomotive Whistle 1 & Underwoo

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POPULAR MECHANICS French Engineers Produce the speed to a great extent. Howev: Novel Loud Speaker such a small motor can be used if it fitted up as shown in the illustration. lhe object shown in the photo looks at A thin mica disk, about 4 in. in diamete; first glance like an accordion-pleated fan, with a number of 3¢-in. holes drilled ut it is really a new and very effective equal distances along the edge, is fitt form of loud speaker, designed and built on the shaft. If it is impossible to di: bv French engineers. Radio engineers holes, notches cut in the edge will do iy have long real- ized that the horn type ot loud speaker as far from satisfactory, al- though it ap- parently gave excellent re- sults. It lacks the ability to reproduce both high and low * “ readily revol Irequ encies — : : the ith equal A Loud Speaker That Revroduces High and Low Notes with at a speed } as well. T electrodes, from a wet-ce battery zinc are mount on a piece bakelite hard rubbe and supporte in the positio indicated lr} motorca mica d tonal qualities, Equal Clarity most equ; ind it may its norm eventually be displaced by the tvpe shown, speed under no load The wiring diagt M hich, it “overcome Ss all the disad- of the spark coil, aerial and eround ’ The loud- shown.—E. J. Bachman, Fullerton, 1 is connected by means vantages rt the her type. 1] pleated paper actual diaphragm Battery Tips notes on a piano Use instrument which the ordinary loud speaker loses are, it is claimed, repro- duced beautifully with this instrument. a battery of a size adequate to needs of your particular set. It is possibl to get results from multiple-tube appar tus with the smallest size of B-battery, bu the experiment will be costly because the rapid depreciation of the current su ply and the consequent need of frequent \ considerable amount of energy is renewals. The number and type of tube ordinarily required to revolve a heavy as well as the range sought, should dete spark-gap rotor. A small dry-cell motor, mine the size of the battery required. Be sure that the B-battery is not co nected to the A-battery terminals, as t! tube filament is designed to operate or low voltage, whereas the voltage of t! B-battery is many times that of the fil ment-voltage rating. OR HARD RUBBER , Use no more tubes than are sufficier BATTERY ZINCS <2 RCRA for the results desired. It frequently ha; Small Rotary Spark Gap

y ens th: inexperienced operator DRY CELL . I at perienced operators eons é | have more tubes burning than are nec« _ sary, and then detune to lessen the volu: of sound. For local stations, for instan: the first audio stage is ample. Burn your tubes at the lowest point ) compatible with good reception. Exc MOTOR Z filament current not only drains the bat MICA DISK ---- \\ teries unduly, but reduces the life of tl Spark Gap Made by Mounting Thin Mica Disk on tubes. Once the rheostat is fixed at tl Shaft of Dry-Cell Motor proper point, it should not be touch again. Turn off the filament the mome: which runs fast enough for the purpose, you stop listening. Current is flowing cannot rotate a flywheel without lessening long as the filament is lighted

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Shop Notes published in 1923, in book form—Fifty Cents—from our Book Department How to Make a Fireless Brooder By J. V. ROMIG he first and most necessary to have after chicks have been purchased is a brooder. The er starting in can save consid- se by making his own; the is not by any means difficult, at all handy with tools can ficient and creditable piece i bv proceeding ac £ to é a -cordi1 1) 7 hi rtic i i < Lit tructed Br Type s Fireless

The brooder is of the fireless type. in which use is made of the principle of con servation of body heat rather than of plying heat from an outside source is effected by the use of a hover which is hung with canton-flanne! under the folds of which the bab ens can nestle. It can be used bo and outside, but it is preferable to for the first ten days of the chick +

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1052 POPULAR building, after which it set out in the open. ( Nd packing-case 1 warm may be boards of l-in. thick- ness can be used for the sides, bottom and roof, and if the tongued and grooved variety so much the better rhe outer housing, or frame, is nailed together as shown in the detail drawings, and then short ] drilled with a number oft ‘-1 they are of of board are n. holes and nailed inside of the prec es across the corners of the housing i+ CORNER BOARDS WITH -X HOLES FOR VENTILATION MECHANICS pivoted covers fitted over them will enter through these holes colate through the holes in th: boards and in the hover board, ve the inside of the canton-flanne! enough to brooder thoroug strips should | rest on the _ bottor brooder. it a direct draft cant through it In warm weather can be lifted and blocked up, more air to reach the inside of the so th RUNWAY RAISED WITH NURSERY YARD 76 X 9 DOORWAY f FOUR ROOSTS, TO BE USED AFTER HOVER IS DISCARDED ." CANTON FLANNEL * o< {I

FRONT ~~

SIDE VIEW VENTILATING H

CANTON-FLANNEL "HOLES FOR 2“ - < VENTILATION STRIPS NAILED TO BOARD AND SLIT EVERY 3” CONSTRUCTION OF BROODER Detai.s of the Homemade Fireless Brooder:; DETAIL OF HOVER BOARD Note the Hinged Runway, Which Serves as a Nursery and the Roosts for Use When the Chicks Outgrow the Brooder Around the octagonal inclosure’ thus formed, a strip of heavy canton flannel is tacked, the tacks being driven around the upper edge. This strip is then slit every 3 in. nearly to the top edge; it should not be tacked completely around the inclo- an opening being left at the back, where the door is cut in the housing. The hover board is made slightly small- er than the inside of the brooder, so that it will rest on the corner boards and can be easily removed for cleaning. It is 30 in. square, and 4%-in. holes are drilled in circles through it, as shown. Strips of canton flannel are then tacked to the un- defside, so that a circle of holes will come between each pair of strips, and the strips are slit every 3 in. in the manner previous- ly described. Two 1-in. holes are drilled in each corner of the housing, and little sure, As the chickens grow taller, blo be placed under the hover boar commodate them. After they grown the necessity for the broo hover board is removed, and a i roost substituted. A 6 by 9-in. opening, fitted with is cut in the back of the broode: and a runway, the full widtl brooder. hinged just below the d can then be raised when the ch too small to be allowed to run in t and surrounded with chicken net form a perfectly safe nursery yard @A convenient bench knife ca: from the broken blade of a jack flattening one end of a piece of bt of suitable diameter and blade into the flattened end. solder

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POPULAR MECHANICS 1033 Stop for Radial Drill any kinds of work the stop shown lrawing is a real timesaver on a ill. With the aid of this device it ile to duplicate double holes in any of pieces with the same as by using a jig. The Water Heater for Contractors Che drawing shows a novel and service- able heater for running water, that will prove useful to contractors who have to heat large quantities of water for concrete Novel Contractors’ Water Heater required are a ptece of That Is Inexpensive to Make and tock, tapped at one end to Convenient to Move nto a bolt in the T-slot of table, and fitted with a at the other end. The s tapped on opposite sides crews and a hole is drilled it to take an auxiliary so made of round stock and i hook shape as shown, to he handle by which the rm is swung. The parts sembled as shown to the the illustration. stop was used successfully production of a number of requiring two holes, the of which had to be located alike in all the pieces. The ment of the stop was made ows: A sample piece with lready drilled was bolted e By swinging the drill ickward and forward and ning or shortening the iry arm, the drill was made p over the holes as the drill reached the end of its swing ther side as determined by top. The sliding auxiliary ind the saddle carrying the spindle e then locked, and the work was ROUND PIECE TAPPED TO .. RECEIVE TEE BOLT ' / ‘ ce on a Radial-Drill Press Allows Duplication of Holes as Accurately as with a Jig ed and reamed with very accurate ults—Harry Moore, Montreal, Can. or plaster work. The heating unit con- sists of a number of lengths of pipe con nected with elbows as shown, the bottom end being connected to the water suppl) and the upper end having an extension with a faucet attached. A fire is built in side of the coil and this heats the water in a short time. This heater is inexpensive to build and is light in weight, so that it can be easily moved about from one job to another. Filling In Broken Enamel Fine sealing wax is good for filling in cracks or broken spots on enameled sur faces, as it hardens at once, takes color without absorbing the oil and does not shrink. Use a wax of the proper color to match the surface to be repaired, fit it in, and smooth the surface down with a hot palette or putty knife. Give it one or two coats of color to make it match the re- mainder of the enamel exactly, and then varnish.

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POPULAR Tray for Beeswaxing Screws Woodworkers and others who are accus- tomed to dip wood screws in beeswax to make it easier to drive them into the wood, will appreciate usefulness of the dip- TRAY,! DEEP RIVETED | SCREW DIPPER Handy Dipping Tray Be Wood and Dipper for Screws swaxing ping tray and dipper shown in the draw- ing. The tray is made of sheet metal, bent over and riveted so that it is 1 in. deep, and stands on legs about 6 in. high. The wax is placed in the tray and melted by means of a Bunsen burner or small alcohol lamp. A dipper is used to hold the screws: this is made from a piece of sheet metal, having a number of slots cut to form tines, which hold the screws as indicated in the detail. The screws are picked up simply by running the dipper through a box of the screws.—Vernon F. Clayton, Detroit. Mich. Worn Paving Brick Make Manholes Bricks from worn-out street pavements need not be hauled to the city dump as worthless. They can be used in building For this purpose discarded bricks are just as good as new ones, be- cause, in manhole construction, the spaces between the bricks, no matter how ragged, are filed with cement mortar. Such man- holes will obviously cost much less than those built with new brick or concrete, and are practically as durable-—Ivan E. Houk, Denver, Colo. manholes. MECHANICS Testing Crankshaft for Cracks When overhauling the engine it sirable to examine the crankshaft cracks. Some cracks may be visible t eye, but in most cases a crack is to to be seen, yet, if ignored, it will grad increase in size until the shaft hence the importance finding cracks. A simple method of making cracks visible is to suspend the shaft one end by means of a rope and ther the crank cheeks in turn a with a hammer. The vibration force out of the crack and the fine oil line is distinct on the clean face of the shaft. Any crankshaft f to have a crack in it should be discat bre of hart Sharp shadow oO Cutting Circular Holes in Sheet Metal It is often necessary to cut circular | in instrument boards for speedomet clocks, etc. This cutting cannot be d very well with an ordinary saw, and the fore the circular saw shown in the ph ‘aph was made. It consists of a hacl to the edge ; piece of wood, and the shank of a1 drill bit. The piece of wood is tut down to a suitable diameter and wide, with a boss about 1% in. in diameter in which the drill shank is pinned. The mate- rial should be hard- wood, such as oak, as it must withstand con- siderable strain. A thin, flexible hacksaw blade is bent around the edge and both ends of the blade are cut off so that the ends fit together exa The temper is taken out of the blad« several points, about 2 in. apart, so screw holes can be drilled throug! Small round-head screws are used to ten the blade to the disk. A hole is d1 through the center to receive the shank, or a similar piece of round about % or % in. thick and 4 or 5 in The shank should project beyond the teeth so that it will serve as a center g which is inserted into a small hole d: first. A ™%-in. hole is drilled through boss and shank, and a nailis driven thr to serve as a pin, the ends being flatt to keep it in place. By grinding number of the teeth at intervals alot edge it will be easier to turn the tool must be used in a hand brace or d1 screwed ot a cire

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POPULAR MECHANICS 1035 Brake for Shop Trucks yading hand trucks with heavy usually necessary to slide them truck, and the latter must either another person or the wheels with blocks to keep from moving. Recent- plant fitted the shop a brake as shown in ng, and the truckman is to load it alone without tachment is easily made; hinges are fastened to ide of the truck in front ear wheels, one end of e being allowed to hang he loose ends are con- a strip of heavy sheet ich is fastened to them s. Inthe center of this veted a V-shaped piece to act as a catch for a ound rod which is bent e axle of the rear wheels. of the rod between the he V-piece should be so it it will tilt the loose the hinges a trifle for- ding their lower ends floor. At the other lindrical weight is driven on When the truck is to be load- eight is lifted with the foot, which ie hinges to drop into contact floor. The truck is then given ird push, causing the hinges to ip against the rear wheels and raise ittle, so that the truck is securely Harry Moore, Montreal, Can. + ~ a WEIGHT Ke ti V-PIECE } Mh f ’ on Factory Truck Enables Worker to Load It without Blocking Up the Wheels Cattle Guard Made of Cactus A section foreman on an Arizona rail- road conceived the idea of using cactus plants for a cattle guard at railroad cross- ings. The first one he built proved so Arizona Railroad Uses Effec- tive Cattle Guards Made of actus successful thi » railroad con cided to use his method exclusivel) guard consisted of a wooden ft by 6-1n. material under the t S shown in the drawing In this boxlike structure, sand and gravel were placed to a depth of a few inches and the cactus planted in it. As the cactus used for this purpose grows in abundance along the railroad these guards cost nothing outside of the wood and labor to construct the frames. That it is also efficient is shown by the fact that during the first six months not a single animal attempted to cross it Both horses and cattle in this region are familiar with the sharp thorns of cactus and avoid it as they would a rattlesnake.— Robert H. Moulton, Chicago, II! Keeping Record Map Up to Date A wall map in the office of an electric- light company was used to indicate the changes and extensions in the overhead lines. It was at first found difficult to make the alterations on the map satis- factorily, but all trouble was overcome by placing it in a picture frame having a glass front and indicating the changes on the glass with various colors of water- proof ink.

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1036 POPULAR MECHANICS Movable Workbench [n an automobile repair shop in western Maryland the writer observed a small re pair table, made from an old steel oil drum nd mounted on casters so that it could be BARRE coy! Sturdy Workbench Made from Oil Drum and Mounted on Casters moved about \ wooden top Was bolted on the drum, and on this top a small vise and hand grinder were mounted \ semi circular opening was cut in the side of the drum so that oilcans, greasing equipment, waste and various tools for tire and other repair work could be stored when not in use. Casters were riveted to the side near the bottom, as indicated in the detail. Obviously, the use of this table saved many steps to and from the workbench and thus eliminated waste of time It was possible even to put an engine on turdy table and move it to another section of the shop.— \. Luers, Wash ington, D.C Efficient Drawing-Pen Cleaner Drawing pens and pens on compasses can be cleaned easily with an ordinary pipe cleaner The cleaner is bent to form a loop, the ends being twisted together and inserted in an improvised handle. The loop is brought close together and passed between the jaws of the pen. Such a cleaner is inexpensive and will not injure the most delicate pen Making Small Laps Where tubing is ave‘Jable, it mak: good laps, but few shops Carry a of tubing in all sizes, and some 1 have it at all. Good laps for bushings and similar work, howe be made of cold-rolled steel or di ‘which comes in all sizes, and can be found in any shop. The rod is lengthwise down the center, and ad by spreading the ends apart Safe Ladder for the Silo Most silos have an inside ladder many have one on the outside, alt the necessity for one here is sometime as great. In case the silo is made ot concrete blocks, a neat and durable | can be built integral with it on the outside or both. The rungs are made a number of lengths of S*-in. iro bent to the shape shown. These serted between the blocks, whi grooved to receive the rungs snugl\ ends of the rungs are bent over int hollows of adjacent blocks to pi them from being pulled out, and the 1 themselves should extend out far e1 to offer a sure foothold even whet shoes are worn. A sufficient numl courses of blocks at the bottom mig Steel Rungs in Silo Wall Make Strong and Ladder laid without rungs, to prevent yout! vestigators from climbing the ladd«

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minnie W. SAZMON AM. SOC. NAVAL ENGRS. jector is often a very useful device as far as possible. Fig. 2 shows a home nd about ships, as it is about the made ejector of a type often seen; some e that the .ship’s crew can times it will operate and sometimes not, . short space of time that will depending on the conditions under which large quantity of water. Every it is tried. Its principal faults are: The engineer should therefore know steam jet is not of nozzle shape; the water bout it as possible, particularly 1s not properly guided and meets a sudden st to construct one out of pipe obstruction at B; there is no throat at gs and use it to get the best re- nor recovery cone at C, and no relief he writer has found such ejectors starting at D. In the ejector s alue on many occasions, and Fig. 3 some effort has been made to p1 the results of his experience in vide a throat at A by using a nipple ot ed torm smaller size than the ejector body, fitting perhaps best 1 ‘ommence with a the nipple by means of the bushings and t} ription of the theory of the C, but this usually resu ctor, and so in Fig. is shown a nozzle being much too long elementary pe he water “am and water losses. 1 he ejector at A, and passes to the to about all the criticisms dit a spiral so that the stream hat shown in Fig. 2, but it will be easy and the angular deflec- lrive out a little water against a- hig! ill, thus keeping the chavuadic loss head than Fig. 2, and so it is often used ¢ he incoming a makeshift. Fig iccelerated , hows an ejector narrowing — tmet can BE e until it at- : i made of practically ts maximum — | ee ||| the same material ity in the | i ti as that in Fig. 2, but B. The par- which, experience ‘ has shown, is about { the con- a DISCHARGE —” team enter z as efficient a device iter at this ; ~ieniten sane as can be made wit! nd impart to pipe and fittings e portion of Fia.! The steam nozzle energy, after Drawing Illustrating the Principle of the Ejector is hammered or the water swaged a little to at a decreasing velocity until it ward the proper nozzle shape, smoothed es the normal pipe section at C; at out on the inside with an improvised ream ime time the pressure is increased. er, and turned, ground or filed on the out ings to strive for in the design are: side (to lessen the draft or wake in the ave the water enter with the least passing water) toa thin edge, say ‘42 in. for or eddy loss and with the least sur- the smaller to 46 in. for the larger nozzles skin loss; to provide just sufficient [he water passages can easily be made ising surface on the steam nozzle; to the shapes indicated at A and B with id all sudden changes of form inthe zinc, white metal, solder, babbitt, or even to get the water column back to’ lead. To make A, screw the steam nozzle il velocity at C in the least practical tightly into the galvanized-iron plug C nee,;and to prevent radiation losses and mold A to the shape desired with

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POPULAR Paris, sand or even clay. As this is hard, use it as a pattern and make a mold in sand, or whatever is available, with a regular cope and a runner or gate Open the mold, take out A, C and D and remove all the plaster or what- ever was used to form A; then clean the surfaces of C and D well. Fill the inside of the nozzle with sand, rammed hard, to prevent of the metal from running into it, see that the mold and cope are in Food ord Se put in C and D; then put on the co pe pour. lwenty minutes’ work will make a good cast. To make the throat piece, drill a few in a 1 SOON aS any 4 DISCHARGE > B Cc ‘a 1} “y ] f ri STEAM INLET e and WATER INLET gal- vanized nipple KE to hold the fitting securely, and turn or carve a piece of soft wood to form a core for the throat. The cylindrical ends should fit the nipple eas- ily, and the core should be cut intwoand thetwo halves daoweled together with a nail, as Shown, to permit withdrawal. Place the core in po- sition in the nipple, first coating it with paraffin or grease, and, through the holes in the nipple, fill the space between core and nipple with plaster of Paris. When this withdraw the core, and the nipple used to make a sand core for the actual casting. This is done by cutting some small disks of paper to fit the smallest part of the throat, slipping a wire nail through the center of the disks before they as a dowel Is holes WATER INLET Fic.4 Figs in Use; Fig. 4, Construction of has eft can now be are placed in position, to act for the The sand rammed in ends until the nipple is well filled, then withdrawn and dried thoroughly. Remove the plas- ter from the nipple, clean the inside sur- face well, replace the dried core and bed the whole nipple in sand, with one of the holes up. Pour through this hole the bab- bitt, or whatever else is used, and, when cold, remove from the sand and clean out sand core from |} now oth WIRE-NAIL DOWEL 2 and 3, Types of Ejectors Frequently Met, but Inefficient MECHANICS the core. All this can also be done ir twenty minutes to half an hour. times only include working tin course; in addition to this it may re several hours to dry the sand prope order to prevent it from “blowing’ the hot metal is poured into the Zinc is much more likely to bloy white metal or lead. Four tablespo of mola sirup, mi 5 [ ] in @ cut | water, al —— ed to : fine, dry will erally mak ¢ good COT : DISCHARGE _STEAM INLET Cc sand n- a good ing d this work either of t! ingredient not at one teasp ful of fiour mixed pt. oT \ and id heated ut boiling answer same purp a short pie broomsticl the butt e1 a marl makes a rammer. ejector will deliver from 40 to 80 time square of the water-pipe diameter in « feet per hour, or from 300 to 600 time square of the pipe diameter in U. S lons per hour. Commonly the suctio1 discharge pipes are of the same size the smaller sizes, the diameter oi steam pipe is half that of the water pi 2-in. steam pipe, however, is large e1 for a 5-in. ejector. The ejector should be expected to deliver against a head—probably not over 2 piping the discharge like a siphon, static head can be cared for over a rail of from 40 to 50 ft. above the level. There is not much reliable data the steam consumption of such eject but from experiment, it appears re able to expect that they will use ab to Me the weight water tl when not immersed in water thems discharge water will general! san WATER INLET Fic.3 DISCHARGE 4 ~ RELIEF _ OUTLET = [bh ee ee | | dln , a fo ae WOOD CORE FOR THROAT ariit Ejector Made of Pipe and Fittings 5 ft.—but of of 1e\ The count for about 98 per cent of the lh:

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hu iter liited a gi t, is rather | lo get the not be subme | ir the surtace ] itis often otf adv but the useful POPULAR work done, in en number oft yw per pound ot best service, the rged, but should ot the water as intage in start tion of the ejector to have a provided, as s] rated by a rod of the rod te: h should be of ipe. use when the ered into a comp re used at B an ng and repairing. ire best to use; 1 E, and the ) are screwed cross below nd are placed ingles to It is desirable standpipe G, | ent the end of SVIDE EYE ~ u ' 5 a good piping iown in Fig. 5. so arranged that ids to shut the the same size as arrangement is whole unit has artment or hold. d C to facilitate Four suction two are shown _£- NOT LESS THAN 6 WATER LEVEL, NOT LESS THAN = 12” ‘ TOTAL ABOUT 200 HOLES, EACH % DIAM. Fic.5 / MECHANICS 1039 the suction pipe trom being lowered into mud and stopped up quickly. There should be a total of about two hundred 3-in holes in the five pipes; this will give a ratio of hole to pipe area of about 3 to 1: more than this would be better, a1 d each hol should be countersunk with the a ¥%& or %-in. drill. The steam and discharge pipe be clamped together about ever simple and good way of doing thisi in the upper detail. For temporary ser\ ice, a wood block has been found satisfac tory as.a separator, if made amply large, cut to fit the pipes roughly, and provided with a piece of asbestos under the steam pipe. As an example of the practical ap plication of the principles described, let us assume that we wish to remove water fs) Method of Installing the Ejector Shown in DESIRABLE Fig. 4 to Insure Best Results ye _ LEVEL as rapidly as possible from a hold, keeping the water down against a leak that is estimated at about 100 cu. ft. per hour as the maxt mum. We have on hand some 3 in. pipe and fittings; what can we do? Under favorable circum stances we may expect an ejector made of this pipe to deliver from 360 to 720 cu. ft. per hour, accord ing to the rule previously given, so we proceed to make up the ejector, using a 1%-in. steam pipe and the same size of relief cock Chis ejector will then gain rapidly on the water

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1040 POPULAR MECHANICS Tilting Shaker for Sand Screen Keeping Grease from Auto Brake Screening f sand for use in concrete Having grease flow out of tl on small jobs suallv accor iplished with ential on the brake bands is object a small I held and shaken by hand. in that it is difhcult to clean off ill the dirt and dust and may pre brakes from functioning proper! trouble can be remedied by 1 pring washers that fit snugly o1 shaft. : These are congnt in the vise, o1 time, and the ends spread so as to steep spiral. They are then forced axle so that one end of each wa interlock with the end of the ne forma complete screw extending ; wheel bearing on each side to the « tial. It is necessary, of course, to the washers on the axle in such a m that the excess grease will be s¢ back to the differential housing, ar away from it—G. G.°>McVicker Bend, Nebr. Radius-Turning Tool Most of the tools or attachments forming of radii on the lathe are « cumbersome or too large to handlk diameters, but the tool illustrated is : as small and neat as it is possible t A Fixed Sieve That Hastens the Riddling of Sand on r ag nomen Wien he main body is made This process is slow and laborious, and a from soft more expeditious and less tiresome method steel. of the is to use a fixture of the kind shown in same size rc ~ FEED HANDLE as the illustration. the usual ither a round or square screen is lathe-tool adapted for the fixture, which is made shank, the simply by attaching two long handles to front end be- one end, and two “legs,” which are pivoted —_jng forged flat to two pieces of 2 by 4-in. stock driveninto = tu the ground. Two bolts form the pivots, and make the sieve readily detachable when necessary. TI tilting, which slides t to the other while d TOW plac ed undernea form the base of the : swivel head. sieve is operated by The latter gece vasD oh roe rom one end combines the SMOOTH ypping it into a bar- pivot, tool- A. hol «“ exten- sion-handle holder, setscrews Prolonging Life of Wooden Well Curbs 1" th pla wrt gga thing being worked out ol Wooden well cur are used quite ex- stock. The pivot stud is turned cor tensively in rural dis ‘ts lf they are with the tool head while the e air-tight or nearly . moisture arises dur- handle holder is turned eccentt ing cold weather and cause he curb to whole. A piece of %-in. rod mold and rot. One should, therefore, al- long is screwed into the upper en low the moisture to escape. This can be head and serves as a handle for tur done by cutting away part of the curb and device in an arc. The face of the | placing a screen over the opening, or if filed off flat and true and the dista: the curb has a lid, by closing this only face projects beyond the true loosely. It has been found that with should be marked with stamps. either of these precautions a curb ie last tance is then subtracted from the ra longer —Bunyan Kennedy, McCool, Miss. be cut and the result will be the = 1 } I r t 4 ( 1 ' I

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POPULAR ynd the face of hould be taper- seat as well as on ill | 1 the two together at nsion for easy turning and with- by a > 1 top ot e too reference to the should pass line as the regulation A tool of this type is a great when removed accuracy of the 1c undistut ed he same ] ; > ver L timesave as, e toolpost, the inforcing Corroded* Steel Tower ft. steel tower supporting a 20,000- at the oil mill of the Lookout Oil ning Co. at Corinth, Miss., became from that a collapse minent. The general manager, Mr. ynolds, suggested a plan of repair- tower that proved perfectly suc- and saved the cost of a new tower four main columns consisted of 7- rought-iron pipe, with mem- 3'%-in. pipe, spaced 12 ft. apart. forms, 15 in. square inside, round each column, with project- rms 12 in. square extending out on ss members for 18 inches. The were finished and the concrete in 12-ft. sections, care being taken he reinforcing iron lapped the points e pouring ceased on each section. ter the concrete had been poured, 10 ere allowed for it to cure, and, when rms were removed, the columns ysund to be perfect, with no evidence nevcombing. The completed job was perfectly satisfactory—H. C. Har- mn, Gen. Supt., Chattanooga, Tenn. corrosion crass were Se gee ae the Forms in Position; ower; Right, the Completed Job Center, a Portion of the MECHANICS Seam Folder for Tin Work of the sheet h worker is t . } yrether sheets tor rooting sh One of the occasi 1) equip in be purch wooo STEEL EDGE a = oe SHEET METAL- Simple Device Aids Sheet-Metal Workers in Making Seams in Tin Roofing this work, but the small tinsmith, whose infrequent use for such a device does not justify the expense of purchasing one, will find the rig shown in the drawing just as good for his needs, and its cost is neg- ligible. Two pieces of l-in. wood of equal size, say, about 10 in. wide and 3 ft. long, are fitted with strips of flat iron on one and hinged together with several fastened to the top. In use, the boards are placed so that the iron edges are over the open seam, as indi cated in the detail. Then the boards are pressed down by standing on them, and the seam ts ready for g A leather handle is attached to one of the boards, so that the “* “ moved from seam to seam easily. —G. A. Luers, Washington, D. C @ When a barrel of gasoline is al lowed to remain in one position for a long time, it frequently hap the last few quarts of contain sufficient water to cause trouble in the engine o1 The water can be removed large cotton cloth edge } hinges, ] solderi can be press stove. by dropping a into the gas and wringing it out The cloth absorbs the water.

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POPULAR MECHANICS water to radius of cCartry oO 100 ft sprinkler is move hand. or iv g ~ so core 1h) ; ” horse 1¢ five times a day, a proved eT. a real mon Geo. E. Bower condido, Calif. Brush Finish for B Brass and similar als may be given finish by rubbing with steel wool should be taken tl rubbing is done it direction, otherv cratched surface wi ult. A lacquer shou applied to prevent nishing. A thin solution of white sl in alcohol, applied with a brush, is factory for large work. Small piece be dipped in the solution. Keeping Paint Brushes Soft Everyone who has to do an occa job of painting knows how easily bri are spoiled by letting them stand in pots. To keep my brushes in good « tion without the necessity of cleanin drying them thoroughly every time | had _ finished eae — — . using them, | Huge Water Sprinkler Used by California Rancher obtained an a empty 5-Ib. tin can, originally used for car- bonate [ Huge Homemade Field Sprinkler A California rancher has improvised a of large field sprinkler similar in design to those commonly used on city lawns. It is built upon an old buggy chassis and is made of pipe and fittings picked up on the ranch. The sprinkler arms are 20-ft. soda; this can was about 5%4 in. in diam- eter and 10 in. deep. One lengths of l-in. iron pipe, giving a spread of 40 ft. and, ordinarily, a reach of 60 ft. The ends of the arms are bent in opposite directions and five small slits are cut with a hacksaw, at regular intervals, into the side of each arm. These slits are, of course, cut on that side of the arm toward which its end is bent, so that the force of the outflowing water causes the pipe to turn. The central support for the arms is made of 2-in. pipe and fittings, and the arms are braced by guy wires from the top of a smaller pipe, as shown. A length of old fire hose is used to connect the sprin- kler to the supply pipe from a power-driven pump. Sometimes the wind the inch below the top I punched eight in the side and inserted L-shaped len of wire, about 2 in. long. These | dered to the outside, with one end jecting inside of the can to form a | Through the handle of each brush I d1 a small hole exactly 5 in. above the bot end of the bristles so that these would touch the bottom of the can. After brushes were hung up in the can en turpentine was poured in to submerg: bristles and the cover was then put « prevent evaporation. In this wa) brushes were kept in good conditio ready for use at any time.—C,. E. W causes zahl, Syracuse, N. Y.

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POPULAR MECHANICS king Durable Valve Washers Getting Rid of Chinch Bugs number of years as a rail- Chinch bugs pro ceneral repairman I have seen most costly pests ble that was due to faulty season Damage lves, and in seeking a remedy, washers made of lead both durable and In valves tor hot or cold ise lead alone; for steam valves, of half lead and half new bab- hough lead alone will hold steam, he half-and-half mixture, as it rable. New babbitt is used be- bearings and the like are apt to bits of iron and steel. small ladle I pour the molten nto the washer cup of the valve; en the metal is cool, I level up the with a file. If the valve leaks tested, I take it out and file the on the side where the marks show bears heaviest. In this way one can 1 valve washer that will last” for , or even years. If there is no to hold the washer, the rim of the be dented slightly at the sides to in place.—Clarence Uplinger, Cin- Ohio. Hinged Track Section in Barn large western dairy barn, with sev- rain bins at one end and a double or track running from these bins two rows of mangers, the track over a driveway without leaving ent headroom for a loaded rack to under it. The trouble was readily yme by cutting off the sections of Dripping Creosote in Furrow to Protect Field from over the driveway and mounting Chinch Bugs; Cyanide Hole in Foreground on lengths of 4 by 4-in. timbers. e were hinged at one end so that they be swung entirely out of the way to the load to pass. When swung back | e ] 71 ° 1 Ot dollars was C% - in ne migration from wheat fields into corn, sorghum and other “row” crops. The bugs “marcl afoot” and methods of controlling them have been based on the establishment ot barriers to stop them from reaching thet objective. At the Kansas state agricul tural college various systems were tested last summer, and a combination of creo sote and calcium cyanide was found mo effective. “The creosote was a furrow along the side of the protected, and every few feet al turrow holes were dug in which flakes of calcium cvanide were deposited. Un able to cross the creosote line, the bugs s of Conveyor Track Cut and Hinged on End crawled along it until they reached a cya to Permit Passage of Loaded Rack nide deposit and were killed by the deadly) and low-lying gas given off by that sub the timbers are held in line by heavy stance. Barriers of calcium cyanide, with Dale R. Van Horn, Walton, Nebr. out creosote, were tound ineffective

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1044 POPULAR MECHANICS “Working Model” Aids Drawing Students’ wide, to one side of which is fast: frame holding a sheet of glass. Ths Drawing instructors often find it diff- is about 12in. high, and to one side cult to explain to their students how three top two similar frames are hing: different views of a model or other subject top one folding down against the s ; when the latter is brought against pe as ~ Eg cut in the base, thus inclosing the jection That Will on three sides. The obje a ers: block 2 in. square and 4 in ing Students supported on a wooden p f an Oblique angle to each « three frames or pla: projection. The p: tion lines are repress by small brass rods of which are fasten: each corner of the at right angles to other, and running t three glass planes each plane is dravy : accurate projection are projected par 4 the block by simply joining the | on paper. i wilt represented by the ends of the rods be The model +> the glass, and dotted lines running shown in the : oe these points to the edges of each illustra- * show clearly how one view is proj tion makes from the other. the task easy 5 The swinging of the frames int< and the stu- 4 }) plane puts the drawings in the final dents are en- _ tion required on a flat sheet. This 1 abled to grasp it perfectly simple to explain how the the principles of projection very quickly. ject is “swung” in the mind’s eye to ol Che model consists of a substantial three different views on the drawing | wooden base, about 13 in. long and 10 in. —Sherwin M. Turrill, Maywood, I! A Simple Recessing Tool or taper pin, as desired, provided that allowed freedom to move in the s! An easy way to make a tool suitable for flat spring, bent upward at each en recessing caps, shouldered nuts, and the fastened to the shank with two small s: like, in the hand screw machine is shown serves to keep the tool from floy in the drawing. The tool is made in two about. It can be seen that when the pieces, the shank and toolholder proper, driven into the face of the tooil the former be- reaches the face of the work it caus¢ ing turned to «£:. tool to feed inward and thus cut the r« fit the turret | lt is important when setting a tool « and the front 7 ZZ character to note that the tool tra end slotted We : little in a direction parallel to the b across. The {|W} the work after the pin touches the f toolholder is —— ! the piece. Consequently the tool milled across "oll: eos ZB be set so that it is a trifle away fror both sides, ZB back face of the work when the pin to: leaving a flat | WS the front face. When the tool has re portion which ll Dont x the desired depth of cut it wil fits the slot in traveled in a slight are and should theshank. The SLOT the cut touching the back face. front is bored —--- out to take the @Small articles, such as nuts and s recessing tool that have fallen into some inacc¢ and drilled at one side fora pin. The tool- place can often be picked up by me holder can be held to the shank by a screw chewing gum stuck on the end of a SHANK

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Getting the Most Out of the Grinder By G. A. LUERS scrapers vad er or othet anv mec! inic, » other hand, with tent, on the ation ¢ nuity, Ol pl sh real work the treadle in place, ! and get the utmost in service done that would be impos high-speed little tools. In the A common round w garage, where space is at fitted in place of the grin and where the purchase of mits the tool to be use idditional tool means a hardship as roughening tire casi the hand grinder may be made _ patching. Anyone hine of numerous uses and un-_ hold a heavy ca lue. brushing the inside thing to be done to increase preciate the saving made ness is to fit it with some kind of | temper by the use of the le leave both hands The scratch brush will al ” WIRE a” BRUSH CHUCK ON EMERY-WHEEL \ ‘ ' I] } ROUGHENING TIRE ul POLISHING HEAD WASHER fh 1/ OF PISTON FILINGA TAPER DOWEL PIN COMML TATOR FOR CAR \, Co BENT IRON PLATE SCREW-PLUNGER TYPE GREASE GUN \ DETAIL OF aca REFINISHING TOOL EMERY CLOTH Few Fixtures That Increase Greatly the Utility and Value of the Neglected Hand Em Save Time and Dollars in the Small Shop

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1046 Inv’ eng to be To a a Car,a ulmng Vv hee l ul Stil | wheel also mak possible give the Mhis tops of pistons and valves that fine polish that is in preventing the rapid accumul; In fact, the uses of the buffing wheel are legion around the shop and garage. If a drill chuck is used on the spindle of the 4 ge a surprising num- ber of jobs can be done with it Holes that are not required to be accurately located can be drilled, round parts can be filed to size, needle valves trued, dowels fitted, engine-valve stems polished —in fact, almost any work for which a small polishing lathe is commonly used. On one occasion I saw a car owner true up the commutator segments of his gen- erator by means of the chuck on his grinder and a small improvised end sup- port. If a small split wooden pulley is so effectiy ition of carbon oft SMall small Simple Brake for Hand Hoist The illustration shows an unusual hand hoist construction, which has a self-lock- ing brake. The drum on which the ‘voist- ing ropes are wound is turned down to two diameters to obtain greater leverage, the rope to the load being wound on the smaller section and the pull rope on the larger. The load rope is attached so that il tomy H 3 ’ we! FRONT VIEW - re a ROPE TO LOAD RELEASE ROPE ™ > PULL ROPE | END VIEW | + BRAKE ->++4 ii BRAKE ROD __ — ns P, a, Wt BRAKE LEVER Unusual Type of Hand-Hoist Mechanism Which Is Equipped with Self-Locking Cable POPULAR MECHANICS spindle and mounted on the | lowe! left shown at the 9 beco1 1es an Casy mat the inside of ll prings tions of fe e with very Ford commut aced between t and the surface i This has been useful in a Ford service stati the same at the right. This piece of sheet steel or iron, bent shape, and drilled at the bottom “U” to fit over the spindle of the gr It is a tiresome job to unscrew the of a large grease gun by hand for ret but by placing the end of the plung the U-shaped ch nen and grinder, the plunger is few seconds. The examples of the many uses to which the grinder can be put in the small s] mechanic can think of increase the are pl emery nd the device consists mere! shop is fou running turned out shown are merely many utility of a little-use it will be wound up when the drum tated toward the right, as indicated arrow in the center figure, and th: rope is attached so that it will w hile the former is winding, and vice \ The drum held in a steel frame o type shown at the upper left, slots used for bearings to permit a slight movement of the drum, which eng: with or releases it from the brake art below. The bearing slots are incline that when the pull rope is unwoun shaft climbs up the slots, — drum from the brake. On the othe the shaft runs down the incline of the the moment the pull rope is let go a1 drum is held securely when it rubs ag the brake. The brake, brake-rod brake-lever assembly is shown in the | detail. It is attached to the frame the center of the drum so that the works against the larger section. pieces of angle iron are fastened t fri sme to serve as guides for the brak a short coil spring is attached to the and brake lever to hold the brake t against thedrum. A small bracket t: the brake lever is cut, and bent to the shown in the right-hand detail; it tached to the underside of the frame the brake lever is pivoted on it. A attached to the end of the brake lev« ables one to release the brake. @ Burnt umber with white and o1 chrome yellow will give a variety of warm drab colors.

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POPULAR MECHANICS Tying Bundles of Wall Paper In order to tie up bundles of wall paper d yet, when examined, no per- quickly and conveniently,a dealer provided play may be found in it. In such _ the novel holder shown in the photo and e connecting rod should be held drawing. It is made of wood and has four and the piston rocked up and arms extending from the top Rolls of he plane of the wristpin. Finding Loose Wristpins tpin may be loose enough to e Im comes and goes be- e pin and its bushing the o loose, and new pins and must be fitted. The old may be reamed out and pins fitted, if desired. Blanchard, Tuckahoe, N.Y. ixiliary Wheels for Barrow certain purposes, such as ng cuttings from the floors ps, and similar work, a pair | auxiliary wheels added to op wheelbarrow will prove practical. arrangement enables the to slide the barrow from ne to machine as desired, the ease of moving a three wheel truck, yet when the is full, it may be lifted and rolled wall paper are placed in the space between in the usual manner to the yard, these arms, and it is then an easy matter it would to tie a cord around the rolls and make a rough passageways where it This method was found much possible to handle the ordinary truck. bundle. h moves the barrow several feet, better than rolls while attempting to tie them up Charles A. Goddard, Los Angeles, Calif. the usual one of holding the Testing Fit of Rod Bearings When adjusting a connecting-rod bear- ing (with the engine in the car), the sim- plest way to determine when the bearing is just tight enough is as follows: Remove the cap until the rod is ju hand, shims or file t too tight to be moved lengthwise by but not too tight to be shifted slightly by tapping with the hammer. Repairing Leaky Spark Plugs Spark plugs having a removable center wire sometimes leak compression at this point. Often the reason is that the in sulator has chipped away where the flange ; on the wire seats against it This trouble , — - meant - — Lighten = can usually be remedied by slipping a thin hiea , brass washer, of the same kind as that used on top of the plug, over the center t be lifted to move it. wire and drawing it up against the porce- lain. As such washers are too large for must first be trimmed down Gunderson, Jr., le without the small wheels the handles this use, they with tinners’ snips EK. T. € A non-magnetic cast iron is being pro- Humboldt, Lowa. ced by a concern in England.

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POPULAR Efficient Film-Drying Cabinet hown tn the il tru ted, and a anyone i

y - rong » _—Z a “ GAS PLATE / by SLID! J y LIDING DOORS MECHANICS the cabinet to hold the bottom Holes are cut in the top and botto the cabinet, as shown in the drawir receive the ends of lengths of stove he upper pe is led outdoors, ar ’m one is connected by means couple of elbows to an ele ian. A vas p! ite is set belo hottom pipe, a little away fror cabinet, to heat the air as it p through. The upper ends of films may be attached to the c1 strips by means of thumbtack the strips may be provided nails on which to hang reg film clips. A number of film ¢ each pair of which is joined a stout rubber band, are pro to hold the bottom ends of BANOS. films. One clip is fastened to t bottom of the roll and the ot! to one of the lower cross str As an alternative, the bott strips may have nails part v driven into them also, and t ends of the rubber bands hooked over the heads of t nails. It will be found desirable to provide bands of varying lengt! to take care of different films Cheap and Efficient Film-Drying Cabinet for Professional Photo It will be noted in the draw Finishers That Hastens the Work rolls of film, and will dry them in from 30 minutes to one hour. The cabinet is made of wallboard, which can be obtained from any builders’ sup ply house, nailed to a stout wood frame. Racks, made of 1 by 1-in. wood, are fas- tened to the top to hold the upper end of the films, and about 1 ft. from the floor a number of wood strips are nailed across Riveting Disks to Hubs When attaching a disk to a hub on small work the common practice is to make the hub long enough to project through the disk, which has been beveled, and then 1 I hammer the ] 1ub so that the metal spreads and holds the disk more or less tightly as shown in Fig. 1. This method has the dis- advantage that the disk has a tendency to run out of true due to uneven riveting A better method is shown in Fig. 2. The hub is made with a cup edge and the disk is given a wide bevel. <A tubular tool is turned up to the shape shown, hardened, polished, and revolved in a drill press so that when it is brought down on the hub it curls the metal out and forces it down into the bevel, and finally burnishes it neatly. that the front of the cabinet b tom is hinged to form a do This is convenient for removing the du that accumulates in the bottom. wallboard front of the cabinet is made two sections arranged to slide inthe fram This construction has been found bett than doors opening outward, as it sa considerable space and eliminates the : cessity for catches on the doors.—H Graves, Watertown, N. Y

Ya” RIVETED BEFORE SPINNING Common and Improved Method of Attaching a to a Hub

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POPULAR MECHANICS uloid Keeps Report Sheets Clean e working in a shop where it is le to keep the hands clean, knows ficult it is to keep report and rec- ks clean if the workmen have to ntries in them. However, the dif- s easily ot ais by ke eping a few f thin celluloid handy on the shop ld photo negatives about post-card th the emulsion cleaned off, will lv). When a workman has to do riting he lays one of these on the where his hand rests, and as he the piece of celluloid will slide e paper with the hand. Spring Clip for Tank-Wagon Gasoline Hose en required to make some kind of to keep the from coming off a tank wagon or damaging the paint, the writer devised the cl shown in the drawing, which has been in oper- ation for some time and has prov ed Very satisfac- tory. It is simple to make, instan- TR, «| taneous in ac- (WASHER tion, and is PIN much _ better than straps. clip itself is made of the heavy ga ed strap wh'ch comes around bundles eet metal; this material is good mild A ¥-in. bolt 7 or 8 in. long, with nuts, and a light coil spring with a her and cotter em are the materials uired for each clip, in addition to the The method of mounting the clip early shown in the drawing.—B. E. e, Victoria, B. C., Can. gasoline hose at Motorcycle Whee! Improves Wheelbarrow \n ordinary wheelbarrow is difficult to lle in soft dirt or sand because: the eel sinks down into the soil, sometimes deeply that it is almost impossible to 1049 Pushing Heavily Loaded Wheelbarrow over Loose Sand Is Facilitated by Use of Motorcycle Wheel under a heavy load. who experienced this transporting grapes from his fitted a wheelbarrow with a motorcycle wheel. Che tire is partly in- flated and will not sink deeply into the sand, even when the barrow is loaded to its full capacit I'd. Fraser, Ashland, Oregon. push it, especially An Oregon farmer, trouble in vineyard, Cutting Slots in Small Rods small rods is usually However, a simple Cutting slots in quite a difheult task method of doing it is tration. The rod is first bent sharply at the point where the slot is to be cut and is then in- serted ina vise, as indi- cated, so that a hacksaw can be used to cut the slot. After the slot has been cut the rod is straightened. Wius shown in MM NOD 61/4) SECTIONAL View 4 OF ROD STRAIGHTENED

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Homemade Swing Cut-Off Saw By D. R. VAN HORN cut-off saw is a very handy bein swing addition to the woodworking shop, and the making of of one is no very hard or ex in the il- made from sct ip, with the exception ot the saw and its bearings, and the motor, which was undertaking, as the saw ] lustration pen ive This saw was show >. spring , the other end of w Bet ween ) to one of the top braces. irons the motor support, of by stock, is fastened by means of angle bolted to the support and side irons the end of the 26-in. piece a 2 by brace is bolted, the bolt running thr the end of a 19-in. piece of flat iron, completes the lower end of the frame This end carries the saw, which rut bronze bushings salvaged from an automobile. A 2 by 2-in. brace is bolt lower frame irons above saw, and the saw spindle is fitted wit 2-in. pulley. The motor is fitted witha in. built-up wooden pulley, and the across the ‘“. 4$ PULLEY Z%15 FLAT IRON “se. 2% 2” BRACES A Swing Cut-Off Saw That Is Very Simple to Build and That Will Give Just as Good Service as the Most Elaborate Commercial Saw purchased from a secondhand dealer. The whole saw is and nicely balanced that a touch is sufficient to move it against the work. The saw guard makes it safe to operate, and a convenient switch permits it to be started and stopped instantly. Che construction of the hanger simple. Two triangular brack- ets, of 1 by 4-in. stock, are firmly fastened to the wall at the proper height and braced as shown in the drawing. If desired, the hanger may consist of a piece of 2 by 8- in stock, with the braces and back mem- bers of 1 by 4-in. stuff, thus making the top ot the brackets solid instead of open. To the sides of the hanger two flat side irons. and the other 55 in. bolted, the holes for the bolts being drilled so that the irons will swing freely but without sideplay. Part of the longer iron extends above the hanger and is drilled at the top to take a self-contained is so wall one 26 in. long, are strong 1050 = ye BENCH ° | rivete with a heavy sheet-steel guard, a small angle, which is held by the b that fastens the lower 2 by 2-in. bra The 8-in. saw wil! handle up to 2-in. and is run at 3,000 r.p.m It may be seen from this that the « struction is exceedingly simpie and in pensive. The costliest part of the ou is the 4%4-hp. motor, and even this may picked up secondhand for very lit money. @A good rule to follow when grind milling cutters is to for roughing and 5 allow 7° cleara for finishing cutte

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POPULAR MECHANICS ng Up Old Con- ete Pavement breaking up an rete pavement on treet in Scott- ich., dynamite t, of course, be ing to the prox- f the store win- n both sides of eet, so the method in the photo was d found success- \ strong chain with was hitched to a ul caterpillar the hook being under the edge of ement and a block od put under the to make the hook ipward when the Breaking Up Old Concrete Pavement.with Aid of Powerful Tractor and Hook moved forward. “bite” of concrete was several square in area —M. M. VanValkenburgh, lac, Mich. Drawer Foils Petty Thieves rage men and other mechanics, who ployed in shops where the public is o enter, are often inconvenienced by loss of ll tools personal cles. To these in 0c k e d er is too onven- t and efore the ; range- - ‘.« METAL STRIPS’ t shown alasteniaip the illus- an, ee on was A” SSN ised by \ “ ’ <eWN mechanic. er es bad a ordinary au, er is provided with a knob on the t in the usual way and another knob he underside, the former being merely lummy,” while the latter is actually 1 to open the drawer. Two lengths of lg-in. flat iron are hinged to the un- de of the bench top on either side of drawer, the lower ends being fastened he drawer with flat-head screws. A it coil spring is also attached to the ver and the underside of the bench is shown; it should have enough ten- to keep the drawer and its contents the position indicated in the lower de-

tail so that a straight pull on the front knob will not open the drawer. It can however, easily be opened by pulling downward and forward on the hidden knob underneath. A keyhole in the front of the drawer will add to the deception and lead the petty thief to believe that the drawer is locked. Attaching Carpet to Concrete Floor Attaching a carpet to a concrete floor is rather difficult because nails or tacks cannot be driven into the concrete. It can easily be done in the following way, whi ch, howevy er, . , Sie requires the use ot Ly padding under the carpet: Drill holes in the con- crete along the edge of the wall about 1 ft. apart, and p lug these with hardwood. A tapered wood- en strip Of ap = amowou proximately the PLUG same thickness as CONCRETE” the padding is run along the edge of the room, being screwed to the wooden plugs. The padding is then laid on the floor, and the carpet stretched over it and tacked to the strip. WOOD STRIP CARPET PADDING @ When no resin is at hand, a glazed and slipping belt can be made to grip by throw- ing a handful of ashes on it.

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POPULAR MECHANICS A Novel Ratchet Screwdriver The fir ype of cone bearing s] a the simplest, the en Is of \ lla cone tu cl n the end hay nished with hardest wear, such as the crank et is made of the novel small crankshait. 1 ratchet screwdriver up collar setsctr hown in the illus used to hold the tration. It was’ ment. A solid rear beari le by bending type. rhe space betw ee! rod forms an ideal oil chan to clear the end of their lite. the work and flat The second stvle i F the double tening one end. type and has a cone turned on the at one end and carries a loose or cone on the opposite end. Che cone is setscrewed to the shaft, the resting on the slanting flat which pre the cone from shifting backward whet justed in place. This is a very good d of bearing, as wear can always be take on both bearings alike. Such a beari: suitable for high-speed and precision on such machines .as_ small int grinders and the like. Che third type is known as the cone-t lathe spindle. A cone having two tay is turned on the chuck end of the spin RATCHET lhe shallow taper is 15° and the tent | taper or thrust angle is turned at an a “ais of 45°. As most thrusts are endwise a lathe spindle, a light fiber washer and justing collar are provided to keep Novel Ratchet Screwdriver Used to Drive Screws Hard bearing tight. The busl ing of the ot to Reach with the Ordinary Type : 7 PIN -4 bearing is a taper fit in the frame of The flattened part was drilled to take a machine and, being split, is adjust ratchet piece, slotted in the usual manner tor tightness by advancing it forward and held in place by means of a pin. A the taper hole. This type of bearin groove is cut in the top of the rod anda ©™Y found in the most accurate ar piece of %-in. wire, attached to the top ot the rod, slides in this. The ratchet ac- tion is simple; the operator presses on ~ CONE the handle to cause the wire to engage with one of the grooves of the ratchet. The screw is driven in by moving the “ ~ “4 SOLID BEARING — SHAFT rod with the other hand. To turn the rod SINGLE- CONE AND COLLAR ADJUSTMENT + pressure » handle is re- CONE TURNED 7 LOOSE CONE back, the pressure on the handle is re SSA, EA leased and the wire slides out of the yj 72 ratchet slot. : ° ANGLE FLAT FOR SCREW Making and Using Small Cone Bearings DOUBLE-CONE ADJUSTABLE TYPE : . . —THRUST SURFACE Cone bearings are ideal for small model {THRUST WASHER FRA f , , 1 ADJUSTING COLLAR c work tor the reason that they are adyjust- —— - bo able tor wear, and tor smooth-running a —— a models, a nice snug bearing, without shake, 444) LATHE SPINDLE ica] is desired. Cone bearings are also used it BRASS 4 3 ANS i ilso used in B8SSing So _TARER BEARING SPLIT TAPER SCREW BUSHING” preference to straight bearings, as it is almost impossible to make a small bearing T _ : r =] . od hine accurate in alinement and so that it will Three Types of —_ Bearings for Model Machir : ‘ ifferent Types not wear large in a short time. The split bearing is also less desirable in model work _ pensive lathes and is used to best ad as it makes for difficult construction. tage on small precision machinery.

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Prize Offers and Announcements $50—Snare for Live Fowls Iie i is f it liring at a small wooden ’ pay the thod accepted by us, or a satisfac Ry - , on8 which will enable a person easily $50—Formula for Writing Ink wl around the legs otherwise. Ad rae ; : ty Produce Company, 09 West South Jf i is possible t Chicago, Illinois. cK ms e Hunt Pe ? mrpr e +} ; $50—Profitable Uses for Eggshells egg-breaking plant where several cars of eggs ch day for canning purposes, there is a luct of eggshells While these have been re for chicken feed, we will pay the sum satisfactory plan, process or method of rofitably disposing of these eggshells. All both the offers are to be judged by this ne, and the date of closing for each is May Address Security Produce Company, 209 ith Water Street, Chicago, Illinois. $1,000—Cost Reduction ern makes the Kirstin Fil-Gage for filling ile gasoline tanks under the seat without z > cushions t has an indicating driver at all times and is n place of the cap. The inished sheet metal Our on, ame ior any ac it or developed improvements in operation lave proved it practical and containing the improve yy registered mail for testing acceptance and the assigning to us of pat- rights, we shall pay the amount stated to the whose ideas we adopt. This offer expires May . . Address, A. J. Kirstin, General Manager, A. J $300—Hand-Printing Press Company, Kirstin Bldg., Escanaba, Michigan at : s : ‘ $1,000—Improvements to Lathes awards of $500, $250, $150 and $100. awards will be paid for the four best ideas for practical attachmer for a screw-cutting et € The me al tion and the id re untried and original ement on an att: } plica pil OFFERS ANNOUNCED IN PREVIOUS ISSUES All of These Offers Expire May 1, 1925 YALTIES OF $5,000 WILL BE PAID FOR PROCESS OF MAKING HARD-GLOSSED the first year i 1 hod of animated drawings nade wit! t t ng the ppearance or qu ty h yachts and b n be illustrated to pro- he t c Car »t » will pay the purchasers. Problem NA-1 f¢ WILL BE PAID BY THE HAPPINESS , i Stores, In fe a method of manufacturing : ’ INC., OFFER 1 wl will not turn gray or dull “ei Py mi 9 - or a new radio tr , rit nidliitiane atmospheric ¢ | e Nationa IN RETURNS FROM SALES IS ALSO +} ‘ 1 Company for a highly efficient condenser of small size and large capacity OF NEW MI HA hrough optical, photogra Wollensak Optical C« epted articl NDISE THAT

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1054 POPULAR MECHANICS the Everhot ASSOCTATIO? WILT AWARDS O hat w fs WITTTA™M H MITCHFELI ( ATP ‘ WITT j J Harri : se tgge hermaigell este y-volt ) WILL 1 generat N t y topt I t ule t S o % 1 Produ FOR 4 4 RI } J i | »TFT | ) , 1 st two wee GRANITE STATE MOW ING MACHINI COM ‘Ee 1 accept tor manutact NATIONAL BRASS COMPANY WILI PAY | tide ¢ ¢ $300 for de f key metal a oo . A SLOGAN A sin ir material } th, Caaemine They w i pay the FOR A PRACTICAL INEXPENSIVE MEANS y oil burners of vaporizing type, Aeroil Burt ut an article which will pay $500. e'ectrical shop, ) er and ab THI YELLOW CAB MANUFACTURING company of Ss an award $ 1 perfected THE BENTAMIN plan of traffic and pedestriatr rection and regulation will pay $250 for fit mcluding mechanical devices, regulations, etc., for the vases; $150 for promotion of greater street s ety sh p mater ils fo boosting scheme $10,000 FOR A NI W MUSICAL INST which i € rated t ny rc} RUMENT FOR A NEW METHOD WHERER\ SCRAP FOR THE BEST ) EACH WILI oe FOR NEW WAY ld machi evented in portable TO THE PERSON SUBMITTING whee's otter A denrptn,, -xindied MANUFACTU band and will place among the present family of rims tor musical instr accepte i by the rank of players itput can be taken up by Lyon & Healy, Problem LR;2

ELECTRIC HEATING ELEMENT WHICH FOR ACCEPTED IDEAS FOR NEW US! will operate and interchange with base an er of fans, blowers, shutters, | un Ilg Imperial self-heating gasoline iron, $500 Imperial Ventilating Company offers $5,000 in var Brass Company. FOR A PERFECTED DISCOVERY OF NEW USES FOR CARBON finished silver can be coated dioxide gas or improvements to pr $1,000. or treated to preve esent uses Award nishing, the Stieff Company offers the sum of TO ANYONE FOR AN AUTOMATIC FREEZEPROOF SODA them a saxophone cooler adaptable to “‘iceless’’ type of soda fountains, present reed, the : $1,000 Above two problems by Liquid Carbon will pay the sum of $1,000. Company THE PHENI vw 4 ne $2,000 WILL BE PAID IN SEVERAL AWARDS pay . ae ab for processes and machines for salvaging waste lumber. of condenser for National Lumber Manufacturers’ Associatior FOR A SAT FOR SKYROCKET STICK HARMLESS IN Pleten Tool C $1 19- bombshell } emit lag. $2 21K i, . € with u ited | chemical combinations to produce smokeless fireworks colors, $250. Thearle-Duftield Fireworks Company DONOR I sion for a starting ! ind will MOTOR-OPERATED HANDSAW FOR MANU facture and sales wward, $10,000 in r ties R L Barker and ( npany : $500 FOR SALES PROMOTION PLAN FOR absorbent, non-heat nducting powde t n | ed with other material he Kea Company. rat ROYALTIES OF $15,000 WILL BE PAID BY the Aetna Industries, Incorporate ! I emenis PERFECT IMI in their products or new articles t ! 1 color separation et facture and sales and Ollier Eng RADIO CORPORATION N PROBLEM IS OFFERED B oarrlies FOR A SIMPLE DESIGN OF A NT IN PROCES THE GEMCO MANUFACTURING COMPANY $1 IS OFFERI Dd I will pay $ ) suitable a cie i 1 their general metal-working plant

Full Details Regarding the Previous Offers Listed Above, May Be Obtained by Ad dressing the Bureau of Information, Popular Mechanics Magazine

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POPULAR MECHANICS ADVERTISING SECTION

2." eVEAKAN—

yAY— touchdown, Mickey over the line! Listen to ’em cheer! ’Ray—Mick! Thousands at the game. Hundreds of thousands listening in! Everybody’s eager—excited—keeping young with new enthusiasms. Listening in! I's great to get every word from the field—just as sharp ind distinct as if you stood beside the announcer. It’s great to get music that comes from miles away, every tone and overtone mellow and clear. And these are the things that are making the fame of Radiola Regenoflex. The Regenoflex is simple to operate. It is non-radiating — doesn’t disturb your neighbor’s program. It is selective — gets the station you want without interference. It is sensi- tive—gets big distances on the Loudspeaker. But most im- portant is the new tone quality so real that it doubles the fun of getting the game! “ A} se | “There’s a Radiola Jor every purse” Radiola Regenoflex with compartments to hold the batteries; with 4Radiotrons WD-11 and Radiola Loudspeaker. Complete except batter- ies and antenna... $191 Same without Radiotrons and Loudspeaker..$150 Want a Radiola this Christmas? A gentle hint does wonders. Send us the name of the rela- tive who doesn’t know what to get you, and we'll mail to him—or her—a book about all the Radiolas from $35 to $425. It may help. Or send for the booklet yourself > Radio Corporation of America for Christmas ideas. Sales Offices: ile » t AE 233 Broadway 10 So. La Salle Street 433 California Street “4 j ~ <\0r oF rest a New York Chicago, Ill. San Francisco, Cal. Z a, Arce Om sola ¢ N 6 Radi

REG. U.S. PAT. OFF,

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POPULAR MECHANICS ADVERTISING SECTION HAPPY _ RAED Eemewne BUILD SECURELY & [Braco Vol. 44. Fr w hen you celebrate the demise of Mr. Decay-Germ you may well consider it ‘a successful funeral.” He “had a bad influence’ and his habits were costly. He ended his destructive career by his folly in attacking your mew Colonial Home, built entirely, and for keeps, and with deauty as well as utility, of genuine **Tidewater’’ Cypress, ‘‘The Wood Eternal.’’ Mr. Decay-Germ tried theimpossible, and “diedon the job.”” But—the lesson i Be sure poe get genuine “‘Tidewater,’’ the pie on vaevene from within 200 miles of the see Better send for Free Copy « f Vol. 44. 192 pa es. 96 House oat Equipment, Also 3-sheet Sy pictures Double Plan Sheet Supplement. Full goo were ag ae te Entir ecial ra ylonial Art Supplement “1% a fa mous artist. Entire book exclu SOUTHERN CYPRESS MANUFACTURERS’ ASSOCIATION 5 c 1219 Poypras Buitpinc, New Or.eans, La. s Prk toa or 1219 Granam Bul.pinc, JACKSONVILLE, FLa. oh ae ‘Dau as fee US fe ree Insist on Trade-marked “TIDEWATER” CYPRESS. Accept no other

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Popular Mechanics Magazine 200 FE. Ontario Street, Chicago, U.S. A. H. H. WINDSOR, Founder H. H. WINDSOR, Jr., Editor and Publisher London: Hachette & Cie., Paris: Hachette & Cie., Melbourne, Australia William Street, Charing Cross, W.C. 2 111 Rue Reaumur The Australasian News Co. ) MONTHLY SUBSCRIPTION: SINGLE COPY, 25 CENTS In United States and its possessions, also Canada, Cuba, and Mexico, per year, postpaid - $2.50 To all other countries in the Postal Union - : - - : . - - . - 3.00 All subscriptions are discontinued at expiration. Please examine the date printed on your wrapper. Entered as Second Class Matter Sept. 15, 1903, at the Post Office at Chicago, Illinois, under Act of March 3rd, 1879. nial line he sea. Entire ION Entered as Second Class Matter at the Post Office Department, Canada ly by POPULAR MECHANICS CO, Copyright, 1924, by Popular Mechanics Co. Copyright in Australia. Copyright in France Contents for December, 1924 No. ts—persons blinded in industrial accidents ing ving sign on water tank advertises theater te steam used in advertising tics—one-man flivver plane es more than furniture lpaper finish for auto bodies iles—Driving » hazard in green sunshades avoided meh on ing color spare wheel at rear of car aids parking iles—Equipment and meen ling rear windshield r heat meter 1 roller bearings absorb shocks biles—Fuel : ve adjusters save gas biles—I gnition t spark no aid to motorists biles—Lighting b has two filaments shts a up or down by knob on steering whee ght driving made safe by running-board lights p light run by drop of mercury ‘biles—Lubrication grease-filled shackle bolt nut eliminates squeaky springs touch of button oils chassis fitted with lubricator tan fog-piercing ray to guide fliers guder in air nine hours aking the air safe for fliers skeleton adopted as symbol by fliers with the new mosquito fleet Barbe s—shop on auto Baseball—every move in game shown on screen Bells—church, made of alloy of aluminum Bicycles—water bicycles for river carnivals Board—made of mixed minerals fireproof Boring Machinery—hole cutter for wood and metal used like wrench Bread—whole wheat bread made directly from grain - shes water hose : een lumber reduces cost by using calked seams hoolhouse moved on canal barges ns—needle finding, saves cloth ra—built for queen’s doll house @ & gaies g—egg cups carved from bits of coal aret—slot machine ne ilers—oil burners cause shortage ock—without a face —big deposits found in arctic. ™pass airplane compass guides fliers ring for electrical tests te—*“‘lumber”’ to cut building costs C ime—beating burglar at own game Links—expanding tment Stores—date book for appointments nds—found on farm in S&S. Africa 1 So ™ QOQOOoOOO a0 986 982 892 925 911 975 926 iries—taught by phonograph to sing like nightin- 9 982 Diesel Engine—in locomotive hauls train 100 miles pos jes trained to pull with pony el to destroy lake cri ciency—Industrial—making weather for aids quality of products Eggs—where yolks get color Electric Power power of two handfuls of coal tasks done with electricity Elevators—speed set by machine ; atid powder for blasts in mines. yes eyeshades like lashes shield against sun _— coated glasses admit light but halt glare Fire Protection—gas well fires put out with snuffer Fulton, Robert—statue saved from wreck of station Furniture—vanishing, fixed on door aa ey om and Supplies rames for tilting autos on side for repairing —— handle and lock clamp for measuring oles ee og leather for gloves Gold—world’s, flowing to America Golf—night golf with luminous balls played on lighted course 8 Grass—growing by electricity Guns—safety of shotgun depends on skill in making Gyroscope—yacht held steady by stabilizer Hats—paper hat parasol for men Heat—of breath able to release power to lift tons Heaters—electric coal burner saves fuel Hoists—hoisting tower on auto Hotels—housekeeping on gigantic scale Household Devices ar wane Power—over the mountains with pear” workers oal Liberty Bell—Alabama village laid out in shape of bell Life-Saving—policemen swim in full uniform in life- saving stunts Life-Saving Apparatus—lever release for lifeboats Loading and Unloading tipple turns coal cars over unloading freight cars with detachable steel chutes Magnet—magnetic rod picks up bolts and bits of metal Mars—egegs not boiled on the planet Mars Masks—air-filter mask for painters Mats—moss matting a substitute for linoleum and cork Microscope—pocket, with strong lens eee seas | modeling teaches seamanship Motorcycle—single-wheeled motorcycle carries rider on rim ; Mount Everest—new climb to conquer Moving Picture Photography arrow thriller in movie made by ng camera backward ae when the movie camera won't lie Mower—craft cuts river weeds Music—twenty-seven centuries old on tablet Naval Warfare British fleet outlined in lights phantom ships aid naval ore Navigation—undersea survey of Gulf may aid in fore- casting weather Ornament and Decoration—goldplated stones on sky- scraper launching [Continued on Page 4]

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[4] [Contents—Continued] Paints—fireproof paint saves building Paper—made from cotton products Perfume—supply periled by ban on killing musk deer Photography—revolver ‘‘shoots” pictures Photography—Developing—portable darkroom a hood Physical raining—ride on stationary bicycle tests muscles : 940 Plows—manless automatic tractor plow 924 Postal Service—mimic train robbery tests mail car 884 Pottery—molded like clay from metals 919 Poultry—statue of rooster as emblem of town 917 Prize Offers ‘ : 1053 Pullman Cars—how named 943 Purses—mesh bags woven from wire 909 Radio small rotary spark gap unusual weather conditions not fault of radio Radio Antennae balloon aerial one for several sets Radio Apparatus connecting B-battery switch French engineers produce loud speaker making phone jacks fit properly transformer sealed in vacuum using a C-battery Radio Application from stage thrills to radio drama political spellbinding by radio radio static used as weather warning Radio Broadcasting—broadcasts from ocean’s bottom 1019 Radio Receivers building a portable reflex receiver thirty-cent radio set Railroads—trackless train for highwcy Roads roadside scale for ry! Safes—ancient treasure chest found in old building Safety Devices and easures—collapsible metal air chambers to make ships nonsinkable Sahara, Africa—ruins of Pompeii rivaled in city found beneath Sahara Saws and Sawing Rigs—spur-clad climber walks up tree and cuts off top Ships—figurehead on clipper ship Signs and Signboards cement guards electric light sign mirror signboard at sharp curve Skates—snow skates for winter sport Slot Machines—coin in slot machine sells combs Sprayers—for cleaning and painting Stamping Machine—machine stamps serial by hand Steam—steam at twelve hundred degrees Steamships and Steamboats—horseback riding on ocean liners 929 Street Traffic Regulations —— hand on traffic signal a+ crossing 928 traffic light gives fire alarm and tells engine's route 992 Study and Teaching blackboard tilts to ease eyestrain teaching children by groups of dolls Tables—sixty thousand pieces in table Telegraphy—greater speed in cable messages promised 918 Senta Unde Sam bakes bread to test flour 939 ires door mats woven of old auto tires pneumatic tire for giant aircraft Toys—rattling toy that shoots sparks 912 Typewriter—with piano keyboard writes music 883 Voyages—cypress ship ‘ Big Bill’ to sail around world 946 arfare—war tank wrecked by airplane during battle maneuvers Washing Machine—percolator in wash boiler Watches—broken up by Uncle Sam to test skill of makers 912 Wheels—as window frames 991 Windmill built on silo generates light and power towerless with merry-go-round sails Woodwork—furniture without nails made scout Writing—stone slab butcher’s bill forty centuries ago. 990 904 910 958 967 947 1030 1027 1021 1020 1023 1027 882 947 987 884 887 autos 911 948 888 886 992 919 numbers 990 886 919 888 941 956 917 927 by boy 958 AMATEUR MECHANICS Automobiles—Ignition—spark plug holder Automobiles—Radiators—glucose for anti-freezing solu- tion Automobiles—Repairing adventures of a trouble shooter preventing choker-wire damage on Ford radiator. 1016 1011 1000 Automobiles—Starting Devices—starting a balky Ford in cold weather Baths—improvised shower bath Bicycle—trailer for carrying children Bookcases—extra bookshelf economizes space Brass—testing brassware Caps (Metal)—screw caps for tanks Churn—plunger with two revolving blades Clocks—trick saves alarm clock Coaster—roller coaster Decoration and Ornament—stairway handrail Doors—skid-chain door handle Furniture—built-in Garage—combined garage and boathouse Golf—practice at sea... ; Holders for glue pot ; Infants—support for baby Leaves—preserving leaves in specimen book Linoleum—replaces auto carpet Luggage Carrier—for roadster Odors—removing odors from ice box Plywood—using plywood Scratches—removing from auto Screen—pulling screen wire taut Shades—inexpensive window Smoke—clean-out tee for furnace pipe Stepladders—steps built on drawers Tables—folding tables Toys arrow parachute mysterious submarine Water—distilling apparatus Wire—stretching poultry wire 1014 1011 1003 1001 1002 1001 1002 1002 1016 1018 1018 1012 SHOP NOTES Automobiles—Ignition—repairing leaky spark plugs 1047 Automobiles—Repairing—keeping grease from auto brake bands 1040 Bearings—making use of small cone bearings 1052 Bench—movable workbench 1036 Brass—brush finish on 1042 Brushes—keeping paint brushes soft 1042 Celluloid—keeps report sheet clean 1049 Charts—keeping record map up to date 3 Clips—spring clip for tank-wagon gasoline hose Concrete attaching carpet to concrete floor breaking up old concrete pavement reinforcing corroded steel tower Conveyors—hinged track section in barn Disks—riveting to hubs Drawer—foil petty thieves Drawing—working model aids drawing students Drills—stop for radial drill Ejectors—emergency ejectors, by F. W. Salmon Enamel—filling in broken enamel reel arom | the most out of the grinder Heaters—water heater for contractors Hoist—brake for hand hoist Ladders—safe ladder for silo Laps—making small laps Lathe—radius turning tool Pens—drawing pen cleaner Pests—getting rid of chinch bugs Photography—film drying cabinet Poultry—how to make a fireless brooder Railroads—cattle guard made of cactus Sand—tilting shaker for sand screen Saws and Sawing Rigs cutting slots in small rods homemade swing cut-off saw Screwdrivers—novel ratchet Sheet Metal—cutting circular holes in sheet metal Sprinklers—homemade field Testing crankshaft for cracks finding loose wristpins testing rod bearings Tinsmith—seam folder for Tools—recessing tool Trucks—brakes for shop Wallpaper—tying bundles of Washers—making durable for valve Waste Products—worn paving brick used for mar holes Wheelbarrow auxiliary wheels for barrow motorcycle wheel improves Wood—prolonging life of wooden well curbs Woodwork—tray for beeswaxing screws 1035 1049 04 1043 1048 44 1033

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POPULAR MECHANICS ADVERTISING SECTION BOOKS DRAKE'S THEY WILL RAISE YOUR PAY— ORDER ON 5-DAY TRIAL 1 he books listed below will perfect you in your chosen trade— pave the way to the Written in non-technical language — easy to read and understand. An entire course of instruction Your choice sent postpaid — you benefit 5 days— Order direct from this page. Painting Books jig positions. iw inh ij aA : i oe Automobile Books 4 ile Starting, 1, by Manly. 700 pp Automobile lition lotor Gar, Lighting and {Pub. Jan. . Leatherette Handbook. . Leatherette Truck and by Manly.. Cloth ind Lighting Troubles, es and Repairs. by . Leatherette Care and $3.00 $2.00 $1.30 $3.00 $2.00 $1.50 $2.00 $1.50 $1.50 $1.50 Shop Practice Books Metal Workers’ Manual Leatherette Welding and e Battery, by Manly. Leatherette le Catechism and Re- fanual Leatherette nd beepers pcre by Tuf- Cloth Hi: nadbook Cloth bile U ‘pkeep ‘and Care, by y ... Cloth cle Handbook, by Manly Cloth d Oil Engine’ $2.00 $1.25 $2.00 $2.00 $1.25 $2.00 ylene ie and Logarithmic Tables Leatherette ok for Millwrights. : ‘oth Blacksmithing. . Cloth Shop Practice Cloth oks listed above are only talogue, which you will ut and mailing us the receive ok wanted postage and and send the PUBLISHERS Pv book covers its subject completely. condensed into one volume. money refunded in full if not entirely satisfactory. a few of the many in promptly attached coupon sction order direct from this page—cross name of send in with price quoted books on our money-back FREDERICK J. DRAKE & CO. 1008 Michigan Ave., Chicago Drake Books Are For Sale at All Book Stores PRACTICAL MECHANICAL Mechanical Srenens ¢ and Machine Design ...Cloth $2.00 Pattern Making. .Cloth $1.50 Paseo Books Cloth Binding Modern Carpentry, 2 vols. . Che Steel Square, 2 “vols Wooden Boat and Shipbuilding. . Modern Estimator. Timber Framing Builder's Architectural Drawing. Concretes _ Practical Bungalows. Low Cost Homes Roof Framing, by Van Gast eek . $1. Stair Building and Hand Railing. $1. 50 Electrical Books Telephony, Automatic Switching, by Smith. [Pub. Jan. 1924.) 500pp Leatherette Practical Applied Electricity . , Alternating Current Electric Motor Control Syste ms... Wiring Diagrams and Descriptions. Electrical Tables and Data. . Armature and Magnet Winding. Modern Electrical Construction. . Modern E lectric Illumination. Electricians’ Operating and suai. Motion Picture Operation. . Drake's Electrical Dic tionary . Electric Motors, D. & A Electrical Measurements and Meter Testing Drake's Telephone Handbook Fasy Experiments Cloth Wireless Telegraph and Tele phone Handbook i Cloth Telegraphy Self-Taught Cloth Including 1. $1.25 Steam Engineering Swingle’s Handbook for Steam Engi- neers and Electricians. Leatherette Examination Questions and Answers for Marine and Stationary bkengi- neers Leatherette Steam Boilers Leatherette Swingle’s Catechism of Steam, Gas and Electrical Engineering . Leatherette $4.00 $2.00 $2.00 $1.50 ORDER DIRECT FROM THIS PAGE—ON OUR MONEY-BACK PLAN after For We 1008 Michiga" Chicago. Hl. GENTL EMEN: illustrated Practica My name is ! | Mail Coupon For Free Catalogue Your Guide to Home Study Please catalogue | Mechanica The Mixing of Colors and Paints, By Vanderwalker Cloth Scene Painting and Bulletin Art Cloth Cloth Cloth Designs Leatherette Strong's Art of Show Card Writing Cloth Cloth A Show at Sho’ Cards Sign Painting Strong's Book of Signist’s Alphabets Modern Painter's Cyclopedia Cloth Automobile Painting. Cloth Estimates, Costs and Profits, Paint- ing and Decorating Cloth New Hardwood Finishing Cloth The Amateur Artist Cloth New Stencils Cloth Chalk Talk and Crayon Presenta- tion ° Cloth Farm Books Farm Mechanics Cloth Farm Buildings Cloth Farm Engines Cloth Traction Farming Cloth Business and Reference Books Better Business Letters. . Better Business I-ngiish.. Better Advertising Finger Prints Simplified... Cloth Practical Bricklaying. Cloth Practical Instruction for Detectives. ° .Cloth . Cloth Cloth Cloth Cloth Cloth Cloth Cloth Cloth Cloth Practical Plumbing Hot Water Heating ° :lementary Chemistry...... Courses in Civil Service.. . Cyclopedia of Recipes American Star Speaker. $1.c0 $2.00 $1.00 $1.25 $1.25 $1.00 $1.50 Modern Languages By Prof. P. S. Allen, U French without a Teacher Spanish without a Teacher German without a Teacher. Everyday French Everyday Spanish....... Cloth Cloth Cloth ——_s = = CK J. DRA FREDERI perocenee KE & CO. send me fre which lists an 1 Books for Home = : ” describes Study- of Chie ago aid, your tage over 100

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6 POPULAR MECHANICS ADVERTISING SECTION Neglectof Home-Study Training Cost This Man $47,424! How much are you paying to stay untrained? The other day we received a letter which every man working for a living ought to read—whether he’s making $20 a week or $200. Here it is: “During the forty years that I have been working, my salary has averaged less than twenty-four dollars per week with the exception of the last two years while I have been acting as foreman of a department. I made good in this position on a small scale and saw, thru the failings of others, what would happen to me unless I found a way to train for larger responsibilities, _ “I had read of correspondence courses and began search- ing for that which thought would benefit me. I found it in_the LaSalle Modern Fore- manship course, and ben- efited by it, my salary being nearly doubled,and I was promoted from fore- man to factory superin- tendent. ‘This happened in a pe- riod of about ten months, and by devoting only about four or five hours per week to the studies. “Tam nowenrolledasa member of the Industrial Management Efficiency course, and find the work very interesting and bene- ficial. It can be applied every day in the factory, and brings results. "I regret that I put it off to so late a day in life to reap the benefits 1 am now enjoying, and can truthfully say to younger men that if they would only profit by the experience of others they can gain more knowledge thru one year’s training by LaSalle methods than can be obtained in ten years’ practical experience by hard work.” SHERMAN C. WOOD, Maryland. We quote the above letter not because Mr. Wood %s now making a staggering salary as a result of his training, but because it illustrates so clearly the principle behind LaSalle training. Here is a man who all his life had accepted the thought that he was compelled to work for little or nothing. For one thousand, nine hundred and seventy-six weeks the writer of this letter Jazd at least $274 a weck for the doubtful privilege of staying in the ranks of untrained men. Can anyone doubt that training would have doubled his salary just as easily when he was thirty-eight years younger—when he could attack his work with the abundant energy of a youngerman? Yet his neglect of this one main avenue of busi- ness progress cost him—leaving simple and com- pound interest out of the a appalling sum of $47,424—a fortune in itself. If You Could Use $47,424, Pause Before You Turn This Page Perhaps you are now making quite as much as Wood — perhaps more. Perhaps, on that account, you may think that Wood’s experience does not apply to YOU.

But if training in Higher Accountancy—or Modem Salesmanship—or Business Management—or Law— or Business Correspondence—or any of a dozen other branches of business could change your forty- eight dollars into $% @ week—and if you now NEGLECT to advance yourself thru the training you need—will you not find it difficult, thirty-eight years from now, to explain to those who are dear to you why you threw away—not $47,424, but fully $95,000? We’ re not going to moralize. We're not even going to cite you any of the thousands of letters from men who have not merely doubled but tripled and quadrupled their incomes thru home- study training under the LaSalle Problem Method. We dave the letters. We will show them to you, if you like. But under- stand, please, that they would not adr the facts—they would merely emphasize them. Below this text there’s a coupon. We believe that if you wil] re-read that letter from Sherman C. Wa ? prowl will face your problem of advancement squarely, you will not turn this page until you have clipped the coupon, filled it in, and by placing it in the nearest mail-box placed yourself on the road to real success. LaSalle Extension University The Largest Business Training Institution in the Worid Dept. 1264-R Chicago, Illinois Upon request, the hook, “Ten Years’ Promotion in One,” and material completely descriptive of the course and service that interests you, will gladly be sent without cost or obliga tion. Indicate your choice by checking, and write below your name and address. OBusiness Management OMedern Business Corre- O Modern Salesmanship spondence and Practice Oigher Accountancy O Modern Foremanship OLaw—Degree of LL.B. and Production Method: OTraffic Management o Ferecunel end Employ: age men geme ~~ hres _— OCExpert Bookkeeping OCommercial Law OBusiness English OlIndustrial Management OCommercial Spanish Efficiency OEffective Speaking O Banking and Finance Oc. P. A. Coaching Re CED ee EN Se TR EE en as eee RIE. <cceccicetamnpuncnatdeiguccuninssguiauiiinaningeimmitens seuanail . -*

A C POCK FLEX! COVE 3100 | TRAT = 160 PAGE

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ter >TY) li nis in, ed POPULAR MECHANICS ADVERTISING SECTION 7 CRPENTERS GUIDES THAT SOLVE PROBLEMS A Complete Course in Practical Carpentry and Building Work “Tiatnatte, tor Begtanore or O14 Timers’ udes and fa find the arrangement of subjects and the POCKET SIZE= ’ simple way it ie explained make the 3 books very valuable for the beginner FLEXIBLE - di re or ? oka ve sble for the beginner. COVERS — y ady for the old timers —Kowe Smithy 3100 ILLUS- Y es ta “Good for Professional Car- TRATIONS eo ¥ é penters"’ = 1600 f re It ie the most handy refe J that I ever came a It ie the very thing that ‘the ing anic needa ¢ reference.— George I 36 Munson St I City, N. ¥ “Guides Save yer Knocks” , re truly wonderful Aupets Auovets old > ties rtnc a e% x a G €Y : . 4 SENT yn ON —_ APPROVAL! NEW IDEAS—MODERN METHODS—SHORT CUTS ©, “ Audel’ s Guides for Carpenters and Build- | cuts, time and labor saving suggestions, new ways that 4 handy volumes of over 1500 pages with | cover the entire theory and practice of the subject illus ustrated charts, diagrams, graphs, pictures | trated by sketches and forms all specific and practica ns for every job from m iking the exe ava- | Audel’s Guides give you the short cut, , ructing the entire building. You will find | information you want. No need to rul des most complete and comprehensive in | chances Every day you have before you in cing both timely and pract i There are | set the exact, practical, useful information that «! examples of efficient construction work with | will help you with every job that comes up in , ds, ideas, solutions, plans, systems, short | your daily work. H 0 To Handle the Job | tion for Carpenters, Builders, Join- | NQ) MONEY! ers, Building Mechanics and all ® That I ms eer : Puzzles YOU | Woodworkers on—Care and Use of | MERELY SEND usands of examples of | Tools—How to Use the Steel Square COUPON struction and building lie Saws— Make All Kinds of Joints AND ew methods, new ideas, | —Vraw and aRe ad Plans Ww ried eci- CR os a » . ike stimates iow to iciency ple sn cuts or on | a mend sh ie os , ime hoot 3 and Houses— Lay Out ring | ggestions, new ways or Put in Foundations—Full Ir er the entire theory and ruction on In and Outside Bullding f modern carpentry. Every Work—Stair Building—Saw Mill Wor} easy to read and understand Pri — ——s : TI ee of y illustrated w tches | 2 . lat save time and mone} = tee wah hotel information usually obtained only asiae irade iniorma- j by hard experience EXAMINATION Not acent to pay until you see the books. Noobligationtobuyunless you aresatisfied. Fill incoupon in penctl. Send now—today get this great help library for 4 carpenters and builders. 4 re th

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8 POPULAR MECHANICS ADVERTISING SECTION eee eae EARN $60 TO $200 A WEEK Why work at dull uninteresting work, at low pay, with no future? In 12 weeks I will train you for a big pay job where you can command $60 to $200 a week as a COYNE TRAINED MASTER ELECTRICAL EXPERT or you can go in business for yours« if with very smal! capital and make up to $15,000 a year Men trained as I train them are in demand every where The great development of the Electrical industry makes the demand for trained men tremendous. Big opportunities and advancement for those who prepare now. The Coyne school was founded 26 years ago and my thousands of SUCCESSFUL GRADUATES are living proofs of what my training can do for ANY AMBITIOUS man. Many of these fellows will tell you in my big free ma book what Coyne has done for them COMPLETE ELECTRICAL TRAINING IN 12 WEEKS wi I train you thoroughly on the greatest outlay of ACTUAL ELECTRICAL machinery ever assembled in any school. You Don’t Need Education or Experience You work with your hands on all kinds of Elec- You don't need a lot of schooling to master 1 trical apparatus, door bells, house wiring, arma- course. You don’t have to be a high schoo! an tures, switchboards, dynamos, Dy A graduate or even a grammar school graduate ay rs an all around ELECTRICAL My method of instruction is clear and plait ha PE! This REAL WORK with REAL tools, ‘ and yet thorough, and if you can understat plain English I will make you an electri tu expert even though you haven't a lot of edu tion or any previous electrical experience Coyne Trains You for Life You get a free life scholarship which en- .’ yo ables you to stay longer than the required ,° time if you care to, or you may return Pg at any {time to take up new work ? on 4s AL machinery trains you many times FASTER, many times MORE THOROUGH than trying to learn in the field or by books or lessons No Books, No Lessons, No Classes — You Do Actual Work! I do not attempt to teach you by books or lessons I train you to work with your head and hands on the same kind of Electrical Machinery used lam constantly adding to my school és H.C. LEWS in power houses, industrial plants and on the to make it the most modern at all at outside, under actual working conditions, with times. Fg COYNE st instructors at your sice I have no classes, ° - every student gets individual training Kern While You Learn .’ es aus or My employment department é . ‘ ; Free Radio and Auto Course H.C. LEWIS. President will assist youto a part time Pd W. Harrison St. I For a short time only I am including ABSO- : job where you can makea Pa Dept. 135-9 . LUTELY FREE my big new Radio Course and good part of your living expenses while training, 7 Chicago, Miinois t Auto, Truck and Tractor Electrical Course and they will assist you to get a BIG PAY job on graduation - Dear Sir: — Please “ wu ELECTRICAL ©¢t My Free Book /."; i just pg op Py absolutely FREE ‘ —sise 12x Li we actr “| 1 oto i. ~ fm ad new book and ful 4 - COYN SCHOOL oe Cont me adollae to print, but icesoure” at” Of Sour nectal offer SEE P yoo mall enpen. Yel cob Dee peel ’ a [ . ° to get the facts ° 1300-1310 W. Harrison St., Dept. 135-9, Chicago, Il. ee la , - - t . | ! e Address ba [ " ' Tou n 0 State oe cvcceces eeccece Cc

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POPULAR MECHANICS ADVERTISING SECTION you never had a chance! “Four years ago you and I worked at the same bench. We were both discontented. Remember the noon we saw the International Correspondence Schools’ advertisement? ‘That woke me up. I realized that to get ahead I needed special training, and I decided to let the I. C. S. help me. When I marked the coupon I asked you to sign with me. You said, ‘Aw, forget it!’ “I made the most of my opportunity and have been climbing ever since. You had the same chance I had, but you turned it down. No, Jim, you can’t ex- pect more money until you've trained yourself to handle bigger work.” There are lots of “Jims” in the world—in stores, factories, offices, everywhere. Are you one of them? Wake up! Every time you see an I. C. S. coupon your chance is staring you in the face. Don’t turn it down. Right now more than 180,000 men are pre- paring themselves for bigger jobs and better pay through I. C. S. courses. You can join them and get in line for pro- motion. Mark and mail the coupon, and find out how. the position or in the INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5656-D, Seranton, Penna. Without cost or obligation. please tell me how I can qualify for subject before which I have marked an BUSINESS TRAINING COURSES Industrial Management Personnel Organization Traffic Management Business Law L)Banking and Banking Law Accountancy (including C.P.A.) Nicholson Cost Accounting cle Management Bookkeeping Private Secretary Spanish (J French )Salesmanship [ )Advertising | Better Letters }Show Card Lettering C)Stenography and Typing | )Business English }Civil Service C) Railway Mail Clerk Common School Subjects High School Subjects Li lustrating () Carteening TECHNICAL AND INDUSTRIAL COURSES ee a Engineering Electric Lighting Mechanical Engineer Mechanical Draftsman Machine Shop Practice eye Positions jas Engine Operating He ivil Engineer Surveying and Mapping Metallurgy Steam Engineering Radio Name Occupation Architect Architects’ Blue Prints Contractor and Builder Architectural Draftsman Concrete Builder Structural Engineer LjChemistry [) Pharmacy JAutomobile Work Airplane Engines Navigation Agriculture and Poultry Mathematics Pereona residing in Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada.

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POPULAR MECHANICS ADVERTISING SECTION Be CookeTrained Million Dollars Spent Every Year for Upkeep The World’s Biggest Business Needs You! Think of it! Five BILLIONS every year for upkeep alone! No matter where you live this tremendous field offers unlim- ited opportunities EVERY- WHERE. The Auto Industry needs trained AUTO EX- PERTS. It needs YOU! GET YOUR SHARE Mail the coupon. Let me show you how I train you for positions paying $75 : tos: Wa week. My “JOB-WAY” train- 4 sd B. W. COOKE ing has prepared hundreds of men just te Sheeting Engine like yourself for quick, brilliant success f “Pey.RaiserofMen in the Auto business. Let me show you —— how it can fit You for BIG PAY jobs. You Don’t Need to Leave Homie I mean it! I guarantee it! If you don’t find it’s true, I'll give you my training absolutely free! Ke job. Stay home. Save hundreds of dollars. R free book. See how “JOB-WAY” is most practi See What I Can Do For You! thorough, easiest learned, BEST Auto training . . > y > a y Start to Make Money Quick Like These Men! As Directing Engineer of the great Chicago At I know what training you need—and I give y: In my iles are letters from hundreds of enthusi TRAINING! I insist that you become a BI‘ astic boosters of the “‘JOB-WAY Many had not a 4 S > fe Sy ite } a day’s Auto Experience before enrolling. Others EXPERT. Students’ letters in my free 300K , had as high as 10 to 15 years’ Auto Experience. to you that you need not leave your doorstep! Read what a few of them say . y ; 6“é 99 1 ‘Am already making $50 to $60 a week in my new Job-Way Costs Many Nothing wr... Will make $75 to $100 soon.” writes M. J. . Morriston, Parkersburg, W. Va., who had not a day's Earn While You Learn experience before enrolling Nearly all my students earn real money long before they’ “Wouldn't take $1000 for what I have learned.”’ says through my training. Many make more in ONE MON] Chris. F. Baden, Spangle, Wash., who has finished only entire cost of my training. Get my book. I'll show you half my training so far this too. I give you Free life-time service from my Er **Have been in the Auto business for eleven years, but Department also. find I still have lots to learn about Autos,"’ writes Fred Wood, 41 Norway Ave roronto, Canada Auto Mechanic with 5 years’ experience before enrolling **I give your course all the credit for be “ing in business . for myself and making what I am today," writes 20- year old Harry Carter, R. L., Lima, Obio, who had no 2. previous Auto Experience.

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POPULAR MECHANICS ADVERTISING SECTION With My Training You Can Go Into Business! 5 Mil llior . Trucks, Tractors on roads teday. Thou- ‘ nds more made every year. Opportunities i Auto Experts are Enormous ned man is assured of a big, successful ttle capital needed. Rich prizes reward the o knows and is trained to give better service, 1! My book will show you why ~ Other Training Like wee SOBWAY Bs _ Net Book Learning —It Is Practical his—‘‘Job Way” traming is not books! I don't ig, thick volumes full of old, dry-as-dust, rubber- hnical matter. Takes months and months to get I train you with Tools and Illustrated Jobs, cal talks just as though I were standing right be- You simply sit back and absorb all the important ( know ledge that I and my ae Staff 1rough many years of experience. It ts mod- l pe rsona! training that you get from me. Training Complete in Every De I believe in doing ONE thing—and doing it well. I teach automotive work. Not adozen different things. My trafning ineludes all Electrical work, ignition, starting, lighting, ae —— ® ing. vulcanizing, etc also usiness Course, Salesmanship, Advertising. Make $75 to $200 a Week e Buying, How to Keep Simple . ‘ Books—everythingtomakeyouan )on’t sell your time for a penny less! You don’t need to ae rt—also Free Monthly when you have this wonderful training. There are hundreds of big- Mag azine, also 2 free out- fits. Nowhere else can pay positions open right now, waiting for Cooke-trained Auto Experts. you get all thts money- here are opportunities waiting for YOU. Just read my book. See making training. No- how many opportunities there are to start a business where $3,000 to where else can you get $15,000 a year and more can easily be made. Noother business is grow- the original, genuine ae . sore copyrighted “JOB- ing so fast, or offers you so many big opportunities. WAY” training Get My Big Book Quick! It Is Crammed Full of Dependable, Proven FACTS! . « &, : I will send it to you without one penny of cost. Read Experience, . . : all the facts, find out about the demand for Cooke-trained Auto Ex E « perts. Let me tell you how easily and quickly you, too, may become ducation Not an Auto Expert. Special offer right now to ambitious men. Cou N d da! I don’t care how pon brings complete information. Mati it today! eeced. little schooling you I will make you a successful Auto t or refund your money! Boys and ages have become Garage owners and gers, Superintendents, Foremen, Auto Ex BIG PAY executives, with Cooke “JOB- ining behind them. My book will prove .. will fit you to take advantage of the rful opportunities of the great Auto Read My Guarantee! irantees in my big free Auto Book. I guarantee to refund every cent of your | after receiving my tratning you are not abso- ed.”” T his and nine other wonderful guar- ike my “JOB-WAY™” course the training Be sure to get my book and a all 10 the most amazing protection offered by Ol on earth! Ad its itn B. W. Cooke Picir CHICAGO AUTO SHOPS 1916 Sunnyside Avenue,Dept. 916 Chicago

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12 POPULAR MECHANICS ADVERTISING SECTION he] } he at Course SEV Drawing Instruments Drafting Drawing Mail Free Coupon Below Complete Set of Drawing Instruments de. lievered at once. Yes, I will give you complete drawing outfit, a regulation ““Chief’s Own” drawing table and, besides, give you an opportunity to get a drafting course free of all money cost to you e instruments I give are in a handsome high class, plush lined folding case. They are regular draftsman’s working instruments. ides I will _ set absolutely free, a 20 x 25 inch drawing 24 inch T square, a 12 inch rule, a supply of drawing paper, two triangles, a French curve, pencils, erasers and thumb tacks as soon as you be- come my student. Salaries up to $250 to 300 Per Month There isan urgent demand for skilled draftsmen. Companies are issuing calls every day for men to fill positions paying up to $250 to $300 a month. Work is light, pleasant and profitable; a trained draftsman can be reasonably sure of having a good job all the time. advance you rapidly. and make you do it ri “Ussrehronpemonaty:” ie | ith ay g iB: Chief Draftsman, Engineers’ Equipment Co., Div. 13-59 1951 Lawrence Ave., Chicago, Illinois Without any obligation on me whatsoevers please, mail your k, “Successful Drafte- manship”’ and full particulars of your liberal “*Personal Instruction”’ offer to a few stadents, me It is understood that | am obligated in no way whatsvever. PED ccncecsncese Address Chief Draftsman I am Chief Draftsman of a large and well known firm. I have been doing the highest for a quarter of a century and ing \—y is demanded from men who get bi ‘anlacies. I train _—s giving you actual, practical work, th able to do to holda ee big payin you my individual instruction, If your wo tk is right, I will If it is wron ht, and do all I expert draftsman an designer in a short time. Write Today Without Fail! Will instruct You Personally aying expert draftin work know just the kind o train- I Guarantee to train you until you are holding a position paying up to $250 and $300 month. e kind you must position. I give . | will show you where can to make you an Send Coupon For New Book Put your name and address on the coupon or a letter or a post card and send it to me today. I will serd you absolutely free and pesteaid, = new book ‘‘Successful Draftsmanship,”’ and the great special er that | am now making, on which —_~ get ti complete Draftsman’ s Working Outfit pbostas ely free. You assume poy obligations of any kind in n the Get in ane - r 6 STS ing —-. Getting the Book and full particulars of offer is the first step. Chief Draftsman, Engineers’ Equipment Co. 1951 Lawrence Ave., Div. 13-59 Chicago, Ill. :

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POPULAR MECHANICS ADVERTISING SECTION Get Elect Outfi ( rical ts OB-METHOD training is {four complete Electrical h | send you without ex- With these valuable in- tools and materials, you loing actual Electrical 1 get the theory while practice My JOB struction makes it easy for and the most difficult subjects GUARANTEED JOB and RAISE If you are now earning less than $40 a week, I will guarantee you an Electrical job after you finish my training—guarantee you at least 50% more pay under bond, or refund every cent you pay for tuition. You can get this guarantee only from AMERICAN SCHOOL, the 27 year old, million dollar educational institution. Go Into ELECTRICITY! The world’s greatest, fastest growing, most fascinating industry will pay you $3500 to $12,000 a year when you are an ELECTRICAL EXPERT trained to BOSS electrical construction or electrical power plants, to direct the work of ordinary electricians. Prepare for these positions, at home in your spare time, with Dunlap JOB-METHOD training, the most complete and up-to- date home instruction in Electricity. 22 Electrical Engineers from Westinghouse, General Elec- tric, Commonwealth Edison, West- ern Union and other great corporations helped me to build this wonderful home- study training. So in every department of Electricity you get your training from a specialist and an authority! These executives know what training you need to hold down the BIG-PAY positions in Electricity, and they give you just that training. BOSS Electrical Jobs at $70 to $200 a Week! New projects in Electricity total hundreds of millions of dollars. No other industry offers such a golden future to trained men, trained as I train you. Electricity rewards not only the occasional genius like Edison and Steinmetz. This giant business also pays rich prizes to thousands of men who master electrical principles as I help you master them in my JOB-METHOD instruction AMERICAN SCHOOL organized NOT FOR PROFIT, gives you the benefit of royalties, profits and other savings. the facts and take advantage of my offer. Get the facts about your chances in the Electrical business. Get my big, free catalog, see for yourself how quickly and easily you can get ready for Big Pay! CHIEF ENGINEER DUNLAP Electrical Division Write me at else nee and save $63 cash Get Make This Training Pay for Itself! Don’t let lack of ready money or anything prevent you from getting my As early as your eleventh lesson I train you to do Electrical and Radio jobs in your spare time—to earn enough money to pay for this course and have some left over training American School Dept. EE-974, Drexel Av. and 58th St. CHICAGO Chief Engineer Dunlap American School, Electrical Division Dept. EE-974, Drexel Ave. and 58th St. CHICAGO Please rush free book, guarantee of a job and 50* raise, $63 Free Scholarship offer and complete in formation.

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

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POPULAR MECHANICS ADVERTISING SECTION 15 Pills Never Made Muscles Wishing Never Brought Strength O one can paste muscles onto your arms and shoulders. If you wish it a strong, healthy body, you must work for it. And if you don’t have one, you are doomed to a life of misery. Modern science has taught us that we must keep our bodies physically fit or our mental powers will soon exhaust themselves. That is why the successful business man resorts to golf and other active pastimes. Examine Yourself Do you have the strong, robust body that keeps you fii at all times to tackle the daily tasks confronting you—always looking for bigger things todo? Do you jump out of bed in the morning full of pep; with a keen appetite and a longing to enter the day’s activities? Do you finish your daily tasks still thrilling with pep and vitality? Or do you arise only half awake and go through a languid day? PEP UP! Don't let it get you, fellows. Come on out of that shell and make a real he man of yourself. Build out those skinny arms and that flat chest. Let me put some real pep in your old backbone and put an armor plate of muscle on you that will make you actually thrill with ambition. I can do it. I guarantee to do it. I will put one full inch on your arm in just 30 days and from then on, just watch ‘em grow. This is no idle boast. It’s the real works. A genuine guarantee. Come on now. Get on the job and make me prove it. Send Forlty New 64% Page Book. ” IT IS FREE SS? Sas ke ap eee Pe eabe @ & It contains forty-three full-page photographs of x myself and some of the many prize-winning pupils ! EARLE E. LIEDERMAN Ihave trained. Some of these came to me as pitiful i Dept. 2012, 305 Broadway, New York City aKINgS, imploring me to help them. Look them Dear Sir I enclose herewith 10 cents for which you now, and you will marvel at their present are to send me, without any obligation on my part what ysiques. This book will prove an impetus and a ever, a copy of your latest book, “ Muscular Development real inspiration to you. It will thrili you through and through Please write or print plainly d it is yours to keep. This will not obligate you at N for the sake of your future health and happiness, do Nari it it off. Send today—right now, before you turn “EARLE E. LIEDERMAN Dept.2012, 305 Broadway, New York City ‘ ’ t ! i k is 10 cents to cover the cost of wrapping and mail 4 ! | ' | ad

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I GUARANTEE to (abd you personal, individual training in every branch of Dental Laboratory work, to make you expert in onths!

Get ready for these Jobs! Where else can you earn such large sal- aries after only a few months of training? My training is the quickest way to BIG PAY. At my schools you become Expert in EVERY BRANCH of Dental Labora- tory work, not merely skilled in some one part of it. That is why you will read letters in my book from McCarrie graduates telling of winning won- derful successes and enormous salaries. Open a Laboratory! That’s the big thing my students and graduates aim for—a business all their own! Remember when you are a McCarrie-trained Dental Laboratory Expert IT TAKES VERY LITTLE CAP- ITAL to open a Laboratory of your own. So I say to my students and to you—train at my schools as the shortest road to a business of your own, good for profits of $6,000 to $15,000 a year. Get This Book Quick! It will show you how to pull your- self out of the rut, how to lift your- self out of small pay, hard work into the fascinating, professional life of the well paid Dental Lab- oratory Expert. You need this 90k if you are earning less than $75 a week and want to make something of your future. Coupon brings it, mail u today!

li, A McCarrie, Director, McCarrie Schools of Mechanical Dentistry, 1338-1340 S. Michigan Ave., Dept. 1501-L, Chicago Send me your three free offers and your Book without cost or obligation. Tell me about the Dental Laboratory busi- ness and the training you give at your schools. ‘a i attach letter stating the kind of work I am interested in while training at your schools

OF eT eee TT ee ee Tre Name St. No State

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16 POPULAR MECHANICS ADVERTISING SECTION , Bea Dental Laboratory XPERT? With my training any fellow with a little mechanical ability can become a Dental Laboratory Expert in a fey months! Here is a growing, uncrowded business calling for more experts than it can find—men trained as I will train you to make Crowns, Plates, Bridges, etc., for Dentists. This work is interesting, clean, easy. Salaries $75 to start up to $125 and more per week for EXPERTS. Why don’t you investigate the wonderful opportunities of this profession and break away from poorly paid harder work? ““Work your way thru McCarrie School” In Chicago (and Detroit) any ambitious fellow can with my help find a well paid position which will enable him to attend my schools evenings. Hundreds now at my schools, hundreds who have graduated have done this. Others go to my schools days and.work evenings. Day or Evening Instruction Don’t let lack of ready money keep you back. I will help you. When you mail coupon for com- plete informa- tion. be sure and tell me what kind of work you are inter- ested in, so I can arrange to place you at once when you This is Not a “Correspondence” School. arrive. You Learn Here by Doing Actual This picture Dental Laboratory Jobs shows how train my students. No classes, no text-books. You learn on a “cases’’ from ethical practical Dentists, you learn with standard 1 ments on actual materials at my schools. Individual, p» instruction, intensive methods, enable you to become expert 1 branch of Dental Laboratory in only a few months. My scho Chicago and Detroit are the largest and best equipped Denta oratory schools in the world, and my graduates are the most suc i. R.R. Fareto Chicago or Detroit oR 2. $80 SCHOLARSHIP 3. COMPLETE OUTFIT In order to encourage more men to go"into Dental Laboratory . and meet the big demand from Dentists and Laboratori n making extraordinary inducements right now! Even if you only common schooling, no matter what your age, get all th about this wonderful business and my remarkable offers

Coupon brings complete information, mail it or write immediately. Address, H. A. McCARRIE, Director McCarrie Schools of Mechanical Dentistry Dept.1501-L, 1338-40 So. Michigan Ave., Chicage

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POPULAR MECHANICS ADVERTISING SECTION I Tell You This Free Book Will Show You The Way to Amazing Salary Increases - READ! $12,000 a Year \ ‘ard Chicago, held a »b Now he averages year as a salesman. $100 a Month to $100 a Week in Only 3 Months » Miller, another Chicago iking $100 a month as pher in July, 1922 In ver, 3 months later, he ng $100 a week as a $150 to $500 a Month Clenny, of Kansas City, epped from a $150 a erkship into a _ selling 00 a month. In one month $850, $6,500 a Year Stephens, of Aneey Ky., ng $25 a we He took sining and now makes that much n att Pay to Big Earnings Cash f Atlanta, Ga ed his $75 a month job for pays him $500 a month, Sales Manager at $10,000 a Year i Malfroot of Boston stepped into a $10,000 is a SALES MANAGER ro ugh is this training. All ecesses are due to this nating and rapid way to ertain invincible secrets EMPLOYERS ted to write to the Em- nt Dept. of the N.S. T.A put you in touch with just you need. No charge for vice to you or our mem- Employers are also cor- nvited to request details he N.S. T. A. Group Plan truction for entire sales Synopsis and charts sent obligation I only ask that you risk two cents on the strength of my word that the contents of this amazing book will show you the way to a prosperity that you never dreamed possible, Wodern tlestaanship fi in a fascinating field that you never thought of entering. This book is now frec. Read my offer. By J. E. GREENSLADE isk you two questior Just u learned the alphabet, so you ou consider that yo ure n learn salesmanship. And through the is the average mail-clerk, irm- NATION \1 DEMONSTRATION e clerk, mechanic, or bookkeepe a THOD—an exclusive feature « tl If you suddenly found f S. T. A. System of Salesmanship T: money vou needs to spend ing—you gain actual experien wl best clothes I od, driving the } | the best « Years of Selling Experience in a Few Weeks oft Sale ) linajobtl it scare yo n $10,000 a Now, ir e quick p you can enter t Remarkable Book, field where of ties in your fav ten to one **Modern Salesmanship,’’ Sent Free With mv compliments _ that Salesmen top the t of money-mak satin mths oe , weer Pat k is fascin profitable! own abilits first-class " vit aly Proof That Salesmen Are Made —Not ‘*‘Born’”’ i content enaaienes 1 National Salesmen’s Training Asseciation sdikser Gal” Siar ‘tee hanhianes Dept. 12-W 53 W. Jackson Blvd Chicago, Ul nect n > tarmers le rks even SSSSSSSSSEEEEEEE TEES SEES eee ee Seneca: — ‘ P onal Sale smen's Training Asrociation lawyers and ministers—but — “pt. 12-W, 53 W. Jackson Blvd., Chicago months after writing to the Nati - lil. men’s Training Association they were o1 dis in the field selling—and m ng é money than they had ever Sounds remarkable, doest there is nothing remarkable ibou Name Salesmanship is governed by rule nd There is a certain way of sa z and d things, a certain way of approaching pt pect to get his undivided attention, a cert way to overcome objections, batter dowt prejudice, and overcome competition. ply want to see the wets ime free your book. “* Modern Sale f that I can become a Master > Address Occupation

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IS POPULAR MECHANICS An Easy Way to Learn PHARMACY AT HOME Graduate pharmacists are always in demand. The work is interesting and pleasant and sala- ries are good Many young men open drug stores of their own and become independent There's an easy way to learn pharmacy right in your own home in spare time, without losing a day or a dollar from your present work. The International Correspondence Schools course in Pharmacy supplies the knowledge which it will be necessary for you to have in order that you may pass your State Board Examination Just mark and mail the coupon printed below to the International Correspondence Schools Box 5657-D Scranton, Pa., and full particulars about the Pharmacy Course or any other work of your choice will come speeding to you by return mail INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5657-D Seranton, Penna. Without cost or obligation, please send me full information the subject before which I have marked an X in the list TECHNICAL AND INDUSTRIAL COURSES PHARMACY CF)Civil Engineer about below : Chemistry []Surveying and Mapping f] Automobile Work ‘|Mine Foreman or Engineer Navigation []Steam Engineer } Agriculture and Poultry [}Gas Engine Operating “| Mathematics f}) Wireless Airplane Engines Electrical Engineering O: Architect ‘Electrician { }Contractor and Builder | }Mechanical Engineer [) Architectural Draftsman _} Me chanical Drafteman }Concrete Builder Machine Shop Practice ]Structural Engineer (J Railroad Positions Plumbing and Heating BUSINESS TRAINING COURSES [) Business Management ( Salesmanship is Industrial Management { }) Advertising Personne! Organization {|} Better Letters } Traffic Management Foreign Trade } Business Law Stenography and Typing 2) Banking and Banking Law Business English ") Accountancy (including C.P.A.) () Civil Service 5 Nicholson Cost Accounting Railway Mail Clerk Bookkeeping j}Common School Subjects Obrivate Secretary }Hich School Subjects ——aeae _) Business Spanish DO French iIlustrating C) Cartooning NQMRO..............:esseenececcececcssccessssoreseeres Street AGATOGE. ... ..-.....0cceeeeeree gqnsncsneseuneseesecuseeceserecceseccnsesenenibevecevecsuvenssnenset COW ....00.210.00..seccccccccscesoree o State Occupation Persons residing in Canada should send this coupon to the Interna- tonal Correspondence Schools Canadian, Limited, Montreal, Canade ADVERTISING SECTION WEALTH, HONOR, RICHES Do not depend upon opportunity or intell: brilliancy of any kind, it is well know: ted people acquire great wealth, v and talented people remain in poverty because uneduca often cultured Again, they do not depend upon capital, be with capital what they have others with no capital acquire phenomenal wealt many men lose Whatever finds a place in human experience i result of the operation of natural laws, and the d mining factors are therefore within your Own cor This may seem ‘‘too good to be true,” but i will consider that by the touch of a button or the t of a lever science has placed almost infinite resou at the disposal of man, it becomes evident that t may still other laws not generally known w contain even greater possibilities. be We have published a Remarkable little bool giving the conclusions of science concerning these | which will send upon request. If you want underwrite success on a magnificent scale, send {or we MASTER-KEY INSTITUTE 214 Howard Bidg., ST. LOUIS, MoO. B WE CAN TEACH “ YOU DRAWING in your own home during your spare time. Twenty-five years of successful teaching proves our abil- ity. Artists receive large salaries. Write Today for Art Year Book ScH@L“APPLED ART Room No.2 . BATTLECREEKM an learn by our modern and orig istruction every part of the Watch Repairing home as good or better tl You can earn money while learning well paying position or start in busine pleting our course of instruction ‘ repairers are always in deman« $30 to $70 per week For particulars Weccaste School of Watch Repairing 66 Mason St., MILWAUKEE, WIS. *“STAMMERING - ifs Guse and dire ” You can be quickly cured if you stammer. Send 10 cents or stamps, for 288 page cloth bound book on Stammert: Stuttering. It tells how I cured myself after Stammering Stuttering for 20 years. BENJAMIN N. BOGUE _— 6 Bogue Building, 1147 N. fll. St. Indianapolis 30 Days Free Trial Select from 44 Styles, colors and sizes, famous Ranger bicycles. Delivered free on approval, express prepaid, at rices. You can easily save $10 to 825 on your bicycle. Prices $21.60 and Le $5 a Month °: often mn advan zh! £ sit. Boys a | cirls can ca. Tires: earn small monthly payments. Pay as you ride. oe gt wed = y prices > eawress sremens wheels and equipment, prices. Titss money deb business direct with makers. ———____——— Write today for free | Mead Soman EESE= ay HY Jour easy tery prices and marvel payment term

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w\ 2 : y } POPULAR MECHANICS ADVERTISING SECTION 19 Choose Your Favorite Musical Instrument Master any Musical Instruments Piano Cello Organ Harmony and Violin Composition Drums Sight Singing and Taps Ukulele Banjo Guitar Tenor Hawaiian Banjo Steel Guita Mandolin Harp Claret Cornet Flute Piccolo Saxophone Trombone Voice and Speech Culture Automatic Finger Control arn to Play at Ho me This Quick Easy Way Remarkable new short-cut method teaches you how to play any musical instrument. Aseasyas A,B,C! No tricks—no ‘‘stunts Yet you learn from regular music! —no menotonous exercises! A vour life you've wanted to play a musical d trument \nd now at last—you can realize ition! Just choose vour favorite instru- piano, the violin, the saxophone, what- and then let the U. S. School of prove that you can learn to play it in an gly short time — right in your own home— thout any private teacher. ay be Amazingly Simple Method uu don't know one note from another—even if you r touched a musical instrument in your life before— rkable Print-and-Picture method will enable you to \ith astonishing ease and rapidity. no tricks—no stunts—no long tedious exercises— notonous finger practice Everything is clearly nd simplified so that you get all the essentials of a al education—in short-cut fashion. ir most successful students say that this home isi¢ is real fun— more fascinating than the most game! For you study when you please—and as you ple ASE in your spare time. You zo fs ast or slow t make a bit of difference ‘be ause there isn’t any expen- ite teacher to pay. The cost is the same in every » cents a lesson How To Be Popular can play a musical instrument—you will never feel in a crowd.” For as vou dash off the latest song hit some lovely melody from a well-known classic—you the very center of attraction. You will be flooded with ns You will me i er il people The sooner tart upon this pat! ! irit the sooner will you brighter and happier life FREE BOOKLET EXPLAINS NEW METHOD ur nteresting F his remart yle ¢ ve no talen r drear ed 712 runes Blde.., 7 Ceo ce le - ome me your free book, “‘Music Lessons in ¥ Own e,”’ illustrated rider nd particulars of y ne - r I am interested yllowing course:

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20 POPULAR MECHANICS ADVERTISING SECTION No More Wallflowers, You Can Now Learn to Be a Popular Dancer in One Evening. Here’s How: % 7 OU can have a good time at the next party you go to—don’t sit by and envy others. You can learn to dance the latest steps— overnight—without music or pa‘tner. Dance every step likea professional—and become absolutely at ease on any ballroom floor. Arthur Murray, instructor to the Vanderbilts, is willing to give you the same high class instruction for almost nothing. 250,000 have already taken advantage of this offer. It doesn’t make any difference whether you know one step from another—even if you never danced before—you can learn in a few hours. Mr. Murray is so positive of this that he is willing to send you five lessons FREE as proof. . He will tell you free: (1) The Secre Five Lessons FREE Coupon ‘ouiien: tb Wen ta bee oe of Leading; (2) How to Follow; (3) TOPIC rrr How to Gain Confide nee; (4) A Fas- ARTHUR MURRAY, STUDIO 342 s cimating Fox Trot Step; (5) A Lesson S01 Madison Ave., New York City § in Waltzing. Enclose 10c to cover Send the FIVE FREE LESSONS. | enclose l0e 8 the cost of printing and postage 8 Or COIN my o e postage »rintin . ; oem ae hee he pecape. Orme: 5 anil the lessons will be sent to = . . - s you by return mail. No oblj- § gation. Surprise your $ Name § triends. Write today to . . » ARTHUR MURRAY Addreas.... . . , 5 Studio 342 Jj PER . a . ® 801 Madison Avenue mo. Wicectensecevsseccuses We naceiesinabaitensink s . hasnehnmetsenmmmentenensessetingniateah NEW YORK CITY FREE STUDY AT HOM . Com ator come 4 y tm win aT Tiehest -— bony ( a | at Lessons toate ie by Mail EXAM biggest success in business and public 4 Wonderful home study music NATII i 7 lessons under great American and European teachers. End D At H ome by Paderewski. Master tea: oa Fy tions are neaded by men wi gal training. Ea $5,000 to $10,000 Annually guide and coach you. Lessons a We guide you step by step. You can train at a A py ee ness home during spare time. Degree of LL. B. conferred ‘LaSalle etpdents prac nstrument }.r" Write ing coures re intereste: ing law in every estate. We furnish all Any pas text material, including Toustoon volume 1 Library instru % ey “Ba 7 Public lie heol M one, — ; nee Fay ay RL pass ‘Law Guide’ a Py tem od tin Guitar’ ” oe videne »oks free .Send for them LaSalle ~— — University, Dept. 1264-L i Chicage University Extension te 37 Siegel-Myers Bidg., Chicago G lt The World's Largest Business Training Institutio —=—— TELEGRAPH Y ENCYCLOPEDIA BRITANNICA ya in the New Form—at a saving of 46 per cent THE Morse and Wireless) and RAILWAY AcC( ay NTING taught Geconghty Big ™ . Ww rite for full details . T ‘ ' = salaries; great opportunitic Ot t, large school. Es idorsed by Telegraph THE ENCYCLOP EDIA BRI I ANNICA. IN Railway, Radio, and Governnr E opp wtunt thes to earn ‘ ~ . “ : - large portion. Catalog free pooes's. INSTITUTE. ua St., Valparaiso, Ind. 342 Madison Ave., New York City ] Successful cartoonists earn big salaries. Many of the most popular car- > toonists of today learned to draw in their spare time, at home, through Four Successfu! the Landon Course of Cartooning and now earn $75 to $200 a week. Landon Students From One Village Here is the record of four | —all from Nappanee, Ind | population) —who, after ah } the Landon Course, won nati | reputations: Merrill Blosser is now natio: famous as creator of * Fre and His Friends."’ Henry Maust's work appes' Saturday Evening Post, Cos . a 2 . politan, etc. The Landon Picture Chart Method of teaching ORIGINAL drawing makes car- . “ : ili i : : : Francis Parks, following tooning easy to learn. Hundreds of sketches like the above explain every step in advice. is now a cartoonist for creating ORIGINAL heads, figures, animals, etc. Omaha News. | Write today re ee Landon Picture Spest. long list s successful Landon Fred Neher is comic artist + } students and full information showing possibilities for you. Please state your age. the Universal Feature Co The LANDON SCHOOL, 738 National Building, CLEVELAND, OHIO . _—

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|; ae POPULAR MECHANICS ADVERTISING SECTION asoees fuvers siseial Sr com Encinceas Enuwcers | A ulead NATION Hundreds of Engineers, Elec- tricians and Machinists write us that this Set, Audets Engineers & Mechanics Guides, has been f quick advances in 0SItIOn and pay AY the means « x y Audels aa and Mechanics Guides “ | Guides Tell you all about: THEORY, PRACTICE and |} OPERATION of ALL Steam UNIFLOW and VALVE ENGINES MOBILES, Engines Rotary Engines licator — Lubrica- ACTICAL MAN- VI GAS, GAS Aeroplanes and HOW TOSELECT GINE. STEAM ‘E rules and for- Steam Boilers istion; Fuel and Analysis-CO2 Re- struction of all oilers —Mechanical Oi Burners—Set- neys— Mechanical HOW TO SE- BOLLER—BOILER based on A.S.M.E CODE—OPERA- RING. Pipes, Fit- ting and Ventila- geration—Cooling »ndensers— Distil- \ratus— Elevators topes and Cables ractical Electrical as an aid for ind electricians in i license—ready Loco- larine wlern Electricity idex, covering entire Electrical Worker Daily problems methods are expl ined Every Engineer, Mechanic and will find real help in these are quickly solved. Short cut that save time and labor. Complete, up-to-date information on modern engineering practice is clearly given. Fifteen —— a day of study will prepare you quickly for a better job and better prospects. Pocket Size FREE Flexible Covers - Fyam- ination FREE EXAMINATION . eo am maa $1 a Month 8754 Illustrations * THEO. AUDEL & CO., 72 Fifth Ave., New York Send me for free examination AUDELS ENGID 4750 Pages MECHANICS Gi IDI s to send $1 in 5 da ind $1 books. “With the Set, I help of your am holding a posi- tion of chief engineer, and am under 21."—J. F Hoffman, Columbia City, Ind. No obligation to buy un- £ , month until paid, Name Addres c tior less you are satisfied. Not Occupa a cent to pay until you see the books Use cou- pon now and start on the way to better pay. Employed Reference VEERS AND S Numbers, $1 If satisfied, I agre

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22 POPULAR MECHANICS ADVERTISING SECTION DON’T SLAVE ~— ~ EARN! $3500 to *5000 a Year 3 Months’ Training Will Qualify You for Success in the Professional Trade— MECHANICAL DENTISTRY Unequaled Opportunity for men who like to use tools. Right now 2,500 more Dental Mechanies are needed and the demand is rapidly increasing. Ap- proximately 56,000 practicing Dentists in the U. 5. and only about 4,000 full-fledged Dental Mechanies. You Learn by Doing We train each student individually—no classes whatever— using the tools of the trade and you learn on regular dental work. But we do not make the serious mistake of depend- ing on practical work alone. You are given theoretical training as well so that you become familiar with both the theory and practice of Mechanical Dentistry and with the methods and terms used throughout the profession Bodee-Trained Men Lead the Field Unequaled Curriculum For over 30 years Bodee Schools have been the chief source of supply for well-trained Dental Mechanics and the Dental Pro- fession is constantly calling for graduates of this institution. Just ask your own dentist to examine the curriculum with you. Compare also the moderate cost of this course with the charges of other schools FREE PARTIAL SCHOLARSHIPS In order to meet the urgent demand for the men we train, we are offering for a limited time Free Partial Scholarships. Be sure to ask immediately for this exceptional offer: It will very much reduce the cost of your training. Remember, this offer will be discontinued soon—so act NOW while it is still in effect. SEND FOR CATALOG AND SCHOLARSHIP OFFER Catalog No. 2 fully describes the field and why the demand. Shows how students “Learn by Doing” actual work through practical, individual instruction, day or evening sessions. Shows how you can “Earn while Learning.” This catalog is your First Step to Success in Mechanical Dentistry. IT IS FREE. SEND FOR IT TODAY. BODEE DENTAL INSTITUTE 136 West 52d Street, NEW YORK PHILADELPHIA BUFFALO 1305 No. Broad St. BROOKLYN 1226 Main St. § 85 Court St. TENOR FREE? BANSO nf (WORTH py YOU CAN PLAY IT IN 30 Bet 40,000 successful students back up our guarantee —y you can play a wipee | in 30 minutes by following iy You get this $18.00 TEN R BANJO, FREE, “as soon as you enroll for 52.easy lessons. ‘New low prices and easy terms! PICTURE LESSONS —~ + IT EASY You can’t fail to learn because t ne plowmes explain every move. You don’t have to able to read notes. than oral ay We teach you in the largest conservatory, by mai PLAY FOR FUN OR An. Don't be a a 2 Get in on parties. —-> ro friends. ey Play for dances, orm an RI 52 lesson course will mn + pert. Earn money in spare time WRITE vou. preetat, FREE OFFER Famous teac' ae 1 explain how we can positively teach eo AY =... You get , J free $18.00 Tenor ~ og with t lesson . while you play Oy eer apestel somes Bh ‘famous teachers jor Hawatian Gutiar, Violin, Banjo Utelole Ukelele FIRST HAWAIIAN CONSERVATORY OF MUSIC, inc Weolworth Bidg., Dept.60, New York, N. Y. . Course for men of ambi- ELECTRICAL tion and limited Over 4000 men tr Condensed course in Theoretical and Practical Ele in¢ ENGINEERING ::: subjects of Mathematics and Mechanical ena A t by experts. Students construct motors, install wirins electrical machinery. Course complete IN ONE YEAR i-stablished in 1893, Prepare for your professior the most interesting city in the werld. Fb re« eliss ELECTRICAL SCHOOL Takoma Ave. WASHINGTON, D. C. No gg A or experience necessary. Fascinating work. ays big sete instruction book telis about Kiphabets. ay iors, How 7 my Paints, Show C be ny oard and W Signs, Ready the Trade, ~- thay: aon 100 A 3 and signs. Book bound in flexible imt leather-, gold edges. and four hall bearing Show Card ¢ : ([) Pens. Sent postpaid $3.00..C.0.D.)10c ex. p) £) Ogilvie Pub. Co..57 Rose St. Oept.50. W.Y. City EARN MONEY /MMEDI/ATELY~-~ _ WE FURNISH EQUIPMENT TO START: LEARN ACCOUNTING Bryant & Stratton NEW Training System fits you to « money. learnin your own home. Short course for eve New method TELLS HOWandSHOWS HOW. Full credit ¢ Chicago school for all we under OUR NEW TRAININGS) VRITE TODAY! BRYANT & STRATTON Sueqess Coessce 116 S. Michigan Ave. hica Joy~CT0M OMACH for UO UFFERERS I positively guarantee Macerated Wheat to re“ ve th: cases of stomach trouble and banish constipativn or you nothing. Soothing to a weak stomach as a pou inflammation. Stavsd>wn and nourishes. Testimonials number. My reputation of 25 years backs my cuarantee. Write BYRON TYLER 172 Gibraitar Bidg. KANSAS CiTy ™“° ————EEe

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POPULAR MECHANICS ADVERTISING SECTION $1000 REWARD For the Capture of This Man ONVICT 6138. escaped from the State Penitentiary; Name, Charles Condray; Age, 37; Height, 5 ft. 8 in. Weight, 141 pounds; Hair, light brown; Eyes, gray. y enough to identify him from his photograph and lescription, you may say — but, Condray took the if “Brown’’, dyed his hair, darkened his skin, 1 mustache, put on weight and walked with astoop. he was captured and identified so positively that new the game was up and returned to the peni- iary without extradition. v was it accomplished? Easy igh for the Finger Print Ex- rhey are the specialists, leaders, the cream of detec- ing dangerous criminals. More Trained Men Needed he demand for trained men by governments, states, es, detective agencies, corporations, and private eaus is becoming greater every day. Here is a real ortunity for YOU. Can you imagine a more fasci- ng line of work than this? Often life and death pend upon finger print evidence—and big rewards to the expert. Many experts earn regularly from 100 to $10,000 per year. Learn at Home in Spare Time i now you can learn the secrets of this science at 1e in your spare time. Any man with common hool education and average ability can become a Why dont You b Y Oni i0u DE a Every day’s paper tells 4 e pon now. You may never r wonderful exploits in solv- t la see this announcement again! mysterious crimes and con- ngel ji $ You assume no obligation Finger Print Expert in surprisingly short time Free Course in Secret Service For a limited time we are making a special offer of a 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 until this offer has expired— mail the cou- you have everything to gain and nothing to lose. Write at once — address University of Applied Science Dept. 13-59 1920 Sunnyside Ave. Chicago, Illinois UNIVERSITY OF APPLIED SCIENCE - Dept. 13-59, 1920 Sunnyside Avenue, Chicago, Illinois Gentlemen: — Without any obligation whatever, send me your new, fully illustrated, FREE book on Finger Prints and your offer of a FREE course in Secret Service Intelligence and the Free Professional Finger Print Outfit Name Address.

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24 POPULAR MECHANICS ADVERTISING SECTION Men Needed in Electricity O PROFESSION offers greater opportunity to-day than Electricity. Salaries of $12 to $30 a day are not uncommon and the opportunity for advancement is unlimited. As Forrest Crissey said recently in The Satur- day Evening Post— ‘The demand for dlettsicel work is increasing immensely and electrical con- tractors assert that the supply of electrical workers cannot overtake the demand for several years.” Now is the time to prepare for a good position in this profitable, interesting profession. You can study right at home in spare time through the International Correspondence Schools—just as so many other men have done. The I. C. S. Elec- trical Courses have been endorsed by Thomas A. Edison and Charles P. Steinmetz—the late elec- trical wizard of the General Electric Co. Just mark and mail the coupon printed below and full information about Electrical Engineering Electric Lighting, Electric Wiring, Electric Rail ways, Radio or any other work of your choice will come to you by return mail. Mail the Coupon To-day = eee eee eee TEAR OUT HERE om eee eee eee eee coe INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5658-D SCRANTON, PA. Explain, without obligating me, how I can qualify for the position, or in the subject, before which I mark X. ELECTRICAL ENGINEER ] CHEMICAL ENGINEER Electrician r Pharmacy Electric Wiring SALESMANSHIP Electric Lighting Show Card and Sign Painting Electric Car Running RAILROAD POSITIONS Heavy Electric Traction ILLUSTRATOR Elecirical Draftsman DESIGNER Electric Machine Designer BUSINESS MANAGEMENT ——— ih Expert if Private Secretary Business ~ yes MECHANICAL ENGINEER BOOKKi Mechanical Draftsman er and Typist oolmaker Cert. Public Accountant Machine Shop Practice Traffic Management Gas Engineer Commercial Law OIVIL ENGINEER —— ENGLISH Surveying and Mapping mon Stoel Subjects Reading Architects’ Blue Prints civic SERVIC METAL re Railway Mail C lerk ARCHITECT Lj STATIONARY ENGINEER Sochinetenel Draftsman +4 Textile Overseer or Supt, PLUMBING AND HEATING Navi ULTURE is Spanish Sheet Metal Worker Navigator Math’m't's LL] Automobiles Poultry Raising §_) RADIO Name—__— — = Present Rusiness a Occupatior Adére>.- ———- Street and No — - - — City ———————————————————————— State— — Canadians pm ed send this coupon to International Correspondence Schools Canadian, Limited, Montreal, Canada Drawing Easily Learned Haven't you often wished that you could toons, illustrate some idea, sketch face, ete.? You can do all of these of America’s most famous Cartoonis trators has developed a great, simp: ao ten success in all branches of Commer: : system has revolutionized the en: of drawing. It means that draw as easy for you as writing— mu than learning shorthand, bow! typewriting We are now p original system for learning Art and Cartooning, consisting of 34 les 8 with over 500 illustrations, within reach of « If you will devote a few hours each w: to th Course, WE ABSOLUTELY GU ARAN "that you will learn to draw and draw well b have half finished the Course. If we fail " this e ‘laim good, we will re fund every cent paid ue By eliminating a large office force for a1 werit correspondence, expensive catalogs, et: ve te enabled to make a price of $2.98, the « capest price ever known for a high-grade hom. study course. Many have sent us letters sim) that of Robert P. Davis, of Detroit, who w can’t see how you ask so litt others with inferior Courses get from ¢ $60 for theirs. It is more than I exp Learn to draw. It is a big asset, no matter what field you Send No Money [EREp cao Just order the Course, and on ar- Course a we rival pay the sme ly we will incl ‘ ‘ ival pay the postman only $2.98 nelude a d plus a fewcents post- outfit, consisting of S« wher a ted age, payment in full for the entire pencils, pens, paper + Cyjurse and Free Drawing Outfit. ers, thumb tacks. et if not entirely satisfied, return ablin u to Zo within five days and we will RE- aednaninnae bs ate , UND MONEY. Address Seen Lederer School of Drawing, Dept. 368-C, Chattanooga, Tennessee Orders from outside the U.S. are payable $3.24 cash w TEARN WATCHMARING ==> F NCRAVING ; ALSO JEWELRY REPAIRING BY OUR PROFIT-SHARING PLAN OUR GRADUATES eee One of our lowa students started in a very emall way ing over $30,000 « year Another in Wisconsin, ove first year. Day or night classes. Write for FREE Bi CHICAGO SCHOOL OF WATCHMAKING Dept. 20 4844 Lincoln fom HICAG Can afford to or STUTTER It ruins many chances for promotion. Send postage for large free book * “The Correction Stammering and Stuttering."" Methods successful fo wer a quarter-century E LEWIS INSTITUTE. 33 Lewis Bidg., 155 Stimson Av., Detroit, Mich., U.S.A A FE NOTA PLE Stop Forgetting Make Your Mind an index from which you select facts, figures, names, faces. Develop concen- tration, self-control: overcome bashfulness, forgetfulness Write today for FREE memory and concentration test and iMustrated booklet, “How to Remember.” PROF. HENRY DICKSON Dept. 70512 Evanston, Hl. PIMPLY madeWELl When a few applications of this eeiee- 4 working lotion has cleared faces of pimples, “2 blackheads, acne eruptions on “44 4 the face or body, barbers itch, eczema, enlarged pores, oily‘: | j or shiny skin, you can realize why / © CLEAR-TONE has been tested and approved in over 100,000 Test Cases. “. | simplicity of the treatment, and The 5 How I Cured Myself are all ex- -/ aatne i in my free booklet, “A Clear- ‘one Skin.”’ Write for your copy og | ™, day and learn of the results gotten by thousands of men and women. E. $.GIVENS, 128 Chernical Bidg., Kansas City, ™ ; | | oT

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| i Led | -— ser a || POPULAR MECHANICS ADVERTISING SECTION Quick Success in Aviation Fascinating—Daring—Big Paying 1¢ men of daring, no other field of work teresting book that tells you things you have S such a fascination, such high pay, norsuch always wanted to know. Only one hour each ities for quick success as the field of evening will give you the basic training in a As yet, aviation is practically in its in- surprisingly short time. You need only a common NOW is the time to get in. school education. One of my stu- Amazing Opportunities dents, James Fowers, a.,SaySs, ‘Lz ndeec in Airplane Industries oiiscitit sucha valuable Course can automobile industry and in the moving i ted fromm ene iness hundreds of men got rich by getting thal , ‘start. They made their success before a a o eaten — ‘ke up. Today, these lines offer no greater ‘* ; ; ew Seven-Passenger Airplane ities than a hundred and one others. BUT Personal Instruction by [ON IS NEW. Get in while the opportunity All over the country there will be a clamor Experienced Men d “i ro Pant ot se = oad Men who have had actual expe- ee ee = rience give you personal attention Here are Real Positions |) (irae They select the lessons, lectures, —$50 to $150 Per Week blueprints and bulletins. They tell Aeronautical Inetructer, Acvenaubleal . you things that are essential in every Engineer, Aeronautical Contractor, F day practice. Each lesson is easy to _ Airplane Repairman, Airplane — pe read and understand. Mechanician, Airplane Inspector, ‘irplane Salesman, Airplane Assembler, - - ~ BIG BOOK Airplane Builder View in av Airplane Factory ala of Opportunities A Sure and Easy Way to Send coupon below for New Book, just out, “Opportunities in the Airplane Industry It is interesting and instructive Learn A iati n t Hf It will show you many things you never knew before about V oO —a ome aviation. Due to shortage of paper we could get only a limited supply of these books— send the coupon before they are all gone The study of avia- tion is almost as fas) AMERICAN SCHOOL OF AVIATION cinating as the actual 3601 Michigan Avenue, Dept. 13-59, Chicago, Il. work. Every lesson is full of interest. That is why it is easy to titties mies aigite 1 Free I learn aviation. You ‘ do not have to make ee A New Job—The Aerial Postman YOurself study—it is like reading an in- Street = gp City

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POPULAR MECHANICS ADVERTISING SECTION EARN POSITION _ GUARANTEED ‘i Teach by Mail I can make a good penman otyou at home during spare time. bo wintte youliv or how poorly you bow wr y Slmplitied system has own ti INSPECTOR the way to good penmanship duri, Past twenty-five years it ¢€ AN . WILL do the same for YOU . My beautifu Hundreds of successful inspectors A illustrated . earn good money, in highly confi- | ty vig / Book dential positions, with many op- ment I ve an sit montis | “How to Beco —— for advancement. THOS C SWOPE. Rt 2 Gillewpleville, = a ae ee ae ; > | a Good Penman 1 electr ire constantly i ote ; FREE!! 1s tor rained I! It contains many beautiful specin e Hy ; enmunship showing what others! Fascinating Work ener nee ew ] W. A. Judson states I find Traf- Oe ee fic Inspection the bes nee travel ne r postage La ‘ taughtas succe weal as men. Write Today. Ad } f nt 7 . W. TAMBLYN chances flor advanceme ; 418 Ridge on Kansas City, Mo., U.S.A nother graduat ' do etur! ind see e country » en $s wondertul ny ing, healthful, to travel or ren Unlimited Opportunities Nothing long than, 21 Ruy and Sapphire omelet \ Quintana, another ~raduate, sa good enough for the Burlington maste “Thave been working in my ;resent posi- Quality aud Style tion for over a year and the manager 1s we Adjusted to the second fempereture—tecchren- satisfied with my work ind I have already ism—positions. 25 year Gold Strata Case, in 100 99 quisite designs . Balance in oma received an advancement in salary monthly payments. $e free book. Watch J. W. Mensinger ste es: “* My work must Bu ington be satisfactor my wages have been in- rli Comoany ye Sa 4 y as my wag : : 2: 19th Street and Marshal! Boulevard creased There are great opportunities for Dept. 93-59 Chicago, tlinois first-class inspectors 1nd my advice to any one wishing such a position is that he wil make no mistake in securing a training ir your school Make folks smile while you make big money A. A. Quintana Start al $110 per Mo. for yourself Our Cartooning torr Art Course enables you to ARN AS EXPENSES PAID IZEARN Individual criticisins by a nationally |} Known cartoonist given on each lesson W rite | today for outline of course and our special plan POSITION GUARAN — for enabing you to earn as you learn. Prepare at home in re tis Aft , THE OHIO SCneot OF COMMERCIAL ART e 10 In spare ‘ 1719 Euclid Ave. Cleveland, Ohio pieting course in three nth iverag time) we secure you a poetrem gooey 4 a’ | =| guen WANTED rhere are hundreds of openings. You take risk! The train- Prepare as Firemen, Brakemen, Electric Te — > — = _s Motormen, and colored Train Porters. |! put to work—good wages to start on desired necessary. 500 more wanted. Name position you want Mensinger moderate; terms if neat coupon for free Book- / ee RAI WAY INSTITUTE, Dept. 4, INDIANAPOLIS, IND infor . ut ~ 7 eee Comedies, Dramas, Vaudeville Acts — R Musical Comedies How to Stage aP y ° Tp, and Revues, Min- Make-up Go Standard Business / strel Choruses, Songs, Blackface plays. Everything Burnt Cork Shows and All Amateur rot t Training Inst. ya Monologs, Dialogs, Speakers. CATALOGUE FRE! T. S. DENISON & CO., 623 So. Wabash, Dept. 9%, CHICAGO BUFFALO, N. Y. ——— — — — MAIL TODAY — — —-—— Standard Business Training Inst., Buftalo, N. Y. SA PLAY PIANO BY EAR Send me. entirely free, Booklet No D- 63 giving full pa ‘ulars , Play popular song hits perfectly about course in Railway Traffic Inspection tune, play ict by ear. Self-ir teacher required No tedi.« daily practice - just twenty brief ing lessons which you master At Home im Your Spare Time > Send for FREE BOUF ear 3 many styles of bass ar / -trick endings ¢ brings interesting CH NIAGARA SCHOOL OF MU si + 702, Niagara Falls.

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Every Week! 4 other crack William McClintock, President Master whi il: _ ee emery 2 of Chleaso 2nd proprietor "Nh Te trans -continental "y of the highest priced rentod shop in the sui mitt barters. world, says, ‘‘ My son, who learned at Moler’s, p! i HN iental Limited” is top man in my shop every week. I gladly recommend the Moler System as the | place for men to become successful bar vs —WwM. McCLINTOCK. BE A “WHITE-COLLAR” MAN— Earn $90-$150 a Week—CLEAN Money! use of doing dirty, greasy, hard work, when you make TWICE as much money in a manly pro is CLEAN, profitable and full of opportunities? Easy to Learn— a plicat ! ali t the st s Quick to Earn! Barbering cashede inctud Me [-lectr ir cutter the mecha - BERING for YOU! xd the latest v« tof it all is thi 1 ladies’ } Ar b obbing MOLER bering, as taught the ler ‘ oeret train | . y ; ; LER vay mak« icdie marcelling and an eas\ ' stic, Levia- r Barber in a shor ractical course in the treatment on et te Ship- tensive training uf { skin diseases pay oa Bp gy Be iC P ng nes all carry n Boss, if you wish op, which we will Earn While gic Learning! Seethe World,Too! = “Where there's a Will there's : ‘ coi Way toearn BIG pay! Write t efer, we willhelp you the nearest MOLER Colk il job, with good pay j ft . desat there is one near you, and icarr ifter you graduate , ' . u prac how you can earn while you lear crack trans-conti- the ° arber trade Ask for the ger trains, big luxu- new FREE MOLER Barberir ind sky pp gh all Backice B. Find cut HOW r Sh a ‘ oe ee MOLER helps you help yourself - R aaa AFTER you graduate, as well a , . BEFORE! Find out why MOLER Men are making a Graduates DOUBLE the money others made last year, before Ladies’ Shingk re Always Busy? = Bi 2c0" pebre Leds Ss rained Men are always You're NEXT in line for big pay weference, for they —the MOLER way. Send Cou the valuable, thor- non TODAY!

MOLER SYSTEM OF COLLEGES MOLER SYSTEM OF COLLEGES << 4¢4ress Nearest Branch Street Address NOT Needed) 30 Branches in United States and Canada Please send me without obligation on my N Y Denver, Colo Dallas, Tex Booklet B M Omaha Neb or Houston, Tex 7 Milwaukee, Wis San Antonio, Tex New Orleans, La Seattle, Wash Atlanta, Ga Tacoma. Wash Memphis, Tenn. Spokane, Wash

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28 POPULAR MECHANICS ADVERTISING SECTION High ‘School Course in Two Years! You Want to Earn Big Money! And you will not be satisfied unless yc-1 earn steady pro- motion, Rut are you prepared for the job ahead of you? Do you measure up to the standard that insures success? For a 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 you all the essentials that form the foundation of practical business. It will prepare you to hold your own where competition is keen and exacting. Do not doubt your abili- ty, 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. | H974, | Drexel l Ave. and 58th St., Chicago

American School Dept. H974, Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. .. Architect --.-Lawyer .Building Contractor ....Machine Shop Practice .... Automobile Engineer ..--Photoplay Writer ..--Automobile Repairman’ .... Mechanical Engineer ...-Civil Engineer ....Shop Superintendent .... Structural Engineer ----Employment Manager .... Business Manager «+». Steam Engineer ...-Cert. Public Accountant ....Foremanship ....-Accountant and Auditor ....Sanitary Engineer .... Bookkeeper ...- Surveyor (& Mapping) ...-Draftsman and Designer ... ‘Tdeshons Engineer “-* ...-Electrical Engineer .... Lelegraph Engineer ..-.Electric Light & Power ....High School Graduate . -.-General Education ....Fire Insurance Expert .. Vocational Guidance ««».-Wireless Radio ..Business Law ++»-Undecided PNG sctaisans cccseccesooosococcccocceccocee soccenceeese BOOED 6 cccccceses

epi Cpe peering v imeaelths oe . =r

We Teach COMMERCIAL ART Meyer Both ey the largest Godkanorcial raanisation 2 in the World =, you a practical training base upon twenty- -five years F sees This nationally i:nown organization each year produces and sel to advertisers over 15,000 commercial drawing This well paid profession equally open to men and women. Home study instruction. GetFactsBefore You ¢ tn Ae Wis. MUSIC LESSONS FREE IN YOUR OWN . HOME Piano, Organ, Violin, Mandolin, Guitar, Banjo, = Beginners or advanced players. One lesson week!ly. Lllustrations mak« jain. Only expense about 2c per day to cover cost of postage and 6 eed rite for FREE booklet which explains everything in full. AMERICAN SCHOOL OF MUSIC, 5 1 Lakeside Building,C WICASE Wante Men and Women to Learn Photography! \ Photographers and Photo-Engravers earn $200 to $ month. The field is uncrowded. Learn these prof and fascinating professions. Taught by largest ar colle re of its kind in the world. Established over 30 Demand for our graduates far exceeds supply. ‘ positions secured. Tuition and living expenses low 2 Write today for Get this FREE Book! beautifully illust book describing wonderful opportunities in this fir IMinois College of Photography, Box 4124, Effingham '''

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POPULAR MECHANICS ADVERTISING SECTION ionally id sel wing b **The Supreme Authority’ WEBSTER’S NEW INTERNATIONAL DICTIONARY The Merriam Webster erever the importance of correct, forceful English preciated, there you will find this standard authori- —in office, home, and study. A complete reference ry in dictionary form is this one big volume, valent in type matter to a 15-volume encyclopedia. inds of the new words people are using are here g the 407,000 vocabulary terms. The biographical m gives you information about 12,000 famous men women. ‘There are 32,000 geographical entric 6,000 fine illustrations. Surely it is a work you have—and now is the time to get it for you may with it the 1924 Atlas — Free plendid Reference Atlas of the World is offered thout charge to those who order now. Jt contains +6 pages—96 pages of colored maps with all recent ges in the countries of the world, new census » parcel-post guide, etc. This free Atlas and great Merriam Webster will be Delivered for $1.00 approved orders and you may remit for the dictionary easy monthly payments thereafter. Send the coupon to-day and get the booklet ‘“The Magic of Words’’, free, and full information about our present special offer. G. & C. MERRIAM COMPANY Dept. S., Springfield, Mass. ” Mowe Coils: People Judge us! Before we have spoken a dozen words in social conversation, the men and women whose respect we prize have passed judgment upon us. Accuracy and power of expression win their admiration; errors and uncertainty lose it. The same standard is accepted in the world of business and the pro- fessions. Our use of English de- termines our success. ‘That is why intelligent men and women draw constantly on the highest authority of English expression—WEBSTER’S NEW INTERNATIONAL DICTIONARY. Read this Interesting Booklet It is Yours on Request “The Magic of Words’’ There is magic in words rightly used and this booklet tells, with many inte: esting illustrations, a story about what words can accomplish. It gi you also information you will be glad to have about = Che Merriam Webster. 4 The Coupon Brings Your Copy Free Pn eeccee seaseery >. & C, Merriam Company, Dept. S., Springfield, Mass. Please send me, without cost or obligation, the illustrated book- let ““The Magic of Words’ and full information abo Webster’s New International Dictionary and y special Free Atlas offer. ; Pop. Mech Name Street City and Stat it if

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POPULAR MECHANICS ADVERTISING SECTION | Do You Make $95 a “Every hour Course has be« position, my $ home, my fami all to my sp: the Internati Schools!” Every mail b of the thousan telling of pron salary as the study. What are you after supper? them slip by 1 can easily mak: One hour a day will prepare yo want in the wo it will! Put it Mark and mail INTERNATIONAL CC Box 5660-D Without cost or obligation, position or in the subject BUSINESS T C) Business Management () Industrial Management | Personnel Organization the 5 l'raftic Management L) Business Law Littanking and Banking Law Lj Accountancy (including C. P. CN n Cost Accounting owe Wem to Go > p Op ing LjCommon 1 School Subjects | i. IPriva ate Secre ae : L) Hi h School Subjects to work or school and recreation is on a Ranger J . Uspanish ] Fren O1 strating 0 Cartooning bicycle. You can have your choice of 44 Styles, f TECHNICAL AND INDUSTRIAL \ ees colors and sizes. 30 DAYS FREE TRIAL. Express O Electrical Engineering Archite wid. Factory-te-Rider bicycles from O8- coup. : ft lis ve ime an carta sk paola ons heing q Architects’ Blue Prints pt the small monthiy pay- L) Mechanical Engineer (} Contractor and Builder ments. Parents often advance first payment. ‘by’ Mechanical Draftsman () Architectural Draftsman est quality, at factory prices, express id. \e b Machine Shop Practice C)Conerete Builder mos. whee end eqs pment. low prices. od (' LD Railroad Positions C) Structural Engineer Money do business direct w ~ [Write today for free i )Gas Engine Operating by Chemistry C) Pharmacy Ranger Catalog, fa Civil Engineer L)Automobile Work A- CHICAGO |i 4 Lh ya Surveying and Mapping LJ) Airplane Engineg DEPE 108 Lous cosy perne— UL) Metallurgy Navigation CL) Steam Engineering Agriculture and Poultry CiRadio Mathematics Name eocecccscccccocccce: NOTICE—All men. women. boys Street girls. 17 to 65. willing to accept Address oe Government Positions, $117-$300 s monthly. traveling or _ station STINE. ot vndaiousipnnndnbeiiaiieniainmamiiaiadinil a Occupation Persons residing in Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada, time you speak or write Mistakes; in English you show just wi sin Englist veal you 4s a person who lacks educ er Lack of language power prevents you fron entin our thoughts in the strongest possible way itter what you do, real command of English will he uu to your goal Stop making mistakes in spe punctuation, pronunciation, increase your vocabula _ WONDERFUL INVENTION Only 15 minutes a day with be erwin Cody's new inven« TO tion—and you can actually ur English dm farn | it teaches by H- ABL1—imakes it easier to lo the RIG HY (want | wavy Wandarful colt «- ary St Louis, write Mr Ozment, !11, Mo AT ONCE

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POPULAR MECHANICS ADVERTISING SECTION lassiied Advertisements WORLDS BEST WANT AD MEDIUM tisements in this section, 25 cents per word, each insertion, minimum 10 words, payable in advance inserted under proper classification in January issue, copy should be in our office November 18th. MILLERITE- ETHYL- -Super-Fuel Ingred- PATENTS Write for my free ’ largest newspapers and maga- | Increases Power and Mile- Lb H to Obtain a Patent and é Make it yourself by my vention and Industry’’ and Record simple Formula and clean up five to fifty vention’’ blank before disclosing inver y This and eighteen other Send mode yr sketch of your inventi Vromptness assured. N ting down the cost pera *, ignition, transmi end today and get thx ok Free. Ford Ow:er ne, 548 Montgomer) | an article that de tively? Agent-der re. HL FP. Geist, Oa! \ Tops for Ford k Stylish—Nolseles - m in Winter. Ea Quality. Low Pric« AUTOMOBILE SUPPLIES ition. Clarence A nt Lawyer, 589 Securit tly across street from ston, D. C. See p tomobile Eneyclopedi greater than ever earranged. Contains obile facts ever pub! *parate books containins t $21. Over 1200 page th $6. Flex. Amer Popular Mechani Ontario St.. Chicag ice for automobile. s ready to install. A! its any make old or : With our device, th iis own motor. Every « Terent from another idorsed by automo) il« your order. 4.50 Box 106, vanst FORD OWNERS Book Free: A very « ‘ated book explaining m most every part r this book free wit! iption to Ford Owr ie—at only $1.00 ie Ford ear should ff about 200 pages tins the things you Koupet Auto Top « ©” Airburner.”” Fo: ‘arlaw Sales Co., Chicago. 4 ? speedster bodi« fee Ad. Page 171 Jc with “RKO” = ed-i-Kut” ad page rs — Stop grinding guaranteed, Re ‘hree Ring Valve ‘ id St.. Newark, N its than any ordi Kimo Mfg. Co., Buffalo, : x a "oo ——, ge = “DISTRIBE "TOR entire state we Pennsyl- wt Bao on soe ry og ord F merit. —— a Smooths out worn timer shells. P . ~ . ’ tact t , t ; nark—uses nobiles made Controls ont : Hi Fh ge 40. ark. use milli n Automobile Owners | (caring surface, at teenie thaek ain 4 Stores, Service Stations, | ney 4 - - - Elir 5 ar 1 in lividuals. Do you want Y ir By i. we par vigorously to this list 17 Ball Orde spective Buyer f so sub- tee eo. - ‘sideration sample, full details | . ,* - Mfr D Prices based on State Wide | : Service James C Johnson, | PROFITABLI Busir s Quick Ave BR fla | One Day tatters Service $146 _ Write us Hobros Troy AUTOMOBILES FORD Battery Cables " Write for | Corrosive Connector Any ar Invention Sent Postpaid for $1.00 t inventior Ser Hiawatha Sales Compar p ae a MOTORCYCLES, BICYCLES AND " Rea SUPPLIES ages 164 SEND f _ Bargait B 18 Nir Mons Sa —_ MI ; It - mone} M é Side Car ing ‘ P ‘ Wi R P iA h, Mt. Sterling. K ed t noe St ae , Ba tter Chargir Kring A Mot f ecialt . igger pr Costs $1 ) ' ” ‘ rican M » 4

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an Hour! hour T has been $95 ‘Every Courss position, spent on $95 my I.c. 8 worth to me! My my $5,000 year income, my home, my family’s happiness—I owe it all to my spare-time training with the International Correspondence Schools!” Every mail brings letters from some of the thousands of I. C. S. elling of promotions or inc l salary as th rewards of spare-tim study What aiter them student reases doing with the hours supper? Can you afford to let slip by unimproved when you can easily make them mean so much? One hour a day spent with the I. C. S. will prepare you for the position you want in the work you like best Yes, it will! Put it up to us to prove it. Mark and mail this coupon now! are you ee INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5660-D, Scranton, Penna. Without cost or obligation, please tell me how I can qualify for the position in the subject before which I have marked an X BUSINESS TRAINING COURSES (C) Business Management Salesmanship [ } Industrial Management Advertising ]) Personnel Organization ) Better agate rs

() Traffic Management how Card Lettering Lj Busin 3s Law ]Stenogr ray h y and Typing LJBanking and Banking Law Business English L)Civil Service )Railway Mail Clerk

{J Accountancy ( ine luding C.P.A.) Nicl ( \ccountir LJ RBookkee ping ommon School Subjects L) Private Seer tary 7 h School Subjects Spanish Frer C)fllustratin 0) Cartooning TECHNICAL AND INDUSTRIAL COURSES (Electrical Engineering [] Architect Electrie Lighting LJ Architects’ Blue Prints Mechanical Engineer C} Contractor and Builder LJ) Mechanical Draftsman } Machine Shop Practice D Railroad Positions Gas Engine Operating (J Architectural Draftsman () Concrete Builder ()Structural Engineer LiChemistry ([) Pharmacy f Civil Engineer | Automobile Work Surveying and Mapping LJ Airplane Engines LJ Metallurgy Navigatior J Steam Engineering As erie aiture and Poultry

CRadio J Mathematics Name Street Address RE issisesarimniaeaniinnnniiiel State Occupation Persona residing in Canada should send this coupon to the ; Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada, POPULAR MECHANICS ADVERTISING SECTION

Do You Make Mistakes in English’ very time you speak or write you show just what takesin Eenglishreveal you as a person who lacks educ ent Lack of language power prevents you fror senting your thoughts in the strongest possible wa what you do, real command of English will he ou to your goal Stop making mistakes in spellir punctuation, pronunciation, increase your vocabula WONDERFUL INVENTION

natter

~ . —_ Only 15 minutes a day with Sherwin Cody's new inver ion—and you can actually SEE your English improv {s It teaches by HABIT makes it easier todo the RIGH’ wa) Wonderful self-correcting lessons include Spx t ing, Punctuation, Grammar, and Expression " oer. BOOK ON ENGLISH ‘* AND as MINUTE TEST . hove " : . & oho I i M . take i y WRITE Now Addr Sherwin Cody School of English, 512 Searle Building, Rochester, N. y $

LEARN WATCH REPA IRIN

Be a watchmaker—you can learn this profitable trade by correspor ade nee in a few weeks in you own home by the DeSeims Chart System. Afte you complete the course you will know a watch _— from Ato Z. You will know just what the matte is and how t epai c When you graduate y wi — be a Practi al wateh er and repairer and pe : ent "= ns for craduat Ask for our Free Book it explains our system and forms THE DeSELMS WATCH SCHOOL 23 Perry Street ATTICA, INDIANA Learn Expert Auto Paintin There is Big Money in auto pa refinishing. Our Home Study Couns in Practical Auto Painting ¥ you to do the finest work a r money,or come here for training un- e der our experts. W onderfu ; FREE “ cular tells all about big nev business. Be first, W c CHICAGO COLLEGE OF AUTO PAINTIM Painting Dept. 124, 140 S. Dearborn St.,CHICAGO,U.SA } 4 * c Finger Print Everything you need to g practical experience in finger —_ work while you are training to be — great Finger Print Expert. The Big M ger Print Experts and secret service men are who know the finger print branch of this profess to learn in spare time at home. Write now for I U. S. SCHOOL OF FINGER PRINT, 7003 North Ciark Street, Dept. 13-59

HICAG = ~ - i‘ 4 . A . if ( cisosean OF Sica Dann nes wi PROFESS CHACULAR FREE “BALDA ART SERVICE, ‘Qi, 0 OSHK -

C to work or school and recreation ison a Ranger J bicycle. You can have your choice of 44 Styles, f colors and sizes. 30 DAYS FREE TRIAL. Express prepaid, Factory-to-Rider bicycles, from $21.50 up. $5. if desired. Saved time and carfare easily meets the small monthiy pay- ments. Parents often advance first payment. best quality, at factory prices, express p id. La mp. whee — sous pment. low prices. Send < —— No Money co business direct with mal — Won Today at free oa a r¢ Mead snr’ tory prices and mar DEPE. 4; CHICAGO | loun easy payment terms

women boys to accept NOTICE—AIll men girls. 17 to 65. willing Government Positions, $117-$300 monthly, traveling or station ary write Mr Ozment, !11, St Louis, Mo AT ONCE

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POPULAR MECHANICS ADVERTISING SECTION 33 assitlied Advertisements WORLDS BEST WANT AD MEDIUM rtisements in this section, 25 cents per word, each insertion, minimum 10 words, payable in advance e inserted under proper classification in January issue, copy should be in our office November 18th.

AOVERTISING AGENCIES MILLERITE-ETHYL-Super-Fuel Ingred- PATENTS Write — - ient for Gasoline. Increases Power and Mile Book How to O age—Saves Gas Make it yourself by my ventior est newspapers and maga- steapee Formula and clean up e to fifty venti No. 30 sent free. Ankrum housand a year This and eighteen other Send 299 W. Jackson Blvd High Class Automobile Specialties described instruct ~ . y > DI a. » é 4 nake on you casuinn. Sane Wenntehee. ling 1 etos $15; Ford retopping, $4-$6; ; 2 up. Brightman Auto Ex- George Salced sox “Windsor Ave.. Hartford, Conn [SING Cuts, any wording, de a be FOR FORD OWNERS . Er FORD Re wok Free A very f ade Free 1-Line 009 new 5 Engines, napolis, Ind Clutches, Radiators, " \ book explaining tooklets, Circulars t In- M etos Generat Batteries Shafts, pair yst every part Send Problems and $5.00 sear Bearings Springs, etc., et is book free wit! faction Guaranteed Duffy, have never known the house of far- months’ bscriptior Owne srooklyn, N. ¥Y shawsky, you had better write us ar 2 enty magazines $1:00 acquainted Think of buying the Shaler ith’s Service, 1194, We- lens for 85c a pair, and rims for any car at $2.00 each Windshields from $8.00 to $10.00 Spotlights $1.75 Welding out- fits at a low price Specify make and del of car when writing Ask for Ba . ©

salesmen or for selling ng investors, use classified largest classified adver

irs

24 Big Sunday Newspa- 00 Catalog listing 1,000 = Weeklies razines P oe - ‘ Rs. - . ee BI — gain List Warshawsky ver sing, 4 1 UB. State Sr Chicago lll BARGAINS — Radiator t ti rder—send sketct radiators furnished \ 1 \ r- »., 1935 8 lred magazines, three is- Pennell-Company, Covington, 0,000 guaranteéd mail } Ite Write John Smelter, . th, Chicag VULCANIZERS S |} plies, tires, tube t SALES PROMOTION | ter-Anderson Bubbet bo Pree 2 ed. HH Daily Sales develop Dept. P.M.-2 actory Tova nts | BIG Pr h 1 , eileville. 1 A $25 ( i volum Only § ) ionth ) z5 TOMATI« i 1 particular P , urticulars. P ' » A FORDSPEED

I

UNDERSI NATIONALLY “ tiser sup- Irons see plying thousands of 3 nts sires > FORD O fr inufacturers Z00 1 . household specialties 5 rticles requirir possessing unus We want I Kimo Mfg. Co., DISTRIBUTOR entire nia desires Automobile of real merit all Autom ne milli d - - ing Retail St Sers tations o- ane 4 n. Elimit AUTOMOBILE SUPPLIES | Garages and Individuals ) ’ "— aa ¢ . Sent t featured vigor i = ” Ball amet Order asine Write for : Million Prospective iyers f » sub- ~ ae 7 Mfr rid 1800 Pitkir he . i sideration l . — Prices . Service PROFITABLE ibridge Ave Buffal One Day -—~ AUTOMOBILES FORD Matter PATENTS—Write for our Guide yk Corrosive Con | Record of Invention Blank ‘ Sent Postpaid inventior TY ( Hiawatha Sales description of entien © MOTORCYCLES, BICYCLES AND ‘ SUPPLIES part 2 A808

SEND f Mone ro Dp ri ing t Whee 10 Madi terling é . POTENTIAL ided busine Write

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od BICY( 1} rs 1922 HARLEY 115; 1920, $8 $45; 1915, $4 Money refur free Wise tional Ave., Mi DON’T buy until you get our Also runs washer chinery Shaw Mfg burg, Kar OVERST¢ ust sol vidsons Indiar Clevelands Writ Myerow Brother Boston, Mas SEND for big eycles on the easy Cycle € Trent ICKED M 1 ot be P 1 nt prices ma- Gales- torcycles irley Da- ors, AVIATION AVIATORS NEW Perfect c fiying liti 00 Flying tu aviation Ser sterling silver Wallace Aer HEATH pr client method IN4 individua to be done aeronauti { Sled helmets 9 Airplane ( SPEEDY awings $1 or AIRPL eraft Supy Rotary Mot OX5 Mot Compass $3 Flying Boat * a I ANES, phic Motorcycle airplane Airplane ( Chik American a new correspor of Aviation Practical Aeronau School of Aviation gan Ave Chicag OPPORTUNITY Airplane Flyers were free catalog tion. Dept. K, Monadn “TWO-SEATER Spor Leonomical Complete Blueprint F > Engined Monor "rec Aviatior Kans Sct Mechanics ing in engineerir Airplane We ence, POPULAR MECHANICS ADVERTISING air of twenty 1 @ pilot by training This week shop course oldest aircraft ng scho 3 flying foot ie Writs Detroi Mict min- WELDING AND SOLDERING ACETYLENI Br g rches $2 Light we burning torche $7 upon receipt Kansas City Po ge nrer price Mar Mf Mo BOOKS AND PERIODICALS CURIOUS Book nique N 1 Pictures S ) 214 W ENCYCLOPAEDIA Paper, Harvard Classi paedia half publisher's Crilly Bldg Chicag HYPNOTISM easily le guaranteed Postpaid $1.10 Smi irned { Dept Springfield Mass SHORTHAND in Eight pDiete book instructions $2.25 postpaid Ww ler ning Anything in the "% scientifi er eight hours’ st Maitlan id Ontario, Canad ege BOOK 705 E. 1 Stratford of Great h Secrets 35 St nele, ] “MASTER KEY $2.5 gues (All subject P ps Librar Be DIRECTIONS for B Marble Front H stam M DIO, « Toepp Magazine WHAT i RA H\ PNOTISM astound D1014 Be HYPNOTISM only 2 c. Astrolite Co HOW To See Easy Payr Lathe W SECOND Englar HAND B Mai Old ¢ M. Grant, } R ROAD Kiet Map of helt NATI Premiun 19th St tw Sadn ONAI n Review rk WRITERS: Study at home: 30 text bo criticism and advice regarding markets manuscripts Catalogue free Correspor invi James Knapp Reeve (former edit The Edit 50 Alexander Bldg., Franklir or INDUSTRIAL Full directions for Spon & Cha erlain Street. New York, N Send for my Occult, Mystic Martens Alcohol making 19 iZv Wright's drawings $2.5 P. M. Libert Newthought and literature Publisher, Iowa NATURE’S Finer Forces’’; Vibrati Light Colortones; Electromagnet i Radio; Coldlights; Inventi | Opportunities; Fifty Le Cures; Illustrated Satisfactior 270 pages, $2.00 DeLuxe Stevens, 242 Powell, San Francis SECTION RB PICTURES WILD G e Pi _IMPO} ~~ IMPORTED $1.0 Sample I\ « tTED « Park Fred 1" ; Beautiful Xmas dollars doz Art Parkw [PORTED ire nt a AND POSTCARD: GAMES, ENTERTA PLA Ys INMENTS VENTR mak Den Chicag CHAI List Big g Kx t LOQUISM Self- Scientific book Burlington, manr turning "ack ge i t i Ww expand fish elve 8 Pingree, CURIO MYSTERIOUS Nove int water I t Ss, Ef

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POPULAR CKS, BOOKS AND JOKER NOVELTIES re¢ Fenner Ky Magi ents Magi big r ten 10 cents Lowe, kes, magical appara- ipplies, mind-reading, large illustrated pro- Oaks Magical Co., is ffects, Four Catalogs Morgan Park, Ill Table Lifting with instruct ks,”"” (illustrated), Green, Ohio Mystify your friends; New ted Book tells how 33 ist published, includin Catalog of 300 Mystifying prepaid 10¢ Send now! tation A, Dallas, Texas f tron, Wood and Wire r and Illustrated folder 10¢ Works, C, St "aul. Minn s, Books and Supplies. For ll as the great professionals through our instructions Mind Reading, Spiritualism, Large illustrated Profession- Chicago Magic Co., 140 8 Dept. B, Chicago, Ill STAMP COLLECTING terious Packet! Con- the lands of cannibals, rshipers, and wild savages a and Uganda, Persia sold Coast, Federated Travan wonderful all (mostly 8 cents to approval appli- Stamp Co., Dept. 8, Camden, 2 100 different Newroupe ) Red Cross set, Airplane set, Miilimetre Fine heets, 250 scarce yssinia, et price list 12c t approval ap- Co., Box 532 scale for ta Stamp p Collection lifferent Asia u Our pamphlet which ollection properly,’’ packets and sets City Stamp ( cinnatt Ohio Confisca at nearly with lollars ; pa ket 100 ish Guiana ‘ set started a (prewar t perforation g lifferent Fine with (inter- gauge mt cale; val sheets; air : illest ket g sta Dutch Indies, et ate Near republic iy Outfit ilbun ) perforati $ ial ket MECHANICS ADVERTISING ynitair air PARAMOUNT 10c Outfit ( sil republi et; stamp from nfiscated”’ e Sulgaria 2 perforation gauge milli- le, ruler; stamp from most savage earth; set 3 large Crete revolu- scarce Havti, atalogued (1923) price list; from Dutch *ntina erzegovina Chile tems Luxem- lland, Si ! ’ l0e to Cc smallest t ‘ tamps; Broadway, New BOYS! Bet you haven't g single p from the Irish Republic iffer month nly to appr ket of 100 different fr Good San Marino, Fiume (tri le Trav- ancora, Malay (tiger atemala c (Savage) ee., ete. 5 S a fine set ) lif. Ireland. Perforation gauge and mme scale, and 250 peelable hinge all for eight cents! Supply limited, order at once Paul Revere Stamp Co., Watertown, Mass NYASSA Giraffes and packet of 52 dif- ferent arce stamps. Fiume Triangle, large $1.00 U. 8S. Rev., millimetre scale, perfora- tion gauge and ruler for only % To intro- duce our Sudden Service approvals Fennell : Company, Dept. P, Fullerton Bldg., Louis. Mo BRITISH Colonies, 55 Different 90 Kemper, Wollaston, Mass Approval Sheets Many unused Josephson, Bremerton, Wash approval in ¥F 15c. Browne HALF cent Sam BEST one-cent America F P. Hand, 1117 South 60th St., Philadelphia, Pa and 20 dif- dime 1,000 GENUINE Mexican $5 Bill ferent unused stamps for a foreign mission stamps for 35 cents B Nagle. 1101 Marion, Reading, Pa FREE—50 varieties to approval applicants 2¢ Richard P. Lamprecht, Valpa- DIFFERENT foreign r, 813 Richmond tuffalo, N TEN different Siamese stamps 2° 25 Mulberry . w. Cits 1.000 DIFFERENT Stamps South 18th, Philadelphia STAMP Packets given for old books have you? R. Edgerton, Bor 661 Calif 100 high Net ensen Walter y Durso, $1.00 Nagy, What Fresno, ma unused requesting our Christ DIFFERENT Stamps, values, free to collectors Approvals Postage 2 Milwaukee. Wis FREE! Foreign C Ni Different Enclose Dime for Po Russell L 1104 Willow, Le KENYA, Antigua, Montserrat, Syria, Irak Nyassaland, fF sstine and mar ther fine british, French, Portuguese Colonial ir Pennsylvania Packet of 89 different for 2 Request approvals when ordering ceive beautiful scarce et f Free Penna. Stamp ¢ TEN cents ins ong Mar Large Showy Fre f sets; Postage 2 t t tions Payn Stamp Co Los s. Calif FREE— Dandy White Russia land, Dutch proval applic Company Rock BRUNEI l Te postp ”) STAMPS land, 50 Bavs Star fron adelp FREI R re MIUM wi Gleict DIFFERI Ix Cit M AIRPLANES Not F Wi SECTION vals P ’ Co Milwaul WONDER Offer Map 2 Egypt Stamp Foy troit Mi DIFFERI i t Sta NT Swe liffer s NIT ‘ DIFFERI fe vent { Merton , ooOv 15 Stamp s vil Wi DIFPERENT sta Calumet, Chicag BIG Star 81 Richt 35 DIFF. Neurope free my 1 2, and approval O% discount a Ww : Senner St Wissinoming, Philadelphi 61 DIFF including perforated 25 100) =6—Dift Hinges 12 ntain Ci Box 335. Mannington, West 4 MINT sets, including Poland 00 different, premiur Fret Deering Newton st Schmidt ugh, Ma DIFFERENT $5.00 2 Fred Onken, 2,000 500, 50e; 300 Street. Brooklyt 0 DIFFERENT Scandinavian and a free packet of different Canadian tamp Phil Lur Cottage, Mair LARGI eautifu guese an Br »| approval T Houstor FREE ‘Da lows DIFFERENT Abs

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POPULAR MECHANICS ADVERTISING SECTION RADIO OUTFITS AND SUPPLIES . ) WESTERN 0 Write r ! wn. Sell goods " i Toilet arti speaker produc household speciaitie yther } Earl r r I f Big repeat business rigt Cole ¢ I ) t ) er ng needed Write f RADIO Gar 0 t ) t pr ion National Scien- nstr ions, Et tif sab t 208 Monroe, Richmond 91 Carrick ’ SL ILD filed guarding » equiy ; deferred §$ 5 svea " : 4 protectior Ir Hoosier ant t r Is wa New Yort ldwin . pare time or eve Radi guild 3 ts ; “| : for us No trouble to earn $5 an hou ire time at home Auburn Radio Dept 1, Cincinnati, Ohio tADIO WORLD; Nati ekly So all radio stations advan programs Great Q. and Dept All dealers en Copy Le $6 year: $3 six $1.50 three months Special Radio World, 1493 Broadw nal ay scrap your crystal or tube se volume with our amplifiers $8.0 Theodore Burwell, Middletown, N. Y BLIUR Generators, new 6 Pror tion-T . itput 22 amp 2000 r. p. m., with cutout 192 . ’ titable charging A-battery Government Ee ai . surplus, $10.00 Cook County Sales, 2456 - : Calumet Chicago sell Used Edu nas Seas NAVY Battery Dy welry F stage stamps 12 /500V, 24 /1500V Hanfling, 79% way, 501 East Sith, New Y : BUILD a four tube Super-Heter the most powerful four tube set possible P ike Easily made from standard bs bt anywhere Cc plete instruc Mo 10 Guaranteed or your m« MAKE Big led Johnson & Wentink Mfg in your _ Sell ) 1 Sheffield Ave., Chicago, Ill tores, bakeri« t Guaranteed For S a Knockout! Harkness Reflex. Better $3.00. Richard tark, 1216A ¢ } tube receiver. No whistles or squeals towling Greet Complete parts $35.00 post- FOR ‘ Homes, Princeton, Ill chand DEALERS—Write for reliable lio n ning Cort 1836 volt maximun namotors 12 Vv, _ Bargains Kiengle, k NEW Mai rogress’”’ eac ription illustrated catalog nent M verchandise Rossiter-Man- York 0 Wilson Ave., Chicago, Ill GENT Radiotron’’ Tubes $3.40 Post- paid MacClaren. Dept. PM-1. Onset, Mass 0 MILE Crosley Receiver, Tube, Phones 150 Postpaid Catalog 5 Curtis, 1109 th Ave.. Fort Worth, Texas RECHARGING Radio Batteries Mak ! I v nlar ‘ = 1194 Wenatchee ir ight r e Purea G ybart Ohio : Radio Hobart, Troy i LEARN Tartari Mirror RADIO tubes repaired like : $2.00 I ely 120 MONEY-MAKING Plans Free irs pays big profits Particulars free , . > tole gor Mict ew ' big! g all makes New tubes $3.00. Types 2014- mart 4 written gu » with each Tube Manufg r Dept. 10 3 “ity Mail I tral t per lers 1 nptly fille a eee ae 2.650 MILES Dist v ” “ ‘ N “ ance with. one tube Any and ir Simplified Instru Panel Layout and Photo 25« ‘o., Box PM-117, Oakland, TELEGRAPHY TELEGRAPHY t ht nug BUSINESS OPPORTUNITIES MONEY-MAKING Pre 7;

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38 POPULAR MECHANICS ADVERTISING procured; trade mark reg istered comprehensive prompt service for the protection and de- velopment of your ideas Preliminary vice gladly furnished without charge let of information an or disclosir idea free on request Owen Bldg., Washingto Woolworth Bldg BOOKS Explaining Circulars Free Ind I STARTED a mail only a formula and $2.90 fully successful business I Started a Mail Order free J. G. Packard, The Pittsburg, Kan SUCCESSFUL s ing ans ar 450 form- ulas for salable article 5Oct Pentlar Service, Norwalk, nr SLOT Machines— Head mium Machines 101° Philadelphia A $12.00 DARCHI Cal leet ric Alarm Clock free Write iculars Darche Mfg. Co., 643 Chicago, Til. 24 MONEY MAKING ns Free De- Korte, 355 Clay St Pat r N. J SUCEC ‘EED Formulas b cesses Tr ace experienced PATENTS A Formula Man, 1d is for pa Washington, Blvd., With Your Own Produet Experts M ifacturing Pro- Secret Terer Depend able, Profitab Interesting talog B. Thaxly Co. _ Washingt ; GET in the ‘‘Home Made *ky Business.’ Start at Home Build E business Profitable, peri Free bench, ily ny Drawings $1.00 Drawer 923, Butler EARN $60.00 Weekly experience or equipr Greenhalgh, 3009 Ind PUBLISH small sample, plan, free Ind $3,000 TO $6, are making it today for our im Reai Estate.’ Real Estate Susiness $1 Absolute sat i afar f uarant 1. Free cata- logs Realty Bo is pt. 52, Cleveland, Ohio START a Mail Order Business; Particu lars Free A. Ehrke 12, W. Park Sta.. Cleveland, Ohi MANUFACTURE ticles, Free list of B. Barter, 39 PATENTS and ‘‘Recor closing invention and descriptior and instructions information 164 and 165 t Ninth, Washington Cards Banners, ter Patterns Service Easily Painted Samples Free Out- door Ady Lockport, N. Y 100,000,000,000 GERMAN Mark free with 100,000 Polish Mark for 60« 10,000 Austrian Kronen 35c, and 10,000 Hungarian Kronen 50c. Don’t send us any Money, but write for Dealer’s Terms Arrow Sales, 1748 North Park Ave., Chicago PATENTS Write for my free Guide Books ‘‘How to Obtain a Patent’’ and ‘‘In- vention and Industry’’ and Record of In- vention’’ blank before disclosing inventions Seid model or sketch of your invention for instructions Promptness assured No charge for above information Clarence A. O’Brien, Registered Patent Lawyer, 589 Se- curity Bank Building, directly across street from Patent Office, Washington, D. C. See pages 162 and 163 START Business—Make, Sell ishes, Wall Paper Cleaner, 3c stitute, Salves, Liniments, ing Mirrors 150 selected and Digest three months 25c Rapids, Mich ““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, soliciting or agency Address Stephen- son Laboratory, (1) Back Bay, Boston, Mass Auto Pol- Coffee sub- Cements, Silver- formulas, ete Digest, Frand SCHANICS and Repair Shops—Get i fitable business for yourself by t 1“ an Authorized Simplicit Uy ling Station reconditioning n trucks and tract rs A! bec factory representative $600.00 required—in tallment plan to get our Mfg. Co., Port 1 your com pla Simplicity Wash- 1s _MANUFACTURE Millerite } Ingredient for Gasoline Increas Mileage—-saves gas—easily mixed great—valuable Formula Liter.ture Lightning Electrolyte, Kor Rit, J, Amazon Rubber Repair, am other Biggest selling Specialties in al will be sent on request Miller, Chemist, 1115 Grand Central Ave., Tampa, ia DOLLARS! Ethyl-Sup Dollars 1,700 Money Mak- ing Plans free Idberg’s, Rockville, Conn EVE —— knows of the remarkable s ess ( the 10c Stores Now comes the 25 and oe Mail Order Business Write for free circular Taber Bros., 311 Fifth Avenue, New Yor MONEY-MAKING Plans 60. Hundreds of Formulas Wholesale Directory All for $1.00 Particulars free G. Genner, 726 Julia, Jacksonville, Fla. START a Real Business of your own Write for full particulars concerning a liberal proposition Monarch Specialties ( 425 North Leamington, Chicag« HOW to Sell tents’’ “ Patent News-H, Washingtor ; GET Money in Your } Lambert’s Mail Order Secrets’’ contains successful methods never before published Particulars free Leon Lambert, 539-D Kaufman Bldg Wichita, Kans METAL Articles cialize in stamping, Inventions financed, with Manufactured We spe- drilling and assembling patents obtained Ad- description or sample Burritt A-1821 Berteau Ave., Chicago, Ill money with your camera Lan- 136, Los Angeles Advertisement 16+ Popular Display Maga- ) Service (N have a business a and perate New state “Bus iness, brokerage and tne agency in your community Office at home Earn $5,000 year Representatives wanted everywhere Send stam; sed vk let Hayes Realty Association, Cinc Ohi MAKE Money at Home—making toys. We show u how. Send $1 for complete working drawings and instructions. Dekalb Design ing ( Decatur, Ga UNPATENTED Ideas Can Be Sold I tell you how and help you make the sale Free particulars (Copyrighted) Write W T. Greene, 810 Jenifer Building, Washing- ton, D. C 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 free Examination and Instructions Randolph & Co., Dept. 435, Washington, D. C. EXCEPTIONAL Opportunity for Sales Manager capable of handling state distribu tion. Marvelous new Adding Machine Re- tails $15. Work equals $2350 machine. Tre- mendous possibilities Unlimited Profits Write quick for details Lightning Calcu- lator Co., Dept. B, Grand Rapids, Mich MAIL Order Business is your opportunity. Breniser’s Famous Handbooks teach how to start small, grow big Sell merchandise, service, ideas; enormous profits. Spare time to begin. Get complete set, 11 books, $: and be posted. Breniser, 335 Walnut, delphia. Descriptive Catalog and big interesting mail order information, 25c None free I MADE $30 a Breadmaking. 15 Week Home French years’ experience; Free Booklet tells Ashbrook 67, Marengo, O CHEMICAL Expert will furnish Formulas and Trade Secrets All lines Lists Free. W. L. Cummings, Ph. D., 228 Gordon Ave., Syracuse, N. Y MAKE toys and novelties at profits Instructions and 200 25¢ Astrolite Company, WE Start You in Business, furnishing everything; men and women, $30.00 to $100.00 weekly operating our “‘New System Specialty Candy Factories’’ anywhere Opportunity lifetime; booklet free. W. Hillyer Ragsdale Drawer 4, East Orange, N. J DOLLARS Yearly in your Backyard. No _ hroom dope Particulars free. Metz, 3 East 89th, New York. home Big illustrations, Sharpsburg, Pa SECTION BLISH a Monthly Magazine 1 ft er interesting P. M. Lutz Pr jail Slivering 1 ng metaiware j headlights. Outfit tories, 113 “WHAT to Invent for ent News-{ Washington MARBLI mixing inst or cement flooring waterproof low ¢ i ) Particulars, 200 illustrat Chris Mahler, Box 122, Huntingt LEARN the collection busine ( come, quick results Interesting “Skillful Collecting’’ free Natio: tors Assn., Long St., Newark, O PATENTBOOK, 139 mechanical and illustrations, sent free. Labinere row, New York GOLD Window Sign Letters ture them at home Unlin ited business opportunities. “omplete and pattern No experience ticulars, Wilterding, 1144 Oak Park, Il Pleasa WANTED—BUSINESSES FOR IF You Want to Sell Your Cash quickly and privately, we prospective ver directly t pense, no matter where locate ; in selling f-town businesse business is worth $5,000 or more x The Mut Security System, 68 W ingtor 6-PAGE perimente nut St MANI Researc ‘h Chem YOUR ing proce me. W. Ste ist. addre ong HNICAL FORMULAS AND TRADE SECRETS 5A FORMULA Paint—Renewir . Gas T see what supplying the bes Grand Centr T NEW: visors TY Yarrington 10,000 SELECTED chemi and practical recipes ing hundreds of so every business, alphab one large volume of 800 pages postpaid. Popular Mechani 206 E. Ontario St Chicago FIFTEEN Ink Formula F. Brang. Brodheadsville, P COLD (re Never Formula Dollar Bill. Guarante ist, 57 Seratoga, Yonkers, N AGENTS WANTED START a business of your own. 8S under your own private brand. T cles, food products, household Tremendous profits Big repeat We supply everything needed Wr our attractive proposition Nationa tific Laboratories, 251 Monroe, Ki Va GENUINE Gold Leaf Letters any put on Store windows. Guaranteed t tarnish. Large Profits Enormous De Free Samples. Write today Met ter Co.. 438-A North Clark, Chicag DUSTLESS Sponge Cloth. New kl (1) Rub—Dusts, Cleans and I mobiles, Furniture, Pianos Costs (16¢) “Sample Free.’ Sponge, Hartford, Conn

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POPULAR MECHANICS ADVERTISING SECTION MILLERITE Here it i 7 é vad i1EN nstrator about this New Wonderful Eth) per se] ‘ ‘ i \ time trying to Ingredient for Gasoline—I : l 8 r n Lips If there Saves Ga Kno i ily thir ¥ ve Splendid pr Mixed fr m ple rmu profits ‘ ) » ne icle that sells great—$5 ) 5 r f t t 2 Works While y t I t ' I tet Den Mmstt J vaiue we making « ms New di Scientific Triun y need to People Must are the fastest repeat order on sight i eve repeat orders thereaft 1 wn great deal isiness once ¢€ plishe has ust like a p in be The greatest > making f your lifetime > you nothing as we guarantee your ; want ne ambitious ar ir will not let you fail Re- ur as Sales Representative Our sales- iaranteed! Zest products, big- | make big money taking orders for the irest repeat orders No cap- ‘ole Visible Gasoline Gauge Only an made ence is required » furnish ically accurate gasoline gauge that $100.00 y to 1strument board—always in sight—preven weekly i m ale Experienced rt measure—stops running out f , r rv ww price—in class by itself—sells on t expl Pure Food | $10 to $20 a day for six to eight 09 Archer Avenue, Dept A You get your pay in advance Largest packers of Pure Food and = collect Commissior repeat in the world Referen any rders sxelu >» te tor tal not r Bradstreet rating y , necessary i Steme neering way Company in An Co 203 Webb IRNIA Rosebeads selling ce AGENTS—200° w specialty ts coining money; new sells for 50x . $1 ‘ , Thirty Catalog free Mission Factory other wonderful sellers y iventior all Halsted, Chicago, Il! ‘ household necessitie mol utfit free : “e Daily—Year Around Positic Write today General Dept Sey an tee is besides. Groby made $499 TW, Newark, N. J Bldg ee . Cregan $443.0 Whiteside, SELL every merchar t i ee By y $352.00, Bickel $220.91 No Signs 200% Profit f t s er m... A. capital required Exclusive tune for workers. Write oa ssity—millions of prospects Details free Sar hools, factories i Works, 799 Broadway Spare time satisfact P PEARLS j brir yllect also carry accounts until Chri idvertising and approva 1 and big users Our juce result Write The Fyr-Fyter ( Dayton, Ohi $12.85 jai Self-S ning . ake more ‘ree c t ts ir yr trict No money nee behind it Write territor lesired ike ‘ in stores Quick startling easy Spare tir ner profits. No capital or experi ate Write quick for I Ma hee Manufact t pany, AGEN Cincinnati, Ohio le *ROFIT Whirlwit ater Kleanrite thes v ibbir r A 40) nee, R. I AGENTS MARVELOUS Kad g xd for 000 wit! 10 East WONDER I Lark Tube Set d 1ZeT t'o N and Wor nMxiousiy waitir Water Bottle—I inatior Cc g Write for star In-1l Middleb PROFIT

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POPULAR MECHANICS ADVERTISING SECTION WHY S« Prof MP pref ters Free agents Clark Ctr EVERYBODY Need ness i le days Send f Ce Dept FREE Sa tails $1.0 Ne Cloth Clear and Windshield ists bu ] days Es Sideli: seven t capita r take order can deli Pay rni supply v attractive Laboratori AGENTS W to handle fast offices, store ar business Write & Electric Co BIG Pr Specialtic Weekly ea Co., Dent ‘ AGENTS needed R price Trer vertised R Boston, Ma MONEY 8 Mirrors, t Free Spri AGENTS Walt $15-$25 for y Co FREI tyles and Customers Bonus The Lexington, K NEW Sensational! overcoat Fir missions paid The to clear Oriental signals Every Enrigt sight Wonderful for . — . . ily At open cars Simple construction P Ts Men 3 ner eful —— Retails $ 43 Substantial discount te por es —- irs free Write or wire cata e an today tther, Sheboygan is | Ire t Station guaranteed spark ug ‘ AGENTS Sa P - Free auto P wt Il r free Prot eal A rf MBOSSED Window Sigr

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Tv gr., Box PPY-PORTER article Aller selling needlebor F alue I ‘rea Needle New York

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POPULAR SPIRAL ¢ Miniat lead in show it Samy Rialto, Ne W Yor Make $2 Sprayer WONDERFUL Scient “Sapphire ’ Blue White; able Color, $3 per carat thers $2 Rival Diamor ring wanted—will qu Pearl Rope Want Agents Dewitt, Buffalo, N HEATING with in while the make good hts Economy Second St., Web THREADING Machine needles also one Fire, G Any Diatr oil is in it getting is good Agents war Oil Burner ter City, I Needles find sales in every Fine side lines, easily ried, big ind catalogues free. Prentice 23rd St., New York ike 500% profit har window letter trar Catalog free Hint Chicag wa Needle AGENTS 1 monograms, elty sigr N. Wells AGENTS—Three $1.00. Retail $2.00, cash with well, 401 Searle Bldg Roche MAKE $10.00 to $25.00 Standard S00k Easy . Big I nsible le H St neckties } laily s sil Desk Ill Selling Gold Initials ir Owner Buys You Charge 44 Every Sal Your Profit nse No Experience (0) Monogram use, Quick Sell large ital Br AGE ment commi Morri pay All sary outnt stile Penr MECHANICS ADVERTISING salary new for can Novelty give Cutler POLMET—The Wonde that cleans all metals wi r powder Approved by ing’’ and Modern Priscill 25¢ Sample free Gale & ( inboro St., Boston AUTO eality to Mellinger bond 8,000 each lo- handm guara seconds owner tire agent wanted use and take orders for fabric and cord tires; and 12,000 miles (no shipped prepaid on approval; get your tires free; no capital or experience required;. make whe 1 Mellinger Mo Write for Address, City $100 to $300 prices and s Tire Co., De AGENTS—Clever Invention makes every pen a fountain pen seller; big profit, demand increa Exclusive territory offers Sar Marui Company, Tribune Bld a weekly ple kit 200, Kansas Inkspoon Last—World’s Greates st human machine $ trating to Speedy, year guarantee Liberal Write Der trial quick aig t. F, Grar if Free Sar 1e { e and La pecialties Derma { es perfumes fully profitable St. Loui AGENTS—St Key Protectors 1al.es yn ; 3 Check with and address Stamping » ¢t $50 is Philadelp P r Die W INSTANT Weld ires wit! EARN $10 daily refinishing met ea headlights ; Laboratories, SE t Fr De D Advertising Mils B Wri Ora can A w $20 who wea Sh V Ext rier 1 Ad per an an you IV New product with ritory to live rer r ¢ i Manufacturer ter Gr E t. B37 EV iy, Duo C ys Gold Initials American IF you tance tising, P loesn’t (want) zines AGENTS WONDERFUL x-Cel Lun Luminous) lark CTION AGENTS sell W lerful repeater 1 Auto to hustlers Ww Grand Rapids ERYBODY uses extr ye Strength Extract tle Big Dept. El ATENTED Cigar Lig Front steners Wonderful Se on Big Steady Pr Plan Free Drake Mfe waukee, Wis IG Money and ul ehold ne Fast Sa for his ) Ten ord particulars and Monogram Co., | J 0; make te for nge want good live ag get the busine ask it. I'll gladly render t Geo. F. Baker, Mer ypular Me Ag GENTS—Send for free ashday wonder You ca to $100 weekly, accordir le time. You don’t h buy at sight, leave sa looking for you long before lake the rounds again. Sa Premiums for your cust territory. Credit given. F Co 1549 N. Wells, Dept ave BUILD permanent business en's Children’s rer. A. P. Cor . 110 Start You Without a D Perf Toilet ¢ ssary Carnati jaranteed lon, Sale Summer 3 VE ract we UU St. Loui mmes secure agent r and reaching investors ads in largest news Price list No r ertising Agency igo, Ill. The in the Men art salesmer agency manent inou Neck Sell on fir ju. Write f ll, send f edi Wri East Or HIGH GRADE SALESMEN AGENTS SALI SMEN S} ~

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POPULAR time 1 commi work Write t The Marvel Com- power pe tie men ca other will nen f open for No will be brand ousehold repeat bus 1 Write National oe, Richmond, Va sperity That about with the Alexander organizatior Some 5 year Attra receptive earning n and b Alexar c 1 Want Vaporizer gu to 8 miles per gs and better), quicker smooth running 10 3 more driving « ission, $: E and proofs Chamberlain Scientific 009 a less garages retailer makes particulars isive distrib- cigar lighter ediately for pla Masterlite w York 1 think fr tail store hed neerr week lian Ohi Mgr Dept ll Four overcoats Sq h ale ifacturers req territories to se nitary Twisted in arger commission se in the Country ition Wire Mercer St., shoes for iidren below store prices We deliver, collect 4048 Harrison, Dept ranteed District Managers t repeating bul public institution all kinds Product years among thou isers including U ; ediate big earning $100,000.00 company t men Write at once iny, 871 W. 70th, Cleveland, and ISHED national concern manu- eh grade household specialty nanagers to men who car salesforce; exceptional Kraft Company, West week, no invest Sealer, retails $ Kendall Sealer H

MECHANICS ADVERTISING SALESMEN themselve or she write us ness not a get Product nati ‘ territory to high-grade 10th Richmond SALESMAN: Wonder sells "0 employ sale Robinson Co wi permane today rich ly ire St ty, cents sales l Write Boston DISTRIBUTORS— Sc Handiest Tool market Treme earning n, Boston, DISTRICT Managers seals 3500 hou repeats o., Dept. QG, EXCLUSIVE State Distributor Newly invented $4.90 Tremend Millen Mfg., ig.. Boston, Mass WANTED—tTailoring to $125 per week towns have started with large made-t« the country, furnishir ipments, including ke your own on each order tion, perfect sale Write start instantly Super, 1 sene prof Wis SALESMEN Shirt New York EXCLUSIVE Stat yearly Newly inver tai $4.90 Tremenck peats Millen Mfg., Bldg., Boston, Mass DISTRIBUTORS, $ w inventi l $4 only solidated Co., Boston, Mass SALESMEN Wante or full time t brushes k design f art or all r commi Ind WONDERFUL or girl can m make from $8.( Grip Clothe I € aving ¢ used for ma itself N ity Se days quickly housewife there are ster Write for particulars pair and a mounted ticular to agents telvid Til sere thous men Tremendk 100 us demand! Biggest measure pr ted ake quickly » knots There is bi interest¢ ntly prof This is men. CFSCO nd ful new office rew ndou s! Write ¢ Mass Wonderf r! Retails us profits Boylston Big ear pricing system, re- Big re- Dept. RG, Colonial Salesmen, make $f merchants in ma our line. We are the tailoring hor g elaborate 500 all-wool fits from Guarantee best workr Distrit pricir : demand Dept Y lier! Any big wage wm te 20.00 ine Faste levice for he ny other purposes in time it fastens home a uses (Crimp of t if ners 1 oF and re- pr pe Griy save ar send 5 for one with full par- Grip Company, WERE You Ever Offered a Grocery Store Our flour, entire sets, proposition is bet canned goods, d line of groceri paints, roofing tires with no rent to take large orders guaranteed and experience r workers Dept. 226, C bank or Express DOES Your Trade tT for free catalog published Co., Dept. L, BEST Seller and tubes; of over 800%; in two or tube; cessory big cr 212 N minutes, sells dealer money Philadelphia, THE Jackson Mfg Denver, Colo., has high as $85.00 daily patented auto specialty ample and particular guaran to Get and aut pay; from proven not necessary "inest Big commissions every particulars and free sample Pa., ean handle coffee and well as radio mobile oils and ney invested, Goods are Selling profitabl Hitcheock- Reference ter You ried es as m m<¢ samples quality Steady Address hicag Ill company Tse Salesh« and Send ever Sales ards? largest Lincoln Sheldon, Chicag Jem Rubber Repair for tires supersedes vulcanization at saving put it on cold, vulcanizes itself last life of tire owner ar] ac- how to make Amazon Rubber Dept. 510 Ce 1331 salesmen clearing selling their newly Write them for free teed t aut léth St SECTION , 414 Br SALESMEN aut reg , ' Book C Dept $60-$200 A WI ters or tore w Free sample Libe agent Metalli Clark, Chicag MAKE $100 what the publi a receiving sets weekly pays profit No big ir . © Sharpe of Colorac in Representatives te nee is sweeping the i i t your county j}ton Blvd PM EK ndov Weekly canva one Thi day Chi SMEN i r anteed steady deposited Ir : tion Dept Newa TRAVELING 58: stores wanted | sell unique line « Year round, fast If not Works CALIFORNIA RB cakes Agent new Fact HELP WANTED

HOME Em t \ fa work, experi« Craft I i mediatel r fully desig r P ir tructi € Cc OAH stl HOTELS Nee wide ce 1 for uy every sary Write ra Connon Svetem ’’ M tory M48, Winor M U s GOVERNM Over 2 0 positior work. Mer year Railw Clerk t unneces our coact positions ately Fr ester, N MONEY Radiator ods Free Ss MONT he NT yearly $1140 t lerks—City Car work Infi ation sufficient ‘ unnecessary l Write imme Dept. 8-3, R irrors, Aut igt »s Outfit Met! Marion. It Postal ( c ediately. } lin Instit Rochester FIREMEN sag | Sleepir car, trair rt lore 228 Railway € Write imr 19

g eom . $2 Expe Bure

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POPULAR MECHANICS ADVERTISING SECTION WOMOTIV t | tN rr lating 00 HAMMERMILL B ? ® ret t ‘" handeliers, | $14.00; 10,000 $24.00 2 $ K r 4 furnis! E ), 000 —$108,00 100,000—¢ > . ) I i I r Broadw New 201b En pes ) ti R \ yn, | William W. Webb. Sa D M I N Y | Ll " a - r Wi rint Stati rT | PERSO ~ \ W k “~ G osc Se Ah Circular 4 = “4 ‘t é' Wast $ ra g or stationary. Write Mr B a, O1 ( ( i St. I M immediately FREE ¢ l ‘ Mi KR I wanted ir id 1 $l ' 4 P ig money ler 20 ard : Frat Ss Bureau ards a cia Sa t 7. 5 = er Printing ¢ T7022 O AGI s 5 la M - ) Intr 00 THOUSAND le uty * Saahhad Bond Letterheads $ sever W r li ” In- Free ( mercial Pr capital or experi req N Clark 8 ps . tak We deliver a Moore ate igo ca i i yu f Ss NEARGRAVURI s Pa You Dai M . fere la Moderate We furnisi . . BUSINESS SERVICE Knox, Ind Ma hee I ( a - > Tt; ee eee oe" 6 225 BOND lettert Cincinnati, Obi DEI AW ARE I rporator ( A Fees heads. cards. $1.23 eacl , Sma Chas. G. Guyer, 901 Orange = > : . MEN ( ' : Exper e “ ington. Del Econ ic Pre Leonia, N unn Ss z ¢ 70 Haver 200 PRINTED 8% \ ie ia TYPEWRITERS AND SUPPLIES Letter-heads, Envelopes, B W 3 wernme SIMPLEX Typewriters $5.00: Famous, | "¢88 Cards $1.00. Postpai I5-$192 h ions fr | $5.00: Reming m, $12.00. Circulars stame. | Hudson, N. ¥ a a gg: vor Institute Demeo, 114 Ford St., Providence, R. I 250 LETTERHEADS ep . tO e er "7 i : TYPEWRITERS All Mai é e- ited and mailed, $5.00. 8 BECOME a iscal Be . " half. Thoroughly rebuilt in our factory. by Sur Mot N t + par mre k “s “y a the famous “‘Young Process.” Fully Printing R r money aking i master ry antee ‘ree Tri Ve handle t . tar — mail Earn while you learn Write for : st ] : ~ we peer ce : AR. ande Ht t ‘ » Schoc 56- oe Soe Seen. as I ireula —_ , \n ue Landscape School, E, for Catalog Young Typewriter ¢ Fantu svewark ‘ 4 ‘ icago I MEN g yns firemen, brakemen, TYPEWRITERS | colored trair s eepit g car p sters, write mes aa ga _ R od Adve g for pplication blank; ‘experience unneces- Kar —— . a save ent " st ¢ 0% oO st e — - | no p tl S wanael Ral a. Institute Dept rYPEWRITERS \ M r 10-12 "Sodtemeie Tad outs . gains; guaranteed ) T ri : - : ( Ada. Okla | GOVERNMENT Railway Postal Clerk . | 250 BOND Letterhea l $192 nthly Many other pening . UND! RWOOD r'yp a 3.90 | $3 90 Sample Midland I $1400 upward. Full information free. Write “4% — ba a a | Hickory Kankakee, III ‘ ] . , > PY 7e 4 r } ree int — ly — ago Civil Service College, estat R =~ BOND Letterhe $2 0 % - B ¥ —_ ii = — 7 like a ne Write ize $1.50 Pla Hardi ti ‘tam tame. tp Meet for big ft in- Ward MULTIGRAPHING. _ Pr n Ridg.. Wichita, Ka ng Mfg. Co go, I 1s quote. Printing. W Hi NDREDS j Be . Espen Auto rYPEW $ up wick, Pa —_ na a ey eng Guarantee price list mobile Repsirmen. 250 week. Sample ies nd Free I Man- PRINTING OUTFITS AND sons free Franklin In ite, Dep S 400, facturers 192 N Rochester y Deashern ‘ COMPLETI a! ee ee ee te TYPEWRITERS, all stand type, ink, paper +, Carri ady positi Particul os up. Fully guaranteed. Fre : Write Mol Dept A-12, De r, ( . sated ‘et PRINTING Outi Pr CLERKS; for Government Postal and Ty ar 121 N pe © Iti Send ote i’ positions $1400-$2300 yearly Ct | Model P York, P Experience unnecessary Full particulars | PRE-USED Pri free by writing G. W. Robbins, Civil Serv- TYPEWRITING Ri >? rt Surchell Bldg hington lies i lee : xp 411 Burchell Bldg., Washingtor WANT SCRIPT = aaa ; - Richland. P : typewri t M Author Ser Bra | er DUPLICATORS AND PRINTING, ENGRAVING AND | MODERN D MULTIGRAPHING } bor, and M G Typewritter P 1.000 CIRCULARS. Good Paper, 6 x 9, | Lessons, Music, M $1.00: 9 x 12, $7.00 J r I ister feations. if > of Ohio Pr Tw r FOOTE P s for Or »>D Fr I t ite Fr Sa I te B t Fr J Printing T0686 Haltr ( Or Rid i HAMMERMILL B ad STENCIL D 1 0 | 100 enve es yr ) >a . Handwr | Free Op; r P Z D tur Pr ~ | | N. 3 | Pri r | 500 LETTERHEADS I $5.00. | COMPI rh M G. One v s A Wi | . H j l ) LETTERHEADS I $3.00. | Mo | Sent Prepaid. 8 FE M , Yo M isvi Pa t r EMROSSED B Ss S | i Q D | ple Sta D Pi rial off I H | Pp s Se. ¢ 7 ae © i ADDING MACHI?! ar : PICTURES ‘ P I \ ri ? ~ “ 5 : OUR i wi ‘ er 1 : for ha Slann Sign 8 B ENVELOPE sp . Ave. E.. D M — Tih , S I P BoH \ , _ AKI I ¥ ig R =I . PERSONAL G FREE 1 v ails gi . I i @ tEE I course Producers’ I gu 230 Wainwr | . : , 4 Su M St. I | . Oo t W INVENTORS d g t ecur patents S H i ¢ P I P Id write for our How to Get Your | FINE 8 > ‘ ketch for | x I t ‘ r. $ 1 fr " ” wit t charge R h & ¢ D 118 ( = s 0 : = - ( MMED I ~ MAILING LISTS RAILWAY 1} ‘ ) ¢ ” nw” t M 8 . ‘ I 2 . A RA {ERS, § i fr W i ! I rt I D S-.19 v K eZ A 4 - P

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POPULAR MECHANICS ADVERTISING SECTION SMOKERS FOR

or White Owls } Productos or Ad : id in U. S. A Richard Lavery, As ( € ter 00 nt 19, Ma } ry to Smoker 8} f; write for particulars Montrose Cigar Factory rose Ave Chicag I ; FOR MEN 7 T) s 1 Genuine Calabash B s, 5909 Wake- 4) Fort) See our adver y2 f this issue rhe ny, 2137 Main Street, > Came or Chester $ 600 divided int i, $3.95 Holland ton 19, Mas - Suggestion! Men's I fs Warranted Pur Eact Six $2.75 tage s Irish Manufacture A Box 38 Colorad pring ATS AND LAUNCHES € l made Cor Weest Uce t g e prot t I i engine booklet free t Hi RK er 2 B t \ 6 | engine Pla " Fr € Z of The Rud 9 Murra ( t g how to mal other | f 1 Profuse I’ i M sendin re i r Mechani B AZORS AND BLADES R r Shary M t tive I f proof It «st ra i ’ Ye , 4 - o $ $ Write f Ca CES. Shar g Ma e 1 K Cit M G tt t € lol S 1, O Ss rd Saf R p B f Gillette ¢ \M W ner, Fa N : ketbook € f ‘ Get r FOR THE HOME 4 HER Clock Wort en ( e; Instructions fre chine. r fri | ( t for ; 9 . ‘ r ar ( k ( adelphia . 29.91 1 ul Big mone Rug arpets, et fr erial Weaver are be Send for free I 1 Book it home weaving and quote 1 @asy tert on our wor Union Loom Works, 48

nville, N Handbook, for the Ar ished a book des rete in the home, shor th full direction for d urself with ordinary It is Price took

written so you ¢ 50 cents, postpaid 206 Ff Dept., tools. 138

HOME Mechanic Attentior We spe VIOLINS—I ize ir unusué cabine hardware and mellow-toned I chanical devices for me furniture cor quality Get detai structior copper hest tit ing transfer 14th St San Pedr Calif lesigt knock down t wagon wheels BARGAIN rT He Mandolin. ooter wheels, wood l . lamp shades $50 buys it Ra Kerst, Wapakoneta, bridge lamp arms i trical fixture Ohio e and reed, porcelai table t upl : io suneiies. male a SACRIFICE Large Stock new i tt hair and typewriter desk fix ster strumer 4 Saxopt — at ss we banjos, steel rails for wood bed lock hinges veemms, ¢ wea Write for low catches, dowels ri imer ! king prices, menti tr ent Winn School stand trimming et Most ete line of Music, 2 P trooklyn, N. ¥ entire country thi cla er Send I WANT Song Poe Casper Nathan, ten cents stamps for Tenth A il Catalog 1252 Bryn Mawr, Chicag Hard-to-Get”’ material I t M WRITE Song ; » “ ngs Big money and reputa ual Training Supply ¢ \ M tior Write for informatior J. Gorden HOME Mechani .-s ’ Me Pub. ( 1 N. Hoyne Ave Chicas ~ ory ee ge - a MUSIC Composed” t rds. Bauer B vat wil r¢ value ‘ feces s : : a home 96 page 20 i rmeri f Sousa B Osh Ww cents Popular Mechani Pre P r VIOLINS Deey M ¥ Ss f 2 Mechani tuilding, Room 807, Ct I credit Easy terr for wor rful instr FOR ore heat from le fuel ‘ vor} Get details today Gust I Henning, 2 ‘ tending the furnace: even teady heat ta Gaylord St., Denver, ¢ time attach the Crown Ft Save CORNETISTS—tTr i x bs] furnace This inexpensive ice 1 | Clarinetist Get Free P ter N 6 teed t make a coa aving of ‘ t 2 | instrument Virt is ‘ ra ™M or your money refunded Write for booklet C.F.8.CO., 15 N. 10th St Richmor Ind PATENT ATTORNEYS DIAMONDS, WATCHES AND JEWELRY PATENT Pr red. Pr > sona refu i eff t Hi t CALIFORNIA Abalone Blister Pe en Sadana wt Pir ring yollar Eact W Prod model for tual searcl ‘ ’ Company, 525 West Santa Barbara, I P. Kir Master of 1 I ‘ Angele Loan and Trust Bld Wast ANTIQUES, WAR AND INDIAN RELICS Rg Ee SASNETT - , . cipa aminer Ss. | 6 FOR Dens; Relics, collected fr } McGill B tir W I Battlefields lustrated Catalogue ar PATENTS for Ir War Photos 25c. Lieut. Welsh, 2 R ones. thinhest an i Brooklyr N best ref 4 y WANTED—Furniture, ¢ , Fe ‘ Wr \ Kk N York. mps, anything old W Longne 8 AT , ” E. Genesee St.. Buffa N. ¥ PATENT prosecuted INDIAN Made Basket B be j 4. M. I 0 W Cur ( Gill h . , 108 PATI I free ‘ ventor I N wv n, D. ¢ SEND 5c for fine, ne tt J INVENTORS t ntique firearr F. E. I \ ' 0 Grove M — t PHONOGRAPHS AND RECORDS con. 2 i ; ’ i? ‘ PERFECTION Phonograph-R INVENTORS bination tonear ! I ‘ ‘ 4 price I I | < } I S ( I I . BUILD ir t ‘ t f ‘ I wit ~ ~ “A é at wi é r \\ i) ( AX P g & Pr ‘ | NTS J AA East 113th St., New Y N. ¥ 4 BUILD Y P s , | t } Motors, 7 r ‘ | I € Latest | I | vice f , le nad Cal ( | f for H Mf & S ‘ ! iB. O BR B Ind 0 I \ D. ¢ t EDITH Port é ;3 I at Cost. Cir } CASI Sheafer Mfg. ¢ s n E, | ‘ \ ‘ . oO ‘ I v BUILD Your Own P ( - . ely Save f The ‘ r VIILLIONS for Hi cratic Phonograph i ‘ I i - I record Finest W for free é ! r erials cut to f ready t t t i 4 seprint and full f " t é ve I at al r Satisf g rae I I e | Ww Write for catalog cl | D. 6 & R ( 94 hs f I PATI S I Mar ( r I I Wri for SAVE mone Finest P I a Builde Equipment I ( k f M logue Superior Ph ‘ I p Ha B M in BUILD r Phonogt \ Albert E. Die Patent Law . e\ thing Write for Pt gr ! i itor, ¢ B Oura Bldg W R Parts Catalog. Amer P , D. ( 7 Be ( MONROE MILLER, Ouray 1 MW t ID. I ent Attorne M MUSIC AND MUSICAL INSTRUMENTS Electr Expert Free B B PIANO Jazz; teaches Ear Playing, N« - Jarmor Chime P Effect Blue PATENTS, Trade-Mart Desig 1 Cabaret, Vamping, He tagt e ar ! fir t é ex ence and g t Jazz ( inati Particulars for P pert persona rvice reas ra Card Write Piar B Ss r ‘ We proper pr r nver Wr Toront ( for free informa i ex t oO f wr - ing patent efore proceeding J BANI and Orchestra Instrumer Ex r & « 4 F St N. W W clusively We se ind excl ge Bue é g _ «. Saxoy ne and=6 other I el V \ 1 NVENTORS Se for f Ban Ludwig Dru and supplic Penze - re ye p ef and al ( arinets ' ir and =u t We . he ’ re ir work or 1 band and orchestr j I fee he . nfor tion tre I truments. Write today fot ete | a eee ra Catalog and list of used and rebui ; me inc ling free ipti to M = bas D. Booster Magazine DD h the Profe H. F LOWENSTEIN, Registe ! House (r f R n < l Att ‘ Techr expert. Mcl ‘ l ( 1 Ave K ( | \\ » «

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46 PATENTS, pat l t trad iTK copyright H i H t i RK H. Frave Pate At for f { 5. P ‘ I i ( R Mel I Was! DD. ¢ PATENTS I M i Pr , “ or I i S D. Swi & ) I AV . ESTABLISHED S64 M I s & ( I Re 1A N 8 P I eM ( I i for r Vl ! fe or Barrister B \ g I ' I ling ( M ! I k, ¢ THE PATENTOMEI I 1 t t 1 Manuf ret Ma i or ' t \ & 3 P ind Trade Mark La I 118 F St \ dD. « PATENT SENSI rt k the irventor f Ss I e } PATENTS—Wr f Guide yk K rd of Ir i Blatr ref lis inventior Send mod h of 1 m for Exaini ion and I io No I for I \ ys 2 & 34 \" D> | PAT ‘TS W f Guide B H to O na P. nt i “‘In- venti 1 Ind and Record of In- ' r li ing inventions s r si f r i ion for sured No r Clarence A Lawyer 589 lirect AcTOSS Washington, Be Sold I u make the sale ed) Write W. © 806 Jenifer Building, Washing- ton. D. ¢ INVENTORS Send sk r model for ree r 4 patentable nature and xa f patent Book How to Obtain a Paten ent free Tells what r should know Established tw eight year Highest references é Reasonable charge Chan- x 4 i i174 Seventh, Washington, D ¢ TRADEMARKS $ Design patents $35; Copyrights $5; B l Free ) ar ex per t r tered Pater Attor- r R N lit { ig PATENTS—Send for B let ( tair f for ji r Our i f Pater ofr r rds $ i pt ‘ r ex & Ta t S$ McGill I DD \ ORS—W for rG Book ( Y I f I I k Ss i ' } , f , \ inat R & Dept D> ( INVENTOR’'S Advisor t alua r i] é anica i nt free i t MM. 1 Patent Attorney Parkrow y \ s refer f B ed Send ry ex ar Patent L 1 D. ¢ PATENTS ( right Pror I > Over year active for ter Book free » ~~ « Bldg 18 F hi ( HERBERT JENNER, patent attor ar mechanical expert f Washing ton, D. C I report if pte ytair and exact t Send for cir ir INVENTORS’ Guide’’ sent free n re quest; this book ntains illustrations of gives valuable sll who have or nt Frank Leder and Engineer Ss gs and I r i ‘ Send rf k I Ad FOR INVENTORS \TENTS if t f M & Plea r ket i \ ‘ i Our i xte j f t oO H i-] Pate i 1 I r ; i r i | Mart I P = \ I or N D f yatent M xX ¢ s t tf Pa W B New York 4 Seiler \ B W i { I Bid Chi i. Hobart Bid 82 Mart s Sar I ( f 2 Van Nu B zy, I Angele ‘ if WANTED—I t Exper i rk “ 1 1 Mact , er mill under ‘ f. Send Miller Andersor tubtl Wor \ Ind Dept. P. M.-2 CASH i nding ‘ ‘ . \ P ¢ ( ra 1, Barr r Butiding, Washing ton. D. ¢ UNPATENTED Ideas { B Sold I t 1 a vy and he Free rticulars (Copyright Write W r. Greene, 807 Jenifer Building, Wa g ton, D. C HAVE You an invent r for sale on ish or rt alty basi Do h t buy a practical mone ti Write us definitely what r war We bring seller and b rt , Ad lress Western Security (¢ Hanniba Mo. PATENTS wanted. Must R 52 Vanderbi \ N York ¢ INVENTORS fore a gf P end r ir free r Ad ( fidential Service for I: lesigned t save yo y and ir yr tie for é ( G I 0 Sixteenth Stree Sout Washing D.C PATENTS red rag istered 4 rel ed yt er e f and= «de velop nt of r Pr r ad ie gladly f ishe Boo et f for if ‘ Z lea free on r lest R B. O Ow Bid Washi r 7 2276-R W rth Bldg s ¥ MONROE MILLER, O B \ ington, D. ¢ Patent A M } Exnert B . nada rea fre Blue Book INVENTORS’ Ed | ‘ ) » H r re 1 sé Mi M grea t I Ey ty » te " iP S > 2 P Free N rt | D 0 B li W D WHY i f = . i f | Pp , : ? et " ~ > : Wor Sou B > o INVENTORS--\ ; 1 “Re lof I ; r i tion for and \ rJ.t & Washi Db. ¢ LA‘ YpP s ~ PATENTS WV ( B H to Obta P I il i I Send vd of ’ tin: ry N ree for a fo A O' Brie Re i Pa » Se rit Bank B 4 Pa t oO W D $ es 162 l WILL finance te I D. ¢ u ro ul Ba 1 handling, i i \ rs. B g 5 ’ I > Or POPULAR MECHANICS ADVERTISING SECTION ce Talt z, Was SPECIALIZED ry for fur id 7 D for r oO De cD, Oo p WI D hape for ¢ ‘ . R ( Gt S ( ell. ¢ RESPONSIBLE manrifact r facture r hold utilitie r i L, j bfte ( land, Ohi PATENTS Send luable ir at ' harg for irct ’ P " : } Pror pt rvi singt HAVE You an Invent r our free book, “‘How to G tells r ter and method r r = ex R & PATENTS FOR SALt * FOR 8 { S. A. and A 2-i Sha 1 irt i r R B \ I M8 Da s D PATENT 449 Nove ( \ t € de Ss factur Rea ( or 1H D’’ Flig B \ PATENT t | \ Washington, D. ( S ‘ ~ XN 729 a AK Garte f It hold (rar i i T \ Ca r > R N Y PA NT M 1 i ig P Manila, P ‘ PAT NT \N ' Al 0 ~— * XN > 1 \ M ‘ NEWLY Outrig ' H \ \ EV R-HO V | fas eo ot | mm % INV IONS I ~ ] . . ees i I \W . VAI 1B | f) = o tif I OR ra i Oo 4 -—et

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P, Wast POPULAR Working Ma- Tools yportunit manu milli« Motor models size de rt of 01,607 entifically 1 Adjustable. Dr Col about facing ele Way ‘anada proved 1 ] Creeping absolutely ney for West for Mil Gem rtabie lin Arkansa nti to Wood r vet wag Apple haven't milion are spe inven other in Geo Advertising, l INSTRUMENTS urvey- direct from money Broadway, St ri INSTRUMENTS AND DRAFTING SUPPLIES German Pre Money back ompany, DELS AND MODEL SUPPLIES atent Office, Washingt Guide and ‘‘Ir of In inventions invention for No Clarence A Lawyer ARO across D. « and die work Hardware Thorndale 1 ma Napoleor MECHANICS ADVERTISING PATTERNS and = made; light odeis Hathorn manufacturing. H. W Mason City, Iowa PATTERN Making Wood Models. Four teer ear Experience My Personal At tentior M Herbert Heighton, Hypoluxo, Fla Box 4 WE Build Models, desigr develop and manuf ire articles ir large or small quantities Homeyer Mfg. Co., 1385 E 7th St Cleveland, Ohi MODE Dies, Metal Stampings, Light fanufacturing Modern Shop Reasonable Prices Osborne Register Company 123 West Pearl, Cincinnati DIES, Tools and General Models and Manufacturing of new inve tions specialty Logan Machine ¢ 126 8S. Clinton St., Chicag« ll MODEL steam engine %” x % 8.50 Finished parts for $7.: Other er gine boilers, blowlamps Catalog r 10 stamy Model Machine Shop ¢ i East 71 St New York Cit HULIT & CO., Model Makers and Experi- mental Machinists, Tools and Die 2 West Jackson, Chicag Ill We specialize in high-grade model work on inventior of merit New parts and repairing Your patronage solicited WE make working mode for inventors and do experimental work and carry a com- plete stock of brass gears and model sur plies Send for catalogue. The Pierce Model Work Park, Ill THE Modelmaker For those Tinley interested in making working model Send 10 Address P. M. 120 Liberty Street, New York MANUFACTURING PATENTED Articles, Models, trass Work Machine Constructior Dies Made Kansas City, M Wire Facts Send us your Baur Metal Specialties ir ries r standard Wire pr lucts F itting., poi we g, et facilities ma e present production possible We our tations will be of interest to you Me Craft Manufacturing Compar Box 259-W Chicag Wi lesigr nd build eci make 1 le lies r t £ er hine work and light f ing M Mf ( Kansas Cit Mo WIRE goo made t rder. ( ey Mf ( ) Western Ave Chi LIGHT Manuf ring; Let know r wants. Shang r Br Machine Shoy f WwW h St Peru Ind PATTERNS, wood and metal, mode experimental work stamping and mact e work, light manufacturing complete Reli able Pattern Works & Mfg. ¢ Cincinnati Ohi BOLTS, nuts, rivet et 0. L. Dicke 48 Trask, Bayonne, N. J WE design and build special machine tool dies, jigs, and fixtures Experimental work Reliable Machine ¢ 100 W. 23rd St.. New York City EXPERIMENTS developed, dies, mode and manufacturing machine designing } tin s and information promptly’ giver Address Schroer Bros. Machine Works, 23( Holmes St., Kansas City, M METAL-CRAFT - Eventually Metal Craft Competent Engineer Designers and Producing Organizatior await your com mands on dies, stampings, die-casting, deep pressing, screw-machine and wire products Plating Enameling Burnishing As sembling Wrapping and Packing to your specifications Large completely equipped plant which guarantees prompt, efficient service It is not the quality of raw rials alone, nor the precision in manufac- ture, and not just the service rendered that has given Metal-Craft the good reputation mate- they bear—but all of these, as a constant certainty, in Combination Estimates promptly furnished Metal-Craft Manufa turing Company, Box 259-W, Chicag WE develop model make dies and stampings; prices reasonable Rapid Mar "a ufacturing Company, Pittsburgh IRON, Brass, Aluminum Casting Mod els, Patterns, Light Manufacturing Welch Brothers ¢ North Ch Ill SCREWS, nut machine 1 t il et \ crew Work West Br New York Cit SECTION 47 LONG established manufacturer of saute accessorie whi re ad it prac- tically all wholesale ar retai essory houses will nsider manufacturing and dis tributing new automobile product capable of equally wide sale throug! me char nels *atented article preferre \ddress Auto Accessory Manufa rer R 2104, 310 8S. Michigan Ave Chi OUR factory will make your mode manu facture your articles as we ild your tools, dies and fixtures Star i Die & Specialty Co 817 W W Blvd Chicago, Ill PATTERNS, wood and mé Models tools and dies. Brass, bronze t and iron castings Screw machine wor produc tion work of all kinds Write M Ma chine & Pattern Co., Terre Haute, Ind FOR MANUFACTURERS MANUFACTURERS w Er I Sale send us your pr S Acme ( 41, St. Paul St London, N MACHINERY, TOOLS AND SUPPLIES STAR 11" xs 3 Screw ng the Chuck d g t holder f ¢ Kampen r 13” SWING, 5’ bed, Engine Lathe 7 YOU can install athe i now under r } Pa ent I Se ige 2 for details South Be I e Work South Bend, Ind COMBINATION | self-fee jrill and H Breast ! ( $ 00 | & Novelti ( Front St MW et, R. I x LeBlond he x f K $ Heald ir ( t crank si ¢ achinery ( i } c 218 E. P s ( CONCRETI suilding Block M and Mold Catalogue free ‘ re Machine Co., 303 South Third St., St M ENGINES, MOTORS AND PRACTICAL Steam 1} eH. P DYNAMOS $18.00 ‘, ) Eexce t as Present Ja s Char ¢ B r Ala GOVERNORS ¢ r \ I es wher use n statior é ( ars Candee-Smitt G er - Spring e, N. ¥ STEAM, g ga ee kK watt alter ge rat Te pulle ng hine st f r | working mining and |} b ery Builder of freight I hand elevators; ghtly ed elt ma ! a bargai Rafiner | Works, K as Ci M SMALL G line, Ste Dyna mos M . Storage Batte new and t | New ( 4 e free Dy namic M f ring ¢ Fi tional tank | cl ‘ BLACKSMITHS BLACKSMITHS Liste M more money doing har bs easy with 7T Mod ern Methods of Master Machine B mit ing, Forging and Solid Welding, ‘I Dress ing and Tempering to a standard w lored tempering char All for One D r. Sam ples Free W. M. Toy, Sidne 0 BENDING MACHINES THE f i H feld W I ver Sender is the ast v ¢ g machine ber met t most any conce able ! I bolt and Aut bile &S g I 8 up t 1” bars or 1% I € 1 the | est corpor r e th t c eT a4 farn I ne t one Send for cir r H f 1 ‘ Box 1 Wi ! { r FOR THE SHOP MECHANICS You will eld f ever get stuck on a job if you keep « for quick reference a 14-volume et @, ilar Me ni Shop Note At the e of 50 ‘ me r ‘ € f the ae abor i kink ive t er \ f he be purchased separ the ‘ I Por r Mechar Book Dept., « E Ontar St cl

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48 POPULAR WELDING | N ! 1} W f \ M k if not Pp r Me Book D oO r 8 Chi HOP N I k for ) t 4 have a S i f P i " B post Popular Meet B Dep 20) if Or » St Chi FOR SALE—MISCELLANEOUS BARREL I ight lamaged kK ery te ur kingw g war ~ i lire fact r to con Wri for parti ‘ E. Swa & { P 1, Main 2 LUCKY Strike Ca ( r Cigarettes $1.35 led int ye brand $3.9 H and rd Ave Bo 1M $1 BUYS a 2,000 M Ger G Bond Wanted German B la i Frank H. Everett & Co Wa St N York ELECTRIC Cooking St Oil Burner Used I Motor Parts Bargains Howard Christi Somerville Mass KARSTAEDT’S Mammoth Pecar Pound $1.50 ‘en pounds $12.50 W. Karstaed D 0 ALL Wo n for fr fa turer $2 per lb a H A. Bar Har ny ADD Multigr less th RESSOGRAPHS Letter Envelope Sealer Dupli } i I If price Pruitt Co., ar Guaranteed 170 W Chicag BU Y—Exchange—Sell! Many f ir reader have for ale or exchange the article 1 are looking for—and lot of them are looking for the very items you want to turn into cash. Get together Let our t I ion readers know your ishe they'll hel y Send r ad la t Ge Li Baker, Manage ified Adver tising, Popular Mechani Chicag WANTED—MISCELLANEOUS po Y Write We are re i n ar f Stories, Photop 1 Ar suitable for publication mar t for free criticism lucers and Publi Clearing H a P. @O Box 2. Montreal, Quebe MAIL D rded Gold, Jewelry, Dia Watche Silver, Platinum, Postage 8S Ar \ Quick Cash Ret H R ible Ten Days, If tf tor Miller & ¢ 88 24th S ) Mict WANT ) Pr t et Any ki li F MR W MAIL Di led Dia Wa Ss P P Mer I Te I f I used Postage g Valuat Quick ( I I Da If 31 H Bidg i, O MAIL r discarded J I ( ] Crow Bridge Wat D Silver, I nd old False T h, M prompt Goods r rned ffer r fused Stat Sr ing W Old R D 7 ( AUTO Carag " 4 Bu Centra i etre h $ 00: cit ater, g ele ant zg fr ploys 2 : l ar g art sal | ) g Free St Farm 150P } a St ‘ ~ 390 ACRI Mi Dalia ~ Ss I ( ar P » | Na tional | I g. Chicag ~ WANT fro wner ha for i \ John J ‘ ppe Fa wi ATT! TION Get acquair i for your Fart Hote r R Store, n where 1! ated ynfid service H Busine Ag ( e@ati, Ohio MECHANICS ADVERTISING FOR 8S I full ir \l i t in Bi ‘4 ( N h Da 4 Eact ectior ible for bal for I ‘ 1 ha al I i i if whict e j lt Tt ' f tl i tt 4 | W " “ l i . Add W P M ) East Ontari = ( PECAN-ORANGE 0 ( ) G ra | s luce $500.00 ear Suburban Or 1 Dept. M, Biloxi, Mississippi SELL ir pr juickly for 1, f utter where | i Don’t pay big Pa irs fr Real I > en ( Desk B, Li In. Nebr $5.00 DOWN, $5.00 monthly; 10 a improved poultr fruit tock wood 1; $100; Ozark Fishing I ing rapping Alfred Zi rinar 1800 N Fifth. K Cit I ROOTS AND HERBS HERB Doctor Book ) t 250 r k her i H i ( i Box 1, Vander Park, B K N. ¥ DOGS AND PETS RAISE guinea x Pa r th ltr r rabbits ytor i a i 1 We l antee Par 1 booklet how to r fre ( Di buting ¢ 102 Grand A Ka ( M ALL kind } ting d 4 R T Booneville, Mi SILVERBLACK Fox $ 0) Ti P t Muskrat Arthur Scl acher I and. Ohi BEAUTIFUL registered | " Bulldog 50 R i. D Texa BULLDOG puppies for X P t Monte Kenne Hunting Ind PERSONAL LEAKY R M i ' ior ‘ . , r | | t Fi in t ind e yr per \ ce ir i r ! ] f M if i I ( 238 East S N York ( \RE ¥ o if ~ idver ) ' ; Ty } » Tr ( 2137 M Ss Ohio FREI D S H th ¢ D ~ ( 1 La) fe} Wo Y ar t al _ I a tr i ther 1 " Luck S r ( ) H \ \ , M ROUBLED t B ( D> D 4 ( I KNOW rt i K Yr Send ‘ P H f . at ( Box 2 DD, I rOBACCO li t and ain be er é wit t i H ( le f Gold Pre I r i r € € Par 1 fr Qhio ¢ ical V I ) We ] ALI N i ¢ rici Z 7 Box 2. B Ma roBacco r 8S > $ ) if cured R i ( _—. = Md NUSUAI H Six 2,50 x nsistir cter f z S H Ast \ € gi gd i i » l 1 M r ' Dox 2 i SECTION TOBACCO Kill anly Vigor il Cigarettes hewing * =. r red ron charge tisf r Stops cravi . r = r n trial I g Hastings, Neb &, FREE—Informati 4 that has brought happines ) alth t th atior E € tamp f la | Dept 246-0, ¢ ra Spr , . [7 | MISCELLANEOUS J TH New 8S at ( | ‘ ; il I t 0 parisor W Is greate Wa lendar 25 cents. ¢ Louis Unger, 1412 East 29th § a! Ohi wie MONEY Si z Mirror ' Radiators, tableware, stoves. O is Free. Sprint Plater, 28 CALIFORNIA > Ww . One Dollar Ww PR 2 West Sant Barbara, I | KIDDIE Ka bea terns childres furniture Kiddie Kabinet 5 West York 7% PRINTING | Pre ay. Mal ea t P ' Others Interesting Ci ar 0 William St New ¥ \ * LOCKSMITHING a rac new liti $1.50 ney back if | Routecs 106 Andover St.. O ' SIMPLIFIED Z slf-tone ‘ Pa ar % Fisher, Prir I NEW Mail Order P eady incor re time nt iti yr : ‘ $2 ‘ ir = f Ww H B Box I CATCH fr 1 I ‘tf eeks ti Ca ' f thi e } r B . ay cee . | Ss ( ‘ WORKING Diaw I i nd 7 B I oy ~ ad Test-B a — \TTOO ar I Ta id f ,3 . - > ‘ E/ * 2 St., Br i . FORMS, t ‘ i . an fa Tra \ i = ita e r > Brook N. ¥ 2 ~ ROCKS i 3 : S , ARTIFICIAL $ va haere ea) > B Z ( ‘ ] . ° MD at ‘ 1 i q i - HOMEOPATHI I | rid M —~ “ itr ( N. Wa : i ] l « OUTDOOR & H y | 3 4 , = oO ‘ R f. ~t 0 \ h va \ ) Raft “ I B rT si \ lo S | I iso \ | P | ~

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saan (Adie 9 . MD, oe oe _ —«_, we ~ 1 ~~ POPULAR MECHANICS ADVERTISING SECTION ty Bring the romantic, enchanting, entrancing and f — melodious strains of the great instrument of the | @ ——— tstands into your soul and you will soon ¥ - become popular and successful. [his TS. : , 4 short cut method of home instruction iy - ball enables you toquickly master the Hawai- / ree ‘ ian Guitar, so that you will play as well : J € as the Native Hawaiians. if ee ‘. Our staff of Hawaiian instructors a Hawaiian . ‘om P have perfected a method of teaching that is > simple that without any musical enews. } - P edge, youcan quickly learn to play real music Guitar when ; ¢ from notes. It isas simple as learning your - am you enroll *s and it will not be long before you will play latest Broadway hits such as, “Mamma Loves Papa, Papa Loves Mamma, Linger A While, | Love You, Wonderful One, " Arcady, When Lights Are Low," and any others of your choice long before you have completed our course, The ly f impl ti to learn and the j ; Are You Popular? 9 ohio cue Waar tr nae sete Chops ace ba bas ’ is . whether it be popular, dance or : . classical. Almost from your first lesson you will be able to play Do You Fit In This Picture? love songs like Aloha Oc a ¢ on 2 * To help you get started and to promote in America the popularity of this wom Greryone Hines pepwtartiy. x —— derful instrument, we furnish absotutely free when jou enrol! as a student, to be ng gt we ay | a beautiful, full tone, genuine, $18.00 Hawaiian Guitar. Only 1,000 free instru- “eo ed ga aw thom ot ments will be given away, so if you want to get in on this free offer, write ey ~ on will quick’ for particulars at once—you must act quickly. become the center of at- traction. irs an cows t's Easy to Understand Pictures { ——, our short cutmethod of OF Qur Professors’ Playing Arthur Brisbane, the hichest paid journalist in the world once said that “A single picture is worth a thousand words.” He was right, for it stands to reason when you take your instrument in hand along with actual photographs of our professors in ac- tion as your guide, it is easy to imitate and do the right thing Along with our easy to read course we aiso supply You with diagrams aed charts, as well as many pictures of our professors’ playing. This en- ables you to imitate the pictures. isn’t this easy? = Phonograph Records of Piece You Are earning Inctuded Free As an additional guide, we also furnish you with phonograph records of our Hawaiian instructors’ own play- ing of the piece youare learning. Thispractically brings our professors from our studio to your own home and enables you tolisten to their playing just as if they were actually in front of you First Lesson Free So positive arewethat you will become one of our students anda booster for our course. that if you write at once, we will send you absolutely free, without any obligation on your part. our first lesson which will enable you to see just what you can capect when youenro!l, You will also receive our big book ae gt giv we fall : - ¢ . a SALE YourWayto ‘% Popularity and @Success staken the country by storm Hawaiian Guitar jazz artists are popular and successful. Genuine $18.00 Hawaiian Guitar Free su enrollasastudent,you secur® absolutely free a beautiful, full tone, cenuine Hawaiian Guitar. Wealso furnish every bit pment so that it is not necessary for you to {an extra penny outside of the cost of our course NEW INVENTION Kno-All Fingerboard Chart Quickly Teaches You How to Play and Read Notes ewest invention of ourchief Hawaiian instructor. h is exclusively used by us and which we call the “Kno-All Fingerboard Chart” quickly teaches you to play and read notes. So simple is this device st anyone can understand it and begin te play im- mediately. Diploma Given to Graduates you eraduate, you get a beautifully engraved ‘ > vats Sar rticulars about our « s be one of t.e lucky ones tuhove a free Hawalian Guitar reserved foryou—write at once, because the number of gift Hawaiian Guitars are limited. diptoma and after graduation, we also give you six tation. ; RUSH THIS COUPON FOR FREE BOOK months’ free service and consul . . Fi TF No Forming Class to Wait For ARO VNSr Peee sae WL sdb 8 No forming clase te wait for, Start your lessons at Hawaiian Studio No. 5212 e and join the band wagon of success a popu- Received my Guitar all 0 .K. and + New j larity. Do it through the Hawaiian Guitar. yy 4-4 foe ,t Ay ve : Music, first \e-200 and I think [ will be able to venue. or k. RushCoupon for FreeBook & First Free Lesson [isl wy,n-lerSievile Ler don East | Please rush your book, “How to Learn Hawai- Sign and mail coupon to us today. You will receive leawoed Ave., Knoxville, tena ian Gui and my first free lesson. Aiso our Free Book, ‘How to Learn Hawaiian Guitar” Gotting Along Fine reserve a gift Hawaiian Guitar for me. ind your first lesson free. ig Sgt st is, 0.K. and arm ¢ This obligates me in no way whatever ee e - jong nicely in woiee, of the that Hawaiian Studio No. — re = 1SSWGrece @., Poscdene Cal. | Name ”* of New Yor cademy o usic Proud of Nawsiian Csiter 4 . 4 y a er fectiy r- with your + ied 212 Fifth Ave. Tt be very ple indeed and Address _ " above all, =e proud a of my poate ia 5 a r ® New York oped for the Gheetareeea trans. . ’ Line 1, Cuisog, Nations! Banetor |r City Stat . D as —_ neasee NOTE—This offer expires in GO days

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Chief Engineer Duniap, Electrical Division, POPULAR MECHANICS ADVERTISING SECTION 40001312000 a Year' ENGINEER DUNLAP GO INTO ELECTRICITY! Make $75 to $200 a week bossing Electrical jobs. The world’s biggest, fastest growing, most fascinating business NEEDS YOU. I have made it easy for you to become a successful ELECTRICAL EXPERT, right in your own home, in spare time! And I guarantee to place you in an Electrical job, at 50% Raise in pay or to refund your money! Learnat Home by JOB-METHOD! With the help of 22 of the world’s foremost Electrical Engineers, I have made this training the most complete, the most up-to-date, the most valuable on earth! We train you on actual Electrical JOBS, so you get the theory at the same time as you get the practice. My instruction is easy to understand, rapid. Any man under 40 years, with only common schooling, can win success and promotion with Dunlap-training. You get 4 BIG ELECTRICAL OUTFITS! Dunlap “Job-Method”’ instruction is built around 4 complete Electrical Outfits which I send you without extra charge as a part of this eourse. Includes motor, telephone receiver, switches, magnets, compass, wire, tools, instruments and materials Remember I train you in every branch of Electricity, and prepare you to BOSS Electrical jobs at big pay. $63 Scholarship FREE! Mail coupon immediately and save $63 cash. Get all the facts about your opportunities in Electricity. Get my illustrated catalog and my GUARANTEE of a job and a raise. Let me show you how I will help you succeed in the great Electrical business. Write today! | GUARANTEE YOU A JOB and a 50% RAISE! I make this agreement in writing with every student: Ifyouare now making less than $40 a week, i will guarantee to get youan Electrical job after you finish my training, at a salary of 50% more than you are earning today, orl will refund every cent you have paid for tui- tion. Only the AMER- ICAN SCHOOL makes this guarantee Mineis the onty home study 50% PAY-RAISE COUPON AMERICAN SCHOOL, Dept. E-974 Drexel Avenue and 58th, Chicago Please send me your Electrical book, the $63 Free Scholarship offer, and your guarantee to get me a job and a 50°, raise in pay Name CHIEF ENGINEER DUNLAP Electrical pe weal eee American School i = i trical training which justifies it. Dept. E-974, Drexel Av. & S8th CHICAGO pe MAIL TO-DAY Famous Electrical Engineers helped me prepare this Training! No one man on earth knows all about EVERY subject in Electricity. So! gineers of the following great tions help me to give you theworld complete electrical home-study t General Electric Co. Commonwesith Edison Co. Crocker-Wheeler io eo futter-Saeemer —_ merica /. Ce Gestletnass Seeteie & Mig. Co Western Electric Co Underwriters Laboratories, Inc and Electrical Engineers of lowing universities Cotumbia se eng Dartmouth Colleg Massachusetts Tastitute of Technology Lehigh Uni a University of Vermont Armour institute of Technology University of Kansas and many others Startto make money quick! In your eleventh lesson, withir weeks after you START taking ing, I will give you special instruct ELECTRICAL and RADIO JOBS, you can go right out and make money in your spare time to pa his course and have plenty left over. %* don't let lack of ready cash yot back—I will show you how Dunlap-training pay for itself My graduates are more successful! (Read this letter) Dear ™ i sNeeeyNe as an duc ational institution NOT TO MAKE A PROFIT, gives thet ing at the lowest possible cost, The sources of this 27 year old, million dolls tion stand back of my antisfied we will refus ntee that ify ery penny of your’

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POPULAR MECHANICS ADVERTISING SECTION 2100 Tale “AW " 1) @ Single Dr awings me ing! m3 NSS ~ | See How Easy It Is lo Learn Drawing This New Way Through a remarkable new method anyone can now quickly learn to draw—right at home in spare time. No special talent needed! Become an Artist this new easy way. nology es OU have always longed for it— this fasci- rapidity. Starting with straight lines and curves iting ability todraw. Nowit caneasily you quickly learn action, perspective and all the be yours. Illustrating, Rapid Sketching, more advanced secrets of drawing. Almost rative Designing, Advertising Art, Cartoon- before you realize it you are making drawings that uu can easily learn all of this right in your _ sell. TY > oY 7 > : ‘LP ac me. Hundreds of our students never h ad Send for FREE BOOK ving pencil in their hands before starting, ; a high salaried artists today. You may be considering the study of art mere ly for the joy you can get from it; or you may Big Money in Commercial Art want to turn your ability into the big money , , om ma which is to be found in Comme re ial Art. Inany iined Artists earn $50, $75, $100 and even vst feel ti ae. t @ eter c0 . case—if you feel that you $200 a week! Single drawings often bring ss - $100. And alli sTeaaal few hours Want to learn to draw, - And now, with just a few hours ona for our new Free nt study each week, you can quickly learn ke drawi hat | | cal Book on art, which tells ike aw xs ¢ . . ~ . rcis e drawings that have a real commercial 4) ahout the wonderful opportunities for happi- ness and profit in art, and describes this star- tling new method which indreds of trained artists are needed today er the country. Magazines, Department \dvertising Agencies, Publishers, Man- rers—these are just a few of the fieldswhick joakes it so easy for urgent need of artists. Get into this at- you to learn to draw. e, big money field now. Mail coupon for this Free Book and§ Washin Ss . . « gton School of Ar Fun Learning Art This New Way for our Spe ial § Room 3012-B, 1115-15th St. N. W., ‘Washington, 0 Cc. Nease send me your Free Book on art tells about vour new method l all just like a pleasant game when you Free Offer. ay gtr Meacial Pree Oiler. Wisess to draw with this new method. , You study Washington at home, yet every bit of your work receives dividual attention and criticism of a real School of Art It’s almost as though you had a famous Room 3012-B standing at your elbow while you work. 1115-15th St.N.W. this training you progress with amazing Washington, D. C. Name (Mrs., Miss or Mr.) Address ity . Age if under 16 years

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POPULAR MECHANICS ADVERTISING SECTION $100 a Week “Wouldn’t you like to earn that much, too?” ‘I know you w could, Bob—think what it would mean to us! It worries me to eee you wasting the best years of your life when you could make them count for s0 much. “Can’t you see it, Bob? Don’t you see that the reason men get ahead is because they train themselves to do some one thing just a little better than others? “If the International Correspondence Schools can raise the salaries of other men, they can raise yours. If they can help other men to win advancement and more money, they can help you, too. I am sure of it. “Don’t let another year slip by and leave you right where you are to-day. Let’s at least find out how the I. C. S. can help you. pon right now!” Let’s mark and mail this cou- INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5661-D, Scranton, Penna. Without cost or obligation, please tell me how I can qualify for the position or in the subject before which I have marked an &: BUSINESS TRAINING COURSES Business Management Industrial Management Personnel Organization Traffic Management Business Law Banking and Banking Law Accountancy (including C.P.A.) Nicholson Cost Accounting Bookkeeping Private Secretary Spanish (] French [}Salesmanship [ |Advertising [ }Better Letters LJ) Show Card Lettering Stenography and Typing Business English C)Civil Service Railway Mail Clerk Common School Subjects High School Subjects Illustrating CD Cartoening TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering Electric Lighting Mechanical Engineer Mechanical Draftsman Machine Shop Practice Railroad Positions Gas Engine Operating Civil Engineer Surveying and Mapping Metallurgy Steam Engineering Radio D Architect Architeets’ Blue Prints Contractor and Buildor Architectural Draftsman Concrete Builder Structural Engineer Chemistry () Pharmacy Automobile Work Airplane Engines Navigation Agriculture and Poultry Mathematics Btreet Address City Occupation Persona residing in Canada should send this coupon to the Interna- Sonal Correspondence Schools Canadian, Limited, Montreal, Caneda, Larn Big Income Raising Poultry Poultry raising is one of the fastest growing businesses in the world Always @ ready market for products. Work is easy fascinating, healthy, profitable! Commerciai poultry raisers earn $3,000 to $15,000 a Year Learn at home. Our course of instruction easy— rese by Harry M. Lamon, the man who t nele Bam how, and corps of famous pou! Behool endorsed by State Colleges and universities. —— No Matter Where You Live we can teach you and show you how to start in business with little outlay. Not necessary to be on afarm. Many grad- uates now making big money — and are their own boss. YOU can do the same! Our FREE BOOK og for Profit’ this SURE way to dence and pleasure. YOUR copy today! National Poultry Institute Dept. 151 B, Washington, D. C | I Made $100,000 in less than five years as a real estate specialist. Started during my spare time, with no experience, and less than $5.00 capital. If you want to learn the secret of my success and follow money-mak‘ng method, send your name and address at once to American Business Builders, Dept. A-4412, 1133 Broadway, New York They send full information free, telling you how you can build up an independent profitable business of Write for your own by using my amazing successful systeni. Big feld—un- limited possibilities— increasing demand for with creative i velope ability and originality. Work in- Ores ‘$25 10 You can doit if ambitious. 0 hly covers ur course thoro of work . juates command big salaries. catalog, samples, guarantee and Free Outfit Offer. Detroit School of Lettering, P.M AUCTIONEER Free Book tells how. We fit you by Home Study or at School, largest in world. Auctior eers make big money—work short hours. Th sands of graduates. Write today for Free Book. Enclose $1 and we will also send our ‘‘Auctioneer's jouar,"’ a Dook of 393 jokes—best yet. Address A DAY W. B. CARPENTER, President MISSOURI AUCTION SCHOOL ae: Walnut Street, Kansas City, Mo. No Better Christmas Present for $2.50 than a year’s subscription to Popular Mechanics Magazine Containing 3600 Pictures and 3600 Articles Much of it Interests Everybody Most of it Interests Anybody All of it Interests Somebody Order through your Newsdealer or address the Publisher POPULAR MECHANICS COMPANY‘ 200 East Ontario Street, CHICAGO, ILL.

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POPULAR MECHANICS ADVERTISING SECTION 7 fastest Always 8 easy, mercial z= | = 1 [he Auto Business vy 000 To110,000 A Years Mak Do you want to get into the auto business in a way that will bring you to independence quickly? Or are you already an auto mechanie and look- ing for a way to get into a bigger job? My big “‘ Master Course” (thirty weeks or more of thorough training) will ? n.G- ZELLER put you where you can tell the world you are a real auto- 4] pRESIOENT mobile man, and prove it. wih sai Training for business comes down to this—the more you know the secre qui ker you succeed. A doctor or law yer goes to college for years, but |, send he gets a foundation for a whole life work. The same in business. With a real foundation ISIDESS 7 ich as this long course of mine will give you, you are fitted fora high-grade, well-paid position; York ) be a service manager or to run a garage or salesroom of yourown. The investment of time Ww you | money will pay you big dividends, and bigger every year. nae Seven fo Eight Months’ Training (Cockse) At Detroit Make up your mind you are going to get this training right. Then go after the big job or start your own business. You will be your own boss because you can get a job anywhere. The fourteen years of experience of this great School (at Detroit, the Auto Center of the World) have been put into this Master Course. No auto training course even approaches it in mpleteness. You need have no experience, to learn auto work thoroughly in this course. We start you at the beginning and give you both head and hand training. Auto dealers send their men to take this course, to fit them for big positions. Foreign governments send officials here to take it, to prepare them for handling their auto industries. Complete equipment is here for you to learn on. ee \ll types of engines, electrical systems, new cars. — Instructors are expert, each a specialist in his line. - In addition to this 30 week course, we have a “ues number of shorter courses. Write for outline. ting . The 15,000,000 Cars—A World-Wide, ik. . feet’ Wonderful Business SS a2, ddress Think what opportunities are open in the servicing of over Wolverine Garage, Holland, Mizh. fteen million cars in the U.S. A. alone. Men who know the DOS. business can get a job anywhere in the world. , —y Ay two "ine State” 5 ay ae Mo, 2 lave the agency for urant, Star anc int cars anc a | Do What These Men Did * employ two more “ Michigan State’’ men. They say: oe J. R. Navarre, Carrollton, Ohio (Service Mgr. of Dodge Station), “We don’t remember when we fell down on a job.’ writes: “Tiree years ago when I left your school I was nearly Michigan State graduates make good in a big way broke, and a single man. Now I have a fine job, wonderful wife because Michigan State training is geed training nt nd comfortable home. Mechanics think I must have had twenty e ears’ experience. M.S. A. 8S. gave me all I needed.” K. Switzer, Harrisonburg, Va. (owner of a big garage and wency), writes: “I wish you could have relieved me of the jot. of making the income tax return on our year in business!" John Grahek, Chisholm, Minn.: “‘ Before | went to your school [ hardly made enough for my family to live on. Now I average $400.00 a month.”’ : Mail Coupon To Da ; 1€ Benn Koehler, Pulaski, Wis.: “‘ Made net profit of $5,000.00 my — = it aret commer ie business." > ; Michigan State Automobile School Cernoir, Bi Bradley (owner of garage and battery service at Cleve- ticles nd), writes: “‘My business earning me $500.00 a montl clear, growing all the time.” , _ - ; i Send for the details of our great aster Course Write Me Today (and our other Courses). Use the coupon, or te. I will answer you personally Every student here gets versonal attention ¥* sa Life Member. Write me today. isher G. ZELLER, President \NY MICHIGAN STATE AUTOMOBILE SCHOOL 1512 Auto Bidg., 3729 Woodward Ave., DETROIT, MICH. Send me FREE and without obligation complete in formation about Detroit-trs al int ing to n ke "the most money and your 30 weeks’ Master Course Name

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POPULAR MECHANICS ADVERTISING SECTION i The World Famous Ludwi Trap Drum Outfit! Thousands of young men with no previous training or knowledge of music are learning to play trap drums and are making from $75 to $200 a week. You can do the same if you make up your mind to ‘start at once and secure one of these fine outfits with free instruc- tion. Naturally, your selection will be a Ludwig—the choice of 95% of the drummers now playing with the popular bands and dance orchestras. Ask any professional. B Phy in Hour! Free Instruction Trap drums are the easiest of all instruments to play. than an hour after you get hold of the sticks, you will able to play ordinary beats. With a little practice, you will be ‘‘jazzing”’ away in approved fashion, Masic is not essential—you don’t have to know one note from another That’s why any beginner can play trap drums in a short time. _——— Joseph Frank, F nn trap rummer with Isham Jones, Brunsweck Or- chestra, uses and recommends Ludwig Drums Think of the fun you can have in addition to the money you can make. No dance orchestra, band or bugle corps is complete without drums. Many enjoyable evenings can be spent at home drumming with a pho- nograph, radio or other instruments. Bea trap drum- mer and you will be popular everywhere. Send No Money! Take the first step today and send the coupon for full information and description of the many Ludwig m Outfits as well as Free Trial Offer. There is one "' fit every purse. A complete set costs less than the average popular instrument. Ludwig & Ludwig 1611 N. Lincoln $d, 1359 + Til. Ludwig & Ludwig, 1611 N. Lincoln St. Dept. 1359, Chicago, Ill. Gentlemen: Please se _ — full information on your Drum Outfits and Free Trial ¢ Here’s the Gold Mine of Ideas Everyone Has Hoped For The pesky furnace fills the house with dust. How can this be avoided? Is there a way to prevent yourself and the house from being littered with soot when you take down the stove? How can you equip your home 7 mo without muct expense? How can you make your own equipment for the kitchen? Where can you go to get ideas for electric devices about the house? These questions and dozens more just as practical are now answered in the Popular Mechanics NEW Home Mechanics Handbook No. 1. Just off the press and crammed with ideas of all sorts for everyone who has a How to Make What You Need About Your Home The book explains how to make such devices as: Clothes hangers Ironing board Door stop Portable shelves Coal bucket Flag pole Indoor tent Foot scraper Ash tray Power mp Sewing machine Wheel barrow ae mee Refrigerator Pipe bender — Power grinder nvi Medicine cabinet Chain door lock Window box Awning Flour bin Weather strip Writing table Wheel chair Ash box Stove truck Gas burner Fireplace screen Shoe rack Window pole Water heater 329 Discoveries — 203 IMlustrations Every item is a discovery made by someone who ¢ countered an emergency just like you are likely to e counter. The devices are all home-made, and none ar patented. Anyone can use them in Send for a copy today. Use the at- tached coupon. Cents Cents Send me Home Mechanics, the Gold Mine of Ideas, at « | DO cideaddaddnieidsenpesdnciapbiesssns | street i Mail to P Room 505, Popular en SS ular Mechanics any way he sees fit. This book is one of the biggest bargains in years, not so much because of its low price as because of its unusual contents. Press, echanics Building, Chicago, “et

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POPULAR MECHANICS ADVERTISING SECTION = gS Se ae re eee pe B an ' ~~ . a pt: 4 Master Traffic Management $50 to*200 a Week There is no field of business today which offers better opportunities for promotion and increased salary than the profession of Traffic Management. Instead of growing smaller and more limited as time goes on, this held of business endeavor is becoming larger and larger every day. It is only now that thousands of business organizations, manufacturing enterprises, mills, mines, factories, railroads, chambers of commerce and municipalities are fully awakening to the absolute necessity of ying the trained traffic expert. he salaries paid to expert traffic men are large —?200 a week is by no means the limit—there are trafhe directors and interstate commerce experts who are earning $10,000 to $15,000 a year and up. As in all other branches of business, the success- ful traffic expert has gained his knowledge of transportation problems by having acquired specialized training which fits him to take his place imong the highly paid business executives. this specialized knowledge and training may now be acquired by any ambitious man in his spare time without interference with his everyday business duties. Any man who earnestly desires advancement can find at least one hour of spare time each day to devote to preparing himself for a bigger job, It is for the benefit of such men that the LaSalle home-training course in Foreign and Domestic Traffic Management is offered. LaSalle training will prepare you successfully to handle important traffic work, You will be directly under the supervision of C, O, Frisbie, former Traffic Manager for Armour & Company, former President of the Illinois Tunnel Company, assisted by an able staff of 150 traffic experts. You will be thoroly trained in pecight Rates, Classifications, Regulations and Management, Tariffs, Bills of Lading,- Routing, Claims, Organization, Laws of Carriers, Interstate Commerce Rulings, k. R. Accounting, Statistics, etc. You will receive the personal attention of these experts who will answer your questions, direct your training, give you suggestions. The cost is reasonable; deferred payments can be arranged if desired. Mark and mail the coupon now, and we will send you all the facts regarding the attractive opportunities in this field. LaSalle Extension University Dept. 1264-TR Chicago, Ill. Please send me catalog and full informa- tion regarding the course and service I have marked with an X below. Also a copy of your book, “Ten Years’ Promotion in One,” all without obligation to me. oO Traffic Management— Foreign and Domestic: Training for position as Railroad or Industrial Traffic Manager, etc. Bo Other LaSalle Training Courses LaSalle is the largest business training institution in the world. It offers training for every important business need. If more interested in any of these courses check here: O Business Management O Banking and Finance O Salesmanship O Modern Foremanship O Higher Accountancy and Production Methods 5 —— O Personnel and Employ wen, eed ment Management 0 Law—Degree of LL. B. O Expert Bookkeeping O Commercial Law : O Industrial Management a Business F nglish | } Commercial Spanish Efficiency 0 O Modern Business Corre O Efiective Speaking OC. P. A. Coaching spondence and Practice Name.... Present Position ..................... Address

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56 POPULAR MECHANICS Free Trial! In your own home— Think of it! Our free trial offer makes it possible for you to be- come a crack Xylorimba player right in your own home Ea. siest instrument to play. In addition, we furnish you free, 14 complete lessons. Learn to play in a few hours. With a little practice you can play jazz accompani- ments. Be the life of the party—anywhere. Earn $80.00 to $200.00 a week with a = Xylorimba With this instrument you can play either for profit orforfun. Deagan instruments furnish the “spice” of the music. Used exclusively in recording studios for phonograph records. Free Lessons—Easy Payments Our free lessons and easy payment plan make it easy to learn at home, with the phonograph, radio, or other instrument Send coupon below for illustrated litera- ture and details of our special free trial offer. If you have a radio, tune in on “WGN,” Chicago, between 8 p.m. and 9 p.m., Nov. 20, and hear the famous Deagan Xylorimba seneeenaeee®’ Mail Coupon Today! "°""""""""'" J. C. DEAGAN, Inc., Dept. 1359 Berteau and Ravenswood Avenues, Chicago, Ill. Gentlemen: Without obligation please send me full informa- tion regarding your Free Trial Deagan Xylorimba offer. Name Address Seeeeeeeeeenee A Great Book Free — - o = = 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 will ever have to do 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 gives you the best methods for every kind of machine shop work. It explains machine tools and their operation, drawing and design, tool work, gears and grinding, jigs and fixtures, automatic screw machines and their tools and all of the mathematics you will ever have to use. It is plainly written, completely tllustrated—the very best kind of help to the machine shop man who wants to advance himself. No money down— only 7c a day It comes [FREE EXAMINATION COUPON McGRAW-HILL BOOK CO., Inc., 370 Seventh Ave., New York Send me for 10 days’ free examination the New Library of Machine Shop Practice. If satisfactory I will send you $1.50 in 10 dsys and $2.00 monthly until the special price of $19.50 is paid. If not wanted, I will return the books at your expense On receipt of my first payment of $1.50 it is understood that Tam t« py of the second edition of Fren« a o h’s Engineering receive Drawing City and State Pontion Bmployer ADVERTISING SECTION Make Things From Metal [It is surprising what success an amateur can have in the mak- ing of useful and dec- orative metal objects. You can make such articles as: book ends, desk sets, blotting pad corners, paper knives, stationery racks, rock- ing blotter, desk cal- endars, table lamps, bracket lamps, dining room dome lamps, whisk broom holders, candle sconce, drawer pulls, and dozens of other articles if you have the simple directions in The Home Metal Worker’s Library This library consists of three cloth-bound books as follow 1. Metal Work and Etching 2. Lamps and Shades in Metal and Art Glass 3. Electroplating Each book is profusely illustrated. The books are writte: especially for amateurs, although the designs they conta: are equally useful to professional metal workers. Simply write a postal asking for the Home Meta Send No Money Worker's Library to be sent C.0.D. When th« tman delivers the books to you, simply hand him $1.50 and ‘ lew cents postage. Or, send $1.50 and the books will be sent postpa POPULAR MECHANICS PRESS Popular Mechanics Bldg. Room 711 Chicago, Il! Handy Mechanic’s Library Includes four practical books, suitable either for mechanic or amateur, as follows: Lathe Hand book No. 1; Shop Notes, 1923; Auto Repairman’s Hand book No. 1, and Shop Notes for 1922. The four for $2 Send No Money. Simply write a postal asking that The Handy Mechanic’s Library be sent. Hand the postman $2 plus few cents postage when he delivers the books to y POPULAR MECHANICS PRESS, Popular Mechanics Bldg., Rm. 711, Chicago, Il! Make Furniture at Home —either for your own pleasure or t sell. It is easy when you have the i structions supplied in Popular Mecha: Home Furniture Making Library. ‘|! library consists of the followin; cloth-bound, illustrated books: 1. Wood Working for Amateur Craftsmen 2. Mission Furniture — Part 1 3. Mission Furniture — Part 2 4. Mission Furniture — Part 3 5. Arts-Crafts Lamps These books contain full direct'ons and drawings for the making of : sorts of furniture, including table and wall lam; for electric lights. One purchaser writes that | has made over $1,000 worth of furniture | sale from these. books. You can do the sar SEND NO MONEY — Simply write a postal asking that Popu- lar Mechanics Home Furniture Making Library be sent you C.O.D. When the postman delivers the books, simply hand him $2.50 plus the few cents postage. POPULAR MECHANICS PRESS Popalar Mechanics Building Room 711, Chicago, 111.

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POPULAR MECHANICS ADVERTISING SECTION FarnS0 to*200aW You can! Hundreds of ambitious men are already earning thou- sands of dollars in this wonderful new industry — you, too, can get your share. Mail coupon below for Free Book which describes fully the amazing money-making opportunities in Radio and tells how YOU can earn from $5,000 to over $10,000 a year. HE astounding growth of Radio has created thousends of ‘% money opportunities. Millions of dollars were spent the past year on Radio, and thousands of youn needed right now to meet the ever-increasing Some ire needed to build, sell and install Radio sets—to design, pair —as radio engineers and executives —as operators at ms and on ships traveling the world over—as operators dreds of broadcasting stations. And these are just a he wonderful opportunities. “athe to Learn Radio at Home in Spare Time No matter if you know nothing about Radio now, you ing y become a radio expert, by our marvelous new ethod of | practical instruction—instruction which in- des all the material for building the latest up-to-date paratus. Scores of young men who have taken our course are dy earning from $75 to $200 a week. Merle Wetzel f Chicago Heights, Ill., advanced from lineman to Radio er, increasing his salary 100% even while taking se) Emmett Welch, right after finishing his g, started earning $300 a month and expenses. - graduate is now an operator of a broad- casting station—-PWX of Havana, Cuba, andearns Pioneer Radio School —established in 1914. Our $250 a month. Still another graduate, only 16 course is the absolutely complete one now being t is iveraging $70 a week in a radio store. offered which qualifies for a government first-class Wonderful Opportunities a ae ga It gets you the bigger paying Hardly a week goes by without our receivin en ee rgent calls for on graduates. ‘We need the Send for FREE RADIO BOOK services of a competent Radio Engineer.” “We Learn more about this tremendous new field and vant men with executive ability in addition toradio jts remarkable opportunities. Learn how you can ledge to become our local managers.’”’ ‘*We quickly become a radio expert and make big money in radio. the services of several resident demon- ators" — these are just a few small indications We have just prepared a new 32-page booklet great variety of opportunities open toour which gives a thorough outline of the field of Radio —and describes our amazing lates. lake advantage of our practical training and ractical training in detail. nusual conditions in Radio to step into a big his Free Book, “Rich Rewards in paying position in this Radio,”’ will be sent to you without the slighte:t obligation. Mail cou- Pay Increases | wonderful new field. pon for it now! a Month Radio offers you more ~ a a ag are offe ~— T am averaging any- ‘ a reduced rate to those who enr¢ Sis0 = ms on = than you prob- at once. Act promptly and save than I wasmaking | Ably ever dreamed money. beforefenrolling with . . . U would no ——jtascinati 4 Zar givens | POSsible-—fascinating NationalRadio Institute chfortheeourse. | €asy work—a chance Dept. 15MA, Washi och 20 N- Main Street, | to travel and see the pt. » Washington, D. Greensburg, Pa. 2 ld if Seeece see, SSM SSSR ES SEES ee ee eeee world if you care to or National Radio Institute, Dept. ee D.C. to take any one of the Please send me without the slightest obligation your Free many radio positions Book, ** Rich Rewards in Radio," ar d f E details of — sp cial € ‘ree 07 eT ~ ce Nease te ) \ course hae allaround youat home. offer and Free Employment rvi write plai foe And Radio offers you Name bites a glorious future! The ! National Radio Institute is America’s Age Address

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POPULAR MECHANICS ADVERTISING SECTION B He thought he could throw me- Dear Tom: You know how Ted Brown has always been saying he could throw me with one nar.d tied behind him, if he wanted to. Well, yesterday, he grabbed amp old of me and we had it =. Gee, I wish you'd been there You know ho much bigger Ted is ther He thought he had me licked dead easy— ul 4 I rg around and got a hold on him that I’d learned from the Farmer Burns School of Wrestling. The next second — FLOP, and I had Mister Ted Brown on the ground, yelling for me to | mT 8 a cinch to handle a fellow half as big again as roa are if you know the secret holds. If I were you I'd write to Burns School for their free book about wrestling. So long—FRED —_ Wrestling Secrets fon ere Or Learn the marvelous holds, breaks, blocks and tricks that will enable you to handle big, strong men with ease. The renowned FARMER BURNS— ‘father of scientific wrestling”—and FRANK GOTCH the world’s champior have prepared a series of lessons in which they reveal the inside secrets of training that will make YOU, too, an e» wrestler. All the great secrets of self-defense and jui-jutsu illustrated by printed word and picture. The lessons tea how to become a great athlete, and secret wee enabling you tothrow boysand men larger and stronger than y Farmer Burns School %, 1779 Railway Exchange Bldg, Omaha, Neb. ~ en or oo euenee send me at once without obiigaten 7 roe * 7 ‘ Ss é ) > estiin Fepaicl Gates, tattelnus and low te win. Our FREE ILLUSTRATED BOOK tells you all the advantages in health, vigor and respect that able to wrestle brings one. t tells you how to! become a skilled wrestler in your spare time. Br of interesting information about wrestling. Also lots *, tures. INVESTIGATE. Write today for he free book Address \ obligations. Tear out and mail coupon NOW , Farmer Burns School 1779 Railway Exchange Bldg Omaha, Neb. am =Start Little Mail Order - spp oot maga is Business—Free Book Name.... IRF STO GET DOLLARS OUT OF WATCHES. WATCH-REPAIRING. ENGRAVING, JEWELRY REPAIRING scroos Home employment evenings. Beginners Outfit { 530 W MONUMENT SQUARE, RACINE. WIS - Book Free. Pier, 842 Cortiand St., NEW YORK Make Money Drawing Cartoons It’s Easy To Learn When Shown In The Right Way Some of cleverest cartoonists and comic artists in America today learned to draw during t! time by following CARTOONIST EVANS’ SIMPLE AND EASY METHOD. This scho mended by foremost cartoonists because they know the students are handled right. If you | send a sample of your work, either an original or a copy, ng we will send you a portfolic of cartoons and L. details. The course is NOT EXPENSIV The W. L. Evans oes of Cartooning CLEVELAND, OMIO RAILWAY POSTAL CLERKS | $ 1600 to $2 300 Year o FRANKLIN INSTITUTE, Dept. $-180, ROCHESTER, N.Y MEN—BOYS, 18 UP Go Postal Gierk Examination questions? (2) List ot eovs Steady work, No layoffs. Paid vacations SF 7 14) Send i amale BF. lensene Travel—See Your Country /© name Common education sufficient. Mail coupon today—SURE 4 Address

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POPULAR MECHANICS ADVERTISING SECTION Do You Want $5000 .|a Year row bed mm ou'd Ted 0 I'd RED ns HERE is always opportunity for the trained tch man, very rarely for the untrained. If you re earning less than $75.00 a week it is not be- vith there isn’t a big pay job open, but because pion 1 are not trained to earn. Don’t go along in the ld rut, waiting for something to turn up. lake things happen by accepting ,the golden portunity that is open to you. a What Victor P. Klein Has Done Sail tewart Automobile School ' “ West 57th Street e } k City, N. Y. lemen: After graduating from your sehool in April, I obtained a position as mechanic with The Auto e Company, Pompton Lakes, N . and am now nership with the owner of this Company success in this line of work I feel is entirely due to ry thorough course of training I received at The rt Automobile School, and I will highly recommend y course to any one desiring a very complete course = Hh automotive mechanics Yours very truly, VICTOR P. You Can Do It Too ned Thousands of men have found the ceess by training at the Stewart school in New York. They have done it—so ns an you. Many Stewart graduates own. their wn businesses or are in executive positions — irecting other men. It is so easy, so simple to complish, that a man has only himself to blame a eee he is not on the same road to success within folio of lew weeks. Bui! ding Individual Instruction oe The lack of technical education or experience es not bar you from the Stewart School. You ork with tools, not books. Each student receives sonal imstruction; his individual characteristics ¢ studied by our instructors. You do not leave Subject until you are satisfied that you know nd understand it thoroughly. You are not rushed through the Stewart School. ESTER, N.Y Our shops are splendidly equipped. Each alls lillerent phase of the automotive and garage nat Susiness has a department to itself. These de- KLEIN, way to Automobile artments include automobile mechanics, tire vul- anizing, battery manufacture and repair, advanced } eectn cal and ignition work, etc. after a few weeks’ training in New York? No Worry About Expenses You can earn expenses while you are training provided you have a clean record and can furnish satisfactory references. Our Employment Depart- ment has been very successful in getting jobs for worthy students and in placing graduates in good positions. Our welfare manager arranges for your room and board within the limit of your purse while you are at the school. Big Free Book All of the above is described and explained in the fully illustrated catalogue which you may obtain free by sending in the coupon below. A scratch of your pen will bring you F REE book. In it you will read letters from former Stewart students telling how they have succeeded in life by grasping opportunity—the same opportunity that is yours today. It tells of the advantages of training in New Yor} —of the ideal location of the Stewart School Details of the courses—subjects, tuition, etc., are given in full. Mail the coupon today. to SUCCESS for you. this time, It will open the door ANU Wire \ eh Ms 4 STEWART AUTOMOBILE SCHOOL (Founded 1909) 225 W. 67th St., Dept. 1759, New York, N. Y Please send me your free book that describes your school and the opportunities in the Automobile Business I am under no obligation Name Address Cty State

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POPULAR MECHANICS ADVERTISING SECTION tie When will You ‘pecome A Factory Manager? OU yourself are going to set that successful day when you become a factory manager. If you have the courage and ambition to move upward into a bigger salaried job as an expert foreman, superintendent or production manager, nothing can stop you if you are thoroughly trained in the important fundamentals of factory management. Our book, **Advancing to Success” tells you how you can quickly step up into one of these bigger salaried jobs. This book is now free. If you have the ambition to succeed, this very moment is the test of your will. LINCOLN EXTENSION UNIVERSITY, ine. Louis S. Vosburgh, Pres. Department A CLEVELAND, OHIO Any One Can Play the Jazzy JAZZ-O-NETTE Absolutely New —Nothing Like It The easiest to play wind in- strument known. It’s a wonder. Anybody—boy or girl, man or woman, can play any jazzy tunes they know the day Jazz-O- Nette arrives No knowledge of music necessary. Plays likea slide trombone. Plays all flats and sharps in any key. Become an Entertainer This is not a toy but a real wind instrument used by vaudeville actors, entertain- ers and in orchestra work. Big 10 inch, highly polished, seamless brass horn gives appearance of $50.00 instrument Amaze your friends at home—play for parties and dances there's lots of fun and money in it Be popular everywhere you go. Hundre is of dance orchestras now featuring this jazzy Jazz-O-Net B the first to start it in your town. SEND NO MONEY Send only your name and address today. When Jazz arrives, pay the postman our low introductory pric« $6.50 plus a few cents postage. Satisfaction guarante¢ the first to play the Jazz-O-Nette—surprise your friend Y can get more reai enjoyment out of this than playing pia banjo, saxophone or other musical instrument If n t fied after 3-day trial—you get all your money ba A points outside U. 8. send $7.25 with order. Mussehl& Westphal, 746 W. Water St., Ft. Atkinson, Wis. How to Get A Position with the U. S. Government Thousands of appointments are made yearly. Good salaries—short hours—liberal vacations (as much as 50 days in some branches of the service). Positions open now in Washington and other cities and in Alaska, Porto Rico, Hawaii and the Philippines. “Pull” and influence unneces- sary. Common school education sufficient as groundwork for most positions. The International Correspondence Schools will pre- pare you right at home to pass your Civil Service examindtion with a high mark. Mail the coupon to-day for 48- page Free Civil Service booklet. Beige .S cgeagpears xe pe nie — ew ee INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5663-D Scranton, Penna. Without cost or obligation, please send me a copy of your 48-page CIVIL SERVICE BOOKLET, which tells how I can secure a good-paying posi- tion with the U. 8. Government Name = = we oe oe ee oe eee me ee Address Spee: aid an én am an an an im =n an am an oe a eed A Library of 5,600 Ideas for SHOPMEN and HANDYMEN In 14 compact, thoroughly illustrated and inde) volumes you may have nearly 6,000 ideas t! prove of many dollars value to you. Sing from these books have made profits for some ! amounting to many times the cost of the enti ry. Some have learned how to make things to Others have learned how to make a device t! ened labor to such an extent that expense was ly reduced. These are books for Shopmen Mechanics Machinists Home Owners Farmers Boys There are 14 volumes that make up Popular Mechanics Shop Notes Library. The price for the entire library is only $6.50. ee POPULAR | TASY WAYS 10 Do 5 | POPULAR macnn a PRESS Single Volumes 50 cents “Se CHicac POPULAR MECHANICS PRESS Room 507, Popular Mechanics Bldg., Chicago, '!/ —— al

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POPULAR MECHANICS ADVERTISING SECTION ie er Newspapers Rewspaper Telegraphers DAILY NEWS couldn't ‘arses the boys away from the key if you ‘ a stopped their pay! Imag ! eiving and sending the news of the world while u's hot—sensations features, police, ot of I a \ R. R. Telegraphers cr Commercial Telegraphers nioy wheal mony men pod erry oneder is the moat fas- ~e é Bt pe training makes you an 7 ‘ le «¢ DEL DUNLOP holding down any j at. r At 21, was the nah i ew pungest leer in 6 to 10 Months! Social raed fr te The DUNLOP System in — e Dun- Men, Women, Boys, Girls! In my school, I train lop System. In charge of ue is the only internationally known and universally u under the same conditions, on the same teleraphy ae wm / + ii : war for U.S. World's recognized standard of instruction in Telegraphy. I equipment as you will find when you're greatest telegrapher tewented the out on the job! Most complete, costly system and the method for teaching it equipment ever assembled under the It bears my name and you can get this complete, roof of any one school practical, rapid instruciion nowhere else Make $65 to $100 Every Week No work on earth like Telegraphy. It gets under your skin, makes you forget it’s one of the best paying trades you can follow. W he ther railroad, commercial, broker’s or newspaper teleg- rapher, you’re so interested in what you receive or send over thie keys, many a time you'll forget it’s time to eat. By the Dunlop System you can become a real Expert in only 6 to 10 months No book-study. All practical, actual work. Romance — Adventure for Ambitious Men! ind for Licensed Wireless Opera- If you want to become Telegrapher for, say, the New Yor great ships. Many big pay posi- \o) Central R. R.—my training not only gives you complete Teles tadio waiting for Experts to take raphy Instruction, but in addition I train you in New Yor Get ready quick here! Get my Central official rules of operating traffic and block signal. If atalog and find out how easily you can be- Cc you're out to be a Western Union or Postal Telegraphe come an Expert Wireless Telegrapher I prepare you for that, including training in their rules and mé¢ tho xls Te legraphers find work anywher« Get My EARN While ee re You LEARN Pian! Big Pay Coupon! Confidential offer to ambitious men, women, D. J. K. Duntop, Chief Dispatcher oys and girls who have the hankering to be ex- ; Chicago Telegraph Snetiouse, . pert Telegraphers. Most liberal, most sensa- Dept. 201-1338 S. Michigan Ave., tional and surprising offer ever made by any Chicago, Ilinois. 5 a ae school. Coupon brings it. Write for it today! —_ — a. Nake J [) Broker's CL) Newspaper’s (0 Wireless D. J. K. DUNLOP, Chief Dispatcher \ Telegrapher Chicago Telegraph Institute aes - 201-1338 S. Michigan Ave., Chicago

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POPULAR MECHANICS ADVERTISING SECTION Choose as Your Profession ELECTRICAL ENGINEERING Electricity offers a brilliant future to the young man who is about to choose his career. Never before bas there been such wonderful opportu- nity in this great field. Big paying positions in electrical work the world over are open to trained men. B.S. Degree in 3 Years Come to School of Engineering of Milwaukee. Here you are trained in both theory and prac- tice by a faculty of experts. You learn in large, finely equipped laboratories If you have 14 high school credits or equivalent, you can become an Electrical Engineer with a Bachelor of Science degree in 3 years. If you lack these credits they can be made upin our Institute of Electrotech- nics in a short, intensive course. A Complete, Practical, Electrical Education Learn by the thorough approved scientific methods which our twenty years of specializing enable us to give you. In addition to Electrical Engineering, the following complete courses are given: A. C. and D. C. Armature Winding—Wiring and Testing—Prac- tical Electricity — Drafting — Electrotechnics — Commercial Electrical Engineering—Automotive Electrical Engineering and Automotive Electricity. EARN WHILE YOU LEARN You can earn money to help defray your expenses while learning. Our wonderful co-operative plan brings an Electrical Career within the reach of every ambitious man. Our Free Employment Depart- wish to earn part or all of their expenses. In ad- dition, the Department will help you get a good Opens training is completed. Daily Broadcasting January 5th W.8.0.T Mention the course that interests you most and we will send F He E E you special information. Read about the school that trains te to get the training that will enable you to step to a splen- did position and a handsome income. Mail the coupon right NOW. No cost or obligation. ment secures positions for those students who New Term position in the Electrical industry when your Big Book Mall the coupe » today for our ir new illustrated catalog men for practical and quick success. See how easy it is for

Play Piano Without Notes ——“SIMP »LE ASA-B-C. 300,000 c! grown-ups have learned. No knowl “music and no teacher required; no le Sent by Parcel Post, FREE, postpaid, on 1 mous vocal and instrumental selections printed derful new Easy Form Music way. SEND NO ‘MONEY i you don't learn in five days t . pieces, send it back. Or it pay. omy 6¢c for e Mey — A. tion. No extra charges SPEC . HALF-PRICE OFFER LASTS! Be sure ¢ many = keys on your piano or organ. EASY METHOD MUSIC CO., 1239 Clarkséh Bidg., CHICAGO ttle) amels mw Biba?) Opp ror tunities in ren a

Hundreds of big-pay auto jobs open im California. Be an auto of M i Iw a u k e e mechanic, electrician or demonstrator salesman. Learn by actual Dept. P.M.1224 415 Marshall Street. Milwaukee. Wis. shop practice—earn living expenses while learning. Write today ee for Big FREF auto book—explains everything. al School of Engineering of Milwaukee Dept. P.M. 1224, 415 Marshall St., Milwaukee, Wis. PNATIONAL“sencoi" “ist 4004 So Figue Please send me your free illustrated catalog; also details of ch your “Earn While You Learn” plan. 8% Nam io pe Lat t S Ge re 100 est Songs 25¢ Address y Py SS Gallagher & Shean, All for. | J Xe of Mike, 3 0” cock in tee Morr ] "Ow >» Peg ‘O’Neil, arolina he Siang ys} P itecnine. Smiles, Indiana, Michig we > and many others. Comic Dia! . AGO. ccccccccccesccsececcses Complete 25c, 3 for 50c p. p B J.C. Dorn, 723 S. Dearborn St.,Dep!. 3, Cricage Course Wanted = — Ae. RACING BODIES for FORDS at $3.4°| n Send today for free pa z Government Positio ticulars. Our book “How to Bull) Ht si i ns a Ford d Racer” sent : anyw a Those who wish to secure life positions in the vp cen, on gy, Chcmebaapes i United States Civil Service at from $1,400 to CENTRAL AUTO SUPPLY CO., Dept. 120A, LOUISVILLE, KY.| $2,500 a year, should write for the catalogue of the oldest Civil Service School in America, the ibre- | ite Limbs A Easy Payments—Do Nature’s Work. . COLUMBIAN CORRESPONDENCE COLLEGE | | qcittan WANTED who uso Artificial Les. : , 0. C~ EF me P HENNEPIN ave e DESCRIBE stUMEY TO WORMAN CO. SANEAPOLIS. MINN.

BATTERY Zit 8S HOUR Exarcine HB Users everywhere are addin HB Constant Potential One- PAYS BIG PROFITS $150 to $300 month! to their income with ay Battery Chargin. . No experience needed. Outfit comes complete with all necessary equipment for ~y F $35 cash. Your big monthly profits easily carry the smal! monthly payments ree trial on money back guarantee. More HB’s in use — any other make. Get ready for big winter's business in battery chargin Mal- those big, easy profits, Write for particulars and free bulletin 387 she showing <ig earnings of battery shops using one day charging system. HOBART BROTHERS COMPANY, Box M12 TROY, OHIO

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POPULAR MECHANICS ADVERTISING SECTION 63 No Longer a Secret- Every Man Can Have It! Most people think I was born strong, in fact they remark, “It was born in him.” Let me tell you I was not. From the time I was born I was the same as any other human being—normal. My talents were always directed toward physical development. I liked to lift, pull, perform feats of strength and to exhibit a huge muscle. Sort of natural for a boy, isn’t it? As I grew older, I gave more time and study to the scientific developmént of strength. A Different and Better Way! l can spare you many a wearisome hour. I tried all manner of courses and none came up to my expectations. Naturally I could only resort to my own resources for the development of a practical scientific course which would satisfy myself. I learned by actually performing. Thus I am able to offer a course which is fundamentally om tried and true. , I don’t ask you to accept something that isn’t practical. CHICAGO rt Reveals It All 34" w to Build WILLE, KY.| a ey \ INEPIN AVE LIS. MINN =< oe strength and id, by simply fol-. ng the methods I ou. And in a remark 'time! Then you too say, “A dida’t atsjnk it possible.” W hat t Does 1 am talkin the bottom of my heart. | vn Fo only the plain truth. I bend inch iron bands around my arm as 2 @iece of ribbon. Bend horseshoes with my hands more easily than the village Blacksmith. Drive nails thru oak planks arg metal. Sup- port tour thousand p of Ver- mont granite on my chest#while six husky men slug away at it With heavy sledge hammers. Is it beyond reason that | am continually referred to as “The Super-man of the Ages?’ Do You Want Strength? Ask for it—say “Breitbart, I want health, vitality, and pep.” 1 will build a body — the super power to bend, k or crush at the mind’s command. That security in knowing that within \ those two arms of yours there is untold wer—is yours, if you will follow my nstruction. My course is simpler, uicker and more positive in its results, an any other. There isn’ta red-bl ed mian today who doesn’t want strength. Don’t Wait for this Book The demand for it has so for exceeded my expectations, that 1 have already twice increased the print order, since it first went to It is the most re- markable and and bmished book on strength one published. Coritains photographs of me performing those unique feats of strength, ve Caused countless prominent to attest their genu- ineness. T: *book turn to page 37. An actual p ph.df me driv ing nails thru oak p and metal. Now page 21. Bit b half with my teeth, supporting a moving On pames 32 and 33 the Ba BREITBART.. 1819 BROADWAY NEW YORK CITY GOTHAM BANK BUILDING

book, “Muscular power.” It is yours. Don’t hesitate—All I ask is that you en- close 10¢ tocover postage and handling. t a 7 Do You Know Your Own Strength? Something new — unique. Breitbart’s famous muscle meter! Shows the size of my muscle. Compare yours with mine. See the difference. Use it three months later and see it then. Be a HE MAN. Send for it. Yours ie waiting. Clip and Mail this SLEGMUND —_ —_* Inc. pt. D-9 Gotham Bank Bidg. New York City lam enclosing a DIME for your new 64 page book Mus- cular Power. Together with your muscle meter which is free. Ee . Street

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POPULAR MECHANICS ADVERTISING SECTION BIG MONEY Can Be Made At Hom Anyone can quickly learn to make show cards and window signs at home through our short cut method. Be your ow: boss. Our system of home instruction never fails. Make big money easily. Earn while you learn. E very dealer a customer. Signs that take half hour to make sell for $3.00 Write for full iculars and receive free bepehes, paints and dictionary when tak course Whz ps Will 1 Do Punneest tas, Bee Vs 1 soe fos I ese: ‘Toman even the ordinary hammer and saw carpenter is making Read Jimmy DeForest's Book But it’s the trained man, the master carpenter who draws the big pay, gets the steady job and becomesthebigmoney contractor.Learn | ‘The world-famous trainer and conditioner of Jack Demsey, Longboat, Firpo, Roosevelt, D the new short-cuts and methods of modern carpentry. Do better work. Elbert Hubbard and many others has written Draw bigger pay. Make yourself an expert through spare time reading. “Physical Fitness and the Pay Envelope," FOR a book for ambitious men | De Forest bases his book on the accepted fact that the physically fit man commands the big income. it's full of meat. Ten cents IT § to cover postage and mailing brings you a copy. s . ss ae big volumes—2,200 pages, 1,000 charts, blue-prints and pictures. Jimmy De Forest Physical Training System ig type—easy to read and learn. Covers entire theory and practice . of Carpentry, Building, Contracting. Shows how to 347 Madison Ave., Dept. 64, New York City use tools, draw and read plans, make estimates, Zim figure profits, etc. Practical, simple, complete. a 4 . Sent To You FREE Be An Officer Send no money— just the coupon. Examine set a week with our in the U. Ss. Coastguard compliments —then deade. $1 & 500 No obligations. Send cou- : 700 Up te = 7, - ered t cr e ef le on now and get this master eg a es Carpenter Set. Pay only to prepare you in time for Academy Examinat $3. monthly if you deci requirem a 18 to 24. Write Dept. L-i4 informati« to keep it. Coastguard Preparatory School, 1653 Pa. Ave. , 8. W., Weshington, D.C

Bea Diamond Expert Do you know that of two diamonds of equal size one opt. G-919, Chicago, U.S.A WA i worth a hundred times as much as the other? Who ca . Please send me the 5 volume set of Carpentry and Contracting for one X af guish them but an expert? My short easy course wi week free examination. If satisfactory I will send you $2.80 within 7 a diamond expert days, and $3. monthly until the special price of $19.80 is paid | Ve $5,000 to $15,000 a Year! FREE! : : Genuine uncut Jewelry houses everywhere need expert diamond men w Name ——________— | diamond if you name their o »wn salary! I will show you bow to make t | enroll at once! Booklet **‘Paying Diamond Knowledge’’ sent free | CODINGTON SCHOOL OF DIAMONDS, Dept. 503-4 | 3457 Sunnyside Chicago, Illinois | ' Referenc av sm RADI Receiving Set : val GIVEN BARNEY OLDFIELD’S MECHANICIAN! | g Tele gontertel Bee Ott rie pt Lad for ogling 24 oreo A rtan Lean an hour a day of your spare time to **Dash * formerly me- Pictures a ic em chanician for Barney Oldfield. Big demand for * *Dash’’ trained men. also c ~ ching lessons. Common education sufficient : TRAVEL—SEE YOUR COUNTRY .” .

AMERICAN TECHNICAL SOCIETY ». Bask, tb

Address

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or, N.Y way ted , POPULAR MECHANICS ADVERTISING SECTION 65 Take Your Choice—Any One FREE VALUE free to pupils. you want to learn? Everyone Loves Music r wonderful new system enables everyone to rn to play their favorite instrument in a few y lessons. You can learn to play any of the ments shown in a remarkably short time. Your spare time will do and it only costs a few cents a week. No charge for the instrument, the lessons. That is your only expense. Why not mail the coupon today? You can be laying real music BY NOTE before Christmas f . 1 uu do, 7 Play by Note in 4 Lessons new system is very simple. Anyone can understand it. You can be playing standard music in 4 lessons. We guarantee this. pay nothing if you fail and only a few cents 1 week for the lessons while learning, nothing lor the instrument you want. Every lesson is omplete; you go along in easy steps. Learn to either for your own pleasure or for profit. not wait longer to become a musician and e popular among your friends. Slingerland’s Correspondence School of Music Dept. 2 Lincoln Park P. O., Chicago, Il. T VIOLIN, MAN- DOLIN, GUITAR, UKULELE, HAWAIIAN GUITAR, BANJO, BANJO MANDOLIN, TENOR BANJO, CORNET or BANJO UKULELE Which one do you want? Send no money FREE And Learn to Play AT HOME in Your Spare Time for Profit or Pleasure These high-class instruments are actually given away. They are Which instrument do just the coupon. Your Success Guaranteed This is the most remarkable offer you ever read. Just think—the instrument FREE, only a few cents a week for the lessons and your success guaranteed or money back. Why should you delay? You have everything to gain and noth- ing to lose. Send the coupon now while the Free Instruments Offer is good. We reserve the right to withdraw it at any time without notice. You may never have the same chance again. Send the Coupra. If you own a piano, organ or other musical instrument and la a t and terms. want to learn to play i rite for special bookle | COUPON | Slingerland’s Correspondence School of Music | Dept. 2, Lincoln Park P. O., Chicago, til. | ..F REE and learn how to 1 I Name of instrument) play it by your easy method. Please send me full particu- lars and detailed information, ligate me in any way. I want a_... This request does not ob- Name... Address CRO cndaneiennitinnmiins

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POPULAR MECHANICS ADVERTISING SECTION WANT you to succeed more than anything else in the world, and know you can if you will try I am doing my part 'y making my tuition rice so you can come right now to this N orld Famous Automobile School— you've wanted long to come to this Million Dollar Sehool, but you just eouldn’t see how you could make it Now it will be easy and | am sure are going to come I've raised the aries of thousands of other fellows do it for you. Just as long as you keep drifting, it will be the same daily grind year after year, but if you decide now to come here, spend a few weeks in actual ‘Learn by Doing” training, there's a good job paying big money ready for you. E. J. SWEENEY, President. Auto Mechanics $125 Month and Up Get the BEST and Get It for LESS rhe Million Dollar Sweeney School Build- ing is just across the Plaza from the Union Station, and stands at the foot of beautiful Memorial Hill upon which a $2,000,000 building is being completed It is 10 stories high and covers 12 acres of floor space Every foot is devoted to practical instruction and floor after floor filled with the very latest gas engine, electrical and radio equipment for you to work on Scores of expert instruc- tors all trained under the Sweeney System to work with you The Sweeney School is a smnall city in itself. Sweeney SUV ENG And Now So You Can Start Cuts The Your Training Tuition Ls At Once I KNOW this is a radical move on my part, but it is the impossible t] ilways like to do and this has been a big factor in the great success of in turning out over 60,000 graduates, and I estimate of that number 20,000 of + are making big money in their own business. Seo if you will come right now | will cut the price just exactly one-half. | further guarantee you the same hig practical instruction under skilled instructors that has made the Sweeney Aut and Electrical School World Famous. Learn A Trade But Learn It Right Look at the views of my students doing actual work. These boys know they will soon be ready to take positions in any part of the country, paying from $150 to $500 a month and more, or owning their own business You can do it too. Just picture yourself in a few weeks as a skilled mechanic holding down a big responsible high salaried job or running your own business. Decide now to learn a trade. ‘There's only one way to learn if you want to save time and money and be properly trained—The Sweeney System of Practical Instruction. You get this at the Million Dollar Sweeney School and you get it nowhere else. These photographs show only a small part of my $200,000 equipment. When there's anything new in mechanical equipment, Sweeney will have it I Cut the Tuition Price One-Hallf to Make It Easy for You to Come Now Mail the Coupon Right Now Or Wire Me When You Will Be Here Welding Experts $150 Month and Up I want to prove that you can do what thousands of men in just your px as a result of Sweeney training. Take up the Auto Business now. Learn it at Sweeney’ Ask any Sweeney Man They are in good positions all over the countr selling Autos, driving cars and trucks, mechanics running garages, tire stations, welders, handling radio supplies. Right now over filteen millicn « a big increasing demand for servicing these cars With tuition price cut ¢ there is nothing to keep you from coming right now But remember this offe only for a limited time So, Don't Delay another day—you want Saving—If you write me now—Today—you will be sure. LEARN AUTOMOTIVE & N-31 SWEENEY BLDG.

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POPULAR MECHANICS ADVERTISING SECTION

This Is the Most Amazing Offer I Have Ever Made Since the ag pe of My Million Dollar Building Six Years Ago | know there are thousands of you fellows right now ready to take the first step toward independence. former tuition price has held you back—you were afraid you could not make it. Now | am making it easy for you—just half price. You must act now—not next week or next month. This offer is for mited time only. I’ve got everything here you want—expert instructors—the best equipment obtain- ver $200,000 invested—over $50,000 invested in my big Radio Station, WHB. The Man Who “Knows How” Gets the Big Paying Jobs The biggest salaries in the history of the Automotive and Electrical business are being paid to men who “Know How." The Sweeney trained man is in demand everywhere. If yor are mechanically inclined, come right now to the Million Dollar Sweeney School. I teach you by doing actual work. You'll wear overalis, get your hands and clothes dirty and greasy, but you'll learn everything about all kinds of automobiles, tractors, oxy-acetylene welding, vulcanizing battery work, electrical work, building anc repairing radio sets and in a few weeks be able to cash in on your time. No previous ex- perience or education is needed. You only TTS z gees to es te work. The Sweeney , ystem o raining is practical from Battery Experts $150 Month and Up start to finish. No Beaks are used, no dry lectures. You work with your hands on most 1 pmens, gots ainable. From your very first day in the school you do actual work MAIL THE ies — The Sweeney System is the original ‘“‘Learn by Doing’ method, COUPON Just send me your name and I will send you my 64-page TODAY! big illustrated catalog. It is full of real pictures—shows how mechanics do all kinds of e xpe rt jobs. Lists the cppor- tunities in the Auto business. xplains step by step how A 7 Sweeney Students learn to be skilled mechanics. Shows 8 to fit yourself for big paying jobs I will send you this Free—no cost— Write for it today. I also want to tell you how Sweeney Students enjoy while training. The big swimming pool, reading and lounging rooms, enter- nd and orchestra concerts, Radio broadcasting. You just can't appreciate il opportunities the Sweeney School offers you and how much it will mean you come So, answer this ad now; | can't tell you how long my amaz- hold good. To be sure of this big saving, write me today; or, better still, en you will be here. No colored Students accepted. MAIL THE COUPON TODAY! E. J. SWEENEY, President EMORY J. SWEENEY, President N-31 Sweeney Bidg., KANSAS CITY, MO. i and Please send me Free your 64-page catalog 10ow I can get my tuition at Half Cost Q8 25 SH OS Ue

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POPULAR MECHANICS ADVERTISING SECTION ‘Another $10 Raise!” HAT makes the second increase in salary in a year, and I'm earning $45 a week now. That's pretty good for a girl. It certainly was a lucky day for me W hen I decided to take up that = = « course. Why don’t you study some special subject and prepare to earn more money? There’s no surer way to do it than by studying at home in spare time with the International Correspondence Schools. The I. C. S. has a number of courses especially arranged for women, & women students are making as high as $50, $75, and $100 a week as private secret aries, artists, expert letter writers, phar- macists, assistants in chemical laboratories, high-priced sales executives, office managers, advertising writers and sol and in Civil Serv ice and banking. Mark and mail the coupon and we'll be glad to send you interesti itive booklets telling what the I. C. S. can do for you. Mail the Coupon To-day eee eee Some icitors, ng descriy INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5662-D, Scranton, Penna, Without cost or obligation How Women Are for the position or please send me your 48-page booklet, Getting Ahead, {1 tell me how I can qualify in the subject before which 1 have marked an X: ) Adverti Civil Service iP rivate Sec cretary f High School Subjects ) Assistant Bank Illustrating { orporation Secretary ness English () Architecture Spanish f Drafting A reench [ }Designin [)Salesmanship [ Teleg rraphy [ ) Better Letters LJ) Wir dow Trimming C)Ste no -* ovr and {| Railroad Clerk { _] Dressmaking Oshow ri ‘ard Lettering (J Millinery Street Address... City Occupation in Canada should send this Schools Canadian, L Persons residing Geonal Correspondence coupon to the Interna- mited, Montreal, Canadgq, | | . . . University President Offers ¥ you a College Diploma by Systematic home study courses, and you com. plete the last few months of your work in Classes at the University. You at tend either Day or Evening Courses and are helped into a position for alter —_ 6-week periods to support you LOUIS Wine while finishing. RAPEER, Courses offered in Story Writing, Jour. S.B.AM nalism, Economics, English, Bu siness Ph.D., LL.D., Secretarial and 100 Other Subjects PRESIDENT Write for FREE CATALOG and fy (Gardens bat of information to Dept. L-14 Dept. of Euuca- tion at Pennsyl- Research University WASHINGTON, D. Cc. vania State Col- lege) fiz $75.00 a Week on the Side as ic Expert gickiy—durine your Tr wh... leading p botographer. "li show you how ty usiness—or alarge - formyunusua! offer—it’sonly Act at once. A postal will do. H. on. VANT. INTERNATIONAL STuDios, Inc. Dept. 1359, 3601 Michi Ave., C LEARN ENGINEERING (reat Demand for Practical-Technical Engineers. Big Salari Wonderful Opportunities. Thousands of our graduates ho responsible high-salaried positions. Practical- Technica! Cours from 3 Months to 2 Years in Electrical and Mechanical En neering. Simple and Condensed Method. Faculty of Tr perts. New Building. f xtensively I quipped Laboratories and s Department of Architecture. Structural and Mechanical I Degrees Awarded. Positions Secured. Day and Nig? Catalog D. FREE. Ask about our Earn While You Learn Pian. FINLAY ENGINEERING COLLEGE, Kansas City, Mo. numbersor trick music. Costs only 8c a: jay ask An realpiece by netein fifth lesson. Easy music free. Diplome ewer j +t or sdvanced players. Mx jarantee. d today for free book Al be eons in Tacotee wrapper. Pleas Foe tes ScHoor Learn Weeskrweuh, Jewelry work and Engraving. A fine trade commanding 4 ¢ salary, and your services are always in demand, Address Horological, Dept. P, Bradley Institute, PEORIA, ILL., for our latest catalog BECOME A RAILWAY MAIL CLERK Examinations coming. $1600 to $2300 a year. to get the job. Common education sufficient “pull” necessary. Mail coupon for Free Cata re Patterson Civil Service School Dept. 812 ROCHESTER, N. Y. Sirs: Send me without charge your Catalog, explaining your guaranteed preparation. sy No Patterson Civil Service . 812 Name

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ent loma nome com- " work ou at ourses alter- t you . Jour- Siness, Dyects id Jui sity Alar hok Cour cal Eng iT LT = bD arn Pian. ‘ity, Mo. ar ou No ay sey ra ) k se OL ¥ ngage a iwa »rological, St Catalog —— RK basy t. No i ‘son rvice ye) | . 812 nesters, » ve a POPULAR MECHANICS ADVERTISING SECTION REE Home-Study Lesson in DRAFTING Expert Draftsmen Earn $35 to $100 a Week Prove to yourself that Drafting is easy to learn your opportunity to try a lesson in Drafting home, free of cost, and to find out how well d you are to take up this interesting and id vocation; also just how Chicago Tech. in you at home by mail. We have thousands of successful graduates who secured their complete training during spare time, right at home, withcut loss of a single day or a single dollar of pay from their regular work. ize of Drafting is more than g-stone to a good job. It has suusands of men to find their yusiness for themsel ves—con- iilders, architects, inventors, ers, cte. ys good, big money to start, edge that reaches to the very pportunities worth while. Get ne of work that has a real it for you. No occupation roader field for employment lifferent lines from which to ialty. e« built or constructed today ed and laid out on paper— houses, buildings, izes, automobiles, radio cal equipment, etc The has the opportunity to to study every detail of con- ng in advance of building have an outfit, $25 Outfit Included A regular full-size outfit —like those used by practical Drafts- ships, man and Engineers when vou enroll in the Chicago Tech. Home Study Drafting Course ; credit is allowed on fees for the course Make up your mind today— now—that you are going to take this important step toward a bigger future—that you are at least going to find out all about Drafting and its opportunities. You risk nothing—not a cent You have everything to gain and nothing to lose. Chicago Tech. doeg not require enrollment and payment of fees in advance. Chicago Tech. is willing that you shculd try a lesson see how you like it - fore you make up your mind enroll or send us a single penny If you That is the sensible, the business-like thing to do in any event. Could any offer be more fair? Furthermore, if you comes to you not hard to learn under the Chicago Tech. plan of | correspondence instruction. Step by step, under an stematic plan, you will learn how to handle every job, piece of work, every problem that may come to the We have been training men for Draftsmanship v at home by mail, as well as in our day and evering sses, for more than 20 years. Opportunities Special to in a Builders hile you learn. For Carpenters, Srickiayers, » can come to Chi- and Other Men in Build splendid opportunity ing Trades—Se ond for Home- ) get this training in studyC atalog Band Free Book ago Tech. College “ How to Read Blue Prints. Evening Classes while Improve your knowledge and r expenses in part-time worth by mastering Plan s. If interested ask Reading, Estimating, Superin- . i tending and higher branches 2 page ‘Blue Book. of building fully covered in the Chicago Tech. Builders’ Course. CH IcAGO TECHNICAL COLLEGE Dept. 1230, Chicage Tech. Bidg., 118 East 26th Street, CHICAGO, ILL. enroll, and, upon completion of the course, are not satisfied in every wav, we agree to refund the entire amount of tuition paid, in accord- ance with the terms,of our money-back guaranty. Clip and mail the coupon now. It takes but a minute. Put off and you may not think of it again for a week—perhaps never. Our big home-study catalog, Free Sample Lesson Testimonials, and also the interesting success story ‘‘ Fourteen Words of Magic Power,” all sent without charge or obligation CHICAGO TECHNICAL COLLEGE : Dept. 1230, Chicago Tech. Bidg., 118 East 26th Street, Chicago, til. Without cost or obligation on me, please send catalog and | instructive matter about your home-study course in Draft- fascinating story book, “Fourteen Words of and FREE TRIAL Lesson Write or Print Name Plainly ing; also the | Magic Power,”

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70 POPULAR MECHANICS ADVERTISING SECTION RAILWAY «. D POSTAL CLERKS ! | . my poh TAT, if ow? we &s “a, * _— RARWAY POST oFrice” PERS SLI SSIS ITIL LEE Tir FRANKLIN INSTITUTE *e, Dept. S178, Rochester, N.Y. “s Kindly send me, without any obligation what- ™%, T R A VE L — Ss E E YO U R G Oo U N oy R Y ever on my part, and entirely free of charge: (1) *e, “ full description of the position checked below; 2) Specimen examination questions and free sam- oO a y ple cone hing lessons; (3) Free oo yy of ifustrated, r 00K, “Government Positions and How to Get Them"; (4) A list of U. S. Government Jobs now obtainable. Many Other U. S. Government Positions: ....Rallwa ($1600-$2300 “ty City Mail Carriers Internal Revenue Clerks ; Clerk 00-$1 gee “e City Postal Clerks Customs Clerks : Clerks at Washington, D. C. Clerk at Washin ston, D.C Y Income Tax Auditor.... % MEN —BOYS 1 8 OR OVER Shert Hours Pleasant Work Rapid Advancement Permanent Employment Long Vacation with Pay * «, MAIL COUPON NOW 651.7005 iin. *, TOMORROW MAY BE TOO LATE! Use This Coupon Before You Mislay It— WRITE or PRINT PLAINLY % ¥ hh”, / i : THA A ) \ Vell-trained artists earn splendid >. incomes. The Federal home-study . Course is a proven result-getter. If oy ; you like to draw, send 6c in stamps Brick - Plaster - Concrete - Tile Workers 7 for 56-page book “Your Futur Let AUDEL’S NEW GUIDES give you a Helping Hand Le State your age and present cocupstion. | FEDERAL SCHOOL OF COM’L DESIGNING Audel’s Masons’ and Builders’ Guides give 4 “3 601 Federal Schools Building 4 Minneapolis, Minn. information in handy form for Bricklayers, Plasterers, Tile Setters and all Cement Workers. Contain best . eT A Te 1 N approved outlines of work and Oo Be y-% y-% ry‘ materials, including instructions on , ‘ how to lay out and figure various jobs. . Be popular in every crowd. It is a natural desire for A working companion for the journeyman; ‘ on Gp eae Demanves $e | entertaining. ready reference for the boss builder; a 3 ys ; life of @ party, sought after and invited svery- practical instructor for the house builder. where. yt Rey hh. 4S at Giahe. pad 2 ties, lodges and theatres. No need tode\ ' AUDEL’S MASONS’ AND BUILDERS’ GUIDES of study and practice to be a magician. You ¥ ' 1100 Pages, 2067 Examples entertaining your friends before you realiz¢ S prove what we say we will send you Spe 2 B yd and starting —. Tricks « te These Pocket Size Guides cover teach you how to perform them n only 2 B cover postage. packing. otc. Cv fully and completely : Brick laying, § Ah mst enh gees, catalog is free. A. P. ° » 26 East Monroe tools, materials, bonding, mortars, cm We designs, setting "frames, foundations. aS WATCH, RING Given Tile setting, hollow tile, wall, roofing, a AND CHAIN ” setting beds, mosaic. Concrete mix- . " We American Stem ing, placing, re-inforced work, stucco, rereuiee aor: rguarentaa: 2 ase, Name waterproofing. Plastering in all its branches, wall board. Stone Masonry and Steel Construction for Masons. Estimating. @ VOLS. COMPLETE $6 ERE RR RRR RRR RRR FREE THEO. AUDEL & CO., Publishers, 72 Fifth Ave., New York: Send me for free examination Audel’s LILLE Masons’ and Builders’ Guides, 4 numbers, § —t A y price $6 If satisfactory, I will mail you $1 COUPON within 5 days and $1 monthly until paid. kK ‘A LIK Uf “KL HTba thr iff pd Z / 4 A Name éencans . : Address ie iat : Free Book, “How to Become an Expert Penman.” t ota ; specimens and tells how others became expert writers by the Occupation .... \ Method. Your name will be written rr if you enclos hay Reference .

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POPULAR MECHANICS ADVERTISING SECTION yourself—correct your physical defects—banish the ailments that make existence of misery and regret—throw off the shackles of Catarrh, Consti- ligestion, Dyspepsia, Bad Blood, Rupture, Rheumatism, Weak Heart, etion, Weak Lungs, Anemia, Nervousness, Poor Memory, Fear, Bad Habits, the numerous other results of neglecting your body and violating natural Consultation Coupon). Show them that you can and will be a healthy, vig- with a real man’s ambition, spirit and endurance—the powerful man that nd Civilization demand you to become. Get Rid of Your Handicaps ip your body and brain and get the joy out of life. You can’t be suce essful, wanted in the home, in business, in society—anywhere, without the health gth and vigor of a real man. People you come in contact with instinctively physical and mental condition. If you are not vigorous and magnetic k power, endurance and vitality, everybody will know it. You know how ngs affect you when you see them in other people. You know that nobody east bit of respect for a weakling. They can’t have confidence in a man that ip any moment on the scrap heap of worn out and useless humanity. You t have much respect for a business associate who was groggy with Constipa- low with Biliousness, weak, anemic and handicapped with Rupture, Flat Weak Back or some other physical defect—you wouldn't have confidence in a se bad living habits showed clearly in his face and bleary eyes—you wouldn't do business with or associate with an irritable, oy hy person with frazzled and a wretched, unreasonable temper. Now look at yourself with the same {re you guilty of these physical and mental defec ts? Do you not recognize y faults and weaknesses that have often robbed you of success in business, ce in society and cheated you out of the priceless benefits of real friendship panionship? Judge yourself without favor—then get busy to root out the ts of failure and make yourself a real man. Win Back Your Vigor and Vitality e help you as I have thousands of others. Accept my hand in friendship as ild a brother's and I will show you Nature’s Way back to Health and Happi- § I'll teach you how to get rid of the ailments and physical defects that are ruin- r body and brain. I'll build you up externally and internally, by the same methods that won for me the World's award as the finest specimen of physi- health attainment. I have dedicated my life to the task of rescuing sick, ailing J from the bog of Weakness and Poor Health and thousands of my pupils testify to the wonderful effectiveness of my methods. You can apply these principles with the same ed and permanent results. I want to yu—I can rebuild and restore you with = STRONGFORTISM IGNING THE NEW SCIENCE OF HEALTH PROMOTION e Principles of Strongfortism are based on my discovery—that internal mus- | cular harmony and strength is the Key to lasting abundant Health and Vitality. urt, Lungs, Stomach, Bowels, and other vital organs function thru virtue of tracting power of the muscles contained in their structure. Circulation, Diges- \ssimilation and Elimination are largely the result of internal muscular action. Strongfort Methods go to the very cause of all ailments and weaknesses and by illy strengthening and developing the important internal muscles, pro- 00% results when all other methods disappoint e you accept Strongfortism, you enter a new life. The results are immediate sitively thrilling. You feel the rich blood racing thru your body—you feel n LIONEL STRONGFORT th and power developing in every organ and structure y 1 acquire Vv ois ad ge. oaneent. of Rorwerd. dectered that ignetic personality You can’t fail with Strongfortism I guarantee a pose poe wen gd on x imen physical development ever seen. Get My New Book—it’s FREE “DO IT WITH MUSCLE” truth about the scientific application of natural law is ed in my wonderfully interesting book, “De It With Muscle.’” It will tell you frankly and plainly how you can your ailments and build up 100 per cent Health and Vitality. It’s absolutely free. Mark the sub- n the free consultation coupon on which you want special confidential information, and send a 10c piece § ne) to help pay postage, etc. I'll do the rest. Bend free book Right now-— TODAY. Lionel Strongfort Physical and Health Specialist Over 25 Years Dept. 1672, Newark, N. J., U.S.A.

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0 DELIVERS nema ONLY $1.00 brings this complete, scientific Violet Spe eam outfit to you. Treat yourself and family at home, save delay, costly doctors and medicines. Thousands use Vio- let Rays at home to relieve pain and sickness. The iden- tical outfits doctors have bought from us for years and with which they successfully treat many ailments, includ- ing those listed below. QUICK RESULTS-No Medicine Violet Rays work quickly, it’s scientific, goes after the cause. That’s why re sults are quick, permanent. Dr. Duncan, Kewanee, Ill. writes, “‘ Violet Rays is the finest thing I ever used . to relieve pain. treatments are so pleasant afl my patients like it.’ Use it yourself at home, you save Doctor’s bills. BEAUTY AID EARN CASH Brings natural, magnetic Men, women, without experi- beauty of health, no dieting, ence earn iberal profits in exercise or drugs. FREE book ®P@re time showingViolet Rays tells in detail how high priced $0 Peighbors. Proves. results ae - first demonstration. Sells on beauty specialists use ittoim- sight. Get attractive offer prove scalp and skin. and wholesale prices now. SEND FOR FREE BOOK Explains how Nikola Telsa discovered Violet Rays, how it works, why it heals. Tells what doctors and plain folks accom- Can he in ~ pg gc pain, disease and nervous trouble with jolet Ra Reveals Marvelous Shows charts of human body, a ‘ 7 - explains where pains start, how POPULAR MECHANICS ADVERTISING SECTION STOP USING A TRUSS Do Away With Stee! And Rubber Bands it's the Inner surface is Non-Si made adhesive to se- ping yet Nex. cure the PLAPAO- ad andW hat PAD firmly to the is Within n That ounts ‘ keeping the PLA XPAO continual- i ly applied and the from slipping. a Nostraps,bucklesor springs attached. Soft as velvet—easy to apply. FREE to 5,000 Truss Sufferers To the extent of 6,000 sufferers who may apply I willsend, ABSU LUTELY FREE, a sufficient quantity of the Plapao to pos- itively convince ‘them that this is the only logical, com: sense way of treating Euotare. Plapao is a highly astr medication placed within the Plapao-Pad and being abs through the skin, creates a wonderful feeling of reli fa a the same time tends to strengthen the weakened musc thus permanently close the rupture opening. The pro recovery is natural, so you’!l have no use for a truss—you « throw it away forever! Old and young have testified « oath that the Plapao-Pads cured their rupture—many of t long-standing, aggravat cases—without delay from v Patent allowed in U. S. and foreign countries. Awarded G Medal at Rome and peer ~ Prix £. Paris. —for a sufficient quantity of the P! Send No Money ; is sent without charge to enable ; t give it a thorough test; you pay nothing for this trial now or ever, Write for it and ull information today. Addres Plapao Laboratories, Block 1427 St. Louis, Mo. TOBACCO OR SNUFF HABIT Any form quickly conquered. No long wa results. Costs $1 if it cures. ‘Nothing i ig ay Ape ag Full treatment on appro’ DR.C.M.SIMPSON, 126W.44thSt. , Cleveland, 0. How Many Pounds Would You Like to Gain in a Week? If you are thin and scrawny and would like I will send you a sample of the genuine Hilton's \ absolutely FREE. Do not send any money—just your address toW. W. Hilton, 188 Gateway Station, Kansas‘ Deafness Perfect hearing is now being r every condition of deafness or hearing from causes such as Relaxed or Sunken Drums, Roaring o' Hissing Sounds, Perforated, Partially Destroyed Drums, etc. Wilson Common Sense Ear Drums —** Little Wireless Phones for the require no medicine, but effectively replace what is | defective in the natural drums. They are simple to ga which the wearer easily fits into the ears, where t invisible Soft, safe and comfortable to wear at - Write today for our 168-page FREE book or DEA giving you full particulars and plenty of testin WILSON EAR DRUM CO., Incorporated 4 349 Inter-Southern Building LOUISVILLE, * \) quij ‘iri ve

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POPULAR MECHANICS ADVERTISING SECTION ‘ Lap Automobil¢ Automobile. Automobile -Automobil& “Automobile Engineering sEngineerin§ :"ngineering :=nginecrin§ “ngineering Vo}. 1 : VoLI : VoL. Vor. W Vol.V Engine Princip!’ : Transmissions ; Motorcycles = Ignition Wiring Diagrams Cylinders eR. Axles 1s 3 Tractors Harters H Y Here at a__ indicated. More than one man has built up a paying business be- : quipment data and specifications glancewill cause he could not be “‘stumped”’ on any ignition or starting job. ro 1 separate sheet for each car) be found lata covering the car’s equipment. Whether you are ung on a repair job or ordering new parts or doing the You epair work, the specification sheet will be worth real 5 to you. tor output in volts and amperes—when relay should cut-in 9 tance relay gaps— model number for all units for ordering [ ‘s—hiring order—ignition timing—breaker contacts—valve et distance —size of clutch and brakes—lamps—etc. iri H A complete diagram of the elec- ring Diagrams trical systems on all standard cars aed: - shows exact location of generator listributor—ignition coil—resistance units—ammeter — witch—horn—circuit breaker—relay —signalsand lights battery terminals—etc. Every connection is clearly 9 * REE—7 days’ trial — FREE ner you are a garage owner, a service station manager, ter, repairman, car owner, or autosalesman, I think ee that the income of the average man in the auto- is in direct proportion to his ability to make good to his knowledge of automobile principles, operations, s. We claim that this work with its four new features Drums Se worth hundreds of dollars to any man thus employed and } Want the chance of proving it to you. Let us send you the mpilete e-volume set of Automobile Engineering for one a“ § iree use—test the books out on any one or on a dozen jots t re Have been troubling you—no matter whether on repairs, , Bes _ ie Systems, trouble shooting, or what not. If youdonot find a ¢ help that you need in this set, send it back to us at our aring oF Partially Send us the coupon tonight! American Technical Society CHICAGO, U. S. A. ed ‘LLE, KY. Trouble Shooting *‘What is the matter It may be with the ignition—battery —fuel lubrication—or what not. 58 causes of trouble, how to detect it, and what to co to cure it. 334 definite cures are thoroughly explained with the necessary diagrams and charts. Why the trouble occurred and how to cure it make this service fi worth hundreds of dollars to the trouble shooter or repairman Questions and Answers «thet you're stuck on the road or bossing shop repair jobs you have wished for a quick solution of ti-is : ~d that trouble —a solution that is ready-made and does not compel you to read three or four nages of explanation. In the questions and answers section every conceivable automobile trouble ha stated and the right way to correct it given ture been very automobile trouble and its cure indexed for instant reference alesleetanlanteoetententanteetetententestentestetetententan American Technical Society Chicago, U.S. A. Please send me a set of Automobile Engineering, for seven days’ FREE EXAMINATION, shipping charges collect. I will examine these books thoroughly and, if satisfied, will send $2.80 within seven days and $3 a month until I have paid the special price of $19.80. If I decide not to keep the books, I will return them within one week at your expense.

Name Address Reference........ ’ Please fill out all lines; give local merchant, banker, or em- ployer as reference A919 T-264

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POPULAR MECHANICS ADVERTISING SECTION

y Learn By Doing! Every phase of all branches of ELECTRICITY} Taught By Actual Practice In America’s foremost institution for trade training, Established 1902 No Books Used Individual Instruction Start Any Day A SPECIAL and SEPARATE Course in Igni- tion, Auto Lighting and STARTER Systems. Write for FREE 64-Page Catalog THE NEW YORK ELECTRICAL SCHOOL 44 West 17th Street NEW YORK CITY HOTELS WANT rym | SALESMEN WANTED WOMEN To sell new ene price line of men’s clothes. Seng FOR . tional values. nest all-wool goods. $23.50 POSITIONS Trained Men and Women | swit or overcoat. Nothing higher, Big commissi paid in advance. Earnings of $20.00 a da Ly SU 150, in BIG DEMAND Only a few lines left to place. Don't delay If y« t tic t " at once to Dept. 129, William C. Bartlett, ; 50, 0 ing. enough; if 2 media by is too | 850 West Adams Street, Chicago. slow, investigate what hotels offer you. 80,000 trained employees must be Ol mesimae secure od this year; no previous hotel | EARN PIANO TUNING AT HOME ° ISG experience necessary. - . Wonderfully interesting work in luxurious surroundings: many With our TUNE-A-PHONE, Action | aa opportunities for advancement to executive positions. Positions Model, tools, charts and lessons Pe paying $150 to $500 per month are numerous, meals and oi‘en can learn quickly and easily an 3 Y room furnished. We train you at home in spare time at moderace proper’ to make big money. Estb., —— cost. Course endorsed by many leading hotel men. Hundreds Money- back Guarantee. Diploma given. Amazit ig Surprig of successful graduates. Write today for Free Booklet H-166. in our free book, “ Winning Independence.” Write for it tod STANDARD BUSINESS TRAINI NG INST. Niles Bryant School of Piano Tuning, 40 Bryant Bldg. , Aucost., BUFFALO, N. Y. BUSINESS EARN $40 to $200 WEEKLY rete ee for at iio —j- é Fisishing Kodak Pictures. I teach this fascinating, profit- eligious ‘ures oney. a at eee by mail ae. oo eee to start. Give i fost your ” Sa by Mfeend yo mune es promp soun vice. Booklet on r Tee Gicsas CHIPMAN SYSTEM, 104 MITCHELL “BLS. SYRACUSE, ¥.Y. HOME “ane Co. 42 vi: Som St., GET GOV'T JOB: Railway Mail Clerks, City Mail Carriers, Rural + rs, etrSC Cee eceeeeeeeceeeesseeeeeeeeeeeeneeere Tes pang ? Franklin institute, Dept. $199. Rochester, City Postal Clerks, Clerks at Washington, D. C. o Gentlemen: Kindly send me, at once. an cory ae STEADY, SHORT HOURS Pd r out charge or any obligation on my part is 8 aha & rnment big paid positions obtainable. Ac’ 8 $1140 to $2600 a Year is, Vacations With Pay ’ O ean get one of these jobs. Send me also free s: oa Mail coupon immediately for full list of positions now & lessons. obtainable. Don't delay. a Neme Franklin Institute, Dept. S199, Rochester, N.Y. »* ? AGETERS 2c vccvcccccccccccccccccccccceccocccscoesoeceeees :

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POPULAR MECHANICS ADVERTISING SECTION y YOU CAN PLAY THIS |: FREFI ~I or Professional Style HAWAIIAN GUITAR <euuiy i HAWAIIAN JUST LIKE THE HAWAIIANS! |: GuiTAR BECAUSE OUR NATIVE HAWAIIAN INSTRUCTORS WILL SHOW YOU HOW! Be the Most Popular Member of your Set. Play ‘“‘What’ll I Do’’, ‘‘So This Is Lov Memory Lane’’, ‘“‘Minding My Business’’, ‘‘Fair Lady’’, “‘Lazy’’, “I inger Awhile’’. All the late song and dance hits. You can play First Selec- in Half an Hour and Harmonious Chords at ONCE, Entertain your friends. r ney. Don't be a wallflower. Be the Life of the Party. FAMOUS HAW AIIANS TEACH YOU TO MASTER QUICK.- ef THEIR SECRETS OF THIS FASCINATING MUSIC tructions you receive from such world famous experts as Lawrence aluki, Walter Kolomoku, Frank Ferera, Carl Seville and others are invalu- able. NO OTHER Conservatory can even begin to give youthe expert teach- ing and knowledge you gain through us. And remember, while it is conceded that the Hawaiian Guitar produces the sweetest music, yet its mastery by you will be simple and quick. We guarantee it ONLY 4 EASY MOTIONS —+o learn to be able to play any music, popular, dance issical, native Hawaiian Airs or old time melodies and hymns. Just think of it! You need never have read a musical note in your life. For that matter, even though you haven't the slightest knowledge of any musical in- strument, we uarantee to teach you to play just like the native Hawaiians. JAY NEW INVENTION MAKES IT EASY Here is your chance to learn -— play the most fascinating w t. Th ne of all instruments, the Hawai e mean i ere are ian Guitar, JUS T rt HE Yours Free strings tied to this generous HAWAIIANS DO, and in an | offer. You get it absolutely free as soon as you enroll amazingly short time. Our] for our course of 52 easy lessons, taught by real method is so simple, plain | Hawaiians. You can a, lose, so mail the cou- and easy that you begin a] pon at once for full information. piece your first lesson. In half ou’!l never be lonesome after an hour you can play it! Thou- Be Popular _ learn to play on this beau- sands of successful students ] ¢iful Hawaian Guitar. You can be the life of the party. prove this to be true. No mat- Don’t be a wallflower. Use the coupon for complete ter how little your knowledge | jnformation. r ail it riwht away, of music may be, you can | } positively learn to play by our plain,easy picturemethod. COMPLETE CONSERVATORY COURSE You get 52 complete lessons. An entire conservatory course. Nothing is omitted. Success is assured. It is the best course of Hawaiian guitar lessons in the nt rid. Real Hawaiians instruct you. This is the only Conservatory teach- ng H swaiian Guitar exactly as played by the Hawaiians. It is your good fortune is well as ours, that these Native Masters of Hawaiian Guitar come to this Conservatory to teach. That is why we are the largest and the best knowr Conse rvatory of the kind. Your success is assured when you enroll. ANYONE CAN PLAY We guarantee it 40,000 pupils rove it. You don't have to Aa now music Our picture ny method makes it easy, Don’t§ — a be afraid to try it. “? WE FURNISH YOU \ With EVERYTHING you enroll as a student te in 8 conservatory, you receive FREE a handsome, sweet toned, Genuine Haw- Guitar—valued at $15.00 hd w © ~

WORTH $15.00 Yes, that is the price charged in the music te stores for these beau- tiful Hawaiian Gui- tars. We can afford togive them away free of charge to every pu- il because we manu- acture them in huge quantities in our own factory, which is the largest stringed in- strument factory in the world. SWEET TONED You will get the same haunting, soothing, plain- tive fascinatin tunes that the rea native Hawaiians get vn these same instruments. Piays any kind of music. 40,000 satisfied pupils prove all our claims are true.

ining,

a. py eby, & wail) sal earmin York Sparel ime ae ed

promptly. pecially arranged les- Pe ve Lis , as well as all the nec- CHIC. Picks, Steel Playing . tc. There is NOTHING

to buy; everything is shed EXTRA! As a special offer to readers of this magazine, we Ja Dept. 48, 233 B’way, Woolworth Bldg., New York, N.Y. supply 52 pieces of music as a part of the course of Gentlemen: Of course I want to get this handsome $15.00

Study the pictures of the good times you can have at parties, ‘.™, ; Hawaiian Guitar free of charge, because I am interested ete. Get in on the fun. Don’t pass up this chance. Send the coupon C4 in learning to play it. Please mail full information about at once for information and proof. ea your 52 easy lessons under real Hawaiians, one proof \ that I can play a piece after the first lesson am not obliged to enroll unless I want to chester, M

FIRST HAWAIIAN CONSERVATORY OF MUSIC Dept. 48,233 Broadway (Woolworth Bidg.) New York, N.Y. ( SPECIAL COURSES unctn,comous| a cacti | 5ANJO, VIOLIN, BANJO-UKULELE ANO UKULELE 79

| | a eh a ee seal | ‘| THIS COUPON MAKES IT EASY _ {=e site aiiiiiatan

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POPULAR MECHANICS ADVERTISING SECTION ELECTRICITY! Earn®3500 to*10000a yeu: as an Electrical Experi What’s Your Future ? Some Features ol Cooke Training That Make

Now you earn $20 or $30 or $40 a week. Inthe SUCCESS Certain “thee 2 ° . 1. Practical Money-Makine Lf same six daysas an Electrical Expert youcan make tion —no useless, hig! ; $70 to $200 and make it easier—not work half so a. Pree Sete Owns is - ° ° . iment and practic hard. Why, then, remain in the small-pay game, in 8. Free Employment ser ad ad you get a £000 job a line of work that offers no chance, no 4. Free Consulting Ser chance to get stuck or ° ° ° > 7 hilestud Zz or after big promotion, no big income ? 5. F ree. subseription : ~* - 6s . , ngineering Magazir Fit yourself for a ‘‘bossing”’ 6. Free use of my Big Fleet - < oratory and Free ro ; M.C. A. while visitiz job— 7. Extra Courses Fre« I Electrical Drafting Be An Automobile klk Mine Flectricity I Lesson on Health and * - 66 8. Spare Time Work—Sp« while-you-learn lessor a 9. Reduced prices on a Supplies 10. Cash Refund Guarante¢ | ) 55 These features are all explained in \ ¥ my big Free Book— the “Vital Facts” »,

Today even ordinary Electricians driver’’ kind—are making money. But it’s the traine« man who knows the whys fores of Electricity tl cal Expert,’’— who **boss”’ the ordinary to boss the B jobs that pay $10,000 a \ |

Neither L. L. Cooke nor the Chicago Engineering Works are connected, directly or indirectly, with any other Schoolor Institution teach- ing Electricity or any other subject, by the Home Study method. You can only get ** L. L. Cooke” training through theChi- cago Engineering Works. a,

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POPULAR MECHANICS ADVERTISING SECTION 77 an) will train you at home riito fill a Big Pay Job ¥ $3,500 to $10,000 a Year Get in line for one of these ‘“‘Big-Pay Jobs”’ by eurolling now '® Bor my easily learned, quickly-grasped right-up-to-the-minute, * BSpare-Time Home-Study Course in Practical Electricity. Age or Lack of Experience No Draw-Back z, You don't have to be a High School graduate—it isn’t even necessary hould have finished the grades. As Chief Engineer of the Chi- Engineering Works, I know exactly the kind of training you need, and Y | will give you that training. My course in Electricity is the most simple, successful and practical in existence, and offersevery man, regard : education, or previous experience, the chance to become in a few +} “Ln re me = _ k > 70 29) short months, an “Electrical Expert,’’ able to make from $70 to $200 a week. Earn While You Learn e you do practical work—-at once. In my first few lessons IT show \ to make money doing Electrical work in your spare time. (Over half dents are paying for their course in thisway.) I show you also, how t rtedin business for yourself, and then help you to get started. ined in Facts” “sce@a FREE—Electrical Working Outfit— FREE lo spare time work you'll need tools, etc. These I give you—Free luding measuring instruments, a real electric motor (no 1 other things—the greatest value ever given by any school. our Satisfaction Guaranteed by a Million Dollar Institution guarantee to return every penny paid mein tuition if when you Course, you are not satisfie din every way with my instruc- k of me, in my guarantee, stands the Chicago Engineering n dollar institution. Nothing Like “Cooke” Training Anywhere en ning is different because it’s the most | most successful. It's best because it’s the greatest Service to students ever It's this Service, plus ““Cooke"’ training, the “Cooke” trained man the “Big Pay” ere. Becomea “Cooke” Trained Man earn $12 to $30 a day—$70 to $200 a &—$5,500 to $10,000 a year. “5 : . nvestigate! Mail Coupon Get the Vital Facts. Let me send you free my big mw book on The Future of Electricity. Let me tell ‘about the big demand for ‘“*Cooke”’ trained ctrical Experts, Sign and send me Coupon below. Z L. COOKE, Chief Engineer hicago Engineering Works, Inc. 2150 Lawrence Avenue 519 CHICAGO, ILL. eo = ! L. L. COOKE, Chief Engineer Chicago Engineering Works, Dept. 519 2150 Lawrence Ave., Chicago, Ill. Dear Sir:—Send at once the “‘Vital Facts on- taining Sample Lessons, your Big Book, and full particulars of your Free Outfit and Home Study Course—all fully prepaid, without obligation on my part NBM cccccccccccscccecsccocccceccescecs

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POPULAR MECHANICS ADVERTISING SECTION karn Motion Picture at Home New plan qualifies ree quickly | in time at home Ld t ofession. spare

250 a week and more. } at required. Our experts tra vovio’ CAMERA FREE Handsome Motion Picture Camera en free if you act o Takes real motion pictures on a ‘d professional film us all theatres. Earn money o' n Send for illustrated Book—FREE Write today for handsome, illustrated book explai:ing great tunities in Motion Picture Photography, also Commercia Aedis 7 1 Portraiture. News Photograph . details of FREE Motion e e t co $ 1 0 0 Picture or View Camera. Addr York Institute of Photography *P4,48C, 143.w. 26:0 St LITTLE over a year ago he was just a hand - ing , ’ — 4 NNN —an untrained worker doing ordinary work - conan o pays and getting an ordinary salary. : ant deme heads! tan dure, make cen _ and robes. “Come lete lessons. E asi ’ Then he decided to take up a course with the y quickly be men. | RU International Correspondence Schools. He studied % “. Write today for Free Taxiderm at home in the evening and in spare moments j Book. @ all about it. Every Fan m, Hunter, Trapper and during the day. : lature lov ft “|

a9 Pi Droits, _—— And success came, as it always comes, to men v who really study their work. In three months he became assistant foreman—then foreman—and then one day they called him into the head office to supervise all blue-print work. 0g today Weite for Free Book 9779 ‘Fhwved Bld. Oncia Neb, NOM

He's earning $100 a week now, and to quote the head of the firm—*‘That’s only a start. He has the brightest future of any man in the organization.” mail, : Make-up all kinds of fur ur garments. Learn giazin 2 ° and storage. Big demand — he need ior vase on s~m=gice in every neig'! 3 an hour in How much longer are you going to wait before time or a real — now end a fur sb taking the step that is bound to bring you ad- ~ book tails, No obligacion. vancement and more money? , Northwestern Fur Coe. *772 Sundertand Bi One hour a day, spent with the I. C. S. in OMAHA, NEBRAS the quiet of your own home, will prepare you for the position you want in the work you like best. Mail the Coupon for Free Booklet By Noteor Ear With or without music. Short Cours _ ———“«= = ini cae eee beginners taught by mail. No teacher requi: struction Course for Asvenees 3 -—_ Lea of Bass, 180 Syncopatec effects, lue armon es yg Oy eeeanes Chime, Movie and Cafe Jazz, Trick End : “ES ' Breaks, Space Fillers, Sax Slurs, Tripie Bass, W Without cost or obligation, please tell me how I can qualify for mony, S3lue Obligato, and 247 other Subjects, in the position or in the subject before which I have marked an X Playing and Musical Invention. 110 pages of RI BUSINESS TRAINING COURSES 25,000 words. A Postal brings our FREE Special © Business Management ()Salesmanship Waterman Piano School, 259 Superba Theatre Bldg., Los Angeles, Cal. Industrial Management [| Advertising Personnel Organization | | Better Letters Traffic Management [)Show Card Lettering |) Business Law [)Stenography and Typing Lj Banking and Banking Law | | Business English LjAccountancy(inecludingC.P.A.) [Civil Service Ks icholson Cost Accounting L) Railway Mail Clerk a Book keeping [JCommon School Subjects ? " ff Private Secretary H th Se 3

High School Subjects Spanish J French [llustrating C) Cartoening Wonderful, new device, guides your —— corrects your Writt TECHNICAL AND INDUSTRIAL COURSES | infewdays. Big improvement in three hours. No fail < C) Electrical Engineering CZ Architect plete outline FREE. Write C. J. Ozment, D-34, 5! Electric Lighting ae Blue Prints Mechanical Engineer Contractor and Builder t F P { 9 CTs Mechanical Draftsman L) Architectural Draftsman Machine Shop Practice 3

L)Conerete Builder 95 Pict Railroad Positions L}Structural Engineer f : songs, words and music; i) : Gas Engine Operating LiChemistry © Pharmacy Girls; 40 Ways to Make Mone} l Civil Engineer L) Automobile Work Book on Love; 1 Magic Book; l ~*~ Surveying and Mapping Airplane Engines ing; 1 Dream Book and Fortune , Metallurgy Navigation Book; 1 Base Ball Book, gives ules Steam Engineering Agriculture and Poultry Toy Maker Book; Language of I . CL} Radio Mathematics Telegraph Alphabet : 12 Chemical I Magic Age Table’ Great North | Name Conundrums: 3 Puzzles; 12 Games BUOERO . ..».cccccccsccccscccocsoosnccasnesnenstdnessscocsseesccooosseocosccsscocoseeseee eccecceedes Autograph Albums. Ail the above Street 10 cents, and 2 cents postage. ID cecennequssnsunmmincntnatesmnnpenieitennins a _ ROYAL SALES CO., Desk 936, Norwalk, Cou Occupation | SIGNS. BANNERS. CARDS , ; 7 h th id of Letter Patterns Persons residing im Canada should send this coupon to the Interna- ay, pentes pattern. Made in a large variety of » tional Correspondence Schools Canadian, Limited, Montreal, Canada, at surprisingly reasonable prices. Samples for st« * Joha F. Rahn, A2433 No. Greenview A

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POPULAR MECHANICS ADVERTISING SECTION and Garage Business Earn Up to*20,000 per Year $20 00 a year is a lot of money, men. But it 7s being made 9 in the Auto and Garage business. True, not every int birds, one makes it. But it’s ‘here—and you can go after it, neck and neck with ie the next fellow. Thousands of jobs and business opportunities in Auto- women." % motive lines are still open. That’s what I want to talk to you about. \ der k Bvery Only 8 Weeks to Complete the Tr You owe it to yourself to get into a business where you can push ahead fast. This is the business. Men leave our shops after 8 weeks of training ready to earn up to $125 per week. We get you a job—or show you how to start infor yourself onsmall capital. From there on it’s up to you how much you’ llearn. Where the Big Money Is Made One man trained here earned enough in 8 years toretire in comfort—at 40. Another Greer graduate started in business for himself 18 months ago with a capital of $400. His business is now worth $30,000. Another averages $400 to $500 per month and has only been estab- lished 8 months. You have the same opportunity, but you need Greer shop training. Over 47,000 men have been trained inthe big Greer Shops : —over 30,0000f these men are now in business for mph an _ ra = themselves. The others are in good jobs, earning a 0, ex~ : tir of cylin- far more than they ever earned before taking Greer GET TH iS ead. training. Your opportunity is HERE, too. Railroad Fare Allowed to Chicago The City of Automotive Opportunity There is room for thousands more trained men in the auto, garage, or accessory business. Right here in Chicago there are over 5,000 garages and repair shops. Within 10 blocks of the big Greer Shop Building there are over 40 Auto sales Agencies. Hundreds more throughout the city. Over 16,000,000 automobiles in the U.S. Plenty of work for trained men. Come to Chicago, men. i allow railroad fare to Chicago. Get my FREE BOOK. Learnall about it. Mail.the coupon. JOBS GUARANTEED Which Job Do You Want? Which job do you want? We train you for success in Automo- é bile, Truck and Tractor repairing —Shop Management— Selling Mr. - "ERWIN — Machine Shop— Automotive Electricity —Storage Batteries— ' s Tire Repairing —Vulcanizing— W elding—Driving—every auto, ' GREER shop and accessory job in the business. Take your choice of sub- r) ects. We guarantee toget you the job after we train you. Andif : oon need assistance we'll get you an earn-while-you-learn job 6 President building, containing while training. Mail the coupon and get my Special Offer in detail. Dept. ly devoted t Mail Coupon for Book and Offer ‘ 2024 S. Wabash ing ¢ ieeer Studente. i Take my word for it, men, this book will open your eyes to the * possibilities I hs ave onl Pd Avenue y ‘ er M a od CHICAGO, ILL. mobile f a it's FREE. -. Get it I er. 2 Ple ase send me FREE BOOK Addre anew heedbe wg Pd . S *‘How to Succeed in the Auto- ERWIN GREER, President. mobile and Tractor Business, and special training offer. This re * quest does not obligate me in any way. * * COLLEGE Automotive | ineering~ Tt 1201, 20248.WabashAv CHICAGO, Ill.

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POPULAR MECHANICS ADVERTISING SECTION Do Your Friend Marvel ®::. i. sa? rve Mar Most like ely they avy had enrolled ou we Send friends and re his popularity w about by the harvest y feaping of better healt pep and endurance; stre make you a leader, eve @ physique that would worship you and your you; joints and n:uscles supple your body w greatest possible agilir these, you would have three short months bedy und its needs; mor and physical culture in ever have in any past six in the same length of tim: in place of that yk one you now possess? How would it lo ok as go instead J flabby fa You can imagine how it would look, wi h upper arm is some br put it on there w ak,” “take the st . ng for 5 I hat | is ie get started. But just as iagertans t as starting—is the matter of stan, ing right. vou START RIGHT When You Send for My FREE oe d you nd right when you finish my course. The title of my booklet Road t He alth and Strength.” It has sixty-four pages, which are give of m yeelf an ‘di my pupils. It also gives a thorough explanatic ion of my ds as those of my musecle-contr . a hand-balancing and other, valuable ia —~ IMPORTANT tion soa oF peel eke ere My New Leaflet, “Your Muscles, the history of physical « — “ Where They Are and What They out a booklet worth mc Do,” will be sent with my Booklet - You need this be nd it is aleo free. Every person con templating physical culture should get CHARLES MAcMAHON hie Leaflet first. Then you will cally know what you ere doing, Get « Somerset St. oth ef them by return mail. ens Ay Philadelphia, Pa. rantee Electrical Eaiesese SFREE rraiminc cu Mail postcard for amazing FREE book on electricity. S! how to earn $150 to $600 a month in this immense field m +4 1 S & H shop-type training fits you quick at home for big ra ing iw Exclusive system, Lack of experience or education no bar. Writ | S&H neering W. Monroe $ t. $-1, C I If you're earning less than $75 a week, GO INTO DR AFTING! & 4 Eng Co, 1422 ee Rt, Bey teen, & I guarantee to train you AT HOME the “JOB-WAY"’—with Musical Comedies and actual Drafting Room Jobs. Drafting EXPERTS are close to Revues, with full in- the boss—are first in line of promotion for executive positions. : dour books, F Puli : You can stage your own ' wit of plays, stage songs, crossfi monologues eville ac d' make-up. CATALOGUE after $250 to $400 a Month! 7S, DENISON & CO.. 623$0.Wabash-Dept. 19 Chicags Common schooling all you need! My graduates are success- ful —employers ask for COYNE-trained Drafting EXPERTS. So I GUARANTEE satisfaction or to refund every penny you pay me. EXPERT’S DRAFTING OUTFIT THEN our VACuUI “JOB-WAY” training makes you a j Ss usec a lew ’ Drafting EXPERT quick. You do : unen Ly aaoot actual JOBS with the same instru- : a deo a, oR. I ments you use when employed at a " Siento Cap’ is = i OS RIGHT NOW T give you this od that draws the blood to t start RIG 8) give you this : . ( o complete E m San RT oueit FREE \ Roots and starts a nev P crop of hair. It stops D .) g t SS Coupon bring full information. % : stens the bair trom fal ‘ Bought by Doctors and men who know that it is t a 2 ° reasonable HAIR GROWER known to science N . , . Used Write for application blank, testimon booklet on “HAIR,” sent sealed in plain envelope, . S8eseeele pat 4 Thousands of big-salaried jobs all over the country looking for Draft- SS Sy fg EXPERTS! Railroads, tuc- THE MODERN VACUUM CAP CoO. tories, builders, architects, shipyards, aute planta, Citic 2, Counties, States C559 BARCLAY, DENVER, COLe. and the U.S. Government all calling y for Drafting EXPERTS! Mail the coupon to me personally! CHIEF DRAFTSMAN COYNE SCHOOL OF DRAFTING MAIL CARRIERS (CITY OR RURAL) Dept. 919, 1920 Sunnyside Ave., CHICAGO 4 , : * Without obligation, send me your book, “Drafting, the Foundation . $1400 to $2600 Year od ye y -* h of Industry,”" absolutely FREE. Also, special offer of FREE ’ Steady—commen educa wv yas Se me Instruments and other big FREE features. ; tion sufficient Big * ene Pa OUT CHA! chance for men,18 up. o*” Of places at w! H r eet ¢ ysitior oo a ™ Mail Coupon Carrier Tell me Today ed the position, and send free . — ination coachin: lesson > Sure ye Name.... AddrTess..ecees

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POPULAR MECHANICS ADVERTISING SECTION 81 Champions Are Not Born~ They Are Made | Make | Make Champs + Can Make You Be a Champ in Your Favorite Sport 28 Champions to my Credit—By Dr. P. M. Seixas it’s a proven fact that champions are made—neot born. Many of peey: A 8 famous athletes were forced to take up some form of outdoor sport for their health, because they were physical wrecks, and with proper handling soon developed into champs. You can be a champion in your favorite sport. I have perfected a system of mail training which permits anyone to realize his life's ambition f to be a champion. Athletes who have failed to meet the requirements of their home coach have come to me for aid—and needless to say, with my method of instruction they quickly improved and many of them broke records. i have the biggest list of champions to my credit of any coach in the world. Some of these champs at first seemed hopeless to themselves and others. Yet, after I took them in hand they became world beaters. Why? I'll tell you the reason. I don't try to change a man's natural style, or nag him about what net to do. I let him follow his own individual style and tell him what he sheuld do. Regardless of what athletic sport it is, I know how to get best results. Twenty-five years as an all-around trainer and coach has given me a wealth of information that I don't want to keep in storage for the few I want every Boy, Girl, Man or Woman in the world to get the benefit of my experience and quickly become a champion. My system mever fails. Ask Charles M. Daniels, champion swimmer; Tim Jordan, famous home-run hitter; Harry Babcock, world's champion AS pole vaulter; and a long list of others rhey will all tell you that they have “Doc Seixas’’ to thank for their medals and success. What I have done - others, I can do for you and I guarantee to do it. My system never fails! .pr.m.seixas | Will Make YouFit and Peppery Coach and Trainer ‘Coach in 28 Seocts SE I don’t just develop you 20 that you can have “ show-off" muscles. IT pep you u I n matic meth« trair " ure better able to daily work or i et you pick y t istrat lone of a few of pions in Besides these, thers In other words, f ite p you, y and heutvasion » Seizas System 0 : ee pictures and do exactly the DR. SEIXAS AT 50 1ould improve your form 100% addition, | send you my individua ur every move “ tive I that my system never fail pr behind every word I say with « on-clad guarantee The Road Write me telling what sport Mm 2. Career you are interested in and I will advise you personally, and send CHARLES Daurmte, World's Champion Swimmer, Mem- you a booklet describing your ber of Olympic Team h ‘. aoa Hamar V. Bascock, Captain Columbia University and needs and my system. Do it we orld’s C nampien “Pole Vaulter; Holder a Olympic now My system never fails. e Vault Record ? ven Mit SANE, Inter-collegiate Wrestling Cham- Just place an “X in the box Yale University indicating the sport you t -colle; jymn ec Cha jon, A y a op eg legiate Gymnaet? ham pion. want to improve yourself axp Stepuen McCuave, Prin m University in Rush coupon now be- ‘Holder for fore you forget High Hurdles ela Hanotp Frioman nter . core Ider 100 yards Pcon . P. MM. Seixas, 1 Faep J. Sutivan, Capts few York University Track Athietic Systems, Inc. Te cam and ( hamp ion High Hurdler Dept. 9114, 1920 Broadway, McKenzrs, Inter-collegiate ter-scholastic New York Half and Two Mile Champ - ; to Kiasy, Former Metropolitan Golf ampion Ww hout obligatior please W. Rocers, Inter-scholast rd I Shot Put Bookle we. Make amy and Member of Cornell Universit k Team am interested T. E.trmewoopn, Inter-scholast Hi and Miler, other sports, write and Member of New York b ( ) Baseball Ropert Junior Skating Ch ion, Pittsburgh, ( ) Basket tall , tteburgh Skating Clut ‘ ' erocer, Alleghany Mountain Speed Skating 2 - “p ~— . ( a Artuve Keens, Figure Skating ( mpion i. « Ww. FE niversity of Pennsylvania Swimming Member of w cae yan University, Football Athiet apta and Former Ce Athletsce Tim Joavax, Brooklyn's Home Run Hitter Han Dr. P. M. SEIXAS Name Seixas Athletic Systems, Inc.’ Dept. 9114, 1920 Broadway, New York mer

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POPULAR MECHANICS Tobacco Is Look at the facts square in the face, Mr. Tobacco User. tobacco is not hurting you. ADVERTISING SECTION urting You You may think That is because you haven’t as yet, perhaps, felt the effects of the nicotine poison in YOUR system. ing tobacco, is a slow working poison. Tobacco is lowering your efficiency. It slows amandown. Makes it harder for you to concentrate your mind on your work. You haven’t near the amount of ‘‘pep’’ and energy you would have if you stopped using it. There’s many a man twice as old as you in years who's twice as young in energy, simply because he lets tobacco alone. Some day you will realize to what an alarming extent tobacco has undermined your system. For you know that nicotine, as absorbed into the system through smoking and chew- Slow, yes—but sure. When your hands begin to tremble— and your appetite begins to fail— and your heart seems to “skip a beat” now and then— and slight exertion makes you short of breath— then you have a right to suspect that TOBACCO is getting the upper hand. Any well-informed doctor will tell you that these ar: only a few of many symptoms of tobacco poisoning And YOU know that the use of tobacco in any form is an expensive, utterly useless habit. You know 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 all craving for tobacco in any formin a very few days. long waiting for results. obacco Redeemer contains no habit-forming drugs of any kind and is marvelously quick, scientific and thoroughly reliable. It is in no sense a substitute for tobacco. or to continue the use of the remedy. nerves and make you feel better in every way. Asingle trial will convinee esu ts uarantee you. Our legal-binding, guarantee We will refund every cent you pay for the treatment if after taking it according to the easy-to-follow directions, it money - back goes with each full treatment. should fail to banish the tobacco habit completely. Let us send you our free booklet on Coupon for the deadly effects of tobacco, to- Free Proof gether with testimonial letters from men allover the country telling how they have been absolutely freed from the tobacco habit by this simple Tobacco Redeemer will free you from the habit than the evidence we will gladly home treatment. You could not ask for stronger proof that send op reguest. Just mail the coupon—or a postal will do. NEWELL PHARMACAL CO. Dept. 300 After finishing the treatment you have absolutely no desire to use tobacco again It helps to quiet the St. Louis, Not the slightest shock to the nervous system. Your tobacco craving will usually begin to decrease after the very first dose—there’s no ty “oh Free Bo kk Coupon NEWELL PHARMACAL CO. Dept. 300 St. Louis, Please send, without obligating me in * your free booklet revarding the tobacco ! proof that Tobacco Redeemer will positiv« from the tobacco habitor my money will be: r WA Name errr ee rrr BS BG FODe seccnannntnnemngn tans ee ee eT Mo. L Town......... seneions euleatenienitninmeeniiiaiia State

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POPULAR MECHANICS ADVERTISING SECTION 83 THESE BOOKS WILL HELP YOU GET A BETTER JOB Every one of the books listed below was written by an expert. They bring you the results of years of practical experience. They are, in every respect, the best and most helpful books of their kind ever written and are used by leading colleges, including Harvard, Yale, Cornell, Dartmouth, Purdue, Georgia School of Technology, Leland Stanford, etc. They contain much material that is not available in any other form— anywhere! New, com- plete, authoritative, and profusely illustrated, yet low in price. der them for yourself —Buy them for Christmas gifts Shop Practice Books —Lathe Work. 312 pages— 334 illustrations - - - $2.50 Drilling, Boring, Bench Work, Erecting. 385 pages 343 illustrations - - - auges, Jigs, Dies, Temper- ing, Heat Treatment. 347 pages—273 illustrations - Patternmaking. 420 pages 424 illustrations - - $—Foundry Work. 568 pages illustrations - - $4.00 Automobile Books t—Electric Starting and Lighting. 363 pages—180 ustrations e "—Electric Ignition. 245 pages illustrations - - $2.50 s—Automobile ‘Teancutecten, Mechanism, Lubrication, Tires 351 pages : Drafting Books §—Sheet Metal Pattern Draft- ing 654 begun illus- ° o $5.00 Mechanical Drafting. 504 f 442 illustrations - $4.50 $3.00 Pe BARGAIN MAM ~anonom 39—Radio Handbook, 455 pages 40—Business Man’s Handbook 41—Automobile Handbook, 347 pages wire 's Handbook, 302 43—Building “Trades Hand- ook, 409 pages 44—Chemistry Handbook, 348 pages 45—Civil Engineer’s Handbook, 411 pages 46—Concrete Engineer’s Hand- book, 368 pages 47—Machine Shop Handbook, 346 pages 48—Mechanic’s Handbook, 25—Money and Banking - $3.00 26—Business Law. 300 pages $2.50 27—tTraffic Management. 310 pages—166 illustrations - $4.00 28—How to Sell Your Services. Foreword by B. C. Forbes. $1.00 Electrical Books 29—Electricity and Magne- tism. 387 pages—309 illus- trations - - 30—Electric Railways. 332 pages—287 illustrations - $3.00 $1—Alternating Currents. 338 pages—253 illustrations - $3.50 How to Prepare for Civil Service Examinations 32—Civil Service Spelling, Penmanship, Reading Ad- dresses, Letter Writing, etc. 349 pages - 3 33—Civil Service Short- hand and Typewriting—Spee Short-hand. 339 pages 90.50 34—Civil Service Geography, Bookkeeping, Copying, Manuscript. 332 pages - $3.00 Pharmacy a and Materia ta Medica. te Board Ques- tioms. 326 pages - - - 330 pages 49—Pharmacist’s Handbook, ~~ Drafting. 442 $4.00 346 pages >—357 illustrations - Building Trades Books -Heating and Ventilation. 313 pages—108 illustrations $3.00 Brickwork, Terra - cotta, Hollow Tile, Building Stone, Plastering. 437 pages—346 illustrations - $4.50 4—Estimating Buildin Costs, Specification ane Contract Writing. 344 -38 illustrations eometrical Drawing, Ornamental Drawing, Architectural, Freehand and Perspective Drawing. 512 pages—245 illustrations $5.00 Reading Architects’ Blue Prints. (Ten blue prints 618 page -478 illus- r - $5.00 Steel i Square--Hew to Use 36—Inorganic Chemistry for harmacy Students. 381 50—Poultryman’s , — ao pages—69 illustrations - - 51—Plumber’s Handboo ions Lettering Books _ 37—How to Design and Make = = co putes, Se Cards. 309 53 pages—254 illustrations - Electrical Handbook, 38—Artistic Alphabets for Show Cards and Signs. 338 pages—272 illustrations $3.50 PLEASE ORDER BY NUMBER Mail check, money order or stamps with coupon $3.00 $3.50 Business Books 22—Salesmanship. 369 pages ayn 23—Advertising. 497 pages ne 24—Good English. 442 pages 33:00 eee aes: =! INTERNATIONAL TEXTBOOK COMPANY, Box 5664-D, Scranton, Penna. I am enclosing [] check money order (_] stamps, for which please send me the following books - 2-2 = = = = $1.50 (Write the numbers above) It is understood that if I am not satisfied with these books, them in five days and you will refund my money Pte tering and Stucco I may return and Fancy Brick- ; $1.50 llow Tile ‘Geentrustion _ and Stucco Finish - - $1.50 2l~—Plain and Reinforced Con- crete Construction - - $1.50 Name Address —_——_—S =

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POPULAR MECHANICS ADVERTISING SECTION I say to you—stop plodding! Get into work you like and earn big money. If you are mechan- ically inclined I can train you in twelve weeks for a cre that’s the thing to do 312 Auto Building Detroit, Michig i

THE STUDEBAKER ¢ CORPORATION

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POPULAR MECHANICS ADVERTISING SECTION 10.000 A YEAR yd ee Ae 8 f15.000.000 Automobiles in U.S. Get into THIS BIG MONEY BUSINESS ee al n the lead of thousands of “ Michigan State” graduates who have to be repaired. ntage of the amazing money-making possibilities in the automobile, | 15000000 Batteries, ractor business. Be a garage foreman, or an auto electrician, skilled 15,000,000 Ignition n, tire man, welder or machinist. These are the men who get the Syst n, . ems and only ] Detroit trained men are in demand. Here is a chart of facts figures which point out the opportunities. Here’s vour chance to 50,000 Garages.| satisfy your highest ambitions. rtunities are greater now than ever. There are more autos, more trucks, more tractors vear adds to the money-making possibilities. You have ambition—you want success. ertain if you are willing to work for it, and start with proper training here at Detroit, the We have graduates who have made as high as $10,000 in less than a year. These seem amazing, but they are true. It is all done through head and hand training at the State.”’ Decide now to give yourself the training that will pay you big and start you ina EARN WHILE YOU LEARN successful life work. If necessary we can assist students to secure GOOD POSITIONS OPEN art time work to earn a small amount each si eek. Or students who wish to take our eve- The demand for men who know auto mechanics ning course will be assisted to full time day jobs and electrics is greater than the supply. Step into Ask for details, and when writing any live-wire garage—everybody is busy as bees, pl ise explain your circumstances have more work than they can do Men working fully, and your age, nationalit overtime, all at extra pay. That means big money height and weight. for repairmen and boss These money-making tunities can be yours too, with Michigan g. The training in Business Manage- nd Salesmanship included in our courses nakes our graduates especially valuable The years ahead are predicted to be the biggest years of the industry hat means certain money-making advantages to men who start in the business now Home Study Course FREE You can start your course here any day on the train for Detroit now Or if you cai at once you can begin to learn at home by Home Study Method, then come here later to No extra charge for the Home Study tr Write me for full information. Or use the cou This is your opportunity to get ahead. Act n Mail the Coupon Today Get all the interesting facts. Mail the coupon for information concerning your future that you must not failtoget. It'sillustrated with photos of school equipment and graduates. It tells you how you can get a good paying job—how you can go into business for yourself with little cap- ital Mail the coupon or send us a postcard today Write now (We do not enroll colored students, « xcept on our Home Study Course.) PRACTICE ON MANY FINE CARS zz & a arn on up-to-date, new equipment. All types of cars, transmissions, electrical systems Some of the new cars 4 a that you will find in our equipment are the new Pac kard al Oouw 77 t with four-wheel brakes, Packard Twin Six, new Buick eel brakes, Oal r ee es ‘ Light, + ait H wh me 8 eee Se “ ure ‘‘r fae —— ent, Michigan State Automobile School 32/205" wits ny others. Send me I REE and without obligation complete infor- t on about Detroit-training to make the most money 3729 Woodward Avenue, Detroit, Michigan a: State Resident Course at your interested If interested in Home Study Course

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86 POPULAR MECHANICS ADVERTISING SECTION ELECTRICITY S ocateeaenaianaaiae imate If I Send You These New Books ay oe you look them over for a week at my risk— give them a chance to show you how a few min- utes a day devoted to ae them will answer your problems—help you with your daily work—raise your pay—and put you in line a a bigger job? Prove their value—then decide if you want to keep them. Teach Yourself at Home These books contain every important up-to- the-minute fact about Electricity in all its branches. They’re packed with new, sound, commonsense, how-to-do-it information, written by prac- tical experts. Easy to read—easy to learn and apply. No need to take a long, expensive course of training—these books con- tain every thing you need to know to get and hold the best jobs. Common school education is all you need to master Electricity with these books. Order a set today for free examination. Learn These Vital Points Theory and Practice of Electricity—Principles of A. C. and D.C. current. Electric machinery—Dynamo and Motor Design— Measuring and Testing Instruments — Wiring — Convertors— ectifiers — Underwriters’ Requirements— Electrical Estimat- ing — Switchboards—Electric Railways, etc. Ready-Reference indexed for quickly locating any subject. Electrical Engineering complete in eight big volumes—4,100 3,300 pictures, charts, diagrams, blue-prints, etc. yes, Fisxible binding. Gold stamped. > SEND NO MONEY! _ Just the coupon. Look the books over a full week with our compliments—then decide. Noobligation to buy unless youare satisfied and want to keep them. Send coupon now —today and get this mas- ter electrical set. Pay only $3.00 monthly if you decide to keep it. AMERICAN TECHNICAL SOCIETY Dept. E. 919 Chicago, U. S. » . American Topintcat Society, Dept. £. 919 . uv. Please Bie me t ae aa cyclopedia of ELECTRICAL ENGI- NEERING Ser (ree examination If satisfa ctory I willsend you $2.80 within 7 days, and $5.00 m wnthly for nine months 1 Nam ' t address : ‘ 4 Employed by ———E — = SE i EE ——— Blu-Flash Gems Latest wonderful discovery blue-white brilliancy quer years that positively matches genuine D) monds gee by side. Same perfect cut. same dazri reinbow fire. Noted experts positively need their expe to detect any difference all. ~y ~ the “Diam yew admire on your friends are Mexic: Btu- Flash Geins Test one tree. “You risk nothing de by side with genuine diamond If yo see any difference send it back for quick, cheerful refu nd. To get new customers and agents we offer these price which are all you pay and just half our catalog prices 4—Gent's “wy | y " t , Diack ir lay on | sides, 1 7/8 ct. ist Water $4.98 y’s fancy box setting, three 1/2 ct. A-1 Mex. Blu Flash C Gems, finest Platino finish ; 5.88 No. day's Solitaire, 1 ct. ist Water Mex. Blu-Fis Gem, ¢ engraved Platino finish 3.88 Me. 7A ame but ae old f., plain or engraved 249 Mo. $—Gent's finest | f heavy engraved tooth Belcher Let. ist Water Mex. ~ -Flash Gem 3.98 oo m FE | SEND NO MONEY: just name. ad- dress and slip of paper meeting WEA eround ay ng for size. State which ring wanted We ohi prom On arrival deposit price with post- man f you dec tae * ae ke oD. —— n 3 days and we MEXICAN GEM IMPORTING CO. DepiP.2. Mesilla Park, N. Mex Importers of Fine Gems ‘or over 19 years Try THIS on YOUR Hair 15 Days Let Your Mirror Prove Results — [~ 7 OUR hair need not thin out, nor need you had > become bald, for there is a way to destroy ¥ — the microbe that destroys the hair. This different method wil! stop thinning out of the hair, lifeless hair, remove dandruff ie darken gray hair and threatened or increasing baldness, by str‘ ening and prolonging life of the hair for men and women FREE TRIAL OFFER: S20 20%5 2rritt f AYMES CO., 3932 N. Rebey: St., $-234, Chicago, lll. No Joke To Be Deaf — Every Deaf Person Knows That Imake myself hear, after being deaf for with my Artificial Ear Drums. I wear t and night. They are perfectly comfort one sees them. They stop head-noises and I will tell you a true story, how | bec and how I make you hear. Address GEO. P. WAY, Artificial Ear Drum Co Ine 80 Hoffman Bidg., 2539 Woodward Ave.. Dr DON’T WEARS A TRUSS BE COMFORTABLE— Wear the Brooks Appliance, the modern scientific invention which Ey” rupture sufferers immediate re- It has no obnoxious sprin pads, Automatic Air py ty he ged Gee Soquther oe eespen | — o salves or plasters. Durable ea " Sent on trial to prove its worth. ) a MR. C. E. BROOKS ware of imitations. — for trade-mark bearing port and signature of C Brooks which appears on / Appliance. 'None cen. genuine. Full information J booklet sent free in plain, sealed envelope. BROOKS APPLIANCE CO., 215-A State St., Marshall, Micil. a - 9 4

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In Mich POPULAR MECHANICS ADVERTISING SECTION 87 ow New Method Makes Cartooning stonishingly Easy to Learn ~~ Cartoonists earn from $50 to over $250 a week! Why don’t you make big money in cartooning when new method makes it so easy to learn—at home in spare time? iid make cartoons, can now earn big money in this fascinating field. Right at _~s home in your spare time, you can now @~@#@ Tei make who never dreamed they easily learn to make all kinds of cartoons —co! sport, political, human interest and animated. You can now earn some of the big money paid for cartoons of every description. nd cartooning does pay enormous money! Briggs, Bud Fisher, Fontaine Fox, George MeManus, Sid Smith and all the other head- liner more than the President. A single eart dea can easily mean a splendid life- g ir you. The World’s Easiest, whet Pleasantest and Best _ | Students Say: ° e T am now, poking for maysoll d find « ean dc find no Paying Profession Jy Se neighborhood of $250 a week. I have my own syndicate and - i c t H ould money be earned more al a good fel ae p A few hours a day at work RP. —Lawnence, Mass. that enjoyable as play—and there Pree Employment r ) limit to the money that can Bureau be f ! I want to thank you for : e the personal interest you fore have the opportunities in have taken in me while receiving instruction from your school and for re- r been so many or so varied. ferring me to thie there been such a splendid m Mw ehance urn big money for cartoons. F. M.—Memrnis, Tenn, And 1 lless of what you are $125 aMonth Spare doing at present or how poorly you — draw v, you can easily and coe © ee SS poe tunity to recommend your school. I have been doing a great deal of commercial work— making on the average of $125 a SS 4 month in spare time T. W. P.—Cuanvorre, N. C. Earn While Learning In two weeks I earned more than I / for the entire course. I am irn to make cartoons s new easy method, New Easy Way to Learn Cartooning Tt its 1 more than pleased with the training IT received and am certain no one can fail to make rapid progress w your instruction, 1 , QO. B.—Otv Town, Ma. learning to make car- to, s new way. it’s just lke for you to learn. Read about our students, how repel y : “bere A wy ~~ they make money while learning, and big salaries g ou learn at home, yet it is just after they graduate. Our handsomely illus- —y nstructor stood at your elbow. trated booklet is crammed full of interesting facts } t need to know a thing about on Cartooning and describes in detail this remark zg. You start with straight lines and curves. Then able method of teaching cartooning. It will be sent to you the little secrets of originating cartoon ideas, the without obligation. Mail the coupon for this booklet nou t exaggeration, of action and expression—all the little ° H iake cartooning amazingly easy to those who know Washington School of Cartooning (nd soon you are making real cartoons. Many of our Room 3012B, 1113-15th St., N. W., Washington, D. C. id cartoons published before they were half thru their SSLHESSSSSSSSSSSSSSSSSSSSSSSEEESSHEHEESESREEEEEEE ECE Ree eee eee WASHINGTON SCHOOL OF CARTOONING, Room 30128, 1113-15th St., N. W., Washington, D. C. earning to make cartoons is so easy, why shouldn't Please send me, without obligation, your Free Booklet on Car ike big money and enjoy the fun of cartooning. peo. +» Hy and full dets alle on ome WRITE. ppmett ae emee tes of this school are to be found in every section of the Read in the panel what they are doing and what they oa this training. Name (State whether Mr., Miss or Mrs.) Mail Coupon for Free Book Address mi sen iore about the wonderful opportunities for making a State soney in Cortooning and how this new method makes it easy (If under 16, please give age )

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PINTERIOR WALL DECORATION lain and De ative Fir snes ediaaiacbnasamaehs

The first Authoritative Book on Interior Wall Decoration Containing Complete Instructions for Producing the New and Unusual WALL FINISHES Very little is known of the methods used in produc- ing the new decorative wall finishes. Yet because of their beauty the demand for information comes from every side. This new book, “Interior Wall Decoration,” by one of America’s leading authorities, F. N. VANDERWALKER, is pro fusely illustrated, with photographs of walls finished by the most able decorators of the country. Not only is the result shown, but the process by which it is obtained is minutely described, and also the tools and materials needed A few items taken from the table of contents are: Color Stippling; Glaze Colors, Tiffany Blending and Mottling; Spatter Work; Plaster Staining; Sand-Float ; Sponge Stipple; Spanish Palm Finish; Roman Travertine; Old Eng- lish; Holland; French Caen Stone; Italian Plaster and Other Artistic Rough Textures; Decorative Wall Panels. In addi- tion, plain painting jobs, calcimining methods, preparing sur- faces and hanging wall fabrics are completely covered. 450 pages packed full of information, bound in handsome leatherette. Price $4.00. We prepay postage. Send in the coupon today. After five days, if you are not completely satisfied, your money will be promptly returned. Drake’s Painting Books

Art of Sign Pa . oo \ mot Scene Painting and Bullet Modern Pa Ast ce 4.00 Estimates. ( “A Show at” S ( is 4.00 House Pain Art of Show Ca i Writing 4.00 terior Dec Signist’s B« Modern New Hardw Alphabets. -- £80 The Amateur t Strong’s Book of Designs 4.00 The Mixing of Colors and New Stencilsand Their Use 1.28 eee 2.00 Any of the above books sent, all charges prepaid, on receipt of price—money back if not satisfied. Mail this coupon today FREDERICK J. DRAKE & CO. , Publishers 1008 S. Michigan Ave. Chicago, i. F. J. DRAKE & CO., Publishers var 1008 S. Michigan Ave., CHICAGO, ILL. Please send me “Interior Wall Decoration" by F. N. Vander- walker. I enclose $4.00. You are to mail the book postpaid and refund my money in full if I decide not to keep it NUN «<a kbadouituud einai eke mnded ce be ieatuneaed My address is SHCKSCCE CERES ESET eee eee ee Rensosuinanenansbinedmanbetinsadll

POPULAR MECHANICS ADVERTISING SECTIOY FREE to the DEAF 10 Days Trial of the World Famous Acousticon Every one who fs troubled with deafness is now invited to en- joy Ten Days of Good Hearing with the world-famous Acous- ticon. Let us send you our latest improved model for 10 days free use entirely at our risk and ex- pense. No deposit required—no obligation on your part. Just try it—10 days Free and let results convince you. Mr. A. H. Herrick, of Harvard University, says: *‘We who suffer from impaired hearing have cause for profound gratitude to you.’’ ev.G M. Rainey, the Evangelist, says. ‘‘The results have been all you claim.’’ Mr. A. ollander, of the Equitable Life, New York, says: ‘‘Not a day asses but what I recommend the Acousticon to riends or business acquaintances—it has made a new man of me.’’ In like manner write thousands of others, expressing their gratitude—men and women in every state, in practically every civ ized country on earth. Yet we don’t ask you to lieve. We simply ask that you allow us to prove the merits of the Acousticon in your own case, to your own complete satisfaction without a penny of expense or risk on your part. Just try it—free, that’s all we ask. Send name and address today Dictograpl: Products Corporation 1307 Candler Bldg., 220 W. 42nd St., New York RAISE BELGIAN HARES NEW ZEALAND REDS—Chinchillas—Fiemish Glants MAKE BIG MONEY—We supply etock and pay ‘you New Veale prices for elt zee raise elgian Har bh N nds $3 each—Chinchillas $4 eac! Fl ‘ Glante $5 each. 82-page illustrated book, catalog ar act, alse copy of Fur Fe i! magazine, tella how to r skunk mink, fox, etc., for big profits, all for 1% A OUTDOOR ENTERPRISE CO., Bov25. Holmes Park, Mo. New Kind of Truss No more steel springs, weighty cushions, or chafing | Amazing new kind of support, weighing less than 1 } ounce, prevents coming out of rupture, which leads to en to strangulation— yet requires no tight strapping lib id- fashioned ineffective devices. Offered to ruptured p« na guarantee of instant satisfaction or no cost. Free di will simply drop us a post-card or letter with your NEW SCIENCE INSTITUTE, 2107 Clay Street, Steubenville, Ohic

Improve Your Nose Quickly and Easily Trados Model No. 25. lat proved nose shaper, U.S.ar 1} Patents, corrects now ill noses quickly painlessly ar fortably at home (excepting caused by an impreper bone st ture). It is a superior, safe guaranteed device that will a give you a better lookil 87,000 satisfied users recommended by_ physicians years’ experience in manuf nose shapers is at your serv Write for Free B t M. TRILETY, Specialist Dept. 2194, Binghamton N.Y

Model No. 25 Junior for children

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POPULAR MECHANICS ADVERTISING SECTION 89 ratorybp oF

“4

You learn tn my schools with tools, instruments } and malte- So I give you thts $50 out- absolutely free. Mail coupon for

— >

riais, not my free outfit wtth books, er. f train you on actual Dental Laboratory jobs how My schools at Chi ag 0 and Detroit are the make Crowns, Plates, Bridges,etc. for Dentists. largest aud most completely equipped Dental Vine is the only school of its kind with practice Laboratory schools. And my graduates are the ing, ethical Dentist in connection. most successful. LOOK HERE! What’s the use of crowding intc the Open a Laboratory Little capital needed when you are arrie-trained in every branch of Me-

or wdec ades? “‘Mechanical Den- al Dentistry. Big demand from No classes at my schools — pare yyy Sa Coa ~ =e 60,000 Dentists for — ee Indtcidual, personal instruction methods and offers you tempting salaries — hee Spasthaint Casini anpeveanition guaranteed to every student. and unlimited opportunities as soon as you ; — o hn - oan’ Gaon for Start any time. Day or are expert. No educational requirements, ES Laboratories. My training includes Labora- evening instruction. Fas: inating mec hanic al profession for men tory management, how to get business, how and women. J will help you earn as you Slants to take care of it, etc. learn. Takes only a few months. ay you slants also =| Earn $65 to $125 a Week! gs When you are a McCarrie-trained Dental Laboratory Expert, capable of traps doing every branch of Mechanical Dentistry, the positions and the oppor- ' tunit ies LOOK FOR YOU! Whether you work for one or several Dentists 1 a Dental Laboratory, my training will bring you tfop pay and that’s bigger pay than : - u can get in other lines of work! Mail Coupon for Valuable Book $80 Scholarship FREE " if you write me at once! I will pay your R. R. fare to Chicagoor Detroit and give you other valuable inducements to

ly Get my big free book quick! It tells you all about the great Dental Laboratory business and how with my training you can find suc- become a Dental Laboratory Expert. I will help 4 ecm gen aya é nd independence. It brings you com- you — your way’ an pry ag if pens . arate Boney nfi ; ~ , sary ut you must act quicRiy e number o every branch of information about my schools, my students I can train is of course limited, and you Dental Laboratory wonderful free offers to induce ambitious must write me immediately work. I will train n ind women to go into the profitable, to get ~ benefit of these i you ore gi business. Realize your hopes and Special Offer of earning big pay?

al itions in Mechanical Dentistry—mail “=. ——————<«." SSst bon or write today! McCARRIE SCHOOLS OF MECHANICAL DENTISTRY H. A. McCARRIE, Director 1338 S. Michigan Ave., Dep!. 1601-1, Chicago Please rush complete information and all free offers.

«| | McCARRIE SCHOOLS of a aol MECHANICAL DENTISTRY Bipsas rinsed otnpaaeiseddiodinscieesnaaa cll ue —e anes : AddTESS cecccccccccccceccccceeesescesseeeeees PTTTITI TTT Tt .

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POBULAR MECHANICS ADVERTISING SECTION Will you dive me 6 MONTHS / to increase YourPays Your name on the coupon means ¥. What I Give You No, Iam not a wizard. I don’t claim to have a “‘corner’”’ on succ« Free Book. Send in the coupon here’s a fact. | immediate 13 gone For fourteen years I have been helping men just like you to make more money, 1 o 0 OOK a rd ot a fo > re - - 7 stein Draftsman, able to hold your place among the beginning you can feel yourself kir will furnish yoy with a full set of / ; € you can your making first class drawjng equipment and highest paid Draftsmen in the land. the kind of progress that makes you cor Drafting instruments, as shown in PROMOTION IS QUICK yourself and sure of your success. the picture below, when you en- We'll qualify you for a high salaried position YOU NEED NO PREVIOUS TRAININ« roll. You keep both sets on com- in the Drafting field and keep you in touch with oe : pleting the course. — openings for Draftsmen in the big machine shops, rhis course of mine is easy to under Consultation Privileges. You industrial plants and United States Government ©48Y to follow. It is designed for mer are free to write me at any time departments. Men who start as Draftsmen are have the best and who must get the for personal advice and sugges- often advanced to Chief Draftsmen, Chief En- ‘28 quickly, so as to be able to make n tions regarding your progress gineers, Production Managers, and soon. Many #8 800 as possible. Many of my stu Diploma. The diploma I will of my graduates are today holding such positions QU@lified, even before they complete the give you on completing the course as a result of my help. These positions pay big Many a man has increased his pay so s attests to your proficiency as ¢ money and lead on to executive positions of the C®rolling that his course has actually ey em It is an entering highest type Thousands of men have found nothing wedge to success Drafting to be the stepping stone to some of the ICCESS Cc © : . NT —- Regarding Government biggest positions in American industry ae CALLS MEN OF ACTION ONLY ositions. The following are a oT * . . "aes you are a man of action—if you few of the many positions open in GET THE RIGHT TRAINING y cess bad enough to reach out and gral the Government Departments I started this school years ago Today it isa the coupon now and show me that you aré from time to time The salaries solidly established nationally known institution, of action Keep right on top of this opp are starting salaries, subject to with graduates all over the world. Istand per- to make real money. Don't go look increase sonally in back of the Columbia School of pair of scissors, tear the coupon off ar Architectural Designer $4,000 Drafting and back of every promise, every state- right away. Get started now. a year Ghict Drafteman. Xwal Ares | ECQLUMBIA SCHOOL OF DRAFTING Bervice |X: av x ‘Departins ok = ROY c. CLAFLIN, F r esident We will advise you as to other Dept. G-106, 14th & T Sts., N. W., fume | OPenings from time | WASHINGTON, D. Cc. FSSSSSSSSSSSTTKSSSSESSSSESE KEES EEE EERE RESEE TESTER EERE REESE eee EEE, FREE BOOK COUPON COLUMBIA SCHOOL OF DRAFTING Dept. G-106, 14th and T Sts., N. W., Washington, D. C. Please send me without charge your free illustrated book on Drafting, telling me how I can secure your help in securing a position as Draftsman. Aiso enter my name for free subscription to The Compass.

Name FREE DRAFTING OUTFIT We give you free with our course this professional Drafting outfit It is yours to keep when you complete the course.

4ECRERERCHRERESESR GEESE Cees

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POPULAR MECHANICS ADVERTISING SECTION Auto Experts earn°60to*200a week ng such var efund You I Guarantee to make You a Big Pay Auto Expert —Get You a Job and a Big Raise in Pay! SAY Good-by to $20, $30, or $40 aweek. Go afterthe Big Money! Work short, easy hours—boss the job instead of being bossed— : be independent—a Success! I’ll show you how: Listen! Give me a little spare time each day—Ill guarantee to make you a Big Pay Auto Expert—get you a joband at least 5090 raise in pay! Mail the coupon today for my amazing guaranteed job and salary offer. I Train You at Home by Actual Shop Methods My new SHOP-NOTE method of instruction gives you the full benefits of actual shop and garage experience, right in your own home — and with better results, quicker results! No need to quit your job until you’re ready for a Big one! My training fits you to hold a dozen different auto jobs. I make you a MASTER of auto, truck and tractor. I make you a full-fledged EXPERT — not just a mechanic. I’ve been in the Auto business for 24 years — worked for Packard, Rolls Royce, Paige and others. I know how to train you and I guarantee your success. Students Make Good! Education Un: RR Crewey, of M Va., on I don’t care what Education finished the Sth ieee yet — or Experience you have had. training doubled his in 5 months. Cari F. High of Madison, Wis., is at the of his own usiness. B A Ocoboc, 2220 Cam lhAve., De- trolt, was advanced to Chief Engineer. I could cite coven et similar cases | space permitted the int this Woat! AA Te: bundreds like toem § can do for you. Take my ry - your pick of a dozen big-pay —_ qualify you for and Tractor repairing- Auto Electricity- Vulcan -- Welding-- Battery W ork--A tion Motor Service--AutoSales- man -- Shop, Garage and Service Station everything. In B tart I will show you how to start in a busin ‘of own and take Crewey only finished the 8th grade and I doubled his salary in five months! My shop methods are guar- anteed simple, easy-to-learn, and easy toapply. I've taken men and boys from all walks of life and made them experts. Results Guaranteed Write today. Get my free book, fill- in $5000 to $1 profitsayear. ed with proof of everything I say. I aE how to organize, Get my guarantee to make youa adv and manage the busi- pay Auto Expert--get you a job ness, how to customers atleast a 50 percent raise in pay. Write ay. Get the These are money-back IW facts--the full FI not idle talk! WRIT » TODAY! Auto Book Sent Free Investigate! Write today. Get this wonderful book. Ir tells about big salaries, tunities, and my guarantee of big jobs and © pay. You owe it to yourself to read this fecha obligations. It’s FREE! Write Today! Big Outfit of Tools! Enroll now and receive this valuable outfit of fine tools and precision instruments. Start Name. . ms ih be at lest enrolled- not \ ase the Entire The American School, just like the best resident schools and colleges is chartered strictly as an educational institution and not as a money-mak- ing enterprise. This insures your get- ting the best Automotive Training at e lowest possible cost. 27 years repu- tation for integrity and square dealing plus a million dollars in resources stand back of the American School and its guarantees to you! 4 Mail this Coupons” Today! 7 TOM C 7 mulnnd 4 Chief Engineer Auto Division " American Schoo} Orexe! Ave.& S8th st. . . A-974 Chicago, Ilinois Send me your free book, your and salary gusrantee and full information on how you will get me « Big Pay Auto Job. This request is to put me under no obligation. cough spare time anto e . Ke congpiaty stoma TOMC. PLUMRIDGE, ChiefEngineer | / Address Drexe! & 58th St., Dept.a-974 Chicago, ill. S

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POPULAR MECHANICS ADVERTISING SECTION ainting “I Would Not Part With It for $10,000” ) d ear labor. no youns to attend. Start snail, gr wow tie. Sts _ Read how our customers sel! squabs for $12 0 t ; ivi be blished for 24 Be —~ with your living st gtablined for 24 Yours. Better logy ints OTELS, restaurants, clubs, apartments, everywhere need telling Kew to exbe Mocay breading squste ri L LS, nts, . 9 trained men and women—salaries to start up to $3500 a Plymouth RockSquab Co.,634 H.St., Melrose Highlands es , year by 3 oour living. Over 70,000 high-class pesstions paying up to $10,000 a year are open every year in the hotels o (Dp, , the United States Today this is the lst INDUSTRY IN | Be, Gp be Pee Meleiags Houses AMERICA—with over $992, 394.968 in new hotels being built | Allstyles, A70 eestrations; cocset of putting winter « egs in 1924—exceeding by $200,000,000 the next largest industry and copy of “The Fu Send 25 cents. These new hotels, restaurants, etc., will need over 60,000 trained POULTRY JOURNAL, Dem Dept. 7 Indianapolis, Ine men and women You can have one of these high-class big-pay positions, with luxurious meals and apartment and fascinating work. No previous exper! “ ence necessary The Lewis Schools guarantee to give you the valuable knowledge that it has taken some of the mont guce rr hota men years to obtain—men who are now making $5,000 to We train you by mail in your eoere fret home ‘with the Lewle rie Stmolifer Sindy Plan, ae put you in touch w opportunities r students employed, our met 3 endorsed by leading hotel men everywhere. ASK YOUR BARBER OR DRUGGIST Send today for Free Book, “YOUR BIG OPPORTUNITY,"’ showing how we can train you for one of these splendid positions in 20 weeks or less, and ex- Millions of men, women and children h ave plaining our Money-Ba ; ck Guarantee. ; found the secret of hair-health in “Lucky LEWIS HOTEL TRAIN wes SCHOOLS a=“, Tiger”’—the world’s greatest remedy SSMIENGCON, 1. Wo am falling hair. dandruff and all scalp disorder LEWIS HOTEL TRAINING SCHOOLS, Room A-388, WASHINGTON, D. C. A single application stops that mis Send me without obligation the Free Book, ‘*‘ YOUR BIG OPPORTUNITY."’ ableitching. Always sold und , AS YER positive Money-Back Guarante: ame eee e e ° ee ] f

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POPULAR MECHANICS ADVERTISING SECTION $90 Drafting Course Free Mail the Free Coupon Below There is such an urgent demand for practical, trained Draftsmen that lam making this special offer to deserving, ambitious men. You get your course FREE for getting two additional students. I will teach you to become a Draftsman and until you are drawing a salary of $250.00 a month. You need not pay me for my personal instruction or for the complete set of instruments. Starting salary according to my agreement and guarantee.Drafts- $250a Mont men’s work is pleasant and profitable. Positions are ire open paying 600.00 a year in the They are open RR Thousands of men are needed who have just the kind of training I will give you. You can get this training during spare time in your own home. Earn While Learning You can be earning a handsome in- come while learr.ing at home. This is a special offer 1am making. Absolutely no obligations of any kind in sending coupon. But you must write at once, as I limit the number of my students. Mail the FREE Coupon * at once book—‘*Successfal Draftemanship, ’’ also 4, -| open pesitions and for ty oy pa good y at once while learning at aty This offer to benefit thereby — act at ence. Chief Draftsman Engineers Equipment Co. 1951 Lawrence Ave., Chief Draftsman Will Train You aad on practical Drafting- room work Until you are competent and Until you are ina a moron posi- tion at asa aying at least $250 per monte This 4 an exceptional opportunity for a few selected ambitious men, be- tween the ages of 16 and 50 whom I will train personally. I Guarantee To instruct you until competent and in a permanent paying position at a regular Draftsman’s salary of at least $250 per month and guarantee to furnish you free complete Draftsman’s Working Outfit at once from the start. Free Drawing Instruments Free Drawing Table These are the regular working instruments and the kind of table I use myself. I give them free to you if you enroll at once. Send the Free Coupon T Engineers Equipment Co. 1951 LawrenceAve. Div. 93-59 Chicago Without any obligation to me mail your book, Successful manshi id full —— of y liberal “ struction” offer to a few students. It is understood I am obligated in no way whatever, ' 93

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94 POPULAR MECHANICS ADVERTISING SECTION Become an Expert Accountant The profession that pays big incomes The demand for skilled accountants—men who really know their business —is unceasing. Big cor- porations are in constant need of expert counsel in matters relating to Auditing, Cost Accounting, Business Law, Organization, Management, Finance. Men who can prove their qualifications in this important branch of business are structors—legal staff, organization and manage. ment specialists; business efficiency engine >rs including 31 Certified Public Accountants. Preliminary knowledge of bookkeeping is unnec- essary. You willbe giver whatever training, in- struction or review on the subject of bookkeeping rapidly promoted to responsible ex- ecutive positions— given an oppor- tunity to earn real salaries. The range is from $3,000 to $10,000 a year—even to higher income-figures, COSTS Train at Home Under the LaSalle Problem Method Why let the other fellow walk away with the better job, when right in your own home you can equip ane f fora splendid uture in this _ able profession Under the LaSalle Problem Method you APPROPRIATIONS POLICIES you may personally need—and with- out any extra expense to you. Our big free book on the accountancy profession fully explains how we train you from the ground up, ac- cording to your individual needs, from the simplest bookkeeping _ princi- ples to the most ad- vanced accounting problems. Al! text material supplied ir the course has bee: especially prepared in clear, easy-to-under- stand language, so that you can readily master the principles by home study. If you are dissatis fied with your present | PROFITS can acquire a thoro understanding of Higher Accountancy, master its fundamen- ° tal principles, become expert in the prac- PLANS FOR FINANCING equipment—if you recognize the op; tunities that lie ahead of you thru hor study training—you will do well to se: tical application of those principles—this without losing an hour from work or a dollar of pay. Your training will be under the direct supervision of William B. Castenholz, A. M., C. P. A., former comptroller and instructor, University of Illinois, member of American Institute of Accountants, and at once for full particulars. The coupon will bring you an inspiring story Years’ Promotion in One’’—of how one man, thru stud home, cleared the path to success; also the true facts present-day opportunities in Accounting, all without tion. Our convenient-payment plan places these oppor ties within the reach of everyone. The man in earnest to get ahead will find the coupon below this text his most profitable aid to progress but a moment to fill it out and sign and mail it—and t! to START toward greater things is NOW. LASALLE EXTENSION UNIVERSITY The World’s Largest Business Training Institution ee ee ee ee ee ee ee ee — INQUIRY COUPON Pewee ewe Ss LS =: 0. LASALLE EXTENSION UNIVERSITY Dept.1264-HR CHICAGO, ILLINOIS Please send me your book, ** Account , the Profession that Pays,”’ and full information regarding the course and service. Alsoa copy of ‘“Ten Years’ Promotion in One,’’ all without obligation to me. : Training for position as Auditor, Comptroller, CL) Higher Accountancy: Exttited rusuS Accountant, Gest Accountant, ote: Other LaSalle Training Courses: LaSalle is the largest business training institution in the world. It offers training for every important ness n If mors interested in any of these courses, check here: o Business Management: Training for Offi- oO Personnel and Employment Manage- eel. Managerial, and Departmental ment: eg in = — of — ecutive positions. justri ations anager, [J Traffic Management—Foreign and Employment Manager, and positions relat: Industrial "Tratie p in my tay chien ing for execu- affic \ " e: n Freight Solicitor, etc. oO tive positions in Banks and Financial Insti- (0 Commercial Law: Reading, Reference and tions. Consultation Service for Business Men. oO Law: Training for Bar; LL. B. degree. Cpietere tempest, Trice ES maser seaten 3 Train as es Executive, " es i z it: ning Coach or Trainer, Sales Promotion Manager, 0 for peakten, of Station Accountant, Cashier Manufacturer’s Agent, Solicitor,and al! posi- and Agent, Division Agent, etc. tions in retail, wb 1 OF Ity selling. (1) Modern Foremanship and Production o Modern Busi Correspond and Methods: Training for positions in snap Practice: Training for position as Sales or Management, such as that of Superintend- Collection Correspondent, Sales Promotion ent, General Foreman, Foreman, Sub-Fore- Manager, Mail Sales Manager, Secretary ,etc. a director of the National Association of Cost Accountants. He is assisted by a staff of 75 in- keeping: Training for position as Head Bookkeeper oO Indus M ment Efficiency: 1rs'n- ing for positions in Works Management. !'ro duction Control, Industrial Engineer! 14 Business English: Training for Business Correspondents and Copy Writers. ( Commercial ish: Training for | tion as Foreign Correspondent with Spa ing countries. oO Effective Speaking: Training in the ar forceful, effective speech for Minis Salesmen, Fraternal Leaders, Politici« Manager, a Clubmen, ete. oc: P. A. Coaching for Advanced Ac countants. Name Present Posttion......... Address

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POPULAR MECHANICS ADVERTISING SECTION Imecican Hyer Railroe and“ Structo” Hoisting Toys and Autos | “American Flyer” Railroad Equipment shown in large illustration above nd Track-—No. Electric 12 el engine — an copy of the York Central ric Locomotive headlight, auto- reverse, mail ? Pullmans—all ric lighted, 20 s of track, length 1in 48 inches— k 202 inches— $26.00 Lighted Sta- No. 99—$6.25 tic Block Sig- . 2018—$3.75 atic Cqmeoners ghted No. 2015 $3.75 iph Pole—No. $0.50 ng Gate — No. $1.25 No. 86-—$1.50 | ed Transformer N 1250—$3.75 Bridge — No. 213 — $1.25 ge Room — No. $3.00 ger — Bell and eht— No. 2016— $3 75 ng Signal — No. — $0.35 rm Station—No. $1.25 illboard — No, 92 — $0.35 No. 216—$0.60 : No. 214 — Set » Are L ight—No. d O10 EE. 25 s advertisement to dealer, if he hasn't American Flyer” to Toys and Autos i want, and doesn't rd r them, we will 1y Train, Hoisting to or Equipment 1, postpaid, on ipt of cash HAT are you going to do this aft?” pipes up Pinkey as the three boys burst out of school on a cold winter day. “I’m for going into the house and doing some- thing,” is little Bill’s immediate response. “Say, you birds I’ve got it!” suggests Frank, “C’mon over to my house. I’ve got my “American Flyer” train and a lot of new equipment; a new station, a new semaphore and a bear of a crossing gate. Whadda you say?” “You’re on,” said Bill— and the young American Flyer trio £ y "started to Frank’s house on the run. Sse double-truck cars, tunnel; rheostat and Price, delivered, $12.00 No. 1221—Electric Engine, with headlight, 8 inches; 3 6% inches, 14 pieces of track, semaphore, station track connection. Length of train, 31 inches. American No. 2—Mechanical Engine, with brake and pines | rods Flyer 6% inches, tender 4 inches, cars 544 inches; baggage car Transformer has sliding doors; 10 pieces of track; 103 inches; length of Price delivered, train, 24'4 inches. $3.75 Price, delivered, $2.65 No. 13—Mechanical Engine, with brake and piston rods 7 inches, tender 4 inches, cars 5‘ inches, baggage car has s ding doors; 12 pieces of track, 2 switches, length of track, 160 inches, length of train, 25 inches. Price, delivered, $4.25 Send ten cents and we will mail you Horace Wade's famous story about *‘The Backyard Railroad’’ and the beautiful catalogue il- lustrated in color showing the full line of American Flyer trains and Structo Hoisting Toys and Autos. American Flyer Mfg. Co. 2233 So. Halsted St., Chicago STRUCTO Hoisting Toys & Autos Loads end Dumps Automatically Height 12% Inches Length 214 laches Width 6 Inches Price Delivered $3.75 STRUCTO Giant Steam Shovel No. Model of Real **Cletrac’’ Type Tractor Trailer Included— Length Over-all 15 in. Price Delivered $3.25 iS; STRUCTO *“*Ready-Built"’ Cater- pillar Tractor No. 44 Loads and Dumps Automatically Height 12 Inches Length 13 Inches Width 4% Inches Price Delivered $2.25 STRUCTO Grab Bucket No. 52 Powerful Spring Motor Special Body Raising Attachment Length Over-all 12 Inches Price Delivered STRUCTO **Ready-Built"’ Contractor's Truck No. 42

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POPULAR MECHANICS ADVERTISING SECTION The People’s Telephone The telephone knows no favorites. It does the bidding of the country store and of the city bank. It is found in the ranch house kitchen and in the drawing-room of the city mansion. Its wires penetrate the northern forest, stretch across the prairie, are tunneled under city streets. The telephone knows no favorites. Its service to all the people is of the same high standard—the Bell System standard, ‘Twenty-four hours a day it carries the voices of all. For the benefit of all, the long-distance cir- cuits are kept in tune. Numberless discoveries and improvements devel- AMERICAN TELEPHONE AND TELEGRAPH COMPANY oped by the Bell System have made the telephone more useful for all the people. In America, all can afford the telephone, for Bell System service is the cheapest, as well as the best, in the world. The telephone knows no favorites It is not owned in any one locality or by any particular group of men. It is owned by 350,000 stockholders, who represent a cross-section of the thrift of the whole country. The owners of the telephone are those it serves. In America to-day the 15,000,000 telephones of the Bell System con tribute to the security, happiness and efficiency of all the people. AND ASSOCIATED COMPANIES BELL SYSTEM One Policy, One System, Universal Service

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x POPULAR MECHANICS ADVERTISING SECTION **Yankee”’ Radio Tool Set No. 106 Comprises Set No. 105 (see des- cription below) and Drill No. 1431 in mahogany-finished Radio Tool Chest, as illustrated. Packed in handsome holly box. The Ideal Christmas Gift Price, $8.50 ‘ for the Radio Fan e “YANKEE” Radio Tools \\ THAT interests men the most about radio? Tinkering, of vuurse! Building new sets; changing hook-ups on old perimenting for better results. . . that’s what men enjoy. rift of ‘*Yankee”’’ Radio Tools is sure to be appreciated. “Yankee”? Radio Tool Set No. 105. Price, $3.25 ‘o. 105 comprises ““Yankee” Ratchet Tool Holder (a) with ee" Radio Attachments as follows: rew-driver Blade (h) —for reaching into box, between wires, etc. rew-driver Blade (c)—for screws on dials, etc. Screw-driver Blade (g)—for putting up aerials, etc. ink (f)—for sinking heads of screws, b)—for enlarging holes in panel. nder (j)—for making loops and turns. t Wrenches (d e)—two sizes—to cover all small nuts. t Wrench (i) —for square or hex, one end; other end, hex, for jacks. 1 holly box. Yankee” Radio Drill No. 1431. Price, $3.00 | is a compact, powerful, perfectly balanced hand drill with four to t for speed and special radio chuck. ty 9/32 inch, Packed in holly box. Write for FREE “Yankee” Tool ‘ - . , Book Set No. 105. Price, $3.25 Yankee” Radio Drill No. 1431 Pedved in ath tun Price, $3.00. Packed in gift box Your hardware dealer can supply “Yankee” Radio Tools NORTH BROS. MFG. CO., Philadelphia, U “YANKEE TOOLS Make Beller Nechanicsa

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POPULAR MECHANICS ADVERTISING SECTION cA thoughtful, helpful, useful gift HE Remington Portable istruly a universal gift—welcomed by people who write, much or little, the world over. It is saving the time of countless women. Itis greatly assist- ing children in their school work, and properly training them forthe future. It is indispensable to the college stu- dent of today. And men find in the always ready to lighten every writing task. It is the modern way to write. The Remington Portable, com- plete with case, and in a beautiful Christmas container, $60. Easy pay- ment terms if desired. For sale by all Remington branches and over 5000 dealers everywhere. Write for illustrated, **For You—for Ev ery- Remington Portable a little helper body.’ Address Department 12. REMINGTON TYPEWRITER COMPANY 374 Broadway, New York—Branches Everywhere Remington Portable THE RECOGNIZED LEADER-IN SALES AND POPULARITY

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POPULAR MECHANICS ADVERTISING SECTION ear sston D-8, “The Saw Most Car- ters | » 9 se The most widely used world --2 = * A regu- ston-made saw for your boy. san ideal Christmas gift. ———_ i n Nest of Saws No. 3. For enters and householders. Con- "keyhole blade, 14" compass and 16" utility or pruning saw American Boy Saw. n Plumber’s Nest of Saws No. ame as No. 3 except large blade hes) is metal-curting saw, for led nails, lead pipe, etc. Hardware dealers the The Day that Europe Turned to America for Saws VER at your nearest hard- ware dealer’s there is a saw you will want to see For it is the make that brought Europe —and the world—to America for saws! As though his whole future depended upon it, a young man was smithing a saw. The place was Philadelphia. The year, 1840. The blows of the smithing hammer on that saw, in the little shop, were the real start of America’s saw-making industry. For while Henry Disston thus smithed his first saw, America was being built with saws made abroad! The young saw maker worked on. Trying out steels in a furnace made with his own hands. Tem- pering and smithing blades. Set- ting, filing and testing saws. Here a carpenter,there a carpenter, tried the saws with the Disston name. They found hang and balance they had known in any tool; —temper that gave spring and life; —clearance that made work easier; —a cutting edge that held. They found a saw that worked with never hand and arm: sawing straight, cutting keenly without dragging, and with never a wobble. The news spread! Andthen camethedayofthe American- made saw—the day when Europe reached across the Atlantic for Disston Hand Saws, ounu Henry Disston now made his own steel— America’s first crucible saw steel. And Disston Saws of Disston Steel won the world! All the while—a greater thing than working with metals, he worked with men: Making saw makers, passing on to them his skill, his ambitions, his tireless- ness fi Tt exe ell nce. The little shop became the largest saw works on earth—68 buildings, 3600 crattsmen. Remember all this, when next you visit your hardware dealer’s. Ask to see the Disston Hand Saw, world famous as “The Saw Most Carpenters Use.”’ Grasp the handle and try the balance. Nore taper and finish; filing and set. Then make that saw your own. Don’t stop until you have drawn a line across a board and sent your Disston saw sing- ing along that line— straight and true. Ask Disston Tell us what kind of work you are doing, in wood, metal, stone, or other material, and we will tell you what types of saws to use. Disston issues many books to aid the user of saws and tools, HENRY DISSTON & SONS, Inc. Philadelphia, U.S. A. world around sell Disston Saws, Tools, and Files DISSTON

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POPULAR MECHANICS ADVERTISING SECTION The shcll is ORANGE Bakelite —the base genu- ine Thermoplax The More You Know About Radio the Better You Will Like This Socket If ever a device were designed to increase the efficiency of all receiving sets, it was this new socket by the Master Builder. Radio Engineers praise it — new set builders marvel at its ease of installation and the clear, loud reception obtained that bespeaks the absence of losses—many old-timers have even rewired their sets to establish new distance records and enjoy clearer reception with this better socket. You'll like its construction, embodying a minimum of both insulation and metal—capacity absolutely minimized without sacrifice of mechanical trength. And its base of ebony Thermoplax in beautiful color contrast with the thin shell of orange Bakelite adds greatly to the appearance of any set as the construction does to its efficiency. You'll like its contacts (the source of losses and noise in most sockets); they are radically new in design, formed of phosphor bronze and si/ver plated —because the contact resistance of silver does not increase as it stands exposed to air. Then, too, electrical losses are minimized by provid- ing maximum spacing between terminals, both in insulation and in the air. You will like the way the tube is inserted and removed without turning —which prevents twisting the bulb from its base. You will like its ap- pearance — its small size —its neatness. Y ou will like its silvered posts with slotted nuts that are fastened we// with either screw driver or wrench. You will like the way these terminals are arranged for soldering—extra long so that they may be bent down where under-wiring is desired—and provided with ears to hold the wire in place for soldering. And best of all you will like the price, goc. This socket that meets the specifications of the most exacting radio engineer costs no more than most of those on the market today! \f your dealer has not yet been stocked, you can be supplied direct from factory at regular price plus 1oc for packing and postage. THE CUTLER-HAMMER MFG. CO. Member Radio Seétion, Associated Manufa@urers of Eleédtrical Supplies Works: MILWAUKEE and NEW YORK “Built By The Master Builder” These Exclusive Features Assure Better Reception Perfect contact. Both sides tube prong cleaned whe serted no contact of wear soldered end. B All metal parts silver plated- pertect contact for the life the set. Silver may tarnish t its contact resistance does change. Cc One piece contact construc tion. The binding post is NOT a part of the circuit—the wire to the socket always touches t contact strip which carries t current direct to the tube pr ——no joints to cause losses D Convenient terminals soldering —full length to a bending down for uftder ing. Ears hold wire in place for soldering. E Extra handy binding posts tight connections with eit wrench or screw-driver. I Kk washers hold terminals rig F Wide cpacing of current rying parts both in air a insulation—true low-loss struction. G A minimum of both metal a insulation for low capa Shell of thin Bakelite—the of genuine Thermoplax H The tube is held in pla merely a vertical motio twisting to separate bul base. The attractive orange shell helps identify this better socket, but the famous C-H trade mark both on the socket and on the orange and blue box is your gen- ~ uine protection. RADIO SOCKET = rs S30 SSS) 0) Pe, SS) 0) ss S90 SSS = 58U0">—eeSSSSS0 SIV 0cK— SSS 0c —— = 0S

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POPULAR MECHANICS ADVERTISING SECTION 119 BAER BROS. CO. li all t ll IMPORTANT si call Sater parertges weassbee and Joweley = a2 = ===. SS >0SS0 SoC ene enti 4 on Credit ; Our Guarantee x0G=T perfectly 3 | Absolute Satisfaction Hire ae] PL ATINUM, 2 cape Fy ring. or Your Money Back rengrarea «= Sold HOSE End res, exquisite P te ; rt - +8 eut blue white dia- ‘ew model richly en- mond. Very popular he triangular sap- yraved . . . 9O@ Gunscek $73.50 0 IOc = o= SS S>SS)0 = New 1925 DeLuxe Cats of « 1) s r a terms. "t Te etn 18 k. Solid ¥ rf or ea: ro ° - at you ber fedeth Fy 5 ring, i i eect cut bine boyd this ad a . reed and engrav- : gest the : X3i—PLATI- "Derfect eat blue ‘Te diamond. amen i ceienr MEE CATACOS Bl NUM top on 14 te diamond, $50 $22.50 j Xmas Gifts. white gold scarf : pin. B.ue white diamond, 4 sap- phires . 0 ——S="h = SS No deposit re- aquired. Simply send your name and address and say what article you want. Only if satis- fied pay 1-5th (20%) on arrival. Keep it for 10 days’ Free Trial. Your monty back if not satisfied or if you can dupli- cate these articles anywhere even gold ‘ ’ f for pony © : Other- > . white gold F : nite diamond , , wise pay balance in Pp perfeet cut blue goldri y fer “es. 10 equal monthly in- white diamond. stallments. We make no claims we == STZIC 1 SSSoc a ft __________ Transactionsstrict- ly confidential. purchase.' Don’t delay—order today, Address Dept. T-26 ath BAER BROS. CO. ca 6 MAIDEN LANE-NEW YORK =——) SSH) EERE OS OPER TT al a

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POPULAR MECHANICS ADVERTISING SECTION ae ILL’S got another new rule, I see. He sure does rust ‘em out.” =o Teves lie “Not any more—that rule is the same one he’s been using for the last two years. It always looks like that—it’s.a Starrett Stainless.” TEE Fc Ba RUST PROOF Starrett Stainless Steel Rules laugh at moisture, perspiration and certain acid fumes that soon destroy the usefulness of the ordinary rule. They are made from a fine quality non-rusting, non- staining steel. No. 1000 (hardened and tempered) is made in 6 and 12 inch lengths. No. 1020 (flex- ible) supplied in 6 inch length only. Like all Starrett Rules, the Stainless is graduated with ex- treme accuracy—a reading glass proves that even when magnified the division lines show up sharp and clean-cut—perfect in every way. Use Starrett Rules for closer and easier work. THE L. S. STARRETT CO. World's Greatest Toolmakers—Manufacturers of Hacksaws Unexc FREE REFERENCE TABLES ATHOL. MASS Wire Gauge Standards, Decimal lai . Equivalents, Allowances for Fits, Tap Drill Sizes, Color Chart for use in Tempering, Lubricants for Cutting Tools, Drill Speeds, Double Depth of Threads, Metric Conversion Tables Miscellaneous Measurements, Tables for Computing Weight of Cast Steel. All this and other valuable information needed by every tool-user will be found in the back of the NEW STARRETT CATA- LOG. Mailed FREE. Write for No. 23 *‘ap’’

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New Atlas speaker with the exclusive and strik- ingly beautiful bronze brown ripple-finish, POPULAR MECHANICS ADVERTISING SECTION \ TRADE \MARK : \ IO REPRODUCTION spéakser 7] ‘HE material of the horn itself r plays an important part in the faithfulness of Atlas Radio Reproduc- tion. The magnified cross-section ‘below shows how the resilient core / absorbs the vibrations of the horn material;while the rigid surface con- serves the sounds you gught to hear —as you want to hear them. Multiple Electric Prodyicts Co., Inc. 36 Spring St, Newark,/N. J., Dept. W New York, Boston, Philadelnhia, Baltimore, Pittsburgh, Detroit, Chicago, St. Louis, Denver, 550 Howard Stréet, San Francisco. Marconi Wireless ‘Telegraph Co. of Canada, Ltd. Sole Canadian Distributors Atlas unit, complete with attachment couplings, to fit all standard phono- éraphs.

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POPULAR MECHANICS ADVERTISING SECTION white gold fi AZ2—B: ‘ solid 14K white gold ftte ter set with abeslet. perfect. bi ment of 15 ruby and jewels. $22. ioe, ue fevten diamonds on sides gold shaok; 750 phire: looks. like $750 solitaire. $57.50. . sotitaire.c $67.50. ite perfect cut blue + 144K) white diamond of gold quality.$100 $2.00 Brings Your Choice se with wee NO RED TAPE—NO DELAY octne diamogd : French Simply send $2.00 and your choice goes to you ; blue ephires = charges paid. You have ten daysin which to decide. Money back instantly if you are not satisfied as to the quality and value. Ten Days’ Free Trial Send only $2.00 and your choice goes to you in handsome gift box all charges paid. Guar- antee Bond attesting to quality and value accompanies each shipment. A Full Year to Pay Simply send $2.00 and receive your selection, all charges paid. After trial pay balance in 12 monthly payments. 10% dis- count for Cash. Free Royal Xmas Catalog The mostcompleteCatalog ever published of diamonds, Watches, Jewelry, Silvere ware, Cameras, Ivory Toie let Sets, etc., sent FREE. Prices trom $65.00 to $1000— quality the high- est. Ten days’ trial anda full year to pay on every- thing you order trom our $2,000.000 stock. Send for your copy to- day. Dept. 1192 ROYAL Diamonp \Watcu Co. iZO Broadway - New York.

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POPULAR MECHANICS ADVERTISING SECTION Note the TAPERED BIT fast and isy cutting Hatchet cut away to show TAKE-UP WEDGE that keeps the handle always Look for the RED HANDLE with the BLACK HEAD exclusively PLUMB* Swings true; cuts fast ett 8 2 OU cut true to the line with a Plumb—the hatchet that carpenters choose. The blade is tapered for fast cutting—shaped and hung just right for easy, slicing strokes. It is forged steel, refined and toughened by armor- plate heat treatment, tempered for long, hard service. The edge stays sharp; the head stays tight, and you need that in your hatchet! At hardware stores, $1.50 (except in Far West and Canada). “They’re worth more.” FAYETTE R. PLUMB, Inc., Philadelphia, U.S. A. $18.50. *Red handle and Black Head Color Combination registered as PlumbTrade Mark in U.S. Patent Office | DOUBLE LIFE Hammers Hatchets

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POPULAR MECHANICS ADVERTISING SECTION The greatest thrill you ever had! 500 TOYS FOR fo ¥. with powerful electric motor Steam Shovel made from New Erector Walking Beam Engine made from New Erector A. C. GILBERT CO., 341 Blatchley Ave., New Haven, Conn. Enclosed please find 25c for the 146 page Book (easily worth $1.00) describing the hundreds of wonderful models made possible by New Erector, the World’s Greatest Construction Toy. Address EW Erector has many new fea- tures this year. Some of them are a steam shovel that digs sand and dumps its contents, a dredge bucket or clam digger; coal loader that unloads a car and loads it ina truck, boilers to make models of steam engines and curved girders to make round models as well as rec- tangular ones. These parts are all additions to the standard Erector parts known for years, including the sturdy square girder which can only be built with Erector and the powerful Erector electric motor to run models. “Five Hundred Toys in One” YOU never saw a construction toy like the New Erector. It is brand-new this year—the latest model with hundreds of new parts. I expect to see some wonderful results this year from the things boys have made with Erector. Erector is madeof steel with most parts nickel-plated and coated with lacquer baked on by electricity to prevent rusting. Sit right down now and send the coupon on the bottom of the page so I can tell you about this wonderful New Erector. And don’t fail to put the New Gilbert Erector at the head of your Christmas list this year. Your friend, Ofte New Features of the 1924 New Erector URVED Girders, Steam Shovel, Dreds ing Bucket, Steam Boiler, Smoke Stack Car Trucks, Cab Top, Engine Whee's Wagon Wheels, Propellers, Reflector, Mi Gears, Large Gears, Crown Gears, Pulley» Worm Gears, Drum, Eccentric Crank Flanged Wheels, Gear Box, Coup!i: Signal Arm, Eccentric Axle, Chain, Lure Steel Plates, Turret. Large Base Plates. «

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POPULAR MECHANICS ADVERTISING SECTION New device makes cold radiators hot |, pores HOT RADIATORs out of cold ones, is the achievement of an invention called Arrip The name originates in the operation of this ingenious contrivance which “rids” the radia- tor of “cold air.” Arp is a perfected air valve which performs its duty under all possible con- ditions, permitting the steam to push the air out, but preventing the escape of the steam itself. Despite the mechanical nicety of Airin, it is so simple that anyone can attach it toany steam radiator without tools in about two minutes. After that, the action is entirely automatic. Why steam radiators are partly cold Intelligent float knows the Whenever steam travels through the pipes of difference between airand steam a heating system, it pushes air ahead of it. The radiator is the end of the journey. There Inside the AIRID is a metal float, and inside the air packs into the radiator, and acts as a the float is a volatile liquid — the “brains” of : : ° > o valve, Cold alr Getwe arcand the fest, up barrier against the steam; hence the frequent through the vent-hols and out, Then atcam complaint that the radiator is half cold. Arrip enters the chamber of the valve, and that lets this cold air out; but that’s only half the is the signal for action. Instantly story. the liquid inside expands, swelling : ° * 4s the sensitive metal bottom of the float No sputtering or sizzling enough to raise it from its first posi- tion and to thrust a top pin up into the vent-hole. Thus the vent is closed and stays closed as long as the steam is on! Because the AIRID vent shuts absolutely tight, you are spared the misery of sputtering, bubbling and sizzling. This feature, alone, has endeared AIRID to many home owners. $1.60 — little enough for ia ; a hot radiator! ceo nt ag es: eh coat AIRID costs only $1.60. The installation can be t deal with it cot The “Soar” liter. M , made without tools in about two minutes. From ‘ " the moment AIRID begins to work, your radiator is hot — permanently. Not even water can escape ally floats on the rising water until heopeningis closed by the metal pin, as before. The water runs back into : : the radiator, not out on the floor. - sree ‘ ome one with $1.60 and prove this to your \ . . . a Made and guaranteed by \\, own satisfaction in / your coldest room. Pa AMERICAN RADIATOR COMPANY } P pias P RADIATOR COMPANY ] , a Specialties Dept. ) Ps 1807 Elmwood Ave. ) Y Buffalo, N.Y. a Il am enclosing $1.60 for an ] a“ AIRID Air Valve to make my ] Oa coldest radiator hot. | Sold at all heating and plumbing shops a PMNBsdiedend AIR-VALVES ns

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POPULAR MECHANICS ADVERTISING SECTION Whether you say “Merry Christmas” with a letter or a present, say it witha Waterman’s—a pen that writes a perfect letter and makes a perfect gift. Wwe you give a Waterman's there is no doubt about the value or acceptability of the gift. For forty years Waterman's has been recognized as the pen of all pens. DirrerenT sized holders for different sized hands; different pen points for different styles of writing. May be had from $2.50 to $50, depending upon size and decoration. Every pen is as perfect as a pen can be made. Mopets illustrated are made with our special feature, gold flexible lip- band. Holders red, mottled and black. Sell for $4.00, $5.50 and $6.50, according to size. Ask your merchant to show you a Waterman's Look for this show-card and Waterman's pens on display in merchants’ windows. 50,000 reliable merchants sell them. IQI BROADWAY, NEW YORK CHICAGO BOSTON SAN FRANCISCO MONTREAL

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POPULAR MECHANICS ADVERTISING SECTION , the 21 Jewel santa le Special Sent on approval Send noMoney We will send this famous watch, express prepaid, for you to examine, to inspect, to admire, to approve, with- out one penny advance payment. Examine the watch and be convinced it’s the best watch buy you ever saw, then just a small payment down, the balance in easy MONTHLY payments. You use the watch while paying for it. Save |, to! of Your Money by purchasing this famous Santa Fe Special Watch. Not only are you saving money from the present day prices of watches, but you can still secure the ‘‘Santa Fe Special’’ Watch at the same low prices and terms that have made our watches famous. Ladies’ Wrist Watches—The New Elite This Artistic, dependable Ladies’ Wrist Watch, fitted with genuine Illinois Springfield movements. A perfect timepiece. Beau tiful 14 Karat white or green solid gold cases. Ask for New Watch Book showing cases in all the new shapes and designs. Watch sent on approval and sold on payments. Send for Free Watch Book Clip the coupon, fill out and receive the FREE WATCH BOOK. All the newest watch case designs in white or green gold, fancy shapes and thin models are shown. Read our easy payment offer. Wear the watch 30 days FREE. Watch sent for your exami- nation and approval without a penny down. Nothing to risk. See the watch before you buy. Write for FREE book Today and Select Your Watch— Mail Coupon. Santa Fe Watch Company, Dept. C-6, Thomas Building, Topeka, Kans. The Home of the Great Santa Fe Railway a Santa Fe Ask for our Beautiful Diamond Book (e) Watch Co. FREE. Shows all the new styles in rings and tells about our rock bot- Dept. C-6 tom prices and our charge Thomas Building, account plan. Topeka, Kansas Please send prepaid ana without obligation your Watch Book Free, explaining your ““No Money Down” Offer on the Santa Fe Special Watch. A few conta a‘ day makes you own @ diamond. Address ee

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POPULAR MECHANICS ADVERTISING SECTION

Here’s Why I Added These NEW BROWN & SHARPE TOOLS To My Kit a yu Shes he e-

. < —esS 51 4 outs Mehe Sor SSS Ler “The Brown & Sharpe Thread Tool Gauge is adjustable and checks any thread cutting tool from a sharp V to a one inch flat within a given angle. It eliminates my keeping a No. 577—=Tiwead Toot Genes variety of slot gauges on hand for all the different pitches.”’

ceed ‘ewe

“I needed a thickness gauge with long blades and one that I knew was accurate, so I chose a Brown & Sharpe Thickness Gauge No. 649 because the 6" blades are accurately ground to size.”’ “My Brown & Sharpe Planer and Shaper Gauge No. 625, saves me much time. It is quickly set with a Micrometer, Vernier or Caliper arid then the planer cutting tool is accurately set to the gauge.”’

Learn more about these and other new and useful Brown & Sharpe Tools by send- ing for a copy of the No. 29 Small Too! Catalog, which is yours for the asking Write for a copy today BROWN & SHARPE MBG. Co. No. 625— Planer and Shaper Gauge PROVIDENCE, R. | Vv. S. A.

BROWN & SHARPE TOOLS “Standard of the Mechanical World” are the _ ete COSY

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POPULAR MECHANICS ADVERTISING SECTION {Xmas Gifts on Credi - 10 MONTHS TO PAY ‘ gi . ~ : a a uy your Christmas Gifts on our Easy, Confidential Credit Plan. ~ Sle) You pay only one-fifth after you receive and examine your pur- } hase, and the balance in ten equal monthly payments. Thou- sands of customers have expressed their satisfaction with this easy payment plan.

Sweet Diamonds are noted for their fiery brilliancy, superior AAl quality, and perfect cut. Everything you buy from Sweet’s is absolutely guaranteed to please you or your money will be refunded. Our watches, including every standard make are guar- anteed free of repairs for one year. We challenge comparison with the prices of any other concern, either cash or credit _—-, “a Behe tr Ths Pe UY OUR CHALLENGE If you do not find that our price on any diamond ring is lower at least 10 per cent than that charged by any other house, either cash or credit, we wi'l gladly refund your payment im full if you return the ring within two weeks. ew Diamond Book Our beautifal new Diamond and Gift Book is now ready. selections—Diamonds, Watches and Jewelry, All on Ten Months to pay. 2

It shows a wonderful assortment of gift Silverware, Ivoryware, Toilet Articles and Novelties. Send the Coupon for the Gift Book Today. N2450 Sparkling — Ladies’ en- \2152 — PLATINUM ay = we eet X24h4— 18K. —Gent’s 18K AA tiamend 14h, graved | MK. white SPRED-TOP rin din Ihe whité- «. mond cluster geld SPRED-TOP white gold SPRED- thal ring. scold Segenmartns Fiery, / dia. 5 rine. 18h. prongs, ring. Blue white TOP. Superior din- <77 50. , $22.50. $62.50 . $29.50. mond, $92.50. X2457--PLATINUM top, flexible bracelet with distinctively engraved an t i pierced de sign. Set with 3 | a gee cut and matched AAI quality diamonds and & sparkling, blue sapphires, $100. Swe SeEeE wees eee eee eee oe L. W. SWEET, Inc. 1656 Broadway, Dept. 64-T, New York Please send me my Free Copy of your new Diamond and Gift Book. X2se2—24 inch perfect Moeebird Pearts. monds and 3 sapphires, $45.

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POPULAR MECHANICS ADVERTISING SECTION Sargent Steel Block Plane Sargent Auto-Se Bench Plane He'll have it planed in a jitty! fe THIS home workshop, radio is king. In fact, a goodly number of big and little sets, comparable to expensive commercial types, have gone from this bench into neighbor- ing homes. This young man has a reputation for good workmanship. He takes particular pride in his ability to choose and use good tools. Once you have used the handy little Sargent Steel Block Plane no other finishing plane will do. It is great for work in close quarters, for smoothing up panels, bureau draw- ers that have been sticking, and similar things. It is as true and clean cutting and as finely made as the larger Auto-Set Bench Plane shown above. The Auto-Set, of course, should be in every workshop for use on the bigger jobs. It is light in weight and remarkably easy to adjust or sharpen. The chromium steel cutter may be removed, honed and replaced without changing the original ad- justment. Yet it is so firmly held in place that it never chatters even when cutting across the grain or over rough and knotty surfaces. You will find the Sargent Auto-Set Plane an aid to speed and accuracy. See these Sargent Planes at your hardware dealer’s and write us for interesting booklet. SARGENT & COMPANY 49 Water Street Hardware Manufacturers New Haven, Conn. SAR Jools & Hardu are

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POPULAR MECHANICS ADVERTISING SECTION For a Merry Christmas—for a merry time every day and for many years to come— give your loved ones a Thompson Radio Receiving Set, a Thompson Speaker, or both. GhHOoMPsONn RADIO Thompson Radio Receiving Sets and Thompson Radio Speakers deliver the highest quality of sim- plified and economical radio enter- tainment. Both nearby and distant radio programs cannot be more faithfully reproduced than with a Thompson Radio Receiving Set. One of the many reasons for the advanced development and per- fection in Thompson Radio products is an organization com- posed of radio engineers who have been making radio apparatus exclu- sively ever since “radio” was called “wireless.” The §-tube Granpettt is $125. The 5-tube Partor Granp, (shown in large picture below) is $145. The 6-tube Concert Granp, is $180. Prices are without tubes or batteries. The Thompson Speaker, with conical diaphragm and other special fea- tures, is now $28. If your dealer does not handle Thompson Radio products, write direct to us for attractive literature and name of dealer near you. R. E. THOMPSON MANUFACTURING CO. Manufacturers of Radio Apparatus *for the U. S Army and Navy and many foreign governments A] SSS < ee) GN 30 CHURCH ST. NEW YORK, N. Y. FACTORY: JERSEY CITY, N. J

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POPULAR MECHANICS ADVERTISING SECTION a5 The best and most complete r saw equipment on the mar- ket— Complete Outfit as shown, including cord, plug, -: = / f if 7p, belt and pulley. ‘35

Re For Handy Man and Mechanic With this “little sawmill” you can make your own repairs in shop, home, farm or garage. In 100] ways it will save its cost many times over. Makes a clean edge on' the toughest wood—no pla: necessary. Rips, crosscuts, bevels, miters, mortises, tenons, or grooves quickly and accurat: Does the work of a skilled mechanic and saves you time, labor and money. MECHANICS’ BENCH SAWS — be attached to any lamp socket. Weight only 61 Cc Oo M P L ET E OUTFIT This saw will cut up to 114”. Indispensable to wood workers, carpenters, cabinet makers, pattern including cord, plug, makers, model makers, inlaid floor makers, hardwood pulley and belt, ever floor finishers, picture framejmakers, farmers, printers, radio build- thing complete, read ers, schools, colleges, homes, etc. All metal. Saw-size 6 inches. © —., . —F th 7 Table 10x13, base 7xi1, height 7 inches. Table tilts for beveling $60 VA LU t ton 6” ‘Nov elty Comt 5 degrees left, 10 degrees right. Hinged top for cutting grooves, — tion Cross Cut and |] tenons, rabbets. Bearings solid bronze with grease cup lubrication. East of the Missis- Saw, guaranteed t Guides removable and adjustable rip and cut-off. Sunlight \% h. p. sippi. We Pay Deliv- pg A res it motor; 110 volts; 60 cycle; 4.5 amps; 1750 R. P. M. Current A. ery Charges. utting. This > ee is eq C. Centrifugal switch with auxiliary finger. High grade steel shaft = Ss w est Ks Fe ped with extra heavy with ground bearing surface. Water and moisture proof insulat- g luty M r can be BUILDER’S HARDWARE AT *'2 PRICE! MOTOR Brett or hesey Send us your list for quotations or mail us your plans. We will te oon pT ans 4 Pay De — return them same day as received. Charges Anywhere in the U. $15. 90 Glass Knob INSIDE LOCK Set 1 Lock, japan case, 3'4 3 4x9; 16 steel plated face.

pr. Glass knobs with solid brass roses. 2 Solid brass escutcheons (key plate). $4.39 Parcel Post charges 15c eee Per dozen sets $15.95

SUNLIGHT1/4H. P. Motor Complete with $ 90 Cord, Plug and ‘ ' } flat = — GLASS DOOR KNOBS ty +1 LATCH SET Seep Solid Brass Roses With Glass Knob Deg mr! Value $30 We Pay D« A price never heard of S 1 Mortise latch, reversible livery Charges Anywhere in U. S. before for a high ; quality Tones Sac’ wee Renee soees 110 volts; 60 cycle; 4.5 amps; 1750 R. P.M glass knob. P. P charges iaatee ume tn. ses Current A.C. Guaranteed to handle 20 10c. Per dozen pairs, $11.00 Pair gn par doe poorer | jo Per Set overload. SEND FOR OUR CATALOG PAUL J. DEVITT, 1101-1107 So. 2nd St., Phila, Pa. HARDWARE HEADQUARTERS OF PHILADELPHIA

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POPULAR MECHANICS ADVERTISING SECTION a — FREE! THIS MILLION DOLLAR BOOK OF CHRISTMAS BARGAINS /' 4 M. LYON & CO. Any of the wonderful Christmas diamond values pictured above sent you for FREE EX- AMINATION—notone penny in advance. If you keep your selection, pay at the rate of Maid Only a Few Cents a Day Merely the “small change” you now waste on SP, Dept.i779 trifles will soon pay for a wonderful diamond. 8% yearly increase in value on all 4 ’ diamond exchanges absolutely guaranteed. Also 5% bonus privileges. Sa New York, N. ¥. Please send me at once your Big Million Dollar Bargain Book FREE. Get it now. Make / bie 128 pace MILLION choice from the Greatest Bargains in America. Send coupon for your copy DOLLAR BARGAIN today. Get the benefit of our liberal charge account plan. Write Dept. 1779 a BOOK, showing thousands of America’s Greatest Diamond and Jewelry Bargains. «oJ. M. LYON & CO. 1; Name 2 - 4 MAIDEN LANE, NEW YORK 4pe= /n Business Near/y \00 years City

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POPULAR MECHANICS ADVERTISING SECTION Artificial lightning was first publicly demonstrated on June 5, 1923, in the laboratory of the General Electric Company at Pittsfield, Mass., when a tw million-volt spark crashed into this miniature village. What’s the use of artificial lightning? It is mainly experimental, aiding General Electric scientists to solve high power transmission problems. Many such experiments yield no im- mediate return. When the General But in the long run this work is prac- ElectricCompany was formed, there was tical and important. It is part of the great need of organized : ? ceeeienhetanen: The study which must goon unceasingly ompany’s laborato- ‘ “ — : ries,in Schenectady and if this powerful force, Electricity, is elsewhere, have pio- ° ° nanaiiaaaeenied the to be fully tamed and enlisted in your service of electricity and in reducing its cost. Service. GENERAL ELECTRIC

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POPULAR MECHANICS ADVERTISING SECTION mind reader but I have a Suspicion that Someone in your home would like CORONA is such a satisfactory gift! To the novice at typewriting it brings a new and fascin- ating accomplishment — while the experienced typist finds it the most convenient, practical, sturdy writing machine the world has ever seen. Talk Corona over with your family today. See if some face (perhaps your own) doesn’t light up at the thought of a Corona for Christmas! Now three models The new Corona Four Corona Three, the orig- with standard office inal Personal Writing y keyboard, $60. Machine, $50. XC Corona, 90 charac- ter machine for foreign language or technical . writing, $55. This is the new CORONA FOUR with standard office keyboard. Look for CORONA in your phone book. Aare Cay

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POPULAR MECHANICS ADVERTISING SECTION Service Behind Gzaax Makes This Distance Possible + In Why Ozarka Receives from Honolulu CCASIONALLY some owner of a radio instrument receives from London, England. But did you ever hear of any one receiving Honolulu, Hawaiian Islands? We will gladly give you the names of the writers of the letters re- roduced here, as well as send copies of many etters showing how other Ozarka owners have had results from London, England, Cardiff, Wales and Glasgow, Scotland. These cases are exceptional, of course, but they must prove to every thinking person that the Ozarka is the greatest distance receiving instrument known today. In the ownership of an Ozarka Instrument, you are assured of not only the last word in radio, but you will receive expert service, which is far more important than the instru. ment itself. This is a point you should keep well in mind when you buy radio. Be absolutely sure that the person or firm from whom you purchase is thoroughlycapable of keeping that gertiames instrument in perfect condition. he situation in Radio is exactly the same as that of the automobile. Both are mechanical— both have little things go wrong at times, and both are quickly easily fixed by the man who knows how. The Ozarka Radio instrument is sold only by trained factory representatives who know every part, every wire of this instrument. Be- fore he can wear the Ozarka gold button he must satisfy our engineers that he is thor- oughly capable of delivering trained service. 4 Tube Ozarka Radio $39.50 and Up The Ozarka representative will gladly set up this Ozarka instrument in your own home on trial. He will not make any claims but will let you operate it and prove to yourself that it absolutely has no equal for volume, tone, dis- tance and ease of operation. This will not ob- ligate you in any way. And as for price, you will, no doubt, be agree- ably surprised because Ozarka Four Tube In- struments, for loud speaker operation, are sold as low as $39.50. Let us send you more information about Ozarka, including hundreds of letters giving the most marvelous results ever received on a radio instrument. Drop us a card for our free illustrated book No. 200. Please give name of your county. , Ozarka ne SOUrEh, Pa, ago, Iii k en:—J want ‘. think re to st dig. —KG ibleonmyOz_ an | slange?luln, Hawane eat many friends ” struments ~ 2 pent at all More Men Wanted To Sell Ozarka RAv!I0 offers today an exceptional oppore tunity for the right kind of a man to build up a permanent,substantial and prof- itable business of his own. Ozarka factory representatives are today building up very satisfactory incomes for themselves. In territory which is not now covered there is still an opportunity for a mechanically inclined man who is wi'ling to place himseif under our training. We can show such a man how itis possible,tobuild up a business in his own town, possibly in spare time to start with, but sooner or later will justify giving it all of his time. We are looking for men who realize that there must be some way of improving their condition, We prefer men who know abso- lutely nothing about radio, because we can then train them according to our own me’ * The man we are looking for has a good reputation, is well and favorably known in his community, may not be a salesman but can talk er pee | on something he knows perfectly and firmly believes in. The Ozarka Plan will give such a man his first real opportunity to establish himself in a business of his own. Investment of money is smal! but necessary. All we must make sure of is that you are determined and wiliing to put forth the effort. If you will do this just write and say; ‘Send me your Ozarka Plan Book No. 100."* It may be the turning point in your life. Don’t fail to mention the name of your county. Alden Bridge, Le. ve Ozarka Incorporated, Chicago, Ill. ights lemen:—A few nigh Gent T heard the beautiful Hawat ian Orchestra, dt- Honolulu, terri- This Batton identifies Ozarka Rep- resentativeinyourcity—yourassur- ance of complete radio satisfaction

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POPULAR MECHANICS ADVERTISING SECTION The Greatest Typewriter Bargain Ever Offered DOWN dreamed of—an eye opener. Rebuilt Underwood only $3.00 down. easiest monthly payments, shipped direct to you from our big factory. 10 Days’ Free Trial Yes, only $3.00 down puts this genuine late model Shipman-Ward Rebuilt Underwood in your home. You can try t it, and then decide. See for your- lf how new it is, how it writes. You t be satisfied. Your $3.00 uncon- nally returned if at the end of ten you are not satisfied. The entire isaction will not cost you one cent. EASY lemore than rental. Balance of pay- © small you will hardly notice while you enjoy the use of this erful machine. You don’t have )scrimp and save to pay cash. All at g Saving to you. Monthly Payments 5 Year Guarantee Witt ; 1 every typewriter we give a writ- guarantee. These machines are rebuilt like new by the famous SHIP- !AN-WARD PROCESS. Equipped with late improvements. You can’t tell them from a new machine. The 3; standard typewriter, the same by the Underwood ewriter Company today, at a big to you. Act now! Get this lid offer and save money. ré wor models as sold snler pie From Factory toYou These machines are shipped direct from our factory—the largest typewriter re- building plant in the world. They are rebuilt by the famous SHIPMAN- WARD PROCESS. Developed through 30 years in the typewriter business. Through our money saving methods of rebuilding and elimination of a large expensive sales force we are able to make this wonderful money saving offer to you. ACT TODAY, take advantage of it and you will SAVE MONEY. ACT NOW! Mail this coupon today. Free Book of Facts Write for this free book of facts explain- ing Shipman-Ward’s wonderful system of rebuilding typewriters. We show you exactly how it’s done. How you are able to buy them. Complete and valuable iriformation about the typewriter indus- try, both instructive and educational. FREE A complete course in touch typewrit ing. You don’t have to know how to operate a typewriter. You can learn to operate this machine in one day. We also give free a waterproof cover and all tools that come with a typewriter. with Every Typewriter Right now we are making you the greatest typewriter offer you ever This wonderful standard Shipman-Ward Ten days’ free trial and the 2 3 All Shipments made direct to you from our modern factory — the largest typewriter rebuilding plant in the world. 4-14-10 )0) @merel tl te) SHIPMAN-WARD MFG. CO. 2129 Shipman Bidg. Montrose and Ravenswood Aves. CHICAGO Send by return mail your wonderful off of Shipman-Ward Standard Rebuilt U nade wood, also your book of facts. (This ta not order and does not obligate me in any wa) STREET oe , SHIPMAN-WARD MFG. CO.! 2129 Shipman Bldg., Montrose and Ravenswood Aves.,Chicago | POST OFFICE

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POPULAR MECHANICS ADVERTISING SECTION What a Big Railroad Man about Lionel} SAS eel & cricae® Mile! — = a wt oy »* ed ust get all the thrill of pperating a real railroag ON s resident of . lwouker and St Paul Raslwey arr eee SF —— This is a photograph of the marvelous Lionel er Model Locomotrve referred to in Mr. Byram’s letter, coupled to a long train of Lionel Model Cars. The complete train as shown is Outfit 346 Pree € HAT is the statement of a man who knows the latest developments in railroading. He knows, too, that boys always Model Train, Crossing Gate, Signal want trains and equipment that are Tower, Switch or any of the many true to life—that not only look like other realistic Lionel railroad devices real trains, butoperateasrealtrainsdo. he knows that he has really got some- For 25 years Lionel has specialized thing 5 pean and lasting in- in the manufacture of model electric "°t€S¢ 2n¢ value, railroads—not mere ‘‘toys”. Since 1900 Complete Lionel“O” Gauge Model Lionel products have been“Standard Railroads are priced as low as $5.75 of the World”. Lionel has always —and a marvelous train for Lionel o— pioneered in the development of “Standard” Track, with illuminated ” electric model trains. coaches, at $16.50. (Prices slight!) ot Lionel Automatic Train The only difference between higher in the Far West.) There are Genu Control— The greatest y; teen . many other complete outfits to suit achievement in model ionel and real trains is the size. every purse railroad engineering. » rs : > 5 Starts and stops trains au- Take father with you to see Lionel Be sure to see these wonderful trains tomatically. Just one o, Trains demonstrated. He will get the your town at department, electric, sporting the many ey war reale same thrill out of them thatyoudo. s00ds, toy or hardware stores. istic ratlroad devices inthe The . he b th L Lionel line of Accessories. © power, the Desuty, the resmens : — of Lionel trains and Accessories is iii Send for Catalog : ali n on’t fail to write for your copy of enough to delight anybody. the wonderful 44-page Lionel Cataiog—i! When a fellow buys a Lionel _lustrated throughout in 4 colors. It is free. The LIONEL CORPORATION “a Dept. D 48-52 E. 21st Street NEW YORK CITY power plants. Run all NEL ae TRAINS |_ ae “MULTIVOLT TRANSFORMERS Lionel Multivolt” Trans- formers. Ever-reliable

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nal any ices me- ifi- POPULAR prices ——. total amou BIG MONEY-SAVING MECHANICS ADVERTISING SECTION Yoimiiambite Sensational Radio Bargain Book-F REF Order Direct from This Page! eu TREE, Car petons vite ethers. fully refunded i Save About One-Half! pagpect prado. peo known arts. O GUARA NIFE BR TECTS YOU. Money cheer- you are not satisfied. Be sure to write Ane order and state _— post office or express money order or bank draft for sure prompt shipment. ALL PRICES ON THIS PAGE INCLUDE SHIPPING CHARGES RIGHT TO YOUR DOOR. Refer to any bank or commercial agency regarding our reliability. If your favorite circuic is shown here, order direct from this ad. No skill required to build your own radio with Randolph parts. Panels are all drilled. Instructions are simple and complete. Everything comes ready to assemble. Order direct! All_shipping charges prepaid. Our Catalog ts Filled With Bargains Like These CONDENSERS 23-plate plain Condenser. $1.29 23-plate Vernier Condens'r 2.59 RHEOSTATS and POTENTIOMETERS Bakelite Rheostat, 6-ohm 38 Bakelite Rheostat, 30-ohm. .59 Bakelite Vernier Rheostat 1.15 Bakelite Potentiometer, 200-ohm -59 RADIO CATALOG TRANSFORMERS COMPLETE Randolph Special, 6 to 1, taining a thousand bargains | PARTS FOR 8-TUBE -16; 3% to 1 1.89 { everything on radio—parts, Sinclair L emyy 6 to 1, supplies complete parts for sets, SUPER-H ETERODYNE 2.55; ° 1 2.24 nplete sets, etc., also a mine § ,, ,, " - Tube socKers and DIALS ‘ very latest information on § 2 23 Plate Bremer-Tully or Duplex Low Loss Condensers 4° Hygrade Dial -29 diferent circuits, complete § 3 Remler or Columbia Intermediate Frequency Transformers. Bakelite Socket .28 of broadcasting stations, 1 Remler or Columbia Tuned Circuit Transformer Weston Plug 75 valuable, up-to-the- 1 Special Oscillator Coupler | Bakelite Potentiometer Mould yy 2. dio data. Send your 1 Midget Condenser 400-ohms NI OU — sriomete 39 ,ddress on a card or § 8 Bakelite Sockets 1 Carter Double Circuit Jack Bakelite mowseed 3.45 will send catalog free 2 Thordarson or Columbia A. ¥ | Dubilier | mfd. Condenser Randolph Special Transformers 1 .006 — yo = 12 2200-ohms ' 2.45 r. ; 1 Connecticut Filament Switch. 1 .0005 ica Condenser and 2 rd Spec i r ee Service Department 2 Bakelite 6-ohm Rheostats. mezohm grid leak ates Bt 3 ‘oub Spunisinis —_ engineers will help § 2 Bakelite 30-ohm ; 3 .00°5 Mica Condensers. Ame riean Be i] 3.95 ull your radio prob- §.1 Bakelite Terminal Strip for 1 .00025 Mica Condenser. With adjustable loud furnish up-to-date Binding Posts 9 Binding Posts 2 speaker unit -95 n on set construction, §. 1 Multicolucord cable for con- 2 4'o Volt C Batteries. , COUPLERS and COKS and improvement. necting batteries. 17x 30x 3-16 Drilled Bakelite 180° Variocouplers .95 eis free to customers. § 2 4” Bakelite Dials. Panel 1 Baseboard Reinartz Coils 1.25 35 ft. Hook-up $ 75 Electric Soldering Iron -98 Wire Cockaday Coil 1.65 Complete wiring dia- wf Three-Circuit Tuner 2.95 co “oMFror s-tUBE MEUTRODYNE RECEIVING SET Genuine Hazeltine Licensed Neutrodyne Parts Furnished PARTS FOR 5-TUBE SET: « Drilled Panel 1 .001 Condenser rson or Columbia 1 .006 Mica Condenser » Transformers. 35 feet Hook-up Wire elite Dials. 1 Kit consisting of 3 Hazeltine n Jacks Licensed Neutroformers and e Rheostat—30-ohm. 2 Neutrodons te Rheostat—6-ohm 1 Baseboard te Binding Post Strip. 2 Bezels 1 Binding Posvus Complete blue-prints eak and Condenser. working diagrams 53375 e Sockets. and instructions. — w'snae" Harkness Set led Bakelite Panel, 2 Harkness Reflex Trans- vith Condensers, 2 ials, 2 3akelite Sockets, 2 Ameri- lransformers, 1 Single Circu it Jack, 1 R. W. Crvstal r, 1 Bakelite Rheostat 6 ~} nding Posts, Base- l Busbar W ire, Blue-print to ce iplete aS 1 725 be Reflex $47.45 RANDOLPH gram, baseboard lay- out and blue- print, COMPLETE PARTS FOR THE Qur Gyara nfee Improved represented. Every article Four Circuit Tuner is tested before shipping. as designe: \ 1 Cemplete satistaction as designed by LM. Cockaday Be ro YY cotund — $39.65 COMPLETE Pauae COCKADAY | RECEIVING SET 1 Cockaday Goll 2 23-Plate Hy-Grade Cond 2 Grid Leak and Mica Cond 2 Bakelite Rheostats, 30-ohm. 7 Switch Points, 2 stops 1 Bakelite Rheostat, 6-ohm 1 Bakelite Binding Post Strip 3 Bakelite Sockets 7 Binding Posts 1 high ratio Columbia or Thor- 1 Switch Leve darson Transformer 24 ft. Hook-up Wire 1 Single Circuit Jack 1 7x21x'%’ Drilled Bakelite 1 low ratio Columbia or Thor- Panel 3-TUBE SET darson Transformer } Bezels 2 Double Circuit Jacks 1 Baseboard Cor plete b lue-prints and wiring diagrams $ 1 O35 1-Tube Set ° $10.45 se Reflex $3985 159 N. Union Ave. Dept. 246 Chicago, Illinois

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POPULAR MECHANICS ADVERTISING SECTION ‘Follow us, if you can!” HEY all take your dust when you open the throttle of the new “Stream-Line” Harley-Davidson! Everywhere, sportsmen are talking about this 1925 model of the world’s greatest motorcycle. Its rakish, stream-line design makes it the classiest mount on the road. It has more speed —more power. It is more comfortable (better springs and bigger tires). Yet the price is reduced! " . ° ° ’ a. 2. Treat yourself to the thrill of a trial ride on the new “Stream- Ask your deal 1 free demonstration ride Line” Harley-Davidson. Test the speed, power, and vibra- aaa his pana’ tionless comfort of this marvelous motorcycle. But look out Ride plan. Send ust for “speed cops” —most of them have Harley-Davidsons too! coupon (below) tod Money-making re _—eenw oe fo'in seen ter. | HARLEY-DAVIDSON MOTOR CO., Dept. P. — Milwa ritor Send me free literature showing new “Stream-Line” Harley-Da J actual colors. Name Address City

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POPULAR MECHANICS ADVERTISING SECTION WUuRLIIZER THE WORLD'S LARGEST MUSIC HOUSE

200 Years Ago in the little Saxon town of Schoeneck lived Hans Adam Wurlitzer, Master Violin Maker. His shop wasa gathering place for musicians of the time, for he was a true craftsman—the artisan the genius of the artist must depend.

upon w hose work

When he died his shop passed into the hands of his eldest son, and for seven generat down to the present day, the descendants of Hans Adam Wurlitzer have carried on his w Each succeeding generation has added a wider experience as new instruments have bee veloped, and a greater technical skill as methods of instrument building have been improved ons, In every Wurlitzer instrument you will find a quality, a character, that could not come mere excellence of manufacture, It is the heritage of these seven generations < craftsmanship.

T Any Wurlitzer Yr Instrument in Your Own Home free trial in your own home. Examine the instrument, show it to your friends, play it as much as you wish. No obligation to buy—no expense for the trial. We make this lib- eral offer because we want you to see for yourself the superior quality of Wurlitzer instruments, the result of 200 years’ exper- ience in musical instrument building. : ¢ may now have any Wurlitzer instrument for a week's Leading professionals everywhere recognize the artistic quality of Wurlitzer instruments. Ysaye, the great virtuoso; Salvi, inter- nationally famous as a harpist; Carl Preble of Sousa’s band; Justin Huber, leader of the well-known syncopated orchestra of that name—artists of the highest standing in every sphere of music use Wurlitzer instruments and recommend them to others. They speak especially of the ease of playing, a feature that is of importance to the amateur as well as the professional. Easy Payments If you decide to buy after the week's free trial, payments are occ in small monthly sums. A few cents a day will pay your instrument. By buying direct you obtain genuine Wurlitzer quality at moderate prices. Special offers on complete outtits—velvet lined case, all accessories, self-instructor, etc.— 4 ey gt ld ee ay la all you need at practically the cost of the instrument alone. 329 S. Wabash Ave., Chicago 250 Stockton St., San Francisco

Bend me, absolutely free, your new finstrated catalog, with prices and desc ription of every known music cal instrument. Also Cc 1 € tell me how I may try any instrument in my own bome and pay Send for N ew ata og e for it in small monthly sums. No obligation. The greatest musical catalog ever published! Over 3,000 articles Name - ery known instrument described and illustrated; many of them shown in full colors. Gives you lowest prices and all de- tails of Free Trial, Easy Payment plan. All sent FREE—no City obligation. Send the coupon today. Address

Inatrument State Instrument in which you are interested

Fill out this coupon and mail to address nearest you a Copyright, 1924, The Rudolph Wurlitzer Co

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Exclusive features give Erla Miniloss Condensers high- est efficiency. Dielectric and resistance losses absolutely minimized. Compensating plate form. 5 to 41 plates, priced $3.50 to $5.50 each. Uncanny smoothness and sensitiveness bespeak the advanced design of Eria Precision Rheostats. Single hole mounting eliminates need for disassembly. 6, 25, or 40o0hm. Price, $!.10each. Built for permanent true running; with Bakelite knob shaped for sensitive touch; and highly artistic calibra- tion, Erla dials better any panel, Three sizes for %” shaft. Price, 50c to $1.25, Adding to receiver efficiency is the advanced Erla Loop. Rigidly peers rheeetedine folded—easy in rotation— beautifully finished. Stand- ard an POPULAR MECHANICS ADVERTISING SECTION PD) d De Luxe models, $7.50 and $10 respectively. oO CIR-KIT builds new Supereflex— Greatest of Erla Circuits Erla led the radio amateur out of the wilderness of circuits. Erla initially introduced exclusive circuit ideas which made radio history, particu- larly because those ideas have un- interruptedly kept Erla circuits in advance of contemporary radio. Remarkably significant is the fact that so many thousands of seasoned experimenters, once attracted to Erla circuits, consistently adhere to Erla. So there is a note of finality when Erla now announces the new Erla Supereflex Circuits. They rep- resent highest development of the inherently superior Erla principles, acknowledged responsible for the most powerful circuits ever built, tube for tube. Bringing these latest and finest cir- cuits within the reach of everyone is the Erla CIR-KIT, effecting not only extreme economy, but also greatest ease of construction. Only screwdriver and pliers are needed to ’ transform any Erla CIR-KIT quick- ly and skilltully into the most eff- cient of radio receivers. CIR-KIT provides you with every- thing, including specially designed Erla Synchronizing Transformers, Erla Certified Capacity Condensers, Erla Cushion Sockets, and finally Erla famous Solderless Connectors banishing all solder difficulties. Each unit and connection is unerringly located through full-size blue-prints; drilled, lettered panel; and stenciled baseboard. With Erla CIR-KIT you yourself can confidently and proudly put into finished form the highest achieve ment of Erla radio engineers—Erla Supereflex Circuits. C/R-K/7 ceivers of one to five tubes are avail able, in loop and antenna types. See the Erla dealer, or write direct mentioning your dealer. ELECTRICAL RESEARCH LABORATORIES Department J, 2500 Cottage Grove Avenue, CHICAGO Circuits L fr of Certainty

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i — ded to quick. st efh- every- signed rmers, ensers, finally ectors Each rit gly prints; ric led urself it into h eve Erla POPULAR MECHANICS ADVERTISING SECTION mith the IO DAYS TRIAL In Your Home or Office This is your opportunity to actually use this Royal 10 Typewriter for ten days without obligation to buy. Com- pare it and its work with all other typewriters. You will readily see why hundreds of thousands of type- ‘. writer users ee re Royal. ae oe’ fill is 4 coupon and mail at once. We will send the Buys This Royal 10 Royal for ten days’ trial without obligation to ° ° . : buy. You must be entirely satisfied in every Think ofit! Securing this latest model Royal way that this is the orostent 10 fully guaranteed, with all latest improvements nee -eger-g < Seee for about half theoriginal factory price. Simply send us Act Now $3.00 with the coupon and we will send the Royal for ten days’ Sheen ae atte o Rate trial without obligation to buy. After trial, and when entirely ° member of these Royal satisfied send us only $5.00 per month until our low direct-from-factory Typewriters at our low price, $58.00, has been paid and the machine is then yours. We give you direct - from - factory the same guarantee as if you paid the original factory price. vo, your Net cash price only $52.20 Direct from our factory to you. ; Young Process Re-Manufactured /4 “ ” 4 “Ff The famous “Young Process” means a mechanically per- / YOUNG TYPEWRITER CO., Dept. 210€ fect operating typewriter, guaranteed like new. Every / 654 W. Randolph St., Chicago, Ill. typewriter is completely torn down, cleaned thoroughly by our You may send me the Royal 10 Type- special process; hand-brush enameled, baked in our special {pr writer, fully guaranteed, on ten days’ ovens; highest quality nickel-plated; all worn, weak or / 2, trial, express charges collect. I enctose faulty parts replaced with new parts, entire machine com- 7%, $87 hae ayy dy Ape» ey pletely assembled, adjusted and perfectly aligned by 13¢ 7 comes mine. It is understood that title re- specialized typewriter experts. ine mains with you until all payments are made You cannot tell the ““Young Process Re-Manufactured" /<°,° 7 Also that I may return the typewriter. at your Royal from a brand new typewriter in appearance, - expense, within the trial period, if I choose no service and workmanship. Comes to you guaranteed 4 tokeepit and you will refund my deposit for five yearsat about halforiginal factory price. Name Young Typewriter Co. ihonlis 654 W. Randolph, Dept. 210C, Chicago ~ cw............. .

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POPULAR MECHANICS ADVERTISING SECTION Without this: tree i mg athletics would be impossible 140-page Book full of life- VVEETHER it’s tennis or basketball — size ruled forms, each one football or baseball —nearly all sports completely filled in. The an- depend to some extent on the product of | swer to problems of account- one tree! ing and record keeping for That is the rubber tree. any business or profession. Send for this FREE Book today John C. Moore Corporation : : : (Estabi shed 1839) Rubber is made from latex—a milky-white ; 2168 Stone St.. Rochester, N. Y fluid —that oozes from the bark of the ruyber tree. Rubber trees are now grown in well- 9 tended plantations. The largest rubber or- MOORE S LOOSE LEAF chard in the world is owned by the makers of Keds. . 4 ‘3 SYSTEHS In it is produced today some of the finest rubber known. In Use In More Than It’s this rubber that gives to the Keds sole 300, Offices a lightness and spring that ordinary rubber Without rubber many games would have to be played quite differently —or not at all. can never impart. It explains why Keds soles are so tough and wear so long. I O f fey Keds vary in price according to grade, size and Ford Touring Top and Back Curtain jle—from $1.2 4.50 ae a te ae ere 32 o., $5.25; 36 oz., $6.25; Side Curtains, $5.25; Door-O It is important to remember that Keds are made tyne, $6.95; Back Curti ain, regular, $2; Gypsy type, $4 only by the United States Rubber Company. And One-Man Top, fits 1915 to 1922 model, ail new bows a i curtains, 325. Chevrolet, Dodge, Overland 4 tops, 34 ooeny Soe shee -— ~g mame Keds on &. No other $9.75; double texture, $1225. 6x18 giass Gypsy Curtal: shoe can give rea cs service. $2. Tacks, ete , furnishe d ready to put on. Delivered 1000 The Keds Hand-book for Boys is full of things Vanderpools’s Top Factory, Dept. 12P, Springfield, Ohle every boy will want to know about—how to make things, rules for games, woodcraft, etc. Taxidermy Sent free if you address Dept. 736, 1790 Broad- Book Mount ir 8 way, New York City. We teach you by mail to stuff and mount a’! * United States Rubber Company sites cad'mane rege, Be you ove Decorate your home wi th your beautif al tr ~ st a increase your incomese!ling specimens an og for others. Easily, quickly learned in spare t 9% men and women. Highest endorsements by t at students. Write today for our Bro free book “How to Mount Birds and Ani is”? Free—write tolate uw. i ne A sturdy athletic- trim Keds model— populareveryw here FreeB I t, ja jetin lists diamonds as low as $60 per cara ak. Bargain etener ee ‘s\eus 1-18 §ee's0 sores corroctiy. cut diamond, a snappy blesies so wm all the al lends money on diamonds. oS sof and other bargains. Many from big cash ow aropean Diamond Cutters, Must sell NO WHY PAY FULL PRICES a hay Pwo en ores oat ca They are not Keds unless the name Unpaid Loans. Sent Free. Describes Diamond Rareaine Sent g tves cash loan Keds is on the shoe Wnited cxchange privilege. W Jos. De Roy & Sons, Only Opposite Post Office Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION ise Old Trapper state of Ohio there lived a bunch of boys id this trapping business down to a science. ich sent for separate price lists every year n sent all their furs to the house giving t quotations. After five years they decided eren't so dreadfully wise because they didn’t ough profits to make their efforts worth y they met Tom McMillan driving a new town. Tom said he made the price of | outfit shipping pelts. He told how he se to those funny prices and found it was to deal with Chas. Porter because he always n advance just what he was sure of getting. that Porter never offered $5 for a $3 pelt ilways paid the $3 which he promised and es a little better. Chas. Porter now has trappers in that section instead of one. Don’t Take a FU RS Chance With Your »ur name Your furs mean real dollars to Get you. Why sell them to some fellow Bulletins, Who offers you $1.25 when you Tags, and know blame well you are lucky lars. Doe %° get fifty cents. Ask the wise This trapper who knows. Once a Chas. ~ Porter shipper and you will always be one. You know in advance that we give a square deal and every shipment brings sure money. dollars » don't put ite today. CHARLES S. PORTER, INC. 123 West 27th Street New York CAMERAS Over a Hundred Styles and Sizes Send for new illustrated catalog show- ing latest reduced prices. It’s Free. 10 days’ trial given SENECA CAMERA MFG. COMPANY 306 Central Avenue Rochester, N. Y. ¥ on PSD : A. recess see SPA vd Make This a Big Season! TR AP early and long! Get full value by shipping to McCullough & Tumbach. Our graders know the market—they pay every cent a skin will bring We guarantee our prices to top the market—and your check goes out the day the furs come in. SHIP FURS NOW! For 31 years our business has grown by honest dealing. Ask any old-timer—then send us a shipment. The check will prove every word we say. Free: Shipping tags, price lists; trappers’ supply catalog. McCULLOUGH & TUMBACH Nature’s Rogues Weasel tracks— two-fifths actual Gallery No. 6 size The Wease!l— One of the most ferocious little beasts alive. Kills from sheer lust of slaughter. A sure way to bring down nature’s thieves —a sharp-shooting Sporter HERE are over thirty relentless birds and beasts that prey upon our crops and useful wild life. Stop this destruction with your Savage Sporter. In this trim little rifle you have six shots always ready—and a smooth gliding bolt-action that will feed them up quickly and surely. And as for accuracy—that’s the Sporter’s middle name—for it’s built with all the finest features of military rifles—to shoot straight. Just take one look at the lines of this trim little beauty. Not an extra bit of weight any- where—yet steady and true to hold. No matter what you want to shoot—no mat- ter what you want to pay—you will find a Savage .22 that is just what you’re looking for. Write us today to send you an illus- trated catalog describing Savage fire arms. SAVAGE ARMS CORPORATION Dept. 21, Utica, N. Y. Owners and Operators of the ]. Stevens Arms Company The Savage Sporter bs . Bolt-action repeating rifle, round blued barrel, gen uine American walnut stock, varnish finish, pistol grip, interchangeable mag- azine Model 23A_ .22 cal. $19.50 Model 23B .25-20 cal. 23.50 Model 23C 32-20 cal. 23.50 SAVAGE STEVENS 129 N. Main St., St. Louis, Mo. Z ws Oa, MNGn

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POPULAR MECHANICS ADVERTISING SECTION EAF ? fq cot Sing Sian to every user of the CROWN /ue/ Saver Then iWoaas S Put that 20% saving in dollars and cents. Fig- a new deal ure it up on the amount you spent for coal last year. Add up how much a 20% coal saving means to you over a five or ten year period and d and you'll decide that the inexpensive CROWN Square Deal Fuel Saver is worth while investigating. % Money Refunded The CROWN guarantee is absolute. Attach this ama: ing coal-saver and heat-producer to the feed door of you heating plant and you must make an actual saving in fu Amazin new hearin aid of at least a )%o—Ox your money will be refunded withou g g question. 20% is the minimum coal-saving possible the CROWN;; some users obtain yearly savings of —finest and smallest in | others as much as | the world fe car raow pemeecy _ Begin your coal and | AT HALF USUAL PRICE Pers .ii.5 0 moneysavings NOW Get cleaner, steadier hy a | that will keep your | FREE FULL WEEK’S TRIAL P| ) comfortably warm; ae less trips to fire the fur: Physicians and deaf folks have long com- —r _— ~ dead a ‘ ° - . . ‘ ~ gases ry a aching tne plained of the high prices of hearing aids. : CROWN to your furna ow this protest has been answered by a Write today for fu new and tiny device called THE AURIS tails of this guaranteed coal-saver and heat-produ —priced at less than half the price of other CFSCO., 412 N. 10th St., Richmond, Ind. methods ad 4 7 x Distributors Wanted. High-grade mencan But the AURIS has gone further than build profitable businesses in their commun substantial price reduction. It has fulfilled ties. Write for interesting proposition the dream of all Aurists and ear-specialists for a perfect hearing aid—in minimum size $ and weight. | 5 aM "2 Although the smallest device of its kind in the Finest bicycle built—44 Styles, colors and world, it is the most powerful and efficient. Worn sizes. Factory-to-Rider prices. FREE delivery, ex- practically concealed, it acts as a third ear to the press prepaid on 30 Days Free Trial. Cash or easy deaf — enabling impaired ear nerves to hear any payments. swenden, a and up. 6 at halt sound a normal ear can hear — clearly, distinctly, Tires a, Se Ges eye SS , : . - usual prices.Send no money. Write today resonantly, without mechanical distortion. Gives for big catalog, specia: factory prices, free trial [3 natural hearing, with full tone values. Perfected by plan and marvelous offers. Radio Engineers from new Radio sound principles. CYCLE COMPANY | Renee fae Know the happiness of clear, easy hearing again. DEPE “. CHICAGO ia pees one eevee End the lonely isolation of deafness. You may try 108 748 ae THE AURIS a full week without a penny of risk or expense. Without a deposit or payment of any kind. Just send your name, address and free trial request to THE AURIS COMPANY, Room 405-F, 141 W. 40th St., New York City. If the Auris does not make you hear, return it and you will not be charged one cent. * — quickly cleared of i , Pimples, Blackhead : +o Diackheads, «- Acne Eruptions on the face or body, Enlarged Pores, TRY IT A FULL WEEK FREE Oily or Shiny Skin. $1,000.00 Cold od Cash says | can clear your skin of the Any Style or Design for Men WRITE TODAY for ty ww: SW EAT ERS Women, Boys, Schools, Clubs, Teams ene mt a a after Order direct from mill. Save 20% to 30%. Any style, color or wing " cu da — size, from stock or to order. Finest virgin wool. Send now for free being afflicted for fifteen yea catalog of big bargains. Special offers to schools, clubs, teams, E.S.GIVENS, 129 Chemical Bidg., Kansas City, Mo. AMERICAN KNITTING MILLS, 1538 Clybourn Ave., Dep!. 40, CHICAGO myself, I wouldnt have the assur- “If I hadn't been ail through it E Those who wear them say: RICKSON LEGS are Wonderful ance to sav tO because they do not chafe, overheat or draw end of stump. girentenlll tf you have had a recent ampu' SKS new booklet on TEST LEGS f reine tl — E. H. ERICKSON ¢ 0. | - : 38-A Washington Av. N-* d X * —— | AY a ae - MINNEAPOLIS

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Genuine uine KEYSTONE MOVIEGRAPH (PATENTED) SHOWS BIG SIZE MOVING PICTURES sate tor $4295 Non-inflammable Safety Films the Home Reel of Tom Mix Given FREE »wing reels are only a few in the film catalogue, genuine, posed by the actors themselves. The film is the same size as used in the theatre. Charlie Chaplin in “Making Pies” Wm. S, Hart in**WesternTrain Robbery” Tom Mix in “The Battle on Horseback” Also Slides, qopewing Slides, Theatre ckets, etc., included. - — E vecw live boy should have Machine Ee: - eT at home or club a Keystone and Reel < Moviegraph that shows z pictures the same asin the movies with powerful French lenses and con- structed along professional lines. The electric cord is included for connecting to any lam socket your electric bulb will fit. Can also be had for any Dry Cell Batteries for the home without electricity. Nothing to get out of order. Nocom- plicated parts. We have the largest comedy film service in ' the country for home machines. Size of machine all set up is’ 10 by 8°. Weight 3 Ibs. Send Money Order or eheck. Guaranteed to give good big pictures or your money back. Reference American Trust Co., Boston Maas. Order your machine today in time for Christmas tun! $0.95 eempiete, LIBBEY & NICHOLS prepaidin U.S, Geunine Dept. P A eee 100 Boylston St., Rm. 630, Boston, Mass.

AGENTS 323%: y Napa GOLD LEAF LETTERS guaranteed to never tarnish. Anyone can put them on stores and office windows. Enormous demand, le arge profits. Paul Clark says: Smallest day $28.70. R. Reel made $920 in two months. Write today for ‘Sa »e sample and liberal offer to general agents. METALLIC LETTER CO., 433-B N. Clark St, CHICAGO

Write today for offer. $8.00 a day rs ah TOURING CAR Buick touring car if you make good. Demonstrate and take orders for Comer All-Weather Raincoats. Permanent, high-grade business. Largest com- pany of its kind in the world. No ex- perience required. We furnish complete outfit and instructions. Write now. Comer Mig. Co., Dept. BW-5101, Dayton, O.

MINT VENDING MACHINE Pays $10 to $20 Day Profit Pays Rent for Store Owner one in your store or any place and get this easy Requires no attention. 8 works. Machine's profits erent. Write us about re- enny and nickel machines. ed like new. In excellent £ order. Pay their cost in or wire today for full par- $25down payment. Bal- O.D. Export orders full payment Mints $15 per 000 5 cent packages —— 100 5 cent packages, 1.50. sii VER KING NOVELTY CO. | 400 W Williams Bldg. Indianapolis, Ind.

— BROS.& CO. 858 J The Best Christmas Gift AWWW of All—A Diamond Ring bk) BA Buy of LOFTIS, the Direct Importer. Our Diamonds are exquisitely beautiful, high- grade, QUALITY gems, Blue Whi hite, of dazzling brilliancy—the finest offe rings of the European Dia- mond markets. Personally selected by our expert Diamond buyers. We invite comparison of quality and prices Send for Catalog Over 2,000 illustrations of Dia- DB mond-set Jewelry, Watches, Wrist Watches, earls, Mesh — Bags, Silverware, etc. Sent prepaid for your FREE EXAMINATION TERMS: Goods delivered on ® first payment of one-tenth of purchase price; balance in equal amounts, payable weekly, semi- monthly or monthly, at your convenience. Satisfaction Guaranteed or Money Retunded (Ee Cash or Credit WRIST WATCH No.49—Solid18-k White id, 17 Jewels, $40. livered on first pay- ment of $4.00, then 17-Jewel Elgin } ease -~ Years | OF TIS 8 NATIONAL JEWELERS DEPT. 108 N. State St., Chisene. Ill. Stores in Leading Cities Send for Christmas Catalog today Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION The wonderful § 4, njo ‘ Most mene it easy $060- ts with the human y Poned Brant ce Sify cure your Saxo- brings it! Balance £4 phone, Trumpet, Cor- 10 months. 97 net, Banjo or any other musical instrument at once Don't Wait! Small down ¥ payment, balance in re Ideal for home-made _ phonographs, & amounts you won't miss. «> . . Vy, . Learn to play, start a experimental purposes and combina- P band or orchestra, tion phonograph-radio sects. =r We have 127 small motors which are greatl under-priced for quick clearance. You will like new, price fess than never again equal this low price, when this exegiged taetremante, pomp halt. Our satalog Bets \4 lot is sold. ‘ and bargains in rebuilt instruments, This one only “50 ) They are universal motors, 110 volts, 60 cycle 10 Months to| Get This single phase, complete with turntable, cord Pay? S200 Musi: | Book Quick! and socket for immediate use. 1400 R. P. M. 19 years. Deal with reli- | Easy payments on Motor has 1" pulley with flange for yn flat = _ ae snouts. Supetion, ~4 beit. Housed in highly polished, nickel- mg - Get thie. mi =~ plated shell. ! | «,, STANDARD “music co., Dept. 2222. Don’t lose out on this remarkable offer. Order 214 So. CHICAGO your motor today. Tomorrow may be too : late. DO IT NOW! Price, $10.00 f. o. b. Steger, Illinois. - Clarinet ° Slightly used. rebuilt

Industrial Division “In Your Home . Our marvelous, practical Movie Steger & Sons Piano Manufacturing Company - Machines sell as low as $3.75 postpaid, . y itdi CHICAGO, KLI and use same size film as big theatres. We ulso stmsatnnndstitinncttbeiss -—s = named have wonderful films at lowest prices—with a 5 A haem ge m- new film exchange service. Don’t Miss This! Write NOW for Free gg ll PARAMOUNT MFG. COMPANY ,..0°°* 2 [aAGENTS—100% PROFIT B di fr ou newly paeemtet elec ertoal Qcceasorienymaling bis Pesos = te necessit y me. Send on! c RANG ES mt irect from fac ah the sample ona full det be gy he convince yourself 75 tory! Save Y% to 4% We gladly return — money as soon as you show us business 2 on our stove, range —or, if you don't like our pepentes. ¢ return the sample and Tak you will get your money back. You can't . Don’t pass this by. Write now. or furnace. Take ad- THE LYMAN ELECTRICAL MFG. CO. vantage of the big- Flatiron Building Arey w gest SALE in our 24 years. wr y | » Kalamazoo quality is the - — FEE | CPRICE 5 meet) hichest; qm Jan SEARCH LICHT ) <7 $9.75 pric es } d i ah” an A POSTAGE PAID are at bedrock. This 1S , ; q Fowertal Laas —y, Carbide Head Light. Bull’s Eye «Type, with with Tory floor s hose and Generator to wear on is in use « the year to buy. Send for BM - 1s world. ideal for'h hunting. trapping, fishing or any outdoor use. Order yours : our big, new catalog— ain f BRILLIANT SEARCH .IGHT MFG. CO., S08 South Dearborn Street, Dept. P, CHICAGO, (Ls it’s full of & ; A ccw ideas, ; EXCEPTIONAL BARGAIN ‘7*

new fea- : me teres, new ints ve Time oe modeis. ents om Watch. athe - — bergaine in jones on ” — engraved case, 10 jewel Lever gas ranges, combination ranges, Cc movement, adjusted and reg- ranges, furnaces, both be age, pipe- ulated stem wind and less, and household g Cash or set. Regular $15.00 easy payments. 30 days’ trial. po pa yr a — Money-back quarentes. | ick, safe f/f cre, FREE a handsome delivery. 530,000 pleased customers. : 14 kt. gold peinn . mar chain and knife Pits S042 veo nics PFT os orice promot Pay postman on airiv- KALA AZOO TO co. 4 : al. Satisfaction guaran- 400 as s VE . ‘ : teed or moneyrefunded. \ Rochester Avenue Watch set in handsome =\\" KALAMAZOO, MICHIGAN . F “ velvet lined gift case. Order today. : A Kalamazeo ~ES SUPREME iste Direct to You”

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W:L:Douglas ‘SD. °6,°7 & °8 SHOES BOYS AT $4.50 & $5.00 Women of fashion should know that our women’s shoes are high-class, made in the most distinctive, up-to-date and exclusive — which appeal to those who desire stylish, comfortable and serviceable shoes ray reasonable prices.

Tan Oxford ' ce ee AY 1G >A , 4 French Toe ee W.LDOUGLAS PEccine | & — fata e pattern in Smart style in light iacalf with SHOES AT 7 YEARS OFAGE Russia calf at e popular Welt, $6.50 price, $6.00 WEAR W. L. DOUGLAS SHOES AND SAVE MONEY FOR 38 YEARS, W. L. Douglas’ name and portrait have stood for quality, for economy and for satisfactory service. W. L. Douglas shoes are exceptionally good values. Only by wearing them can you appreciate their superior qualities. The exclusive, smart models, designed especially for young men and women, are leaders everywhere. W. L. DOUGLAS $7.00 SHOES are remarkably good value. Seldom have you had the opportunity to buy such high-grade shoes at this popular price. Shoes of equal quality, comfort and service are rarely found in other makes at our prices. WHEREVER YOU LIVE, demand W. L. Douglas shoes. They are sold in 120 of our stores in the principal cities and by over 5,000 shoe dealers. For economy and dependable value, wear shoes that have W. L. Douglas’ name and the retail price stamped on the soles. The stamped price guar- antees the value. If not for sale in your vicinity, write for catalog. Q_ W. L. Douglas Shoe Company, 128 Spark St., Brockton, Mass. A To refill your “MODERN” BUILD YOUR OWN YJ WANTED DuBLI CATOR TR. AY with \ 5 HONO GRAPH | tray to us today. No charge except for necessary material WITH OURHELP—SAVEHALF ] | Durkin, Reeves & Co. Ssowav, pans Rad Choraleon Aristocrats are unexcelled. Play any record. Finest motor, tone arm, case materials, blueprint, fullinstructionsat LOW §| Al COST. Write for catalog and FREE Blueprint offer : AN Choraleon Phonograph &Radio Co. 1224-ist St., Elkhart, Ind. TA HO U T IN 2a HOUT SALESMEN = eae cod on ay be past reed wind i Salesmen wanted to sell Chase Furwove Motor - Coats in every city and town in the United be ued , States. A splendid opportunity for salesmen SPSMEE) bands and dance orchestras. Veo ki ; play the Jezz-Bo seeking a proposition which will net $60.00 to minute it arrives. (No knowledge $150.00 per week. For particulars, write to The gons or long months of prac von af Owen Company, 99 Chauncy St., Boston, Mass. FREE: hem | Name EAT Val 3 the new low price of Int aid inGol Id NEVE! SOLD FOR LESS

pie (x | yj hy = our wonderful ise of $5.96, rou jing = to actx _—, play popular Jazz the first take this handsome ——} ‘- your Phands. Entertain others and be the envied center of attrac- tion wherever FREE *<": Send today = thee 2 you wm y Metho 30 pieces ), =¢f/ = YOUR NAME HERE = — | THE PERFECT WRITING: INSTRUMENT en $5.98 pion fw posal pt TheNew Im Writes like pencil with on delivery, If you are not sat- H ink better than good } ished just gana it back and year fountain pens. Won't ars. . = money will be imm nediately refunded lot, serateh, leak, clog or soil hands. Makes under the terms of our legal money carbons es: kt. gold ie ey ‘i fine lead —, Guaaten. se, sever offer i _Doint ‘anteed. ONEY. ; a $1, plus postage. Agents wanted. ~~ é C.F. JOHNSON na68. "Dept. M200 INKOGRAPH CO., inc., 163-C Centre St., New York 19 W. Jackson Bivd CHICAGO U f

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150 Make This 30 Minute Tes POPULAR MECHANICS HERE is an opportunity for to prove to yourself that the new York Saxophone is the easiest of all instruments to play. Send no money. Simply take advantage of our offer. You will get the surprise of your life when you have played it 30 minutes. Many play popular music in a few days. Why not? The York blows easily—fingering is almost as simple as the piano keyboard. EASY PAYMENTS Why not give yourself this opportunity to make spare time money, to increase your popularity or even enter the pleasant money-making musical profession? If you decide to keep the Saxophone you have nearly a year to pay, under the easy York Plan. This also applies to any other York instrument. Mail coupon immediately for interesting cat- alog and full particulars. J. W. YORK & SONS Dept. 124-L Grand Rapids, Mich. J. W. YORK & SONS, Dept. 124-L, Grand Rapids, Mich. Please mail without cost or obligation your beautifully illustrated literature and Free Trial Easy Payment Offer. ADVERTISING SECTION BE YOUR OWN FIXER WITH SMOOTH-ON No.1 —and save your repair money for bigger things. Cracked heating boilers, radiators,water pipes, tanks, leaky ovens, furnaces, stove pipes, loose handles, leaky automobile radiators, hose connections, gas tanks, cracked water jackets and gear cases, loose nuts, grease cups and hub caps are usually a snap to repair with Smooth-0: No. 1—and with a saving of any- where from 25c to $25 each tim Get a 6-oz., 1-lb., 5-Ib., or Ib. can of Smooth-On (from a live. supply store) and you'll find that, for the few cents you'll save many dollars. Get this Booklet Free spent The repair booklet which we send free if you mention thi magazine, will help you to get good results. SMOOTH-ON MFG. CO. Dept. 37,574 Communipaw Ave. JERSEY CITY, N. J. SMOOTH-ON REPAIR BOOK mens tet “Ye e BURNERS make your old kerosene lamps and lan- terns give a brilliant white light better than electricity or gas. Doublee your light. Saves oil. NO MANTLE TO BREAK. Guaranteed Safe and Reliable. Delig every user. Send now for complete eampie ‘id otemee « , x coin. rs. éd Selling Two Shirts ,. For the Price of one sides This means double the wear of any ordinary shirt. You are really es shirts for the price of one! Frank Cherne, Duluth, Mira oan veqpeal or bes ter hus success Pay Advanced -t We Deliver shirts ever conceived. Fifty new Joh s Get our new box our Opportuhity” end our unusually liberal proposition to vide WALTON - DUPLEX CO, 626 Brooks Bidg. Chieage, iL or more. 9 out of 10 Make $10 to $20 women buy. Fro daily selling Quickly. Sells for 50c. and Scissors PREMIER MFG. CO. Sharpeners. The Walton-Duplex Shirt is reversible—exactly the same on both made $26.48 in commissions the frst day. $625 in 40 days. You Build up a big wnmediate income ing the greatest development in salesmen. Write AT ONCE. AGENTS 2 2002Fn0nt 4 duces keen ecdge Premier Knife Dept. 29, DETROIT, MICH. MAHER & GROSH Co., 106 A St., Toledo, Ohio Direct at Factory Prices This $2 KNIFE $1.18 Posty - Hand Forged Razor Stee! Blac Handy shaped Blade mak¢ knife best for mechanics, spo and farmers; light but stro sharpened easily. Stag han: man silver finish; blades file hand forged from razor &t warranted. Sample $1.18 Send for our 100-page List and “HOW TO USE A RAZOR’ 3 for $3.00 Po REE

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ices Postpaid Blades kes

Ohio POPULAR MECHANICS ADVERTISING SECTION OR more than 50 years Spencerian Per- sonal Steel Pens have been the standard of the world’s writers. 50 different styles and sizes to choose from—fine, medium, stub or dome pointed. One that best fits your taste and hand- writing is here. Seven hand processes and spe- cial Spencerian steel make these the smooth- est writing, longest last- ing pens that you can possibly buy. Mail 10 cents to-day jor 10 sample pens and intere sting free booklet, “What your handu witing reveals.’ SPENCERIAN PEN Co. Silvered Falcon. 349 Broadway New York Spencerian Personal Steel Pens Beautiful HOUSES $ and BUNGALOWS 900 CAN BE BUILT FOR nd many others in my new book, g Plans tor Modern Homes, will save ireds of dollars. One of the most e andcomprehensive books of plans 4 shed by any architect. Newedi- & - st off the press. Nearly 500 floor plans t ographs of bungalows, Cx a FREDERICK H. COWING etc., costing from §200 up; 5 ARCHITECT st to build. Sent postpaid for $ 00. 101 Tremont St., BOSTON MASS.

Self-Filler DE LUXE Stylo Pen “INDEPENDENT” All the best features of a Fountpeu. Lasts longer a smoother. Improves Ar dwriting « Eliminates fatigue, GUARAN'IEED Gold Point, doin = > <4 7 Rubber Folder, r. 7 ever Filler. Poeket Clip. —S ae Your Name in Gold Inlay, 25c. rite for Pen Catalog. Agents Wanted, ', C. Ullrich & Co., 161 Washington St., New York Anown the World Over for 40 Years

Just Wear This Beautiful yay FREE — and Make Big Money in Your Spare Time nt to give youa FREE Cap. I know your friends will be delis chted with iteclass, style and fit and you'll make a generous profit taking their orders These caps are genuine hand tailored. made to individ: nal measure. Nine out of ten men will order right Sig profit on every sal A DAY EASY FOR YOU Send Name Quick—No Money i made $58 in one week, Hampton made $7.65 in four hours. Schmidt sealary from $35 a week to almost $75! And you can do every bit as i ur_name right away and I'll tell you how vo make $10 a day. also sylor Cap for your use. Write at once. J. W. Taylor, Pree., Taylor Cap t. &.W Cincinnati, Ohios away

The New Yankee $1.75 Dependable, as always, but with many new features of grace and beaut y. With Radi- olite dial that tells time in the dark, $2.75.

Waterbury Gold-filled $9.50 4 jewels; stylish 12-size. Very modern green or white 14-k gold-filled case. Scratch dial. A handsome gift watch.

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A Kit of Twenty High Grade Tools! W: ATCH Dad’s eyes gleam when he opens it Christ mas morning. A welcome, practical gift for any man! Twenty glistening, high grade tools, enough for most repairs and odd jobs, in a handy canvas case. This kit is made by the world’s largest producers of tool kits. Specially priced at $7.00. Carton is wrapped in fancy holiday paper. Other popular Tool Kits, all of Vichek guaranteed quality: No. 900 Mechanician Kit oeee--920.00 No. 902 Motorist Kit No. 903 Garage K No. 908 Taxi Kit No. 909 Little Roadster Kit If your dealer hasn't them tell us his name, enclosing correct amount and we will see that you are supplied. The Vichek Tool Company 3001 East 87th Street Cleveland, Ohio EASY TO SAY VELCHEK

VLCHEK TOOLS It isthe well known quality of CRESCENT machines that justifies you in selecting one of om each tne you have need for ood working machinery. The c RESCENT line is better than ever and will always give you satisfaction in every particular. Ask today for catalog of band saws, saw tables, jointers, shapers, planers, borers, planers and matchers, swing saws. disk grinder, cut off table, hollow chisel mortiser, variety wood work- er, Universa! wood workers. THE CRESCENT MACHINE CO., 93 Columbia Street, Leetonia, Ohio

Works fast. Slides in ane out quickly. Dur- ably made of brass MASTER SLIDE RULE trimmed boxwood. Takes accurate inside or ane length 2 to8 feet, e cen ver Lineal foo Outside measurements 5 wi si dectcr's, sent posiond. MASTER RULE MFG. CO., 841-43 E. 136th St., New York ——o ers and Agents:

TURN WASTED TIME INTO MONEY! Every Purchaser Finds Numerous Uses for the Torit Acetylene Torch on 13 Uses Acetylene only. No oxygen Or aif pres- sure is required. Five suck in air Simply connect to Presto auto tank, light gas, and the outfit is put to work, Beats anything you ever ——ieeay tried for soldering, heating or light brazing. tfit consists of 4 tips for different kinds of work, soldering copper, 5 feet tubing, tank connection, and full instructions. ST. PAUL WELDING & MFG.CO., 17711”. 9rd St., St. Paul, Minn.

The “American Universal” SURFACING FLOORS says Brooks, Okla ‘My profits run from $35.00 to $50.00 a day and I have cleared as high as $180.00 in 17 hours,”’ says Gese king, Til. “I make at least $20.00 a day,”’ says Phillips, Ohio. “1 have made $30.00 in 8 hours,” says Waynick, Texas. Hundreds of other fellows who have become ‘ ‘American Universal’’ Floor Surfacing Contractors, are doing as well, some even better More Good Men Needed The field is unlimited, the demand for “American Universal” work tremendo pus im Villages, towns and cities the country over avery new floor must be surfaced, every old floor represents 8 ccatien ot ‘ ob. “American Universal” (electrically driven loor Surfacing Machine does work of six hand ecrapers, earns six men's pay. Work is pleasant, interesting, requires no experience, nc > special training. Small amount starts you Here's Your Big tunity to get into something for yourself, be your own | and make real money. We help you | get started, show you how and where to get work. furnish office formes stationery edvertising, everys thing you need It's the big chance you've been belie or opportunity The American Floor Surfacing Machine Company : 523 S. Saint , re = Clair Street —— TOLEDO,

alog. AGerstacr iden. 412 Columbia St., DAYTON, ten 10

BURN YOUR NAME ON re with ARKOGRAF Protect your tools from theft. Write any name, engrave any design on metal with electricity like writing with pen or pencil. Complete 3.50, prepaid anywhere. Interest- reular free Vrite today. Arkograt Pen Company ‘171 East Stark St. Portiend, Oregon

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For your home shop! PARKS Cabinet Shop Special $2250 with all attachments and motor

Here's an all-round woodworker for the small shop. Sturdy, fast and true. The biggest little woodworker ever built. Saw table has 8-in. rip and cross-cut saw, and 4-in. jointer and borer. You can choose from these extra attachments: band saw; shaper; sander; lathe; and motor. nd for Bulletin C-S and complete Parks catalog The Parks Ball Bearing Machine Company s.i80 Kevin ss moms ove | | T'S Going to be a | Crescent Kit Christmas Fo ai man—from fifteen

to fifty, and beyond-— P 5 8 L I O D | who ever has occasion to Tool Cases Excel | touch an automobile, motor- Machinists, Tool Makers and Car- 2 : penters find them most satisfactory cy cle, motorboat, to tinker Eierimceritea'™ || about his own workshop, te THE PILLIOD LUMBER CO. jobs of repairing about Dept. 1 Swanton, Ohio the house or on farm machin- ery, will be tickled to get this handy kit of genuine Cres- cent tools.

Be your own repairman. Myers’ wonderful Sewing Awl sews leather, canvas, shoes, mends harness wagon covers, auto tops, blankets, belts — anything Eight-inch wrench, six-inch heavy or light. Speedy hand stitching. Can’t get out der. O and yith diamon< full 1 “ crooved moiety procaine thrent Sones pt trtore. pliers, and Crescent all-steel A. BIG MONEY FOR AGENTS So wees ~ T-type screwdriver. All cov- <a anmmnnenrans . : ered by the Crescent guarantee NOW! New Low Engine Prices of satisfaction. In attractive Only $569 94 holiday box, at hardware or Pil eS AA | accessory stores, $2.35. &month fora few months 0": N ~easy toown the famous standard WITTE En- teen ers | CRESCENT TOOL Gas. Equipped with celebrated Troublepreof P Y WICO Magneto. Simplest and cheapest to op- COM AN erate. New device makes starting coer 60% surplus FREE BIG NEW Bod direct trom factory to you 00 r ENGINE BOOK MINET™. Dave’ nat AY 210 Harrison St., Jamestown, N. Y. Write today for my new illustrated engine book—sent absolutely Free. No obligation to you. Originators of the Crescent Wrench WITTE ENGINE WORKS 1742 Witte Building, - - - KANSAS cI(ty, mo. 1742 Empire Building, - - PITTSBURGH, PA, .

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POPULAR MECHANICS ADVERTISING SECTION

Start every work day—or play day with a pair of Ber- nards (No. 102) at your fin- ger tips. You'll find a dozen uses for them. They grip like a vise because of the parallel jaws. The outside cutting blades bite cleanly through metal. They are great for bending or stretch- ing wire. Insist upon

‘BERNARD Standard High-Power Cutting PLIERS No. 502 “‘Vulcan” Side No. 454 “‘ideal’’ Long Nose Cutting oe wey d Pliers Catalog “‘P”’ free on request | wM. SCHOLLHORN CO., NEW HAVEN, CONN.

.. for his Christmas The Simore Screwdriver or Combina- tion Knife and Screwdriver make an ideal gift for the man or boy. Model No. 11 has three screwdriver blades; No. 12 has a fine knife blade and two screwdriver blades — both unusually useful and beautiful tools — blued steel* handles—best steel in blades. They look the part of a real gift for the boy or man who likes tools—try one ona friend of yours and watch him register joy. He'll do it, too. Model No 11 only $1.50, and No 12 for $1.80. end me rde r or ¥¢ ur check and we will mail po - pre J at once. Eac tool guaranteed — your m a ref saded if not satisfactory Dealers are requested to write for our new price list on these tools and the Simore Automatic Trysquare. Boost Simore tools for Christmas. THE SIMON & SKIDMORE MFG. CO. Dept. 4-12 SANTA ANA, CALIFORNIA The Tools That are Different

White Gold Wrist Watch 25 year 14K white gold-filled case, richly engraved, latest Tonneau shape, sapphire crown, gros grain ribbon with whit: ‘old — clasp. 6 jewel movement. An excellent timekeeper. beautiful velvet and silk-lined case, AN IDEAL GIFT that will make any girl or woman happy. We spec ialize in t watch exclusively and are in a position to ee lower than the usual wholesale price. If after rec " ae this watch, you do not consider it eq: mal to a tch steed ee Dp to $20.00 by jewelers, send it back —w promptly + und amount paid. Send only $5.45 and this t iful watch will be forwarded prepaid, or Ed you de will ship C.O. D., you to bo pay postman $5.45 plus 18¢ charg on delivery, der no is offer may not be repeated WILLIAMS CO., 4750-10 N. Sheridan Road, Chicago

Stans for HOMES| Let these books be your tiful California Styles penne fer an mate home ‘South - West Stuce oHomes 8p anish, English, some 2 ‘All-American Homes 50 Houses—7 to 10 Ro $ “The New Cc otonis als 60 Houses—S to 10 **West Coast Lhe ak 50 Housee—6 and 7 R SPECIAL OFFER: Send $2.50 for any three of these books and get Garage Folder FREE, “Little Bungalow: Money back if not satisfied. 75 Housee—3-4-5 R ; E. W. STILLWELL & COMPANY, Architects, 123 California Bldg., Los Angeles

Do Your PRINTING ards, stationery, circulars, labels, paper. Presses $12 a Card and paper cutters $3 up. Save money, Big profit printing for others in spare time. Easy with our printed rules. Write for catalog presses. type, cards, paper, etc, THE PRESS CO., R-37, MERIDEN CONN

Earn $500 a Month With New Gasoline Tonic Distributors coining money selling Gasoline Fuelizer already realizes that gasoline alone is not complete of dollars worth of advertising has convinced the motorists already using some kind of fuel tonics fortune selling Hutch Olene—-the only real scientific f Eliminates carbon—ends carbon knock—cuts down pac. Se! ~ s8>

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POPULAR MECHANICS ADVERTISING SECTION » Oe er a SO oe 2.@-ere Dee en bon on Oromia ee = SAWS AS MUCH AS 10 MEN! i One man, now, can saw 15 or more cords of wood each day with the OTTAWA Log Saw. No more back-breaking work with a cross-cut saw; no more lugging ws to a cireular saw, for it’s easy to take this power saw to the wood. Over 96.000 in use. Thousands making big money sawing wood for neighbors and to sell. Coal is high and may be igher—wood is in good de- 4 e | nand for fuel. Send your TT. name on a post card today for OTTAWA AWA a in} ul ee particulars about the — i—Cuts Down ee La ba sawing; easier moved — Trees 4—Doece Beit [OG SAW tart in any weather. 4 2—Saws Logs Work som ne Engine—you need * power. Shipped avick Get Big Special Factory-to-User Offer! rest to you of nine branch 4 SSIS py, > SSS, ————, UME jpg, “Y —— = NV ANWR eha tt Ei rg, — Send at once for big 32-page Free Book telling all about this remarkable one-man outfit Let me show you how it will save you all hard work, provide cheap fuel for yourself and to sell, and pay back its cost in a short time. Cash or Easy Terms. 30 Day Tria 10 Year Guarantee e Send your name and address on a post card, Write today. OTTAWA MFG. CO. 1742-M Wood St., Ottawa, Kans. Room 1742-M Magee Bidg. Pittsburgh, Pa. SSS SS oS SS ——

SALESMEN — DISTRIBUTORS to use and introduce attachment that makes Fords run on 94% air. THER- MOSTAT on exhaust “automatic ally turns down needle valve as en- gine warms, exactly as Ford Manual says do by hand. | Makes Fords start easier winter | or summer—saves half gas and Make Your Ford a Closed Car! oil—cuts repair bills one-half eliminates carbon forma- mo weather-proof sections will change your 1923-1924 Ford a ng or Roadster, into classy limousine-style closed car. oll. Installed ypen from outside. Sliding front panels for ventilation. in two min- ply, double covered veneer frames. Color matches . your top. Easily, quickly installed. Guaranteed. Low priced. Fine for bad weather. Write for prices. BUOB & SCHEU, Dept.A-8, 216 Webster St., Cincinnati, 0. h : i © Seis Cadillac on sigt <0 ~ now Uses aS s AGENTS , Oo wwevers R Ford owner as standard WANTED ff oF cers owns ae TE sontert, 4? co him a $100 bill. be- Thermo- Use and Introduce MELLINGER CORD TIRES FS cause it saves $100 static Care 12.000 MILES GUARANTEED oe oe every 10,000 miles aoa ’ Lowest Wholesale Prices in 4 ay | You can make Kie Money selling Control America. Shipped prepaid on approval. Make big 1a) this wontertat proren Saves, nck under . B 7 °nce } » yeTIence ho necessary ancke Blanch » a ul or part time. No capital or experience , ae Ro eek tees ecane aamtedl Ge oan - _—n eccsiome furnished. iness of your own that makes you fron iceé ° $250 to $2,000 a month profit YOUR TIRES FREE! pm ~— I Write jor free circulars Now! for v nate FREE BOOK. tells how thousands have NW Cc BLANCKE & co | A. 2 . ) em nto big bu PECIAL AGENTS’ OFFER Wholesale f \ . Dept. 764, 602 W. Lake St., Chicage reteand FREE SAMPLE KIT. Life-Size $ 40 — °o

Gr. 600,000 Capital THIS Easy-to-Understand instructions Fam it Reed: Nfo-cise atterns and ~ life-size for each of the body so you ; — at Red trueti ctions show : can’ Roo uesun ale ture instructions and and Teil Delivered Pest, be nce meee convert ‘Your Ford into this CONICAL DISK WHEEL PATTERNS a aucy ee as thousands have done,with Only $6.40 delivered. Order new while we can make Loos Dtaine materials. No need to lay up the car. ood delivery and really enjoy these wonderful days OK AT WILFRED ENO’S -Eno says, ** 7: in your **Pat. V Keen, Classy. Up-to-the-minu ite. You m = © < 7] ond ~ yh it. 1, Bon’ S tosttate. Ss Sut Lo * Undersiing hg bene cutti hear them say, ‘He bw y $6.89. Send 5c coin for new manual o — sport car’ I never cut any steel ot. ther distinctive eport body patterns from $3.80 up To, coodwork before but one can't go wrong with Swing-Lo” Irons,’ Jiffy’ Tepe T patterns.” (Overland City) St. Lows, Me. and **Goeum'’ Windshe ide. Order Right Now he “Pal” with pressed metal rear, K 1 Co., 55 Kuempel Bidg., Guttenberg, lows ELLINGER TIRE & RUBBER CO. YOUR A Wis SPORT CAR—SAVE 550 to 5150 wien EOS Aut piscine

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POPULAR MECHANICS ADVERTISING SECTION ( 9 World 8 : puncture-proof e . inner tube has beenin- \ Best Roofing at Factory Price vented by a Mr. M.E. Mil Don’t buy Roofing of any kind until you get our big Free Roof: burn of Chicago. In actual test it ing Book, describing full line of Edwards Famous ‘‘Tightcote” was punctured 500 times without the loss Galvanized Roofings, Sidings and Ceilings, and our lowest fac- of air. This wonderful new tube increases tory prices. Then see for yourself how much we save you by } mileage f. i selling direct and saving you all in-between dealers’ profits. rm ll Rvs we i — FDWARDS “REO” i Uf more o- the ordinary tube. Mr. Milburn / wants them introduced everywhere and is Metal Shingles | making a special offer to agents. — Abeolotely rust proof. By our patented “*Tightcote’’ process, y Write Sales Manager, S. T. Hansen, \ } edges as well as sides of metal sheets are heavily coated with zine— 336 West 47th St., Chicago y , not a space the size of a pin point exposed to weather. Fire and LN ad lightning proof. Outlasts three ordinary roofs. Forever wind and \ AYSLE OU RA -PUNCTSRR_VWQVERN VE weather proof. Need no repairs—end all roofing expense. Patent \ A nent DEVICE es water tight seams—all nail heads covered : ee = —— —no chance for rust or leaks. . : me SETS—AUTO BODIES ing can be Seats Sutetos or struck b lightning, an e galvanizing : wa SEND FOR TH not crack or flake. Bend it or ham- ‘ ne: INTERNATIONA mer it—you can’t loosen or scale the \ | siting, : CATALOG ————- Noother galvanized roof- ; ‘ * ng can withstand this test, ‘ e ‘ ar nat price 3 ne of Rad Low Priced Garages \ - auto bodies Wide variety of styles, al) sizes of Portable Fireproof, - : at Wholesale Prices ‘etal Garages. Lowest prices ever made. Postal = ly pave big m + Big Garage Catalog . ing direct fron Write Today 1 tre, eamplee and proof that we A af oF og INTERNATIONAL BODY WORKS, 914 W. Ohio Street, Dept. 7, CHICAGO, | of siding or ceiling you may peed. Ask . A = ania Samples & ” — eee ure. 60. Bn RECOVERIT $3.85 YOURSELF AND UP Make your car look like Custom Made new and save abig labor bill. We have been making top recoverings, side curtains and seat covers for 15 years. We have patterns for all makes, p mode! too old forus. Easy to apply, simple instructions given Write for our big money saving catalogue with samples. THE LIBERTY TOP & TIRE COMPANY, Dept. E-7 Cincinnati, Ohio SHAW MOTOR ATTACHMENT | ' MAKES YOUR BIKE A MOTORCYCLE! A high grade 2% H.P. motor attachment quickly clamp: | any bike frame. Speed 4 to 40 miles an hour. 90 to 125 miles, per gallon of gas. Special Low Price Now! Write today _ ; \ for Complete Description and Special / = . Low Prices on SHAW Motor Attachments ‘ +e . and the SHaw Complete Motorbicycle Seven brilliant, blue white, perfect- BN SHAW MANUFACTURING COMPANY \ ly cut diamonds are set in platinum. \ Dept. 37 Galesburg, Kansas ~ Looks | ike 2 ct. solitaire worth $600. = Fully guaranteed to stand any test. zt FREE Bargain Catalog! Let Absolutely Free—this great book w Hartman pages of amazing bargains in homef i i “a #4 Feather farm machinery, ete.—all on easy mor BGA) solid white cold engraved and Your Nest | and 30 day TREE TRIAL Send po ia°tp-Wis pierced ring to add beauty and style. ana canper \V., Vepl. vi), ** Just send $2.00 deposit to show your good faith (or pay postman $2.00 on delivery) and we will send this handsome diamond ring. (Men’s heavier ring, same price.) You can pay balance in ten small monthly tastelimonts of $6.75 each—total price, $69.00. Former price, $100. ALL CREDIT DEALINGS CONFIDENTIAL you tell them joursclt, “A writion guarentee socomipentee cosh on Gallon of Gasoline mae: You can return the ring within ten days if you are not satis- . Norifk. No delay. Makes a splendid present. ; | Starts ETSY at Zero PERFECT CUT DIAMONDS AT $197 A CARAT : ° . ane , Carat $25.00 | % Carat ‘ Guaranteed genuine with Air Friction Carbu % $49.28 1 ~~ ©@ blue white. Money . W : other cars near! $65.65 1% = 2 back guarantee cer- : present mileage, power and flexibility $73.78\;1\%. “ a tifleate. Pay 10% or any car, truck, tractor, marine or stationary engine. Makes $98.50!:2 o 5394.00 down, 10% a month. better than new. See our mileage guarantees. Ford ........34 mi. | Chevrolet ....32 mi. | Dodge WRITE FOR OUR NEW JEWELRY CATALOG Maxwell. . 30 mi. | Overland... ..32 mi. | Oekland It brings our large jewelry store right into your yr Mileage guarantee on any other car sent on request. i DAY! Prices. Easiest terms. Hest values. SEND FOR IT SENT ON 30 DAY’S TRIAL You can car in hea STERLING DIAMOND & WATCH co. without shifting gears. Starts off on high im any weather wi be Par importers—$1,000,000 Stock—Established 1879) ing or henting—-e jetking or choking, _ Agente Comte K ROW Dept. 1780 NEW YORK, N.Y. 1360 Raymond Building Dayton, Ohio,

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POPULAR MECHANICS ADVERTISING SECTION Boys, you yourselves ) can build this me “I built it Steam Shovel cs myself !”’ —and it works! this Shovel really works just like a big It's great fun to make it scoop up .d—then swing and dump its dipper. | you can build it yourself—with Mec- Then, when you're through with it, d a Skyscraper, Crane, Bridge — for ano is composed of real engineering ts in miniature with which you can easily ihundreds of models. Parts are strong and urately made and fit together perfectly. study is needed, for every Outfit has a big picture book that shows you just how to put odels together. For sale at most department, toy, hardware and sporting goods stores. Sent direct on receipt price if your dealer cannot supply you. Prices of outfits from $1.00 to $45.00. IMPORTAN1 NOTICE Not all construction toys are Meccano. Meccano is the original Steel Construction Toy, » o jas the greatest variety of parts and builds the Engineering for Boys most models. Insist on the genuine Meccano. This label is on every box dus your name and address wit This Book those of three of your chums and we , will send you free our new book Sent “The Magic Carpet,” which tell about Meccano and e joys of Mec- FREE an eae out No. 62 aft er

your own name MECCANO COMPANY, INC. Division H-2 ELIZABETH, N. J. In Canada; Meccano, Ltd., 45 Colborne St., To

| | gf] RELIABLE STANDARD MAKES ce yy can DEPEND on. Enjoy theglorious ence of going wherever you like—when- ulike, The price iswithin your means— to 50% leas thanothers. These machines are slightly used, thoroughly overhauled bz) Roll down the r veil on this jie new bi f orrebuilt. Send foreatalogue. &> dashing speedster—t wl poy whee t MYEROW BROS. AShing spec € 1e¢ € ’ wants. 15 Berkeley St. Boston, Mass. It's a BIACK. BEAUTY Shipped express prepaid—direct from factory D = ~ at wholesale price. Guaranteed 5 years. 6

: : months accident insurance. 30 days trial. for aa Btyi trial on approval. You can have your ; re Designed and built by Ole Evinrude Cars hnson Motor Wheels, Evans Power 1 ‘ ‘ Weighs less than 17 Ibs. per H. P. Cycles cles. Send for Free Bargain in Bulletin and - > ; < r ct re speed, yet ea Money Saving Message, listing hundreds of Bargainsin “3 , ee Se ae with at ete ees Pes sed rebuilt and new machines, supplies accessories,etc. - Trouble proof ¢ arbor erne ICAN MOTOR CYCLE CO. ; danger of tipping boat. The ideal family mot Dept 1227, S657 —— Avenue, CHICAGO « 4 carrying case withe st taking apart Writ e for atak ELTO OUTBOARD MOTOR COMPANY Manufacturers’ Home Bidg., Dept. AA, Milwaukee, Wis.

Direct from ur factory to wearer. Ne sold. "Ove r one million gat- La wearers. No capital orexperience required. Largesteady income. Many earn $100. to $150. weekly. Territory now being allotted. Write For Free Samples. Madison Shirt Mill, 511 B’way, New York

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POPULAR MECHANICS ADVERTISING SECTION SAVE 257%—SEND NO MONEY »\\ Genuine Diamonds—Cut Stones—No Chips —fE) | Snappy, White and Brilliant—Terms if Desired 4¢5;—s Tia Wedding Ring No. 6177 — 3-Stone Ladies’ oma t No. 2 $30 18-kt. : Diamond, 4/100 White Gold. 20-kt. White Gold of ring Our White Gold Looks and Wears Like ee Men’s Ring No. 6407 — 18-kt. Emblem or Initial Ring No. 6132— White Gok l qr ps and Green Go ld Solid Gold with Two 00. Dia- Shank. o— 4/100 $25.00 . of ring Jach No. 6132 has 14-kt. White Gold Fee with Gold Emblem or Initial inlaid in Genuine Hope Ruby or Black Onyx. Fur- nished in all lodge emblems and in all initials (Old English jor unspect Terms—Monthly Payments If Desired Send for Free Catalog BUFFALO JEWELRY MFG. CO. “The Mail-Order House” Dept. P, Brisbane Bidg., Buffalo, N. Y. ' 4 Send size of finger and ring desired will be sent ion ‘ oA 6407 This —e Reg guarantees you ger XM confident Information on how you can earn Mark ids. Trade line diamo Make $75.00 a week and up, selling our fine made-to-measure, all-wool suits, direct to wearer. Biggest values—positively sell on sight. Biggest commissions paid in advance. We attend to delivery and collections. 6x 9 swatch samples—over $300.00 or more a month will be sent to the first person in each locality who writes. Become our local distributor for a recognized household necessity in rural dis- tricts and small towns. Light, pleasant work. Men or women. Full or spare time. No money needed. A million dollar firm behind it. Write quick for par- ticulars and state terricory de- sired. N. kk. Johnson, 609 West Lake Street, Chicago, IIl. Lu Every Boy Needs Them To hang to the walls of his room his pictures, drawings or charts. MOORE PUSH-PINS Glass Heads — Steel Points Moore Push-less Hangers “* The Hanger with the Twist’”’ Easy to use; won't injure walls. 10c pkts. Everywhere MOORE PUSH-PIN CO., Philade!phia, Pa. 100stylesall one price—furnished FREE, Part or full time men write at once. W.Z.GIBSON, Inc., 161 W. Harrison St., Dept.M-1 Chicago | Make the Best CHOCOLATE BARS Mints and Chewing Gum. Be my agent. Ever) will buy from you. Write today. Free Samples MILTON GORDON, 407 Jackson St., Cincinnati, Ohio Relieve That Rheumatic Pain Apply Absorbine, Jr., prot whenever pain or discomfort 1 thre: itens Feel it ease tl at once in muscle and joint will find Absorbine, Jr clean, agreeable, and eff All druggists’, $1.25, or postpaid Liberal trial bottle, roc., post; W.F. YOUNG, INC 347 Lyman St., Springfield, Mas sins and pains Bruises Children's Sells for $1.25 SCREW CAP Z_NON-LEAKAB IDEAL CHRISTMAS GIF! Agent’ S Sample, 65C@—Comes IN HOLLY BOX ABSOLUTELY ewer PREVENTING TWISTING OF TU Neu Self-Filling Bamboo “1TS 7 THE POINT, Imported from Japan. “It makes Carbon Copies.”’ for quantity price list and distributing plans HAS EIGHT GROOVES FOR INK TO FEED Guaranteed for One Year. Money refunded if you don’t think it the best pen ~~ ever wrote with . SPORS & COMPANY, 335 Main Street, LESUEUR CENTER, MINNES ITA Fountain Pen with Stylo Point Hustlers Make $20.00 D Just Out! Comes in beautiful brown, trimmed in b!

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POPULAR MECHANICS Electric Light in Every Home No longer necessary toburn ker- osene lamps. The Cincinnati Electric Lighting Machine generate sufficient to light twenty-five Watt lamps at an average ost of one-third of city rates. STARTS and STOPS AUTOMATICALLY Operated by single cylinder, two cycle, air cooled engine. Has adjustable siphon valve and limiting governor to regulate rging of batteries. Neo carburetor—no gears—no push rods no valves to grind _ Simple, practical, fichly efficient and ical in fuel ex o portable—weight 120 pounds. table for homes, cottages, camps, motor boate, country echools and churches, Dealers and distributors wanted. Write y. THE E. 1. PEARSON CORPORATION, 2960 Jessamine St., CINCINNATI, OHIO, U.S. A. AMERICAN BOY SCROLL SAW It’s Easy to Build Things When You Use This Saw You will like its sturdy, me- ehanically correct construction; the ease of operation; the smooth, absolutely square cut. Cuts fibre, bakelite, wood up to 1” and metal up to 4” thick. real tool to make your radio sets, scooters, cabinets, experimental work and lots of useful things around the house, etc. Can be motor-driven An Ideal Xmas Gift for Your Boy IT’S A REGULAR TOOL And the Price Is Right To get complete details, write your name plainly on this ad, clip and mail to Delta Specialty Co. Sithaunes wis" MORE PROFITS To Dealers Who Buy Nationally Advertised Radio Goods from Our Bargain Catelog/ Write for It Today! AMERICAN RADIO ~\ CO. Dept. O Roh 12-2 Ua eC eae Ale) U 1 ti Mr. Brush Salesman ne Be am yl bitious, hustling men to sent an old established manufacturer of high grade, guar- ed, fastest selling line of Sanitary Twisted in Wire es, sold direct to the Home. We have openings for expe- ed brush men as managers in all territories. We want live energetic Go-Getters. We pay larger commissions than other Brush House in the Country. If you want to earn some real money, it will pay you to write us immediately lor our proposition. WIRE GRIP SANITARY BRUSH CORP., 15 MERCER STREET, NEW YORK CITY With Your IMPERIAL RANGE b been now for Direct from Factory Bargain Catalog and you will be in time to get this big 12-piece genuine heat-proof Glass Bake Set—a complete kitchen outfit FREE. It's our special limited offer to introduce Imperial Steel Ranges and their pat- ented money. fuel, work and time saving features Biggest money- saving opportunity of the year. Get low prices BARGAIN BOOK Seves you $20 to $40 on Ranges, Gas Stoves, ol! 8 . Refrigerators, Kitchen Cabinets Home needs at rock-bottom wholesale prices Easy Terms. Everything sent for 30 Days’ Trial. Our offers are sensation ef the year. Write quick 2 Just send name and address’ A poste rm will do America’s ve THE IMPERIAL STEEL RANGE C Greatest Value 469 Detroit Avenue Cleveland, Ohio ADVERTISING SECTION RMA BOAT ENGINES Let KERMATH Owners Tell the Story “Never spent a penny on it,”” says C. M. Weeks, who operates a marine 7 machine shop and depot at Babylon, N.Y. “It is number 519, bought about 13 years , 28°, and it is in good running condition today.” “TI have just returned from an 800 mile cruise,” writes F.S. Hall of the Genera! Electric Co., New York City. ‘The boat is perfect, the Kermath engine is perfect, and the trip was perfect For you also, a Kermath will live and work, long and hard, with never-failing dependability and rigid econom y—the results of a most modern design and painstaking manufacture There is a lot more to our interesting story —write for it. 3 H.P. to SOH. P., $135 to $1050, F. 0. B. Detroit KERMATH MANUFACTURING COMPANY 5886 Commonwealth Ave. Detroit, Mich, Canedian address: 11. Wellington St. Torento, Ontaric A Kermath Always Runs EE > KINS \ Band Instrusments HETHER you are just learning to play orare a finished musician you will find “King” Saxophones, Trumpets, Trombones and Horns, easier to play than any other make. Every“ King” Instrument has the latest improve- ments—is built by experts and is laboratory-tested be- fore being shipped. Every “King’”’ is fully guaranteed. Itis easy to own a‘*King” Instrument. They are sent on trial and sold on easy payments. “King” Band Instruments and Saxophones are fully described in beautifully illustrated catalogs. Send for free copy. Write for list of bargains in rebuilt instruments. THE H. N. WHITE CO. 5211-58 Superior Avenue, Cleveland, Ohio Please send me free, your latest catalog on - Instrument. Name Address City

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POPULAR MECHANICS ADVERTISING SECTION “That eas YIM TER EEE) Musical tof7//f FORDS euTy Pal of ON aa Mine” : MAKE BIG PROFITS WITH THIS Oo : COMBINED GAS GAUGE & FILLER Makes Fords as easy to fill as cars with tanks at rear. Unnecessary now to remove cushion or get out of car. Takes full flow from any pump without flooding. Has visible gas gauge, too, with lumi- nous indicator that SHINES AT NIC JHT Guaran- teed! asy to install—clamps into regular tank opening. Make big money selling the wonderful new Kirstin Fil-Gage Retails at $6. Easy seller! ‘Sold the first five Ford owners I called on,’ writes E. A. Bernier, Northampton, Mass. Exclusive territory. Full details sent free If you wish, send $6 (or $1 and pay $5 C.0).D.) for one Fil-Gage, leather ette + ing Case, and full supply ad g matter, sent on 10-day money- bec k ‘trial. Write today to address below Come On Boys— “Gonzo Let’s Hear You Play! There’s nothing like good music for happiness; and there’s nothing like a Hohner for good music. Millions of happy boys and girls are now playing Hohner Harmonicas for entertain- ment, popularity and education. Anyone can quickly learn to play a Hohner with the aid of the Free In- A. J. KIRSTIN CO. struction Book. Get a Hohner Har- 1201 ist St. Escanaba, Michigan monica today—50c up—and ask for the free book. If your dealer is out of copies, write M. Hohner, Inc., Dept. 181, New York City. If you want a musical treat ask to hear Vic- tor Record 19421, by Borrah Minevitch, OHNER ARMONICAS Thnil n un EV Ty Mi nute SPECIAL $6.19 Her uy li g F E e | 25 year 14 kt. L S6. filled pa —— \ Stamos shee, aco. G sewel m women. pegrain rawoa e gFoK ong jewe oO n en ear t With the New ¢ndian Scout Tree es cleel oe e eee ONLY Ge. 19 plas ise postage. ney refunded If not gett ed ets away as quick as a flash. Goes 60-75 miles “SUPREME JEWELRY MFG. CO. tote 1e gallon. Tires good for 10,000 to 15,000 miles. 434 BROADWAY Dept. ies NEW YORK CITY 100 pounds lighter than average motorcycles yet rful and perfectly balanced. 1925 Model has Biggest more _ower and lowest price ever. Ask your Ba m an Dealer about it or write us for tree liters: | MMA LEsD@ Ac) COLURMy Com Mec luil one one ind nam of your Dealer Indian Motocycle Co., Dept. P-12, Springfield, Mass. scos een 4 Now Only *5=> lamp industry SAW Fi Li NG PAYS 4 * Anamazing low price and tremendous \ B Foley S l 1 Sett z me Intense White Light uy a *y iw Filer anc er vt é ) 924 burner produces a white ! and establish an as pendent, - SaRae Our new 1 a eater brilliancy, a lis profitable business. bright and clear that you Wm. Rozell Clark, 363 N. E. 15th Ter- ; Imported Shade} fer it to electric light. N ce, Mian “It is s pleas Free—!* price] like it on the market; we vers lamp exclusive owners of 1924 p or t no el on this new lamp. ' rain on the eyes, in fact on pea utift T ppertes Don’t Miss This Great Offer ee . No matter what kind of lar Price s and catalog on request. | | are now using, don't overlook this ¥ Territory open to interested P ful opportunity for better light at lower parties. | Send only $1.00 and pay the small balances arrival or just send your name and addr FOLEY SAW TOOL CO. complete information. Send now 916 E. Lake St. Minneapolis, Minn. Special Offer to Agents —— ; The Nagel-Chase Mfg. Co., 284 E. Erie St.,Chicay

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POPULAR MECHANICS ADVERTISING SECTION <-\ SAVE_MONEY Reg. Price 500 Wo lty

Brings you this big Plumbing and Heating Encyclopedia-C atalog. Write for your copy today without fail. Guaranteed Heating Plants dy-Man Book shows how. well-bound encyclopedia of g and Heating Outfits, Systems, Fixtures and Accessories— 10,000 istrated. Hundreds of floor plans, s, diagrams, trade secrets, money le-saving kinks,etc.,“*How to save pee NP repair methods.”’ yuseholder, contractor, farmer; institution needs this book. at Water Setter »w to save wages, work and materials. Big Handy Man Book Tells how we help you plan and install. From rough sketch or description we supply working plans and clear instruc- tions. We loan the tools needed Any handy man can install. This is the place to buy on money - back guaranty. Plumbing Outfits and Supplies: Water Systems; Hot-Air, Water or Steam Heating Plants: Radiators, Pipes, Boilers or Septic Dis- posal Tanks. Send 25c¢ for Yours Today We have spared no effort or expense to complete this remarkable and instruc- tive book. To keep from sencing it broadcast to disinterested persons, we request a deposit of 25c, which will be refunded on your first order —or send for ow FREE Bulletin. Write iit save Re vine

Pipeless Furnace half HARDIN-LAVIN CO, 107-17 West Pershing Road él CHICAGO DEAFNESS IS MISERY | know because I was Deaf and had Head Nolses for ver 30 years. My invisible Antiseptic Far Drums re- red my hearing and stopped Head Noises, and will & it for you. They are Tiny Megaphones. Cannot be en when worn. Effective when Deafness is caused y Catarrh or by Perforated, Partially or Wholly Des- ra yyed Natural Drums. Easy to put in, easy to take out. \re “Unseen comforts.” Inexpensive. Write for Booklet d my sworn statement of how I recovered my hearing. A. O. LI ONARD, Suite 226, 70 5th Avenue, New York City FORD SPEEDSTER Classiest & Saappiest in U.S.A. Build one like it Lotsoffun! Blueprints, Specifica- tions, 4 Photos, etc. $4.00 i

postpaid. Send Racing Cars, 90 m.p.h. Fords. 50c for 3 Glossy * BUD STANLEY, Box 1, Detroit, Mich. (The Motor City) DlOcuive FOR CONSUMERS 100 PAGES

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INDENT TEST Now! Free Proof that You Can Play that You have Talent S long as you can remem- ber, music has stirred and inspired you. And so you have always hoped that you could play yourself—choose your fa- vorite melodies and express them as your heart dictates share in the greater pleasures and profits that come especially to those who play. But until now, you could never be sure of results in advance.

Now, however, for the first time, is pro- vided a free method by which you can determine your talent for music. Climaxing a lifetime of study and observation, Frank Holton announces the Holton Talent-Test. By it, thousands who never dreamed they possessed musical ability will have revealed to them great, unsuspected opportunities on this easiest- to-learn of all saxophones, the SHolton New Revelation SAXOPHONE In a few interesting minutes your talent is measured, so easy it is to know that you can play. You assume no obligations or responsibilities—you merely decide a question everyone should answer in fairness to his future. Mail the Coupon— Convince Yourself! Your request for booklet brings you Appointment Card entitling you to the Talent- Test in the privacy of any Holton dealer’s studio or in your own home with the aid of a Holton Saxophone and our copyrighted phonograph record on which the Talent-Test is recorded. FRANK HOLTON & CO. Elkhorn, Wis. America’s Greatest Band Instruments. Frank Holton & Co., Elkhorn, Wis. © ] Without obligation, I want to determine my talent for the easy-to-learn Holton New Revelation Saxophone. (Check if interested in any other instrument.) Cornet ( Trombone Baritone () Trumpet Street Address | Name ---. en : |

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POPULAR MECHANICS ADVERTISING SECTION NTORS: PROTECT YOUR IDEAS: WRI eS - as MARKS ANY NEW article, machine, design or improvement thereof, or any combination of parts or improvements in any known article which increases its efficiency or usefulness, may be patented, if it involves invention. IF YOU HAVE ANY NEW IDEAS which you feel are useful, practical and novel, take prompt action to protect your rights. I have invented any new machine, or new combination of parts or improvement, or any new desig process, SEND DRAWING, MODEL OR DESCRIPTION of it for information as to procedure t secure protection. DRAFTING and SPECIFICATION ROOM of CLARENCE A.{0"BRIEN, , Registered Patent Lawyer, | Washington D.C All Communications 20.6103 ge careful and p sare atte ntion 1S Z1\ case. I offer you efficient, reliable and prompt service—based upon practical experience. Highest referé NO CHARGE FOR ABOVE INFORMATION ClarenceA.O Brien REGISTERED PATENT LAWYER Member of | Court of Appeals, District of Columbia, United States Court of Claims; Bar of ) Supreme Court of United States, Supreme Court, District of Columbia Practice Confined to Patents, Trade Marks and Copyrights

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POPULAR MECHANICS ADVERTISING SECTION ‘COPYRIGHTS Write Today for FREE BOOKS, “How to Obtain a Patent” “Invention and Industry” and BLANK FORM, “RECORD OF INVENTION” These books will give you valuable information, and they nay save you much time and effort. Send for them, NOW. My practice is devoted exclusively to United States and Foreign Patents and Trade Marks. Write me freely, frankly and with full confidence; it is very probable that I can help you. Use the Coupon Attached and immediately upon its receipt I shall send you the form, Record of Invention, to be returned to me with drawing, description or model of your idea; promptly upon receiving your idea I shall write you as to proced- ure and costs. CLARENCE A. O’BRIEN, Registered Patent Lawyer | 709 Security Savings & Commercial Bank Bidg. Directly Across Street from Patent Office ’ Washington, D.C. send me your free books, “HOW TO OBTAIN A PATENT” INVENTION AND INDUSTRY,” and blank form *“*REC- }OF INVENTION,” without any obligation on my part. IMPORTANT—W RITE OR PRINT NAME CLEARLY | These Books Frée

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POPULAR MECHANICS ADVERTISING SECTION ATENTS we COPYRIGHTS Have You An Idea? Ger Offer: STS. Protect Your Invention Your first step before disclosing or submitting your invention toanyone either for entry in a prize competi- tion or for sale should be to write for our blank form “RECORD OF INVENTION” This should be signed and witnessed and returned to us together with model or sketch and descrip- tion of the invention for examination and instruc- tion and to establish Evidence of Conception. No charge for the above information. Our Four Books Mailed * , Free to Inventors 1007 Woot c Our Illustrated Guide BOOK Howto ObtainaPatent 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 s cure Foreign Patents in shortest time and lowest cost Progress of Invention ~ Our Philadelphia Office Description of World’s Most Pressing Prob- Suite 714-25 Liberty Bidg. lems by Leading Scientists and Inventors. == a Genes) | We Regard a Satisfied Client as our best advertise- ment, and furnish ariyone, upon request, lists of client in any state for whom we have secured patent Highest References—Prompt Attention — Reasonable Terms VICTOR J.EVANS & CO. PATENT ATTORNEYS Main Offices: 956 9th St., N. W., Washington, D. C. — — - Opposite U. S. Patent Office

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POPULAR MECHANICS ADVERTISING SECTION PATENTS vous IMPORTANT 9 not submit your invention to anyone before you furnish oof that the invention is patentable or application has been d. In order to have YOUR CASE MADE SPECIAL TO \VOID DELAY you should take the precaution of having uur case made Special in our office to secure protection, ve correspondence and secure early filing date in Patent Office. To secure special preparation of your case send $25.00 n account with model, sketch and description. MAIN OFFICE, VICTOR J. EVANS & CO.—VICTOR BUILDING, WASHINGTON, D. C. All Communications and | CUR ORGANIZATION OFFERS Data Strictly Confidential. PERSONAL SERVICE . by registered attorneys at law members Interference and Infringe- | of Bar of U. S. Supreme Court. Court of Appeals, Supreme Court of D. ¢ I ment Suits Prosecuted | U.S Court of Claims. FREE) VICTOR J. EVANS & Co. | COUPON PATENT ATTORNEYS NEW YORK OFFICES CHICAGO OFFICES 1007 Woolworth Bidg. 1114 Tacoma Bidg | 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. | men: Please send me Free of Charge your books as described on pr lir | Vame a ur Chicago Office Suite 1114 Tacoma Building Our Pittsburgh Office Suite 514 Empire Building | > Lr || Our San Francisco Office Suite 1010 Hobart Building —_

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POPULAR MECHANICS ADVERTISING SECTION PATENTS Seventy-eight Years of Practice HE firm of Munn & Company filed its first application for a patent in 1846, and for seventy- eight years has endeavored to keep pace with the inventive genius of the United States. An experience of many years is at your disposal. If you have an. in- vention which you wish to patent, send yoursketches or model together with a description of your device, explaining its operation,and you will receive prompt, courteous attention. Write for our Handbook on PATENTS A full and complete booklet on Pat- ents, Designs, Trade-Marks, Foreign Patents,Copyrights, Labels and Patent Office Practice with an explanation about our methods, terms, etc. All communications strictly confidential. v Keep in touch with the inventions of the world by reading SCIENTIFIC AMERICAN The MONTHLY MAGAZINE witb a special appeal to every man of in- ventive genius. Recent rulings of the Patent Office, descriptions of the latest patented inventions, legisla- tion and court decisions affecting patents, are noted in this authorita- tive publication. MUNN & COMPANY Patent Attorneys 672 Woolworth Building, New York Scientific American Bldg., Washington, D. C. 1301 Tower Bldg., Chicago, Ill. Hobart Bldg., 582 Market St., San Francisco, Cal. Van Nuys Building, Los Angeles, Calif. END FOR NS NJ THIS FORM DON’T LOSE YOUR RIGHTS TO PATENT PROTECTION Before disclosing your invention to anyone send for blank form “EVIDENCE OF CONCEPTION” to be signed and witnessed. A sample form together with printed instruc tions will show you just how to work up your evidence and establish the same before filing application for patent AS registered patent attorneys we represent hundreds of inventors all over the United States and Canada in the advancement of inventions. Our schedule of fees will be found reasonable. The form ‘Evidence of Conception.” sample, instructions relating to obtaining of patents and schedule of fees sent upon request. Ask for them—a post card will do PATENTS _—_ MARKS LANCASTER “ge & ALLWINE Registered Patent mn ee in U. S. and Canada. 480 Ouray Bldg., WASHINGTON, D. C. Originators of forms “Evidence of Conception.” Patent Litigation PATENTS =: Copyrights | Handbook of instructions, ‘How to Protect Inventio: sent free on request. R. H. FRAVEL, Patent Lawyer Formerly of the U. 8. Patent Office Examining Corps Room 1503, McLachlen Bldg., WASHINGTON, D. ( y derive larg rofits know eed certain tm le but — facts before applying for Patents. atent-Se gives those oS sent free. Wiis LACEY 3 LACEY. e466 hb. ‘St, W ustington, o.c. Getaltehes 186 REGISTERED PATENT ATTORNEY SINCE 1905 , CHARLES W LOVETT Sica) 8106 (YN MASS NO FOR FREE BOOKLET Have You An Invention? If so the WORLD PROGRESS will show you how PROTECT AND PROFIT FROM YOUR IDEAS Sample copy free. One year’s subscription $1.00 Send for free book, “WHAT TO INVENT” containing SUGGESTIONS TO INVENTORSas to I tions Needed We invite manufacturers to addré regarding inventions they want. WORLD PROGRESS PUB. CO., Inc. Room 203 Victor Bidg. WASHINGTON, pd. Cc

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POPULAR MECHANICS ADVERTISING SECTION 167 YOU CAN NOW LEARN HOW TO INVENT! —How to develop your imagination How to develop your ideas How to get the facts you need for inventions How to keep legal records of ideas How to use scientific principles of mechanics e How to avoid wasting time on impractical inventions How to apply for a patent 0 e al Wi all ea How to organize a company How to protect your rights -How to market a patent 1 offer a comprehensive, experienced, and hundreds of other vitally important facts which EVERY . . successful inventor knows and uses A remarkable new, and efficie nt service for his prompt, legal much needed course which can be studied in spare time, protection and the development of | home. - his proposition. Send sketch, or model and descrip- MakeYourldeas PayYoua Fortune _ You ean now learn how to train your mind along scientific invent tion, for advice as to cost, search ive lines. No longer need you let your mind wander in unprofitable ae flelds. You can learn how to think of worth-while ideas and make through prior United States pate nts, your ideas pay you money The trouble with most people is that etc. Preliminary advice gladly fur- the 3 do net know what se do with che ir dees aeyarons of oli ars ° ¥ £o to waste Decause 0 ese undeveloped ideas Now for e first nished without charge. time you can learn to harness your thoughts and make them work for you! One little invention, properly developed, may make you My experience and familiarity with independent for life! various arts frequently enable me to accurately advise clients as to You Are Born an Inventor probable patentability before they go to any expense. ; Develop your ability Booklet of valuable information and ; age Every man, woman, and child form for properly disclosing your is born with creative imagina- y . tion. Some develop this faculty idea free on request. Write today to a greater degree than others . ‘ and those who devel it to the Richard B. Owen, Patent Lawyer Soentest extent are successful ine bt entors iventio orderly 9-303 Owen Building, Washington, D. C. we toe RvenSee, & SS Sewers e process of the mind, which com 2276-E Woolworth Bldg., New York City | bines two or more known facts 1 a . to produce a new fact Anyone who develops the right mental ——— can become an inventor {very successful inventor has this type of mind, developed by con- stant experience over a period of perhaps many years. Heretofore f : those who succeeded in the field of TO cL a PARKER : J invention had to discover all the | : principles themselves. But, now, ember Examining | ‘ ; just as any student of medicine, 4 oe 8. Patent Othies | ' law, or engineering can take full PATENT LAWYER | advantage of all the recorded ex- MCGILL BLOG perience in these flelds of study, so can YOU take the same kind of WASHINGTON. D.c. short cut to the habits of thought, | Patents, Trade Marks, Copyrights, Patent Litigation Raymond #. Yates S'Suenesstul inventors Handbook for Inventors, “ Protecting, Exploiting Every inventor realizes the and Selling Inventions,” sent free upon request. | hopelessness of groping in the dark for the habits of PATENTS thought and methods of work required for successful invention Trying to invent Trade-Marks, Copyrights and Patent Litigation | “Invention Is a Science — without knowing the fun . T damental requirements of , j; and Should Be Taught ; J ite for advice and instructions how to proceed, . d h P fessi — in jeation ie ike try ing to sts, etc. Hand Book with illustrations of 100 Mechan- | as a Frofession vulid abridge witho 10w- ng engineering Movements sent free on request. This is the first course in practical Invention that has ever been A LBER bE D I E T ERI CH levised Now you can take Edison advice and actually learn ; T ° HOW TO INVENT how to make invention a profession! In Patent Lawyer and Solicitor simple, easy-to-understand language yu are told how successful 4 | n\ tors “yy vo 4 ‘ To Us the ~ T ts ) tior th cessor to Fred 6. Dieterich & Co.621A Ouray Bldg.,Washington,D.C. (| | ‘inventors work u learn how SCrets OF INVENTION that convert a simple little idea into money PATENTS| AmazingBook®sccnce™ ‘ men o have thought o lit Send us sketch or model for free patentability Fortunes naw ng gdh. nen nave . auemt f ye. on opinion and exact cost of patent. Our book “Hew idea in a fash— the bottle top, the cr Sia Gextumal wet, there ane to Obtain a Patent’”’ Sent Free on request. It tells pospree cece Reson hae > tors who did not know just what to how to apply for Patents, Trade Marks, Foreign Patents, as many fortunes lost by inv cootea tenet exutaiabam this womdartel Copyrights, etc.; gives information on Patent Pro- do about the : . ; a a : ommunenner s bees yrepared nd cedure; tells what every inventor should know. Thou } bew course wr vy 14 prac Sa enee es Oe a pe agp sands of Inventors, who are our clients, are our references will be sent free those genuinely intereste you have ¢ ; had an idea for an invention. or if you would like to become a spare- CHANDLEE & CHANDLEE, 25 Years’ Experience time or professional inventor, and if you would like to know what 473 7th St. Washington, D. C. to invent. send in your name at once on the coupon or ts NOW! Only a limited number of these books are availab distribution ALL KINDS INVENTIVE SCIENCE CEAR SMA LL BUREAU OF ROCHESTER, N. ¥ Tbe aan) equate wate ant ee Bureau of Inventive Science, 312 Wisner Bidg., Rochester, of gears in stock for immediate ship- Please send me your free book “ The Science of Invention ment. Can aleo quote on special gears of all kinds. Send us your inquiries. WRITE FOR CATALOGUE. CHICAGO STOCK GEAR WORKS Address 105-109 S. Jefferson St., CHICAGO Name

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POPULAR MECHANICS ADVERTISING SECTION PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSON E. COLEMAN, Patent Lawyer, 644G St., Washington, D.C.

WEAR ONE 7 DAYS FREE BLUE BOOK ON PATENTS gives instructive information and candid advice. MONROE E. MILLER, PATENT LAWYER 411-2 Ouray Building WASHINGTON, D. C. ELECTRICAL AND MECHANICAL EXPERT

NEW Model BOILER and torage Can Made of extra strong, heavy pure copper with a 5-inch Soli SS Srass Cap and Spout. Rubber A gasket between cover and shoulder makes airtight *. Besity gleaned. } ° ‘ew Cap, no SEND IT BACK A — ‘match th. | threads to get out of GENUINE DIAMONDS in every way. feez | 5 6.50 ( i order. Noburning of ous blazing flash and dazzling play of rainbow tire. Stand- | -.Galion....$ 6- hands, no trouble in ing the terrific Acid Test of direct comparison. Lifeti ts | 8 85 ( l taking off cover.Cap need all their experience to see an eee * a 7 ean be put on or tak- MAKE THIS TEST mond side by side on the same finger. i en off in a second by for SEVEN days. If you and your friends can tell the difference | @ simple twist of the f?'vou keep the ring the price printed hore ie ait ran dan make iN) ~ Hy umb “serew <a c e eo ere is @' o ay. oo in- - taliments. R ber CORODITES alune have’ the seme teen —" See ePagleand der. r able. No article of 3-84 such qualityand util- 3.9 ity ever sold at such

gutting, as Genuine Stones. Ladies Hand Carved Basket Ring, Platinum effect s Ladies Pierced Filigree 4 Post Ring, Platinum effect ; A. 8. C. Ladies Filigree Ring, Biue Saphire Set Sides, 2 Ladies Brid: Hand Chased Solitaire Mens Heavy Belcher 14K Gold Filled Ring $3.4 q ‘ low price. It’s alow : Mens Massive Carved Hexagon Gypsy, Sapphire Sides i a MI pressure boiler and pas- Garet Size Gems Besatifal Hane Gorved and Sagvaved _ EHH eee turizer. An ideal cooker for reproducing in exact an aithtul detai most m ro hi age om & ticod and fashsionable Platinum Diamond Creations. sin “ the home. etting bettee = Stace ont J END NO MONEY Scvp,zour money, cicht at home. Just service and ‘satisfaction. “Above are strictly cash with send name anc rese stating which rin Service and satisfaction. 7 you want and size as shown by slip of paper fitting end to enc , ices. Send money order or check. Prompt P order Factory prices. S y around finger joint and your ring will come Ly return mail. Deposit : ti lain strong box. Only can worth having. amount shown above with postman. You do not risk a penny as shipmen pe ee NUFACTURING CO our binding legs! guarantee to retund your money in full is at- Catalocne Free. HOME MA ; E RICHWINE Gt D SEND Topay. — Dept.1441 321 W. Chicago Ave., Chicago, Illinois m Blvd. Ss ept. HICAGO, ILLINOIS - Original and Sole Importers of Genuine CORODITE GEMS Our BUREAU OF INFORMATION will answer all ques tions regarding articles appearing in this magazine

INVEN PROTECT INVENTORS voce tras 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 s+ aneeenes your invention for our Examination . and Instructions without charge. Name RANDOLPH & CO. } °°: 300 Victor Bldg., WASHINGTON, D.C. ¢ cr,

on anes oo.

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ques zine. we POPULAR MECHANICS ADVERTISING SECTION IN TWO 4.000% voxrns Jacob Gordon’s Profit (aking and selling Crispettes. Bram bought first outfit April 5, seven more outfits by August 28, P hots Cal., bought one t then, 10 more within a year. Mrs. Lane of Pittsburg “Sold 8000 packages Crispettes in one day’ Bert, Ala. Wrote, “Only thing lever bought that equaled ad- vertisement” 1 J M. Fatiiic, Deal, writes, “Enclosed find draft to pay_ all my notes. etting along fine. Crispettes you claim and then gome.” John W. Culp, So. Car., writes, “Every- thing gong lovely. Crispette ungpae Ve lying ; all over. It’sa old wor Kellog $700 me me el week. Mesner, of Baltimore, $250 in one day. Baker sold 3000 ges in one day. Perrin, $380 a WE'LL START Y YOU IN BUSINESS Furnish secret formulas, raw material, and equipment. Very little capital required; no experience needed. Build Paying Business of Your Own it to the sale of Crispettes. Everybody likesthem. It’s a delicious food confection made with or without sugar. Write me for facts about a business that will make you independent. Start now, in your own town. Profits $1,000 a Month Easily Possible 1 post al for Tiustrated book of facts. In contains enthusi- astic letters from others—shows their places of business, tells how and when to start, and all information needed. Free. Write now! LONG-EAKINS COMPANY 1228 High Street Springfield, Ohio A REAL AUTOMOBILE Any man or boy « ant - it orb muy it com plete. Power supy at ms a P SHAW motor Wei teh sLFREE P. arti lars and Special *rices Or sen for COMPLETE ‘BOOK oF BUILDING PLANS. SHAW MFG. CO. Dept. 7x GALESBURG, KANS. Men and Women! @ week me today and by this time next week I can place you in a position to make $2.00 to $5.00 an hour in your of ions — a day fall that and more ' our ves are ing with our New Pians. Simply introduce and ‘take orders for famous World’ "= Btar Hosiery and Un- , direct from mill to home—a com- lete line for whole family. Per orders mer ah gg Fae 7 big income. prea Nocapital required. It’s a chanee to make thousands of dollars. Y clasive territory. No rite today and I'lisend ail facts tell how to start Free. (Established World's Star Knitting Co. 282 Leake Street Bay City, Mich. OWN, -—and direct from factory Only $1.00 down buys the famous Studebaker Insured Watch direct from the factory at the low factory price. Choice of 54 newest Art Beauty Cases, in white gold, reen gold or yellow gold effects; 8 Seaieinee dial designs. Mail coupon for beautiful Style Boo Sent Free! 21 Jewel ~ Extra thin STUDEBAKER The Insured Watch Has 21 Jewels—8 adjustments—and is insured for the lifetime of the owner. The masterpiece of timepieces et an amazingly low price. Watch Chain FREE! For a limited time we are offering a beautiful Watch ain FREE. Write while offer lasts. Mail Coupon for FREE Book Mail coupon today for magnificent Studebaker Book of Advance Watch Styles. Find out how you can buy direct from the factory—save money and own one of the finest watches made. The Book shows 54newest thin-model designs in Art Beauty Cases. Sent FREE! STUDEBAKER WATCH CO. Dept. N-22 South Bend, Indiana Canadian Address: Windsor, Ontario Ask for Ladies’ Bracelet Watch Folder Ask for Jewelry Folder STUDEBAKER WATCH CO. Dept. N-22 South Bend, Indiana Please send me your Free Book of Advance Watch Styles and particulars of your $1.00 down offer. If vou live in Canada send your inquiry toour Canadian office: Windeor, Ontario. k in colors— ik here f Cheek here for Cs Watch Folder 0 Jewelry Folder

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POPULAR MECHANICS ADVERTISING SECTION , MEN BOAST ahout their CORNWELL TOOLS A hundred thousand men boast that CORNWELL Hand Made Tools do work no other tools can do. They'll show you tests other tools can't stand Try these amazing tests yourself at our risk. Use these tools in shop and home Money back guarantee on every » oA | ne “ay a CORNWELL Tool. Finest Tools in the World CORNWELL Tools made of finest Swedish Charcoal Process Molyb- denum Steel, from our famous Corn- well secret formula. Forged, heat treated and hardened and tempered in oll. Made by hand, NOT drop forged and case hardened. Try These Strong Tests Cut vise handle shavings with bearing scrapers. Drive % in. flat chisel through 1 ‘4 in. machinery steel. Won't damage tools. Many other tests described in booklet. MAIL THE COUPON! Get special illustrated booklet and prices now. Then order. If you ever saw tools as good as these return your order and A yref d. Mail pon at once. CORNWELL QUALITY TOOLS CO., Dept. D, Cuyahoga Falis, Ohio Send me illustrated booklet with prices on Cornwell Secret Formula Hand Made Tools will make your territory Wr Harry I. Jacobs, Wisconsin, N. E. Snider, Michigan, found it easy to make that much and more. No Wonder. There is a new way to become a specialist in hosiery and underwear—and to make $50 to $150 a week. Wearplus fine hosiery and un- derwear, at : w factory prices, are taking the country by storm. A wonderful opportunity to become inde - ndent, witha businessof your own. Liberal commissions at the start. Repeat business, on account the wonderful values offered and our iron-clad guarantee : a gold mine. Bonus paid producers, ite quick for sure-fire Sales Plan and Sample Case Offer. Arthur Huebner, President The e Wearplus Company, 560 Wearplus Ave., Bay City, Mich. Models of Round the World Flyers Built with Ideal Model Airplane Outfits These 3 ft. duplicates of real ’planes fly by their power. Accurate models of the big ones, faithf duplicating them in every essential feature. Any Boy Can Build One! Our catalog shows models of eight famous ’pla and tells how to get complete construction outfit parts and supplies with which to build them tells all about the celebrated ‘“* EveryBoys’”’ Airpla Send 5c now for your copy, and get a Model Airp for Christmas. Plans and Instructions Complete Scale Drawings, with Building-Flying lI tions for a 3 ft. Model of any of these 'Planes: De Havilland World wiyer Curtiss JN4D-2 ‘raining Plane; Cur- at rc (Set of 8 Plans, $1.60 postpaid.) IDEAL Catalog, 5c postpaid. POSTPAID tiss Military Trac tor; NC-4 Naval Ideal Aeroplane & Supply Co., 408 West Broadway, New York Seaplane; Bleriot, Taube or Nieuport Monoplane; ¢ ‘ecil Peoli Racer BE THE MAN Make $24.00 a day OFTHE HOUR 3250. . overcoats at oate at the smashing smashing price of You make $3.00 on each order. Write for samples ar information at once, for best patterns, samples—and g1 est value. Address “Jim” care of . ‘Jim’ r Foster Clothes 2250 So. = Seetaes Ave. Send ~ T Men— Women — Children Re trims, or bobs hair—as « combing. No 1 a we | for youa necessary. Perf barbercan do.Com- Y U, sults. Prove the ¢ bination hair cut- Hair Cutt ter, safety razor and comb. your ow! Just send your name tox AA at our ris our Free Trial Offer. polly u risk. No obligation. Write today. COWAN main curiae, AT HOME We Want Agents at$50 to $90 a Week New Invention—Just Out. Nothing else like it. knife, paring knife, seconds. At the end of the first ¢ i saw.”” Wm. G. about.”’ Quickedge Knife and Shear Sharpener Low priced—Sells on sight. carving knife, bread knife, or shears and scissors Mechanical masterpiece. slot—turn crank—sharpens both sides at once automatically. at once—men and women hustlers. No Experience Necessary—200% Profit Make as much money next week as these men are making now. Kansas, says: ** ! haveseld one hundred sharpeners In four days. ** Hobart Kerr, of Md., “The women can hi om wait till they get them.” ay, J.W.Gordon, of Pa., writes: Hall, of N.J., The machine is a mighty fine proposition. You can make this money. WRITE TODAY. TERRITORY FREE. Get busy at once QUICKEDGE SHARPENER CO. Patent Sharpens any kit in ten Just put knif We want representatives Get this position where profits start first day Needed in every home every day. A child can use it. J.C Lew Herbert Cain, of Ky., sold nine after ‘I sold two dozen and # sold to everyone I think it is great. I sold six in about one-half ! fam a mechanic and | know what I am talking says: “* 112 Sharpener Building JACKSON, MICH. do | S

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POPULAR MECHANICS ADVERTISING SECTION ‘A little Wizard WE-PO-AD*::::: FITS RIGHT IN THE VEST POCKET— DOES THE WOR OFA 00 ADDING ot Sells for Only 5 itt ——| Special Agent’s Price $1.00 in Lots re Profit ivery sate Marvelous new invention. A perfect adding ma- chine that is positively accurate, quick as light- ning, easy to operate and—F ITS < RIGHT IN Your Chance to YOUR VEST POCKET. Loctors, lawyers, architects, merchants, farmers, salesmen—every Make a Cleanup body in fact can use this little machine con- stantly. It’s light, flat and compact Here's a real chance for you to make $20 to $30 to clear profit every day. Hundreds of buyers VE-PO-AD T right in your territory. The’ most amazing, —— “ '@ we profit-producing article on the market. Nearly Counts Up to 999,999,999 200% profit on every sale you make. Exclusive PROFIT DAILY Cs anatase : : ear — territory to live wire agents. Sample machine mple st thing you eve! : Saw. $2.95, cash or C.O.D. 10 days free trial. Money Seonte actuation dilor * - Spe edy, Accurate just like a_ back if not satisfied. Order at once. Get in on g one g , : y . am maneyeenen a -hogees 1 ' Everywhere. Cet started 00.00 machine. Nothing to get this big, new money-making proposition—NOW ! aon oon this cour un +2 out of order. Always works. Fully Reliable Adding Machine Corporation § make big money quick k guaranteed! 39 W. Washington St., Chicago, Ill. WRITE TODAY! Convert your Ford “ 9 attractive speedste NOW and save ‘ iow ee S motes 2 E LUXE | = ay 100% ’ ee ~ BODY 50 (am ; ‘: i GIBBS raccer TRAPS kill— or hold every pnimal it catches. **Wring-offs’’ impossible. 2 . s At dealers or sent postpaid—ic each or $7." ac dozen in U. S. ‘ Send for CATALOG describing also the new “GIBBS DOPE TRAP”

for larger animals ive. : \3 ’ W. A. GIBBS & SON, Dept. BP-12, Chester, Pa.

Branch Factory, Toronto, Cana i Discs, etc setesens Paden Racing Gears, s, ete. ts r Now! ROCK-BOT OM, WINTER PRICES! COME IN TO-DAY AND INSPECT NEW SPORT COUPE BODY AND OTHER MODELS - L. FORDSPEED BODY MFRS., 250 W. 54th Street, New York “ BOW LEGS and KNOCK- 9 KNEES” UNSIGHTLY SEND FOR BOOKLET SHOWING PHOTOS OF MEN . | WITH AND WITHOUT THE PERFECT LEG FORMS ah AE PERFECT SALES CO. w ‘a 140 N. Mayfield Ave., Dept, §, Chicago, Ill. Ind. " The Famous KON-VER-TER Slide Rule Instantly adds, subtracts, divides, multiplies ‘“ converts fractions or decimals of an inch. Giv« Order , 3 \ . sines, co-sines, versed sines, co-versed sines ‘ co . \ tangents, co-tangents, secants, co-secants f No. angles directly Gives square roots, squ re f : " cube roots, cubes and fifth roots and powers of | M-187292 fie i i all numbers. Logarithms, co-logarithms, ant | - + \ logarithms. Used throughout the world. Ab« 6 inches in diameter Most complete rule j ri c. . - y sed kind selling at a popular price 2 re | en WSs be book of instructions and box with each . vr ” \ DeLUXE MODEL White Ivory Celluloid, $3.00 | A wonderful little machine. Plays 10 or 12 it ~S Sg records Splendid for dan ng. Weighs only &-It yes SS =- Ew TON, MASS carry it a where. Built in sturdy steel cas« by — mahogany finished. Has speed regu | stop device like expensive machine motor plays two records, one winding. is 714 in. high, 13 in. wide, 12 in. deep. FREE : with order, 4 (Columbia Record and 100 needles. Send ne $1.00 to ia we od faith. Pay rest plus few cents postage, to postmaster Satisiaction guaranteed ns ate. : or money refunded. Get your order out now ce Free Catalog H. American Novelty Co., 2455 Archer Ave., Chicage, Ill.

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POPULAR MECHANICS ADVERTISING SECTION Vacufarm On the Instrument Board of Your Car Blows Horn when Gas is Low. Tells exact amount in tank. Vacuum Indicator warns of trouble in advance. At your dealers or by Parcel Post, prepaid with complete instructions on receipt of price—$8.90. Installed in 20 minutes. Money back in 30 days for any reason. THE SMITH — EQUIPMENT COMPANY 1946 West 77th S Cc leveland, Ohio Foreign A Pocket Stor ss PHONOGRAPH AT LAST! The Phonilo is a simple pocket de- vice that plays all needle rec- ords. Astonish your friends and win applause. It lasts a lifetime. Sells on sound. Postpaid One Dollar in U.S. LOTS of FUN—NOT A TOY Hand-Phonilo Co., P 123 W. Madison Street, Chicago F you want a Loud § which brings in y that you don't strain your ears to hea of its pow put makes Rad musical and artistic pleas is eenaitive to every tone « piano sounds like a piano a a tin pan—which is so bea it harmonizes surroundings Holtzer Cat is the Loud § you. Further Standard of Quality ONLY in Rad: (Pe Dept. P. M. SPR THe HOLTZER CABOT ELECTRIC CO o¢ 2S Amory S.reet 6161-65 South State Se 8OSTON CHICAGO Electricity Magnetism BOYS! Send for this FREE Book “Electricity and Magnetism” A complete treatise, simply and clearly written on the principles of electricity and magnetism, profusely illustrated by diagrams, photographs and engineering drawings, together with com- plete instructions for building a small motor yourself at a cost of only $1.50. We will send you this book ABSOLUTELY FREE of cost if you mention the name of the Popular Mechanics magazine. KNAPP ELECTRIC CORP. 130 W. 42d St., Dept. 25, New York, N. Y. A ABSOLUTELY FREE | Thousands of RADIO BARGAINS Vou Can't Equal This Anywhere SRACO Leads sete—2000 Ohme—t 3 ad bands and cord 4 9 tremely sensitive, Write Dept. 12 for wonderful catalog. STANDARD ae i 227 WEST MADISON ST. CHICAGO DYNA-MOTOR Asa or xamo it will operate induction coils, light lampe, charge storage batter- ies, electroplate ma n ideal machine for experimentir they will operate _ vy rr wheels, and other appliances 16 Watt dels, emery 32-Watt Dyna- Motor to © 08 Loomis ELEC 1427 NN. Artesian Ave. CHICAGO, M1, Buchstein’s Fibre Limt is soothing to your fag stron: neat, light. Eas Braces for all « ie f Th = D. BUCHSTEIN CO 610 3rd Ave., So., MINNEAPOL: Rush your name and address and learn ! get this handsome 14 Kt. gold a mat and chain ABSOLUTELY GIV v 10 jewel Lever movement. W iy toda delay for FREE watch plan. RELIABLE SALES CO 434 Broadway Dept. 278 New Yor’ MINA. City

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k City POPULAR MECHANICS ADVERTISING SECTION ntNow! Crammed full of information and offers kinds of complete RADIO SETS, Parts and Accessories Only $21.95 for 1-tube t eceiver parts unas . ed; often receives over “ Only $53.78 for t, receiver assembled; ssembled; has received Enge se prices include all acces- . al, ete.—everything need « on head phones. Also, Crosley receivers, 10% off, 25 popular sete away down. —_ = It's easy todo business with ws, for this is “The Radio House of Friendly 3 Service.” All goods offered subject to examination and approval. No advance Quic We pay transportation anywhere in U. § " 7 mones k. Your radio questions answered free. Get this wonderful catalog—you need it- Don't detay! i will you be so kind as to add the names of several friends you beiieve wil! radio goods? Thank you!) LIBER MAIL ORDER HOUSE 163Z, 106 Liberty St., N.Y. { Buy a Headses youll be proud of \ —= he STANDS SQUARELY BACK OF EVERY HEADSET New $2.95. wth Notabie Improvements log re . onget Magness. Higher Rewstance. increase of Sensitivity Pertect T EVERY SET TESTED BY LICENSED RADIO OPERATORS Send no money- Order on a Sost-Card THE TOWER MBG. CO Dot. P,98BROOKLINE AVENUE, BOSTON, MASS. APLAR! seccntne PEPE) Como Duplex Transformers (Push Pull Power Type ) bm ron | Per Pair e Como Duplex system of audio frequency amplifi- tion (push-pull) gives the maximum volume without tortion and tube noise. There is a combined filter- . action which assures perfect results when ordinary plification transformers fail. Can be used as a single-stage, two-stage, or a three-stage amplifier. The World’s Standard Push Pull Transfermer Send for copy of “How to Build a Power Amplifier.”’ COMO APPARATUS CO. 46 Tremont Street - BOSTON, MASS. 9 —_ — ( APE-X VERNER DIAL >) , = ssi Ch — — a Do not bother with geared condensers, requiring many holes in the panel and careful lineup of pinion shafts, when this marvelous instrument provides the fine adjustment for tuning in distant stations Ratio 10 to 1—-quickly applied to any shaft. For sale by all good radio dealers. If unable to obtain fill in coupon and enclose $2.50 for nickel finish or $3.50 for Gold Plated finish. - -" —_ eee oe 7 rs. = 2 ee = Coast To Coast On An 18-Inch Loop Assembte Your Own 7 Tube Super-Heterodyne el three ure, $97.50 buys t par omplete, including ed panels, condensers transformers, dials ect- plugs. cables, et with dra diagrame and structions Price of cabinets to fit—furnihed on applicatx If your deal annot supply these parte for this complete Micredyne Radio Set, fill im coupon, mail check or money order and send dealer's name ess ee ees ee ee Apex Electric Mtg. Co., Dept. 1201, 1410 W. 59th Street, Chicago, Ii. Gentlemen: Enclosed find $ for wh send me Catch Everything in the Air! Keep your radio batteries charged —and you won't miss a thing. APCO Battery Charger does the trick over-night for less than 10c per battery. It’s noiseless, clean, compact. Connects with ordinary light socket as easy as an electric ‘‘flat Write for interesting circular and nearest dealer's name. APCO MFG. CO., New Yerk Ave., Providence, R. 1. APCO BAliciRS for ‘‘A’’ and “‘B”’ Batteries

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POPULAR MECHANICS ADVERTISING SECTION Storage “B” Battery 2¢ets Lasts Indefinitely— Pays for Itself For a limited time only, and to introduce this new and superior Storage ‘B’’ Battery to the publi ic, we ere selling it direct to the consumer for $3.50. Regular retai price ta $5 You save $2.00 by ordering NOW C “ n th Solid feubber’ Cave, an insura ance aw against acid and rs. eavy, rugged pla’ UNNINGH AP * batteries and will last indefinite! AMPLIFIER TUBE charged ata negligible as El tes many noises oo often bla a3 TYPE C 3014 on ‘‘static’’. Order yours 3 3 PATENT E! ust state number of batterics SEND NO MONEY wanted and we will ship day order is received. EXTRA OFFER: 4 batteries in series (96 volts), $15.00 Pay Expressman after examining batteries. wp Pt cent discount {or with order. Save $2.00 by A NOW WORLD BATTERY COMPANY 1219 So. Wabash Ave., Dept. 6, Chicago, Til. Makers of the Famous World Radio **A’’ Storage B jattery. Prices: 6 volt, 100 Amp... 12.50; 120 Amp., $14.50; ti Amp, $16.0 yt aT in writing for two years Quality Plus Service Since 1915 The General Electric Laboratories produce these tubes which “Since 1915’°—a Radio Lifetime— have consistently made good their claim of excep- tional accuracy. Price the same on all Five Types C-301A C-299 C-300 C-11 C-12 | 2-18-08, 2-18-12, 12-30-13, 10-23-17, 10-23-17, and others issued and Users get stations from New York to Frisco—toud and clear - . 7 Operate with either dry cells or storage batteries. Beautiful pending Licensed only for amateur experimental and entertainment cabinet finished in mahogany with new platinum-finished panel use in radio communication. Any other use will be an infringement, SATISFACTION GUARANTEED Don't pay $100 to $150. Write ; : ey- p ; Cunningham 40-page Data Book fully explaining care and Cor Gur euemey-cering plan and Miapature operation of Radio Tubes now available by sending 10c in 2-Tube Set - $29.50 Stamps to San Francisco Office. 4-Tube Set + 59.50 . Biggest possibilities you ever heard of Dealers - Agents: Write for plan and territory quickl g , THI FARAWAY RADIO CO. 662 Ww. THIRD ST., CINCINNATI e S HOME OFFICF SAN FRANCISCO CHICAGO NEW YORK \ Patent Notice: Cunningham tubes are covered by patents dated F“ AWAY Radio Sets are amazing values at bargain prices. Charges radio 2, 4 or 6 volt “‘A’’ battery battery up = 20 volts and auto batteries f socket Average cost per charge about Solidly built ‘will not get out of order | and simple The yA successful cha ge . . duced over ten years Type A. | } West of Rockies, $21, “SType € for 6 volt ia auto batteries, rice $16; West of Rockic B’’ arging attachment, $ on Write for literature and name of dealer supply you with the genuine FF charger REEB*: ory ly send name “pana o.27s FRANCE MFG. CO. By for big 10424 Berea Road CLEVELAND, omi0 is. page catalog of latest radio goods at Wholesale. Live dealers and agents wanted. Thousands of radio bargams. stand STANDARD RADIO CO., 102 East 13th, Kansas City, Mo. : adi G : REE peda wer A Be = @ tubes, etc.. at one-third less than prices, aiso latest information on all carcuits. co of broadcasting stabons and other valuable data 5 Or a a ram aceumr ens Oo — BOOK : & CATO OG Se NORWALK RADIO CORP CREE Dept.56 66 READE ST., NEW YORK Contains— 75 Radio “Hook-Ups” 300 Illustrations By Ordering from Our Bargain , ioe Catalog ot Nationally Advertised / “Build Your Own with RASCO Parts” © Radio Goods, Write for lt Toe IRADIO SPECIALTY G.¢ AMERICAN RADIOw 0. See 6 6 o". ——, wy Y: ory Dept. ON Sods) Or ee mae A

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POPULAR MECHANICS ADVERTISING SECTION 19° vs: | —(FAHLBERG)|— COMPLETE MADISON, Wis. with 6.00 phones, tube, A and B Battery and complete antenna. for perfect Gets local stations without an <2 ° e aerial. Highly selective. Fine | Conductivity in Radio volume. GUARANTEED. A WONDERFUL XMAS GIFT /SENSATIONAL BARGAINS! on nationally advertised sets complete, ready to operate. Also on accessories alone. Look at these amazing values. g for guaranteed, highly selective coast- to-coast 4-tube set complete with 9.50 = joud-speaker, 6.00 phones, 3 dry cells, 90 volts, B Battery, 4 tubes and complete nna. For operation with storage battery, 69.95 complete. 4925 to-coast 3-tube set with 9.50. loud | Soldering Furnace

to-coast 3-tube set with 9.50 loud speaker, 6.00 phones, 674 volts B Bat- (Burns Denatured Alcohol tery, 3dry cells, 3 tubes and complete an- nna. FOr operation with storage battery, 61.95 complete. AND TESTED SUPPLIES for guaranteed 2-tube outfit with 6.00 2 : 3 95 hones, 3 dry cells, 45 volts B Bat- Safe Soldering at Home. It is now pos- tery, 2 tubes, complete antenna. Fer sible for the amateur to get tight, clean joints wes with storage Battery, 44.95 complete. in h’s home soldering that make the perfect 6.00 P vy eke 8, 3. = . 00 — -_ 3.00 and scores conductive path necessary in radio work. f de yains Ss also sold alone. Mr. E. D. Fahlberg, former Professor of Metallography Send order direct and pay on delivery at the University of Wisconsin and Metallurgical En or write for FREE catalog. Reference: | gineer with Western Electric Company, has developed The Allas Nat'l Bank of Cincinnati, O. Reddy Hot, the complete and safe home soldering furnace that this class of work demands. Reddy Hot THE MELLODYNE RADIO CO. will heat your iron ready to solder in two minutes and is Dept. B CINCINNATI, OHIO ° : Safe — Non-Explosive — Portable The complete Reddy Hot Soldering Outfit consists of the following: Large soldering copper, detachable handle — Fine soldering copper, detachable handle for oO u r rys a e delicate soldering—-Reddy Flo Household Solder (high est grade general purpose solder on market Can vill work 400 to 1000 miles if made by my plans Reddy Stik non corrosive Soldering Flux especially » tubes or batteries. Copyrighted plans $1.00. adapted for Radio — Can Reddy Prest Sal Ammoniac Satishied customers everywhere. Particulars free keeps tip clean and bright—Can Reddy Rub Abrasive LEON LAMBERT S30 Keut _ Tape for quick cleaning and polishing. Complete di auTman s- rections with each outfit eS Ask your dealer for the Reddy Hot Soldering Furnace and supplies. If not obtainable we will send direct a short time only, on rec eipt ol price. Cut Prices on Radio E. D. Fahlberg Mfg. Co. 25 to 50 per cent. Standard Sets, all types, $5.00 to Madison, Wisconsin 00. Everything in accessories Wiring diagrams and ites free 150,000 customers. Money-back guarantee. JOBBERS AND DEALERS: ediate delivery. Illustrated catalog on request. Special Write or wire for attractive tion to community agents. oo eases Radio Dept. 108 of 12. IMPERIAL LABORATORIES, Coca Cola Bidg., KANSAS CITY, MO. Two Salesmen Hit Salina _ Not Long Ago--- They were selling household appliances from **door-to-door’’ . . . But the doorbells didn’t ring loud enough ... . or ‘‘Papa didn’t love Mamma”’ enough ... .’ersomething! Anyway, Salina was seeeeeeeeeee eeeeee SSSR RG eee eee eceeeed the end of the trail. . . We started them selling E. D. FAHLBERG MPG. CO.., Madison, Wisconsin BECK-NOR Systems—a little ‘‘fool-proof’’ ac- Send me prepaid one Reddy Hot Soldering Furnace for counting system for merchants, that is sweeping which I enclose $1.50 the country. And these two men—totally without experience in selling to merchants—each aver- aged above $100 weekly real money... .. We want more like them! Let us tell you about it. The Beck-Nor Co. 118 §. 7th Street, Salina ,Kansas

l a $ § § § . § § § § § $ s wee

My dealer's name is.... Signed: Name

Address. ...

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POPULAR MECHANICS ADVERTISING SECTION Bag FREE = OR entert ERNIER AND DIALS || PQ Ee ar —

It contains a ee bargains of everything In radio: parts, supplies, com- plete parts for sets, complete sets, etc., also a mine of very latest Information on all different circults, complete list of broadcasting stations and other valuable data. your name and address and we’ll.send FRE catalog. American Bell HAVE A VELVETY SMOOTHNESS HITHERTO UNKNOWN Loud Speaker They are made by skilled craftsmen — have the lowest With American Adjustable | losses and pea in distant broadcast with the least dis- Unit. Wonderful volume, | tortion. Home built sets using Nationals have received $ 95 clear reception. Speake Fat | . 2 - aod aode > itse . " 0- broad ste fre m Paris—3,600 miles, and code from Buenos itself without coaxing. yen 5 200 miles ile, $695" inch bell—made of non- ms » tw —e . ; vibrating material. | The condenser and dial chosen by Harvard University With unit |} experts to demonstrate the Browning-Drake set before | H of Other ,. HEADPHONES | | American Institute of Electrical Engineers — ~~ e RandolphSpecial’ SIZES OO! 005 00035 00025 argains P 2200 Ohm moulded PRICES: $7.00 $6.00 $5.75 $5.50 | Our catalog is filled with bargains headset, properly de DIALS ONLY 4° $2.50—3" $2.00 dike these. any ag | signed to give strong ai ay che res. af Ce TT Interesting Bulletin covering Browning-Drake Receiver Free. | og e prepay Charges ) Y and clear . recet 4 anything in radio before you see Biggest headphone va! sg not supply ¥ ee recess. 5S your Coats our catalog, FREE Service Dept. yo ever offered. ca not supply you, 7 J ° | The National Company, Inc., Cambridge 39, Mass. i= F-¥ bole] me)_ moe Telie, CORP. — = —— EER BL Ie oA Dept. 252 Ba ila teenie

Storage Battery | Band Saw with Motor Only $104 Anau TeRy FOOLPROOF- Complete with instructions os £ > ¢ 7A) ; « - +} ht 5 Sibnatins Pirates will A rare bargain - 2. 14 -¥ nh Dott. Saw. Staunchly bui and * 6”. Complete with 44 h. p. b ¥_£9-QPERATIVE MERCHANDISE st COMPANY ing motor $104. Ww ithout mot 96» pot Sold on Money Back Guarantee H t B DE Write Sor dé scriptive catalog W Ul ing ‘Bench Saws and Jo % o | W.& J. BOICE Dept. D-12 Toledo, Ohio he ADYNE ,

Ti SUPER-HETERODYNE Have you 32-page illustrated book with detailed begun yn pres on one. winng, assembling and operating Model L-2 Ultradyne ll ti secures Latest authentic edition by CO ec in E.. Lacault, A:M.1.R.E., inventor . the Ultradyne, the most selective | receiver known. Write for Descriptive Circular. PHENIX RADIO CORP. 3 Beekman St N. Y. Broadcasting | Station Stamps? See your radio dealer or write to us. The EKKO COMPANY 111 West Monroe St., CHICAGO

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POPULAR M stations. One stage tuned r.f amplifier. 2 amplification, detector, two stages cation Has a.f. amplification Solid mahog- . — any cabinet. Value beyond dupli- at anywhere cation at $54.50. $29.50. wonderful Model R-3 is the three-tube, long speaker set that such a and log wave lengths 150 to 625 meters Detector acts also as a tuned rf stages a.f. amplifi- loud plicity, volume, range or clearness all near its new Miraco Miraco Model R justly deserves its title, “* Radio's finest low priced quality receiver One tube acts as a tuned radio frequency ampli fier and detector combined. A great distance getter Easy to operate and log. Covers all wave lengths 150 to 625 meters. Like Miraco sets, it uses storage battery or dry cells. Never such value before at only $14.35. sensation Covers equal for sim price of

Je re Iletins| € bu or order os fag (eT this ad NAMI ASSEMBLED Jealer ADDRESS

factory- « MIDWEST RADIO CORPORATION, Pioneer Buliders of Sets 407-D East Eight Street, Cincinnati, Ohio. Send free literature and full particulars about Miraco products Jobber ) your complete line of Agent ) User

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25,000 TO 1,000 MEN BIG PROFITS TO LIVE RADIO FANS We have developed a World Beater. A five-tube set that has no equal in simplicity of operation, clarity of tone, range or volume, all of which is attained without critical adjustments or complicated parts lo enable our agents to make the greatest possible profit, we are selling these sets fully assembled but not wire The efficiency of a Radio Set, ne matter how good the parts or wiring system, is entirely dependent on the correct placement of the parts and arrangement of wires. These details have been carefully worked out in our laboratory, and if you follow our diagrams and blueprints, you cannot go wrong, and our simple but complete instructions make this easy for anyone We will train 1,000 Radio Fans in wiring and Sadjusting our sets to fit them to act as our agents and representatives, and handle the rush of business that is bound to come from the quality of our product and the volume and character of our advertising rhe Retail Price of the Blue Seal set as above described with engraved panel, and a beautiful cabinet, is $90.00. lo those able to devote all or part of their time to the sale of Blue Seal sets, we offer a liberal agent's discount. In addition to this, an excellent income may be derived from the wiring of these sets for our customers. We want real HUSTLERS, and while our regular margin of profit and the income derived from wiring the sets sold is very attractive, in order to select and finally make permanent arrangements with the best of our agents we are offering $25,000.00 IN PREMIUMS AND BONUSES BASED ON VOLUME OF SALES WRITE TODAY for illustrated circular and full details which may be the means of putting you in a permanent and profitable business If you are not in a position to become our representative, but want the best radio set in your community, we will supply you direct until such time as a local agent is appointed. BLUE SEAL MANUFACTURING Co. Dept. 3, 1406-08 South Michigan Ave. Chicago, tll. Certified Leaks Absolutely accu- rately calibrated, permanent fixed resistance units from 4 to 10 megohms. Price 50c. ET Clear, Distortion- less Reception. Distortion, weak signals, lost signals are almost always caused by inferior cmall arts. Protect yourself fromdisappoint- ment, insure getting Distance, Clarity and Volume By using Electrad radio parts. Money back guarantee they will im- prove your set. Electrad Parts on sale at re- USE THE AUDIOHM for clarity and volume control Kills distortion Put one across the secondary of your transfor- mer. Price $1.50 with adjustable bracket. POPULAR MECHANICS ADVERTISING SECTION ET ANTENNA liable radio stores. Sold direct if dealer cannot supply you. LAMP os Just plug in on any electric light Tine; no need of out- door or indoor aerials. Simplest, neatest, most efficient in market. Price 75c. ‘ve ) VARIOHM INDORARIAL Hang or lay any- where, roll up when not in use. Won- A variable grid leak. Will give derful directional you exactly the correct grid effects, cuts out resistance. Any resistance from 4 to 30 megohms. Made to fit standard Dubilier Con- denser. Once set is perma- nent. Price $1.25. ELECT RAD... 428 Broadway, New York local stations. Use as ground. Price $1.50. HEAR MUSIC 2"4 TALKING § 1000 MILES AWAY New Radio Set Has No Outside : Wires or Storage Batteries ' The new Trans-continental Radiophone which is the most simple, and the clearest toned radio set you have ever listened to, is the invention of Mr. Coats, of Chicago. This radio outfit is different from all others.No outside wires needed ee erts, singing, and speeches. Get the market re- Dorts, latest news and sports by radio. Mr. C wants to place one of his amazing new radio outfits in each ay and is making a special reduction of 40 per cent for the first outfit laced in each community. rite mr. H.N. Coats, 338 W. 47th St., Chicago, for hie » i i e and be May yh Ty It sells on sight A two-minute demonstration will sell the nationally advertised Whisper-It Mouthpiece wher- ever a telephone is used. Andyou |wWt-//2 make 100% profit on each sale, Unconditional guarantee of satis- faction or money refunded pro- tects you absolutely. Write at once for the Whisper-It proposition. P. M. Colytt Laboratories 565 W. Washington Street, Chicago 6 a a SOLDERALL METAL IN PASTE FORM — RADIO DEMONSTRATORS WANTED MAKE $100 WEEKLY — NEW WAY To Get COMPLETE RADIO FREE ‘cr $15.50 Get this complete radio genuine vacuum tube receiving complete, direct from factory. Wired ready to om Demonstrate its long range receiving powers—a! results. Makes quick sales. Get yours for nothing W commissions. Comes complete with panel, cabinet, dia loss condensers, coils, rheostat, jack, head-phones, | supertron tube, aerial. Receiving set $15.90—complet« accessories $23.90. Make big money demonstrating sets. Write for free details and selling plan. To get se' No Money—just name and address, stating whether y' just receiving set or one complete with accessories. P: man amount on arrival. Money back if not satisfied quick—be first in your locality. Rush name and address STANDARD RADIO COMPANY 921 Broadway, Dept. P. M. 12, New York, N. Y Wri Not a SEN| BEARC bh

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POPULAR MECHANICS ADVERTISING SECTION List of Standard Parts x18 Drilled Radion Mahoganite snel engraved in gold. Brunswick Low Loss three-circuit runing Coil, enuine Brunswick Low Loss Con- enser, unswick Triploid Mounting Socket nd Binding Post Strip. srunswick Cast Foundation srackets. 2 Brunswick Jacks with Gold-plated onts; 1 for phones; 1 for loud peaker. reshman Mica Grid Condenser. tandard Glass Enclosed Grid Leak. 2 30-ohm Shacton Bakelite Rhevstats with Gold-plated Indicators. foulded Mahogany Dials grained to atch panel. engths Professional Round Bus- ir. Special Blueprint for this circuit. ‘ot an ordinary hook-up, but a ear picture form that a child can THE NEW “SHACTON” 3-CIRCUIT RECEIVER Coast to Coast Range, Complete Parts for Building SEND NO MONEY ‘Zi ACCESSORIES Everything needed to operate after building is listed here: 3 Type 201-A Tested Tubes. .. $10.35 1 60-ampere Hour Storage Bat- tery 11.25 2 45-volt Extra Large Enco “B” Batteries 6.50 1 pr. 3000-ohm Head Phones | |= Seeysaaee 75 1 Phone Plug, Double. .:.: : -90 1 Antenna Equipment. . 1.50 Complete Outfit $34.25 (Parts Also Sold Separately) CABINET FREE Order Building Kit and Accessory Outfit both together, and we will send Fine Mahogany Finish Cabinet FREE. ERLA We carry the most complete stock of Erla pares and Erla factory sealed kits in the country. Send for catalog. I will pay the postman the amount agree to refund my money inst: me oncesseeesees MAIL THIS COUPON NOW—SEND NO MONEY soeccecenccceed RADIO SHACK, Dept. 927, 55 Vesey St., Please send me the new Shacton Three-circuit Receiver I have marked If I am not satisfied I will return it in 5 days, and you LOW L OSS THROUGHOUT This receiver maintains two prominent features. Air insulated, with Low Loss Coil, gives you all signal strength possible. The heav y wiring throughout lowers resistance to a minimum and enables fine, sharp tuning New York, N. Y. When it arrives is ark Choice in square Peeekseeeeeeennay nderstand and make. (A) Complete Building Kit $27 (B) Operating Outfit.......... $34.25 All Assembled Ready * N#m®..--------.---- Wi > Address to ire City State LONG RANGE BEARCAT VACUUM TUBE RADIO ft From Factory to You Set with Vacuum Tube, all batteries, phones aerial, ground wire and insulators. Ready to operate, 2.88. W; ( RL. D’S latest, most amazing radio discovery. “Truly wonder- say experts. BEARCAT gives distance and tone of expen- Moet selective set ever built, bar none. In Chicago, with five stations on, AT brought in stations clearly 1000 miles away Outside of Chicago, set to use—one dial controls ali S¢ ception ” RKNJ [eg BEA OA World's most piticient nnd towent ‘priced receiver ; ind Not a Crystal Set £,res\ coun, She el sosrety cer poet, oat TED wt like BEARCAT. Beautiful mahogany finish cabinet. All batteries “fit inside. Hear mar x! = pews every 30 minutes day and night; music, opera, dance serv: election returns. Get a BEARCAT — NAY] SEND'NO- MONEY rede DEALERS AND AGENTS Wanted BEARCAT RADIO CO., 646 North tatchigas Avenue, San. 23, CcCAGO T° = Blow 5.50 R y T For the Man Who Tinkers A practical torch for the practical man. Self blowing, lights instantly, burns with a blve hot flameand is absolutely safe. Complete soldering set: Heavy duty soldering irons, Jiffynon-corrosive flux, string solder, Jiffy Blow Torch Dealere: Write complete with accessories. $4) SO for Proposition! At your dealer's or direct Apex Stamping Company Dept. EY Riverdale. Iil. U.S. A. . State St. 509 S Dept. PM-6 CHICAGO, We guarantee our new 68-page RADIO Catalog will save you money on brand new fully guaranteed, nationally advertised radio appara- tus. e buy up manufacturer's and government surplus stocks, jobber and dealer bankrupt stocks, ete. Our enormous buying pow- er permits us to pay spot cash and get rock-bottom prices—even way below manufacturer's costa. That's why our catalog is cram- med with thousands of wonderful radio bargains. That's why we GUARANTEE to save you money

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180 POPULAR MECHANICS ADVERTISING SECTION Announcing MUSETTE “The Stradivarius of Radio” NEW and better loud speaker with marked refine- ments of design and a superlatively finer tone over the en- tire acoustical range Reproduces voice and all instruments with a remarkable fidelity Hear MUSETTE at your dealer’s Your dealer will poay demonstrate MUSETTE Hear it today at his store. Note its cast aluminum base and throat — its polished Bakelite bell—its three superb styles, black, silver and gold the latter with maroon bell Catalog FREE If your dealer cannot supply our 48-page catalog of all Frost-Radio products, write us direct for your copy Address Dept. 14F 437 HERBERT H. FROST Incorporated 154 W. Lake St., CHICAGO Get Distance with Howard Guaranteed Parts Rheostats, Potentiometers, Sockets, Phone Plugs, Fixed Condensers, Binding Posts, Soldering Lugs, etc. HOWARD RADIO COMPANY 4248 No. Western Ave., CSASS, LING Wt a CROSLEY. Better -Costs Less Radio For ease of tuning, selectivity and long distance reception, you can’t beat a Crosley. Actual performances prove this day in and day out. Here is what one of the many happy users say: Dallas, Texas ‘The set, Model 51, has already surpassed my greatest expec- tations. On the night of Se ptember 13th, Oakland, California, was received with sufficient volume to be clearly heard throughout seven rooms. Kansas City, Chicago and many other stations were received with respectively greater volume." (Nameupon request.) BEFORE YOU BUY—COMPARE. YOUR CHOICE WILL BE A CROSLEY Crosley Regenera- tive Receivers are Prices West of licensed under the Rockies add Armstrong U. S. Patent 1,113,149. Crosley two tube model 5 With tubes and Crosley phones.................-+- $30.25 For sale by good dealers everywhere THE CROSLEY R ADIO CORPORATION Powel Crosley, , Pres. 1215 Alfred St. Cincinnati, O. Crosley Owns and Operates Broadcasting Station WLW Moore Original RADIO- Not new, but proven the best of ‘“’em”’ all. Ask any user. “All Wave Tuner” NEW YORK to FRISCO, clear as a belli The only one control tuner, 200 $150 to €00 meters, complete with hook-ups mailed anywhere. — Write today for our Big Free Catalog leading radio receiver accessories. All makes fully described. 50% savingz—a ELECTRIC SERVICE ENGINEERING CO. Dept. Radio P. M. 337 W. Madison St. Chicago, ti. New in principle, new shape, new in quality « reproduction, price $27 Made by the makers of famous N & K Head Set, M - LouDSPEAKER D, 4000 ohms, price $8 TYPE W TH. GOLDSCHMIDT CORP Dept. M-12, 15 William Street, New York MAILED ABSOLUTELY GUARANTEED »-+ D-201A, D-200, D-199, D-12, in ° standard sizes to fit any socket } The internationally famous ¢ J Dutch Radio Valve : : + will be plus mailed tore postage ! Three sent for %. 50 plas ; postage (any tyT : Approved by Popular Radio + laboratories. Order from nearest point. ¢ ST. LOUIS RADIO TUBE LABORATORY 3572 Olive Street St. Louis, D. B. ¥. PORTING CO. ' Dept. B, 515 Orange St, Newark, &. J, ry FOR ANY CIRCUIT IN ANY SET. “YOU CAN'T BEAT THE DUTCH

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POPULAR MECHANICS ADVERTISING SECTION sor. AGENTS use and introduce 1XLs. Make big money part or full time. No capital or experience needed. NEW INVENTION ENDS MOTOR TROUBLES kes fouled or broken spark plugs fire perfectly, banishes imping troubles, carbon knocks, coughing, jerking *‘miss- and pounding bearings to pieces. Makes autos run slower rh gear, have quicker pick-up and greater power on hills. s report gasoline consumption greatly reduced. Put on ken off any car by anyone in three minutes so try a set on car at our risk. If not satisfied, trial costs you nothing. niG CASH PROFITS—QUICK AND EASY 2 A DA up to $15,000 a year being made by I1XL $1 representatives. Botsford sold 4600 in one t Territory being anapped up fast. Write today for introductory offer UNIVERSAL MFG. & SALES wO. rept. P 552 W. Harrison Street CHICAGO, ILI Magnified 22S Diameters is what the tip of a fly's leg is like when seen through the ULTRALENS MICROSCOPE Any amateur can immediately start using his Ultralens to examine the edge of a razor, the mesh of a cotton shirt, the bacteria in dirty water. No technical training required, yet hundreds of sci- entists and teachers are using this in- strument. Gives enormous magnifi- eation and perfect definition. Send $7.50 for complete outfit Send for descriptive literature. nplete Outfit SCIENTIFIC APPARATUS CORP. Prepaid Dept. 209 MILTON, PA. ABETTER “S 2) x= BLOW TORCH Absolutely Sate! % t Burns gasoline or * erosene. 400 degrees more heat. Simple to iperate. 11 patented features. Used by_ex- rtsand biggest shops. Fear- ly guaranteed. Get yours No. Wanted AND MAIL TODAY Protect-O-Tube absolutely pre- vents tube blow outs. Savesits § cost many times over. One on each B-+- pro- tects your set. Money back guar- antec. y 5 bs w Nothing else like TY _it on the market. ~ Not a fuse, cannot A wear or burn out. Lasts a lifetime Fp for yours today se coupon. Dealers and jobbers write for Send No Proposition. Money Mai . The Don-Mac Co. Dept. J PS eee f 29S.Desplaines St.,Chicago, Ill. [| —Pay postman On arrival, COUPON CLIP THE Address RP day —, your hardware $Q25 Containing a full line of complete outfits and parts hans a , at exceptionally low prices. Write immediately to — Send for Complete Catalog. Postpaid Industry Ave., SYCAMORE, ILL. The World's Largest Exclusive M ‘ers of Blow Torches, Fire Pots and Brazers Save+Cost of New Tubes VACUUM TUBES REPAIRED Guaranteed equal to new. Send in your burned out or broken tubes by P.P. All repaired tubes returned P. P.,C.O.D. We try to repair and return within 48 hours. Harvard Radio Laboratories 200-204 Old Colony Ave, So. Boston, Mass. Detectors Aen, fiers UNITED RADIO SUPPLY CO. 1346 S. Michigan Ave., Dept. R-1, CHICAGO, ILL. HONEYCOMB COILS The Universal all-wave induct- ance. Back andfront panel mountings. Send 25c for Super Het., R. F. and Honeycomb Coil Circuits and Complete Catalog. Chas. A. Branston, Inc. 853 Main St. Buffalo, N. ¥. Chas. A. Branston, Lid., Toronto Heres START YOUR OWN how to make cnarcing BUSINESS ; 4 & Only $35 cash brings you HB 8-hour charging outfit. Easy Bigger Profits ~ ee eR tg terms. Let your profits pay balance with nice surplus besides. Slowest Winter Thirty day free trial on money-back guarantee. HB patented voltage-regu- lating winding absolutely prevents reversing. Saves current. You can easily clear $150 to $300 every month. Hundreds of HB users, with no previous experience are making big money. You can, too. HB 8-hour Charging puts your shop ahead of competition, draws trade. Write today for Bulletin 127. HOBART BROS. CO. Box M120 TROY, OHIO

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POPULAR MECHANICS ADVERTISING SECTION HOW TO MAKE THINGS Fascinating to any boy, yet practical enough for men with technical skill, the fow books of the NEW BOY MECHANIC LIBRARY have been recognized as the most useful books in any home. Their interest to the whole family lies in the fact that devices are described that are of use about the home, in the garden, shop, and in out- door sports and games of all kinds. THE NEW BOY. MECHANIC 3.849 Ideas What You Will Find to Interest You ir LIBRARY) Four Beautiful Volumes 3.917 Illustrations A faint idea of the world of useful articles in these books may be had from the following list of tl main subjects treated. books worth much Electrical devices Photography Carpentry Automobile Household helps Toys Painting oats House decoration Camping Drafting China painting Decorative metal work Fishing Furniture Farming Gardening Poultry Fruit growing Laboratory helps Models Magic Entertainments Musik Outdoor games Outdoor winter sports Stoves Radio Wireless Furnaces Tricks Puzzies Bicycle Flowers Hunting Trapping Library helps Metal working tools Secret locks Indoor games Kites Parachutes Plumbing Sheet metal work Pets Swings Look over this list. more than their small cost Hammocks Sleds Wood working Motor sleds Tents Skiis and skiing Indian snowshoe Power devices Toboggans Wind wagons Dog cart Water sports SEND NO MONEY library at the special price of $7 or four books in the library However, you may already have one or more of the volumes, want to complete the set by ordering the rest. Book 4 is brand new contains the latest articles on radi Send No Money Simply sign and mail the coupon sent to you at and indicate The book price of the books plus the few cents postage Phat is all cash with the order MAIL THE COUPON TODAY Simply send your name on the whether « selection of individual books ind you will be pleased with your purchase if you take tl ind will It » as well as over 3,000 other articles will be When the postman delivers them, hand him the If you want the books sent direct to a friend, it will be necessary for vou to send the Any one or two articles that interest you may make t! Decorative leather work Gymnasium iceboats Skating ittached you want the it $2 each The The Four Books $7 POPULAR MECHANICS PRESS Popular Mechanics Building, Room 712 . s POPULAR MECHANICS PRESS = Popular Mechanics Building, Room 712, Chicago, Hl. = Please send me at once C. O. D. the Boy Mechani = square); (or—the individual books you want) Book 1, $2; e 300k 4, $2 4 Name s City » Street Library at $7 State CHICAGO, ILLINOIS SCSSSSS SSS THES STS T SSS S SESS S ESHEETS STE SEE ESSSESESERSESSSEEEETEEE RE RERS SEES TREE REET ESTE EHH EERE ee (Put a cross Book 2, $2; O Book

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POPULAR MECHANICS ADVERTISING SECTION While you are giving— give health ‘THE greatest gift of all is health. You can give that priceless treasure of health to many this Christmas. Buy Christmas Seals. Everywhere are solitary sufferers and whole families stricken by the Great White Plague. Often they have no help except that furnished by the Tuberculosis Associations, which are financed’ by the annual sale of Christmas Seals. Give—and feel the joy that comes with giving. Buy Christmas Seals. They have helped stamp out half the ravages of consumption. Buy Christmas Seals, and help stamp out the dread disease entirely. 'HE NATIONAL, STATE, AND LOCAL TUBERCULOSIS STAMP OUT TUBERCULOSIS WITH CHRISTMAS SEALS ASSOCIATIONS OF THE UNITED STATES ADIO is revolutionized by this new re ceiver. A four-tube set whose range, using loudspeaker, is practically unlimited. Basically new, employing the new non-radiating Paradyne Circuit. Exquisite, natural tone. Extreme sensitiveness. And the simplest set ever to operate —one dial control. May be used either as a three-tube or four- tube receiver. Operates successfully with any standard tubes, either dry or storage battery type. Built as only Paragon sets have been built in the past. . And priced one third of what_you would expect to pay for such value. Ask your-radio dealer to show you this new receiver. Or write for descriptive folder. The New Paragon Four, $65 Probably the greatest value in radio today. Employs the ocw Paradyne circuit—non-radiating. New type sing i desi control, The New Paragon Three, $48.50 An exceptionally sensitive, selective, fine-toned receiver with amazing loudspeaker tone and volume over long distance range. The New Paragon Two, $27.50 es Excellent tone and volume on loud speaker from stations within moderate radius. Range for phone reception almosi ur limited, DEALERS: Write for attractive new Dealer Prop- osition and address of nearest Paragon Distributor ADAMS MORGAN COMPANY, Inc. S Alvin Ave., Upper Montclair, N. 3.

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POPULAR MECHANICS Right Away. on this Jazzy Sax No Knowledge of Music Nec- essary— Sweet Jazzy Tone You can play this beautiful imported Jazzy Sax without practice. No difficult scales and keys. Play by easy numbers or by ear (or by notes if you wish). Not atoy but a real musical instrument! Made of metal, handsome, glisten- ing, polished finish. Looks like regular saxophone—20 in. long Clear ringing tones and delight- fulharmony. Will make you popular at parties, dances 87 SONGS entertainments — every- ) where. No need to spend , im $50 or more when you can . . 5 \' own a Jazzy Sax for a ‘ rifle. Attractive Jazzy Sax - Cc af boy Bag, 87 Songs, ‘ Sax in afternoon and played and full directions abso- 4 lead in 9%-piece orchestra lutely FREE with each same night.’ Jazzy Sax on our special write Umtted offer. But you must ‘ Aas Sould play several get your order in at once! , a hin an Mail coupon TODAY sat SUPPLY LIMITED Send No Money Just fill out the coupon below. When the Sax and FREE Carrying Bag and the 8&7 Songs arrive, pay the post man only $5.98 plus a few pennies postage. Play the songs right away. don’t risk a penny. Satisfaction guaranteed or money refunded * But the supply is limited—so don't delay. Mail the coupon today r7 ——Send This Coupon Today—— WN FERRY & CO., 3224 N. Halsted Street ] Dept. 9779, Chicago, il. | Please send me at once your Jazzy Sax and FREE Carrying Bag . ‘and 87 Songs. On arrival I will deposit $5.98 plus postage with | the postman. If I am not satisfied, I will return all witbin 3 days | and you will refund my money .A. King writes: “Received Made of solid metal 20 in. long | Name p Adar SS State. 5 SIZE AUTOMOBILE TAP AND DIE SET, ONLY $3.00 DIRECT FROM THE FACTORY TO YOU! Our No. 12 Automobile Set furnished in oar highly finished cheataat box contains 5 each taps and dies (1-4, 5-16, 3-8 7-16 and 1-2” 1 die stock, and one and reamer wrench. 12 except that the thread is U.S.S. Le of ou are purchasing a splendid setata i low figure. = yous and be our many satis istomers. Let us as send you ene of our circulars Nao = fail line oo Handy Toots. ESTER STEEL PRODUCTS CO., DEPT. 41, 25 UNION ST., WORCESTER _mass. U.S.A. ADVERTISING SECTION Sales Agents Big profits. Gre vention enables h wives to COOK OIL in ordinary ex r wood range; HEAT wit} OIL in regular heating st; or furnace. Biggest s« now on! Big demand! Act at Once! OLIVER as BURNER —here’s your chance. Now. Right in your ook community, town, city, county or territory Selling this wonde rful invention! Tcannd Oli mixed with air. Makes any coal or wood range a real! gas range. Quick, clean, instant heat—at the turn of a valve. Bet- ter heat than coal or wood. Attractive profit on every sal every community goes Oliver National Tl ime) vertising in big magazines, helping y sell. Over 200,000 Oliver Burners alread sold! Guaranteed to give efficient service. A 15 minute onstration makes the sale. Every sale makes others. e is the time to start! Right now! 1 Ss what other men are doing. Get the of the winning Oliver Distributor and D« Plan. Real co-operation. A complete line. 12 Burner 1 —for Kitchen Ranges, Heating Stoves and Furnaces. | householder a prospect Get details of special attr Sample Case Offer. Write at once! OLIVER OIL BURNER CORPORATION Manufacturers of Oliver Oil-Gas Burner Products 1226 Oliver Bidg., St. Louis, U. S. A. Oldest and Largest Manufacturers of Oil-Gas Burner Products in the World NO MORE PUMPING UP TIRES An air-tight valve cap which prevents all loss of air in tires has been put on the market by F. C Hughes. With this valve cap one inflation last the life of the tire and doubles tire mileage. Tested and approved by leading automobik manufacturers. We furnish proof of tests. Retai price $1.25 for set of five. Great demand. derful opportunity for agents. Write at once to F, C. Hughes, 2504 W. Monroe St., Chicago, I!! FORD RUNS S7 MILES ON A GALLON OF GASOLINE A New Automatic Vaporizer and Decarbor which in actual test has increased the power! mileage of automobiles from 25 to 50 per cent, at the same time removes carbon from the « ders, is the proud achievement of John A. Stra 4302 Fourth St., Pukwana, South Dakota. A markable feature of this simple and inexper device is that its action is governed entirely b motor. It can be installed by anyone in fiv utes. With it attached, automobiles have from 30 to 57 miles on a gallon of gasoline Stransky wants distributors for his marvelot vention and is willing to send a sample own risk. Write him today.—Adv. “~ ee

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POPULAR MECHANICS ADVERTISING SECTION 1000 200\K«:. We Teach You How to Make It Money—bdig money: -is ‘waiting for you ‘to come and get it. No matter where you live nor what your ex nce, we teach you howto make money. pecial Proposition Open Now Go Sells Sight Fireite amazes everyone who single demon- if ~ children are astounded and fas- ry q cinated by the ease with which it i putes out an alarming fire. It is no gas g i exaggeration to state that Fireite ,et- J is one of the easiest to demon- , : strate and fastest sellers ever made. Why? Because it is so simple a child can use it with one hand. ft always works—(won- derful secret composition). No pump nor mechanism. Beautiful and long lasting. The low price is within the means of everyone— 50% less than most others. Sold to every home, school, garage, factory, office, store, hotel, etc., wherever shown AGENTS and MANAGERS WANTED ] In All Territory Not Taken Z You can make big money using R all or part of your time. We sup- ‘ ly everything for your success. ba his is an unusual opportunity DN for asound, substantial, permanent income. Write for our agent’s—or manager’s—special proposition lodaybefore itis withdrawn. jets FIREITE CO., Dept. 2, Masontown, Pa. ner As exclusive violin experts, ‘buying personally direct from individual European violin-makers, we offer + F $ selection of special values in both moderate and higher priced violins. Every instrument the work of an artist in } the craft. Tone quality and workmanship that will ap- | peal to those who want and appreciate true musical ‘ character. We also have a large collection of old L violins at a wide range of prices. Liberal examina- ; " tion privilege—extended terms if desired. Special is service on orders by mail. we } F Hew, endsomely illustrated brochure 5% Hy showing our exclu- } l\ ree sive selection, with prices direct to you and details of Teachers 1 i our special offer to out-of-town | Professionals i customers. Also contains valu- able information on how to { j and select your violin and how e { . care for it; gi an violin-makers. Sent free—no obliga- nm. Send for it today. proposition WM. LEWIS & SON — (Largest Exclusive Violin House) 225 South Wabash Avenue Suite 1779 Chicago, Illinois IN Use DO-ALL| || 7 IG SAWS & “yo 4 DRILL PRESSES ur dealer CIRCULAR SAWS nn up you, end us FILING MACHINES not s = ply daa é $s gat ee Can, be supplied in L . cor ‘ -p- r 5 ! arate models to eut | | fl , for Full size Can purchasers’ require- } ments . Chicago Solder Company Vy; Saws Wood, Bakelite, 4219 Wrightwood Ave., Chicago, II. Lt Light Metals, etc. Gentlemen: Send me one can Kester Metal Mender for For schools, model which I enclose 25c in stamps. and pattern (Postpaid anywhere in U.S. A.) makers, radio manufacturers Name Hundreds of other uses || Address Live responsible - Dealers, write us City DO-ALL APPLIANCE CO. Dealer Successors to JUNIOR MACHINE & MFG. CO., 859 No. Franklin St. CHICAGO. ILL.

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POPULAR MECHANICS ADVERTISING SECTION AGENTS MAKE BIG MONEY Selling Cadillac Rain-Proof Caps of Finest Woolens The water demonstration sells Cadillac Caps. It proves they keep their shape, their color and beauty and keep clean oe C E indefinitely because the y cannot be wet. More than 2 dozen No. 37 BI Y L SPOTLIGHT patterns to select from in all newest styles. Every cap made A Strong Beam of Light Where the from finest woolen fabrics equal to caps selling at much Rider Wants It When He Wants Jt higher prices. Every Cadillac Cap has solid leather visor full leather sweat band, tallored-to-measure Sold on A Bike Light That Equals a Good Auto Spotlight money back guarantee adillac invisible “secret process’ The . " aeaad 3 . makes Cadillac Caps 100% rain and snow proof. Our men The only truly Bicycle Spotlight on the market. Strictly higt make $5 to $25 and moré daily Get your money when you tals order. powered Not & common Bicycle light or marker, but & Spot We deliver and take care of all details. We give our saleamen 100% co- light equal to a good auto spotlight. Throws powerful beam of ver operation. Beyond question the most wonderful agents proposition on the light in any direction at will of rider. Head 4'% inches in « market. Send coupon for free sample of rain-proof fabric and full particulars. ameter. Improved bracket, fits any handlebar. Operates or ane CADILLAC CAP COMPANY, Dept. 912, 606 Woodward Ave., Detroit, Mich. two dry cells. At your dealer or sent prepaid for $3.75 con ct TTITITIIIT ITI IITifiiiiii iii itiiiiiiiiiiiiiiitiiiiititin plete (less batteries). Packed in Christmas wrappers—makes very appropriate gift : Please send without obligation to me free sample of material used in oy Cadillac Rain-proof caps, also demonstrating card and full information DELTA ELECTRIC COMPANY \ on your complete proposition to salesmen and agents. 100 Delta Block MARION, IND ' . Standard Makers of Auto Spotlights, Motorcycle Spotlights, Bicy Lam ere ee ee eee eeeceseseces eeee . Electric Lanterns, Radio Head-Phones, Flashlights and Flashlight Batt | New York Chattanooga San Francisco y OO ERO PS PO eS , | Export Dept. Faucette-Huston Co. Santord Bros 6600000 c0u 30 Water St. 311 Minna St wn No Carbon | RADIO CATALOG |. 100 Live Pages Bargains in e Contains interesting as Veli explanation of marvelous - Sets, Parts and Acces- benefits of H Ford Owners, you have waited for Radio which sories— Infor i this. Pays for itself first month. you may enjoy— Soll er cule eny's . can Doubles miles in gas on any Ford. told in re r saotien oF your mom ' first Owners say unlike anything they he von cheubd ast Don’t Delay ae ever saw, and marvel at its perform- it before buying. Send for It Today! local 50 ance. Prevents carbon; easy start- (And will you be so kind as to add the names of others in ri Sw ing. Burns superheated air; breaks up gas you believe will soon want radio goods? Thank you!) through carbon discs. No change in Ford con- LIBERTY M. 0. HOUSE Dept. 188-Z 106 Liberty St., N.Y. Me struction. Perfect combustion gives smooth running— oe adds life to motor. 12 year old boy can install. Absolutely at N 4 ntion No new principle. Sold on 30-day trial of satisfaction or wing ew nve 4 your money back. : Without cost or obligation we will send you FREE free literature explaining full details aad construction of this marvelous new inven- tion. Simply send name today. Unusual plan for agents. U. S. GAS SAVER CO. 200 Ryan Bidg. Kansas City, Mo, For Seekers of Health—Power—Beauty HI Generate High Frequency Viotet Ray, Mechanical Vi- e bration, Medical Sloststorey and Ozone— the four great est curat:ve agents. Combined or separate. They o1 erate on the electric light in your home or on their owr motive power at less than 50 cents per year WRITE Ask for the book on these a which has just been prepared. be sent to you without cost. Re-vitalize self Bring back energy. Be whollyalive, Write today Lindstrom & Co., 30 W. Lake St., Dept. 13-59, Chicago ** Would Be Cheap at $50”" ’ “T cannot see,” writes Mr. Haroid G. Gould, of Northome, Minn., “how Says Nat y Man such a glass can be sold for anything like the price you ask; $50 would be cheap enough for such a fine instrument. A 10-Power Megaphos Stereo-Prism Binocular for only ‘2.7 00 te By actual test this long range, Naval Officer type binocular equals the best German 10-power instruments selling for over $100. Large field of view with wonderful ill umination and definition. Weighs but 20 oz. Central focusing with individual eye-strength and width adjustments. Amazing value. Complete with case and straps, prepaid, for only $27. Guaranteed satisfactory or money returned. 8-power glass similar toa ove, only $18.50. Catalog Free—200 Glasses—G1 to $125 DU MAURIER CO., Dept. 2012, Elmira, N. Y. America’s Leading Binocular House

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POPULAR MECHANICS ADVERTISING SECTION The Mutual Security System The Most Efficient Sell- ing System in Existence IF you want to sell your business for cash quickly and privately, we take the prospective buyer direct- ly to you at our expense, no matter where located. We specialize in selling out-of-town businesses. If your business is worth $5,000 or more, write us. WC Accnumg, Yrgn The Mutual Security System Hl hon 68 W. Washington St, CHICAGO NEW INVENTION SAVES. $4.00 TON ON COAL What is said will revolutionize the heating problem mean a substantial saving on coal for the public is a recent vention controlled by B. E. Pearson, 155 E. Superior street, hicago, Ill., which is a perfected coal and labor-saving device r hot air furnaces, stoves and kitchen ranges. This coal | ex ¢ inates furnace care one-third, dust and clinkers as | well. So sure is he of the absolute success of this invention | t he guarantees at least 25% saving on coal and will send a trial. Owing to the wide spread interest it has created re, the inventor is seeking a representative in each wn to take care of the large demand. Any one interested in making big money should write at once for his special trial 00 Do it today.—Adv. OR MORE A MONTH Information on how you can earn $300.00 or more a month will be sent to the first person in each locality who writes. Become our local distributor for a recognized household necessity in rural districts and small towns. Easy work for Men or Women, Full or Spare Time No money needed. Million dollar firm behind i Write quick for particulars. State territory. H. E. JOHNSON, 609 West Lake Street, Chicago, Ill. PHONOGRAPH SENSATION! Send Neo Money. This is a remarkable offer! Real honograph, like picture. Guaranteed motor, Amer m: produces music clearly, and loud Plays regular 10-in. records. Durable and practical Double-faced record and pkge. of needles with each On .85 complete. Cash orders or Pius postage. Satisfaction guaranteed. SCHLITZ & CO. *7ii.ocione + 187 LC Smnbabros SENSATIONAL SALE GUARANTEED TYPEWRITERS only $4.00 a month and the machine is yours. This is abso- DUE ciara won ae be ot ans RAST TRIAL TERMS machine when you can pay $4.00 a month and own one. Think of it Buying a perfect, late model highest grade Typewriter at a bargain price—at only $4.00 a month. Silent Model me LCSmi No. 7 Famous This is the famous L. C. Smith typewriter which has set the wor!d's standard for quality and service for over twenty years. Perfect machines. Standard size. Has the full correspondence keyboard of 76 characters— single shift universally used in teaching the touct system. The entire line of writing completely visible at all times has the decimai tabulator, the two color ribbon, with automat reverse, the back spacer, ball bearing type bars, ball bearing carriage action, ball bearing shift action. Every late style feature and modern operating convenience. Comes to you with everything complete; tools, cover, operating book and instructions—nothing extra to buy You cannot imagine the perfection of this beautiful typewriter until you have seen it. We do the most perfect and highest class job of rebuilding known to the typewriter industry. We have sold thousands of these per- fect late style machines at this bargain price and every one of these satisfied customers had this splendid, strictly up-to- date machine on ten days’ free trial before deciding to buy it. We will send it to you F. O. B. Chicago for ten days’ free trial It will sell itself, but if you not satisfied that this is the greatest typewriter you ever saw, you can return it at our expense You won't want to return it after you try it, for you cannot equal this wonderful value anywhere SEND NO MONEY Order Now — Before They’re Gone When the typewriter arrives deposit with the express agent $4 65 and take the machine for ten days’ trial If you are convinced are that it is the best typewriter you ever saw keep it and after 30 days send us $4.00 a month until our bargain price of $52.65 is paid All cash, $49.85, just a little more than half its original price If you don't want it, return it to the express agent He will return you $4.65 deposit. We will pay the return express charges rhis machine is guaranteed just as if you paid $105.00 for it. It is standard. Over half a million people own and use these typewriters and think them the best ever manufactured The supply at this price is limited; the price will probably be raised when next advertisement appears, so don’t delay. Fill in the coupon today—the typewriter will be shipped promptly. ‘here is no red tape. We employ no solicitors—no collectors—no chattel mort gage. It is simply understood that we retain title to the machine until full $52.65 is paid You cannot lose—your deposit does not leave your home town unless you are satisfied. De net send us one cent. Get the coupon in the mails today—sure. waist WATCH [VE WE TRUST YOU GLADLY SEND NAME & ADDRESS Attractive jeweled wrist watch given for selling only 40 magnificently colored packets of highly perfumed sian Ga PERSIAN GARDEN { sock Sear aitt@pencband rem it acoording to offer explained in big premium lint as Great offer of five sweet, rare and lasting odors. Laviehly used to freshen linens, clothing, dresses, ete. One to five pack- ete sold in every home. We are reliable. Write quick. Be first in town. PERSIAN PERFUME CO., Dept. W.G.72, TYRONE, PA. SMITH TYPEWRITER SALES CO.. & 300-360 E. Grand Ave., Chicago, tl. Ship me the L. C. Smith Model No. 7, F. O. B, Chicago I will pay you $4.00 monthly as rent until the $48.00 balance of the Special $52.65 sale price is paid rhe tithe to remain in you until fully paid for It is understood that I have ten days in which t examine and try the typewriter f I choose not to keep it I w carefully repack it and return it to the express agent It ul den stood that you give the standard guarante¢ Name...... Street Address City State

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MILITARY BINOCULARS French and German 6 and 8 Power $19°° pPosTPAID Case and carrying «traps included Usual selling price $40.00 to $50.00. Wide angle—day and night lenses—6 and 8 power—prismatic type—finest achromatic lenses. Approved ‘or U. S. Army officers Guaranteed German war glasses made by the world's lead- ing optical manufacturers. Many of these glasses received direct from the ALLIED REPARATIONS COMMIS- SION. Sold to Army and Navy officers throughout the U. 8. A. Highest grade glasses—guaranteed the equal of any binocular made. Add greatly to the pleasure of motor- ing, yachting, mountain climbing, or hunting. Suitable for the races, bird study, etc We have sold thousands of dollars’ worth of these binoculars to the U.S. Army and Navy Glasses will be shipped promptly on receipt of check or money order for $19.50 with positive guarantee of full cash refund on any glasses returned ORDER YOUR MILITARY BINOCULARS TODAY HENDERSON BROTHERS Largest Importers of Field Glasses tn America 91 to 97 Federal Street Boston, Mass. for Fords the wings are always cool. The Crary Gaso- © line Cap works on the same principle—the ends of the spring in fig. 1 bite into the thread at the sides, hold- ing the ec ap tightly in eee The Gas Cap re- tails for 25c. Crary Caps eliminate sticky, tedious, inconvenient ye Write for complete information and agents’ proposition 7 CRARY CORPORATION — 3049 Northwestern ROIT —— Crary RadiatorCaps This beautiful nickeled radiator cap can be lifted by merely pinch- ing the wings together. It is easily replaced—simply reverse the opera- tion. No matter if the cap is hot— Complete with lock $1.50 300° Burroughs Adding Machine ONLY ONLY $9.50 DOWN— 50 9-Column Capacity — Positively the greatest bargain ever of- fered! Factory rebuilt by experts. Every machine peninet mechanically and in appearance. Carry same guarantee as a new machine. SOLD ON INSTALLMENTS Ont 50 down, bala id whil y $9. ae Se machine. Why un- dreds of well-known ir ur customers. 10 DAYS FREE Write us today and how thi any other standard make adding machine for 10 days, absolut ¥ Dalton, Wales erican sell them all . . Am we at one-third price. Don't delay, write NOW. ELIABLE ADDING MACHINE CORP. Dept. 42, 166 W. Washington St., CHICAGO, ILL. POPULAR MECHANICS ADVERTISING SECTION RAISE MONEY QUICKLY AGENTS, CHURCHES, SCHOOLS and SOCIETIES Perthosentainty dave, — ng our annual ad- vertising sale 25c pack ag Mendets will te sold to Agents almost at cost. This is an induce ment to have you make a specia! effort to sell Mendets to housewives not read: Ca Msgazine adver tisements. @ these sales, y: can make $15.00 ‘to to $25.00 a day churches clear debts and raise funds : schools andsocieties buy fur oe niture, radio sets. mend all leaks in all cooking utensils and Mendets rubber goods, without Heat, Solder, Cement or Rivet. Send for free sample package, or if you know Mendets, order today at following prices : 500 — 25c pkgs. at 9c cost you $45.00 — sell for $125,00— your profit $80.00 100 — 25c pkgs. at 10c cost you $10.00 — sell for $25.00. your profit $15.00 50— 25 pkgs. at 12\%c cost you $6.25 —sell for $12.50- your profit $6.25 20—25¢ pkgs. at lic cost you $3.00 —sell for $5.00. your profit $2.00 Collette Mfg. Co., Dept. F, Amsterdam, New York u IMPORTED SPANISH LEATHER. sewn CIGARETTE CASEY. Fine Xmas Gift! Entirely hand made in Spain. G brown Morocco. Highest quality one package cigarettes. Sent prey u $1 to introduce exclusive line of hand sewn Spanish leather. Catalog of 300 articles (50c to $4) FREE CALIFORNIA TRADING CO., Desk L412, 747 Warehouse St., Los Angeles. Calit waTER Shins OD Heavy winter (wool mixed) gray flann shirts, roomy, comfortable. Turned down collar, strong flap pockets. Sizes 14% to 17 (Extra large sizes 25c¢ ad ditional). Also Slip on Sweater, heavy) knit wool process. SEND NO MONEY. Sib when or shirts and sweater arrive.?Stete sizes. Mon back guarantee. International Commercial House 433 Broadway, Oept.80-F New York City 10 cents &w™ Brings you the famous “Gasotogy Chart.”" Auto Owners! Save Gas. Save $50 a year. This chart shows you at a glance HOW TO SAV F& AUTO EXPENSES on any make car. 150,000 now in use, SEND ste TODAY Dealers and Agents MPS Cox Investigate LIMITED OFFER Bullock Publishing Co. | Chart Sent Postage » Paid) 1503 E. 55th St., Chicago URA LINGERIE $1.0 OUMIED ON 4 Write immediately for full details of our liberal proposition. Every call a sure sal Every sale a reorder. rm experien-e r —_ We deliver and co! Your vay i ly. Sonate t. 10. Adair Mr Aheart RA TEXTIL ORP. 1674 broadway, Hew York 2 DAVE Your Feet thesd enssoveting aches and pains Don't exhaust rgy through borting feet. Wear our (Fully Patented) . Oe ie testi- . monials from doctors and users “Wefat Arch SepertCo,.551 HE Tavlr ip onl 0. | = ITI

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POPULAR MECHANICS ADVERTISING SECTION Xmas Gifts ite DIAMONDS CustomSit SAirts for Less than Ready Mades Bhirt salesmen--double your earnings with this wonderful shirt- making ides! New Idea shirts are guaranteed to fit like eustom- made. Big manufacturer has developed new system for drafting patterns, Astonishingly Low Prices Make Sales Come Easy Men used to having shirts made to measure will now order New Idea shirts from you, when they compare the prices. (thers will order c also, to get the custom like fit of New Fides shirts. Ten other wonderful features. Free initials-en insurance policy with every shirt--special shaped neckband--and other selling points. Over 1) fine quality, never-fade fabrics. Amazingly complete selling outfit with new photographic display lands orders like magia Remarkably Big Earnings For You We want full time men who want to make $5,000 and up per censon. If you qualify, we will establish territory for you, giving you exolu . sive rights. Commissions daily. Write to-day, as lines are limited. NEW IDEA SHIRT MAKERS DEPT. 1412 | Sex rs, Je ction o ring. Special Py ts No. 4. afin solf- re, large Reellike « latinum finish, ric py ea- graved, $3.27. CLNCINNATI, OHIO id fo PLAY A TUNE IN ea 10 MINUTES! f20i P fs © iele, FREE $C TM Sa, Tener, or Guitar. mers a ladies’ ring ae net be ha Cali _ + somely pierced e “ome ol ell | Sat play SBina’ysoreee, ma Fam : = mounting. $3.3 521) BOGa ap perce site == Ey “4 fun, moper pers Wass 3222 Wi Halsted St., Dept. 8779, Chicago, lil. : Palmolive Shaving C dimoiive avin ream + & norlfes “5 New Delights for Men” eurrounded ‘by it oe —~ a? a oe . . Ps - onds of. Book of Newest Styles just out. Womens, : : fing silver, hand ind plored men’s, children’s clothing om credit and at bargain ndchased: Bargain 53,9 ro prices, less than cash prices everywhere. Very latest y A. ‘Seat ing silver moupting, ns; best materials. Open a charge account with us. Buy on credit Reclike Diamond engraved sengules . ave money! Dress in newest styles. Send for Style Book absolutely sapphires on sid 3. in Ly FI ai FREE today! Elmer Richards Co., Dept. 1779, W. 35th Street, Chicago SEND NO MONEY !. ts ee . . yo ese rings for ins How to Become a Successful Automobile Mechanic sresten, pres gu That mechanic makes a good reputation who always knows pore igs fester how to do repair work the best way and in the least time, jer today. The specia Help to become such a mechanic is on these ringe may be 4 contained in Popular Mechanics Auto wo any day vw Repairman's Library of the follow- PRANTL JEW JEWELRY CO., 97-B Nassau St., New York od ng four books; ‘ Posssases ote i 1. Automobile Repairman’s Handbook FERBEND =I 2. Popular Mechanics Lathe Book ‘ ni ; T ffi C pe Sia 3. Drilling and Thread Cutting le raulic CO Wave Jaap 4. Automobile Owner’s Handbook A 0 the Air ~ These books contain 1,023 ideas for : fetes auto repairing and shop work. They Add a Ferbend Wave Trap tell how to make special tools, and to your set_and **Police’’ fixtures reception. Regulate the vate Send No Money—Simp!l rit A hy Ty en —Simply write a interfering statio e d postal requesting Popular Mechanics gO, SB. yn saan & Auto Repairman’s Library. When : ic? 2 booklet . the postman delivers the four books Ferbend Electric Co. to you, hand him $2 plus the few 15 E. South Water St., Chicago celts postage. - oc . Our BUREAU of INFORMATION will answer all ques — POPULAR MECHANICS PRESS tions regarding articles in this magazine. Address Popuiar Popular Mechanics Bldg., Rm. 711, Chicago, IIL Mechanics Magazine, Chicago. anaen Before You Buy an Engine Write tor the facts about the wonderful Edwards Farm Engine. Z x This marvelous engine gives from 1% to 6 H. P. Gasoline or kerosene. Light, easy to move, free from vibration. Requires no . anchorage. Easy — no cranking. Pumps, saws, grinds, 3 and does all chores. lenty of power for every purpose. i Low Factory Pric&e—FReEeE TRIAL OFFER — Tremendous value. Thousands of satisfied users. Write now for details and FREE trial offer on this amazing engine Edwards Motor Company, 118 Main St., Springfield, Ohio

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190 WOW the finest STOP WATCH Less then 2 of usual price And an all-round true time-piece, too F-xperts in scientific professions are using the Pastor Stop Watch in every field. The tremendous output keeps the price way down. All fiud it invaluable. It gives the time-fraction in every mechanical and chemical process, tells the margin between profit and loss. Fortunes are paid for this efficiency. All manufacturers demand such time-records. Make the Pastor Stop Watch your constant companion; ready for every need. It's an all-round watch, tells the hours as accurately as the seconds. Just press the button; it tells fraction-seconds. Press again; its hand stops; the record is made. Third pressure brings hand back to zero. GUARANTEED The Pastor Stop Watch is supremely accurate. Seconds are divided into fifths. The blue lettered dial gives highest visibility. It is the size of

ordinary pocket watch, only a trifle thicker Heavily nickel - plated throughout, it is staunch, handy, compact. SEND NO MONEY Just send us postcard telling us to send you the genuine Pastor Watch On delivery you pay the postman the small amount of $7.50 —actually less than % what similar watches cost. Remember, every watch guar-

Necessary for

anteed. Send today before the Efficiency Experts present allotment is exhausted. This ; ineers is the biggest bargain ever offered in tors such an accurate stop-watch and Mechanics timepiece combined. Athletic Trainers STERLING WATCH COMPANY POPULAR MECHANICS ADVERTISING SECTION Makes Autos Go 40 Miles on Galion of Gasoline Sioux Falls, S. Dak.—James A. May of this city nounces the perfection of an amazing device that is ena! car owners to more than double their mileage .rom ga used and at the same time remove «< ‘ery particle of from their motors. Many cars with this device attached have made over 40 miles on a gallon. Arthur Sollee of 8. Jacksonville, Fla., says: miles off a gallon." Chas. Luetzen of New Holstein Wis., says: “‘I made 11 miles on a quart of gas on one test, and 35 miles with three quarts of gas."" Dewey s Kagg of New Boston says: *‘I made 44 miles on a gallon of gas.’ “1 made 41 It is automatic and self-regulating and can be attached anyone to any car in a few minutes. Mr. May wants agents and is willing to send a sam; his own risk to anyone who will write him. Just send your name and address to James A. May, 1765 Lacotah Blde Sioux Falls, 8. Dak.—Adb». Why Burn Coal or wood when you can burn S in your stove or heater Ley | a 1926 Im- ete Kerosene | in “five minutes time,

brou . nd ren Fie Cast te 88 B t. Sells ight. Write tod: ap myth a ons eight ¥ ay pee com ad Ey Ie

OUTFIT Dept.212 15 East 26th St., NEW YORK CITY Complete $9195 RADIO ::: Long Distance 1-Tube D. K. SUPERIOR Set Com- plete. Nothing Else to Buy. Produces astonishing results. Receives music “epecehes, information, instruction, sermons, etc. ,fi ou, from broad- casting stations hundreds a ~ ies away, often more than . Easy to cperate, Cheapest means of entertainment ever devised. No knowledge of radio required. No electricit except supplied by dry auete included in offer. Satistaction Guaran ae on $21.95 for all Parts — accessories compote ee fa ad- vance. Your radio ques’ ions answer: free. Send for 100-PAGE RADIO BOOK FREE Crammed full of valuable information and offers of radio ects and parts at cut prices. Investigate. Don’t delay. Write teday. And will you be so kind as to d the names of several ot vou believe will soon want radio goods? (Thank you!) LIBERTY M. 0. HOUSE, Dept. 189-Z, 106 Liberty St., N. Y. C.

PERSONAL STATIONERY 200 SHEETS AND $4 OO 100 ENVELOPES Printed With Your Name and Address Clear, white bond paper, with envelopes to match. Your: and address printed in beautiful, rich blue ink, on both p and envelopes, and sent to you postp: = for only $! W of Mississippi River and outside of U. S. $1.10.) If venient to send the money, we will ship c.0. D. M returned if you are not more than satisfied. Order Write name and address plainly. Agents make big money taking orders for us Write us today for our agent’s proposition Elite Stationery Company Zmernrorr. ea.

®DARN-IT-ALC 2 (© Dhe Magic Mendey Darns stockings, mends clothes, patches all fabries, rubber and leather. Does away with drudgery of darning and mending. Does the work cheaper, easier, quicker. Stands repeated washings. nd 50c for full size tube. Money back if not satisfied. Agents oo.o"s" Dept. P.M. DARN-IT-ALL COMPANY 1524-34th St., Des Moines, lowa Stop that ruinous chatter or wher on your car. MAKE THIS take out your floor boards, pull your poe. oe brake back and forth. If you nx »tice play at the ball joint, you need Bredar’s Ball Shim. Price $0.90. Ask your Dealer or send money order. We will ship prepaid. Nic Bredar’s Son Mfg. Co., Rock Island, Ill.

ourself without capital. Exclusive Territory on guarar Radiator Cap Condenser and Indicator of engine trou “Tesi Alcohol—Prevents Freezing and Overheating. Fa all year round seller—for every automobile. Wonderful portunity for Agents—Quick Sales—Big Profits—no ex perience necessary—work full or part time. Write Soiee | SENTREE, 609 N. LaSalle St., Chicago TAILORING $50t0$100aWeek A GEN T If interested in a good unity to ane big money let us send you WANTED :: ‘amous book, “‘What Others Say.’ § ait tells you about our new pisteres f scores of men whom we have trained edad helped id uild a permanent big paying business. Our pays big Profits. Success is sure for Get Into Business| |

wate. " and overcoats at every, carport tailored to order, from all wool fabrics are well gnown es i world’s — clothing values. They are easy all. protect te commigsion in nhoamne. Write for os w sales bilan and ST ae 843 Adams St., Chicago

WADE

LATHE AMATEUR MECHANICS, MODELMAKERS, INVENTORS, STUDENTS A real machine tool for the home work bench — ca pacity 4" dia.x12" BENCH oh * line -"Theand Cutting. Accurate — Strong — Quiet — Compact. has travel entire length of bed. vork Price $28.00. THE GEROLD CO., Dept. P-3, 120 Liberty St., New *' sition Materials — Turning— ‘acing —Boring—!? S Leadscrew inside bed. Send for litera

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—< . PSs v9 bP? S wt ‘eh “NTS

POPULAR MECHANICS ADVERTISING SECTION 191

o Money Down 7 FREE TRIA 30 Days’ F TRIAL! Sal Never before has any farm or shop engine manufacturer made a bona fide no-money — _ down offer on his engines, We are daring to make such an offer because w 7, oo e kn -_ OTTAWA Engines will do We want you to prove to yourself that the OTTAWA is ky _ b__/ engine to start; uses less fuel and does more work per h-p. than any other engine youeversaw. (@eeus NOT A CENT DOWN <.:°3c: DIRECT FROM FACTORY

oa would like to try this engine is all we as’ We don’t buy our e ngines from someone else You do not send a penny down— you have no and then A. Fd toyou. We build them in our own plant. papers to sign. After you have tried the en ne We know just what goesinto them and we testevery engine right at your own work for full THIRTY DA three times bef: money then send us the small payment of $4.95 a Ss test it, Then pay for it ia SMALL MONTHLY PAYMENTS. raat gear. OTTAWA ENGINES Run on kerosene or gasoline without changing. New patente od Venturi makes the OTTAWA easier to start. Throttling governgr, WICO Magneto ignition. Thousands upon thousands of shopmen and farmers will only use the OTTAWA. It is the most reliable engine and will last longer. Inves- tigate it now before you try any others. It costs you nothing to test it 30 days,

Just send your name and address on a post card for the New OTTAWA Catalog. It’s yours FREE. We want you to have this book before you test any engine. Find out about this Smallest monthly payment ever made trial offer before you choose an engine. WRITE TODAY. an9 = H-P. engine—othersizes 24 to H. C. OVERMAN, President -P. at proportionally low monthly payments—a whole year to pay if you OTTAWA MFG. COMPANY want. No interest; no C.0.D.; no mortgages 538-H King Street, OTTAWA, KANSAS te sign. Get full information, now. Desk 538-H Magee Building, PITTSBURGH, PA.

Send For Our 1924 FREE BOOK OF BARGAINS Containing a full line of bodies and accessories at exceptionally low prices. Buy direct (\\"n the factory. AUTO TIRE SALES CO. ss < Body Division Dept. P27 1346 S. Michigan Ave., Chicago

Protect yourself against hold-up, rowdies, etc. with this clever cigarette 7 of light weight metal. Looks exactly like the real thing! Pull the trigger, back flies the lid showing your cigarettes. Lots of — scaring your friends, is

MAN $1.79 on de- ——E Overy plus postage. ee Pending y back if not satisf PATHFINDER CO., Dep, KBB 534 3 Sixth Ave., Nut h

FuRNACES RANGES HEATING STOVES And many other Purposes

OXO.-GAS, the cheapest, cleanest, most efficient fuel known to science is made from kerosene or distillate, and air, mostly air. Burns with a pure blue flame of high heating intensity, as silently as city gas. Over a million in use. Manufactured by the oldest (est. 1906), highest rated and most responsible corporation. Ask any bank. Send for Catalog illustrating and describing twenty different, distinctive designs of oil burners for Furn- aces, Cook Stoves, Heating Stoves, Base Burners, Hot Water Heaters, etc. AGENTS Some choice territory for OXO-GAS € WANTED agencies still open to thoroughly respon- sible parties. Your own locality may yet be unassigned. GLORIA LIGHT COMPANY 111-12 N. May Street . . Chicago, I11.

types for all purposes.

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At Last! Radio That Satisfies the Music Critic CHICAGO DAILY NEWS EDITORIAL ROOMS &. B. Rauland, Pree. Reuland Manufacturing Co., 2660 Coyne Street., Chicago, Il}. wy dear ur. Reuland: £ want to express ay great pleasure in witnessing the reoent test of amplifying transformers in your lab- oratory, and in selecting, from different instrumntse tested, the one shich seemed to m= to reproduce most exactly the artist's original tomes. I sas indeed gratified to learn, after the tests, that the instrue ment which I had repeatedly selected as by far the most successful in reproducing, not slone the music, but even the very personality of the artist, sas none other than your own new "Rauland-Lyric” Transformer. I feel confident that music lovers everyshere *1ll appreciate the contribution you have mde to their enjoyment in the creation of this reproducing ‘tnetrumnt. Very truly yours, ° Busio Critic, Wbagy Mail, Aourg In placing his mark of approval upon Rau- land-Lyric, Mr. Maurice Rosenfeld has in- vested Radio with a new beauty and dignity. You can have, in your home, the amplify- ing instrument which has been commended by eminent critics. Rauland-Lyric can be installed in your present set, or one that you may buy, to replace any ordinary audio transtormer. Ask your dealer. Price, $9.00. The RADIO KEY BOOK contains the clearest explanation ever given of the na- ture of audio amplification and equally valuable discussion of many other sub- jects in Radio. Sent for 10 cents, coin or stamps. RAULAND MANUFACTURING COMPANY PIONEERS IN THE INDUSTRY 2656 Coyne Street . Chicago, Illinois . RaukigdeLonic pr” AM ERI Cay TRANSFORMER | POPULAR MECHANICS ADVERTISING SECTION What I Learned About Old Age iz = ’ By Byron C. Kelley, | fl A.M., LL.D. t * I recently had the most sta: | ¥ tling disclosure of my life or the subject of old age. | approaching 40 years old m) self. I had begun to wonder if I would. soon begin to “‘break’’—to lose my old-tim« pep and aggressiveness, staminaand resistance agai diseases, like most other me: of this age. I wondered I would soon be subject to t! class of ailments which seem so prevalent amon; men past 40. Then, through a mutual friend, | mad the acquaintance of a certain scientist, a member the American Association for the Advancement Science, who has recently brought to light most i teresting facts about the peculiar conditions con mon to men past middle age. 65% Have Gland Trouble I learned that 65% of all men past a certain mid age have a disorder of a little gland, called Prostate. And prostate disorder not only is 1 direct cause of much distress, often necessitati operation, but it displays itself in many part the body. Common Middle Age Ailments Here is an important cause for many ailments which her: have been simply ascribed as “old age"’ symptoms—s aches in back, legs, and feet, frequently nightly risings, nervor ness and irritability, often go along with it. And I learned how by an oshendininale simple new method, that these dis could be eliminated in a short time without drugs or oper —by an amazing new treatment that reaches this gland di yet is so convenient that anyone can apply it in ther ow home. 10,000 Men Find Relief But most surprising of all, I found that 10,000 mer already found relief through this amazing discovery. 5 men, bankers, lawyers, doctors in every section of the co are using and endorsing the method. And it is within the of every one. There are no drugs, no books, no electric | Explained in FREE Book If you are troubled with any of the disorders mentioned have chronic constipation or Prostate trouble, you should the facts about this discovery at once. A vitally inter book written by this scientist called “Why Many Men Ar at 40,” will be sent free if you request it at once. It des this splendid treatment and shows how you may regain of your youthful vigor and be free from certain disorder obligation. But write at once—the edition is limited mail request to The Electro Thermal Company, 2140 Street, Steubenville, Ohio, the concern that is distributing books for the author. Western Office: Dept. 21E, 711 Van Nuys Bidg., Los A: Calif. » Wi ay Kes | sae i'! 26) #: mo li2

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7d POPULAR MECHANICS shhh wom Coles mle l-F- 1. Into Profits Whether you are interested in light manufacturing, repairing imental work; whether you are a mechanic, engineer, or stuc de ont; whe ther you work in wood or me tal, your n be turned into profits with accuracy, speed and on he BafyRrang, Lathe , practical lathe of small size, high quality and at low ( pe ration same as large lathes. Made of selected ma- y skilled machinists who special- the building. Quantity produc- 1ins the low price. Not a toy practical machine for all small Hundreds in use in shops large " ill the country over. Sold direct tory to you on positive money- rantee. We also make Bench 1 Grinders. The Watson Mfg. Co. 12 Watson Bldg., Toledo, Ohio, U.S. A. MakeBig AGENTS 5 Selling D-REX-U Safety Signal to automobile owners; complies with safety laws; guaranteed. Write today ¥ for wholesale price to agents and get y territory quick. Big Winter Seller. Address Comstock-Bolton Co., Dept. K Kansas City, Mo. ABetter Shave 37 1925 E. 15th St., or your money back that's my Guarantee »” v Ldgemaker matter what style razor you use or how tough your beard, guarantee you a better shave with— The MERCURY Edgemaker Puts keenest barber edge on any razor or blade in a jiffy. Lasts w years. Anyone can use it. Guaranteed harmless to finest sor. Thousands of satisfied users. Grab This Special Offer NOW! ta Mercury Edgemaker NOW at regular agent's price on suarantee of satisfaction or money back. No better Xmas gift n a Mercury Edgemaker for any man. Gives satisfaction day in the year. This special offer settles the “what to wroblem. Styl Agent’s Price (-1—For straight razors. Regular price, $2.........+++. $1.25 E-1 omplete with blade holder for all os lades. Regular price, $1.75 ote ooenies 1.25 F-l—For AutoStrop razor. Regular price, $1...... 78 cial offer has never been made before and may not be gain, so send today. You take no risk; my guarantee The Mercury Mfs. Co. li2 Mercury Bids. — Adrian, Mich. ADVERTISING SECTION 193 Let Iver Johnson Be Santa Claus An Iver Johnson Bicycle Just what brother or sister wants! Made to fit all sizes of men, women, boys and girls. Built with the famous Truss Bridge Frame, or Drop Bar if desired. Iver Johnson Shot Guns Champion Single Barrel Shot Guns in various gauges and styles including the Matted Top Rib and the 410. Also Double Barrel Hammerless Shot Guns. An Iver Johnson Velocipede Loads of safe fun for any little boy or girl. Made in three sizes, with brilliant baked- on enamel finish, either red or blue, with white head; full nickel fork; all nickel plating over copper. An Iver Johnson Revolver Always a sensible gift for home protection. The world-famous *‘Hammer the Ham- mer’ Safety Revolvers—made in different calibers. Write for Free Booklets Catalog *B” illustrates and describes the complete line of Iver Johnson Bicycles, as well as Iver Johnson Velocipedes Catalog “‘A’ illustrates and describes the complete line of Iver Johnson © Hammer the Hammer” Safety Revolvers, as well as Iver Johnson Champion Single Barrel Shot Guns and Hammerless Double Barrel Shot Guns. DEALERS: We se!l Bicycles and Veloci- pedes direct to retailers. A golden oppor- tunity is yours to handle this famous line. Write for DEALER PLAN IVER JOHNSON’S ARMS & CYCLE WORKS 4 River Street, Fitchburg, Mass. New York: 151 Chambers St. Chicago: 108 W. Lake St. San Francisco: 717 Market St. IVER JOHNSON BICYCLES REVOLVERS VELOCIPEDES SHOT GUNS Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION LU MINOL rendering it perfectly in — —_. — IT SHINES. Quite simple your wateh or clock will caioam you = ait the ti: LUMINOUS PAINT Make Your Watches, Visible by Night f:7°7, able exce . at an exorbitant price, we have at last « Clocks, Etc., latest discovery in the scientific “Thitherto. practically unobtain- —— in producing this remarkable 18 PAINT, which, apoted to the surface of any article, emits rays “ white light, A 3 hanger ,, THE MORE BRIL- 4 little applied to the dia! You can coat the push but- yone—you can "a it. me by night. tons or switch plates of your electric lights, a boxes, and innumerable other articles; ane our own Luminous Crucifixes, Luminous Rosaries, etc. Smal! bottle, price 25c. Larger and $1 postpaid Serpent's Eggs Box contains 12 eggs. When lit with a match, each one gradually hatches itself into a enake 1 feet long, which curls and twists about in a most life-like manner, CIGARETTE MAKER , CiGARETES, KER Roll your own and save money. Makes them better and quicker besides saving more than half Use your favorite nd of tobacco. Neat, useful and handy. Pocket sise, weighs 4 oz Made entirely of metal, nickel-plated. Price 25¢ postpaid. MIDGET BIBLE »reciated. Make good money riends, church sequaintances 15e¢ each 3 for 40c, 12 for 7.50. Magnifying Glass for be seen to be ap selling them to use with Midget Bible, 15¢. Withabunch yy of these bills, it is easy for each person of Hmited means to appear yrosperous »y flashing a roll of proper time and peeling off a genuine bil! or two from the outside of the roll, the effect erentee B. be found to be all that can be desired. Prices, Posteeté: 25 Bitte} 15¢,50 Bills 25c, 25 for 50c, or $3.50 thousand. Wonderful X-Ray Tube |. A wonderfullittie nstrument ro- ducing optical illusions both > surprising and startling. With it you can see what is apparently the bones of your fingers, the lead in a lead pencil, the in- terior opening in a pipe stem, and many other similar illusions. A mystery that no one has been able to satisfactorily explain. Price 10c, 3 for2Sc, 1 dozen 75c. Johnson Smith & Co. A VERY atriking and uncommon ring. Silver finish, skull and crossbone design, with two brilliant, flashing geme spark out of the eyes. Said by many to -—_, G Lack to the wearer, hence ite nam ood Luck Ring. Very unique ring that me will take a pride in wearing, ONLY 25 CENTS. DYING PIG The most laughable novelty yet produced. Made of rubber, and you have only to blow it up gy stand the pig on his feet, when he to squeal as he slowly collapses finally lies down and dies in the most natural manner. ou can blow him up ae often as desired. and each time he will go through the same performance to the great amusement and delight of your Saw & Price, 15 cents; 3 for 40 cents; one dosen $1.35, mailed. Popular Watch Charms ONLY 3 for 40c; $1.35 doz. Very pretty little curiosities and decidedly novel itted with Magnifying Lenses that enlarge Be pictures to & very surprising degree; in fact, it seems almost ineredible that a clear picture could be possible in such a small com- pass, and how sharp and distinct they show up — . = look through. Come in assorted Actresses, vie = of Panama Canal, Lord's F Prayer in type, @ Mystic Skeleton A jointed figure of a skeleton 14 9Qe pd. in. in height, will dance to music and perform va- rious gyrations and movemerts while the oper- ator may besome distance from it. ROPE SPLICING Useful Knots, Hitches, Symese, etc. A most practical hand! iving complete and si 3 directions fo: for maki moet useful knots, ¢ rigging, splices, ete er ¥ 100 illustrations. Ail about on qttachmente, lash- tackles, ete 37 * Hernldis trated Knote illus Of great value to mechanics, riggers, campers, boatmen. Price 20c ppd. MAGIC FLUTE Wonderfully Sweet Toned and Musical The Magic Flute, or Human- atone, is & unique and novel musical instrument that is layed with nose and mouth combined There is just a little knack in playing it which. when once ac- uired after a little prac Post we will enable you to Paid roduce very sweet 25 boo ven that somewhat c mbles a flute. There ie no fingering, and — you bave mastered it you can play all kinds of music with facility ond ease. When played as an accompaniment iano or any other musica! instrument, the othe ct is ae charming 4s it is surprising. Address orders for all goods on this and opposite pages to JOHNSON SMITH & CO. Dept. 278 A DeLuxe Edition of our new 1925 CATNAO maited cloth binding. Onty of its kind. book > pause of the newest novelties, puzzies, games. coorte ng goods, | in seeds and plants, etc., unp RACINE, WIS. tee Nateot tricks tn Only a otunane avettable. BLANK CART RIDGE PISTOL Protection agaist Burgiars, 7; amps Well made and effective; modelled on latest type of Revolver; appearance alone is enough to scare s cane When loaded it be as effective as a rel revolver without danger to life It takes standard 22 Cal. Blank Cartridges obtainable every where. Price » Superior quality, $1.00 o- id. Blank Cartridges by expre: 50c per folster (Cowboy ty = tor "Blank Cartridge Pistol, so DANCING B BEAUTIES 7:25", Kinemetograph and see the / ae move. France's latest } sensation, A greatsurprise. Is! ; worth twice what they cost. Are ' made of solid brass, highly nic- ‘ kled and very durable. Satisfac- + tory.or your money back. Cc .. - * Wrens ant”, son Smith & Co., Dept.278, Racine Wis. BOYS! BOYS! OY _— YOUR VOICE Into a trunk, under Bd the bed or any- where. Lots of fun Y fooling the teach- *,er, policeman or friends. THE VENTRILO a little instrument, fits in the mouth out of sight, used with above for Bird Calls, etc. Any- Wever Fails. A 32 page bo ever s. 32 page Ok on Ven- triloguism, the Ventrillo, ALL FOR 10CENTS il k 000. sil us Fie Hoc ants Heal Kenta Pin Pade Bure to aciekt you.” you. For, 10 Centssin mt rete ee JOHNSON SMITH &ECO., Dept.278, RACINE, WIS. 357 paieatert te # thing yet. Nine éy area delighte with it. 4 of pleasure as wellas very use isadouble Mi the wonders of nature. It is also an Opera Giass, « a Burning Lens, a Reading Glass, a Telescope. &@ Compass, a Pocket Mirror, and a ngasco ff examio- ing eye. ear, nose and throat. ft ‘s worth all the cost to locate even one painful cinder in the eye. Folds flat and fits the pock- et. Something great—you need one. Don't miss it mail, postpaid. 38c or B for Si. 00 Resurrection Plant eof the most won- plants known the strange mer or stirs AGEMTS WA “aantED JOUNSON SMITH & CO., Dept. 278, RACINE, W'S. k ———— a

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POPULAR MECHANICS ADVERTISING SECTION 195 .|| EXCELSIOR SOLAR TELESCOPE , AND MICROSCOPE COMBINED PRICE || PE 5125 id =~ to Any a - ames Acidress Guaranteed SCIENTIFICALLY PERFECT by the Makers Over 31. ft. long, nearly 6 ins. around With Adjustable Solar Eye Piece 4 pene hn grea aaa Ew tae ty Fe ba 4 ET | ee ng of the Sun and examining the very interesting and mysterious Sun pots, has never before been obtainable for less than several times the price - oll in fact, such an eyepiece alone usually costs more than the price charged for this complete Telescope. The lenses are well ground and adjusted, and the five sections are perfectly fitted. There is a metallic cap to protect the object glass from injury and to exclude dust. The section with the eye piece can be withdrawn and used separately as a powerful magnifier or microscope. The Telescope when fully extended is about 3 feet 6 inches in length, and when close ; it measures almost a foot. Tourists, residents at the seaside, farmers and others able to enjoy wide and extended views should have this excellent and wonderfully heap Telescope. For a limited time only we are offering this Tele- me comune ostpaid, at the very remarkably low price of.. n y JOHNSO SMITH & CO., Dept. 278, RACINE, WIS. MILES PER HouR CAA Veale. 2 SUN SPOTS THE EXPO WATCH CARERA The most wonderful and ingenious Camera made t is but little larger than a watch, which it closely resembles. You can carry the Expe about in your pocket and take pic- tures without any one being the wiser. Less Than 2 Cents a Picture The Expo toads in day- light with 10 or 20 Ex- _— Films, costing Se and 35¢ respective- ly, and thus the pic- AVS Wieistiptou sila oe Siemans — - ae ’ ki Speed : WYSTERY BOAT ai {5 bay pope ty ae like boat Entiret: = poe tented principle never before applied to toys small lump of Canned Heat such as Sterno, obtainable anywhere, in b sts only One Tenth of # Cent for One Cha . Runs wherever there + bath-tub, dishpan—anywhere at all. Any child can operate it. Made metal, attractively enameled in colors, hull dark green and deck bright red ble, footgeost os atte. Sete long. Price $1.00. CANNED JOHNSON 9 Dept. 2 ‘VANISHING INK Writing written with this remarkable ink per can INVISIBLE INK st confidential De aang an be written vanishes entirely in a few weeks (sooner ‘ ture taking part of a > . s Ink, for the if desired), leaving the paper QUITE whole day’s outing may ) MAKES NO BLANK. 1Se¢ plow - Price h. ye Hy very nominal . ‘ WARK annot be seen : know the secret. alua for many rea- wns. Keep your LUMINOUS INK Biles eas ean be READ — Lit more than one cent a a private ‘memo- Cate Te DARE Paid Easy to Manipulate G sbi ike fire “ from h he re Rapid c* reat fan un tor Brie a Quite. invisible st B..9 A cimolisty thes If to er , my Beged to aii e . = ; Ot nu re e oe ae rn Operated as Quick as a Flash a A nickel piated End —— LADY’S LEG KNIFE Pencil with Microscopic View and the world over. Thoroughly WATCH CA 7 a ‘and Sevelopin of films just the same ae Decidedly novel and ordinary cameras—in daily use by ice, newspaper reporters, ERA excellent pencil with detectives, and the general pub’ Ay mportant beats have been , “ secured with the Watch Camera by enterprising reporters Pro- fitted a tiny micro- duces clear, sharp negatives indoors or outdoors equa! to nz * \ . camera on the market, size or price notwithstanding to an almost in- ff, Under a Positive Guarantee. credible degree by the Expo Watch Camera FILMS, 10 Exposures 25¢, 20 Exposures 35c small but powerful lens. A Price Post Paid $3.60 Leather Pocket Carrying Case, 35c¢ reat _ curiosity eperted JOHNSON SMITH & CO., Dept. 278, Racine, Wis. Pt FLASHLIGHT MOVIES tresses, Panama Canal, Lord's . NEW © Combines ® Movie 3) Flashligh Prayer, etc. Price 1S¢. 3 for 40c., $1.35 doz., postpaid. lendid> Moving sinters Ma al using standard Fin ee at theatres. Shows large, clear pictures Always reac for use; simply press the flashlight switch and you are ready for the show. Not necessary t electricity in h Flashlight can be discor oa nd used separ if desired rhe waht 6 prrenged for use with Filme or Lantern ; FR each machine: 1 can Film on Slide(for making your own lantern slides out of old f 1 Transparen 1 verything about the Ku Kiux Klan told in a Pa fearless manner. peek me it started and was suppressed in 1871—The New Ku Klux Klan—How organized—How members are et.rolied—Oath of the Kian— Questions for Can- didates—Creed— Objects of the Order— Obedience —Fidelity—Pledge of Loyalty—Ku Kiux Klan aupply - antee, instructions, ete care- 5 Oo 1.00 and the Masons—The Jews—The Masons— Real fully packed and sent pre- Oath—The Negro Ku Klux Klan, etc., etc. Latest and most paid to any address for only ete boa on the Klan published. Price, 35e, postpaid Extra Film in 25, SO or 100 ft. lengths at per it SEX INDICATOR JOHNSON SMITH & CO., Dept. 278, Racine, Wis on- , - Some time ago we received trom All the Latest Surprising and Joke Novelties es abroad what we consider the most - aieds p nge unique — ees novelty Miniature Water Pist 10¢ Manos” Self-filling Fountain Pen 2 in we hav seen. It's the Cleopatra's Snake ll lifelike)J 150 Great Fire-eating Tric ( ‘on MAGIC. INDICATOR. We paid False Mustache 100 Magic Ball and Vase Trick 200 ~~ 50 cents for the one we received Pocket Detective (see behind you) 15¢ Naked Truth Joke (Magic Card) 150 a about s year ago, and we don’t be- Great Mind Reading Mystery 100 Chicken I: he - or Bade: 100 Da j lieve _we ever got a bigger value Thurston's Myster Trick Cards 100 Liar’s License 10c I » License ‘0 ee i interest. Hold the MAGIC INDICATOR over s man's hand—ir Fighting Roosters, pair 1060 Far 1ous Simplex Typewriter nal $ 50 re ves in a straight line, backward and forward Hold it over a Saui rt Ring 2c Trick Pencil 15 250-ehot Automat ap Pist« 15e vom, i and it describes a complete and continuous circle. The same action cap Rubber Tacks (a « ood joke) 10e | 8 rprise Matches, per box P de ~ ver a letter written by a man or woman, et It is fascinating: baffling erized Penr . 200 Deck Marked ( ards I W ver been able to figure out how it’s done—but we've never seen it fail hoo Sneering Powder 10c | Ever Pan Writing Pad ‘ 4 a 1 and entertaining feate may be performed with the Sex Indicator For Magic Plate Lifte . 2 he Wire I tazles, big ass - 10 for 25e res lar resulte can be obtained with ar imale eats, dogs. rabbits, over birds Imitation Gold Teetis 3 for 10¢ | Shir er, i5e. Soot Card chick anaries, ete. Also used to predet nine the how { ch ickens and birds. ete Barking Dog (imitates dog bark) 20¢ | Forte Tel ng Car rds Rind deck 10 . sold as a patented egg tester ir ke one t y gathering and see Exploding Cigarettes. Per Box 25e 3-Reel 'M ving P re ¥ e $3 00 nterest it excites. Price 25c¢ a —- 3 ‘tor 65c. postpaid. 26-piece Set Silveroid Tableware $1.98 Air Pl novel an ‘4 de . 0 w Dente ssemancren SOHNSON SMITH & CO. °: acine, Wie.

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196 POPULAR MECHANICS ADVERTISING SECTION

FOR HOMES-SMALL BUILDINGS - FLATS

Improved 1925 Model utomatic No.4 Oo. B., K. C., Mo.

Specifications MOTOR— 1-20 H. P.—-Direct connected to fan. CAPACITY—Steam radiation—700 tt. Water radiation —1100 sq.ft. Furnace—up to sq. ft. FUE ww ~ gasoil—distillate or Kerosene — 36 “Gravity or higher. FEED—Gravity flow to burner. PILOT—Oil pilot fire automatically increased to high fire by thermostat. City gas not required. WEIGHT— Boxed for shipment—1

Ibs. Tanks not included. Can be installed ‘by any pipe fitter—complete instructions furnished—made in three sizes— Nos. 2,4 and 5. Dealers in many cities. Write for catalog. Some territory still open for exclusive dealers. Oil burner firms will find the Royal a quick selling, dependable addition to their line. We refer to Dun or Bradstreet or any Kansas City bank. Willis W. Howe Co., Manufacturers 3030 McGee Trafficway, Kansas City, Mo.

YOU ie 18 Pan a

Lucky 11 Toilet Set— Retail Value $3.35! MY! HOW THEY SELL! You get the attention with the free Shears. Walter Harris sold 800 boxes in six weeks. Profit over $100 a week. You can do this too. on like hot cakes year round. A Act Now! baby could sell Lucky 11. Don’t wait a a minute. Save time. Send $1.75 for complete outfit in- cluding display case. At least write for circulars explain- ing our unique plans, including 30 other packages. ACT NOW! E. M. DAVIS CO., Dept. 6624, CHICAGO, ILL.

Gained six pounds in a week. You know how I used to smoke—a pack- age of cigarettes and a cigar ov two a day—it sure had some hold on me. But I'm cured— took a scientific home tobacco treatment fixed me up in two weeks, “Wasn't hard on me at all—noticed improvement the first day—lI fecl like a new man. It didn’t interfere with my work—didn't leave any —) after- effects—the money I saved in the last two weeks has paid for the treatment alone. ““Why don’t you take it? It has cured men like you and me for over forty years — it is a doctor's individual prescription that sure fixes you up. Just send the cou ors Pon for full iefaemetion NOW. No obli- gation. All correspondence is strictly iption confidential. * The Keeley Institute, Dwight, Ill. Please send me, without any obligation on my part your free booklet which will tell me how to rid myself of the tobacco habit.

Name... cecess FOE HEHE SESE EEE SESH EEEESESESSSOOOSSE

TOWN. .cccocces covccccceccccece GIS. «000 concbcnceons State..ee-eseee P..M.'16 RRS RE! AE STROSS SS ARETE TEN Ae SA TTL

HILMOR QUALITY SHIR PA DPI ‘4m THE unusual beauty, fine quality and popular ao Prices of PHILMOR cut-to- 242 it shirts make them the fast- est selling mo -maker for comes } ndersell Quick de’

liveries. 300 hand- gome samples. Steady. rear-around business. Me p iavestioent or ex- perience Write ea mg a learn how to get "s samp free, eee HILMOR c to. 5 2 Union Square, New Dope. © City Our BUREAU OF INFORMATION will answer al! ques- tions regarding articles in this magazine. Address Popular Ghedienates Magazine, Chicago.

“Lighting Fixtures” READY TO HANG (Direct from Manufacturer) Completely wired, including glassw Send for Catalogue No. 26. Just Off the Pre Special propesition to DEALERS ERIE FIXTURE SUPPLY —

STA. A ERIE,

may gg ** FREE ‘ie with 3 ft. Telescope opie ar aiieste mnfies away just ine ey were close; see and as never before.

brass bound erful f lenses. Uretu and —<

j iene, 4 . re oe eniies away Dr, my as arrive at Phos) 2 miles} & = 3 m, *Readnumbers| ~ =

thn ene oe

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ques- ddress POPULAR MECHANICS ADVERTISING SECTION 197 $250.00 Weekly~Sullivan’s Success ~Your Opportunity Less than a year ago Robert Sullivan, Indiana, was a newspaper man. He was looking for an opportunity to make more money—just as you are. Sullivan read Oo! o ‘ a “Tater-Flakes” ad. Investigated, saw the possibilities, and started into this $25.00 worth ' wonderful business. He is averaging $250.00 clear every week—in a smal! town! later-Flakes”’ Figure your oe” ae “Tater - Flakes” Booming Everywhere Down south Hoffman & McLeish are running around $100.00 daily. Conover, Ind., averages $50.00 daily except Saturdays, which average $100.00. Frank Berry, Ind., says: ‘Using 3 barrels of potatoes daily Have splendid wholesale and retail business. Am supplying 5c and 10c stores."” Mrs. Suttleworth, Colo., averages $20.00 to $25.00 daily. Charles Schaffer, Wis., operating 5 stores, averaging more than $500.00 week! It’s a Wonderful Business “ Tater - Flakes’’ are a new and different potato chip Can't be compared to ordinary chip. The ,Tater- Flakes’ machine slices, cooks, crisps, browns and de- ° livers Flakes entirely automatically. Anyone can easily operate. Bright girl or boy canrun machine. Outfit in window attracts attention Passing public stops and looks. Golden, crisp “ Tater - Flakes"’ with appetizing odor whets appetite and people buy. Retail business thrives from very start. Profits simply great Sold in glass- ine packets also in bulk A Business You BM own ways. Snow- white sides, Can Handle , ee — j as ot Write quick—get complete details beauty of this wonderful new business. No er experience needed. Moderate cap- /) ital starts you. We give you every . assistance—furnish machine, service men, field men, merchandising ideas, ete All you have to supply is location You plunge into retail and wholesale business at once You become member of great s* Tater- Flakes"’ organization. Have opportunity to attend annual gathering of Trater-Flake"’ men—an institution national in scope QUICK SUCCESS POSSIBLE rhe marvelous “ Tater-Flakes"’ machine— the surpassing goodness f “ Tater-Flakes”’ the whole-hearted and continued co-opera- tion of the “Tater-Flakes” organization makes quick success possible. It’s your opportunity—the chance you have been watching for—grasp it quickly Sit down now and write for full particulars Your territory may be taken if you delay Address TATER-FLAKES CORPORATION, Inc. Dept. 39 20 E. Jackson Bivd., CHICAGO, ILL. t ™ = see ~ U.S.ARMY KRAG CARBINES All carbines have the new model 1898 stocks. The barrels, Ss 1 5 actions and parts are either new or have been refinished by the Government, and equal to new ....... . KRAG RIFLES, $12.50 KRAG SPORTING RIFLES, $14.00 CALIBRE 45 SHOT GUNS, $4.50 CALIBRE 45 CARBINES, $3.50 Utility Bags for Bait, Lunches, etc., 40c. Parcel Post Paid DRAB Wool Breeches init wheal Maicirthe HomeGurds $1.50 En SEND FOR OUR COMPLETE CATALOG ARMS CLOTHING and things W. STOKES KIRK ; out of the ordinary 1627-PM North 10th St., PHILADELPHIA, PA.

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198 POPULAR MECHANICS ADVERTISING SECTION Bungalows — Semi-Bungalows — Cottages — Resi- dences! If you want a real home combining an im- pressive exterior and comfortable, well planned, homey room arrangement, you must see the latest De Luxe Addition of our latest book of Homes and Building Materials. More than a hundred modern, attractive, livable houses, featuring all that is best in construction—each one an architectural triumph carefully planned and designed by expert architects. All Harris Homes Beautiful have been built many times with big economy and life-long satisfaction to their owners. They Present a perfect combination of approved construction, finest materials, “‘planned the Harris way”’ to save from $500.00 to $1,500.00 of your money. Ask for your copy of this free 400- page Building Material Book, No. CB-7, today. Thousands of Bargains Like These MATERIAL BOOK OF HOMES GARAGES LUMBER MILLWORK PLUMBING HEATING ROOFING PAINT HARDWARE and Every Needed Item to Build, Improve and Furnish Your ~ Home o Clear White 2 Nght 24”°x) The bathroom outfit shown in- Pine Storm glazed, Combination - ah cludes bathtub five feet long,|Sash with Screen and } dows, 1-3/8” | white porcelain enameled on the frames.1-1/8 rm Door. | thick, outside | inside, dow pattern white tank | thick. Best cusse B8to i Size 2/8%x7/| measure 2/4- 1 Eri0. Outside f auis iy 178x3 70. closet outfit and white porcelain | &10: Ou oy $6.77 Dept. CB-7 enameled lavatory complete with | meassre |! $2.50 _ | tll fittings above floor S65 OQ | $1.53 35th and Iron Streets Economy Special pan - elled doors, size 2/6x6/6, a - i thick, “$3.20 HARRIS BROTHERS CO. CHICAGO, ILL. the time with Let Me Put You in Business I have put hundreds of men in the profitable business of cord wood and log sawing. Indications point to a more prosperous season this year. Coal will be high and hard tc get. Many farmers and house- holders in your locality will gladly give you the job of sawing their fuel wood when they learn that you can do the work in one-tenth WITTE 2—=—-i SAW RIG You can cut 60 to 70 cords a day easily. At from 50c to $1.25 a cord, you can readily figure ae for a day's work. Read what J. 8. John- son of Centralia, Mo id You Won’t Have to Pay a Cent out of your present savings. You can make enough money the first 10 days to pay for — outfit. From then on, a clear profit of $100 a week should be easy. Write Me Toda and I will gladly send you details of my plan to put youina y big paying business of your own. ED. MH. WITTE, President WITTE ENGINE WORKS a 4742 WITTE BUILDING 4742 EMPIRE BUILDIN KANSAS C G, SNS BURGH PA. The is ¢ Alt Ea Ea

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y .) ra? ver ve te

thy. | Sety = = ca i ! - The model shown is the new 192 Alto Buescher Sa rophone. Easy to Play Easy to Pay Free! Send the cou- pon or a postal a free copy J r very in- ng Saxo- pn Book. ali about arious styles with pic- fur of the S pro- Jessionals. y POPULAR MECHANICS ADVERTISING SECTION Popularity Plus! apm es

ours-with this most winning * “of all musical Instruments It’s easy to be popular - to be in demand socially - to be welcome everywhere - with an irresistible Buescher Saxophone. Don’t be a wall flower. Don’t beadawdler. Stepout of the crowd andinto the ‘*‘picture.’’ Be able to do something to earn your welcome. Learnto play a

SAXOPHONE Easy? - you'll be astonished to see what you can do in a few days. Most people are able to play a few pieces of popular music in two or three weeks. It’s great fun - learning - and you are mastering an accomplishment that will mean big money to you if you decide CL A a NE 6 Sg to use it commercially. , Buescher Band Instrument Co | 353 Buescher Block, Elkhart, Ind sentlemen Easy payments to suit your convenience. 1 < 1 I am interested in Instrum checke Six days’ free trial. Send the coupon or a stal for your copy of the free Saxophone k described at left. Mention any other | Saxophore Cornet Trombone instrument in which you may be interested. Mention any other instru No obligation whatever. Do this today BUESCHER BAND INSTRUMENT CO. Everything in Band and Orchestra Instruments 353 Buescher Block Elkhart, Ind. I | I State | RSE OO i ALAS

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POPULAR MECHANICS ADVERTISING SECTION Everyone interested in Radio should have this 68-page book of approved parts and sets— it’s free! Catalogue NE copy of Ward’s New Complete Radio Catalogue is yours Free— you need merely to write for your copy. It shows you everything new in Radio, everything that has been tested and ap- proved by the Radio laboratories. Simple instructions are furnished with every Ward receiving set, enabling you to put up and operate it without outside help. And the prices on everything in this book are surprisingly low! A Price and Quality Guide Study this Catalogue every time you need any- thing in Radio, whether parts or a complete set. See what is the lowest price for standard qual- ity goods. Everything shown in this Catalogue has been selected by an expert. Everything is standard. Remember at Ward’s we never sacrifice quality to make a low price. Yet our prices are always Write for Your Free Copy low because we sell direct to you by mail—and without the usual “ Radio Profits.” Bring the Joy of Radio Into Your Home You can get the most enjoyment out of Radio only by using standard, high grade equipment. You know what you are getting when you buy at Ward’s. You are sure of high quality as well as a big saving when you order from this book, for our Radio equipment is sold under the same liber- al guarantee we have made for 52 years on every article sold by Ward’s—‘“‘Satisfaction Guaran- teed or Your Money Back.”’ Write for your free copy of the new Radio Cat- alogue. Write to our house nearest you and address Dept. 6-R Montgomeéiy Ward &Co The Oldest Mail Order House is Today the Most Progressive Chicago KansasCity St. Paul Portland, Ore. Oakland, Calif. Ft. Worth

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Boys! Ask Dad a to give you the lifetime gift this Christmas POPULAR MECHANICS ADVERTISING SECTION p 7 J Gi: fee % | —a wonderful pithy - Electric Train jou boys wiil experience y one of the greatest joys nd of your life when you see, on (christmas morning, a won- rful Ives Electric Revers- ng Locomotive in front of bright, realistic station [here it stands, waiting for first run over your newly- lio established branch of the Ives it. Railroad System—a system at with trackage sufficient to ex- as tend from New York to San for Francisco, including branch er- nes all over the country. Think of a locomotive that an exact model of the giant ctric locomotives used on t. the New York Central and ther great American rail- Holland Avenue IVES;* i] & roads! A locomotive that will reverse itself, electrically, at any position on the track, without being touched by hand! A locomotive that switches its own cars, shunts them into sidings, or speeds —with electric headlight ablaze and each car illumi- nated—around the track and couples automatically to the front of the train. Ives has the most complete railroad system ever devised There is an unlimited variety of bridges, passenger and freight cars, switches, tun- nels, stations, automatic bell signals for crossings, auto- matic block semaphores, etc THE IVES MANUFACTURING CORPORATION Bridgeport, Conn. 2s TRAINS rT ' ' ' ' ’ ' ' ' ' ! ' ' Ives Toys make happy boys Ask Dad to give you one of these won- derful Ives Electric Reversing Loc motives this Christma There s every conceivable acce ry with which to equip a system. €emember, there's an Ives outfit to suit every purse The include mechanical trains for the t of 3 years and upward, to the m« wonderful, complete electric syste: Prices range from $1.50 to $50. At the best toy, department, electrical and hardware illustrated 32- which show Send for brilliant age book in full c ohne complete Ives lins stores Mail this coupon for the Ives book—TODAY'! THE IVES MANUFACTURING CORP 196 Holland Ave Bridgeport, Conn I enclose 10 cents (U. S. Stamps or coin) for your 32-page book in full colors show- ing the complete line of Ives electric loco motives, freight and passenger car ig nals, etc Name Address City é

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202 POPULAR MECHANICS ADVERTISING SECTION He UNLIKE ALL OTHERS! ONE TO SIX PUMP-STROKES COMPRESSES AIR TO ANY SHOOTING-FORCE DESIRED eee Th. BENJAMIN Ordinary Shooting This illustration shows an inch block of wood is the gun you have bee (double size) penetrated to different depths by a lookir . FE . ts we : _ " Benjamin Air Rifle using one to six charges of air. ig Tor. or target prac- . ; tice and for hunting rabbits, r Rifle Can Duplicate squirrels, gophers, rats and frogs it has no equal. It is the most powerful, accurat: and reliable compressed air rifle made. It has a far greater shooting range than any other. Imagine bringing down rabbits with an ai rifle! You can do it with a Benjamin. The BENJAMIN is the ONLY PUMP GUN MADE using compressed ait SIMILAR TO AIR DRILLS AND HAMMERS. It does not lose shooting force after long use. The BENJAMIN is the only air rifle with th« shooting force under th« operator’s control. It can bi loaded to shoot weak or powerful as desired, from on¢ ‘ to six strokes of the pump giving all the power wanted It is absolutely safe; acci- dental discharge is impossible Furthermore, after being charged with air, it is ready for instant use at any time after the shot is placed in the barrel. The BENJAMIN is mechanically perfect. It is the only air rifle not requir ing frequent repairs, custom- ary in all spring guns. $ oOo Post- paid Canvas Case $1.00 Write for descriptive folie: giving full dutails of this wor derful air rifle. BENJAMIN AIR RIFLE & MFG. CO 651 N. Broadwa: ST. LOUIS, MO., U. S. A Price MTTTTTTTITITTTTTTTTTTTTTTTTT CCC Pacific Coast Representativ« THAYER & BOWER Los Angeles, Cal. & San Francisco, ‘ PTTL ECC L LLL MTT CCC CCC CLL bbb bbe bbb

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POPULAR MECHANICS ADVERTISING SECTION 60 MILES or casoun: OF GASOLINE TESTS SHOW FORD CAN RUN 60 MILES ON A GALLON The amazing fact that a Ford can run 60 miles on 1 gallon of gasoline was recently brought to light through tests conducted by America’s foremost engineers, where it was shown that a gallon of gasoline contains sufficient heat units which if properly atomized and mixed with air would give this additional mileage. Great strides have already been made in this direction by the recent invention of a simple attachment which can be installed in a few minutes without any alterations to the motor. It is common for Ford Owners to make from 40 to 44 miles per galion after this marvelous device is attached. MOST WONDERFUL INVENTION TODAY BRINGS JOY TO FORD OWNERS Starts Ford Instantly Eliminates Oil Pumping Starting a Ford Car in cold or zero in Front Cylinder weather is something every Ford Owner dreads—everybody realizes What a wonderful relief to Mr. Ford Owner that difficult starting is an abuse on when he realizes that he can run his car the starter and battery. Thousands without the motor pumping oil in the front of Ford Cars are “laid up" during cylinder. Sounds like an awful lot to ex the Winter just for these reasons pect of any device, but that is what the This great difficulty has been over- SUPER does and this is only one of its come. “The SUPER positively many advantages because it puts real efficiency into any Ford Car starts a Ford Car instantly in the Complete Combustion coldest weather Marvelous Device The SUPER is so designed that it takes The SUPER is no trick affair—re- advantage of the present Ford Carburetor quires no mechanical adjustments and properly atomizes the light as well as and contains all the scientific prin- the heavy elements of the fuel, convertin ciples of carburetors costing $20 to every atom of gasoline and kerosen¢ t $35 and in its natural action uses up ower preventing liquid fuel from passing every particle of unused gasoline and nto the cylinders, thus avoiding carbon formation and oil dilution. breaks it up into a perfect vapor. Easy to Sell The hitherto impossible is now real- ized by the SUPER. Sells Like Hot Cakes This is a recent letter from one of our distribu- Everybody Satisfied tors: “Enclosed find draft for 200 more SU- Saves 3 to 7 Dollars Per Month PERS, rush as I need them badly. I sold and The best investment I ever made. The IPE 7 4 7 SUPER is saving me from three to seven banked $104.00 in one day Hope to sell 1000 SUPERS next month.” A

g

dollars each month, besides putting new life into mygmotor. A. H. WORRA, lowa. Makes 44 Miles Per Galion I have tried the SUPER and the results of the experiment are satisfactory. One quart of gasoline run my Ford 11 miles over improved

W. LEONARD, Penn Making Big Profits Every Noon I have been working the SUPER at noon only Yesterday noon I made more money with the

SUPER than I did at my 11 hours’ hard work roads which is just about again as far as I could ~ + , . t : , 2 run with the plain Ford Carburetor The in-the factory all day. J. L. LEHNER, Wi G. E. YODER, Penn

Had No Previous Selling Experience

Finde That Our Claims Are Correct Heart This letter shows what ambition does: I find that your claims for increased mileage of the I sold six SUPERS in less than 2 are correct and that a big saving is made by hours tonight I think it’s a pretty your SUPER, in fact, the best device I have Motor good start#—for it's the first thing I met with in that line ever sold.” M. J. VAN LEEUWEN, Mass.

E. MANGOLD, Ind. $60.00 TO $150.00 PER WEEK EAS You just can’t help making Big Money selling the SUPER because a trial sells itself and soor everyone in the neighborhood get talking about this marvelous device. Men like Leonard Shaw, Manner, Kinsley, Peters, Sands, Beck and Hall are not exceptional salesmen b just the type of men that saw an opportunity and were quick to grasp it when within reach. No previous selling experience is necessary, just a little ambition on your part to make money is all we ask and we will extend the same opportunity to you. Spare time will pay you well. If you can devote your entire time so much the better, cause the SUPER isa whirl-wind seller and takes hold in a locality like wildfire

? Men Wanted Everywhere To Introduce ” £ We want distributors in all parts of the country to take orders and deliver the ¥ > SUPER and to look after the repeat business that is bound to follow and to s s such distributors we are willing to assign territory. You do not have to own o 4" ~ vinces the most doubtful person and tells a wonderful story. a % © ~~ SF SSH A REAL FUTURE HERES Vo *? vy < WEEKS SUPER CARBURETOR CO. FGF «* fo oy WY SD « P 1304-725 Fond Du Lac Ave., Milwaukee, Wis. . :

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Make yourself a presen POPULAR MECHANICS ADVERTISING SECTION Bench Milling Machine No. 644 | Price $120. 4 t of this milling-machine UST the thing that every amateur mechanic and owner of a small workshop longs for. Has a three-step cone pulley, 1%, 2%, and 3% inches in diameter, for l-inch driving belt. Live spindle has cone bearing to take up wear. The table measures 112 x 3% inches ard can be fed three ways by hand wheels. Feedscrews havegradu- ations for fine adjustment. Knee is elevated by a screw operated by a hand wheel at back of frame. Bench space of pan or bed, 8 x 12 inches. This machine is furnished com- plete with a compression chuck with ¥%-inch bushing. Countershaft, arbor, vise or centers may be pur- chased separately. Other tools for amateur mechanics The Goodell-Pratt Catalog No. 15 is a genuine paradise for tool-lovers. In it are shown all the famous 1500 Good Tools—many of special interest to the man who is building up his own workshop and who is on the lookout for more complete equip- ment. Catalog No. 15 is free. Write for a copy. GOODELL-PRATT COMPANY, GREENFIELD, MASS., U.S. A. Makers of Mr. Punch GOODELL-PRATT 1500 GOOD TOOLS

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POPULAR MECHANICS ADVERTISING SECTION 205 e Greatest Advance yet made in and DIO Receiver and Loud Speaker in Combina- tion Cabinet of Solid mahogany Mat all tube onln$l oc Non-Oscillati pows

Complete me pe pad all accessories RITE TODAY for full particulars of this most exceptional offer. Marshall Sets embody the very latest im- provements known to radio. The wonderful new principal involved is proving the sensation of the 1924-25 radio season. Zero Coupling—the problem which radio engineers have been working on for years—has at last been solved. As a result, the Marshall has no need of neutralizing condensers or other make-shift methods of avoiding internal oscillations which invariably reduce efficiency. The Marshall Tuned Radio Frequency Receiver brings to radio a new — of macs quaity,. at selectivity will delight the experienced radio operator. Yet it is so easy to tune that the novice will handle it like an expert. Small Monthly Payments—2 Weeks FreeTrial That is the remarkable offer we are prepared to make you. Two weeks to prove that the outfit you select is every thing we have said for it. If it doesn’t make good our claims, back it comes, and your deposit will be cheerfully refunded. But if it fulfills all your expectations, you may pay for it in easy monthly installments. You don’t ris a cent when ordering from us. You must be satisfied, or we don’t do business. Is it any wonder that radio buyers, the country over, are rushing to take advantage of such an offer? If YOU are interested, figure on getting 1 wy order in early, while prompt shipment can be made. Everyone predicts a serious shortage of radio supplies this season. Send for full particulars today. Beautiful Solid Mahogany Combination Send Coupon for Special Offer!

beautiful Comb Cabinet, pictured If you have any idea of buying a radio set this year, don’t let Ky 2. end oo > the Receiver and i Ft this chance slip by. Our terms and liberal guarantees have set in a single cabinet. Or, if you ‘er, we also have the @ new pace = the radio business. The low prices we will make oun » ptt cabinet of the came design. ne a os 72 on a 3, 4, or 6 tube Marshal! set fl eparprice ou. A harmonise with the furnishings of the finest homes. In epite “ot the tter, postcard, or just the coupon willdo. But send ft today. Siem citccders rch giver oth are remeticr'yeu tan srder's We aleo have a moat favorable afer for radio dealers. Write, | Marshall outit on two weeks’ free tria! and pay for it on very easy terms. lete Outfits If Desired Morchall Refle Prodects, tee. nue 13-58 Chi | a ~ — hall, yo have the choice of a set complete SEeSEnES SSG. om “nd ~ rem et accessories, or the set alone. You have choice of dry Please send me special offer price, terms and full description of = or ~~. battery outfits. Unless you already own the Marshall Radio Outfits. Though I may change my mind on receiving <4 you can ‘bay them ag at less-than-market your proposition, my preference now is for a: Drices, wi set, on easy terms. Your outfit will come all ready to set <p end te within a few minutes—saving time = #~~-~~ 3 Tube .....4 Tube -.... S Tube (Please check) and trouble—and saving money, too. MARSHALL RADIO PRODUCTS, INC. Name Marshall Bivd. and 19th St., Dept. 13-59 Chicago, Ill.

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206 POPULAR MECHANICS ADVERTISING SECTION

SOUTH BEND LATHES 31,000 IN USE

— 9"x3’ Bench, Standard Change Gear. . . .$201.00 = 9"x3’ Bench, Quick Change Gear....... 231.00 11"x4’ Standard Change Gear.......... $248.00 11"x4’ Quick Change Gear............. 288.00

* <I 18"x10’ Standard Change Gear........ $656.00 18"x10’ Quick Change Gear ............ 721.00

13"x6’ Standard Change Gear j 13"x6’ Quick Change Gear............ 366.00

16"x8’ Standard Change Gear.......... $438.00 16"x8’ Standard Change Gear Motor Drive $594.00 16"x8’ Quick Change Gear........... 498.00 16"x8’ Quick Change Gear Motor Drive 654.00 THE EASY PAYMENT PLAN You can purchase any size or type of South Bend Lathe by making one payment with your order The balance to be paid monthly. Write today for Catalog No. 82, which describes the Easy Payment Plan on all South Bend Lath South Bend Lathe Works Sovtt tend, ino. v. 5.

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To everyone on the list—give Eveready flashlights! mee a iale ME I POPULAR MECHANICS ADVERTISING SECTION FLASHLIGHTS & BATTERIES ~they last longer o ii | f; Z 4 2 Eveready Unit Cells fit and in prove all makes brighter light and longer battery life —-. or Unit cet ron rrasmien”® AcaAiIn the Christmas season! Suggestions and counter - suggestions. “er “Give this” ‘ “Give that.” Here’s the happy solution: “Give flashlights. Everybody wants an Eveready.” Because it is the per- fect portable light for every purpose and purse; because it is a gift that is good-looking as well as practical and safe; because it appeals alike to young and old because it does so much and costs so little. There’s the Eveready Aluminum Flashlight that fits the pocket. Fine for the Boy Scout. The Eveready Focusing Flashlights, with 200, 300 or 500 foot range. Great for motorists and motor-boatists. Broad-beam lights for Mother and Dad to use around the house. Hand some nickel or ribbon black cases. Just take your gift list to the nearest Eveready dealer. You'll find the right light at the right price and save hours of shopping The improved Eveready line omprises twenty-two fine flashlights in four general types. New de signs. New features. But old prices—65c to $4.50, nplete with I ywhere in the v. s. A. Buy them from any el: trical, hardware or marine supply dealer, drug, sport ing goods or general store, Earage or auto accessory attery — Manufactured and guaranteed by NATIONAL CARBON COMPANY, Iwnc. New York San Francisco Canadian National Carbon Co Limited, Toronto, Ontario

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208 How You Can Make Soft Woods Beautiful as Hardwood F you have a hobby for refinishing woodwork or for making furniture, radio cabinets, etc.,— you will find our Book on Wood Finishing invalu- able. It tells how to stain wood artistically—how to remove old paint and var- nish—how to secure a beautiful enamel finish. POPULAR MECHANICS ADVERTISING SECTION My 1 , nis UR Book gives com- 4|| = : plete instructions A for finishing all wood hard or soft, old or new. i) It is the work of experts ‘ — beautifully illustrated in color. Gives covering capacities—includes color charts,etc. Tells just what materials to use and how to apply them. Use Coupon below Use Coupon below JOHNSON’S Woon DYE (Penetrating) With Johnson’s Wood Dye you can make soft woods as beautiful as expen- sive hardwood. It will enable you to color hardwoods most artistically. Very easy to apply—dries in four hours and will not rub off or smudge. Penetrates deeply, bringing out the beauty of the grain. Like most first class products Johnson’s Wood Dye serves one purpose only—it dyes the wood—a finish should be applied over it—either Johnson’s Wax or Varnish. Johnson’s Wood Dye is made in seventeen beautiful shades, all of which may be lightened, darkened or intermixed. Full instructions on every label. Among the most popular shades of Johnson’s Wood Dye are: No. 129—Dark Mahogany No. 125—Mission Oak No. 124—Golden Oak No. 127—Brown Mahogany No. 123—Dark Oak No. 131—Walnut No. 126—Light Oak No. 110—Bog-Green Oak Order from your dealer by name and number. Insist on Johnson’s Wood Dye-—-there is no substitute pr ~"“FREE—25c BOOK ON WOOD FINISHING=~~ Ask for a FREE copy of the Johnson Book at stores displaying the sign i shown at right. These stores all carry a complete stock of Johnson’s Artistic —_ | Wood Finishes and will be glad to show you finished wood panels—and —" © | ‘ answer questions on how to properly finish wood. If no store in your locality | SERVICE I »ROPER 1 can supply the Johnson Book —fill out and mail this coupon for a copy which anal i i , ae STMENT | we will send Free and Postpaid. i FOR FLOORS i I wo ! . . wooDW | YOUR DEALER'S NAME eum JOHNSON ' | FURNITURE it i 8 Your Name..... ; : > F ARTISTIC i j | ND I iseticcrienscirsiensssistincs woot. | $C JOHNSON ESO" ‘ FINISH { een ip City & State a 1 Mail to S.C. JOHNSON & SON, Dept. P. A. 12, RACINE, WIS. i “The Wood Finishing Authorities” (Canadian Factory—Brantford) = POPULAR MECHANICS PRESS

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ed ng ak Mes ce ee oe os oe oe oe ee UG COMPLETE coun 4 ‘ ELECTRICITY FOR FREE ,EXAMINATIO VMI UMN HE iw “sttt17 _ fe" HAWKINS ELECTRICAL GUIDES 3 3500 PAGES —4700 PICTURES — $1 A VOLUME—S1 A MONTH—10 VOLUMES over sooo] Know the facts in Electricity. They mean more money and better posi- out Electricity I tion for you. Hawkins Guides tell you all you need to know al i very oK'o important electrical subject covered s you cal inderstand it Easy te tudy and ipply A complete, practical working course, in 10 volumes Books are pocket size; flexible covers. Order a set today to look over agnetism Induction Experiments Dy- Principles of Alternating Currents and Alter namos—klectric Machinery Motors Arma- nators Alternating Current Motors rrans ires Armature Windings— Installing of D former Converters — Rectifiers Alternating blee Lit ume! sting mrs ‘ ( Break ’ Ji i Mana of ynar and M AZ Distributior tems— Wiring—Wi i #7 ~ grams fan Slashers “torage Batter L : No USEFREE sHIpPeD FREE 3°: =’ COUPON ang > x NOW Vip YL IA ADSS THEO. AUDEL & CO., 72 Fifth Ave., New York City Please submit me for free exan ition, HAWKINS ELECTRICAL GUIDI Price $1 a number Ship at once prepaid, the 10 numbers If satisfactory, I agree to send you $1 within seven days and to further mail 5 $1 - | im¢e V4 , 6 7 5 oe? © © eo oo ¢ > 9

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CONN INSTRUMENTS CAre made differently Mechanically Inclined HIEF of the exclusive processes veloped by Conn in the making of band instruments, is the fam hydraulic expansion of tubing. Locked a perfect steel die, the tubing is filled with water, subjected to tons of pressure, whic! expands the tubing to perfect proporti ind gives a smooth-as-glass interior perfect carriage for sound wave > | a% '. o*s ¥ This 1s the big reason for the more Dedauti- ful tone, perfect pitch, and easiest play qudiities, as Well as the uniform excebence Conn instruments We shall be glad t tell you in detail about the many exclusis features which make Conn instrument upreme in every detail—choice of the world’s yreat arttsts. Tree Trial; Easy Payments. Ai wind instrument sent prepaid for six da} trial. Write for details of this liberal offer } First three written lessons free on request with every new instrument purchased C. G. CONN, LTD. 1231 Conn Bldg. Elkhart, Ind. INSTRUMENTS WORLDS LARGEST MANUFACTURERS

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POPULAR MECHANICS

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POPULAR MECTIIANTIOCS

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Selecting the Proper Vacuum By F. L. BRITTIN

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POPULAR MECHANICS Need a Panel for the Set? experiments will be made shortly to deter- Use an Old Record mine its special advantage In other respects o need { home ment is similar A j , . , rut teu ydromete1 Screwdriver-Wrench Aids Set Assembly Italian Amateur Broadcasts with Unusual Aerial Instrument bad ocations this tool 1s immeasurably traight wrenche use OT ¢ a : ce to fit lal counterpoise over the antenna and — used on radio fitting

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