Popular Mechanics 1927-12: Vol 48 Iss 6

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SEE PAGE 102] ~ ——_ ae

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aLVER’ STEEL HACKSAW, BLADES =e = & = & “They Cut TWICE as Fast” OUR Hardware Dealer can show you the wonderful new ATKINS “Silver Steel” Hack Saw Blades for hand use. They revolutionize metal cutting—cut twice as fast, and last at least six times as long, as any other hack saw blade you ever used. Think what a saving of time, money and effort this means. What it means to do a metal-cutting job in ha/f the usual time—to have a hack saw blade that will outlast six ordinary blades! ‘Silver Steel’? blades keep their teeth and will not snap. You should be using these new blades NOW. Ask your hardware dealer for them. If he cannot supply you, write and tell us what kind of metal you are cutting, enclosing 25c, and we will send you a sample ‘SILVER STEEL” blade. E. C. ATKINS & CO., Est. 1857, 426 So. Ills. St., Indianapolis, Ind. Leading Manufacturers of Highest Grade Saws for Every Use; Saw Tools, Saw Specialties, Plastering Trowels, Machine Knives, Grinding Wheels and Files.

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POPULAR MECHANICS ADVERTISING SECTION Silent Here is the Eveready Layerbile “B” Battery No. 486, Eveready’s longest- lasting provider of Battery Power. TURN your radio dial, and presto! you turn your home into a theater, a concert hall, a lecture room, a cabaret, a church, or whatever you will. Turn the dial and your at- tentive ear does the rest. That is all there is to this magic of radio. Or almost all. If a radio set is to work at its very best, attracting no attention to itself, creating for you the illusion that can be so convincing, you must pay a little attention to the kind of power you give it. There is but one direction, a simple one—use Battery Power. Only such power is steady, uniform, silent. It is called by scientists pure Direct Current. Any other kind of current in your radio set may put a hum into the purest note of a flute, a scratch into the song of the greatest singer, a rattle into the voice of any orator. Don’t tamper with tone. Beware of interfering with illusion. Power that reveals EVEREADY dio Batteries -they last longer The air is full Radio is better with Battery Power its presence by its noise is like a magician’s assistant who gives the trick away. Use batteries—use the Ever- eady Layerbilt “B” Battery No. 486, the remarkable battery whose exclusive, patented construction makes it last longest. It offers you the gift of convenience, a gift that you will appreciate almost as must as you will cherish the perfection of reception that only Battery Power makes possible. NATIONAL CARBON Co., Ine. New York San Francisco I Unit of Union Carbide and Carbon Corporation of things you Tuesday night is Eveready Hour Night—9 P. M., East- ern Standard Time WEAF—New York WOC-Davenport WJAR-—Providence KSD—St. Louis WEEI—Boston vw cco-! Minn. WFI-Philadelphia \Se. Paul WGR-Buffalo WDAF—Kansas City WCAE-Pittsburgh WRC-W ashington WSAI—Cincinnati WGY—Schenectady WTAM—Cleveland WHAS—Louisville WWJ—Detroit WSB—Atlanta WON--Chicago WSM—Nash ville WMC—Memphis Pacific Coast Stations— > f. men Pacific Standard Time KPO—KGO—San Francisco KFOA—KOMO-Seattle KFI—Los Angeles KG W-—Portland shouldn’t miss

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Airplanes and Dirigibles Have Rendered the Astronomer Independent of Clouds and Rain, Enabling Him to Take His Cameras Aloft to Cover Such Events as an Eclipse—See Page 962

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Fopular Mechanics Magazine REGISTERED IN U S. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT DECEMBER, 1927 bead scientists from the University of lifornia are trving to learn the cause in man, and the reason he huge size to which treme obesity whales grow. believe, if they find the one, they will in the trail of the other. iS thought that whales which are the largest creatures which on earth, attain their weight, and produce their thick layers ever great length tat, because of the absence, or deterio- on, of the pituitary and thyroid glands. is known that failure of these glands to unction properly in human beings pro- luces either giants or dwarfs, excessively t persons or exceedingly thin ones. Whales from the twenty-foot ngth, of a small variety found in New -ealand waters, to the ninety to 100-foot ulphur bluebacks, of the orth They weigh an average t one ton for every foot of length. Scien- range bottoms, or Pacific. sts say that, while the whale is admira- ly adapted to the element in which it lives, there is no apparent reason for it 0 attain such size; that, in fact, the size a handicap in its feeding, migrations nd general success in life. They believe By H. H. DUNN the whale during its development in past generations lost its pituitary and thyroid } elands, either in whole or in part, or the became SO altered that development of the mammals to their present size resulted. It this condition is found to exist, examination of hundreds of w 1 " +4 | — an . — it to be general, simula e } = 1 1 ' 1 P ve carried On with e ephants large animals. The condition al add another chapter to the scientific tory of the influence of these two gland on human life, since the whale is as much of a mammal as ereatl man, whom it resemb!es in structure, save for size. If, on the other hand, the whale is found to possess the pituitary and thyroid glands, 1 be of it is believed they will such large a new and valuable source size as to form now used in the treatment of obesity and of excessive leanness in man. The used in the experiments were hunted in the most modern manner, mechanical devices produced during the of supply for the extracts, whales past ten years having brought an end to the old-time year-long voyages in saili1 ships, and reduced the adventure a1

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S82 The them more ble of whaling to an exact business. small iron steamers—none of than 100 feet long, and many not so large as the whales they hunt—put out of En- senada or Guaymas each morning, seldom than A lookout goes into the crow’s-nest on the mainmast of the little proceeding more twenty to forty miles from shore. steamer, and watches for the “spout” of vapor which betrays the whale newly risen to the surface. At his cry, the steamer, which has a speed of twenty knots, as com- pared with the whale’s maximum of fif- teen, sets out in pursuit. Chere is no lowering of longboats, hours of pulling at the oars, days wit as in the old of whaling, and there is no danger to men or vessel, unless some huge and crusty old sulphur bottom decides to charge the steamer. The gunner takes the tarpaulin off the three-inch harpoon gun, set well forward in the puts the charge of black powder in the breech, fits bow, the 150-pound harpoon in the muzzle, and stands by his lanyard. The head of the harpoon carries a kill- ing charge of high explosive, with a time fuse, set to explode four seconds after the harpoon leaves the gun. Leading from the harpoon is twenty to thirty feet of heavy steel chain, rove into 3,000 fathoms (18,000 feet) of three-inch Manila cable, running to a steam winch below decks, and feeding through a slot and pulley in the very tip of the bow. This winch has an automatic arrangement, whereby it re- leases and picks up this great cable as POPULAR MECHANICS easily and in the same manner automatic fishing reel takes care slack in a thin silk or linen line. The wheel by which the steam: steered is located in such a position the helmsman, usually the captain, | unobstructed view of the gunner an sea ahead. As he approaches w shooting distance of the whale, he the ship “dead on” the quarry, just gun-pointer might lay his cannon o: target. The gunner then, so long a captain holds the ship on her “point,” tends to the depression or elevation his piece, considering the roll of the and the roll of the whale. When the t rolls coincide, he pulls the lanyard. If Nis aim is good, the harpoon st: about. ten feet back of the great hea whales have no visible necks—and pet trates to such a distance that the cl of explosive wrecks the heart before monster can “sound.” If all goes well whale is dead in a few minutes, the wit takes in the line and the thirty to 100 t of flesh and bone and blubber are pull alongside. A man, armed with a lo: hollow-stemmed steel lance, connect with an air compressor, leaps to the ba of the floating whale, drives the lance de: into its vitals and the body is pumped fu of air. A flag bearing the name of t!] ship making the capture is stuck on steel rod in the whale’s body, which -_" : bh 4 . When the Lookout in His Barrel on the Masthead Cries, ““There She Blows,”’ the Gunner in the Bow of the Whale Ship Swings His Harpoon Around, Ready to Fire

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POPULAR MECHANICS ist loose while the r goes after an- returning later to » its earlier kills. owever, the har- es not strike true, explosive fails to the whale almost ately sounds—that rs its huge flukes thirty feet in the d dives. Contrary aling fiction, the seldom goes down than 500 to 600 feet. ile is able to remain water not more five minutes, being elled to return, at end of that period, to op for air. it the whale may The Yeitai Bridge in Tokyo, Illustrating How Japan Is Keeping Abreast of ¥ the Times in Steel-Construction Methods e up half a mile the whaler, whose three miles or BUILDING PROGRESS IN JAPAN e of cable still holds fast. Then pur- SHOWN BY STEEL BRIDGE taken up again, the cable, drawn making a drag of the ship against rength of the whale. Now and then, That Japan is keeping abreast of times in construction methods is sl} ae . he Yeitai -idge in To the large whales, rising close to the the Yeitai bridge in | he vessel teamer, will charge t and such a collisi is fraught danger both men and_ boat. support the lower par one place, these are fifteen etimes, the w will rise a mile or vay, ie weight of that length ble, if the harpoon is well “sunk,” 1 1 bands replace the usual c wears down the big mammal’s ~ ength until it can be overtaken easily. PULLING BARRELS UP STAIRS whales so taken are towed like so IS MADE EASY ny barges or ‘ . oe to a m ner ‘,o Simplify the p, or, as in Mon 3 Task of Hauling : Barrels up re and Eureka, + Stairs; the Ap- taking them down lif., to shoreside paratus in Work- is made safer and ae . \ ing Position , , | King stations, easier with a tackle here they are cut » \ a apparatus intro p and every bit of , . duced in France. It e carcass utilized. 4 = consists chiefly of a he oil, however, cable sling which is the principal i. passed around the product, being —_ 2 : s barrel and a geared rth today around . drum by which the ‘1.40 a gallon, as — ropes are wound up ompared with ' — or let out. By turn eighty cents at the ing a crank, the load height of the whaling industry in the late’ is easily drawn up the stairs and releasing eventies and early eighties. the cables permits the barrel to descend.

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POPULAR Where Body Blows Mean Little; Barrel Boxers in Action BOXERS BATTLE IN BARRELS FOR NEW RING THRILLS Wearing barrels suspended from their shoulders, boxers at the Oregon agricul- tural college furnished spectators amuse- ment by their grotesque tactics. The “protectors” such difficulties as hitting below the belt and tested the ability to attack and protect the head. eliminated AIR MOSS REALLY AN ANIMAL ALTHOUGH SOLD AS PLANT Among the interesting specimens in na- ture are those that lie close line between plants and animals, times confusing to the border- some- scien- MECHANICS “CAFETERIA” HOTEL HAS NO CLERKS OR BELL Boy: You on a write your blackboard. room, where find the key on the of the and morning, you slipa in a slotted entrance, as your door, box at you These are the chiet malities at a Texas run the self-service idea, \ out clerks or bell | Each which is strict] room is abundant linen and other neces articles, and the proprietor asserts that sup} with stock has had few patrons who have attem The hotel has pri especially popular among auto tourist to evade payment. OLD ROOSEVELT FAMILY HOUSE RETURNS TO FAMILY Still in good repair, a wooden house Brooklyn, Conn., built by Col. Dar Tyler, great-great-grandfather of M Theodore Roosevelt, has been purch recently so that the Roosevelt family retain possession of it. The dwelling built in 1765. A tomb and statue ne it were erected in memory of Gen. Is: Putnam, revolutionary-war hero. tists and almost al- ways a riddle to the lay- man. One of these is the which is dredged up from the sea, airmoss, dyed a brilliant green and sold in conveniently sized bunches. The material is not vegetable but animal, being built up by the se- cretions of a vast number of minute creatures liv- har- Each animal has long tentacles food and colony. ing in a close monious to sweep into its The mouth. colonies grow at moderate depths. Tyler House in Brooklyn, Conn., Built in 1765, and Recently Acquired by the Roosevelt Family

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Air Liner Designed by M. Louis Bleriot, First Man to Fly across the English Channel Four Engines and a Detachable Fuselage Built like a Boat missing and presumably drowned seven lives snuffed out in pre T° ENTY people, including two wom- ong-distance flights. That is , aviation’s biggest, ‘most spectacular in all the tv tol vears since le Wright took the first plane into rat Kitty Hawk, N. C., on December 103. And the whole world is asking her transoceanic flving is worth the 7 e in lives and material he answer is important, for throughout vorld well-meaning people are initiat- lovements to put a stop to such fly- the rest Whether such a ban would work is And th ibtful, but three of the eight men who that once ceeded in crossing the Atlantic this was fool have declared their opposition to it. with single Lindbergh says it would put a stop to and _ navigating entific progress; Clarence Chamberlin planes incapable not o1 lares it would retard the advance of the sea, but of rem ition, and Commander Byrd believes ately rough weat! e step unnecessary because the pressure In the final analvysi | e lessons of public opinion alone will deter further 01 the edless risks by eliminating possible speed up incial backers. of planes for

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POPULAR MECHANICS with a competent operator in charge. Improvement of navigation and flyi: struments, and com; aerial navigation every long flight. Better weather re; covering conditions the sea routes. Charles A. Levin New York, who ho; bareheaded into ( berlin’s plane and fl Europe as the first t1 atlantic aerial passe1 is planning a regula: lantic air service. nouncing the detail London, he said planned to build + planes, each with pacity of fifty passer besides its crew. | plane would have engines, of which four would be in u any one time, lea three in reserve. ships would be mor plane flying boats, c ble of landing at sea necessary. Major Coli, Left, and Captain Nungesser in Their “White Bird,’’ Decorated with Nungesser’s Grim Wartime Insignia the enthusiasm aroused by the successful flights. The automobile has been built on the f its own faults when driven to and the same is true of other piece of machinery that has reached a high state of evolution. So it is assume that the lessons of disaster may, in the end, out- weigh the rewards of success, and in that sense even the heavy toll of life be made to pay. lessons of its destruction, every reasonable to Aviation leaders are generally agreed on a number of the cluding: Abolishing the use of land planes for long flights over water. The necessity for multimotored planes, capable of carrying on with at least half lessons learned, in- their engines out of commission. radio-sending and for every Complete equipment receiving long-distance flyer, Their great size, fifty passenger seats berths, would mean economical operati With a ship like the one he flew to Euro; the fare would have had to be at least $251 per passenger, whereas his proposed seve motored airplane would bring the ove: head down, by dividing it among so mat people, to tlie point where aerial line: could compete on ocean steamers. Levine isn’t moth air liners. favorable terms w alone in planning mai Prof. Junkers, Rumpl and other German designers are alread building them, and Louis Bleriot, the fir successful sea flyer in history, for crossed the English channel, has prepar: designs for two. 30th are monoplanes, ea: driven by four engines, placed in tande: fashion, two on either side of the fuselag: driving a pulling and pushing propeller One of the designs calls for 2.800 horse power. The passengers would be housed it

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POPULAR MECHANICS

art of the Long Honor Roll of the Brave; at the Left Is Lieut. Col. Minchin, Famous British Air- ys Pilot, Who Was Lost with Princess Lowenstein-Wertheim When Her Plane, the “St. Raphael,”’ sappeared in the Atlantic; at the Right Is Capt. William P. Erwin, Who Went to Sea on a Rescue ssion in His “Dallas Spirit’ and Fell in a Tailspin Somewhere West of San Francisco, as His Radio Reported Before the Ship Hit the Sea } —E \ / = = —_ = — <4 ———— ——— — SS — Ike Eichwaldt, Navigator of the “‘Dallas Spirit,” at Left, Sent the Final Radio S.O.S. That Told the Norld Their Rescue Mission Had Failed; in the Center Are J. D. Hill, Left, and Phillip Payne, Right Respectively One of the Pilots and the Passenger in the “Old Glory’; Hill Sent the Radio S.O.S Just Before They Fell; at the Right Is Paul Redfern, of Georgia, Who Circled a Freighter Off South America and Then Disappeared into the Blue ‘ a Lloyd Bertaud, the Pilot Who Took “Old Glory” on Her Last Flight, at Left; He Learned to Fly Two Planes 4 She, Too, (0 More Than Twenty Years Ago by Building a Glider from Popular Mechanics Plans; the Smiling Pair *” One of the Sent Her Are Gordon Scott and Jack Frost, Navigator and Pilot of the “Golden Eagle Lost in the Dole Flight, and for Whom the “Dallas Spirit’? Was Searching When $.0.S. and Plunged into the Pacific Ocean

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POPULAR MECHANICS X\ —sbe enormous harbors to shelter seap have vast landing decks for land shi; provide hangars, machine shops, m ics, and hotels for the passengers. cost would run into the millions. It is possible that a half dozen lightships, anchored at similar ints and equipped with powerful radio port weather conditions hour by might be more useful, at less cost. There is a growing field for aerial igators capable of guiding a plane t part of the world. They must know than the captain of a surface ship, fo: latter’s field is limited to the surfa the wings as well as 1 central body. The ship, a smaller model, would have four engines developing a total of 900 horsepower—motors the same size as the ones h, Chamberlin and Byrd used—and the Lindberg fuselage would be a de- tachable lifeboat, capable of being released from the wing and driven over the waves under its own pow er. Equally important with a bigger and better ships, John Pedlar, Miss Mildred Doran and Lieut. V. R. Knope, of the “M 2 Doran” Plane, and Capt Tulley and Lieut. Medcalf, of the “Sir John Carlin; powered with several en- gines and fitted with boat hulls, is the need the sea and the storm winds immediate for better weather service. The shortest above it. The air pilot, on the other han air routes do not follow the usual steamer must be not only a competent navigat routes at sea, for the latter are diverted by sun and stars, but must be an expe! by the necessity of keeping away from land meteorologist, versed in the air layers { and other obstructions. Yet the only sea- miles above the earth, and capable of fin: weather reports available are those wire- ing the most favorable layer in which lessed by ships. They are supplemented, fly his course. in part, by predictions based on the known Better navigators and better weatii speed of storms checked while they moved reports are essential before round-tr across land, but, at best, predictions for flights to and from Europe become pra: weather over the sea remain inadequate. tical. The westbound trip has never be: Several inventors have proposed huge made by a heavier-than-air machine, an landing stages, to be anchored at intervals only twice by gas-filled ships. The fir of 500 miles across the ocean. They would was the British “R-34,” which made th:

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POPULAR MECHANICS 889 FOLDING WINDSHIELD NAVIGATORS HATCHWAY FOR SIGHTS FLOTATION BAGS IWELATED Wire CARBON -OIOXIDE FROM COMPRESSED AIR BOTTLE CASE OF FORCED LANDING ON WATEHK DETACHABLE SHASSIS EARTH INDUCTOR COMPASS GENERATOR Type of Ship Used on Most of the Ocean Flights This Year, Big Monoplanes, Single-Engined, Equipped with Some Provision for Floating on the Water; This Is the “‘Golden Eagle” trip to the United States just after ar, and the second was the German- airship “Los Angeles,’ which was from Germany by a Zeppelin crew lelivered to the U. S. navy. o French, two Gern.an, one English one Irish plane have started the west- trip. Nungesser and Coli disap- ed at sea, and all the rest turned back when they found the weather out the Atlantic was worse than the ther reports had led them to expect. he westward flight is not going to be mplished, nor is a regular air line go- to be established, without taking more neces. If the attempts are made in te, without proper preparation and pment, in order to win a prize donated ome well-meaning person anxious to e his name connected with aviation the tremendous amount of publicity h a connection brings, it may end in ure and further loss of life. 0 aviators, however, that loss is con- ered part of the game, which is why they ent any suggestion of forbidding haz- lous flights. They point out that when rvile Wright made his first flight at tty Hawk he took chances far beyond se faced by any ocean flyer. He didn't »w how to fiv, nor did he know that ship would fly, and the ocean racers new the answer to both. His homemade gine was so weak it could barely keep e ship in the air at thirty-five to forty iles an hour, and every flyer knows that tety lies in speed, for the slow, lumber- ng plane is at the mercy of every air gust nd every air pocket. A regulation against hazardous flying would have kept Wright, Santos Dumont, Bleriot, Glenn Curtiss, and all the rest of the pioneers out of the air. If aviation profits by the lessons of dis aster, as it is preparing to profit, then it may be said that the price, however great, was not too much. BED ROCKED TO IMITATE TRAIN AS INSOMNIA CURE Discovering that he could sleep much better in moving trains than in a station ary bed, Sir Alfred Yarrow, a British ma- rine engineer, devised a rocking apparatus for his bed to reproduce the motions of a sleeper berth. It is operated by electricity and controlled by a button. ee ee ee ee ee To imitate the Rocking of a Train; Electric Shaking Apparatus Connected to Bed, to Induce Slumber

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890 Testing Gas Masks in the Ex- Chamber; the Men Are Breathing Fumes Compartment Keeps periment Inner Attendant Watch and Checks the Time GAS-MASK TESTERS RISK LIVES TO PREVENT ACCIDENTS lo make sure that gas masks issued for service are in working order, they are tested under conditions somewhat perilous to the demonstrators at a London labora- Men wearing the masks breathe fumes from a poison chamber, while an observer carefully watches them for signs of trouble. tory. The air which they exhale is also analyzed to determine the effects of wearing the protectors. BUILDINGS’ COLOR TO SUIT SUN INCREASES CITY’S BEAUTY Greater attention to color effects in sky- scrapers and other buildings is doing much to beautify cities in the opinion of Henry Boehm, New York architect, who points out the importance of studying the quality of the sunlight and the atmosphere POPULAR MECHANICS in each locality in o to apply the right co The reason for this is what appears to be br and from While Careful attractive unde \rizona sun, for insta may be dull and unsu to use in a city like B ton, where the air is quently moist. Colo: merely reflected certain pigments abs: ing part of the rays allowing othe: “bounce back” to the ¢ Since the sunlight fected bv the quality the atmosphere throu, which it passes, the res is certain to be manifest: to some degree on ¢€ terior colors Thick, some of*the especia heavy air filte color oul light; hues are intensifi in rare air and the ang at which the sun strikes an object dur different parts of the d often has an effect on t! shade and colors. t] + ese things must iken into account by t “color architec The introduction ol ~t wide range of building materials. such terra cotta in various colors, makes po sible a far greater emphasis to the cok scheme than builders were able to achie when ordinary brick, stone and stucco we the principal materials available. BLACK-BACKED PLAYING CARDS SHOW FEWER STAINS Playing cards wit! black backs hav: been introduced t ease the eyes and conceal stain Hearts are in red clubs green, dia monds white and spades yellow again the ground, the color scheme making it easit + to distinguish and sort the cards. , black back

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POPULAR MECHANICS MEN CAN STAND THE HEAT BETTER THAN THIN ONES ts by the bureau of mines show that n can stand high temperatures bet- n thin ones. They lost more weight ere less exhausted after the experi- The trials revealed that pulse rate rather than the mere in- in bodily temperature, is the im- yere over. factor that brings discomfort un- eh heat and humidity. In a state and in still air, the experiments re- that the human body cannot en- indefinitely a temperature higher ninety degrees Fahrenheit, with 100 ent relative humidity. Subjects be- extremely uncomfortable when the - rate reached 135 beats a minute, and irable symptoms were manifested at The highest rate recorded was 184. PEED OF POCKET-SIZE AUTO EIGHTEEN MILES AN HOUR ne of the tructed smallest motor cars ever introduced at a recent in France and attracted considera- Was ttention because of the excellence of orkmanship and its efficiency. It exact duplicate of the larger cars, oped a speed of eighteen miles an and was just roomy enough for a 1 ill small child to operate it. No Bigger Than a Toy, but It Runs like Larger Autos and Carries a Child Studying a Thunderstorm in the Laboratory; Flashes of Lightning during Discharge Measurements FIRE OF ARTIFICIAL LIGHTNING AIDS STORM STUDY Reports like those of gun fire and sheets of artificial lightning resembling a minia- ture conflagration are produced in a labo- ratory of the General Electric company, in Berlin, where special studies are being conducted on electrical discharges during thunderstorms. A transformer of partic ular type is one of the important units em- ployed in the investigation. ORIGIN OF BUTTER IS TRACED TO SWAY OF CAMEL Had it not been for the camel in Ara- bia, the world might never have discovered butter. The National Dairy council, after considerable research, has traced the ori in of butter to the Arabians’ habit of carrying sour milk in skin bags across the desert. The swaying motion of their camels caused the contents of the bags to turn to butter, which was first skin lotion. Later, they discovered the trick of making it by tying the bags to fast horses and racing the steeds up and down for several hours. They also laid the sacks of milk on the ground and beat them. With the invention of the first churn, these methods were discarded. used as a

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892 POPULAR MECHANICS FAIR OF THE IRON HORSE CELEBRATES HUNDRED When the Iron Horse Was Just a Colt, the “DeWitt Clinton,’’ Below, Hauled This Train over the Rails of the New York Central; Now the Historic Engine Has Run Again in the Baltimore and Ohio’s Centenary Fair, Celebrating a Hundred Years of Railroading in America — The Canadian Na- tional Lines Sent the Mammoth Locomo- tive, Above, to Balti- more for the Fair; the Giant Is Nearly Nine- ty-Four Feet Long and Develops 3,200 Horse- power; It Is Used in a 511-Mile Run from Montreal to Sarnia Henry Ford’s Relic Collection Yielded the “Satilla,” Above, a Quaint Survivor of the Spreading - Smokestack Days of the Civil War

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POPULAR MECHANICS y ARS OF RAILROADING IN THE UNITED STATES \ PETER CO thee h eter Cooper’s Famous ycomotive, ‘‘Tom mb,’ Was One of the Engines to Operate America’s Oldest way, Succeeding the e-Horsepower Hay rner Which Pulled the ginal Passenger Coach, at the Right; the t Horsepower Line Is Interesting Because the Rails Were Attached to Stone Bedplates, as Cross- ties Had Not Yet Been Invented; Now, after a fundred Years, Railroads Are Experimenting with Artificial Stone Ties The “Thomas Jefferson” of 1835, a ““Grasshopper’”’ Type Locomotive, So Named Because of Its Walking Beam Arrangement Which Resembled the Long and Spindly Legs of the Insect

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POPULAR MECHANICS WASTE OF ENERGY IN LIGHT SUGGESTS IMPROVEMENT Only a small pe: age of the electric that the filament in a bulb, goes to the pr ergy flows thr tion of visible light. rest passes off as he rays that cannot be by the eye. In some | as much as_ ninety per cent of the current unused for actual leaving the unit only per cent efficient so fa: illumination is concern: Improvements are be made, but electric e1 neers point out that ventors still have Locomotive as a Traveting Motion-Picture Studio; Photographers and Cam- eras on Running Board for Realistic Views CAMERAMEN RIDE ON ENGINE TO FILM RAIL MOVIE realistic railroad scenes for a picture, attached their instruments to the running board of To film motion iphers photog locomotive so that they could get “shots engine and th ’ : r of their own track ahead. Special ly ing equipment was and, although the cat p! OV ided leras were securely fastened, the swaving motion was re- corded sufthciently to add, in large meas- ure, to the realism of the effect. AIR AND WATER TOBACCO PIPE GIVES COOL SMOKE mendous field in the that Edison opened in producing an elect: licht bulb that will without an expense. five more brill increase in current or ot that light only two per cent more efficient One expert estimates the present common house type be devised, it would $100,000,000 a vear. save the count DISCOVERIES CHANGE THE MAP OF NORTH AMERICA A map is a romantic index of which is being changed by advent recent dis« eries. Reports of the Putnam Baffin land expedition, off the coast of Labrad show a new mountains, and e island range ot dence that the was once a p of the mainian A more enjoyable and freedom from injuri- ous substances are two of the smoke greater advan- tages claimed for a pipe on the market. It has an tobacco now inner sec- 1 tion of disks which is removable for i1 From Africa cot news of the findit of snow fields wit! in fifty miles of t! equator, at an al tude of more tl 15,000 feet in Ruwenzori moun Natives have feared to approac! tains. this range,in the be mersion in water to cleanse the smoke nner Section of Pipe Removed, to Show the Disks That Hold Water and Help Cleanse the Smoke lief that the snovw would kill them.

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ONE MAN SUPPORTS AIRPLANE lLHAT CAN CARRY SEVEN successfully designers of airplanes secured light weight without sacri- the strength of the craft is shown e accompanying illustration of one upporting the full weight of a large ; all-metal fuselage while two others it. The material used in this ship duralumin, which is being developed ncreasing use in aircraft because of its weight and strength. The fuselage irty feet long and five feet high, inside, a capacity of seven passengers. MERRY-GO-ROUND WASH RACK QUICKLY CLEANS AUTOS \utomobiles, instead of idy animal figures, ride ilerry-go-round in Los geles, but the unit is It for service instead pleasure. It is a wash- rack to save time in ining automobiles. rs are placed on a mov- platform and go past e workers, who perform various operations, rteen in all, while the ner stands in the cen- r to inspect the cleaning nd make suggestions if The platform ten feet wide and moves e desires. POPULAR MECHANICS Where the Library Goes to the Readers; 895 Weight of the Fuselage Is Resting on the Man in the Center, the Others Are Merely Balancing the Load; the Plane Body Is Constructed of Light Duralumin about a circumference of 287 feet. Pow erful lights help the cleaners inspect all parts of the car. .A machine is cleaned without and within in fifteen minutes. PUBLIC LIBRARY ON WHEELS SERVES RURAL READERS Persons living in the country near Cin- cinnati, Ohio, may enjoy the advantages of a circulating library, for branches of the main department is housed truck, distribut- one of the in a specially constructed motor which tours the rural ing books and collecting those that have been read. Counters on each side of the truck permit inspection of the An attendant keeps a record of the books that are taken out and returned. sections, volumes. the Motor-Truck Reading Room on Location, near Cincinnati

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896 POPULAR MECHANICS TESTING GIANT OF THE RAILS OVER MOUNTAINS Testing Apparatus, Installed in Booth on Front of Engine, Enabled Mechanics to Obtain a Complete and A rate Record of the Locomotive’s Performance on Trial Run 60,000," one of the latest prod- The boiler maintains a working pre ~ |} , he Baldwin works, made a char of 350 pounds, about 125 pounds vn movements during a test r than the usual engine making mount over the Sierra Nevada mountains r runs. No. “60,000” is nearly eighty cently. Recording appar: , installed at feet long, its driving wheels are sixty-tl locomotive, regi inches in diameter, and it weighs 457 ‘ry quiver of the mon- pounds. The engine is of compound t over steep grades and TIN TRAFFIC OFFICER IN AUTO aie ae as Ha HELPS PREVENT ACCIDENTS equipped with an oo : \ttached to tl interesting arrange- | - . . , rear window ment to prevent automobile around curves Besides the engineer and firemen, eleven mechanics were required yy i e locomotive is ot sparks setting fire to 4 vacuum cups,a mit the wooden snow- : ; lature tin “traf sheds. By means of policeman” gives a lever, operated 2 a 4 signal when the c from the cab, the oie a ae |e is about to slo smoke is kept from as .¥ Py down. This he dos passing out of the a “ ‘ by raising the arm stack in the usual pe to right angles. T 1 manner andis | & motion of the « forced back over causes the actio1 the engine and dis ——— and, when spee charged behind so has been again at that the sparks can- ‘ 5 a - : oe eee tained, the arms fa not strike the roof, Policeman Figure in Rear of Cat, and Drawing t© to the sides.

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POPULAR MECHANICS ST GENERATES ELECTRICITY and dirt air during the dust parts of the west, often gen- ic current. Measurements of a radio antenna wire and electrodes 411) OOO volts. sand flying les ot storms elect? i indicated potentials The tests were made lexas technological college, and the a result, were inclined to that ere suffered from radio antenne tors, as reater credence to reports such storms as well as from fence ind automobiles. The dryness of prevents the dissipation of the elec- accumulated. Similar experiments ] that dust smoke com- become charged, a volcanic erup- Alaska, in 1912, being attended with continuous thunder and the natives were terrified. dust, further her and so aid iown and lightning By study behavior of scientists believe clues as to the and present in all the time practi- may gain aviation radio unication, as dust is ter or less degree everywhere. SPECTACLE BOW ON TOP GIVES WEARER CLEARER VIEW he bows are near the top of the lenses center in an improved spectacle frame in- troduced by an Ohio oculist. This permit the wearer to turn is said to either side without en- countering the bows and the frame is rigidly and comfortably adjusted. his eves to TYPEWRITERS TO MATCH DRESS LATEST FASHION FAD brilliantly lacquered lors have appeared, to match various hemes of The in- increasing popu- irity of the instruments for personal cor- | women. ypewriters in interior decoration. ovation indicates the respondence among 897 “WrestEng” with the Arm and Back Stretcher; This Unit Can Be Adjusted to Give Different Degrees of Resistance BOUT WITH SILENT WRESTLER DEVELOPS ARMS AND BACK To take the place of a human antagonist, a western athlete has devised a mechan- ical wrestler to aid him.in his training. It consists principally of two handles or arms, adjusted to a standard, pushed or pulled against regulated to which are that intensities. ee : : —_* he exercise is said to be especially and resistance can be various bene- neck and back. ficial to arms, shoulders, COAT OF ARMS HONORS ANIMALS IN FIRST BALLOON FLIGHT 5 ff & A, According to tradition, a duck, asheepanda rooster were the first a balloon passengers in ascen- France, than 140 Honor sion in more years ago. has been paid to Y these pioneer air travelers on the coat of arms recently adopted by an army Figures of the animals are prominently displayed on the shield. ballo« yn corps.

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racking }) own By J. EARLE MILLER | eels years ago, three brothers out in ’ killed four trainmen and escaped, leaving behind a piece of burlap foot with pitch to throw bloodhounds off the Under the microscope, a criminol- ogist discovered three tiny grains of salt in the burlap, and with that slender thread named the More than three years later, one was arrested in the Oregon dynamited a mail car, coated covering scent. three slayers. , ) 27 sf , “az : Philippines, where he had joined the a1 under an assumed name. Three years eight months after the crime, the ot two were caught near Steubenville, O where one had married and the two living quietly on a farm. The three c fessed and were sentenced for life. Like the Canadian mounted, the po inspectors who form the man hunters t guard Uucle mails, Sam's never quit The Brutal Murder of Several Trainmen in an Attempted Mail Robbery Has Just Been Avenged by the Cap- ture and Conviction of Three Brothers, Caught by a Scientific Sleuth 898

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case until it is closed bv ar- rest and jus- tice, or, in some ca . by the death of the culprit. The identification of the three d’Autremont brothers s the perpetrators of the at- upted mail robbery at Siskiyou, Oreg., Oct. 11. 1923, is a story that outdoes Sherlock Holmes ever dreamed later is a story of unrelenting ir arrest years perseverance and e. Every resource of the government icked the postal inspectors in their long uit. Two million pamphlets, with the ctures and the three ivers, were printed and spread broadcast. ery post office under the American fl decorated with posters carrying the ictures and offers of $15,900 in rewards. C. W. B. de scriptions of da? Long, postal inspector, who he Marine Mail Guards with Rifle Pistol Tucked into His Tunic . lane from ville, Ohio, to June. of the capture, hovw arrested there in ever.r, few days after the attempted hold Prof. Edward Oscar Heinricl University of California, found salt erains of and built up tl evidence that fixed the crime d’Autremonts. flicht, burlap foot covering In their one of the the designed to shake off pursuit Prof found hounds. Heinricl vrains of salt adhering to the burl put them were rock salt used in salting cattle. A of the dynamiting vineer, fireman and a brakeman blood under his microscope. revea ed to be erains of a which scene, in down-in cold killed in the dvnami the blast at the same ti shot cierk Ready and

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900 the mail, so that the robbers got nothing —disclosed only one place near by where done. Near it was a cabin, of Douglas firs. The home- made pitch on the burlap had been ex- tracted, the microscope showed, from the ame species of tree. In the cabin, Prof. Heinrich found a towel on which a razor had been wiped, and, under the microscope, removed from the towel hairs from the beards of three men, along with pieces of skin scraped salting was in a grove from their faces while shaving. After examining them carefully, he announced the three men who had used the towel were of French-American descent, blond in complexion, and between eighteen and twenty-five years of age. Further search of the cabin revealed more burlap satu- rated with the pitch, both material and coating corresponding to that found near the railroad. The Ruins of the Mail Car Dynamited by the Three d’Autremont Brothers, Showing How an Excess Charge POPULAR MECHANICS he the robl returned to railroad and, on hands and knees, qi tered the ground for 100 yards aro At length, buried under leaves and wood in a clump of thorny brush, he fi a pair of overalls. had found professor Convinced hangout, the In the pockets other grains of the same type of rock and one pocket still sagged in the of a heavy revolver, while another yiel three hairs, : ‘ evidently scratched from head of the one-time wearer. The under the microscope, proved to come from the head of one of who had used the had shaved himself. the tl cabin towel afte Circling the scene farther, the revo was found which had bagged down overall pocket. The gun had evident fallen into a badger hole while the d guising overalls were being remo, Identification marks on the gun had bee: filed and burned off with acid, but ins the mechanism, where the owner had a of Explosive Defeated Them by Wrecking the Car and Killing the Messenger é

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tmaster-General New and Commanding Ger eral of Marines Inspe the | Guard at the Pust Of- 1 Washington; at the Prof. E. O. Heinrich His Laboratory with Mi- ype That Convicted the 1 Autr il num bret ugh that the gun traced to the er, and from his cords to a man ing the name of \ ham E] ott Phe rchaser’ descrip- n Wa obtained, nd it tallied with the eight, length and measurements t the overalls. That detailed description ered $760,634. e veal ~ asa ~ tted one of the three d’Autremonts. water mark for mail bandits, their lo Che French-American descent and the totaling $2,509,157, but of this $1,467,444 lond complexion fitted all three of them. was recovered. hey had disappeared from their usual That was the vear of the Rondout rob unts a week before the robbery attempt, bery a few miles out of Chicago, prob nd their father admitted they frequently the most daring mail robbery in histor taved at the cabin on the range, so the and the largest in point of loot ke irld-wide search for them was actuall\ Planned with the connivance of post tarted within a few days after they had inspector who went wrot the only case committed the crime and fled from the incidentally on record in which that ha dynamited train. happened—the Rondout robbers intro- POPULAR MECHANICS 901

a0 ¢ 535 postal in- spector annually solve more than inety per cent ot the cases ot mail theit ccording Oo (rant B. Mille chief of 11 spectors | t vea the sent <ty en to penitentiaries n 1 or holdup cases, '\ | 11e@ overt 3000 were ippre- hended on mino theit charges In 1926, of tourteen mayor crimes against the mails, in wh $1,408,340 was stole he inspectors reco,

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POPULAR MECHANICS gas equipment of thei own, so the fumes cou be released along sides of the cars. Spe portholes turned the into serviceable fort Under such conditi attacks on mail trains almost impossible ot cess, and the major b ditries nowadays usu take the form of an tack on a postal trucl some isolated station ju after a factory payroll Toe WR a bank shipment ‘ ; been received. Testing a New Bandit-Proof Mail Car, Built to Withstand Bullets and Gas Miller, who person il] and Well Armed Within has run down sixty-t bandits, sent them to prison for combine forcing the mail-car crew to open the terms of more than 2,000 years and reco duced the latest thing in bandit technique, doors by throwing tear-gas bombs through ered from them more than $3,000,000 the windows, while the robbers came pro- loot, participated in unraveling one su vided with gas masks to enable them to crime in 1926 just before he was n do their work. They got away with $2,- chief inspector. 200,000. Eight men were involved, in- On April 14 of last year, a mail tru cluding the postal inspector. bringing a load of registered mail to The Rondout holdup was followed by post office in drastic changes in postal routine. Marines were called out to ride the trains and or- ders were placed tor bullet-proof steel a Chicago suburb, found touring car blocking the entrance to rear door. The driver got out, apparent to see why his car wouldn’t run, mail coaches by hundreds, while the clerks drew a_ revolver, seized two vere given increased armament, gas pouches of registered mail, masks to resist tear gas and provided with then ordered the postal New Type of Mail Truck; the Armed Driver Rides in a Bullet-Proof Cab, Ready to Meet Bandit Guns with a Shower of Lead, While Steel and Bullet-Proof Glass Guard Him

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POPULAR MECHANICS 903 Assistant Postmaster-General at the Sorting Rack of a Mail Car, with a Marine Marksman and an Armed Postal Clerk, Who Carries a Gun While Distributing the Letters e into the touring car and forced to drive it to Joliet, Ill. The bandit n the reat seat and searched the hes during the drive, extracting OOO in cash lust outside of Joliet, the bandit’s car ed ona slight incline. Though threat- ed with death, the mail driver, a boy of inable to make the grade, _ - f -" even the bandit, who took the wheel, nt negotiate it, so he decided to back garage and have the clutch fixed. He . to keep the driver covered with a ver in his coat ket while the ga- e man worked on the car, but the driver poc ceeded in vetting the car between them an to a farm house to telephone for e sheriff. he bandit, becoming nervous, got the » mail pouches, walked out the garage and disappeared and then enters e one unsolved my stery of the case. The oliet police blotter shows the bov re orted the robbery at 10:10 in the morn- ing, and at 10:25 a physician in a village 1 twelve miles away reported he hac held up by an armed man who Later it was shown the bandit was the auto thief, though how he traveled the car, an fifteen min- he twelve miles in not more tl utes continues to be a mystery, for refused, when captured, to explain it. At any doctor's \ illage rate, a deputy sheriff from the started in pursuit, driven by a garage man, and overtook the bandit, dead, but not fired who shot him before the official had one shot windshield of the stolen car, the ] face. A tax! glass cutting the bandit’s ] through the cab chauffeur was found later in t who recalled a passenger bleedin cuts on the face, and carrying two bag the first and the sheriff's slayer were one and he intimation that the mail robber same person. Various clues fixed the bandit’s iden itv. and his home was t had been ab indoned.

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904 had not left Chicago, the inspectors ar- ranged with a friendly newspaper reporter to publish an item saying the sheriff had killed foreigner whose body was found near by, and that the post office been by a inspectors believed the foreigner was the mail robber and that he had hidden the loot. That item inspired the bandit with a POPULAR MECHANICS false sense of security, and, six days lat the inspectors, who had been follow every clue, tracked him down in his ri in a Chicago hotel, where he had bs living in the belief that no one was looki for him. He got life for the killing twenty-five years more for the mail bery, and all the loot, with the except of $148, was recovered. TWIN SIDECARS ON MOTORCYCLE CARRY TWO CHILDREN Room for Most of the Family in This Double-Sidecar Mo- torcycle; Children Balance the Load and Are Protected by Shields Instead of having a single car on side, a motorcycle owned by an English rider has a small car on each side, afford- ing individual compartments for his young one son and daughter, who often accompany him on his trips. MEASURE BILLIONTH OF INCH TO TEST WIRES To find out how much wires of different composition expand or contract when magnetized, a scientist of the Bell Tele- phone company laboratories has developed an apparatus that measures a billionth of an inch. It will also register a millionth of a degree in temperature. It is the most refined measuring apparatus in existence today, surpassing the interferometer, a delicate unit that splits distances into tiny gaps of light waves, by about 100 times in sensitivity to changes in length. Whet temperature varies as much as one-th sandth of a degree, a spot of light r across the scale. The instrument was vised for research into the nature of netism. No one knows exactly what m netism is, but it is of prime importance telephone company because it plays an « sential part in the transmission of sou waves in telephoning. That is the « reason why permalloy, a special mixti of nickel and iron, became so valuable cables. It proved extremely sensitive magnetization and was rapidly put in p! of pure iron in loading coils and other vices for transmitting sound. A was wanted to help study the ato: changes which take place in different loys as they expand or contract und magnetic forces. P. P. Cioffi, a labo tory scientist, was put to work on problem. In a month, he had devise plan for the instrument, but many mont were required to perfect it. ICE CREAM FROZEN IN GLASS WITH COLD TABLETS Patented refrigerating tablets may used as a substitute for ice in a that quickly pre- small quan- tities of ice cream with little work. The cream itself is held in an inner aluminum con- tainer and agi- tated with a crank- operated scraper. The outer cham- ber is of glass for the ice and salt or the special tablets. It is said that the cream can be frozen in about ten minutes ree: pares

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POPULAR MECHANICS or Movies in Italy; Projector and Screen Are Carried in Auto Trucks to Remote Towns, and, Besides Giving Entertainment, the Plan Is Helpful in Spreading Propaganda MOVIE THEATERS ON WHEELS SERVE ITALIAN TOWNS olini is making use of the motion- re screen in a special way to trans- vord to the inhabitants in small towns. Several auto trucks, with tors and a screen that can be quickly up outdoors and taken down for pack- onstitute a fleet of traveling motion- var hy re theaters which spread propaganda. RAILROAD INSIDE ARCTIC CIRCLE HAULS IRON ORE Fiord in Norway. Special precautions have been taken to prevent landslides and the fall of avalanches along the road. HIS CONTORTIONS HELP TO WIN MOTORCYCLE RACE Credit for winning a motorcycle race in London recently was divided between the driver and the occupant of the sidecat much of the honor going to the latter. By his clever contortions on curves, he pet mitted sharper turns than could ordinaril have been made, thereby cutting down time and distance. reading its way ugh ice-clad moun- the Arctic railroad i rich deposit of iron 150 miles within the tic circle, to supply e blast furnaces of rope with material for manufacture of spe- steels. The demand Sweden’s remarkable ipply Of magnetic iron is the reason for the nstruction of: the rail v which runs from the edish town of Lulea, ir the head of the Gulf Bothnia, to Victoria lavn on the Ofoten Helping to Balance the Racer at a Sharp Turn; the Pilot’s Passenger in the Sidecar Prevented Upsets

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POPULAR MECHANICS = Honor to a Pioneer Explorer of the Skies, Tycho Brahe, the Danish Astron- Unveiled omer; This Monument Was Recently HONOR TO EARLY ASTRONOMER IN MARBLE MONUMENT Tribute was paid recently in Sweden to the Danish astronomer, Tycho Brahe, by the erection of a celestial globe of bronze on a white marble base. The monument Crown the latter half of the sixteenth century, his in- by the of the icted time. He regarded the phenomenon as thing divine” could in Helsingborg Gustav. unveiled 1 nV Prince Brahe lived during terest in astronomy being excited punctual occurrence of an ecl sun on Aug. 21, 1560, at ! ipse the pred “some- and straightway read all he find on the subject of astronomy and began studies with globe and com- passes, althy he was supposed to be fitting himself for the law He gained in and is credited with doing a the support of the king of Denmark a few vears. Valu vast amount of work in correcting errors of earlier obser and computing in mental inaccuracies. “BLOODY SWEAT” OF THE HIPPO RED PIGMENT The “blood-sw eat behemoth” of the cir | display,.does not re sweat blood at all, red fluid on its skin bei: an substance, when the ani: is excited or in pain ilv OLY creted color is due to a peculi carmine pigment in thx skin, which is | thick two pl inc] In some ace HEATER FOR AUTO ELIMINATES THE BACK PRESSURE Prevention of b pressure on the mic and an abundant sup of fresh, hot air, free fr fumes, are cited = the advantages of Mcaice vo automobile heater wl in utilizes the warmth of t exhaust gases. The system consists ot air-intake pipe, in front of the directly behind the fan motor, and a series of tubes where the air is warmed as it cor in contact with the pipes, heated from tl exhaust. The warm current delivere through a register in the bottom of tl car. 1S The only moving part of the inst lation is a valve to control the fresh and the heat is regulated from the dash a aa Installation of Heating System for the Auto, Utilizing the Warmth of Exhaust Gases

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POPULAR MECHANICS 907 | | Ae x : ist-Guard Flyer Preparing to Drop the Trailing Gear to Pick Up the Life Line as His Plane Races Out to Sea above the Shore Masts Which Replace the Life-Saving Cannon Throwing Out Life Lines from Airplanes New Method of Rescuing Crews of Wrecked Boats Is Adopted by the Coast Guard after Successful Tests \ MPHIBIAN planes, capable of taking off from or alighting on either land iter, are being used at two American t-guard stations instead of life guns irry rescue lines to wrecked ships off ire. Developed as the result of five rs of experimenting by Lieut. Comm. C. Van Paulsen. of the coast guard, the rial life-saving service is able to establish reeches-buoy connection with ships a le or more off shore, instead of being ited to a few hundred yards, as is the ise with lines thrown by the small har- on cannon. The record distance for a nnon-shot-carried line is 695 yards, hereas the planes are effective at several times that distance. rhe problem of taking a line out to sea air was complicated by the fact that the plane could not take off while burdened with a trailing rope, so must pick up the life line after it was actually in the air. Comm. Paulsen solved the difficulty by attaching the end of the line to a cross rope swung between two masts placed 200 feet apart. The plane, after getting under way, circles about and passes over and between the two masts, while the observer lowers the weighted end of a light rope, carried on a reel in the airplane. The weighted rope tangles with the line between the masts, jerks it free and carries it out, trailing the life line after it. The airplane flies straight out and over the ship in distress, and the observer then cuts the rope and allows the line to fall across the deck, From then on the procedure is the same as in the usual rescue work with breeches-

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OOS 1.1 en | ~ ° ackies Phe first li buoy t 1 oht line is used 11] a somewhat heavier tackle out to he ship. l to pi After it is made fast, the coast- crew ashore attaches the still heavier rescue cable and it is hauled out. After the ship's crew has made the fast. the } ull the — 1 1 preeches DuOy\ guard orion is 1 back big line. 1 Gloucester, ane Mass., be equipped ions to Thev were chosen because tl] already been provided with the loening amphibian planes, of type used by Comm. Byrd in Greenland around South America. lhe planes were purchased originally for ie aerial patrol against rum ships off Bos- ton, New 1 York and New Jersey shores. e life line used is so light that the ful planes can take the end a mile the dragging No reels are used for the friction stop the line, whether or trailed or sea before weight too great. rd lines, as would fired from In- the line is coiled in a complicated from an airplane. n about pegs set in a wooden trame POPULAR MECHANICS laid out something like a chessboard. pegs are then withdrawn, leaving the “faked,” as sailors say, in such a way it will run out without tangling, and \ out friction. The Lyle sands of has since its gun, which saved tl] lives invention David A. of the U. S. a: the reliance of the c guard for a half century. It is a bronze cannon, weighing, Lieut. Lyle, has been chief with its eis een-pound projectile to which the lit attached, slightly more than 200 pou Once the line is made fast to a ship, it be used either the buoy pair of canvas trousers, knee-length which the rescued person is suspend and dragged through the waves, or for water-tight life car, built like a small su marine and capable of holding a of people at each trip. the successor of for breeches num! The Lyle gut one of the oldest for of rescue apparatus, a powerful crossbow mounted on a wheeled carriage and bent by turning a crank, which, with an rangement of cogs and line, brought t] bowstring back until it could be caug by the trigger. Coast-Guard Amphibian Airplane Coming Back to Land and Mounting Its Own Runway; the Planes Are Equipped with Both Boat Hulls and Wheels for Land or Sea

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POPULAR MECHANICS 909 The Life Line Is Attached to a Rope Sus- pended between Two Masts on Shore, and the Trailing Gear from the Plane, Flying Over- head, Picks It Off and Carries It Out to the Distressed Ship Coast-Guard Cart and Breeches-Buoy Equip- ment Being Rigged to a Shion Which Has Gone Aground; the Planes Will Aid Ships beyond the Reach of Life Guns

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POPULAR MECHANICS

battle tanks mou; small field artillery, | anti-craft gums on tt mounts,andt equipped with wit rumbled after them. O head attack and pu airplanes soared dipped while they sp: the advancing steel with bursts of macl gun fire. The maneu continued day and under condition nearly like those of actu

—-"* : ‘ war as could be prod ¥ wie ‘ " ° ° : ae eR Me nD on Salisbury Plain. ~~ ‘i " . a “The roar of the engines used in the t and tractors, the FIRE STATION LIKE RESIDENCE crackle of machine-gun fire, and the c1 BEAUTIFIES CITY ing of eighteen-pounder quick-firers nerve-racking,” said one of the correspo1 Home for One of the Oakland, Calif., Fire Companies; the Engines Are Housed in Garage Space in Basement The city of Oakland, Calif., has intro ents who covered the maneuvers. duced a different style in fire stations. In- army on wheels traversed a rugged coun stead of the usual garagelike structure, its try in the robot maneuver latest unit is patterned after the plan of a “The engagement was like an evil dre residence, with space for the engines in with mythical gray monsters spitt the first story and men’s living quarters flames and death. Noise, smoke and above. It is made of brick and concrete. ceasing clatter lasted nearly an hour : deadly single-seater fighting planes s the crews of tanks and motor cars RADIO-EQUIPPED ARMY TANKS jecurate fire. DIRECT MANEUVERS “Road bombed out of existence,’ An army of “robots,” mechanical monsters carrying gas-masked men, was mobilized re cently when the British army held five weeks’ maneuvers for the me chanical force, which cor- responds to the American tank corps. Little two- passenger tanks, mount- ing a driver and a ma- chine gunner behind steel breastworks, sped across the fields on endless treads, or switched in a twinkling to rubber-tired wheels and dashed down clear roads. Four pas-

senger tanks, with guns in conning towers, huge Radio-Equipped Tank Used to Direct Battle Operations in British Maneuver: ‘ ‘ of the Mechanical Army

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POPULAR MECHANICS sage flashed back from the wire- outs. ‘Make your own way across ’ came the command. ‘n the mechanical army moved, the rd pace quickened; one-man tanks hurriedly over the banks on the the road on their scouting duty. with their wheels within scuffled at dangerous angles into lragons,’ ‘n country, the crews clinging peril- to their seats. Heavily “armored on tracks, wallowed lustily through iver bank, and among brushwood. land liners—the eighteen-pounder firer guns on self-propelled mount- wept into position, the gun crews ng to stations. uldenly three airplanes, like falcons, ed out of the bank of leaden clouds. is a startling moment. The unpro- vehicles out in the open field, bal- ng precariously as their speed in- ed, hurried for the shelter of the trees. in the dragons opened fire with their is the falcons swooped down.” FOLDING COVER ON TYPEWRITER PROLONGS MACHINE’S LIFE To keep dust and dirt from the intricate parts of the typewriter, a collapsible cover now on the mar- ket locks securely when in place, fits down over the ma- chine like a and is to open or close. It is proot against dust, is perma- nently attached to the machine and is juipped with an adjustable copy holder. bel- lows, easy TILT STOPS GLASS REFLECTION IN BUS WINDSHIELD By tilting the windshield of the motor- us forward from bottom to top and ainting the ceiling over the driver’s seat lack, an eastern company has found an etfective way to eliminate reflection from the lights inside. The plan is said to con- tribute to the safety of night driving. Anita Loos, Testing the Color of Helene Millard’s Hair with the Shade Chart HAIR TESTS WITH COLOR CHART TO IMPROVE MOVIES The actress for the motion-picture part may be beautiful and “screen well,” but is her hair the proper color? The question is a very important one in the minds of the moving-picture photographers, and_ to answer it, a special color-testing chart has been devised. The candidate’s quickly and easily compared samples on the card, all of hair is the have with which been photographed to determine their values in the finished picture. In _ this particular case, the performer's hair had to be as light or lighter than color No. 5 on the chart. AUTOMATIC VALVE ON RADIATOR REGULATES TEMPERATURE Direct control of room temperature is said to be af- forded through a thermostatic valve attached to the ra- diator. It requires no power or spe- cial piping as it is self-contained, and there are no dif- ficulties due to leaks, lodgment of the manufacturers ture may be varied. other troubles, The dirt or claim. tempera-

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POPULAR MECHANICS being played fri statue near by and path, swept acro station’s antenna. \\ this signals grew evel occurred M eaker phenomenon is in mony with the fact radio reception is u better at night tl 1 . 1 - 1° ing the day, for light and radio waves. ently “clash” in mysterious way t disadvantage of the ] It has been suger that the bright illu: tion in the cities ne dio broadeasting stat is one reason why be reception at distant p is not accomplished weak searchlight pr bly would have no ap ciable effect, however PAVING BLOCKS LAID WITH MOTOR In laving street pai blocks in Denmark, a1 Big Coast-Defense Rifle in Action during Marksmanship Test; the Gun Is Mounted on Railway Carriage for Easy Transportation SHOOTING TWENTY-SEVEN MILES TESTS COAST GUN Marksmen «were given an opportunity to test their skill recently when the gviant Fort MacArthur, Calit., was given its first service firing. coast-defense rifle at This huge piece, mounted on a railway carriage, so that it can be transported to points of vantage quickly, has an effective 1 range of over twenty-seven miles. RADIO IS WEAKENED BY LIGHT SHINING ON AERIAL Operators of radio station WLWL, in New \ ork city ago to disc: 1 were mystified not long ver that the signals percepti- bly weakened and then during the broadcast. showed tl] grew stronger Examination 7 ig@nt was a powerful search] — tor-driven pounder been employed with cess. It is said to dot work of several men at a saving of t1 and expense and also performs the t more thoroughly. The outfit is somew! like a small pile driver and the force of 1 blows can be easily regulated. Placing Paving Blocks with the Portable Pounding Out fit Operated by a Motor

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POPULAR MECHANICS \ .TER-SOAKED LOGS SALVAGED FOR LUMBER PROFITS nnesota lumbermen are realizing :s from the wasteful methods of their ecessors, in salvaging logs which long been under the waters of woodland in the old timber districts. Millions shteen and twenty-foot cuts, entire and other timbers in an excellent of preservation, have been pulled the lakes with big cranes and cut boards. Much of the wood is of su- or quality and it does net warp like timber. More than 3,500,000 feet umber was taken from one lake last and like quantities from others. Re- il of the logs is also an aid to users inoes and motor boats. SELF-CHALKING PLUMB LINE SAVES WORKER TIME lor carpenters, contractors, masons and hers who use a chalk line, a self-chalk- a ing cord on a reel “~~ that fits into the pocket, saves time and trouble. There is a chamber at the top which is filled with powdered chalk and a pat- ented device pre- vents the contents from spilling. The reel is quickly wound or un- wound, keeps the line from tangling and knotting, and can be folded out of the way. GLASS FUSE PLUG DISCOLORS WHEN IT BLOWS OUT Detecting blown fuse plugs of the usual type is not always easy, but can be done t a glance with a glass plug recently in- troduced, the manufacturers claim, as it iscolors at an overload or short circuit. he effect can be seen in the center of the top of the plug, and the unit is installed n practically the same manner as it is in the ordinary ones. Did Aztec Children Play with Toy Soldiers? This Figure, from Burial Mound, Indicates That They Did TOY SOLDIER CENTURIES OLD FOUND IN BURIAL MOUND Interesting pottery images, believed to antedate the days of the Aztecs, were un- covered from a burial mound in Mexico recently. Among them was a figure of a warrior, indicating that toy soldiers may . ¢ : have been popular even then. Small statues of dogs were also found. GOLF-BALL BRANDING STAMP AIDS IDENTIFICATION Golf balls are quickly identified with the owner’s initials in indelible ink by the use of a marking stamp specially adapted to fit the contour of the sphere and to hold the letters so that they can- not slip out. The outfit includes the stamp, pads and a supply of ink.

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POPULAR Trailer and Sidecar Fit This Motorcycle for Carry- ing the Camping Party and Equipment CAMP TRAILER ON MOTORCYCLE CUTS OUTING COSTS Vacation and its camping trip at less cost was the object of an English motor- cyclist who rigged a trailer for his cycle. An advantage of the outfit was that it could be taken to places difficult to reach by automobile so that more secluded camping spots could be enjoyed, time saved and expenses reduced. SLOT MACHINE CANCELS LETTER ELIMINATING STAMPS MECHANICS FLOATING SERVICE STATIONS FOR LINERS Fifty miles outside the Golden Gat: trans-Pacific liner rolled, power in her « gines only sufficient to hold her head the seas. Her wireless crackled the st of her battle with winds and waves, t ing in dots and dashes that her tanks | drained until she had not enough fuel reach San Francisco. Five hours late: what seemed a submarine riding on surface, noiseless as a floating shad swung in a wide circle until she lay alo: side the pitching steamer. A great | was lifted, passed inboard, and a hun of a swarm of giant bumblebees a: from the small boat. In half an hour, t submarine had become a monitor, ri as she poured her own contents into t liner’s tanks, showing herself for wl she is—a floating service station for de¢ water steamships. The general idea oi tanker is that of a huge, sluggish ves stored with thousands of barrels of bound on long voyages. But up and do the Pacific coast, the oil-refining corpor tions have devised toy tankers, small craft few of them more than 150 feet long, ma: of them much less, carrying from 1,000 1 2.500 barrels of crude oil, devoted to t servicing of ships. They also force the streams of liquid fuel over thousands feet of land lines, supplying gas-man facturing establishments, truck tanks, f road builders, factories where oil is burn: under steam boile: Use of a cancel permit for letters as a substitute for stamps is made available to the pub- lic in a slot machine introduced in Eng- land. The envelope or card is placed in a slot, a coin in- serted in another and the mark is stamped on by turn- ing a handle. After the envelope is can- celed, it passes into a compartment where and, in times storm on the ba and harbors, flo ing the waters w oil, so that oth and larger shij may make the berths of protecte anchorages in pet fect safety. @ Write our Bure of Information you wish to kno who makes or sel! any article describe it is later collected bv the postman Slot Machine That Cancels in this magazin¢ ©P.&A Send no postage Letters, Saving the Use of Stamps; It also Serves as Mail Box the service is free.

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9] POPULAR MECHANICS PUTTING ZIP AND SPEED INTO WINTER SPORTS Even a Discarded Automo- bile Tire Can Provide Thrill- ing Sport on a Snow-Cov- ered Hillside, If the Rider Is Young and Flexible Enough to Curl Up Inside Sail-Skating Is a High-Speed Sport; the Old-Time Square Sail, That Carried the Skater Only Be fore the Wind, Is Being Displaced by This Cat-Boat Rig So as to Permit Hizher Pointing Ski-Joring, with the Riders Pulled behind a f Horse, Was _ Introduced } Abroad, but American Snort Enthusiasts Have Improved on the Game by | Using Automobiles and | Motorcycles, and Even Airplanes; the Automo- bile System Is Particu- larly Good, Because Either Rider Can Fall Out with- out Danger to the Other, t ¢ as Is the Case When All Hold a Long Rope e & | £ ee RT » O e|! ye ime Ze

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Earl Sande,America’s Premier Jockey, Wearing the Floral Horseshoe after a Victory on ‘“‘Sarazen”’ By A. A. ALBELLI —— chief thing about winning a race,” declares Earl Sande, America’s high- est-paid jockey, “is to know your horse. I don’t mean being acquainted with the horse, but knowing it—knowing its dis- position and its temperament. Horses are as temperamental as prima donnas. You and the horse have got to be buddies.” “Taking it for granted that you know your horse well, how do you manage to push him out in front during a race?” he was asked. “The best way I can explain that,” he replied, “is to take the first day of the races here this when I won the Sara- toga handicap with ‘Mars,’ son of ‘Man o’ War.’ ‘Mars’ is just like the rest of his kind, a fine mount. That was one of my typical races. I left it to somebody eise to be the pace maker. But the start is very important. Ground lost at the start is hard to make up. I made it my business to get the measure of season | got my good start. good 916 the field as soon as we made the first turn. T| I eased off a bit to ¢ ‘Mars’ a_ breather when I was ready spurt through, the « was right with me. “The thrill of shoot ing down the hor stretch past ‘Black Mar to beat that filly by length and a half, one I shall never forget “In that particular race Mr. Sande, who was that won, you or horse? Is the race tween the jockeys or t horses ?” ““Tt’s both,’’ he sponded. “It is that cor bination I was telling ) about which is struck 1 when the jockey gets on good terms w the horse. Then the two of you made one. The one cannot win with: the other.” “T think you are known to be a ha: rider, Mr. Sande.” “You bet. That’s just what I want be known as. I never use a whip on horse. I don’t believe in it. Horses sk up and swerve when whipped. I ha seen many instances where jockeys ha lost races they might have won if the hadn’t resorted to the whip. “Race horses are almost human in th respect. You are their friend. They r sent it very much when welt the: with a whip. Sometimes J think their fee! ings are hurt. Instead, I kind of like t jolly a horse along. “That is something few riders can di I think I have developed the knack to pet fection. I actually talk to my horses. give them baby talk. At the same time | you

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Fourteen Youngsters Thundering down the Track in a Race for Three-Year-Olds at Belmont; the Picture Was Taken 150 Yards from the Start, with the Field Still Bunched them with my hands, sort of slap them ntly to spur them on. But I never lose head and abuse them. Horses are mest, usually, and they'll always give the best that’s in them if you only it them right. “*‘Mad Hatter,’ which I rode in 1924, This rid- racket requires masterful strategy. No ed to be a good one for that. o races are the same, no two horses are e same. I used to have ‘Mad Hatter’ that he knew when the cue me to overhaul the bunch. We'd be rid- ng a little behind two leaders, then all of sudden I would crouch over and barely vhisper to ‘Mad Hatter.’ “I used to say, ‘Whoa boy! Easy now! We're winning,’ and sort of pet him. I | vould keep a light pull and keep talking to him, then suddenly I'd jerk and give him free rein and he was off like a bullet.” “Is the aware of the fact that he is running a race?” » trained horse , “If I can help it, I keep my horse from ae ; eing race-conscious. I don’t let him | notice the pace. Naturally a horse does not know he is running for a rich purse, though he is usually aware of the glory that awaits a victory. “Then, when the horse finds that the track ahead of him is cluttered up with other horses, he just naturally lets out and runs around them. But that doesn't always work. and There are different types different temperaments. The nip- and-tuck variety of race, with quick think- ing on the part ot the rider, is the most common. The rider has got to be keen and ready to take advantage of any open ing. Being on the alert and grabbing off the chances when they loom, is one of the strong points. “For instance, I have been credited with an uncanny knack of starting a winning drive with a stolen length or two before my rivals realize that I have thrown myself heart and soul into the race. I always try very hard to win every race. I think that my untainted by vanity, mind you—together with my ex- perience in riding most often carry me through to victory.” self-confidence 917

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POPULAR MECHANICS Weighing in Jockey Sande with All His “Tack,” In- cluding Saddle and Lead Weights “Is there any money for the jockey in the horse-race business ?” “A good jockey will always find fair compensation. At the present time I am not under exclusive contract to anyone. Joseph E. Widener, the Philadelphia mil- lionaire, has first call on me to ride his horses. He pays me $15,000 a year for that privilege. Otherwise I am entirel) free lance. “Take that Saratoga handicap. ‘Mar was owned by Walter M. Jeffords. T! purse was $8,000, of which I receiv: $1,000. The rate is usually ten per c of the purse to the winning jockey. didn’t figure that bad pay. Doing the n and a quarter in 2:0735 I brought 1 owner about $63 a second, while | earning about $8 a second for mys: Not bad pay, eh?” “What do you earn annually?” “IT make about $50,000 a year.” “When did you first start riding? “Gosh,” said this blond-haired yout who doesn’t look his twenty-nine years, ° goes so far back I can’t remember.” “Well, what is the first horse-riding « perience you remember?’ “That goes back to the time my fami! lived in American Falls, Idaho. I w fourteen then. At that time we were ver poor. My father was boss of a sectio: gang on the Milwaukee railroad. “Without letting my mother and fath: know anything, I traded some ducks a1 my father’s shotgun for a little roan nam: ‘Babe.’ My parents nearly went cra; when they found out what I had done. thought they were going to kill me. But it was done and couldn’t be undone. “I started to ride ‘Babe’ in some of t! pick-up races around the ranches. The: a cowboy of varied fortunes, who h seen me ride ‘Babe,’ wanted me to ri his ‘cold-bloods,’ which is a half-thoroug! Start of the Race at Jamaica, in Which the Colt ‘Sting’ Set a New World’s Record for the Distance of a Mile and Seventy Yards; the Barrier Is Seen above the Horses’ Heads

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POPULAR MECHANICS 919 a. : ‘ -, en PinS ay PO as = tan ait Peanuts,’’ a Great Handicap Horse, Winning the Empire City Handicap, with “‘Sanford’’ Two Lengths Behind; Note the Jockeys’ Crouch, Developed by Tod Sloan “l, in some sprints. There was a sort rodeo and carnival in town that sum- er. I got $2 for riding that man’s horses. name was Burr Scott. “That winter I returned to school. One Scott sent in a note to the teacher, ting he wanted to see me. He said he el my way of riding and wanted me go with him to Phoenix, Ariz., where said I could make a lot of money as a key. So I ran away. We didn’t do so well, and Scott got couraged and quit the game. I started loping horses for $25 a week. At the re of nineteen I struck out for New Or- ns. Here [ won my first professional ice with one of Joe Goodman’s horses.” From that time forward, Sande began » Win. He took the Kentucky Derby, he blue-ribbon event of the American turf, twice, once with “Zev” and again ith “Flying Ebony.” He won the his- ric Belmont stakes four times, the Sub- urban handicap three times, the Metropol- tan handicap twice with “Mad Hatter” ind he was second in the Futurity thrice. Sande has won so many races he has st count. In 1925, he went through with 718 winners out of 2,680 starts. He says ls average has been about the same since. Harry Sinclair, of the Rancocas stables, whose horses Sande rode one year, has earned more from Sande’'s services than anybody else. In that one year Sande netted Sinclair $564,000. “In the old days,” commented Sande, “I used to ride the whole card of six races a day for $10.” The life of a jockey, however, is not all clover. It is perilous. There are hardships to endure. One must fight against mental hazards and depression which might grow out of adversity. In 1924, Sande was badly injured at Saratoga while trying to edge through an opening next to the rail. He suffered a broken thigh. The wiseacres said he was through. Later he came back by winning the Derby with “Flying Ebonv.” The jockey permits himself no dissipa- I tion, no matter how slight. Sande neither drinks nor smokes. Then there is the weight to think about. Every morning Sande takes to the road and jogs along for several miles He is heavily clothed so as to knock off weight. He savs when he can’t make the weight, about 115 pounds, any longer, and th to harden, he'll become a trainer. “But e muscles begin that’s over ten years off,” he said. “What are the opportunities for young men in the jockey field?” he was asked. “Well,” he said, ponderingly, “well, I've told my story. Now if you were a young man what do you think? Would you want to do it? It's a matter tor the in

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920 dividual to decide. Only one thing I say, the young man who contemplates the jockey game wants to be sure he can stand the gaff, there’s an awful lot of ups and in the game. It takes a_ brave heart to fight it out.” dow ns BUILDINGS “EXPLODE” IN WIND TUNNEL TESTS SHOW Model Smokestack on Bureau of Standards Laboratory Which Is Studied for Wind-Stress Data Interesting data concerning the be- havior of structures of different kinds in severe winds are being gathered by tests at the bureau of standards. One of the units employed is a model of a typical fac- tory building, erected within a giant wind tunnel through which strong air currents forced. Preliminary results seem to that suction rather than pressure tends to cause the building to explode outward rather than collapse inward. An- other test involves a chimney, ten feet in diameter and thirty feet high, on top of one of the laboratory buildings. It is punctured with twenty-four holes in a circle, each hole connected with a pressure gauge so that experts can measure the amount of suction and pressure for each direction of the wind every fifteen degrees around the stack. Information obtained from this test will be arranged for the benefit of builders seeking to construct are show POPULAR MECHANICS the strongest stacks within the range efficiency and economy. Other expe: ments are staged to determine how mu: of a motor car’s power is used to push t! air aside and how aircraft behave in cu rents of varying velocities manufactur: in the “cave of the winds,” the bureau big testing tunnel. EARTH CRUST SIXTY MILES DEEP ACCORDING TO SCIENTISTS Data gathered by the coast and geodet survey indicate that the earth’s crust more than sixty miles thick, but that doe not mean that the interior below is nece sarily a molten, flowing mass. By “crust, the geologists mean the outer layer of th earth within which certain densities may be maintained, and their estimate as to its thickness was obtained by mathemat ical analysis of various earth movements The crust is believed to be comparativel) weak in order that internal adjustments may be made as readily as they are, after quakes, for instance. The investigators hold that the earth is solid throughout Shifting of materials horizontally at the surface or below the crust, sets up stresses which express themselves in earth tremors These occur almost every day as the seis- mographs prove. . TESTER FOR ELECTRIC WIRING SIMPLIFIES REPAIRS sroken places in insulated electric wire can be located, without the necessity of extensive remov- , with a novel tester recently in- troduced. It is constructed like a pair of pliers, the upper jaw being lined with old phonograph nee- dles of metal. When these are pressed into the wire, the live side is quickly revealed on contact with the needles, but the tester is insulated to prevent injury to the user. It is said that the instrument does not damage the insulation on the wire. als,

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POPULAR MECHANICS 921 Ta RABBITS SLAIN BY THOUSANDS IN MONSTER DRIVES ing to the decreasing numbers of ng the End; the Rabbits Have Been Rounded Up over a Wide Expanse of Country, Driven into the Corral and Will Be Killed; Drives like This Are Needed to Save Crops seasons, the do not creat damage. In California, losses caused rabbits cause such by the animals have run as high as $600,000 es, coyotes and other natural enemies, ick rabbit is prospering in many parts he west and, some years, infests the in such large numbers that whole- slaughter is sary. This is plished by a ve in which hers and towns- over a wide i participate. e brush is beaten miles around, » drivers advanc- on foot, horse- k, buckboard auto, until the rds of rabbit are ven into a corral rough a V-shaped rricade. They are en killed. Twenty usand or more iy be destroyed a drive of this nd, and, for a few Removing the Stencil Protectors After Skin around Them Has Been Sunburned to Produce Designs a year in one county. FANCY SUNBURN WITH STENCILS LATEST FASHION FAD Stencil papers, cut in various patterns and applied to the skin, leave lighter areas when they are removed after ex- posure to the sun, so that an “artistic” sunburn is pro- duced. The method proved popular last season at swimming beaches. Fruit have used this system for some time on apples and other products, in- itials of the orchard owner and elabo- rate growers being made on the fruit in the same manner. designs

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POPULAR MECHANICS WHAT THE AIRMAN W SEES BELOW If the skies are an aviator at a heig! 6,000 feet can see than eighty miles. flying has pushed the horizon is app when it is realized tl man tall, standing at se five feet six can see but two and half nautical miles the ocean. Ascet1 but 100 feet increase limit of his vision to 1 than ten miles, at feet he can gaze Screen along Roadway, in Oregon, to Prevent Oil from Dripping into the Stream and Killing the Fish FISH GUARDED FROM ROAD OIL BY CURTAIN ON BRIDGE road into a trout stream in Oregon has injured the fish and marred the paint on the bridge, Oil splashing from a motor but the highway commission has found a way to end the nuisance by stretching a tar-paper curtain along the guard rail. It is securely fastened placed high protect the bridge, while the barrier below keeps the oil in from the road. and enough to from trickling THE MOST DIFFICULT RAILWAY COVERS SEVENTY MILES Twisting through a mountainous coun- Mack, ( lo., Watson, Utah, the Uintah railroad is officially rec- ognized as the most difficult erate in the United States. It try between and line to Op- is seventy miles long and is used principally for haul- ing a mineral employed in the manufacture of shellacs, varnishes, lacquers and insula- tion for high-tension electrical appara- the road climbs from an altitude of 4,541 to 8.437 feet along another stretch curves to the tus. In thirty-five miles, , and there are nearly mile. A specially constructed engine was necessary for this twenty road in order to negotiate the sharp curves and the steep grades. In places, the bends attain a curvature of sixty-six degrees. than fifty-eight mile fore the feres and at 6,000 feet horizon } can command a circular area with a d eter of 167.76 nautical miles, the hor being half this distance away. A naut mile is slightly more than compared to the usual 5,280 feet. OU0U teet SEVEN-MILE BALL OF STRING AN EXAMPLE OF THRIFT As an example of thrift, employe the post office at Loomis, Calif., s: bits of string salvaged from packages had an ball « twine. before long enormous taining nearly seven miles of feet in cireut to the post ment in Washington. sphere, measuring five ence, was sent office dep i Seven Miles of String, the Result of Saving Bits fror Post-Office Packages at Loomis, Calif.

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ER REFUGE FOR WILD ELK ‘1VEN TO GOVERNMENT to 1,760 acres of land in the Jack- le country of Wyoming recently 78 en to the government by the Izaak ee league, as an additional refuge eding ground for wild elk that are out of the high portions of Yellow- ark and near-by country with the ch of winter snows. The land was sed by popular subscription, more 1(),.000 being raised from as many utors. Between 8,000 and 10,000 fed there each year. Two men are d to grow and harvest the hay, s distributed to the animals through- he winter until they can return to usual feeding grounds. TAN WI! oo SCOOP FOR ICE-CREAM CONES an SAVES TIME AND TROUBLE ng ice-cream cones with the ordinary r or disher is often attended with t e, loss of time and breakage of the These difficulties are said to have eliminated in a special scoop that es a serving of the cream to conform weg with the cone and | permits dropping it in, point down, so that it fills the con- tainer and does not drip from the sides. An outward movement of a small thumb piece on the scoop al- lows the cream to fall into the cone. unit may also be used for jelly, pud- ngs or other dishes for the home table. FARMYARDS AT SEA nstallation of flower gardens on some the ocean liners, from which come deco- ons for,the dining tables, recalls a queer it that once plied between England and eland. It was operated entirely by wom- and was the sole means of livelihood of )} elderly sisters. They had-a well-kept ‘chen garden and a poultry. yard om the ‘k, and supported themselves by selling fron the products. POPULAR MECHANICS 923 Painter Wearing Mask While Spraying; Note the Line Connected to Main Supply Pipe AIRLINE FROM PAINT SPRAYER SUPPLIES WORKER’S MASK Extra protection is afforded against the danger of inhaling poison funtes while spraying paint in a mask that utilizes air pressure from the line to the paint nozzle. A length of braided tubing leads from a valve on the main supply line to the mouthpiece so that a current of air is con- stantly available to the wearer without ex- posure to the fume-laden atmosphere. The mask is easily adjusted and the valve can be regulated to suit the operator. VALVE GRINDER THAT FITS HAND EASES MECHANIC’S WORK Reconditioning the auto valves is simplified by a grinder that is shaped to fit the mechanic’s hand, so that he can ob- | tain a strong grip and work with greater accuracy and increased comfort, instead of having merely a knob at the top or an awkward, cumbersome tool to grasp. There are no parts to get out of order.

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POPULAR MECHANICS Listening-in & Anti- Aircraft Signal Towers OE os T bi PROPOSED UNDERGROUND WORKS Sectional View of Underground City, Proposed by R ussian Architects as Protection against Bombs and Gas; Note the Above-Ground Building with Sloping Walls and Multiple Roofs Bomb and Gas-Proof Cities of Future Russians Plan Weird Avchinetture: to Seve Civilian Population against Possible Attack by Fleets of Giant Air Raiders may have to £O back to their cave- awe part of their ey? a und; lling ancestors and lives unde e cities to be -lying by may have in low buildings, over vast areas, broken up parks and open spaces, if the threatened horrors of aerial warfare really materialize. Those are the conclusions reached by soviet officials in Moscow, who are busy at work planning a gas and bomb-proof city capable of resisting attack from the air. The soviet architects featured a re- cent anti-war “Scare Week” with plans for such a city. The plans called for vast subterranean cities, covered by reinforced- concrete roofs, under ways which in turn were buried many feet of sod and earth. Rail- and stt as well sidewalks, would also be placed underground. Such buildings as would be permitted above ground would to eets, as be limited four large daodaavel ized ae spread, height. The outer walls to offer the smallest possible tat stories wou taper, from above, mounted roofs, with honeycomb to take up the shock explor bomb. The roof similar to blister plan used as a submarine dete for warships, an outer shell ploding the torpedo on contact, inner taking up the the main hull is reached. explode on contact, would offer even would be reinforced-concr: and they by triple air ot is spaces betw an idea yr blister and shock bei Not all bor but the triple r to and explode the building space sufficient resistance penetration type before the interior of be reached. Every outlet and gas-proof, and would be tected against poison gas by double a cou including be to the air, windows, would while the rooms doors renderé underground 1D pi p! doo! sages refuge ld ——————E .

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POPULAR MECHANICS | PS OT es ? f Night in the City of the Future, as Russian Designers Imagine It; the Civilian Population Finds Refuge be- hind Gas-Tight Doors Underground, While Bombs Rain on Broad Parks and Dissipate Their Force without Harm; Only Searchlight and Listening Posts and Battery Positions Are Manned above Ground

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POPULAR MECHANICS a ton or more of bom] PROPOSED Dome-shaped roof of far as 250 miles, drop “ARMOURED Reinforced Concrete and still have sufficient BUILDINGS to return to their bas: Siar y Protective fleet of a hundred a vo mal ee ee o! ah ndt ed ~P bombers, dropping a hu: tons of explosives, co wipe out a large part Av mt a, “> city, or, if the bombs DE) eee loaded with lethal UUtreiee . . Ventilat ion Shelte “Cincrere™” 4, \¢ | a F i Aj Construction Details of the Proposed Rus- sian Type of Bomb and Gas-Proof Build- ings and Underground Shelters elaborate ventilating systems and power- ful exhaust fans which could sweep a | Seay ee strong current of air across all openings . ’ Ti ety ooo to form an invisible barrier that would | Vy! ‘ ompressed-Air brush gas fumes away. : f “a ., eyfinders Above ground, the occasional four-story building would be set in the midst of wide- spreading parks, which would cover the labyrinth of cave dwellings deep beneath the surface. Ocvasional listening and spread a curtain of death over a vast at ignal towers and platforms for anti-air- A 225 to 525-pound bomb would demo craft guns would be interspersed among a big building, and the larger sizes, wei 5 the scattered houses. ing from 1,640 to 3,280 pounds, as wu (Another idea advanced by the Russians in bombing tests, would each wipe out is the building of powerful gas neutral- entire city block. izers, which would draw the gas-laden air Lord Halsbury, former assistant through water spray and chemicals and — spector of high explosives in the Brit release it as pure air again. ministry of munitions, writing in the Lo: The possibility of horrors in the next don Daily Mail, recently said: ir beyond anything hitherto dreamed of “In a war of any magnitude there is being given consideration throughout not merely be armies engaging armi¢ Europe, especially in Russia, Germany and but whole nations mobilized against n England. A German magazine, Die tions. It inevitably follows that the o! Woche, recently pointed out that in the demarcation between the military fore: next war a city such as New York, with and civilian population will cease to exi its tremendously tall buildings and enor- The first conclusion that emerges is th mous concentration of millions of defense- an attack will be made upon the civilia: less people in a restricted area, would be population. From the dislike of facing “a giant with feet of clay. a veritable man unpleasant truths, an answer comes read trap.” Bombing planes, the writer pointed’ ily to many. ‘London,’ it is said, ‘w: out, have risen two miles into the air car- bombed during the war, and not muc! rying a load of six and a half tons of damage was done after all.’ The answet bombs, besides the weight of the crew and omits one very serious consideration their supplies. Modern bombers can carry London was attacked with incendiary

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POPULAR MECHANICS plosive bombs. Since then have been made in chemical war- he only other answer that may le is that it would be impossible sufficient Some two years pointed out that, in the vital tri- neluding the Thames docks and im junction, 2,000 tons of gas would a lethal atmosphere over all that » a height of forty feet.” great gas. TIRE HEATER FOR LOCOMOTIVES SIMPLIFIES REPAIRS en the big tires on the driving wheels ocomotive become worn enough to e replacement, it is necessary to re- them by expanding with a heater. iproved unit for this work has re- been. devised by a Pennsylvania sad employe. While similar to others, iid to eliminate the danger of burn- irnish off the engine-wheel centers, and cab, thoroughly heats the tire out twelve minutes and is used in ng new tires on the wheel. It is so ged that ignited gas from preheated ikes a blazing ring around the wheel pt six inches at the bottom. STATUE OF COW ADVERTISES CITY CREAMERY tatues of a cow were placed at several ities near Los Angeles, recently, to ertise a local creamery. The first figure prepared from a live model, the artist eping the cow near his studio. Art for Advertising; Statues of Cow and Dairy Maid along California Highways Celebrate Creamery Package Tier in Operation; String Is Easily Passed over Entire Bundle and Machine Is Movable PORTABLE PACKAGE TIER SAVES TIME AND EXPENSE For manufacturing plants producing merchandise in boxes, a package tier, re- cently introduced, can tie 45,000 boxes a day in approximately 2,500 bundles with but one operator required. It is said to wrap the twine about the parcel at tension, preventing cutting o1 the boxes, ner cards. even damaging and eliminates the need of cor- Little skill is necessary to op- erate the unit, and it can be moved about to any convenient place in the shop. PLAN TO DYE CAVALRY HORSES TO COMBAT AIR ATTACKS Dyed horses and saddles are under consideration at the cavalry school at Fort Riley, Kans., as a means of tecting mounted units against airplane attacks. It has been sug- gested that a “flock” formation be adopted to keep the men scattered and so decrease “shineless” pro- low-flving also the likelihood of heavy casualties in case of assault from the air. Tests have shown that the glint of the polished saddle-seat leather is easily visible to observers in the planes.

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POPULAR MECHANICS Bowlders in Stream Bed to Prevent Water Banks by Breaking Force of Flow ARTIFICIAL BOWLDERS IN RIVER PROTECT BED FROM WEAR A western irrigation district has found that river or creek beds, usually from subjected to un- high velocities, can be protected erosion by scattering artificial con- crete bowlders irregularly over the channel bottom. Those shown in the illustration proved effective where velocities were as high as thirty feet a second, and were made to contain two cubic yards of concrete. VILLAGE SMITHY STILL HERE DESPITE AUTOMOBILE That the of the motor has. not completely displaced the clang of the anvil was shown at a “cough” convention in Jersey City recently, when it was an- nounced that there are 70,000 blacksmiths in the United States today and prediction was made that the number would increase. In New York city alone, there are 65,000 horses, enough to keep many smiths’ fires ’ burning, and horseshoers’ wise men of the craft have fitted their shops to do automobile repair work so that cars have contributed to their business instead of diminishing it. from Tearing Out RABBIT FUR GIVEN MANY NAMES According to D C. Mills, rector ot gener the nat association of the industry, at least enty-five names to pelts in efforts to the product more pealing to the Among are “Russian Leopa “Moline,” “Nutriett “French Sable” “Visionette.” The is disguised by the s ful use of special d been given chasers. 1 POLICEMEN CARRY TRAFFIC SIGNS ON BACK Bottom and Traffic in Singapore-~ cart police rattan signs with red disks at each end direct autos. The disks reflect the light « approaching cars so that the drivers « easily see if the signal is set against ther To indicate a change in traffic, the pol Singapore Policeman with His Lighted Rattan “Arm That Helps Him Direct Traffic man has but to turn the signal through a1 angle of forty-five degrees.

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POPULAR MECHANICS 929 © SCRETS OF BIRDS’ FLIGHT SOUGHT BY SCIENCE Close View of the Flight- % Recording Apparatus; j Drawing to Show How It Is Adjusted to the Bird, and Reproduction of the Record Made SS REE . a . % — " cassette SE” # Je Sais 1 ile the secrets of a bird’s flight are the rate of six to eight t es i econd a ' et wholly solved, with an apparatus the beginning, sufficient to sustain four | by two French scientists, accu- times its own weight. \ complete re measurements have been made as to port” of a pigeon’s performance from the mount of flying energy expended, the time it was started until it returned to it ber of wing beats, speed, and other loft has been made with the unit. One tors, Che bird registers its own record of the interest ng facts revealed is that a fight on the instrument, which is bird flies on an almost negligible expend- entially a small revolving drum actu-_ iture of energy because it takes advantage through a system of levers and of both natural air current nd those pped to the bird’s back in such a way created by itself for support and motion wings, feet, neck and tail are leit he problem is: To what extent can these ( Che drum makes a revolution every forces be applied to future flying n seconds, starts automatically when the chines? Experts do not hesitate to state 1 is released, and shows the flight that means of making such application ord as a wavering line on the drum. soon will be found and among them are e curves illustrated here represent the some who even presage from the experi ht of a pigeon. They show that the ments the realization of man flight by hi d started slowly and beat its wings at own muscular power.

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© TONE The Gales Blow So Hard That the Icicles, Clinging to Life Lines and big Rails, Stick Out at Weird Angles By EDWARD BERNARD \ RACE with death and disaster, with + $150.000.000 as a si j a side bet, is run every Great Lakes, in year on the waters of t several hundred the effort of vessels to make “just one more trip.” Ships of the lakes that sail ‘id waters during the calms of spring through plac and summer, become places of fear when the order comes for that one last Captains, an accident trip. ever watchful, knowing that wrecked ambitions, means pend sleepless nig 1 } i its and foodless day when the time of year comes for the one extra vovage, the last of the year’s cargoes. Insurance companies will not take a last trips may make their bets with the Storm King each vear if they 30, the They refuse to 000,000 in chance on the Owners ll, but after midnight, Nov. declare hands _ off. Last vear $150,- underwriters wager. remained ships and cargoes locked Soo. in the ice neat “One more trip,” de Capt. Albert J. Mah the steamship “John J lum” as he pulled out luth Chicago-bound. with a cargo otf Three hours later he { the worst gale of his lakes. none of take lake re years on the that thousands ure every waves who trips to year have swept the vessel. Ice for everywhere climbing ever and ofi into the wil house were forced to cut tunnel through to the d “Guess we'll have to over roll ove said the captain, as he the order that 2U05-toot before we swung freighte right angle to her cour point off land. Lake rolled by Copper Mine Point, wi hours of the M ichipocotet Down the shore of Superior the time when another tripper” had gone ashore. This was the steamship “Cottonwo ashore. No more des: found in the Suffering Her crew got could be entire -ountry. spot from exposure ack of food, volunteers chose to risk ( 1 i lake in a small boat to bring relief to t!} Those on shore waited throu a long night, fires being kept burning ward off hungry fellows. wolves heard near miserable camp. Neither ship less, was equipped with wi Mahon, and the “John nothing of the “Cott wood” disaster until hours later. Tacking back and forth greatest of the lakes, the steamship act: as did the sailing vessels of years ago at said Capt. Barlum” knew across tl

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f a Big Grain Carrier Working to Chop a Lane in the St. Lawrence 5! 50 TI Ram Short Run, So That She Could uch saved the $1,000,000 ind her $1,000,000 cargo of ore. Mahon he window of the wheelhouse, staring navigation rty-three hours Capt. stood Once he lunched on sand- hes and tea, ke the galley. aft hours the gale. never once attempting to Men forward dared not Many than attempt over a wave-swept deck. Lake Mic ture for meals. went hun- for rather pas- Down higan, the storm ued and when the big vessel nosed her down the Calumet river to the docks the Wisconsin steel company, all hoped it the last trip of the year had been de con- Ashland for cargo of ore.” came the p order the wire. who had weathered the the year were again off on 1 ) pJ- over Captain and vorst storm “one more Out on Lake Michigan that night, teaming along in ballast, the captain soon to Give the the Ice Pack and Split It Apart learned that the el Sti 112 < tain ements ht north t other gale, the each hour, bringing anot]l for the skipper Lights ashore ot homes, gay dinners in Aboard the “John J. Barl trast! Inthe P. J. McCarthy, first mate, got t hrough tl story snug Chicago apartment wl eelhouse tne Cal on her course and t discussed the fury of the gal 1 and the possibility of the one bre At the Soo warnings were out and when the “John J. Barlum” passed Whitefish Point, headed due north i anchored behind the shel During the day the captain told of dis- asters th: 7 ] ’ ships were veive } ter. it came upon ships ot that ventured one last trip. “Caribou island, to the port,” ‘ ‘was sad wreck. of the scene of a mous Minch family Cleveland

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POPULAR MECHANICS With Hold Full of Automobiles and Hundreds Lashed to Her Decks, “‘The City of Bangor’? Was Driver Ashore in Lake Superior by a Winter Gale; Note the Ice-Covered Cars what was then the largest steel vessel on the lakes. Five members of the family came along with the captain on what actually proved to be the ship’s last trip. During the night, the steward started forward to bring some food to the owners. Amidships he saw a great crack in the vessel—she was breaking in two. Only time enough remained for him to grab a life preserver and sound a warning. But, it came too late. All were lost, except the steward. He was picked up twenty-four hours later.” The year 1926 will go down in history as the vear of the big winds on the lake, declared the captain. “Worse than 1913,” he maintained. “That was the year of the many wrecks—the ‘Charles S. Price,’ ‘Isaac M. Scott,’ ‘Henry B. Smith,’ ‘John A. Me- Gean,’ the ‘Argus,’ ‘Hydrus,’ ‘James Car- ruthers,’ ‘Waxford,’ ‘Leafield,’ all gone. “It was along here, probably further back near Whitefish Point, that the ‘Orin- oco’ and her tow were wrecked two years ago. The towline was cut and the captain ordered the crew of twenty off in boats. He was Capt. Lawrence—a fine fellow— and, with the chief engineer, Joseph Wurtz, and wheelman Hugh Gordon, re- mained on board. All three were lost. ‘Regina,’ Twenty hours later the crew made Mont real island, two of them having died fri exposure. “O, I tell you, sailing at this time of t! year is no pleasure business.” Officer McCarthy was on duty when t first blizzard on the trip north was « countered. One could see it miles aw and the ship rushed into a dense wall gloom—one minute sunshine, the ne darkness. Immediately the whistle start its fog warning and just in time. O of the darkness appeared another ship A man on the bridge with a megapho: meant a message. It was caught as t two vessels rushed by. “Five inches ice in Ashland harbor,” the voice said. The next day, after another sleepl night for the skipper, Apostle islan: were sighted. “Too bad we can’t see | Royal, way over there to the port,” sai Capt. Mahon. “It’s the scene of the lak: worst disaster. It’s where the ‘Algom was sunk with more than 200 aboard. “Funny thing, too, about the ‘Algom: wreck. Years ago I had a wheelman, wh: despite his 35 years, was white-headed. liked him very much. Once when pass ing Isle Royal I remarked about it beins the scene of the wreck. turned to me and said, The wheelmat ‘yes, captain, |

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T} POPULAR man at the wheel in that wreck.’ mature white hairs were explained.” 505-foot freighter in the solid of five-inch med just one of the many incidents “Tohn J. Barlum’s” trip. <A o assist. ng a hrough a sheet tug go in stern first,” said the cap- “Tce will form during the night and want to chance the rudder.” night the worked tirelessly. ifter they were filled with ore, must crew Each hatch must be covered no ered. invas mall job when the can Winter came to Ash- hand ears But, throughout it frozen stiff. ly and were frozen, all came the tunes of the “John J. Barlum” ditty only knew there are men in the crew Amhersthe Har hip .‘J next morning the “Barlum” cut a] inches of ice when White ] | I instead of five 1} came a nor’ wester and, eat ae ead, tne gaie registered hour. ahead of us coming down tl forward men stay ed not daring to cross the MECHANICS decks for t declared t “You were the heir meals,” } le captain. see, heavy seas breaking and the life thickness make it of the claring he rather over decks ice about line to such formed as to useless. One de- men, would drown than starve, made a dash for | But, he was caught amidshiy lis dinner, and went overboard Of body recovered talk, this! thi tell, completely coy course his Was never Cheerful Spray, by freezing as it 1 the decks with a coat- ot ce. rue, it ing had been the means of decking the steams! he yli- , Captain Mahon of fringing the John J. Bar! in |] lanksgiving ttire les with pearl polishing the deck lace. Chroughout the tinued, Phroughout the roared on. | leading into trom the ( ilm, misbehay 1.1 1 lake VeSSEIS. eyes and imagine Lake Superior,” 1 qe

of the urr

i¢€ Steamer “John J. Barlum,”’ Caught in the Ice of the St Marie, on Her Last Trip of the Year up the Lakes for a Final Cargo Marys River, below the Locks at Sault Ste.

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POPULAR MECHANICS the ship plunged on toward the rosy glow For insurance ceases. Owners may that indicated Detroit. a chance. Crews may ship aboard ve Lake Erie meant more wind and Cleve- in the danger season. Skippers may land was welcomed by captain and crew. low orders that mean sleepless night “Do we tie up here?” the question was’ double’ worries. Sut, insurance asked of man to his officer, the officer to panies say, “nothing doing.” the captain. Once again started, the “John J. Bar The owner answered. It was an order began her last trip. Through gales to make “one more trip.” This time to fogs she gamely fought her way into Chicago with a cargo of coal. St. Marys river, where with more Midnight of November 30 had passed 100 of her kind, she succumbed for a and when on the first day of December to the onslaught of winter. For days er “ the “John J. Barlum” started on her “one men stayed aboard, waiting for the lal last trip” she contributed to the annual jing tugs to clear a passage. None d $150,000,000 bet made by lake ship owners. leave the boat to make shore, for lake ice was treacherous. One man tempted it from another vessel and life was the forfeit. Then the day came when passage cleared. The “John J.” headed for | cago. One of the winners in the $1 000,000 bet, she berthed into a snug ha and when the orders came to “tie up the winter,” the “John J. Barlum” made her “one last trip.” Less fortunate was the freighter City of Bangor.” With holds and cd loaded with a consignment of autor biles from Detroit en route to Dulut she was driven ashore near Keween Point in the Upper Peninsula of Mic! Ice-Breaking Tug Opening a Road for the Ore and Grain Carriers, Top, and Part of the Ice-Bound Fleet in the St. Marys Waiting Their Turns to Be Released

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POPULAR MECHANICS 1 Side by Side, Five of the Low-Lying Ships, Each with Its for the River Passage to Be Opened for the Dash here she remained where help could ich her and slowly she became ice- ed, which was all that saved her from dashed to pieces. constant watch had been kept on the ship but it was finally decided ill efforts to salvage the boat itself useless, so the insurance undet i] of t] turned to the salvaging hundred l Pwo automobiles is let Lake Superi rT re ket s were given task of task not an removing the cars. The easy one, requiring the build of a road for distance of several through a heavily timbered country hore before any communication could northern Michigan established with ns not isolated by snow. the cars were stored hoisted he majority of low the ck and tackle to the improvised ice decks and were with ad leading to shore. Those on deck ere ice-incrusted and were pried from eir firm footing by jets of steam. ELECTRIC SAW FOR BUTCHERS SAVES TIME AND WORK shaft an electrically the circular attached to operated Swung from a eiling, iw for butchers is adapted to a wide va- riety of work, saves time and effort and “,en or Twelve Thousand Tons of Ore, to Safety requires practically no occasional The ranged that the current is attention except an oiling. outfit is so at automatically shut off when the saw is released, prevent turned on 1 ing waste, and is simply by lowering the blade into working position The saw is so balanced that the blade is raised out of the way, so that it cannot injure the operator, at the same time he lets go of the handle. Power is supplied through a Cutting Meat with the Elec tric Saw; It Is Suspended from the Ceiling for Easy Ma- nipulation and Swings Out of Way When Not in Use

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936 POPULAR MECHANICS FROM STAGECOACH TO THE LATEST EXPRESS PLANE Posing to Show How Trans- portation Changed; the Pays Homage to Methods Have Stagecoach the Air- plane as a Passenger and Express Carrier What The changes in may of the that travel by air would be common in a will be the next mode of travel? question answered, but the past justify that fanciful, for who, in the days cannot be replies seem have beliey ed stagecoach, would few decades? Old and modern methods of transportation were illustrated recently in Chicago when a stagecoach was drawn alongside an express and passenger air- plane for the Chicago-Dallas service. AUTO LIGHT IS SELF-DIMMING AND PENETRATES FOG Fifteen per cent ee more light on the road a ay and increased penetration are claimed for an automobile head- lamp bulb that dims itself with- ahead greatly tog out attention from the driver. To ap- proaching motorists it less bright and almost vanishes at closer appears to grow range, due to the special design of bulb, although it affords the operator constant illumination ahead. The unit fit any type of automobile lamp. SCOTLAND YARD ENLISTS RADIO TO HELP CATCH THIEVES Scotland Yard’s recently organized rad squad has been doing effective work wit! sets by which established units touring the city districts and the cen tral office. specially designed quic] ] b communication is betwee! The detail has proved espe cially useful in frustrating automobile thefts. In a recent three-month period only one attempt at auto stealing out ot 100 was successful. When riots threatened during the Sacco-Vanzetti dis turbances, a squad of detectives in a motor were car heard that a march was proposed on Buckingham palace. The squad imme diately radioed the word to Scotland Yard and, before the procession could get under way, 500 police, mounted and on foot, were in readiness to disperse the demon strators. A window-smashing gang had planned to steal a quantity of diamonds

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y POPULAR MECHANICS

iyed in Cartier’s us shop in Bond The Yard heard plot, within a few the unded by detectives when the thieves up in their luxu- automobile with ffeur attending, they promptly arrested. catch was made ten after Scotland | had been tipped off. nts store was ites MBERING AIDED AMPHIBIAN TUG imber companies in irio, Can., are utiliz- land-going tug in cts where booms of have to be towed on and rivers to the The craft is scow- ed and driven by two ellers the It can pull itself when in

fastream and travel the body of water where country to is work for it to do. This is accom- ed by means of a steel cable, anchored tT ee or other solid object and wound nadrum onthetug. Portages of five ten miles are often made by these craft, built the iron-shod and fitted on runner;rs. are solidly m with oak

and Bureau of Mines Motion-Picture Studio, Showing One of the Big Lights for Filming Interiors ROMANCES OF INDUSTRY TOLD IN MOVIE LIBRARY More the romantic than sixty sub} task of underground are nowo0e8n pir

<i One of ng units is a huge | what airplane-landing Fifty t appal aius are ‘unks of lighting employed. In filming the “Story of many of the

Can Travel on Land as Well as in Water; Lumbering Tug Which Propels Itself between Streams reels below were taken 8,000 feet the surface » i

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POPULAR MECHANICS “COLLARS” SPEED PLANT GROWTH Swiss gardener credited with the duction of a simple that is said to stimu the development of se and plants, resulting quicker germination better products. It simply a disk-shaped lar which is placed the seed or the plant attract and retain the | of the sun, acting sort of miniature house. There is a in the center and the is shaped to convey toward the middle so 1 the plant receives tional benefit from ers, and evaporatio ] reduced bec iuse ot coverings Che weedin: plified 1°1...1°1 , ikelihood the plant, ~ wths do1 , the In the Dining Room of the Ahwahnee Hotel in the Yosemite; the Huge Win- th low Makes a Frame for the Distant Falls HIGH WINDOW FRAMES FALLS | o pl , IN YOSEMITE HOTEL usual size when protected and tobacco and cotton marked development rhe t for five years, it is claimed. not huge moving to the novel decor: building 1s m: ] _ +1 down from the scheme of the exterior follows the tones of the pine needles and valley sides, Indian and Spanish intluences are out in various parts of the hotel. Of special interest is the men’s lounge, which has’ been decorated to suggest early days in California w red-and-blue checkered Plants Wearing Their ‘“Collars’’; These Units Attract curtains like miner's shirt. oil lamps. Sunshine and Help Retain Moisture buffalo and black-bear skins on the floor and other mementos of the gold-rush Q@About 100 tornadoes occur in the United period worked into the decorative scheme States every vear

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POPULAR MECHANICS The Tricks of the Ghost Hunters How Fake Spirit Manifestations, Which Often Deceive Even the Most Skeptical, Are Produced By WALTER B. GIBSON establish lany years endeavored to tain psychic phenomena as genuine, lares that “ninety-eight per cent of physical phenomena are fraudulently pn | me eee Carrington, who has for luced.”’ he purpose of this article is to give an eht.into the methods by which fake it manifestations are performed, and slate is made in four sec how that the means emploved by 1 slates is constructed so that tl j F bl When the end iudulent mediums are like those used ‘nd is removable. f ese magicians. The important distinction in the fact that the magician’s work medium justifiable, as he claims no supernormal rface of that ver, whereas the fraudulent seance is lat ma thing more than a swindle. Spirit slate writing, or the production on blank slates, has been per- late writing with a single sl ’ 1 in ] placed blank on both sides, and is paper bag. When the slate is withdrawn, a message is found upon it. In thi on the slate messages ormed for many years and still flourishes. ome of the methods used today are re- arkable for their ingenuity. Take, for imple, the bolted slates. Two slates shown to contain no writing, and the writing is already but 1 concealed beneath a laver of thick black light cardboard, which re are paper or very pears to be the suriace of the slate. Ited firmly together at all four corners.

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POPULAR MECHANICS medium is blindfolded, because, wit loose blind’cld, he can look down easily ana .cad the question in his lay Some mediums have methods whe: they can learn what the sitter has wt without exchanging slips at all. This be accomplished by the use of carl paper. If the sitter is given a pencil t contains hard lead, and is told to p his slip upon a piece of cardboard, medium may obtain a copy of the qu tion by having a sheet of carbon pape the cardboard, covered with a thin EVEN BOLTED *' of paper of the same color as the board SLATES MAY BE YY Another and more elaborate met! OPENED EASILY — , a ; : involves the use of a special table, w has a top covered by parchment or is taken from the bag, the paper leather. Under the table covering is dropped off and rematns in sheet of carbon paper and beneath 4 piece of thin white silk. The sitter writ lhe exchanging of slips of paper is one his question on a paper on the tal the most indetectible of all the tricks which, of course. is transcribed on fraudulent mediums, me whom silk. <A string runs down the table rely upon it alone. It is called the “billet switch,” and is performed in various ways. In one system, the original question is folded ind placed on the table so that 1 stands with the creased edge upward. The medium holds the dummy slip edgewise between the middle fingers « hand. He places the hand around tl 1 4: 1 1 original question, ane sh him along th i: ward dummy up with the same instant, his fingers bend in and press the original slip into the ] | hand. lo all appearances, the 1 has ’ : AN OLD MAGICIANS em TRICK IN SWITCHING merely picked up the original questi and MESSAGES !S OFTEN USE moved it to anothe and, when an assistant pulls the strir operator asks that ; uesti pe \ 1 the piece of silk goes through the flo ON a Sip of , Which must be ded. where the confederate reads the questio1 He picks up the slip, making the n, Then there is a form of pencil readi and presses the dummy question against that may be compared to lip reading. his forehead. He changes hands, w person skilled in this art can learn wh enables him to place the original question another person is writing, without seet in his lap, and quietly unfold it the paper, or being close enough to rea Chen, looking slyly downward, he reads the written words. The medium stan the original question and starts to answer at a distance and carefully watches the to} it. He folds the original slip, and when — of the writer's pencil. The movements he has answered the question, he drops the pencil indicate the letters which are the dummy on the table. He picks it up being written, and a keen observer cat immediately, making the switch once identify many words in this manner. Thi more, and hands the original slip back to system is generally used only when the the writer Strangely enough, this test sitter is told to write the name of a de often works more smoothly when the parted friend, from whom he or sh

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POPULAR MECHANICS a message. The medium can often either the first name or the full by watching the top of the pencil. en a medium insists that a question tten, that, in itself, is an indication kery. All sorts of pretexts have riven why the sitter or spectator write a question, for instance, to entrate his thoughts,” to “check up jirit answer,” or some such reason. theless, when a medium insists that ons be written, it is a sure sign that she has some method of learning is being written. Jed-letter reading has been employed elf-styled mediums for many years. ld reliable method depends upon a re soaked in alcohol. When the face n envelope is rubbed with the sponge, iper becomes transparent, and the um can read the question inside. But method has been broadly exposed. form of sealed-letter read- n which the medium holds up an en- pe, and answers a question written by Then he tears open the ype, and reads off the confederate’s tion aloud, but at the same time reads riting which is actually on the ques- which he holds in his hand. Thus he ns somebody's question. He holds up her envelope, and answers the ques- which he has just learned. envelope and reads aloud the ques- which he has just learned, at the same » reading the new question to himself. ete is a nfederate. He opens ALCOHOL REVEALS THE SECRET MESSAGE IN A SEALED ENVELOPE YJ \F_ THE MEDIUM hex RINGS IT'S GOOD SIGN OF TRICKERY, AS SHOWN ONE OF THE SIMPLEST OF MEDIUM TRICKS, POINT BOTH FOREFINGERS AT THE SUBJECT AND THEN — ONLY USE TWO ‘FINGERS ON ONE HAND.LEAVING THE OTHER HAND FREE TO RING BELLS OR TAP SUBJECT'’S HEAD This is an old method; it can be per- formed as an impromptu trick with good effect, but most magicians think the trick is too well Nevertheless, it is used constantly by a known. medium whom the writer has seen in action, and this man performs it so artfully that the trick is never detected. As he finishes reading a question aloud, he holds the slip of paper so his audience can see it, certain and calmly says: “There is your question; you wrote it hastily, but that was all the same.” The person who wrote the question is far away to the medium is showing him a question writ- seated too observe that ten by someone else, and he takes the me- dium’s statement in good faith. In dark medium is bound, but still manages to produce cer- tain the principal trick the medium Many of these exposed, but seances, where the manifestations, the method whereby temporarily frees himself. tricks lies in have been new ones constantly replace them. Here is a method which is virtually unknown: each He slips one hand right holds the end of one chain, while another his left holds the end of the chain. Obviously, one person the medium’s hands; vet when the lights are turned out, some startling phenomena take place. The trick is The medium has two metal rings, with a chain attached. in each ring, and a his person on on second controls each of easily accomplished. The slips his left thumb into the ring which encircles his right wrist. medium simply

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942 TABLE TOPS ‘ MAY CONCEAL h CARBON PAPER AND TABLES OFTEN HAVE HOLLOW LEGS tC Then he removes his rig ht hand which is When he instantly his right hand back into its ring. free to do its appointed task. , I calls for the lights, he can slip In fact, : : , the operation is so quick that the medium can meet any emergency. A story is told of a fraudulent “trumpet medium,” who customarily freed his right hand trumpet and used it through which he 5 | to manipulate a talked. seance, the investigators insisted that the medium fill his mouth with w iter. the handicap, the voices talked through the trumpet. The medium accomplished this very artfully. Among his parapher nalia was a bell. As soon as the lights were out, he released his hand the bell and raised it to his mouth. and set the He trumpet posited the water in the bell, bell carefully between his knees. mani- finished, he o 1 trom the free to proceed with the and when he had filled his mouth with the w bell again. festations, ater There is a clever little trick which dem- onstrates how easily a hand may be freed without anyone knowing it. This can be The forefingers performed for one person only. oper- ator f his , + 7 1; tator’s eyelids. places tips of against the spe Feeling both fingers, the spectator knows that the operator's hands are occupied, and he ts greatly astonished when he feels a hand POPULAR MECHANICS tap him on the head or brush his shou The fingers, operator immediately removes and the spectator is free to around in an effort to came the spirit touch. discover whe As SOOT the spectator shuts his eves, to receive The method is interesting. tips of the operator's extended fingers operator merely extends the first fingers of one hand, placing one finge: on each of the sitter’s eyelids. This lea one of the operator’s hands free -for acti ‘The operator should have both hands ¢ together when he removes his fingers f1 the person’s eyelids. The trick is simple enough; but it is no simpler than numerous methods of rele that have been adopted by fraudulent diums, past and present. Simplicity the keynote of some of the most effect tricks, whether they are performed fa by magicians or untairly by takers. MOTOR SLED RUN BY COGWHEEL NINETEEN MILES AN HOUR Winter sport for the person who lik« drive a motor ts afforded in a sled int duced in Germany. It is propelled by cogwheel turned by a and one-| The wheel \ speed of nit teen miles an hour is attained on level su one horsepow er gasoline motor. also used for steering. 1 is in the right con On down grades faces when the snow tion. the drivewheel « be disconnected and the sled coasts Motor Sled with Engine; the Footrests Heated by Gases from tl! Latest Unit for Winter Sports additional feature is that the footrests ar heated by exhaust gases from the engine

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POPULAR MECHANICS 943 ‘TRON PHILIP” HELPS TRAIN GERMAN POLICE . 2 mm, ‘ ae he ia A — + — a Where German Policemen Keep Physically Fit; Outdoor Gymnasium at Which 100 Men Can Exercise at One Time and Perform a Wide Variety of Stunts One hundred men can exercise at the ‘time on an outdoor gymnasium unit lled for the Berlin, Germany, police It has horizontal bars, trapezes, ers, swinging rings and other attach- and is well fitted for individual or ip work. Stanchly constructed _of the gym has been named “Iron ip” by members of the department. TIDES IN SURFACE OF EARTH LIKE THOSE OF OCEAN Like the seas, the earth’s crust rises and in tides as a result of the attraction he sun and moon, Dr. Walter D. Lam- ert, scientist of the coast and geodetic sur- ey, asserts. These movements have never een measured because instruments for e task have not yet been devised and complicated computations are involved, but scholars have established the exist- ence of such movements beyond all rea- onable doubt, he declares. These earth tides are affected by the ocean tides, ac- cording to Dr. Lambert, who says that there is probably no place on earth so remote from the seas that the effect of the ocean tides is not registered in the similar movements of the world’s crust. It has been shown that the tides in the Atlantic have an appreciable effect at Williams Bay, Wis., about 800 miles away. STEEL GLOVE FOR BUTCHERS REDUCES HAND INJURIES Designed espe- lly for packing- house butchers, a Cla glove of steel mesh protects the hand that does not wield the knife. The guard is the inven- tion of a physician who was called upon to dress the injuries of men working in a large packing plant. As many as thirty cut hands daily led him to design the glove, which has proved ef- fective in preventing injuries of that kind and yet does not interfere with work.

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O44 POPULAR

TJ wate — | i . on maar he i) as T= he 7 er & Oe ¢ Due wr a ex Mid dd | ad

watAtea = 5 SI sil : i" <i ~ . = & \= | ns Fi i oy

MECHANICS COAL PULVERIZE CUTS STEAMERS’ FUEL COST Marked reduction the fuel costs on stea: is predicted with a sp¢ coal pulverizer for rine use. The outfit only crushes the fuel it into the with compre air, eliminating the n¢ sity of Since the powdered forces naces firing by | has greater heating ciency, there is an add besides saving in labor. advantage AIR JACK SPEEDS TRANSFER OF CAR WHEELS and labor saved at the Pennsy] yards in Chicago in dling car Time wheels wit! compressed-air jack. is placed in the cente the junction of tracks, one leading to

shop and the other to 1

Composite Photograph Which Produces eton of the New St. Louis Courthouse “X-RAY” PHOTO OF SKYSCRAPER SHOWS ITS STRUCTURE By means Of a composite MOLOLVTaAptIl, producing the eitect an ray, an! esti study has | ne peen $5,000,000 | he made courthouse in St. result was obtained by making a photograph of the steel work and printing it through another photo of the building itself as it appeared in a four-foot plaster 7 a oe | 5 | 7 7 model. The double exposure shows at a glance how much of the building is steel ; : and how much is stone and reveals other data concerning its construction. he courthouse is nearly 380 feet high has the rhe with the lines of the modern skyscraper in achieving the design. ’ and equivalent of thirty-three stories. architects combined classical lorms

X-Ray Effect, Showing Steel Skel- repair yards. As wheels come from cars, they are raised for easy transfer either track simply by depressing a pe lo lower them, another pedal is depre The top of the jack is shaped to keep axle from falling off

l Air-Operated Jack Which Raises Car Wheels So Th« Can Be Shifted to Different Tracks

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POPULAR MECHANICS 945 heels in Snow! Rotary Plow Cutting Its Way through Drifts up Pikes-Peak Motor Road; in Places Surveys Had to Be Made to Find the Hidden Highway FIGHTING SNOW ON PIKES PEAK save to be taken to prevent the water in SIMPLIFIED BY TRACTORS the tractor radiators from freezing. Drifts eighteen feet high are encountered in tors and rotary plows that cut their many places. lrifts and hurl the snow either side, have been successfully soil ies: ths ceenel Wattle ti. chdae the MODEL PLANE FLIES BACKWARD lin the a } al 3 ttle to clear h OR POISES IN AIR id up Pikes’ Peak. Where from I , five to forty days were once re fo demonstrate a helicopter plane he tor the work, it is now done in expects to finish i erviceable size, a ind with fewer men. The high California inventor has prepared a work ists and winds about the mountain, ing model with a one and one-quarter ling many “pockets” for the snow to horsepower motor to operate the blades i ulate, and, in places, the road is en- The model is said to fly straight up or rely obscured SO down, backward as t maps and sur- well as forward and are necessary can remain station- to guide the work- ary for a time while , | ° si : . Should their aloit. The large-size . machines stray from hip will have a e right course, juipment and men ght be tumbled \W ing spre id of thirtv-four feet and will be driven by a Own the Steep H00 horsepow eT eak. Because of motor ; . 4 e intense cold 7m altitudes of 13.000 y Coins d iting from et and more, about 700 B.C.. have ecial precaution Model Helicopter Plane Which Flies Up or Down and heen nnearthe at | weet! Can Remain Stationary for a Time in Air een uned .

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POPULAR An Exciting Game on the Indoor Diamond; the Ball Incline to Opposing Player at Swivel BASEBALL GAME PLAYED IN BOX LATEST INDOOR SPORT Devised originally for the amusement of disabled war veterans, ball an indoor base- game is becoming popular among others. It is said to afford some of the thrills of the real game, requires consid- erable skill and is interesting to the spec- tators as well as to the players. A tiny ball is rolled down an incline, the object being to have it hit the backstop and so score a strike on the opposing player, who is at bat with a tiny small stick adjusted to He to hit ball miniature bat, to hit, to P : 1 las } a swivel. endeavors the this homerun with Score a or other credit, according 1 the place where the ball lands. PAPER PRODUCT SETTLES DUST ON SWEDISH ROADS Use has been found in tor the by-products of the paper mills. It is sulphite lye, that heretofore has gone to waste, but Sweden one ot is now be- ing employed to sprinkle the roads for settling the dust. The material, which is mixed with other sub- for this purpose, also reduces maintenance costs stances on the roads and surface to increases their durability, according Keeping Track of reports. MECHANICS FOODS REPRESENT ONLY FRACTION OF SUN’S HEAT To release as muc ergy as is contains the sunlight capturs nually through the duction of plant foo would be necessat burn about 8,900 tim: much the world produces ina y scientists estimate. this huge total human race uses less 1 two-tenths of one according to Soyee Thom Human proces coal as of Is Rolled Down the a cent, John M. Arthur, of the Institute for plant research. dependent on the which the plant uses the sunlight to p: duce energy in the form of various fo of which each person 2,000 calories every day. ings are consumes ENGINE-LOCATION BOARD AIDS RAILROAD EFFICIENCY slerk, : Devised by an engine-house ¢ cation board tells at a glance where motives on the shops, in service, borrowed or for duty. division are, whether aval It saves consulting more « to metal-bound tags being placed on plicated records and is easy opel to indicate the status of the engines saves time and aids the locomotive patcher in making accurate reports quick assignments. the Railroad’s Engines: This Wall Chart Every Locomotive Can Be Found Shows Whe:

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POPULAR MECHANICS 9417 DV y and Thriving Although They Have Never Been on the Ground: Chickens on Roof Farm of Providence, R. Hotel; They Enjoy Plenty of Fresh Air and Sunshine CHICKEN FARM ON CITY ROOF and ot a beautiful shade. The wood SERVES BIG HOTEL successtully worked in a lathe and doe not easily fracture, so that waste is re- chickens shown in this illustration duced to a minimum. never seen the ground, and probably = ll, for t] ev have been raised on bw cae ee alien cal i Memes: Seat CLOCK STARTS UP THE FURNACE ng bs Pesebiinsioa R. . ‘ hey have ON COLD MORNINGS watering fountains, and dirt to Discomforts of arising on cold mornings h in, just as their country cousins to ctart the furnace fire are avoided with e, and seem to thrive on their elevated clock arrange > | . p —_— on. Besides making use of space ment that opens therwise 1c] acte ti ] therwise would go to waste, the plan ¥ 5 the drafts at any res the hotel fresh poultry and e;: ros. Cs) time specified It is ) ’ easily adjusted to 4} DWARF TREES ONE FOOT HIGH ==> 7-T Vs any type of fur : A { ‘tTIOT SUBSTITUTE FOR BRIAR y ett Se 4 4 ° ° ° P } oS ‘ ° -_ \ possible substitute for briar, in the } — ing a weight at a nufacture of pipes and other articles TT certain predetet reported to have been found in a pe- . mined time, to lift j liar wood that grows in Africa. The the dratts. his es sometimes have trunks four feet in al is done graduall meter but are not more than one foot NY to prevent damage eh. There are but two leaves to a tree, = to Castings | these attain a length of six feet anda _— clock is set like an alarm and eX readth of two feet. The roots are tough constructed for service in a dusty ce

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oF “ . * Harriet Hodgini, Circus, Shows Her Riding High School Horses a ont a a, TREE RC SEES TOT ST TRHE children of the modern circus family, the budding riders, aerialists and acrobats of the future, lead simple, sane and happy lives. 948 Twelve- Year-Old Daughter of the Skill Simple By EARL CHAPIN MAY These youngsters of the tights spangles and tented world come almost always, from circus st They are “born into the bu ness,’ to use a circus phrase and are raised as tenderly as sons or daughters of college pr fessors or merchant prince About the only difference be- tween the way they are brous up and the way the childre: “towners” or “gillipins” raised is that “trouper” child are taught the virtues and wards of discipline. Their | are circumscribed by dutie These little troupers learn | infancy to respect their pare: and their wishes or commat which sets them apart f1 most offspring of non-trou; stock. But they take a wh some delight in circus life. T! rejoice in it. Why shoul they? It’s one long life of cai ing out. Spring has come and wit a tented city grows up s morning on the grass-gri field that is your local ci grounds. If you are among hundreds of towners who early birds, you are in y railroad yards in time to see Nelson family descend the ste of a yellow Pullman car, wh is part of a long and hea, loaded circus train. Mother and father Nelson fit appear and are tollowed by sev: children ranging from Rosi aged thirty, to little Paul, in his fourteen year. As they walk or ride in taxi or trolle car from the train to circus grounds, you hardly guess that the motherly lookin

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in gingham dress and the kindly n plain gray suit are convoying a of the world’s most famous acro- You might not notice them at all. ly you would never recognize them ‘us people if you did not see them nnection with the gaudy train or tall te tents. ‘e on the lot, the younger ones may 1 bit. They may play leaptrog themselves. But they pay no at- nm to those who do not belong to raternity. Their own company sat- them. They hunger for just one ¢ more—breakfast in the cookhouse reus tent. As each Nelson enters ng canvas room, above which a small fying to indicate that food is being 1 | he ed, he pauses to purchase from t us steward a quart of milk for his own (his extra is ordered by the parent sons three times each day, for break- noon-day lunch or dinner and five- ock supper. Fruit, cereals, jam, id, butter and a little fish complete the ly menu. -etween breakfast and dinner the Nel- Visit with their circus friends, clean repair wardrobes and, occasionally, +1 ice some new trick. Then comes a The Cinderella Story, Starring a Circus Child, and Bertie Hod- ' gini Taking a ‘ Ballet Lesson ] session of lessons with mother Nelson as teacher This time may be devoted to mathematics, physics, chemistry or almost any subject except geography, tor, as the

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POPULAR MECHANICS can heat our private dressing tent think best.” Among the well-known circus f: are the Hobsons, riders of the first Mr. and Mrs. Homer Hobson, Sr like the Nelsons, been featured circus ring for more than forty year you'd never guess it unless the { chieftain told you so. Homer Hol Jr., and Herbert, his youngest br: have been trouping since infancy. I: of the Hobson riding acts, young H while clowning it, is dragged dace d ward around the ring clinging to th: of a galloping horse, whic! quently kicks cinders or gr into the clowning equest: mouth. I’ve seen the boy’ bleed many t but he thrive rough work of kind. You wo hardly recogni oS ae Nelsons have been traveling with some circus since infancy and in almost any year can show a mileage of at least 20,000, they have learned their geography from contact with many coun- tries in many climes. Like other troupers, they work twice each weekday, but, all told, are in the circus ring less than thirty minutes daily, including the matinee and night performance. Of course, there are thorns along the circus path. I’ve seen the Nelson girls, clad only in low bodices and silk tights, stand, unprotected from chilling rain, while awaiting their turns to enter the big top and do their stunts. But the weather did not bother them. “They've lived outdoors most of their lives,” the mother proclaims proudly. “They take a cold sponge bath every day. Of course, they get plenty of exercise, and all the food that’s good for them. There Madge Fuller as an Elephant Trainer, Georges Ca . : ; pentier with a Circus Daughter, and Bertie Hodg are plenty of blankets in their berths and | Trying a Clown Role

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POPULAR MECHANICS -faced, sturdy lad the buffoon who horse. The While one the touch ff’ a racing “finish” 7 is a difficult trick. mn the hindpart moving foot must the But the second toot must follow for of would be painful the or it bov. who works with lert CTL, Homer, Jr., ip as a girl, also doubles with the an Indian riding act. Indian “double” strong leaning toward stuff. in that nas - Vest Hobsons likes best, ‘al seasons, when not in school, racticed until Pp tricks, SO the does become ‘nt with that he spinning in the after-show mESTrE as @ r our plains, al- the H ob- ave long been of uct oO! residents ¢ ( ~ Sees . Fe aa ws - a q " e Two Hodgini Children in Some of Their Favorite aytime Stunts, Harriet as a Cowgirl and Bertie as Equestrienne and Clown Which ] } SHOWS ‘ one professional boy regal ds ci bully ing asa ye Performers Sells-Floto show vhich outside look 1925 was one in didn’t season of had on ‘J hey even it it big-top performance, give no part. because Ww: LS n in the yard by riders, acrobats, clowns, aer.alists. Act horses. Aeriali funny clow and hobby so-called contortionists came out on “took off” the Clowns made fun of the aerial uti set sts hundreds of Musici and laboring men, who paid their mone) 1 circus exec ves, iad the time of 1 see the mimic show, lives, and helped create a fund for former laid up in a hospital. and weddings are celebrated in t 1 often 1¢ i yard, and the clown bat own impromptu shows. The discipline which ple accept as the most rs in n ; a burlesque on the , back- juggler obats > , and the ills

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952 POPULAR MECHANICS the dailv life doesn’t spoil the fun for their ears. They are taught to tak: them. Although they must be through of themselves whenever possible their breakfast by nine o’clock and, on are not pampered or petted. But d smaller shows, be ready for parade when’ and out, the circus family is never the second bugle blows, at ten or there- rated. If the parents do not keep abouts, and must be through their dinner children in plain sight, they know ex and supper before the cookhouse flag falls, where those children are. because when that flag falls it means that The circus company is one great { meals are no longer being served; al- and some of its members are always though they must sleep in the same berths at hand. The young folks have no op each night, usually doubling up with some _ tunity to take long rides in motor ca: one of their sex; although they must sit themselves. Such rides as they tak: on the same hard plank in the same place tween the lot and circus train are i: at the same table at each meal; although company of other troupers. So all their circus and street wardrobe must parents do not wonder where Tom ort be in the same little square-topped trunk may be at night. The children are « in the same place, close to other trunks, in or near the lighted tents, on the in the dressing room each day, and every-_ to or in the circus train. thing must be packed and unpacked This sounds as though young methodically, and although they must lives were pretty limited. They are, never be late a second or disobey or ignore’ I’ve never heard a word of discont ( any order referring to their appearance in Sometimes Harriet Hodgini, from the ring, they lead a simple, easy life. wisdom of her twelfth year, will gru: Not only do they get plenty of fresh because she is not allowed another food and air and just enough exercise to cream cone. Sertie, her ten-year keep them hard and fit, they also are pro- brother, may look vainly at a lolly; tected by the traditions of the circus lot. But fatness is fatal in the circus busin: Even on the wettest days, when wind and unless one wants to be a sideshow f: weather are against all trouper folks and They are trained to restrain ther n l the canvasmen are struggling with hostile even when they are sorely tempted elements, rough language seldom meets _ circus steward. All Ready for the Grand Entry in the Opening Spectacle; the Circus Families Gather in Gorgeous Costumes, Ranging from Oriental Splendor to the White Paint of the Clowns

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POPULAR MECHANICS Fourth of July, at New Bedford, Harriet and Bertie sat through a which included sweet relish, Little cocktail, celery, young onions, rad- chicken gumbo soup, broiled salmon tartar sauce, young Vermont turkey oyster dressing and cranberry sauce, | Virginia ham and corn fritters, new oes in cream, green peas, combina- ilad, asparagus tips on toast, straw- shortcake, watermelon, ice cream, nuts and coffee. Yet Harriet and e did not sample half of it. Meats weets are seldom given them because are destined to follow their mother father in the ring. ev have been preparing for their ca- since babyhood. They are skillful riders gut they look long Some day they are going to rincipal riders. A principal rider is one stands, pirouettes and somersaults on rosined back of a loping steed. As steed goes round and round the ring the circus band plays its fastest tune, rider kisses his or her hand to the isands of applauding towners. now. ahead. HAND SPRAYER FOR LACQUERING SAVES USING BRUSH pecial nozzle adjustments in a hand the market said to pt the instrument to the successful ap- er now on are tion of lacquer to a wide variety of ices, resulting better job n could be done a brush and aving in time. taking care to ve the liquid of proper con- tency and hold- the spraver at angle of about rty-five degrees » the face of the or] and uns can be avoided, it is asserted. ol] J The is easily kept in order and, when not use, is held in an upright position so it the contents will not spill. spots @ The United States has one-third of the vorld’s telegraph lines. 953 CHANGE FRUIT OF WALNUT TREE BY GRAFTING OPERATION maniet amtiva? TT TALS Black-Walnut Tree Transformed into Bearer of the English Variety and Scaffold Used in Grafting Although walnuts for many years, a huge tree in California will produce the from has one of extensive grafting it has vielded black only English variety for it been altered by most now on, the ations on oper- record. Tree surgeons erected a huge scaffolding about the limbs in order to reach all parts of them. The tree more than 100 years old and, in a few sea- sons, it 1s expected to produce ton of English walnuts. AUTO TRUCK WHEEL OF RUBBER REDUCES TIRE EXPENSE Auto truck wheels made of compressed rubber been the disk and tire type resilient and noiseless. do have introduced to usual replace Chey are less damage to surfaces and may be obtained in varying degrees of hardness, depending upon the maximum load. Maintenance is low, as there are no punctures, retread- expected ing costs or breakages, and the wheels are unaffected by hot, cold or damp climates, it is asserted.

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SNY 210 AINE ’ rS SING WIN Men WNAHSIN WHIVS -NOISNIM STMASINGO) SINOi's a, ae SHOdWNWIONI NOL AWO SOND VI =~ OO. % OINOCINY WA + c ) YOLSNOH NuuShy, / HINOM ig V/A All) YWOHY ine AAI) YONOd / wathibenn SITFIONY $O OTFISM INVER OTe 4a SONIadS ¢ Uvx#0O 10 j 4IAN3IQ VHYHO ety) ad NYS WAW Id HLYON INN3AIHD ae 5 iNWe 1S S>SrlodvaNNiw ONY Use | ODS Wed FuULvgs = 7

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POPULAR MECHANICS R MAIL’S AMAZING GROWTH SETS AVIATION RECORD 1 the greatest air-mail. and aerial- s system in the world, the United has quietly taken the lead in self- rting commercial aviation, so quietly few people realize the extent of the ies in actual operation. While Euro- countries, with their government- lized air lines, are still ahead in pas- carrying, the United States is rap- forging to the front in this field, too, the mail lines built up by the post department have been turned over ivate operation. For a fare of $200, now possible to go from Chicago to Francisco by air in twenty hours, in- of three days by train, and shorter enger routes are in operation on many e other air lines. The elimination of iid zone system, with various rates for rent sections, has done much to pop- ze the air longer sary to study a map before sticking tamp on an air letter. The new rate en cents a half ounce, regardless of e the letter is going. Air letters do require an extra two-cent stamp, as mail, as it is no e case for special-delivery mail, the cents being the only charge. While ictual flying has been turned over to ite contractors, who furnish their own es and landing fields and carry the at a fixed price per pound, the gov- ment system of night-flying ts has been taken over by the depart- nt of commerce, and placed under the ithouse service, which guards ships at The lights e being extended on new mail routes, to rmit night flying, and eventually every rt of the country will have its blazing of beacons to mark the main air utes. The department also is devel- ng radio-compass beacons, and already installed the first one at the Belle- nte, Pa., field, the center of the worst ing zone in the country. While the do- beacon and ships over land now. estic air mail has been growing apace, e post office recently let a contract for third foreign mail route, a ninety-mile mp from Key West to Havana. Some kinds of goldenrod are cultivated garden flowers. “Running Sitting Down”; Barsi, Hungarian Athlete, Doing Road Work on the Leg Exerciser LEG EXERCISER KEEPS RUNNER IN TRIM FOR RACES To strengthen his leg muscles and keep in training for the races, Hun- garian middle-distance on a special exerciser. Barsi, a runner, practices It permits the op- erator to stand in approximate running position and manipulate pedals which turn weights to give the necessary resistance. The outfit is especially useful when the weather does not permit outdoor training. TIRE-CASING SPREADER HELPS PREVENT PUNCTURES Thorough examination of the inside of the auto-tire casing and removal of small articles, such as tacks points, and nail likely to cause puncture, can easily be ac- complished with a simply operated spreader the forces the sides of now on market. It the casing far apart, and the en- tire surface is ex- posed, by means and two disks, as the casing is rotated with a hand lever. of a corrugated roller

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956 POPULAR Placing the Refrigerating Unit in Cabinet, and Closer View, Showing the Two Balls and Cube Freezer ICE IS MADE WITH COOKSTOVE FOR REFRIGERATING Artificial refrigeration is now available even to homes that are not supplied with electricity in a recently introduced unit, operated on almost any kind of a stove It consists connected principally of two large balls, tube. A into by a peculiarly bent refrigerating liquid, introduced of the balls, is heated the other is submerged in a tub of water. The portion of the liquid which passes into the cold ball and one on the stove wniile heat evaporates a condenses. A small whistle warns when the heating has been continued long enough; the unit is then lifted off the fire, the hot ball submerged a few mo- ments in water and the outfit placed in the refrigerating cabinet. The liquid in the cold ball has started to evaporate and pass slowly back into the other chamber, the process chilling the cold ball to a temperature of zero or below, it is said. This action is continued and is said to maintain a cold, dry temperature for twenty-four to thirty-six hours, depend- ing upon the out atmosphere. An ice tray is supplied with the unit and is placed inside the cold ball for freezing cubes for salads, deserts or cooling liquids. MECHANICS CHANGE AUTO INTO FIRE ENGINE TO HELP SAVE FORESTS By the addition of high and low sure pumps, a small automobile has changed into an efficient fire engin fighting blazes in the California for It carries 500 feet of hose, tools and ot equipment and can hurl a two-and half-inch stream of water eighty feet, pressure of eighty pounds to the sq inch. The low-pressure pump is emplo in forcing water to the other from a siderable distance, a feature units that other auto have not had. TI important, for often the available sou of water is far from the fire. quickly the actual 0th pumps are portable taken from the any convenient place. scen auto The car with a variable-gear axle and, since it be turned within a short radius, it is e cially adapted to service on narrow, v ing mountain roads. near the highways, As many fires owing to careless of campers, it is believed that the unit will be especially effective in cu ing blazes betore they have Start. a danget In a recent test, the converted beat regular fire-fighting equipment t blaze and had water short time, although the supply was | a mile up the road. A ditch and the | pressure pump solved the problem. for use is fitt on the fire within »\ Pump in Action on Front of Auto, Which Has Converted into Fire Engine to Guard Forests @A five-speed outboard motor is bein built for small boats. Been

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POPULAR MECHANICS 957 Z2OTECTING THE SHORE ENDS OF LATEST CABLE leting the “Cable Handclasp”’ between England and Belgium; Placing the Shore End of the Special Coverings Have Been Used to Protect the Wires from Corrosion England and Bel- an iron handclasp across the Eng- link between hannel, has been completed recently. the British post-office cable, an in- ional bond that will mean better and communication these Muntries. new cable contains between Every vements designed to make it better its predecessors. If corrosion dam- cable, it is very expensive to fish he ends and repair them. of work le strong In fact, any would be difficult, because cur- in the English innel and the revalent ither. stormy The worst rrosion usually tion coating used does not alway such severe conditions, and cables with ordinary steel wire have failed quick- ly. So it was decided to use rust-resisting pure iron to cover this latest cable. AIR-MAIL LETTERS IDENTIFIED WITH LABEL TAPE For tended for the air mail, a special label tape a handy roll has been devised The ie easy identification of letters in- carried in ipe comes a continuous gummed on side, and the holder 18 designed to pre vent the edges from ces place on the ore ends of the ble because of de- mposed matter ir the surface of e water. Even he thick composi- curling up and tor removing the tape with a slight move ment of the thumb. Simple Means of Identifying the Letter for Air Mails Applying Tape from Holder

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POPULAR MECHANICS BATTLE MONUMENTS TO AMERICAN HEROES America’s Heroic Dead, Lying in the Fields of Europe, and the Scenes Where They Fought Are to Be Marked by Magnif icent Memorials, Some of Whic! Are Shown Here; Above Is the Simple Chapel for the Flanders Field Cemetery, at Warieghem, in Belgium The Chapel for the Cemetery at Sures- nes, and, Top, the Great Gothic Tower to Stand Guard over the Dead in the Aisne-Marne Ceme tery, Situated near Belleau Wood Se ea ‘ ge a nord + a > ‘ Bf & , fala | A Central Chanel with Clois- tered Wings, Above, Is to Be Built on the Meuse-Argonne Field at Sous-Montfaucon

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POPULAR MECHANICS MARK MAJOR ENGAGEMENTS IN FRANCE te i, 7 _@ BO rer ee 23 Eagles and Shields Are the At Left Is the Tall Column to Simple Ornaments for the St. ‘ Mark the Meuse-Argonne Bat- Mihiel Cemetery Chapel tle Site at Montfaucon A Circular Colonnade with Chanel Wings Has Been Planned by Gen. Pershing’s Monument Commission for the Oise-Aisne Cem- etery near Fere-en-Tardenois

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POPULAR MECHANICS Superstition and Modern Advertising Meet on Chinese Stone Elephant; Ming Tomb Figure Is Billboard and Shrine STONE ELEPHANT AS BILLBOARD SHOWS CHANGES IN CHINA That modern China is recognizing the importance of advertising, even to the ex- tent of trampling on the traditions of the past, is shown by the accompanying ill tration. The nationalists used a stone elephant near the Ming tombs as a us- have billboard on which to display posters urg- ing citizens to put down communism and attend the conterence. In striking contrast to this modern note nationalist-party are the stones on the back of the elephant. They were tossed there by women follow- ing an ancient superstition, signifying that, if the stone lodged on the monument, good luck would reward the thrower and her next child would be a boy, but if it fell off, a girl child would be born. GOLD IS BROUGHT BY PLANES FROM SIBERIAN FIELDS Gold is delivered in a few hours instead Aldan fields mines are railroad, but ym the rich of Siberia, by airplanes. several days’ of several days Che travel trom a the airplane has stimulated development. “PADDED CELL” FoR MACHINERY A huge flywheel is ning at terrific rate. is the sudden cras| hurtling metal, and side of the big wheel and is thro against the wall. <A: one standing in the | of the missile would | been killed or sever maimed, but the men \ have been lapses watching wheel are safely out peering through te scopes, and the concrete that guard the from the spinning g walls are nine feet thick. is a test chamber or “| ded cell,” an Engl electric company use trying out flywheels other machine parts jected to Fast camera lenses, at in the walls, record the results of the te which would be impossible were it for the safety room. high spee guarded openi HIGH-VOLTAGE TESTER GUARDS AGAINST ACCIDENTS Electrical workers handling inst tions involving currents of 1,000 volts more, are provided vith a tester in- tended to reveal parts of equip- ment still con- nected to the high voltage with a minimum of dan- ger and great cer- tainty. It consists chiefly of an indi- cator filled with neon gas which brightly when passes through it. glows electric curre! On voltages of 3,00 or more, it registers simply by being place in the electrostatic field, without with the wire. For use on parts difficu to reach, it is mounted on a pole. conta‘

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POPULAR MECHANICS Two Types of Meters That Register the Bumps in Cement Pavings, and, at Right, Illustration of the Familiar Straightedge for the Same Purpose ° —— METER THAT MEASURES BUMPS INSURES SMOOTHER ROADS determine the smoothness of con- roads, the bureau of standards has eloped a special measuring instrument an accurate record of the ps as it moves along the highway. The fit has each adjusted react to the irregularities on the sur- in such a way that the motion is trans writes sixteen wheels, ted to the delicate recording apparatus MAGIC METAL LIKE ALUMINUM TO IMPROVE AIRPLANES lum, or its alloys, rd i hip trames and automobile pistons a metal about aluminum and introduced in the near predict. The substance been known for a long time but, until ently, its production in quantities large to be industrially practical hi n impossible because of inadequate re- ng methods. ery ighter than much may be experts ugh iS In many ways, beryllium uited to the service of man. It offers h resistance to corrosion, is four times tic as aluminum and expands under fluence of heat at about the same iron. This property makes it peculiarly adapted to use in engine pis- tons. Some of the difficulties of the pres- ent types of light pistons arise from the fact that they expand at a different rate from that of the iron cylinders in which they are inclosed. rate as cast AUTO-PEDAL DEPRESSOR AIDS IN BRAKE ADJUSTMENTS The need of an extra man is eliminated making adjustments the brake, clutch and stop light with a de pressor for the pedal. in of auto’s It fits against the edge of the front seat and holds the pedal in a steady grip at unvarying pressure Brake Depressor Attached to the Pedal Showing How It Serves as a Helper in Making Adjustments

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(_ Where a IDIIN si \ PINT’S a pound the world around,” if says an old proverb, but the author of it had never heard of a star, which as- tronomers have weighed and measured, where a pint weighs twenty-five tons. The star is one part of the twin body which we know as Sirius, the dog star. It is so far away that it appears to the eye as a single star, but actually it is two bodies, revolving about a common center. The two stars* are of unequal size, the larger being thirty-three times brighter than our sun. The other isn’t much larger than the earth, but weighs as much as our sun, which is why the two bodies will volve about a point between them. If you imagine compressing such a of lead into a pint cup you can get so idea of the solidity of the matter which the small half of Sirius is compo What that material is, so far has defi analysis. If this material could be cla fied and then reproduced on earth, scie: vould have a new tool that would revo tionize our life. For one thing, suc! metal would make an almost perfect e! trical conductor. With it the power 7: = . Niagara could be wired around the wo: Seated in His Comfortable Armchair, This German Astronomer Views the Heavens through His Giant Tele- scope, Moving the Ponderous Mass at Will with the Controls behind Him 962

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Gaseous Nebula and, at the Right, the Huge Bright Disk of Orion; Our Sun, Earth and Planets Would Be Only a Sraall Bright Spot in This Enormous Nebula, Billions of Miles Away hout appreciable loss in the round trip. star is far too close to the tremen- heat of its big neighbor to support though its size, practically the same ur world, is sufficient to hold together t1 iosphere. That life exist in of the thousands of universes out- does ur own was the belief expressed re- in a lecture by Sir Oliver Lodge. only gave voice to the opinion held by ny astronomers, when he pointed out the distribution and arrangement of ter throughout the many worlds which can see is such as to be entirely suit- e tor the growth of life. think it the ex- habitations on ich life in its various grades may have eloped as it has on this earth,” said Oliver. “It seems absurd to suppose reasonable to infer ence of innumerable 1 t this earth is the erely because it is only habitable world the only one of which are certain. “What we find here is that life, vegeta ble and animal, wherever conditions allow. makes its appearance We may rea that the same sort o thing would happen elsewhere and that sonably suppose ther amid the hosts of world multitudes in which those condition whatever thev may be, are satisfied “The universe is a sort of law-abiding organism or organization, the parts of which are worlds. It affords evi design and planning There is great va riety, but nothing haphazard. It is rathe like looking at a workshop full of running machines. fhe machines appear _ self- working and complete, but they are full lesign to accomplish a cer- of evidence of « tain object. Is here, it 4 > opirect of ‘From what we know of detai is legitimate to surmise that the all worlds in tunity for life tnat the Space 1s to provide oppor- ] and and arrangement ot matter in the mind to develop 963

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POPULAR Many of Our Star Names Come Down from Ancient Folk Lore and Supersti- tion, That Ascribed Fan- ciful Forms to the Heav- enly Groups, as in the Old Drawing Above; Right, Druid Sun Wor- shipers Are Depicted at Their Orisons at Stone- henge in Ancient England universe is subsidi- ary to that impor- tant end.” The study in re- cent years of in- numerable far-dis- tant nebule, as the astronomers call them, has revealed that, far outside the farthest stars which we see part of our own universe, are thousands of as MECHANICS 5,000,000,000 miles acros takes light, traveling 186,000 miles a ond, or about 11,000,000 miles a mi: slightly over eight hours to traverse distance. Yet distant stars and nebu have been measured which are so far a that it takes a beam of light 11,000 ye to reach the earth, and there are ot still farther away. The hundred-inch telescope at Mt. \\ son observatory is capable of picking about 300,000,000 stars and nebule. latter include not only such near neighb as those 11,000 light years away, but, y beyond that, float a million more spi nebulz, whose distances are said to rat from 500,000-to | 000,000 light Some of the tant star cluster: which are visible | the naked eye quite well know: the Pleiades, for « ample. to almost is yea Sut to them at 11,000, miles a minute, t speed of light or take 325 years, a1 when arrive you would find the to about you be a 500 group \ stars, as, or bigg than, our sun. How the distan these big to stars vast groups, each forming a complete world in itself. Every solid nebula studied has presented exactly the same form—a cartwheel, thicker in the middle than at the edges. The most pow- erful telescope can photograph these neb- ulz only as blurs of light, though each is probably composed of millions of stars as large or larger than our sun. The distance to some of the nearest of these world groups almost defies the im- agination. Despite the immensity of our own solar system—the orbit of Neptune The Hindus in Olden Times Pictured the Hemisphere, Supported by Elephants Standing on Turtle’s Back a radio signal, would Earth as a a

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POPULAR MECHANICS os — se | e g Oo M OC s C rent Gas can SPO ~ S0ug Sun's mt na and tog Layers Which ee pad the Real Molten Sphere ch Showing How the Moon Casts a Small Shadow on Part of the Earth

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POPULAR MECHANICS base. Yet that was the _ proporti his angles, though his base line w earth’s orbit itself, a distance of 186,00) miles. After years of calculation, he ured that the star known as 61 Cyg1 the constellation of the Swan, was { trillion miles away. The use of the earth’s orbit as a line was a clever idea, but made the rather slow, for it was necessary to one observation and then wait six mont for the earth to reach the opposite of its orbit before making the second fact it was so slow, with the necessary culations, that only sixty stars had b fixed up to 1900. Then Yerkes observatory, at Willi Bay, Wis., und took to take « Shows. Seah, Widiea pares the task, usin of Photographs of a Num- photographic me ber of Stars. Taken at Fif- ; a a. . teen-Minute Intervals; the ; od. The idea Variations in _ Intensity as clever as Be Proved One Was Really ‘ 4 ’ a Double or Twin Star, , sel’s. If you fh the Two Revolving around : oa Sg n8 “ Each Other your pencil in f eeee eee. of your eyes measured is a mar- @eeceee% look at a pittur ealnhe ators of tone ®@ 88608 eeee8 the wall, and man ingenuity. close first one When the distance ' and then the ot! to the moon, a mat- . SeSe you will see that { ee apparent positior ter of some 250,000 miles, is measured, etee¢ ™. the pencil, in re observations from ° tion to the pictu two points as far ae ZA shifts from side apart, say, as eee j France and America, are sufficient. If a sight is taken from France and the angle measured, and a similar sight taken from America, it is as easy to calculate the point where the lines me the length of cot the base line between the two observa- tories being known—as it is for a surveyor to work out a similar problem in triangu- lation on an open prairie. For some of the close planets, the diameter of the earth itself is a sufficient base line, giving an- gles of sufficient size to be readily and ac- curately measured. But in 1838, when Bessel undertook the first measurement of the distance to a star, he was faced by an infinitely more complicated problem. Imagine construct- ing a triangle with a one-inch base and two sides eight miles long, and then try to The Familiar “Falling Star,” Really a Meteor, Som ; ; f - . A times Crosses an Astronomer’s Plate, Leaving a Pe measure the angle of the sides to the fectly Straight Mark

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POPULAR MECHANICS ents of an English College Helping Their Professor Place a Plate Holder on a Nineteen-Foot Camera to Photograph Recent Eclipse of the Sun, Visible Only Overseas The Yerkes astronomers used a_ ing they show no apparent change in po- star instead of a pencil and the dis- sition. Actually they are hurtling through star as a picture, and took photo- space at tremendous speed, but the dis- six months apart, on opposite sides tance to them is so great that their motion e earth's orbit. The result was that is not apparent. A passenger in an air- near star had shifted in its apparent plane high above the earth, speeding at tion to the distant one, and the seem- 100 miles an hour, does not feel that he hift could be measured and angles’ is going any faster than in an automobile distances calcuiated. In this way at a quarter of that speed, or less. The as much as 375 trillion miles away reason is that his view ranges so much e been accurately located. farther, and there is nothing near by to it, though, was about the limit of help him judge his speed. Similarly, the that method, so another had to be’ observer on the ground does not appre nd for stars still farther away. The ciate the great speed of the airplane be- and its planets are moving toward cause of its distance. Enlarge the plane a at the rate of twelve miles a second. to the size of a star, but move it a few twenty vears this movement gives a_ trillion miles away and you will see why e line forty times as long as the diam- the stars appear to be fixed in space. of the earth’s orbit, so observations One odd thing about distant de at it twenty-year intervals, recording that what appears stars is as a single one often nges in the position of Vega in rela- is two, as Sirius, or more. The presence n to inconceivably remote ones, are cor- of such plural stars was first disclosed pondingly larger, and the distance can by measurements made of the light emitted calculated. The work is made possi bv one of them, revealing the fact that the by the fact that vast multitudes of the star was both approaching the earth and are what is known as “fixed,” mean- going away from it at the same time.

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968 POPULAR DELIVER PAPERS BY AIRPLANE WITH SMALL PARACHUTE Delivering Papers by Airplane; the Bundle Attached to Its Parachute, Settling to the Ground Commercial application of the airplane restricted because of landing and take-off difficulties, but recent has been somewhat experiments at delivering goods from mov- ing ships by means of special parachutes, indicate that the number of landings may be reduced to a minimum. Shipments of typewriters have been unloaded in this way, and, a few days later, bundles of newspapers were dropped from a mono- plane in California and reached the ground gently after a quick fall of but a few feet to give the parachute time to open. The chute and newspaper pack pounds. They are released w pulls a cord. weigh but five hen the pilot HOW SALVAGING FARM TOOLS HELPED RESTORE SOUTH Following the Arkan relief Mis- as, Louisiana and Tennes- were with the immediate problem of saving human lives and then putting farms lisastrous floods in sissippi, see, agencies faced into operation MECHANICS again as quickly as possible. A deta that task involved a gigantic salva plan which saved millions of dollars enabled growers to plant crops befor: season was too late. Officials of the ternational Harvester company consult their records, and wherever they four tractor or other farming implement had sold, whether it was paid for or they went to the owner with this prop tion: “Get your wrench and oilcan come with us. We stay with you until your tractor is running and the ser will not cost you a cent.” In a few weeks more than 2,000 farming implements, t had been condition under water, were in work again and the owners were spared the expense of buying new equ ment and the cost of delays that wo have resulted otherwise. With the e couragement of Secretary Hoover, farme: were induced to plant corn, alfalfa, oat soy beans and other crops that had neve: been raised before in these sections. DISAPPEARING BED INSIDE AUTO LATEST CAMPING COMFORT Concealed behind the rear auto when not in use, a spring bed with fel mattress, four feet wide and over six long, is quickly extended and saves car! ing extra luggage on the running bo It clears the seats, the cushions are 1 used as supports or removed, and, het it does not damage the upholstery. L Drawing to Show How the Bed Folds Up under the Rear Auto Seat When Not in Use

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POPULAR MECHANICS ace of the Maharajah of Mysore as It Appeared under Electric Illumination; the Display Reveals the In- tricate Details of Indian Architecture SPLENDOR OF ORIENTAL PALACE MAGNIFIED BY LIGHTS modern genius can be applied to size the wonders of bygone days use of electric Architectural illustrated in the in famous buildings. ire thus more clearly revealed and of the of lost in the night. eauty structure heightened in- When the ma- of Mysore entertained the viceroy recently, he spared no pains in hospitality, a feature of the occa- + being the illumination of his palace, clowed like luminous lace. fIRE EXTINGUISHER LIKE PISTOL WORKED WITH ONE HAND operate a 1 na ire extin- iisher now on market, you ply pick it up, nt it at the fire | pull a trigger. An effective stream of me-smothering liquid is projected from the pistol-shaped unit to listance of thirty-five feet. The extin and barrel of usher is easily reloaded, working corrosion by The also serviceable as a substitute for parts are not subjected to contact with the chemical. article i revol ver in repulsing attacks, and, as only one hand is needed to use it, the other is left out hires free for aid in defense or putting CYLINDER LOCK IN DOOR KNOB GIVES ADDED PROTECTION A door that simply knob locks and spins around when it is without ] qaoor;r, secured, opening the is one of the most recent accessories for protection. It is quickly attached in place of the ordinary knob and fits any door. When unlocked, the knob operates the latch in usual fas! ion, but when the key is turned and the the outside le¢ turns without engaging the latcl ‘ 1 door locked. knob mere @ Write our Bureau of Information i you wish to know who makes or sells any article described in this magazine. Send no postage; the service is free.

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— Mount Wilson Observatory, in California, Which Houses the Only Hundred-Inch Telescope in the World It Is a Reflector, Employing an Eight-Foot-Four-Inch Polished Mirror ven largest eve in the world is planned for southern California. It ten feet in diameter. will be called. Mount ll be to \ reflecting telescope it will be It will be set upon the summit of Wilson, and its chief purpose wi tial objects. | better illustrate the ‘ photograph cele VN ot] ! ung could am- bition of man to extend the range of his knowledge and the faculties limits of ure nas en- to overleap the with him. In which nat dowed the development of to vision lies one of the greatest of man achievements. Yet the earliest scope dates back only to 1608, and spec- tacles were not known until near the end of the thirteenth century. Their invention is attributed to an Ital- ian, Salvino degli Armati, and for a long time nobody thought of any other way to use them than by holding them on the with one hand while reading or writ- fifteenth and people using them when the had been adopted—at nose ing. Pictures of the Six- teenth cénturies show in that ing “bow” way. Later, support- first of iron or leather, and then a spring—Nww emberg manufactured spectacles in en mous quantities, distributing them to parts of the world. Right the beginning. telescope gave to man supersight, and t climax of its development will be rep sented bv the Mount Wilson. The astronomical there has the largest reflecting telesc: in the world, in diameter; but the refiector of the co: there was gigantic ten-foot eye observatory alre: with a mirror lens 100 inche templated instrument will be nearly | again as big, gathering a proportionat: greater number of light rays from a cel: tial Gbject viewed. Reflecting telescopes are a relative! new invention. For a reason presently be stated, they can be made much larg than those of the which are’ called refracting constructed on a ferent principle. Thus the huge one planned for Mount Wilson will be more familiar kind telescope ] Thev are wholly di a tube that is a mere skel

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POPULAR MECHANICS Twenty-Six and a Half Inch Object Lens for a Big Refracting Tele- scope, Ground and Mounted Ready to Be ng Big Telescope Lenses Installed ; the Workman ractor Instruments, Which Gives a Comparison to Similar in Design to Opera ’ Show the Size of the es or Binoculars, the Light : Po. Big Glass Focused by a Series of —__ , : Groups; Right, Optical Fresh from the Melting Pot Mirror of the Hun- ed-Inch Reflecting Tele- pe at Mount Wilson; e World’s Largest Re- fracting Instrument Is the Forty-Two-Inch Lens at Yerkes Observatory, Wil- liams Bay, Wisconsin

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POPULAR MECHANICS The new the Mount 17 will be an mechanical Wilson enormous afi obser construction requiring n engineering skill. A soli counterweight of many to be used to facilitate the of the great tube, renderi Seventy-Two-Inch Reflecting Telescope in the Astro- physical Observatory, Victoria, B. C., and a Portrait of Galileo, with Two of His Tiny Telescopes ] Sah will be eton, built for lightness, without any ject glass.” At the bottom of it set the in diameter, disk-shaped glass mirror, ten feet a reflecting lens concaved and mathematical to be eround with \\ ] en accuracy. observations are made of a moon, or what not, the skeleton 1 la C\ be covered wit lindrical en- > OT Canvas. The light ravs that come from the celes- tial object pass through the length of the tube to the mirror disk, which reflects ] them back in the shape of a cone, thereby concentrating them and bringing them to a focus upon a prism. The prism diverts the focused rays at right angles to an eye- piece at the side of the tube. The ob- server, looking rough the e\ epic ce, sees the image of t star or other object. Or his eye may be replaced by a camera specially designed for making astronomi- cal photographs. balance fect that a can ea change its tion and to any of the The lens will be silvered make it desired qu heavens. huge refle S a not on the back like The the outside of the lens, on top of the ¢ so that light rays will be reflected dire from the bright metal That in seems odd, for silver soon ordinary mirror. silver will -be tarnishes, one might suppose that its usefulness reflecting surface would thereby soo! spoiled. Undoubtedly that would be case, were it not for the fact that the « will get a fresh coat every two wee! being lowered for that purpose into a t of molten order that chan of temperature may not affect its shape silver. In specially contrived refrigerating apparat will be used in summer to keep it cool

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POPULAR aking an object lens for a large 1e- telescope, the chief difficulty is to iece of glass big enough that is of uisite purity and flawlessness. Thiat t puts a limit on the size of ordinary But there is no such tion where reflecting telescopes are rned, because a few flaws more or n the glass do not matter. It is ed by a silver coat anyway, and the requirement is that it be ground to ‘-avity that is perfectly true. most important recent advances in omical knowledge have rh the invention of the reflecting ope. It is particularly well adapted elestial photography. Pictures taken ount Wilson, with the 100-inch in- ent, of landscapes on the moon, the e of the sun with its whirling storms e, so-called “spots,” and distant neb- hich are believed to be universes dis- from ours, are marvelously beautiful, irpassing any heretofore produced. is a far cry from the telescope of eo to the monster sky-searching in- ents of today. The invention, like another, was an accident. In Octo- 1608, an apprentice in an optician’s at Middleburg, in Holland, playing some lenses, found that by holding + { them in certain relative positions, pic lenses. come tained an enlarged inverted view of ts. His master, Hans ¢ his attention | to the phe- enon, fixed a Lippertuy, le of lenses in be and showed levice as a tov is window. It man miles away! ialileo, then re- ig in Venice, need to hear ut this curious vglass,” in June the following He made sev- il telescopes. ith his fifth he covered Jupiter's oons, opening ld see a v worlds for hu- in discovery. Easily Read in Frost or Storms; the Silhouette Traffic- Signal Posts for MECHANICS L Studying an Enlarged Reproduction of Fingerprints for Better Identification; Minute Marks Are Preserved FINGERPRINTS ENLARGED TO AID IDENTIFYING CRIMINALS For more accurate comparison and study of the fingerprints. of criminals and sus- pects, a means of magnifying them-with- out spoiling or altering the distinguishing has been Some of the prints are enlarged as much as 500 times. In this size, they are effective as +court- room exhibits in presenting evidence and accentuating telltale features. marks devised. TRAFFIC SIGN IN SILHOUETTE IS MORE EASILY READ For visi- bility, signs greater auto-traffic the highways are writ- ten in silhouette let tering, with spicuous markers Tests have that this stvle does not be- along con- near by. shown come obscured after frosts or storms so readily as printed The plan may be adapted for ones. airplane well, for traffic as the laid out on letters may be | directing top of roofs or on a land- ing fi - aly Highways field.

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POPULAR MECHANICS NO SHORTAGE OF TIMBER IN U.s ASSOCIATION DECLARES Contrary to public opinion, ther: abundance of timber in the United S at the present time, according to thi tional Lumber Manufacturers’ associ and the problem of a future supply of sufficient consumption now rathe: overuse. In other words, the body p out that it is not economical to pre “ripe” trees indefinitely, for only by keting those that are ready for use the industry be assured of reason profits from the work of growing trees FIND SHIPS HIDDEN BY FOGS WITH ELECTRIC BEAM Will the smoke screen, laid down protect battleships, become obsolete useless? Possibility that it may, is gested in a recent invention by John Baird, television expert, whereby an e tric beam is made to penetrate smoke Niches in the Wood Afford the Bird Convenient Store- house for Food but Are Disastrous to the Timber : es meets an obstruction. The nature ot THRIFT OF WOODPECKER HARMS obstacle is determined by focusing POWER LINES’ POLES beam upon a screen attached to the Woodpeckers devour many harmful in- P@tatus. Pests with the outfit on a coa sects, but also do considerable damage to teamer, running between Dundee mists and produce a sound whenever wooden power-line poles by using them as London, . indicate that the electric - storehouses for their food. As the accom- will be of great help in locating vesse panving illustration shows, the birds have logs, thus resulting in a decrease in m a habit of drilling holes in the wood and ste accidents with a possible reduct inserting acorns and other morsels. The oft insurance rates as a consequence. acorns decay and sometimes’ harbor worms, which the bird relishes. Holes in the pole weaken it and expose it to rot. Along some of the lines that pass through extensive wooded territory special patrols are maintained to keep the woodpeckers and other birds away. UNDER WATER LIGHTS IN POOL HELP PROTECT SWIMMERS To eliminate shadows and enable the swimmers to see the bottom of the pool . eet Rene, more clearly, lights have been installed under the water in an outdoor pool at Jefferson Barracks, Mo. They cause no elare and eight lighting units are sufficient for the tank, which is 130 feet long and fifty feet wide. The lights are inclosed in : ciall ‘ tructed “oiector John L. Baird, Standing, with Sir Arthur Keith at t! specially constructe¢ projectors. Electric Apparatus Which Penetrates Mists

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POPULAR MECHANICS i > te > * x = mers in the Dog Masks Starting the Race from the Punt Disguised as a Row of Kennels: Proved an Interesting Novelty at an English Meet, Due to Popularity of Greyhound Racing SWIMMERS IN DOG DISGUISE ADD SPORT TO RACE popularity of greyhound racing was ed at an English resort recently vimmers donned papier-mache dog ind leaped from a punt disguised as x box fora race. The masks were ted so as not to interfere with the mers’ vision or breathing and, being caused little, if any, dis- rt to the wearers. cht weight, AIR-CUSHION PAD INSIDE SHOES RELIEVES FOOT ILLS \daptable to the of the inflated hion feet, air fitted in- le the shoes, is 1 to provide a pful support to e arch, does not inge the shape of the shoe and keeps he foot from sliding off, a common trou- the Event ble with many styles of supporters. It 1s light in weight and, since it can be inflated to different degrees, solves the problem of raising the arches gradually. CHAIR WITH LOCKING JOINTS HAS LONG LIFE Parts of a the mar are held to gether by a pat ented mortise-and tenon lock joint as well as glue. This joint is justed harder a I memver; curely it holds, as the pronglike sions of the joint become more fir bedded in the wood. @ Experts have estimated that the average American breathes as much as five times his own weight in soot and dirt every twelve months.

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POPULAR For Added Protection against the Dangerous Captive; Steel Mittens That Prevent Using Gun STEEL MITTENS AS HANDCUFFS PREVENT USING GUN To restrain prisoners from using knife or gun, steel-mitten handcuffs have been devised by a western man. ‘They are hinged in the palms so that the hands may easily be inserted. GASOLINE FROM COAL AVERTS THREATENED OIL SHORTAGE After gasoline, the hfteen years of toil, a synthetic g invention of Dr. Friedrich Bergius, has been placed on the market in Germany. uct in The introduction of the prod- this country is not expected for some time. At the present time chemists are at work on the process which may greatly reduce the price of gasoline. The yy combining hydro- heat 1 } | new fuel is produced gen gas with coal by means of high and pressure. The then coal is pulverized and mixed with a heavy oil to a pasty mass. This is then placed into a light heated to about 800 de steel retort and grees Fahrenheit unde > 5 3000 pounds per a pressure of some quare inch. A complex mixture of @nse s obtained, as most of And liquid and solid com the carbon unites with the hvdrogen. then there are the pounds similar to those extracted from MECHANICS 1 natural wells. Through the princi, the Bergius process, as much a cent of the carbon in lignite, a low coal, is transformed into such oil pr \ ton of periments bituminous co shown, will yie pounds of gasoline, 400 pounds of common have oils available for Diesel internal-co: tion engines, 120 pounds of lubricatin and 160 pounds of fuel oils. From figures, scientists point out, it can be that threatened oil the next century any shortage will be averted. It a crime, they say, within the burn coal for fuel wl contains such valuable ingredients seem few years to PRINTING PICTURES MADE EASY BY COMPOSITION BLOCK An engraving block, built up of a lose composition, which is easy to c any direction, as it has neither the of wood nor the fiber of linoleum has been patented by an Omaha engt who is marketing the blocks in any de size, as well as tools for cutting from a simple poster to the fines work. The and will block is said to be stand up under press 20,000 or more without showing appré able wear. It is suitable for all fort simple advertisements, work, from monograms to and, as its surface is ored, it is easy to engrave. The outline the drawing can be placed directly on block with pen or pencil. Cutting En- graving B'ock in Composition Material, and, Inset, Sample of Fine Line Work

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POPULAR MECHANICS nens Which Have Been Preserved by the Paraffin- Treatment, Making Use of Alcohol or Other is Unnecessary; Some Animals Can Be Kept without Removing Internal Organs PARAFFIN BATH FOR SPECIMENS PRESERVES NATURAL FORM and vegetable specimens are to be preserved in their natural form colors more faithfully than can be ne by other methods through veloped by professors at the university ‘ 1 Lnimal a process Vienna. Because the samples are kept making the use of alcohol or other uids unnecessary, the system promises it aid to biology and botany students first ng liquid which prevents deformation step is treatment with a special Following this, the speci- and pre- rving bath, during which it absorbs the 1] stiff, and the driven The fixing prep tion is applied as soon after the death shrinking. en is subjected to a paraffin stance, becoming water mntent is out. the specimen as possible. It is said that the process can be performed with- out first removing an animal's organs. In promises aid, as the and the field of botany, it and forn flowers preser\y ed. 1 coior;rs natural i@aves are SHOWERS OF “VOLCANIC ASHES” PROVE TO BE POLLEN Botanists rather than geologists were required to solve a recent mystery in Alaska—the appearance ot a dust that was at first from a distant showed that the substance was pollen trom tine vellow supposed to be ash voleano. Examination spruce trees.

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POPULAR MECHANICS on or off. Only five seconds are re to illuminate them; when the op: turns the “off” button in the power | the transmitter automatically operat ten seconds and cuts off the lights. A, the advantages claimed for the syste the following: existing circuits are for transmission of control energy usual distribution of power is not aff. in any way; interference with telep! and radio space is avoided, and the tem is equally applicable to grou and ungrounded distribution installati Lightning, switching surges or stray rents do not operate it, and since the “ and “off” operations are distinctive, t| can be no doubt as to the condition of t! circuit at the remote point of contro! CHIMNEY CLEANER AND DRAFT COMBINED IN ONE Better regulation of the furnace ( and a means for quickly cleaning the c! ney are afforded in a patented install introduced by a western inventor. It sists of a brush, operated on an en shat y a crank, trape off soot Comfort for the Traffic Policeman While on Duty; ch oar by 1 crank to scr ipe olf so Booth and Oil Heater Keep Feet Warm dust inside the flue. The door to the b HEATER FOR TRAFFIC POLICE MAKES WORK EASIER ing to the front of the furnace for « With an oil heater and a protecting adjustments affecting the draft. The « chamber, which opens at the base of chimney, is hinged and has a chain |e shield about his post, a traffic policeman fit is said to give protection against | in Boston is guarded from chill winds and reduce fuel consumption and improve dampness while on duty. The walls about operation of the heating plant. the station help retain the warmth from the heater and protect the officer’s feet. LIGHT STREET LAMPS BY RADIO IN EASTERN CITY Similar in many respects to the familiar radio transmitter, a long-wave, low-pow- ered vacuum-tube sending set, operated for a few seconds daily, controls all the street lights in the city of Glens Falls, N. Y. The system, developed by engineers of the General Electric company, marks the first commercial application of radio to such a function, and is so regulated that instead of spreading out in all direc- tions as they do in radio broadcasting, the impulses are confined to the wires to receiving stations. There switches are tripped, relays operated and lights turned 4 Zurn of the Crank Helps Clean the Cais

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the Brocken as Seen on the Top of the Famous German Mountain When Throws the Explorers’ Shadows against a Rainbow-Marked Bank of Clouds |. ING across the Pacific, bound for casionally from the nolulu, Smith and Bronte, pilots of | straits, which lie betw Italy and Sicily City of Oakland,” sighted a number For hundreds of years it has been famou nds where no islands were. When as the mysterious city, popularly believed finally reached the leper colony of to be built on a submersible island, and hipelago on the last drop of gas in home of the Fairy M r K ks, they believed, at first, it was Arthur of the Roun: tT 1 iT) inother mirage, and hesitated about ing to the superstitious ng outa place to land. neighborhood, is an. imm« Charles A. Lindbergh, on his flight possessed of magic powers, iris, encountered the same sort of the island rises or sinks bene ge, several hundred miles before he They tell stories of mariners | hed the Irish coast. Ahead of him he misty city, cast away mountains, valleys and grassy glades never seen again looked so real it was difficult to rec- he phenomenon le them to the fact, which he knew, —a distorted image he was still some hours from the on the Sicilian side under ordinary c lirages are not at all uncommon, watcher in Italy, r, because oft ugh aviation has made it possible for ance, it lies far below the horizon. ne who cares to go up to have the ut occasionally, he afternoon ince of seeing at least one. The world’s hot day, when the sea is unusually st famous optical illusion, the Fata layer of air, cooled by tl rgana of the Straits of Messina, has spreads the sea, with a ly succumbed to modern photo-tel- above it. This juxtaposition of c cameras and been reduced to paper of different densities causes a bending Fata Morgana is a mirage seen oc- light ravs toward the observer, and he

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980 POPULAR MECHANICS ually sees objects which are below the horizon. The ap- pearance of the mi- rage is always pre- ceded by the form ing of a streak of | mist along the hori zon where the two L— layers of air meet, due to the conden sation of moisture in the calm air by the coolness of the sea dissolves, and the magic city begins to up- lift itself in the distance, its towers and palaces taking form with all the seeming Presently the mist of reality, only to melt away, become in- distinct, and disappear after a little while. The image is not a true picture of the hidden city across the straits, but is made up of indistinct and wavering lines, the distortion accounting for the fact that the superstitious natives never connect the vision with its actual cause. Occasionally the atmospheric conditions may be reversed, with the cool air above a warmer layer, and then the vision is re- versed, and the fairy isle of Fata Morgana is apparently seen beneath the surface of the sea. That is the form of the true mi- rage seen on the desert, while the cit the air is technically ascribed to “loo: The most common desert mirage the form of a cool lake of water, whic! pears miles ahead of the thirsty tra Actually, the mirage is due to the ben of light rays in such a way that a por of the sky appears below the horizon. ing the impression of a blue lake. Li ing also is fairly common in the desert mud walls, towers and minarets of distant villages appearing in the sky. soldiers of Napoleon on the Egypt campaign were so awe-struck by the tacle that they fell down and prayed Alaska and Greenland both are fa: for their aerial | toms. Seamen ing along the « — coast of Green see amazing spi cles: due to the OVEi tu icecap | chilled, while wa: currents lie abo Then the light are bent down and the distant « viewed through a escope, appear = St. Elmo’s Fire, Top; an Actual Spectral Image Ph graphed on a Cloud, and the Death of Prof. Richn a Russian Scientist, from Lightning

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POPULAR MECHANICS 981 ectral Image Sketched from a Ship off the Coast of Greenland, Showing the Spires and Towers Produced by Distortion of Light Rays in Two Currents of Hot and Cold Air : can omes, minarets, obelisks medieval tortifications Che struc- ive all the appearance of being sub- forms are con- save tot their or ; : e Silent City of Alaska occasionally above the great Muir glacier, is a ir phenomenon. It looks so much in ancient fortified city that specta- have often sworn they saw people king in the streets. Actually both the ns are due to distortion of icy pinna- . and peaks. t isn’t necessary, however, to go to the ert « ‘tic wastes to see mirages, aviators encounter them regularly in ng through clouds Drops of moisture he atmosphere break up the light and m marvel. .- rainbows, which, unlike bows seen on land, are complete cir- es, as the eye is not limited by the hori- n. Instead of the single or occasional ble rainbow on the ground, there may many of them, one inside the other, | d, if the position of the sun is right, in | bows The ige is simply the shadow of the plane, the concentric ll be the image of your airplane. e exact center of rown by the sun on a near-by cloud. (he famous Brocken specter of Ger- iny, and similar illusions seen by in climbers, moun- are due to.the same cause. first German he phenomenon was observed on mountain, hen an explorer was startled to see what e Brocken, a noted described as an enormous giant walk- along through space. The sun was behind him at the time and threw hi hadow on the cloud bank, greatly magni fied, and as the mountaineer walked, the hadow ppeared like some advancing viant. Around the specter is often seen one or more rainbow circles. Not all mysterious phenomena are a easily explained. No one, for example has ever been able to account for bal lightning, first recorded when the piou worshipers of Tours, France, saw a huge . Ot hall of ivinge tlame hover I Ving i over the head of Bishop Martin while that prelate, after ward made a saint, was dedicating a ca thedral. Yet, the appearance of these huge balls during thunderstorms i 1S not at all unusual, and many have been startled ] . : +1, 1 “9 ‘ ] . 11 Vv seeing them hovering in the air, rolling through a house or across the ground sometimes striking the earth and rebound ing into the air, and again bursting with a terrific thunderclap. Dazzlingly bright, they are sometime and Some who have seen them have described white, sometimes- blue, again red a peculiar hissing, humming sound as they moved, and t 1eir speed may be fast o1 slow. They apparently have an inclination toward entering houses, floating ’ through open doorways or windows o1 coming down the chimney. Now and again they set fire to buildings: occasion ally they kill people In one recorded in stance, a lightning ball killed a dog in a girl's lap without harming her In size, they mav be anything from that of a golt ball to several feet in diametet

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982 POPULAR MECHANICS Photograph of the Fata Morgana, the Illusion Which Brings the Picture of the Distant City of Messina « the Curvature of the Earth, to Make It Visible from the Italian Shore During the progress of the tornado that struck Louisville, Ky., in March, 1890, numerous balls of living fire, the size of oranges, added to the fright of the terror- stricken victims. In the darkness, all of the lights of the city having been put out, they rolled about the streets and along telephone wires and the cornices of build- ings, and finally exploded with tremen- dous reports. A Russian scientist, who tried to dupli- cate Benjamin Franklin’s kite experiment, failed to take proper precautions. A ball of lightning ran down his kite string, blew up, killed him and knocked his assistant unconscious. On high mountain tops, tufts of light often appear about persons’ heads. At sea the same thing is seen on the mast- It is known as St. Elmo’s fire. It may sometimes be heads and rigging of vessels. seen springing from church steeples or other prominent points. It is not at all mysterious, being merely a static discharge such as the familiar “brush discharge,” seen about high-tension electrical appa- ratus when operated in the dark. FLYING BICYCLE TO HAVE SPEED OF FIFTY MILES AN HOUR Revival of the bicycling craze is seen as 1 } a possibility in the invention of a Viennese engineeft who has added wings and a pro- peller to the unit for travel through the air. He hopes that the rider will be to attain a speed of forty to fifty 1 an hour, rise from the ground at reach altitudes of 3,000 feet, and all practical safety. Tests with a quart size model of the machine have justi! his predictions, he asserts. The prop: is sufficiently high above the bottom the rear wheel not to interfere with tt on the ground; the entire outfit i weigh not more than 100 pounds. wings and guiding planes.are contro by moving the handlebars. GAUGE TO PLACE DOOR HINGES SAVES TIME AND ERROR er To simplify task of fitti1 hinges, a gauge hung from the ti of the door a1 the size and po tions of the hing: indicated on t!] wood by adyjusi ble cutter head A rap of a hat “| mer on each ot t! | three markin a | | units is sufficier ~ | to outline tl 1 places to be chi eled out. Repeating the operation against the jamb, insures accurate matching. -_*

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POPULAR MECHANICS FITS FROM PONTOON BRIDGE REWARD BUILDER ity to serve the community in an ency has put dollars into the pocket Oregon man and prevented serious A flood wrecked the steel Rogue a in travel. river at Galice, ne of the enterprising citizens quickly over the ed a franchise from the county court nstructed a pontoon bridge, on four total not Tolls have paid for the and more besides, while the steel ‘t was being rebuilt on higher piers cost of red scows, at a than $700. e | event a repetition of the washout. - RAILWAY KEPT FREE OF WEEDS WITH PUSH-CAR CUTTER ym an ordinary flat push car, about $18, and at a Pennsylvania constructed an et weed cutter to keep the right of | pense of aad foreman has ee trom growth that damages ba ind ties. The cutter itself is like that farm mowing machine, and the out is cut more than twenty-five tons of ona stretch of over six miles, doing wing Weeds along Railroad Tracks with Push-Car Cutter, Made by Foreman at Little Expense tour hours what would have taken six en about five with hand ‘nly one man is required to operate it, e cutter is adjustable to different heights, swath days tools. ikes a four feet wide and, when in use, can be elevated to an upright sition. A small motor car furnishes the hecessary pow er. t yt L Boguslawski with the Scale Used in Weighing Hand Pressure He Exerted in Playing Selection POWER NEEDED TO PLAY PIANO MEASURED BY SCALES Moissaye Boguslawski exerts hand and finger pressure of more than four tons while playing Rubinstein’s “Staccato Etude,” making as many as 540 chord strokes to the minute. Three pounds to a chord is about the average pressure, as shown by scales which are used as the piece is played to record the effort re quired. In one performance, he finished the number in six minutes with a total pressure of 9,720 pounds CARRY LOCOMOTIVE ON MULES FOR MEXICAN MINE Since many mines in Mexico are located far back in the mountains and accessible only by narrow trails, it is transport the machinery on This with units as large as locomotives, necessary to the backs oft mules. has been successfully done which are thus transported, piece by piece, across the rugged and the mines country reassembled at @A radio loud speaker has been success- fully used in a German orchard to frighten away birds.

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984 POPULAR MECHANICS Absence of Braces under This Monoplane Wing Is Calculated to Make Greater Speed Possible; Support Obtained by Cantilever Construction of the Wing Itself PLANE WING WITHOUT STRUTS son enjoyed further comtort as each SUPPORTS SEVENTEEN MEN was protected by a glass windshield, bre ing the force of the breeze and war To test the strength of the unstrutted off smoke and cinders. The protect wing of a monoplane recently constructed, were designed and adjusted so as not seventeen men stood on the ship, and care obstruct the view. it it suffered ag under the PaDIOMEN MAKE OWN WEATHE! ful measurements showed tl no damage and did not s weight. The wing bracing is entirely _ aS S TO TAME STATIC concealed within the outer fabric and is constructed on the cantilever principle. Radio manufacturers have called in Absence of the struts outside will afford ‘air-conditioning engineer’ to aid the possibility of greater speed. in making tests on the effect of weat on reception and broadcasting. In the SHIELDS ON OBSERVATION CARS laboratories, temperatures from zero 100 degrees, or higher, can easily be « ADD TO TRAVEL COMFORT ee te el oe i ated and a wide range of humidity p: Travelers riding on the roofless obser- centages produced to determine any vation cars Of a western railroad this sea- nificant reactions. Another problem the weather-radio qu: tion is more definit: studied, namely, what t! interior temperature moisture should be keep the set in the m« satisfactory working co1 dition. Will air that too dry warp and dama the set as it does piano and other fur1 ture? What is the resu of too hot and dry air « batteries? Tests ha shown that dry air fr quently causes the aci in batteries to creep ou New Observation Car of Western Railroad with Seats Having Separate Wind- ° : } shields to Keep off Smoke and Dust of the boxes upon ¢

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and that is why some radio users the best place for the batteries in basement. A _ suitable ture with air in the house is better the radio as well as for health, experiments have shown. In _ the ideasting rooms, improved ventilating air-conditioning apparatus has been talled, to insure more comfort for per- ners and better quality of the music. MYSTERIES OF PRECIOUS GEMS PUZZLE SCHOLARS Vhat becomes of a diamond when it is ned up? It leaves no ash and when it illy blazes itself out, there remains not n so much as would dust the point of eedle. Sapphires are shrouded in mys- In the Orient, there is a species of ler which dies suddenly when placed in box along with the gems. According to e scholar, this jewel “feels with the air,” npathizes with the heavens and does shine equally when the sky is cloudy bright. Opals also present a number riddles. They are comparatively soft out of the earth, but grow rder after exposure to the air. Plunged to water, they disengage small bubbles gas while their warm tints are some- es emphasized by the heat of the hand. urquoises are noted for their peculiar lor changes. Often they are pale, then irn spotted and may change from blue to ite. Their original value may double treble ina single night because of these ystifying changes. stly en taken One of the rare and Alexandrite, has een satisfactorily imitated. This gem is emerald by day and amethyst by night. (;enuine rubies con- tain little bubbles and have a silky heen. Experts have found such success- tul ways to imitate them that extensive research into the genuine stones, which are worth about twelve times as much as dia- monds, weight for weight, has been dropped. stones, not yet mixture of Teapot Service Station Attracts Attention and Proves Practical; the Spout Serves as Chimney POPULAR MECHANICS 985 Branding Beef with the Needle Marker; Stamp Is Im- edded beneath the Surface for Permanence NEEDLES BRAND FRESH BEEF TO IDENTIFY GRADE The two best grades of its fresh beef are being stamped with a needle-branding de vice by a packing company. The marker is constructed of phonograph needles that prick the design on the meat as the unit is rolled over it. The sign is repeated quickly, and little time is required to reg ister the identification. It is said that 60,000 needles were required to make it. SERVICE STATION LIKE TEAPOT USES SPOUT FOR CHIMNEY Novelty is chief the feature of a service station re huge but the spout is also useful, sembling a teapot, for in the winter time it serves as a chimney. With the handle, it is made of clay and plaster of paris, while the out- side of the building is of shingles.

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986 POPULAR MECHANICS BIRDS’ WINGS EMULATED IN NEW SAILING YACHTs IN THE YACHTS PREVIOUS TO 1850 THE SAILS WERE MERE WIND-BAGS,AS DEPICTED 'N THE MODERN RACING YACHT HER SUIT OF SAILS 1S BEAUTIFULLY AND SCIENTIFICALLY CuT TO SET FLAT 1851. THE"AMERICA” WITH HER SAILS LACED To TWE WHICH A REVOLUTION IN THE SAiL- PLANNING OF RACING CRAFT RS iN THE YACHT OF 1848 WITH HER LOOSE -FOOTED “WIND - BAG” SAILS THE RAKED MASTS OF THE AMERICA™ , LASTED IN VOGUE FOR & OR 9 YEARS ‘ APPROVED SHAPE OF FILLED-SAI PREVIOUS TO. ----_- ss il THE WAR 2 Tears | AERODYNAMICS : - STREAMLINE i be TAUGHT THE YACHT ‘= SHAPE re pRovuceD } PLANNING warn SAIL DESIGNER \ ALL .TAPERING THE ADVANTAGES ‘> MAINSAIL , NO OF THE TALL, NARROW Peay nee . BOWSPRIT AND | SAIL. GAFFS WERE RIG WITH TALLTAPERING ACCURATELY PEAKED- UP AND ' ' MAINSAIL, AND TOP- / / \ CURVED MAST THE SAIL MADE MAST CURVED 10 LESS SQUARE - FOLLOW THE ~TRIATIC HEADED BUT EXACT CURVE / STAY MASTS BECAME OF A BIRDS DANGEROUSLY f , WING | HIGH |

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POPULAR MECHANICS LOR PHOTOS OF MARS RESULT IN NEW RIDDLES ‘lor photos have enlisted on a large at the Lick observ- in an effort to solve of the riddles of While data been gathered, still ter perplexities have new ulted, for, among r things, the color tures reveal that the rtian atmosphere con- ns a type of blue cloud h a composition that far defies analysis, and atmosphere proba- extends more than miles from the sur- e of the planet. The Riding the Paste otographs were taken ough the thirty-six-inch refracting tel- ope, enlarged and carefully studied, the e of ultraviolet and infrared lights en ing the the net with its atmosphere surrounding it a blanket or photographers to show “peeled away,” reducing e interference. It has been established it the atmosphere supports ter-vapor clouds similar to those found planet’s ove the earth and by means of the in- red-light which penetrate the mosphere, it has been determined, in the inion of the scholars doing the work, it the “canals” on the surface of Mars re not optical illusions but are growths photos, vegetation and that the planet is some eventy miles irmerly less in diameter than was supposed. than 1,700 hotographs were 7 taken and enlarged n such a way as to lore nerease the size of the observed planet about 800 times. (he astronomers made a new map of the body, 150 photos, propose to study it with the aid have using and “Bottle” ; 987 Revlica of the Dentifrice Container Used for Amusement Purposes at Beach BIG TUBE GIVES BATHERS RIDE AND ADVERTISES PASTE At a chored tube, representing the container of a brand of toothpaste, afforded bathers amusement. German seacoast town, an an It was placed where it would float at high tide and be visible to every one at the beach when the waters receded. WALL TIE FOR CONCRETE FORM SAVES WORK AND COST Cut-to-fit wall ties for binding concrete forms together have been placed on the market. The tie is essentially a piece of wire with lugs that fit over the edge of the form, the ng the bending it saving task of unrolli wire, around timbers and cutting it to the right length. With the ties, the stud ding can be alter nated so that fewer uprights are needed. Since nails do not have to he driven forms, the life of the lumber is into the of motion pictures. Concrete Form Fastened with Wall Tie That Is Quickly Adjusted and Saves Labor prolonged.

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988 POPU MODERN VIKINGS PROVE ERICSON’S FEAT POSSIBLE LAR MECHANICS f A4 j } den ey Voya ge of~ Cc) a ca a . || CAPTAIN FOLGERO | Py se rrr ey ; i ing é, Cus 4° | ex? Lay aie 4 ; 7a 4 ~. 4 too, ¥. we y “ onl 4 a * SHETLAND iS ‘WF » a pW, Le 3 recs ron ay -~ BRITISH |S 4 4 } & * « - 2 * * * * , 4 : EUROPE Voyage of the “Leif Ericson” across the Atlantic in the Path Followed by the Famous Son of Eri yn the Voyage of Discovery That Brought Him to America lwo Viking ships, a Norse longboat of its oars for calm weather and its rows lightly more than eighty feet, constructed painted battle shields, across the westet to the same size as one aug ip in Norway ocean by L\ ot the Shetland and Faro fifty years ago, and a half-size replica met islands, Iceland, Greenland, Labrador an in Chicago recently as a result of a mod Newfoundland in twenty-nine days, bat ern Viking’s desire to prove not only that tling gales and ice fields for a large pa Leif Ericson’s voyage oO! di covery to OT tl e Wavy. \ Ca anchor and a supp! \merica was quite possible, but that it of oil bags, to smooth the worst sea could have been done in uch smaller fresh water and _ provisions for thre boat. The longboat was one built by Not months constituted their chief equip way and sailed across the Atlantic many ment. From Bergen, Norway, they saile vears ago for the World's Columbian ex to the Faroes, by iy of the Shetlan position at Chicago Che half-size boat. group, and were given a ceremonial wel forty-two feet over all, twelve feet nine come by the Norse community Phet inches wide, and drawing four feet of they bore northwest to Iceland. where water, was sailed from Norway for the Eric and Leif, his son, lived, the small boat Philadelphia exposition, and then followed almost foundering in a terrific hurrican the route of earlier and bigger proto on the way. It took five days to reac! tvpe in a tour of the Great Lakes. Capt Iceland, and after a one-day stop to re Gerhard Folgero and three companion plenish the oil supply, they set sail fo brought the little ship, with its single mast, Greenland After reaching it and sailing

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i= POPULAR MECHANICS 989 ind its southern end, crossed to Labrador, ce blocked them, so tually they had to go » St. John’s, N. F., re they could reach a bor to rest and repair. AIL LAYER IS RUN BY ONE MAN Operated by only one a rail-laying device, tructed by a section eman of the Pennsyl- nia railroad, is said to the work of twenty n. The outfit weighs 100 pounds and was ide from odd materials ken from the railroad yards. It is espe- lly adapted to the placing of new rails ere small crews are available. It is irted that, with the outfit and six men, inventor has laid as many as eighty- rails in a day. CARRIER HOLDS EIGHTY PLANES AND COST FIFTY MILLION Kighty airplanes will be accommodated the carrier “Lexington,” which is ex- ‘ted to be finished next January. It is feet long, displaces 35,000 tons, will rry a crew of 1,700 men, and the cost i proximately $50,000,000. t Part View of the Airplane Carrier “Lexington,” Which Will Have Room for Eighty Planes and 1,700 Men Police Timing an Autoist with Aid of Periscope as He Drives through Tun- nel; Speeders Are Pursued PERISCOPES TO TRAP SPEEDERS AID TRAFFIC POLICE Small periscopes, similar to those used in the trenches during the war, have been adopted by the Los Angeles police in a campaign against automobile speeders who persist in exceeding the limits while driving through tunnels in the downtown district. Concealed, the police can check the speed of the car through the instru ment and pursue it, if necessary) OVEREATING AFFECTS THE EYES STOMACH BALLOON SHOWS By swallowing a stom ach tube to which a small balloon was attached and inflated, a subject at the Rush medical college re cently demonstrated to physicians how overeat ing affects the vision. Di tention of the tomach produced results simil to those arising after eat ing a large meal. Within a few moments after thi balloon was blown up the subject becam« drowsy and extra effort was required to read. Ex amination of the eve showed that vision wa distinctly impaired.

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It Saves Towels and Laundry Bills; Clean- ing Glove for Dirty Hands Helps Remove Grease and Paint Clothes Sprinkler Dis- tributes Water Loom for Weaving Small Articles Is Easily Set Up for Difterent Sizes Carpet Washer for Your Home; It Scrubs and Dries the Nap Cotton-Tane Mop Head Will Not Drop Threads For Small Washings, Spring Outfit on Tub Does Work Thor- oughly and Easily

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Percolator, with Sep- arate Base for Heat- ing Other Liquids, Is Easy to Clean and Operates Quickly Safe and Sisen, This Househo Incinerator Has a Spark Ar- rester at the Peak of the Stack, Is Lighted from the Top and Burns Contents Thoroughly Something New in Can- dies for Tablecloth or Other Location; It Needs No Stick Handle on Extension Electric-Light ; ? r ies Searchin in Dark atitt SAILS. j if FeCre Bulb Simplifies Searching en - Closets and Promotes Safety fe eases ae ate ie ee, ws Puppy Purses with Quick-Closing Run- ner Clasps Please the Children; Pinch the Tail and the Doggie Whines Inside This Attractive Cab- inet Is a Five-Burner Gas Stove with Generous-Sized Oven and Broiler Space Un- derneath; Control Handles Are Back of Grill Work and Doors Open Downward

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992 POPULAR Sliding Body from the Auto Truck for Easy Unloading, and Rear View Show- ing the Gear That Moves the Body | AUTO-TRUCK BODY SLIDES OFF TO SIMPLIFY LOADING To save time and make trucking easier, a California introduced an units, somewhat like those now in use on freight and trains. he of the truck slide the body, platform reversing the inventor has easily demountable body for motor express power itself is utilized to loaded or empty, upon a and readjustment is made by process Small wheels on the -— body permit moving it around for ease in removing the contents or filling it and thus save hand truck- ing. Only a few quired to haul it on. seconds are re- remove the body or ‘COCOA-ODOR FERTILIZER LATEST GARDEN AID Fertilizers with have been cently by the | | | unoffending | odors prepared re- | ureau of soils from the by-products of cocoa and MECHANICS iachaia duced annually in United States. It is to contain considera quantities of nitr and is easily appl Other fertilizers | been made from dri shrimp crab waste, waste and bran ELECTRIC PUMP TO RESTORE BLOOD CIRCULATION By means of an app ratus which circulat the blood artificially Vienna specialist h provided an effecti unit, already successfully demonstrat in cases of drowning, heart failure, ner instances of tem] ary cessation of normal life functio ous shock and like t 1s said to overcome one of the cl dithculties that has defeated attempts in this direction, that is, g previot ing the blood back into the heart. the new apparatus, by simultaneous stimulatio: of the abdomen, the lungs and the heart resulting in restoration of the activity this is accomplishe mechanical he heart, arterial system and lungs at ind the same time. The outfit is port able and may be operated by electrical cur rent from regular circuits or by a speci motor. It has been, designed especiall for life-saving units of all kinds and | been successfully demonstrated. Some 20,000 tons substance are other materials. of the cocoa pro- Using the Pump Which Circulates Blood Artificially, to Aid in Reviving Persons Nearly Dead

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POPULAR MECHANICS Views of the One-Man Shipyard and Its Operator; Part of an Unfinished Ship and Mr. Hoffman at Work; Seagoing Vessels Are H MAKING SHIPS IN BACKYARD PROVES PROFITABLE HOBBY \ backyard in the outskirts of a large is not the place you would expect to a shipbuilding plant, but such is the ation of one at Portland, Oreg., turned out nal which four seagoing motor fish ‘ boats and has construction of the fifth nder way. The enterprise is conducted holly by one man, Samuel Hoffman, who been building ships teen as a hobby for \ carpenter by trade, he ves his spare time only to the boats and years. inks nothing of devoting two or three ears to a single ship. The trawler he is ww building will have cost approximately $10,000 when it is finished. Its ‘ninety ribs re of eastern white oak, the boat is forty- two feet long, with an eleven-foot beam. ind will be equipped with a thirty-horse- ower motor. When the boats are fin ished, they are taken by house movers to », Launching One of the Craft, s Specialty the Willamette distance of five and one-half miles, and launched by crane for the journey to the Columbia river and out to the sea. river, a HEATER UNIT HELPS START CAR AND SAVES GASOLINE Adaptable to all makes of automobiles, or to other combustion motors, a heating system forces an air current at some 300 Fahren- 1 heit into the in- degrees take manifold to simplify startir the consists of: 1g engine. It i motor and small fan, the air being electrically heated coil driven over an through a flexible tube into the manifold. The necessary energy is derived from the storage battery.

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POPUI Removing Rivets with Cutter That Has Shield At- tached, and Close View of the Guard RIVET-CUTTER SHIELD REDUCES LABOR AND AIDS SAFETY In removing rivets from steel cars and other units, two generally are re- quired, one to shield and catch the rivet head while the other operates the cutter. With a wire net. which fits on the end of men the cutting hammer, the danger of flying heads is eliminated and only one man is needed, an additional ad- vantage being that work- ers can directly opposite each other with- out danger. operate “POCKET” BALLOON CARRIES MAN 300 MILES Weighing pounds, balloon but fifty a twenty-foot recently carried a man from New Jersey to the Adirondacks on a 350-mile overnight trip. He landed near a railroad station, emptied the bag of its 4,000 cubic feet of hydrogen, packed the bal- Drawing to Illustrate Operation of the “Light Cell Policemen” at tions; Cars Interrupt Beams from Beacons to Actuate the Signal AR MECHANICS loon on his back and walked to a t He had sufficient gas and ballast to gone 250 miles farther, he declared. pilot’s car was just large enough to one man and carried him standing. LIGHT CELLS AS POLICEMEN TO REGULATE TRAFFIC As a substitute for the usual system of stop-and-go lights to regulate automo! traffic, an attache of the bureau of sta ards has developed a means whereby cars themselves actuate the signals to eli: inate unnecessary delays and clear t! road which is open to traffic at the proj time. An essential unit of the installat is a light-sensitive cell in the center of 1 street, not far from the intersection, exposed to rays from a spotlight shin directly opposite to it. An automol passing between the cell and the spotlis and thereby interrupting the rays, wot cause the cell to operate a relay cont: ling the traffic signal. For instance, a « approaching the sign would set the signal, halting traffic on the intersect highway. The sign remains on for a f seconds to allow the following cars pass, so long as they intercept the lig! beam on the sensitive cell in time to p1 vent signal them. the from changing agai An advantage claimed for the s\ tem is that no one street is favored ov: another but both are controlled accordi: to the actual demands of the traffic. Intersec-

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POPULAR MECHANICS 995 ernment Food Tasters Putting On an Ice-Cream Eating Contest, and Getting Paid for It; Their Jobs Re- quire Acute Development of the Senses, and Few Can Qualify How Uncle Sam’s Food Testers Help You Glass Stomachs and Rats Also Are Used to Determine Nutrition Value of Different Table Products By C. MORAN Bip LE Sam now has a staff of official of 100 legs of lamb from animals com food tasters at Washington whose job monly bred in the western range state to determine the palatability of foods These animals had been produced at the ked in the experimental kitchens of the government sheep-experiment station rtment of agriculture. Glass stomachs Dubois, Idaho; they were fattened at Pur used to determine digestibility of foods due university, and slaughtered at the go rats to demonstrate body-building ernment experiment farm at Beltsvilie, Md tors, but only the human palate can de- Twenty-five legs from each of four dif line palatability, which is regarded now ferent breeds were cooked in the depart- the government scientists as of high ment’s experimental kitchens, in lots of ortance in food-value determination. eight, in temperature-controlled ovens Food tasters are department officials Five judges scored the cooked meat. the » score the food for taste, tenderness, tests resulting in specific recommendation vor and other palatability factors. Ice- as to better production methods to satisfy ream tests were made recently in which consumer demands, and in a_ standard e officials were required to eat their fill method of cooking lamb with a maximum ice creams made in different ways of palatability and a minimum of labor ere was a decided preference for rich, and fuel consumption eet and firm ice cream. Department experts say there has been \nother tasting experiment recently was an unfortunate tendency among students

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996 POPULAR MECHANICS the vegetables into pieces and cooking in a flat pan on top o stove with a minimu water, to which a littl has been added to pr the vegetables from ing to the pan. The \ tends to evaporate ar is often unnecessary pour any of it off. Many new recipes new cooking met! have been developed the food tasters. 1 found in beef-tasting periments that succe results in roasting are obtained by a pre! inary searing at 250 Centigrade, then lowering the temp: ature to 125 degrees | grees tigrade for the remain of the cooking pel In This Air-Tight Chamber, the Body Heat and Energy Developed by Meas- ured Amounts of Food ProductS Are Determined of nutrition to underestimate the tance of palatability, individual preferences and how impor- family customs, but the question of foods go together, from the stand- point of taste as well as from that of body building and health, must always be kept in mind. The human pal of flavor and also differences Many food customs have in response to instinctive the body. ite seeks variety of texture. been formed requirements of g ithered people In early days, wild herbs and greens of \ ‘ious kinds, but not until very recently was it known that these foods provide an important dietary principle necessary for | 1 1 lealith., The in- stinctive demands of the human body, ina less fertile and prosperous country, might have led finally to the custom of satisfving body needs by means of simple, palatable meals, but, as a matter of unusual for a fact, it is not meal to provide several starchy foods, several animal protein foods and several fat foods, which means waste of materials and labor. The so-called “vegetable plate” has re- ceived much attention in the government food kitchens, where a “panning” method has been developed, consisting in cutting The time of cooking be shortened by cool at 150 to 175 degrees, | the evaporation and dripping losses crease and “doneness”’ there is less uniformity as compared with meat cook: at the lower temperature. The results of the food-tasting expel! ments are being related by the departm«e to production and marketing problet Food habits in this country have chang: markedly in the last consun tion of wheat and meats having decrea lew years, with a corresponding increase in consum tion of fruits and vegetables. Departme: figures show that the consumption of t! latter commodities in New York city alo: has increased more than twenty per ce in the last the city population four pe five years, whereas than cent during the same period. increased less An official tea taster for many years | been employed by the department. H job is to brew tea from samples taken fro imports. This official now is making series of experiments to determine wheth« the flavor of tea is affected by the type o containers in which it is packed. The de partment also has a corps of butter taster who inspect and grade creamery product The palatability tests are a part of the

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POPULAR MECHANICS ment’s recent ac- to determine con- preferences for dif- food products and Nation- been oO! toods. 1 irvevs have he consumer de- for milk, meats nd vegetables, the rvev deal The ing with investiga- terviewed house in scores of cities earned, among other that housewives e Tor Is a Glass “Stomach,” in Which Government Chemists current has been put. It is employed to operate 9 licate measuring instruments at the de government labor aeronautical test- ing itories, in \ iret harnessed to cl is unchurned to make eardeners are sect which pests are trapped pans of oil under electric lights; reducing ma- and the to run his drills. beauty experts run 1 chines with it dentist makes use of it the Digestibility of Foods, and at the Left, Below, the Ice- Cream Plant not know there is more than one kind prune, dealt lled Italian prune, which is a sour prod- The survey with the so- grown in the northwest. (he department’s survey of meat con- that two or three cuts of meats, whereas an imption revealed housewives know imal carcass provides a dozen or more. SPEED GROWTH OF MUSHROOMS WITH ARTIFICIAL “STORMS” “Synthetic” uced in electrical storms are Pennsylvania cellars to pro- speed The dis- ance creates ozone in the air which is ivorable to the rapid maturity of the hs \ public-service company re- found that there are 8400 uses to he development of mushrooms. wet GAS FURNACE FOR HOME REDUCES COST The many advantages of gas for heat- ing purposes long have been recognized and, to utilize it still further, a special fur- been devised. Burners the Bunsen type and air, heated to a high ] degree, passes through large nace has are of steel cham- bers on each side of to extract from the combustion area usable heat horizontal the into degree ot consumed. \ flue at leads ever) the gas top the ad- feature is chimney. An ditional thermostatic con- trol to regulate the flow of and ras maintain a more even temperature.

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998 To Protect the Foundryman from Burns; Pouring La- dle with Sliding Wooden Handle SLIDING-GRIP FOUNDRY LADLE GUARDS HANDS FROM HEAT Equipped with a sliding wooden grip, t ladle used for skimming the slack from he user , enables t molten iron in foundries, to avoid discomfort and possible burns by having the hand too close to the metal. The handle is quickly adjusted to any po- sition and permits obtaining a firm hold. BULLETS LEAVE TRACK OF FIRE TO AID TARGET PRACTICE With bullets that leave a glowi1 ~ 1g mark to indicate their path, successful machine- gun practice has been conducted by army POPULAR MECHANICS units. The tracers showed the reb, ] as well as the path to the target, as j trated in the accompanying photogra; . > | ~ OIL WELLS TAMED BY CEMENT APPLIED BY NOVEL PROCESS Back of the vast oil industry lies a teresting story of a young man’s vi over one of the most perplexing probl of well construction, the task of props reinforcing the deep holes to support casing and keep out water. Credit for of the is given to Erle Palmer Halliburton, in th most effective ways of doing e last seven years, has patented m devices to simplify and improve engin ing methods in the oil ls and who | treated 12,000 wells without a single f ure. ~ | hele The feature of Halliburton’s sche is that he virtually “cure” itself. between the the casing makes the oil How to introduce cem: walls of the well a string of pipe from a quart: to a mile in length, often times present earth ing obstacles forbidding the mere pouri: of the material between the sides—was | problem. He devised two wooden plu One was forced into the casing and cement “slush” pumped on top of it. As weight increased, the plug slid down side the pipe and finally fell into the “de — Night Photograph of Target Practice with Glowing Bullets; Course of Projectiles to the Mark Is Plainly In- dicated and One Bullet Registered as It Glanced Away from the Surface

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POPULAR MECHANICS 1 } he hole of the cas- This cement to of t when ymottom is reached. ed the in upon the oil hich has the pe- characteristic of ng anv such in in. forcing the for- material upward he casing and earth. een t ills of the rising mass of ce- carried ahead of and between e mud water mulated pipe and the earth ntroduce the neces- juantity of cement klv, Halliburton in- combination { ted a p and cement mixe) four- that any- unted ona eel-drive truck taken ere about the oil ild be in all sorts of ther. A mechanical isuring device was o adapted to determine, to a fraction in inch, the exact quantity of cement had been forced between the casing he earth. VERTICAL-LIFT AUTO ELEVATOR SAVES GARAGE SPACE features are operated elevator for It requires Several desirable claimed an electrically epailring or servicing autos. special foundation and raises the car ertically, saving space. It may be stopped it any height desired, suspends the auto t four points and litts it by the axles, eaving the wheels ree. The hoist has capacity of 6,000 sounds, and may be raised to a height t four feet or low- ered to seven and one-half inches. Controls prevent iccidental drop- * the load. nine : Convenient Car on the Vertical Hoist Showing How It Stands in Position for Repairs Windmill Boat for Trip across the At- lantic; the Wheel Is Geared to a Small Propeller SMALL BOAT RUN BY WINDMILL BUILT TO CROSS ATLANTIC To cross the Atlantic in fifty days, or less, is the object of two English adven turers who propose to make the journey in a twelve-foot boat without steam, sails or oars. Propulsion will be afforded by a windmill geared to a propeller and the wheel is to be turned by the wind. QUARRY IS MADE INTO GARDEN AROUND CEMENT PLANT One of the sights in the suburbs of Victoria, B. C., is a limestone quarry changed into a lawn shrubs and gardens. As with rock an example of land- scape architecture, it well illustrates the possibilities of decorating commer- cial-plant grounds.

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1000 POPULAR MECHANICS which have 400-hor power engines. Its formance emphasizes fact that much of the cess power of big eng for planes is utilize carrying their own weis \ SAWDUST-CEMENT MIXTURE MAKES LIGHT LUMBER Chemically treated dust and cement + mixed together to for: material which is said t i weigh about half as mu as ordinary concrete, a better wearing surfa high fire-resistance insulation properties Nicknamed the “‘Flying Pencil’? Because of Its Unusual Streamlined Appear- ance, a New Light Plane Produced in England MIDGET HIGH-SPEED AIRPLANE HAS EIGHTY-HORSE MOTOR A plane with an engine of only eighty horsepower, yet capable of making 175 first trial in the recent King’s cup races in land. Designed by M i]. whose ships were standard the U. S. some years after the war, it is a low-wing miles an hour, was given its Eng- DeHavilland, equipment in army and air-mail service for monoplane, the wing being placed below the body instead of above it, as is the more common practice. Built to carry a single passenger, its appearance is unusual because of the way in which the streamlining of the body has been car- ried out, even the projecting head of the pilot being streamlinedthrough a projection taper- ing back to the tail. Because of this de- sign, the little craft is thirty to forty miles an hour faster than the British army's single-seat fighting planes. Rubber Speed Boat Carries Four Persons with Ease and Does Not Lose Its Buoyancy —— can be sawed, nailed di screw ed, and painted polished like wood. k is being successfully employed in precast th units for many purposes, and numerou i tests have showed that it has great stren, ¢ and durability in this form. SPEED BOAT MADE OF RUBBER WON’T GET WATER-LOGGED Successful tests are reported with all-rubber speed boat, the hull of which constructed of the introduce “rubber lumber,” devised especially This material consists « thin sheets of hard rubber with a cent: core of sponge rubber. recently airplane use. A fabric or met covering may be added if desired The boat was lined on the outside wit a soft-rubber cus! ion, fastened to the hull by a special process, to make it water-proof and re- sistant to shocks. Since the craft can- not become water- it has the advantage of logged, greater speed over boats of similar size, type and pow er.

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Radio Cabinet Table Built for Less Than Five Dollars By GABRIEL J. ISSAKOFF 'BSTANTIAL radio table, which be built for about $4.50, solves the of disposing of unsightly batteries A used: in this case white pine was employed and contributed to the low Any wood may be cost. Birch, poplar or hard- wood, although more ex- pensive, takes a_ better finish; lected, be clear whichever the stock thoroughly se- should seasoned, and straight- grained. The rough sizes of the may be obtained from the mil the dealer. material required local l or lumber Mark the various pieces to indicate their positions. Select best the surfaces Completed Cabinet Table teries in Position; Right, FRONT RAIL DOOR | . ~e 10% nt and Side Elevations vides an excellent ort for the set. It esigned along plain BOTTOM A SUPPORT RAIL 3* 4X 134) a ind the builder can own ingenuity in and ual stains and var- | being suitable, or the popular col- +71 cr iting finishing, of designs. Very and the dimen- lacquers and transfer tools are necessary, ns given may be varied to suit indi- ual requirements without change in general construction. The table illus- ted is 27 in. high, with a top measur- 15% by 26 in., which size will accom- late the average receiving set and bat- ries. The lower shelf provides space for oks and magazines, but may be omitted da stretcher or scroll design substituted desired. SHELF - * ——— 2 — a MORTISED “ | STRETCHER a A FRONT AND SIDE ELEVATION the avoid mis- takes, and lay to work for mark each out the Pieces like the stretchers and 1002, should be time. Lay for faces, from these sides only. fin- out, legs, shown ished at the clamping them together tails, notches and the first, tenons them chisel ; next, planing them true to size, laying all faces together, with on page same them similar de- Make the or like mortises. two stretchers laving out and cutting with saw the legs are ends even, and clamping them securely. 1001

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1002 POPULAR Mark the length and width for the blind mortises to fit the tenons on the ends of the tretche1 and also the notches to receive the bottom board for the cabinet. The two back legs have grooves, 4 by 4 in., to take the back panel. The shelf and corner-block details re shown on page 1003. lo bore the holes for the screws in the corner blocks, use a drill a trifle arger than the smooth shank of the The holes in the legs are drilled MECHANICS smaller than the threaded part screw; use washers, and soap thx threads before inserting. To fast cabinet top to the rails, bore sever on the inside « at an f the rails, as show: These hi h or so from tl sketch ver right. up] located inc 1e for the screws. To put on the bench, as slant down it face do the top, lay the shown in same place the rails in the proper positio1 if HOLES FOR__ _HOLES FOR VENTILATION } (¢ BATTERY CABLES a seven! Ti atessismecta. 4 : ;—+t t ; > t ww ’ BACK | MMR. F = =$ ic RAL | i} ty ca ‘ I Y Y 6-6 a G4 22 >) = BACK PANEL | ff i — L~ | @~«--/ } = = Se ——— x a y RA BACK ELEVATION NX "omen ——gl + f+ — §3”- “J — E> FRONT LEG, 2 REQ. pe z BACK RAIL, 3X25 X2Ig ~~. BACK PANEL ~. | - , - SIDE PANEL—-- END RAIL, 2X22 X 105 ~: CABINET TOP | Ny BOTTOM 7 ' 1 BN et a - a figeees __} CABINET i! J SX BOTTOM y FRONT RAIL, _-” LEG 2x12 xX 2y Ne o F = ) TOP VIEW OF CABINET i Pe SHOWING PANEL AND =_ a, RAIL ASSEMBLY ot METHOD OF JOINING BOTTOM TO LEGS

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POPULAR MECHANICS 1003 em to the underside of the top. yverlook the two supporting rails he cabinet bottom, as they help to e legs and add strength to the bottom. o doors, 1054 by 11% in., shown ront elevation on page 1001, may mented by grooves or carved de-

SCREWED BATTENS , =~ Se i

BOTTOM VIEW” OF GHELF --7 ? Above, Method of Drilling Holes for Screws to Fasten Cabinet Top to the Rails; Left, Details of Sheli of the color selected, and let it dry least 24 hours, then sand the surface. is best to try out the stain on a piece ol METHOD OF wood of the same kind as the cabinet FASTENING RAILS To .-sfirst, as some stains change their color LEGS OF EACH CORNER =n different woods. Use mahogany glaze color for the next coat, and let it dry f desired. Inexpensive “carved” overnight. Finish with fine sandpaper made of pressed wood, for the or rottenstone, and apply a number of lay be obtained from your local coats of any good standard varnish, sand etmaker and glued in the center of papering each coat a , irs, or if the lacquer finish is used, oughly dried. Fora dul i ter it has thor- | effect, rub down e transfer designs are very effective. the last coat with rottenstone, wipe care- lation holes and battery cable out- fully and apply furniture polish. hown at the

left on page . ae “11, ; MATERIAL LIST Rate of Drop in Idle ire drilled in Batteries ick panel of piece, 7 by 1534 by nies Mh j 7 is completed as- pong y Ay Ay ky 4h, Se Both dry and wet lv. The entire er blocks) piece of sheathing board, for rai ice should then dressed on two sides it should n ure 344 I down when per- 1 - 14 ) »6 F 1 one edge shou groo 4 ell sanded. For wy 2g dg nage Ege should be groov mitted to remain . ' i Tay as sw ° as or e who prefer the panels ) é idle. The ‘ piece, three-ply, %4-in. stock, } ; ‘ vood stain, the for panels. discharge is about ctions given in gg Pag tg by 2 in., for doo one-third that of the ‘ 09 agoz. i” VO at < woo screws ‘ . May, 1927, issue \%-in. square-head lag screws, 1. long, discharge when in ) s with four washers. . ; Po pu lar Me- small vena Gand door knob rews active use. B-bat- inics Magazine, l-in. brass or steel door hi door catches with plates batteries will run rate of teries are now page 842, can be stamped with a date lowed with good limit, like films, to ect. If a dark or red-mahogany finish is guarantee fresh stock, and the buver ired, use a good penetrating oil stain should look for this date to protect himself.

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1004 POPULAR MECHANICS Unit Ready for Use and with Front Removed; Right, Rec- tifying Unit About One-Half Actual Size gt ree ati a0 esti sot New Battery Charger Is Dry batterv charger using no vibrat- liquid is now available, the current being rectified through an electro- chemical process. With this type of charger, no hazard to rugs or woodwork is possible, as there is no acid to spill. The charger is so designed that the tubes are safe even if turned on when the charger is in operation. Only 234 in. wide, 534 in. long and 434 in. high, the charger fits into the battery compartment of the usual console. The rectifying ele- ment, shown in capsule form, is held in spring clips like a cartridge fuse and can be easily replaced. The rectifying unit is guaranteed by the manufacturer for 750 hours of full-load operation, or approximately one year’s service, while the transformer will last indefinitely. The charging rate is two amperes. Testing Transformers and Condensers Audio transformers and condensers can be most accurately tested with a _ volt- meter; the use of headphones for trans- former testing often leads to false im- pressions owing to the inductance be- tween two parts of a broken coil. Con- necting the voltmeter in series with a transformer winding and a B-battery, the reading will voltage beca winding. If no reading w and seconda which is not be determine and battery. cause a ¢ primary, due determine tl rez be lower than the use of the resistance there is a break in t] ill be obtained. The ry windings of a tran marked at the termi | by means of the vo The secondary windi: iter voltage drop th to its greater resistance: ie amount of charge denser is capable ot holding, conne condenser d charge the p nections and the condense deflection, \ back to zer indicates th ing capacity condenser fi irectly across a_ batte lates, remove the batter connect the voltmeter ‘r. The degree of the ne vhich will immediately » as the charge is dissipat e comparative charge-re of the condenser. To x a short circuit, connect voltmeter in series with the batte condenser t tion of the 1 denser. If erminals; a sustained 1eedle indicates a shorted the condenser is efficient needle will swing over and return to immediately Broadcasting Time Card Time and ing the usu; card shown RADIO :00 WGN trouble are saved by cond: il radio programs on the t in the illustration. A_ pic of cardbo PROGRAM about the 7:00 15 6 lla iE, aaah 30 WMAQ 30 card, is ru 45 WOJ 45 as shown 00 KYW 15 r y J . 8:00 WGN the time 8:15 " :30 WGN 8:30 - vided into 45 8:45 teen - minut :00 9:00 WMAQ_ intervals fri :15 :30 9:15 9:30 WOs 1 :00 p. m. 45 9:45 12:45 a. 60 WJJD 10:00 —. The featur 15 30 WGN 10:15 ome f _: | 10:30 CNRC _ you wisn 45 10:45 listen to 00 11:00 KFi___—s_ selected fri SU re ee ee of or ee] we Do Do DR [Ro el 15 WMAQ 11:15 2 - the news] 5:30 11:30 5:45 6:00 WLS 11:45 WSB._—s_s«perr:s prograt 12:00 _. andthe ca 6:15 12:15 WLW. lettérs 6:30 12:30 6:45 12:45 WDAF. tered on card oppostt the time given. The dial settings may b substituted for the call letters if desired.

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‘ 4 4 +] , 1927, Popular Mechanics loop Set Built In for | Cabinet Speaker Power Amplification, Simplicity of Control, Splendid Tone and Volume Make This Set Ideal for the Music Lover By FRANK L. BRITTIN MINATION of one of the new ex- ential horns, housed in a console suggested the installation shown There is ample room abinet for storage battery, charger mbination B-eliminator and power ‘r, and even with this, there is still hoto below. nt space for a compact three-tube The same general arrangement adapted to a phonograph console ed, or built up in separate units for h speakers of any type. In ing this.set no attempt was . obtain long-distance recep- t is simply a local broadcast employing only high-class ind devoted to tone quality, ity and simplicity of con- Easily adjusted from a er to volume sufficient to fill auditorium if desired, this for the music lover located nv of the large broad- stations lipped with “powerizer” ver amplification and Magazine B-elimination, and automatic relay switch- ing over to trickle charger when the set is turned off, it is practically an electric receiver, and as it is operated on a stand ard three-tap loop, the receiver is very and comparatively f local selective free from interference. The cir- similar to the one described 1926, been very popular with our readers and is especially suitable for this type of instal lation. The detailed wiring d gram and several photos show the and cuit is very in the Static December, issue which has extremely simple arrangement the various instruments on panel and subpanel. The wiri should be run as nearly possible like that shown Cabinet Set in Operation, Showing Ease of Control; Left, Receiver Removed from Cabinet dotted lines indicate flexible leads that are run below the sub panel, and which are taken directly from point to point in the actual wiring. The the diagram Che 1005

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1006 POPULAR MECHANICS sockets are of the spring-suspended type, inet, and provides ample room for and this is especially important at the de- trols. Either drum or standard tector tube. High-grade heavy a.f. trans- the .0005-mfd. variable condense: ee pret —_ fF: , ss PILOT LIGHT ON gs s< (T }4” DRUM DIAL FRONT PANEL, Jha qx 7 XI0z IL. SWITGH .0005 4,

X= CONNECT TO SPEAKER IF USED WiTH B-BATTERIES WITH ONE SPEAKER LEAD FROM POWERIZER CONNECT IN SERIES \ \\ BRACKET

22 AF. 201-A IF USED WITHOUT - POWERIZER ’ 4

| POWERIZER \— PLUG IN THIS SOCKET

LOOP SET FOR CABINET SPEAKER POPULAR MECHANICS MAGAZINE

formers are used, the filaments of the am- used; on the detailed wiring diagram pliner tubes being controlled by auto- drum-dial mount was omitted, to sim] matic units. The set is complete in every the lavout. However, the mounting way for use without powerizer, if desired, tails are shown at the upper left on and with standard B-batteries. 1008. The 50-mmf. midget condense: The front panel is mounted on the sub- the right is rotated by means of a panel by means of two angle brackets, knob and, when once set, needs very | and the entire set is supported inside the readjustment. The volume-control peaker cabinet on two black japanned vice, shown at the left, is optiona shelf brackets, screwed to the underside consists of a special variable resistat \t this point it will be well to explain t! if the set is to be used without the pow: to suit the builder. Assembling the in- izer and with standard B-batteries, struments the long way of the panel makes open-circuit jack may be mounted in t a neat appearance at the side of the cab- of the subpanel. The front-panel assem- bly is very simple, and may be arranged position occupied by the volume cont!

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POPULAR MECHANICS 1007 ls run from the P-post marked provided on both ends, and the extension e second amplifier-tube socket, may be made by means of extra double -post marked X, on the second former. They are soldered to terminals, and the speaker is in at the front. If an inside con-

rom the speaker is desired, the be taken to two extra binding ch may be mounted at any con- oint at the rear of the subpanel. ynbination power amplifier and itor is used, no extra leads are at the points marked X, as these ms are all automatically taken by the plug from the powerizer ich 1s plugged into the second socket, and the loud-speaker ns are taken directly from the er unit, as shown in the lower dia- n page 1008. In this case, note of the loud-speaker leads is cut volume-

device

Above, Side View, Showing Location of the Detector Tube ; and Loop Jacks; diffi- . Wil} Left, Rear View; ( F i] i Below, Front View » connect Cys f Panel is done, n extra 7 sz : J ; “hi screwed . =< he inside of ingle- : cabinet at

convenient These

used volume-control

unit for quick connection. he speaker lead from tl powerizer through the volume control run through to two holes drilled in the subpanel directly below the volume-con- trol unit, not shown in the detailed wiring diagram. The B-batterv cable terminates in bakelite lug mounted at the reat edge of the subpanel; each terminal connection is identified by a color corresponding to leads running to the va the colored wire rious batteries. Note that the A-negative and B-negative terminals of the lug are connected, and that an extra lead is taken to the positive of the 4'4-volt C-battery

from the same negative connection. The

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1008 POPULAR MECHANICS gative terminal of the 4'4-volt C-bat- neat arrangement of the contro! tery is connected to a flexible lead and bakelite panel is finished in imitati: taken to the two F-posts on the a.f. trans- nut so as to match the cabinet formers; this is the only connection in- as possible. dependent of the battery-cable lug. Indi- Mount the finished set on smal vidual binding posts may be used instead blocks and connect the A and B-h of the batterv cable and lug but the or powerizer a for a thorough test instruments are finally placed Carefully note the three loop jacks cabinet. he rear of the subpanel in the detailed builder will find this device very conven-_ the he detailed diagrams fo: ing these connections are shown ring diagram; the center loop jack must page; turn on the filament switi always be connected to the center lead place one tube of the 201-A type from the loop, or the set will not work socket in the set successively to te efficiently. The photos on page 1007 give filament circuit. If the tube light he reader a clear idea of what the finished _ rectly in each socket, it is safe to pr ie test. Then insert the tul photo of the front panel shows the — the detector and first voks like from various angles. The with tl a.t. sockets at rR >< Ux200-A_ /A.F TRANSFORMERS EG} UX . PYG 201-A

L.-AME VOLUME CONTROL OPTIONAL

B-BAT

p ~» VOLUME CONTROL — “a4 . TO LOUD ON. -IN SET (OPTIONAL — -~. SPEAKER e, TRICKLE CHARGER . A-BATTERY CONNECTIONS FOR DRY CELL B-BATS —_'

TO CONNECTION IN SET

PLUG IN LAST AUDIO SOCKET Ww Sgr--~ - | 3" a 4\5-V. C-BAT TO N10-V / ~ we { . ° oa 2 a AC.LINE a X16 310) HORN -B DET.AMP C-BAT. USED FOR BOTH DRY CELL UNITS OR POWERIZER

- VAR. RESISTANCE RECTRON 216 B) 316 B)

A- BATTERY

y POWERIZER UNIT - / COMBINATION B-ELIM. TRICKLE CHARGER QMBINATION BE Above, S hematic Diagram of Receiver Circuit; Below, Detailed Hookup with Combination Power Amplifier and B-Eliminator, Automatic Switch and Trickle Charger, All Controlled by Filament Switch on Front Panel

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POPULAR MECHANICS 1009

enal lead from the izer in the second a. -6-VOLT STORAGE BATTERY , SPEAKER , SHELF BRACKET ;°ET ewe method of fitti stations in strument panel when Mutton is net di MOLDING sets

do sO vou have familiarized vourselt operation ot the set. disconnect ‘ A prepare the ca ation The photo of ot the cabinet, with the back re-

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1010 POPULAR MECHANICS

top and brought out through slots. cut in chain-station programs in the large the back cover at the upper rear, to the Large lueprints of the diag? ims loop placed on top of the cabinet been prepared and may be obtained The finished installation is neat. efficient, Popular Mechanics Radio department and leaves little to be desired for the music E. Ontario st., Chicago, IIl., for 25 lover who insists on real tone quality and to cover postage age and packing. S; itished with the ‘al broadcast and blueprint No. 124.

} MATERIAL LIST | P ] Exact s midget ja ur lugs, Carte Yaxle | 7 a vile i Kets Ss} ] | ‘ in. she ickets tor } rour hea brass hine sc vs. 6 | ~~ 1 Re I long 1 R ymund-hea brass 1 screws l j l et R } Ha soldering lu round-hole t type ths ind t ¢ ) I } \ I . oO 2 . ; one : i « pieces n wa t t . I i | Ele l esis 1 long | 1 ¢ ¢ \ : 9) Aes ae ; ws SUGGESTED EQUIPMENT ate ‘ UX 201-A e lar ¢ OUTPUT the ptate of th

‘ | if an e condenset 7 | ee — plifier tube wl taken trom t! CONDENSER | Above, Completed the condenser kee ho placed on this a Filter howing As- it ou F the cneal e , | sembly; Below, Pic- tout of the speak

base he coil is Ko OUTPUT ~d | torial and Schematic thus protecting Wiring Diagrams then put on top of

windings.

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POPULAR MECHANICS Washington Apartment House Has a Neat Installation for 32 Aerials, Consisting of a Large Central Mast and a Number of Small Masts o Aerials on Apartment House to doing this in the average household so that the battery requires a_ regul her than have a maze of aerials criss- charge only at rare intervals. A little ob ing each other and running in all di- servation will enable the average set owne! ions, a neat installation of 32 aerials to select some lamp in the house that devised for a Washington apartment = greatly assist in keeping up the require use It consists of one large mast charge. When putting this plan in ope ted in the center of the roof and 32 ation, the charger is, of course, constant! ler ones at the edges, the aerials radi connected to the storage batte1 from the central mast. The lead-in res were, of course, attached to the ri iv i i : Small Electrically Driven Coil Winder ilals at the end near the short masts 1S installation has the advantage ot pre For the small manutacturet the col * 4 - a4 lar hawn 3 . } + ara)] > it er? ‘nting the aerials from touching each winder shown in the photo will be of con her.—Carlton Groat, The Dalles, Oreg siderable uti E : itv. It is driv rm: en b ¢ Nt lrickle Charge from Full-Current Charger aa ein lhe effect of a trickle charger for radio versal moto itteries is accomplished by connecting ordinary charger of full current rating of erate either o1 1 as the 2-amp type, to a circuit con- a.c. or d.c., an ining a lamp that is in definite periodic from 2,000 t ry needs; at least it comes near enough shafts, and is portable ) This lamp should be one that is 3,000 coils « rmally used a little while each dav, so be made in it the battery will be charging when- week by one er the lamp is in use; for example the operator. Various sizes of wire can be llar light, used each day during atten used, and the turns are counted automat on to the furnace and other jobs. Expe ically The speed can be varied by mean ence has shown that this gives the bat of a foot-operated rheostat The ent almost enough charge to meet ord machine is made ot bronze with steel

Page 136

1012 POPULAR MECHANICS SHIELDED UNITS FEATURE NEW INFRADYNE Efficient shielding and compact con-_ pletely inclosed copper box and the -truction make the new model of the in- struments are assembled in this box idvne receiver, shown in the accom- three-in-line condenser, three coil panving illustrations, of special interest. three sockets, with each stage isolat shielding, make up - assembly. These u with the necessary tul constitute two stage r.f. amplification and tector. The three-in condenser employs small balancing densers, by means which capacities int duced by the wiring tubes may be comp sated for at the time amplifier is put into s¢ ice. Referring to t center photo, we find infradyne amplii mounted at the re the base; this is the amplifier as that during the past ve has been described Above, Radio-Frequency fier and Detector Unit Rer from Copper Box; Right, C plete Assembly as Viewed from Above; Below, Installed in Me- tallic Cabinet Showing Compact Arrangement of Controls OS BAI RS CRY EP ORS AIP, LI A LLGES PBR. " y 4 See : "| previous issue, its ability to shary t tuning and to build up volu : without increasing background noises § ing well known to the home construct Back of the bronze panel carrying the strument controls is a pressed-steel pai = upon which are mounted the voltmet infradyne amplifier rheostat, two dru All units are supported on a pressed-steel dials and the oscillator-tuning condens hase, heavily enameled in black and _ Behind the drum dials, and supported drilled to accommodate all mounting the pressed-steel base, are the volume ‘screws and wiring. The shaft from the | sensitivity-control rheostats, connected left-hand drum dial extends into a com-_ spectively in the r.f. tube-filament circu

Page 137

POPULAR a blocking condenser, een the positive-B and negative-A in n series with ne-amplifier leads. These rheostats operated through extension shaits the front control panel. The tube two a.f. transformers and output former complete the assembly. The photo of the completed set in the tive sheet copper cabinet shows the rols grouped at the center. The finished in two-tone brown enamel, cab mounted on a decorative wooden \ll controls, except that for an an- compensator, are mounted on an ed bronze panel, set off in red enamel, he control knobs are of brown led bakelite. Power Sets Require Full Line Voltage Vhile the radio fan, having a usually pow ered that check with correct in assuming ne delivers 110 volts, a | a.c. voltmeter will often show that oltage is 100 volts or even less. The e of some power units to give satis- rs results may often be traced to de- ent line voltage. This is especially where transmission ire long and the voltage is not so ully ulated regulated as in the more thickly districts Handy Battery Tester e handy P a. tery tester ~S vn in the in- tended to be + oto 1s permanently onnected a mS a | ross the i torage bat- } tery terminals as } means of ie Oo special imps. When reading is ired, a push button on the side of the tmeter is pressed The scale is divided marked “Start Charg “OK” and “Stop Charging,” to three sections, respec vel) Battery tests are made when the turned off and when the charger is ot in operation. MECHANICS 1013 Tube Booster Works on B-Battery \ tube that will batteries of the radio set has recently made verv low tube on the rejuvenator of boost any type of PIGTAIL WIRE CONNECTED TO POSITIVE 2242-VOLTS --> CONNECT CONTACT PIN TO NEGATIVE TERMINAL mF its appearance on the market lube re ne il s thus mace lable to eve owner, regardless of the type ot lghti current in s distri Phe rene Ol-type tube take f irrent itteries than the average set us¢ our ot operation nd the 199-types r quire a st 1 ille1 it ( r nd simple device a ly usetu 1 to the life of the tube Cleaning Aerial Insulators Soot accumulation on aerial insulator should be removed at least once a e if good continuous reception is to be ex- pected They may be cleaned th ca bon tetrachloride Also, the connections should be tightened and resoldered if ne essary Phe slack in the aerial and lead-in wire should be taken up. since the weig] of the wire itself and the sway due to wind pressure wi!l gradually loosen any aerial Ps ] ‘ ¢ . er In time hese attentions may stations you have not \ Following Specifications Important Good results are seldom obtained by the tollows exact] : Che latter possible combina unless he specifications of the set builder designer has usually tried all the tions hetore he ] is ipproved 1 descrip 1 f - vhlicat ? “1 1] } y ion TOT publication a ( nee the set mav seem practi il, but thev tre quently interfere seriously vith proper some other point tunctioning at

Page 138

1014 POPULAR MECHANICS Loud Speaker Built in Globe Form be necessary to determine the correct by experiment, keeping in mind the fferent from the various types of loud of the battery being recharged. Al] now on the market, the instru sure that all batteries in a series are ‘nt shown — same size (capacity, not voltage). O1 in the photo’ wise,a charging current which woul 1 | damage a large heavy-duty battery ith the cause a small batterv to become set reproducing overheated Next, let the charging unit inside. A tinue for some time—even several map f the if the batteries are badly run dow: world is _ long-continued charge every few m printed on the will give better results than | outside and it charges at more frequent intervals is covered check the progress of the charge with a trans of course, not possible to take hyd parent finish eter readings as with storage batter which can _ Instead, voltmeter readings must be readily be lied on, and these should be taken cleaned with a moist cloth. It is claimed the charging current turned off. If t] that this speaker gives exceptionally good are not, the voltage of the charging « reproduction and good tone quality, be rent, not of the battery, will be s! sides its feature of utility. It is not claimed, of course, that dr —_ teries can be recharged as often as of the Storage tvpe \fter several Recharging Dry B-Batteries . the active material in the cell generally assumed th all becomes exhausted to ipossible irging 1 from been found times inv ordinary makes consumption of well worth while. Oscillator for Testing and Calibrating ignals at any wavelength from 20 meters can be radiated by meat the simple cillator sho Many ~hargers are equipped witha t LN ¥ in the acc for charging B-batteries and this c: . 7™ p: \ used with good results f such ne: F photo, is not available, one of the ! le elec * these c; trolvtic B-chargers ca be rigge in ned « tally : receiver at

precautions are necessary. the charging rate low, to prey I ‘ device is especially useful to service teries from | i which for neutralizing and calibrating receive h a cord and plug the active material and shorten their life. It is provided wit A current as small as from 40 to 5 i that it can be connected into a light « liamp. is usually satisfactory, though, if n cuit. There is no buzzer, and no batter means of measurement is at hand, it wil are required for its operation.

Page 139

An Electric Floor Scrubber By ARTHUR N. CAPRON necessary to do quite ubbing, the electric outfit the bottom, one rawing will be found to be red over the it convenience and labor saver. It The inside of th essentially of a metal casing of | inside of which a brus!] a 1 attached on ] ‘ket, which \ 1 -ATIS IT a Tad ) a pivot support for the handle a cast-iron sauce diameter and 6 in | ssi al Floor Cleaning Is an Electric-Driven Scrut Soapsuds over the Floor

Page 140

POPULAR — 7 i (° 29) | " (O)) 10 . ~ | ae ] | ty > ZY / | \ | @F 4 /Y Le- 37-1 ~ 6" a DETAIL OF BODY FILLER CAP ~ Constructional Details, Showing the Casing, Shaft, View permit attachment e scrubbing brus!] This consists of two yrdin loot brushes issembled a nad ted nd a pipe f] nge s ¢ ec on to ecure t inside of the pipe inge eamed out to make a sliding t on ¢ it nd a pit is driven throug! nee ! to | 1 the | t e et permit vertica VE ent. \ | ng and two washe S are pro\ cle on es itt to keep i down d pre ire ( 1 for ne? ig ns ¢ Ho eve spring ist not be s mg that it tend to raise the casing trom the floor. \ heavy ans le bracket. o he shape and size shown, is provided to hold the motor in position securely and furnish a sup- port tor the handle t is bolted or riv eted to the casing, so that the motor is located centrally over the shaft Phe end of the motor shaft is shaped to fi notched upper end of the brus! filler cap is also provided, as } through which a quart of poured for scrubbing. This out if the rubber facing even and tightly against floor. The brush, re volving against the surtace of the floor in the hot soapsuds, cleans it thoroug!] B moving the scrubber over the floor, the suds are carried along, and therefore very MECHANICS METHOD OF ASSEMBLING BRUSHES 4 Ob =——= Oo - i” - Pa ~ 2 -_ 5 ao SHAFT “a ga | ~ e STEEL BAND p~+-- SCREW --RUBBER 1 ee Sa SS Scrubbing Brushes and Motor Bracket, and an Inside of the Assembled Scrubber required can rem merely ti cotter pin. Receptacle Plate Protects Door Lock re = st siaeealt+ 4 ¢ I Is sometimes dimcult o open the pin-tumbler type if a few grair become have inside. to lodged likely imer cottages, by the winds. FLUSH-RECEPTACLE PLATE 11 S especially occu locks ¢ blown about m sul where san An ord Hush-receptac plate of the k shown inthe d1 ing, obtaina le any electric ‘" store, will] a : A elfective in Kee] ing dirt out of tl lock. Some tvpe of locks will pe mit fastening i | plate directly ) door while oth types necessitat the use of a blo of wood throu; which a hole drilled to fit over the lock, and on wl the plate is then screwed down.

Page 141

POPULAR MECHANICS 2educing Christmas-Fire Hazard sus accidents caused by Christmas- res could be avoided to a great ex- proper precautions were taken to the ornamental decorations fire- Cotton wool, in the majority of used to give the appearance of a overed floor and is also scattered ie tree. In its natural state it is a dangerous and highly inflammable il, but with proper treatment it can e reasonably safe for use. Make a n of % Ib. of alum to 2 qt. water, quantity of the same proportions. vater must be used to dissolve the when the solution has cooled, soak tton wool in it and hang it up to When it is quite dry horoughly. be pulled apart to renew its original ince. The solution can be used for decorations constructed of light ma- Tissue-p: iper ornaments can be practically fireproof by a solution of irts of ammonium sulphate, 4 parts icic acid, and approximately 3 parts mmon borax, with 100 parts of water e paper in the solution and carefull) original shape. Clean Milk-Pail Bottom clean milk pails and utensils well e endeavor of every good dairvmaid., fe ——-=e s) but when the milk- ng is done in the feed lot or in the pasture, the bot- tom of the pail often becomes so soiled that the vashing is a very disagreeable task. One farmer, how- ever, eliminated this trouble by ing the bottom half off a discarded feed ind using the upper portion in an in- to hold the milk pail. The forced into this holder ted position ter 1s gently the two cling together so that the be carried about without further at- ntion After the milking is finished the pail is emptied. a slight blow inst the side of the holder dislodges t—G, E. Hendrickson, Argyle, Wis. deceit Keg, Ornamented with Pebbles and Seashells, Makes an Artistic Dovecote Ornamental Dovecote \ highly artistic a i attractive dovecote av be seen in the park grounds ot t uni ZOO at Surabaya, Jay i the Dutch East Indies It is beautiful in pite of the fact that it constructed trom the cheapest kind of materi ind its cost was pract callv nothi except he ibor of the zoo keeper, who built it during his spare time. It « ts in old barrel having holes cut in it to permit the en rance of the birds, a wooden roof, a shelt nd a pede tal It Is Cf ed I ( lent ind covered with pebbles and seashel lt ould be a very simple matter to modit this form of construction for native w birds in this country, swallows, wrens, blue ake a rood squirrel private tractive oy reed s estates Lif I | Such weather-re a s, martins and others, + Ins and it w house 1: } . 1 tor pawft y ~ hose

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101 ar 5 POPULAR MECHANICS Canopy for Rumble Seat in Car loat is attached to the \ a rigid arm and closes the valve wh: pan is nearly filled—C. E. Weil: Syracuse, N. Y. \ person riding in the rumble seat of a roadster has no protection against the veather, unless a portable canvas canopy Corks in Mucilage Bottles Ordinary corks, in glue or mucil 4 1 Imes, so that the user does not put tles, stick badly after being remove: t cork in securely, with the result t] mucilage soon dries out The ti 1 can be avoided bv dipping the c fresh paraffin or tallow before rep in the bottle. If neither of the abo stances can be obtained, rub the cor] vaseline, which will have the same efi Homemade Canopy over Rumble Seat of Roadster but is more easily rubbed off thar Protects Occupant from Weather affin or tallow and is also object of the kind shown in the photo is pro- because it is greasy. This kink \ vided. This is a homemade affair and M™any a bottle of mucilage. consists of a set of pipe and fittings, whic is tastened to the car securely, the canopy Oiling the Auto Springs being attached to it r | 1; ; When the oiling of the auto spr neglected, squeaks and chirps soon Windshield Warmer velop, and the riding qualities of tl t i ‘ 1 suffer Overoiling, on th t] \ length ot flexib e met i] tubing, led el. veroliineg on i otnet ; he } | Pat ’ brings conditions that Ircm the heater to the portion of the wind- ae a a iat al ae ; co and, in any event, the shield just ahead of the steering wheel I ; . a / springs is an awkwar will deflect the heat entering the car so 2 , device shown in that ice on the outside of the windshield : 7 ies - : , makes the task will melt, and, with the aid of the auto ° 1 ' ° a a ‘ Oll to the pring matic wiper, the glass in front of the driver ' ' , ' to make them can be kept clear, even during sleet and , ap ; ar ride easily Ireezing rain. Che tube can be perma- . - ind to keep nently installed, as the deflection of the , a, ae ae ee down the warm air does not make any appreciable hema ay RE squeaks. It ditterence in warming the car. p consists Of a few turns ot Automatic Valve Fills Water Pan felt wound ’ o£ . around the Most hot-air furnaces are equipped with ound the spring, near +] a water pan for adding moisture to the he end, as in- dry, hot air. Usually it is necessary to refill this box every day as the water evap- dicated, and orates quite rapidly. To eliminate the tastened in trouble of do- ing this, one home owner felt is soaked with oil once ws veeks or oftener. depending on the wu place with vire ties. The installed an , ordinary float of the car and the weather conditions valve on the —— pan; as soon QA little fresh developer added occasio iS t] e water drops to a certain level the Vv to old developing solutions will bri valvé opens, and the pan is filled automati- them up in speed and intensity.

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raw the light 1 ‘hind, push the POPULAR MECHANICS laming Beacon for Night Skaters will be found useful for or coasting parties, as it is easily beacon ibout and will give light for a long z Sb -BABY-CAB WH s NS BABY-CAB EEL HANDLE —% FLAT IRON ad rx, wr ND~ / SA vy se MOUNTED ON SLED RUNNERS 1019 runners can be used instead of wheels. These can be made of light in. thick, 4 or 5 in. long. 1 in. material, | 2 14 in. axle wide and about Drill holes for the ends of the from the top and 2 in. ahead of the 1 Can Have Much More Enjoyment from Skating or Coasting at Night, If You Provide Yourself with a Flaming Beacon to Give Light When it will the coasting for miles. It sts of two wheels with a metal can inted midway the axle that sup- ts them. The handle is fashioned from of flat iron with a rod handle set through If desired, on of double set on top ot cast its beams on engths or the only one length of length, e middle, can be holes in end. bent sharply used. Besides the o wheels, such as can be salvaged an old babv cab, are needed, together the axle. Holes are punched throug! I ide of he middle through them. \fter ] I above he axle is run ng the ends of the hs of iron, fit over the axle, drill the engt front end insert the handle. If the holes at the - end are a tight fit, the “pinch” ndle at that point urely. Before on the hold it in place starting out, fill the n with dry sand and pour over it some “49 Wil rosene to which mall amount of oline has been ded. When it is it ed, the beacon burn for sev- hours. When ing the wind, be- d you and, if the ] , nd comes trom | x rht in front of u If desired, side of a SS Easily Made Wire Hat Hangers Attached to the Under- Closet center, and the runners will ride rough spots with ease—Dale R. Van Horn, Wal ton, Nebr. Restoring Tone Quality of Violin A novel method of quickly restoring the tone quality of a violin, which has become sluggish and impaired in this respect, due to long periods of disuse, consists in plac ing the instrument th its sound holes 1 close proximity to a radio loud speake It has been found that new violins can be Hat Hangers for the Closet Shelf In closets where the space is limited ‘le device can be used to keep hats in ice and entirely out ot the way it e . 4 ’ 1 I> made oO! No. 10 gaivanized-iron wire 1 cn Ss pent o the shape shown ntne dra ing, Tt ) , € De€ Yr pro vided at the ends, a indicated. The h nee S a | Ta side of a shelf with VV FLT hrough the eves. A } Z number ¢ thes nee can be Shelf

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1020 rd Motor Connected to a Small Rotary Pump Removes Water from Flooded Basement Outboard Motor Removes Water from Flooded Basement a water main, } dent of an eastern town found his } | ) basement fl l t : I I carly Z | ‘r the he prob | motor and a borrowed from a iear-by supply house heavy plank was piked acré short dis- | tance above Was Cl removed position he propeller was from the driving shaft and the latter was fitted to a piece Ot pipe, about . 3: long lh, ] in which holes were drilled and tapped tor two setscrews. rhe pulley was removed from ind the pump was 1 haft the pump shalt 1 bolted to a heavy piece of timber, which 1 was blocked up from the the cellar floor until line with The with a and the motor were thoroughly braced in all direc- tions so that they could not work rhe with a bilge strainer shaft came in shatt on the pump exact the propeller motor. then clamped together pipe coupling. Che wo were blocking out of line by vibrati intake hose was fitted houseowner which the had on ind, although any ( ther strainer could be used for this pur- and, when Ose, Che motor was started, POPULAR MECHANICS thoroughly warmed up, its speed w duced to 300 r.p.m. so that the pump The water intake « motor was piped to the bottom work efficiently. cellar by means of a rubber hose the motor would be kept cool at all The discharge hose was led overhe i it to the water was discharged beams with cord, through a where it flowed down a grade. The carried off the fumes This outfit did the work in days, with only thi . adjustments of the 1 window also Holes Punched in New Overshoes When you buy a pair of galoshe overshoes at a price lower than usual vou find a hole punched in the ba the upper part, the article has some this manufacture fect. By method goods, who make galoshes rubber their tomers of the quality of the product such other rubber footwear, intorm goods containing minor defect manutacture are designated as “sec: by the hole ; -, 7 H fa * hicago ~ Instructing Beginners to Operate Autos For use in | instructing beginners to operate auto- mobiles, the follow ing idea is of much as- and tance Sis enables the in- structor to ac- quire control of the car quickly and completely,as, for example, the pu- pil becomes when and the accelerator instead of the The tory, the ignition being automaticall off, driv e confused steps on happens drawing releasing unnecessary stral and soon as - emergency brake lever is pulled back. svstem brakes, as

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all the hipbuilder, Donald McKay, Cloud” According to rr of “The Mar McKay itime usetts,” design, clippers built by that master was considered the Samuel E. “built but for perfectionand C Minturn Train Her deck, & ‘O. regretted “F] nota- the most Morrison, History V- 40) 8 depth; ft. in. ot Mas- registered faster clippers commander was ressy /({ dimensions Ww bre New for ere Cc therliness and istent speed eT con- he everyv ion, neither else the ‘loud.’ the fast on long that ever under the n flag.” very name eathes the spirit the golden age and her endures en in this ir anyone rpassed lving ¢ he was vessel vages ed merica sail, time age of SHIP-MODEL PRIZES EW hobbies enable the amateur such beautiful work with so few tools and such inexpensive material as ship-model build- ing To encourage such a worth-while and pleasant pastime, Popular Mechanics Magazine offers the following awards for the best models of the ‘‘Flying Cloud’’ made from plans pub- lished in this and subsequent issues First, $100 cash and gold medal Second, $50 cash and silver medal. Third, $25 cash and bronze medal. Five awards, $10 cash and bronze medal. Five awards, $5 cash and bronze medal. Bronze medals also will be awarded for cellence in workmanship. The contest is open to everyone, regardless of age or sex. The conditions are very simple, and full details will be supplied to every reader addressing the Editor, Amateur Mechanics de- partment, Popular Mechanics Magazine, 200 E Ontari Chicago. to prod uce ex- st , pronounces the rest re 229 it -adth tonnage j age. ended, Ho maiden Bef she had tablished record vovag e Francisco davs, once by 1854, h and »T a to nev the ersel once the “Andrew 1860 son” in team and oil. Built for McKay’s friend, e was sold the on stocks Train, made Enoch to Grinnell, 1,256 miles in four ) this 374 miles, consecutive VOV i and e J ic]

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POPULAR MECHANICS CARVED OUT) Fic.3 SAME WIDTH AS OPENING / CARVED IN DECK LIFT | ! ! | ! ! ' { FOC'SLE-HEAD LIFT Fic. 4 | ¢ ‘DECK ler AFTER GLUING AND CARVING Fic. 5 LIFTS iT04 ALL LIFTS 7 SIZE Cmaten OF ORIGINAL Fic. 1 Quarter-Size Drawings for Making Hull, Deck, Quarterdeck and Fo’c’sle Term>plz

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POPULAR MECHANICS other clipper, except, perhaps, the English “Cutty Sark,” makes such ‘al to the imagination, and this was Fig. 6, Assembly of Lifts; Fig. 7, Glued-Up Hull Fig. 8, Carving Corners off Hull with Chisel; Fig 9, Testing Hull Contour with Body Mold Arrangements have been made with reason “Flving Cloud” was selected as well-known firm of ship-model supply subject of our model. Vhile there is a great deal more detail model of a clipper than in our previous lel of Hudson’s “Half Moon,” the con- the reader time and trouble in assemb! uction is not a bit more difficult. Ow- makers to furnish a complete set of parts for building the model. in order to to the character of the ship, the detail he deck fittings, etc., is finer, and the ller parts must be made with more this, however, does not demand re skill, but merely a little more pa nee. The method of building up and ing the hull is exactly the same as ith the “Half Moon,” with the exception it, as the lines are finer, body molds or mplates are employ ed to insure that they ll be correct. Marking Off One of the Lifts from the Wrapping-Paper Template

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1024 POPULAR MECHANICS TOP LINE OF “4 TEMPLATES i} { Y igelis\\6 \i7 \ BODY PLAN (FULL SIZE) fe > Z ) SHAPE OF STERN AND RUDDER (FULL SIZE) FiG.10 STEM, (FULL SIZE) Full-Size Drawings for Making Body Molds, Stem and Stern Templates

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ee Lit t a POPULAR MECHANICS 1025 Fig. 11, Finishing Stern with Spokeshave Fig Sighting for Smooth Curves; Fig. 13, Ster: ing Knuckle Line; Fig. 14, Partly Carved These will include lifts cut to in Fig. 1. The drawit for the pe, wood for bulwarks, deck fittings, therein are exactly one-fourth rough blocks and deadeyes, anchors, of the original, so, taking lift N capstans, etc. Fullinformation about an example, measure with a pa ese sets will be furnished on request. viders the distance from the center e first step in making the model is to the curved line representing th lay out the templates for the lifts, or edge of the lift, along line No. 1 s, that are glued together in “bread- this distance off four times along lit butter” fashion to form the rough 1 on the wrapping paper Do the l. Get some sheets of stout brown with lines Nos. 2, 3, and so on. unt pping paper, 30 in. long, and cut it into have a series of points on. the ips, 8 in. wide. Draw a line down the’ through which a smooth curve enter of each strip and erect perpendicu drawn, and which will look exact rs to this line all along its leneth, 1% same as litt No. Sin Fig. 1, but apart. Number these from 1 to 21, as the size. Use a French curve in 12, Show- Hull

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1026 POPULAR the line through the points marked, and make the curve “easy” from end to end. Now fold the wrapping paper exactly along the center line and cut through the doubled paper along the curved line. When cut and opened, you will have a les iy out the remain- 1 S1¢ template for lift No. 8 on which both L: n the same manner. with will be exactly alike. ing templates 1 1 to 4 center line, to save space, and 5 to 9 are Tem- plates are shown a common separated, to avoid confusion in measur- Ins Mark the exact position of line No 11 on all templates, squaring a line right across the paper. The templates will be found to fold easily along e center line f the rounde: of a pair of scissors 1 point drawn along the line before the paper ; removed from the board for cutting. The lines given are for lifts “6 in. thick here are eight oO! these and one dec] ift 146 in. thick. It practically as sat sfactor to make the lowet lifts by) n hick 1 to cut only four of them, and tl done, template eed only be 1ade-for lifts } 2,4,6and8. In some Ls C1 be « r to get lumber planed to %s-in. thickness and in othe s-in. lu yer, so lines for bot thicknesses are given here Make template to the quartet deck and fo’c’sle (forecastle) in the same WaV as for the others Mark ill tem plates for bow and stern n Fig. 1 the bow ends of all lifts are at the top of the page. In order to simplify the construction blueprint have been prepared fiving the lines full size. These may be obtained, at 50 cents for the set of three. from the Amateur Mechanic Mec] department, Populat lanics Ie Magazine 2 Ontario st umber used for the hull lifts 1 white pine or sugar pine 4. or ww in thick, well seasoned and free from knot Eight pieces of the ™16-in. size or four of the mn ll be require 7 in. long and one piece, 16 in. t k d 29 in long, for the deck lift A] t piece of in ne. Y in. long the quarter- deck one piece by 4 by 5 in., for the fo’ le | \1] pie except the last, are 6 if It is ¢ cult to give an exact n I list for »b of this kind, since so many of the smaller fitting are made from scraps. For example, the MECHANICS keel, stem, and ruddet original model were ripped from a sternpost piece of birch chair rail, and the bul were cut out of the scrap left over the deck lift. The templates having been made No. 1, or No. 2, as the case may pin it down on one of the boards, ing it so that it lies flat, around the edge as in Fig. 2, the curves on the board. Transfer center lines to the board Do same with all lifts, then cut them out De then run “ to la also. a compass saw, fretsaw or frame convenient, cutting just outside the After sawing, clamp the lifts in the individually, and trim them down t Mark the that tl hen g mark the center line down the middl each end and line No. 11] ach pie e at the proper plac line with a spokeshave. 1 stern on all pieces, become S© i¢ vt luing re\ ersed + it square e 11 is after this called station N« 1] lines at right angles to the center lifts are stations. Cut a notch, Z in. wide, out of the center of th: ward edge of the quarterdeck, as in Fi Lay lift No. 8 down on the bencl the center marks uppermost, coat NY 4 + side, and the plain side of No. 7, set No. 7 the lower ] in position by mean and with station ] station 11 on No. 8. Fig. ina couple of short brads to keep the ft shifting, and and other lifts in the same fashion. to fas sembly is complete, clamp it f on one, lining 1 s of the center 1 (See 0.) set all You When the 1 rm om glue t if have work here. to force all the lifts into good contact 4 1 set aside for nours to set. e€ before gluing, the lifts can all be bled and drilled for two ™%-in. dowe indicated in Fig. 6 This makes it e to assemble the lift vhen gluing, but dowels must be a trifle shorter than combined height of the lif or the interfere with the clamping lf enough clamps are not at hand to t in all the lifts at once, the hull may glued up in two or more sections p lav the deck lift flat on a board or on bench, mark the position of each sta on the edges, and with a pair of and measuring from the bottom e l on No. 7 exactly o Dr ° | divider re

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rements given in Fig. 15.

1 that lav off al

POPULAR the sheer line from the 5 The pos- behind some of the figures in “just a hair” measurement the distance is 1 the viven, and MECHANICS the edge of the toc sle, end of the deck, and c¢ ] marks as shown in place temporarily placing it according to

itive ign behind others that the and mark the curve of ‘e is a trifle (not quite ‘us in.) less. from the dimensions given at stations 1, her words, one measurement is 2and 3 in Fig. 15. Cut the deck down to 1 “ ” “ 1 . ‘ 9 the other “scant.” Lay off all this line, then carve out the underside to TOP OF DECK ; QUARTER DECK ——> LIFT FOCSLE LIFT — When the glu é ce I tiie JOINT OF STEM JOINT OF STERN POST hentia - oo 1 from sta AND KEEL AND KEEL vine the deci i. tn ees $ fora « tance ot remainae IT the ° “Z ‘ it this point draw Sb ] ( n 14] ] } ( } l¢ to the upper ? .. lK« é i r the itt on each \ \ ike up et nd connect the two Fic. 16 od templates « rene ie drawn I 1 the bod al I " 23 ° Lea ) + + icross the Itt his represents the e line n in represel ve OT the toc Sle \ Saw cutis made each section otf the uid this line to meet the sheer line, then t ere sliced like O re it e nder of the lift is cut away, with . t Ine Lhe ne on the left re ¢ t nd dt iwl 11T€ down to the sheer ectiol ot the ] Vic ed tiie Leave the deck “crowned,” or \% in. tern; those on the oht, se 1 ce along the center line than at the nd viewed é ‘ ce eacl ( Square and smooth the after e1 sep ely on a piece of stout bristol b ift and glue on the quarterdeck ea P p the cut out carefu thicknes lo make a good joint the cur f 1 ‘ é 1) the two. | " sheet ot san ly TY ‘ e1 ‘ »> hel 1 edi ¢ > ] ' . y the + 7 anil ] } oO Q Lose e side up. ove the iiter € oO 3 ) , o | ce the quarterdeck ( r t] O l ¢ cut O! eT 1 move it back and to ved ¢ t ( n the ¢ ) e abrasive until the underside of » the bottor of the kee then t uarterdeck fits the deck perfectly the center of the kee ind cut of t it the station marks on the quarter oint. Note the n the photo, I aitats af ‘aes - 7 MT ca ‘ 1 ne up with the corre ponding nes / Yu r¢€ ¢ mo they, re ¢ deck a hen gluing. as indicate ] nd « if \ Ix¢ t¢ 1 tem ite ro the

——o

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1028 POPULAR the for tl sternpost, and one le sternpost. Cut a temporary stem and sternpost out of ‘M6-in. wood, and carve and file the stern and bow of the model until the stem “Crowning” the Surface of the Fo’c’sle Deck; Note Improvised Cradle Holding Hull and sternpost fit correctly, then cut a tem porary keel from ‘46 by in. wood and tack all in place These pieces help a lot in carving the hull, and the reason tor using temporary ones is that, in carving near the ends, it is almost impossible to avoid digging slightly into the stem ind sternpost, so that if permanent pieces were fitted they would be badly marred. Mark the station points on the keel and stem, where station 1 runs through the latter, then fasten a block to the deck bv means of a couple of screws, so that the hull can be held in the vise while carving, and you are ready for the next operation When drilling the screw holes in the hold- ing block, place these so that one screw will come 5% in. from the forward edge of the quarterdeck and the other the same distance aft of the edge of the fo’e’sle head, on the center line of the deck In this position, the screw holes in the deck will afterwar } covered by deck erec- tions, so they will not have to be filled. Now, starting at station 11, begin carv- ing the hull down to the outline given by MECHANICS mold 11. Che corners of the lifts « carved off with the chisel, but whe: contour of the hull begins to app: that of the mold, it is weil to supple: the chisel with a small spokeshave, Always one or two molds ahead of the statio1 finishing; that when 11, and carving toward the carve stations 10 and 9 roughly to This helps to indicate the in the hull. Also, be to keep the mold, when trying it aga the hull, as in Fig. 9, exactly at right gles to th take a very fine shaving. are is, workin station also. of the curves e center line of the hull, not right angles to the hull surface. Proc: ing from the center station to the e: ach station point until the for that particular station fits exactl) the curves of the hull, when viewed f: in Fig. 12, true, showing no humps or hollows carve e any angle, as are “sweet particularly careful when carving at and stern. The bow on this ship ha pronounced flare or outward curve if the carver is not careful at this pi there is a tendency to destroy the shape of the fo’c’sle deck. Also, at stern, you will notice that mold 21 fi outward from the keel until it meet molding; from there it runs up in an most straight line to the deck. The where the curve changes is called “knuckle,” and the way it looks wil ? carved is shown in Fig. 13. knuckle to tl midway between stations 20 and 21 on From t a point ab 1e deck, from side, right around to the same point the other side, this part of the hull is p: tically straight in the though the of changes rapidly as it approaches the ster: in vertical plane, angle the straight p when it becomes as shown in the ste template, Fig. 10. The knuckle sho as a decided line all around the stern, { lowing the line of the deck, and abo M46 in. below it. “Fair up” all the cury in the hull with spokeshave and sai paper, until they are sweet and sweepi! when viewed from any angle. A mold not shown for station 12, to avoid cot fusion in the drawing, but the change section from 11 to 13 is slight, and tl hull is easily carved by eve at this point Now drill a the bowsprit, at the angle %4e-in. hole in the bow 1 indicated b

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POPULAR MECHANICS 1029 rn of the stem; drill this about 2 in Make a permanent stem, keel and post from ‘“4e6-in. birch or similar ood, glue and pin these in place indpaper them, but do not take too off the sharp edges. Leave the rud- intil later. To be continued) thing Diamonds to Check Yellow Tinge liamond expert claims to have dis- red a method of checking the discol- mn of diamonds during storage, the of the treatment being less than 5 per hundred stones. They are im- ed in any solution of a blue tint, h is the complementary color of the : Strap Attached to Coach Seat Prevents Occupant from vel ow tinge of a diamond. rhe Falling Out, if Door Is Opened Suddenly f this immersion is that a thin film lue coloring matter adheres to the Leather Strap Adds Safety Feature ind quene hes the vellow light, mak to Coach-Type Auto e gem look as if it were of the first , : : ‘ Le er straps piaced on the tront ¢ When the gem is required for sale, h-tv1 re al ot a coacn type « se ire } necessary to bring back the na tave in holding the occupant in the se rol tO wash the tone in ciean e door is sudden opener The « : ee inne t nm arv i “are | )} } te l then dry it carefully. | ng shows how the strap is arranged. Ii jihad ove clhiohtie Atenntate Fen ; , = at are ightly discolored after t is fitted with a buckle, it vossible to 7 7 rn for some time can also be 1m- Riagh tapas tilt the seat back tor the most convenient y Ul reatn te position of the occupant Che strap should be of strong leather, and the end Weights for Window Curtains ners Wee Weenere = --~. \ strong , - : ~ Lid for Electric Toaster Stove Ny b r S a Z © y Cee 1 through an Electric toaster stoves of the kind shov poopie) Ap open window in the photo have many kitchen uses, but ere’ frequently the heat cannot easily be controlled [t i 7 causes dam- is often necessarv to keep the contents of age to expen- a pan simmering and tor these occasions | sive curtains keep a large tea can lid handy Plac ng this by whipping on the stove ama them about ind the pan on the sills on the top ot until they be- it, I find that come badly it acts much soiledand per like a stove | haps frayed. lid over an One house- open fire, giv wife has elim- ing just the ted this trouble by providing weights right heat for old the curtains down. A small chain, islow simmet into the lower hem, allows the cur- —Nellie May | to drape as usual but is heavy enough Moore, Ham | | revent whipping about in a stiff wind | ilton, Can. —

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12 L030 POPULAR GREEN CELLULOID», / STRIP SEWED ON BAND AND SLITTED FOR BUTTON of Green Celluloid Glare Shield for the in Cap Makes Good Anti- Motorist Piece Anti-Glare Cap for Motorists Instead of having a separate pair of goggles to wear as a glare protector at night, the motorist will welcome the idea shown in the illustration, where the gog gles are incorporated in the cap and, there- fore, always at hand Cut } the cap just above the visor out a piece of and replace this with a piece of green celluloid. Of 1 course, the cap must be large enough to = permit this. The band of the cap is cut and a button and buttonhole are pro- vided, as indicated When the goggles the button and pull the cap over the eves so that you can through the celluloid—William C Thomas, Chicago, III. are needed, simply loosen see Protecting Young Trees During the fall and winter months, it is necessary to put protectors around young fruit be made at little work, by getting a trees. A very good protection can ind with large Russian almost no cost ver\ thistle, and placing it around the base of tree. With the t a little twine the thistle will prove to be a superior It will keep the the young use Ol a all-purpose protection. rabbits away and the the haded feventing the continnal shaded, preventing the continual thawing and freezing which kills so many bod of tree thus MECHANICS young fruit trees throughout the ce: west every winter. If the Russian tl does not grow wild in your section o{ country, as it does in the west, you find that it is very profitable to rai few of them in your yard. They are Another vantage gained by using this protect that, if it is not taken off from the in the spring, it makes an excellent mu and prevents the ground from _ baki around the roots. life-savers for young trees. Kink for Fishermen Game fish usually bite best when surface of the water is somewhat However, under such chor often rou conditions the This is for c. of due, not to the direct the wind to the pitching or “bobbing” of the 1 of the boat, giving intermittent but po 1 jerks to the drags. much ful anchor rope and connecting the anchor along the bottom. ble can be prevented by or 4-ft. strip of rubber. cut from inner tube. between the boat and the of the anchor rope. Cleaning Out. Toothpaste Tubes Everything from toothpaste to st polish seems to be handily put up in tul Quite often it is necessary to get all of the when we short. To do this effectively, stick the e1 contents of a tube of the tube between the legs of a clothe pin and turn it. The fingers can tight Using a Clothespin to Squeeze Out the Contents Toothpaste or Other Tube the tube as it winds uy When you get to the end, the contents o the tube will be entirely removed. press and follow

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POPULAR MECHANICS Omaha Garage Man Sets Up Useful and Novel Fence Consisting of Discarded Automobile Wheels, Painted White and Red, to Guard against Accidents at Ditch Fence Made from Old Auto Wheels the. paper. The paper, of course, is after- ] . ward cut an sed as a template.—Charles Guards Deep Ditch i ™ cut at d u eda a templat I. Reid, New York City. O protect motorists from accidentally en king into a deep ditch just beyond his Cork Keeps Hook from Marring ing place, an Omaha garage man pro- bpiges 4g Screen Door fence made from old auto wheels shown in the accompanying photo. Be- When screen-door hooks drop down es being useful, the fence is novel and they often mar the paint ot the door, and attracted much notice. The wheels gradually cut dis- ere taken from a junk pile and the spokes igur ere painted white, while the centers and in the wood. To s were in bright red. The wheels were prevent this, force ing grooves ld in place by the upper and lower rails a thin cork from 1 ‘ . . 7 ] ] —T, the tence over which the rims of the a pop-bottle cap heels fit snugly—Geo. R. Harrison, over the hook, as Counzil Bluffs, Iowa. shown in the a ccompanyin + photo. The cork will prevent tl Shelves for Odd Corners - Shelves for odd corners may be accu- metal trom touch- rately fitted by following the method ing the door own in the drawing. A small board, ++) th a_ sheet oe some time ago the radiator on 1 ( e as ‘ ‘ 1 7 sprang a bad eCak ere the horn re paper fa tened to it by cans oO! ] ‘ ‘ * . umbtacks passed through it As it was nec¢ ry to held in the use the car immediately, a temporary re yrnet \ A pair had to be made. he leak was quite Pils M ‘i large, but a white potato, cut to fit around é " ah . ‘ ° ; AI the hole, and a wooden brace, propped uy ood, having n ¢ nd Sees ans 1 +] tents Inne anne ea G against it, stopped the leat ong ¢ yuu unted and a hole through it, as shown, is to drive three miles to a garage ed to trace the contour of the corner on H. Buckley, Philadelphia, |

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1032 Sled for Narrow Track Has Single Runner When we the cousins a mile away, it wanted to visit our aunt and Was necessary to go through a woods. During the win- € One-Runner Sled Solves the Problem of Transporting Children over Narrow Forest Path er months there ua 1 single path Oo ilk Over, but Oo two tie @iris ere too small to walk the entire istance Phe use ol regular sled was also impossible as the path was too narrow, and therefore [ made a single-runner “ski-boggan” as shown in the photo Both youngsters could be comfortably seated in it, and the sled was held securely by means of a han dle rigidly attached to the body.—J. J Brindos, International Falls, Minn Some Dry-Cleaning Tricks Often, when cleaning, it will be found that the color of a material will be slightly lightened. If the bleaching is not too uoticeable, the color may be restored by rubbing the fabric with a piece of clot] barely moistened with neat’s-foot, cotton seed or olive oil. Before brushing over the light spot, rub the moistened clot! | another cloth several times to remove most of the oul. This is done Liter t! dry-cleaning process, and must be repeat each 1e the garment is cleaned lo g crepes and other silk materials new luste dip them in carbon tetrachloride, or gas 4 ‘ . ning + or Oo drops ol line contai above oils. Tl] also done after they have been cleaned generall) the finger nail or rub- edges gently with POPULAR MECHANICS one or tne Water stains on silks can be removed bv scraping the stiff bru as a new toothbrus \. T. Bawden, Belton, Tex. bing carefully with a rather such, for instance, How to Prevent a Frozen Oil Pum; Water forms in the crankshaft case automobile motors through condensati: _ ‘he inside of the case warms up before t outside, thus creating small drops of m: on . ° ’ - ture. This moisture naturally flows the lowest point in the crankcase, whi is around the oil-pump mechanism. Th: the pump freezes every cold night, whi ’ means grave danger to the motor or « pense and bother to thaw it out, To re: edy the trouble, pour two tablespoonfu f of wood alcohol into the crankcase eve : ? two weeks in the winter time. The alk hol will not mix with the oil nor imp 1 its efficiency. It simply sinks to the b tom of the crankcase, where it mixes the water and prevents it from freezi: This is the only practical solution to oil-pump freezing problem that I | » across.—Rolla H. Waffle, W Wasl . Grease Cup Helps Prime Vacuum Tank : When the vacuum tank is drained or tl fuel supply is exhausted, difficulty is some times exper : — enced in prit WASHER ing the tanl but by subst tuting a sm grease cup f the pipe plu at the top, tl difficulty car readily | overcome. A the hole in t! top of thetanl is tapped wit! a W%-in. pip tap, the grea cup is easil screwed o1 [t is to pour in gasoline without Washington, D. then Luers, pilling.—G. A @ An ordinary curling iron makes a good finger stretcher for kid gloves.

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BY HERBERT C. MEKAY \ OY, that will be ungsters, is the in the illustration entially of a cart, I‘ ” - ————+f bi r oe ——- bea alll el Sie HOLES HOLES -- bling Head over Heels As Cart Is Pulled Along, the Offers Constant Amuse- ment to the Youngsters eo lich are belted toa supported on the e of the cart, a den figure resem- tumbling bel | bling a clown being mounted on the clown swings he The clown body, in. wood according BAR-DRIVE WHEELS MAIN DRIVE WHEELS

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e ¢ thc t I ( i ene? fioriy Meu 1S ( the C 1 t e1 1t it POPULAR lancine tor power to turn out of clo é S e ( tal pre | > I ¢ ¢ ITO?! 1 bout e ire 1 +] ] e ’ ) alance litre some- vet at . ¢ l¢ tne exac point . t 7 Vy ¢ Ving ft ( na ect Oppo te e ch 1 1 a ce by suspend tring ooped el ( Irom a wooden { | ete he cy ~ a ull ent clea ¢ ) eC al l tie Ni ¢ re in t ire n. thicl \ ' +1 ] ] 1 and lept t ] ote 1 1 oO d ie lve elt ] MECHANICS A Rocking Duck Is Readily Be a Made by olued ] fSiued to the sh t must be in l Ust ve 1n ne and ru lor belts IR . ' 17 AoC lg tOvs \ | . o1 tr} , ] th small children. ] finds it ha té unaided. The rocki Of the illustration di iwback It con duck-head handle yprace Al] I ¢ Die OSs brace Y) 1 ry IVWOoOOoO I he ! ind thie corne ' , t ) TOCKEeT are 18 mum idth of 5 jn ! n. radius he se | ICKeETS b Nn ng race ot the e etween the ckers Wooden Tx Mount eT Dane ilways be 1 ut the troy } 1 ( t t et nor out duck he not wbo1e.¢ 5 ¢ a eat ] na the I P cent ti ft {i T + tts ‘ ' 1 e Ong | e | re cut ; + hdistene d luineg wn, ré Vv w} and Is Convenie

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POPULAR MECHANICS A %-in. round forms an additional brace bottom, as indicated. The duck’s is cut according to the -pattern, square being 3 in. in size. A han- provided on the head as shown. consists of a 634-in. length of %4- od driven through a hole in the The latter is securely fastened e seat with three wood screws, and races are used to support it, one on side of the head. The head may be ed white or yellow, the bill yellow the features outlined in black. All the heads in the body are sunk below urface, and the holes filled with putty. surface of the wood is sanded and a coat of flat white paint. After this lried thoroughly, a coat of enamel be applied, if desired ed together securely. 1are rod Winter Feeder for Birds hen the ground is covered with snow, find it difficult to get food to sustain life. They eat suet and and the feeder shown e drawing is designed to hold this kind «1 so that the birds can get at it at any It consists of a wide board nailed post in the vicinity where the birds regate. A shelf should be built be- upon which the birds can sit and he chips of fat, while other birds may orten of fat meat, to the poultry wire, which is nailed suet on the vertical board. se large- mesh wire and fasten it by means of flat- head nails, around which are wound all the loose ends the fat or of the wire, to prevent from these injuring the birds while perched onthe feeder. The poultry wire holds the suet in place and protects it Raise the feeder m stray cats and dogs. high as possible from the ground. 1035 Plug and Jack fer Auto Trouble Lamp A plug and jack, such as used in radio sets for phones and loud speakers, can be installed in the car for use with a trouble GROUNDED THROUGH FRAME OF CAR Radio-Plug and Jack Installation on Auto Makes Handy Trouble-Lamp Arrangement lamp. A jack of the single-circuit type is is installed on the dash board, or any other handy place on the obtained and car. Two or three jacks can be mounted at other points. A and the jack is fastened with the large nut small hole 1s drilled This nut serves as one connection to the through the metal parts of the The other connection is made with vire to the battery. A phone plug is connected to the trouble lamp with an extension cord. battery car. a single Pushing the plug into the jack immediately lights up the lamp When finished using it, pull out the plug —Herman R. Wallin, Brooklyn, N. Y. Steel Wool as Furnace Repair It sometimes happens that a poker oT shovel is pushed through the lower cast ing around the ash pit in a hot-air furnace, making a hole that causes excessive draft. \ satisfactory repair may be made by pushing some steel wool, soaked with iron cement, firmly into the hole, and smooth with the lining may also be used, but it is n permanent.—R. C. Tarr, ing over same cement Stove Gloucester, Mass

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1036 POPUL AR TWISTED-WIRE | HANDLE wt BRICK SATURATED, q WITH KEROSENE 4 it . 1 aws O Water Pipe 4 Brick Torch Thaws Out Water Pipes | e ¢ no ont 7 ey te pipes 1 » | + 1 + . er! tanks and O er places where an } . - 1 ; pet lame \ ao no ¢ ive, a ori j 1 I Vi e tor Wil be useliu \ Vv brict , ’ 1 T ed \ I severa st inds of heav\ 7 1 wire e strands being drawn together at ne cle nad t sted to 1 1a conve ent ndle, as shown in the drawing. The 1 1) ( . mime eC” 1 ( n of K € Ose , 1 I S ( ¢ to re n there unt thor 1 1 oug turates After that it mav be ‘ 1 , 1 Ly ef nad wsed as a ri 1m te li os It ck ai! het Pp ced | T ry 1 1 7 1 n111 ' 1 we hy x ¢ sene t WV ( 1S€ 1mero i uD € » rise to thie urtace and yhen these disc mntinue 1¢ 7 hye , me ] that t hie | is satu ¢ l’ ! uurn lol O r ( h tot i out r ) i Uses for Alum 1 Alum is used rather widely in the for f } t r ton ¢ } , f ] f+ ‘ ( . s oO stop ¢ ow ot bdiloor ( 1 cut rer s LV1l on i oun a) | | t st ngent opertie which sO 1 ne . ; t usetu n torn | 1 solution as a non-perspt ind deodorant \ weal MEC HANICS lution of alum makes an excellent 1 iI for plants, as it kills aphids, plant sites, and insects, but is harmless most ‘r plants tence | C will keep them away 1 ' fleas. A solution of alum will ble handles, but do not use it for ce as it yellows that material. Man particulat ly vellows, are brightened ipplicati on of a solution of alu this re ison carpets r improve pe ince when brushed th it B browns, ef: , reds, pinks, gree blues are set by alun [f brushe | celling i soiution of alu ( . ‘ move uperfluou f 1 them \] m1 #418 i oO u ed as | te is] il | ( ( Tié \ plaster of paris and m make ceiient cement It u ed n qu ! xed w iter P, de ed ligt in an old spoon and applied to the snes of broken 2 gras : old the ~ Bi et] e eT it tisO dade to giues ind pape pastes to! ve them. Dresse cu etc can e fireproofed soal na solution consisting of a table Ot alum to each quart « te! ry ibilit of rubbe can be increased ing 1t in a solution of um occa Turnbuckle on Ford Fender Brace Many Fords are fitted with a brace ning across the nt 1e1 ¢ to ) nh place ind prevent , ; ‘ . . hem trom loosening. a ta ition ot } turn - yuck the brace can © he made ic justable ihe tS ~ a rod is prey rec = A) ) % yy ¢ rh, \ ‘ ' } ’ ] f ) yy ie n the twsu Wii * leg 4] + Sa +“ ivV,tla ening Aon J Ss the en und Vi 4 ‘ 1 \ bending them er to contorm to the top of the enaders na then 1 , 1 , ’ the rod 11 \bout 1 in rod 1s er tf hot enothc nd ends are threaded fo turnbuckle 1 1 hich the brace can be t rened

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(" \CKED or sagging ceilings are not incommon experiences to the average eholder. As the method pair—battering off the broken plaster patching dust penetrate everywhere, as well as a customary involves clouds of erable bill for labor, the following e, quick and effective substitute will

Vz ; r E NEW CLINCH—==— ed eb ei eb eo eon de che oe ee ee a =a, = LATTICE -—+4F {fA wt

|) HOLES ing

i i, SPRAY, ~~ _ ATOMIZER td

hing and Re-Anchoring of a acked and Sagging Ceiling May y Be Done by This Simple Method without Dirt or Fuss to him. It not an untried of interest heme,” but has been | by the writer with satisfactory ] - | Lelings crack results. and sag “clinches.” med by forcing the , <— it plaster through the < ts ices between the laths J \ ve broken and no 7 nger support the tions below. The trou- por-

All Shop Notes published in 1926, in book form—Fifty Cents—from our Book Department Repairing Cracked Ceilings By R. L. WALES

ble suggests the clinches. The illustrated in the accompanying drawings. If portions of the plaster have begun to settle, it is back support remedy; replace the manner of doing this is necessar\ first to force them into their normal positions and to them there. For this purpose, a thin boards, like a section of a lattice ol

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POPULAR MECHANICS be placed against the pli ith which it comes in cont being forced upward make a good bond with it. Char ibout one cupful each have been u on by pieces of studding supports the success. Of course, the plas preventing mixed in sn same time vious to its t h difficulty ha ie plaster runn ceiling for work. a short time <§ is forced back, perienced in. apart, is made’ through +1 ; witn I the holes on the remoy illa ong the en- takes l spots Some round trips ot ! Calitornia va ‘ sili ala Heavy Canvas Apron | Laced to Mud Pan Prevents Overheating Caused by Tail Wind

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POPULAR MECHANICS 1039 Re aoving Insulation BOXES IN M t Wi In Stores and Small CARRY t ne ire a POSITION - ag Shops This Double- f 7 ‘Ge Box Carrier with Piv- i od method of re- oted Handle Will Be i enamel or other Found Very Useful A ld i! ‘ on from magnet ieasieas eeeeiceinanantieti ~T especially when a ends have to be for soldering, is a fine-tooth hack- ide, hold the blade - hand and draw the ver the teeth, hold- between the thumb saw teeth. This is very rapid. ne teeth will re- both cotton and insulation in one on, leaving the ight for soldering. Heating Linoleum Facilitates TRON Laying ; a HANDLE Illinois merchant, ikes a specialty of linoleum, contracting to cut and Double-Box Carrier » the floors, claims that success in it depends partly on its pliability, When boxes filled with refore he makes a practice of heat have » carried around the betore attempting to lay it in place possible to double the number ill oil stove is fitted with a large moved by One perso ice-pipe elbow. While the room is handle for two | made ready to receive the linoleum itter is loosely rolled and supported ucks, and the lighted stove is placed at one end, with way. the elbow di two boxes ;: rected to _ thetop of one. throw the heat other when the handle into the roll tical position The As soon as_ strap iron and is the heat from with two screws, ’ the lighted pivots With these handles one stove has pen can easily carry four boxes etrated the egg’ cee Effective White-Paint Cleaner ciently pliable lace three small OIL STOVE the work of water and boil them cutting and hev are soft. Strain is begun. With this method much it as a cleaner for white usual guesswork is eliminated, and powder nor soap is required loor covering is free from cracks. plication does not nee i

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POPULAR MECHANICS Holder Makes Gauge of Scales metal pot and apply some of it, wl on the screw about half of its lene iddition to a tool kit 1 Ider before driving the ‘rew indy < | cw home he one shown in the drawing. method is better than the use of , ‘ 1 on 1 7 ° +7 together “oate il, driven in cold Mirror Useful When Working be! FIRST SCALE Instrument Board. SECOND — SCALE shoulders When a fuse the lathe, it is disconnected much easiet1 velops bel measure in auto, it e reach the p on the back ] with 1 | ] In the hand or will be reflected proper limen- parts wi then

1 | | work can Robbins, Harwich e seen Air Space around Foundation Has Advantages Provision foundation has seve yoints of eo STUCCO warmth sured learance slot frost will rough for a ce a knurled ring Assemble the part ; rough the ring and the distance AT

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POPULAR MECHANICS

_ L Dumping Incline for the Small Contractor Is ? nsiderable Time and Excavations and Saves C in a scraper, and by meat cable, running on he loader, is dra Homemade Loader Saves Time for Contractor -oss-braced incline itself is ma One contractor, who had a number isements to excavate, decided to buil own dirt loader and save The soil is first fros with 2 by 4-in. joists \s soon as one excava time | loosened up ha plow. This is then ‘ - 4 eTsS are QUuICKI\ as ioved to the next scooped oo] on, South Bet Attachment Guides Cutting Knife or so o make it easier to slice long straight ths ot leather, rubber or similar a guide for mp cnife will be 1 useful. The shown in the ma

117 ing does awa\ L AND RIVETS the need fora | SHEET- iightedge, which < ; METAL a difficult thing » hold while run ne ng the knite

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Mirror at Gateway Permits Truck Drivers to See Pass- ing Autos and Avoid Accidents Mirror Prevents Auto Accidents at Gateway In the construction of a large office building in Denver, Colo., it was neces- sary to make a gateway in the high board fence surrounding the building site, to allow the passage of the material trucks. \s the fence took up a large portion of the ilready narrow street, the trucks, emerg- ng frequently into the stream of trafhe were a source of considerable danger to passing cars. The danger was eliminated by placing a large mirror on a post at the right side of the gateway, which enabled he truck drivers to see ipproaching cars before driving outside—Jos. C. Coyle, Improving the Drawing Board When large drawings or maps are to be made, the draftsman often has trouble an orawing trom the drawing ->. BOARD creasing at the edge wy of the drawing » board \ simple remedy shown in : ; semicircular strip of Tha | wood such as a broomstick planed dow n, is screwed to } ; the front end of the board This rounded edge allows the drawing paper or map to hang over it without creasing. POPULAR MECHANICS Paint does little good to prevent Effective Method for Preventing Wood Rot in Posts rot in posts, which are placed sufficie: deep to be rigid. A method has been covered, which is highly effective, practically covers the end of the post stone. Mix in an iron pot oil. After these ingredients one part of sulphuric acid. 50 rosin, 40 parts chalk and 4 parts li: part have thoroughly mixed, add first one part cuy oxide and then, very carefully and slo Stir this ur it is well mixed. Apply the warn ture to the post ends with a brush. coating dries very hard, and treated will not be affected by wood Another advantage is that the work ca: done more quickly than in other way L. H. Georger, Buffalo, N. Y. Handy and Economical] Oilcan Spout post The writer has never encountered oilean of a practical size for which having a spout opening oil on a stone exactly right, that is, drop by drop. The openings are ilways a little too large When the light oil used for such a stone is warm, it gushes from the can, no matter hov careful one may be. The trouble can readily be remedied in tl | i e to the her ‘A ( lip the small three-pronged from the end of an ol ind force it snug | oilcan spout. There is V ovel these little pieces which 1 tire-valve the end of a small hole just allows ould lowing w retaine oil to flow in drops as you want it to is very quickly taken off if wanted for oils of diffe rent purpose. This method saves Frank stone is never flooded ley, Jr., Missouri Valley, lowa. the can nature o1l W and Bent

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POPULAR MECHANICS Fluids for Drilling Glass veral fluids are used for drilling or fil- iss, of which vaseline oil and a solu- xf camphor mixed in spirits of tur- ine are the most common. A French tist recommends a solution of 30 er. mphor and 35 fl. live oil in 7 fl. oz. of benzine. This oz. of sweet-almond ure will not deteriorate, renders filing | drilling easy, and can be removed from vlass by simply dipping the latter into ine. The vaseline oil is more or less ectionable because it leaves the glass sy, and the solution of camphor in ts of turpentine is unpleasant to use use of the disagreeable smell. Whitewash Makes Breeding Places for Chicken Mites ordinary mixture to disinfect the interior of hen an of white- is used sultry house, it usually leaves minute blisters. Millions of mites may es or and multiply in these blisters, safe m subsequent sprayings of insecticide yvercome this, mix about 2 per cent or [st clue with the a binder, will dry 7 > ] ~ scales or blisters. whitewash. and a thick smooth with- Improving Corn-Crib Sill Construction he sill construction of a slatted type rib shown in the drawing will to its ie low- board is a wide ne, and is nailed at a slant so it it extends er the box sill. his prevents iter from dri ng on the Be 1 as the he sill really de- termines that ofa ib, safeguarding igainst rotting highly desir- ble. The con- also nplifies the ls Louis t1 uction studdings and Schneider, Clinton, Mo. joining of Ji \\ 2 paw — Nig Ny » alt F . wer. yea rr 5 ys tipo Roller Made from Old Oil Drum Filled with Water Efficient Lawn Homemade Water-Ballast Lawn Roller through to the strij ] ends,

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Rubber-Tired Wheelbarrow \ motorcycle wheel on a wheelbarrow makes it easy-running and noiseless. When

Pneumatic Motorcycle Wheel Attached to Wheelbarrow POPULAR

MECHANICS in a vertical position.

Such

installat are inexpensive and can be used on gation, drainage, canals; on small swamps, quickly by rubbing off the can be purchased at it softens this, or power, creeks lakes and reservoirs. ointment cloth and brushing witha stiff brush. B any When it comes in contact with type met forms which is easily brushed off, taking the d or navig or rivers, Oo!

Cleaning Casting Dies on Linotype When the casting dies on a linotype come clogged, they can be cleaned coating them with blue o ment, letting them stand for a while, t t 1 with a cl ointment is a compound of mercury drug sti an amalgar with it. Operators of li ‘pe machi: Provides Comfort for Worker ith be peratot o1 linotype naaeads will find that this method saves a lot a bump is hit, it does not jar the user like time and hard work. the ordinary iron wheels. Such a wheel s easy to attach—Carlton Groat, The , . ; = 7 Plow Pins for Cultivators Dalles, Oreg. Most cultivators have wooden pins : ; hold the plows. This is to protect t Old Culvert Pipe Makes Inexpensive sad. < Apelinade capris? plows in case they hit a rock, in whi Gauge Chamber j Tan? tag case the pins break. The pins are usua The accompanying photo shows how — cut or split from a hardwood block. A old culvert pipe can be used to advantage they are then square they must be ma in the installation ot a water-stage re corder. The ga in the upper e from the weath roof, riveted o1 easily reached cut in the side. Che float moves up and down in the lower portion of the pipe as the water rises and falls, the bot- tom being left open to admit water from the stream. Circu- lar iron straps, bolted to the timber heading dam, or bridge pier, as the case may hold the pipe rigidly be,

round to fit the plow. uge mechanism is mounted used a knife for this nd, where it is protected hard job and takes time. er by a conical sheet-iron bolted to the pipe, and that there were several through a swinging door tivator frame. By driving the square pit

Water-Stage Recorder Mounted in a Section of Old Culvert Pipe Heretofore I ha purpose, but it is One day, whe out in the field without anv knife, I fou holes in the cu t through one these, a neat round pin coul O hol ] be made. course, a the rig must of size In case there is not such found. a hole, a piece of flat iron with the right-size hole drilled it, should bolted at some place on the frame.—Wil fred Sorensen, Humboldt, Ia. in be

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New Uses for Old Junk ‘Sea Hi - ; Right, Effective carecrow Made from Dress- iaker s’ For m ;| Ab ve, Old Fishing ) M akes a Good 2 olds, M: ake Left a High Hc »rsest Village = a cks tk Makes E B imper

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1046 POPULAR Baggage Truck Equipped with Dis- carded Auto Tires Rubber-Tired Baggage Truck o prevent jarring of baggage, one bag agent discarded uses auto tires on wheels of the trucks Equipped in way, the trucks can handle greatet loads with less danger f the baggage fa ing off 1 A test was made ona load of milk and not a dro | milk was spilled rubber-tired trucks are also. silent and can be drawn past a with out disturbing the occupants —W. N. Me ; Little Rock Ark. sleeping car is COv, Effective Wagon Brake } general ou mple but effec ron brake in the illustra [ts construction is such that a slight on the lever causes the brake block to press tightly against the w The lever is quite short, agon tires occupying only a little space, and the whole fixture requires than the No pole projects upward above ess room brake the level of the average homemade bolsters or above the wagon box, to be tn one’s Way while load ing the wagon \ end of the tied to the rear extends to the front end rope, leve of the wagon, here it is accessible to the ‘+r, who can operate the brake equally well for either running gear or wagon-box hauling The tied to rope is the right MECHANICS hand standard, to keep it at a point the driver can readily reach it. None of the materials required fo: construction of this brake are hard to tain. The hardwood as and 3 in. used is 2 in. wide. Four iron bars, 3% b in., are required, two of them being on top and two beneath, to keep the br ylock holders in the desired position, thin iron bars, bent to the shape sl! in the illustration, are used as a sup] ior the brake lever, and also to con: the brake-block and they vide a for the lever whe holders, sort of rack is idle. These pieces are attached t hort block holder by means of a U bolt, and to the longer witl The driven is one which the banded at the end splitting. The b connected by screw timber into screw 158 from holders are further of two bolts and short point near the center of the was Pieces of an old casing should be nai to the brake the wood prevent it two straps blocks, to prevent weal The illustration does not the detailed construction of the and few of the dimensions are given ~~. ‘ ~~) ' ‘ S| ' ' 3 X15 BAR IRON 7 Homemade Brake for Heavy Wagons Which Has Bee Found Very Effective one should be governed by the kind of S1Ze al wagon, when determining the sizes of the parts to be used. The brake can be made adjustable by drilling more than one hole near the end of the quarter front lever, where it is given a twist

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POPULAR MECHANICS ng the lever forward causes the -e-block holders to come _ close to simple Method of er at the lever end of the brake, and = prey iP hav one e blocks bear against the the Aid of a Block e sure that the brake blocks ose enough to the wagon tires before makes ‘t h B yn tires. ling the location of any holes, as these influence the size of the openings be- en the blocks and tires —Bunyan Ken v, MeCool, Miss. Curing a Waterlogged Hydraulic Ram iny farmers have difficulties with hy- lic rams after a short period of oper n Che ram seems to lose its efficiency finally the flow of water stops almost rely. This, in many cases, is due to topping of the snifting valve—a plug lly found screwed into the base of verv small hole drill admits air to the at each stroke and, the ram will not oy ssible that the waste ter from the ram, running past the plug 1 cover the hole, and this would have ime effect as plugging the hole with use. Keep it clear, and you will find the ram will work satistactorily.—L Robbins, Harwich, Mass. Handy Pipe Rack ad } waidil ’ld lengths of usable pipe and stock \ simple | often lie around in the small shop rods into the ground here they may roll over the floor and ‘onsists it ing a bl in the way. I took a number of dis- rded old cde ¢ old- le brake- ind wanted without ma erial Was also ent'r Frank W. Bentley, Mi

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POPULAR MECHANICS diator. One motorist was not only st many miles from home, but had t place an expensive aluminum cy] head because the solution had so cor the metal during a few hours’ stan that it broke down as soon as the car run, and flooded the evlinders with Both liquids were safe in themselves combined chemically to the detriment the aluminum.—Harold E. Benson, D: ver, Colo. Special Wax for Filling Pits in Varnis on Pianos If the varnish on a piano has pitted the pits with a wax made as follows oz. of carnauba wax, 2 oz. japan or white beeswax, and 2 oz. of cere wax in a suitable vessel. A good met! is to place one vessel inside of anot! ‘tt water in the outside one in the other, then set them a stove. When melted, add enou 1 3 kerosene to form a mass like petrolet Folding Sawhorse Is Handy to Work On and Easy relly when cool. Thi may be t to Carry Around . placing some oft Folding Sawhorse for Small Repair Work 4 letting it cool ker t . 1 ' with aw I nad jobs away frot he shop, a Wisconsin piano with a wool pa hinge a ications unt For general repait ork, especially o1 carpenter employs construction, so that it se — TI} ] e . @ ] } ‘ , =.) ° ° of two. the | lown Windshield for Handcar the accom! llustra ) ind 1 . P : > , ‘ Me mies windshield for a hande: eb of vw men working in cilitate mx mfort during the cold wi . L ad is simple and inexpensive ti , ; should be of interest t ection Cautions in Use of Anti-Freeze Solutions Windshield for Ha car Gives Protect th some against Biting Wir during Winter Cold ve; = = ‘ar owner replacing > «OW “4g in l Cat Wil ! form of anti-freeze solution. While alco- hol was once the matt stand by, every winter sees a number of new preparations placed on the market as substitutes, claim- ing various advantages. One thing that seems to be common to the majority of them is that they will leak out of a radiator that is water-tight, and to prevent this, some torm ot radiator liqu dis otten used to seal the leaks if they cannot be stopped _ railroads working in the open. in any other way In such a case, how- of either canvas or light wood, ever, much trouble can be prevented if celluloid or glass panes to permit the two liquids are sted chemically view of the track ahe: W. H. Soames before the mixture i in the ra- Minneapolis, Minn.

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ipeless Furnace Made from Old Heater By L. B. ROBBINS NABLE to heat his house properly | vith an old-type of hot-air furnace, vriter, with little work, changed it into eless furnace, which has given entire faction. The same firepot and stove ngs were used, but the casing was ed in order to eliminate the individual to the different The con- furnace has heated the house to a al 70 rooms. and higher, even during ex- ely cold weather. is not necessary to tear out the old ter entirely. If the firepot is large ugh, you should have no difficulty in ting your home either to normal tem- iture on coal or higher on the e amount. The advantage of the new tallation is that all the heat is dis- rged into the house through one reg- and that the return pipes conduct air back to the furnace for reheating, blishing continuous circulation. less

ARRANGE MENT, AND Old-Style Hot-Air Fur- ace Converted into an Efficient Pipeless Furnace, Which Heats the Entire House; the Cost of the Furnace Amounts to Only Fifty Dollars The pipes to the irious rooms were removed from their and the collars on the registers Cas- ng dome. The reg- isters were taken out boarded up to and the holes match the floors. The casing around the firepot and the radiator casting was disengaged by removing the bolts which held it in place. As each piece was taken off, it chalked with an identifying mark to avoid mistakes when reassembling. Next, the sections of the stove were taken down and the joints thoroughly cleaned of old cement and soot The proper location for the heater must then be determined. Was In my case, the reg ister was put on the west side of the house midway between the north and south end because the prevailing winds are from the west and thus strike the warmest side of the house and spread the heat evenly through the entire building. Always a spot should be chosen that will promote even radiation and heat to the second floor. ready ascent of the My old furnace had an 18-in. firepot, and I found that ad a 7-18" HOLE <—/ AIR BOX 12 COLLAR | UNDER REGISTER COVER FOR HOLES SHOWING RETAINING TABS with central grating, the correct use. A 30-in. square hole was, therefore cut in the rectly over the new location for the fur | nace and the regis ter was set in posi 104

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POPULAR MECHANICS Dome Are Closed by Pieces of Sheet Iron; Rig! Left the Pipes Th Return the Air for Reheating done. new bolts, and the Short pieces the bolts at was wrapped ab u 1e short ‘omp sheet-iron 30 in. square and 18 illustrates the

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POPULAR MECHANICS round hole was cut and fitted with ar. The box was slipped down into egister hole and the top edges of the vere nailed to the inside edges of the about in. below the floor level. heater was then inserted igh the in the bottom the ind fitted over the 18-in. collar on the if the furnace dome. A length of 12- pe and the necessary ed the 12-in. on box to corresponding Ing, stack hole Ol elbows the 12-in the furnace. con- of collars The fin- shown by the The entire furnace bottom of the including the 12-in. pipes, collars sides e bottom Ot assembly is clearly and drawings. [ up far the not ng, as but covered with a 1 a> -in. layer of asbestos form in water When it dried, coat white cold-water The smoke pipe was fitted with a k damper that could be operated by a ter, mixed to a paste ipplied with a trowel. is given a ot n from above for regulating the draft ut going down into the basement. he drawing shows ir, which c the al pipeless furnace. into the the circulation of ompares very favorably double-casing system of the The rooms heated air directly } 1IOWS al and, when ong the floors. down the e register into the box 12-in. pipes, to the bot heated the casing where it is rehe This ac there is fire in through the oT igain rises into the house. continues as long as 1 furnace. Che 1051 Piano Stool Handy as Tool Holder By utilizing a piano stool for a tool holder, as shown in the drawing, a man found that tools with less risk losing The fitted rim separated from the top by a l-in. space. This done four blocks garage can be kept handy of them. stool is witha was by nailing l-in. equidistantly about the edge of the seat and nailing a barrel hoop to the blocks. The tools were hung in this slot, and the seat could be turned to bring any one of them The be used by the repair man as a seat, 1 within easy reach stool could alss desired, by pushing some of the tools gether on one side. Clamp Holds Auto Hood When most working garagemen , ; hood entirely to eli raising ant V Oo occasion demands improvised a simp! of making this — 4 STEEL ROD is less has = t ) the trou tallation wa ] in $50 and repaid Practically all heat generated the firepot is util and the fuel t is reduced con- erably. @ All metal patterns hould be thor- ughly cleaned with tiff brush having plenty of on it and dipped in beeswax SO powdered Oo, to plumba- Simple Device Holds draw easily. Both Sides of Auto Securely without Marring Finish RUBBER -TUBE COVERING on bent shown and lengths of tubing slipped the “legs,” BeETatec hood. Hood Up

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POPULAR MECHANICS t “ lepends, { imeter of he di material] it in general, millir Imost at making sed on “1 Most Economical Shape of Canal cutters 1 Found by Experiment to ¢ will be found outside diameter. Over and ly liameter, the angle may decrea 1 j 1 diameter, until 1age-Canal Bank from 6 Se each Serviceable Spring Bumper \n efficient and sturdy made fill ill be "asIng 7 ] I usua both 7 1) equ l encour ours 12” LENGTH ' OF CASING \ “ROLL OF INNER TUBE? gz and Inner Tube Make Effective per on Auto Spring met

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A Substantial “Built-In” Chute for Barrels and Boxes By ROY M. SINGER HUTE that will handle both barrels nd boxes with ease is exceptionally All the necessary details for build- uch a combination chute are shown llustrations accompanying this arti- nabling anyone to build it without e The particular feature of ad- ge of this tvpe of chute is that the ; can be controlled so that they will ide off the chute on the way down. lides are made of angle iron such as e obtained at almost any place where tural iron is available. It is quite so that a barrel will slide easily between them, and the third is placed so that the chute will have sufficient width of bearing for the largest box it is expected to handle. The method of anchoring the slides at the top and bottom is important, for upon this [ installation. depends the entire Che leg at the top should be flush with the surface of the concrete, and stability of the the bottom leg should be imbedded in the concrete floor At the top. bolts as indicated in the details the slides are held with anchor fixed in the concrete, the heads of ble that seeondhand pieces of suit ize can be picked up The proper size of angle iron to + by 4 by % in., the length of the of course, depending on the par- installation. the bolts being set in hole countersunk in a junk in the slides, so that these heads will not interfere wit barrels washer Ss, 4 , the bolts in th over the surtace are used to set concrete At the by % in If extremely bottom, the slides are heavy held in the concrete noor by Strong Chute of Angle Iron for Advantageous Han- : dling of Both Barrels and Boxes inchors. S h Oo One made and barrels handled, advisable to 4 by 4 - angle iron, placed that the 6-in. side vertical. The first be to be 6 by des must to the proper length nt to the desired curve. and are then Three of them re required, as shown in the photo. Two { the angles are placed far enough apart

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POPULAR _»— 4X4 ANGLE —s

MECHANICS

, —— 2 BOLTS WITH WASHERS a ; a = = 5 A, Ss \ UPSET SPACER - "_ eee | es ‘ > | ae Veen maa v4 SEPARAT Sti ANCHOR BOLTS ---//»!- Sf /\\ ¢ ARATORS Math Ni 4K.) Y / I ) ‘ he J Ses y, L a roy on 2 EE \ We? } J tobe , f THRESHOLD One: Wy s kk rc cal ~ BASEMENT FLOOR - 8 | EY MOLLOWED OUT 1 = eh — _ HUES ANGLE IRON | eee . =e > i CONNECTION Bag laced at intervals of INBASEMENT | tt ——____ “P P . SCE Vals OF aupge’ : ‘ FLOOR | A é t 1 ] t ‘ { ] ti y ¢€ er yrrectly there pe i ] ) t loud! nut to é crewe yn each i € les

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ivs either resting on the bottom, as in the drawing, or carried by the e. The twisted cord tends to un- tself, and as soon as the can is set the handle snaps back out of the When the contents of the can have used up enough to decrease its t, the handle is unwound a turn or make the can hang straight. Bleaching Linseed Oil t is desired to bleach linseed oil for special purpose, mix it with some per cent of peroxide of hydrogen in a glass vessel and shake it from time me. It will require only a few days leach the oil, which then may be red off, the peroxide having been re- ed to oxide of hydrogen—water. There ther ways of bleaching linseed oil but require about a month in making the nge, and this is the simplest and quick- ethod.—A. A. Kelly, Frazer, Pa. Armature Winders’ Hammer and other mechanics vork on electrical machinery, often to force wires into their slots by tap- rmature winders, ping them = down with a hammer. To do this with- out damaging the insulation requires con- siderable skill, unless a ham- mer having a resilient face is used. An ordinary me- chanics’ ham- mer can be provided with resilient face by wrapping friction tape er it, as shown in the illustration. The ipe is coiled into a tight roll equal to the imeter of the hammer head. It is then iced against the face and bound to it by dozen layers tightly drawn over both the immer head and the extending roll. This ill provide effective cushioning for the blow and protect the insulation from dam- ce.—Eugene Emerson, Brooklyn, N. Y. POPULAR MECHANICS 1055 Locking the Steering Wheels on Trucks Used in Factory It is often necessary to back a factory truck a considerable distance down an Locks the Sheet-Metal Device on Factory Truck Steering Wheels alley having very little clearance, and } is an awkward task, as it is difficult to bacl it up in a straight line. By fixing a simple lock on the truck, we overcame this dit ficulty. The lock consist Ol a piece ) strap iron, bent double and fixed to the top and bottom of the truck floor in the center. It is slotted t receive the t When the truck has to be backe any distance, we first set the rear \ ee] handle straight, then push the handle back into the slot to lock Moore, Montreal, Can Floor Heater for a Small Shop The brick floor in my shop is very cold in winter, and to make it more comfort able, I removed the brick and dug a hol 36 in. long, 18 in. wide and 18 in. deep front of the lathe where I stood most o1 the time. An old two-burner oil stove was procured and set in the hole. I the covered the hole with a board, made to fit tightly, and bored a number of ™%-in holes near the center. \ large hole wa also cut at each side for draft | surprised at the results of this little heater J. H. Priestly, La Mass. wrence,

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Is This Your Home?

building addressed to this magazine will be answered by The Archit Small House Service Bureau of the United States, Inc., controlled by the American Institute of Ar he United States Department of Commerce. Please inclose 10c in stamps or coin. the house shown here may be obtained from The Arct fee If further information is desired, literature describir service at put Small House Service Bureau will be sent you upor A booklet entitled “50 Ways to Lower Home Building Costs,”’ illustrated by ten Bureau h ved in and showing how as much as $1,000 can be saved on a home, may be obtained for 20« STIONS regarding home s and endorsed by t pecification forms, and material lists for House Service Bureau for a small mall r blications of The Architects’

cement is teature, | indard equipment somewhat more great are not <¢ to the plan aps home builder inclined to gi exterior most of attention There is a cont which lend Vivacity as well roo, brick insets bound door. the chimney whic hol] bou ided whic \ nda l Construction: Hollow position terior finish stucco bedroom frames mav be « lining roo forty-five feet

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POPULAR MECHANICS ADVERTISING SECTION 1 AREER <ALL I IIRL LE SES: STEEN Ni A TL A SEN = mE nN RR

LEAVE IT TO THE YOUNGER CROWD TO KNOW THE BEST! A ‘_ Ww \* ec | wees T is characteristic of this younger set to settle the cigarette question exactly as they settle their hard-fought games—on the sporting principle of “may the best win!” FATIMA ge x A few cents more—for the best that money can buy!

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POPULAR MECHANICS ADVERTISING SECTION RE you searching for a helpful, useful, prac- tical Christmas present—for son, or daugh- ter, for brother or sister, for wife or husband, for dearest friend? Here it is! The Remington Portable is a gift that always inspires gratitude, for it provides its owner with the modern, time-saving way to write. 4 Remember that the Remington Portable is the world’s smallest and lightest typewriter with standard keyboard—weighs only 814 pounds net and fits in a case only four inches high. But it is complete in every feature—strong and durable— simple and easy to operate—the recognized leader—in sales and popularity. Terms as low as $5 monthly. Sold by Reming- ton branches and dealers everywhere. Send for our booklet ‘For You—-For Everybody.”’ Ad- dress Dept. 12 Remington Typewriter Com- pany, Division of Remington Rand, 374 Broad- way, New York. Remington Po rta le OVER FOUR MILLION REMINGTON TYPEWRITERS BUILT AND SOLD

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Popular Mechanics Magazine 200 E. Ontario Street, Chicago, U.S. A. H. H. WINDSOR, Founder H. H. WINDSOR, Jr., Editor and Publisher London: Hachette & Cie., Paris: Hachette & Cie., lion & Gotch Melbourne: Gord, 6-17 King William Street, Charing Cross, W.C. 2 111 Rue Reaumur 509-513 Little Collins St.

—_—— ————

ISSUED 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 - - - - - “ae toe. - «+ 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. Entered as Second Class Matter at the Post Office Department, Canada. Published monthly by POPULAR MECHANICS CoO. Copyright, 1927, by Popular Mechanics Co, Copyright in Australia. Copyright in France

Vol. 48 Contents for December, 1927 No. 6 Advertising Fire Station—like residence beautifies city ; 910 big toothpaste tube gives bathers ride , 987 Fish—guarded from road oil by curtain on bridge 922 statue of cow advertises city creamery , 927 7 and Nutrition—how Uncle Sam’s food testers ons irplanes elp you midget high-speed, has 80 horsepower motor 1000 Foundry Ladle—sliding-grip, guards hands'from heat 998 seven passenger, supported by one man . 895 Furnace—gas, for home as many advantages 997 without wing struts may have greater speed . 984 Garage—Accessories ; Animals—in first balloon flight honored 897 merry-go-round wash rack quickly cleans autos 895 Archezology—ancient toy soldier found in burial mound 913 valve grinder that fits hand 923 Architecture Gardening—‘‘collars’”” speed plant growth 938 beauty of city increased by color of buildings 890 Gas Masks—tested to prevent accidents 890 Russians plan bomb and gas proof cities 92 Gauge—to place door hinges 982 Astronomer—Danish honored by marble monument 906 Gems—mysteries of, puzzle scholars 985 Astronomy Golf—ball branding stamp prevents loss 913 color photos of Mars result in new riddles 987 Gun—coast-defense, has range of 27 miles 912 the world’s largest eye 970 Handcuffs—like steel mittens prevent use of gun 976 where a pint weighs 25 tons ..... 962 Horse Racing—the horse or the jockey? 916 Automobiles Household Devices 990 speed of pocket-size car 18 miles an hour ... . 891 House Plan _ 1056 truck wheels of rubber reduce tire expense cose OO Ice Cream _ Automobiles—Accessories frozen with tablets 904 disappearing bed latest camping comfort - 968 | special scoop for cones _ ; oa heater eliminates back pressure 906 nsomnia—bed rocked to imitate train as cure 88 heater unit helps start car and saves gasoline 993 Life Geving wheels serves rural readers 895 self-dimming light penetrates fog 936 ; . 3 tin traffic officer in car helps prevent accidents . electric pump to restore blood circulation 992 utomobiles—Repairs _ throwing out life lines from airplanes 907 pedal depressor aids in brake adjustments Lightning—artificial, studied in laboratory 891 vertical lift elevator saves garage space Lock—door knob has cylinder for added protection 969 itomobiles—Tires—casing spreader helps prevent eae by amphibian tug ‘ Se ah demountable body for loadin : " air-mail letters identified with label tape here y 8 growth of air, sets aviation record a eile flights worth the price? slot machine that cancels letter eliminates stamps carrier holds eighty planes 989 “ete the robbers leliv i i ° ° ° 7 tr owe Se airplane with small parachute pe needle branding device identifies grade of meat Beset iad pu , 7 ~~ 946 steel gloves for packing-house butchers Bicyc o-filen a a sonal of NEE Meclgeray baad 982 Bioanentate-— Grecian monuments to American heroes a pe : , irages—weird phantoms of the air Birds—secret of flight sought by science . 929 Models—plane flies backward or poises in air Boats and Boating : < Motor Bus—tilted windshield eliminates reflection birds’ wings emulated in new sailing yachts 986 Motorcycle small boat run by windmill built to cross Atlantic. 999 contortions of passenger help win race speed boat of rubber won't get water-logged 1000 trailer cuts outing cost sowlders—artificial, protect river bed from erosion 928 twin sidecars carry two children Boxing—in barrels yeh Ricci Gigs 884 Motor Sled—run by cogwheel sridge, Japanese—shows progress 883 Moving Pictures illets—that leave track of fire aid target practice 998 cameramen ride on engine to film rail movie 3ump Meter—insures smoother roads . 961 hair tests with color chart to improve Lable—protecting shore ends of 957 show romance of industry -ards (Playing)—black-backed show fewer stains 890 traveling theaters for Italian towns -hair—locking joint increases life of 975 Music—scales measure power needed to play piano t ney—cleaner and draft combined 978 Oil—wells tamed by cement applied by novel process -ircus—It’s a simple life for children of the 948 Package Tier—portable, saves time and expense l ck—starts furnace ._ 947 Paints and Painting ‘s crete Form—wall tie for, saves work and cost 987 airline from paint sprayer supplies worker’s mask ime—finger hand sprayer for lacquering _. Criminals . 973 Paving—motor driven pounder lays blocks Electricity Physical Culture high-voltage tester guards against accidents 960 leg exerciser keeps runner in trim : splendor of oriental palace magnified by lights 969 mechanical wrestler develops arms and back ectric Wires—tester for, simplifies repairs 920 Plumb Line—self-chalking saves worker's time “ephant—stone, as billboard in China 960 Police -ngraving Block—of cellulose composition ; 976 “Iron Philip” helps train German e Fighting ; traffic, have heater and protecting shield auto changed into fire engine to help save forests. 956 traffic, use periscope to trap speeders extinguisher like pistol . . 969 Pontoon Bridge—profits from, reward builder [Continued on Page 4]

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[4] [Contents—Continued] Poultry—chicken farm on city roof Radio cabinet table built for less than five dollars tone filter made from Ford coil weakened by light shining on aerial Radio—Aerials cleaning insulators on apartment houses Radio—Applications . Scotland Yard enlists radio to help catch thieves street lamps in eastern city controlled by tanks equipped with direct British maneuvers Radio—Batteries handy tester new charger is dry trickle charger from full-current charger Radio—Broadcasting—time card Radio—Coils—small electrically driven winder Radio—Condensers—testing Radio—Installation—oscillator for testing and —, in Datio-Louk Speaker—built in globe form Radio—Receiver loop set built in for cabinet speaker shielded units feature new infradyne Radio—Tubes—booster works on B-battery Railroads air jack speeds transfer of car wheels engine location board aids efficiency fair of the iron horse celebrates 100 years of most difficult covers seventy miles rail-laying device operated by one man shields on open observation car testing giant of the rails over mountains Refrigeration—refrigerating unit operates on cook stove Rivet—cutter shield reduces labor and aids safety Roosevelt—house returns to the family Saws and Sawing—electric for butchers Service Station—like teapot Ships—building in backyard is profitable hobby Ships and Shipping electric beam penetrates fog to find ships floating service stations for liners just one more trip - modern Vikings prove Ericson’s feat possible Shoe Pad—air cushion, relieves foot ills Skyscraper—X-ray picture of shows structure Smokers’ Accessories—air and water pipe Snow—fighting on Pikes Peak simplified by tractors Spectacles—bow on top gives wearer clearer view Spiritualism—tricks of the ghost hunters Sports—putting zip and speed into winter String—seven mile ball of Structural Engineering—buildings tested in wind tunnel Sunburn—fancy, with stencils Swimming—dog-disguised swimmers add sport to race Taxidermy—paraffin bath for specimens Temperature fat men can stand more heat than thin regulated by automatic valve on radiator Traffic : light cells as policemen to regulate sign in silhouette is more easily read Singapore policemen carry signs on backs Transportation—from stagecoach to the latest plane rees change fruit of walnut, by grafting dwarf, a possible substitute for briar Typewriters—folding cover prolongs life of Vision—affected by overeating Warfare—cavalry horses to be dyed to combat air at- tacks Weed Cutter—for railroad right of way Whales—a fat cure from Wires—tested by apparatus which measures billionth of inch Woodpeckers—harm power lines’ poles Yosemite Falls—framed in high hotel window AMATEUR MECHANICS Alum—household uses for Automobiles grease cup helps prime vacuum tank how to prevent a frozen oil pump turnbuckle on Ford fender brace Automobiles—Accessories canopy for rumble seat plug and jack for trouble lamp windshield warmer 947 1001 1010 . 912 1013 1011 936 978 910 1013 1004 1011 1004 1011 1004 014 1014 1005 1012 1013 944 946 892 922 989 984 896 956 . 994 884 935 985 993 974 914 930 988 975 944 894 897 939 915 922 921 Automobiles—Driving anti-glare cap for motorists .... fence from old wheels guards ditch instructing beginners Automobiles—Equipment adds safety to coach Automobiles— Repairs oiling the springs repairing radiator leak Birds ornamental dovecote winter feeder for Curtains—weights to prevent whippin : Diamonds—bathing to check yellow tinge Door Lock—protected by receptacle plate Electric Toaster Stove—lid for Fireproofing—Christmas tree ornaments Fish and Fishing—kink for fishermen Furnace, Hot-Air—automatic valve for water pan Hangers—hat, for closet shelf Milk Pail—clean bottom for Motor—outboard, removes water from basement Mucilage—bottle corks that won't stick Screen Door—cork prevents hook marring Scrubber—electric floor Shelves—fitting to odd corners Ship Models—build the “Flying Cloud” Skating—flaming beacon for night Sled—single runner for narrow track Steel Wool—as furnace repair Toothpaste—cleaning out tubes Toys—two homemade, for Christmas Trees—protecting young fruit Violin—restoring tone quality of Water Pipes—thawed with brick torch 1030 103} 1020 Strap and Supplies—leather SHOP NOTES Automobiles—canvas apron prevents overheating Automobiles—Driving—cautions in use of anti-freeze solutions ! Automobiles—Equipment spring bumper Automobiles—Repairs—mirror behind instrument board Baggage Truck—rubber tired oxes—carrier for two Building Construction advantages of air space around foundation driving long rods into the ground homemade loader saves time for contractor Can Handle—detachable Casting Dies—cleaning on linotype Ceilings—repairing cracked Chute—substantial built-in, for barrels and boxes Corn Crib—improving construction of sill Cultivators—plow pins for Cutters—clearance of milling Drawing Board—improving Factory Trucks—locking wheels to back straight Furnace—pipeless; made from old heater Garage—Accessories—clamp to hold auto hood Glass—fiuids for drilling Guide—for cutting knife Hammer—for armature winders Handcar—windshield for Heater—for small shop floor Hydraulic Ram—curing a waterlogged 10 Irrigation Canal—most economical shape found by e» periment , Junk—new uses for old Lawn—homemade water-ballast roller Linoleum—heating, facilitates laying Linseed Oil—to bleach Magnet Wire—removing insulation from Oilcan—handy and economical spout Paints and Painting—effective white paint cleane: Piano Stool—used as tool holder Pipe—handy rack for Poultry—improved whitewash disinfectant Sawhorse—folding, for small repair work Screws—to make hold in soft wood Tack—radium-headed shows door Tools—holder makes gauge of scales Traffic—mirror prevents auto accidents at gateway Wagon—effective brake Water Gauge—old culvert pipe makes inexpensive Wax—for filling pits in varnish on piano Wheelbarrow—rubber tired Wood Rot—preventing in posts and Supplies—serviceable when working useful

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POPULAR MECHANICS ADVERTISING SECTION DRAKE'S wectancat BOOKS THEY WILL RAISE YOUR PAY— ORDER ON 5-DAY TRIAL “books listed below will perfect you in your chosen trade—pave the way to the big positions. Written on-technical language—easy to read and understand. Every book covers its subject completely. \n entire course of instruction condensed into one volume. Your choice sent postpaid—you efit 5 days— money refunded in full if not entirely satisfactory. Order direct from this page. ‘ AUTOMOBILE COURSE IN STARTING-LIGHTING| AND IGNITION | ROOF MANLY

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Automobile Books Carpentry Books Painting and Decorating Starting, Lighting and . “ Furniture, Furniture Finishing, Dec- by Manly 700 pp. $3.00 Cloth Binding oration and Patching $5.00 Automobile He mndbook $2.00 | Modern Carpentry, 2 vols . Ross Crane Book of Home F urnish ing and tor Car, Truck and Trac- The Steel Square, 2 vols . Decoration Cloth $3.00 Manly C loth $1.50 | Modern Estimator “f House Painting Methods with the , Care and Re- Timber Framing . Brush and Spray Gun, by Vander- y Mar Leatherette $2.00 | Builders’ Architectural Drawing walker Cloth $2.00 e Hi und book, by Manly $1.50 | Concretes 8 Interior Wall Decoration, by Van- Practical Bungalows derwalker Leatherette $4.00 =. Roof Framing, by Van Gaasbeek . The Mixing of Colors and Paints, by Vanderwalker Cloth . Studio Handbook—Letter and De- PRaCTiCAN | gets =. - sign : HEATING SYSTEMS a: TS atm A Show at Sho’ Cards Cloth ROUBLE JOBS | oo y % Sign Painting, by Atkinson. .Cloth / : ? Strong's Bookof Designs, Leatherette Modern Painters’ Cyclopedia .Cloth Automobile Painting -- Cloth §$ New Hardwood Finishing... .Cloth Wood Finishing, Plain and Deco- rative Cloth Owen's Paint Guide. ..Cloth ° . Steam sisi Swingle’s Handbook for Steam Engineers and Electricians Leatherette. $4.00 Examination Questions and An- swers for Marine and Stationary Engineers 2 Leatherette $2.00 . b Tal Steam Boilers leatherette $2.00 . — 7. Swingle’s Catechism of Steam, Gas Shop euniinn Books \ 78 r 2 and Electrical Engineering Heating Systems, Trouble Leatherette $1.50 nd Ventilation $4 ’ . ° | Workers’ Manual Drake’s Radio Cyclopedia Modern Languages lene We gs Cut- y Pro s en 0 hicago : — = < oth * By H. P. Manly French without a Teacher Cloth and Logarithmic Tables 870 Pages, 985 Illustrations, 1700 Subjects Spanish without a Teacher Cloth for Millwrights. Cloth arranged alphabetically. For Service and German without a Teacher Cloth e Shop Practice Cloth Repair Men, Dealers, Salesmen, Expert- Everyday French al Drawing and Machin menters and Designers Bound in Art Everyday Spanisi ! Cloth Buckram. Price $6.00 ORDER DIRECT FROM ‘THIS PAGE — —ON OUR MONEY-BACK PLAN a o—

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$ lis ted above are only a few of the many in our FREDERICK J. DRAKE ie which you will receive promptly after filling out 1008 Michi ng us the attached coupon. For quick action order this page—cross name of each book wanted and 111 Chicago, ° , GENTLEMEN =~ Pleas at wd gece ns, oe We prepay postage and send the trat “ } i} ated ci stalogue t - h ius ir money-back plan X s jome jechanical Book for I FREDERICK J. DRAKE & CO. t Publishers 7 gan Avenue fr me ts and descr stud) 1008 Michigan Ave. CHICAGO Drake Books Are For Sale at All Book Stores

To SS cae Mail Coupon For Free Catalogue Your Guide to Home Study

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POPULAR MECHANICS ADVERTISING SECTION Were You Borna Money- Maker?” Neither was I, but I have learned the secret of making money—and here it is— ought to be worth at least $5,000 a year to you, and I’m not goingto charge youa single penny— ‘When I was your age, I was always wondering why the boss never seemed to take much interest in me, Every six months or so I would hit him for a ‘raise’ — and oe in a great while I would get an extra $5 a week. But the big jobs—the jobs that paid real money—always went to someone else. ‘*Then something happened that set methinking— ‘*Bob Harris, who had started at the same time I did, was promoted to the very job I had picked for myself—salary $6,500. I knew Bob didn’t have any more natural ability than 1 had—yet the fact remained that he got the place. AndI had to admit he was better able to swing it! *‘Well, I took myself aside, and for the first time in my life I looked the situation squarely in the face. That night I clipped and mailed a LaSalle coupon, How He Landed the Big Job “And now came the big surprise—for me, at least. ‘‘T had always looked upon home-study business training as drudgery. Inside of three weeks, how- ever, | actually got to looking forward to those different lesson assignments. You see, instead of reading a lot of heavy, theoretical stuff, I took up case after case that represented ac/ual business problems. Iwas shown the principles that governed them; chen I worked them out for myse if. It fas- cinated me, because I couldactually see myself grow. “First thing I knew, I received my first real ‘raise’ —then a better job—and a better one yet **I told you I was going to let you in on a litile ecret. -Well—the secret is this: Always give a little more than you’re paid for. And—so that yon can be sure to give more, first get more lo givel [« going to let you in on a little secret, Tom. It Send for These Free Books—They Tell You How You want to make more money—as soon as pos the least lost effort. Then there’s one thing you should do immediate should send to LaSalle Extension University and a 3 how you can turn that secret into cash. During only six months’ time—as a direct result of that secret into practice—as many as 1,248 LaSalle reported definite salary-increases totalling $1,399,5 erage increase per man of 89 per cent. Find out how you cas duplicate or even exceed this record. To aid you in this purpose, LaSalle has prepared tv interesting and helpful books and will send them t out cost orobligation. Oneis a64-page book outlining t tunities in the business field that most appeals to y you exactly how you can turn them to your own ad The other has marked the turning point for thous entitled, “Ten Years’ Promotion in One. Face your problem—decide the field in which yor make a big success—then fillin, clip and mail the cou; —_——<— — — Find Yourself Thru LaSalle = = LaSalle Extension University The World's Largest Business Training Institution Dept. 1264-R Chicago ar I would welcome an outline of the L aSalle os plan, together with a copy of ““Ten Years’ Promotion in One,’’ all without obligation, OBusiness Management O Modern Salesmanship OHigher Accountancy OTraffic Management O Railway Station Management OLaw: Degree of LL.B. OCommercial Law OlIndustrial Management Efficiency (C0 Modern Business Corre- spondence and Practice OBanking and Finance OModern Foremanship OPersonnel Managemen OExpert Bookkeeping OBusiness English OCommercial Spanish DEffective Speaking Cic. P. A. Coaching OStenotypy Name Present Position Address

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POPULAR MECHANICS ADVERTISING SECTION LINENS TRADE GUIDE a ERNE EE ae Sen rE een AUDELS CARPENTERS AND BUILDERS GUIDES—4 VOLS. $6 Inside Information for Carpenters, Builders, Joiners, Building Mechanics—all Wood- workers. 1600 pages; 3700 diagrams; flexible; pocket size. Short-cut instructions, new methods, ideas, solutions, plans, systems—money saving suggestions. An easy progres- sive course for the apprentice. A practical daily helper and Quick Reference for the master worker. A Helping Hand to Easier and Better Work and Better Pay. To get this aid for yourself, simply fill in and mail the FREE COUPON below. INSIDE TRADE INFORMATION ON: How to use steel] ing strength of timbers; | to excavate; How to * Audels Guides worth square; How to file and | How to set girders and | use settings 12, 13 and | four times ther price— set saws; How to build | sills; How to frame} 17 on the steel square; | {0.247 pock- “a furniture; How to use| houses and roofs; How | How to build hoists and | et for refer- mitre box; How to use | to estimate costs; How | scaffolds—skylights; | ence.” W. J. chalk line: How to use | to build houses, barns,| How to build stairs; | Sstes.Mnex- rules; How to make| garages, bungalows, | How to put on interior pee joints; Carpenters’ | etc.; How to read and|trim; How to hang . arithmetic; Mensura-| draw plans; Drawing | doors; Howtolath—lay tion problems; Estimat- | up specifications; How | floors; How to paint. AUDELS PLUMBERS AND STEAMFITTERS GUIDES—4 VOLS. $6 A new set—just out! A practical, illustrated, Reference Library and Study-Course for Master Plumbers, Journeymen and Apprentice Steamfitters, Gas Fitters and Helpers, Sheet Metal Workers, Draughtsmen, Master Builders, Engineers and all Building Trade Students. 1670 pages; 3642 diagrams; flexible; pecket size. Guides explain all the principles, advances and short cuts of the Plumbing and Heating trade. Contains instruc- tions on how to figure and estimate jobs. Use FREE COUPON below to examine, with- out obligation, this valuable work INSIDE TRADE INFORMATION ON: Soldering, tinning. | tion, syphonage, tanks. | tilation, refrigeration. | “AvudeleGuides are prac- Joint wiping, bending, | Drainage, sewage, puri- | Water ‘supply, mains. pon me hr, understand, beating. Pipe—iron— | fication. Fixtures— | wells, tanks. ' Gas-fit- | {he"fela in plan steel, threading. Math- | bath—kitchen Pipe | tings Underwriters. | language.” WF. ematics, tables, phys- | fittings, soil pipe, tools. | Sheet metal work, prob- | Arminger, Ann- ics. Materials—iron,| Laying out work. | lems, methods,Brazing, po steel, copper, brass, | Roughing. Screwed fit- | heating, lead burning - Sheet metal— galva- Pipe bending, examples. methods. Blacksmith- lead, tin, antimony.| tings, flanges, joints. | Welding, various welds, + Rized—plate. Sanita-| Elbows. Heating, ven- | ing, forges, tools. | AUDELS MASONS AND BUILDERS GUIDES—4 VOLS. $6 A new, complete, illustrated trade reference library, for Bricklayers, Cement Workers, Plasterers, Tile Setters and Stone Masons, including a practical) outline of Steel Con- struction. 1100 pages; 2067 diagrams; flexible; pocket size. A practical Trade Assistant explaining modern methods of masonry construction. Easy to understand and apply. A — ene guna Weert a —y rw pe - Master Journeyman and Young Mechanic. Use FREE COUPON below and find out for your- "inde Masons Guide self, without obligation, whether this set will benefit you. a — A wy Foy INSIDE TRADE INFORMATION ON: Lange Fh a RF yy Bricklaying, tools, ma- | eling; How to figure brick | Piasterers agreement ; on terials; Brick designs, pat- | work; Safe loads, piers, | Plastering on various sur- | Ps terns, bonds; Setting | chimneys; Boiler settings, faces:Stonemas HO frames and foundations: | anchors, fire stops; Labor | $#°€S:Stonbemasonry ; Cut- Mortars, scaffolds, esti-| tables; Concrete, forms; ting, finishing, estimating mating: Mortarsand mor- | How to figure concrete | 8tone; Derricks, rigging; tar mixing; Tile setting, | work: Stucco—on old and | Stee construction; Fire mosaic, hollow tile; | new buildings; Plastering | proof; How to read blue Straicht edge test, trow-|— wood lath — metal; | prints. PRACTICAL ELECTRICITY — 1 VOL. $4 Learn More and You Will Earn More! le He ’ . Vy a . 7 — now your job and you'll never be without one. The : A idels Handy Book of Practical Electricity is a simplified Ready | gqitted man is always in demand. Knowledge is power Reference and Study Course in one pocket size, leather bound vol- | Learn your trade thoroughly by easy reading. This cou ime—for Engineers, Professional Flectricians and Students. 1040 pages; | pon is your opportunity for advancement and better pa 2600 diagrams; flexible red leather bound. A reliable authority and | You risk nothing in sending for Audels Guides for free handy helper for every electrical = Contains smpertens ane valu- | ezamination. Send it NOW! able wiring diagrams, calculations, = Complete in one machine sketches, helps on mainte- See ee eee \ handy, red leather nk fe a Oe aiam THEO. AUDEL & CO., I oday and find out, with- | 7 \, Sound volume out obligation, how this handy book | EXAMINATION 65 W. 23 ST., NEW YORK CITY - : . aily “ Please mail me for free examination will help you in your daily work the books marked (x) below. If 1 and » S £ ) elo ® a INSIDE TRADE INFORMATION ON: them satisfactory, I agree to mail $1 ir Electro-Therapeutics, X-Rays, | ‘ days, on each ‘set ordered, and to further mail $1 Shocks, Welding, Brazing, Radio monthly on each set until I have paid the purchase price. — ee —_ Pictures, son i 4 CARPENTERS | 4PLUMBERS 10one, Telegraph, Cranes, Bells, ae ey Pumps, Tools, Ship Drive, Hy GUIDES $6 GUIDES $6 ailways, Vehicles, Automobile Elec- ee tric Systems, Ignition, Generation, 1 ELECTRICIANS Lighting, Plant Management, Powe’ ' HANDY BOOK $4 ‘\, ¥\ Plans, Armature Winding, Repairing, A. C Motors and Apparatus, D. C. Motors and Ap- paratus, Alternator Construction, Dynamos, Wir- ing Diagrams, Sign Flashers, Cable Splicing, Power Wiring, Outside Wiring, Switches, Light- oiling, Rectifiers, Converters, Transformers, Fuses, | OME cicsecssonsdes Cireuit Breakers, Rheostats, Electro Plating, Electro- 1 * . ADDRESS ....cceees lysis, Storage Batteries, Magnetism, Electrical En- ergy, Conductors, Insulators, Static, Dynamic, Radio Electricity, Applications, Ready Reference and Index Covering the entire field of Modern Electricity. OCCUPATION. EMPLOYED BY

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POPULAR MECHANICS ADVERTISING SECTION 1Used to Earn Only *25 a Week- But it’s EFORE starting your course,” James T. Summers of Statesville, knew nothing about auto repair work. I have only a common school education but find your training so clear and easy that a child could understand them. I now own a good, paying business. Be- fore taking your course, I made only $25 a week. Now I make $50 to $75 and have good prospects for the near future.’ GET ALL THE FACTS! If you’re earning a cent less than $60 a week, get my Free Book now! See the amazing opportunities for QuUICK RAISES IN PAY in Automotive Field! writes Mr. i AUTO BOOK Send Coupon! *50 to *75 Now!” iis BIGGEST BUSINESS ‘* Get into this gigantic Auto Business! /7 YOU! Think of it—é Thousand Million D to Auto Men every year for upkeep alone why there are so many Opportunities for in Pay QUICK for the trained Auto Ma tunities waiting for YOU! If you want to? pay QUICK, clip coupon now. Common sc you need. [help youdoit. I give you Life ployment Service— Lifetime Consultation s« CLIP COUPON NOW! Send for this amazing FREE BOOK right \ how hundreds of men who never had a da Auto experience before writing for my others who had years of experience their salaries, making Big extra Spare-tir and getting into Money-Making Busir See how men like W. 8S. Yancey, Perla, Ark., can have their salaries boosted from $30 a week to $90 a week! LEARN HOW I TRAIN YOU AT HOME Don’t sell your time for low pay! You don’t need lo. Get my Free Book. Find out how you can become a Big Pay Auto man in QUICK time! Keep your present job. Stay home. You don’t have to leave your doorstep Master every Branch of Auto Work right in your own home. See how I train you QUICKLY and EASILY to BOSS the Job, or GO INTO BUSINESS where Big Pay comes QUIC K—and up to $10,000 a year can be made! own QUICK! Get all the facts! Send co B. W. COOKE, Directing Engineer, Chicago Motor ane Corp., 1916 Sunnyside Ave., Dept. 916 CHICAGO ie ¥, Soeee, Directing Engineer, hicago Motor Training Corp | “16 Sunnyside Ave., Dept. $16, Chicago lk: a me Ay E Auto B - mad) proof thet y a will Get the Full! Details of My) 4 WORKING! OUTFITS | OFFER Inc ludes I ne fo Z > as a trieal and 1 Au “ Also send y r 4 Outfite nica It is u ~4 rstood that thi bligates me in no mental Outf 303 Wiring

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POPULAR MECHANICS ADVERTISING SECTION G. Vincent was once a toolmaker! Today he is Vice-president in charge of Engineering of the Packard Motor Car Co., and one of the big figures in the automobile field ENTY-SEVEN years ago, J. G. Vincent, the Engineer. Today J. G. Vincent is Vice-president ner boy of Little Rock, Arkansas, was work- in charge of Engineering of the Packard Motor 1s a toolmaker. Car Co. le loved to tinker about and he had a natural Jesse G. Vincent is only one of many prominent men tude for the work of the machine shop. But in the automobile field who got their early training through knew that wasn’t enough. Fortunately he oo ga study with the International Correspondence lized in time that he needed specialized train- Walter P. Chrysler, Chairman of the Board of the in order to make the most of his natural Chrysler opera, also studied with the I. C. S. So 1; did J. R. Hall, Vice-president and Factory Man ager of the lity. So he enrolled for a course in Mechan Chandler Motor Car Co., and Hiram Walker, the Chief Engineering with the International Corre- Engineer. ndence Schools. E. V. (‘‘Eddie’’) Rickenbacker, America’s flying ace and ° ‘ 7 — Vice- aout it of the Rickenbacker Motor Car Company, Such a combination could not fail. In 1902 and Max H. Thoms, Supervisor of Inspection of the Marmon Mir. Vincent was made head of the toolmaking Motor Car Company, are other prominent men who once partment of the Universal Adding Machine studied with the International Correspondence Schools. In 1903 he was engaged by the Burroughs If the I. C. S. can help these men to succeed, \dding Machine Co., first as tool designer and __it can help you. If it can help other men to win then as Superintendent of Inventions. In 1910 advancement and more money, it can help you the Hudson Motor Car Co. engaged him as Chief too. At least find out how. MAIL THE COUPON FOR FREE BOOKLET INTERNATIONAL CORRES CNDSnCS SCHOOLS, Box 5687-E, Scranton, Penna. > Universal Untoeretty”” Without cost or obligation, please send me a copy of your booklet, ‘“‘Who Wins and Why,” and full particulars about the course before which I have ‘marke ix Business Management Private Secretary Ulustrating © Cartooning [Architect Industrial Management Spanish OC) French Electrical E . ineering os wint Reading [JPersonnel Organization Salesmanship )Electrie Lighting ntractor and Builder UTrafic Management |) Advertising Findechanical’ — re hitectural Draftsman Business Law C)Business Correspondence () Mechanical Draftsman }Concrete Builder Banking and [)Show Card Lettering () Machine Shep Practice jStructural Engineer Finance Management Stenography and Typing {Railroad Po ons }Chemistry Pharmacy DAccountancy Good English {jJGas Engine One ating tomobile Work (including C. P. A.) Civil Service [ )Civil Engine plane Engines ONicholson-Prouty Railway Mail Clerk i tee ing and d Mapping Navigation Cost Accounting Common School Subject f | Metal gy Ag ulture and Pe oultry (JBookkeeping [ |High School Subjects Hstesm natnceriog [ Mathe matics C) Radio Name Address esent Position Canadian address—International Correspondence Schools ‘anadian, Limited Vontreal

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10 POPULAR MECHANICS ADVERTISING SECTION Adventure.,, Thrills..,,_ ET away from the dull, prosaic grind of humdrum work— the narrow testrictions of petty, uninteresting jobs! Break into one of the most fascinating, most thrilling occupations since time began—Aviation—the virile, exciting, romantic game for meu of sporting blood! Many of the big men of the coming generation that are essential to your success And, the study of A our method is almost as fascinating as the actual work its« Lesson is chock-full of interest—and so absorbing that y forget you are studying. But best of all are the ultimat you are fitting yourself to gain! will be men with the foresight to get into Avia tion now—while opportunities abound. They can see that the Golden Age of Aviation has just begun—that the future is almost too stupendous to be imagined What other occupation offers you more amaz- Flying Airplane Instructor Airplane Engineer Airplane Repairman Send for FREE Book PICK YOUR JOB! Send the coupon for our new, free t Opportunities in the Airplane Industr vitally interesting, reads like a roman you things about this astonishing prof probably never even dreamed of You yourself at least to read it We offer youat ing opportunities? Thrills such a 1 never Airplane Assembler now, no obligation. Mail the coupon had fore—the praise and plaudits of the Airplane Mechanician today multitude—and a chance to get ' Airplane Inspector ground floor where rewards may b Airplane Builder Airplane Salesman Exhibition Manager Airplane Contractor Airplane Motor Expert Airplane Designer American School of Aviation Dept. 1359? 3601 Michigan Ave. Aviation growing so swiftly t hardly kee p track of all the aston developments ‘he skies are dotted with dar- ing young men-—irom every country come stories ot new feats—new victories—new heroes! Everything is set for one of the greatest booms in history Big fortunes came out of the automobile industry and out of motion pictures Big fortunes will also come out of Aviation! The development of Aviation as an industry is bringing with ic a call for trained men Those who qualify quickly should find themselves on the road to undreamed of money —success—popularity—and prominence Easy to Become an Aviation Expert! Get into this thrilling business at once while the field is new and uncrowded Now—by a unique new plan—you can quickly secure the preliminary training necessary to get a start in the Aviation Industry, either flying or ground work, at home during your spare time Experts will teach you the secrets—give you the inside facts CHICAGO, ILLINOIS sueeceny | aeatenen am 9 arena creas American School of Aviati Dept. 1359, 3601 Michigan A Chicago, Ill. Without any obligation please send me FREE boc Opportunities in the Airplane Industry Also infort about your Course in Practical Aviation Name Ag Address City SSSSSSSSSSSSSSSSES SSS SSSSSHE TERE SESS SRE REESE SEER EE EEE EERE eee ee

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ik al * ceeeseseaseadl Amazingly Easy Way to Get Into Electricity — — Coupon for Big Catalog Which Tells You How POPULAR MECHANICS ADVERTISING SECTION ll Learn Electrici IntThis Big New*2,000000 School in 12, WEEKS No Books No Lessons ven if you have not had an advanced education, or know nothing about electricity, Ican make you a master of practical ctricity in 90 days. Don’t let lack of funds worry you. Send for my big 56-page book, with 150 illustrations showing how yne Students learn by actual work in my shops. You work on real dynamos; you wind real armatures; you build real teries; you wire real houses. Everything real, with an instructor by your side. Get into the big pay class. Coyne rademves get positions leading to.$50 a week and up—many go into business for themselves and become independent. Act NOW! Send for My Big Book—Absolutely FREE! s Pres. My Course Includes lane Electrici ® COYNE ELECTRICAL SCHOOL, Dept. 97-72 Training in 500 S. Paulina St., Chicago, Ill. , Dear Mr. Lewis: Without obligation send me your big free catalog Electrical Y and all details of Free Employment Service, Radio, Aeroplane, Auto- 8 motive Courses that are included and how you will help me ‘earn SCHOOL 8 while learning.” | understand I will not be bothered by any salesman. 7 Not a Correspondence School H. C. LEWIS, Pres., Dept. 97-72 Established 1899 H 500 South Paulina Street, Chicago ' ““--------- ~ td City .-- —_—s aLEE . State _ —

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12 POPULAR LSittingon'Top of the World Toda You men, looking for something better —MORE MONEY! You can make the most money in Auto Painting. Here is the biggest uncrowded field in the world today. Prove it to yourself by the next 20 cars you see. Yes, sir, 17 out of 20 need painting. will have you ready in a few months Now—how many auto painters do you know?... i thought so. Well, who’s going to do the work? You are—after you get the right training and you’re going to make more money than you ever dreamed of! The world is looking for trained auto painters. Cash in on this big demand! You Can Own Your Own Business! Yes you can! With the information I supply you, you can make your dream come true. You can be the head of your own establishment. In auto paint- ing it’s no trick to be your own boss—own your own business and be independent! You don’t have to start out with the biggest building $end Coupon for G. King Franklin, Supt., American Auto Painting School, Dept. 901, 425 S. Ashland Ave., Chicago. Send sample shop-tickets free and information on how I may learn auto painting and Duco at home in spare time. J | i y : Name t Street No i City State Lem w ae eee eee eee ee MECHANICS ADVERTISING SECTION on the busiest corner. You can begin small with little or no capital, but I don’t know of another husi- ness where you can get big so fast. We show you how to open your own shop. Now—Make 60 to 90 Dollars a Week! Why plod? There are jobs that pay real money w men that know what I have to teach you. After y: training you can get a job anywhere. You can trave at your destination there will be a job waiting for you t! big money. Remember—I don’t forget you when you « the course. I help you get a real job. You also get consultation service without es charge 17,000,000 car painting. Justimagine! 1 P R 0 8) F t-w-e-n-t-y f-i-v-e m-i-l-] in the U. 8. alone—and 17 Chicago Duco says: “Skilled ¢ Jueo men are ax ean need priming, surfacing, | many at $1.25 ducoing, varnishing, striping an how Binks, one of the tery auto equipment man- ufacturers, says:” The big aut manufacturers are ir isisting that their de slers repai whole works—and take it fre teach you the whole works get in on the BIG MONEY refund every penny of the s used cars.” Stockt , av © Ton tee you pay i eens I realize that you are up agalr Believe plenty of work ¢ a problem in deciding what make paying business."" Nash enter, but on my say-so, and 1 ae ad go antee to you, just come i your graduates in repainting painting with me and you'll ! ars." Many any 1 like tall your life. Men like you these have taken my advice are now $5,000 to $10,000 a year LEARN at HOME! And the beauty of my proposition is that you can learn at home in your spare time-——evenings —and keep your present job while learning By my SHOP-TYPE METHOD you learn quickly and easily—-the greatest advance in home study training assures you success——no car needed—work on wood and metal panels which we furnish you! 13 big outfits of standard tools and materials given without ¢ extra charge— Get information now! Don't wait my big illustrated booklet FREE not be obligated G. KING FRANKLIN, Supt. American Auto Painting School Dept. 901, 425 So. Ashland Avenue, CHICAGO Get you will » pire Am e ti bett r it ..

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POPULAR MECHANICS ADVERTISING 4 (idarantecd Twin Service SECTION E Employment —then help- ing you get it, or money refunded ! Preparing you fora better job forA mbitious fags le”. & a Learn drafting—how to make and read plans, and the doors of opportunity in ng! all mechanical, building, and engineering lines swing open for you! There are more well-paid Drafting jobs open today all with | f You Are than in any other one profession or trade. There’s a variety, ier busi- a fascination to Drafting that will grip you. No other 1OW Vou Now Earn- work is so interesting, so well paid —no other field offers ae z equal opportunities for quick promotion. 0. C. MILLER ing $40 a . , ars Bd Lee Week The Draftsman is the Boss of the Works! eek or Less The I guarantee to prepare you Destroy blue-prints and plans, and the wheels of all American School ei een Industry will stop until new ones can be made. Every efirstin the home-study | spare time; then I guaran- move of every workman on the job is controlled by the to recognize the need }f tee to help you find such Draftsman through his plans. Railroads, public works, we pega nn ita courses Na Pepe ellg mee o buildings of a hundred sorts, machinery, electricity, get a .ct, if the training fails |} within 60 days after automobiles —all manufacturing and construction start ] ‘ plish the benefits you complete this ur xpect. Thus all risk and training, or I will refund = eliminated — either Phert * qubaion will help you to small amount you pay for on the Drafting table! That’s the kind of work to get into, friend. Where you have the same chance as anybody — better job and araisein pay tuition. We make this else to make a quick success! lv r it will cost you nothing. agreement to prove this painting rry out this import- instruction will make you . ¢ yr se v maintain o te- areal Draftsman. Back of - r yoy this guarantee are the en- \ - 1 . f Draftsmen al! tire resources and reputa- All this without tion of this million dollar ge to our students institution. , gre 4 3. C7 Professional ° ‘ . Outfit Given! yw king Bou wil! naturally expect O. C. MILLER he American School to give Director Extension Work obligation. a Cohen [Americarie)ychool nd tools with the Dept. D-974A, Drexel Ave. and 58th, Chicago —to prove you can learn at home in spare time! You'll be surprised how quickly you can learn Drafting by our new one-step-at-a-time method. We start you off by doing ac tual Drafting room jobs from the very beginning. Before you know it, you are batting out professional plans like a veteran, Get the first three lessons--the coupon brings tham. Do them. Test your ability to master Drafting at home. Without cost or of training. This od enough to use nally after you fin- r training. Mail cou- esc ription. ICAGO Ye eeeE FP Pee Tt pepe ey peepee ee ge LLL) " O. C. MILLER, Director Extension Work ; American School, Dept. p-974A, Drexel Ave. and 58th St., Chicago. . Your offer to send me three lessons free and facts about the oppor- ’ tunities in Drafting and about your course, looks good to me. It is Cas understood I am not obligated in any way in making this request. ‘ . pO ee exinatitelaseiseaiaiaiagnieanteanaglianpitiinedmenanstaah 1 pT ; salieceaiinesagiliid nati didi bcbaeiicehillie - Occupation.____.............. —_ - Age : bee wa.) | ff ET ET Pr ttt ee ee

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

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POPULAR MECHANICS ADVERTISING SECTION 15 Ir You Were Dying To-night red something that would give you ten years more to live, would you take it? You'd grab it. lows, I’ve got it, but don’t wait till you’re dying or it won’t do you a bit of good. It will then be Right now is the time. Tomorrow or any day, some disease will get you and if you have not yourself to fight it off, you’re gone. I don’t claim to cure disease. I am not a medical doctor, it you in such condition that the doctor will starve to death waiting for you to take sick. Can ine a mosquito trying to bite a brick wall? A fine chance. A RE-BUILT MAN io get the weak ones. I delight in getting hold of a man who has been turned down as hopeless by others finish a task that’s more than half done. But give me the weak, sickly chap t I like. It’s fun to me because I know I can do to give the other fellow the laugh. I don’t just eneer of muscle that looks good to others. I 1 both inside and out. I not only put big, mas- nd legs on you, but I build up those inner muscles nd your vital organs. The kind that give you nd energy, the kind that fire you with ambition rage to tackle anything set before you. All I Ask Is Ninety Days it takes years to get in shape? Show me the akes any such claims and I'll make him eat his | put one full inch on your arm in just 30 days. t wo full inches on your chest in the same length eanwhile I’m putting life and pep into your bone. And from then on, just watch ’em grow of thirty days you won’t know yourself. Your y will take on an entirely different appearance e only started. Now comes the real works. I've t my foundation. I want just 60 days more (90 i you'll make those friends of yours who think yng look like something the cat dragged in. A Real Man I'm through with you you're a real man. The t can prove it. You will be able to do things you ight impossible. And the beauty of it is you keep Your deep, full chest breathes in rich, pure air, ng your blood and making you just bubble over ind vitality. Your huge square shoulders and sive muscular arms have that craving for the a regular he-man. ‘You have the flash to your he pep to your step that will make you admired after in both the business and social world. no idle prattle, fellows. If you doubt me, make it. Go ahead, I like it. I have already done housands of others and my records are unchal- W hat I have done for them, I will do for you. Come ne flies and every day counts. Let this very day eg inning of new life for you. S end Forlty New 6F Page Book. It’s easy and watch him grow stronger. IT IS FREE =a DON’ EARLE E. LIEDERMAN ntains over four dozen full-page photographs | SEND ONE Dept. 2012, 305 Broadway, New York City yself and some of the many prize-winning ou hens Ee: Pleas e send ar with I have trained. Some of these came to me as ee gy gh t=» h ~ _ ver, a copy of your lates book, veaklings, imploring me to help them. Look “Muscular Development.” (Pleas t now and you will marvel at their present physiques. write or print plainly.) will prove to be an impetus and a real! inspiration to ll thrill you through and through. And it’s all I don’t ask a cent. This will not obligate you at all, N ie sake of your future health and happiness do not Send today—right now before you turn this page. EARLE E. LIEDERMAN POSTAL Dept. 2012 305 Broadway, New York City: WILL DO} City ame Street

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16 POPULAR MECHANICS ADVERTISING SECTION rom $30 a Week Bookeeper to 150 AWeek as of WILLIAM CLAYTON McCarrie Graduate And His Own Dental Laboratory SP The following is reproduced from a letter we received. The original is on file in the McCarrie School in Chicago Dear Mr. McCarrie: I was bookkeeping up until January, 1924, at $1500 per year, and while having lunch one noon, I picked up a “Popular Mechanics’’ and ran across your ad, which fascinated me very much, Although making a good living at the time, I was not entirely satisfied, so I wrote for your literature Upon recetpt of the above, and hav- ing read t& very thoroughly, I could not help but admit I was quite enthused. Two weeks later I arrived at your school Completing the course in August, I returned You Have the Same Opportunity— Learn Mechanical Dentistry Follow in Clayton’s footsteps! Read his inspiring letter how he jumped from $30.00 a week to $1: 90.00 a week! M McCarrie graduates are doing the same! Larson writes. “Our laboratory has averaged about $800.00 a month profit sinc first of year—not bad for two of your boys who have bee: home where I received a position in business for only a year. Ostrander says, “I earned as high as $4 in a_ laboratory After a few profit in a single day.’’ Another McCarrie man sends us this mess \ months experience, I got connected trick for me to make $20.00 a day.”’’ Our free book tells many mor with Dr. L , with success stories like this—write for it today! whom I stayed two years, resigning my position to open a laboratory of my own, October 15, 1926 I have ten dentists on my list which net me about $150.00 of business per week, with business increasing rapidly Thanking you hardly expresses my appreciation of your most thorough course Your promises were more than fulfilled, and in closing I want Day or Night Schools—All Personal Instruction —Nc Books—No Classes—Work Your Way Thru School—We Help You To Spare Time Job to state that’ there is a large field Enter this fascinating profession— Will you accept this big op) open for your graduates. I remain, assure yourself steady employment the The dental profession need A Successful McCarrte Graduate. year round—work that is highly con- has grown so fast that the (Stoned) genial and dignified! Associate with a mechanical dentists far ex William H. Clayton fine class of people! Earn a splendid supply. Here is specialized t the finest sort! No mecha necessary—no special e« requirements—and a q reward! income! We have hundreds of testi- monial letters on file from enthusiastic McCarrie men who have made good. SEND FOR INTERESTING BOOK pa- Read absorbing facts about mechanical Dentistry—the laboratory bench work that the dentist turns over to the laboratory worker, the making of plates, crowns, bridges, ete.—why 64,000 dentists need laboratory work —how we train you in a few months, day or night, for this uncrowded, moneymaking field! : Work Your McCarrie Schools are located in Chicago, [Way Thru /4 Detroit, Cleveland, Philadelphia and Boston. |heip “You Y7 ‘ation about how I may becom Get Spare chanical Dentist, how you will MAIL COUPON TODAY [rime som f 7h othe ae tie Take my coating, No obligation—no cost! Mail coupon today and get 4 your free copy of this handsomely illustrated, interesting # Name book. Complete details of our special offer—low rates—easy Jf terms. ‘Send coupon today! Fs we wk. FD McCARRIE SCHOOL OF MECHANICAL DENTISTRY P Dept. 148 1338 S. Michigan Ave. CHICAGO, ILL. Z ee JWisdadeees uxaseee sees McCarrie School of Me chanical Dentistr 1338 S. Michiréan Ave Dept. 148 Chica i Without obligation, please your free Book with compl axy> 4cv°')> 477) sa fr tit fr» i1ary ~~.

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M “Our it Since ve been h as $4 e: *'N iction Way e Job | of Me- str in Ave cago, Ill POPULAR MECHANICS $7, 000__ 6, 000___ §,000___ 4,000__ §3,000__ §2,000__ $7, 000__ § 750— § 500— ADVERTISING SECTION 17 NOW) ised My Pay 100% JhisAmazing Bok Showed McHow This is Perhaps the Most Remarkable Book Ever Printed. It Has Proved the Turning Point in the Careers of Thousands Who Were Ambitious for Bigger Pay! If You Ever Aspired to Earn $10,000 a Year or More—Read It Without Fail! 1 imagine how a man feels when his earning c — ity ly jumps 700° in afew months? Can you in ild feel if your salary suddenly became sev« ‘ae ; never before? xactly what happened to O. A. Jones of Charleston, fter reading the amazing book pictured above Be- vers, he discovered something he had never even vefore 1 certain force that lifted him out of the i set him on the road to $10,000 a year! Not at all his surprising book has done the dreds of others. For example, F. N. Hiatt of Cal read it and quickly saw the way to raise his earnin It led Robert Ellis of M wssachusetts into three pron tre bled his former salary. Sending for this remarkab! s the first step that elevated M. J. Ebeling of St. Lo erkship to the presidency of a large manufacturi THE SECRET OF BIG EARNINGS id they do it? What did the book show them? Just r one of these men realized that a knowledge of s| ip and the ability to sell brings bigger rewards than g else in modern business today! But until they saw te of this bool Modern Salesmanship’ tt idea that they, too, could win quick success thro hip. They believed that this golden field s forever barred to them. But they were wr inusual bool pened the way to the success that tl despaired of attaining! SALESMEN ARE sired BORN! in of ordinary intelli » can become a su ave Sant is 1 le irme 1 the ilphabet, 1 rets ft selling as taught bv the National Sales ning Associati uit for yourself. Salesmanship is governed b ws There are ertain ways of saying and doir 1 men act uu want them to: certain ways exactly what you go after! Once you ha these fundamental rules, your success is govern energy ind ambition! RI . 51G DEMAND FOR TRAINED SALESMEN | traveling sales positions are open in every ling ll intry. For years, thousands of leading fir called on the N. 8. T. A. to supply them with sale ployment service is free to both employers and met thousands have ecured positior through this ser If we were asking two or three dollars a copy f lods Salesmanship you might hesitate But it is now I R I b W cannot urge you too strongly to take advantage of this opportunit to see for yourself what salesmanship has done for other ind wl it the National Salesmen's Training Association stands ready and willing to do for you No matter what your opinion is now M ern Salesmanship’’ will give you a new insight into this fa nating and highly-paid profession Mail the coupon now! ATIONAL WORLDS OLDEST _AND LARGEST LESMEN‘ ASSOCIATIO "A i) Dept. W-100, N. S. T. A. Bldg. Chicago, III. POSSESSES ES EEE SE SETHE TEESE eee ee Ee, . . . . : National Salesmen's Training Association s § Dept. W-100, N. S. T. A. Bidg., Chicago, I1., U.S 4 . , ' > " pont } 5 . . Please mail me FREI strated boo Tode s ® manst ‘ ticulars > ir . § manship ind particula ir : s and its ree Employment Se . . . . . s . . . . . . . e -va . . . . . . . . . . . ese Ad . . . . . . o . . . . s ( s e . . . . . . 7. . . ® Age ra nat . . . PSSSSSSSSE SSS SSSSS SESS SESS SSEESTESE TERE REE TEESE Eee

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18 POPULAR MECHANICS ADVERTISING SECTION World Taste Romance and Adventure §n the Far Lands of the Earth> How often you’ve longed to see for yourself the awe of Egypt s pyramids—the beauties of the gorgeous Med iterranean sunset—the squalor of China's an- ent citi Spend a few years, or the rest of your life, tasting high ad- re on the seven seas and in all the world’s great poste roving earth’s highwa and by avs! You can doit FREE all your xper and earn a good salary besides! Onl fession will carr yu around the world at will, trav- ng lik entleman, but that’s the most interesting and pleasant rk ther i Radio Operating! Easily and quickly learned, re's other profession like it for the man who wants the ex- periences and pleasures of world-travel Radio operators are needed all sea-going ships like the one shown here must carry from one a dozen or more. Take « Look the Skyline Without « Pennys Expense Radio operators aboard oce: an liners live luxuriously y rank as officers of the ship. Meals, a private cabin, ll other living 7 are furni hed tree, and besides the operator lraws a good salar ou can learn quik kly and easily at home in our spare time =% be a Radio operator through our practical train- ing methods Take a look at the FREE BOOK which tells how— nail coupon below This U. S. Government-recognized school has been training suc- cessful operators since 1914 Our graduates are all over the world We maintain an Employment Department to help put you on your wn ship The world-famous NATROMETER, our own patented nvention, obtainable onl} y by students of this Institute, is recognized as the best and easiest way to learn the Radio code: A few short months, with the aid of the fam us Natrometer and our quick home training, and you too can be a fully qualified Radio operator, sitting n your cabin like the one howe above, bound out for Liverpool or Nagasaki! F : Read the Free Book that tells all about this fascinating profession and our practical Government-recognized methods of training you for it Send coupon TODA Y—no obligation. Special tuition offer now on, includes world-famous Natrometer free of extra cost with our course! Act at once. NATIONAL RADIO INSTITUTE WASHINGTON, D. C. SPEQIAL @PFER GOUPet National Radio Institute, Dept. PP-85, Washington, D.C. Gentlemen: Without obligating me in any way send me your free book and informa- tion about your offer of Natrometer with course. —t he | | on World-Famous Natrometer Name. ..s Address DRAWING COURSE for $2500 $20 Haven't you often wished that you could dray illustrate some idea, sketch some pretty You can do all of these things. One of . most famous Cartoonists and illustrat 4s 5 de i veloped a great, simple system for success in branches of Commercial Art. This system }. revolutionized the entire theory of dr: Ww It means that drawing can be as easy for you » writing — much simpler than learnin, shorthand, bookkeeping or ty pewriting We are now placing this origina! syeter for learning Drawing, Art and ( onins consisting of 34 lessons with over 500 illustrations within reach of every one. If you will d« € a few hours each week to the Course WE ABSOL (7 ELY GUARANTEE that you will learn to draw ang draw well before you have half finished ths If we fail to make this claim good, we w every cent paid us. By eliminating a lar force for answering correspondence, exper at. alogs, etc., we are enabled to make a price of $2 0s the cheapest price ever known for a his home study course. Many have sent us let ilar to that of Rob't P. Davis of Detroit, y “*I can't see how you ask so little. I expected.” Learn to draw. It is a no matter what field you are in. Send No Money Just order the course and on arrival pay postman $2.98 plus a few cents postage, payment in full for the entire Course and Drawing Outfit If not entirely satisfied, return within five daysand we will Refund Money. Address: LEDERER SCHOOL of DRAWING, Dep!. 5318-F, Chattanooga, Tenn. Orders from outside the U.S. A. are payable $3.28 cash wit Mount Birds SD AATRAARAANANANATAN NAN IANNV’NV IM NAAIAAANAANN EELS Learn at home by mail, to mount birds, } animalis, game heads; tan furs, make rugs and rebes. Complete lessons. Easily and quickly learned by men, boys and wome: Write today for Free Taxiders my Book. Tells ai! about it Sportaman, Hunter, Trapper und 3 If you order the j once, we wi ir a | drawing outfit | of artist's p« paper, erasers tacks, ete.. ena g Lo go to work wu additional c« any | } | as VN VIET ¢ I Nature lover shou'd know this wonderfwi { -} ing art. Save your trophies. Big profits : guaranteed. Our school is 20 years old ~1! graduates. Investigate today. Weite for Free Northwestern School of Taxidermy 9379 Elwood Bidg., Omaha Neb J SSS road Learn Auto Mechanic, Auto Electrical, Bactery ee Electrical, — ~ ge Se T iling Plast umbi elding oo Card, Sign Painting Window Dressing, Pine And Commercia! Ar Write for Catalog 50. BROOKLYN ENGINEERING INSTITUTE (Operated by Bedford Br. Y. M. C. A 1125 Bedford Ave., Brooklyn. New York Ciry Ee for my free book ‘‘Millard’s Advanced Natural Corrective Course’’ and a free copy of my speech ve. 10,000 cases successfnily treated cat. 28 ¢ yenss. a echool for stammerers in world 7 Millard Bidg., Milwaukee, Wis. BECOME A RAILWAY POSTAL CLERK Men—Boys 18 up—FExaminations coming $1900 to $2700 a year. Steady life-time job. Comr education sufficient. No “pull” necessary. Ma eecece, ©Oupon for Catalos “eA. R. PATTERSON © Civil Service Expert Patterson Schoo! A. R. PATTERSON Civil Service Expert PATTERSON SCHOOL % Dept. 812A, ROCHESTER, N.Y. SIRS Send me without charge your Catalog describing this and other S. Government positions Name Address

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2—. rtoor ete Linericg '. S has de. “S85 In al! tem has ving. Jt T YOU as learning Writing System Oing | r 1UOns, © a few CTELY raw and a. Neb Seanad Bactery Tiling. V eiding, ainting tal Arr. ITUTE 7 rk City POPULAR MECHANICS ADVERTISING ? > | = RT OB Be Perpetual Loose-Leat - ENCYCLOPAEDIA & Research Bureau for Special Information What You Get in Nelson’s Loose-Leaf Encyclopaedia: ymely bound, beau- printed encyclopaedia new now and will al- 4 up-to-date. More lv illustrated than any cyt lopaedia. it itive artic les on mceivable subject. graphies of promi- en and women—both and the past. plete Atlas of the including up-to-date ind population data. formation that can al- be substituted for obso- tter—by means of the eaf binding device. Index Volume, containing ‘00,000 references — so tive that every item, g toany subject, can be linstantly. FREE Reader’s 33 full-study college es On as many subjects. Membership in Nel- Research-Library Serv- sureau for special ition on any subject. ENCYCLOPAEDIA A LIFE-TIME Progress depends upon Your use SE your spare time—if only a few minutes a day — acquiring valuable in- formation to know the world in which you live. Don’t guess—know the facts! Knowledge of facts means time saved and mistakes avoided. Facts are the keynote of every truly suc- cessful career — wisdom in a larger sense is founded upon facts! Get your facts from Nelson’s—and know that every one is correct, right down to date! Remember, the value of an encyclopaedia de- pends on its up-to-dateness; and fast-bound encyclopaedias must necessarily be out of date alway “wu Vo, Nelson’s Perpetual Loose-Leaf En- This Coupon of Your SECTION 19 * Let Nelson’s help improve your leisure hours. The habitual use of this wonderful Encyclopaedia means a broadened intellect—wider and deeper knowledge upon every sub- ject investigated—skill in discrimi- nating between facts and theories— the development and strengthening of a logical mind which enables you to grasp larger things in life! In all your daily undertakings, ‘“‘BE SURE YOU ARE RIGHT — THEN GO AHEAD.” Check up your facts with Nelson’s! Because of the patented Loose-Leaf binding device, every fact you get from Nelson's is not only authorita- tive, but always up-to-dat rhe ONLY encyclopaedia of which this is trt spare time x cyclopaedia is ALWAYS UP-TO- DATE—“it never grows old! This great American Encyclo paedia is considered an authority in the Library of Congress, U.S. Senate, U.S. Supreme Court in libraries, universities and schools in every State in the Union; and in thousands of homes From the dawn of history to the present day, every field of knowl edge is covered. Every article is clear, concise, authoritative prepared by an expert. And Nej- son's patented Loose-Leaf binding device keeps every article—every individual tact — correct, right down to date. Nelson’s is the only encyclopaedia with this vital fea ture—it changes and grows as the world progresses—it LIVES! THOMAS NELSON & SONS Publishers Since 1798 Originators of the Loose-Leaf Reference System - | | | ] P.M Dex 381 Fourth Ave., New York City PUES YOU UN- | send me FREE your Book of Specimen Pages with full der no obliga- |e Kt the Sana 3 * . . | tion. Mail it | * . | TODAY! , 5 | 4 Vels )

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20) POPULAR MECHANICS “I’m soing to raise his salary” “I’ve had my eye on him for some time and 1 know he can handle bigger work. “He studies those I. C. S. textbooks every chance he gets, and I want to tell you it has made him a valuable man for this business. “I’m going to raise his salary and give him that new job we were talking about. I wish we had more men like him.” How do you stand when your employer checks up his men for promotion? Does he pass you by as just a routine worker, or does he think of you as a man who is ambitious to get ahead? Won’t you be far more likely to get the promotion if he knows you are studying at home and are really preparing yourself to handle bigger work ? Think it over. Then act. It takes only a moment to mark and mail the coupon and find what the International Corre spondence Schools can do for you, yet that one simple littk step may be the means of changing your whole life. Mail the Coupon for Free Booklet ° INTERNATIONAL CORRESPONDENCE SCHOOLS “The Universal Unirersity’’ Box 5690-E, Seranton, Penna. Without cost or obligation, please send me a copy of your book- let, “Who Wins and Why,” and full particulars about the course before which I have merked X in the list below: BUSINESS TRAINING COURSES Electrical Engineering Electric Lighting Mechanical Engineer Mechanical Draftsman Machine Shop Practice Railroad Positions Gas Engine Operating Civil Engineer Surveying and Mapping Metallui gy O) Mining Steam Engineering seesseseces) cS ee Street Address..................0000 ‘ City Occupation Persons residing in ‘Conada should send this coupon to the tional Correspondence Schools C« H Business Management Salesmanship Jindustrial Management Advertising (Personnel Organization C Better Letters L)Traffic Management ()Show Card Lettering (Business Law | JStenography and Typing {jJBanking and Finance Management [)English LlAccountancy (including C.P.A.) LJ) Civil Service [}Nicholson Cost Accounting (JRailway Mail Clerk () Bookkeeping L)Common School Subjects L) Private Secretary L)High School Subjects Spanish 0D French (JIllustrating OC Cartooning TECHNICAL AND INDUSTRIAL COURSES Architect Architects’ Blueprints { JContractor and Builder Architectural Draftsman [ }Concrete Builder Structural Engineer ‘hemistry [) Pharmacy _JjAutomobile Work | )Airpiane Engines 8 _JAgriculture [ Mathematics C) Navigation 0 Radio Interna- unadian, Limited, Montreal, Canada ADVERTISING SECTION | Electrical Engineering Course for men of ambition Students construct mot: in- and limited time. Over 5000 stall wiring, test electrical men trained. Condensed machinery. Course desi red course in Theoretical be completed j ne and Practical Elec- college year. Prepare trical Engineering in- fer your profession in cluding the closely the most interesting related subjects of city in the world Mathematics and Est. 1893. ( ig Mechanical Drawing. on request. Bliss Electrical School MUSIC LESSONS 18s HOME oe Yoo cam mead Tuam Lket Write today for our FREE booklet. It tells how to lear: play Piano, Organ, Violin, Mandolin, Guitar, Banjo, etc. Beg ers or advanced players. Your only expense about 2c per day for and postage used. American Schoo! of Music.51 Manhattan in Bide. Chea [= $1.00 for Laugh Producing Program of 23 Trick Drae ings with Instructions. Catalog of Chalk Talk Sup; BALDA ART SERVICE, Dept. 1 alt Supp ine Fr LEARN WATCHM AKING and become independent. We help you sect Easy to learn. page or Peas sT.Louls WATCHMAKING SCHOOL o ST. LOUIS, mo LEARN PHOTO-ENGRAVING Earn $200 to $500 monthly. Photo-Engraving and raphy taught by largest college of its kind in the wor tablished 1893. Big demand for graduates. Write for free book Illinois College of Photography, Box 4127, Effingham, III. A GREAT BOOK FREE | WITH THIS LIBRARY! For a short time only we will give every subscriber to t Library of Machine Shop Practice a copy of French's Eng ing Drawing—the greatest book on mechanical drawi: written. This book makes drawing as plain as day—t« all about instruments, plans and methods—and prep 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 librar) The New Machine Shop Library is written for practical m ives you the best meihods for every kind of machine sho; ft explains machine tools and their operation, drawing and tool work, gears and grinding, jigs and fixtures, automa! machines and their toois and all of the mathematics you © have to use. It is plainiy written, completely iliustrated—t best kind of help to the machbine-shop man who wants to No money down— only 7c ire a posit CATALOG ent. 5 himself Sent F R E Eo [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 Practice If satisfactory, I will send you §2.50 in 10 days and $2 m until the special — Og $22.50 is paid lf not wanted, I will retu On receipt of my fret ‘papqent of $2.50, It is understood that I am to rec« ; free of charge, a copy of French's Engineering Drawing | I | books at your expen | rT a,

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1am, Ill ice ‘ations li brar ew York hine a. etu o rec

POPULAR MECHANICS ADVERTISING SECTION

uddenly | Broke Awa and Held Them Spellbound As I review that tense dramatic moment when I electrified that meet- ing, it all seems strange and weird to me. so miraculously in three months from a shy, diffident to a dynamic, vigorous he-man? Three months before nobody ever knew I held opinions! opinion? was pos ibou WW I 1 been cursed with a shy, timid, self-cor W tl nis a gral I al sci Ol eau ition is in a coherent, self-confident way vspaper article whicl told dH Work W Mh widespread comment fron I rea t only by million It discussed men like me 1 ‘ me our handicaps eptica I tl ght these defects we ' I would never be able t su net kept prodding me t I lost no time in sending for it, as I be to get st free a book tl ts that most successtul men have , distinct I money and success nscio i iit ot ‘ ivf il power that I never n the general meeting wh ed department heads and posed 1 policy

WHAT 20 MINUTES A DAY WILI SHOW YOL to talk before your club or } ‘ to address board meetings to propose and respond to ists o make a political speech » tell entertaining stories make after-dinner speeches © converse interestingly > write better letters © sell more goods to train your memory to enlarge your vocabulary to develop self-confidence tration to acquire a winring person- to strengthen your will power lambition to become nker to develop your power of con- a clear, accurate to be the master of any situ-

en the president ¢ rressiVeness, nad na issistants I¢ dreamed I possessed of new physica i resur ind I absorbed the principles of I na Phen r sugee Three months pre viously, the forces indecision, timudit ind inability t ‘ public would ha held The ’ my sé But suddenly tl new power TOOK ] session of me arove me t my te That wonderf 2 minute day rain it home had tau me to forge myst and think only of 1 subject. Almost aut matically the which had heret« lain dormant mental jumble, issued with a clearness and entht siasm that ast me no less tha i Ww How had I changed ‘‘ves’’ man How had I ever dared give my American Institute 1359 North 3601 Michigan Ave Dept Chicago, Illinois NORTH AMERICAN INSTITUTI 3601 Michigan Ave., Dept. 1359, Chicago, Illinois Please send me FREI { withou tion my cop regarding ir SEC RT ETERS SER ER ERE EERE eee boss and associates And I noticed wit ent exultat raj nt K a 1 t sr i ley nt To-d r wh I | | meet wit! ‘ir ; I i inche ing i l I And m s made me a I l meeting worth-w ' | good I ar t I Ar L frankly rd ca I bless s t that w ‘ / | WW Wa MW Send for This Amazing Book hi new metl od of training ful descr ed in eT terest ‘ nd informative booklet whic w being sent to ever ne mailing the coupon below rhis bool called H t ! j | ) N Ss . ——— i You e told how t ring it and ow Jen |. yond -$- 4 -~ FREE / natural gift. with ’ vill w j l d ce ( Jo Work vp t I I b l r fos ders with pop rit Istand words owe» l real suc < You t ta ¢ aaa / y Satie - er ; thie e

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POPULAR MECHANICS ADVERTISING SECTION IN DRAWING CARTOONS Why spend your time doing work that is drudgery, and get little money for it when you may be able to draw cartoons for Big Pay”? Learn cartooning at home with this simple, tested method. Many students earn money while learning Become a_ high-salaried one of the easiest, most pleasant, and best paid of : Millions of dollars spent last year on serious, comic and animated cartoons—and the demand for cartoons increases every day! Hundreds of cartoons now used by big national advertisers. Learn Cartooning at Home In Spare Time—Simple, Tested Method There is a knack abcut learning cartooning which you can master in your spare time with this simple home study method It starts you at the very beginning—on simple fundamental principles—then takes you through every branch of humorous and serious cartooning You will be surprised how quickly you can draw cartoons that will sell. Many earn even while learning Send for Free Book Get this handsomely illustrated booklet which gives the details of this remarkable home study course in Cartooning. Gives thorough outline of the cartooning field and market for cartoons. Shows how to become a cartoonist No obligation. Send for it today. (No salesman will call.) Washington School of Cartooning Room 3012E, 1113—15th St., N.W., Washington, D.C. The Last Word in RADIO Radio is an exact science, yet so new there is still much that is rect and unscienti/ present equipment results are faulty tion and complaints To meet this nex have compiled the facts covering the scope of radio scienc every type of receiver into one big, fine, ney With it you can now Be The Man Who Knows! DRAKE’S RADIO CYCLOPEDIA 5 . Solves the Dealer’s Service Problems If you design, build, repair or service radio rece need this book All subjects alphabetically arrar hundreds of cross references so you quickly find w want. 1672 headings, 985 illustrations, 871 pages ng else like it It is the book of radio, just TODAY. $6.00 postpaid Also for sale at al Big catalog of useful books sent free. FREDERICK J. DRAKE & CO. Publishers 1010 S. Michigan Bivd. be ok. Chicago LEARN PIANO TUNING AT HOME “> Send for FREE copy of the 30th AN- = NIVERSARY EDITION of our book, iii “Winning Independence’. Read how r students master tuning with our —_. 100 “WD TUNE-A-PHONE, and WHY our graduates head the prof all _ of the world. With Bryant's patented devices, to and lessons, one learns quickly and easily Low tuition: ea Diploma granted. MONE Y-BACK if notsatisfied. $10.00 1 a day, exceptional opportunities and an ideal profession aw BRYANT SCHOOL OF TUNING, 31 Bryant Bldg., Augusta, Michigan MEN WANTED TO LEARN Motion Picture Projection : $2,000 to $4,000 a Year Quickly learned. Short hours, big pay. Best equipp« in Michigan. Projectionists for Movie Houses and Road Shows MOVIE OPERATORS SCHOOL 61 Sproat Street, DETROIT, MICHIGAN LEARN WAT CHMARKING 4x0 ENGRAVING BY OUR PROFIT-SHARING PLAN OUR GRADUATES SUCCEED One of our Iowa students started in a very small way—* "| ing over $30,000 a year Another in Wisconsin, ower $1( | first year Day or night classes. Call or write for FEF Ki Chicago School of Watchmaking, Dept. 3501, 4844 Lincoln Avenue, Ci1|CA60 | Washington School of Cartooning Room 3012E, 1113—15th St., N. W., Washington. D. C. Please send me without obligation, your Free Booklet on Car- tooning and special offer to cew students Nam Age V (State whether Mr., Miss or Mrs Vrite Name Plainly.) Address. City “ACCESSORIES set all kind PRES. AMERICAM AUTO & RADIO MFG. CO. Dept. 264 American Radio Bidg. —tenitmen frie RE

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POPULAR MECHANICS ADVERTISING SECTION oree ~__» SHIPPED FREE “A setof HAWKINS GUIDES is a true , Dew friend to the electri- 1 Who cal worker. It tells you how to do any job the . right ws av—without guess- D lA ing or taking chances. Hawkins Guides put all the facts about mod- lems eering at your finger tips Therefore your ( the electrical field are unlimited. HAWKINS GUIDES DOUBLE YOUR VALUE Fr Electricity is king! It is the ruling force of to- day—transportation, com- munication, light, heat, power —indeed every modern activity is dependent on electricity. In- dustry is crying for electrical men that know their jobs! Hawkins Guides teach you all you need to know about electricity in easy, step-by-step lessons. Daily spare time read- ides will greatly increase your value to yourself jloyer in a few weeks. Hundreds of our friends have ‘written us and told us this! READERS OF HAWKINS GUIDES KNOW HOW IZ “You can’t § stump him on an electrical job.” “He certainly knows his busiriess.”” “Certainly have to hand it to him for knowing how.” —These are the things employers say about our friends who are readers of Hawkins Guides, No matter what question or prob- lem comes up the Ready Ref- erence Index enables you to give an expert answer at once. HAWKINS STARTS \' YOU WHERE OTH- i i ERS LEFT OFF | hy should you work at low wages when —now doe | fae -asy reading of HAWKINS GUIDES will give you > =e, incement in IEE BOOK => the ‘money v-making knowledge of the ex- ye, CHICAGO pert sy daily reading of the Guides will teach es } n a few 1 ths what it has taken the expert ~ o ke S H AW KINS GUIDES in hand you have a ncaa start to success in the electrical field 1 will actually begin where others left off! This coupon isyour golden opportunity. Tear it out— send it nc-v! als Rice x. — Study Course and Pocket Library *10 FOR EXAMINATION! REAL ELECTRICAL EDUCATORS “Hawkins Guides at $10 is the made. Am able to take up almost never gone to an electrical school." Texas. best investment I have ever any electrical job and have B. Roessler, Oenaville, AS EASY AS A. B. C. “Everything in Hawkins Guides is very pie. and can read and understand them as easy as A. B. _ Tobyhanna, Pa. OTHER ENTHUSIASTIC READERS SAY “Worth ten times their price.” “Helped me to two raises in four months “Better than a school of instruction.” “Studied them when I was laid up and got further ahead than if I had been on the job.’ Hawkins Guides Explain These Points So You Can Easily Understand:— Magnetism—Induction—Experiments—Dynamos—Electric Machinery —Motors—Armatures—Armature Windings—In- stalling of Dynamos—Electrical Instrument Testing—Prac- tical Management of Dynamos and Motors— Distribution Systems—Wiring—Wiring Diagrams—Sign Flashers—Stor- age Batteries—Principles of Alternating Currents and Alternators— Alternating Current Motors—Transformers Converters—Rectifiers— Alternating Current Systems—Cir- cuit Breakers—Measuring Instruments—Switch Boards Wiring—PowerStations—Installing—Telephone—Telegraph —Wireless—Bells—Lighting—Railways. Also many Modern Practical Applications of Electricity and Ready Reference Index. Ha kin G ides 10 POCKET SIZE WKINS GUIGES—numeers Each number easy to carry around and read in spare time. Big type and clear diagrams. Easy to study and learn. Durable, flexible binding—gold edges 3,500 pages—4,700 illustrations Shipped free for exami- nation. Pay only $1 a month if satisfied. Price of set, complete, $ anybody night, EXAMINE GUIDES FREE! et the Guide monstrate sod &. tical value t u—as idy course, refer- ence Ww vork and complete electrical library. You are the judge. Simply ser iscoupon. No obligation nless you are entirely satisfi Tear out on dotted lin—mail it NOW! Theo. Audel & Co., 65 bo card St., New York City Please send me (postp y appro. | Rowkins Electrical Guides, 10 numbers price $1 « if satisfactory I will mail y« 0 "$1 in 7 day ind further mail $1 monthly until purchase price of $10 is a EXAMINATION COUPON Occupation Employed by

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24 POPULAR MECHANICS ADVERTISING SECTION Play the HAWAIIAN GUITAR and be Popular | / Play all the latest hits just as the Hawaiians do. Be the most popular member of your set. Get in on all the good times. Entertain _— friends—or play pro- essionally. Be in demand everywhere. We will help $15“ © HAWAIIAN GUITARY with Genuine Seal Grain Fabrikoid Cover This sweet-toned, mellow Hawaiian Guitar wonld cost you at least $15 in any music store without the Genuine Seal Grain Fabrikoid Case. We can af- ford to give you the entire outfit free when you enroll, including picks, steel playing bar, etc., because we make them in huge wee quantities in our own factory. Noth- " ing to buy —everything is furnished. Learn in Spare Time at Home You study in spare time—when you like—as long as you like. And even if you don't know one note from another, our method is so simple, plain and easy that you begin a piece your first lesson. In half an hour you can play it! Famous Native Hawaiians Teach You You receive expert instruction from such world famous players as Kolomoku, Kalaluki, Ferara and Seville. They quickly teach you the secrets of this fascinating instrument. Complete Conservatory Course. You get 52 complete printed lessons. Nothing is omitted. Pictures explain every move. And no matter how little you know about music when you begin, no matter if you have never touched a musical instru- ment, you can positively learn to play by our plain, easy, pic- ture method Only 4 Motions to Learn Then you can play any music—popular songs, classical, old-time melodies, native Hawaiian airs—or feal jazz—separately or with accompaniment. You'll never be lonesome after you learn to play on this beautiful Hawaiian Guitar. Pay as You Piay Our Written Guarantee We make it easy for you. You Weguaranteeinwritingtoteach start any time—with a small you. 45,000 successful students. first payment—then pay while And we coach and advise you Icarning. Write for liberal offer. after gradvation—no extra cost. and other courses—Violin, Tiple, Tenor Guitar, Banjo Ukulele, Tenor Banjo Ukulele—under well-known instructors. Write for fufersaation. —— FIRST HAWAHNAN CONSERVATORY OF MUSIC, INC. Sth FI., Woolworth Bidg., Dept. 448, New York, N. ¥. Approved as a Correspondence School Under the Laws of the State of New York ACT! Mail This Popularity Coupon NOW! FIRST HAWAIIAN CONSERVATORY OF MUSIC, Inc. Sth Fl., Woolworth Bidg., Dept. 448, New York, N. Y. Please mail full information about your 62-lesson Hawaiian Guitar Course. 1 am not obliged to enrol! unless | want to Name Address City State I CAN make a good penman of you at your home during spare time, no matter where you live or how poorly you now write. My sim- plified system has shown thousands of others the way to good penmanship during the past twenty years — at can and will do the same for YO Beautifully Illustrated ~~ ** How to Become a Good Penman” It contains general infor- FREE t mation,with testimonials and beautiful specimens of penmanship showing what others have accomplished by the _tamblyn System. (Ye ur name elegantly 7 ra tf you On close stamp for postage.) Wi RITE Topax. Address F. W. TAMBLYN 418 Ridge Bidg., Kansas City, Mo., U.S.A. Bea drummer! Trap Drumming made easy in time. Our free instruction co nished with genuine Ludwis Drum Outfit. Develop your nat of rhythm. Go to your nearest write for full details. you by mail,or at school, time as de- mand. ig future. Interesting work. Oldest and foremost school. DETROIT sone. OF LETTERING Ave. Est. 1899 DETROIT, MICH High-Grade Instruction By Correspondence Prepares You for the Bar—Est. 1892 University Methods. Standard Text- Books Approved by Bench and Bar. Graduates prac- ticing in every state. Send today for Free Catalog and Rules for Admission tec the Bar. CHICAGO SCHOOL OF LAW, 802 Reaper Block, Chicago, Hil. : \ DE DAITRIN ALT You can learn by our modern and origina! of instruction every part of the Watch Repairing Trade at home as good or better than a You can earn money while learning and 5 well paying position or start in business aft pleting our course of instruction Go repairers are always in demand and ear $50 to $75 per week. For particulars apr Wisconsin Schoo! of Watch Repa'''"s 166 Mason St. .MILWAUKEE, WIS.

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POPULAR MECHANICS ADVERTISING SECTIUN 25 A Challenge Made Me —_—=, 6A! BOX of cigars says you don’t dare lance with her—Wallifiower!"’ That was the challenge they flun at me! M porting blood boiled! ‘All right, accept 1 responded. And I ienvtell across the floor. R was much of a dancer. But when gave this affair | couldn’t stay Even now, I should have been sitting he ‘“‘sidelines”—if the fellows hadn't reastic remark. . them you can do it! Show them you is well as they!” my pride whispered. 1 i? across the hall my courage died. rly paralyzed with fright. There she iway But halfway across the hall my courage died I 1 ng expectantly—Marion Blake, an paralyzed with fright. There she wa ' expectantly—M lancer—graceful, poised, at ease Blake, an exquisite dancer—graceful, poised, at ¢ Su he should refuse? Suppose she should the center of the floor? Oh, wouldn't chuckle then! The Unexpected Happens I'm sorry’’—I stammered. ‘I guess— of course, I'll be glad to dance!” she inter- And before I realized it we were swallowed dancing throng. terrible ordeal it was for me! And twice or her. I stumbled through the steps. I her toes 1 tried desperately to keep in the music. Yes, my dancing was inex- hopelessly out-of-date! nly she suggested that we sit out the rest of mber. J] b lushed furiously ‘‘ Now, it’s com- | thought. “Now, she is going to tell me what ks of my nerve : | was in for the surprise of my life. “Jim,” gan softly. “T'll be frank. You're not th neer in the world. But vou’re certainly not st. What you need is ‘brushing up’ on the teps. Why don’t you get in touch with Murray?” hur Murray! Arthur Murray!” I repeated. ches dancing by mail. You can’t learn that ‘and Marion arched her evebrows. “The that’s exactly the way I learned—even no one does suspect it!” rally I was astounded, but thé next evening tone of Arthur Murray’s ads and clipped the Then I mailed it, asking for his free booklet free lessons. If Marion could become a ful dancer that way it was certainly worth tion—especially since I didn’t risk a penny. ould refuse? Suppose she I Find the Secret! The booklet and free lessons came promptly. What a re I tion! They showed me how many mistakes I } been making —how utterly ignorant I was of the modern stvl« ng, vet in a few evenings I had learned the modern Waltz—the modern Fox Trot and many delightful variations of the test step —without music, partner or teacher! I Turn the Tables A week later I att ende« 1 dance I r ‘ was there “ Here he is again!"’ they chorused Give him the cigars! He earned them! Imagine how surprised they were wl I asked Marion to dance! They stood open-mouthe« | glide around the floor like an expert! Now girls are always delighted to dance with me I laugh when I think how scared I was that terrible evening—for evervwhere I g¢ accomplished dancer! Will YOU Accept These 5 — Lessons? No matter how poorly you dance 1 matt i've never even been on a dance floor in v« method makes you a dancer I ive to pay a penny I prove it he lessons from his remarkable course coupon (with 10¢ to these valuable lessons will be forwa copy ot his new book, The Short Cut t coupon NOW! Arthur Murray finished cover cost of prir Studio 749, 7 East 43rd PSS ececesccecesssseesssss ss eesesesesssessseesseesessssessesece . ® Arthur Murray, Studio 749 ® 7 East 43rd Street, New York City ® To prove that I can learn to dance at! ome in te lay © send the FIVE FREE LESSONS.__sI enclose 10c (stamps or coir ® to pay for the postage, printing, et You are to it le free . : 7 The Short Cut to Popularity . . = + s Name . . 7 s Address . . . s City State . . See how easy ic is to learn the Arthur Murray way!

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POPULAR MECHANICS ADVERTISING SECTION Wrestling

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InSpare Time At Home If you can’t come to learn Draft me. Y time is enougt Same practical course. Quick,

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By Noteor Ear. With or without music, Short Course. Adul beginners taught by mail No teacher required if struction Course for Advanced Pianists. learn 259% st of Bass, 684 Syncopated Effects, Blue Harmony, Or Chime, Movie and Café Jazz, Trick Endings, < Breaks, Space Fillers, Sax Slurs, Triple Bass, Wicked mony, Blue Obligato, and 247 other Subjects, including Playing 133 pages of REAL, Jazz, 25,000 words Al brings our FREE Special Offer. WatermanPiano School, 1826 W. AdamsSt. Los Angeles, Cal. ystal

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POPULAR MECHANICS ADVERTISING SECTION -You Pledge Yourself to Secrecy IwillTeach You | the Secrets of ** Real Professional » De. Harlan Tar- bell, internation- ally known mage cian end teac of eome of tha Special § “** . Limited § with your Magre Art secrets of the Mystic Art are being revealed. Now at last you can learn Clubs, Lodges, to be a Real Professional Magician. Yes, and you can learn this wonder- Charity and So- ful art easily and quickly AT HOME. You are taught the mysterious Prin- wr Lv ciples by which the Professional Magician works. You are taught every- to the man who thing from wonderful improptu effects to ——as i Offer! For the first time in the history of Magic the old-age, sacredly guarded a! knows to massive stage illusions. Earn $250 to as $250 for a But before you can study, you must sign $1000 a Month — mo the Magician’s Solemn Pledge of Secrecy. ff {pere’s_s big demand for ——se atuuing ata This means that you are getting the cians get big money. Dr.Tarbell . . ts hi 250 f half where to make guarded secrets of the Magic Profesion. ST gg FCP aie = i portunities for you! cide, Saleenen Think of that! find 3 dous anget, The . PT iii iit coupon brings Tarbell System, Inc., Studio 13-59 oa fan? ii a 1920 Sunnyside Avenue, Chicago, [Illinois tion. Mail it Gentlemen: Without any obligation send me your free TODAY literature and information all about your wonderful coin nd ad ing al ae e “Tarbell Course in Magic.“ Also tell me about your * ice O an— - great Special Price er and Easy Payment P / offered NOW for limited time only. ° a Name a Address . = Age SSS SSSR ESE BeBe se ees se « s

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POPULAR MECHANICS ADVERTISING SECTION High School Course in Two Years! You Want to Earn Big Money! And you will not be satisfied unless you earn steady pro- motion, But are you prepared for the job ahead of you? Do you measure up to the standard that insures success? Fora more responsible position a fairly good education is necessary. To write a sensible business letter, to prepare estimates, to figure cost and to compute interest, you must have acertain amount of preparation. All this you must be able to do before you will earn promotion, Many business houses hire no men whose general know- ledge is not e qual 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 _ Devt H-974, | Drexel l Ave. and 58th St., Chicago REAL worn yk TOOLS on COLEMAN SYSTEM never fails when student means business All Electrical Subjects Taught Armature Winding; Electric Welding; Hous« Wiring; Electric Refrigeration: Farm Light ing: A. C. and D. C. Motors and Generators Power and Light Switchboards, Dynamos and Transformers; Radio; Storage Batteries Automotive Electricity All Electrical Trades need Skilled Men Electrical Skill is in Demand at $200.00 to $600.00 a Mont! FREE — Automobile Training — FREE Real Cars to Work On—and No Extra Charge LET COLEMAN TELL YOU HOW— WRITE FOR FREE BOOK COLEMAN ELECTRICAL SCHOOL 1626 J Main Street KANSAS CITY, MO. TRIAL LESSONS FRE Learn in minutes by our ‘method | what took hours. To prove you can | do it, we will send you free the first | two lessons. No previous training necessary to become an accomplished musician Lessons are so easy a school child can mast« them. PLAY FROM NOTES . SIX LESSONS Write for details and fre BOSTON ACADEMY OF ML Sic Suite 13, Regent Circle, Boston (46) Mass American School Dept. H-974,. Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. ...Architect ...Building Contractor ...Automvbile Engineer ...Automobile Repairman ...-Civil Engineer ... Structural Engineer ... Business Manager ...Cert. Public Accountant ..-Accountant and Auditor ... Bookkeeper .. Draftsman and Designer Electrical Engineer Electric Light & Power ... General Education .. Vocational Guidance Name Address ..Business Law Lawyer ...Machine Shop Practice ....Mechanical Engineer .. Shop Superintendent ...-Employment Manager .. Steam Engineer Foremanship ... Sanitary Engineer ...Surveyor (& Mapping) ; Z elephone Engineer Telegraph Engineer .. High School Graduate ..Wireless Radio . Undecided VI No talent = experience necessary. Fascinating work. Pays big mone Compiete instruction ines ok tells ou Aliph ~ Tey Colors, How to Miz Paints, Show Cards, Window Board and Wall Signs, Ready made lette ors, Gilding. Tricks of the Trade, also gives 100 Alphabe ts and De- siens. Book bound in flexible imt. leather- gold edges,and four ball i beartag Show Card & Pens. Sent postpaid $3.00..C.0.D.)10c ex. > Ogilvie Pub. Co.. 57 Rose St Dept 20: AY. City // EARN MONEY IMMEDIATELY ~~ WE FURNISH EQUIPMENT TO START!’ « FREE FRANKLIN PUBLISHING COMPANY 186 N. LaSalle St., Dept. 9409 CHICAGO MINSTRELS &"°"" can stage your own show with our books liv stage songs, crossfire monologues, aftery a ¢ an make-up CATALOGUE FREI T.S. DENISON & CO., 623 So. Wabash, Dept. 1 19, Chicago Many of the highest paid men in the world are advertising men. You easily and quickly at home during your spare time. We guarantee sati igger opportunities now in advertiaing than ever before. Constant demand our graduates at splendid pay Send for FREE Seok, sivts J Le eresting information and vita! facts you want J know a ing. Write today AGE- DAVIS ‘SCHOOL OF ADVERTISING Dept. ‘200 3601 Michigan Ave., Chicago

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POPULAR MECHANICS ADVERTISING SECTION 29 ey Thought I Was bluffing

When T Told Them ILearned Music Without a Teacher d have heard a pin drop in the room! I this startling method, which has already showr nished pl: Lying Rubinstein’s “Melody in million people how to play their favorite instr that old-fashioned idea that you need . il ‘‘talent ri nds were actually dumfounded. At send the lst of instruments in the panel, decide whicl the center of attraction instead of a mere want to play and the U.S. School will do the re It was just like a dream come true! mind no matter which instrument you choos case will be the same—averaging just a few cents + yu didn’t know a single thing about music g ago, Bob’’—‘‘How in the world did you Send for Our free isintias ’ A note of half envy, half admiration their voices. “Yes,” said Jim, “what sort and Demonstration Lesson have you played on us—I thought you If you are in earnest about wanting to isically inclined.’” “Oh, he’s been taking — strument—if you really do want to gain the r years and has kept it a secret’ —followed — that will add to your happiness, increas | Sue in rapid-fire succession. “You can’t cick gnes her tes eewteetien ond ugh, you never learned to play that well valuable demonstration lesson Get- ” teacher. ting them will cost you nothing and ™ , place you under no obligation. were all wrong, though. At first I didn’t be- vas possible to learn music by mail. I Now—before it's too late— | needed special “talent.” But, thanks toa #2 8nd send the convenient . coupon ~~ “nts supplied new simplified method, I soon discovered when needed. Cash or credit take. It was simple as A-B-C, and actual U. 8. School of Music, 712 Van Brunswick Bldg., Ne York FUN learning. Each Gy" g w Yor

new lesson was_ better Ss, tcL V and easier than the last. Ev- a eS aD as 2a Pick Your Instrument! erything about them was so gn = Piano Harmoay simple that a child of eight U. S. SCHOOL OF MUSIC, Organ and Com- could understand it. Now | 712 Brunswick Bldg., New York City lin |, Chicago Dri um —_- can play any piece of musi Please send me your free book Music Less and Traps 5 Singing CaS st ae ; — play Home,”’ with introduction by Dr. Frank Crane Banjo Ukulele fe ~ « : I’ me “lL 1 eworn Lesson and particulars of your offer I Tenor Guitar use when 1 m called upon to following’ course Plectrum Hawaiian entertain. Now my life is just + 5-String Steel a joyous round of gay parties ; hand tin Guitar and admiring friends. . Have Y (Please te plain cri OR Lies Instrument ease write plainly t demand for and eec SCoteuse You, too, can now teach id “ x > cc ; no ee yourself to be an accomplished Address musician—right at home—in half the usual time through City r

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POPULAR MECHANICS COLOR ym Od etem erie Commercial Drawing Become An Artist This Tested Way ,ousands who never dreamed they coul w can nov time ngl le Way st ade nt 1 i » while still just a student V. Fritsch wrote I earn $10 to $15 a day Big Money 1 in Commercial Art Millions of do r iis year on advertising and ory illustratior ymimer l rn t 1 cartoons And ever more will be s it next year ommerci irt is a tremendous field —and a field v e very big money gladly paid anyone wl can produce go irt wor vertiser magazines, me wspaper printing house busir onecer eed trained arti om- petent artists eas t rom $5 o over $250 a week Why font you too enter this fascinati big pay business? Learn to Diaw by This Simple Method You will bé delighted with the fascinating method—and you will be amazed at your rapid progress. You start at the very simplest fundamentals, yet almost before you realize it, you are taught how to produce salable work It's actual fun learnin to draw this way You learn at home yet your wo » ves the personal attention and criticism of « ipetent A ructors Many students actually sell enough work during their training to pay for it many times ver! Mail Coupon for FREE BOOK A new handsomely illustrated book has just been . int d, whict gives all the most up-to-date information on the housands of wonderful opportunitic n Commerci ind show how this startling, simple metho na » enter is field it te mut <« tudents i ice at t say actual re work 10 yn : ney while study- ing I 3 tr ive book will 3 ut cost or obligation Send for it. Mail coupon NOW No salesman will call). WASHINGTON SCHOOL OF ART, In« Room 3012-E, 1115-15th Street, N. W., Washington, D. ¢ Seeaeetaeee PTrTTTIIITiiti tit Washington School of Art, Inc. Room 3012-E 1115-15th St. . .. Washington, Please t ( gat our boo Way Namé (Write name plainly and stat Addre ADVERTISING SECTION

Don’t Envy The Plumber BE ONE! =——— 66820-6094 00 PER DAY and work GUERY em. day, is the Pluinber’s wage. Every pitted | werknen will tell yon that Plumbers have the best of it. WINTER and SUMMER the Plumber is t top wages. No skilled Plumber is ever out of a job —<« his opportunities with any trade, plus the opportunit having your own shop. ch you P tumbin hf with TOOLS (not books aster PLI —— aoe » finest eq schools in America We make you a PI tumber, every fs taught cones «A poke Work—Blue Print for plan ing—all other tricks LEARN IN 8 to 12 WEEKS sithon' ore experience If you are making less than $60.00 a week you owe itt self to investigate. Get FREE catalog that tells in pictures and words how we teach this trade. Special rates now UNIVERSAL PLUMBING SCHOOL 2030 Troost Ave. KANSAS CITY, MO, . y at are

—IN 90 DAYS! Play anything —jazs to classical! Even if w nothing about piano n po/™ Til nave your ingore dancing r the eyboard with confidence in % ys an hum or whistle et ine you Can My students are Daking money, MAKE ME Prove fy Without puzzling note practicing te dious acale vb found the way to masicet ir stinc “t =o oe. You wat THe PROOF! IU send it. A me now D. UTTLE, Director ILLINOIS *Scnook. OF music 215 Hunter Bidg., Chicago, i

il ; ra Go to High School at Home You can secure a high school education right at by studying the spiendid new courses recent pared by tl iternation< orrespondence Sx ; 1 the cours in _ arré colle ness | tion, missed when f diploma is aw Mail Sentai for Free Booklet INTERNATIONAL CORRESPONDENCE SCHOOLS Box 569 3-E, Scranton, Penna. Withou t or ol i i me f ticular about th course befo whi I have an X:

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POPULAR MECHANICS ADVERTISING SECTION Lavseereer! be’s Drafts- ip Army. to is © Join D mans! Marc \ \we \\\ RS a Month $ I average that! Bihan “hora Yes, Drafting pays these six Dobe-trained Drafts- They learned Drafting at men $43,400 a year! home in their spare time after reading my Free Book —Successful Draftsmanship. YOU should write for it now! You must take that step first. Do it today. Pe —I make q from drafting. Mail the FREE Coupon at the bottom. Learn a Fundamen- tal, Basic Profession — Drafting! ouloo, Canlcabh Draft ino At Home ore Dobe’s “Easy Drafting Training at Home” it was almost necessary to go away to college to learn drafting. But now you can stay home, hold down the job you’ve got, keep on earning money and easily nd quickly equip yourself to enter thedrafting profes- sion. All the men yousee pictured here did just that. Get.into drafting. It isa big,appealing field! Draft- ing is growing bigger and more important every WRITE? “soox- % BOOK— Successful Draftsmanship! Read this book! After you have read it, make up your mind w her you want to be a draftsman! But write for it today. Certainly "will tally he book can’t hurt you. Mr. ss will tell you about other men besides those fie tured = Let ae been successful — man: No matter what you ase , iy now ask for the book today DOBE EASY SY DRAFTING 1951 Lawrence Ave., Div, 13-59 Chicago gael “TOT sayy 7 Mf) Turn Spare-Time into Profit—learn $1000 . Month is what I make. FA ewww “a4 Keo These 6 Successful Draftsmen wrote for my Free Book. Will you? year. Before any house or machine or factory can be built there must be a PLAN. That plan must be DRAWN. A draftsman must DRAW it. Learn hownow. Be ready when the time comes. It is smart to choose a profession that has always been and always will be. A profession which is standard and essential. A profession which the world must have. MailCoupon. Do that Now. DOBE EASY DRAFTING 1951 Lawrence Ave., Div. 13-59 Chicago Please send me free your book, “Successful Draftsmanship” names of other big money earning draftamen you have trained » and Name Age...... ROGIEED cacccnccececemsmasescscesesessaceesccessasssss= nausvenesoesensens -_ Post Office. a

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POPULAR MECHANICS ADVERTISING SECTION Learn Piano JiA-2ZE Quickly by Ear Beginners and advanced students learn quickly at home—in spare time. Wonderful Niagara Method clearly shows you how. Complete course 20 lessons. 10 years successful teaching. By R. C. JAMES How I used to wish that I could sit down at the piano and pour out the golden syncopation of American elody, like the jazz piano players I had heard. How I sed to wish that I could be the popular one in every crowd. But I could not play a note. Niagara Method Showed Me The Way Then somewhere—just as you are reading this—I read of the Niagara Method which makes piano playing w onderfully simple. I sent ine Director Wright’s book ‘The Niagara Secret. I read the book, and I knew it was right, I followed Director Wright’s principles, and in no time | had caught on to his ideas. So Simple—So Easy—So Delightful And the best part of itallis that there is nothing hard about the Niagara Method. In a short time, by follow- ing Director Wright's principles and by devoting a part of my spare time to the practical application of his course, I soon learned to play. No tiresome scales—no arpeggios to learn—no weary hours of practice—no do-re-mi—no meaningless ex ercises. If you know the Niagara Method, you can sit down and reel off any popular song which the high priced o -chestra leaders play in cabarets, clubs, hotels, dance halls, or theaters. Clip Coupon Now—Play In Few Months If you have never played a note, or if you do play— no matter how well—you too may become a master of jazz and melody by learning the simple, wonderful Niagara Method. FREE BOOK Don’t wait another day. Send the coupon now for the “*Niagara Se- cret.’’ This book is yours absolutely FREE, If 10c (coin or stamps) is enclosed you also receive wonderful booklet**HowtoEntertain atPiano”’ Ronald G. Wright, Director Niagara School of Music 226 Cleveland Ave., Niagara Falls, N.Y CLIP THIS COUPON NOW! NIAGARA SCHOOL OF MUSIC, 228 Cleveland Avenue Niagara Falls, N. Y. Without obligation mail me your book‘*“The Niagara Se- cret.’’ Lenclose 10c for book** How to Entertain at Piano”’ » ame >treet ELECTRICITY 5 Practical -Technical TRAINING Great demand for practical-technical electri: engineers A brilliant future awaits you salaried position or a profitable business of your these may be yours through our PRACTICA TECHNICAL courses. Opportunities unlimit Finlay condensed method now in 25th success trains head and hand. Thousands of hich graiuates throughout the world testify to the of Finlay training. Extensively equipped lab and shops. Faculty of recogni perts. One and Two Year e« SEND Electrical Engineering open in S« FOR 12 Weeks courses in Practical Elk and Power Plant Operation oper FREE time. Degrees, diplomas and cert CATALOG of efficiency awarded. Students to positions. FINLA Y Borers conerrcwe 126 Finlay Bidg.- Kansas City, Mo, PREPARE FOR AN ART Seer thru the only art schoo. operated as a department of a large art or- ganization, who have actually pro- duced over a quarter million draw- ings for leading advertisers. Where else can you get so wide an experi- ence? Home study instruction Write for illustrated book telling of our successful students. MEYER BOTH COMPANY Michigan Ave. at 20th St. Dept.16, Chicago, III. LEARN WATCH REPAIRING Be a watchmaker—you can learn this profitable trade by correspondence in a few weeks in your own home by the DeSelms Chart System. After you complete the course you will know a watch fromAtoZ. You will know just what the matter is and how to repair one When you craduate you will be & practical watchmaker and repairer and compe- tent to fill any position Positions for our graduates. Ask for our Free Book. {i explains our system and terms. THE DeSELMS WATCH SCHOOL LOGANSPORT, INDIANA Ta Be successful. ME \ gener’ A rfect speech. Win a heap. . Senc -! full information and special phonograph record. Dime covers postage. 153 Stimson, The Lewis institute, Detroit $ so much musclk Strength °°)" sted Physical r lal’ explains fine .« Jitsu, Boxing and Wrestling _—_— yu invincible »ursein physical culture astounding police secrets and simple hea C. O. D. for $1.97 plus postage Siebel Press, 34-0 W. 20 St., New York ny SEND FO8 FREE B0d! In3 months com, $5008 yous } EMPLOYMENT SERVICE u to earn while learning thie new ney y maki 2 Profession. Age no barrier and sus training required —_— sone by k in rubber and go Easy individual aeereetess. Bay or night ms. Railroad FARE o extra Write Secretary for FREE ‘BOOK P. NEW YORK SCHOOL OF MECHANICAL DI NTs 147 W. 33rd Street

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POPULAR MECHANICS ADVERTISING SECTION 33 )@ This Singular Book Wields a Strange Power Over Its Readers Giving them a MAGNETIC PERSONALITY almost instantly! orm starts pmber 15th ity, Mo, 2 Will You Read It 5 Days FREE—to Prove It Can Multiply Your Present Income? STRANGE book! A book that Best of all it tells vou how to Is it any wonder that thousands of men on Cant sel] a ees ein lish th . it Sas ateeal and women say that they are overjoyed = § LO Cast & Spe — every wets — oe SUNS inStanid- with the results they have received? One 10 turns its pages! neously! enthusiast said of this volume, ‘Things I \ of this book was left lying z have read there I would never have ‘in B . Merely mail coupon below and this 1 6 j Gladstone, Queen Victoria, Edwin Booth markal volun | n han \\ - . le rote iy, z _ . ’ ’ remarkable volume, with cover i and- ’ vesathe people so profoundly Henry Ward Beecher, and Cardinal « dark burgundy cloth. gold embosse 1 , 5 ome dark burgu y th, gold embossed, altect ry this book ?- so anxious to Gibbons ; ; will be sent vou for free examination If get py? [Theanswer :; Until recently, ohaites- you aren't stirred and inspired in the 5- chow ury s teachings nave day free period. return it nd it « ts ) ; The bool : lay [fr period, return ita i you , h : bes nl we eon nothing. Otherwise keep it as ir own y o them for the people who could pay $25 and remit the Special Price of only $3 in first t how anv one Book Tells You or $50 each for instruc- ymen Tl rolu . ) OW any on - : vn t. is volume Vv origi- ee M How to develop a Magnetic tion books. Now, his nal publi hed to sell at $5—but in order velop a ag- Personality ‘ wonderful teachings have manv readers—it is being offered Personalitv in How | a i rataceaeean been collected into a single d price You clak ant his “oe _ Secrets ; “ mt F 4 “eo ~ 5. Mie xplains how How to gain perfect nerve volume, at a price wsintn il this coupon NOW. RB ton rnicht tl control the reach of all! And fur- Press, Dept. 13-W, Meriden, _ overnigni 1 How to read people's feel thermore,Shaftesburyhas (Conn. lcharmthatat ings 4 watching their consented to reveal hun- re 7 : he - mouths dreds of new discoveries Ch 1 coun less friends How to read peopk Seectiiaes Be satoad —_ ee meee eS ul self-confi lencs thoughts by watching . . ows put ms : . - I indenc emake mania print. RALSTON UNIVERSITY PRESS 1) sures quick suc- How te develop a magnetic Dept. 13-W, Meriden, Conn. A ¢ 1 any business j Strange Effect on ith os, Se ‘ a How to make your face ap = ow York, WY It tells how to draw pear 20 years younger Readers All right I'll be the judge. You may Nenr ¢ . ° = How to control others by a send me the volume ‘“‘Instantaneous Personal SEND FOR i to you at once, glance Readers of this book Magnetism” for 5 days’ FREE EXAMINA REE BOC! rT stibly—how to be How to use Magnetic quickly become masters TION in my home Within the 5 days I will a he . Healing of a singular power to either remit the special low price of only $3, Yo ™ lar in any society How to end awkwardness fluence men and ~ in full payment, or return it without cost or UR 1 ‘Ten ‘ and timidity influence men and women objigation , how to overcome al How to attract the opposite around them. Not by Ny most at once any ti- ocx : force — not by loud argu- ii : avi 4 How to get ahead in your ment. But rather by some a Jf y youmay have business or profession subtle, insinuating power , how to be a magnet How to make your sub } Senet . ; I C é agnet conscious mind work that sways mens emo- of human attraction, wonders . an tions. They ha able to Address " l_like » reve And dozens of other vital play on people s feelings as d wherever topecs just as a skilled violinist plays upon a violin.

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POPULAR MECHANICS ADVERTISING SECTION

, ma Be a Trained Radio Expert If you’re earning a penny less than $50 a week, get my free bo information about the Radio business. Trained Radio Experts are 1 in more than twenty different lines of this new and growing profi (three hundred thousand new openings created by the swift growth of R in past few years). Why go along at $25 or $35 or $45 a week all you Study Radio and after only a short time land yourself a REAL job \ REAL future! Be a man who has money in his pocket and in the | don’t scrimp and scrape for the rest of your days. é 4 . « : _ ’ a? & ~ - 3 eacecee The good positions in Radio pay all the way from $50 on up to & $200, and even $250 a week. Suppose you don’t climb to the ve but that you do advance to a position that pays you $125 a wee! in and vear out. Any chance to make that much where you ar Then send for my free book, and learn about a field where there’s cv. , Yrealopportunity vu ~ Where good men, if ullv Sa fies they have the right I'll give you all the training you need to get into any training, can ine of the Radio business. And I back up this training their wav into by a signed agreement to refund every 3 penny you pay me if I don’t give you exactly the training you need. After you finish my training, you'll be the judge, eo If you think I’ve earned my tuition fee .* I keep it. If not, ask for it and you'll get . it right back. Six Big Practical Outfits Given You To Help You Learn I teach you both the pa. and the “how’’ of Radio. You Reate—-mner tale | | ‘a Ae Ae he i learn to DO a thing, and you learn WHY it'sdone. I send you, t and designe a r i one. T. } | WITHOUT EXTRA COST with your course, six big practical roadcast stat &§& .' 2 big salaried jo}

504.000 192 ecord of the Rad of big Radio jobs man wht r é outfits of material to experiment and work with. These outfits (<9 | cy\ are the real thing—not toys. The parts they contain will build } j yest approximately one hundred different Radio circuits With all this material you do practical work from start to finish of your training. You get your hand in, and you get confidence in your-

Ot As = . = self. Then when you run into a Radio problem later on, on the ~ job, you KNOW you can do it because you've already done it Broadeasting and commercial with these six outfits of practical material. With me you don't land station work appeal to a lot of n learn to be a “paper Radio Expert’’—you learn to be the kind of t eld anc sinating A oul ‘ “tf ny a ~~ —_ . ~~ expert that shows his worth on the payroll. Full details in my es y oughly to €et into this field and make big book—-sent free . . Send F } Book of ini

Six million. Radio receiving sete in use in the United-States means millions of dollars are £Oing t and Repair men every work you must be t » Radio Service

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POPULAR MECHANICS ADVERTISING SECTION Learn Quickly, Easily at Home In Spare Minutes Stay home! Hold yourjob! I'll bring your Radio training to you, and you can learn in re time after work. No need to go to a strange | live for months on expense when you learn my You study in the quiet of your own home. As for ining—it’s written just as I would talk—in forward, every-day, understandable language. get it, and you'll get it quickly—in a few months’ time—because I’ve made it so clear and interest- No particular education needed—lots of my suc- ssful students didn’t finish the grades. Earn $15, $20, $30 Weekly light Away ‘‘On the Side’’ s Brown, South St., Foxboro, Mass., made $1,000 from spare- ) jobs before he even finished my course. H. W. Colbentz, 1, averaged $45 a week; Leo Auchampaugh,6432 Lakewood made $500 before graduation; Frank Toomey, Jr., \. Y., made $833 while taking the course. All this done RE TIME away from the regular job, while these fellows | studying the course—and they're only a few of hundreds is you start this training I begin teaching you practical Radio 1 a few weeks later, I show you how to make use of it in \ JOBS WAITING! In seven short years—three hundred thousand new jobs in Radio! Lots of jobs open right now, for those who have the training. The Radio industry ha4 grown by leaps and bounds—=so fast it has had to take whatever sort of men it could get. Such men, if they haven't trained themselves in the meantime ; losing out and will keep on losing out They'll be replaced by men with the KNOW-HOW But it trained men ONLY that are needed. Over 1,000 Openings For Trained Men NOW! One great Radio manufacturing concern alone has over one thousand openings to give my gradu- ates this year. These men will be needed all over the United States Any graduate of mine who stands well in his home town is eligible for this work. The head of the above mentioned concern one of the biggest Radio organizations in the coun- try—is a graduate of mine. He knows what my training did for him. When he wants new men for his organization he wants men with the same train- ing I can't possibly graduate enough men this year to fill these openings. So there will be more open- ings with this one concern than there will be grad- uates to accept them But there are other openings to choose from, too. My school has trained more Radio Ex- perts than any other school in the world. It's the oldest and largest Radio home-study school in the world. There are N. R. I. trained men in almost every Radio concern of any import- ance in this country. Many Radio employers are themselves my graduates. That's where you get your “stand-in” as an N. R. I. gradu- ate yourself Every graduate of my course is entitled to Life-Time Employment Service, without a penny's charge, from my helpful Employment Department so you can be making $15, $20, $30 a week “‘on the side,” hile you're learning. 64-page Book Sent Free For the Asking g book of Radio information won't cost you a penny, and you inder any obligation by asking for it. It's put hundreds of fel he way to big pay and brighter futures. Sending for it has been ning-point where many a man has made his start toward real Suc- et See what it’s going to mean to you. SenGg coupon TODAY! Address: J. E. SMITH, President, National Radio Institute, Dept. P-85 Washington, D. C. J. E. Smith, President, National Radio Institute, Dept. P-85, Washington, D. C. Dear Mr. Smith: Kindly seid me your big free book “Rich Rewards in Radio,”’ giving all information about the big-money opportunities in Radio and how you will train me to take ad- vantage of them. I understand this places me under no obligation, and that no salesmen will call on me. This big 64-page book, printed in two colors crammed with interesting facts and photos about money-making opportunities in Radio, sent free to everyone who clips the coupon. No obliga- tion by sending for the book— it’s absolutely free Town One of the most valuable books about Radio ever me owe ee ,« - . written. Address

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POPULAR MECHANICS ADVERTISING SECTION Von ay For Any Man who likes Mechanical Work the Shortest Way to Financial Independence is Making Crowns, Plates, Bridges, Inlays, Etc. for Dentists. Steady Earnings up to $5,000 a year—some earn far more in this Profitable Professional Trade. THREE MONTHS TRAINING LEARN BY “DOING” will qualify one to enter this most rapidly [2dividual instruction—No growing professional trade—Mechanical Den- ¢!#sses_ whatever — Practical tistry. est opportunity for men who like to Work. You use regular standard use tools—dignified work, steady income, rapid %00ls and learn to do exactly the advancement. no ‘‘slack seasons” as in other ind of work which will later be re- trades. quired of you by Dentists EARN WHILE YOU LEARN LEADING THE FIELD Lack of money need not stop you. We Bodee training is recognized by dentists every- 25Sist in securing whole or part time where, owing to our 35 years’ experience at this Positions to help our students pay expenses, work—established 1892—the oldest school. ' Bodee-trained men make good. After only JUST COMPARE! a few years you find them prominent in this Compare this trade with what you are now profitable trade—on good salaries or conduct- doing, or with the best you can find in any other ing their own laboratories. There's room for line! Compare our unexcelled training—step by many more—think it over! We conduct a step—every point thoroughly covered—no time Placement Bureau to select suitable positions, wasted! Consider also the very reasonable cost and, should you desire to open your own labora- of this exceptional training tory, we assist you in securing a location and equipping your laboratory Send for Catalog No. 2 FOUR EXCEPTIONAL OFFERS WITHOUT ADDITIONAL COST BODEE DENTAL INSTITUTE 1—R. R. Fare to Our Nearest School. 2—107% Reduction of Tuition. 3—$50 Outfit of Standard Tools. 4—Post Graduate Instruction. ,AE¥% YORK 120 At ADEE PIMA _, BROOKLYN 308 road Street lol Want Some Money? Here’s a wonderful way to get it QER beautifully illustrated book tells how. It tells all about our new methods of art decoration, art treatment and how anvbody can learn without previous training or experience. It contains page after page of handsome color illustrations of what you can make and sell. Make Good Money—Book is FREE Our system is amazingly easy to learn and All supplies are sent by us with the instructions the profits are larger than in almost any other and many have made $25 the first week. Some vusiness. You can produce beautiful finished men and women have taken up this work for art objects almost from the beginning You their own amusement. Either way. pleasure or don't have to know how to draw or Brees. = s the most deligt tf il home work you have any experience Begin mak- ean A rite N ing money now. book; it's S FRE DEPT. 66-W ADRIAN, MICH. TRAVEL- sicla ee: SAM? RAILWAY POSTAL CLERKS MEN—BOYS MAIL CARRIERS—POSTOFFICE CLERKS 18 to 45 $1700 to $3300 a Year for Life | ¥* Coupon Before You Lose it — ee ee ee ee No “lay-offs"’ because of strikes, poor business, etc.—sure pay— COUPON rapid advancement. City and country residents stand same chance. | FRANKLIN INSTITUTE, Dept. P175, Rochester, N. ¥ Common sense education: sufficient—no political influence. Rush to me, entirely free of charge, (1) A full deser STEAD the position checked below; (2) 32-page book. wit Y WORK er (3 Particulars telling how to sition check Cut coupon and mail it before turning the page. UP Railway PestalClerk ($1900 to $2700) Customs Positions (1140 to S18 | ()Pestofhee Clerk ($1700 to $2300) (jPrehibition Agent ($1800 300 City Mail Carrier ($1700 to $2100) () Rural Mail Carrier ($2100 to S30 ] Address.

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UTE jOCKLYN POPULAR MECHANICS ADVERTISING SECTION “J was a $30 a week clerk —but electricity now pays me $10, 000" per year” That’s what happened when I stepped out for a big-pay job—Greer paid my fare to v's vor a part pime | M Chicago Take Automobile Course at Same Time man did you can do. Five year d a coupon like that on this ad. He didn't, you save consideral ae m mney. He was slave to a ical tricity Of ae, WEERETS aa aadiin ation wages. as Chicago. When he got here I g Act Promptly , ie job and found him a place to liv: fan The Cre er O “ ortun . “ae * poe Fan reer Opportunit costs n WIM GREER. President, Greer Counc: Like Electricity? Dept. 1201 2026 $. Webesh Axons enicaco. eiinten se ad rr ur FREE BOOK “@ntboffer for —Make it Pay Yo: Big Income s unde Lam nobowlic atedin@ustway ‘vm! Ke to fool wit’ the “juice” that runs our industri get into tt big pay class I've trained over at r the work big [hey are searching GREER ocntcat excinernine Dept. 1201 + 2024S. Wabash Ave. - Chicago

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POPULAR MECHANICS ADVERTISING SECTION

Popular cM he can gar, — LEARN AT HOME With a nationally famous artist as your teacher you can learn to classical or popular music We to 00 guarantee our personal teachi 200. method. Both advanced and « mentary courses on allinstrumer each week Write for catalogue Conn NATIONAL SCHOOL °% MUSIC INC. 506 So.WaABASH AvE..Depr. $16 CHICAGO

Yes, licked! Twenty-five years old and STUDY AT HOM tek ° . . . Become a lawy still working in a small job at a small egos to bes high positions public his.’ te salary independent. Greater opportur s ays 5 ; then ever before. Big corpors Why? Well, chiefly because he felt he tions are headed by men with egal train- arn idn’ “52 aini f ; $5, to $10,000 Annual! apa — special +. one oe now that aut w euide you step by ter, Yourcan train ot home e realizes the need, he sti eeps putting Laflalle et A Ee L.B. ° , D it off — and off — and off. He’d rather state. We furnish all text material, including fourteen Law Library. Low cost asy te Get our valuable 108-, age shoot pool or stand around the corner than ‘Law Guide’? and Evidence’ books FREE. Send for them N. : ° ° LaSalle Extension University, Dept 1264-L Chicago spend an hour each night in money-making The Wortd’s Largest Business ey institution spare-time study. tg ; Learn Watchwork, Jewelry work And the pity of it is that he has just as A fine trade comman much natural ability as most of the- men and Engraving 7 a good salary, and your serv who have gone ahead of him. He could be always in demand. Addres: Horological, Dept. P, Bra earning three times his present salary if he Institute, PEORIA, ILLINOIS, for our latest catalog. only had special training. Are you like that? Are you going to work for a small salary all your life? Or are you going to get the special training that employers everywhere are looking for? It is for you to decide Nobody can force you to mail this coupon to the International Correspondence Schools. That’s a mat- ter entirely in your own hands. But remember this —the sooner you send it in, the sooner you are going to get a better job and a better salary. —_— rm ea a_esOSSsS INTERNATIONAL CORRESPONDENCE SCHOOLS ~ 4 . “The Universal University’’ Bex 5688-E, Scranton, Penna. = s Turn into Without eost er obligation, please send me a copy of your book- liars FAST! let, “Who Wins and Why,”’ and full —— about the course before which I have marked X in the list below: Make $1,000 a Year * BUSINESS TRAINING COURSES Business Management C) Salesmanship in Spare Time — Easy Industrial Management L) Advertising ts of room for YOU in the poultry Personnel Organization Better Letters business. 85% of the people of this seinen tet Traffic Management f Show Card Lettering country live in cities. EVERYBODY —— te ~ Business Law }Stenography and Typing eats eggs and poultry meat —but only - Banking and Finance Management IE inglish 25% produc oa oa, a — Accountancy (including C.P.A.) Lj Civil Service nak ahnated fe te an Gnenh int — Nicholson Cost Accounting [ allway Mail Clerk We" Gt cRAN TEE ee yer - t im o J Bookkeeping {)Common School Subjects how you how to feed f for eggs, in <e t Private Secretary () High School Subjects | hy beg 4 ty oe. ~~ Warther ISpanish O French CjIllustrating © Cartooning eying hens A BIRDS og 8h am . ‘You aie TECHNICAL AND INDUSTRIAL COURSES course, produced by eighteen aha ua expert eple od 1. ear Electrical Engineering Architect | Gusel ashe pols renege Begg meal Fone ee ap wand = Electric Lighting Architects’ Blueprints sands of °. pre te enced_pé Mechanical Engineer L)Contractor and Builder Methods that make PROF Y w ‘Ow, Haw Mechanieal Draftsman () Architectural Draftsman aren. Machine Shop Practice C)Concrete Builder : and what we can do for you. Mail Coupon Today Railroad Positions {)Structural Engineer \ Gas Engine Operating ()Chemistry 0 Pharmacy = Civil Engineer (J Automobile Work Surveying and Mapping {)Airplane Engines Metallurgy O Mining {)Agriculture C2) Navigation | r Steam Engineering C)Mathematics 0 Radie : . The National Poul Institute . Washington, D. C. ept. 411-D I am interested in your plan on **Hew to Raise Poultry for Profit.’" Send me yo Street Address wee FREE book, without obligation on my part CE Ss. E | +

Sertauewn.

Name City Name Oceupation Persons residing in Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada Address... .

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y trained | big euc- life. Be ortunities corpors gai train- nually

se Trainin Built Noted Engineers This is not a one- man, one-idea school. { is Engineerd tives of the g corporations ersities helped Dunlap-traine " te and up-to-date, 1, General Electric Co. Commonwealth Edison Crocker-Wheeler Co. POPULAR MECHANICS ADVERTISING SECTION 39 / ELECTRICAL Job Tickets actually lé * = ae ~ = - - = ’ to prove this home-training will prepare you for a good job and a raise in pay! Get these five job-tickets. Look them over. Test your own ability to master Electricity at home in spare time. See for yourself how every fact has been simplified. See what thou- sands of men have paid millions of dollars for, to help them earn BIGGER PAY. Uncover some of the mysteries of Electricity, and see why millions of men are so fascinated by it. Don't send a penny, don’t enroll —just mail the coupon. Go Into ELEGTRIGITY! Thousands of jobs open at $60 to $125 a week. My training prepares you to fill them. Superintendents of AMERICAN SCHOOL boittsne*™ chistes Cutior-Homm Power Plants Wanted. Chief Electricians Wanted. Electrical Experts Wanted in Radio, Electrical factories, Auto Plants, Tele- ‘ ‘<. Western Electrie Co. phone and Telegraph Systems, etc. Underwriters Lab., Inc. Columbia University 10. Dartmouth College . . a 1). Massachusetts inst. g Somarers - C) “BIWill make this Contract 13. University of Vermont ee = l ! n ra AND MANY OTHERS on, enattain with You! Read it. This million dollar institution stands back of this agreement to PRE- PARE you to fill a well-paid Electrical Job, and then to help you FIND the job— or torefund the small amount charged for your training! 7 Costly Electrical Outfits Given! I send you absolutely without extra cost, asa part of this training, 7 costly outfits of standard size tools and materials, so you learn Elec- tricity BY DOING actual Elec- e trical jobs. One of these out- $10 Motor Given Job Service 9 fits is a $10 Electric Motor—a real motor and generator, the ce same type as the big fellows in * power plant. I send ‘ . it to you “knockdown’’ and have you wind the for STUDENTS and GRADUATES. This JOB SERVICE field and armature and™&ssemble it. That's the way keeps in touch with great Electrical employers all over I teach every branch of Electricity! House-wiring, ner The day you enroll, this Job-Service Department regis- Electric Light, Radio, and Motor outfits includ 1, finds out what kind of job you want, where you want to And when you apply for the job you want, we back you Tickets 5 Job actually FREE! ir recommendation and help you make good in it after you_get it. Chief Engineer Duniap, Electrical Division ITE Me Immediately! AMERICAN SCHOOL If vou have reached the point where you realize YOU Drexel Ave, & S8th St., Dept. E-974 CHICAGO MUST train and specialize to get anywhere, write me immediately! I Send me your combination TRAINING- vou the wonderful opportunities, the enormous salaries, the many open: AND-JOB offer, 5 Free Job-Tickets, facts ting in this billion dollar industry. I'll tell you about our sensational about opportunities in Electricity, etc, nm TRAINING-AND-JOB offer which practically assures your success ipon and get 5 Free Electrical Job-Tickets and complete information Name CHIEF ENGINEER DUNLAP, Electrical Division Address SE4Preen

Occupation

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POPULAR MECHANICS ADVERTISING SECTION

YOU totisn tine cise motion like this “Due to the training I received from course, I have been promoted from thx to the drafting room. I have completed 11 lessons but have been able to satisfact draw up all the jobs I have been gi) Name on request. ) When You Enroll ¥ | || Ornamental Iron Draftsmen Get Big Pay! Beginners as high as This Hawaiian Guitar expert ; $60.00 a week experienced men and professor wants the oppor- : pp to $500 a month in executive tunity to welcome you as a stu- positions. Learn while on your dent so you will quickly learn . A present job. We'll help you get how to play a Hawaiian Guitar— & position as soon as vou qualif\ ves, you will be able to play just , Write for free book telling all like the native Hawaiians. To get about the opportunities in th you started and help your musical ‘ aa line success, = ich will bring you pop- American Institute of ularity, you will receive a beau- Ornamental Iron and Bronze tiful Hawaiian Guitar, the 3048 Hennepin Ave., Minneapolis, Minnesola same as the one pictured, ra when you enroll. Our short cut method of in- struction willenableyou to play a piece almost from the first lesson tush eo~on for full par‘.culars today a’. we will reserve , : . Hawaiian Guitar 4 ; Write today for FREE 128-page book, “THE LAW- TRAINED (MAN for you. = which shows how to leare law in spare time through the Blackstone he course prepared by 80 prominent legal authorities, including = ach lawyers, and U. 8. Supreme Cour bination text and cas of instruction used All ma € ary furnished witt

the course ed mediately pe ¢ graduates LL. ¥ Moderat < n t erms Money-Back Write for tree book today BLACKSTONE INSTITUTE, {5"°'

ly Quickly With our short cut method of instruction you will quickly learn how to play Hawaiian Gui- tar, which will bring you popularity and social success You will leern to play from notes vr don u never had any musical training, you will ee! et on, because our nine experts have a course of home instruction which is as iy as learning A, B, Picture and Photograph Record Method Easy OTELS, restaarants, clubs, apartments, hospitals, inst schools and colleges everywhere need trained men an Over 70.000 high-class positions paying $2,500 to $10,000 a y« annually in the hotels of the United States. Nearly one a! quarter billions of dollars’ worth of NEW HOTELS, CLUI STITUTIONS being bullt this year will need over 200,000 men and women. Hotels start you at salaries up to $3,5( with living usually included. At any time there are over | your own home and enables you to listen positions open in front aoa ee Feving sas + is = phe wit — . Previous Experience U nnecessary you your first lesson free Rush coupon now ; You can have one of these fascinating, big-pay positions . Schools guarantee to give you the valuable knowledge taken some of the most successful hotel men years to obtain Age young and old alike b equal chance for success : ae experience « 2 Se ee ee ee ee ee ee ee ee ee ee ee eee eee eee eee ee necessary A cor te) i educatio a you nee : We train you in your ime with the Lewis Simp! y -d Study i} HAWAIIAN STUDIO No. 5212 ich with big opp n All of your training under the persanal » of New York Academy of Music Clifford Lewis, Ma Consultant for over hotela thruout the 100 Fifth Avenue, New York, N. Y. Our atudente employed by leading hotels everywhere end coupon today for Free Book, “ Your Big Opportunity,” showing how we you for one of these splendid positions and expleining our Money-Back Ag reo ee — — FREE BOOK COUPONS — — — — | LEWIS HOTEL TRAINING SCHOOLS, Room AO-385, Washington, D. C. We don't depend upon printed lessons only for your success, but we also furnish pictures of our professors playing, diagrams, charts and phonograph records for each lesson This practi- eally brings our professors from our studio to Please rush your Free book, ‘How to Learn Hawaiian Gu tar,”’ and my first free lesson Also reserve a Hawaiian Guitar forme. This obligates me in no way whatever Name.. Address | City State ae ee ae ae ee | | | | Name E | | Send me without obligation the Free Book ‘‘Yeur Big Opport | | | )

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POPULAR MECHANICS ADVERTISING SECTION Now he DRAW$ the things he wants OOK at drawing No. 1 above. Then compare it with No. 2 and note the improvement Federal School training has made in the work of Art Nelson. Before he studied drawing with the Federal Schools, he worked as a surveyor’s assistant $18.00 a week. Today he has a fine position in the work he enjoys at $75.00 a week. He says, ‘““The Federal Schools made this possible through their training and co- peration, as I had only average ability before enroll- ng as a student.”” Mr. Nelson is just one of hundreds f young people making good money because of Federal training. Opportunities for artists have never been better. Magazines and newspapers buy millions of dollars’ th of illustrations every year. If you like to iraw, let your talent make your living. mee Federal School of Illustrating has taught ndreds of successful students. That is because methods of instruction are right. Over fifty us artists such as Sid Smith, Neysa McMein, Briggs, Charles Livingston Bull, Norman kwell and many others contribute exclusive les- s and drawings to the Federal Course. They tell 1 their methods in a clear understandable way. > subjects include illustrating, cartooning, letter- oster designing, window card illustrating, etc. ey are easy to learn the ‘‘Federal Way’’—at home r spare time. Have Your Drawing Talent Tested If you like to draw, you may have the free criticism and analysis of your work by sending for our free Vocational Test Chart. We will send with it our free book, ‘‘A Road to Bigger Things,’’ which explains illustrating as a profes- sion. Nelson got his start sending for it. This is your opportunity— grasp it. Fill out the coupon now. of Illustrating Federal School of Illustrating, 12137 Federal School Bldg., Minneapolis, Minn Please send your free book, “‘A Road to Bigger Things."’ Name... Occupation.... Address...

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POPULAR MECHANICS ADVERTISING SECTION From $1,800 to $10,000 in Fgur Years Thanks to Higher Accountancy “LaSalle training in Higher Accountancy has en- abled me in four years to increase my business more than 500 per cent.”” So writes John H. Lansing, Public Accountant, Income Tax Specialist, and prominent citizen of Amsterdam, New York, who deliberately resigned as purchasing agent fora large carpet manufacturing company to start on his own as a Public Accountant, Mr. Lansing was 43 when he enrolled with La- Salle, and at the time was earning from his newly adopted profession less than $2,000 a year. Today, the firm of which he is head is auditing the books of 100 business houses, including 20 corpora- tions; and his Income Tax Department has more than 500 clients. Each year his business shows a healthy increase. “‘When you consider that the average bookkeeper does not receive over $40 a week,”’ writes Mr. Lansing, “it is obvious that $10,000 a year has advantages well worth the consideration of any ambitious man or woman, I shall always be grateful to LaSalle for the help it has given me in building a greater income.” Send for This Book—It’s Free Do you appreciate what Accountancy means in the business world? Do you realize that it consti- tutes the indispensable foundation for success in any business undertaking? Would you seriously fit yourself for positions paying $3,000, $5,000, $10,000 a year and even better? LaSalle has prepared a 64-page book entitled **Accountancy, the Profession that Pays.”’ The in- formation it contains is of very real and definite value. It will pay you well to read it. And— LaSalle will send it to you free, Balance the two minutes that it takes to fill out the coupon against the rewards of a successful career— then clip and mail the coupon—NOW. ——<——=— Find Yourself Thru LaSalle! - == LASALLE EXTENSION UNIVERSITY The World's Largest Business Training Institution Dept. 1264-HR Chicago I would welcome details of your salary- increasing pian, together with copy of ““Accountancy, the Profession that Pays,’’ also a copy of *‘Ten Years’ Pro- motion in One,’’ all without obligaticn. OHigher Accountancy Training for positions asAuditor, Comp- troller, Certified Public Accountant, Cost Accountant, etc, Other LaSalle Opportunities LaSalle opens the way to success in everyimportant field of business. ifmoreinterested in one of the fields indicated below, check and mail now. OBusiness Management O Personnel Management O Modern Salesmanship OBanking and Finance OTraffic Management O Modern Business Corre- O Railway Station spondence and Practice Management Orxpert Bookkeeping OLaw—Degree of LL.B. Oc. P. A. Coaching OCommercial Law Business English OlIndustrial Management OCommercial Spanish OFactory Management OFffective Speaking O Modern Foremanship OStenotypy

F ree Amazing Book It will tell you how youcan quickly and easily learn to play beautifully right in your home and in your spare time. The Open Door to Popularity Music will open wide the doors of social suc- cess—make you thecenter of popularity every- where. You will be surprised and delighted t: find how easily you can learn with the famous National Academy Method. 200,000 successfu! students. Low cost, easy terms. Courses in Piano, Violin, Trumpet, Voice, Banjo, TenorBanjo,Organ,Spanish Guitar, Hawaiian Guitar,Mandolin. Write Today. NATIONAL ACADEMY OF MUSIC Dept. 26 702 East 41st Street, Chicago write MASTERLY Speak ENGLISH Learn correct English with Sherwin Cody's new invention: No rules to memorise. Like a fascinating game. Spar j time study, 15 minutes each day, quickly gives y - ¥ mand of English. Send for free booklet “ How to Speak and Write Masterly English.” Write today Sherwin Cody School of English, 512 Searle Bidg., Rochester ] = 2 2 352-Page Catalog Books of ali Publishers | Save time and money when buying books. Here is one | central source carrying books of all publishers. Quantity | buying permits lowest prices to you. Send for Annual Illustrated Catalog describing over 25,000 used by public, private and school libraries and everywhere. Itisfree. Write today. THE BOOK SUPPLY COMPANY, Dept. 13 231-233 West Monroe Street Ehicago, lilinois |

Make money taking pictures. Prepare quickly during spare time. Als earn while you learn. No experience necessary. jew easy method. Nothing else like it. md at once for free book, OPPORTUNITIES IN MODERN PHOTOGRAPHY and full particulars AMERICAN SCHOOL OF PHOTOGRAPHY . Dept. 1359 3601 Michigan Ave. Chicago, U.$"A

Learn Watchwork, Jewelrywork and Engraving A fine trade commanding a good salary, and your service always in demand. Address Horological, Dept. P, Bradley Institute, PEORIA, ILLINOIS, for our latest catalog

E My big 1928 RadioCat- alog, Call Book and Trou- _ ble Finder. 132 pages about .. Radio, Chock full of newest cir- cuits—kits, transmitter parts, short wave outfits, eliminators and speakers. Thousands of bargains at lowest wholesale prices. A regular Radio Encyclopedia— Free. Write today. American Auto & Radio Mfg. Co. HARRY SCHWARTZBERG, PRES. Dept. 265 American Redie Bidg., Kansas City, Me.

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POPULAR MECHANICS ADVERTISING SECTION 43 FREE How-to — Blue Prints

= [New Easy Practical Way — Leads Quickly to $4,500 to $12,000 a Year ishers | Thousands of Men From All Walks of Life Have Discovered an Altogether New Way to Double and Triple Their In- comes! Surprising, Yes—But True! Almost Over Night They Have Taken Their Choice of 9 Interesting, Big-Pay Jobs—Become Foremen, Superintendents, Estimators, Real Estate Experts—or Are Making Big Money in Business for Themselves. The Same Wonderful Opportunity Is Now Offered You. Don’t Send One Penny. Just Mail the Coupon for Full Set of Valuable Blue-Print Plans, Big Free Book, and Complete Details. Bi pay jobs by the score, yes, by the hundreds, me taken by cuperte right the ugh every etep of Plan Reading, Ft. 2 : . y : M 8 ati and S yerint ( ce 80 simp anc it 1s ji waiting for you in.the world’s richest indus- ey a ee ae pose * yo ~* pe bent ad, po b il ling. There is a constant never-e nding call understand every word and absorb every fact trained men—and still more trained men—men _____ Big Pay in 3 Months | who have practical headwork training qraiaes bas Gunn tor Gees.” Wendaiae ts tee an ind e-.n read Blue Prints and run jobs. R E A D! three months, rises to foreman, then makes big money in contracting business for himself. In a few months Manv men think the only Ww: Ly thev . McAvoy goes from bricklayer on the wall to foreman ak oO : : al S ur servis Ba | Kind of Training E. F. Baker, Ohio yourself. Don't send one penny >, Bradley fYo oe : Just mail the coupon. We will Near Chicago But it’s all different— send you absolutely FREE a rday — dl the new Chicago Tech. full set of practical, ort day ¢ : . Prints ale raters » @ _ Tr Builders’ Course way—amazingly Blue Prints, also valuable book, low To "000 Builders different! It's quick, easy, certain Read Blue Prints.” Act at gue as o Free ! s a, easy, ain. Tris , ay red again i You ean Right at home you get real Blue Trial — See may not be offe 8: e same train- Prints used on actual! jobs to examine CHICAGO TECHNICAL SCHOOL FOR BUILDERS, Hp and keep for reference. In language Dept. R-140, Chicago Technical Bidg., ao me tail you can understand, as plain as A-B- 118 E. 26th St., Chicago, Ilinois. ipon for de C, everything is told you and worked Please send your Free Books and Blue Prints which I under- out for you in concise, prac ‘tical home stand are mine to keep without obligation. It is also understood lessons—no textbooks to study—you that no salesman will call on me CHICAGO TECHNICAL |... SCHOOL FOR BUILDERS !- | Dept. R-140 118 East 26th Street CHICAGO, ILL. Speuneestnecenakatints hiss steehess soos 6 sees a5 66:

—-— ee

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POPULAR MECHANICS ADVERTISING SECTION Electricity as Experts Know It/ HiS is the electrical age, with unlimited opportunities for the man who has educated himself in the finer points of electrical practice Fit yourself for one of the really big jobs by knowing electrical practice comple te, II uding inside and outside w rk, central stations, and the nole byect With the aid of the Croft books you can knc closteiclts us experts know it and put yourself in line for an expert's pay. The Croft Library _ Big Demand For Trained Men shortage of watchmakers, watch and clock repair Grasp this amazing opportunity Steady employme 4 4 bd section of the country Uncrowded money-making oO rac 1ca ec ricit help you get big-pay job Or you can own your own ret easy to start—we show you how fine income right : +s beginning NOV ] . . start overs A reference library and self-training — 1g Li, p eo SO Se employer ital “ . ? us for trained men Greatest opportunity of your li course in eight volumes. 3000 pages Flexible 2100 illustrations binding WE TEACH you QUICKLY In these volumes Croft teaches you electrics practice we nr He fatoee med Z ae. — for easy Takes but a few months to learn. Day or night school, n . walt. . , : all personal instruction Our profit-sharing plan help ee Sen Se ee eee 6 Se cae handling | tuition. Work your way through school. We helt plete and economical operation of a great central part-time job . : — station He tells you all that he has learned in “ > : twenty years of shirt-sleeves practice a R E Be & Oo Oo Write today for interesting With these books at his elbow a man can learn as watchmaking It shows nuch at t elect icity in he : ~~ geo tremendous growth of the watch and clockmaking industry heal boon pan ge Ay ei good ae need for expert watchmakers and the wonderful money ordinarily learn in a lifetime of practice hie oe: Boothe F, = men who are trained by our competent instructon — ? . rite Today. NO OBLIGATION, : : NATIONAL SCHOOL OF WATCHMAKING The Standard a Practical 1340 South Michigan Avenue, Dept. 15, Chicago, Il. Electrical Training The Croft Library is a complete electrical educator. It is founded on practice—on work as it is actually done It is jammed from cover to cover with the kind of hard-headed facts you want Written so that the beginner can easily understand it, yet so sound, so thorough, that it is the daily guide of 59,000 highly paid electrical workers and engineers. FINE TONE Croft tells you the things you need to know about motors, generators, armatures, commutators, transformers, circuits, switchboards, dis- $20 Musical Instruments tribution systems—electrical machinery of every type—wiring for Your choice of a Violin, ‘Tenor Banjo, Hawaiian Guitar, Banjo, Cor light and power—wiring of finished buildings—underwriters and net, Ukulele, Banjo Ukulele, Guitar, Mandolin or Banjo Mandolin municipal requirements—illumination in its every phase—the latest You will be proud to own any one of these instruments and we wil and most improved methods of lighting—lamps and lighting effects, give you one without cost. A few cents a day for lessons is your oly etc 10w to do a complete job, from estimating it, to completion. expense. Our system of teaching is soeasy that you can | pieces by note with the first four lessons. We guarantee success or y ment and lessons sent on ~ Lan 8 free trial. Write for booklet tod Oo one own tion Over 200,000 satisfic CHICAGO CORRESPONDENCE SCHOOL OF MUSIC, INC. 10 Days Small Monthy Payments 1632 North Halsted Street, Dept. 413, Chicago, Mlinois. FRE: > Fill in and mail the coupon attached and we will send you the entire set of eight volumes S| RIATI Bifor ten days’ Free Examination. We take all the risk—pay all charges. You assume no obligatio»n—you pay nothing unless you Just Mail decide t eep the books. Then $1.50 in ten days and the balance at the rate of $2 a 0 Ser > COL n NOW ar > the ’ — st und see the Wonderful, new device, guides your hand; correct your Writ . “ in few days Big improvement in three hours. No failures Com plete outline FREE. Write C.J. Ozment, D-34,8t. Louls FREE EXAMINATION COUPON ALWAYS Ask For DENIS N?S—S2 Years of Hts Comedy- Dramas Vaudevillé Acts McGRAW-HILL BOOK CO., Inc., 370 Seventh Ave., New York Farces, Musical Monologs, ‘Dialogs, : , . ; Comedies, Revues Entertainme: Send me for 10 days’ free examination the Croft Library of Musical Readings, ‘omedy Songs, Chalk Talk Books, M Practical Electricity If satisfactory I will send you $1.50 in 10 strels, Blackface Skits Make-up Goods. Catalog FREE. days and $2 monthly until the special price of $19.50 is paid T. S. DENISON & CO., 623 S. Wabash, Dept. 9 CHICAGO If not wanted, I will return the books at your expense. (To insure prompt shipment write plainly and fill in all lines iiescuaks aioe ie aaa | WANT THIS JOB’? $1700 to $2300 a Year — MAIL CARRIERS— POSTAL CLERKS Ctty and State Men 18 up Steady Work Paid Vacation Position Write immediately for FREE list of positions 4 full particulars telling how to get a positi Suastever “ FRANKLIN INSTITUTE (Not connected with U. S. Government) Dept. S-306 Rochester, N. '

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POPULAR MECHANICS ADVERTISING SECTION four Jeb Young Felli 1, no book, ps yt sustry, making} ; instructor AKING rago, Hil. . Banjo, Cor Mandolin, 3 and we will } is yourony play several USIC, INC, Lionel Strongfort Pronounced by Dr. Sargent, of eed Harvard University, the finest your writin specimen of physical ar A ment he had ever — My Free k of Hits This book of many pages and dozens of pictures my wonderful experience. It tells what I done for others, what I can do for you. It loesn t mince words. It tells plain truths. ‘*Promotion and Conservation of Health, Strength and Mental Energy,”’ points the way from disease and weakness to health and strength. It is priceless. I'll send it to you on Tequest—F REE. Write for your copy today. Se a Physical and Health Specialist DEPT. 409 NEWARK, NEW JERSEY, U.S.A. LLddddddd ddd Acts, tells jaiogs, | jents 1a 4 t) ster, N. Y You can make it a body to be proud of—a dynamic, powerful machine, capable of performing wonders that will make others marvel at you. Nature gave you a wonderful human organism and she equipped it with intricate machinery for you to run it with. Your job is to take care of that body—to operate the machine WITH YOUR MUSCLES! It’s up to you, young man, to give your body at least as good care as jyou’d give an automobile or any ordinary piece of machinery. Give it a square deal! It’s easy enough if you'll only be man enough to do your part. Take Up the Science cf STRONGFORTISM For Building Up Bodies STRONGFORTISM works wonders with run-down, weakly, skinny fellows. It builds them up to health through internal muscular development, then rounds them out into robust physical specimens, by bringing into play every muscle and making every muscle do its work as Nature intended. You'll be astonished how quickly you'll feel the benefits of this best of all health and strength courses. You'll feel like a mew map almost from the first day you start under my instructions—and you'll look like a new man! It Wakes You Up } You'll be surprised at the lazy muscles you wake up when vou begin, and they'll wake you up in turn. You'll quickly realize that a new day has dawned for you as you feel the red blood coursing through your whole body like a bounding mountain stream. The old, stupid, sluggish feeling will disappear like magic. That gl outlook will vanish as though a heavenly hand had brushed it away. Oh, it's ag feeling! Great to feel like a man! And you surely will when you adopt Strongfort as your instructor and guide—STRONGFORT, ** The builder of men.”’ Strongfortism Restores Power by ridding the human organism of distressing ailments and irregularities that have clogged its normal action and thrown its delicate machinery out of gear. Strongfortism strengthens the vital organs; brings back health, strength, vigor, vitality—the ability both to do things worth while and to enjoy to the fullest the good things of life You can banish Constipation, Indigestion, Dyspepsia, Catarrh, Nervousness, Insomni Mental Depression, Timidity—most of the common ailments men complain of —by system of gaining health and strength and stamina by natural methods withi: reach of every man who has enough manhood left to list:n to my words of instruct and advice. I Want to Send This FREE Consultation Coupon Send You ABSOLUTELY CONFIDENTIAL Newark, N. Please send me absolutely free nm HEALTH, STRENGTH AND MENTAL ENERGY. have marked (X) before the subjects in which I am most terested Catarrh Overweight Great Strength Colds Constipation Lung Troubles Asthma Weak Back Round Shoulders Headache Weak Eyes Stomach Disorders Rupture Rheumatism Increased Height Pimples Short Breath Insomnia Weak Heart Other Ailments Name Age Occupation Street City Md dhhdd Mhddddddbd Mhidddbd hh. Ldddddddbddddddddddddddde Zz Lidbddddddddddidddddbd Mr. Lionel Strongfort, Strongfort Institute, Dept. 409, N. J your book, “PROMOTION AND CONSERVATION OF » of in- Thinness Nervousness Muscular Development

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POPULAR MECHANICS ADVERTISING SECTION ““T’m making rea money now” “See that coupon? Remember the day you urged me to send it to Scranton? It was the best thing I ever did. “Mr. Carter called me in today. Said he’d been watching my work for some time—ever since he learned I was studying with the International Correspondence Schools, “Then he asked me if I thought I could take over Bill Stevens’ job. I told him I was sure I could— I'd had that goal in view ever since I started my I. C.S. course. “T start tomorrow, Mary, at an increase of $60 a month, It’s wonderful how spare-time study helps a man to get ahead.” For thirty-five years, the I. C. win promotion, and in life You, too, can have the position you want in the work you like best. Yes, you can, All we ask is the chance to prove it. gation, just mark and mail this coupon. Write for Free Booklet S. has been helping to earn more money, to get men to ahead in business Without cost or obli- INTERNATIONAL CORRESPONDENCE SCHOOLS “The Universal University’’ Box 5691-E, Seranton, Penna. Without cost or obligation, please send me a copy of your book- let, “‘Who Wins and Why,” and full particulars about the course before which I have marked X in the list below: BUSINESS TRAINING COURSES siness Management {|} Salesmanship strial Management } Advertising mie Organization ]Better Letters affic Management }Show Card Lettering business Law JStenography and Typing sanking and Finance Ma meagement JErglish Accountancy (including C.P.A.) Civil Service Nicholson Cost y recess z }Railway Mail Clerk Bookkeeping [ J€ ommon School Subjects Private Secretary |High School Subjects DO French JIllustrating C) Cartooning TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering [Architect Electric Lighting JArchitects’ Blueprints Mechanical Engineer }Contractor and Builder Mechanical Draftsman LjArchitectural Draftsman | Machine Shop Practice L}Concrete Builder Railroad Positions { ]Structural Engineer jJGas Engine Operating rc hemistry Pharmacy Civil Engineer [) Automobile Work Surveying and Mapping [ )Airplane EF ngines Metalluigy C) Mining [| JAgriculture Lj] Steam Engineering | |Mathematics Spanish Cj Navigation 0 Radio Name Street Address City Occupation Persona residing in ‘Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada Learn How toBoX JIMMY DeFOREST cotrse is Teaches bymail the SameSystemhe UY ~¥/ taught Champion JACK DEMPSEY As In 20 weeks, under the System of Jimmy A DeForest, WORLD'S GREATEST J Sy. TRAINER AND MAKER OF —— La CHAMPIONS, you will master the S yriceless knowledge that made Jack Jempsey his millions, and fortunes for a : . host of other Jimmy DeForest-trained s ring stars. Boys who were once rank amateurs are today earning big money; weaklings have been made strong, cour- ageous; men have le arned the art of self-defense the now famous book ‘THI GOLDEN AGE greate 0 C ever wr full of valuable informat fie a “ ar 4 esses over nig t nelose 10c t whi E NOW. JIMMY DeFOREST BOXING COURSE 347 Madison Avenue, Box 125, New York City » ecome a ‘ 1 | | Attractive money making opportuni- ties in Portrait, Commercial and News Photography, or Get Into Motion Picture Photography. Camera Men Earn $50 to $250 a Week. Fascinating Work: in big demand You can learn at Home or in our N. Y. Studios FREE BOOK Tells How— Hiow to prepare for High Salaried position How to start your own business. How to make money in spare time. Write for this big illustrated Book and Job Chart today —FREE. N. Y. INSTITUTE OF PHOTOGRAPHY, 10 West 33rd Street, New York, N. school. EARN $50 TO one WEEKLY John Vassos, N. Y., gets be 935 | for, single show ecard. Crawford, B. **Earned — taking —— ** Don’t rt aay. Send today DETROIT SCHOOL Ol OF GST rERine ve. Write today for this new book. It tells you how \ alaw training will shorten your road to suc- cess. It also carries a vital and inspiring mes- sage to every ambitious man. Find out abou* the opportunities that await the law trained mao. Find out how you can learn law rightin your ow home. No obligations. The book fs abeolutely FREz. Write Today—Py yan’ low tuition fee American Correspondence Schoo! o 3601 Michigan Ave, Dept. 1359 (Eady mM, TELEGRAPHY Morse and Wireless) and RAILWAY ACCOUNTING taught thoroughly salaries; great opportunities. Oldest, = achool, Endorsed by i Railway, Radio, and Government officials Lxpenses low yo~tur . lerze portion, Catalo — free. DODGE'S IN TITUTE Jon t., Valparaiso, int mm Skin Troubles Cleared up—often in 24 hours. you can be rid of Pimples, Blac haste ha Eruptions on the face or body, Barbers’ Itch, Eczer a, F larged Pores, Oily or Shiny Skin, simply send me your Pa and address today—no cost—no obligation. CLEAR-T tried and tested in over 100,000 cases i toilet er 3 simply magical in prompt results. You can repay t by telling your friends; if not, the loss is mine. Wrrire Topat E. S. GIVENS, 428 Chemical Bldg., Kansas City, Mo.

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POPULAR MECHANICS ADVERTISING SECTION

Mail the coupon and we'll send you a set of these remark- able auto books, just off the press. Whether you are mechanic or helper, expert or student, auto owner or driver, if you're interested in autos, by all means take advantage of this opportunity to see the latest and most complete work on autos we have ever published. Built by eight- een of America’s greatest automotive engineers Simple enough for men with little schooling to understand, yet in.daily use by hundreds of engi- neers, service-station superinte ndents and foremen as an authoritati REFERENCE Cyclopedia This new ve edition includes straight-eights 4-wheel brakes of all types and other features of the 1928 models Put the JIFFY INDEX to work for you! = The billion-dollar auto industry offers rich prizes to men wit! gumption enough to really learn all branches of automotive mechanics A better job, bigger pay—a chance to go into busi- ness and get a share of the huge profits, are waiting for any n . > who even half tries to improve his ability to deliver service And her 1 ts il re out “pl: uy’ in diffe -renti: al? Can the shortest, easiest way: No ved ious studying, no memorizing ‘ ’ lessons or examinations. Just LOOF P the fa yu seek yor e “Shimmy” in steering? Can youreset “S'S OF ©samlnatio et ae ona ‘G? Can you put your finger on engine ss lem literally at your finger-tij ph tna. ape a a the famous JIFFY INDEX ithout guessing or tinkering? Can you ‘ - need to ‘carry it in your head tarter off and fix it? Can you adjust and jonee [one foc, all nsmission, engine, rear axle, bearing? “Was garage hand—now have ' r = : ee of my own,’’ writes W These Books Tell How! Eel abel you how ese 00 Ss : J. H. Geise of Detroit says to sue- g the answer to any auto problem instantly. ceived $50 worth of ng mes- w the best, quick, professional way todo EVERY of them the first 5 day at abou’ replacement job you will ever need. Auto owners a J Sot a raise,’’ says P. Ervin of t is saved over and over again by showing how to Yar ne = N. S., shortly after get- tments and emergency repairs on the road. ting his book: ition fee ame D S. Reid of Siluria Ala , [£2 Big DeLuxe Volumes BREE was offered $4000 for, invention . 1 lust off the press! (57 VITE Penn i harts, ete. De Luxe edition with gold-stamped ding - k ee for pone yor g be —— AMERICAN TECHNICAL SOCIETY. mee o rey i pt, send only 9< a 4 80, o¢ my Dept. A-919, Drexel Ave. and 58th St., Chicago, Ill. nth until special advertising price, $24 is pai I would like to see the new 5-volume edition of your AUTO A Year S Consulting Membership FREE! BOOKS, but without obligating me to buy them “1 will pay the few cents delivery charges only, but if I choose to, I will return them express collect and owe you nothing If after 15 f f consulting engineers of million-dollar American days’ use I prefer to keep them, I will send you $2 and pay the Society on any automotive problem for one year balance at the rate of only $3 a month, until $24.80 is paid rge, if you mail coupon immediately. Please include free membership Ban erican Technical Society Name Address Dept. A-919, Drexel Ave. & 58th St., re Topat Employed by City, Mo. CHICAGO, 52... Address

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POPULAR MECHANICS ADVERTISING SECTION $4.00 AN HOUR Dear Mr. Cox Just finish oy "four electri- cal jobs in 11 hours, making 41 -- almost $4.00 an hour. ouldn’ t take a million dol- lars for your wonderful Course. Peter J. Terle paky Exeter Bx P 236 Or chi urd Street Pittston, Pa. 515 A DAY adn't ‘take n your Course, e like the helpers here gettin, ; Lede of the $16 a day am getting E. B. Gaskel P.O Bo: x 14 ; tone > park N. J. HY earn $15 or $20 or $30 a week, when in the Kis same six days as an Electrical Expert, you can make $70 to $200 — and do it easier — not work half so hard. in i rs Why, then, remain in a small-pay, no-future job that offers no chance for big promotion — no e chance for big income? Fit yourself for a real job. Get into Electricity. That’s where the big money is being made, and always will be made. ; Electricity — The Big Pay Field Today even the ordinary Electrician — the “screw j driver” kind — is making money — big money. But 0 it’s the trained man — the Electrical Expert — wh makes the really big money — $12 to $30 a day — $70 to $200 a week. Be a Big-Pay man, yourself. Get in line, now, for one of these I EARN TO EARN ii . > Big-Pay” Jobs. I'll Train You At Home é 7’ll train you at home — in your spare time. You work just as you are working now—at your same job My now famous *‘ Work-Sheet and Job-Ticket’’ method, guarantees you simplified, practical training along work-shop lines. In a few short months you can step out of your old job into a new job — into electrical work where you can be a Big-Pay man in this Big-Pay field. You Earn As You Learn To learn Electricity my way you don’t have to be a Collegeman, or even a High School graduate, You canread. Youcan write. That’s enough. With me, you get experience as you go along and make good money while learning. I’!! show you how — and I’1l give you, without extra cost, tools and apparatus to work with — 6 Big Outtfits in all. Money Back If Not Satisfied That’s what I agree todo. And back of me in this agreement stands the Chic ago E ngineering Works, a $2,000,000 Illinois Comperation. There’s nothing like ‘‘Cooke’’ Trainiug, an: where. It’s the Traioing that big Electrical men are praising; it’s the Training ge employers recommend; it’s the Training that one of our greatest Engineering societies, has endorsed 100 percent. It’s the Training for you. BIG If Not Beruing aden A Week UTFITS Don’t wait a saeunt Find oat Me today why ‘The lll train you Goose Trained man is Oe: Pay Man’’, everywhere! pay! | Find out how **‘Cooke’’ Training will help you boost a few sho NO EXTRA your pay! Mail coupon right now for my Big FREE months. CcCOoOsT Book of Facts. See the Six Big Working-Outfits I L.L. COOKE ive you without extra charge. See the hun- “. \ ANY rede of pictures, the , proofs, the Big-Pay ‘ letters of other ‘‘Cooke’* Trained Men. Get ‘alele DON this great free Book. Send for it today, Clin, sign, and mail coupon, RIGHT B O e NOW! L. L. COOKE, L. L. COOKE, Chief Instruction Engineer Chief Instruction Engineer / Dept 19, 2150 Lawrence Ave., Chlesgs, it, Send me FREE and Prepaid. your Big RB crets of Success in Electricity with «a about your Home Study Course in Electri OF ELECTRICITY 7 fm Z Dept. 19 Sy Address Ofer 2150 Lawrence Ave, ig = City —— _ State Residents of C Benede send coupon to R. A. Farrow, 5p* wh Chicago, Ii oy odie MES Le | fe ‘Cooke a s the Big Pay!

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POPULAR MECHANICS ADVERTISING SECTION 49 Classified Advertisements WORLDS BEST WANT AD MEDIUM

ments in this section, 30 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

ADVERTISING AGENCIES EVERY ep ochante and Sp = AUTOMOBILE SERVICE EQUIPMENT man, needs the ‘“‘Hands Free’’ flashlight. TTR = ~s ~ , = nd Increase Your Business by Has adjustable belt to fasten around chest, a he wie ana e a Sonn ag MH, it of town trade. Our Service two standard flashlight batteries placed side hour ct Z ing ns uipment Al o hanell out- ides you on every _detaii. Copy | by side in beautiful case. Ideal Xmas pres- fits in first class condition, Write quick composed free. Your 24-word | ent. Complete $2.50. Was originally $5.00. for bargains, I. C, Helmick, Box M-1273 inserted in the following 10 Fre mee Progucts, 177 New York Ave., New- Troy, Ohio. ee i apers for only $10.00. Cir- ark, N. J. a a Tr — ion 4 lean 4 - Gazette, Little Rock; FORD Gas Saver Free. To advertise. Fits | _ BIG — = — ee lanta; Star, Indianapolis; Jour- | any auto. Enormous mileage increase. Critch- | S¢*¥ice and practically no investment rf ; Star, Kansas City; World- low, G1-805, Wheaton, Ill ye ol st and bn ae es : . - ‘ ee , - ——_______—_— gnitior y e ith new low- a; Courier, Buffalo; Enquirer, JUNK auto tires cost $10 per ton. Our priced test benc’ Shipped on trial, Small vette Times, Pittsburgh; Ban- Hoxie converts them into demandable, sale- monthly payments. E. C. Galbreath, Box Proof of insertion guaran- able Mds. that sells anywhere for $200 a M-1274 Gian ; - ss refunded. 56 page rate Book ton. $200 starts you, investigate Ad- — aT ——— - - - nt free. Frank W. Lenhoff dress Hoxie, 106 East llih St., Los An- START A money making business of your Agency, 600 North Michigan geles, Calif own = with oe equipment for serv- (Established 1897.) Chi- —s - Wire : - - icing automobiles wery car owner a pros- eae ome b - : VULC ANIZING “Auto Tires ‘ : pect Write for new illustrated catalog of : essive Advertising Agency. Business We have plants near . car washers, air compressors, battery chare- ur Ad may put your proposi- up. Catalogue free. Equipment Exchange, ers, paint sprayers yore ‘al testers, et pays for a 4 line 24 word 108 East llth, Los Angeles, alif noe The Hobart “Industries Inc. Box M-1 Hea ge aA in 2 oe ween , gnereners. Mz ’ a tr, Troy, Ohio a 1 = flectrical Equipment, Bearings, and every- x, yyy ay thing in Automotive Equipment and Parts FOR AUTO OWNERS ress, Kansa ity Star, itts- , 7 e mond inten te cs omue oa ladienanetie : eae ‘Asien Ww rite for 150 page illu: trate i atal gue FORD Gas Saver Free. T nati E sees anda bargains. Leterstone Sales Company it Enormous mileage in alk Enquirer ree catalogue Wabash Ave., Chicago, Ill w "G 2-805, Wheat r lists of newspapers and maga- RADIATORS ; hol “Vp : Ze ce request. Ankrum Advertising - : 5S at wholesale prices UNDE RSI. 1 Le J West Jackson Blvd., Chicago standard makes. Satisfaction guaranteed . fied advertising agency Send for prices, stating make and m del — agency in tae Independent Radiator Co., 1119 8S. Wabash —— Ave., Chicago g Sunday Newspa- —— — ox be at gg a af AT Last! Reasonably priced Auto Em- d Business Oppor- blems for every Lodge Sells for only 1,000 leading $1.25 Write for attractive selling i a Order Magazine tion and free Sample Case offer : tai “Belti, Centra Jistril yr Yept. 9, Wade Advertising, Balti- chia. al Distributors, Dept

is

Ss Get | on 4,000,000 word Circular free. N. ¥

“A iams-Barr, Colum MOTORCYCLES, BICYCLES AND SUPPLIES h, Box

FAMOUS GOOD used parts for dia Just » lot i n y V mn vidsor I elstor Hender Rat t “Owl Agen- to include all latest fae egarding new ahs f new prices . "7 ew Catalog. Owl Agen- | Gevelopments. Information on repairing a1 oF alt “ta an B antes - adjusting ery of all motor cars v anal . Sul ick y 7 \PER — Magazine advertising— to find tro é fix it ? ity lorder, ¢ alog. Martin, 276B { l ‘ New York Moroce ‘ ‘55 rural weeklies $3.55 where in 2 M Hartford, St. Louis postage wher s 7 Mechanics ess, Room 912 FOR ADVERTISERS tario St., cag oo

ISERS uur 24 word ad in : SALES PROMOTION »_- MOTORCYCLES at R n dailies $5 ; 40 words, 50 mag- . . . ETT S—$5 urp 08 eek 4 Ask nearest jeweler, accessory or LE ER: $ Murphy, Lost Creek, Pa dealer or order direct from us AUTOMOBILES white dials, 50c extra for radio- B.. ‘for ¢ 1g eee wall “ pig se PATENTS. Time counts in applying for 5 me ane - you Foo te patents. Don’t risk delay in protecting Fits any size pocket | Your ideas. Send sketch or model for in- Nickel $1.50. Terri- struction or write for free book ‘‘How to retailers ask for our | Obtain a Patent” and ‘‘Record of Inven- Practical Specialty “C4 Inc tion’ form. No charge for information on m Streets. Phila.. Pa 3 how to proceed Communications strictly - confidential . fi » ient serv- Wanted to Resilver Mirrors at ice. Clarence 'B Registered Pat- » profits plating auto parts, ta- ent Attorney, Secur Building (di- YOUNG i for information. Sprinkle, rectly across reet from Patent Office), free, write i Washington ’. See pages 156 and 157 son Aviation

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HERD it is—the new revise: Rathbun’s book Aeroplane Cx 0 n ontai ail the latest models of pl flown by Lindber latest en ete E. Ontar h¢ BOOKS AND PERIODICALS THIRD edit ) Operati POPULAR MECHANICS ADVERTISING SECTION ELECTRIC Fun! Seventy $1 PaCutting, Campbell MAGIC tricks, Card ic Hypnotism, Ventriloquism Complete guides 10« eacl 2401 Jefferson, Louisville K ILLUSION Catalog 7c. Lynn’s, 105 Bea MYSTERIOUS x w becor Ma tor New Hunt Br MAGIC y rant I Free amples W. Va ~ SEVEN Ma L De - Gilma 7 M GAMES, ENTERTAINMENTS AND pL CHRISTMAS present N tef i Rg] I'wentieth Ave VENTRILOQUISM at Small « PICTURES AND POSTCARDS LUMINOT MAGIC TRICKS. BOOKS AND JOKER NOVELTIES

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Ls ND PLAYs foration ee, mail POPULAR only 12c! Fine man stamps with illion d irs gauge, mme é set; scarce stamp from on earth; newspaper 6et; mps from Travancore, Malay, t Entire outfit for l2c ants! (Nice pocket stock with every order Ancher Clerk St., Jersey City, Outfit 1 set Ger fort " All Argen- = 4 idies y M ake her with an ear rd Avenue set to approval appl postage 4c Noemus rd Street, New York 10 Stamps, 40e William 8th Avenue, Brooklyn h ae E Ohio. ants. Stamp ivside, val appli Mills, Wis of 48 different Costa Rica (cat etc., and large All for ten River, Nova ) apa Lake ‘ sets gains in imp Co., Bear

MECHANICS ADVERTISING Think! id big Co ‘ TRIANGL ES: 75¢ ets with ea gles, 2 befor UST tamp TRI ‘NGL ES Africa 1lt« F cine, Wis GREA l0c; wor Frey, 527 100 FORE IGN provals 50% off, big bargain lists Stamp Co., Mich GREECE-T Surprise V ROU MANIA—2 Lists free Allion MAGNICAROCIOUS Packet stamps, beauties fror listant lands richly colored, unusual de free Gray Stamp Company 7 ( 85 DIFF ERENT U and many t world, 25« Mou 35> Mannington BOYS! <A _ watern ns, perforati different TX le lo, TRL ANG HL, / Ss ferent, I Hanis = Fir" applic ~ FREE “L ne " Ave . : foreign (Many for & sigr

comme 7 DIFFEREN hind, nt t Suda many nmi with amy Texa DANDIE Ss Schaller Medf FREE Pricelists UNITED ifte STATES F _~ E—Bri t ag Craven Conn GENUINE ZR TT og $1.00 rice Plainfield, N. J COLOMBI aS - ar Inquiries inv Ave r $1.00 Lincolr 5e. $1.00 Frank Approvals. Gol 1248, Chicago, ~ 1,000 HINGES Only to real buyir sheets Pettet Br E., Atlanta, G 25 DIFF is RE NT plicants ‘ Luge, mm toon Kenya Gold Coast Persi - wr Tip-T pl ‘olorado Sprit STAMP Tor tion, 50c 10 Nya Topics, 423 We FREE Bulletin! and

SECTION FREE Different ireenwood STAMPS lease. Pi Sent i) MIXED isted, I STAMPS On F R E kK al Appli 2 », Oak ari Il! DIFFERENT 10 R. H Salt I NEW ike Ut STAMPS Peru, Cuba, wo. &., 35 10¢ List. Brilliante LIBERIA 8 triangles in our tamps for f Wa erty Balt COVERT( 0 Arr la stam] arieties Covert St

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POPULAR MECHANICS ADVERTISING SECTION MOST Sensational value ) 0 UNITED STATES, Large Cent, two-cent NEW and Rebuilt Proj Alceria. Airplanes, Azerbaijat Sarbadoes, bronze, three-cent nickel and Bargain List, Schools, Churches, Tray Guyane 2 € 2 fifteen dates large cents $1.00 plies and Complete Theat n } nwood Mountain, Me Bargain Prices. Free Cata sure in collecting Old rheatre Supply Co., Memphi Large Illustrated Coin FILMS $3.00 per 3 % 0) Bavar ic logue il lelighted wit! Ser Western, Cartoon Drama Cedar Rapids, 39, r it ight now B. Max Mehl m tional, Special Features Be tist 3] Dept > we I > List Toy Film 2 in Firm in th $ ). Dixie Film Co., Box 2 fall Selling logu Tenn Cata uc 10tin FILMS and t ten cents illias for lists Box ironberg, B hiladelphia, P € I 1A Tremont Street, Boston i Kansas City, M THOUSAND I i Quarter Size iC; COMEDY 100 feet, $0.7 al fre Prof I 4 L, : y ; ce ‘atalogu 0 ple Hill, Beechwood, tario Norman ultz 7 It ol FILMS for hest l Machines, dirt gas 0. 5836, We ( ( Bu lard i n DIFFERENT & unzil K t is City, M bum, FILMS $2.50 Reel. Camer Mo Seal ell fo Stewart Marshall, Rome, Ga REE ho § a Star see’ Wa aoaine “ty 000 FEET of 1 tion ict W ' St ola S " i I nt proval apy « t Calif . . Dept. 42P canal . ‘oO list et Film Exe Osborne Rd., Sout : , I t I DIF " CAMERAS AND PHOTO SUPPLIES . po >» , PHOTOGRAPHI DIFFEREN ps 4 Busteeted ta our 3 . = np juare t len Gate Ave., San I a eee tent process, » beautiful SCENERY TO RENT STAMIT’S mn ay ‘ Premiur i t rt f fun ar — Herbert Keicwi ! v profit ny = do utfit ania ; WORLD’S Most Beautiful 50 DIFFERENT Ur tat me , agai on play minstrels A nia REVENI EDUCATIONAL AND INST Ss GOVERNMENT RARE COINS ba MAKE COMMEMORATIVE Half D reulate for sale I t SECOMI } y titute. Dept ial Trial Offer FIREMEN ad Se, prints ! t in hand R SPECIAI nemorative NLARGEMENT 1 ) x I warm BEGINNERS t ~ { y xehar Place yew UNITED STATES tary ecoratior Alexis Meng MOTION Picture I t $3.50 Send for list Toy any. 804 South Wabash Avenue, Chi Ill

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POPULAR MECHANICS ADVERTISING SECTION Wanted for photoplays BUSINESS OPPORTUNITIES | A any EARN libera ! t e, not inter- fering with you reser rk Build sub- tantial paying busines paratively 18,000 i , free with Station CR#6 FURCRAFT at its possible yu rachine and ea 4 pare time for m mufacture Loi In u ‘ wow. N. W. Fur ¢ h; A ite, guaranteed radiat Re-Nu-Shu, factory refinish f ATTENTION! es; Klerzit, assures clear wit ystem real ¢ . it nderful 3 ; , $ answers, aids tpal J. Rochi, 1301 m, Be Be t i : e y Bookkeeping mastered in Miller, Chemist, 1 : — + 8 keys; iaranteed; diplo- FOR Sale by executive of corporation who nal Bookkeeping Institute, wishes to retire from active busine field, Mo. _ count of his health a controlli: \OMIC System, Masterkey 100 very profitable chemical manufact rs, 9 8; Arabic, Chinese, ) Plant running day and Italian, Japanese, Russian, ertain f its products contra 1ages, 15 W. 18th St., New nths in advance. The company owes g, has good bank balances, earned ar and paid income tax on this am in ye cated in healthy town where taxes are low shipping facilities excey wish to sell beautiful hor in a p » invest Box T ire yular Mtcl )000 READ The Mail Order New Pioneer Mail Trade Journa Quarter . tury Old. : ximately 600 pages ye time, writing valuable informs beginners Experience un- tablish né rde uses Ang Press Syndicate, order business, portunitie ble mail-or z: legitimate h Plate. Eas- ing schem r ins free 1 start « rings. Mo seripti 05.0 J 4) sen lisplay ad le ps t Mail Or MANUFACTURER with ale nm reaching pri pa ities in and papers vith ) m, me, ¢ k, A a, Ill OPPORTUNITY for Mact apital—t buy Fifty UTFITS AND SUPPLIES 10 A Batterie : { ves, fits furnishe sils MAKE M VALUABLE mail-order informati r ir West Fifth Street, Brooklyn SUSINESS Gel . Order lirect ay : ‘ i 16 is cron } d cles, oO ) 1 es, 116 Atlas, Akron, Ohio ni . ee ee iy oe t nple, not Taluabl free. Write at once imor attachm » 00 ition ntifie Laboratories, 1919 W larantee Rad , id r oo better Si V NEED More Money? Our method for n ‘ ~ batteries « - 1 order busir ffer 7 ypportun 2264 Hermany 000 homes have then le- § Particulars tor stam ros., Box 1753, “SCHBMER der sent free. ‘rysts Radio Los A! - . monthly, prints Wichita, Kans MECHANICS itp , ate Subseriber TRADE AND TECHNICAL SCHOOLS furniture refinishing, | ee Pe Radi ge a ng Lickly raceland, CHARTERS t rs earning big money Al- Ss Jinth, ladelpl free forms Col No experience necessary —— - al . om mington Del perator, Lllinois Telegraph, age “ ; ae . . Ci 5 npat Yo r in any trade. You : a ; amy “3 cent 2 gf ge ge culars suppli Heinemant East Tord, New 1 MAKE Big Profits ‘ ir ARTIFI( your backyard l i stri “tior : rat, Mink rit act 2 Conr inch tl! irey f, waterproof Ranch, Denver, C or I " SELL by mail ibber St per cent profit Our formu tructions $1 Money | Mid-West Stamp Worl SE t t l Wor ; gett’ Ween” Sine DELAWARE Ir nom §. Chi se Small: forms. ¢ EY or St., Wilmingt PLASTIC 1 leat eream for l i Y » e LEARN the lection business Make them all yoursel 4 n come ict r Interesting M 157 ] st “Skillful ¢ lectine’’ free National C tors Asst I St.. Newark, Ohio

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54 POPULAR MECHANICS ADVERTISING SECTION PATENTS ‘ime counts in applying for SUCCEED With Your Own Products, JIFFEX—Pays patents. Don’t « delay in protecting your Make them yourself. Formulas Processes, ike 20.0 ideas Send ske model for instruc- Trade-Secrets. All lines. Catalog, circulars tion or write for ok ‘‘How to Obtain free. B. Thaxly Co., Washington, D. C. a Patent” and ‘Re ~ Invention’’ form. SIGNS and Showcards Easily painted No charge for information on how to pro- with Letter Patterns. Large variety of ceed Communication trictly confidential Styles and Sizes Sample for stamp Prompt, refu lode service Clarence J 91 26 ca Ng . ‘iegl John Rahn, a2120 Neva Ave., Chicagt A. O’Brie > re Patent Attorney, _ RS Security ilding (dirctl across TELEGRAPHY street fr ; ) , Washington, TELEGKAPH Y—Both Morse and Wireless dD. ¢ See pag ud J —taught thoroughly and quickly Tremen- MAKE M dous demand i Big salaries. Wonderful op- evportunities for portu es Expenses low; chance to earn fone aememess part School established fifty years, Cata : : : log free Dodge’s Institute, H St., Valpa- COMPOSITION r gv ms n raiso, Ind dustrious men $12 ar nore l Ist as trade. Or make nie 7 h its CHEMISTRY up to $10,0 ¢ y Semi-Til De

YOUR Chemical or Industrial Problems —~ Solved. Fast id permanent dyes and « vi ney and free MAIL-ORDER i 3 vy po"- for spraying, painting or dyeing on fabrics, ubber Co., Phi ty Breniser i rorok leather, wood and novelties; also paints and AGENTS . il lacquers of extra fine brilliancy for particu ir sales lar requirements just phone ‘Chickering 9238’’ or write Malgo Products, Ine, 109- 115 W. 26th Street, New York City YOUR chemical problem solved and work- ing formula or process furnished 5.00 ) Write me W. Stedman Richard, Ind Particulars free Chemist, Box 2402, Boston, Mass 132, Milford, Ma CHEMICAL Analys Processes, Te ~AGENTS—Ar nieal Information Robert Hendersor at § new record-bre 4 LITTLI oratory, Madison, Maine nan tremer pettes, delightful confection EXPERIMENTERS’ Laboratory appa ils. Unit maker We star you la y f Cher ls List 5 Chemical Appara rt profit two days la summe n j 4402 West End, Chicago as we tr W er r . I ig yi ne60 Hich Bt focine FORMULAS AND TRADE SECRETS OPERATE chev n i sare DON'T sell for others Employ agents profits Small ul | rt ul é yurself. Make your own products. Toilet Robbins Company 28 xiwort str Articles, Household Specialties, ete. 500 ; : Brooklyn, N : rofit. We furnish everything and show you : ; 11) ‘APT’ boas » coor of The —_ , v Valuable bx et free. Write at once $ ae Ms = Hand Book aflet on financing, set ional Scientific Laboratories, 1919W Soar ge ge te ase $1.00 to Amster Leonard oF rang road chmond, Va “ x Macochee Compa we , Se oo ‘ iti, Ol ful sales _plar Ever y i - i i Home 19 Metr litar “*hicag 240 m MONEY for working « and sell shares in your busir € ¢ il organizing and raising mor ir i t ; any or 10e¢ of merit Terms reasonat rom, ! ' Her. | l » te 1y. Write confidential service l am rican Aecessories Co., Desk 507 Sth Ave., Suite 51 rk if ‘in Ohio We furn nth car

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POPULAR MECHANICS ADVERTISING SECTION a regular buy on credit al lute Lousel rs. Enjoy a sure income year after year City upital, experience & Co., Dept. 835, Winona, sell- Shines gift— Christmas money Crucifix which leal Christmas Big G state igo, Ill ats. Lowestprices, larg- Outfit free Sample n 1ilton Raincoats, 4111VY ar Owner and Mitten Dusters free. National Mo great new et Ray, Vit yxclusive Territory Lindstrom & Co. House - Sample Fibre Auto irticulars t. Louis, Health ntest Sell igar, Cigarette De Luxe Pen i case, marked Large commission ‘ s Free Wing, 0 Daily Easy sell y-measure every , ul I 1 r ri ! agents. ps. Sam Write quick Taylor nnatl, sition 7 ir Rain- Etc., @ut- VanBuren, car answering in Health-O-Qual- ( 101-P, Cincin- Write or (Sworn Hosiery exper Monthly Silk Mathews, Introduce Shirts 3 stvles $7529 capital le rking Lane outfit Company 15812, $9 98 Outfit Reosevel ra ar it hidelike coat f, 724-P WOMEN—$ ymumissior I eils on sight - an hour spare tin huica Sanit every womalr ture never before used le sicila evolt method pay tlections, n Writ 4 for » worker Chi FLAVORIN( Concentrated Whirlwind Se making oOpport facturing Com iticnizes = oll every lay I ») expericr Mary I’. ¢ l plan s Result get Write ago + Extracts add water llers 504 unity Write pany, Indianapolis ( OMBINATION Leatherettes mission $1.75 Ccemplete line $2.68 up El 1101 N LATEST Fiz to friends—m Independence, AGENTS M typewriters re-manufactured the “‘Young easiest terms no investm in | Young Typewr usihess Randoly St., NO Peddlir Office Big Elite, 38H E 6x swatches raincoé ab te Robey, fre how them ai—Samples $ Castle ake money Mo Studios, ike $40 to $80 weekly selling like new by Process Lowest prices and ever otfere tig commission iter ‘ Chicago, g. Start profits zabeth St., owl! AGENTS— 200 profit practical, usef office 0 k tion, Roselle, WRITE Atl ing equipment ters Penny fer t ener Chicago ul article for every seller Hydr N ais SS Te aL a AGENTS, Bi ti) RELIABLI Dread ight LDS D ll PENNANTS Penn JUS’ Out string or e str over | profit for free offer Louis, Mo ~ $50,000 canvassing weekly with men make n Portraits’’ ex Man Friedn Ch g NEWE and snarls electric ir companies mc ndous salesmen Rarensw $18 TO of 2-piece wool suit All-we coats, con In Chicago AGENTS frames ! ien run ¢ wi rukes Aprot riwind Wis No lay Write Milw New Patented 7 $20.00 a day sions da Dept commi Put C Sta PICTURE Mar Seginners my l re Free mlair in, Dept Sample 8-B, line plece value) rain- week and expenses t ntroduce pou WE pay $5 rd ry Imperial Co., D2 sf sam pe Gr TS—M 1 of Shi AGEN NEW INVENTION—4( k mend for Fabrics and Every oma! llers J 1 Wentwort AGEN uys rs Make Nx nvestn and Callous R steady repeat busi 0c trial out Bidg., mov ness fit. T ester, NEW us ] De wind t , et-size Rocl Searle vice wash walls, scrubs, 1 Over half pr st Fairfiel Iowa clear rooms ur taking Newark SUPERKEEN! New fagnet Biad 31 ner Shar} Ir “WHERE to vhol ee 72 Pittsbu AMAZING D > x rt fle

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56 POPULAR MECHANICS ADVERTISING SECTION

CHECK protection BEVERY Woman Wants a Sewing Set WE Start You Without a weekly with ease bree Home Sewing Sets contain 142 useful sewing Extract Perfumes, Toilet G for this fascinating ne articles $4 an hour easily made with this ence unnecessary. Carnation ( r equals r c seller Lee Bros., 128 E. 23rd St., New St. Louis acti : York AGENTS—Make a dollar mer ir “ay esse se - a REAL Whirlwind Seller—Nopulout Custom | Mendets, a -— % patch for it » a ile I I qu ‘his Maaeeal - “ we ‘ in al utensils s for details and special offe Arnold Check Shirt. Every man buys them atented—n¢ free. Collette Mfe ne writer ¢ Dept. W-10. Flint. Mich competition. Liberal commission. Free sell ‘ ette Mig. Co., Dey : - : : ing t Make $15 up daily taking order dam, N. ¥ - AGENTS $240 montl ito to travel i t from consumer at manufacturer’s NO Dull Times Selling I in tjonus besice Ir luce new line prices. District or local agents. Write No- eat Federal distributors 1 guarantes hosiery f I mer ! pulout Shirt Co., Dept Y, Hazleton, Pa $3,000 yearly and up. No ca $ dien 12 3 tore price necessity Nove ity Shirts, ence needed uaranteed sa v Guaranteed t W ew hose Kkwear Colonial Novelty Co., may be returned. We furnish free Fi t ! S you y ase, license and F Ss saw Ne Pa I ( ! n “Pp r wanted by over 500 tomers—Sure repeat orders. | time sa , W r samy \ ffering real money-makin tory Asi N Federal Pu kni Hosiery ¢ Dey l, G nfield >I i of bei out of wor A2307 Arct Chicago Oh ( Opportunity Maga . = , “ oom De A D " POLMET—The Wonderful P ‘ I agent . DOrvics ee — that cleans all metals without € ir DT OK I t : - - — or powder Approved by “‘G ehold Spe ties, et rt \RVEO Polishin , cloths offer bi ronts ing’’ and ‘‘Modern Priscilla furnish everyt and ‘ to salesmen. Sample and particulars free 2 Sample free. Gale & ( iluat boc t free Write at Arveo Industries, Box F 147, Grosse Ile, Edinboro St., Boston | Scientif itories, 1919W | Mich nd, Va AGENT Repeaters cost 10 ell 50 List a so pened — r for Agents. New patented | free. Ti Burr, Carthage, Ill ee en ne risa te Hi Is 1 ackare irettes and ,UTO k Z 200 1 vos P ; vn wr . ( ty tor ad — flex ; , w . Mellir uarantee iT lil t A Or Dep 4-1 ' 1 15. ~ 510 Portland A M M oon ap ) ' WE! Y! 1 r Suit and | peri re , N Ove ¢ All M to M 1 W ny Cor f $ oO Free Ga kit Ad ; Mellings ‘ire | 400, ‘ I field Tailors, BD M ikee, Cl Kansas City, M oO ep , Philadel- peed . FURNITURE Refi: B. phia, Pa r Dept : e $750 tart Of ; PHOTO Med $20 ‘ , ar | 1 1457 So. N ' , Yaily Easy wor B Dept. P, 256 W. N h A - quic f ene oT AwrR a el ELL |} sit unnecessary. Gi on noe ; practical n f ‘ Hawt eautiful photo repr ir part t t om | Stretcher Mint trict today. Writ pt Spoons, Forl A 4 CHRISTMAS } Make 5 dd Lower N ike I ite selling every st fies nd home D - tively no mer a. Mine dann hg er $5,000 A YEAR—Selling Perry Photo Me- | Pa Sat Cor lated, 65-C West Van Buren. Chi da ! Big demand Ready ales 400 wanted Dep I profits \ phot pied perfectly delphia = Big Opportur 1 n Me Mi Compacts, Jewelry AGENTS n $10.00 D * t Guaranteed eness l stigate Ir Cr) Water Filter . . oe ’ - S 2 fu jeta nm request Writ I caaat ; yes p 5 # ‘ ) f M rry | Novelty Corp., 179 onde By Paid. Last me -Ave., New York ; ; Write for | sero S , Callous BR FIBRE letacha ted t : aS Sead) “ertal eam | onieh. G profits, rep 1 = y I Ze rial tnt - ‘ > aan Fibre Broon People 147-4 r y Ss \ t The 1 S ear le at ( P - , i. ue = “a * - 3 ( 7 Searle Bidg., Rochester, Ave Brooklyn. N. .¥ wit ‘ r bill 1 . MONOGRAM Automobiles P ¢ tm & » day Territory g IM x \ 1 r—Wonderful inven- ten 1 4 wor every Write mt lint Gordon ( t ’ I ised nn ig laranteed them mil ns without par Se New ¥ , os t ¢ f .) ex wive territory Motorist Accessories C M $15 DAILY easy p New Amer t I re (¢ » 234 West Water, ONE of t geest 1 two tone aviator aty t Rn M 1 € Wi to any addresa for 1 | inz outfit fre if Ww 443 So. Dear- SEND 1 ' n postcard. Free uting Service, Dept. PM, Harr born, Dept. M, Chicas teats ony Salesology Ma ° : PORTRAIT Agents—Writ FORD Gas Saver i 1 vd tin taina l 0 mon . ng opr tunities logue Enlargements, Frame Fits any auto I ' ’ it . Offered ’ j firr no obi tions Sheet Pictures Lun F) Critchlow, G4-805. Wheat Sal y Magazine, Desk B-38, 500 No Adam J. Kroll & Co., 2539 § , I Z : $60-$200 A WEEK G ine Gold let Dearborn, Cl go cr x era store window ede WANT Distributing Agent f j ~A 4 ple L ors Yer " — ' Ss AGENTS make $100 week furnishir powdered nd | >; re ¢ ¢ t er ge ( I } rs to merchant n free adver } ; evhad ustomer agents Metallic Letter C 438-B North tising pla Particulars sent fr write at a ~ . se ‘ 8 S rg Clark. Chicag oe 1 Mi Co Det M M ae l rod 3 » J-2142 Profit ling useful 1 er line for any « f trad ; = A{LL-YEAR-ROUND _ profit 1 f lr i. FREE Sar ] Rain Shi l Winer.’ ing wor t new wat Liberty St.. Ne \ R $ Cost ent Clear ele e . = ind R D No ¢ Ne qui I ! tt . a Attact ) Rub | eld | live prosne ! rofit. J 0 ; am " | { uy. | 4 Exclusive territory. WV ‘ ; ref « le Ne t r tor ple outfits | factory 3. Paty N ‘ Ha i, pi ast Labors Ce 31 Davis Square. S rvil M PATENTS. 1 : in a ng for GOLD Leaf wi 7 letier AGENTS—We start you in bu and ! . pon % ye D ng your experience profit ~ help you st 1. N pital or exper ~ eng Mc dle age lige Ble mg any age ee Consolidated. 69-U West VanB ence needed Spar full time ¥ ; i“ : t fe ma Pog REMNANT Stor sethel, OF earn $ \ ! Writ Mad = : ’ = ‘ Pry Goods Bargains on Earth ‘omp RB vA r] I r } > pro Con N Y pi aaa Ree tor trict lential D ; $31 PROFIT ¢] oO T | 1 ’ nt se Clar € AGENTS Clever I Money—Ea Wor Selling Gold M A OB R t ! Patent Att makes every | four per grams for Autor Lu Wir ‘ B Building (directly acros er; big profit, demand iner Wagor No« N . t t fror Pat t Omics Wa ton wher Ex e territor ff . . a ee snd 1a? free. H. Marui Company, Tr } s Free vu M iH I l New ¥ x ¥ ’ NEW Just invented: Comb faster Any Gl oO I e Sample (¢ RELIABLE People Want place Ex wher Ss ! 0c f 1 value Never ticle perfur nd ecta i tore ur ed l Comb Mfg. ¢ I r_Center, Mint fully profitab La Derma ¢ bY . . wsT oO new rarette ¥ ! P is. M dove Alw f t P " ~ “ sesboesd wit od t most beau ! ’ d DON’T sell for others. Empl fast seller M , 14 t Vend ma mad Pr If M your own prod Ma s ( it Bu to last i A le iH hold Sp t é A ’ f Y } + . fe Ww P ‘ - AGENTS t I La t i M if ed excel by tl ! Valuable | et free v liable li t t t und 1 National Sa M > ¢ Dept N nal Ss ntif I remedie Ind } - 1 } ( Qt St I Pr j Richmond Va pens Prompt tohlict . ¢ 7 SHOP A nte General A nt to ell AGENTS Art ta strv pat Valuab! lit I 11 I Ad new lares ur f Paste Hand Soap—fine Opportunity Illustrated cat Richter ¢ Berry and S. 5th Sts., Bro profits—quick sal fhe Connecticut Can | Plocki Suite 707, 58 East W lyn, N. ¥ Ha

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ressive agents needed to and Force Pumps. Used ! plumbing fixtures. Sizes Readily salable and show tent workers The Hol- W mpetition and offers, at xceptional quality Worth- le men. Alert Products, Holley, N. ¥ Ss plete tire change by Morey Quick Action Rim y, 49 three days, cleared Mont sold 100 in 14 iils for good territory Har- M. Morey Rim Tool, Buffalo, Diamond Riva Discovered! white Rajah Gem astounds leceives experts Beauti- ef $100 weekly Quick! 1 ¢ Dept. F20, Salisbury, kwear; wonderf proposi- 8-M Broadway. New~ York Easy I start you in auto no investment no ex- Landin 1206 Montrose Polishing Mitter Brush- troad, Lynn, Mass Fast Sal Every owner for his aute ou charge Ten orders a day easy Ss and fr sample De} A Kast t r Emy agents ur wr t t Toile 1 Sy t 00% veryt t I how you let free Writ once ntif Labor ri 1919W Va r Free T sdlvertise All Tir 1 xly ¢ ft ller s 1 10 al increase ar The can rar i to never n s Demand Metallic Letter Owr Products 1 Processes, $ Cata orcu- , Wa ton, D.C . } ikerchief nr ’ Earn ' gy ol ¢ Importing 0 distribu mpl puzzles s evening Catalogue rT Puzzle I v, Ma rful Hand A Machine Retail $4 I'yt ter Hersch Bld Pittsby S—Full line € Also hirt Or fre Com- with bonu H » Rair a endence Dept | ( 1g EEKLY. Sell nat ally known ppoint agents N-R-G ¢ perior Chica CLEARED in lays by one Amazing Cleane Company 1y tr iC y a t T r. Sample Free 4317 Irving G make candy I ! mI y A Sparkling Cheekerboards Free bk. Pals SOMETHING buyer of our Wenderlamp; demonstrate necessary ; $5.0 BUSINESS Glass of Your Own — Making Name and Number Plates Signs sig Book and Sampie ner. 512 Wooster, Ohi ; New Every motorist 4 electro-magnetic-emergency takes only one minute to and make a sale; no experience 0 an hour easily made; full Won time or evenings Write for ample derlamp Co., 926 Fisk Bidg., Dept. 10-A New York CALIFORNIA perfumed beaas selling like hot cakes Agents coining money Big profits Catalog free Mission Fac- tory P, 2328 W Pico, Los Angeles, Calif HIGH-GRADE SALESMEN WANTED SALESMEN—Manufacturer of established line guaranteed tools offer profitabl eor nection to men with mechanic and some sales ability part-time men onsi red twe average sale daily net 1) weekly advance against commission Write for fr catalogue and money-making plan 1. G Woods, In Dept 112, 7 W 20th St New Yor N BIG Season Just Ahead Advertisir et cils* most popular every day—every busines prospect Our line repeats B om - sions. Established in 1902. North Americar Pencil Works, 126 So. Clinton, Dept. 55¥F, Chicago MEN—Sell dependable shrubbery trees, etc tea demand Com operation Cor issio paid weekly del r and collect Write Perry Nurser Dept. R-12, Rochester, DON’T sell for others Empl agents yourself Make your own product | t Articles, Household Spe Itie ets profit We furnish everything and show you how Valuable bx free Writ at once National Scientifi aboratoris i919 W Broad. Richmond WALKER Made $ ”) | Da sell ing Collection System to Doe ind Mer- | $6.50 Collects $65.00 ‘ nts Retai Costs $1.50 Adjustment Ala LIVE Salesmen can easily make $ r $20.00 a day selling Utility Stools dir the home. 200% prof Send for fu formation todav If 1 Vv send 1 order of fifty cents we i! nd you stool If you a not t with it ’ value retu t s ur exper I $s i not an ordinary fTer ’ il por tunity Nappar Lbr. & Mf Co Nat pane Ind EASY to sell ¢ i { t sumers from samy B nee Liberal credit \ I f Cary | or experier unnecessar I r & Browne K-1500 8 State C EARN $20 a Day Estat h income for life selling for $1 y $1 50 accident policy. Write W. C. Stor ll So. LaSa Chi go PUNCHBOARD Salesmet Amazing new line worth $100 up weekly—Boards. Vend ing Machines wa Novelty ¢ Dept. 18, Cedar Rapids, Iowa SALESMAN—Callir on the rad track to sell Orthocone speakers—natior ly ned for their wonderful tonal qualitic w price liberal i int t lealer B 5 1 I 1 mor Sample fur Ref Writ 1 to r ¢ 728 8 G g i IR co Outfit ( E I Indiar preve! t fr mbir 1 aut cleaner r nter leaner. Hand fre I l profit Mickma ‘ St. Paul, MAKE $ 00 daily se ik coats and Slickers; Red, BI) G $2.9 Hat Free Comr fi f Ellic ABI2-S tt Dept Chicas SALESMEN lust t $8.88 for f 3 suit commission $ ) ivance free selling kit The 888 Cor r De] 121 K. Ft. Wayn Ir MR. BRUSH Salesmen—oO Establ i jew York Brush Manufact r juit ger ¢ s y al) ft t ‘ 1 their extensive lit Cestenedl in Wire Brush “A lar enmmie ion thar ur other B Hi in th eountry Write imr iately for Drom. tion Wire Grip Sanitary Rru Corpora tion, 15 Mercer Street, New York POPULAR MECHANICS ADVERTISING SECTION NO high-pressure 57 salesmanship necessary selling Luminate, our Magic Electric Win- dow and Outdoor Salesman Demand estab lished. Color, light, motion gets ‘em - est quick-change letter system and y two-color posters land orders on demonstra tion Hustlers collecting $100 weekly, easy Protected territory Display Produ Co., A407-9 East Ist S Kansas City, Mo WONDERFUL Inver Seals Fifty Er Velojes minute Sells on sight at $3.50 Exclusive territory Kendall Sealer Co., [20 Kast Jaffrey N iH SELL Collection Comi to 1 har manufa t professional The get tl mor r profits Sampl assortment ‘ ( tion Comics i8 n Cortland Pa Ave., Yonkers, N. Y¥ NEW Inventior bi shutter R tails $1.50 Real winter 1 I tior Mak $150 weekly ea Jones 804 WN ( ' Chicago AMAZING Invention 1 ager $150 weekly Unique cor natior ear shift ba ash tra 2 prof Lif , rante Free particular Fisher, 7 Ss Chi ) Ave Chiag REPRESENT Auto Seat Cover Manufac- turer Make $12 weekly B est cor mission paid da Low ' Hi - est ty Elaborate outfit I Mar- vel Sout Pau ( ig TO Marke A garage door t ie imple ’ ion ickly i led, i , attract ra wner bui ! Write f xclusive tert r it Knowls Steve n ¢ l 8 Pa rd, Ann Arbor, Micl EARN $10 daily silveri rrors, plati refinishing ware le lie , lights, bedstea E. Decie I rat 225 Varick St New Y SALESMEN Your business $1 Yearly Other Am t I t t (; t i steady wal $ Der ted I Depart t I rsal Px Dept Clinton St.. Newar PUNCHBOARD Salesmen—mak wns One a ad I you weeh Full mn n on repea Sales ( " Rave Ww 1A «} try Sale en ( Sell The M everywhere e nechboards Someor them, why not you? Collect big « r daily Newest argest elaborate « ent upon re est Li In Sales ¢ Clinton. Chiea Dent. 1D $ x A WEEK Ger G ters for store windows T ly a samples Liberal offer to ger Metallic Letter Co 438-A Nort Chicago SEND name 1 re I teard iene oes Sal. M ntains 1,000 1 mab ! rt Offered by big reliable firms: no ot Salesology Magazi Desk B-39 { Dearborr Chica DOUBI Spar Plu I'w par geer. hot , er curt ron ' Guaranteed to t an other r ref ! n Y 4 3 i line t Spark Pl ( Neh M from the D ( $1 I I vy Storekeerm w lerf M ( tier H r ‘ GOLD Leaf window letter and Samples free Consolidate 69-V Va Rurer Chica PUNCHBOARD Salesmen. 2 hour $100 ever ‘ New | I Full j repe t log free. Puritan N ( n. ( ' MAKE M r ‘ xel f engrave xX I mmissior Art Cr I D C. 117 N. We oO SHOP Repre e § R M ¢ to frier I Reed Sma T Wort H W M SALESMEN Ss mer Ray Sw Jacquard tie new startling fea c — , Wonder outfit: fre t Ss e Mi 2 i—83rd St I

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POPULAR MECHANICS ADVERTISING SECTION ay ELING wanted by Year sig commi al and well Sale HBOARD natir + ange all s stationery full time u ice Minneapolis Minn FOUR $7.50 sales $20.00 daily : Ave Ag HELP WANTED is your § easy time Time, 1 Hos pare Full Ceuarant MAKE ats and Hat w dollars inv vi re Drawer . 1 MR. MAN! niture Radi Full-time EK uable forma WwW Ex WANTED CASH Paid for Sinclair Display A MAILING LISTS 99° JARANTEED Mailing curate ay liable Guaranteed that produces business; comy possible business or every kind of any business or individuals compiled for your individual needs any where. Catalog { information on request National List Broad, Newarl N. J “500 NAMES rural families: first time offered, $1.00 frame, Rockland, Ohio 1,000, 1927 WOMEN’S 1 $1.00 W. Sheasgreen, PM1427 North Mir neapol Mint CIRCULAR MAILING Butt vertisemer lists d The kind led for every individual Lists of imes WE seekers spare -time theusand ing Bureau, BUSINESS SERVICE mail Forre EXECT fon TIVES! Proven busines Assure fewer leak otits $1.00 Standard Cost Penn, Minneapolis, Min INCORPORATE Low cost Cha t New Martinsville, W Va PM1427 INFORMATION These practical _ RE PRESENTATION in Anytl ng Washingt Anytime nformat Victor Bidg 0 Heirs’’—A 92 imes for lost heirs rent parts of the England, Ireland ts included Price ational Claim Agency, sburgh, Pa., I Ss. A Labor and Money who own, drive or repair autos. kinks are based upon the actual experiences of hundreds of owners und repairmen Three books, Auto Owners’, Auto Kepairman’s and Auto Tourists’ Hand books, regular $1.50 value will be supplied at 98e plus the postage C. O. D. for a limited time only Send your order today to Popular Mechanics Press, Room 912, 200 E. Ontario St., Chicago CARBURETOR Supplement to Auto Encyclopedia—Just Out—Deals every make of carburetor Just what 1uto man has long been in 106 p , 246 illus. Price $2.00 your copy today ¢c. 0. D. if you Popular Mechanics Press, Room 912, Omtario st., { i 1 ’ TYPEWRITERS AND SUPPLIES UNDERWOOD = Typewriter wn Easy monthly payments sy than manufacturers, 10 Rebuilt, all worn parts like a new machine 5-year Write for a big free catalo n-Ward Mfg. Co., 1519 Shipn » Ill SIMPLEX oes oo catalog ve Pro RI TYPEWRITERS All Fully Typewrit Intern Pitt Saving is for all Dyke's with service Typewriters $ Demeo TYPEWRITERS Rent Rebuilt Underwo montl If you pay its ve machine free Part irch Typewrite E Bldg Pittsburgh, Pa TYP EWRITERS, all standard mal $10 F guaranteed Free trial Write plete illustrated lists North- Typewriter Exchange, 121 N. Fran- Ave Chics TYPEWRITERS, Radi Motor to $45 Kni 12 Lecust, St. Loui M PRINTING, wae yt ht NG AND MULTI- PHING Neargravuremboso tationery, if particu- Sollidays, Knox, Ind ARS %x6, $2.50; x9 Ider $5.25 thousand Andrews, 1, Fargo, N. Dak 000 LETTERHEADS Publications NI ARGRAVT RE” Litogravure’’ printed ir. Sample tamp CIRCUL $1.00: $10.00 catalogs big e Printing Company, Annville BOND Letterheads 250 envel lelivered Satisfaction guarantee Harrigan, Kalamazoo, Mich LOTS 3%x6 folders, $13.75: en slips, $5 00: 5% »x8% circulars, $10.00 Samples free Chri tmas ecards, colored em bossed designs, paneled, name engraved tyle, 10, $1.00. Good’s Printery, Harrison } rg Va GOOD Printing pays full ized letterheads rinted $1.25 postpaid: 500 Write copy plainly. Samples Wytheville. Va 00 HIGH-GRADB $ 100 bond envelopes, 100 paper, neatly each $4.00 Peerless Press, sond Letterheads, other printings Toledo Printing Co., Philadelphia, Pa 100 PERSONAL Cards Printed le Stanley Ladage, Camden, N 12 CHRISTMAS Greeting Card I your name ’ Americar Printery Barre Pa ntir 100 6x7 velor 00 nie $ De i: t Street Ripr Krafts, An Aller LARS, 5,000—5%x8 $14 All 1 Garrison P CIRCT 1-page folders Samples . n 0. WATERMARKED lett 1ds or billheads $1.90, 1] . Gilmer, Texas L TIGRAP. HED Letter Samples Profit, Box Tenn LETTERHEADS postpaid c lale, S. C MULTIGRAPHING ence, two dollars letterheads, four printing. Mayera ill 250 heads, ¢ Leonia. ! QUALITY Printing! Send for Free prices Folders specialty Earnest Fantus, born, Chicago PRINTED Christmas Press 722 and ymmercial busines thousand dollar Corporation, BOND Letterheads, ‘ards, $1.35 N. J Enve each Ecor Rea Standardized Circulars Personal *resents Samp Clifton Ave., Newark WHITE _ envelopes $8.85 Letterhead Printery, Lesu Stationery Spors DELIVERED, rheads 8'xll asl ‘atalog free National Printing, Goshe PUBLISH Your Own Mag Orgar Our standardized fifth ordinary prices Sample lars free Evans Printing Cor Rapids, Mi DISTING tionery that terheads r Moulton Sth Artistic Susi Confidence l $3.00 TIVE Creates Envelopes Printing Company, Kansas City. Mo print Stationery, ulars imples via, Ohio MMED la BOND Letterhead printed to order ard 3 J. F St New PRINTING t Fine wor Gettyst ETTERHEADS and postpaid Oberman (¢ PRINTING, OUTFITS AND SUPPLI PRINTING Presses, tam Bargains. Nort? Ro aes, Chicago PRINTING Outfits plies, type noveltie logue. Model Press, PRINT Your Own Stationery bookplate, Christmas cards, cir pamphle ts, ete complete out larger, $11, $29 rotary $149 others Easy and interesting Write for catalogue presse etc. Kelsey Company, K-11, type Geo York, Penna ty Meri GUMMED LABELS 1,000 dress, 50c PRINTED; JIBS Co., Name, Bu Box 93, Holy RUBBER STAMPS RUBBER stamps!!! Name, lines 35¢:; I5e additional line ervice. Mid-West Stamp Wor Til RUBBER Stam, titcnal lines 10c Auburn, Neb ILLINOIS Rubber Stamp W facturers Send for e Rockwell St., Chicago First lir fewman & S ircular DUPLICATORS AND DEVICE STENCIL 100, $3 Duplicator $2.00 50, $4.00 Returnah! ‘ircular i Prin Sy) ilty ¢ Pa

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POPULAR plicating copies of machine (Postcard postcards, blot- with or without illustra- Simple, speedy, guaranteed. Send for literature and ac- rinting Complete outtit Manufacturing Company, Pas- 50 to 100 copies of a at a cost of three cents ty Duplicator. Write for rhe Heyer Duplicator Co., vd., Chicago, Ill ADDING MACHINES Adding Machine. absolutely ac- $999,999.99 Fully guar- eased users. Makes add- quick liminates mis- Postpa $3.50 Bas- lywood Ave Chicago. Automatic multiplies FOR SMOKERS r acco guarar 5 pounds, $1; i 75e; 0 25 nd > $1.25 Pay Farmers Union, Mayfield, tleaf Smoking, ntucky Farm- FOR THE HOME AL New Finish gives ali the nd weatherproofness of Val- n ¢ ! In addition, amazing! Ideal surfaces where desired. about your beautific and be Try acquer nutes later. stating India 1, Italian Blue, Jon Red, Oriental Blue White and any, Dept. 4, 456 Fourth FF Make $ Ar yur at special j lonial big iand no npetition craft in ) mir l ns at lowest As - You - Weave Free om Book today 480 Factory St Boon- tore c« new leak Sen 25c for Stop-Leak Canteer il Co., R East St. Louis, Ill Works $5.90 free; make Clock cases Ruff- ’ t dilator Clock Instructions friend or new Clock Co., \THER’S wn Colonia hades Se f f $¢ $ Milwaukee, Wisc ard $2.00. Instruc- Train Cleve Ave., Don’t be afraid to pular Mech rio St.. Ch ind How to Mend how to repair alm r needed about illustrations; forr Send no money J Make and How to fer and $1.00 908, 200 I postal charges Pre Room Ill 1” Popu Ontario MECHANICS ADVERTISING SECTION THIS is the season for making about the home. Easily done with instru tions in our new book Tells exactiy how to use tools, sharpen tools and cutlery, repair furniture and cabinets, upholster, work metal solder, work glass, paint, stain varnish, hang paper, repair plumbing, furnace trical equipment, shoes, harness, gloves and concrete work Send no money Just write and ask for “‘The Practical Book of Home Repairs." When postman hands you the book, pay him $2.50 and the postal charges Popular Mechanics Press, Room 908, 200 E Ontario St., Chicago, Ill RAZORS AND BLADES WE Hollow repairs elec- grind and reconditio Razor Blades like new 12 dozen $1.00. Wm. LBetken, Ave., Chicago, Ill FREE— 10,000 hollow-ground blades give away. Clean and save your blades, we buy and recondition blades, manufacturir om - mercial sharpening machines Velvet Edger, 6001 Gramercy, Los lif GILLETTE Style new Dozen 38 cents; lace Kutz, 132 N ot 4U0C 7740 les, Ca des Guaranteed dozen $1.00. Wal- Chambers, Phillipsburg, PY . FO® MEN 59 INDIAN eagle feather war bonnets only $10.00. Indian silver bracelets $5.00. (Send 25c for arrow head, foreign coin and cata- lugue. ) aft P. Company, 466 Con- necticut, Buffalo, N. Y FOR Dens Relics and me Europe’s Battlefields Illustrated 2o¢ nternatio > Albany l Y lals from catalogue, Avenue, Indian arrowheads from tpaid H Daniel, La- xe new list Indian relics, F . tllis, Webster INDIAN Stone re 3 her Mukwonag Wis PHONOGRAPHS AND RECORDS Catalog 2c. Grut UILD Your own phonograph instructions build new ed for American Phon 41 West 24th Place, Chicago RECORDS, latest each Write for Phonograph Company New York, N. Y selections rt catalogue Pleasing 204 East 113th MUSIC AND MUSICAL INSTRUMENTS DO you like to make thi should have a copy of I new book entitled ‘“Make large book of 480-pages make 900 different artic tions Price $3 postpaid tion will be sent upon Mechanics Press, Room St, Chicago, Ill YOU Need a better grip on Tell us to send you a copy of ‘‘) for the Practical Man,’’ only common sense methods it removes the mystery and difficulties so algebra and calculus are made simple Assuming your knowledge. is limited to arithmetic you quickly and easily gain a working knowledge of algebra, etry, trigonometry and calculus postman when he hands you the pack- Address Popular Mechanics Press, Room 908, 200 E. Ontario St., Chicago, Il BOATS AND LAUNCHES BUILD Your Own Down ready cut board motor sail, or row Send 25« Boat Co Inc., Rust Side, Mich HUBBELL Marine Coolers engines into marine motors Booklet fr Ford speedboat, built, large blue- print and directions one dollar. C. CC. Hub- bell. Perry Ave Norwalk, Conn PROPELLERS etc.; also used equipment Wm Baker b 823 A full request 912, 200 E. Ontar mathemati geom- Simply Boat using our Knock- mater : 55 models, out- runabouts, cruisers, for catalog Brooks Ave., Saginaw West speedste onvert Ford ly easily Stuffing DOXEeS, bought, telling how to make 21 Also many other helpful Profusely illustrated With this we include the big book, ‘‘Out- door Sports the Year Round.’’ for making all sorts of devices recreation Send no m the postman $1.98 p ostas b are delivered Popula ianics Pre Room 908, Popular Mechani ii ng, Chi- cago, Ill SHIP Models Boat Book f boats on boating Worth while Easy to make. Decorative Ships Picturesque Barbary Pirate Felucca and Beautiful Spanish Treas- ure Galleon (both 17th century) Instructions so simplified ? make these tools almost knowledge required "av p is delivered P 908 200 EF Ontar WATCH REPAIRING New c tman $2.50 7 “ lar Mect St ‘ “WOODWIND” Clarinet and Saxoptl Steel lx Mout ect ing Aust ~ MAKING Bedford, Mas “LIKENI SONGWRITERS Preliminary- Publ Dept. L-1658 Broadway SONG-POEM Writer 6 WwW t Dept SONG P writer : Ca VIOLINS credit } Get detail Ga rad St MI Wis I WANT Song 3544 N Racine SHEET-MUSIt teur Teacher or Ferd. Zar P WRITE 8 tion Writ Pub. ( CORN PTI! ing ti ALL perts Box makes of Watche Write International Watch Service, 5P. Fordham Station, New York ANTIQUES, WAR RELICS AND INDIAN GOODS Money lin repaired by erx- OLD n Kendall O'Brien Security street fr Cc Ree pag PATENTS Miller, R Patent Office Washington

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60 POPULAR PATENTS Procurt scenal, careful and « references. Maslerate actual » Master ‘ al Bildg., Washington BROCHURE ‘How ree Send rough tion Prompt, L. Applebaum, Register 41 Park Row, New E i J DXar er U. S. Pate to INVENTORS hi Write for Booklet Plan for handling how to sell and at lowest Rz yer, Jenifer Bidg., MILLIONS Hundreds now I Washington, ost for yours spent annually wanted! Patent i profit! Write today for free book—tells how to protect yourself, how to invent, ideas wanted,, how we help you sell, etc American Industries 500-Victor Bidg., Washington, D nc., Cc MECHANICS ADVERTISING PATENTS—Write for How To Obtain A Paten r Invention Blank Send model « nventions for Inspection and bree Terms Reasonat ible I mt 159 our in nt « Age Victor J + Ninth, Washington ; INVENTORS advice and exact cos patent our Free book i tain a Patent.’’ Tells what every invengor should know Es- tablished twenty-eight years Highest refer- es Prompt service Reasonable charges ndlee & Chandlee, 414 Seventh, Wash- n pD 4 Milo D. Stevens Free Booklet ents, Trade- Copyrights Offices Mona: tnock I . Chicago; Barrister Building, Wash- ington, D. C. LACEY'S free See _ESTABLISHED 1864 Patent Valuable book add page Sense 160

FOR INVENTORS

INVENTORS—Write for our Guide Book *‘How to Get Your Patent’’ and Evidence of Invention Blank Send model or sketch of your invention for our prompt examination and instructions free. Randolph & Co., Dept 430, Washington, D. C PATENTS liable tioner Trade-marks, Copyrights services by an experienced devoting personal case Inquiries invited nished B. P. Fishbu 525-A McGill Bldg V Booklet results Promptne 21 or drawing for Watson E cr 4 Ninth S Wasl PATENTS Tt h for free Garrick B “INVENTORS’ > this book nted inventi formati inal mann, re assured ex- G impr tered Bldg n or 41-R aving and alif rnia I ng booklet PERCY 8S. WEBSTER, 203 8 Loan Building, Stockton, C established organizati free LANCASTER and Bidg., Washington the Form fore Booklet Albert Bldg., Washington, D. C PATENTS, Trade-Marks firm has 27 years’ experience and gives pert personal service at rea able rate properly protect your inver n Write for free information and exact st of procuring patent before proceeding John B. Thomas & Co., 902 F St.. N W.. Washineton. D C UNPATENTED Re Sold I tell you how and help you make the sale Free particulars (Copyrighted) Write W T. Greene, 806 Jenifer Building Wsahing- Designs Ideas Can

ton, D. C. you have to patent you y to Munn & C best way of sketche a des operatior All confidential sent on bur methods, terms, Trade Marks Scientific PATENTS free of interest of recently Company, *ientific Americar York City Washington Chicago, Ill Francisco, Calif.; Los Angeles, Calif PATENTS—Write to B. P South Carolinean) Lawyer, 525-E McGill dD. € tors 7% of Building, 4 dD. ¢ Fishburne (a Registered Patent Bldg., Washington, PATENTS nt Plan obtained Write tered ington orerative rs Ww 950 under for particula tegistere *atent Lawyer, Bldg Was! ; “ure rade r} ecis- . ‘oe gladly vithout charge Booklet of in- idea free )-Owen 41-R Park and form Richar Ower ngt or 3} gton York Universal Educator — con- ) lanical movements ) per- ions Tells how to obtain and Suggests new ideas Explains t your attorney and avoid patent Price (revised edition) $1.00 post- Albert E. Dieterich, 621-Ouray Bidg., Washington, D. C GET your own complete instructions Campbell, Calif INVENTIONS rket blanks Sons, Legal Cutting patents. $1. Des American AM and m od inventions ror, Me 4 _ PATENTS wanted by manufacturers. § ription, Box 126, Dowagiac, Mich INVENTORS Wishing t nmer i nts safely should Service hundreds anufacturers who Write Hartl in touch with Rochester, INVENTIONS Developed — Your ideas developed into practical form for your patent application Model no necessary Send rou sketch and description for esti- mate of cost and advice. 27 years’ experi- ence. Albert E. Dietrich, Engineer and Registered Patent Attorney, 621% Ouray ng. Washington, D. C You ha a patented article of 1 urnish ¢ al for manufacturing Har Milwaukee Athi cee, V Ave., crude erit Write Club, ipit nd, Vis etic it

SECTION ‘“ounts delay *rompt. car O'Brien, Security Bank street from Patent Offi ~ ¢ See pages 156 an INVENTORS—Write f ‘“‘How To Obtain A Pate Invention Blank Send inventions for Inspe ree Terms Reasonabl pa 159 Vi nth shington, I gistered Building tior ion W a NVATENTED tell you how and ree part T. Greene ton, D. C WE Will buy Martin Laboratories INVENTIONS Have here a lor winding (Copyri Jenifer 1 suildir in 2 and LE ht

PATENTS FOR SALE

or el ma fac “as, B x FOR SALE and $100,000 ful im - 14 on vement 1 540. Rodney ’ Bee Publishir UNITED STATES Pat Means for utilizing P Device for runr or Royal shield ar hade tl ally when d and manufa Killiy PATENT—Fortune nal Aut visible al royalty. F. Cox Ru HOUSEHOLD home a _ prospect St., North d INVENTIONS and Pa der vy inventio Pr marks from Hip M hure. Pa NEW Tool h for metal working leading manufart Co., 811 E i t OUTRIGHT—tmpr with lead di money 1 Park Ave WHY let your patents two million five hundrec about it! The majority especially interested in ventions Ask me to tell ventors successfully sold L. Rund, Mer lar Mechanics Magazine, ors are ¢ tured at v pene Stoke on art Jergen ur Pr r 1 New Y rk we thig., Ast TRIGHT Or Rovalts at wor d. 8s ry 1 ria in Stop-Dir 1 arour sh St tents atents ce ‘der for plar yY and retatahble ster iker Ss. Cc. C aldara, ( lie idle? 1 thousar of rr new idea vou how their pat Chicago Classified Advertising

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POPULAR dknitting machine outright or an. har automatic n, Saskatoon, Sash., Ca for ELECTRICAL \NS And Helper Ar House Wirin new book of rations re] a compact ine blueprints ystal Ss AND MODEL SUPPLIES Boiler al lel Making ines, il Bathe Av N Modelmakers. B Dead- ae : ir Stamp 7 cir Toronto, 14 Butterworth r Ship M tte line of Be luding Bos Architecture. er Tools, Dies and G MECHANICS ADVERTISING at low- Works, MODEL est cost. 115 So SHIP model plans tings Interesting cata 6c. Sea Arts Guild, 730 Milwaukee, Wis PATENTS. Tin patents Don’t ri deas. Send sket for Experimental Work Model & Machine Street, Chicago and agar Clinton ies, ooks, fit of Sea Thir Win: ebago sup} M, your ‘How to Invention on hov ctly instru Obtain ¢ of working models, uy Modelmaker, 122 erty , New MODEL stear s and boiler fittir tamp for catalog Refundec rder. Model Machine Shop, 21 ‘ » St., Rahway, N. J. FUN making Four large profuse- illustrated how to-m st e i boat to a > engine ir if write Mechani $7 and postage ither Book 1, Book Popular Mechar Ontario St., ( ilers. Boat ly ike alme sail toy mot MANUFACTURING *"LETE and Mar Specia Stree Pittst SPECIAL ols metal fears, stock Send for C Works, Tinl PATTERNS and di Bra easting “ & rk P WANTED to 1 —some mect i Vv ‘ ‘ o.. Yor , WANTED, t 1 Ma r 1 k NTIONS « r 1 ready f INV} 1 pack I SECTION Cylinder Grin Boring Machine Heald linder ~ Milling Mil 1 Si innati ART > oe Distributing OTHERS hs chinery thr Ask me for pr L Classified dvertising, I Magazine CONCRI fold Rund, Mar *opular Me ck Ma Cata ret oncret ,5N WOODWORKERS r 1 t Ww Ma ENGINES, MOTORS AND DYNAMOS A. « WASHING Machine Satisfaction Guar | \\ I STEAM Et ' _ MAK ywer ¢ M GOVERNORS f 1 for ‘ I cC-S G M T Landor WRITE f } ‘ MOTORS Sing BENDING MACHINES MACH'NERY, TOOLS AND WANTED—Y surplus stor St Ch TOOL Boxe Ur Machine Co., can » In

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POPULAR MECHANICS ADVERTISING SECTION SALE—MISCELLANEOUS DOGS AND PETS MISCELLANEOUS YY ‘ l } ASS r ‘ . eee ree am tow ey FLYING Soauir rr ‘ 1) r St I One ADDRESSOGRAPHS er Folders ywhere Spe Multigray Envelope eale Dupli rs g irti s than half price iaranteed Pruitt roadway, Denver, 17 No. Market, Ct ST. BERNARDS tered prizewinnit : brit Plate DYKE’S Automobi a. RYST AL th edition Infor . r i y. i g W ann, 14 ng every part ill tor rs. \ casonabdl a i *hot ( tr it HOMEOPATHI nd troublk t s u nt venue treal t ‘ nt 1 tr J Pay postm I Mechar g I l ‘ P t St r " a “oo : 7— : - tablished 1 : ; 1 RADIO “trouble oting,’’ 30 easily a joratory, purposes. — j \ WEEDS—Cut them with followed directior truct test- — ns Shaw Garden Tractor Al a oo é ates and runs belt machiner I eS vag de os Saylesvi Immediate delivery Shaw M a“ ae bs ;' ~# +5 UL = Terri ! any. Department ¢ Gale rs ad : . ~! . Shepl - ar r, hr TS anybody can make will be y postmat Salk ; ol ecg $1 Specimens e and po whet » delive me ; gor int Day, Windfall ilar Me ur " Room 912, rio St Chica [il WANTED—MISCELLANEOUS MAIL u u 3 1 Jewelry, and HUNDRED Hunt mpt L pl Cat g K fused I States Smelting Ill ‘(The Old I RABBITS gy A gg AE pe Be page MAKE big profits ' ; : . t Real Money 2 Conrad’s Rat COMMERCIAL ade a profitab!l P BARGAIN innati, Ohio SEVEN -ROOM LCTe lot ut yuickly where located Don’t f 1 Particulars free en C Desk B *LCAN-Orange-Fig Monthly quick M I TOBACCO Biloxi is pay. $1.50 if « OZARKS r supe and propose Alvin Zimr City. Kar rite e, W SEEDS, PLANTS, TREES, ETC MEXICAN Made nl than - i. rex IRMUL ide AS as , , : , oe . . ‘Its list, free t , old ; 4s . ; : , i, person Bldg., Houston, Te - TELL an army of 3,000,00 about your offer! If you |} : ly or exchange, yable propo y ut it ROOTS AND HERBS 12th St Cl HERB Doctor Book pts 9” making herb npany 5 lyn, N. Y, sox 1, Vande

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POPULAR MECHANICS ADVERTISING SECTION Everybody Needs fs.) Ap this

~~! / = MIRACLE INVENTION! «. | initractor ADDING MACHINE: ... Does all the work of bulky $300 machines, yet costs only rtling invention worth twenty t to everybody who works \ new kind of adding ma- 1 the ADDOMETER, that’s ler! A thoroughly practical t machine that does every kind and with perfect ac- at a price of only $10! A real honest-to-goodness add- capable of doing all the work expensive $300 tno more than the swiltiv works entirely without the use of keys or awkward levers. Yet it is lightning fast and never makes a mistake. Shows the total ible at all times. Clears by a flick of the finger. Every action is simple—direct— positive But that’s not all! ADDOMETER is also radically new and different in design It is made entirely of metal—and guaranteed for 2 years! Embodies a host of features that have long baffled the best mechanical de- signers. Only 1144” long, 244” wide, and %” thick, and weighing but 14 oz., it can be carried anywhere right in

“1 fountain pen! almost im- sut it's not—it's a 1 we're ready to sending you @ REE for 10 days’ it the payment of eems A Mechanical Marvel tedly the most ingen- ntion in 25 years. IE TER is much more in adding machine. ) clear up to ' quick as a BTRACTS instantly in ime speed, agility f operation as it ator to

AMAZING TEST ed, in a recent demon- stration an perienced boy totaled 22 items on the ADDOMETER im 29 seconds. it required 28 seconds for an expert oper- get same answer on a $350 electric add- machine! THAT'S SPEED! your coat pocket—the only adding machine made that reall “goes to the work Being flat, it fits right over the sheet of figures being comput- keeping your place, pre- venting troublesome eye- strain, and speeding up your work And the upper edge of inex- the machine is cleverly formed into a handy graduated rule A Machine Everybody Needs ADDOMETER useful practical service in the daily life of al- most every Does all your figuring for you quickly and accurately liminates mental strain, prevents cost- performs a necessary the body

nm adds and sub- ACTIONS in units ! And it MULTIPLIES and ist as easil and quickly as costly machines! You can use olces, take inventory, balance unt figure discounts or perform useful everyday computations TER always gives you the right ( time—in a jiffy! Operates on New Principle ry in principle a rER has e neatest, ‘ ] well as in price, been acclaimed by ex- most compact and re iding machine ever invented. It I< The Addometer Company is. w. ort? Washington St. ly errors saves you time in money every hour f the day Even if it sold for $100 or more you shouldn't be without it! At only $10 you

SALESMEN— A WONDER! ADDOMETER is the biggest selling sensation in years! Sells on sight to everyone who uses figures! Every territo-yv jammed with buyers! Write TODAY for details of our as- tounding Money Making Plan whereby you can easily make profits of $15 te S45 A DAY!

Chicago, Il. couldn't buy any- thing that would be such a handy helper. Yet that's all ADDOMETER COMPLETE cost and you don't pay a single until you've 1 a chance to use it for 10 days! avs’ FREE TRIAL! DAYS’ ADDOMETER We want you to have an for 10 day FREE TRIAL in ir home or office » we are offering it to ar ne on No Risk"’ Plan. ask NO money in advance NOTHING on deliver NO deposit of any kind Simply fill out and mail the coupon and we'll send you ichine postpaid Ir i rest it! Use it for 10 ! rhen if satisfied, remit only S10 in full payment. Otherwise return the machine That's all we ask 3 ll means mail the coupon for your machine NOW rODAY! Owr Plam PUP THE ADDOMETER CO., Dept. 49, Div. Reliable dding Machine rp.) 184 W. Washington St., Chicago, til. ‘ ! ADDO- Gentlemen: Pilcase set od rRIAL on dn METER for FREI your special “*! ’ Plan Addres Clip and mail this coupon NOW. Please accompany coupon with your business card or tetterhead, or give mame of one reference. This is im- portant. THANK YOU! P. M. 12-27)

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POPULAR MECHANICS anything if I could ox play something” Hiow often have you said it? How often have you found yourself sitting heavy-hearted, blue—on the edge of the crowd—disturbed ir awkwardness? » joining the New York Academy of Music—before master- ing the world’s most popular instrument, the Tenor B: ‘ most of our students were in exactly that position. Most of them were definitely lacking that finest of all social assets, the ability to “play omething.”’ Most of them, before joining us, had never, touched a string never read a single note. But look! Reports like these are typic Alfred Biron, Manchester, N. H., wrote My Tenor Banjo ifely just a few days ago and I can already play a few tune Leon G. Sessons, Lumbertown, N. ¢ wrote When I receiv my first lesson, I did not know one note from anothe but in short while I could play very well Now every night I h mewhere to go and best of alll g l 3 ery I I play.”’ The Best Instrument of All to Learn— And the Best Way to Learn It No other instrument is so handy to use ulaptable and » un y popular ;¢ Banjo. It’s the ideal inst r the average t And the best place to! trvely matey ' All About The Play-Way ¢ Tenor Ba tr = Aa Read rey Why Others Are So Successful A. F. Bioch, President, New York Academy of Music, Studio 112, 100 Fifth Ave., New York City. Send FREE Book telling how master the Tenor Banjo at to three months A Tenor Banjo outfi phonograph reco derstand. Name Address ADVERTISING SECTION “T would not part with it for*10,000” So writes an enthusiastic, grateful cus- tomer. In like manner testify over 100,000 people who have worn it. The Natural Body Brace Comfortable and Easyto Wear Overcomes Weakness and Organic Ailments of women and men. Develops erect, graceful figure, brings rest- ful relief, comfort, health and strength. Not Sold in Stores— Made to Measure—Makes work easy and walk. ing a pleasure; replaces and supports misplaced in- ternal organs; reduces enlarged abdomen; straight- ens and strengthens the back; corrects stooping shoulders; develops lungs, chest and bust; relieves ackache, curvatures, nervousness, ruptures, con- stipation. = Write today for illus- Get Well—Stay Well Writs ‘c2sy, £0" ites. urement blank, etc., and read our very liberal proposition. HOW ARD C. RASH, Pres., Natural Body Brace Co. 223 Rash Building + -« SALINA, KANSAS ‘NO JOKE TO BE DEAF — EVERY DEAF PERSON KNOWS THAT I make myself hear, after being deaf for 25 years, with these Artificial Ear Drums. I wear them day and night. They stop head noises and ringing ears. They are perfectly comfortable. No one ) sees them. Write me and I will tell / youatruestory.how Igotdeafand #) how I make you hear. Address pedicated GEO. P. WAY, Artificial Ear Drum Co. (inc. 80 Hoffman Bidg., 2539 Woodward, Detr N FREE TRIA Grows AMAZING NEW ELECTRICAL DISCOVERY A noted surgeon has discovered an amazing way to hair, called Dermo-Ray. In 30 days no more dand Scalp tissues are given new life. Then within a few we luxuriant new hair! The startling discovery of the al magic effect of Infra-Red Rayson the hair-growing t was made by aleading surgeon. Two years ago he wa self bald. Today his hair is full and thick. FAMOUS SURGEON'S DISCOVERY Hereis his own personal, home treatment, called Dern Pay. At last a home method endorsed by scien Guar- anteed to bring you these same results in 30 days— or you pay nothing. You can use Dermo-Ray in home with electricity. The warm, soothing Infra-Red R vitalize the scalp while you rest—a few minutes each d is all the time required. SEND NO MONEY {225° this astounding n scientific discovery, opinions of authorities, incontrover ible evidence, and details of special trial offer tf if you mail the coupon below. To end your scalp a1 troubles, act at once. Print your name and address plain! —and mail the coupon NOW ! -------FREE TRIAL OFFER------- The Larson Institute 216 North Wabash Ave., Dept. 143, Chicago, HL. Send me at once, without obligation,full particular in plain envelope—of your 30-day Free Trial of DERM( RAY me A\ddres City

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POPULAR MECHANICS ADVERTISING SECTION PAY-RAISING BOOKS SENT ON 5 DAYS’ APPROVAL / Modern Automobile “===, Painting ODERN The only book on Auto OMOBILE Painting written in the last ten years. Explains the newest methods of modern automobile fin- ishing; including paint, enamel, and lacquer; with pointers for car and truck owners, refinishers, gar- age men, repair shops, as well as auto painters. By Marvin J. Pearce, B. 5 a Consulting Engineer on Finishing Materials and Methods Profusely il- lustrated. Price $3.00 Books for Painters PERT ESTIMATOR AND BUSI- BOOK FOR PAINTERS Entirely " $1.50 ERT HOUSE PAINTER 4 man- uction for doing every description 3.00

=: 75 RT INTERIOR DECORATOR of the art of painting l PE RI PAINT MIXER of paints used for interior prepa- and ex- <PERT WOOD FINISHER. Entirely STAINER How to imitate various ; with paints and stains I \INTING TRADE HAND-BOOK efinitions of technical terms, methods iting, shop and office managet.ent, rANDARD GRAINER MARBLER OUSEHOLD PAINTER. Full decora- for painting, decorating, papering, etc. Books for Carpenters, Plasterers and Paperhangers ‘PERT PAPERHANGER (Second How to decorate with wall paper, fabrics, ete. Includes estimating table.$2 rO USE THE STEEL SQUARE, Over istrations -ENTRY AND JOINERY A practical | for carpenters, builders and iron- rO READ BLUEPRINTS. Carpenters lding trades mechanics need this val- manual rER AND PLASTERING Materials, is and tools for all kinds of plastering tucco work fully explained Books for Firemen and Engineers NEW QUESTIONS AND ANSWERS Entirely “ $2.00 — Gt IDE / FOR M \ k oper *, wit i answers -++ 3.00 Books for Shop Mechanics AT LATHE WORK ‘onter ne Lathes, Lathe Tools. Lathe Threa t the Pract tions. .$3.00 | both " € ae it 1.90 AL DK AF irs ver 160 detailed drawings 2.50 Know Tue Setiiadita More Pay urest way to get bigger pay \ to Z Here are the books ts and authorities ed to know about your trade vant Our 5-day u get your money's worth "TODAY. DAVID MCKAY CO., is to know your work ill written by practical ing books which will teach you everything Write for the books approval plan makes it How to Avoid Incorrect English \ Will help you to avoid mistakes in English. Points on out the most common mis- . takes in grammar, spelling, How To Avoip and pronunciation and INCORRECT shows what is correct A ENGLISH ing each

few minutes’ pleasant read- evening of this | easy book can develop your } English b1.: | | |

Books on | Foreign Languages THE HUGO SYSTEM for home study make easy for anyone to le rn a foreig! ngu quickly Get one or mort They you more than you re alize Hugo's Danish Sim plified Hugo's French Simplified Hugo's German Simpl ) Hugo's Italian Simplitied ) Hugo's Norwegian simp ‘ 1.50 Hugo's Russian Simplified 1.50 Ss ) Ss i)

Hugo's Spanish Simplified l Hugo's Portuguese Sim plified l Books for Show Card Writers ARTISTIC SIGNS. HOW TO DESIGN AND MAKRB THEM Explains method and prin- ciples of color harmony, design, gold leaf lettering, and trade practice $3 ARTISTIC SHOW CARDS, HOW TO DE- SIGN AND MAKE THEM. Explains how to design, paint and sell modern high grade show cards Books for the Bird and Animal Brecker CANARY BREEDING FOR BI GIN NERS Helpful to ¢ all bird and stock keeper SC METHODS IN THE ART OF T AXIDI + Over 500 figures clearly illustrate the “Ds in preparing and mounting Form rly cont $10.00 a FINN'’S ANNUAL MANUAL ON CAGI BIRDS. Designed for those who keep a few birds as well as for breeders COMMERCIAL POULTRY RAISING A thoroughly practical and complete reference work for the amateur, fancier or general farmer 2 CARE AND MANAGEMENT OF RABBITS A complete guide for the care, breeding and management of rabbits Other Books THE FARMER HIS OWN BUILDER Ex- plains constructions and formulas for buik ing houses, barns and other farm building with simple rules for estimating labor materials required 3 RADIO TELEPHONY FOR AMATEURS. In this book you get the experience of 14 years study by Stuart Ballantyne formerly Kadio Aide of the United States Navy most complete book of its kind avail Explains the ‘‘how”’ and “why” David McKay Co., Dept. 212 604 So. Washington Square Philadelphia, Pa Enclosed find $ certain Fill in the coupon and DEPT. 212 4 So. Washington Sq., Philadelphia, Pa. BOOKS FOR EVERY TRADE Auto Painters House Painters Draftsmen Shop Mechanics English Foreign Languages Carpenters Painters Plasterers Farmers Firemen Engineers Poultrymen Show Card Writers

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POPULAR MECHANICS ADVERTISING SECTION RYAN ~ >— WHIRLWIND MONOPLANE Sister Ship of Col, Lindbergh’; Spirit of St. Louis. One of several of our planes o- 5 suit we 7 Mow in sery STUOEN, pLanes - ice 'N OuR SHOPS COMMERCIAL AVIATION CALLS YOU! Tremendous expansion is rapidly following the dawn of this new era of portation. Train to fly and to make the most of today’s possibilities for a large transport company, actively engaged in flying— passenger aerial photography, surveying, etc COMPLETE ARMY AND NAVY GROUND WORK AT HOME— COURSES —U. S. LICENSED MEN ACTUAL FLYING IN CHIC AGO This organization gives Army and Navy You can start with your gr School courses in aero-dynamics,plane at home through correspon construction, motor mechanics, practical — inte nsively in Chi« navigation, parachute operation and _ million-de i t actual flight training, as well as the cars ae Sa ee a ae commercial branches of the in- °™* “ dustry $300 To $1000 A MONTH— OX5, Hisso and Wright Whirlwind FREE EMPLOYMENT SERVICE motors used—nothing but the most A five-year employment : modern machines ne aeoe - Only U. 8. licensed pilots, instruc- y wig 1. tors and mechanics employed in our we Fh te hangars, — and classrooms. » expre AVIATION SERVICE AND TRANSPORT, INC 203 N. Wabash Ave., Dept. P.M. 12, Chicago, U.8.A Send me your new book on commercial aviation, “The Airway.” training its kind i ’ ‘The Airway,” full of interesting fact t requirements, _ tthods and opportunities is yo 5 Me oin « an Act! ees ans be ase Now! phe or 50 years of age Use the coupon. AVIATION SERVICE AND TRANSPORT, INC.., 203 N. Wabash Ave., Dept. P. M. 12, Chicago, U.S. A. Enclosed is 10c in { currency t stamps Name Address THESE BOOKS MAKE PROMOTION SURE! BE AN OFFICER ERE in seven handsome volumes is a complete education in power plant practice Under the editorship of Terrell in the U. Ss. Coast Guard Croft, a staff of engineering specialists have put into the books everything the power plant man needs to know in order : $1700 Up to $7, 500 Yearly ve » >. early at the U.S Pret while training to get to the tor fart Ernie to Captain In service. Age requir Power Plant Practice ‘ “str'iiccrsus.”” a EQAST GUARD PREPARATORY SCHOO ashington, D.C With the aid of this library hundreds of ambitious men have stepped into bigger jobs. You have the same opportunity With a little spare-time reading you can have the identical knowledge possessed by the highest paid engineers With these books to guide you, you can fit yourself for the big-pay jobs in the power plant field The library eovers the entire field—boilers—valve setting—engine operation— turbines— injectors—foundations—electrical machinery S refrigera- _— ) fuels governors — nm the secrets of Hypnotism—that strange subtle power which ensle a others love you; overcome bashfulness; strengthen y« power; realize your ambi yur me - ons; develop a strong magnetic personal selection of boilers and en- over others. These magic secrete explained in 25 easy lessons gines pumpe ond 5 mp $1.00. Satisfaction Guaranteed. Barga‘n Book Catalog FREE ce eciaiad governore— steam trape— FRANKLIN PUB. CO., 186 N. LaSalle St. Dept. 94 HICAG condensers—pipin Every page is packed with the kind of informa- tion that the power plant needs in his daily u want to get ahes ify to pase an examination for an engineer's license uf you want the big pay that comes with increased knowl- edge—ret these books Free Trial—No Money Down—/c a Day! FREE EXAMINATION COUPON McGRAW-HILL BOOK CO., Inc. 370 Seventh Ave., New York Ship to me, charges prepaid. the seven volumes” of the POWER LIBRARY price $16.00 If satisfact ry, 1 will send $2.00 in ten days $ ® month until the special pri sf $16.00 has been paid. If not wanted I will return Name Home Address City and State Occupation or Position Firm or Emp'oyer

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POPULAR MECHANICS ADVERTISING SECTION Make the Same Discovery John Harned AT LAST A Dead Sure, Intensely Quick Way to Test Your Mental Powers Interesting, Can You Score 75%? >a few months ago that John erheard his worst enemy at the ng with the chief en of the uwreed = the too backw ird : It that he was mechanical iway i brains “ to prove it even to } 1) ild only find some conclusive test one he knew he would be a Then he could kill” that loubt that was making him : e would absolutely that study and work would big success A Cigar and— strange tor coincidence; wh gar that night, the 1 hew pocket a ved hin UZZLER rked it f wr Harned, rapidly 1CAGO he challenged Harne lit take you to lve it irug- wood size, going said the adrugg Late for Supper an hour later Harned was still ruggist smiled “ said Harned ‘Sell me this you a cigar I'll work it right But after hen you have the best mechanical in the world.” w's that?”’ a mental The latest York One man, woman or hundred thousand people in half an hour hey are il geniuses.”’ test 100 How to Score rh it in three hours. for Instan re for 7 You lose 1 every on longer than the first od brains may solve it in s¢ +t} le average people cannot John Harned was delighted Here just what he had wanted Hie wou two hours and a half after supper 97% If he ‘eeded, he would backward” no longer II Racing Time After supper he told his family n young timekeeper John worked. Hestudied. Never had tir 80 fast Finally, his son son told him he hac minutes more Then four minute minutes. Wife and family gathered : him excitedly He failed Fifteen minutes later he let out a g shout Solved!"’ 96 His son solved the PUZZLER in s« hours. His wife did it in ten But Harned's biggest delight came at the office, where everybody wanted to try the PUZZLER The chief struggled with it fourteen hours. Best of all, Harned’s enemy never could work it. It was all John Harned needed The chief has boosted him twice since that Dad’s Puzzler is the name of the handsome, wood block mental test with which Johr Harned found himself. Since then he has made a score of 83 with MA’'S PUZZLER and 91 with THE FLYING PUZZLER both handsome, pocket size sequels pocket size, s : Tremendous Popularity When you can solve these PUZZLERS you are “cock of the walk the center of the crowd. A certain famous resort hotel man of the East entertains many jurists, big divines actors He does the PUZZLER for them once, then bets them fifty cents they cannot do it in half an hour rhey all fail, laugt snort, and refuse to be stumped A man holds the record But perhaps you are a beat that Every body million have been 4 drug store next to in New York ha months Twenty woman wants them Mor old s th Christmas Presents a nest of three make the ¢ mas remembrance of the h engray but different novel them Children f school them And they tral concentrate One ed greeting cards People want age are wild young minds to about Sold Everywhere Many drug and departme Mi or they are and other novelty, tobacco, chain it storesg@ell them now chants may write for proposition stocked by Butler Bros., Liggett large distributors If not in your town, order by mail We send, postpaid, the introductory nest of DAD'S, MA’'S and FLYING PUZZLERS attractively boxed, with mental scoring card in each PUZZLER, for only $1.00 Clip coupon, enclose dollar bill or check Mail NOW PUZZLER DEPT., STANDARD TRAILER COMPANY, CAMBRIDGE SPRINGS, PA. Enclosed find $ nest of handsom« MENTAI postp iid for pocket size TESTS, which wood bloch you wi end Print Name State three, $1.00 Any postage and packir ye enclosed sem e mental test checked DAD'S PUZZLER Move ror upper t opposite lower in box only ; size of la MA ~ separatec sic mone et Re them YING her en PUZZLER Ma | ? L lie und FI PUZ 2 Do New York and land in Paris ir ) I fog, air p breakdowns DAD’S PUZZLER «+ MA’S PUZZLER « FLYING PUZZLER

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POPULAR MECHANICS ADVERTISING SECTION iant Chest Expand and Progressive Exerciser Have the Send NoMoney Be a muscular marvel., muscle; of a superman. Become strong for your health's sake or to astound your friends with extraor- dinary feats which only men of giant strength can do. In a few short weeks you will easily do stunts which now seem difficult—then real muscles and strength will be yours—and yours to keep. If you want exer- cise to just keep in good shape you Can reduce the strength of the Progres- sive Exerciser by eliminat- ing as many cables as you wish. If you want great resistance so as to build up big solid muscles then use the full strength. How the GiantChest Expander and Progressive Exerciser Is Made The Giant Pro- new and with Chest Expander greesive Exerciser is made live, springy rubber so ae t long wearing and great ities D not pay more ciser that hae forty strands t rubber procurable to Free Instructions do not think it an esercivwer enough to worth double so for a limited time include inetructions These instructions simple to follow » short cut to health a strength Order today before wonderful offer is withdrawn Your Guarantee The Giant Cheet with a guarantee ie the finest you money back. 5 Cables or double 10 Gattes for strength The double strength exerc’ser has recistance of over 200 Ibe How to Order—Send No Money Sign your name and addrees to coupon below and get your Giant Exerciser the vresent low introductory priee return The price is made want everyone to enjoy muscles opengts at the lowest resible cost Don't pay more—order rom us—get the most for your money. Use coupon now. and Expander is sold that you will say it ever saw or your PROGRESSIVE EXERCISER CO., 4012 Langdon Bidg., Broadway and Duane Street, New York FP ive Please send © Your 10 cable Progress C) Your 5 cable Exerciser. Cheek the Exerciser you want, and it will be sent you by return mail postman introductory price, plus few cente postage on arrival It ir) ty ne that if you ate not entirely satisfied with sour exerciser you may return it within 5 days and get your money back Name Street City State If you live outside the United States, send cash with order.

LEARN BY DOING Every phase of all branches of ELECTRICITY taught by Actual Practice In one of America’s foremost institutions for trade training ESTABLISHED 1902 No Books Used Individual Instruction Start Any Day Write for FREE64-page catalog THE NEW YORK ELECTRICAL SCHOOL 44 West 17th St.. New York City

STATEMENT OF THE OWNERSHIP REQUIRED BY THE ACT OF Mechanics Magazine, published State of Illinois, County of Cox Be Before me, a notary public in — for the state and county aforesaid, personally » peared H. H. Windsor, Jr., who, having been duly sworn according to law, deposes and says that he is the editor and business manager of the Popular Mechanics Maga: and that the following is, to the best of his knowledge and belief, a true statement ownership, management, etc, of the aforesaid publication for the date show above caption, required by the Act of August 24, 1912, embodied in section 41 Laws and Regulations, printed on the reverse of this form, to wit: First. 17 names and addresses of the publisher, editor, managing editor, and business are: Publisher, Popular Mechanics Co., 200 East Ontario St., Chicago, Ill H. H. Windsor, Jr., 200 East Ontario St., Chicago, Il. Managing Editor, l 200 East Ontario St., Chicago, Ill Business Manager, H. H findsor, Jr Untario St., Chicago, Ill. Second. That the owner is: (If owned by & corporat name and address must be stated and also immediately thereunder the na addresses of stoekholders owning or holding one per cent or more of total ar stock. If not owned by a corporation, the names and addresses of the individu ual must be given. If owned by a firm mpany, or other unincorporated name and address, as well as those of each individual member, must be given Windsor, 200 East Ontario St., Chicago, Ill.; H. H. Windsor, Jr., 200 East Onta Chicago, ll Third. That the known bondholders, mortgagees, and other « holders owning or holding | per cent or more of to tal amount of bonds, m< rtes< other securities are: (If there are none, so state.) None fourth. That the tw graphe next above, giving the names of the owners, stockholders, and security if any, contain not only the list of stockholders and security holders as ti pear upon the books of the ec ap | but also, in cases where the stockholder ity holder appears upon the b« 7 the company as trustee or in any other fid relation, the name of the aan nm or corporation for whom such trustee is acting ; also that the said two paragraphs contain statements embracing affiant nowledge and belief as to the circumstances and conditions under whi holders and security holders who do not appear upon the books of the compa trustees, hold stock and securities in a oa ity other than that of bona fide and this affiant has no reason to believe that any other person, association ration has any interest direct or indirect in the said stock, bonds, or other than as so stated by him. H.H. WINDSOR, Jr., Editor and Business Manage Sworn to and subscribed before me this 28th day of September, 1927. J.GRAI Notary Public (My commission expires June 17. 1928.) MANAGEMENT, CIRCULATION CONGRESS OF AUGUST 24, 1912, of | eae at Chicago, Lll., for October, 192

"35 10°75 WEEKLY ) Resway | ae Clerk( ) Special Agent (inv estigator) rile c yy ) Stenographer-Typist Matron Immigrant Inspector General Clerk City Mail Carrier Chauffeur-Carrier U.S. Border Patrol Skilled Laborer Typist Watchman Seamstress Postmaster Steno-Secretary RFD Carrier Auditor Meat Inspector Mr. Ozment. Dept. 111, St. Louis, Mo Send me particulars about positions marked *“X’’—salaries, locations, opportunities, etc NAME ADDRESS... eer eee

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POPULAR MECHANICS ADVERTISING SECTION The Sweeney School With planes, equipment and instructors under U. § Govt. inspection, the million dollar Sweeney School, with its 150 acre private flying field, club house, hangar and thousands of dollars worth of latest tools, machinery and equipment for aviation, offers young men the most efficient, economical and practical method of getting into this great business. Picture above shows Dr. Brock, a Sweeney flyer, in the air over the Sweeney Air Port. Hangar at upper right. Pilot or Ground Course YOU can select either the pilot course or ground mechanics course or combine the two courses. All the flying with dual controls and later solos to qualify you. All the ground work in motors, ignition, wings and construction qualify you to become an expert and five men are needed on the ground for one man in the air. The cost of tuition is extremely low and living conditions are pleasant and economical. Many men just out of the army come here to take up this work. Student body very high class. No previous ex- perience required. We use tools, not books. Col. Lindbergh Advises You “Aeronautics in the U. S. today are a position no other industry has ever been in. It is probable the great transcontinental air lines of the future will pass thru Kansas City. Kansas City is naturally located to become this hub.” Send name today for full details. 4 Illustrated catalog shows pictures of students at work in shops and in the air. Everything you want to know about aviation. Lists of jobs and high pay offered aviators and mechanics. No colored 20 Hive accepted. pe oe ae SEND THIS NOWe =e = = EMORY J. SWEENEY, President 4406 Sweeney Bidg., KANSAS CITY, MO. q *lease send me full information al it your Aviat i t SCHOOL of AVIATION i 4406 SWEENEY BLDG, KANSAS CITY.MO, 4 Vs ee ee

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POPULAR MECHANICS ADVERTISING SECTION A profitable Business of Your Own for full or spare time. Earn $25 or more a week in spare time. Double your full time pay. This prac- tical method of home instruction has. simpli- fied everything. Why work for low pay? Clever “‘sales-increasing’’ display material is always needed by progressive business enterprises of every description. $10 to $20 is often paid for a single attractive show card. Skilled Show Card Writers command high salaries— right from the start. Prepare now. No special ability needed. Learn at home in spare time through this most complete, practical method Student R. A. Hart writes: “I make not less than $2.00 an hour making show cards in spare time.” tay Underwood (while still a student) wrote: “Am with a large sign company People ask me to do work after regular hours and I clear $25 to $35 a day.’’ Many others have learned Show Card Writing by this method. So Can You if you will simply apply yourself as they did Take advantage of the money-making opportunities open in the Show Card field. Make Show Cards for your present em- loyer or for several merchants at one time. Have a profitable usiness of your own. Earn up to $100 a week—mere if you're ambitious. Send for FREE Book Get busy. Boost your pay. Don't delay another hour Send coupon now for big, Free Illustrated Book and full in- formation. Mail coupon now. No obligation. No salesman will call. ' Washington Show Card School, Dept. 3012-E 1117-15th Street, N. W., Washington, D. C. PE REEELEL ELLE EEE EEE REET EEE EEE EE EEE EEE EE EEE EEE EEE EEE Washington Show Card School, Dept. 3012-E 1117-15th Street, N. W., Washington, D. C. Please send me FREE and without obligation, a copy of the new 32-page book, ‘Quick Success in Show Card Making," and special offer to new students Name eee (Write name plainly and state whether Mr., Mrs., or Miss) Address. . She your own, Santa Claus! There is a Santa Claus! He will help you win for yourself a bicycle, radio, sled, foot- ball or any one of 300 other prizes. You won’t have to wonder how to get a present for Dad, Mother, Sister and the other members of the family. Hundreds of boys are earning their own spending money and winning dandy prizes. They never wonder where their Christmas money will come from. They are Crowell Junior Salesmen who deliver three of the best known magazines to regular customers. They had no experi- ence to start. We taught them how to get their customers. They work only a few hours of their spare time each week. You can, also, be a Crowell Junior Salesman and always have ready spending money. Send today the attached coupon and learn how easily you can earb money and win prizes. Mr. Jim Thayer, Dept. 39 The Crowell Publishing Co., Springfield, Ohio. Dear Jim: I want to be my own Santa Claus Start me off as a salesman. My Name.. Address... Town

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POPULAR MECHANICS ADVERTISING SECTION gh LE st ww % Dont Sing Scales ‘Use Silent Method URPRISING! Yes, unheard of perhaps to you. Entirely revolutionary to all usual methods S of teaching voice. But 30,000 pupils acclaim this new silent method and 30,000 pupils tell of astonishing improvements. You will recognize Prof. Feuchtinger’s method as based on sound scientific facts. Don’t take a chance of ruining your voice by straining at monotonous and tiresome scales. He will teach you to build up the strength and elasticity of your vocal organ through scientific muscular exercise. These exercises are silent. You may practice them in the privacy of your room. With surprising rapidity you will notice that your voice is becoming stronger, richer, more beautiful every day. 100% Improvement hm * Studio 13-59, - 1922 Sunnyside Ave., | ? Chicago, Ill. a uarantee Ff conser, once, free and without 4 obligation, your beauti- fully illustrated book Prof. Feuchtinger is a voice teacher who actually guarantees results! Toyou, as @ “Physical Voice Culture,” to every one of his pupils, he says: “I will improve your voice 100% or refund - and full information regarding your tuition.’ Nothing involved about that guarantee. It is so simple and direct your home study method of voice that it is astounding. You are to be the judge. If you, yourself, do not think, @ building. It is understood that I do after completing the course, that your voice has been improved 100%, back ¢ not have to pay a cent for this book, comes your money. Send the coupon and get the most inspiring book eve r either now or later, and that I do not written about voice—actual true stories of those who have won fame have to return it. and money as a result of Prof. Feuchtinger’s training. The book is ? free—it is yours to keep without obligation of any sort. He can do 2 for you what he has done for many thousand others. Send the ed Name coupon right now while you are reading these words and you have made the first step toward the voice you've longed for. ? * e . o 4 Perfect Voice Institute "7 Fexcttines: AM. Address irector 1922 Sunnyside Ave., Studio 13-59 Chicago, Ill. o

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72 POPULAR MECHANICS ADVERTISING SECTION TheWhole Amazing Story Miracles Worked "Muscle NOW FREE TO READERS OF POPULAR MECHANICS VERY reader of Popular Mechanics Magazine is familiar with the extraordinary muscle-building feats of TITUS, the famous pioneer in the field of physical training. Many photographs have appeared in these pages of men re-built by TITUS—photographs taken before and after. These pictures show real miracles worked in muscle—amazing transformations from puny, flat-chested weaklings into giants of strength—all in the short space of 30 days! How is it possible? What magic does this man Titus possess? What is his startling secret of building muscle? Now it can be told! +A wonderful book has been written—a book that reveals the inside secrets of Titus Training—a book crowded from cover to cover with sen- TITUS amal Gaeta « . er § » ance sational facts about strength, power and endurance. (Dept. am WsE 188 a RUSH COUPO tenaasdeenamnaean % Yes, I want "ee, This bookis yours FREE—if you rush the coupon. The demand will my copy of the *., be overwhelming —every reader will take advantage of this remarkable Titus book disclosing “ee, opportunity Don't lose a minute. You want this book, you must his secrets of building ~~ have it. You will eat up every word it contains. You will marvel the most powerful muscles *e, at the dozens of photographs— every one a sensational demon- ever put on the human body ~~ stration of Titus RESULTS. Stories of champion strong men, par By to me by return mail— %, stories of invalids transformed into marvels of physical per- REE, ~. fection, first-hand tips from the Master Trainer of them all. “Me, fail the coupon TODAY! First come, first served. *», x cost, no obligation, no strings of any kind. This *, bookis yours, free and clear, for alltime. Send NOW. ™ — Address. Dept. P-121 e = oe. '* e ne 5 st: and Only T i T U Ss ad voce City

COMMAND A LARGE. STEADY INCOME! The Technical man always wins. . ‘ Technically trained men are in constant Drafting 2° - Architectural. . Machine demand. Become independent by using é ‘ . Electrical. . Structural Steel your spare time at home to master any of the crafts listed opposite. The St. plied Chemistry, University Without cost + one ay pga me of Pennsylvania. full details of your home-study course in CHEMISTRY » Mail coupon for , Free Booklet i as al

| Fl

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POPULAR MECHANICS ADVERTISING SECTION Follow Him / fame 10 years ago. PARTIAL LIST Graduates U.ot A.S, ecently sppeinsed Finger Print Ex- erts of these tates, Cities and Institutions. State of lowa State of Idaho State of Colorado State of Washirgton State of Michigan Duluth, Minn. ew Haven, Conn, Great Falls. Mont. Galveston, Texas Albany C conty a (tiary Wetcrlon, Towa lowa . Wilkes Barre, Pa. Ei P MAGINE the keen thrill that would be yours following some case like this: The escaping des- perado is a notorious international character with a long record. He’s wanted in five countries. Rewards range from $5000 to $25000 for his capture. He loots a palatial man- sion. —y. — —. c Dis- appears anges his entire appear- ance. Pulls a clever “dead” fake and is recorded as “Dead” on all police records. Dead to all records except ONE—the Inevitable Fin- ger Print. For ten years he deceives the world. Prospers. Becomes a social lion. And then—Bang!— the Finger Print Expert nabs him. Society is shocked. They can’t believe that this social Prince is the famous Mr. “X” of criminal But finger prints do not lie. Never! The Finger Print Expert always wins. Glory, fame, rewards are always his, Thrills! Rewards! Await YOU! Imagine the thrill, mystery, glory, fame and re- ward that would be yours if you were this Finger Print Expert. You can make them yours if you will. You can learn the secrets of this great science at home in your spare time. Any man of ordinary ability who can read and write can become a Finger Print Expert in a short time at a small cost. A brilliant career and a handsome income with world-wide opportunities awaits you. Act Now. Don’t let the other fellow enjoy what is rightfully yours. Mail that coupon now and learn the great things that are in store for you. Course ecret in ervice UNIVERSITY OF APPLIED.SCIENCE 1920 Sunnyside Ave., Dept.13-59 Chicago, Ill, Gentlemen:— Without any obligation whatever, send me your new, fully illustrated Free on Finger Prints and your offer of a FREE course in Secret Service ln- telligence and the Free Professional Finger Print Outfit. FRE If you mail us that coupon now you will get in on a special free offer we are making for a limited time of a professional finger print out- fit free, and a Free Course in Secret Intelli- gence without extracost. Noobligations. You have everything to gain and nothing to lose! Act NOW! Write for handsome FREE BOOK. University of Applied Science 1920 Sunnyside Avenue, vept. i359 Chicago Name

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POPULAR MECHANICS ADVERTISING SECTION

Automobile Mechanics are needed! Prepare yourself now for a big-pay auto job!

HE demand for trained men in the auto- mobile field is far greater than the supply. More than 15,000,000 automobiles are in use Pee ; mane ts 08 CN ees . . - iwipped De Luxe Mo ct Nash Sediem. ak tell celia in this country now, and every week the figures n cash if preferred ($1,085.00). In addition to grow larger. £4 Res There are not enough trained automobile service and unswi natrope Phonograph, a Six Tube repair men to keep up with this steady growth Single Dial nan Radio a Cor: — Portab If you are not satisfied with your present earnings, look i agg a Mseag se ncor-al aluable prizes { Hun- into this proposition NOW. f s in Cas Just Published! Retes This Puzzle ‘ The —ze aoe ay ne to a siphseoels wo words, ne alphabet is numbered. is I, PRACTICAL AUTOMOBILE Sos eatin Wes nan te Oa cane ae Li BRARY your answer right away. It may mean winning the Nash Sedan or $1,400.00 in cash, Four Books—$1.50 in 10 days and $2 monthly $315 00 Cash For Promptness for 6 months—only $13.50 in all! : se , ’ y $13.5 : In addition to the two automobiles, the These four practical books, written by five well known many other valuable prizes and Hundreds of teachers of automobile practice, will teach you, right in ei Cash, we are also offering a Special your own home during your leisure time, just what you rize of $315.00 in Cash for Promptness. First eed to k w about ccanuhile trouhies and renal They prize winner will receive $1,400.00 in cash, or I eee oO Kno abdoul au epg dile roubies and repair 1ey the Nash Sedan and $315.00 in cash. In case of ties will teach you automobile construc tion, maintenance and duplicate prizes will be awarded each one tying. Get repair as experts know them and will help you to earn an busy right away expert’s pay.

. Solve the puzzle and send me your answer together with your name and address writteg eS = plainly. EVE RO ootine RE gy > " en Your Big Chance—Get Ready for it! _—_———— 323 So. Peoria St., , =m it,

Hundreds of question-answering diagrams—hundreds of clearly-marked illustrations—make the books plain and readily understandable to any man with the me- chanical instinct All the explanations and descriptions are clear, simple, direct Every chapter is packed with definite, step-by-step, how-to-do-it information. Examine This New Library Free No money down Small monthly payments These books were written specially for self-instruction by men who have trained thousands of automobile op- erators and garage men. Examine the library for 10 days Only fifteen minutes a day with th: free. Just fill in and mail the attached coupon DER BOOKS will prepare If you find the books what we say they are, send us ; : = Drafting job in less than a year! $1.50 in ten days and $2 monthly for only six months. and Fy yy Drafting fr ant , Ss. ser > ¢ m straigh ines to important, comp! eee ee ee en oe Oe eee oe For Beginners — step at a time! Built especially for I ; ; I b mp to take a 4 Big Volumes for men with only grammar sci look at the books. Act now! Written so you can une img room practice plus enginee Je a day pays for derstand ever by and clear! these books! 1 Architect ». Del. xe ~ he. ae popes Pay! mpetent Draft b

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and do. Le wit eet FREE and see der yours you f nail co diat rth more the American Technica 1 Society Dept. D-919, 58th & Drexel Ave., Chicago

a FREE EXAMINATION COUPON McGRAW-HILL BOOK ae Inc., 578 Seventh Ave., New York Send me for 10 days’ _ @ examination the rw Practi al Autor If saat y ry.Iiw $1 lay < ) y t of 613,40 is pala "lt not ated il return the books at American Technical Society Dept. 0-919, 58th & Drexel Ave., Send for 15 days’ free se 4-volu set send ab

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POPULAR MECHANICS ADVERTISING SECTION = | SAS PA” AMERICA’S GREATEST AIR SOCIETY e American Society for Promotion of Aviation was organized by 12 ex-service aviators at the y and Navy Club, New York City, in 1925. lur objects as incorporated are to “arouse and maintain interest in aviation” and eventually to **Make-America-Supreme-in-the-Air’’ We can accomplish our objectives by having a landing field or air port in every town, and by training red-blooded Americans in the art of flying. FLYING CLUBS WILL BE ORGANIZED IN EVERY COMMUNITY. THIS WORK ENDORSED AND SUPPORTED BY AMERICA’S LEADING AIRMEN. You can participate-in this great movement by becoming a member of THE A. S. P. A., and, ur representative, work for aviation in your community. Join Aviation’s Great Fraternity — ENROLL NOW!!! MEMBERSHIP fee ONE DOLLAR which covers the cost of silver wings, membership card and literature of the A. S. P. A. Silver Wings > Actual Size Secretary, The ASPA 522 5th Avenue New York City, N. Y. Yes, I am interested in aviation! Please enroll me in the American Society for Promotion of Aviation. | enclose membership fee of One Dollar. Please send me my wings.

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POPULAR MECHANICS ADVERTISING SECTION Drawn from actual photograph of student doing spare time electrical work Learn Electricit Make Bis Mon How would you like to earn two or three dollars every evening after school and prepare yourself for a fine big job at the same time? Here's the opportunity of a lifetime for you fellows who like Electricity Begin right now to g hy prepare yourself for a regular man's size job in “Although the this fascinating field Your chances for a big success are simply wonderful—the pay is big (thousands of men earn $70 to $200 a week) and advancement comes swift and sure IWill Train You atHome With my easily le irned spare time Electrical Course I will train home like I have trained hundreds of ys who are now big successful men 10t interfere with your school work and ou Cs an earn more than the small cost of the irse doing odd electrical jobs in your spare time rhe Course pays for itself I will show you how to get this work and how to do it me of my boy students make $10 to $15 a week this way Tools, Apparatus and Radio Course —Given Without Extra Charge Send me the coupon below and I will tell you all about the + J outfit of tools, apparatus and instruments and a new Radio Course that I am giving to my students for a limited time. I will [job caleba atias send you my big interesting Electrical Book J|school, on which I and a sample lesson, too—all Free. You will made $3 and brought be tickled with the things I will send you Free. [which pecimesce Mail the coupon right now $5.50. f. L. L. COOKE, Chief Instruction Engineer L. L. Cooke School of Electricity Dept. 019 HICAGO my examinations, I manage to keep ap with my groetsien! studies an uess r ‘Sonnet ou lam now have all the work I cando,averaging $20 30 @ week, thro opare time work. ROGER 3 SMITH, 1215 Chestnut St Greenville, N.C a. a Chief Instruction Engineer, » En Cooke School of E’ectricity, Dept. ‘O19 2150 Lawrence Avenue, Chicago Send me your big Electrical Book, Sample 3 ind particulars of your Electrical Course and Extra Radio Cour rt will not obligate me in any way Home-Study: Air Commerce Needs Men! Don’t envy the Highly Paid Air Man—Be One! Air Men are indemand. Beat the other fellow to the High Salaried Jobs in Aviation. Western training will qualify you to enter Aviation. Learn how through our catalog, sent on request Write for Free Catalog “Airplanes and Flying”’ Aeronautical Training Division WESTERN AIRPLANE CORPORATION Dept. M-12 Monadnock Block Chicago, ll. Special 48 p. catalog *‘S'’—Show Card and Sign Writer's supplies. Also catalog “A Arts plies. Save Money—write— BART SUPPLIES, 503 Eustis Bidg., MINNEAPOLIS, Mit FREE BOOK ON MIND TRAINING An instructive book which explains an amazing syste training already used by more than 650,000 peopl Let us send you a free copy of “Scientific Mind Training show you how and why Pelmanism is the only system of t developing all the mental powers at the same time. End such distinguished men as Judge Ben B. Lindsey, Sir Harr Jerome K. Jerome, Prince Charles of Sweden and hundred Write TODAY to THE PELMAN INSTITUTE OF AMERICA 71 WEST 45th STREET DEPT. 612 up- rea this w orid-tamee us Ex Goes the Price on this S$ M A S hi Famous Muscle-Builder The champion muscle-making Exerciser of fecmaaen oem the world! Develops GIANT muscles i ra NSTITUTE 30 days. Big, powerful cables made of McFADDEN L _~ genuine live Para rubber. Your choice P 4 ese = , 5, 10 or 15 cables Satisfaction at ao 2 JARANTEED. Money back y NEW YORK CITY can match it at THREE Send Exercise TIMES the price enclose specia My money bach Rush Coupon after one week's t First come, first served Take advantage of this sensationally reduced ? price NOW f you * want health, vitality ~£ a superb physical ~& development, get - this bargainofa .& lifetime -

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and Sign Art Sup- POLIS, MiWh ——4 | this silder NSTITUTE t-121 was K CITY POPULAR MECHANICS ADVERTISING SECTION ¢ man, if you are mechanically inclined, this is the mportant month of your life. Now is the time you should come straight into the Sweeney Auto ! and learn in a few short weeks the automobile and fit yourself for a sure-fire big pay job doing you like. You can send for a catalog but that necessary. 70,000 men have gone through this ol and you can just write or wire when you are ng and all will be ready for you. Don’t worry previous experience or any scholarship; no ex- e is necessary and we have even made good mechanics out of could barely read or write. We teach with tools, not books. w you want to know all about the NEW FORD CAR and ls of jobs are open for men who can handle the You will learn this at Sweeney's. Many old ies now coming in for this special work. EMPLOYMENT DEPARTMENT helped L. W. to a job at $18.00 A DAY — IT helped J. H. Miller t job at $10.50 A DAY IT helped Gordon Shyrock to a job at $10.50 A DAY, and it, also, is helping dozens of the weeney Graduates to fine jobs at $10 to $18 aday, IMME DIATELY after finishing ONLY A SHORT COURSE OF SWEENEY TRAINING, The Sweeney System es by practical, personal experience. You work ls, not booke. You learn by doing. Million school with complete equipment. You need no 8s experience. If you are looking for success id working at a trade you like write me today. 8, mechanics, repair men, testers, garage painters, welders, demonstrators-- thousands » needed and opportunities are everywhere. 1 are mechanically inclined simply send name r my big free book how to fit yourself for v high paid employment in the auto business. LEARN A TRADE; Battery and Ignition Dept. a ' j : ' i - . ’ ot ' . 4 CATALOG AND FREE SPECIAL OFFER Get my big FREE 72-page catalog. It shows hundreds of actual photographs of men at work in my magnificent new school. Tells all about wages, profits, opportunities in auto business. Explains step by step how you learn. Interesting letters from graduates tell- ing how they made _ good. Shows how men come from all over the world to this bigschool. Makes you want to join the crowd. Tells everything you want toknow. I will gladly send you a copy beautifully illustrated. I'll tell you how to get into business for yourself No colored students accepted E. J. SWEENEY President To save time, write or wire when you'll arrive and we'll be looking for you! No need to delay Just come along! EMORY J. SWEENEY, President 4431 Sweeney Building, Kansas City, Mo. Send me free, without any obligation, your eatalog and Special Offer!

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POPULAR MECHANICS ADVERTISING SECTION This illustration shows the | building of the McCleary Sanitarium and Clinic at Excelsior Springs, Missouri—the largest in- stitution in the world devoted to the treat ment of piles and other rectal troubles. (Only curable cases are accepted.) A Serious Affliction : Cured Without Surgery HE old theory that piles can be cured only by surgery has been wholly disproved. This treacherous affliction which slowly but sure- ly undermines the health of its victims can be " cured—totally and successfully—w ithout the dangers of a surgical operation. Patients From All Parts of United States and Canada ® For 27 years, Dr. A. 8S. McCleary and his asso- ciates have made an exhaustive study of rectal diseases. During that time, more than 13,000 patients from all parts of the United States, Canada and foreign countries have been success- fully cured. Scores of these had been given up ~ as incurable and many others were chronic cases of long standing. Absolute Relief or No Pay No matter how long you have been troubled— k No matter how distressing your case may be— No matter how many treatments you have had without avail, if your case has not been neglected so long as to be incurable, we can promise you absolute relief or no pay. If you or any of your relatives or friends are in- terested, we will gladly mail you our free book, “Piles Cured Without Surgery.” This book fully describes the McCleary methods of diagnosis and treatment of ali rectal troubles, and tells you exactly what is offered here at a very nominal The McCLEARY CLINIC and SANITARIUM 254 Elms Boulevard EXCELSIOR SPRINGS, MO. ‘4 W McCleary Clinic and Sanitarium 254 Elms Bivd., Excelsior Springs, Please send me book fully McCleary Method of Treating Surgery. Mo. describing the Piles Without Name Street Address... Town or City Showing Car Owners How ty SAVE GASOLINE! New invention bringing big profits to agents, Her. rick made $157 in one day showing new wa to save gasoline and end carbon trouble. Unique demo, stration plan brings sales quickly on proved results. Natio; advertising helps you. Over two million now installed, Fit, any car, truck or tractor. FREE! To introduce in every locality, ; ventor will send samples to car owners and distributor’. No sale if it doesn’t show results. Write fo, details to J. A. Stransky, W-10 Stransky Block, Pukwana,s p HEN our VACUT MCA is used a few 1 daily. We accept 1 until you have tried the ( 60 days and are gatisfic Vacuum Cap is an appliar that draws the blood tot Roots and starts a new | crop of hair. It stops D stops the hair from falli Bought by Doctors and men who know that it is thy reasonable HAIR GROWER known toscience. N Used. Write for application blank, testimonia booklet on “ HAIR,” sent sealed in plain envelope, | THE MODERN VACUUM CAP Co. 559 Quincy, Denver, Colo. Save Yi x When all else fails, end your suffering with the LY Heefner Arch Support No Metal Fully patented. Itre-adjusts the entire foot. Write for free book and statements from doctors and users. 658 M. E. Taylor Bldg. Louisville, Ky BUCHSTEIN’S FIBRE LIMB ‘ oott Heefner Arch Support Co. o. UcHSTEIN, co. 610 MINNEAP OL! ‘s, iin imin STOP USING ATRUSS STUART’S PLAPAO-PADS are different from the truss, being me- chanico-chemico applicators made self-adhesive purposely to hold the distended muscles securely in place No straps, buckles or spring attached—cannot slip, so cannot chafe or press against th: pubic bone. Thousands have suc- cessfully treated themselves at home without hindrance from work s —most obstinate cases conquered ra Gold Medal Soft as velvet—easy to apply— inexpensive. Awarded Gold Medal and Grand Prix of recovery is natural, so afterwards no further use { cE We prove it by sending Trial of Plapao absolutely PLAPAO CO., 733 Stuart Bidg., St. Louis, Mo Send for Catalog Today eywig oes Reduced Fac-Simile Write name on Coupon and send TODAY.

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POPULAR MECHANICS ADVERTISING SECTION 79 Button Rupture Newest Way [ Without Pressure] HSTEIN CO. d Ave., So LIS, MINA Ss wecuced eywig-o84 I take pleasure in informing you through the use of the New Science System my rupture is entirely relieved At the time 1 ordered your System I had been ruptured 20 years. M. P Brumbaugh, Juanita, . [ am writing to let you know that my rupture does not trouble me any more and 1 think in a little while it will be gone. Your ap- pliance has all you claim for it Before I got it 1 could work only part of the time Now I can do al- most anything. Mrs. C.W. DeLong, Gilboa, N.Y CIENCE now advises discarding cruel steel springs, barbarous leg straps, and other har- ness that press against the rupture and thus pre- vent nature from healing it. A new sensible method has been perfected, after thousands of test cases, called Magic Dot—entirely different from any other way. Instead of “‘pressing’’ it **seals’’ rupture, and of course allows users to run, jump, bend and cough in perfect safety. Breathes Air With this 1-25th oz. device is a new kind of pad, air-porous and washable. It actually breathes air, and cannot slip off the rupture—a feature, you’ll frankly admit, that is lacking in your present appliance. In fact, it is so superior and dif- ferent that it is praised by physicians as ‘‘an entirely new departure.’’ Users report they have forgotten they are wearing it. But don’t buy it yet. See It First By a special arrangement you can now have it sent to your home without obligation to wear it. Don’t send a penny or order it now. Just mail the coupon for full description of *‘Magic Dot”’ and details of this unusual offer. Act now for quick relief. Write your name and address on the coupon and mail it today! NEW SCIENCE INSTITUTE 2143 Clay St. Steubenville, O. New Science Institute, 2143 Clay St., Steubenville, O. Please send me free your illustrated book and sample of Airtex. Include also your offer which permits me to see the New Science System without cost or obligation.

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POPULAR MECHANICS ADVERTISING SECTION ‘DOUBLE PROFITS “How I got the job that 34 others were seeking’ THIRTY-FIVE men applied for the position as Adver- tising Manager of a big department store in New Orleans. But Sam D. Reeks was selected above all these other men because he was trained. He says: ‘My I. C. S. course enabled me to put my facts before the proprietor of this business in such a way as to prove that I knew what I was talking about. I was << as well equipped to dis- cuss his advertising with him as if I had been at the work for years and years.” Mr. Reeks was given the position—and he made good in a big way after he got it—because his In- ternational Correspondence Schools course had . pared him to take advantage of his Opporti when it came. Just a few years ago he was elected president of the Advertising Ciub of New Orleans— another tribute to his personality and ability. Why don’t you study, as Mr. Reeks did, and prepare to get a better position and a larger salary? uu can do it Hi you really try. At least make the start by marking and matting the coupon printed below and find out what the I. C. 3. can do for you. It doesn’t cost you a penny or obligate you in any way to get the facts, but that one simple little request may be the means of changing your whole life “Do it now.” Mail the Coupon for Free Booklet mmm ee eee ae eee INTERNATIONAL CORRESPONDENCE SCHOOLS Box 6689-E, Scranton, Penna. Without cost or obligation, please send me a copy of your book- let, “‘Who Wins and Why,”’ and full particulars about the course before which I have marked X in the List below: BUSINESS TRAINING COURSES Business Management ()Salesmanship Industrial Management L) Advertising Personnel Organization { ) Better Letters Traffic Management {)Show Card Lettering Business Law OSte nography and Typing Banking and Banking Law (jEnglish Accountancy (including C.P.A.) LICivil Service Nicholson Cost Accounting (jRailway Mail Clerk Bookkeeping LICommon School Subjects Private Secretary LjHigh School Subjects Spanish 0 French C)lllustrating C) Cartooning TECHNICAL AND INDUSTRIAL COURSES O) Electrical Engineering Architect {Electric Lighting Architects’ Blueprints C)Mechanical Engineer Contractor and Builder L})Mechanical Draftsman Architectural Draftsman Machine Shop Practice Concrete Builder Railroad Positions Structural Engineer Gas Engine Operating Chemistry oO Civil Engineer Automobile Work Bate ying and Mapping Airplane Engines Pharmacy Metallurgy C) Mining Agriculture C) Navigation ]Steam Engineering Mathematics 0 Radio

Name Street Address City Occupation Persons residing in Canada should send this coupon to the Interna- tional Correspondence Schoole Canadian, Limited, Mentreal, Canada

f

i PLUS 257% EQUALS OO INA ~~ MONTH 044° INVEN TIONS Here's something startling, new! A revolutionar “Twin” plan of selling that pays men everywh« double profits. So read the Free Test Offer Below Then act! One of the most sensational chapters in the history of d has been written in the past 4 months! For, almost incré may sound, in that short time over 2,000 men have di secret of double profits on 4 out of 5 sales TWIN INVENTIONS — NEEDED EVERYWHERE This unique plan is made possible by two re volution: ar inventions A new kind of can opener, absolutely autor the can, cuts the top out (not off) inside the rim, leaving slick and clean—all in a couple of seconds at the turn of ends forever all stabbing and hacking with old-style can twin invention, an equally revolutionary knife, scissors and tool sharpener—operat- ing on new, patented magic groove” principle—sharpens automatically at a twist of the wrist

Every home feels an instant need for at least one of these amazing new devices Four out of five buy both because of unique interchangeable feature both operating from same tiny wall bracket rhere is not room for all the sensational details here. Our plan includes practical sales training course. We furnish everything. Exclusive Write today for Free Test Offer and proof of $68 to $150 CENTRAL STATES MFG. CO. Dept. W-701 4500 Mary Ave. St. Louis, Mo 5 SASS CSRS ESSEC CST ESSE SESE SESS ESE S EN SEE ESSE SEER EEE EERE EEE EEES, CENTRAL STATES MFG. CO., Dept. W-701, 4500 Mary Ave., St. Louis, Mo. Rush me details of your double prof i Free Test

Town PETTITT iii iii

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POPULAR MECHANICS ADVERTISING SECTION I have trained thousands of men to be auto and mechanics, and I can train you all it takes. No previous mechanical necessary. Very little sc Rodin required practical, work-while-you-learn methods anyone tractor 8 weeks is experience With my simpk can quickly fit himself to go into the auto and tractor business or work for others at big pay. Hundreds of McSweery trained men are m $75 to $125 a week. And there is room for thousands more. Big pay jobs all over the country are begging for skillfully trained men. This is Your Opportunity to get out of the rut and learn a trade where you can make real money. Write at once for my big special Fall and Winter tuition offer which includes R.R. FARE and BOARD verrnis. am prepared to handle thousands of students this season and I *. making the most liberal offer you ever heard of. ou'll be sur- prised how little it will cost to fit yourself for a big pay job. I promise you satisfaction or money back. After you have completed my course, if you are not satisfied that I have done everything possible aking to fit you for a big job,

FREE of extra cost General Electrical Course House wiring, armature wind- ing, motor work and all general electrical train- ing. Both alter- nating and direct current work.

I'll refund your Big Auto Book tuition. Hurry! Mail the coupon now. Get liberal tuition offer and details of Gostte al I want to send my big, boousteutty illustrated auto book FR to course FREE. every man who is intere etal ‘ie a iy & better job and bigger pay. : Tells all about my training : methods and big oppor- tunities in auto and tractor repairing. SWEENY AUTO, TRACTOR SCHOOLS and ELECTRICAL Dept. 11- T-z2 CINCINNATI, OHIO; CLEVELAND, OHIO sececees® | LEARN AVIATION AT HOME || Learn Watchwork, Jewelrywork Under Lieut. Walter Hinton and Engraving A fine trade commanding AVIATION INSTITUTE OF U.S. A. a good salary, and your services Ceonmatiownden 00. Washineton, D. C always in demand. Address Horological, Dept. P, Bradley ee cementing a Institute, PEORIA, ILLINOIS, for our latest catalog. « [LEARN CARTOONING AT HOME DURING SPARE TIME The Landon Picture Chart mail makes cartooning easy to learn. Write today for pict ure chart to test your ability and examples of the work of successful students now earning $75 to $200 and more per week. Please state your age. THE LANDON SCHOOL, 2838 National Bidg., Cleveland, v= a rani ”7-_-— -——_- —— ~ , Hone= PHY: = HOMES: in half usual time; at trifling cost, with the wonderful Automatic Trans- TEACH YOURSELF mitter, THE OMNIGRAPH. Sends unlimited Morse or Continental messages, at any speed, just as an expert operator would. Adopted by U. S. Government, and leading Soiver attics Caleete conte OMNIGRAPH MFG. CO., 13-19 Hudson St., NEW YORK * WORK FOR UNCLE SAM MEN 18 TO 45 City and Rural Mail Carriers

McSweeny Schools, Dept. 11-T-2, Cincinnati, O., Cleveland, O. Without cost or obligation, send me your b lg FRI E book on Autos; full details of your big offe including R. R. Fare and Board Paid, and FRI E electrical course. Auto, Tractor and _ Electrical mac also, HIMSELF Name Street Town

School that has trained hundreds of successful cartoonists of today. f teaching ORIGINAL drawing by 1ERE

First Month

Duis, Mo peneeeeee: Franklin Institute (No connection with U. S. Government) Dept. R306, Rochester, N. Y. Rush to me, WITHOUT CHARGE, (1) Your $141.67 to $275.00 Month 8° dz rae tite ohn by Cy of Re Ff culal oO 10 o get 2 fg mew fay ae Ag Pald Vacation. een — ya Mail Carrier at $141.67 to $275.00 a month Sufficient. Pull t oe Name MAIL COUPON—TODAY SURE Address «* . -

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POPULAR MECHANICS ADVERTISING SECTION Learn To Fly Earn $50 to $200 Week As Electrical Expert Train at National, Los Angeles, in the center of Cali- fornia’s $100,000 ,000 electrical development program, The tremendous increase in development of enormous electrical projects has created a big demand for trained men with practical knowledge. YOU can quickly get into this fascinating industry and earn $50 to $200 a week. National training will qualify you. Actual work on modern electrical equipment helps make you a skilled expert in Power House Operation, Mo- “After leaving Na tors and Controls, Central and rical School, I obtain Sub-station Operation, Arma- ent with the So. ture Winding, Motor Build- ° ing, Electrical Fundamentals, Drafting, Illumination, Com- mercial Radio, Radio Con- struction, Battery Manufac- ture, Automotive Electricity, ete. Expert instructors; mil- lion-dollar shops; liberal ‘‘no- time-limit”’ training plan as- sure success. Over 17,000 suc- cessful graduates of this quar- ter-century-old institution. L. W. Bell Gets Two Promotions in 19 Days . Free Employment Service National graduates are preferred by many big electrical employers. Wehelp you get the kind of job you want upon your graduation We also assist you to get part- time Jobs to pay living expenses while training. Mail the coupon now for big free electrical book. Explains everys thing. Make your start to win success today. IONAL aN ELECTRICAL ‘ SCHOOL i Dept. 513 4006 Figueroa St., Los Angeles, California 1 Please send me your Free, illustrated National Electrical 1 Book describing opportunities in the electrical industry ° and illustrating National training methods. : Name a Address * City Se Weeks From Winner of National Air Races Let ‘~~ aviator, E. B. Heath, winner of the National Air Races at Spokane in 1927 and at Philadelphia in 1926, teach you how to fly. Heath has been building and flying aeroplanes for 20 years. Learn avia- tion, aeroplane building and flying from this . veteran flyer. Learn in the oldest and best-equipped flyi in the country—no books, no mere theory, you learn practice. Learn in areal air craft factory with latest and best flying equipment and experienced instructors. Big flying field in connection. Complete instruction in motors, ignition, and aeroplane construction. sae ng school by actual ‘Employment Service Employment service to al! sty. dents enrolled in our day ir Our tremendous aeroplane factor Aeroplanes manufactured by , - » y Heath have been the national cham-} Needs men. We help you get a job sions for the past two years. The while learning. Special employr — rene! = a place B - service for evening students in wo events «4 he Nationa Ar Races at Spokane. Heath “Ton of additional funds. leath om- boy” won first place at Philadelphia . . . in 1926. Big Money in Aviation Write for illustrated catalog No need to tell you that ever one describing Heath made aeroplanes bigger demands for trained flyers. ~ Send only 10c to cover partial cost. big money awaits you in this fas Agents wanted to represent us in We offer our graduates e their home territory. Write for famous aeroplanes in full details. You can make big money r only f 4 selling an made planes Write today for full information regard Write for Catalog .,.°.: flying echool. Read how you can learn t weeks. Get full details, prices and terms of our complete day and evening aeroplane building and flying. See employment offer. No obligation. W t A postal will do x HEATH SCHOOL of AVIATION, Dept. 3379, 2856 Broadway, Chicago, Heath Parasol Aeroplanes th Amazing new method teaches men or women to earn after first lesson. OIL PAINT photos — portraits, landscapes or art subjects. Earn $18 to $50 and mores week. OIL PAINT OUT- FIT GIVEN. Send now for free illustrated book. PICTORIA! ART STUDIOS Inc. Dept. MP. 2926 Broadway, Chicago, ! ’ Thousands of appointm« GET GOV’T JOBE wii yeariy, Clood sala —short hours—liberal vacations. Common education usually sufficient. Hampton will help you prepare to pass next ( 1 Service examination with high mark. Write for free booklet L. HAMPTON, BOX 1818-X3, WASHINGTON, D. Cc. 7 BE THE LIFE OF THE PARTY : . Learn to Whistle I'll teach you in 24 hours to whistle the latest and imitate bird calls using your tongue and | new method. Amaze your friends, w C solos at parties, over radio, earn ¢ money, be popular. FREE with order visible Bird Call. Complete with instructions 25 JACK THE WHISTLER, Box 262, Dept. 1-X, New Haven, Conn. | = Physical Training for Height Increasing My scientific physical training Cour and apparatus have for their spe object the increase of height. Tl have been remarkably successful, be- side giving buoyant “pep,” abundant healt! and improved appearance. To be of full height means more efficiency and ability to incre your earning power. Course is easy, inexpensive, and_ results sure. faction guaranteed on money back basis. Write today for Free and Complete information, stat present height. L. GLOVER, Dept. A42, Sausatito, caL.

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POPULAR MECHANICS ADVERTISING SECTION gos | Post Office Clerks and best “te : City Mail Carriers Rural Mail Carriers Railway Postal Clerks Y) Prohibition Agents Stenographers Income Tax Auditors Clerks in Government Offices at WASHINGTON, D. C., and ELSEWHERE $4140 to *3300°° a year steady positions. Strikes, poor business conditions. lockouts or politics will not affect them. vernment em ployees get the ~ pay for full twelve months every year. There D TIMES” in the U. 5. Government Service. RAILWAY POSTAL CLERKS Postal Clerks now get $1900 the first year regular, peing paid on the first and fifteenth of each $79.16 each pay day. Their pay is quickly increased, $100 and $150 a year, the maximum being year. $112.50 each payday ‘hey get extra allowance for hotel expenses when away from home On Fast PAID VACATIONS Mail Through Potomac Valiey Railway Postal Clerks, like all Government employ- 7 ees, have a yearly vacation of 15 working days (about 18 days). On runs they usually work three days and have three days off duty. or in the same proportion During this off duty and vacation, their pay continues just as though they were work- ing. When they grow old they are retired with a pension. As Railway Postal Clerks are con- tinually traveling, they have an excellent P chance to see the country F. FRANKLIN 4 INSTITUTE OFFICE CLERKS / Dept. S-173 nd Carriers get $1700 the first year re; gular, and automatically increase $100 a year to $2100 4 ROCHESTER, er increase to $2300. They also have 15 days vacation. Examinations are frequently 4 N. Y. ity residence is unnecessary. GENERAL CLERK Rush to me, entirely free of (Open to men or women 18 or over “ charge (1) a full description of $1140 to $1860 a year. Pleasant clerical work in the various departments and the position checked below at Washington, D. C., and elsewhere throughout the country. ZO Send particulars % lling how to ge get , | y y appointment (3 ree copy of 32 WHAT WILL YoU EARN 5 YEARS FROM NOW ? - page iiestrated book. “U. 8. Govern re these conditions with your present or prospective condition, perhaps ; ment Positions and How to Get Them,” ig positions frequently, no chance in sight for PERMANENT employ- . with list of positions now obtainable frequently out of a position and the year’s average salary very low > > al C ($1900-$2700) YOU EARN $1900 EVERY YEAR? HAVE YOU ANY ASSUR- Raiway Postel Clerk $ $27 THAT A FEW YEARS FROM NOW YOU WILL GET $2700 nS Post Office Clerk ($1700-$2300) MORE A YEAR, EVERY YEAR? As City Mail Carrier ($1700-$2100) + Rural Mail Carrier $2100-$3300 GET FREE LIST OF POSITIONS . / Clerk in Government Offices $1140-$1860) 4 : out the coupon. Tear it off and mail it today 4 Prohibition Investigator $1800-$3000 ow, atonce. DO IT NOW—This investment f we cents for a postage stamp may result in <n ; 1 getting a U. 8S. Government Job 4 Name is no such thing as

4 (Not connected with U.S. Government

Address ‘yu se This Coupon Before You Mislay It—Write or Print Plainty.

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POPULAR MECHANICS ADVERTISING SECTION Viole Scientific, Painless Treat- ment Used by Doctors, Hospitals, Sanitariums —Now Offered to Every Home Thousands of men and women suffering from rheumatism, paralysis, neuritis, bronchitis, skin diseases, headaches, constipation, sprains, prostate trouble, goitre and many other ailments, even hay fever and asthma, have found quick relief, new health and vitality with this marvelous scientific invention Try it “Violettas i |} For Health—Beauty—Vigor Every home should have one. Saves hours, days, months of suffering No medicine Painless, pleasant treatment Violet Rays penetrate to every nerve affected. Also generates pure oxygen—wonderful for pulmonary troubles Simple, safe—any- one can use VIOLETTA Don't suffer pain and poor health when sy can now try VIOLETTA 10 days FRE Tells all > This Book poe = ae dis y ik Ia Tesla, the electrica brings this sterious curativ tains ma ast jing testin thousa is f satisfied users Send and r liberal trial offer VI-REX CO., Dept. 1231, 2304 Warren Avenue, Chicago SS VI-REX COMPANY | 2304 Warren Ave., Dept. 1231, Chicago. Please send me your free book on Violet Rays s | your 10-day free trial offer Young men needed », Davey Tree Expert Co. Interesting, vigorous outdoor work in a growing orga.- ization where merit wins advancement. Good starting wages. Permanent positions and a real future for men who make good. Our present field force of Davey Tree Experts cannot meet the increasing demand. So we are selecting now, to enter our employ, a few sturdy, clean young men, thorough Americans, single, between 20 and 30 years old, free to travel, industrious, with good prac tical education, and able to give good references. Write for qualification blank to serve in place of personal in terview. The‘Davey Tree Expert Co., Inc., 841 Federal Bldg., Kent, Ohio. earn Right at Marshall Get Into the eat, growing business— Aviation! Tremendous demand for well-trained pilots and ground men. Thrills—Romance—BIG P ! Personal instruction from men of tong experience »s you for Department of Commerce license in new training planes. Ground instruction in modern airplane factory. FREE Catalog — Send for finest, most complete school catalog ever is- IV sued. Answers all questions. Write today MARSHALL FLYING SCHOOL, 270-A North St. , Marshall, Mo Pocket Drawing Board , with book on mechanical dr T-square, triangles, etc All for 50c. VOCATIONAL PUBLISHING CO., Box 255, ST. LOUIS, MO. TELEGRAPH- RADIO Operators earn $150 to $350 month and up. Learn in Chic home. Chance to work while training. We furnish oper U. 8. Govt., Railroads, Com’! Cos., Broadcasting Stations and CHICAGO TELEGRAPH INSTITUTE, Dept. 1-12-7, 1338 So. Michigan Ave., CHICAG ANT WOR Earn $18 to 360 a week RETOUC pine ppotes. Men or women. se canvassing je teach y« and furnish WORKING 0 OUTFIT ziven with. each er roliment. Limited offer. Write t Artcraft Studios, Dept 50, 3900 Sheridan Rd., Chicago 1 c NEW SCIENTIFIC WONDER name . ee RAp BOYS: You ap a = CuRIO- ntly se thru Clothes, Wood, 4 Se FREE—PKG. ravio BIG Fu PICTURE FILMS. Takes pictures with out camera. “You'll like 'em.” 1 pkg. with each 25c¢ order. MARVEL MFG.CO. Dept. 31 NEW HAVEN, CONN. Je

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POPULAR MECHANICS ADVERTISING SECTION 3S pea@e@eeerereeF a@gaegeaenga gq Repai | Auto Factory Official - i OR HAVE A BUSINESS OF meee OWN irting r men le. XG 2 —~ Hi . nen Sune 4 — country but were n etti ng xy the Yr igh grade training means real countr; Tree b= : —] Bh B & , money that is earned by rez — sk a Thes ye are if 7 success for automobile men. Every men are going higher up, because when clean ay ci day we enroll men who have had _ they leave the “Michigan State,” they 0 and - from two to five years’ experience got—tnov —_ er ee bell in ape in automobile work—men who their han This combination Wr te were working in garages all over the big money. jai imn- sual 1 BUSINESS Wants Trained | MEN e have standing orders from auto manufacturers and their Managers, Superintendents—owners of their own sho *, to send them men who qualify for advancement as managing bus or truck transportation —or climbing executives. Good men are always wanted by big aviation, that great new branch of the motor industry . al ¢ hat you nt—real training—six t ight ire coming here daily to take the great MASTER , nsive r rk that putes wledge your URSE of Automobile rraining here at Detroit's big hands! That is the “Mic * Master Course le School, the ‘‘ Michigan State Small starts le pad t big : , trade Ne ¥ i ire aiming at big job aiming at big business! And 4}, en tart real strides towas Sy a jot Our graduates ‘a a few years ago now are Service penden ‘THOROUGH DETROIT — More ; Six to Eight Months’ Training Than Ever The Auto Center iding Auto Service, Electricity, Batteries, Machine Shop Mh eaaity maken So . J on the « a ’ g, Tires, Service Management, Business Course. C:; ita : es detailed outline of fll course It's free Write for Other Courses: Straight Auto Service Course, 10 yo we ss oid at OR: THIS WILL BRING YOU THE FACTS nd in manageme ro- Michigan State Automobile School, yen are showing the way! 312 Auto Bidg., Detroit, Michigan. A. G. Zeller, President I want to know about Detroit trait money , M | C 4 | GA N _ | Street Number or R. F. D pirManisc, state Automobile School ting on Top of ‘uv, orld To- 312 Auto Bidg., Detroit, Mich. 7 ee ee ee. I am interested in ( ) 30 weeks’ Master Course ( ) 12 weeks’ Auto Cours ( ) Home Study Course ( ) Aviation

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POPULAR MECHANICS ADVERTISING SECTION Tobacco Is Look at the facts square in the face, Mr. Tobacco User. tobacco is not hurting you. urting You You may think That is because you haven’t as yet, perhaps, felt the effects of the nicotine poison in YOUR system. For you know that nicotine, as absorbed into the system through smoking and chew- ing tobacco, is a slow working poison. 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. 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 for 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. Not the slightest shock to the nervous system. Your tobacco craving will usually begin to decrease after the very first dose—there’s no long waiting for results. 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. After finishing the treatment you have absolutely no desire to use tobacco again or to continue the use of the remedy. nerves and make you feel better in every way. Asingle trial will i Results Guaranteed #2:°"5r"icuSinine, arante We will refund every cent you ow 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 SEND Coupon for — oo effects of eee, to- gether with testimonial letters from Free Proof men allover the country telling how they have been absolutely freed from the tobacco habit by this simple a roof that Tobacco Redeemer will free you from the habit than the evidence we will gladly bome treatment. You could not ask for stronger send op reguest. Just mail the coupon—or a postal wil! do. NEWELL PHARMACAL CO. Dept. 300 Clayton Station St. Louis, Mo. It helps to quiet the NEWELL PHARMACAL CO. Dept. 300 Clayton Station St. Louis Please send, without obligating me in any Ww proof that Tobacco Redeemer will positively from the tobacco habitor my money will be refu IE FI ceakcintneincnieninns Ee ae your free booklet revarding the tobacco habit ane

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POPULAR MECHANICS ADVERTISING SECTION You are urgently needed to help repair 2 the one and a half million autos in Cal- Paul Briggs Earns fornia. Trained auto repair men are $4000 a Year also ne eded badly in every other state. | “! want to thank you ee . for the big part Na- [he rapidly increasing number of cars ] tional ‘yas played in means ~ prospe rity and big pay for auto | helping me to success men—t garages, tire shops, battery stations in auto work. I am You can be one of the highly paid now assistant sales Earn is fastest growing industry—if you get $4,000 ch: and ——_ er,” ,000 this year—which 4 ; the right training is more than I would While You Learn Million Dollar YOU CAN Bc National Automo- have made in three Free employment service. Spare gene ee tive special, prac- years at my former time jo help pay expenses Ay. aa ers for work.”"—Paul Briggs, while training All tools tical Shop Training Portland, Ore included. No extras. Send n u oO makes it easy for for big free illustrated you to become an cotates explaining how . y > National trains you for | Auto Expe rt Ina Mone — bieser pay. Learn the xX p e r z quarter century opportunities for you this great institu- in California. Mail cou- tion has trained : ge ee ee ee ee 16,000 men for bigger pay. It NATIONAL AUTOMOTIVE, Dept. 705, will help YOU make more 4006 Figueroa St., Los Angeles, Calif. money by giving you in- | Send me, absolutely free, your big illustrated catalog dividual instruction on re- of Automotive Opportunities | pairing Packards, 8, | Cadillacs, Fords, types of electrical equip- | ment, machine shop equip- | Address ° . | ment, etc. You learn every- | thing RIGHT at National A MRE. CEEEEEEE ETE ET es «ok eee A) DRAW CARTOONS YOUR TALENT Cartoonists earn from $50 to $250 per week—some even more. Remarkable Circle System of Drawing teaches you in half the usual time. Students from all parts of the world are enrolling for this exceptional instruction. Personal criticism service and up-to-the-minute instruction make it easy for National students to attain success. Send for interesting BOOKLET and SAMPLE LESSON PLATE explaining full details of the Course and what National students are accomplishing. No salesman will call. The National School of Cartooning, 623 Penton Bidg., Cleveland, Ohio ANY BOOK IN PRINT WO. ey. VAG i ae lL Delivered at your door We pay the (estane. Standard authors, fine editions, new bo ill The smartest, most interesting, entertaining biggest savings. Be sure to send postcard f and instructive Magazine in America! 10 Clarkson's catalog weeks for only 10c. Special introductory of- FREE Write for our great book catalog. This fer. Nomagazinelikeit. Full of important catalog is a short course in literature and facts, pictures and the best, most popular is so used by some of America’s leading universities; 300,000 book lovers buy fromit. Free if you write now fiction. For all members of the family. Send name, address and 10c immediately! D AVID seenee KSO N z mower THE PATHFINDER, Dept.k-#2 Washington, D.C. ot WIN 2 2 / Send Just your answer—it costs nothing! N Giv e No Money ; Draw eachline making asix-pointed 4 ew tos en 7 star with es in center ; Draw oe anes, cut ous the ad,send your name and address; that's all and ne ge tell you al] about this offer. It may mean your winning « Buick eden Gedan or prise, Nasb You Can Win $1800.00 Cash Sledan, Any winser ean have cash fogtend ot prise ee, Fir ast prise pines Be od worth 5 a 5 in to 1 prise, Boser You Sp net cick one cont. now; later x ever! Leola” 1. Markus of Ld pre, Cherreint 4tb Virginia, Minn., received $2,500.00 ch Andrews, Horse Creek, Wyo., received Buick Bedan. Bis list of former prise winners 625 6a gent you. Everyone doing good work is rewarded. Act quick. EXTRA for — os 500 N. DEARBORN ST. promptne: ” Tr. W: KELLY, ss total Soent 05,000.00. DEPT. 67 CHICAGO

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POPULAR MECHANICS ADVERTISING SECTION hYsekteialepetst| Typewriter Offer = gS SCUSTINS ETOS™ Ball Bearing Typewriter NEVER has there been such a typewriter bargain on as easy terms! A genuine Silent Baill Bearing L. C. Smith at a 40% savings ! Only the L C. Smith has all these features: Ball bearings (636 of them) at all points of wear. All the writing visible all the ime. Non-shift carriage. 2-color ribbon. All the latest operating conven- fences. Beautiful—re- newed. Guaranteed 5 Years Money cannot buy a better type- writer. U. S. Government bought 50,000. The choice of railroads, big corporations like the Standard Oil Co., etc., because of its exclusive ball bearing feature. Easiest running, longest wearing of typewriters. Send No Money! Just mail coupon. Without delay or red tape, typewriter will be shipped you. Use it 10 days. See how speedy and easy it runs—the perfect work it turns out. If not delighted, return at our expense. You'll want to keep it. You can, for down and $5 monthly. Now is the time to buy. $3 worth of extras free. nd coupon pow before offer is withdrawn, SMITH TYPEWRITER SALES CORP. 11C-360 E. Grand Ave., Chicago Ship me the L. C. Smith, F. O. B. Chicago. On arrival I'll de- posit $3 with express agent. If I keep machine, I'll send you $5 ® month until the $66.70 balance of $69.70 price is paid; the title to remain with you until then.1 am to have 10 days to try the type- writer. If 1 decide not to keep it, I will repack and return to express agent, who will return my $3. You are to give your standard 6-year guarantee. Name | FRI Over Wretched Old Age! Now, in your own home, you can us: new type of drugless gland stimulation « dorsed by noted doctors and sanitariums throughout the world. Thousands of me! some of them even as old as 90 years, have Am used the method successfully. —_— DO YOU SUFFER THESE DISTRESSING SYMPTOMS Prostate Trouble .... Weakness .... Nightly Risings . . . . Foot Pains? Do you know how a disordered prostate gland myriad of pains in legs, back, feet, disturbed sleep, lack of pep? Medical science says that about 2 men out of i past a certain age are victims. Often the trouble is « / with bladder or kidney disorder. If you are a sufferer 1 X should act immediately to learn the details of this new f , gland stimulation that has already proved a godsend to 8 “RY thousands of men. To many it has been the means of a i {| serious operations. Other men, some as old as 90 years t ) that through its use they are now living youthfully FREE Book—Mail Coupon This new method is described in an outspoken book v Many Men Are Old At 40." Send for this book and lear amazing new facts about old age. Simply fill out and mail t! today to The Electro Thermal Co. . [ 2176 Main Street, a . Steubenville, Ohio If you live west of the Rockies, mail your inquiry to The Electro Thermal Co., Suite 21-V, 303 Van Nuys Building, Los Angeles, Cali- fornia. | THE ELECTRO THERMAL CO. | 2176 Main St., Steubenville, Ohio | Please mail at once a FREE copy of your booklet Many Men Are Olc At 40,” and details about the new t ment. I am not obligated. | Name | Addres : 1 L City. : J

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POPULAR MECHANICS ADVERTISING SECTION 89 ick the{OByouwant! —we’ll help you land it! ¥%0w 1% examvie o who are going after better-paid jobs by systematic reading of these wonderful — books. Only 15 minutes a day will do the trick. Written so you can understand every fact instantly, even if your Bullding schooling is limited. is) P al iT) 59 Trythe REFERENCE Way! —no studying, no memorizing The JIFFY INDEX places the m= answer to any problem right at your “¥ finger tips. That's better than trying . -4 to keep it all in your head. Without lessons 4 or examinations you can grad- S » ually acquire the expert knowledge : which pays top salaries. Big opportunities today in Electrical, Auto, Building and Manufacturing in- dustries for men who take the trouble to really learn the work. r Send NoMoney A Year’s Membership FREE! Civil Engineering e of consulting Engi- rican Technical So- service has often n promotion and in- Free with books, * Z. Pay-raising Books SENT FREE! Nay” inadvance. If not wanted after 15 days’ free 1arges collect and you owe us nothing. But o keep them pay only $2, then the balance at the rate of American Technical Society, Dept. X-919, Drexel Ave. & 58th St., Chicago Send free for 15 days’ use: nth. Coupon brings any set you wish name of set Mail Coupon—Send No Money—Order by Number I will pay the few conte delivery charges, and have the right to return 0ke harges collec n which case owe you nothing. kB A efer t keep therm I will pay - after 16 days and the balance tising pr at the rate of only $3 a month. Please rok FRE E SHIP as offered above 4000 on 32,000 illustrations Idir 2500 pages, 2000 blueprints, et 3900 pages, 3000 illustrations 2006 charts, diagrams, et adver- . PM 7 4 - vol. editior {EMBER 2400 pages s| Law, new 9 vol. set, richly illustrated 2300 pager 2 a » exper*s, 6 vols Name 78 pages, 1000 blueprints, et «,7 l 3300 pages, 2500 illustrations, new Del complete in 13 big volur Insurance volumes, 1500 5 ating, Ventilating, 4 volumes, 1450 pages. 1400 illustrations Management, 7 volumes, 1810 pages, flexible American Morocco American Technical Society sue edition. 2 s, 6000 pages plus 24 case textes re. ges, green & black binding... Address Employed by Dept. X-919, Drexel Ave. & 58th Street, CHICAGO pinta Get $1900 to$2700a Year .-’ | EASY WORK -~-LONG VACATIONS o* Arthar R. Why work hard for small pay? Uncle Sam offers you a fine position as Patterson, Civil a@ Railway Postal Clerk. Travel on fast trains sorting mail. Travel expenses paid. $1900 Service Expert a year TO START. $100 RAISE EVERY YEAR until you reach TOP PAY. of Patterson Schoo! FREE Information About These Fine Jobs Pa Dept. yee Ietefual Revence, Departasetat Y aalify for « position as a Railway Postal Clerk or in Custome, of ochester, M. Y. Internal Revenue, Departmental , migratic Postmaster stofiee, and Rural branches eo” Sir: Send me without charge your He trained th ds now in Civil Servi e. Writ for FREE Sook Tells how Mr. o* catalog describing Railway Postal Clerk Patterson cos can you to pass exams. Also read his Money Back Agreement. ther Civil Service positions coupon now Mail and « - RTHUR R. pranses, PA PATTERSON SCHOOL, Dept. 812 needs of 2 i or" Civil Service Expert , Wisner Bidg., Rochester, ".Y. Show Card Lettering the very course you need if you want to get a good paying position as a Show Card Letterer or Sign Letterer, or 4 business of your own. This course is complete and practical and especially arranged to meet the t who studies at home. It was written by E. L. Koller, Principa) of the International Schoo) of Art, the American Federation of Arts, of Craftsmen. H. L. Wood, a clerk, made more than $700 “on the side” before he had completed this course. Harry Lord writes that he has more than a doubled his salary. William Whitman is a“ earning three times as much as he | did before enrolling with the Dept. 5694-E, Scranton, Penna. Without cost or obligation, please — me ] International School of Art. full details of your home-study course “ a SHOW CARD LETTERING member of and The National Society a lS ee oF. ART Associated with the International Correspondence Schools Mail Coupon for Free Booklet - oe Address | “| ————— Name........

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POPULAR MECHANICS ADVERTISING SECTION see GIVING AWAY Strenotn 5-CABLE EXERCISER with ove yeas “STRENGTH MAGAZINE” AT ITS REGULAR PRICE OF $2.50 We (the Milo Publishing Co.) believe that we are not ex aggerating the least bit when we say that, ‘‘Never before was so much value given for the small sum of $2.50 in the physical training field.’" You simply cannot equal it and consequently you cannot afford to miss it 12 Big Monthly Issues of .“Strength” and This Powerful 5-Cable Exerciser Complete with Instructions ALL MAILING CHARGES PAID BY US A Strong 5-Cable er Uke this, with Couses “STRENGTH” is the HEALTH and STRENGTH SEEKERS’ MAGAZINE If you want to become healthy, strong and shapely or remain healthy, strong and shapely, you need “‘Strength”"’ and with this Exerciser and course the value is doubled It's an opportunity of a lifetime to get these two big muscle developing mediums at the price of only $2.50. There are no extra charges not even for postage. “Strength” contains articles each month on muscle strength and health culture by men who are experts—Men who write from experience and not from theory—Men who have the strength and physiques that prove their teachings Also Sports articles on wrestling, boxing, swimming and all other sports are included and written by practical writers. — _—— , Whether you are al- ways ailing or not you will profit by and enjoy “Strength” each month You Know This isa Big Offer Just. think of 12 big isstres of “Strength” delivered right to your door each month for less than the news- stand price Add to that this strong 5- strand exerciser and course and what have you got?—the best offer of its kind ever brought before youl eyes are not asked to even the postage the 12 magazines or ex- ercisers. TEAR THIS COUPON NOW and GET IT OFF THE MILO PUBLISHING CO. P.M. 12-27 2747 N. Palethorp St., Philadelphia, Pa. Gentlemen Enclosed you will find $2.50 for which please enter my name f i r subscription to your Strength Magazine” and send m ree extra charge, whatsoever, the complete 5-STRA* ISER and COURSI Name QUIT TOBACCO No man or woman can escape the harmfu | effects of ccbente, Don’t try to banish unaided the hold tobacco has upon you, Join the thousands of a ate tobacco users that hav found it easy toquit withthe aid of the Keeley Treatment TREATMENT KEELEY, 27°": Tobacco Habit Quickly banishes all craving for tobacco. Write today for Free Book telling how toquickly Free yourself from the tobacco habit and our Money Back Guarantee. THE KEELEY INSTITUTE Dept. A904 Dwight, Mlinois | AMERICAN POULTRY JOURNAL OLDEST, LARGEST AND BEST. EST. 1874 1 Year 25c &: 5 Years Pt Conse Averages over 100 pages per issue—tells how to feed, house and breed; how to secure high egg produc- tic my! how to hatch and rear poultry successfully year. 5 years $1.00 AMERICAN POULTRY JOURNAL, 14-536 S. Clark St. CHICAGO FREE Book nono reee Ts KS Gives Money Making Secrete of Poult ing. Tells how to hatch, care for and fe " until fully grown®Gi 7es Bia: of boy. and Brooder Houses ‘bes Miller’ Oh mS i CUBATORS with Patented end Coal Burning BROODE oe Chicks — BARGAIN PRIC ES. . W. MILLER CO., Box 12, Rockford, til. RAISE BELGIAN HARES NEW ZEALAND REDS—Chinchillas—Flemish Giants MAKE BIG MONEY—We supply stock and pay you following prices for all Pm raise elgian Hares $2 each ew Zealands $3 each—Chinchillas $4 each $5 each. 32-page illustrated book, copy of Fur Farmi magazine, tella how to raise skunk mink, fox, etc., for big profita, all for 10c. Address OUTDOOR ENTERPRISE CO., Box 25, Holmes Park, .Mo. | SQUAB BOOK FREE Breed squabs and make money. Sold | millions for more than chickens. Write at once for free 40-page book beautifully printed colors telling how to do it ou will be sur pris PLYMOUTH ROCK SQUAB co. 634 H Street Melrose Highlands, Mass FOY’S BIG BOOK, in Colors A complete guide to successful pester and Squab Raising. Low prices on CHICKS, Breeding Stock and PIGEONS. Write Today! FREE! FRANK FOY, Box 18, Clinton, lowa | OF Ga roe ceieeamiics secret getting gitar ege3. All styles. 180 fiusirali Ver Basket. of est INLAND POULTRY JOURNAL, Dept. 514 tadionapetie,ind. COYOTE, FOX and SKU NK EXTE RMINATOR CAPSULES. ‘( coyotes one night. Brought $121.50 Free Circular. Free Formulas and Instructions GEORGE EDWARDS, Livingston, Montana $10.00 PER MONTH BUYS Fibre-Lite Limbs NEXT TO NATURE. BRACES MADE TO ORDER. AGENTS WANTED. FREE WORMAN co. 252-P oa ig AVE FIBRE SAMPLE. MINNEAPOLIS, MINN DEAFNESS IS MISERY Multitudes of persons with defeccive hearing and Head Noises enjoy conversation, go to Thea- treand Church because they useLeonard Invisible Antiseptic Ear Drums. Tiny Megaphones fitting in the Ear entirely out of sight. No wires, batteriesor head piece. They are Unseen Com- forts and inexpensive. Write for booklet andswornstatement of the inventor who was himself deaf. A. 0. LEONARD, Inc., Suite 699, 70 5th Ave., New York “uM Him ¥¢ Hou all dire

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POPULAR MECHANICS ADVER‘ISING SECTION Learn Auto Repairing he Sure, Easy Way McSweeny training methods are simple, practical, effective —the work-while-you-learn system. No books, dry lectures or mere theories. You are shown how to do everything and you know $75t09125 WHY you doit. When you have completed the McSweeny course you know the “‘ins and outs” of every make of pleasure car, truck and tractor. W You have the necessary knowledge and training to fit you to open a shop of your own or accept a responsible position. McSweeny has trained thousands of successful auto mechanics and now offers you the complete es 4 ‘ ‘ ie! course at a specially attractive figure—not by correspondence, but by a sound method of RNAL “ it 36 ee teaching that makes you an auto and tractor mechanic in only eight short weeks cm | Ae a Complete Course in 8 Weeks pean ‘ Don't let lack of money or mechanical experience hold you back. Most of the men at the essfully a McSweeny Schools have no more money than you have. And age makes no difference. My . P é simple, practical, easy-to-learn methods will make you a competent auto mechanic in eight HICAGO . "ae 4 ‘ Mas weeks, no matter whether you are 16 or 60. You work with real tools on real equipment ee ans x 4 ; y You DO the jobs you will have to do after you complete the course McSweeny men know 3 ‘ Cl their tasks thoroughly—that's why they are in such big demand , Plenty of Good Jobs Waiting— or Start a Business of Your Own When you complete the"McSweeny course you’will be competent to handle any and’all kinds of auto and tractor repairing. You can start a garage and repair shop of your own, or accept one of the splendid jobs that are just begging for skillfully trained men—McSweeny men Good auto mechanics make $50, $60, $75 a week on up to $100 a week, and more D. M. Collins, West Va., started as manager of a garage at $300 a month after completing the McSweeny course George Smith of West Alexandria owns an auto agency and repair shop and makes $200 a sb Giants week and more tract, also se skunk a C. E. Gillespie earns a nice fat salary as supervisor of a large fleet of esa k trucks and tractors for the State Highway Commission . Mo. Other McSweeny-trained men are doing as well and better. “MAC” ™ — Thousands have started on the road to success through the ; McSweeny Schools Himself ~ vice ys f 7 s America’s Foremost Trainers of Auto Begin Any Time and Tractor Mechanics So great is the demand for McSweeny- trained men that both schools are in YOUR LAST CHANCE TO GET | oni ois term start any tine—come any time—come ELECTRICAL COURSE tomorrow, if you like. Right now is the best time to begin, because owing to the popularity of closed cars, repair work is about as heavy in winter as in spring and summer Don't lose any more time. Fit yourself for a big job at once. Write immediately for my special fall and winter OF EXTRA COST tuition offer which includes House wiring, armature winding, motor work and all gencral electrical training, both aiternating and | FR, RR, Fare and Board While Learning sitively the last time I am going to offer the Your railroad fare to Cincinnati or Cleveland and your board electricity to those who enroll in the Auto and included in this special offer. One lump sum covers everything School without extra cost. After January First, No extras to buy—no books to pay for. If you act promptly, I e electrical course will cost extra—at least $200.00 will include a course in electricity absolutely without extra cost So you can make a big saving by enrolling at Write me today. Get my big, complete, beautifully illustrated the Auto and Tractor repair business NOW auto book. It’s FREE. Just send me your itisfled with a small pay job. If you're making name and address in the coupon below $50 a week, you can afford to quit any job you've oe seceeee rush to the nearest McSweeny School. The n auto and tractor repairing looks bigger and Z McSweeny Auto, Tractor and Electrical Schools, every day Don't wait until all the good jobs Dept. 11-T-1, Cincinnati, O. Cleveland, O. Get started now while you have unlimited Without cost or obligation, send me your big FREI for big earnings. ; book on Autos; also, full details of your big offer includ Mac’s Shop Plan Makes g ‘ ing R. R. Fare and Board Paid, and FREE electrical the Big Pay Man. er Mc SWEENY tnd ELECTNicaL SCHOOLS Dept. 11-T-1 CINCINNATI, OHIO CLEVELAND, OHIO yctions } Town State Qt teeeeeees

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POPULAR MECHANICS ADVERTISING SECTION ; | Edgar E. LaParle, Chief Pilot~ - will teach YOU the many HE knows about flying. 30 a lessons in the air is only part of ing He teaches you to be bot! Mechanic Send for FULL I TION Write Edgar E. LaP Pilot. Chicago Aeronautical Service, Ing, 608 So. Dearborn St. Chicago, ill. Deafness Perfect hearing is now being po. stored in all cases of deafness caused Catarrhal troubles, Relaxed or Syn| Drums, Thickened Drums, Roaring or mi issit Sounds, Perforated, Wholly or Partially De. stroyed Drums, Discharge from the Es ars, ety Wilson Seenenena Sense Ear Drums require no medicine but effectively replace what is la defective in the natural ear drums. They are simp which the wearer easily fits into the ears where they are V Soft, safe and comfortable. Writ for 168-page book on deafness ¢ Free Book full partioulars and many testim The hearing of thousands of g on Deafness | users “fas “been ‘restored "| ‘little wireless phones for things tual flying r train.

WILSON EAR DRUM CO., Incorporated 722 Todd Bldg. LOUISVILLE, Ky. : : 1) How to Straighten Bow and Knock-kneed Legs! With Violet a Ve on Fy imprare. Your Forsonel aprearance 27 pang the m Ny yatent “ Lim-Straitner 18. Corrects now e ° ° 30w and Knock-kneed legs safely, quickly and Ozone Medical Electricity permanently at home. No costly operation or dis- comfort Is worn at night Easy to adjust

| = result will save you soon from further humiliatio The Four Greatest Curative Powers and will improve your personal appearance 100 pe ° ' cent. Write today fo yrighted Physiol land Anat Generated by This book and experience of others without ae le on ad for postage. Great New Invention! See ne Sree SER © Eleo Health Generators at last ° are ready for you! If you want r e e oO u r a n more health—greater power to en- joy the pleasures and delights abouwyou, of f more beauty is your of pimples, boils, etc., with KL E E RS SKIN! desire— write! Ask for the book on these inventions which has just fies the blo« rd and rids it of the poisons th: Lt ¢ ause been prepared. It will be sent to | skin disorders. KLEERSKIN is wonderful also for treating you without cost. It tells you | ecarbuncles, blackheads and similar skin infections. KL} ER = ay he may Wy oy = | SKIN is made after the formula of a celebrated Gert >é r e lethargy & | er ° ° hopelessness et bad health and sician who, after many experiments and _ clinical trials, h weakness behind forever. Re-vitalize your- proved it to be the remedy par excellence. Write today Medeo re ee ey: Be wholly alive. Medicine Co., 503 Ridge Bldg., Kansas City, Mo. sen s What Elco Users Say— What _ Tomorrow’ s Weather Be? his marvelous weather prophet fore- jE the weather 8 to 24 hours in PAM, advance. Never fails. Scientific, and : % oe) accurate. Warns against coming sala, Electric Health ANS frost, storm o change. Invalu- F } ~ ableto it growers, gardeners, Generators + Siab 5 farmers, Useful in every home Built just like the picture. Size 64x erfect miniature cottage Boy a girl appear when weather is to be fine. Ok witch eomes out to warn of storm orchange. Beauti- ful, valuable, useful, instructive. Send25e for years subscription to 7 our Monthly publication Everyday “s = Life and Te extra or $1.00 in all and we will send our publi- 2° Book NOW! cation one year and Weather Prophet, all for $1.00. Mi AT L ‘C OU PO N\a EVERYDAY LIFE, 91 W. P.,337 W. Madison St., Chicago for Eon eres DON’T WEAR a i a ae a A TRUSS Le ft » a 8 ot . t . 4 , rr , te 7 i at to drag through it. | So do not BE COMFORTABLE — coup hat will bring the Of th . Wear the Brooks Appliance, the etree modern scientific invention which baesenseceeeees ~Lindeteom & I iM gives rupture sufferers immediate re- s 30 West Lake St. Dept. 13-59 Chicago lief. It has no obnoxious springs or fe A pee pads. Automatic Air Cushions bind 8 Please sem id me y r free book, *‘Healt! Power—Beauty”’ and and draw together the broken parts. full information of your 10-day Free Trial Offer. Nosalvesor plasters. Durable. Cheap Sent on trial to prove its worth. Be- R. C. E. BROOKS ware of imitations. Never sold in stores nor by agent Every appliance made to special order and sent dir¢ from Marshall. Full information and booklet sent f in plain, sealed envelope BROOKS APPLIANCE CO., 107A State St., MARSHALL, MICt

< iddre SSeeeeteeeeeeaee

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Pilot~ things ial flying Ur train. Pi tot and POR MA. » Chief ue, Ine, cago, Ill, It puri- it Cause | treating K LEER man phy- Ss has Medco POPULAR MECHANICS ADVERTISING SECTION 93 I Will Train You at Home tofille,a Big Tay Job! It’s a shame for you to earn $15 or $20 or $30 a week, when in the same six days as an Electrical Expert you could make $70 to $200 and do it easier—not work half so hard. Why then remain in the small-pay game, in a line of work that offers no chance, no big promotion, no big income? Fit Look What These Cooke Trained Men areEarning Makes $700 in 24 Days in Radio **Thanks to your interest- ing Course I made over $700 in 24 days in Radio. Of course, thisis alittle above the average but I run from $10 to $40 clear profit every day; you can see what your training has done for me.’”’ FRED G. McNABB, 848 Spring St.,Atlanta,Ga. $70 to$s0a Week for Jacquot **Now I am specializing In autoelectricity and battery work and make from $70 to $80a week and am just getting started. I don’t be- m lieve there is another school in the world — ours. Your les- ons are & joy to study."’ ROBE RT J JACQUOT, 2005 Colorado Ave. ° Colorado Springs, Cole, $20 a Day for Schreck **‘Use my name asa refer- ence and depend on me as a booster. The biggest thing l ever did was answer your advertisement. I am aver- @ aging better than $500 a month from my own busi- ness now. I used to make $18 a week.”’ A. SCHRECK, Phoenix, Ariz. **When I began with your was just a common laborer, going from one job to another, working for any- thingI could get, and that wasn’t much. Now my sal- ary is $3,500 a year and the Company furnishes me with an automobile.”’ C. O. BECKETT, 108 Maple Heights, New Lexington, Ohio | Me Cooke Trained Man is the Big Pay Me fan a yourself for a real job in the great electrical industry. I'll show you how. L. L. COOKE Chief Engineer Be an Electrical Expert Earn $3,500 to $10,000 a Year Today eventhe ordinary Electrician —the “screw driver” kind—is mak- ing money—big money. But it’s the trained man—the man who knows the whys and wherefores of Electri- city—the Electrical Expert—who is icked out to “‘boss” the ordinary lectricians—to boss the Big Jobs— the jobs that pay $3,500 to $10,000 a Year, ,Get in line for oneof these “Big Jobs.” Start by enrolling now for my easily learned,quickly grasped, right- up-to-the-minute, Spare-Time Home- Study Course in Practical Electricity. Age or ay of Experience No ww back You don’t sateen to be a College Man; you don’t have to be a High School Graduate. As Chief Engineer of the Chicago Engineering Works, I know exactly the kind of training you need and I will give you that training. My Course in Electricity is simple, thor- ough and complete and offers every man, regardless of age, education or ey experience, the chance to come, in a very ort time, an “Electrical Expert,” able to make from $70 to $200 a week. No ExtraChargefor Electricat Working Outfit With me, you do practical work—at home. You start right in after your first few lessons to work at your pro- fession in the regular way and make extra money in your spare time. For this you need tools, and I give them to you—5 big complete working outfits, with tools, measuring instruments and a real elec- tric motor. FREE a Course wp te tt net Your Satisfaction Guaranteed So sure am I that you can learn Elec- tricity—so sure am [I that after studying with me, you, too, can get into the “big money’”’ class in Electric sof work, that I will guarantee under bond to return every single peeay aid me in tuition, if, when you have inished my Course, you are not satisfied it was the best investment you ever made. And back of me in my guarantee, stands the Chi- cago Engineering Works, Inc., a two million dollar institution, thus assuring to every stu dent enrolled, not only a wonderful training in Electricity, but an unsurpassed Student Service as well. Get Started Now — MailCoupon I want to send you my Electrical Book and Proof Lessons, both Free. These cost you nothing and you'll enjoy them. Make the start today for a bright future in Electricity Send in Coupon—NOW. L. L. COOKE, Chief Instruction Engineer L. L. COOKE SCHOOL OF ELECTRICITY Dept. ,_ 2150 Lawrence $19 Av.Chicago L.L.COOKE, _ The Man Dept. 519 Who Makes 2150 Lawrence “Big-Pay’ Ave., Chicago Men Send me at once without obliga- tion your big illustrated book and complete details « our Home Stu uding . rvice offer rvice offers ®& outfit and employment s Occupation

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POPULAR MECHANICS ADVERTISING SECTION A RAILWAY B DE TRArHC ISPECTOR _ 1, ESTATE EAL Specialist Learn my amazingly successful system—right at } spare time. Let me train you for real success you in touch with big business. Let me do for you done for other wide-awake men and women. D. H. ( ““Made $630 in one week be fore I was half through yo PLUS Mrs. J. H. Hastings says: “‘Have sold two lots, receiving tv EXPENSES and forty-eight dollars in commissions. Have fine bu Our students never up.” M. I. Stokes says: “Made $900 in three mon worry about a posi- spare time.” Send your name and address at once for n tion as one will be book, “How to Become a Real Estate Specialist,” giving offered them within a about my remarkable Home-Study Course, my Free Bu few days after com- and positive proof of big success. Address DIRE pleting the Traffic In- 44-NN, American Business Builders, Inc., 18 East NO spection course. You New York, N. Y : “ ‘$ HUNTING FOR A POSITION | “‘A°t at $120 or more aNeY. per month plus ex- AFTER COMPLETING Sonees. Our cenwact YOUR TRAINING shows why you take Read what Ed. Grogan says— no risk Dear Mr. Jarrell: As o Railway Traffic In- You will recall that I took a Corre- spector ag practically spondence Course in your school and ax aaa Gibeee dae was placed in a position a year ago minu report | am not going to try to say what the offcials, ar School and the Employment Depart- — It ment has done for me, but it fs 80 itdoor work with regular 1uch beyond my expectation that it would sound to a reader of this letter Hundreds of Satis- beyond reason, but I was placed in a D fied | Gradustes position at $110 per month, was raised we Pagge! pretend meted to $135 at the expiration of one month, and am now getting $150 per month and li ke the work fine ) are my superiors to be pleasant * y are

ari y ‘am indeed grat bh , a he may tt ap lene cepelly eeonmagenne contr reeing to re . Ex isting uishin, I ye 1 < your m D ney w uamarine bee ideal cones iD ring and offered after gradua- av nd we in the most perfect ¢ t jon

ben ring arrives, depocit | $i 00 w th man and pay balance in easy i ‘ TRUST x30. No a tape! N asked for. Simply tellus which ring to send and enclo STANDARD BUSINESS TRAINING INSTITUTE with ring size. Sati factio nteed. ( "Canada, coah wrth créer jer Division 2 Buftalo, New York ‘ [.......... a aan nn aie ie on |

3 MECHANICS i I I ! I I I 1 | cs - ‘NEEDED TO , \B\ \— ! 1 EVERY FLYER : 7 Thorough AiR | — Training At Detroit's \ : Asad ge ee | i My Hg l ence backs thie Air | I I I \ ie complete, int overs GROUND Ww Endorsed by Aviation Leaders Eddie Stinson (pre- | ane HOTOG rd un mier flyer and Pres- / of Commerce ex ident of Stinson - you practical — ¢ AircraftCorporation VA , f ing for actual o ¢ of Detroit) and other leaders, a groundwork N and dying ? ee ~ — Aviation is ready,—the miraclesof success £ og flict ——s aon , — 1 Get the made in the auto business by men who 12 1ey say the need of trained men is #” Facts TODAY looked ahead, are now about to be repeated great and growing bigger fast. a in the new, great Business of Aviation. Aviation is just entering on its stage of busi- A. @. Zeller, President Pilots are needed, ground men are needed, ness success. Marvelous futures and profits Michigan State Aviation Seb skilled mechanics. transport managers, etc pone p Foe —~ wae ere this thrilling busi- - 8712 Woodward Ave., Detrol, 1 Come to Detroit the Aviation Center and get the ness thoroughly } ‘ training for success and big money in this new business Write today for complete details of a ont me et ee ees r Learn at, the be te higna Ly ate wore poy ——_ Opportunities in Aviation and Po Detroit about work or flying. of both. Qualifies you to pase govern- Practical “Michigan State” gy sic ment examinations training. eo MICHIGAN STATE AVIATION SCHOOL Affiliated with Michigan State Automobile School ee Established 17 Years A.G. ZELLER, Pres. 3712 Woodward Ave., Detroit, Mich ee ee ee ee ee ee ee ee ee ee ee ee ee es es City and State.. Name Street and No. or R. F. D

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POPULAR MECHANICS ADVERTISING SECTION Drive Screws the Quick, Easy Way SELB RRREEES in make . oa nkee No 130-4 Up or Down is the same to Quick-Return One-handed you can quickly world-famous ‘‘Yankee”’ SpiralS ew- drive (or draw) screws in tight Spiral Screw-driver. driver. place Ss. use “YANKEE” No. 130-A Wherever there is a hard Right-hand Ratchet, Left-hand screw -dri 1V ing job — that’s Ratchet and Rigid. Three sizes of where you want “Yankee” bits. No. 130-A, standard size; Quick-Return Spiral Ratchet awe ees | menry eae oe Screw-driver No. 130-A. For, 297," 0" Pattern. “+ saggy iriv; Quick- Return feature, No. 30-A, any position, driving No. 31-A, No screws 1S surprisingly easy and speedy. “YANKEE”’ he live spring in handle keeps Christmas Suggestions in screw slot, and brings No. 1530—Ratchet Hand Drill . 35s “ a _— = ee ee ee ee ee ee ee ee ee ee ee ee ee ee one u's lle back ready for the next No. 1435—Two speed Hand Drill h—without a_second’s loss. No. 41— -Automatic Push Dri i lust yush! The Spring and No. 1555—Ratchet Breast Dril ‘ Y , ” c ‘ral d , " I . ek fey No. 99 or 95—Plain S co A , mkee Spiral do the Work for No. 1992—Vise with Swivel Base you and save your time. The No. 2100—Ratchet Bit Brace iz react prevents barked No. 10 and 15—Ratchet Screw-driver kles. No. 130-A—Spiral rivel ¢ . . r “re; ? Dealers Everywhere Sell ‘*Yankee’’ Tools t the “Yankee” on the tool you buy means the utmost in quality, ODAY efficiency and durability. ton Seber ‘orru Bros, Mre. Co, Philadelphia, l ~olt, Mict FREE “Yankee” Tool Book ior all lovers of fine tools. Write for it “YANKEE TOOLS Make Beller Mechanics

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POPULAR MECHANICS ADVERTISING SECTION How many are 421,000 stockholders? 1n Advertisement of the American Telephone and Telegraph Company On OcrosBer 15th, American q Telephone and Telegraph Com- pany checks representing the to its That is the 152d dividend were mailed 421,000 stockholders. largest number of stockholders of any company in the world. The American Telephone and Tele- graph Company is owned by a great investment democracy. Its dividend checks are cashed at banks in every state in the Union, by people representing all trades, stations and professions. No institution is more nation ally or publicly owned than the American Telephone and Telegraph Company, which in turn owns more than 91% of the common stock of the operating companies of the Bell national System. The aver age holding is 26 shares, and no on« person owns as much as 1% of thi total stock. The Bell System was developed in the interest of telephone users and is owned by the public that it serves.

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POPULAR MECHANICS ADVERTISING SECTION This wonderful new SPEEDMOBILE makes you a faster racer than you ever dreamed! OU’LL leave the bunch way Send for FREE racing poster behind when you step into this speedy little racer. The Speedmobile hoy is always the envy of the neighborhood. This shiny red speedster has real class. It is built just like an honest-to-goodness racer, slung low, balloon tires and everything. Not only is it a winner as aracer . ; but it coasts too. Simply keep the race vourself. Childre ns Vehicl pedals still and let er go! Hasthe Corporation, Dept. F-1, East famous patented ‘‘ Speedorcoast ‘ lempleton, Mass sprocket, that speeds ahead, re- verses, brakes and coasts. THIS poster tells you all about famous races and drivers; about the ‘Sunbeam, ”’ the fastest car in the world; and other interesting things about automobiles. Send the coupon now for your free poster. It will tell vou how to conduct a thrilling Speedmobile CHAIN DRIVE SAFE because under control like f : ae Tu Speedmobile has double pre- ike Jamous racing cars cautions for safety. Besides an — = A \ Gay — timprovement ever made in boys’ »biles. It has a cl nsprocket hke a s racing cars with bicycle-type because his legs aren't enclosed r cushioned ped neh t bv side board The chain is guarded too, so he can’t possibly catch his legs or clothes in it CHAINQ@DDRIVE Hepp fs sss covros Zari ; : Bs | om a v's Ten I na ‘i . | \ A FasTEST i ‘ TE guntor BUILT” . 1 ‘ (~» ew Speedmobile chain drive is the emergency brake the bov’s feet ¢é a) Wi . >} are always free to act as brakes | West of the \ Mississippi $21.50 th this new snay le for boys fron

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116 POPULAR MECHANICS ADVERTISING SECTION LONEL the father\ Lionel Operating Lionel Station No. 124. Dump Car Oxe of many styles and No. 218. Sizes. Lionel Electrically Controlled = Switch. Nos. 222 and 012. a YOU'RE the Traffic Manager, sitting at the Lionel Switch Tower, your hand at the control levers. Dad’s down the line—he’s the Section Boss. Everything is ready —l/et’s go!...Touch the control lever in the Switch Tower and, resto!—down the gleaming Rail goes your beautiful Lionel Train, Sao ee its powerful Super-Motor Locomotive pulling life-like Passenger ¥ Cars, Diner, or as many of the twenty-nine different Lionel Freight Cars as you choose. There she goes—over the Bridge! Watch the Crossing Gates automatically raise and lower as the Train whizzes by. And watch that Lionel Train- Control -Semaphor: at the far end! Red light shines and halts the Train —then flashes green after a few moments and the Train is on its way again. It’s marvelous! The crossing b > ringsas your Limited spec m a ~ y ak TT] lo... ff ? bythe Station! Look! — there’s th« Switcl i nei Crossing Gates Nos. 77 and 077. ae j / j CE Send for our Free Model Railroad Planning Book! j ® See for yourself just how wonderful the Lionel SS Railroad System really is! Our book is the most elabo- = rate ever published. In full colors it shows the great variety of Lionel Trains and Equipment. It describes the Lionel 100% Electrically Con- trolled Railroads for ‘0’ Gauge and “‘Lionel Standard” Track. This great 46-page book shows the supreme quality and built-in excellence of all Lionel Products. Sets from $5.75 to $300. Send for the book today “STANDARD OF THE WORLD SINCE 1900” - ONEL* 2 TRAIN “MULTIVOLT” TRANSFORMERS ae

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POPULAR MECHANICS ADVERTISING SECTION 117 and Son ‘Railroad — —real enough for a man to enjoy—simple enough for a boy tO jm operate. vs ~ _ Ww Lionel Switch aad — Tower No .437. ra ‘ ng atch ‘rain ! : - ‘ Lionel All-Steel ra Back in the Tunnel No. 120L ‘cain Switch Toweryoutouch satieieae ones another lever—the Track-Switch ‘Tr’s is thrown, the Train glides into a Siding— bel touch another lever and the Train stops. But es —wait! You are building a freight yard down ne e line. You call to Dad—he couples on the new Lionel ' Derrick Car with operating boom and tackle, and the new operat- un ing Dump Car filled with sand! Again you touch a lever—your Train backs ACC out onto the main line. Throw the Switch again and she's off on her way! Just think! You can do all this at any distance from the track...It’s amazing —almost magical—the way a Lionel Railroad operates. So real!—a// the Equipment, Locomotives, Cars, Stations, Semaphores—everything is real! rhe only difference between Lionel Trains and real trains is the size. - Lionel Products demonstrated at the leading department stores, , hardware, electrical, sporting goods and furniture stores. THE LIONEL CORPORATION yy Dept. G r =~ 15-19 E.26thSt., New York, N.Y. US . m SN pS ‘. fp vy on- N page uct day J 4s Cp yd Lionel Train-Control-Semapbore Nos. 82 and O82

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118 POPULAR MECHANICS ADVERTISING SECTION Set No. 904 12 tools—oak cabinet Price $15.00 The three most important Xmas questions They are: (1) What gift gives the most lasting pleasure? (2) What gift offers most for the money? (3) What gift is offered at a range of prices that permits selection according to the amount you wish to spend? These three questions are answered by Stanley Tool Sets. Stanley Tools are known the country over as the Set No. 907—7 tools in cardboard box— Price $5.00. This set includes plans for making a tool cabinet. STANLEY eu010) 5. - es most complete line of fine wood- working tools. Stanley Catalog Sd335 shows 18 Tool Assortments costing from $5 to $95. Your hardware dealer has these sets or can easily get them. Ask him for Catalogs Sd35 and Sd50. If he cannot supply you write us for free copies. The Stanley Works, New Britain, Connecticut. Set No. 902—20 tools—oak chest Price $25.00 STANLEY TOOLS

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POPULAR MECHANICS ADVERTISING SECTION ~ » CORON 1 ¢ Me Wwe" a delightful Christmas gift! All metal parts not finished in Duco are Corona, the finest portable type eithe r brightly kel r gviven a satin ter money can buy, finished in durable finish. No care has been spared to make » to blend inconspicuously with the this the most r scheme of your room, or to lend a built \W rite us I ie ished (oronas ad spot of contrasting color [here is a color for every taste red, n | } ! maroon, blue, cream, lavender. venient, stop in atthe ne: LC Smith & Corona Typewriters Inc

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120 POPULAR MECHANICS ADVERTISING SECTION As lean and as fleet as a grey- hound— the Sargent Auto-Set THERE’s not one gram of excess weight on the Sargent Auto-Set Bench Plane. It’s the ideal tool for the home or school work bench. There’s an exclusive feature which permits the chromium steel cutter to be removed, sharpened, and put back in a jiffy—right where it was, without disturbing the original ad- justment. This feature is a time and trouble saver, as any of the many carpenters and wood-workers who use the modern Auto-Set will tell you. The Auto-Set is hand- some, roomy around the grips for freer handling, and lastingly built. For the smaller jobs or for use in close quarters you couldn’t own anything better than the Sargent Steel Block Plane. It is small, but mighty sturdy and dependable. Ask your dealer to show you these long-lasting economical planes and write to us for free booklet. Sargent & Company, Manufacturers, 49 Water Street, New Haven, Conn. SARGENT PLANES Sargent Steel Block Plane No. 5206 Sargent Auto-Set Bench Plane No. 714 Met

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POPULAR MECHANICS ADVERTISING SECTION 121 &tpl Tube Set Sinole Dial Radio re oO" Re. “me oe .

n ’ - => Metrodyne : Radio Sets Are Equipped For BATTERY or ‘ELECTRIC operation

scitiaiatiee - = AA etrodyne frcanme ae | 5S COMPLETELY ASSEMBLED BIG DISCOUNT pa

Wonderful offer direct from the factory! The world’s greatest radio! A perfect working, single dial control, 7 tube receiver! And just to prove our claims, we will ship it to your home for 30 days’ free trial. Test it under all conditions. Test it for distance, volume and tonal quality——-and if you are not convinced that it is the best single dial set you ever heard, return it to the factory. We don’t want your money unless you are completely satisfied.

G PROFITS TO Three Year Guarantee CENTS AND DEALERS| Metrodyne Super-Seven Radio

selling amg Sets. bay Te work all A single dial control, 7 tube, tuned radio Easiest set to operate. Only one small of othe al slates tin aenac tee nag <r ed frequency set. Tested and approved by knob tunes in all stations The dial is dyne Radios have no competition. Lowest egg Be oy edie. % o catons, ‘ekene te he dar “x ote anne oicas » , 2 Ss, : adio aboratory, stations in the dark The volume control Soe kee Goad aa as Radio News Laboratory and by Ameri- regulates the reception from a faint whisper pon tell ie: ” Gout “en * ca's leading Radio Engineers. Designed to thunderous volume, 1,000 to 3,000 pm : send coupon, letter or and built by radio experte. Only the high- miles om loud speaker! The Metrodyne

postal for our agent's proposition. est quality low loss parts are used. Mag- Super-Seven is a beautiful and efficient nificent, two-tone walnut cabinet with receiver, and we aresosure that you will be beautiful, gilt metal delighted with it, that we make this liberal trimmings. Very newest 30 days’ free trial offer. You to be the 1928 model judge

- Loy ~ * a ’, MaiiCVUUPrun wb Let us send you proof of Metrodyne quality—our 30 days’ free trial offer and 3 year guarantee Mrs.WM. 1LEFFINGWELL., W EST- J.W.Woops, LEADVILLE, CoLo.. FIELD, N. J., writes rhe Met- writes: Received the 7-tube rodyne Radio I bought of you is Metrodyne intinecondition Had a wow! This is as good as any it up and working same day re- $225 machine I have ever seen.” ceived. Was soon listening to N. M. GREENE, M aywoop, ILL., 1.os Angeles, San Diego,Oakland writes: “My time is up and the and other California points; also Metrodyne works fine I got St. Louis, Kansas City and other — ear srarante 4 arantee Havana, Cuba, Oakland, Calif., east and south stations all Metrod ~ Six Denver. Colo., Toronto, Canada, coming in fine Am more than yne u Ss all on the loud speaker.” pleased. Sure enjoying it } We will send you hundreds of similar letters from owners who ew 1928 model Metrodyne 6 tube, two dial, listance tuned radio frequency receiver [ ved by leading radio engineers. Highest e »w loss parts, completely assembled in a tiful walnut cabinet Easy to operate Dials easily logged Tune in your favorite station on same dial readings every time—no MAIL THIS guessing Howard, of Chicago. said: “While five COUPON hicago broadcasting stations were on the air tuned In seventeen out-of-town stations, in- = ng New York and San Francisco, on loud eaker, loud and clear.” acclaim the Metrodyne as the greatest radio set in the world. A postal, letter or coupon brings complete information ,testimo- nials, wholesale prices and our liberal 30 days’ free trial offer.

eS ¥ = 5 a. & i "= METRO ELECTRIC COMPANY 2161-71 N. California Ave., Dept. 45, Chicago, Il. Gentlemen @ Send me full particulars about Metrodyne 6 tube and 7 tube sets and your 30 days’ free trial offer.

or send a postal orletter. Get our OT EEE RTT TE TS ° a We are one of the pioneers ot radio. The proposition be- success of Metrodyne sets is due to our fore buying a ra- ee ai) Pew OE Ee SS oa aee liberal 30 days’ free trial offer, which dhe. ~~ direct im * eee . gives you the opportunity of trying be een. ee ee ae wg ae se 0 3 i . »r—SAVE v fore buying. Thousands of Metrodynes MONEY— PPT PTIT TIL Tee cubes shee seeeeanwue MONE Y—WRITE have been bought on our liberal free Now! trial basis. METRO ELECTRIC COMPANY the lf you are interested in AGENT'S prop- a 2161-71 N. California Ave., Dept. 45, Chicago, Illinois sition, place an “X" in the square amp | ite

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22 POPULAR MECHANICS ADVERTISING SECTION What About Your +e - COUSE ea The ZeroMeter Takes the worry out of winter driving. instrument. Install one now! Is a constant and accurate check upon the amount of alcohol present in the cooling system of your car. Always working. TOO MUCH alcohol is sheer waste, for it evap- orates out on the first mild day. NOT ENOUGH alcohol means a frozen radiator and cracked cylinder block. JUST RIGHT means economy and no worty,— “The ZeroMeter Way The all aluminum ZeroMeter makes attachment on any car. Easily installed on the radi- ator hose by any one. Saves its cost in alcohol. Once installed, it can be taken apart in a moment—without affecting the water in the radiator. —SENT ON APPROVAL Fill in the coupon below and get a ZeroMeter on t Z A permanent a handsome approval. If you are not satisfied with it, your money will be refunded. CHRISTIE-COUSE CORPORATION 2928 Migel Pl., Bronx, N. Y. Please send me a ZeroMeter on approval. I will pay the postman $3.50 and postal charges on receipt of the Meter. | L money will be refund Name Street and N 10 days and my City mal . State. _ (Please princ) if $3.50 check or ] Sent postpaid money order is } enciosed ida, $4.00 postpaid. Get Ready to Join a Harmonica Band! ES, you can learn to play as well as the next fellow. All you need isa Hohner Harmonica, our free instruc- tion book, and a little practice — and first thing you know, you'll be reeling off the tunes like a veteran! Pretty soon you'll be looking round for some other chaps to join you in a harmonica band—and that’s when you'll really appre- ciate what fun there is in being able to play this “miniature orchestra.” There are harmonica contests, too, in which thousands of boys take part—and some mighty handsome prizes waiting for those who win! The NEW Way to Learn A special orthophonic Victor Record (No. a 20377) **How to Play the Harmonica” is now available for those who wish to learn by listening to the living voice of the instructor, and following the notes as they are sounded on his harmonica. Illustrated instruction sheet also included Reverse side reproduces “Old Black Joe’’as rendered on harmonic a with pt ano accompant ment. At all dealers selling Victor Records. . .« « complete 75c . FREE Instruction Book \ Anyone can learn to play the harmonica by following th« clear, simple, illustrate instruct given in our booklet "yy low to Play the Harmonica.”” Free at your dealer’s — or write to M Hohner, Inc., Depr. 508, 114 East 16th Street, New York. ons TO een “HOHNER? Harmonicas

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we Your dealer has a full line of Dorfan wide and narrow gauége trains, bridges, tunnels, sema- phores, tracks, switches and stations. Be sure you see them all today. The Only Electric Engine You Can POPULAR MECHANICS ADVERTISING SECTION Take Apart and Rebuild It's a Dorfan Loco-Builder—the fastest and most powerful electric engine made. Think of the fun there is in being able to take apart your engine and put it together again! How this develops skill and a genius for things mechanical and electrical. This “Take-apart”’ feat- ure is found only TAKE-APART ELECTRIC _in Dorfan electric engines. Dorfan engines and trains are handsome and powerful—copies of famous transcontinental flyers! Thousands of American boys say— ‘‘there’s no train like the Dorfan!’’ Priced from $6.00 to $38.50. Ask your dealer today for a cata- log. If he does not have the new catalogs yet, send us his name and he will receive a supply for you and your friends) THE DORFAN COMPANY, ENGINES TRAINS 137 Jackson Street, - Newark, New Jersey. - DORIAN

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POPULAR MECHANICS ADVERTISING SECTION IF YOU CAN USE AN EXTRA 202° Bile write for this How to make HOME .»“AUTOMOBILE FREE|,~ BOOK You ean save $20.00 in no time by using SMOOTH-ON No. 1 to do vour own household repairing—and in addition you will have that proud ‘‘I- SOs Seemee ten. | "ewe Model Dott wilh UO! Pocket Gen PTITIIIIIIttitttliftiiiiiiiiiiiittiiiiiftiitiiitiiiiiii iii iii iii) T he New Mx rde ] P< ve ket By nN} SMOOTH-ON MFG. CO., Dept. 37, high among good watches. That’ 574 Communipaw Ave., Jersey City, N. J. ' : cause it combines good loo Please send the free Smooth-On Repair Book

Ks VW correct time-keeping. Sold everywhere for $1.50. W night-and-day dial $ Address . Bi na 12 Return this coupon for a |WESTE _ CLOCK COMPANY 27 FREE copy of Booklet La Salle, Illinois Ce ee a

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POPULAR MECHANICS ADVERTISING SECTION

tas Different ? “SURE /- Heres Why oie ones ic set out to produce a really practical and efficient work shop. Delta Handi-Shop. | \ After long and careful study and experimenting, we secr¢ appe od all a i of the old, conventional designs and ideas, and decided upon a am the using a sturdy, quiet-running motor of special design, with to the work the DEL- ; : ; . TA HANDI-SHOP two shaft extensions—right there we had a valuable feature that will de offered unusual, and practically unlimited possibilities While the much-used Circular Saw is driven from one shaft, the Lathe, with its many attachments, can be driven from the other shaft There are always two tools ready for work and easily controlled by a conveniently placed switch. Simply throw off the Special Rubber V- belt and the saw is disconnected. In a jiffy any one of the many full- sized, sturdy, practical accessories is in place and you are ready to go Simple, isn't it? You never saw anything so easy—so quick—so con- venient as the interchanging of attachments. You must try it to thoroughly appreciate its many advantages—its outstanding superiority. The Delta Handi-Shop consists of the following—all specially designed all sturdily built from the finest materials obtainable. MOTOR—Specially designed % H. P. fully enclosed, 1750 R. P.M., E constant speed, with two shafts. Bg 2 a LATHE—has capacity of 9-inch diameter by 24 inches. (Can be furnished sizing and a up to 36 inches at small additional cost.) Steel bed of 4-inch trotype ve U-Section—will not chatter or spring Ballbearing Tailstock, 4-inch face plate, spur center, cup center, and wide and narrow tool supports. Lathe Attochmea> oak diameter, fast-cutting emery wheel, adapter flange, 6-inch buffé@f, 5-inch wire brush, all of finest quality—all oversize s-inch capacity Jacobs chuck that fits both motor and tailstock spindles two turning tools. Sanding Attachment—S8's-inch Gigmeoter “Man Size” sanding disc. Takes standard sheet of sand paper. Novel design sanding table 5-inch by 12-inch, tilts 45 degrees down, 10 degrees up An exceptionally valuable and useful attachment, quickly attached and easily adjusted Flexible Shaft—Can be furnished in two sizes, with hand pieces to take wing special frame for standard burrs. Ideal for carving, metal pattern and die work, etc. iin ’ fine x welers ‘ease | NOW—Give Yourself the left

a I-ineh by 12-inch f <= | Make all those wonderful, attractive things you want around the house derr veath table, an | Develop your ideas and inventions. Get started in business—earn money on e Delta feature. | full or spare time. Let the DELTA HANDI-SHOP be your never-falling and faithful servant. Lack of space does not permit a full description here, so act how—send for it and judge for yourself 10 pays FREE Tri al eel FREE Blue Prints DELTA SPECIALTY co. 4 emall q own payment brings this compl workshor Dept. MP-1227—-658 3rd St., Milwaukee, Wis those unusual things that’ only Delta’ Handi t ean do r quicker Send me your Mustrated color folder describing De too il, Muetrated folder tt de. § Handi-Shoy Tell me about your Free Trial offer and « “ ng small flexible shaft scribes in detail every novel ire of the D EL TA HANDI- payment ote the del- SHOP. See how much you 4 fo r so modest an outlayof money | work pe wnible Uses . lard burrs, easily ob- Name... te cresrmnee.” “" | Mail Coupon Now! a §treet Address City

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126 POPULAR MECHANICS ADVERTISING SECTION a KUPROX “A’’ TRANSI- FIERS—Batteryless, noise- less, electric ‘A’ power Dry, dependable, needs no attention. Operates any receiver 4-volt or 6-volt, $28.50 and up KUPROX A & B TRAN- SIFIERS All radio power from a single unit Con- trolled from set switch. Ab- solutely dry, requires no attention. $57.50 and up. KUPROX B TRANSI- FIERS Dry, permanent, free of hum. Guaranteed voltage at rated output. Models for all sets and cir- cuits, $14.50 and up. = No Acids, Liquids or Charging Bulbs No watering or other attention! KYU PROX Radio Power Devices make any set entirely electric! Now, no more of the both- er and worry of batteries .. none of the troublesome watering and attention. KUPROX is absolutely dry .. all metal .. . it requires no watching or watering. . no attention of any kind. Simply install KUPROX Radio Power Devices on your set and forget them. A mere snap of a switch gives you all the power you need without a bother of any kind. Your radio dealer has the complete line of KUPROX dry Power Devices, from trickle chargers to the mighty A & B Combination Models that supply all radio power from a single com- pact unit. Battery Elimination,’’ describing KUPROX Devices, will { FREE BOOKLET FOR YOU: ‘The Secret of Successful Write for it. >} be mailed free on request. THE KODEL RADIO CORPORATION, 517 E. Pearl St., Cincinnati, 0. KUPROX RADIO POWER DEVICES KUPROX REPLACE- MENT UNIT—For replac- ing the acid jar on al standard trickle chargers and power units Eliminates all watering and attention. $4.50. KUPROX TRICKLE CHARGERS — Absolutely dry; t-amp. rate. Large model gives 2'4-amp. booster charge. $10.50 and $18.50. ial

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rr POPULAR MECHANICS ADVERTISING SECTION 127 You can build a beautiful Ship Model as low as $4.98 or a Loud Speaker Ship Model for $12.50 with your own hands in a few hours of pleas- ant pastime from parts, cut to fit and ready to assemble, supplied by the largest builders of ship models in the world. rk in order to build one of these ships. No special knowledge f ship model building is necessary either. We will supply all ' A fifteen year old z school boy won first - prize in a model build- ' ing contest with a Con- : stitution model built from our kit of parts * : CONSTITUTION More than 1,000 models LA PINTA ; i - . > were entered in this A Ship Model Loud Speaker. Size: 26" high; Size 30° high; 32" long; 10° wide (overall) contest. 27" long; 12" wide (overall) \ vill supply the parts for the Constitution (Old Ironsides This is the most beautiful loud speaker on the market We fit and ready to assemble for $6.98. This price includes will supply you with all parts necessary and complete instruc- part necessary for constructing the complete model tions for building this beautiful loud speaker ship model rhe nstructions for assembling Old Lronsides are included with price of $12.50 also includes the melody sail and loud speaker t A diagram of parts, showing the number of the parts uni The unit is of the Electro Magnet type an d does not ist exactly how to piece together the model, make it im- require power amplification to bring out the low notes as it gives le for you to make a mistake. Other beautiful ship faithful reproduction at all frequencies rhe mainmast is lels can be built from our cut to fit and ready to assemble deeply imbedded in the solid wood hull and the unit is attached t We have kits for the Santa Maria, the La Pinta and the to this mast, making it impossible for counter-vibrations to lower at $4.98 each. affect reproduction | nie TieaikRintiiiek ; tT {) 3 Ciui ahd VIaiiCitiadl MU VCUUL d » doubt you have often admired ship models and yearned Easy! Nothing simpler. The instructions are like that from jf ossess one but could not do so because the price was too beginning to end Do this and that and before you realize it a i Let the WORLD'S LARGEST BUILDERS OF SHIP beautiful ship model has grown before your eyes j MODI LS AND SHIP MODEL LOUD SPEAKERS supply Write for our free, beautifully illustrated catalog, which J with all the necessary parts, cut to fit and ready to assemble contains photographs of all our mo ae Is together with complete m which you can build a beautiful model. details and price of each We will send this catalog without You need not know anything about ship building or carpenter obligation to you Fill in the coupon below and we will act upon it immediately. ome 6 » . ’ © fit 1¢ parts, from the hull down to the smallest piece. all cut to fi If, after assembling the model according to our d ready to assemble. You cannot go wrong. Diagrams and is of parts that are included with each kit tell exactly what t d » with each part. These plans show you step by step just how the model is con- and we P lease send m instructions, you do not think it worth many times the purchase price, return it to us in good condition will gladly refund your money. ee EE ES NIATURE SHIP MODELS, Inc., DEPT. P3 3818-20-22-24 Baring St., Phila., Pa e complete parts, cut to fit and ready to assemble ‘onstitution, $6.98 ; Santa Maria, $4.98 La Pinta, Mayflower, $4.98 Melody Ships La Pinta, Santa Maria, $12.50 Mayflower, $12.50 I postman purchase price plus postage (a few cents). Check which model you want shipped ructed. Everything is made so simple that even a small child Faroe sn build a beautiful model MI All you need is a small hammer to tap the parts into place | Here is a part of the instructions copied word for word from the agram and instruction sheet that goes with the kits. ‘‘ Take | to the ¢ part No. 57, place it in front — of part No. 56 and tap lightly 98 itha hammer Next take part No. 58 and place it up against i: »7 and tap it witha hammer to bring it into place | « -- pay | | > 1 . 4 ' } \ IO | | Nan | Street 1. Dees 4 i Se EAE ETO RR RET Sk IS OEY

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128 POPULAR MECHANICS ADVERTISING SECTION 2 : Fa % ~ A 5... AGENTS MAKING ) PER WI Selling Our Guaranteed Spors Pens and Other Specialties The special polished points and sponge in cap make the points write as smooth as a lead pencil, looks and writes 4 like a $7 pen. Cannot blot or clog, ideal ruling pen. No dull season. Money refunded if not pleased. PROSPECTS WORTH $15 A DAY TO YOU! Business men, students, professional men, stenog- raphers, teachers, merchants, sa'esmen, farmers, bookkeepers, and express agents, in fact any- body that writes, is a prospect. SELLS FOR $1.25 The pens come in 8 assorted colors, la- dies’ or men's style. IDEAL XMAS GIFT, COMES IN HOLLY BOX Handsome roll, pen case with your first order of $6.42 worth of our fa- mous Spors pens. PLIERS No. 311. Drop forged steel. RETAIL PRICE 35¢. SAMPLE 2O¢ UPON REQUEST this large wholesale specielty cat Indestructible ER - showing over 300 fast selling specialties, from many parts of the world. rene ae ah seeeaey JASE , aS * “gall ‘a iS Clare cH eae ot } vr . No. 55P. PEARL CHOKER with Silver Clasp, without box. Retail price 50c. Wholesale price, Sample 19c, dozen $1.95. MEN’S DRESS SHIRT. No. D87. Retail price $1.48. Wholesale Sample 98c. MEN’S HOSE. No. 260. Retail price 55c. Wholesale Sample pr. 29c. Dozen $3.45. DANCING RABBIT. No. 125. Retail price 35c. Whole- sale Sample 19c. Dozen $1.98. F. SPORS & CO. ~1 IOovrFewo wn

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POPULAR MECHANICS ADVERTISING SECTION CHello boys! Se! 1—Complete Unit Control (New es sembled Trumodel Construction equipment perts) 2—New Erector Trumodel 3 Drum Host ‘ 3—New Erector Trumodel Tip Bucket 4—New Erector Trumodel Clam Shell Bucket with these sensational new features f “4 } oe AE ee | =_—_— ae VB. | Why the New ERECTOR is the worlds greatest toy Trumodel Features: ERECTOR SQUARE GIRDER This big lusive Erector feature makes Erector irdy and strong. They are real girders just l gineers use in making skyscrapers and bridges. (In all Erector Sets.) 2 ERE rOR MOTOR You can make 27 | interesting experiments with the ELrector | foter alone. The motor Shaft is the same | diameter as all other shafts. You can hitch pul- ys to both sides of the motor. (In the Famous No. 4 Erector and up.) 3 DRUM HOIST. Completely assembled erating unit New exclusive Erector fea- a0 st e er ge ? l 1 In the No. 8 Erector and up | 4 rip BUCKET. An exclusive Erector fea- tur Inthe No. Sand up.) Send for this free book which tells all about my NEW 1927 ERECTOR S—A Great assortment of New Pea- tere Parts 6—Erector Complete Usit Accessory Sets 7—Udylite — the rust-proof finish (some perts) &—The new Brass Perfect Gear stan- dardization “Wonderful ooh “07% ERECTOR #1522 With Automobile Chassis Here's the set I know will give you the greatest thrill you ever hed. Fun! Oh, Boy! It's the real thing, and there's a thrill packed in every one of its 627 parts Boys, in this great outfit there are hours of real sport waiting for you building au- tomotive models. From this great assortment of distinctive, important and feature Erector parts you can build 554 models—wonderful autemobile chassis, tractors, scooters, service cars, fire engines, hook and ladder, are only a few. Packed in a cabinet and includes a complete assortment of automotive parts, many in colors; also a 92-page manual, powerful electric motor, big red steel dise wheels with oversize balloon tires, fenders, radiator hood, bumper, springs, steer- ing wheel, truck body, heavy truck axles, cab top, boiler, digger scoop—in fact, everything to make this set a world’s standard. Boys! Here’s the greatest book I ever compiled In this book you will find the final story of my years of experience since I first invented Erector—the construction set which other en - co one . i | G EREK POR STEAM BOILER. There is nO givers have been kind enough to call “the world’s greatest toy’—and which they consider one of the most astonishing mechanics! | “ end the models that this exclusive Erector phenomena of the age | é makes possible. Hoisting engine, steam- In this book I tell you how with Erector's new Construction parts you can build and operate (one alter the other) over 1000 actus! fire engine, horizontal engine, locoMmo- working models of Aeroplanes, Submarines, Ocean liners, Light houses, Machine guns, Automobiles, Ship cranes, Trains, Steam shovels The Erector motor furnishes power to Traveling crane, Wrecking hoist, Trench diggers, Locomotives, Hoisting derricks, Cantilever bridges, Suspension bridges, Well drillers, ese models g he § » Y a Power plants and Horsting engines. dels go In the Super No. 7 Think what « thrill you'll get making these wonderful working models whiz and hom Other Erector Features 1 tor contains more parts and builds more els than any other construction toy 2 New Erector Steam Shovel—an exclu Erector feature (In Super Erector 7 and up.) 3 I New Erector Dredge Bucket—an ex- | . e Erector featu Inthe New No. 10 | 4 Curved Erector Girders An exclusive ector feature (In all sets.) 5 nt Fly Wheel An exclusive Erector 5 ture. (In the No. 10 set.) 6 rated Strips - four holes to the ~ ‘ brass perfect gear standardization. The Erector contains a great assartment of ind die-cast gears, including pinion gears, flat gears, mitre gears, and a t }2-tooth gear for it- Send FoF FREE ERECTOR Buy one today—At all stores where toys ore shown | with the powerful Erector electric motor. The day you get your Erector (Christmas or any other dey) will be the biggest of your life. Sead for ay new book “Engineer ing Thrills” todsy and then tell your Ded. Don't miss this chance. Make him reelize whet you really want by showing him the book and then teking him to the neerest toy store to see tor himself. He'll want to buiid models with Erector too. Just 61 out THE A. C. GILBERT COMPANY, 210 Blatchley Avenue, New Haven, Conn Please send me free my copy of the book “ENcineertnc Tuean.s.” Name Street City State a _ ——

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130 POPULAR MECHANICS ADVERTISING SECTION ‘ , , ‘ Make this a Musical Christmas Thi Ss New B THIS YEAR 00 SPAN Will Save Y $100.00 This new Hi-Q lete in Construction- tea \ va “a ne Write for charts, dia : . ¢ you ow This ~ 2 This Christmas— simply you Book! 2 Photos your boy, your girl, or can save at ro yo a. A. B. C. yourself—would prize +4 least $100, or €scriptions, a PAN-AMERICAN how easily Also includes trumpet, clarinet, saxophone or and quickly full instruc. other wind instrument. Ord you can make tions for now a PAN-AMERICAN, which : large profits building the leads the world in medium- through Hi-O Power priced, factory guaranteed building the Supply Unit band and orchestra instru- advanced Used with ments. You can learn to play a CUSTOM- equal su PAN-AMERICAN in three les- BUILT “Hi-Q iy erefcesion. sons. Free trial offer from now Six ee 1 A pa Sten to Christmas. Easy payment receiver at ce ¥ “ plan. Send coupon today for is as MHammariund me oe bs beautifully illustrated catalog experts wit Save at ase age te: its remark- witgga ote a, a io 4 able performance. re- own set or if you want « Send No Money—Mail Coupon Samed ber tonal Aanesiente * caus. Gl gape Senin sees 2 eS SB SO eR eSB ee eee leading manufacturers, the nationally - advertised Pan-American Band instrument & Case Company this 48-page comprehen- a Ag Ty ge “N Dept. G-13, Elkhart, Indiana sive manual gives you prac- ately before first edition is Send me PAN-AMERICAN catalog of medium-priced band tical, thorough and com- exhausted. and orchestra instruments by return mail. 1 am interested in * GARE Se Associate Manufacturers Carter Radio Co. Hammariund Mfg. Co International sistance Someon Ries Ce ye Kise hs m2 (D rher tore Yasley Mig. Co. H. H.Eby Mfig.Co. | Westinghouse Hammarlond- Roberts, Inc. 1182- X Broadway, New York C Sport Express Make a utility expre of your Ford cha small cost. Write for circular E ing this and other mod SPORT FACTORIES, Aurora, noi CAN YOU SELL GAS at 5c PER GAL.? € ’* Ifso write me quick. My Distributors mak« is 5 oo 3 high as $3,000.00 per month. Let me show you h | © dart®h 0 | oo aCe 3 SEND FOR FREE TRIAL | b Proof of astounding success and my $15.00 a day | “Build your own with ‘RASCO’ Parts’’ Guarantee to Distributors. | BAStO SPECIALTY CO.. OS E Park Place, Now Verk, N.Y. Frank Andrews,Dept. 805-T, 154 E. Erie St.,Chicago, Ill. @) wu \ — WRITE FOR firm Fansteel Products Company, Inc. Sed \ a he CO’ CATALOG! is : — Address Dept. AA , hica lin North Chicago, Illinois E fro OUTBOARD MOTOR CO., MILWAUKEE 5 J . . Pol Genuine Full Cut Diamonds—No Chips Terms: 6 Months to Pay No. 6132. Solid Gold Men's Initial | Ne. 6746. Genuine Double Head Scrat or Emblem Ring. 2 Genuine Dia- | Cameo (raised hand carved heads); 7 monds 4-100 each. 14-Kt. White | j-piece stone Heavy Shank in Gold Top. Emblem (any lodge) or | w hite Solid Gold or Green.Gold any initial (Old English) Yellow or | ~~ Cee : = ahneberdeaded. : White Gold inlaid in Genuine Hepe | Genuine Stone—ony x, nicely shaded. Ruby or Black Onyx. Mention if | Send number of ring, size of finger, desired in solid White Gold or | initial or emblem desired, and ring oe 8 Green Gold, same price. will be sent for inspection No. 6746 $94 BUFFALO JEWELR Y MFG. CO., oar iea., Exact size of ring This Reg. “EB Trade Mark Dept. P (or at your Jeweler’s) Po -::. A guarantees you genuine diamonds 501 Washington St. BUFFALO, N. Y. Ask for Free Jewelry € stale

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POPULAR.MECHANICS ADVERTISING SECTION Completely Apres, Motorizes Your Work Bench A big, efficient, practical workshop for regular commercial or home use; operates from any lamp socket. The kind used by carpenters, small manu- facturers, machine shops, home craftsmen—yet costs no more. Contains— Seven Heavy Motor Driven Tools i1—Motor Driven Lathe on heavy cast iron base; takes up to 10 in. diameter and 18 in. length. 2—SpeedWay Bench Drill, \% in. in steel or 4 in. in wood. 3—Bench Saw with 6 in. blade; rips, cross- cuts, mitres, grooves. 4—Patternmakers’ Jig Saw with 10 in. throat. 5—Motor Driven Grinder, 5 in. emery wheel. A Combination 6—6 in. Metal Scratch Brush. to Suit You 7—6 in. Buffer and Polishing Wheel. For the man who wants a Shop All necessary parts supplied, including two = for special uses there are various chisels, jig-saw blades, etc. combinations. Even the $42.50 Shop is built to the same high 10 Days’ Free in Your Own Home! = standards as the one shown above. Have Fun or Make Money Send for catalog describing them To work with the Super SpeedWay Shop is fas- all cinating! Intriguing! Profitable, too. You can make almost anything—attractive, od furnitur toys, home and garden igprovements, radio manu- facturing, consoles, bric-a-brac, book shelves — countless useful articles which will bring you an easy, neat profit $10.00 Down! Pay While You Use It Our terms are very liberal—we want every man who can use a SpeedWay to order it for 10 Days’ Free Trial inhisown shop. If you like it you pay the balance a little at a time. Act Quickly! Don't hesitate! We want you to know more about the SpeedWay Shop. Write today to this big factory and benefit by our 20 years’ experience in making elec- Electro Magnetic Too! Co., Address Dept. 2-D., triecally driven tools. We have Sales and Service 1830 S. 52nd Ave., Cicero, Ill. Stations in most of the leading cities. Your copy of our Dear Sirs: Please send me full particulars new, big catalog, showing the complete Speed W ay f about 10 Days’ Free Trial, Free Blue Prints, of combination shops for the home is waiting for you and your Easy Payment Plan on SpeedWay Send in the coupon at once Shops Name. ELECTRO MAGNETIC TOOL CO. Address Dept. 2-D, 1830 S. 52nd Avenue, Address CICERO, (ageens raramentyd cLLSNOES conn Bch Remember this is the nly v of Porta ; tr Hammers ertiie ,

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132 POPULAR MECHANICS ADVERTISING SECTION FULL YEAR TO PAY Royal’s terms make buying easy. Just send $1 wit! order and selection comes to you on 10 DAYS FRE TRIAL. Pay postman only $1 more on deliv- FR oa E fjery. After free trial, pay balance in 12 easy, ainiatens equal monthly payments. Satisfaction ab; Foy solutely anteed or money back. ° your GEMS" Write |All Dealings Strictly Confidential. Order today. Wear while paying. _ass bow for copy. saul tue Mady’s hand bluewhite iamonds; Value," lady's han new style,richly hand pierced 18k solid white gold lady's engraved and pierced 18ksolid white gold mounting; daz- s zling genuine blue pmoantine: Specialy white diamond. $2.89 a month. Bargain. $37.50. .* Sa $2.96. a month. biel : aahions % isite aAKii — Ex yy: ta lad Sring, 18k wages’ newereation! A daz- ‘solid ” ¥ + dex it Btyle_lady’s zlingeluster of 7 fiery uineé blue dinner ting; 3. gena- ine blue white iamond in ine blue ‘white. dia- iamonds set to re- Weoctagon waved a Tichly en- semble a $750.00 soli- top; looks like , Vet. PS ~ pierced tairey" 18k solid $79.50. white ‘ white gold lady’s $6. 46Hmoith. mounting. poh. n Be $49.75. $29.75, $2.32 a mo. a month. AK18—Smart looking and inex pensive! Lady's 14k solid white ™ gold en- % graved ring; - genuine imported black onyx Set in center with spark- ling blue white dia- mond. $19.75 $1.48 amonth USE YOUR CREDIT antesdiigreen’ 5: filled case; radium dial, de- pendable’ time- ee, Spe- pe OL SO. $1.87 a mo: DIAMOND. & WATCH CQO. ADDRESS DEPT. 1837 ~I70 BROADWAY, NY. Build Flying Models of Famous Airplanes! HERE'S fun and useful interest in Buildi: Flying Model Airplanes; shows you, in the bi easiest way, all the parts of real planes, what part does, how they are constructed, what mak« fly and many other things licensed pilots must IDEAL Models are wonderfully accurate copies of Airplanes, designed in accurate proportions, wit! structural features, parts and fittings like real « guaranteed to fly when correctly constructed Th. easy to build; IDEAL Complete Construction O cont: tin everything needed, including Plans, Diag Suilding-Flying Instructions and all parts, fittir materials. Here are several famous models; yours now and get it for Christmas LINDBERGH'S “‘Spirit of St. Louis’’ (Showr top above). Complete ¢ onstruc tion Outtit 3 ft. si FOKKER Monoplane, *‘America”™’ (Shown in ¢ - ter above). Complete Construction Outtit, 3 ft. size 8.50 JN4D-2 Curtiss “‘Jennie’’ Training Biplane (Shown on > cs above Complete Construction Outfit, 3 ft. siz 7.00 DeHAVILL AND Air Mail Biplane, 3 ft. size Complete Construction Outfit, 3 ft. size 7.50 NC-4 Naval Cross-Atlantic Seaplane, 4 ft. size Complete Construction Outfit. 3 ft. size 10.00 NIEUPORT French Scout Monoplane, 3 ft. siz« Complete Construction Outfit 6.00 BLERIOT or TAUBE Monoplanes, 3 ft. size Complete Construction Outfit, each 5.00 Ask your Dealer for IDEAL Model Airplanes or Order Direct if Unobtainable in Your Ix cality. West of Denver, Colo., and Outsid« the United States, add 50c to above prices Plans for Model Airplanes For those desiring to build Catalog of Models & Sunplies rhe most come te ar b M with materials on hand, or ve on ordered as needed, we sup- Airplanes ol “> stinable ply complete Plans with pages of inform ation Building - Flying Instruc- etc., on Models, Parts tions for any of the Models tings, Materia!s and listed above Price, in- plies. Every Model bi cluding copy of Catalog should have a cop) 25c EACH 5c POSTPAID IDEAL AEROPLANE & SUPPLY CO.,In Established in 1911—16 years ago. 408 WEST BROADWAY, NEW YORK CIT) e pendable acids or nated drt stations. gardiess | before yc you car écriptive Beat RA 7i1

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mm 5. |

1 ani pendable coast to coast reception. acids or liquids. stations. > gardiess of price. bef: re y POPULAR MECHANICS ADVERTISING All Electric

SECTION as sa eaeeae Tubes-Single Control ug this Randolph Radio into the electric light socket A powerful, selective radio that gives de- No batteries, chargers, eliminators, Easy tuning with one control brings on all] stations. nated drum allows you to operate the radio in the dark and has space for logging Every detail of the Randolph is modern and perfected, unsurpassed re- It is this wonderful radio that you test and try for 30 days FREE ou buy. When it convinces you by actual performance it is the ideal radio— tune in. you can buy it direct at factory prices. scriptive literature today. Beautiful Ampliphonic Console

Made of the finest carefully selected heavy solid burl finish walnut. Has built-in genuine large cone speaker that compares with any on the market, Assures un- limited reception of high and low notes clear as a bell. Com- pletely electric—uses no batteries of any kind. Besure you send for fully illustrated, Illumi- Be sure you write for free de- Genuine Walnut Cabinets The finest of heavy, genuine, solid bur! finish walnut Is used in the making of all Randolph cabinets. No picture can do them justice. You must see them to appreciate them. 6-Tube Radio Do not compare this set with old- style, 2-dial, 6-tube sets selling for about the same price. The Randolph 1928 Senior Six has also been tested and approved by the leading radio engineers. Beautiful solid walnut cabinet Single control lilumi- nated drum with space for logging. Very selective. Sent for 30 days free trial. All Sets

full color folder giving complete details. 4S Guaranteed 9 ge" ad — \ eime J pis «piso, otto oe. Oh) a im ores eile), maeley-\ 4 A S ull “Get , - Brg swe’ ner: o8ts nd aaeteie , Rengetee Radio Corporation i wore nee ce 2G. Riess orth ane, 711 W. Lake St., Dept. 296 1 mercguh eas gel Zou,” Mins Hal | Chicago, Illinois 1 BNE MoM 6 Seems ay mex, 34,08 8 Send me full particulars about the RANDOLPH Six and : \ gt Ae F0e Ve Tie Mat § Seven-Tube seeleamnadt Th . i ere® n neve M'Ge Tube Electric and Battery Table and Console Sets v ote? ates ” =e qot . I with details of your 30 Day FREE Trial Offer. 1 i, Recta uy 8 : 1 : ee ~ m EAN } ane Ne aE ee ey ee | - } ‘ < 4 “+ Fe nan ee SE ee ee a ee ! RANDOLPH RADIO CORPORATION | ‘ City State — ' if interested in Agent's proposition. } 711 W. Lake Street, Dept. 296 Chicago, Ill. . Mark here | ee ee ee Oe ee oe ee es es oe ee

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POPULAR MECHANICS ADVERTISING SECTION Vhe What a uild al ‘Red J erestin preater sible to [Red Bt is a ce r the p + mandy t The F m If our te The Complete Equipment consists of the powerful J Look Red Jacket Drill Motor with direct drive to the Waco Jacket, Craftsman’s wood turning lathe (capacity 9 in. x 34 in.) a bench saw, that has depth and side gauges, scroll and jig saw; and all accessories for both portable and stationary power drilling, buffing, grinding and cleaning. Attaches to any light socket and converts your work bench into a complete private tool and machine shop. Turning Grinding Cabinet Repairing Jointing Carving Sawing Buffing Making Dove Sharpening Successful Winding Polishing Scroll tailing Rondine Master Spinning Drilling Sawing Pointing Scratching pieces F intere »F

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POPULAR MECHANICS ADVERTISING SECTION ‘ Toa Dy Give Him this aie NG ea hat a Gift could a family make to Husband, Father or Son? hat a wonderful gift to a man who loves to work, make, build and create. You keep feeding work and ideas to the ‘Red Jacket’? and it completes each job so quickly, so in- erestingly and so perfectly that the results urge you on to preater accomplishments. Anything and everything is pos- sible to the owner of a Waco Craftsman’s Lathe t isa complete chest full of electrically driven tools designed by a master or the private use of tool lovers and men who create, repair and appreciate andy tools at home. ay > ft teen =-| 4 = & The Famous Waco [Ked @GRJacket| Guarantee If our tools are not what you want when you see them, send them back. Look Out for Imitatioms: There is only one Red acket, one Waco, one Wm. L. Aylward, mastercraftsman. Special Crafts Course and blueprint service is free to Red Jacket Shop owners—all that there is to know about handicraft methods, raw materials, woods, carving, sawing, turning, de- signing, carpentering, decorating, is taught by special cor- respondence, Buy On Your Own Terms Only $10.00 down. Liberal dis- counts for cash. Easy monthly payment plans. It is nohard-- ship to own a Red Jacket. 10 DAYS’ FREE TRIAL Our literature tells you how to start a job of your own. If you are not pleased return the Shop. | interesting Literature Free Send the coupon. You will be surprised with all it contains. Beautiful, Instruc- tive, Fascinating, Interesting. an Mail This to Waco oer WACO TOOL WORKS, Inc. jaded 542-4 N. Parkside Ave., Chicago, I11. is available Manager, Dept. 112. Please send me particulars about 10-day free trial, free blueprints, and $10 down payment.

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136

POPULAR MECHANICS ADVERTISING SECTION “Perfect Radio Parts for Discriminating Set Builders The BRADLEYLEAK A variable grid leak that pro- vides perfect grid leak adjustment, thereby provid- ing the best pos- any tube. The BRADLEYSTAT The ideal fila- ment control. Gives noiseless, stepless control be easily installed in place of wire wound rheostats.

sible results with | for all tubes.Can | The —_—.on °E | Standard equip- ment for accu- rate plate voltage leading B-elimi- nators. Provides noiseless, stepless plate voltage control.

A fixed resistor that is Me" and heat- treated under high pressure. Not affected by temperature, moisture or age. The ideal fixed resistor for B-eliminator hookups. When you build a set or B-elimina- tor, demand Allen-Bradley Perfect Radio Resistors to secure best results Allen-Bradley Co. ELECTRIC CONTROLLING APPARATUS 280 Greenfield Ave. AB) Milwaukee, Wis. —/ control on many | §

Constant Accuracy! TRU VOLT An All-Wire Variable Voltage Control Install Truvolt in your B-Eliminator and vary voltage exactly. A new.type wire variabk resistance kept cool by its greater radiation surf —like an air cooled motor Develops but the temperature of other resistan like size; hence is permanently accurate and lasts definitely Positive metallic contact always and exact readings of resistance Type

Resistance (Ohms T-5 0 to 500 < T 0 to 1,000 1 0 to 2,000 1 -50 0 to 5,000 -100 0 to 10,000 50 0 to 20,000 35 -250 0 to 25,000 3 -500 0 to 50,000 Eight stock types with resistances up to 50,000 ohms. All rated at 25 watts Price $3.50 each Also a full line of Wire Fixed Resistances. Vrite for free hook-up circular. “This Is An Eliminator Year”’ Dept.17B, 175 Varick Street, New York Current (Milliam per %)

NEW TIMER FOR FORDS | eres ty pope tds a] 2 oO he D y iad A M 0 60,000 MILES. ‘WITHOUT TROUBLE WRITE TODAY FOR FREE OFFER Agents Wanted Everywhere Ectipse Timer Co., 2933 Meinecke Av., Milwaukee, Wis NINGER WILLTRUST YOU END 30c IN STAMPS FOR CATALOGUES =B1C MONEY SAVINC FOR You ’ d rebuilt motorcycles $25 to$ oo 50 andomssa All machines fully guaranteed New bicycles and mo rices, save dealers otorcycie and auto es $3. Complete live lies. DENINGER P syour OCHE'S aT 14 Catch Fish! € Eels, Mink, Muskrats with our new folding galvanized STEEL WIRE TRAP. Write for our FREE TRAP OFFER and |! Catalog. $1 Box of our famous Fish Bait FREE to introduce our WALTON SUPPLY CO., 3501 JUNIATA AVE., ST. LOUIS, mo

reycies

WE WILL TRUST YOU Pay As Low As $2.00 per Week Hendersons, Harley -Davidsons, Inia Slightly used and rebuilt. Hundreds to select fro Send 10c for list today. MYEROW BROS. CO., 15 Berkeley St., Boston, Mass., U, 5.4

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POPULAR MECHANICS ADVERTISING SECTION 137 — sng _ Your Harley-D avi aes MN} —and the Great Outdoors « me EET old King Winter man to man. Ride a Harley-Davidson Twin out into the clean, crisp ae air that zips the red blood through your veins! Harley-Davidson speed and getaway make cars seem logy. Its balance and comfortable springs carry you 3 comfortably and safely. Plenty of room in the side The Single our famous solo - mount that travels 80 miles car for a pal and your “plunder”. And the running to the gallon” and {e priced : " ctor ll models h cost is only 2¢ per mile! . b. Sectors. AN sodele hove 1928 models have both front and rear brakes, and many other im- electrical equipment. provements. Prices as low as $310 f. 0.b. factory. Ask your dealer about his Pay-As-You-Ride Plan. Mail the coupon for litera Hartey-Davipson Motor Company Department P Milwaukee, Wisconsin S Ue D325 “S| Veek ndians

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138 POPULAR MECHANICS ADVERTISING SECTION mg" Brings You Either of These Guaranteed Eliminators Super-Power “A Fliminator This eliminator completely replaces ‘‘A’’ Batteries and the bother and expense of chargers with their disappointments. Here is constant, smooth, unvarying, humless current at 6 volts for any radio using 201-A and power tubes. Not a Battery-Charger Combination Large capacity rectifier in thissuper-power “A” Eliminator changes alternating house-lighting current into direct current. Highly efficient heavy duty filter system then changes pulsating direct current from rectifier into smooth, even current for lighting of filament in radio tubes. By simply attaching this “A” Eliminator to your set and plugging in the electric light socket your set is instantly supplied with the correct amount of hum-free current. Requires no attention, as there are no bat- es to be charged. Always reliable whether used once or a thousand times a year, Has no moving parts to wear out. Operates from fight socket 110- 120 volts, 50-60 cycle A.C., output 6 volts for all sets up to 12 tubes with power tubes, Test It for 30 Days Just fill out the coupon below and send it to us with one dollar. We will send you this Super-power “*A’® Eliminator. Try it for 30 days before you pay an- othercent. If it fails tomake good inany way return it at our expense and your money will be cheerfully re- funded. Because of our great buying power we are able tooffer you this *A’’ Eliminator at 4 less than it is sold for elsewhere. Itis offered com plete for only Super-Power “RB? Fliminator This eliminator permanently replaces “B” Batteries and the constant expense of getting newones. Attached toyour radio and plugged into light socket it delivers a steady flow of power. Hum, noise, dis- tortion and all other disturbances are gone, Used with any good “A” Eliminator it completely electrifies your set. Complete with Raytheon Tube This super-power “B” Eliminator can be used with any set up to12 tubes. It comes complete with full wave rectifying 85 Mil. Raytheon tube, making possible the de- livery of great current at a high voltage. This Raytheon tube has indefinite life as it has no filament to burn out. Delivers up to 180 volts. The case is beautifully finished in olive green Duco with black panel etched in gold. Equipped with rub- ber-covered cord and socket plug. High voltage taps and variableadjustments enabie the use of new power tubes. Operates from 110-120 A.C., 60-60 cycle current. Has tap for intermediate voltage, on which 67)2 to volts may be obtained. The detector tap will supply 224 to 6744 volts. Variable adjuster will deliver any desired detector voltage. On and off switch and high and low voltage switch are integral parts of the elim- inator. No additional switches or cords are necessary Test It for 30 Days We make you the same liberal trial offer with this *B Eliminator as with the **A’’ Eliminator described in this advertisement. Ordinarily this **B” Eliminator ordinarily sells for the cash price of $42.50. Youcan buy it on easy ee re ee Le - iell ee 31.50 payable for ryt in easy install- $28.56 ments after you afteryouhav test it. 4 . tested it. ect) a Cech 14 J v en = t i —f ELLIOTT RADIO CORPORATION, Dept.392 i 709 West Lake Street, Chicago, Mlinois § Attached find $1.00 for which you agree to send me ( )“*A” Eliminator @ at $31.50. () “‘B’” Eliminator at $29.50. (Send $2.00 if both are § desired as described in ad.) Full particulars will be sent me by g return mail and my money refunded if I do not accept your offer. H Name eunincninnnintiin B Address i City. State Accessc to Up-1 Date Sh

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POPULAR MECHANICS ADVERTISING SECTION A Had DAS) V3 Ol? + a oat BY 139 1” TO

: HOME MECHANICS MADE EASY WITH THE NEW UP-TO-DATE HOME-CRAFTSMAN = THIS OUTFIT IS A SUPERIOR DE- _ The

Send for YOUR Own ’ rerms On ans oo down —balance arranged to ur convenience Liberal discount for cash 4” Jointer Accessory to Up-to-Date Bhop

age Home- se & FS | : shown above, which n be operated from any & ; Bec ' ¢} ty , VELOPMENT OVER ALL OTHERS home electric ‘light axture consists of a Super- a ii! ] Tt , | H. P. Motor, a Genuine Precision Lathe , 42 ih Home Craftsmen, Cabinet and Pattern (10x 34 ——: a six-in h ere 6 Sy 7 A. Makers, have found our shop invaluable in featuring the Tilting Table Bevel, Miter, Side BL i ~ a al ' : . and Depth Gauges, a Superior Jig Saw for t " - making the commodities of their business. 2.51 work. all accessories for buffing. grind- } Kk | Portable, compact and inexpensive, this shop jing etc., and all portable or stationary drilling ¥ ' il ' can be afforded by any home or shop mechanic. and sawing P ‘s os at st rq | $10.00 down makes it possible to outfit your Volumes of literature explaining the shop in 0 iT A = & i bench with this equipment, equal in efficiency detail may be h without any oblig mation by Ke ,.lCY me and accuracy to any professional machine shop mailing the corner - coupon Our Educational and Blue Print Departments 15 Band eupervis) of Master ( rafteman After receipt of the Up-to-date Home-Crafteman's Shop, offers s : ndence uefied. t ques delay every ' at refund turn express char DAY FRE a TRIAL our shop for 10 days at our expense not satisfied —return—express collect for full particulars to Up-to-Date Machine Works 2915 S. Wabash Ave., Chicago, ll. MANAGER, Dept. D. Without any gatio

ADDRESS.

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POPULAR MECHANICS

Most Smiles Per Dollar Your happy face will smile right back at you when you begin to shave with Barbasol. No brush. No rub-in. Noafter-smart.Try Barbasol—3 times —according to di- rections. “Mister, you’re next!” Barbasol For Modern Shaving

The Barbasol Company Indianapolis, Ind. I enclose 10c. Please send trial tube. Name Address ....

ADVERTISING SECTION An amazing value that can't be beat! Latest 6 tube tuned radio frequency circuit Ixtremely selective, marvelous sensitivity Two stages of radio fre- quency, detector and 3 audio amplifiers for improved tone quality Two dial control. All metal chassis. Shielded. Clear and realistic reception guaranteed. Beautiful front panel, crystalline finish. Metal panel and sub panel; all parts mounted. Simply connect a few wires. No special tools needed. Vernier dials for fine tuning. New type UX sockets All hook-up wire and colored battery cable included Value $60.00—our price $16.95. : Simple Wiring Directions Very easy to wire this set with the instructions we furnish. Just connect a few wires. That is all. Can be wired in a few minutes by anyone. No radio tnow needed. Make money by wiring these sete in ye Spare time and selling them to your friends Just write your name and address on a post card and ask us to a y t outfit together with 6 tubes. We will ship them right away V ya only $16.95 plus a small delivery charge RADIO EQUIPMENT CO. Dept. PH 549 S. Wells St. Chicago, Ill.

AGENTS/# Jmproved Dubeledge Stropper Pays ae 100008 eekl Think of it! Over 500 clear satisfactory shaves from asingle razor blade. Tell men how to shave for over a year, with one "1 blade, by stropping with new Dubeledge razor blade stropper. Make an easy $100.00 a week. Sharpens all edges in one operation. Makes new blades out of old ones in a jiffy. Sensational Features get Quick ey Nearly every stropper on the market sells for $3.50 to $5.00. Here's one with features the others do not have, yet it sells for $2.00. Sharpens with true diagonal stroke all edges without removing blade. Easy to work—noth- ing to get out of order — guaranteed he last lifetime. Show these Debstodee features and the sale is ma Read This Big FREE Offer We give free with every Dubeledge stropper our new patented pencil. Automatically feeds new leads, one after other by pressing top. Writes 48,000 words, or one ar without refilling patel k aales assured with free offer A to make at least $100.00 a week : Postcard will bring information, .— MORTON SALES CO., Dept. B12 10-15 46th Ave., Long Istand City, New York Write for Free Plan, < ) Get facts free. We show you h« r\ ae

Pay B= . For. Every Woodworking ors. VOO—H & A Equipment’ . All machines portable, electrie—sturdy, efficient, reasonably priced. Just machines in which you are interested, write your name and address i and return this ad to us for complete information Dealers in all pr SON 612 HESTON & ANDER Depot Street Fairfield, ta

INCREASE YOUR PROFITS ¢ Sell more Accessories, Gas, Oil, Tires, Batteries, Repair Jobs, Paint Jobs You'll sell more of everything it zon give a BETTER, MORE DEPENDABLE AIR SERVICE THAN THE OTHER FELL‘ Ow Only $12 Monthly pays for the dependable HB Ball Bearing, Silent Spiral Bevel Drive, Automatic Air Compressor. Try~* it in your shop for 30 Days At Our Risk—on absolute Money Back Guarantee A letter or card will bring complete details HOBART BROTHERS, Box M1272, Troy, Ohio

$$ o

¢ ° ‘ Lowest wholesale | on highest quality ¢ A goods, Any Hand can install his own Plu and Heating BY OUR EASY METHOD. Get t! and pay only alittleeach: Send for FREE Bo New bargain catalog just With our cut-to-fit systems you waste material and high labor cost. 50 of economical service to home owner ers, builders and mechanics. Million I Plants back up our Bonded Guar: FREE book gives you tne whole

Write for your copy today. . t 107-17 West Pershing Road, Chicago, tll.

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POPULAR MECHANICS ADVERTISING SECTION TTTTTTTT ov? a an, Bp) in Sent for only Here is the greatest buying opportunity today! Just $1.00 down brings you the famous 21-Jewel Studebaker Watch direct from factory. Balance in easy monthly payments. Lowest prices ever named for equal quality. You save fully 30% to 50%. Your DIRECT choice of 80 magnificent, new Art Beauty cases and dials. FROM Latest case designs in vellow, green and white gold effects. Exquisite thin models. 12 Size and 16 Size. Send FACTORY coupon for catalog of Advance Watch Styles and full particulars. S 21 JEWEL ee R , v TUDEBAKE ‘The Insured Watch. The Studebaker Watch Company is directed wd members of the famous Studebaker family—known throughout the world for three- quarters of a century of honest dealing. Studebaker Watches have 21 Ruby and Sapphire Jewels, 8 Adjustments—for heat, cold, isochronism and 5 positions Made so good we insure them for your life-time. Insurance policy free with every Studebaker Watch. Ladies’ Bracelet Watches, Men’s Strap Watches Diamonds and Jewelry also sold at lowest prices and easy monthly payments. Send coupon for details. MAIL COUPON Let us send you a copy of our bea itiful new 6-color catalog. It contains complete information on watch making. It te! s how for FREE BOOK! ' ; you can buy a 21- Jewel Studebaker Insured Watch direct from the maker—save big money—and pay for it in easy monthly payments. Mail the coupon. SPECIAL OFFER! Watch Chain FREE! For a limited time we are offering a magnific cent Watch Chain Fr ree. To ill who write immediately we will include particulars of this astounding offer. Time is limited. Send the coupon NOW before this offer expire STUDEBAKER WATCH COMPANY Directed bythe Studebaker family-three-quarters af a century af fair dealir Mail This Watches + Dian onds + Jeu elry Dept. N-806 « South Bend, Indiana Coupon Canadian Address: Windsor, Ontario l Ij STUDEBAKER WATCH COMPANY Dept.N-806, South Bend, Indiana Please send me your free catalog Please send me free of Advance Watch Styles and de- [] catalog of Jewelry tails of your $1.00 down offer aod Diamonds Our Diamond and Jewelry Catalog is just off the press our copy will be sent you FREE if you mail coupon. Name HMUNUNIE l | | i It =I | Street or R. F.D.. 4.

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142 AA ra SHOPF UL OF TOOLS WITHIN ARMS SAW TABLE RAISED SHOWINC EMERY WHEEL , SAW 7 GUARD AND ()\_ N DRILL AT ~ TACHMENT THE short four years, : = factories PLANER AT- = TACHMENT (Le SAW TABLE one bevel, polish. SHOWING © SANDING osc ATTACHED 12”x16" table, 8 space the Devitt 8- Inch Combination § a practical necessity in thousands of shops, and households everywhere. sprung up, but Devitt leads them all. and economy of this handy little machine that will rip, cross cut, miter, groove, Attachments are easily and quicky adjusted. and motor, when set up for work, occupy very little room. &: is equipped with 14 H.P. 60 cycle, can be attached to ordinary light socket, and provide power for other purposes when wanted. without aomg POPULAR MECHANICS ADVERTISING SECTION * gooo INusc: SAW of Saw has become r.0.B. PHILA Many imitators have Think of the convenience mortise, tenon, drill, rabbet, grind, buff and The saw paw 110-volt A. C. Motor which A cut up to 214” can be made Comes complete with following attachments ” Combination Saw, iron pulley for saw table, 10” ripping fence, adjustable cut off miter gauge, motor-specifications TABLE as above, 1! TILTED FOR BEVCLINC to 2 inches wide ~” endless leather belt, wood pulley, plug, 6” buffing wheel, sander, saw guard, and 2” Height 714”, shipping weight, 100 lbs. (Only $12 extra for Planer Attachment ti Price, F. O. B. Phila.) 8 ft. cord and emery wheel, 6’ $35.00 F. O. B. Phila. 39” 3 jaw drill chuck, 5” dado insert. > fit on table top. Can smooth pieces up Send today for our attractively illustrated 4-page circular DADO HEAD ATTACHED ~~ FOR GROOVING a Ee oe 1102 SOUTH 2np ST. PHILA,PA. Ask for Keds by name They are not Keds unless the name Keds is on the shoe Better Than A Brush The Lacquer-WellSpray Gun I for all brushing brushing Duco. Dozens of Uses | vequers including I r your a ito screens, et Make your | ol rniture like Ww Change tanks and use | tt ing or t h up w k, et Sp id as plant or disinfectant spray Sturdy, lasting service, q lity mace Sent postpaid any- where in U. 8. upon receipt of only $2.00, extra tanks 25c each THE LACQUER-WELL SPRAY COMPANY Dept. 2 2012 East 105th Se. Cleveland, Ohio 7 Ford & Chevrolet ' Ae STOP CRANKSHAFT END- PLAY! end- play without removing motor frou’ for Chevrolets, Ask your dealer or sent prepaid by ADJUSTABLE BEARING co. * Dept. P, 405 Virginia Ave., indianapolis, ind. youn FORD Into The “LARK” $500 Red-i-Kut life Class—Snap size patterns Eliminates mar — ous sure-fit / 38-inch Easy Riding Seat and new manual of other distinctive eport body patterns rom “$3.5 u g-Lo’ srona, Tops and Windshields. IRDE R Bit iT Now KUEMPEL COMPANY, 91 aa Bidg., , GUTTENBERG. 1OWA MOTORCYCLES Price $10 and up purchased through our Co-Operatiy Plan for as low as $! and $1.00 per we | Harley-Davidsons Ace | Henderson and Clevelands Send ten cents for Bulletin A es shipped to all parte of the | WALKER- INDIAN CO., 78 “Brookline Ave., BOSTON | down C-A ADJUSTABLE BEARING corrects and prevents ies. Easy Fe natal Pm yak jrop pes For Fords, $3 75;

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POPULAR MECHANICS ADVERTISING SECTION The Worlds Most Amazing, Gun — and America’s Original ccurate Genuine Compressed Air Rifle It’s the straightest shooting, hardest hitting most accurate compressed air rifle you ever saw. Unlike all others. Shoots regular in- expensive air-rifle shot. Ideal for target practice or small game. Ab- solutely safe. $E00 Postpaid or at your dealer's Force Desired One stroke of the pump gives light penetration. Two strokes a little more, Six strokes of the pump drive the shot clean igh a half inch plank. the tremendous con- ed shooting force as trated below. Picture ; shot imbedded in will thre “*T amenclosinga —e od tan endany cadena . Leer- tainly recommend the Ben- jamin very highly. A few days 0 [ saw a squirrel in the of a high tree. I fired brought him down with a bul- let in the back of the shoulder. For any boy that likes hunting like me, he ought to ge a Benjamin. Norman Gile, Braintree, ‘ad ' Please send me two new vaives for my Model E Ben- jamin. The gun has been in use for 12 years and this is Sullivan, Missouri “I take this ——_ to congratulate you on your jamin Air Rifles for they are the only make which gives such marvelous results. Albert Stins, Port aa Prince, Haiti, W. 1.”" No Springs to Break or Weaken The Benjamin is not a toy. Yet it is safe for boys to handle. Itis the one and only It is as natural for a boy to want a gun as itis fora wing power of pene- Nocleaning required. The njamin is always ready to shoot. Accidental dis- charge impossible. Noth- ing togetoutof order. No complicated mechanism to jam or springs to weaken gun for boys who have passed the pop-gun stage but whoare not ready to own the more dangerous powder shooting run. Take-down walnut stock. Nickel plated barrel. Guar- anteed for one year from date girltowantadoll. Hereisa gun for a Xmas gift that is abso- lutely safe, yet will delight any boy who loves to hunt and wants a real gun. If your dealer cannot supply you, order direct from factory. Sat- isfaction guaranteed. Use coupon, of purchase. tration using from one to and break. Retains its er e ° i six strokes of the pump. shooting force for years. Benjamin Air Rifle and Mig. Co., 645 N. Broadway, St. Louis cLIP BENJAMIN AIR RIFLE AND MFG. CO, 645 N. BROADWAY, ST. LOUIS, MO. Enclosed find $__________.....for which please send me 0) 1 Benjamin Air 0 3 Ibs. Air Rifle Rifle for $5.00 Shot for $1.00 0 1 Free Copy of 0 1 Free Benjamin “The Shooter's Art” Target (Check Items Ordered) Get your copy of the “Shooter’s Art” a dandy book that tells all about shooting. Shows how to hold and aim your gun, how to hit moving objects and how to be a crack shot. It is FREE. Mail coupon for your's to-day.

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POPULAR MECHANICS ADVERTISING SECTION Brings YourChoice 10 MONTHS PAY ~ for Christmas... ee a ao WE DOo— Upon arrival of your order, we will open a 10 month Charge Ac- —— —— S WHAT YOU DO-— Send one dollar with Name and Address, ar- ticle desired and brief note telling us some- count and send selec- thing about yourself. tion for approval and Simply state: (1) how 15 DAY RIAL. If long at address; (2) satisfied, pay balance age; (3) married or in ten equal monthly single: (4) name and payments; otherwise address of employer; return and dollar will (5) mature of work: (6) be refund No Articles solid to persons under 20 years of age. strictly confidential— no direct inquiries to 1 aa A-AA-1 Blue- White Diamond io dies ring, Tie Waite Got, Batter. a $1. with order, $5.05 oanath. B-The May Flower Beautifully carv- $i.in ith White Gold: AA-1 Bie. amond. Mm ag $4.90 a month. C-Bo not design for ladies; 18-K White y Gold: AA-1 Blue- White Dia- mond. 50 $1. with order, 3.86 a month. Birds: EK Wh t Ring-Motif of love birds K White Gold; AA-1 is va wt with - 9 $4.40 & month. Ring « 18-K White Gold evs and fore! design: Three AA-i Blve- White $39.50 $1. with order, $3.85 a month. F-Low Solitaire; 18-K White- Gold; A-1 Blue-White Diamond. $32.60 $1, with order, $3.15 a month. G-14-K Green Gold filled stra watch, engraved, guaranteed i + 6 movement, radium nomerale ands. ". with order, $2.65 a month. _ , C + 27° with ribbon and expan- QD tion bracelet. 15 Jewel movement. $45.00 $1. with order,$4_40 a month. D NEW YORK , SLY To any adult interested mm (es eee ing a ciamond watch other articie of feyeexs we will sone. tres ot charge and obligations this bookiet snceranes | is colors -- Masterpicces of t oF eed art. 10 months to pay on everyth Powerful / Magnetic Sharpener, Amazing New Scientific Invention / Sharpens All Razor Blades Instantly / By Powerful Magnetic Force / No Moving Parts! Nothing to Wear! Guaranteed a Lifetime! AGENTS WANTED’ The SuperKeen Co., Inc. Dept. S-6 Salisbury, N. C. Lathes $6.00 to $75.00. Largest line of small lathes in America. Send four cents for 24 page catalog of lathes, drill presses, bench saws, jig saws, band saws, etc. SYPHER MANUFACTURING COMPANY Dept. D Toledo, Ohio Make “Big Moncy fas sell American Radios and § ies. ~ A advertised, high quality merc qandice at wholesale. Big profit on eve ery sale. No capi- to wt est. Nostock to carry. Order direct My Liberal Offer and ales Bis tee er and also Big 132 ‘and Guide—* “How to Sel! Ra dios’ —Syeo. of Bargains—all latest in Radio. Write today. AMERICAN AUTO & RADIO MFG. CO. HARRY SCHWARTZBFRG, PRES. 66 American Radio Bidg., Kansas City, Me, E GIVE YOUR FILMS A CHANCE! They deserve it. Send for Sample See what good prints look like. Ask for prices. FRANK SCOBHE, 43-D. SLEEPY EVE, Minn. 0° 625a Daj! Selling Freshly Roasted Peanuts Wherever you find a crowd, | savory peanuts and crisp, s' popeorn are in demand. Set up a Iing Machine anywhere — in stores, at ball g races, fairs. Profits 250% Machines little room; are easy and inexpensive to oper Barbecue machines, too. Write now for Free Cat The Kingery Mfg. Co.>*ehieinwians ovo

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POPULAR MECHANICS ADVERTISING SECTION

The MODERN Blow Torch uses Prest-O- Lite Gas only --- no compressed air or } oxygen is required, the revo blow torch attaches to any Prest-O-Lite THE PREST-O-LITE COMPANY, Inc. Ss bet ea New York INDIANAPOLIS San Francisco peaantaln, dees “inty ional ture mentioning the In Canada, Prest-O-Lite Company kind k 8 d of Canada, Ltd., Toronto, Ontario ind of wor you do Unit of Union Carbide and Carbon Corporation with blow torches.

nufacture and ll kinds of s |} and - made ITALIAN ACCORDEONS, the world. uarantee Our lower than er maker's. Free instructions to Write for FREE RUATTA SERENELLI & CO. 1014 Blue Island Ave., Dept. M Chicago, Ill.

¥ you can convert that old Ford a. pm »a useful farm tractor without g any Ford parts. We furnish ; traction wheels, drive gears and . ry axle and mountings, ready : St 000.00 a year Runs on all 7 “~ireular fuels Simple, sturdy — “3 Write for circula most powe — - least expens 3 H. P es; 3-in w . Pr ( THE ADRIAN SPEED LATHE Wilde os dey Tor vuRbit Gosk. sind dl; tySem, gp ond Pome ir wood and light metal turning. 7° swing, 17’ centers Witte Engine Works H. G. 5 so 1749 Witte Bidg., K City, Mo. it. G. CRANE, Adrian, Mich. 1749 Empire Bidg., Pittebure, Pa.

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146 POPULAR MECHANICS ADVERTISING SECTION Maydole Hammers The choice of three genera- tions of skilled American craftsmen. Heads press-forged of finest tool steel. Handles of clear, second-growth, air- seasoned hickory — put on ‘‘for keeps.” There is a style and weight of Maydole for every service—each with the un- equalled Maydole ‘‘hang’’ and an in- built resistance to hard use and abuse that means true economy. Write for interesting and useful Pocket Handbook 23‘‘L.”’ It’s free! . YOUR HAMMER, SINCE 21843 aydole Hammers The David Maydole Hammer Co. Norwich NY 1167 \ A NEW DIAGONAL PLIER_ for heavy ey. . For the man who use plier and wants on can use day aft« heavy work and able to depen this new ideal is just a size, it isag in st and rt Car \ No. 742 7-inch CRESCENT TOOL CO. 210 Harrison St., Jamestown, N. Y. Wrenches—Pliers—Screwdrivers—Chisels Punches —Hacksaws— Snips— Auger Bits— Nippers—Electrical Tools CRESCENT 1! & PROTECT YOUR TOOLS FROM THEFT Write with electricity any name or design on the hardest and finest tools and instruments, or any metal, like writing on paper with pen or penci! Complete 3.50 — Prepaid Anywhere Interesting fllustrated Write today. ohh co wanted. ARKOGRAF CO., 1171 E. Stark St., Portland, Oregon PARKS Manual Trainer ARKOGRAF | 77 circular free. Fi Without R Motor L/ For your home shop! Combination 11-inch band saw a 11-inch wood lathe. If you have a knack for wood worki: you can turn out first-class bridge lamps, cabinets, furnitur ship models, ete., in fast time. Get one! Wrte for specification circular THE PARKS WOODWORKING MACHINE CO 1500-40 Knowlton Street Cincinnati, Ohio CANADIAN FACTORY: 208 Notre Dame East, Montreal, Canaeds

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POPULAR HACK SIMONDS HACK SAW WILL DO IT BETTER AND FASTER MECHANICS ADVERTISING SECTION SAW BLADES WHATEVER THE METAL CUTTING JOB, A 147 OR both hand and machine work, Simonds Hack Saws are preferred by experienced mechanics. They know that Simonds Blades cut easier and faster—that the teeth will not shell—and that the high 4 4 sten content gives longer life For power saw use, specify Simonds All-Hard Blades—for hand use, Simonds Hard Edge Blades. But be sure to specify “Simonds” and thus secure the advantages of a near-century’s experience in the manufacture of fine cutting edges. SIMONDS SAW AND “The Saw Makers’’ Fitchburg, Mass. AND SERVICE SHOPS IN PRINCIPAL STEEL COMPANY Established 1832 BRANCH STORES CITIES Crescent Wood — Working Machines are neat in design, substantially built and are intended for hard, continuous service ers of wood working machinery who appreciate quality slways stigate ( t ma 1 « “ Send today f jars of Band Saw Tables Se Feed Rip 8 Sha s, Joit V Ww d W ork Planers, Planer and M Disk ¢ d Cut O aa Swing Saws Borers, H ( i a Waiversal W i Work The Seneut Machine Co. sou Oe ia Se A. > 17° Over all, 4” Swing, 11” Centers. Shipping weight 13 Ibs. Largest line of small Lathes in America, Send 4 cents for 24 page catalog of Lathes, drill REAL presses, bench, jig and band saws, et« presses, bench, jig and saws, ete LATHE SYPHER MFG. CO., Dept. L, Toledo, 0. The One-Profit WITTE Log and Tree Saw | FOR A Aon Low PRICE © ‘Dinleg) EASY TERMS MPLETE OUTFITS—everything you need for working in timber. wde a day Change to tree saw in 3 minutes F R E E > imply send name for NEW CATALOG, new Lower Prices and offe 3 Hours Shipping Service WITTE ENGINE WORKS 7749 Witte Building KANSAS CITY, MO. 7743 Empire Building PITTSBURGH, PA. Saws 15 to igihem Bilas TOOLS/, to Any Test We Stand Be Tools of phenomenal strength and wearing qualities. . You ean drive rivet punch through auto frame Cut shaving off axle shaft with bearing scraper . Lock our wrench with ar eee wrench and bring pressure until one breaks . Drive %&’ chisel through 144° machinery stee! Your money back if tools fail to meet these tests. CORNWELL Quality Tools Hand made of finest Swedish Charcoal ty Molybdenum Steel manufactured to our amc us Cornwell formula. Forged, heat treated, hardened and tempered in oil T drop forged and case hardened. Free Booklet— Mail the Coupon Booklet describing amazing tests of these tools will be sent upon re- ge quest Our Money Back “a = uarantee is your as- Pe The Cornwell surance that these tools willdo everything Quality Teols Co., Dept. R, Mogadore, Ohio. ate at Cuya oga Falls, Ohio. ~ ~~ we claim, ae Send me new illustrated catalog with wow prices on full line of Cornwell Hand - Made Tools Where Employed Name Addres City State

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148 Fastest GET MY 2\MKe GREATEST [) “AS. ey Log Saw ve ay timber, etc. Try 30 Days POPULAR MECHANICS ADVERTISING SECTION Used by The United States Government It's easier, now, than ever before to own this fastest- cutting, easiest-mov ed, most powerful Log Saw. you can make big money sawin; WRITE TODAY OTTAWA * Ce won 7 5 Cords Now, BS reer Sev ice, OR FULL DETAIL Make Big Money—""! is cord brings owner $45.00 a day. Go shingle } puts the OTTAWA Working For You! — ONE WHOLE MONTH OTTAWA at your own sawing saw shipped on trial only— FRE to use the Every Backed by 10-Year Guarantee 1745-L Wood St., Ottawa, Kans. Send me your name and address on a postcard today for my “Wood Sawing Encyclopedia.” HARRY OVERMAN, Pres., OTTAWA MFG. COMPANY 1745-L Magee Bidg., Pittsburgh, Penna. into the wood business Don’t let the lack of ready money step you Remember, we sell on very easy terms. Te Save You Freight—and get your ma- hine to you a few days after you order I ship from factory or nearest to NINE BRANCH HOUSES 350 Cuts a Minute! Now you havea log -in @ few seconds it’s all sawed up— hard wonderful new edition of the Wo, ye j 98Win a sure to investigate—it will help you to make big money. Lay, ‘lon, ne ta | you of For Real ‘‘Woodworking Efficiency’ The handy man about the home can dojmany more jobs with our This machine does it all. WORKER $156.00 complete with motor Your home shop is fully equipped when you have this machine. It’s a whole workshop in itself. Nothing else to buy. KORNAU MACHINE CoO. Station CINCINNATI, OHIO Making Big» Money | Is EASY when you are “on your own.” you earn—have steady, year oid work ay-offs, no lost time. This is open to y floor surfacing. Do you want it? The “Ar ican Universal” electrically driven floor ¥ facing machine surfaces new and old f better and faster than any other metho \ i makes the most money for its owner YOU can get into this big pa business with almost no capital experience necessary Big | Big Opportunity. Write quich the facts ocke | The American Floor ~~ Surfacing Machine Co. 523 So. St. Clair St. TOLEDO, OHIO You can get yourself no Better Christmas Gift th. A Gerstner Tool Chest Ideal for Toolmakers and Machinists Write for free catalog Aerilacr iSent. 448 Columbia St., DAYTON, OHIO x i > OEE = Anv length 2 to 8 ft 200 lineal ft Measure Hard-to-Reach Piaces with ” THE SPEEDY RULE indlepeneaite 3 for accura tside me MASTER SLIDE RULE santa Sides no f If not at PR ny sent postpaid. Dealers a Agent Write for attr BUILD YOUR OWN ERS CLOCK || We furnish blue prints, finishing material and in- structions. Buy the works, dial, weights and pen- dulum from us at surpris- ingly low prices. ou make a fine prot building artistic cloc for your friends. Plain Works as Low As $5.00. Others with Chimes At All Prices. Ask for Our Free Cat- alogue and Offer of Blue Prints. American Chime Clock Company 1670 Ruffner Street “* PHILADELPHIA Write for my Big 1928 Radio Catalog —just off the press. Thousands of marvelous bargains in nation- a ie ally advertised goods. All the encyclope- LATEST IN pee wat i » Radio, equipment. Lowest whole- giecn trouble finding. sale prices. FREE Log and Call Book and Cat- alog. Get your copy to- day. Send postcard now! American Auto & Radio Mfg. Co. HARRY SCHWARTZBERG, PRES. Dept.2¢3 American Radio Bidg., Kansas City, Me. 3 Palmolive Shaving Cream | “5 New Delights for Men” BENC WADE AMATEUR MECHANICS, REPAIR SHOPS, A real machine too! for the home am bench—capacity 4” dia. x 12” length. cision & Materials. Turning—Facing—Boring— Drilline—W indin eet. Slide-rest has travel entire length of bed leadacrew inside bec oa, $28.00. No.2 LATHE fFie'ceroww oe he, Complete line of Plas. at A y- low prices INVENTORS, STUDENTS For Metalt— Wood Cor iecurate Strong— Quiet 1 Lathe, plain heed Extra for lathes with 18 inches be Write for free catalog 120 Liberty St. New York —Thread Cuttin back-geared headstock, $58 Dept. P ey i | 200 Seem

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CO ——— Send 10c for this Kingsbury Sedan No. 345 Length 13% in. Price $3.00. West of Miss. and in Canada slightly higher. REAL? TOY? WHICH? j ho, picture certainly looks like a real ir, doesn’t it? And so does the toy it- this up-to-date model of a modern rt sedan. Every detail is just like life e coloring, accessories, spare wheel, k, bumpers, lamps, ete.—even the d! For it is equipped with a strong spring motor that runs fast and yg. Your toy dealer will be glad to show i this Kingsbury novelty. If he is not upplied, we will fill your order direct. for free catalog. KINGSBURY MFG. COMP she 83 Myrtle St.,. KEENE, N KINGSBURY | Moror DRIVEN Toys f (@4 \ Disc Wheel Eraser - wavs “best sellers.” W rite for our Propositior Beautiful HOUSES $900 " and BUNGALOWS CAN BE peed FOR AND uP & ston Madben 68 =e i is ot dollars. One of the prehensive books y any ar tect . — N ff press. Nearly 6 _ ii —_ = rorographs of Colonial FREDERICK H. GOWING $ es at ‘to ARCHITECT Sent postoaid for $3.00. 101 Tremont St.. BOSTON, MASS. | ELECTRIC trations BREET CUArS , W rite today for von ‘opy. Save wR direct from M: otadiadtanen. aR » Middleman’s Profit OUR | ap E CIAL: 8 Room Electric Set, ready to hang, $24.50—Other bargains. UNITED LIGHTING FIXTURE CO. 83 Flatbush Ave., Dept. M, Brooklyn, N.Y. i | | | | 200 Fifth Ave., PIN A DOLLAR BILL TO THIS zenuine leather 5- c Id | P Auto Li | ige Cards. et Ma- Shrine Emblem n in gold free. Your ther stamping 35c r line ust accompany order We carry smpary MASONIC free catalogue ‘ f Book Me mnitors N i P.M., of I odge Supplies We Have Been in Busin Years! REDDING & COMPANY Desk P. M. NEW YORK ss © POPULAR MECHANICS ADVERTISING SECTION 149 Dr. HARLAN TARBELL Masten oF MAGIC at Home ~ By MAIL Big Stage Illusions Secrets of the Orient Master Illusions frora Eu- rope, India, China, Japan. Guarded secrets of the Orient—over 150 tricks from small effects to Big Stage Illusions, with nearly 1500 illustrations, that and more is what you get in the Tarbell Course in Magic! Read This Great Endorsement Dr. A.M Wilson, Editor of the Sphinx, Official Organ of The Society ot American Magicians, pays the Tar- bell Course this tribute: **The greatest work L Magic ever cemeenes and will mark an epoch in Ma greater than the reve- lations of Robert Houdini, Father of Modern Magic, 60 years ago.’ Money-Back Guarantee Protects YOU The first The Tarbell course in Magic protects you with an Iron Clad Guarantee to refund your mon- ey if you are not satisfied. You can’t lose. You have every- thing to gain. Get Started on the Road to Big Money You need not give up your job You don’t have to be a “professional’’ to make big money. You can make nice money entertaining on-the-side as a semi-professional, or if you want to, you can become a big Magician, make big money and enjoy fame and glory. Learn ali the great limi i opportunities that are in store for you. Mail coupon NOW and only Course in Magic ever offered to the public teaching real professional Magic! Mail This Coupon NOW! Tarbell System, Inc. 1926 Sunnyside Ave., Studio 93-59, Chicago Tell me about Dr, Tarbell’s new and simple system by which I can learn the secrets of MAGIC. Also tell me about your Special Price and Easy Terms Offer. No obligation on my part. Name._- CO ee ee

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POPULAR MECHANICS oon =LOETIS == DIAMONDS 100) Genuine Diamonds Guaranteed CASH OR CREDIT~ Beautiful Diamonds for Christmas! Diamonds for Christmasat a great saving! Dazzling gems of fine blue white color—all special importations—ex- uisitely set in mountings of solid 18-k white gold. Buy direct from Loftis, the importer, and save what others pay to middlemen. Order now—direct from this adl Satisfact ‘uaranteed, 7 eC money back. Goodsseat \\Z, ; a Outtits, $8.86 up, Job Presses $11 up, Rotary $149. Card fw” Cutters, $3. Save money. Print for others, big pr« ts. = Alleasy rules sent. Write for catalog presses, type, pa fee cards, ink etc. THE KELSEY CO., K-37, Meriden, Sonn.

pos if vest sent.

WANT a new busi: profession of your with all the trade you attend to? Ther becom: afootcorrectionist, in a few weeks earn big income in service fees,—not me nor chiropody—easy terms for home training, no further ca! needed, no goods to buy, no agency. Address Stephenson Laboratory, 1 Back Bay, Boston, Mass.

RAZOR Sreee ey . Handy shaped Blade makes this k men and farmers: Ayn ng Le = handle. German silver finish: bla razor steel and warranted. mentmsme: <i A Genuine $2 Knife for $1.18 Postpaid r mechanics, light but strong; i easily. Stag hand — from Direct at Factory Prices : Sample $1.18 3 for $3.00 Postpaid : oe Hand Forged Razor Steel Blades Send for our 100-page FREE List al “HOW TO USE A RAZOR: Maher & Grosh Co. 106 A St., Toledo, Ohio

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= le 66 (Sl mie POPULAR MECHANICS ADVERTISING SECTION Automatic Concertina Played With Inter- changeable Rolls. Musical Entertainers wanted every- where and earn big money at Mov- es, Vaudevilles, Cabarets, Restaurants, Inns, Lunch hutings, Dances, Weddings, Fairs, Parties, or travelling sall year. Entertainers charge $10.00 per evening. Our MATIC CONCERTINA, played with interchangeable »pportunity, to make big money or steady side income iy perfect in 30 minutes Songs, Dances, Operas, Marches Fox Trots, One Steps, etc. without a faint idea of music Beautiful tone and melodious as played by artists. The rOMATIC CONCERTINA possesses a charm, which no one The player is actually playing, without any study Attractive professional cards furnished without an income for lifetime. AUTOMATIC CON- > used in Song and Dance Acts on the stage. Three Concerts, and Paid Entertainers, from $30.00 to Descriptive circular number 2 mailed free TREASURE SALES COMPANY '208esten. Road NEW YORK GENUINE FRENCH BRIAR PIPE SET Only $2. 75 Magnificent smoking out- fit, beautifully polished and engraved, imported when the French franc was low- est. Manufactured to re- tail at the $10 price stamped in each box, we are offering them to you direct from our wholesale dept. at only $2.75 Set consists of two genuine French Briar pipes treated to require no breaking-in Amberlite mouthpieces fancy Amberlite cigar and cigarette holders ach set is fitted in a beautiful strongly made plush and silk- lined case. Complete, $2.75. Pay postman $2.75 plus postage on delivery Send No Money Money refunded if not satisfied. H. & H. SALES CO., 81 E 81 Bowery, Dept. P 51, NEW YORK. N. Y WHITE FLAME: BURNERS | make your old kerosene lamps and lan- terns give a brilliant white light better electricity or gas Doubles your light. Saves oil. B nO MANTLE To BREAK. Guaranteed Safe and Reliable. Delights ay w_for complete sample postpa 0 cents, or $1.25 Money Back if Not ~~ iat Liv Res resentatives Wanted. Exctusive Te —— WHITE FLAM LIGHT CO., 68 Clark Bidg., Grand Ravi Mich AGENTS PROF PROFIT GENUINE GOLD LEAF LETTERS guaranteed to never tarnish. Anyone can put them on stores and office windows. [I:normous demand, large profits. Paul Clark says: Smallest day $28.70). R. L. Reel made $920 in two months. Write toda: for free sample and liberal offer to general agents. METALLIC LETTER CO., 433-B N. Clark St. CHICAGO New FREE cook quotes Reduced Factory Prices. S Year Guarantee Bond on Stoves Ranges, Furnaces. 200 styles and sizes. Beautiful pore elain ename) ranges and combination gas and ranges. Mahogany porcelain enamel heating stoves. Cash or easy terms. 24-hr. 8 ments trial. 360-day test faction guarante years in business. 650.000 customers, apa today for FREE “a Kalamazoo inom Co. Manutacturers 391 Rochester Avenue Kalamazoo, Mich. “A Kalamazaa —-» Direct to You Be up-to-date — know the pleasure and convenience of having one in your home. You'll be amazed at the uses everyone in your household will find for this real Under- wood typewriter. Every member of the family will use and enjoy it! Don't send a cent — but do get our big special offer—our valuable book on typewriters and typewriting—FREE. Any One Can Learn to Operate a Typewriter! You car learn to write on this standard-keyboard machine in one day; it's so simple that even a child can use it. A weex after the expressman has brought it, you'd feel LOST without it. A trial will PROVE it— and doesn’t cost you a penny! SPECIAL FREE TRIAL OFFER We don't want a penny now. Nor any money at all unless this proves the type- writer bargain of your life. The trial is FREE. If you buy, our easy terms make it a pleasure to pay. There's no excuse now, for not owning a typewriter—and the finest make! We include all tools, a cover, etc., all complete ready to write. Write us now. Deal direct; we are the largest factory of the kind. Our plan gives you the opportunity of a thorough trial before you buy. You run no risk whatever. You start to pay for your typewriter AFTER you have found it the only machine for you! But get the facts before this lot of machines is all in use. Clip the information coupon before you turn the page. It wi!l pay you! Note the very useful book you will receive free! Write for full particulars at once. The Greatest Typewriter Offer Ever Made If you know typewriters, you know the perfect work and the ease and speed of a Shipman Ward rebuilt Underwood typewriter. New machines are guaranteed for only one year; WE GUARANTEE EVERY ONE OF OUR MACHINES FOR FIVE YEARS! If you have never owned a typewriter, start with the finest! You can try this one at our risk. But, the time to act is NOW. Don’t miss out on this present bargain offer whereby you can get this genuine Underwood at a big savings. Don't do longer without the convenience of a typewriter. FREE! Get our catalog free; lowest prices and terms. A manual free, too; valuable instruction for learning rapid typing. Mail Today! Shipman Ward Manufacturing Co., 2129 Shipman Building, Chicago, III. Please send me your Free Trial Plan and Typewriter Book, together with your special offer on prices, terms, free course in Touch Typewriting and also how I can make money with this typewriter, without obligation. This is not an order. Name Street or R. F. D. City State

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BANJO HE Gibson Mastéttone; With its brilliant, snappy, yet always musical tone, and exclu- sive easy-playing features, make it the choice of leading professionals and amateurs alike. YOU can learn to play ie quickly, easily. Send coupon now for new FREE Book, illustrating and describing Gibsons, today’s most popular instruments. Easy Payment Plan enables you to enjoy a Gibson immediately. Get the facts now; no obligation. Mention instrument: Tenor-Banjo; Plectrum-Banjo; Gui- tar-Banjo; Mandolin-Banjo; Mando- “Min; Guitar; Ukulele, Surprise and puzzle your friends with magic chemical tricks; make ink, dye cloth, test water and soil; write secret letters with invisi- ble ink; pour blue, brown and black liquid from a pitcher of water. All these and many more chemical stunts are easy with ChemCraft Junior. It’s the best box of fun you ever had! Get yours now. ONLY 25c POSTPAID A : FREE agazine 0 2 Dim CER = FS 5») Cc i nites aewenl SU Ste) ee — of the ChemCraft Club to every c ea boy who writes for it now. Full ne — \ of new ideas and chemical a [a stunts. Ask for yours! Pt : The Porter Chemical Co. 113 Summit Ave. HAGERSTOWN, MD. — . a THE PORTER CHEMICAL. COMPARY POPULAR MECHANICS ADVERTISING SECTION | | We own our own steel mills, roll our own sheets, make them into high-grade REO METAL SHINGLES, Sidings, Ceil- ings and Roofings of every type and style for every kind of building. We control every operation from raw ma- terial to the finished roof and we sell direct from our fac- tories to the user. Not a dollar to divide with anybody but the customer! You get better value for less money. OUTLAST THREE ORDINARY ROOFS EDWARDS METAL ROOFS are weather-proof, light- ning-proof, he fire-proo!| . gaivanizing bends with the metal. No tools required. LOW-COST ALL-METAL GARAGES Any size. Any style. Port- able. Ready to erect. Com- plete with frames, doors, sash and hardware. Ornamental, durable, economical. Blue-prints and complete instructions FREE. Write today. Get our low prices and Free Samples. Ask for Roofing Book No.150 or for Garage Book No. iro. THE EDWARDS MFG. CO. 1200-1250 Butler St. Cincinnati, O Sport Bodies for Fords AT FACTORY PRICES! act $3950 Prime I made £250®% extra in 3 months with my TORIT handy Torch THOUSANDS OF MECHANICS a in the U. S. and Canada are doing the same— Cashing in on quick, easy profits. One man writes, “I received my Torit Torch in the morning and by night had made an extra $7.50 on jobs I ordinarily turn down. The Torit has already paid for itself and is now the HANDIEST TOOL IN THE SHOP.” Beats anything you ever tried for soldering, lead burning, radiator repairing, etc. TH! 28 LARGE FLAME TW 20.FOR RADIATOR CGATTERY WORK — TIP 23. FOR MBATING eeree- @ " 5 USE wiTH R ad ~ SOLDERING COPPER st wnt tis moss WHS 20628 PAT. JAN. 5.1926 Uses Acetylene Only. No oxygen or air pressure is required. ‘Tips suck in air. Simply connect to Presto suto tank, light gas, and outfit is put to work. Consists of torch, 4 tips, soldering copper, 5 ft. rubber $75° tubing, tank connection andinstructions. Price ae — WELDING &£ MFG.CO., 177W. 3rdSt., St. Paul, com, Audio B Elin structi Make- wr) Induct 174

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CSN POPULAR MECHANICS ADVERTISING SECTION RADIO SET BUILDERS Here’s Information You Can Depend On Leading radio engineers have prepared authori- tative design manuals ning much original information of cont: greatest practical value to those inter- ested in improving the operation, better- ng quality of reproduction, power equipment to their sets. Audio Amplification, Sent upon receipt of or applying B Eliminator and Power Amplifier Con- struction. Send 10 cts. Make-Em-Better Sheet, showing use of RF nd AF Chokes in 17 popular circuits or your wn receiver. Send 5 cts. Inductance Units Bulletin, contains RF Am- and coil formulae. Send 10 cts. {ll four sent on receipt of 50 cts. fia fltoG: Mar Orrice: CANTON, MASS. Manulacturers Since 1882 Factortes at Canton and Watertown, Mass. STARRETT MFG. CO. [RADIO PANELS BAKELITE ~ HARD RUBBER Cut, drilled and engraved to order. Send rough sketch for estimate. Our complete Catalog on Panels, Tubes and Rods — all of genuime Bakelite or Hard Rubber. Mailed on Request. 524 S. Green St. Chicago, It. PRICES SL On Standard Radio Products Now ready! Harry Alter’s price list for December. Saves you money on every requirement—not merely ona few “bait” bargains. Check and prove my un- heard-of values. Test Alter’s ““Minute-Man” shipping service. Send tor this big catalog—free. CNOTE: We Sell to Dealers Only) Ghe Harry Alter Co. 179@ Michigan Ave., Chicago, Il. 153 ou can candle an egg-but not a battery ' . —_— HERE isn’t much difference in the size of shape of batteries. And you can’t tell how good they are before you use them. Q If you could, one element alone would win your preference for Burgess. That element is Chrome. Q Chrome is the preservative that maintains an abundance of unfailing energy in Burgess Batteries—long after most dry cells cease to function. The black and white stripes are individual marks for identifying Burgess Chrome Batteries. Buy them for long lasting, dependable performance! —the preserving element used in Chrome leather, metals, paints and other materials subject to wear, is also used in Burgess Batteries. It gives them unusual stay- ing power. Burgess Chrome Batteries are patented. cAsk Any Radio Engineer BURGESS BATTERY COMPANY General Sales Office: CHICAGO and Offices. Niagara Falls and Winnipeg BURGESS BATTERIES Canadian Factories i vei i& legit wa : BET7ER* WITH: DRY- BATTERY~ POWER RADIO: IS:

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If you are tions in put an end they cause endorsed CaASV >» or reflex R. i Dept. 65C, Phasatrols Reg. U. 8. Pat. Off. A True Balancing Device for Radio Frequency troubled with R. F. your set, you can positively PHASATROLS to the squeals and howls with Phasatrols. make tuning easier. and used by experts. Very to install in anv F. Write for free hook-up circular for any set or circuit. 175 Varick St., POPULAR MECHANICS ADVERTISING SECTION Licensed by Rider Radio Corporation Pats. Pe nding. Patented 5-2-'16 4 at ented 27-"2 Don’t Endure Oscillations! Amplifiers $2.75 oscilla- tuned, untuned set. New York, N. Y. The man who studies gets ahead. Popular Mechanics Press will advise you what books to read to advance in your trade. 200 East Ontario Street , Chicago, Illinois. TISIT COLD SOLDER No Heat or Soldering Iron Required aluminum, iron, wood, and most household articles Indispensable for radio or automobile owners TISIT is a household necessity Re p 1irs It can be used for nearly any kind of a repair job It is applied cold with a stick and dries in 30 minutes Not affected by heat or acids. The most inexperienced person can use it with satisfaction. TISIT makes soldering a simple job 50ec at your dealer's. If he can- not supply you, send us 50c and we will ship you a bottle post- paid Money back if dissatis- fled * ow TELLER | (oa -: ner “ Ly LETELLIER LABORATORIES, Inc. 185 Main St. E. ROCHESTER, N. Y. Mechanical Model $18.00 Electrical Mode! $60.00 (Add 10° west of Rocky Mountains Write for § illus- trated descriptive circular Imagine the pleasure of tuning your radio wit having to get up once all evening! rurn set or ‘off,’ tune, regulate volume—from your easy chair! Easily attached to any single, rem¢ . dial receiver in a few minutes ALGONQUIN ELECTRIC COMPANY, Inc. 245 Fifth Avenue, New York City AM Yon UW — TRADE MARK REG. U. S. PAT. OFF REMOTE CONTROL Radio Tuning Unit From the “Big, Friendly Radio House” NEW 1928 Book offers finest, newest well-known sets; parts, eliminators, accessories at lowest prices. Dealers, set-builders,agents - WRITE for this CATALOG! _ 132 West Lake St., Dept. 39 CHICAGO, ILI show youa re power audi big new 1928 Catalogue discount sheet. 206 N. Standard parts and equi : money-saving prices, with disc ul profit. Electri it Phen graph—pick New A C tubes and transtormers—parts for at yequipment—short wave supplies—they ar Write f wr it t 12-hour shipment gu (Dan-AsheRadio Co} 10th St., St. Louis, Mo. Ao 436 col v=—at a, fz, r Indep

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POPULAR MECHANICS ADVERTISING SECTION HARRY ALTER'S MEW LOWER PRICES WILL AMAZE YOU ¢ Again Harry Alter challenges all competition bysmashing prices that were already the lowest known in radio. Staggering values in sets and parts of standard quality. Get my new December catalog. Write for it NOW. We sell to retailers only. WURLIIZER little Saxony (200 Years A tug ke, lived Hans Adam W arlitzer, Mester Viola Maker. Hiss was a gathering place oa the time, for he was 6 in yo bands of his eldest son, and for seven sovanced circuit. tee! chassis totall FREE Log and Call Book ane Big Row Cataiog—just off the press. Full of Send for your free copy now! Rac Sargains. American Auto & Radio Mfg. Co. HARRY SCHWARTZBERG, __ Dept. 262 American Radic Every Elect: ical Connection necd Solderall for perfect re ception The SOLDERALL CO.. co _. NEWARK NJ) NJ. Let meshowyouhowtomake big money right from the start. I've prepared a FREE book explaining ail details. First week’s profit pays for all equip- ment. You can get all the battery charg- ing business in your community with my Service Station Charger—it’ _— ahead inary Chargers—handles 50% to 70% more bat- explain everything—start you in a ness of your own and put you on the way g money. Write for FREE Book C. F. HOLMES, Chief Engineer, Dept.PM independent Electric Works, 5116 Ravenswood Ave., Chicago ions, down to the present , the descendants of Hans Warlitzer have carried on work. his Today in every Wurlitzer instrument will find a in ‘your Own Home OU may now have any Wurlitzer instrument for a generous free trial in your own home. Examine the instru- ment, show it to your friends, play it as much as you wish. No obligation to buy—no expense for the trial. We make this liberal offer because we want you to try for yourself these | wonderful instruments, the re- sult of 200 years’ experience in musical instrument building. Easy payments are your convenience. This is your oppor- tunity totry a famous Wurlitzer instrument in your own home. Send for Whokly New Catalog The greatest musical catalogever pub lished. Over 3,000 articles—every | known instrument described and illus- trated; many of them shown in ful colors. Gives you lowest prices and all details of Free Trial, Easy Payment plan. All sent FREE—no obligation Send this Coupon arranged to suit THE RUDOLPH WURLITZER CO., Dept. 1779 117 E. 4th St., Cincinnati scription of every known musical instrument. Also tell me how I any instrument in my No obligation Name Address City Instrument ..... (State Instrument in which you are interested) SSSSSRSSSSSE SEES SES ESs SeeT eee eee E Eee Send me absolutely free, your new Hlustrated catalog, with prices and may try own home and pay for it in small monthly sums a Copyright, 1927, The Rudolph Wurlitzer Co.

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POPULAR MECHANICS ADVERTISING SECTION Protect Your Ideas Take the First Step Today If you have a useful, practical, novel idea for any new article or for an improvement on an old one, you should communicate with.a competent Registered Patent Attorney AT ONCE. Every year thousands of appli- cations for patents are filed in the U. 8. Patent Office: Frequently two or more applications are made for the same or substantially the same idea even though the inventors may live in different sections of the country and be entirely unknown to one another). In such a case, the burden of proof rests upon the last application filed. Delays of even a few days in filing the application sometimes mean the loss of a patent. So lose no time. Get in touch with me at once by mailing the coupon on the opposite page. Prompt, Careful, Efficient Service This large, experienced organization devotes its entire time and attention to patent and trade mark cases. Our offices are directly across the street from the U.S. Patent Office. We understand the technicalities of patent law. We know the rules and requirements of the Patent Office. We can proceed in the quickest, safest and best ways in preparing an application for a patent covering your idea. Our success has been built on the strength of careful, efficient, satisfactory service to inventors and trademark owners located in every state in the Union. NO CHARGE for Information On How to Proceed The booklet shown here contains valuable information relating to patent procedure that every inventor should have. And with it I will also send you my “ Record of Invention” form on which you can sketch your idea and establish its date before a witness. Such evidence may later prove valuable to you. Simply mail the coupon and I will send you the booklet, and the ‘‘ Record of Invention” form, together with detailed information on how to proceed and the costs involved. Dothis NOW. No need to lose a minute’s time. The coupon will bring you complete information entirely without charge or obligation A NR ER EE A EES NE AROS

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POPULAR MECHANICS ADVERTISING SECTION \jy Patent Law Offices , Just Across Street }rom U.S.Pa fice Above is a view of my draft- ing and specification offices where a large staff of ex- r’ perienced experts are in ’ my constant employ. All drawings and specifications are prepared under my ventors eg supervision. Strict Secrecy Preserved munications, sketches, drawings, etc. n strictest confidence in strong, stee 1 files, which are accessible only to ed members of my staff. Feel free to me fully and frankly. Your case will personal attention. It is probable | can help you. Highest references. FI RST—clip the coupon and get my free Do THAT right now. Clarence A. O’Brien Registered Patent Attorney f Bar of: Supreme Court of the tates ‘ourt of Appeals, District of > Cc ourt, District of urt of Claims. Practice confined exclusively to Patents, rrade marks and Copyrights Clip this Coupon wd Mail it Plow/ CLARENCE A. O’BRIEN, Registered Patent Attorney 702 Security Savings.and Commercial Bank mane. Washington, D. C. Please send me vour free book, “ How to Obtain a Patent.” and your ~ Record of Invention” rm without any cost or obligation on my part. Name. cn ; Important: Write or Print name clearly.) Address AEE AT OTST AILERON

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POPULAR MECHANICS ADVERTISING SECTION PATENTS TRADE-MARKS -: DESIGNS FOREIGN PATENTS MUNN @& CO, PATENT ATTORNEYS Associated for 81 years with the Scientific American SCIENTIFIC AMERICAN BUILDING 24 WEST 40th STREET New York SCIENTIFIC AMERICAN BUILDING Washington, D. C. TOWER BUILDING Chicago, I/1. HOBART BUILDING San Francisco, Cal. VAN NUYS BUILDING Los Angeles, Cal. YW Books and Information on Patents and Trade-Marks by Request. Associates in All Foreign Countries.

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POPULAR MECHANICS ADVERTISING SECTION PATENTS vara Oo UR oO FF ER - FOR THE PROTECTION e OF YOUR INVENTION YOUR FIRST STEP. The inventor should write for our blank form—*‘RECORD OF INVENTION.’’ This should be signed, witnessed and returned to us together with model or sketch and description of the invention for INSPECTION and _ IN- STRUCTIONS FREE! Our Four Books Mailed Free to Inventors Our Illustrated Guide Book HOW TO OBTAIN A PATENT Contains full instructions regarding U. S. Patents, Our Methods, Terms, and 100 Mechanical Movements illustrated and described. OUR TRADE-MARK BOOK Shows value and necessity of Trade-Mark Protection. Informa- tion regarding Trade-Marks and unfair competition in trade. OUR FOREIGN BOOK We have Direct Agencies in Foreign Countries and secure Foreign Patents in shortest time and at lowest cost. PROGRESS OF INVENTION Description of World’s Most Pressing Problems by Leading Scientists and Inventors All Communications and Data _ Strictly Confidential. Interference and Infringement Suits Prosecuted. IMPORTANT TO MAKE YOUR CASE SPECIAL AND AVOID DELAY YOU SHOULD HAVE YOUR CASE MADE SPECIAL IN OUR OFFICE to secure protection, save correspondence and obtain early filing date in Patent Office. To secure special preparation of your case send $25.00 on account with model or sketch and description of your invention. Our Lawyers Practice in all U. S. Courts and defend Clients in Suits involving Patents, Trade-Marks and Copyrights OUR ORGANIZATION OFFERS PERSONAL SERVICE By Experienced Patent Lawyers, Solicitors and Draftsmen We Regard a Satisfied Client as our best advertisement, and furnish upon request, lists of clients in any state for whom we have secured patents. Highest References—Prompt Attention—Reasonable Terms = oe oe oe oe oe ee WRITE TODAYS! @ SS oe ee oe ee ee ee ee ee ee oe oe oe oe ree !' VICTOR J. EVANS & CO. COUPON Registered Patent Attorneys oe ee oe oe MAIN OFFICES: 792 Ninth St., Washington, D. ol : f i i New York Offices, 1007 Woolworth Bldg.; Philadelphia Offices, 518-519 Liberty Bldg.; ; Pittsburgh Offices, 514 Empire Bldg.; Chicago Offices, 1114 Tacoma Bldg.; San Francisco Offices, 1010 Hobart Bldg. - ' ! i Gentlemen: Please send me FREE OF CHARGE your books as described above. Address. . .

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POPULAR MECHANICS ADVERTISING SECTION Booklet Free Highest References aes Assured Best Results end drawing or mode! for preliminary xamination of Patent Office records. ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION Listed Patent Lawyer in the latest editions of the Rand-McNally Directory of Bank- ers and Attorneys, of Chicago, Ill.; The Baggott & Ryall Directory of Attor- neys New York City; The Lawyers Guaranteed Directory, Detroit, Michigan; The Lawyers and Bankers Quarterly, published by the Legal Directory Publish- ing Company of St. Louis, Mo.; the American Lawyers Annual, Cleveland, Ohio. WAT Ronrnes tarce cures §” WASHINGTON, D. C. ee el A PAT 1000 NEEDED a= ? fh Send us sketch or model for advice and exact e cost of patent. Our book “Hew to Obtain a Patent’’ sent free. It tells how to apply for Patents, Trade . " e Marks, Foreign Patents, Copyrights, etc.; gives infor- Here is the most remarkable book ever offered to mation on Patent Procedure ; tells what every inventor saventors. , One T housand needed inventions heted daou. ano ht of Eaventere, Whe ore oye and described. Arranged as follows: renera roblems; Auto- » ; motive; Mechanical; Electrical; Chemical; Radio; Marine. Gees S Cuammaat, - nh agg Separate chapter on the Ten Most Needed Inventions. This - chert. book may give you one idea that will win you a fortune. Noth- ing else like it has ever been published. Compiled at enormous expense. Edited by Raymond Francis Yates, formerly Manag- e © ing Editor of a leading scientific magazine. Over 100 pages, | inance a ents durably bound. Price $1.00. Cut out this advertisement, pin : $1.00 to it and send it to us with your name ane address, Patents of commercial value financed on royalt plainly written, and your copy of this remarkable book will basis without expense to inventor. Mail models be sent immediately. (Outside U.S. $1.25 Monev _—- after and copies of patents or full details to 10 days’ examination if desired. Limite l editio yn. Write NOW. KAMSTONE HOLDING C ORP. BUREAU OF INVENTIVE SCIENCE 41 East 42nd Street : . PATENTS Trade Marks, Copyrights, Patent Litigation Handbook with p A H E;. N } S illustrations, 100 mechanical movements. Sent free on request. R ALBERT E. DIETERICH Don’t Lose Your i hts formerly member examining corps U. S. Patent Office 621-A, Ouray Bidg. 27 Years’. Experience Washington, D.C. Before disclosing your invention to anyone send for blank form “EVIDENCE OF CONCEPTION”’ to be signed and witnessed. As registered patent attorneys f the oldest pat- we represent hundreds of inventors all over the United vi fn Reneriss we States and Canada in the advancement of inventions. D Pi ~ An ge Che form “Evidence of Conception,”’ sample, instruc- gervice noted for results, evi by many well known tions relating to obtainin? of patents and schedule of Patcrtgog cate of extraordinary value. “~~ Patent-Sense, free. fees sent upon request. Lacey, 46 F St.,Wash., D.C. Estab. 1 69. LANCASTER & ALLWINE BLUE BOOK ON PATENTS 480 Ouray Bidg. WASHINGTON, D. Cc. AND PRIORITY RECORD BLANK GRATIS Ortgtnators of forms **Evtdence of Conce ptton.”* MONROE E. MILLER, PATENT LAW YER 411-2 Ouray Building, SHINGTON, D.C. ELECTRICAL AND MECHANIC AL EXPERT INVENTORS voc bess 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 YOUL grteeescsececceseccceseceesceesessccenceseseeseeesemmmmnamamansst! invention for INSTRUCTIONS. No charge for the above information. | Nsve—————-—- RANDOLPH & CO. : s«=-- | 301 Victor Bldg., WASHINGTON, D.C. City

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POPULAR MECHANICS ADVERTISING SECTION i i. me 2S ice n°) We To the Man with an Idea I offer a comprehensive, experienced, effi- ent service for his prompt, legal protec- mn and the development of his proposition. d sketch, or model and description, for ice as to cost, search through prior ted States patents, etc. Preliminary ice gladly furnished without charge. experience and familiarity with various ts frequently enable me to accurately ilvise clients as to probable patentabil- before they go to any expense. Booklet of valuable information and form for properly disclosing your idea free on request. Write today. Richard B. Owen, Patent Lawyer 9-303 Owen Bldg., Washington, D.C. 41-E Park Row, New York City TRADE -MARKS REGISTERED MANUFACTURERS die ‘net tenstion "‘preperte = n it or design a machine to increase your production INV ENTORS We develop inventions, perfect and build beautiful Models We il reputation, a ur wn machine fo rther inforn R. G. CLYNE ENGINEERING CO. 3505 Page Blvd., St. Louis, Mo. G EAR ALL KINDS SMALL The most accurate made and prices reasonable. We carry a complete line of gears in stock for immediate ship- ment. Can aleo quote on spec ial gears of all kinds, Send us your inquiries, WRITE FOR CATALOGUE 10 CHICAGO STOCK GEAR WORKS 105-109 S. Jefferson St., CHICAGO ideas Have taff of high-class Mechanical Engineers shop and guarantee entire satisfaction ation. LATEST SCIENTIFIC MOTOR Runs 10 Hours on 1 Galion Wonderful Gasoline Engine Operates Washing Machine, Cream Sepa- rators, Lathes, Ete. Also handle Castings for other Engines. Books and Supplies of every kind for HANDY-MAN, MECHANICS and MODEL MAKERS Complete Catalogue 25¢ which is allowed on first $2 order AMALGAMATED SALES & SERVICE CORPORATION 327 R So. LaSalle St. Chicago, Il! SAVE 30 TO 80% ON AUTO PARTS us for prices on your requirements Everything for the t prices only Warshawsky can offer! 1915-35 S. State St. WARSHAWSKY co. Dept. PM12, Chicago World's Largest Replacement Parts House GOVERNORS FOR GAS OR AUTO ENGINES CANDEE-SMITH GOVERNOR CO., SPRINGVILLE, N.Y SEE MILES AWAY WITH Big 3: It. Telescope Has unusually powerful lenses— magnifying 8 times. Brings people and objects miles away close to your eyes. Brings new pleasures to home, farm, camp, travel, sport. See moon and stars as never before New Ferry Wonder telescope has 5 sections —opensout over 3 ft. long, measures 12 inches closed Brass bound with knurled edges. Sections made of special, smooth finish fibre, t and ou Bras safety c A bet oh on dust Foster ft. long open 12 in. long closed FIVE SECTIONS 8-power Lenses Delighted Users! ‘I am delighted with the ‘Wonder’ telescope. Today I have been watch ing submarines 3 miles off the coast."’ Philip Brush, ‘I can see across the Mississippi 3 miles and see people fish- ing.""—M. L. Thorn Iam nearly 80 years old and if I could not get another would not take$10.00forit A R. Walker I can tell time on the church clock 5 miles away ."’— Edward ‘Couid tell colorot reroplane 4 miles away Mrs. L. M. Yarbrough. Free! YES, ABSOLUTELY FREE! Handsome Carrying Case, light, strong, Case is ameter damage. complete with strap 12in. long, 2 in.in di- Protects from dust and Handy for farmers, auto tourists and hikers Ferry & Co., Chicago, ! Wonder Teles i. 1] ft plus post Send coupor FERRY & Co., Send cou- pon and We vba com with free arr ome by return mai ial bargain price (Or send stage.) Iwo vs Satis- e pay | Pow 'f p uaranteed or money back t Chicago, Ill. Dept. 1771, Ill I will pay I arri not satisfied

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162 POPULAR MECHANICS ns the difference wer whicl and excellent reception— in that distant ided px mea between medic cre between not quite bringing station and getting it strong, undistorted. iaven Tubes bring added “ Kick" to vour set insure quiet, clea ir, tor t reception. storage battery set The New Daven 201-A Amplifier and Detector ir set—the differ ire place the others. “V7 ICK,” clear and and in addition Three types for any 1e peries Try just one of these tubes in find in added power will make y« ; Ampere. The Mu-20—The Finest Detector Tube Made int of its unique char Daven Mu»20 is, we honestly believe, detector tube ever designed. Quiet in operation, non-microphonic, amplification factor of 20 and exceptionally long life \lso the standard tube for resist- impedance audio amplifiers. 6 Volts—!4 Ampere. The Mu-6—The Power Tube for All Storage Battery Sets The special filament insures long life it possible t use ence you will 5 Volt icteristics the the finest in acco ance am ts characteristics make al without overloading or dis- a stronger sigt tortion. 6 Volt -1g Ampere The New Daven AC Tubes requirement-—the largest line on AC arket 4 Prong, platinum coated filaments, » types to meet every Tubes on the 1 no hum, noa-microphonic. iplifier, High Mu, Detector, Power and Rectifier FREE CATALOG Giving complete information about these and other Daven Products, at your dealer or direct from us. “Phe Sine of Movil” \DAVEN RADIO ‘CORPORANIOY mace max Kesistor Specialists” a STCRED 154 SUMMIT ST., NEWARK, N. J. ADVERTISING SECTION BEGIN FEBRUARY. You save middieman’s — because we have nm diamond importers WB since 1879 — 48 years. We sell only blue-white dia- monds—no off color grades. Everything aranteed as represented .Our money-back- if-not-satisfied guarantee protects your order. An old concern means safety. XMAS SPECIALS Jewelry makes the best mas gift because it lasts articles pictured here on convenient terms Send Your Order 10 days Free Triai Just send $1 deposit or the full first payment. Pay post man on delivery the addit al amount, if an $8 Down Dainty, 18 Kt. wrist watch set with 12 biue- white diamonds, 4 sapphires in platinum. Guaranteed 15 jewel movement. $1. 75 Weekly white gold ly or monthly payment begin ning ceruers. You have | days to decide. If not satis Down fied, return and we will re fund every cent you paid t your self and a few business ref erences. Everything stric'|y confidential. No one will know what or from whom you are buying. If under age. have parents or guardian guara tee account of place order for you Write For iieiaenh Catalogue Hundreds of ins in Diamonds, Watches, Wrist Watches Jewelry, Toilet . Tableware, etc. Beautifully illustrated // ry _— right into your . Buy Dia Ww grades, —— sae values be fore buying. Contains information qier pve oes dare not tell, such as weights an: diam STERLING 2'3952 CO. 1540 BROADWAY, Dept. 2377, N.Y. . diamonds set in platinum, 2 sap‘ phires, attractive 400° SAMPLES sesame (0 fat Without experience E. Lube earned $18.08 in one aftern with our beautiful dress goods, silks and wash fabrics capital needed. We show you how to succeed. Write for samples and complete selling instructions. The National Importing Company 569-573 Broadway New York Cit) — " Dept. 7-6 Amazing New Invention Brings Men 100-3150 a Week Be a check-protection expert Make big money quick. So new, practical and handy t Little Check Writer with the Big Protection sells ea on first sight Quick and fascinating demonstrat Costs no more than good fountain pen yet fully equal! t best $100 check writers. More Factory Representatives Wanted. Permane dignified positions; immediate earnings and brilliant future ase Sweers made $500 last 10 daye—Bache made $3,000 in a month Ww today for details and start at once making splendid regular income ARNOLD CHECK WRITER CO., Dept. W-14, FLINT, MICH stop check fraud po" ene sh«

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win —_—_ we POPULAR MECHANICS ADVERTISING SECTION 16 ———— THE NEW BAND SAW HERE IT IS: Five thousand craftsmen insisted that Waco produce the Red Jacket Band Saw. Now here it is: capable of doing all Band Saw work, powerful, efficient, dependable, and small enough to fit into the Waco Home-Work- shop family of excellent tools. Solid disc wheels giving 12-inch capacity on four-inch lumber. Saw table 9”x 12” that tilts full 45 degrees for all miter require- ments. Direct gear drive from the famous Red Jacket Motor. Unconditionally guaran- teed. SENT ON 10-DAY TRIAL ONLY $3522 SEND THE COUPON WACO TOOL WORKS, INC. Waco Tool Works, Inc. 542 North Parkside Avenue Chicago, Illinois I am enclosing $31.50. for cas I am enclosing $10.00 as down payment and if I keep this band saw, I will remit $10.00 monthly This band saw is sent on 10 days trial and may be re- ned for full refund This is the full price less 10° City and State AUTO DESK Fits steering post of any car. Holds 4x6 paper pad and pencil. Serves as holder for road maps or memo- randa Invaluable for doctors, salesmen, delivery men, taxi cabs, tourists. Well made, beautifully finished. An ideal Christmas pres- ent. Sent prepaid for $2.50. State make of car when ordering LIVE AGENTS WANTED Brainard Bros. Sacramento, Calif. Build YOUR OWN BUZZ SAW with THIS |.” SAW ARBOR $3.00 BRONZE BEARING—BALL BEARING $5.00 Send in your order today 2 { va J — ——__—______ L____ 0. (*) E. A. POPHAL MFG. CO. WAUSAU, WISCONSIN Builders of Bench Saws, Band Saws, Lathes, Jointers, Etc. ASK FOR CATALOG &3 $150 to $300 More Each Month Easily earned from HB 8-Hour Battery Service—with practically NO INVESTMENT on your part Charging batteries in 14 the brings you the business. Costs less to operate, making you more net profit on each battery tequires no special experience and PAYS FOR ITSELF on easy monthly payments WITH A PROFIT BESIDES Now is the time to start to get the Big Fall and Winter Business Costs Only $16 Monthly Comes on 30 Days’ Trial For full infor check No time required by other shops ation without obligat 1 in the coupon below Complete Automotive Electrical Service is also a Big Moneymaker with an HB Universal lest gench ir your shop ONLY 820 MONTHLY brings you ad- vantages previously to be had only with equipment cesting $100 to $150 more For full information check No > in oupon below Get five men's profits f one mans ' rr work with an HB Portable Paint Spray rhe wonderful new paint method you read so much about Paint automobiles houses, barns, garages, furniture, et Inexperienced men doing better ork than old-time brush painters Check No. 3 in coupon for full information Better air service than the other fellows will bring more customers to any Automotive . Shop. HB Upright Beltiless Twin Automatic Air rvice now available for . as low as $11 monthly Check No. 4 in coupon for full information Da Any HB Equipment may be had on 30 ys’ Trial and on easy monthly terms that let it pay for itself with a hand- some profit besides Investigate now Mail the coupon below HOBART BROTHERS Successtul manulacturers ~since 1893 ~ BOX M127 TROY, OHIO Tear off Coupon and Mail Today HOBART BROTHERS CO. Box M127, Troy, Ohio. Send me complete information on the items I've checked with your 30 day trial offer, easy payment tert and informa tion on how HB equipment will increase my earnings 1 One Day Battery Service Profits 2 Electrical T t Bench Opportunitie Portable Paint Spray Business i Better Automatic Air Compre NAMI ADDRESS

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164 POPULAR MECHANICS ADVERTISING SECTION _aony SELLHEAT eobepeyen pach Man, you don't have to sell heat. Everybody wants it. Eve agents cleaning up $3000 to $5000—no soliciting—no investm TE t no risk—just visiting prospects secured by our national advert and leaving the heater for a night's trial. When It’s 23 Below Zero "« Ever “pe EVERBRITE rite Ra- diant Oil Heater will keep you antiname le. Mrs. : : Senften, Genoa, Nebraska, writes: ‘23 below zero, but Radiant il Caler the Everbcite kept us warm and burned 25 hours on 1 Ww filling.”’ A portable heater for homes, stores, churches. $250 a eek Makes and burns its own gas from common kerosene < . “ - J.O t ‘aliforni: Pours out flood of pure, clean, intense heat at cost of 1 cent an hour. J. O. ~ and, California over $250 a week last Just send name for amazing agents’ offer. Clean Knabb and Godwin of Flo: up $200 a week or more! Get a demonstration both did better than $20) heater fos your own use. Or if not interested in week. H.T. Rees of Kar

agency, write for special offer on heater. No wick—burns like city gas. averaged $300 a week. F. \\ Cleaner, cheaper, more comfortable than wood or coal. Low price. Hubbel, lowa, beat $400 a1 WRITE TODAY So did Senften and Cassel Richie of Iowa, Shook « 6216 Gateway Sta. Mexico, Webb of Arkansas, V “Che EVERBRITE STOVE Co. KANSAS CITY, MO. “fli sisleae, ood Makar ©

All radio programs, especially from distant stations, come in ry clearer with a firm roof aerial. Your aerial must be right Poorly erected or makeshift clothes-line-on-the-roof aerials are the cause of most faulty reception, no matter how good a set you have or the condition of the tubes and batteries. & BEST ROOF AERIAL ONLY $1.50 The W-E-B-B new Ba apt Socket Adjustable Aerial keepe rigid and constar serial wire Thie permanent mely sod. looking aerial improves the appearance

open : rceipte &i cee eee "Mode us Agente wanted Mod Al my TIMING GEARS Fits 7 —=18 Pe,.03t ANY ROOF— Model A

ESE EEE ESS SS SS SSS con (een [ A NEW RADIO LOUDSPEAKER This Dual Tone Speaker Reproduces the High and Low Notes Perfectly BUILD IT YOURSELF FOR $12.50 The COMPACTCONE isa thirty inch cone speaker, so arranged that it fits into a cabinet fourtes inches in diameter and seven inches deep. It has two distinct sound chambers, one being design: to reproduce the high notes and the other to carry the low notes of the tube and the base viol. It —_ damp proof and cannot be affected by weather condition = ee The usual thirty inch cene, while possessing wondert ~ | tone value, occupies so much space that it is consider ] I ] | ] | I ] I impractical. In the COMPACTC ONE the diaphragm is full tl ] l | I ] I I I I l I ——

inches but it is so arranged as to occupy a space but fourteen in che diameter | The COMPACTCONE may be had in the completed form ar | knock down kits. In the knock down form we supply all the necessa: | parts, cut to fit and ready to assemble, with ful! directions for asset bling. You can put one together in a very short time Write for our free beautifully illustrated catalog Miniature Ship Models, Inc. a (ms (se (ms ( (sm (. ( ( cae (ss (mn (me (

Dept. PM os 3818-20-22-24 BARING STREET PHILADELPHIA, PENNA. CANADIAN BRANCH [i L . — 1485 Bleury Street Montreal, Canada Ke — a Se a Sa Sa Sa Sa Sa ed Sd Sd Sd Sad aed Ja Sad Sd Sod Sad Sad Sad Sa Sd Sd Sed SS Sa Sd dt em

v a ellen AES! ay

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POPULAR MECHANICS ADVERTISING SECTION 165 |} Amazing, New Glass Cleanex

. 6 ~ ERE’S an absolutely new, money-making proposition that will bring you big profits—easy profits—QUICK PROFITS! You can make $50 a week in spare time—$100 in full time—taking orders for JIFFY GLASS CLEANER anew, pure, harmless liquid that easily and instantly cleans glass surfaces with- out water, soap or chamois. Think of it! Unequaled for cleaning windows, mirrors, W indshields, show cases, eyeglasses, ete. Anyone, Anywhere, Can Earn Big Money All you do is demonstrate to housewives, automobile owners, stores, garages, etc and take orders. We do not sell dealers. All business from vour los ality must

; come through you, and you alone get the profit on every order Every demonstration brings you \ two to four orders Just moisten a cloth with Jiffy Glass Cleaner, rub over the surface of the glass and then polish with a dry cloth Instantly removes al dust, dirt, grease and grime without streaking After one application windows shine, gleam and sparkle like crystal—and stay clean twice as long. 4 Albers Made $47 in a Day! \lbers, Ohio, made $47 in one day and he havea a —- o ance to reap big profits quickly. ke $10 to $20 ‘ rht fro the start says that $100 a week is easy for him. Men and ™ a vee ‘ ™ women everywhere are making amazing profits with Mail Coupon NOW jiffy Glass Cleaner and my 350 other fast-selling

‘ , . e109" : ntroduce Jiffy Glass Cle I ur lo hile it’s ne products. Chris. Vaughn, Se Os den meee amen week: L. C. Van Allen, Il., averages more than $100 = made before. Send coupon for full details—without cost or a week; Mrs. K. R. Roof, 8. C., earned $50 in her _ ae © om ict quick for big profits, Send coupon - . . ‘> first week’s spare time; Mrs. B. L. Hodges, N. Y., ear S18 to $20 a day ; H. . Hanson, N. . m ikes | Ipbeeearegginncz nar ainygse sng gaara gi it =cut alata lalate eo wel Se ane ¢ ’ Y a ake tl ™ : THE JIFFY GLASS CLEANER CO., J we oS Wee = spare time. ou can Make US Dig § 3518 Monmouth Ave., Cincinnati, Ohio. I r too! © Please send me fu letail f your money-ma g pr Send No Money 3 without cos : i? . . . I vant you to send me a cent. All [ want you to do is S Nas ¥ you how you can make $50 to $100 a week, wit! H ience and without taking any course of training 4 a furnish everything you need, to < you wha e Ad i in this easy, fascinating work. You ¢ ly +4 risk whatever You can't lose a penny and yet you ° . Print or Write Plainly

_ Makes | EVER Y-USE ELECTRIC MOTOR ATTACHMENT | Fastens directly on motor shaft.no | pulleys or belts necessary H grindstones, buffs, saws hy e scr at ~ | proses, drills, ete. Ser as | Made to fit 3-8, 1-2 and 5-8 inch shaf te. State size. | | + BAO iO | Q mont . | |

‘ae Electric Motor Co., 178 C-1 Centre St., N For Folks {3 who refuse to be

O wonder Charles Hickey earned over $6,000 in six months! He takes orders for an amazing new invention a ira e that prevents glaring headlights from blinding you a device that would have prevented the thousands of glaring Reflectalite arenes : headlight accidents that occur every year. It is radically overhead traffic sig

right onto your —— new. Shields your eyes without blocking view. Unique ment board No stretching demonstration makes money fast. Tustalled nor craning. Full, clear 160- f § degree vision, day or night. | A — ° Oo —write or ree DAY- wire Always in perfect focus. Out- | gents ar wners sample offer and lasts car. For all makes | territory. Right now is when car owners need glare pro » - tection most Don't send money. Simply write name and Ideal Xmas Gift address in space below, and mail to Face-A-Lite Mfg. Co.,

Beautiful chrom ium plated Dept. W-79, Mitchell, S. D

e 1ot rust AG ENTS: Thousands will be Metal—will t " as gifts. Send $1.50 AT Special Xm to: ONCE Moe ante eredinnd Dy gift card. Mailed ANY) w HE RE | Name.... first order) and full proposition, in U.S., postpaid foro $1.50 LCT QUICK Order NOW Address........ G. D. CHICHESTER CO. 8212 Carnegie Ave. Cleveland, O.

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166 Wonderful Sanitary Automatic Electric Machine Just Out. If you are already in the food busi- ness—OR, if you bitious to start a of your own that profits on a small investment once about this new autom ing ‘‘Red Hots” that makes them twice as appetizin A YEAR as before. $5000 to $1500 Fortunes in ‘‘Red Hots” Even bigger profits Machine. Once a man ta is done forever with the old, soggy, boiled the dried-up fried kind where Roasted Red Hots are browned, chock full of the Wee-Nee Machine can cool Mail Coupon Quick! Be the first to have the Wee-Nee Machine and Monop- olize the Red Hot Business i: do it with this machine ing lines imaginable Mail it today! FOOD DISPLAY MACHINE CORP. 350 W. Huron St., Dept. 13-59, Chicago, IIl. Crowds flock to the place appetizing juiciness, whether you are now in business or wish to start into one of the sweetest profit produc- Coupon brings the full details that will open your eyes to what is in store for you. FOOD DISPLAY MACHINE CORP., 350 W. Huron St., Dept. 13-59, Chicago, Il. Send me without obligation Wee-Nee Machine and to be made. Name Address POPULAR MECHANICS ADVERTISING SECTION BIG MONEY ROASTED “Red Hots’ AMPERITE is the only setf-variable filament contro! Automatically does the work of hand rheostats and cate meters Proved foré years. Specified in every cireyit Entirely different from fixed filament resistors. A t nothing but AMPER FREE--*‘ Amper ite } of the season’s best cir and latest constru wala Ga7 ess 1-ept. RADIALL COMPANY 60 Franklin St., New York RITE RESG. Y.S. PAT. OFF The “SELF-ADJUSTING” Rheastat _ es Do You Know the Secret { ae of Quality Reproduction? **The Secret of Quality’’ tells you simply ar i how to get the most out of your amplifier — > ‘ quality. This 96 page booklet is yours for the asking—it Write for your copy SILVER-MARSHALL, INC., 840 W. Jack Bivd., Chicago, U.S.A, se et Be the Life of the Party Play a Tune in 10 Minutes Popularity— new friends—money-making opportunities come to those who can play! Now you can pick up your favorite scringed instrument a @ tune almost instantly NO knowledge of music needed pensive lessons. NO weeks of tiresome practice. Play tun: the start Play by numbers. Surprise and astonish your f Amazing new invention makes it easy to play Ukulele, Bar lele. Tenor Banjo, Guitar, Mandolin. Just press the keys a Trizie Friganza, fa e Vaudeville Star, wrote “I played in never touched a stringed instrument before d ‘ruser: * was skeptical abx one playing tunes inetant! changed my ideas € W. B. Matthies: “Y tisement didn’t t« or it.” N ASTONISH Your Friends You have always wanted to play. Do not delay— it is so easy so wonderfully easy that weguar- antee success or it costs you nothing. SEND FOR FREE BOOK! life—ne More popularity friende— money-r t fc ‘ t ree wend tod ra If you want to play tur stringed instruments ye on No play, no pay E-Z Playing Instrumente are sold complete or the E-Z |} be attached to your own stringed instrument » iff ame ee oe @ Mail Coupon Today! a= as = = = FERRY & CO., Dept. 9771, Chicago, U. S. A Send free book telling how I can get more fun out of | make more friends, have greater opportunities for get | ahead by learning to play my favorite stringed instrume! 10 minutes No obligation, | Name Address City State

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Isely ~it's S.A, iy ng ty: POPULAR MECHANICS ADVERTISING SECTION 551° soak INONDER ONE DAY So writes W. H. Adams of Ohio. Letter from V. A. Marini of California reports $11275 sales in three months. Jacob Gordon of New Jersey “$4000 profits in 2 months.” Alexander of Penna. “$3000 profits in four months.” Ira Shook $365 sales in one day. Bram bought one outfit April 5 and 7 more by August 28. Iwata, bought one outfit and 10 more within a year. Mrs. Lane of Pennsylvania says‘ ‘sold 8000 packages in one day.” J. R. Bert says “only thing 1 ever bought that equaled advertisement.” John Culp says: “Everything going lovely. Crispette wrappers scattered all over town, It’s good old world after all.”” Kellog, \ $700 ahead end of sec~ WE START YOU IN B Furnish secret formulas, raw material and equip- ment. Littlecapital required; no experience Build A Business of Your Qwn No limit to the sale of Crispettes. Everybody likes them. It’s a delicious food confection. Write for facts about a business that will make you independ- ent. Start now, in your own town. Profits $1000 a Month Easily Possible Send postal for illustrated book of facts. It contains y husiaatio oe from Dp erg en their aw vusiness, tells how and when to start, 1 formation needed. Free. Write now! —_ LONG-EAKINS COMPANY 1228 High Street Springfield, Ohio Save Yi When ail else fails, end your suffering with the Heefner Arch Support No Metal Fully patented. Itre-adjusts the entire foot. Write for free book and statements from doctors and users. Heefner Arch tie 658 M. E. Taylor Bidg. _—_ Louisville, Ky. MILES ON GALLON Aut omobile engineers who worked for AUTO RUNS 40 OF GAS 8 in an effort to reduce gasoline con- mption have found the solution in a mar- us invention that fits all cars An ial test made by one of the engineers howed 40 miles on a gallon of gas Thou- nds of car owners have already installed new invention They not only report izing gas savings but are also surprised find quicker pick-up, instant starting, ther running motors and disappear- e of carbon I Oliver, 999-151 E rd St., Milwaukee, Wise., for a limited is offering a free device to those who help introduce it He also needs men everywhere t r $100 weekly in their own territory taking car f ess Write him at once for free sample offer ar aking offer Ady 167 NEVER Too OLD to Learn IS musicone of the big things in life you've missed? Don’t give up. It’s never too late to start witha BUESCHE True’ Tone Tone Saxophone This is the one instrument you know you can learn to play. If you can whistle atune you can’t fail with a Buescher. You can learn to play quic kly, with comparatively little effort. Join the Home Town Band With the aid of the 3 lessons given on request with each new Buescher, many learn scales first hour and play tunes first week. You can teach yourself, and in 90 days join the Band, or play with an orchestra, at good pay. Only Buescher Assures Success But only witha Buescher is this rapid progress assured. You don’t have to fuss and favor for certain notes. Just open the key and blow normally. Every tone full, clear and true. Six Days’ Trial. Easy Terms Take any Buescher Instrument home for 6 days’ trial. If you like it, pay a little each month. Send coupon for beau- tiful catalog and details of this liberal plan. There will never be a better time to start. Write today. BUESCHER BAND INSTRUMENT CO. Everything in Band and Orchestra Instruments 2183 Buescher Block Elkhart, Indiana BUESCHER BAND INSTRUMENT CO SA 2183 Buescher Block, Elkhart, Ind Gentlemen:--Without obligating me ina way please send me your free literature. Mention instrument interested tr Age Name instrument Nam Addres

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168 POPULAR MECHANICS ADVERTISING SECTION 30 DAYS FREE TRIAL! SEND NO MONEY FOR the CON-RAD SINGLE DIAL CONTROL 661 /3 to V2% GTUBES 1DIAL COMPLETELY ASSEMBLEO RETAIL PRICE Save ! 1 can now buy at wholesale the f is Con-Rad sets f ired inder |i ense grants from Radio Corp Westinghouse Electric Mfg. Co Genaral >and American Telephone and Telegraph Co. Con-Rad Super Six—with single control and illu- minated dial—is the ultimate in radio receivers 4 30 Day Free Trial will convince you of Con-Rad superiority. Latest 1928 Model—Walnut Cabinet—shielded chassis —can be oper ted by a child—and guaranteed to give A CON-RAD in Your Home Means Money for You nd women making big profits sellir 1g Con-Rad vers through home demonstrations or spare P Low factory wholesale prices enable you to cash the » sensation of the year Write today for ‘ plete information. Another CON-RAD Success! Six tube model—single dial control—completely as- embled in latest model table s cabinet Retail Price, $34.75 lremendous buving power enables us to sell this set at this low price Con-Rad Radio Sets are sold exclusively by Consumers Radio Co Our generous Free Trial offer makes it easy for you to hear 1 Con-Rad in your own home CONSUMERS RADIO CO. 4725 Lincoln Avenue Chicago, Illinois le ee ee ee Consumers Radio Co., 4725 Lincoln Ave., Chicago, Ill. Dear “irs: Without obligation on my part, send me full details of the Con-Rad 30 Day Free Trial Offer Also send me Home Agents Proposition. Mapestic Most Popular “‘B” Power Unit for radio sets in the world Plugs into Light Socket. N Hum or Blast. Only fraction cent cost per hour. Any good radio dealer will sell on approval. The Super “B” illustrated beloy only $29.50, complete with M jestic Super-Power B-Rectifier Tul Write for booklet on “Better tadio Rece ption.” Grigsby-Grunow-Hinds (Co. Armitage Ave., Chicago | 2er Them Fe _ on Sw Semesxrmw= RABBIT HUNTERS +> z:.: “SCREW-BUG” 4 mechanical ferret, for hunting Rabbits, Ground Hogs, ete It travels round the curves and bends ‘em out of their holes and dens.” satisfied users in the past three years. One trial will pw ree you of its merits The VW-BUG’" uu “SCREV d by the inve t« by U.S. NX and gets Thousands of e« “ rial, with ar chests te 7 ot Fetishes M back guarantee Price $4.00 ea wit jer in S. A. Prepax r ©. O. D. plus postag Wet e no Agente. Wi ite for Free circulars THE GRABOW CO.., Dept. A, Franklin Square, L.1., NEW YORK Model Ship Builders | “FLYING CLOUD” | Our etal ees, Cloud” ordix SS tio MODEL SHIP SUPPLY CO., Dept M, Mines, 4 The thrill of receiving Tokio, Japan and Sidney and Melbourne, Australia ona Magnaformer 9-8 was ex- ‘4 perienced by K. G. Ormiston and party on the night of September 11, 1927—6,.000 to 9,000 miles on the loud speaker with a world of volume. The thrill of great die added to the sonorous, true-to-life tone quality for which Magnatormer 9-8 is famous, cives you a tr enter- tainment combination t agnaformer 9-8, Creator of True mander in Chief of the Air.” is the finest and most powerful rece ' c The secret lies in the perfec t Magnatormer Intermediate Long Wave FR. F. Trans formers with which it is equipped F dit are giving th ‘ highest praise in editorial articles in Radi Radi Doings, ‘ Call Book, Radio W rid an 4 other magazine 1 newspapers Each nalterably = ed at evcles (4300 They are so # scientifically put cethe ically that nothin change their electric acteristics ite the greatest eet oe the worte. t from the fully illus official construction shee oth sides printed solid t once, richt now gerd you oe it in mind, for FREE illustrated Mae former story, wonderful testimonials and tll account of K. G. Ormiston’s expenence D. Scott's challenge and defeat Don’ t bui da ect "til you hear fr én a day or two. RADIART LABORATORIES COMPANY 19 S. Le Salle Street Dept. 79 Chicago, | ~

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EE

POPULAR MECHANICS ADVERTISING SECTION 169 Cut the Family ~> Barber :

OCRE ae. Home Electric Hair Clippers 4 Made by old, experienced manufacturers of barber clippers. Plugs into your \s / light socket and anyone can q use it successfully for trim- ming, bobbing, shortening bangs, clip- ey ping neck, in fact saves barbering bills qd for the whole family. Equally practical

ir — for removing superfluous hair under arms, \ > on forearms or legs. Cuts clean as a razor. Does not clog, pull, nor cut the skin. Ps Saves Its Cost om | The Home Electric Hair Clipper is a tried oes and proven appliance now used in yf thousands of homes. Does work equal ed hw, » tothe best barber clippers. Rigidly guar- | ~ti Py, anteed. Takes the place of razors and - dipilatories for women. TF , a A Valuable Christmas Gift Put a Home Electric Clipper on your ¥/ Christmas shopping list for mother, rs father, brother, sister or a friend—a use- A ful gift that will be highly appreciated. A a

Ten Days’ FREE TRIAL r The Home Electric must sell itself to you. If your hardware or electrical dealer can't supply Dealers and Sales you, send today for interesting booklet or order Representatives from this ad. Pay postman $8.75. Use it for 10 Wanted days, then if it doesn’t prove a wonder, a money saver, return it in good order and your moncy will be refunded. State whether your current is 110, 220 or 32 volt. ALLOVER MFG. CO. Dept. 30. Racine, Wis. ” Pay You 40 A DAY! To Show My Mysterious ee Cigarette Lighter to Men ack, eaey pro te with this amazing invention Lighte cigarettes and cigars in etrong-

racticaland ne. Sells

k of expensive lighters, But sells for onty SOc. Guar- anteed 1 years. Elmers eold 48 in one day. Johnson cleaned up $63 .00 in two days wind can blow it out! | sess j oexpenence necessary .W ork | ull or spare time. Smokers | How does and dealers buy on sight. Send 3.00 for dozen lighters or it work ? 50c for agent's sample and = rapid fire selling plans. Satis-

faction guaranteed. MASTERLITE MFG. CO.. sk M-23 110 E. 23rd Street NEW YORK CITY

ACME K-1A $25 ACME K-3 Single Free Edge Cone $14.50 The Speaker that Deserves Such Broadcasting VERYBODY KNOWS present-day broadcasting de serves a good speaker. But here’s the speaker that DESERVES such broadcasting! It took five years and 320 experi- mental models to produce the new Acme double free edge cone speaker! Full orchestra volume without distortion. Takes full output of all power tubes without blasting and without additional apparatus. Beautifully designed. Richly finished in walnut. Never until you actually hear and compare the Acme, can you fully appreciate the remarkable improvements that have been made in radio reproduction since your present loud speaker left its factory. Cys Look for the ACME head ACME ~for amplification mse cee me vem mm ACME APPARATUS CORPORATION [ Dept. PM-1, Cambridge, Mass. ] Gentlemen :—Please send me a copy of booklet | checked below. I enclose 10c for each copy. Amplification without Distortion—How to Improve | Any Radio Set I Power Supply for Radio Sets—The Story of Socket 4 I Operation i , I eiitehéeeehgeeed esa ahawws apenas sewer Stre { If your dealer does not carry Acme speakers, we will supply you direct. Send coupon for Acme booklets de- scribed below.

<r cebeade oes Oe Se tn —_—_— a ee er me ee

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170 POWERIZER SS A U I lfodel for Atwater Kent and other stand- rd sets. ‘ $60 tadiola **20"" model without tube $59 Now you can make any good set a new $500 type A. C. Electric Receiver AN Radio—equipped with a Powerizer- operates with the newest R.C.A. tubes which require no batteries —B eliminators or convertors. The world’s finest tone quality is yours. Powerized sets are real light socket sets perfected by pioneers in powerized am- plification ..- Have your set equipped with a Powerizer— you'll have a permanent source of power and a set that will be modern in 1938... Hear a Powerized Atwater Kent—a Power- ized Radiola 20 or any good set with a Powerizer .. . Compare it with any other A.C. Receiver selling at $500 to $800... The only difference will be in the saving you make. Write for literature explaining details of real A B C socket-power and tone quality. RADIO RECEPTOR CO., INC, 106 Seventh Ave., New York Licensed by Radio Corporation of America and Associated Companies POPULAR MECHANICS ADVERTISING SECTION Improve Your Radio. With this R. F. Choke Distinctive in Principle: Superior in Performance The New HAMMARLUND R. F. CHOKE In your radio are two kinds of currents— both necessary. But. they must be kept in proper channels if you would have stable reception and good tone quality. The new Hammarlund R. F. Choke puts a leas! radio -frequency currents and keeps them in their own “backyard.’’ Your receiver is not m« without one or more Ask any radio engineer Two sizes—85 and 250 millihenries Write for Folder HAMMARLUND MANUFACTURING CO. 430 W. 33rd St., New York, N. Y. Gor Betton Radio ammarlund PRECISION PRODUCTS UW nsonGIVEN HEAVY BUILT AGM Here is 16 x 36 inch Waper 10-in. heavy dise wheels with r amp ‘ ee, er bearings; l-inch rubber tires. S; cially made a of seasoned wood beavil ai orce with stee | braces Sen also send 12 packs pers which you Give Away FREE (to mao ple sell the salve), « an for obtaining this on. Don't i © are relia UCA MFG. CO. i] Dept. 3A78, CHICAGO EXCEPTIONAL XMAS OFFER $ 9 5H Retail Price $49.50—Limited Time ONLY Agents Make Big Profits Before XAS X-Ray Electric Vacuum Cleaner Shipped C. O. D. Anywhere on pee euit Diamond F YOU CAN TELL IT FROM A DIAMON( SEND /T BACK / 1 Carat Elite Diamonds. Matchless for tt deli & minute 3 With each ring or + we give free beautiful Combination Set. Set wi Diamonds. SEND NO MONEY. Just send name, address and inas r arrival pay L.A. $3.89 and postage. Satisfaction Guaranteed. W Cash with Canadian or foreign orders ELITE JEWELRY HOUSE, DAYS TRIAL Powerful Suction with Special EVERY General Electric Motor Fully Gonvenient Guaranteed PREE ———! The Morrow Co., Inc. acents | 326 W. Madison St. CHICAGO WANTED | ziing rainbow brilliancy. You'll ings surpass all others Stand acic tests Handsomely Engraved Ring, ster Guar anteed. Looks like A eeny ee, ete ud « wne Ss. COLLAR AND. CUFF. Links ewes * Dent. 376, 609 S. Pav na St CHICAGO. nor Les!

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10 ce e nice POPULAR MECHANICS ADVERTISING SECTION | Radio $500 | cityintheU.s-A. | | No Tubes || No Batteries | | No Static | No Upkeep | Guaranteed for one year. Brings to you, at a range of 10 miles, ALL PROGRAMS from local broad- | cast stations. | | Clarity of Tone Unsurpassed BUY ONE FOR A *“*SHUT-IN’’| | Special Light Weight Ear Phones $2.50 Additional “rrse"? Popular Radio Laboratory, Radio Broadcast | | and thousands of others. Described on Page 659 October Issue POPULAR MECHANICS FLASH RADIO CORPORATION 127 Federal Street Boston, U. S. A. AGENTS WANTED Nina St LINols Is YOUR LOUD SPEAKER PARALYZED? cer is one of the majority which acts “Dumb” with no f ise, aSk your Dealer for the Muter Clarifier, or write us f partic ulars abot ut this miraculous new Radio necessity which Full Tone, Clarity and Volume. Lestie F. Muter Co., 76th and Greenwood, Dept. 805-T, Chicago, Hlinois Radium Dial Jeweled Movement = ranteed watch cannot be manufactured in This fully gus America ese tha ?_ Genuine leather stra Accurate--d rab hand . SEND No’ MONEY. Pay on delivery $8. 99 plus poate e. “eea> U. S. Swiss Agents, 561 Broadway, New York City. Dept. w-10 MAKES RADIO STATIC UNHEARD amazing device has been invented by C. H. Geppert, W-207 Hewitt Bldg., Des Moines, Ia., which filters 50 to 90 per cent of static in radio receiving sets. Not only that, but when static is not bad, you can increase your volume tremendously, bring in more distant stations, save 30 to 40 per cel it on batteries, eliminate local sta- ions from running in, give your set at least one more stage of radio reception and greater selectivity. Works on all radios; can be attached instantly by anyone without change to set. Mr. Geppert wants agents and is willing to send a no cost sample. Write him today. A simple, 171 Everything © but Static Brings in Faraway Stations Loud and Clear Regardless of Static Conditions Fane everywhere are re ctivity and marvel- € aay true, clear sweet Install FREE TRIAL Makes this thrilling test at our risk! Ground Antenna Install an Aer-O-Liminator ‘ aeri: I'ry outona Leave your old overhead aerial up night when static is bad If you do not get a wonderful improvement in freedom from static and clear sweet tone without greater selectivity & if you can't get good recep- interfering noises tion on stations that are drowned out by stati on your old aerial, you need not pay us a red cent for this test. Send coupon at once for scientific Ground Anten- explanation of Aer-O-Liminator na) proof of performance and our conclusive iron- bound guarantee and remarkable Free Trial Offer—Mali!l Coupon TODAY! Curtan Mfg. Co., 154 E. Erie St., Dept. 805-T, Chicago, Ill. Acr-O-Liminator (Ground Antenna) * + . * . . : . ei] Se . « “dR; Wir) ong “~ . Hi \ RI rs ta I M Dies, : * , gi ‘ Ss : 4m, I R Warant.. P , - , : . CDt i, ers # Addrec. Me Prooe 2 : . * oy £ City : - 2 a State . : f ‘*"2ee, s **2000, a *"s255 * =. . ne eees., s "S000, * “2205, s "225, . ae * a

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NEW vrwin BiabE CLEANER WIPES YOUR WINDSHIELD STRAIGHT ACROSS ... $50 RYSTAL clear vision for driver and pas- senger! A powerful, noiseless motor, driven automatically by the well-known suc- tion principle, equipped with two vertical blades which slide smoothly back and forth, clearing your whole range of vision. The Visionall clears 254 square inches of glass—more than twice as much as the aver- age cleaner! Blades do not swing in a half circle, but wipe straight across, allowing the water to run freely down off the end of each blade. One model fits all cars. Easily installed. If your dealer can’t supply the Visionall, we will mail one postpaid for $8.50. Trico Products Corporation, Buffalo, N.Y. World’s largest makers of windshield equipment. TRICO VISITONALL TRICO PRODUCTS CORPORATION, BUFFALO, N.Y. , As advertised in Popular Mechanics, please send me one Trico Visionall with instructions for installing. order for $8.50, I hav I enclose draft or money written my dealer’s name in the space below. Name Address Dealer's Name ———_—_—————————————— rr A SERRE AES CANON IST ER TT AAS POPULAR MECHANICS ADVERTISING SECTION t Protects Life and Home warns away prowler and sneak-thief from home, garage, bara or chicken house. Patented, guaranteed signal bell rings 2 minutes when doors or windows ere tampered with. NOT ELECTRIC. No upkeep expense, Quickly installed, Mounts in small space. Hendsomely finished in oxidized copper or nickel. Door or window style $ 50 in either Balen. ee MAKE BIG PROFITS : a Post AGENTS pemonstTRATING Paid THE AKRON ALARM CO., Dept. 14, Kenmore, 0. Cal. 30-40 6 Shot $9.75 KRAG CARBINE—Why Pay More? All the qualities of a high price rifle. The ct of those who know. Fine used condition, all workin, parts guaranteed for one year. Send for our Free 50-page catalog of money saving values; Guns, Ammunition, Cutlery, Sport and Gov't goods Outfitters for 50 years to leading Militar and Society Organizations, Theatrical and Wild West Shows Satisfied customers all over the world. Terms Cash. No C.O.pD W. STOKES KIRK, 1627-P. M. 10th St., Philadelphia, Pa, BIG VALUE FOR 10 CTs. 6 songs, words and music; 25 Pictures Pretty Girls; 40 Ways to Make Money; 1 Joke Book: | Book on Love; 1 Magic Book; 1 Book Letter Wr ing: 1 Dream Book and Fortune Teller; | ¢ Book; 1 Base Ball Book, gives rules for games Toy Maker Book; Language of Flowers: 1 Mor Telegraph Alphabet: 12 Chemical Experiment Magic Age Table; Great North Pole Game Conundrums; 3 Puzzles; 12 Games; 30 Verses for Autograph Albums All the above by 10 cents, and 2 cents postage. ROYAL SALES CO., Desk 919, Norwalk, Conn. ENCYCLOPADIA BRITANNICA in the New Form—at a saving of 40% Write for full details Address Dept. PM ENCYCLOPEDIA BRITANNICA, 342 Madison Ave., New York City THE INC. The j Quick Way |»: (/— to Music = KING Band Instruments offer you the quickest, easiest way to learn music—to play brilliantly. They are unqualifiedly guaranteed in writing to be perfect in design, materials, mechanism and workman- ship. That’s why they’ll help you to learn faster and play better. When a great musician like Edwin Franko Goldman says that King In- struments greatly improved the tone and intonation of his famous band, that’s proof that a King will insure your musical success. Start now! Tell us the instrument you want. We'll ship it to you to try— FREE. The price will be no more than you'd pay for a less perfect __ instrument. Deferred payments » will make payment easy. ate —. yourself ? afford to own a Ki a | } | | You can ng—the instrument } Mail the coupon Today for our Handy Refer- | ence Catalog and other interesting || i] Xs KING BAND INSTRUMENTS = of guaranteed superiority. —— The H.N.WhiteCo => gy | 6211-94 Superior Ave., Cleveland, O. Please send me free copy of “‘The White Way” Magazine and your Handy Reference Catalog. Check, below, instrument preferred.) Age... State Trombone “Alto Baritone Bass Bugle Da athheee aus | )Saxophone [)Trumpet (1) French Horn [ — Ca

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75 lore? tales litar 10OWs O.D » Pa. 5 Tube De Luxe Deck 5 tube circuit simply and inex- with this new deck. All mounted or wiring. Improves appearance formance. Choose your own cir- | component parts. Price $12.50. LYNCH Complete Resistance Line Resistors have been specified by ading experts for se vay be best re- Increasingly popular because of te, permanent, noiseless perform- When buying resistors say “Lynch.”’ 7 a © The LYNCH Book nee the ‘Control Radio” explains value of resistance Interesting, simpli- and illustra- Information worth s—for a quarter. Send today. Arthur H. Lynch, Inc. 1775 Broadway at 57th Street General Motors Bidg., New York, N. Y. guage o GOLD “FREE TEST/ Will you rt ar our = that the famous GOLD WAVE RIAL act- ually does the soueaien bie we claim? Will you test this triple gold-plated aerial 10 days and prove positively that it will GIVE YOU STATIONS YOU HAVEN'T BEFORE RECEIVED? BRING IN FAR GREATER DISTANCE! IMPROVE TONE AND QUALITY MARVELOUSLY! This aerial of gold is filled with conductivity — it draws and is GUARANTEED to produce these remarkable results on any make radio set rands—gold triple plated—Aerial 100 feet long, installed in or outdoors like any Other aerial. Send No Money dealer can’t supply, send name and address. +, plus few pennies postage. Use If not amazed and delighted ney refunded atonce. Learn isk why thousands of radio and even broadcasting ise it with better results. All engineers recommend it all European countries. Skane Se > AN ~~ 4 st Pay postman No More “Leaking !"" The wonderf rUrF GLASS ALL-WI er thon every w here vege eet & temper atur Cut out that Poo mp ar — equea|' Stops leaking! Corrosion Don't LUXEM & DAVIS MFG. CO. ept. J-12, 6229 Broadway CHICAGO | Ptocf—element defyinge— Di t ib SonBERe 91 000 voltshigh frequency 1s JORRERS— resistance. Only 35 cente! ri utors DEAl BRS Buy now and enioy NTS write for liberal discounts and better receptior than is proposition Fastest radio ever before possible. market. Exclusive territories. POPULAR MECHANICS ADVERTISING SECTION 17% NOW ODELS at, yf S ker Ki 3 isot COneC Speaker Kits The same famous “ Ensco”’, the original and World's Finest Loud Speaker Kits, now dressed up with Art Models which will delight the heart of the most fastidious. Two and three foot models to suit every need and condition. Guaranteed the equal of any manufactured loud speaker, regardless of cost. Anyone can assemble in less than an hour, no mechan- ical or radio knowledge needed The Three Foot Pedestal Jeautifully finished in poly- " chror heavy metal base Con state kit including pedestal. A practical, beau- tiful floor model Model F-175-36 - 17.50 In Canada - - 22.50 The Two Foot Pedestal Equally as well made beautiful as the model, but smaller Ideal for use 1 top of set or on any other piece of furniture Finished in Polychrome Model F-135-24 - 13.50 In C 17.50 and as three foot * Standard and Wall Kits anada - - Wall Kits are supplied with hardwood frame for easy assembly, now available in either 2 or 3 foot sizes Standard Kits identical with the wall kits, but without hardwood wall frame (you can make your own wall frame if desired) for use in building console, wall or book type speakers. Fully described in illustrated book. Either 2 or 3 foot sizes Standard Kits 2 or 3 ft. - ie. - In Canada Wall Kits 2or 3ft. - 1180 n Canada - - 12.50 Demand the “ Ensco"’—go to your dealer, ask to hear the ‘Ensco.”’ you will have a sur- prise in store for you. If your dealer hasn't been supplied send the coupon—our money back guarantee protects you ENGINEERS’ SERVICE COMPANY 25 Church Street, New York 75 Cornhill, Boston 28 E. Jackson Bivd., Chicago 331 Bay St., Toronto, Ont. 144 Second Street, San Francisco ENGINEERS’ SERVICE CO Send me Send to nearest address 8S. Prices Canada Prices I am enclosing 2 foot Standard Kit 10.00 11.50 Chet 3 fc rot 10.00 11.50 Money Order > foot Wall Kit 11.00 12.50 Cash (registered) 3 foot 11.00 12.50 Send C.O. D 2 foot Pedestal Kit 13.50 17.50 Allshipping § foot 17.50 22.50 charges paid on Check whict Standard and Wall Kits only Name Address City State PM

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POPULAR MECHANICS ADVERTISING SECTION

CROSMAN 22 RIFLE “Power Without Powder” With what other rifle can you set up a target range in any room of the house or even fire it in the back yard within city limits? You can do ‘it with a Crosman because it is noiseless and its power is adjustable, yet it is powerful enough for use with small game. Amazing Accuracy with Utmost Economy l’or target and small game shoot- ing the Crosman is the unani- mous choice of knowing people because it is the most convenient and economical .22 calibre rifle they can use—THE CROSMAN RIFLE NEVER NEEDS TO BE CLEANED—and the am- munition ischeap—five shots for a penny. Amateurs ean soon become ex- perts. The Crosman can be used so frequently with so little effort and so economically that it is in constant use. Continued regular practice makes the marksman.

Get a Crosman for Christmas The whole family will ene ”y it Or tell them about it and let it olve their problem ph pres tie get ft See the Crosman at your nearest dealer If he has none in stock write us giving us your dealer's name, and we Send will see “a he gets one to for this Saeeaare 50 Fee Booklet Now! The New Crosman Pell A,

CROSMAN ARMS CO. 385 St. Paul Street ROCHESTER NEW YORK

Ethyl is best ee for cold weather, too Your car needs Ethyl Gasoline this winter. You need Ethyl’s extra power to negotiate roads that are muddy and snowy and slushy...to keep in high and get away faster in winter traffic...to reduce engine strain ...and, most of all, to “knock out that ‘knock’.” The ingredientin Ethyl Gasoline —tetraethyl lead—which made <thyl the best summer fuel makes it best for cold weather too. /t’s the superior high-compression fuel for all seasons. And if you have one of the new high compression engines, Ethyl will give you a still greater thrill. Ride with Ethyl the year round. This improved motor fuel is on sale at thousands of pumps throughout the United States and Canada which display the “ETHYL” emblem shown above. Fill your tank today. ETHYL GASOLINE CORPORATION 25 Broadway, New York City ETHYL GASOLINE

iz

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Le POPULAR MECHANICS ADVERTISING SECTION 175 mee Now YOU Can Put AY > CRD BO se PowerYOURAR Anyone aan Install in a Few Minutes on Any 2 or 4 Wheel Brake Car Pcie THE MARVEL OF THE AUTO AGE Wonders never cease—and here is the sensation of the year! JUST THINK—a simple idea that has been = cot 4 verlooked all these years and now is boiled down to a device that anyone can easily attach to their own — —* reas \\iy | car in a few minutes—and from that day on your car stops with a feeling of SAFETY—without undue 7 TK | strair—Stops your car almost on a straight line. Triples the Life of Brake Linings, as— The Super Brake Device Equalizes Pressure on Both Sides of Each Brake Drum The SUPER BRAKE DEVICE puts real 4 wheel brake power on cars with 2 brakes and puts 6 wheel brake power on cars with 4 wheel brakes. The minute your foot touches the brake pedal you feel that security of good brakes without the continuous worry of damage to other cars and property as well as your own car—Then there is always that danger (with weak LIMITED brakes) of hitting pedestrians mostly caused by brakes $e 98 failing to respond promptly. SPECIAL OFFER .. 2 ax, \ Stops Skidding — Acts Instantly lsuri PER BRAKE DEVICE. | You must experience this NEW SUPER BRAKE ae C, Straus Bidg., Chicago, Ill. ‘ DEVICE; that smooth yet forceful stop without Gentlemen Enclosed find remittance of $4.98, 4 skidding in all kinds of weather and wet streets | kindly rush to me one SUPER BRAKE DEVICE | . \ j Relieves the pressure on vane) pate and shaft— The Greatest Brake for my Car - gio Device Ever Invented— Model it is under- | ed 4 = Sa stopping = AGENTS stood that my money will be refunded if I am not price includes New FITS ALL CARS Brake Rods Made ; to Fit All Cars power on any level roa Snebwnnd — | if” pk $1500 a Month Jip FREE particulars only. } will stop “on a dime.” My County is 4 =) SUPER BRAKE DEVICE | ‘ ie 1929-C, Straus Bidg., Chicago, Ill. y City tance FREE: BluePrints| NOW YOU CAN SAW EASILY and ACCURATELY Shew You How Te Make 5 TOOLS IN 1: A Mitre, Saw Guide, T-Square, Protractor, and Precision Tool Things For The Home . : The Harmak Saw Guide Shows You How. [Everyone can now do their own carpentry work—picture framing, garden seats and ornaments, shelving, cabinets, etc. No tool kit complete without one. Make Money at Home Doing Things Don’t ruin good lumber. Use a Harmak Guide. Operates anywhere. If your hardware or department store does not handle, order direct or write us for folders. One-Half f $30 Worth of Tools for Only (Special) $950 cena HARMAK MFG. CO., 635-E Delmonte Way, St. Louis, Mo. Regular Price $4.00 Outfit Still Greater Bargains in Boice Machines 14° Band Saw You can completely equip your shop with the latest Boice-Crane machines at their surprisingly low 12°x14 iits 45 prices. Large capacity. Strong. Sturdy. Speedy. Economical aon ack stock Universal Handisaw ades * ) ee _ Bronze earings Table 15 x17 elevates for r hay — May - grooving Tilts 45 degrees a : F for bevelling Swings 9° saw cuts 2%’ stock. Guides ‘alws ays remain 8° Bench Lathe parallel to saw Does turning, drilling, sawing, sanding, regardless of grinding, and jig sawing in wood or soit elevation or - metal. Swing 8". 19° center to center. = table No »ther saw of equal cost has this indispensable : and meets anically correct abi feature Jointer attachment quickly fite on rig ther new low cost attachments will plane boards to thickness, mortise cena bore, tenon, drum sand, grind, disc sand, rout and make mouldings. J1G SAW BARGAIN AT $11.00 Ideal for home shop, yet practical and sturdy enough for mar urers se. Stroke 1‘. Saw to frame 8”. Capacity 1's" stock. Uses blades 1-8” to 3-8” wide. Net weight 18 Ibs All Roice ma rer fos light socket attachm Send 10 cents ~page booklet, “ Mak- ing J Easy to Build This of Wood hich nodetel es oP ee | 2 wll tom Machines W.B. @ J. E. Boice, Dept. P.M. 12- c, Telede, Ohio

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176 Still the Superior Audio Use it in the Economy Nine and all other circuits After three years, Daven Amplication is still the most faithful audio amplifier. No matter what your favorite circuit Daven Amplification will im- prove it. Only with Daven can you get absolutely straight line amplification over the entire audiable range. No motor boating on good “B” Eliminators. Daven Amplification is now engineered for either AC or DC Tubes, for use with “B” Eliminators or Batteries. With AC operation, the new Daven AC-15 Tubes are used in the first two stages and an AC-10 or Mu-6 in last stage. GLASTOR THE TRANSPARENT RESISTOR Glastor, made only by Daven by secret process makes the glass itself conduce tive. Glastor Cannot change in value, cannot become noisy while the glass remains intact. Make your last change Replace your resistances now, it will be the last change as long as the set isin use. Glastor is made in a full range of values. The DAVEN BALLAST Good for life The Daven Ballast, the Standard Filament Control will not burn out. Good for life of the set. Made in 6 sizes to control from 1 to 6 volt tubes. Sold with or without special mounting as shown. Free Catalog at your dealer or sent direct upon request. Amplifier The Qne of Meocit \DAVEW RADIO CORPORAT Lon” wocran “Resistoe Spectalists” waus mt ort 153 SUMMIT STREET NEWARK, N, J. POPULAR MECHANICS ADVERTISING SECTION How do ABE. Here is mo dor to wo fas 1704-10 North Salina better MADE ONLY BY TH PORTER-CABLE MAC HINE COMPANY you do | your work on WOOD? —the same as your “tyra did OR with a 4 Sander hand. It 1e before. use jobs rk quicker, than the slow, hioned hand method of ing Quick completing a belt surfacing machine of . 14 pounds that will sand re than five times faster ¢} is possible by work that no machine has eye; Simple as a ; I at less cost belt change; fle pads to sand cury surfaces sentative. ny i It pays for itself in the first few xible ed Write for a Free demonstration by our nearest repre- St. SYRACUSE, N. Y. FROST-RADIO DE LUXE a Ask your dea!er to show you the new Frost Metal Frame and Bakelite De Luxe Rheostats with and without filament switches; the new Frost Vari- able High Resistance Units with Bakelite shells and pointer knobs; the new Frost ; Rheostats—they are GOOD small rheostats—and the Frost Fixed Resistances The latter cost but a few cents, but they make a tremendous differ- ence in the operation of your set Be sure to specify Frost Parts by name when ordering HERBERT Main Offices and Factory, Elkhart, Ind. New York Boston Philadelphia Pittsburgh TWO NEW FROST BOOKS Write today our two new books, V for your co just D the press: at Set 8 I Buil a and “ Better ception."’ These books « tain a great deal of valu information or cuits, Parts in getting the in high quality receptk any set you plan to build books are free today Chicago St. Louis u popul iT and on the use of Fr tr write for t nen H. FROST, INC Los Angeles > St. Paul —

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)? ha ee by 'e- POPULAR MECHANICS ADVERTISING SECTION 177

Harve Monkey Wrench.” Actual service Mechanics Wild Over It Any mechanic readily appreciates the greater convenience and efficiency of the H&E Wrench and wherever shown they are anxious to own one. As one mechanic puts it, “I don't see how lever could do without the H&E Wrench.” That simple slide motion gets their eye and it locks with a better grip and releases instantly. 500 Agents Wanted at Once Rapid sales with a handsome profit &, make this a veryjattractive proposi- Q tion for Agents, and on account % of this unusual demand we want ° agents everywhere and the opportunity is open to you NOW but you must ACT PROMPTLY

No other wrench like it. The First and Only “One Hand’’ Monkey Wrench Thumb Screw Adjustment—That simple slide Pressure n locks securely with a hold that resists over 750 8000 Inch N a end pressure. Compare this with any other Pounds WY . h. Does away with the old thumb screw idea that —4n tests passed lways a handicap. In every sense a “One Hand Government \ - Specifications. .7) ty and endorsement of Railroads as- Slides Up and Down—Locks Automatically sures High Class : : : ; , Practical Value. H&E Wrench creates a sensation wherever shown. Its simplicity, ution, strong grip and practical value arouses interest every- In the Factory, Machine Shop, Garage, on the Farm, or in the GET 1 fact, wherever tools are used—they all go wild over it. yoursF REE

Praised by Big Concerns H&E WRENCH SALES CORP., This Is Your TheC. B. & Q. Railroad and many other large Cor- Dept. F, 228 No. La — . ie hicago od : Dept. P, 285 East 134th St., New York City. Opportunity porations have acknowledged its value and en- teckeiee ¢ sales dorsed it Automobile Owners want it for con- "Please mail me FREE particulars. This does not ight in your venience and our Agents tell us “It is the easiest obligate me in any way eae selling article they ever tackled.”

NAME H&E WRENCH SALES CORP. Dept. P. 228 No. LaSalle St., Chicago, Ill. Dept. P. 285 East 134th St., New York City ADDRESS

TOWN.. STATI

JEFFERSON MFG. CO., Fairfield, lowa LATHE || (GSPATAR a Ce nn eT O70 oh E eae ADDING MACHINE 24” metal bed, $ f ced cone pulley. ADDS, SUBTRACTS, MULTIPLIES, DIVIDES) per additional foot. Does work of $300 machine. Guaranteed 5 years NOT A TOY. Made of steel and indestructible. Million dollar

capacity. Fits in pocket. Will not make mistakes So simple child can operate it. Instructions fur

Cc pished. Everybody should carry one for figuring KNICKERBOCKER 4 The Wonder Set 2-DIAL KARAS EQUAMATIC §-Tube Receiver F R E E $ :50 These two famous receivers as well as scores of other I RIAL Total Cost ell , aeta . sme ‘ sir ms . | i well kn wn sets owe no small part of their marve lous . an SEND NO MONEY—Just name end address. We will shiz performance to the use of Karas parts Karas Con- Calculator immediately On delivery pay postman $2. bi deusers, Transformers, Filters, Coils and Dials are (Plus few conte Postage). (If outside U 5. send cash 10 the perfected products of a factory which has been additional in Leatherette Case not satisfied after 10 da , P -- i > € « c OUSANDS OF § building precision electrical apparatus for more than a Pe oe SS third of a century. Write today for complete catalog This is lowest priced practical calculator made. “‘Why pay

of all Karas Parts, and details of the Knickerbocker Guaranteed more for inferior }mitations?’’ O:der from this ad 4 and the 2-Dial Karas Equamatic. —— — = == Mail Coupon Today<-=— =—- — —- KARAS 4028-L No. BABY CALCULATOR SALES COMPANY El v\5 KARAS EQUAMA Rock- Dept. 41, P. O. Box 1118, CHICAGO, ILL., U. S. A. ec- 4:9 USE Tie well (1 Iam enclosing $2.50—send adding machine prepaid. tric St., [] Send Adding Machine C.0.1D. $2.50 plus postage. Co. N Chicago (10e additional in Leatherette Case Name.... ° ee ‘ ——— iis betdnunspatWaadibhceeihhueeetiaans eesneenalll CT ete cskeeeenecores os , eee KNICKERBOCKEE AGEN | Write for big commission and territory proposition.

PARTRIDGE WOOD TURNING LATHE Buy the finished parts completely assembled. Build bed at home. A real tool. 6’ swing. Shipping weight 21 Ibs. Make radio parts, floor f. o. b. lamps, toys and numerous other practical and valuable articles. Also made in sizes to swing 8’, 11", 13”, 16°, diameters. Chicago —

MAKE THINGS AT HOME—SAVE MONEY $4350

——— IDEAL GIFT FOR FATHER OR SON Send today for descriptive circular. is ies : GD - ©. o. PARTRIDGE, Dept. 3, 2039-49 W. Lake Street, CHICAGO, ILL.

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nd Ss 3 arket mall Suppose a reason you rarely think of makes ossible here radically low prices, even ‘or tinest quality diamonds. Thousands of representative people, bankers, lawyers, merchants, others—continually reap this real advantage. Everything sent for Free Examination.This3/ 4 century, oldest, larg- est diamond banking institution in the world, rated over $1,000,000.00,— converts intocash the diamonds on which mone was loaned and not repaid. Loan val- ues, afractionof market values, are the price basis. Diamonds toofrom big cash deals direct with ull Prices European cutters. Must sell now eay Much Less Buys the Same See this 3/4 less 1/16 ct., snappy solitaire for $69.50. Try to match at $115.00. Exam- ine free any bargain at our risk. Startling, - itimate offers here of diamonds at 07% market price. Send now for full de- tails. Diamonds of unusual! qualities (also watches) from unpaid loans, offered at radically low prices based on mere loan values. Then, too, we have hundreds of diamonds from big, eash, European deals with diamond cutters, who sacrificed these —y away under the market. Send now, r our latest offers of this inter- nationally known cash headquarters.

te d Loan Listings Ready As low as $60 a Carat Radically different from a catalog. List accurately describes every diamond in full detail with guaranteed exact weight, color, quality, etc. Explains Guaranteed Cash— like Insurance Policy Loan guarantee. Also Unlimited Exchange privilege at price paid us. Gives full details of free ex- amination offers. n't wait, the very diamond you want may be ta th is very list at a price that will amaze you. Costs nothingto see. Write sewill doc or A Mail Coupon. NOW WwW!

ly Opposite Postoffice ] 1963 De Roy Bidg., Pittsburgh, Pa. Without obligation to buy, send me free, in plain 1

nvelope, your Latest Bargain List of Diamonds, ‘Watches, and other Jewels.

Nemes ..———.. .... = — — = = = 44608 wow nw own = = = = i o cncitneeimniateeen gna eee Re ne by Permission; — Ba f Pittsburgh, N. Marine i National Bank; Union Trust Ce. = * Pittsburg, Pa, ts bank can look us up in the mercantile agencies Le a a a a a a oe oe oe oe ee oe oe a os oe

IMPROVE YOUR RADIO SET! In making your radio set better, or building a better radio set, you will Gemerany find Clarostat specified Radio authorities know that Claro- state prot de the necessary resistance range, hold the settings, introduce no noises, and are dependable There are three types of Clarostats Clarostat Variable Control, for receiving circuits only Standard Clarostat, for voltage control of radio B-power units; Power Claro- stat, for series filament, line-voltage, and transmission controls Don't substitute, intentionally or otherwise! The Clarostat, as the standard variable resistor, is widely copied in appearance, but hardly in performance. Look for the green box. See that the name is stamped on the Clarostat itself.

4sk your radio @ r Clarostats Ww 1tch the radio lumns for data y ) to better your 1dio Or é d US { ect for latest information

American Mechanical Laboratories, Inc. falists in Vartable Resistors 285 North 6th St. Brooklyn, N. Y.

POPULAR MECHANICS ADVERTISING SECTION

| ‘our r Neighbors Will Pay You | oweek for Your Spare ime You can easily sell them your spare hours for $3 each by ser radio doctor,”’ building them sets, selling them supplies than retail A membership in the Association shows you how to cash in on Radio now and trains Pag for the $3,000 to $10,000 ings s awaiting qualified men > Association starts you in business if you wish Investigate all it a as done for others, all it can d you. A MEMBERSHIP NEED NOT COST YOU A Cc} Earned $500 in Spare Hours Our members are. making big money with Radio Werner Fich- ler, N. Y., earns $50 a week—Lyle Follick, Mich., has earned $500 -F. J. Buckley, Mo.—makes as much as he receives from employer —all in spare time. Our members are starting radio s ectting better positions, increasing their salaries, earning Money spare t ACT NOW=$.,%:<or at less pen NI Send post card for Sota ls of Special Membership Plan that need nc st ir 8 you a cent, and x ar Opp rtunity in the Radio In Pacer y-” It will show you how you can « 2 in on Radio now—and later Radio Association of America 4513 Ravenswood Ave., Dept. PM-12, Chicago, Ill. SA IEA RINE TE RENEE SI aa

GREATEST RADIO BARGAIN $18°* in U.S. 5-Tube Chassis Coast to coast reception Certified circuit Dealers write for special proposition. AGENTS WANTED. Write today for folder MUSSELMAN, Inc. - J. 240 Machinery Hall. CHICAGO, ILL Here It Is Boys! Look It Over R. O. Gosden of Michigan made $321.05 in 9 days —sold 5 machines in 255 hours THE EUREKA ADVERTISER (The Merchant's Friend ADI

Automatically prints the merchants’ “ADS” on his wrapping paper ne or tw tore. Coste what it ats t AD” printed e ma r rack they SALESMANAGER, Dept. A, 1201 Cortland Street, Chicago, | Illinois ACB Batley, ) Charger ONLY ree On GUARANTEED Charges any type of storage A or B battery, using a few cents worth of ordinary house current, either alternating or di- rect. Cannot injure bat- tery. Complete directions enclosed. Anyone can op- erate. No expensive “‘extras’’ to buy. Why pay $10.00 to $15.00 for a charger when you can get this splendid GUAR- ANTEED Rk. B. Charg- er by mailing us two dol- lars (bills, money order, check or stamps) Plus ten cents in stamps or coin to pay mailing costs. Charger will be sent postpaid. If you are not satisfied, return within five days and we will refund your money. Order at once—TODAY. . B. SPECIALTY CO. Dept. 601-S East Third St., Cincinnati, 0.

f {

Page 341

POPULAR MECHANICS ADVERTISING SECTION

H Y TRAC TRAOCE MARK REGISTERED erica’s big, old, reliable Radio Corporation (8th successful year) guarantees in its big, powerful, latest 6, 7 and 8 tube Miraco sets finest, most enjoyable per- rmance obtainable in high grade radios.”” Unless 30 days ise in your home fully satisfies you Miraco is unbeatable at any ce for beautiful, clear cathedral , razor-edge selectivity, pow- ful distance recep- n, easy operation. -don’t buy it! Your verdict final! or make lots of on sets and pment — write for timony of nearby ers and Amazing Special Factory Offer. Miracos work equally fine on “AC” electric house cur- rent or with batteries. ike your choice. lany thousands of liraco users— who ight after thorough mparisong — enjoy rograms Coast to vast, Canada to Mex- . loud and clear — th the magnificent price. 30 ( ANOTHER BIG BARGAINI Famous powerful big Miraco Super 6, 1928 model—ultra se- lective! Thousands find it performs = of much higher ays’ Trial Free. Fully Guaranteed. cathedral tone quality of costliest sets Don't confuse Miraco’s with cheap, “squawky” radios. Miraco’s have finest parts, latest approved shielding, metal chassis, etc.—as used in many $200 sets. DEAL DIRECT WITH BIG FACTORY Your Miraco reaches you completely assembled, rigidly tested, fully guaran- teed Easy to connect and operate. 30 days trial free. 3 year guarantee if you buy. You take no risk, you insure satisfaction, you enjoy rock-bottom money-saving prices by dealing direct with one of oe i oldest, most successful builders of fine sets. 8th successful year. Miraco , -AGENTS ! Make big profits showin rs Write f Une lends. Get Our Spec i Wholesale Prices! i, MID-WEST RADIO CORPORATION, Cincinnati, o. RES AND AMAZING SPECIAL OFFER SEND NO MONEY—20 + DAYS’ TRIAL, Special Wholesale Price Offer to User-Agents, Bank References, testimony of nearby Miraco users —all the proof you want—sent with catalog. ” * right NOW 6 tube Super a 36’ of wrrnout OBLIGATION, send me free literature, AMAZING SPECIAL it out- : <A Re ra _—— —— x NAME 5 ADDRESS @ MIDWEST RADIO CORP’N Pioneer Builders of Sets # 407-G Miraco Bidg., Cincinnati, Ohio. Retail List Completely Assembled MIRACO ** Powerplus*’ seta—8 and 7 tube mod- ela—have magnificently beautiful, clear cathedral tone quality. Turn one dial METAL SHIELDED CHASSIS “Aart +p and “CO er direct from light socket, with- out batteries! Write for Mid- west prices and discounts, Un- its are highest grade—lastingly dependabie, quiet in ratio! fully guaranteed. Mail coupon THIS COUPON iS NOT AN ORDER

WHOLESALE PRICE OFFER, testimony of nearby users, etc.

Page 342

POPULAR MECHANICS ADVERTISING SECTION

LUMINOUS PAINT cept at an exorbita: Lowindos abd which, applied sible fe the dark. Cant i shunes. — your watch or clock will enable you to

Make Your Watches, Visible by Night 2s;°",':, at orien. we have SA lett o — ¥,- Quite simple to use. nyo 4 nw can do it. tell t

Clocks, Etc., iscovery in the scientific Hitherto, t.--/ unobtain- this ture Nene ghe cartons S any a it omits vane of white THE © RKER MORE . little applied to the fang had night. You can coat the push but- tons or switch plates of your electric lights, mateh boxes, and innumerable other articles; make see, be own Luminous — Luminous Rosaries, etc. Small bottle, price 25c. and $1 postpaid. JOHNSON SMITH & CO. Dept. 816 RACINE,

CIGARETTE MAKER Roll your own and save money. Better and uicker eaves more than hal

GOOD LUCK RING Very oiking,, <. qusins and JUST LIKE ORDINARY CiG- ARETTES. SUT SUCH REAL STARTLERS! The box contains ten genuine cig- t. useful, handy. | Uncommon ne ma Pocket size, we os. | skull and croseb one des yp — om Made _entirel of metal, | two brilliant, flashing cae Sion Pm ge Tne rette is about += ated. ‘ © 6Sc¢ | sparkle out of the eyes. Said to en~third ome! ed. the anywhere bring cood luck .Onty 25¢ ppd. gets & ve

NOVELTY palin |

igsing — 10¢ Garter Inapector 100 novel metal badges. nickel plated, that, you can wear, giving you fun

out of all ~~ to their as cost. by == 3 tor 25, or per tA

“MIDGET BIBLE

to RICE 1 #i.3s, 100 for $7.50. Also obi ther pendant, Me St sires rigs Soe ne for use with “Midest Bible, 15¢. Withabunch of these bills, it is easy for each person of limited means to appear rosperous

Wonderful X-R

flashi at oll of

: Dp per time and peeling off a genuine bill or two from the outside of the roll, the effect created will be found to be all that can be desired. Prices, postpaid: 40 Bills 20c, 120 for 50c, or $3.50 thousand and postpaid. MAGIC FLUTE — The Magic Flute, or Human- atone, is a unique and novel musical instrument that is played with nose and mouth combined There is just a e knack in playing when once ac- quired after a little prac- Pest . will enable you to Paid produce very eweet music that somewhat resembles a flute. There is no fingering, and once you have mastered it you can play all kinds of music with facility and ease. When played as an « mpaniment to # piano or any other musica ay the effeet ig as charming as it © surprising. ‘Serpent's E; Eggs 3 it goes off with a loud BANG! a ea mith provoker yet entirely harmless. Price 25¢ SURPRISE MATCHES

like ordinary matches. Put up a in boxes just like reg- 10c ular Safety Matches. As the victim tries by light one he gets quite Price 10c per box, 3 bowes ‘or 25¢, 12 for 75 cents. These clever locks cannot be opened un you know the ombination. No | necessary. For your locker bicycle, too chest, mail bor thousands of

nickel plated, Weighs trifle over one ounce, Small yet stro Seeret and fu instructions with each lock 25¢ or 3 for 65c postpaid.

way fue nstrument ducing optical illusions both surprising and a startli with it it you can ese 7 apparentl, your fingers, the lead in a watly thet the _ terior opening in a pipe stem, and many other similar illusions stery that no one has been able to to satiefactorily explain 3 for 25, 1 dozen 75c. Johnson Smith & Co. Every Boy arg Own Toy Maker A great book for boys. It lain, practical instruc- or making all manner of toys, machines and other ar- ticles, amusing « ul.

Tells how to make a Steam Engine, a Photographic Cam- era, 8 Windmill, Microscope, Electric al Mac hine, Galvanic Battery, Electric Telegraph, Elec ctrotyping Apparatus, Telephone, Kaleido- scope, Magic Lantern, Aeolian Harp; how to make Boats of all kinds, Kit-s, Balloons, Paper Toys, Masks, wane ~y 3 ote. Carts, Toy Houses, Bow Guns, Slings, Fishing Tackle. i sbhit and Be Traps, ete. 200 illustrations. PRICE 25¢ Postramp

Bor contains 12 eggs. — lit with a match, each quadualty hatches itself into | : curls and twiste about in a most lifetike manner. Price per box, 10c postpaid, 3 for 25c- JOHNSON SMITH & CO. Dept. 816 Ha in ‘oulotence. 5! pages of

bs z u.s., Ganedien a and Foreign Stamps also a: RACINE, WIS. ADe wd Edition ot our new 1928 CATALOG maiied on sonstpe, pod ate, Bigger ond Satter than ever. Onty book of latest tricks in magic, the ch novelties, Puases, games, ‘Sporting al ay = unusual and d plants, unprocurable seeds Rem ry by Stamps, Coin, loney" Order, Geack, etc. Unused ecepted

“THROW YOUR VOICE Into a trunk, under the bed or any- where, Lots of fun fooling the teach- policeman or

a little instrument, fits in the mouth out of sight, used with above po ws Bird Calls, etc. Any- can, use it. NeverFaiis. A16 page course on ventril- oquism, the Ventrillo, ALL FOR 10 CENTS

AND FIELD GLASS Tt is made in the shape of and looks like « regular Automatic Pistol. No one is likely to stop and ask you whether it is real or not. Thus it is likely to prove iteelf very handy in an emergen trigger it come up as ae in the illustration at the Teht, revealing nine most useful ra and Field Glass, Telescope, Mirror, Meany ye Glass and In the + 7) coonpenrton such as Fir sheet . blued Saish. prick $1.00 postpaid. + on, Reading Glass, Sun Dial, Sun Compass. the revolver there in a place for various Aid A-ticles, Buttons, Pina, ete. The Pis that can be carried comfortably in pocket,

= of a real pe ; actually fires REAL K CARTRIDGES of miniature sis Illustration i+

ch et Loads like a regular pistol. Pull the trigger and it goes off with a loud bang Pistol is break open type; illustration shows position for loading Made entirely of high grade steel, nickel plated, octagon barrel, handsome! engraved handles, complete in box with cleanin ~~ Ss Also furnished wit ri handles, $2. ARTRIDGES, 50c per box of 25. HNSON SMITH & CO., Devt Bie. RACINE, Wis MICROPHONE TRANSMITTER BUTTON

You can ensily make a highly sensitive detect phone by using this Tranemitter Button to © the soun ves. You can build your own out without buying expensive equipment. It is sim, and inexpensive fou can install an outfit in »y home and hear conversstions being heid all over house. You can connect up different rooms hotel. This outfit was w by secret serv operatives during the war. It ie being used on ¢ stage. It is ulira-sensitive and is the greatest ir vention in micro-phones. You can mount the button almost anywhere—eard board boxes, stove ipes, stiff calendars, on the wall behind a pict } emo ete. Button is eo light and small it can: be detected. Persons can be overheard with: suspecting it. You can listen in on conversations in another room. be used 4 BK nethian r= will, The ideal microphone for radio use; carries heavy current and is extremely sens tive. Amplifies radio signals. Countless cther similar uses will suggest themselves. Experimenters find the button, useful for hundreds of — ments along the lines of telephones, amplifiers, loud kers, etc. any fascinating stunts may be devised, such as holding the bate canine OO

throat or chest to reproduce apeec ch without sound waves JOHNSON SMITH & CO., DEPT. 816, RACINE, wis.

Simos Lights tba

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. Seeey ShGS<ESROGEERS I

POPULAR MECHANICS ADVERTISING SECTION THE EXPO WATCH CAMERA egteer eases Feseinble ‘4 can carry

10c Pkge poe | 25¢P.Pd. | many reacons. | r t like a of ae ur ited Ea ee reytea | Ze? r 7 rom Grea’ m—4 sticks fam for laying oe 3 3 tor eaty pod rmsd og a th = rabber chewing 100 P

San ik tor 780

POCKET CIGAR LIGHTERS You may pay more, but these two Lighters will do the work as well as the most expensive. The “SIMPLEX” (Iltustra: on the left) sells for but 20; lights merely by giving the wheel # turn with the —— a “AUTOMATIC” (on right) lights auto- atically; press the button, the lid flies open and lights wick at same time tter, safer and cheaper than matches. A light instantly available inter 206: oe tor ether Sc each. All postpaid Acsomatto '$ 1.08 at _ ECTION PLANT One of the most wonderful plants known. Possesses the strange power of turning in a few minutes from an appar- ently lifeless, dry herb to a BEAUTIFUL Liv ING FERNLIKE PLANT of a dark green lor. Simply place the plant in saucer of water, itwill open up and start to crow in 20 minutes. When taken out it will dry up and go tosleep until placedin water again. Fine house plant—summer or winter. ldcents each or 3 for 25c., 75¢ per doz., postpaid. Great Fire Eater | SQUIRT ROSE With the Fire Eater in his possession any person can become a perfect salamander, apparently breathing fire and ejecting thousands of brilliant sparks from his mouth, to the horror and consternation of all beholder. Harmless fun for all times, seasons} EAL STARTLER. Thie is the id places. If you wish to pro-| most popular of all equirt tricks. The du € a decided sensation in your| flower je you csat Seok so Ssesb one neighborhood don’t fail to procure] sweet that everyone is tempted to inbale one neve send t the Fire Eater with ment tg prow the bulb. *Geewhilbens 3 n't they jurr core le a very long box, the cover of which is highly| rubber tube ‘that enally reaches to the ornamented with illustrations in} pork in‘large enoush, to wake ag A vari us colors. Price of al! com- ~My —¥ PRICE 25¢ plete only 30 cents, postpaid.

2 vce week Le v Ey. FEE.

MAGICIAN’S BOX OF Tees A ysterious Tricks Entire Evening’s En @- ANYONE CAN DO THEM ofan! fm nypiltvins row friends. Get coveras -- a in your be ies the MAGIC Bal BALL A into & J ns 7 water and when the w ORY Fi vanished and is found a else) ; me — FACTS Y FROM Tae MOUTH TRICK (@ seem supply of gener =e bons comes ‘our mouth); the DISAPP’ ‘RING ING HA ERCHIEF (a fparohlel held snd mysteriously vanishes) ; me Wise RING COIN TR the EN- Guat al the con beh pemeal te a to make it Katy the GRE AE HAT AND DICs TRICK x & ij $9 t e hat, disappears, » found underneath eo} ut not least, the GREAT pi alt CAR TRICK. of or ue from tions are eent for performing each trick. In addition . ® number ae other feats and illusions are a - explained | ie “ghieh you can

toys, yet this tank will keep for toys, It will perform dosens of t) forward at will; 2% inches long. Price only 2

or salves ust stip them over the wrists and you have your pal securely handcuffed. “"These H stand for Law and Order Ay in the heede of the bo: toapire him with respect forte Virtues. They are entirely nickel-plated all over rice on! ¥ 6Sec pair postpaid Male Sex Indicator Hold the MAGIC INDI- CATOR over = man's i content tos, hacks ne ine - ward and f or ward Hold

4 plete and continuous circle. The same action can be obtained over a letter written by s man or woman, ete Tt is fascinating; baffling. We have never been a! out how it’s done—but we've ing feate may be perform: or example, similar resulte can be obtained with animals, cate, dogs, rabbite, over birds, chickens, canaries, ete. Also t termine the sez of chickens and birdr, etc In fact it is sold as a patented egg tester in Europe Price 25¢.or 3 for 65c, pesipaid. ScouT Com- KNIFE e 50c ical Motto Rings Lots of harmless fun and amusement bow these This Scout Knife has 4 Blades—1 Large Spear,|/Tings. Made in atinoid meh and 1 Screw Driver and Cet ak] finish (to resemble plati- ner mitation < met - cquineod whh shackle for belt or ehale num), with wording on 315 inches. Wonderful value at the|C@ameloid, as illustrated. ostpaid. Price only 25¢ Postpaid. The “‘Little Giant” Typewriter A First Class Writing Machine For $1.50 A perfect little typewriter for $1.50. There are thousands of persons who woue like to use 4 typewriter but needs and business do not war- Fant the —_ - attached to the pur- ® fifty or seventy-five

confidently Giant. Itis strongly made, but simple in construction, so that anyone can quickly learn to operate it, and erite idly as they would with 4 and The letters of the alpha most Sdeeatie used are so grouped as to enable one to write rapidly, the numerals 1 to 10, and the punctuation marks being together. With thie machine you can send your best girl typewritten love letters, address envelopes, make out bills, and do almort any kind of work not re = a5 lar, expensive machine. With each typewriter we ag | a tube of ink and maroeene § for —_s ty machine. com- plete

1.50 by mail amtnats te oa any address in ia Sercrs JOHNSON SMITH & CO. &x Racine, Wis.

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182 POPULAR MECHANICS ADVERTISING SECTION TS Ri “ent t SS NOP tates AY, e N SEAS SIS) OC“ For Christmas Gumi C x PARABLE BSG KAA TAN RS -4 When you give an Ingersoll Watch you make a gift that is appreciated out of all proportion to its cost. For there's no gift like a watch, nothing used so much, consulted so often, carried so long. And Ingersoll Watches, made for over 35 years, have a reputation for dependability and enduring service that is world wide and thoroughly deserved. If your dealer hasn't just the model you want, write us giving his name. INGERSOLL WATCH CO., Inc. New York «- Chicago San Francisco YANKEE The new improved model. More close- ly cased, antique bow and crown. Al- ways dependable and sturdy Yankee Radiolite, $2.25. $ 15° » Everybody needs a wrist watch. The time’s in sight—at a — Un- usually dependable Wrist Radiolite, $4.00. S 3 50 Free Trial WHOLE LIFE-TIME of joyispackedinaConn saxophone. You play tunes in a week. Conn’s easy- playing features and new instruction methods speed you along. Pleasure, popularity, in- creased income—all may be yours with a Conn. You're welcome everywhere when you play. Professional en- gagements pay big big money. on this NewConn Saxophone FREE TRIAL; EASY PAY MENTS on anyConni ment for band or orche saxophone, trumpet, t bone, cornet, clarinet, f drums, violin, etc. Ser details, mention instru C. G. CONN, Lid. 1231Conn Bldg. Elkhart, ! ONN eater, NTS wumuss amoas manor y AT HOME Many models of genuine MOVIE MACHINI as low as $3.75, all using standard size big the Our stock of films is the most complete and price—with an exchange service. Films of lea and religious subjects are available DON’T Dt WRITE FOR FREE INTERESTING CATAI PARAMOUNT MFG. CO. NOW! Dept. 1371 BOSTON, MASS. with this handsome sample case filled with Rawleigh Good Health ucts, Toilet Preparations, # Food Prod- Flavors, Spices, etc. Hundreds oi families will buy ”| from you. No experience needed —we show you how. Low prices. Liberal terms, Advertising litera- ture and sales helps free. Good locations for 1500 men and women, Write The W. T. RAWLEIGH Co.

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POPULAR MECHANICS ADVERTISING SECTION 7 tubes single dial —Solid Wainut Cabin ize 28° x13'x10'—Electrically lighted dial—Finest quality low-loss parts—Coast-to-Coast reception—3 YEAR GUARANTEE. etrodyne ALL ELECTRIC RADIO NOW! Areal electric radio set! Costs less than most battery sets. NO batteries—no chargers—no eliminators—no acids—no liquids! Shipped direct from our factory at rock bottom prices and on 30 DAYS’ FREE TRIAL. S“BEREEBEEREHEEBEEB EEUU Agents! Dealers—Big Profits! » Make big money taking orders for Metrodynes. Allor part time. Metro- dyne All Electric Radios are in a class by themselves. Unequalled for qual- ity, performance and price. Demon- strate at home and take orders. est wholesale prices. Your demon- strating set on 30 days’ free trial. “Simply press the switch button and it’s on”’ At last! The radio you've dreamed about! have electricity i If you your home you can now really en- joy coast to coast radio reception without the care, bother and mus¢ of batteries, chargers, eliminators, ete. The Metrodyne All Electric is a real, genu- ine batteryless radi Sim ply insert the plug in the socket, press the switch button and tune in.”’ set than » set Low- You could not possibly buy a better radi Mail coupon below for details. i] the Metrodyne All Electric, no matter what price [SES 882 SB BB Bk Soyou paid. Costs Less Than Most Battery Sets Do not confuse the Metrodyne electric radio with ordinary light socket sets. The Metrodyne is an all electric radio—uses less than 2c worth of power a day Comes direct from factory. ts low cost brings it down to the price of an ordinary battery set. We are so confident that you will be delighted with this wonderful, easy-to-operate batteryless “eee Gorgeous Console oe that we offer to snip it Electric Radio ou for 30 days’ free trial be the Genuine walnut cabinet, in a beautiful two-tone finish. Has a built-in genuine Metro-Cone large size speaker Brings in programs with great volume, repro- ducing the entire range from the lowest to the highest notes with remarkable clearness and distinction. All metal parts finished in old gold. Wonderful electric radio, in cabinet that will beautify any home. MALI Learn about the marvelous Metrodyne All Electric Radio before buying any radio set. Let us send you the proof of quality. Read the letters from thousands of owners. Get our rock bottom direct- from-factory prices and our liberal thirty days’ free trial offer. METRO ELECTRIC COMPANY 2165 N. California Ave., Dept. 614, Chicago, Illinois yout udge. Chicago, Illinois Gentlemen: rHIS COUPON free trial offer. Name Address We are one of the pioneers of radio. The success of Metro- dyne sets is due to our liberal 30 days’ free trial offer, which gives you the oppor- tunity of trying before buy- ing. Thousands of Metro- dynes have been bought on our liberal free trial basis. Write Today! EEE EEE REET EEE EEE TEE EG METRO ELECTRIC COMPANY 2165 N. California Ave., Dept. 614 Send me full particulars about Metrodyne All Electric Radio sets and your thirty days’ If you are interested in AGENT'S prop--> osition place an “X”’ in the square..-_ +

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POPULAR MECHANICS ADVERTISING SECTION e Dept. G-894 OSN. Sinte st. Chicago 11 5 The Old Reliable me TIS Jewelers BROS.&CO. i523 DIAMONDS crevi CREDI Genuine Diamonds Guaranteed WY Diamond Jewelry for Christmas! ZB Newer styles, finer quality, bigger values. We — import our Diamonds from Euro that’s why 4, we can sell to Pay for less. Our rings H yp are solid 18-k white gold, magni \\ [/y,, cently engraved, and set : W/) 4, with gorgecus blue white 6 “ Diamonds of ——- beauty. Order now! . 857 Ladies’ Wrist Watch ‘ Solid 14-k white gold case, 15 $2780 Jewels. $27.50. $2.75 down month Satisfaction guaranteed, or money back. Goods sent for your free examination on request. Credit Bang —1 Pay one-tenth down; balance weekly, + -. semi-monthly, or monthly at your con- \\ — venience. All goods delivered on first payment. i '\Send for Free Catalog /’ Big 122- pege book, Basteating our Diamonds atches, Jewelry, Silver- ware, and gift articles for all occasions, \ sent absolutely free. Write today. mae Be Successful, Look Succesaful’* wn and wear a genuine Diamond! Men’ s Diamond Rings Two exceptional values in men’s Diamond rings. Each ring is solid 18-k white gold, hand carved and engraved, set with a magnificent blue white Diamond. Order yours today! en's strap watch, nickel, cushion sha aoe high-grade mov foment. ‘3 fine leather strap... ss -

6 Ssmet F ng Silene | Be is monds 2.50; 9 wi $52.80; 12 Diamonds, White a wry Woe Your All platinum, o; With 8 Di Qpality Sase; 12 size; sliver monde, 50; 6 er: $703 dial: assorted patterns 2.35 down and $100: -— = by Ws $200 5 al Rallroad Watches — Guaranteed to Pass Inspection HAMILTON No. 992. 21 Jewels. Adjusted to 6 Posi- $55 filled 25-Year Quality Case gions t LATEST RAYMOND, 21 Jew Rans 40. bours one Quality a Ae oe oO ILLINOIS *“*BUNN SPECIAL.” 21 ‘aan Aaj justed to 6 [ecitiene. Gels Sed jas Sear Guaity Case. ag bours $59 D ae © © CREDIT aT casH PRICES

8 adj els. ustmente. winding. _— éilled = =<

Economy Nine Super Retat! price $57.26. This is the lowest priced Super kit of quality that the Radio mar- ket offers. Our extremely large dis- count makes your net price extremely low. EVERY SET BUILDER NEEDS THIS BOOK Every live dealer in radio, sets, parts, accessories, su; etc., should have a copy of this bargain catalog Y ou be amazed at the thousands of money saving radio ites trated and listed in this storehouse of everything y: possibly need in radio. The GUIDE BOOK to Bigger RADIO PROFITS FOR you The book contains all the latest and most popular all the famous, nationally known radio parts, acr« and supplies—the very newest types and designs of ¢ cabinets and consoles—everything at prices that mean | profits for you. Our catalog contains a secti Short Wave Section voted to a showing of the his grade short wave receiving and transmitting apparatus the finest electrical appliances for use in the home DEALE we _ Tie up with a house that carries large stocks, that gives you the highest qua Make More parts, that insures speedy shipments a Price list and discount sheet and catalog Money sent to you on request. But Write Quickty SHURE RADIO COMPANY satisfactory service. Our wholesale vest CHICAGO, ILLINOIS

341D. West Madison Street

Make a MOTOR CYCLE ofyourBICYCLE. CASTINGS‘ Motor or FINISHED MOTORS. © forms ation, 10 cents. Blue prints of | 5 cents, coin. None free. STEFFEY MFG. co. Dept. B, 3924 Fairmount Ave., Phila.

Se LEM ee E 9g Handiest tool in your fe Potte S workshop. GLUE In bottles, tubes and cans.

, Absolutely ~~ Accurate. Fountain SUBTRACT. Ps pen size. Ends all mis- ovicoes takes Send for yours Today. Gut money maker. Everybody inter- r.\ ) my TS ested. Reserve territory immediately. i HOUK apowe PENCIL Co., Dept. - bo Louls, Mo. 4 460+¢% 5 +8102 OK 0.75 = $6820 00 MULTIPLIE PAADEOOSH IH we Pr

Pa

TIRE REPAIRMEN—-WRITE for Booklet No SRAtER Ee R 22 ‘The Vu izing of Balloon ane High = VULCANIZERS sure Tires. The SHALER Co. 2713 «4th St, Waupun, Wis.

Boils 50 Gallons In Less Than Hour No Other Compares With This Improved Oil Burner Use Ordinary Kerosene or Coal Oil : (Burns Outdoors as Well as Indoors; HE most remarkable Kerosene Burner ever built. Boils duwn apple cider, maple syrup molasses, etc., in half the ordinary time. Ideal bur- ner for dairies, butchers, indispensable on the farm. PRODUCES TERRIFIC HEAT WITH ILEN FLAME So efficient it pro- ducestwicethe amountof heat of City gasat halfthecost. So simple anyone can install end epenans. Double generator assures continuous operation without shut-downs. Nothing to wear out, starts in a jiffy, will last 2 life —_ see burner guaranteed fully. Write for 8 ial introductory price and free catalog of ou! oor utility and kitchen stove oil burners. HOME MFG. CO., Dept. 1413, 18 E. Kinzie St., CHICAGO

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POPULAR MECHANICS ADVERTISING SECTION g" 21,! JUNIOR For the Machine Shop— Manufacturing Plant —Service Station and Electrical Shop ~* O ni $] 5 0 The NEW MODEL~— Back Geared — Screw Complete with Countershaft and Equipment Easy Payments If Desired This New Model 9" Junior South Bend Lathe is built in the same plant where 38,000 other fine Precision Lathes have been manu- factured for the United States Government, Ford, Westinghouse, Bethlehem Steel Co., U. S. Steel Corporation, and hundreds of other large industries in the United States and 32 Foreign Countries. It is the world’s greatest Lathe value. Features and Specifications Power Feed to Carriage Set-over for Taper Turning Sp pl indle Speed. Width of Belt.... a 1 in. Maximum Draw-in Collet eS iS 14 in. mber of attachments can be fitted to the Lathe for doing various work. Small Down Payment Balance in 10 Equal Monthly Payments A small down payment brings you the Lathe to use while you are paying for it. In this way it earns its own cost by the work it does and the savings it makes. OTHER POPULAR SELLING SIZES Complete with Countershaft and Regular Equipment Size of Shipping Standard Quick Weight Change Gear Change Gear 490 lbs. $235.00 $270.00 725 lbs. 300.00 335.00 1110 lbs. 352.00 402.00 1550 Ibs. 430.00 490.00 2035 Ibs. 510.00 570.00 8’’x10" 2840 Ibs. 685. 750.00 The complete line ranges from 9 to 24-in. swing, and from 2% to 16-ft. bed. te for name and address of your nearest dealer. Free New Booklet 22-K and Complete Catalog No. 88 Our new 20 Page Booklet 22-K describes the New Model 9" Junior South Bend Lathes in all types and drives—165 illustrations—sent free on request. Complete Catalog of all South Bend Lathes will also be mailed postpaid. South Bend Lathe Works ,**2, — aw New hence City Snare, 183 Centre Street “a—.¢ oe 3 Precision Lathe = & NNN 9" x 214" New Model Junior South Bend Lathe with floor legs, countershaft and CS 5.6.0 660440006050000006i50000Nee Operates from lamp socket— 14H. P. Reversing Motor connects directly to nearest lamp socket for power. 9" x 21¢' New Model Junior Self-Contained Motor-Driven Bench Lathe, complete as shown .. $22

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POPULAR MECHANICS ADVERTISING SECTION | | ney Back Guarante Font One GB SAW | 4 The S&B 8-in. Combination Saw (18 A Sensible? tools in one) is the ideal machine for the € shop, factory or the home; will rip, cross XMAS GIFT cut, bevel, miter, mortise, groove, drill, Nowvyou can makethe tenon, grind, rabbet, buff and polish. 7 The greatest machine you ever things you wanted saw; no other machine so complete and efficient as the S&B—actually Wuh table raised—saw 1Stoolsinone! ot ts guardedr rad (n err You will mar- ing, PIATT or velat the wonderful beveling, Ready for grooving, buf- planer head an fing, ete All molding we ri attachments F. O. B. are adjusted Re Tightener ina ew CHICAGO seconds with- Planer attachment out any difficulty. Very little space is used and the motor is mounted on a base ~—~"0St practical ever that is a part of the machine proper, this is an exclusive feature! The motor: 244?%¢ fo @ saw table. ‘4-H.P., 60-cyele, 110-volt A.C., run from any light socket also provides power for other p irposes when the saw is not in use Complete with attachments: 12-in. x 16-in. Table, 8-in. Combination Saw, Iron Pulley for Saw Table, 10-in. > . Ripping fence, Adjustable Cut-Off Miter Gauge, Motor 4-H.P., 3-in. Iron Pulley, ae or 6 6-in. Buffing Wheel, 5-in. Emery Wheel, 6-in Sander, % in 3-Jaw Drill Chuck, good for metal ; 1 ‘4-in. Endless Leather Belt, 8foot Cord and Plug, Saw Guard and 2-in. Dado routing, grindin Insert. Price $35.00, F.0O.B. Chicago. Shipping weight 100 Ibs. castings, e Planer attachment to fit on table top will smooth pieces up to 2 in. wide, $12.00 extra. Flexible Shaft Grinder attachment, $35.00 extra.) Write for Complete Illustrated Folder The only machine that SCOTT-BANSBACH MACHINERY CO. 45° “wluhout removing 120 So. Clinton St. Dept. 59 oecsace, a1. “Sateen... on patiern work. CRE RI CE CO OP AG RR ONE OS PS PS TH “iy Make Money *2enu% B | AFEWDOLLARSSTARTS YOU Universal and Keenedge Skate Grinding Holders As used for Lengthwise and Cross of skates. Price $5.00 and $3.50 « ticulars on request. The Original Skate Grinding Holders. Ferodowill Mig. Co. 20258" Ssh" New Improved 1928 Model Absolutely Guaranteed No more worry with ‘‘B"’ Batteries! Hook Converts any ordinary up a Perfect B"’ Battery Eliminator and =} an stove into gas range. Pro . forget battery troubles forever rhis won- | { eoos duces clean heat m derful new invention means better reception, and is far more effi- sharper tuning. Gives you more real pleas- | cient than coal. Burns 96 ure from your set. and 4%, kerosene. installed in aed minutes i « | Types for al! heating purposes. ‘e distributor war No Tubes, No Harmful Acids, No “Extras” to Buy GLORIA LIGHT CO.. 111-12 N. May St., CHICAGO Does Away With COAL! Operates JP: aenym tly on direct or alternating current ving 1D te » BO ve ne # current, and using hv “ dire iinas matinee anyone can on t int any kind of eet up t ox ¢ sbes , nt H — voltage gives more power Costs no more than set of a *B” Batteries. | | LA i 4 t H our ¢ Salesmen anc gents wantec everyw rere to se SEND YOUR ORDER NOW | F cantiieinn Mteskses ana emaamanameveoestl gm & - day ~ 4y- r gE make $25.00 daily, upward. Sold day or evening and addecas rt. © ¥ paper, pina dollar store, office, and home is a prospect. Easy metho mar oO 4 « r n . . . ‘ | it TODA > wham a ~ | play. Cash sales; no order taking. Send quick! t % more chan entinfed, | sample and literature. t get you 2 y back 35 volt “B” | _e gst cmnater GSS. Send G5 with order | | CONSOLIDATED CO., 65-A West Van Buren St., Chicago ay pute nan balance on delivery. PERFECT ELIMINATOR co. | The man whe studies gets ahead. Popular Mecham Press will advise you what books to read to adyan« N-21 National Theatre ez Cincinnati, 0. | your trade. 200 East Ontario Street. Chicago, 1! , ae 22 CAL ALL GIVEN L. RIFLE od ell pry Ne Watch with ciate and ring. at 15¢ 4 a ay Send for 20 bottiesand choose gift as per offer inour catalog. We trust you—justwriteto RELL PERFUME CO., Dep. C 153 Chicago, Ill.

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POPULAR MECHANICS ADVERTISING SECTION O Days Tria One Dial a @ “r] J NOW ,—vyou can get the finest quality Radio, DIRECT FROM FACTORY on 30 Days’ Trial and save almost half. Now you can put any of the new 1928 WESTGALE models in your home and use them to your heart’s content for 30 days at our risk. Listen to the music, concerts, news, sports, market reports from all over the country. Test the Westgale Radio for distance, selectivity and REAL Tone value. Compare it for quality and price with any other Radio. Then if not convinced that Westgale gives vou the biggest value for the money—YOU DON’T HAVE TO KEEP IT. Westgale Sets are Licensed Under R.C. A. and Associated Companies Patents if For the 4th consecutive year Westgale offers you the SP CN CO SOP CI CE CEE SEP ORR OEM SIPC CINCO GENE ON CORY OO CE eae PENING ATES newest and latest in Radio at lowest prices. Our 192 28 mode ls: are licensed under the basic patents of the « 2 See See \ssoci d &TSYOU ; Why Not C ompanies a ire u dependable nedge Beware « f n ad Ra Why not have olders Be Our Agent? best? Why pay high prices? “Why take chan you can test out any Westgeale model in y it cost. We want home on 30 Days’ T il? Our retail price Dealers in everv local- factory prices ean eget peed wd ! and take orders for « =r now 1926 catala id see for yourself Indians Ave f e amazing new 1928 Westgale y ., MINN \ } ; - , > y ‘ _- fodels, This le your chance to Finale 24 Styles to Choose From 1 big money Mi llions of radios Table ana egal Luxe Cabinets i this season vs a Westgale set on rrial emonstrate to your ce sand get your share of these big radio This season Westgal and 4 beautifu re Your Own Radio FREE rn nd oven for effi Our new Catalog : also. e xpi ins a plan whe Te- en n put a Westgal lio in your home o1 lrial—demonstrate F to your neighbors ar ‘d GO f sin your spare time and get y an outs ant without efore the trial period is up TY | T peaesamecancss Special at Discounts to Agents and Dealers | : . To quickly introduce these w og nn ago, Ill ; ’ } 1928 mo ele we are offering for ——) : ; 4 mited time a bi “duction, ws ny Fe } prices on the FIRST Westg ile set place d ir Sane each community. So get busy now. Be first Tl: oi in your locality to n a the coupon for ou : Hes , ; — a FREE catalog and get full particulars of this _— > special discount offer. Westgale Electric Co. Dept. 112 Including Speaker 1751 Belmont Ave. Chicago, Til. Retail Price

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New York POPULAR MECHANICS ADVERTISING SECTION Nea Service OR twelve years Cunning- ham Radio ,Tubes have been providing dependable tube service in millions of radio sockets. You, too, may enjoy unfalter- ing radio reception by equip- ping your set throughout with Cunningham Radio Tubes. Don’t use old or inferior tubes with new ones—use new tubes throughout. To keep your set at peak per- formance, retube throughout with Cunningham '- Radio Tubes at least once a year. Your dealer will tell you the correct types for which your set is designed. E. T. CONNINGHAM, Inc. Chicago San Francisco | | | The Famous AERO SHORT | WAVE KIT NOW IMPROVED LOW WAVE TUNER KIT Code No. L. W. T. 125 Price $12.50 Always the prime favorite of all experts and amateur insistent upon the very best im short wave recep the AERO Low Wave Tuner Kit for this season ha been made even better than ever! Range 13 to 725 Meters The AERO Low Wave Tuner Kit illustrated abov completely interchangeable. The kit itself includ coils and base mounting covering U. S. bands 2 and 80 meters. You can increase the range of thi to 725 meters by use of AERO interchangeabl: No. 4 and 5 (Price $4.00 each) or you can decreas range to go as low as 13 meters by use of AERO i changeable coil No. 0 (Price $4.00). By all means build the new AERO Short Wave S& The AERO coils used in its construction can be | cured from your dealer or direct from our factor We have also arranged to furnish the Westing! Micarta drilled and engraved panel for this rece direct from our factory. Write us at once for information, AERO PRODUCTS, Inc., Dept. 107 1772 Wilson Avenue CHICAGO, ILL. PLUMBING - HEATING WATER SYSTEMS — SAVE UP TO 40% Wonderful bargains—every- thing guaranteed. Full line of plumbing and heating sup- . lies. Hot water, steam heat- ng plants and fixtures and water systems at big savings. install Them Yourself | Finest materialsal! brandnew and perfect. Tell us your 4 re wants and mail us a rough \\ a (eta Sketch of your rooms, — 5 SEND FOR PRICE LIST B. KAROL & SONS CO. 300s NP iicco New Modeis now ready for delivery § direct from our factory. Astonishing low prices and terms. Do not buy until you get them, RIDER AGENTS WANTED to ride and exhibit sample. Make big money. Many models $21.50 up. . Guaranteed $1.50 each, wheels, i Ss lamps, horns, equipment at usual prices, Send No M ; £9 Pay YOU “7 \100aWeek oney. Write for Make $100.00 a week and up, sellir fine made-to-measure, all-wool Biggest values—positively sell on sight. aid im advance. We attend to dc: y ‘e ge $i ee - ~~ direct to wearer. gest Commissions and collections. x9 cloth samples —over 100 styles— furnished FREE, Ambitious men write at once. W.Z.GIBSON, Inc., 161 W. Harrison, Dept. M516, Chicago

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2.50 teurs stases i aS le ; ; — t Set No. 900, ina hee indsome folding leather ouse ise, is made up of 6 inch yrmbination Square, com- center punch, 6 inch flexible steel rule in pocket é enter gage, 4 inch ] inside and 4 inch outside pers with solid nuts ILL. i 4 inch dividers with ———— or so ory - & line Sta; ~ jup- B tRETy sat- OOK j and ] cn 3. ACH Apr INig j " “ q if RENT: ES ew our igo VE. GO ) The Starrett Book for Machinists’ Apprentices, Volume I of the famous Starrett Books, contains answers to the many ques- tions the beginner will ask Every apprentice should have this book. Ask your lealer for it Price 75 cents Use POPULAR MECHANICS ADVERTISING SECTION a hope to tell you that’s a real present!” Any man who is mechanically inclined will appreciate a gift like this. The Starrett No. 900 Set is a kit he will be proud to own. It contains just the tools he needs to get started on precision work—each one of them made with the accuracy and quality which has made Starrett Tools the standard for good work- manship the world over. Your tool dealer will gladly show you the Starrett No. 900 Set. Ask him or write us for a copy of the Starrett Catalog 23 “AP” illustrating and describing more than 2500 fine tools. THE L. S. STARRETT CO. World’s Greatest Toolmakers Manufacturers of Hacksaws Unexcelled Steel Tapes—Standard for Accuracy ATHOL, MASS. RR La ¢, ao ools Starrett licage 1328

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POPULAR MECHANICS ADVERTISING SECTION Transformers An Amazing Achieve- ment in Audio Ampli- fication The new C-16 and C-25 Transformers will work in any circuit and will im- proveany Radio Set. Endorsed by America’s Leading Engineers. Guaranteed by the Man- ufacturers Two additions to last year’s Radio Sensation H.F.L. C-16 is the most efficient Audio Trans- former built. It carries signals at highest volume and lowest amplitude without blasting or developing harmonics. Operates with all power tubes as well as standard tubes. H.F.L. C-25 Output Transformer handles the voltage output of power amplifying tubes, at the same time matches the impedance of the average speaker to the tubes. Protects loud speaker unit without reducing plate voltage. Mechanical features of these two transformers are: A coil designed and treated to exclude moisture and withstand heavy electrical surges without breaking down—complete magnetic shielding to avoid inter- stage coupling—terminals brought out so as to in- sure short leads. PRICES H-210 Tran. $8.00 H-215 Tran. 8.00 C-16 Transf. 8.00 Transform. 5.50 C-25 Output Transform. 8.00 SET BUILDERS! Write Us for the Name of Our Nearest Distributor HIGH FREQUENCY LABORATORIES 133K—North Wells St., Chicago, Ill. | | Exclusiv« Licensed Technid Corporat Under U.S} ent No. 159 July 27, 1926 The Perfected Volume Control! “Tonatrol’ A True Tone and Volume Control [tonarRot |] III" Your neighbors will envy the ease and convenience with which you secur every gradation of volume if you us ‘'Tonatrol.”’ This new tone and volume control enables \ to change from soft music, clear and sweet powerful house-filling volume a second after \ helpful addition to any receiver. Construct: to last with genuine bakelite. Very simpk install Tonatrol Standard Volume Control $1.50 Type W. 8 switch attached Tonatrol with $2.00 filament Write for free installation booklet for th« proper way to control volume. Dept. 66C, 175 Varick St., New York, N. Y. 53 MAKE BIG MONEY “RADIO DOCTOR $7 to $10 a week spare time evenings. $50 $ after short training period rHIs IS A NATI RADIO SERVICE ORGANIZATION THAT NI MEN. Send for booklet No. 27 now. CO-OPERATIVE RADIO DOCTORS 131 Essex Street Dept. L SALEM, MASS. We teach you At Home by Mail to mount Birds, Ani- mals, Heads, Tan Furs and Make Rugs. Be a taxider- my artist. Easily, quickly learned by men, women ap boys Tremendously interesting and f yp! Decorate bome and den with beautiful art . Profits from Spare Time Selling Specimens and Mounting for Others. Yes absolute! Prec—benatifal be books Free Book= (fino) abest how to learn dermy. Send Today. You wil! be delighted. Gon't Delay! Northwestern School of Taxidermy Samana, wi s. You-and This New Machine CanEarn $500 aMonth Operate a Tire Repair Shop ,000,000 Tires in use. America’s gr® eaeity for men with small car a furnish everything— $100 and up. Geer pay- es ine money at once, Write today for Fre . Steps te Success Haywood Tire Equipment ba 1334 South Oakley Chicago, Iilin e Book

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POPULAR MECHANICS ADVERTISING SECTION —tf KNAPP WORK SHOP All Who Love To Make Things! Model Makers, Amateur Mechanics, Experimenters, etc. Study the specifications of this ultra-quality line of de- pendable machine tools, selling at prices you can afford. You can easily see the great advantages of owning an out- fit like this. It can accurately handle the small turnings and do saw work, that now take so much time doing by hand on ship models and other work, and at the same time it is big and sturdy enough to handle up to 44" lumber in the saw, turnings 23¢"x 5” and will drill not only wood, but metals (iron, copper, brass, lead, aluminum), bakelite, celeron, slate, radio panels, etc. It has been especially design- ed so that it can do not only the ordinary work but very small work as well. It is operated by 4; h. p. 110 volt a.c.,d.c. motor, the cutting tools are the best tool steel, the drills and saw blades of high temper. Coming with the out- fit is your first piece of wood for turning, wood stamped with de- sign for sawing, and illustrated instruction book, belting, and all tools. Outfit comes completely set up, ready to plug in to an elec- tric light socket. Motor costs less to run than a 75 watt lamp. Or you may buy any of the tools separately. This outfit is a worthy addi- tion to any work room, and is handy in a hundred ways. Go to your dealer and see a Knapp Work Shop — hardwar sporting good tores, or department stores (toy dep’t usua send 10c. in stamps for full color cat fully ribing Knapp American in Miniature Workshop No. 990 complete $2,°7°5° Denver West $30.00 If your dealer is out of stock we will send for price plus carrying charges. KNAPP ELECTRIC CORPORATION, PORT CHESTER, N. Y. DEPT 89 cAlso Manufacturers of Knapp Electric Questioner ror sace By &T, EATON C2... CAN AODA KNAPP LATHE No. 930 ANO TOOLS Knapp Lathe, No. 930 Turns wo 1 ur 4 - ) ) C pu ting ti ey $6,00 Denver West $6.50 Shipping Weight 4 ibe. Samples of work done on the Knapp Lathe with itfit 935. consisting of : eresting and useful and tem- pine ‘ in ] ng fr ym s in. diameter. Outfit 935, $1.25 Shipping Weight 7 Ibe, Knapp Jig Saw No.900 Capacity up to % in. lum be ilso bakelite, ce leron ‘ making ae “ ‘ eady I ting and 3 blades furnished. $4.00 Denver West $4.25 Shipping Weight 3° Ibe, Sample of work done on Saw No. 900 from Outfit 902 wi h consists 20 board 4 xz i2 = 3/16 it 112 designs for everything ‘ ? } ractical Outfit 902, $2.00 Shipping Weight 6 Ibe

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POPULAR MECHANICS ADVERTISING SECTION IWant toSend You a ae Fe Special- Wajfch i {oy am (0) | f,_ i ii cold it is this w to see and oO burner in your farmace oi 4 | give you awomatic, clean, econ heat Needs no attention ; requires no adjustments and 1 dirty coal “ handle . ve adaptable sisee—each Lp i TY ie ] he Ma > " e today for full details telling iow tle Oa ill give — »u trouble-pr able, economical heat. DEALERS!) /ACO GAS BURNER (0. Write Today for Terms —_— 2s....,lUuwe =) - ay How Does This Sound? $2.00 ¥o $3.00 an hour at home during sp or a good steady income im business for you clean, dignified business. ‘No canvassing. Pleas easy work. No studying, no rent, no experienc: FOLEY Automatic SAW F! LER The business is already waiting for you if you Foley Practically every home has saws t regularly. You can get the filing business manual training department of your school. ( contractors, factories and dozens of others w regular customers. You get $.50 or more for « The Foley does the work automatically I joints all kinds of saws. Electrically driven. Tt Santa Fe Special opportunity for the man who honestly wants t = one} If you are that man, write for free Watches are today be- DMortich Senton 3O — - LE FF EO ivilized ntry in the rf ciotlized country ine Daf Free Trial FOLEY SAW TOOL CO., Inc. ably the best and most 222 Foley Bidg., 9 Main St. N. E. Minneapolis, Minn. favorably known watch in both Army and Navy. OS — In addition to our NEW LOW PRICE, I will send for your approval one of these Standard Watches, guar- anteed for a lifetime of satisfactory service, not only by the Santa Fe Watch Company, but by the Great Illinois Watch Factory. So accurate, Government officials carry them; so perfect and beautiful, jewel- = say a - oe worth 1-3 to 1-2 more than we ask pos RE Cc ING LATHE them. will send you one to see WITHOUT ONE TH I TT TY PENNY DOWN—allow you to wear it 30 days FREE— | AD I 9° « ane then sell it to you on easy payments. . s bg a ad —— he ; : = y é ré WHY NOTOWNA 21 JEWEL SANTA FE SPECIAL WATCH ? attachments and tools available. y You will never miss the few cents a day that will make 12” Band Saw Ci you own one of these watches—SEND FOR WATCH Powerful, practical. Notatoy. Price BOOK —illustrating in beautiful colors hundreds of Has tilting table. Saws 6" stock. and ot aire, 108 combinations in cases in the POCKET Bronze bearings chines A S STRAP WATCH and LADIES’ tore F Fernwood Ave WRIST WATCH. You can have your name or mono- Ressbacher Machine Co. EDO, OHIO gram and any emblem you may desire engraved in r Yor the Case to suit your own ideas. Write today for Free o ee ee. and make your selection at once, while Oo a D ay, this offer lasts. — and a FREE A limited offer! With every Santa Fe os beautitul gold chain or strand of exquisite pearts S rite qui k for new prop sition. We offer Write today. M atl coupon for both Watch and Diamond C atalog $8.00 a dav and a new Chevrolet Coach WRITE FOR SPECIAL 30 DAYS CASH OFFER for demonstrating and taking orders for SANTA FE WATCH COMPANY Comer All-Weather Topcoats and Rain- Dept. C.-6 Build | coate. Spare time No experience re- Pp «0, Thomas Bui ing Topeka, Kans. guired. Sampk ‘outfit free. Write now. (Home of the Great Santa Fe Railway) Mail i SANTA FE WATCH COMPANY / Dep!. C.-6, Thomas Building, Topeka, Kansas Please send prepaid and without eniigation t your Watch Book Free, explaining your o- / Money Down" Offer on the Santa Fe Special Wat« h U day! / It’s a wonder 4 Name - a - for power and selec- as tivity. Famous ARL circuit. Coast to coast reception! Finely built of / selected, tested parts. Thousands now in use. Address FREE Log end Call Book and New 152-p. Catalog with thousands of nationally apeertiaadvareains. Latest in radioat big savings. Write for Free copy. / City : AMERICAN AUTO & RADIO MFG. CO aodiube , waseanaiene HARRY SCHWARTZBERG, PRES Dept. 261 Amoricen Radic Bidg., Kansas City, Me. coupon

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POPULAR MECHANICS ADVERTISING SECTION A * FREE Ee ees Battery or asstiticins OPERATION RY this powerful seven-tube RANDOLPH RADIO for Ti rty days. After it brings in stations from coast to coast = amazing ea dial tuning—after it after y Tare more than eatiehed hem nen wenennieertedionss at factory prices. Every RANDOLPH must make good before it is sold. This RANDOLPH can be had for use with batteries or connected direet to the electric socket— absolutely batteryless—no batteries, chargers or acids—just plug in and tunein. 100°, "efficient either way. Its construction and performance have been tested and approved by leading radio engineers and authorities— by leading radio publications and laboratories. 7 Tubes—Single Control IMuminated Drum rom dial operated by one simple vernier contro] tunes in all ns with easy selectivity to tremendous volume. No ~~ § stations. Illuminated drum — operation in the dar -ontro! for finer volume modulation. This is a sever-tube | radio frequency receiver with power transformers and power plification. Space wound selenoid coils. Full and completely shielded. Tremendous distance, wonderful tone quality, simple to operate. Beautiful Walnut Console Built-in Cone Speaker e Randolph Seven-tube Ampliphonic Censole illustrated above is housed in a genuine burl-walnut cabinet with two-toned hand rubbed finish giving it unsurpassed beauty. The same expert cabinet work e into the making of these consoles as in the finest furniture. Has Duilt- in cone loud speaker that compares with any on the market. Accurately reproduces complete range of musica! notes 7- Tube _—— from the highest to the lowest pitch. What Users Say Single Control I have logged more than 50 stations from coast to coast.—Lloyd Davenport, Littlefield, Texas. I have log ed fe et stations from Cu RETAIL PRICE Y Seattle, the set is a world beater Tompk kinson. ty Mich. ir set is a revelation, has all a tied to the post for distance d selectivity.—Waldo Powers, Vergennes, Vermont. On strength Completely Assembled of its performance sold two more sets this week.—T. Scaniow, Or’ , Florida. 4 gimme 3 \\ of part los y janes 1 mm Wore ti Bees is de 2 e hav ou goien The Randolph Radio Do not compare this set Corporation are pio- with S igh dial 6-tube — in oe —— sets selling for about the acture o 108, same price. The Randolph Long and successful Randolph Radio Corporation = Senior Six has also experience in — 711 W. Lake &St., Dept. 390 een tested and approved radio business makes Ch by the leading vedio engi- us perfectly confi- icago, Hlinois neers. dent in sending a me full postiouiors about the RANDOLPH Six and Bea al solic . Randolph Radio on Seven Tube All-Electric and Battery Table and Console Sets utif al ud waln at cabinet, Single trial We know what with details of your 30 Day FREE Trial Ofter. um with space f« " 2 it willd lust Very selective t for 30 Centro] Sido. Mailesthe coupon fer the greatest Name .......... Day's FREE Tria radio offer ever made, RANDOLPH RADIO CORPORATION «#.~ City , 711 West Lake Street Dept. 390 Chicago, Mlinois Mark here () if interested in Agent’ s amen,

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POPULAR MECHANICS ADVERTISING SECTION A reliable BENCH LATHE at a price you can afford No 125—$40 F you don’t require ultra precision, but do want a reasonably accurate lathe, this one will serve your purpose and meet your pocket- book. This lathe is sturdily built and dependable, No. 132 Slide Rest and is designed especially for use in trade No. 128 Turret Attach- List $17.50 schools, repair shops and the home workshop. ment. List 350.00 It has Milled Bed and Tail Stock with Milled Base, both Screw and Lever Feed and 3-Step Cone Pulley. Capacity: 7” swing; 12” between centers. Live Spindle fitted with cone bearing. Measures 25” over all and is 11%” high. No. 125.... List $40.00. No. 494 Bench Lathe is similar, but has larger T Rest and longer bed. Capacity 7” swing; 18” between centers. List $44.00. Either lathe can be driven by a “4 H. P. motor. Ask to see these Lathes and Accessories at your dealer's. Or write us for Lathe Booklet, which will be sent FREE on request. No. 194 Saw Table . —_ GOODELL-PRATT COMPANY, GREENFIELD, MASS., U.S.A. __ : (sa pee luded) os ead rR No. 130 Countershaft ist $17.50 MAKERS OF Sovtemiths, MR. PUNCH List $12.00 GOODELL PRATT 1500 GOOD TOOLS

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POPULAR MECHANICS ADVERTISING SECTION Installation FREE/ ‘your FatSetiniaS — uel ac tio S et! (2%. ~Your B Power The Marvelous New Model wag bee Built for All Radio “ All In ONE Power Tubes Cobinet and Yes, any Authorized Philco Dealer or connect | Will Deliver the wonderful Phileo AB Socket Power to your radio set— 180 Volts whether it is an old set or a new set—at no extra cost to Lat 60 Mit amperes - you. Installation is FREE! ————“ Turning On Your Electric Light! No Matter What Set You Own— Merely snapON calnsin > set No Matter What Set You Buy — switch when you want tolistenin. ~— it OFF and your radio is silent. Philco Will Run It From the Light Socket! | “* “2° . Every Philco It makes no difference whether you now have a dry cell Guaranteed! or storage battery operated set or what kind of battery radio set you ns buy, the Philco AB Socket Power will run it from the electric lighting current. Pp Each and rey 4 hewar a AB Socket Here is your chance to do away with the ordinary “A” storage battery and all eerie ie nominee ccatiinaancien Wieden : . - antee and 1s built to conform to Underwriters’ dry cell “A” and “B” batteries. Super-power for all power tubes! No hum! Laboratories Safety Specifications, No distortion! ‘No more recharging to do! No more batteries to replace! Console-Cabinet Easy Payments! Models You can buy the New Model Philco Console-Cabinet Models are built to AB Socket Power from any Authorized Philco SC enecte the cabinets of practically all Dealer on Easy Payment Terms. Merely make well-known radio sets, including a tee ee rag “hag Atwater Kent Crosley Pfanstiehl a small first payment and pay the balance Freed-Eiseman Fada Radiola-28 monthly. Victrola-Radiola Brunswick-Kadiola Special Philco Units have been de- Trade In Your Old signed for Fada, Pfanstiehl, Freed-bise- “ay? Ee. Sohoderl and Vistrele Ienticls ane cnt The Famous Philco AB A Storage Batter . tested and approved by these companies ~ S 2 . . = a Naas? eed You won't need it with the Philco. Any Authorized Philco Dealer will make you a liberal allowance for your old A” storage battery when you buy the brand-new Philco. Clip and Mail Today! Mail This Coupon NOW! "om Just sign your name and address to this FREE Coupon, put it in FREE COUPON an envelope and mail it to us. It does not put you under the slightest obligation. To Philadelphia Storage Battery Co Then we will send you at once full descriptive literature on the New Model Philco Ontano and —_— Dene. 1498 AB Socket Power. We will also send you the full details of our liberal offer of Easy Pumadegema, Oe. -, I shall be pleased to recrive © free illus- Payments, Free Installation and Trade-In Allowance trated Recah son describing he eos Philco Radio AB Socket Power; also the full details of your Easy Payment, Free Installation and Tr Philadelphia Storage Battery Co. # ** 5% Ontario and C Streets etme Philadelphia, Pa. pcx

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POPULAR MECHANICS ADVERTISING SECTION A Mechanical World In Itself Those who go through the Brown & tools is recognized as setting a standard Sharpe plant very frequently.come out of accuracy by mechanics in shops all with the impression of having visited a over the world. mechanical world in itself. Hardware dealers everywhere carry Every facility exists in this plant for Brown & Sharpe tools. If, by chance, making Brown & Sharpe precision tools your dealer does not happen to have a with almost unbelievable accuracy and copy of our catalog, we will send you for testing them with painstaking care. one free on request. DEPT. P. M. BROWN & SHARPE MFG. CO. PROVIDENCE, R.L, U.S.A, BROWN € GHARPE" TOOLS “‘World’s Standard of Accuracy’’ This work is done so well that the BS performance of Brown & Sharpe LIGHTING FIXTURES hues Ready to hang I : atiaiaeel , Direct from the manufacturer. Complet Awest wholesale prices wired, including glassware. Send for on highest quality Grade = ; A goods. Any Handy Man new catalogue No. 28. Just Red can install his own Plumbing Prices. Special Proposition to De and Heating BY eo R NEW EASY METHOD. Get the best | Erie Fixture Supply Company, me. and pay only a littleeach month. Station A . Send for FREE Book With New bargain catalog just issued our cut-to-fit systems you save waste material and high labor cost. 50 years Q u : c K, E A Ss Y P R oO F i T Ss! ! of economical service to home owners, farm- Practically ne investment. Small space r (ade ers, builders and mechanics. Million Dollar quired. Steady demand and BIG PROFTI | r "lants back up our Bonded Guarantee. = | refinishing autos, furniture—painting hous "REE book gives you the whole story. and barns with HB quick spray method. Spr Write for > equipment for Duco, Paint or Lacquer rec . mended by car manufacturers. One ms an & ¥ e ry . the work of five with brushes . on easy monthly payments -17 West Pershing Road, Chicago, II. iH TRIAL. Write today for details. Hobart Brothers Co., Box M1271, Troy, Ohio —

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POPULAR MECHANICS ADVERTISING SECTION Win F.Clausing Our big new catalog—showing all standard make typewriters in full colors is ready. Reduced prices are in effect. Our 25,000 satisfied custom- ers prove conclusively that we save you over one-half by our direct-to-you selling plan. Your Choice Underwood ~ Remington DOWN L.C.Smith — Royals On 10 Days’ Free Trial Just think what it means to get any one « ly $2.00 down brings you your F } a 195, a a. en world-famous standard-make amous $2 down. That is what this remarkable off ters—direct from our factory, on 1 if you act at once e Tr jalance of great cet os ater aaiama ane aon Van- Sant Special Limited Offer asnlee 1) eave . y limited time onl we at ve the v rt : ; over 50% ee Course in Touch Bs lowest. Every typewrit- 0-year written guarantee of per- lypewriting , - e - e Every Typewriter a Bargain g offer enables you to try yo international Typewriter Exchange, ter 0G fu ‘ es Free fore on Vv ip-to-date prov : ‘ludin } r al offer at Delos 184 W. Lake Street, Dept. 1294, Chicaco. Gentlemen our big Free Catalog showing r - Please send me you Sneed . very +hine rices on all standard-make typewr r bran rial. and Free Cour Why Pay Full Price ew | Now. Learn how Internationa ‘ ! nig gr standard-make typewriter, ss than half the regular price expiains our easy monthly payment plan,—over a year to INTERNATIONAL TYPEWRITER EXCHANGE 184 W. Lake Street Dept. 1294 Chicago, Mlinois and

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They are Enthusiastic All three Eliminators received from you working well and the owners are entirely fied to say the least One satis is working on 60 Dallas, Texas You will be enthusiastic, too! ‘Townsen Socket Power Approved and passed by the rigid laboratory tests of Popular Radio and Radio News. Peters

66 only $1.00 to this coupon

POPULAR MECHANICS ADVERTISING SECTION Sensational Succ eSS e Over 25,000 sold . Lhe 1Xst O months

eycle current, another on direct current, and Overwhelming evidence that VALUI s quick to b the other is on 25 cycle current in Windsor preciated Canada I am thoroughly convinced in your statement that they will operate on any light T, : ' . os Ve 3 at : . >? ing circuit or any frequency. J. G. Mullan Unsurpassed quality is built into the Townsend “B” S ti Detroit. Mich with money saved by untfied product methods and low , Wish to tell you I consider your Eliminator the costs best piece of radio equipment I have ever bought I was surprised with the fine per- You get more—you pay far less—for the most remarkable valu formance and construction Ed Seager, Ham- today ilton, Ont., Canada : I could scarcely wait to report to you the fine . results of your Eliminator. Since receiving it New thousands of Radio set owners are learning this d b 2 the house has been filled with fine clear music, Townsend “B” Socket Power the local stations tune very sharply and the ee ae ade te Pace natin. te an Sold on REAL GUARANTEE OF MONEY BACK IF_NOT SATISFI want to use noisy B Batteries again. It is the Delis : 100 | D. < p 2 best bargain I have struck and I wish to com- elivers up to 100 volts on any set, on eA any pliment you on this Eliminator Frederick tone, clarity and volume Lyon, Seattle, Wash Have been using your Eliminator since last Sy a February and it certainly works tine Fred A MV Tab OUT pon an Send Order Today Fern reer aonb mail it at once promptly postman do everything we say, return it to us ar price will be refunded. Your Townsend “B" Socket Power Unit will Deposit only $5.85 plus postage with the Try out for 10 days—then if it does not

1 purch ase 99 Townsend Laboratories 713 Townsend Street, Dept. 15 Chicago, Il.

TOWNSEND LABORATORIES, 713 Townsend St., Dept. 15, Chicago, Il. Gentlemen: Attached find $1.00 Kindly send at once T “B” Socket Power Unit, C. O. D. for $5.85, plus postage anteed 10-day free trial Name Address City . er o State..

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POPULAR MECHANICS ADVERTISING SECTION 199 “Why-It's a Whole Machine Shop /¢ —that is what Users call the EIFEL-FLASH Ptie- Rench KIT, because instead of using a dozen tools on One job they do a thousand jobs with the PlieRench KIT alone! And if this page could show “ Mechanics’ readers what this Kit can do for them, the Kits re- served for the Special Offer below would not last one day, but—space permits only ‘‘a word to the wise.” Helped Win WORLD FLIGHT USED BY U.S. World Flyers; on U. 8. 8. Shenan- doah, 8. 8. Leviathan, U. 8. Army, Navy, and Mail Pianes. By MAKERS of Buick, Chevrolet, Nash, Packard, Reo, Studebaker, etc., Automobiles: each with its employees buying from 200 to 1000 Kits Thousands of Housewives are using the PlieRench too, because it is the only tool giving a woman's hand a '6-TON grip and enabling her easily to do mechan- ical work difficult for a man using other tools! A SUPER PLIER-WRENCH-VISE WITH A 1-TOM POWER-GEAR The PlieRench out-speeds, out-works and out- wears, dozens of best other tools in an incomparably superior way. In '/ssecond the Ratchet Gear-shilt fits the Jaws to the work and the handles to the size of Your hand. The One-Ton POWER-GEAR auto- matically LOCKS and releases the grip on the Cor- ners and ‘flats’ of Any shape and in addition ap- plies % to 1 TON Direct pressure—64 to 128 TONS per square inch! It is a Perfect Ratchet Turning Wrench! OUTGRIPS A 40-POUND VISE! The force of the 1-TON PlieRench Grip is beyond belief—it must be experienced. It Out-grips a 40- LB. VISE; twists round heads off \-in. stove bolts and heads off 4-in. Bolts! It will easily, instantly, remove worn, chewed, and chiseled, nuts, broken taps, drills, studs, etc., in tightest places, with next- to-nothing to get hold of—when all other tools fail! Its smooth Jaws with 4-Way V-Grooves will hold a hair, and all possible shapes from 0° to 1%° diam- eter with a rigid. clinching grip that never chews or slips one bit. They coil 1/16* to 1° diameter springs of fine and heavy spring wire, and—do a thousand other “impossible” things quickly and easily. ALL TOOLS in a 24-Ounce KIT The PlieRench Kit is a Guaranteed, Time-per- fected, Super-quality Master Tool, having a Universal Utility that defies Imagination. “The PlieRench Way" Manual of Mechanics—64 Pages with 145 Pictures—shows most valuable uses and ad vantages! HUNDREDS OF THOUSANDS of men are using these wonder Kits to make their Homes and Estates more comfortable—Farms, Shops, etc., more profit- able: to get more and better service from Automobiles and all mechanical devices, with an enormous saving in money. time and energy! JUST TRY a PlieRench Kit once, and you would no more go baek to other tools than you would to the ancient Ox-cart!

Ltd. Special Introductory PRICE ONLY $3.75 Me Fe (Regular Price $5.00) SI»

r am soma ir Ae tte es dee be Cable PlieRench—each the Master in its field Y= ¢.* 2” ) amazing incomesdemonstrs rthis LS os £ wonderful new tool. One man alone ‘WrtH EACH KIT This $5.00, 1{4-Lb., Kit will do the YS ee - sold nearly 10.000 in Just one state \A VALUABLE BOOK work of 60 Lbs. of other tools cost- M4 Vv * # Fastest seller known. Factories buy ing $50.00—Quicker, better, easier, ,2°" £3 Fe oad , “ owner buys e have wonderful a bt Yikes $3 “ a special proposition to agents. Mail ~ $ Show on Coupon, Kits Wanted Us Ss i” A * “ coupon for full details. Why not on 2-Weeks’ MONEY - BACK 3% © °.° earn $75 to $200 and more a week, S OFFER— (7 Co . spare or full ne! ye , > °° ° ce meal MAIL TODAY, .““° '

ay SAVE $1.25 08 0% THEFLASHSALESCORPN BER KITT fee! vs . > Pe Orve LP-4809 N. Ashland Ave., CHICAGO, ILLINOIS yw

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They are Enthusiastic All three Eliminators received from you are the local stations tune very sharply and the You will be enthusiastic, too! ~

te Approved and passed by the rigid laboratory tests of Popular Radio and Radio News. only $1.00 to this coupon mail it promptly postman everything we say, price will be refunded.

POPULAR MECHANICS ADVERTISING SECTION Sensational Succ eCSS e Over 25,000 sold the /1xst O monisis

working well and the owners are entirely satis fied to say the least One is working on 60 s eycle current, another on direct current, and Overwhelming evidence that VALUI s quick to be recogr the other is on 25 cycle current in Windsor preciated Canada I am thoroughly convinced in your statement that they will operate on any light Tr ‘ » te ;} to th t “RK ing circuit or any frequency. J. G. Mullan Unsurpassed quality is built into the Townsend B’ Socket | Detroit. Mich with money saved by untfied production methods and lower me Z Wish to tell you I consider your FElimins ator the costs best piece of radio equipment I have eve bought I was surprised with the fine per- You get more—you pay far less—for the most rema ible va formance and construction. Ed Seager, Ham- toda. ilton, Ont., Canada stead I could scarcely wait to report to you the fine results of your Eliminator. Since receiving it New thousands of Radio set owners are learning this da b the house has been filled with fine clear music Townsend “B” Socket Power increase in volume is remarkable We never Sold « . 2 ( SATTIORTI want to use noisy B Batteries again. It is the . << on REAL Gl —— TEE OF M INE ¥ BAC iF NOT ATI best bargain I have struck and I wish to com- Delivers up to 100 volts on any set, on DD. ¢ any pliment you on this Eliminator Frederick tone, clarity and volume Lyon, Seattle, Wash Have been using your Eliminator since last vy fill out the pon a ‘ebruary and it certainly works fine. Fred A S d O d T d | a ee Peters, Dallas, Texas en rder oO ay i B to an enve I ype with only $1.00 a at once. Your Townsend ’ ‘Socket Power Unit will be s Deposit « mynly $5.85 = ml A. with the Try out for 10 days—then if it does not return it to us al

i purch ise 99 Townsend Laboratories 713 Townsend Street, Dept. 15 Chicago, Ill.

TOWNSEND LABORATORIES, 713 Townsend St., Dept. 15, Chicago, Gentlemen: Attached find $1.00 B” Socket Power Unit, C anteed 10-day free trial Til. Kindly send at once T O. D. for $5.85, plus postage Address City : eee State..

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OER EY HK + ee tea at ET A EE ORLA POPULAR MECHANICS ADVERTISING SECTION “Why-It's a Whole jp Machine Shop | XMAS GIFT —that is what Users call the EIFEL-FLASH Pilie- Rench KIT, because instead of using a dozen tools on One job they do a thousand jobs with the PlieRench KIT alone! Andifthis page could show “Mechanics” readers what this Kit can do for them, the Kits re- served for the Special Offer below would not last one day, but—space permits only ‘a word to the wise.” Helped Win WORLD FLIGHT USED BY U. 8. World Flyers; on U. 8. 8. Shenan- doah, 8. 8. Leviathan, U. 8S. Army, Navy, and Mail Pianes. By MAKERS of Buick, Chevrolet, Nash, Packard, Reo, Studebaker, etc., Automobiles: each with its employees buying from 200 to 1000 Kits Thousands of Housewives are using the PlieRench too, because it is the only tool giving a woman's hand 44-TON grip and enabling her easily to do mechan- ical work difficult for a man using other tools! A SUPER PLIER-WRENCH-VISE WITH A 1-TON POWER-GEAR The PlieRench out-speeds, out-works and out- wears, dozens of best other tools in an incomparably superior way. In '/ssecond the Ratchet Gear-shilt fits the Jaws to the work and the handles to the size of Your hand. The One-Ton POWER-GEAR auto- matically LOCKS and releases the grip on the Cor- ners and ‘flats’ of Any shape and in addition ap- plies % to 1 TON Direct pressure—64 to 128 TONS per square inch! It is a Perfect Ratchet Turning Wrench! OUTGRIPS A 40-POUND VISE! The force of the 1-TON PlieRench Grip is beyond belief —it must be experienced. It Out-grips a 40- LB. VISE; twists round heads off \4-in. stove bolts and heads off '4-in. Bolts! It will easily, instantly, remove worn, chewed, and chiseled, nuts, broken taps, drills, studs, etc., in tightest places, with next- to-nothing to get hold of—when all other tools fail! Its smooth Jaws with 4-Way V-Grooves will hold @ hair, and all possible shapes from 0° to 1° diam- eter with a rigid, clinching grip that never chews or slips one bit. They coil 1/16* to 1° diameter springs of fine and heavy spring wire, and—do a thousand other “impossible” things quickly and easily. ALL TOOLS in a 24-Ounce KIT The PlieRench Kit is a Guaranteed, Time-per- fected, Super-quality Master Tool, having a Universal Utility that defies Imagination. “The PlieRench Way" Manual of Mechanics—64 Pages with 145 Pictures—shows most valuable uses and ad vantages! HUNDREDS OF THOUSANDS of men are using these wonder Kits to make their Homes and Estates more comfortable—Farms, Shops, etc., more profit- able; to get more and better service from Automobiles and all mechanical devices, with an enormous saving in money. — and energy! JUST TRY a P jieRench Kit once, and you coun no more go back to other tools than you would to the ancient Ox-cart! Ltd. Special Introductory PRICE ONLY $3.75 (Regular Price $5.00) - The KIT has 3 Gear-Jaws In '/sSecond you Agents : $200 a Week convert the Universal PlieRench into the Pipe- §/7/ |: and-Fitting PlieRench, or into the Wire-Chain- * seRench repre sentatives earn Cable PlieRench—each the Master in its eld. .447 = amaving - ——— € oy = Tate 06.00, 104-8h.. Ke nmap " Ws -$ GCI eV Ol 1¢ Man alone Wrrn EACH s $5.00, -Lb., tw dot t sold nearly 10.000 in just one state A VALUABLE BOOK work of 60 Lbs. of other tools oe we ~ > Fastest seller known. Factories buy ing $50.00—Quicker, better, easier. ,&% Pe fe by hundreds. Every auto and home oe Y as owner buys. We have wonderful Gs MAKES WONDERFULGIFTS ,“" -° = & . special proposition to agents. Mail a Show on Coupon. Kits Wanted #// é coupon for full details. Why not on 2-Weeks’ MONEY - BACK _+” © earn $75 So S200 and more a week, \ eco OFFER— I spare or full time! ys MAIL TODAY, LP-4809 N. Ashland Ave. ea 04S 2 THEFLASHSALESCoRPN BER iat eo , CHICAGO, ILLINOIS

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200 POPULAR MECHANICS ADVERTISING SECTION At this price the Crosley Bandbox is Radio’s most astonishing success, not because the price is low, but because the set is magic! Millions are making up their minds today to buy a radio Millions will replace obsolet ts with new, up-to-dat receivers this fall Experiet 1 radio owners will look first for 3 fundamental point incl to r set they consider will addr t juestions 1. Isit lect E 2. Isit sen 4 3. Isit easy to operat Satisfied on these points they will look for: 1. Single dial control 2. Iluminated dial 3. Volume control 4. Single cable leads 5. Console installation adaptability. 6. Reasonable price Millions will look at the Crosley Band- box This amazing little set is now dis- played by more than 16,000 dealers The Crosley Bandbox is a 6-tube receiver he circuit of this set is of the excellence you would expect from a group of skilled en- gineers suddenly given the pick t the world’s radio patents to work with Crosley has always given the radio world its biggest value for its dollar Contem plate the perfection possible when the doors of the research and development labora- tories of The Radio Corporation of Amer- ica, The General Electric Co., The Westing house Co, The American Telephone & Telegraph Co., and the Hazeltine and Latour Corporations were thrown open Licensed under their patents! Simply it means that millions will possess the best radio performance possible at the low prices for which Crosley is already famous The Crosley Bandbox is totally and com- pletely shielded Every element is abso lutely separated from every other ele by solid shielding Coils are covered th copper. This could have been done cheaper but efficiency would have been sacrificed Condensers are housed in cadmium-plated steel All wiring is separated and shielded from all other parts of the receiver Solid, sturdy, substantial, the itire set is a > bled on a heavy metal chassis freq \ Wd) l 1 through use of the N tro- lyne principle I — ~~» a genuine Neutrodyne! To the initiated this means mucl I the layman it manifests itself n " n radio receiver that does not squeal t when you are trying to get a station The shielding makes the Bandbox hig g selective—the circuit itely nsitiv ind 1 u the design, extremely isy to operate rhe Bandbox is operated with a single tation selector (one dial When HISTORY is | in the making~ 6 Tube Crosicy BANDBOX 355. | — In nfost localities and in most owners’ 1ands the single station selector will find ull the programs anyone could possibly wish But there are some owners who demand greater ability like the possessors of 90 horse power motor cars who may never step on but like to be conscious it’s there For it ich have the Acuminators been designed vay stations of weak power but perhaps mu ire captured by the use of th auxiliary tuners. Their function is best » a pair of field glasses. As the len distant scene to nearby aspect. $ acuminators bring the remote station ils up to room filling volume Ordi ye dial radios can never perform lik this Hair line tracking of the condensers together lificult—but the acuminators \ secondary adjustments ezclusire to y give the Bandbox a substantial command of the air and all that is in it The dial of the Bandbox is illuminated For corners and dim eyesight it r ymmends itself Volum yntrol is necessary on good rad toda Nearby and high powered tation end terrific impulses into the re r Detuning has been a_ favorit 1 of ftening this loud reception but ions closer and closer together on lial detuning particularly in large cities creates an overlapping of programs I ear l the y is only good tor or ita tim Under the towers of the sta- tions t ume control of the Bandbox cuts t loudest blast down to a veritable wl per A single cable leads all outside and p r connections from the Bandbox The adaptability of the Bandbox stallation in all types of cabinets is ture The metal case of the Bandb off the chassis This leaves the grouped dial, switch and volume shatts to be stuck through holes in t of any sort of cabinet The escutcl quickly screwed over them and the installation is not only complete but earmarks of a makeshift Much has influenced the $55 price of Bandbox Back before radio became the ent ment torce it is today Powel Crosley held an ideal that the things which giv ple pleasure should be made to se prices so that millions may enjoy tl Throughout the country millions exa the Bandbox today 1ey see it the a ment of an organization who began it velopment when radio as we know it began Its success has been tremend clamorous demands from dealers ar indication. Even at any price it would sensation, for its performance rank the most expensive radio receiver market Hy j i HUI | | 1 ae aot q ae = $65 5 || & 4 $85 -_ i | _~ 3) $35 APPROVED CONSOLES “I want the public to hav : r value in consoles this year as I! given them in the Bandbox, uid P Crosley, Jr Prominent furnitur manutac thru their long experien pr beautiful cabinets at moderat Designs submitted were admired, tested, approved The Musicon builtin. Crosley dealers now sel Purchasers may know they ar suited for Crosley radio by lookir the ‘‘approved label” in each on Cr rs get these cabinet nly f y deal g h The H. T. Roberts Co., located at 1 S. Michigan Ave Chicago, Sales r sentative for The Showers Brother Bloomington, Ind., and the Wolf M facturing Industries, Kokomo nd Write Dept. 15 for descriptive literature. EROSEEYna THE CROSLEY RADIO CORP. Powel Crosley, Jr., Pre Cincinnati, OF Montana, Wyoming Radio POPULAR MECHANICS PRESS Crosley ts licer ed only for Amateur, Experimental and Broadcast Reception. Colorado, New Merico and West prices slightly higher.

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itart to Play Very First Day PARENTS! What greater gift can you confer on your chil- dren this year than life- long fun and entertain- ment? Love of music means love of home, an appre- ciation of the finer things in life. Here is a chance to give your boy or girl that love without the te- dious practice that most instruments require. The Xylorimba is easyto play. No teacher is needed. Practice is actually a joy. Remember, the Xylor- imba is the guaranteed product of a company established nearly half a century ago—a company that stands back of every promise it makes. oe eh. pho “sh wale "Tt Lp | . OEE: "THINK of the best Christmas gift you have ever received. Multiply the pleasure it gave you by ten, and still you have only an idea of the joy you can give yourself this Christmas if you act at once! Start to Play the Very First Day! Haven't you, like millions of others, envied the fellows who “bring down the house” with snappy xylophone or xylorimba numbers? Haven't you longed to create your own music, to be looked up to wherever you go, to be able to make real money in spare time? If you have, this ad spells O-p-p-o-r-t-u-n-i-t-y. The xylor- imba—wonderful for home,indemand at dances and gatherings— is nevertheless the easiest of all instruments to play. In fact, on the very day you get yours you play simple melodies, even if you can’t read a note of music right now. In afew weeks you astonish your friends and fam- ily. All your life you have the joy that comes to those who can entertain. Plays 20 Minutes; Gets $20! Ralph Smith, Chicago, played twenty minutes at wedding; his “pay” was $20. Altho only 12, Turk McBee, Jr., pl: iys big-time vaudev ille ex- clusively. Harry Breu- er, New York, has om a “ y eo tt ws i} -% made thousands of friends thru his xylophone selections on the radio, L.E.Hallman, Reading, Pa.,writes: “Made $300in 5 weeks—spare time.” And now J.C. Deagan, Inc., (world’s largest manufacturer of xylophonic instruments) has made it so easy to own a xylorimba that noth- ing stands in your way. Sizes and styles to fit every age and pocketbook. A five-day free trial that eliminates risk. Free, easy lessons that make teacher tnnecessary—and, best of all, such easy paymentsthat theyare hardlv noticed. Will You Investigate? Everyone wants to be popular. Everyone wants to make extra money. Everyone wants to be center of attraction at gatherings. But these ad- vantages don’t come by themselves. Oppor- tunities must beseized. This is youroppor- tunity — will you pass it up without in- vestigation? The accompanying cou- ,@ pon will bring our big FREE book o to your door. It tells all about .@ the Deagan line, the free trial, the easy payments. Remem- .¢ ber, no cost or obligation! 4% Simply fill in and mail the coupon — but do it before it slips your mind. Today is y as good a day as any. Do a -_ Ak NOW! Xe

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\ cAnd Now A MACHINE To Make Shaving 507 Easie and 100% Cheaper/ Unique Invention Arouses a Whirlwind of National Interest! ‘ Achieves Amazing Records of Unbelievably KEEN, Cool Shaves , | Special Introductory Offer in Force Right Now! mes: ee ~MAKES ONE BLADE LAST 365 DAYS HIS is the age of amazing scientific discoveries. And now comes the most surprising invention of all;— a machine that absolutely revolutionizes shaving! Just think of a device that can take any ordinary razor blade on the market and multiply its sharpness 50°, to 100°) in exactly 11 seconds! And just imagine what a slick, painless shave you can get when your blade is just about twice as keen as any you have ever tried before! No More Blades to Buy But that isn’t all. KRISS-KROSS not only strops blades to unbelievable sharp- ness—but it makes them last almost indefinitely! Day after day—week after week—you can keep using the same oid blade and still get smoother, better shaves than you now get from a blade right out of a fresh package! Any number of cases are on record where one blade has lasted over a year and is still going strong. And M. T. Main of Kenosha, Wisconsin, has used one single blade for more than five solid years of the coolest shaves he ever got in his life! Works on all brands of blades except Dur- ham. MReproduces the magic diagonal stropping-stroke of the master barber. Re- verses blade automatically, first one side and then the other. Starts with strong pressure and finishes light. Nickel jig flies up to notify you when blade is ready with the keenest cutting edge steel can take! Generous Introductory Offer KRISS-KROSS is never sold in stores but only through authorized representa tives in each locality. Right now, we are making a generous offer and are giving a new kind of 3-way, adjustable razor FREE to introduce KRISS-KROSS. Use the coupon below to get details of this un- usual invention and offer. See for your- self how ingenious KRISS-KROSS is and what undreamed of shaving comfort it holds in store for you. No obligation. Clip the coupon now. Mail it to-day! Ag ‘t $30 a Jay » KRISS-KROSS is an as ishing money maker brings excellent profi men who are willing to « our represe’ tatives in 4 home territories. Many $30—$60 a day and on are making $5000and $% a year clear profit. Sw time agents often take —$12 an evening and » $200 a month. We giv an extremely generous f Osition and show you how to get started the e way. Write for informa and see just exactly wha offer. It will pay you vestigate. Check bot line of coupon below mail it to-day! gio” KRISS KROS:! RHODES MFG. CO., Dept. W-372 1418 Pendleton Ave. ST. LOUIS, MO. Rejuvenates All Makes of Razor Blades KRISS-KROSS is so re- markable that it is more a blade-rejuvenator than a stropper. It embodies 7 mechanical features that ideal Wonderful Xmas Gift! KRISS-KROSS makes a novel and g illustrated explanation show::g -how fF vnique Xmas gift that will be re- membered for years to come. At- tractively boxed in holly wrapper for holiday season. remembrance for houses to give employees or special customers. Without present Name Inexpensive. Also business Address Town “ao have long baffled inventors. ! STROPPE i Rhodes Mfg. Co., Dey*t. W-372, 1418 Pendleton Ave., St. Louis, Mo. obligation phase send rejuvenates all types of razor biades (@ Also give me details of your special int and the Free 3-way razor you ua State

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Jus OSS is ana ey maker llent profi willing to tative in ries. Many day and oO 5000 and $% profit. 5S often take *ning and h. We giv generous ft show you arted the e for inform »xactly wh | pay you heck bot on