Popular Mechanics 1923-06: Vol 39 Iss 6

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i cAL ROOM MAY PS ; ME Peat. LIBRARY 18 1923 25 Cents POPULAR MECHANICS MAGAZINE WITH WHICH IS INCORPORATED THE ILLUSTRATED WORLD WRIT N SO YOU CAN UNDERSTAND IT tC PAGE 851

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= ranteed mee aoa ar Gi FREE ,,2°-Piece, Kitchen Se Om Wonderful 32-Piece Aluminum Set consists of 2 Bread Pans; Doughnut Cutter; 2 Loose Bottom Jelly Cake Pans; Combination Tea- kettle and Rice Boiler with lid; Saucepan Set with lid; Dipper; Colander; Measuring Cup; Percolator; 2 Pie Pans;Complete Castor Set; Tea or Coffee Strainer; Fry Pan; alsocooker setof 5 pieces—makes 11 utensil combina- tions: Preserving Kettle; Convex Kettle; Combination Cooker; Casserole; Pudding Pan; Tubed Cake Pan; Colander; Roaster; Corn Popper; Steamer Set; Double Boiler. No Money Down! Just mail the coupon and we send y 32-piece Aluminum ARG Cooking Set, and the 10-piece Kitchen Set Free. When RE s FREE GIFTS the goods arrive, pay only $2.00 on the Aluminum ’ Set. Nothing for the Kitchen Set—it is FREE. Use | This great 368-page book offers the both sets 30 days, and if not satisfied send them back | W0r!d’s greatest bargainsin home 10-Piece and we will refund your money and pay transporta- oe ne phe gy - 4 = —_ Kitch Set tion both ways. If you keep them, pay for the monthly payment terms and 30 _ cree e i Aluminum Set, only a little every month, days’ free trial on everything. oumerctcteeet| Complete 32-Piece Aluminum Set | Wonderful Gifts aeaiately Gatalogexpieleshow ecanest ° assware monade ts, Eatete ee and FREE Kitchen Set Silverware,Tablecloths,Nap- Measuring Spoon| Hartman’s special, selected set of heavy gauge | Sinafecitteme Oe 368-Page Boot FREE Ice Pick Aluminum Ware—a complete cooking outfit, light to “Let Hartman F Eee and CreamBeater| handle, easy to clean, always bright as silver. Will _ aa ams ee ee at Can Opener never chip, crack or rust. We guarantee it for life. fecotable & Pan Brosh 32 utensils—everything for baking, boiling, roast- ing, frying. And—absolutely free—a Combination Ex and Ca Cake Turner} Kitchen Set, 10 utensils with pretty white handles. siertue «| Mead P aimee! Nearly a Year to Pay panece y kg You pay only $2.00 and postage on arrival (on the oo an at hand.| Aluminum Set— not a penny to pay at any time on the Kitchen Set). The balance a little every month. Order by No. 417EMAT7. Price for Aluminum Set, $17.95. No money down. $2 and postage on arrival. Balance $2 monthly. 10-Pc.KitchenSetis Free. § Occupation R. F. D., Box No. ‘twee - HARTMAN caretcos| cn. s Ca rpet Co. | fit your shipping pointis different from y« ——— » 923 line below Dept. 5516 Georriaes, Set. OF CHICAGO, ILLINOIS © send shipment to. ; HARTMA FURNITU 7 CARPET co. Dept.55 Cinicago, Ill. Send the Sepiese, complete Aluminum Cooking Set N 417EMA7 and 10-piece Kitchen Set. Will pay $2 and post- | age on the Aluminum Set on arrival. Kitchen set is free. lam to have 30 days’ free trial. If not satisfied, | wil! st both sets back. If I keep them, I will pay you $2 month until the price of the Aluminum Set, $17.95, is paid. Title | remains with you until final payme nt is made. Name .._._. a

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,_ ie

Popular Mechanics Magazine TEGISTERED IN U. S. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT

Vol. 39 JU NE, 1923

No. ll @ |

Spirit Pictures and a Speaking Skull Remarkable Demonstration in Broad Daylight before the Editors of This Magazine By J. L. PEABODY FE RY one who believes in spiritistic enomena, as well as those who are penly skeptical, cannot fail to be in- terested in the “spirit pictures” made by jesuit priest, Father de Heredia. suits, as is commonly known, igently for at least 13 years, take ee vows of poverty, chastity, and and then follow

how it was done. equipment, Using the magazine's including camera, plates, and chemicals, numerous “spirit” views were produced, even to the white cloud ot “ectoplasm” commonly associated with them. To guard against plates being shifted they were signed by persons present and

some partic- Father de Heredia himself sat for some line of of the. views idvy to which ——— — SSS SESE tee ae SS while the mag- rest of i azine’s oper- their lives is ator made voted \| the exposures ete 4S e Illustrated World, a maga- il - The reswits ven the | zine long and favorably known, were as grati ] 74 m | = oacan ) th . i has been mer ed with Popular aoeteacat many fields, Mechanics. inning with this exhibited by and literature issue, Illustrated World subscribers Sir Arthur 3 . . > : ovle— - pi will receive this magazine each ee ees f these month until their subscription de Heredia did le-pur- i expires. Those who have been it all by trick- a - subscribers to both will have their ety excel Cts ae - ° yiVy eX S==—SSSSS=S=—-$SS= with some lu-

with the {a scientist as with the uncompli- logic of a boy, for that is the way, he to strip spiritism of the frauds com- I vy practiced in its name. He demon- strated recently in the Popular Mechanics graphic studio how spirit pictures could be made under “test” conditions so that the closest observer could not say minous paint and had laid down, temporarily, an object coated with that substance. Upon pick- ing it up, he observed that there remained a faint photographic impression upon a sheet of paper on which the object had rested. This led him to try to transfer a picture directly to a plate by first coating the picture with paint and then laying it x17

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S18 POPULAR upon the sensitized surface. Resuits were obtained with amazing simplicity. Any picture could be transferred to an unex- posed plate without affecting its appear- ance sufficiently for detection, and the plate could then be placed in the camera and exposed in the usual manner. The result when printed was a sharp impres- sion of the person sitting for his: portrait with an etherealized presence, or pres- ences—according to the treated copy used —floating in a gauzy cloud near the sub- ject, or even, transparently, across his face. When a boy, Father de Heredia had studied magic under the renowned Herr- MECHANICS picture—resting lightly on one corne; rhe plate is then = in the camera } the subject himseli, who may even pres the bulb. The sitter is eager. He insis | on developing and printing the plate iy mediately. His eagerness increases. T| print is still wet, but tiere—unmistal | ably—is not only his own likeness, py; that of the aged mother for whom ; normal person ever ceases to year Fortunate, indeed, for the subject, that the picture was made by the good Jesyj priest, who willingly explains how | did it. Many and devious are the ways mann. The the fraudulent boy’s father cabinet me was wealthy dium, accor and main- ing to Fath tained a pri- vate theater for his_ sons. Here Herr- mann had given a performance which so de- lighted the young Mex- icans that they begged to be taught the se- crets of the pro- fession. This boyish delight in clever tricks has sea- soned the priest’s person- ality and kept him very hu- man. Magic and science are the allies which enable him to de Heredia man may S mairile chest, but what is t to prevent | from wearin: Wig o1 ; chest? Unde such a wig 1 be conceal clouds of titious ect plasm. An e> ing con is pra¢ ly alway strain delicacy making ough e tion et dium. W the med make spirit pictures under test conditions. Che priest clips his “ghosts”—a beauti- ful child, a gliding figure, a line of march- ing soldiers, an aged woman—from for- eign periodicals. He always has a supply vith their surfaces washed with luminous paint and freshly exposed to the light. A sitter enters the studio. Perhaps fearing fraud he has brought his own plates and chemicals—or his own camera even. He examines everything relating to his mis- sion. The good father refuses to use the plates until the subject has written his name on them ‘to insure that no shifting can be done. Father de Heredia watches him sign the plate, his own hand—in the, palm of which is the paint-treated spirit Professor Freud (Joseffy) and Father de Heredia, Quite Uncon- a scious of the Benign “‘Spirit’’ womial must h chaperot according to the priest, any man s! is helpless when opposed by two women. Let us pass, however, from the d strations of the Jesuit to a Cor pillared hall where are gathered s: score of people, every one of whor suffered a bereavement that has left groping through the hard facts of 1 into the shadows of the unseen. had time we could read a story each of these faces. An old man low rostrum at the front is annou: such hymns as “Lead, Kindly Light “When We Gather at the River.” A group of men at the front Bending over Them

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m Over ts’’ Haunt This View of Father Kane of Loyola University and Father de Heredia. They Are Both ‘Luminous-Paint” Spirits, Evoked by the Jesuit Scientist in the Popular Mechanics Studio gy up a which ve care- imined. edium ;in the f the ining ne of n; she nm ap- a coat itt bor- lfrom s in the e. The id lights out one * The 1 now is midark- so that ope-faced at the o looks a death k in the strum one Father de Heredia, and H. H. Windsor, Editor of Popular li g ht Mechanics: The Third “Person’’ Is the Ghost r] 1 N gieams. Noone quite knows when it was SW itched but there it i like a spiritua eye to oppress any who may doubt. Che medium stumbles out of the anteroom into the cab- inet, the wom- en’s committee files silently in- to the room. The old-man leader has in- structed every one on the front seats to clasp the hand of his neighbor on the left and right. Why do some of these people grip one’s hand so hard ? 819

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520 POPULAR Suddenly a voice—a gruff, loud voice— from the cabinet! It is Pedro, the me- dium’s control. “Watch for Balsamo who lived from 1743 to 1795.” The curtains part, they are swayed by a filmy gust. Heavens! what is this? It is not the usual spiritual figure, but a skull that emerges. <A _ horrid grinning human skull. Pedro speaks again. “Bal- samo wil ll an MECHANICS “Click! click! click!” answers tl but where is it? It has disappeared, and the me staggering out into the arms of the ing committee. Such a seance is quite possib! Balsamo, the mechanical skull, to f the hands of unscrupulous person the invention of Freud, wise k1 Professor

swer questions Three raps will mean ‘yes’ and two ‘no.’ Is that right, Balsamo ?” The skull opens its grin- ning jaws and clicks its teeth together sharp- ly three times —meaning es.” The peo- are leaning vard breath- ssly. raps “Balsamo, about you’’—the skull slowly turns from left to right, from right to left— “and see if you know anyone present.” “ei bie ick!’’ re- ] look

J oseffy, t gician On the day th ther de dia she assemble tors of | Mecha Magazi1 to fake picture seffy ex Balsam has named Spanisl cian wil in 1795 samo visible nism of kind. Th 1S pivoted small cit base and three-in« of ch around

sponds Bal- samo—he rec- ognizes no one. ‘To prove that understands what is said to him, will some one cl “Balsamo, Left, and the Jesuit Balsamo woaose two figures from the chart on the rostrum and Balsamo will add them together.” The chart has all the figures from 1 to 9 and some one chooses 5 and 8 thing The grue responds with 13 clicks, and a great sigh the spectators. some 1 here \ oO t would li questions °”’ calls Pedro The women shrink back, but a graving man calls out: “Have you ever seen John Patterson on the other side?” “Click! click! click!” Balsamo, turning his hollow eyes upon the speaker, who trembles visibly. “Can you take a message to him?” “Click! click! click!” “Tell him’—with a big knows he was not a coward.” “Is there anyone to ask Balsamo Le answers sob—‘ Dad the Talking Skull, with Its Inventor, Joseffy, at the ° Father It was from h hand: were no connections between it control — Joseffy. It then upon a pedestal and not only g performance described, but did other things. The skull turned either to left is it was directed. Joseffy asked t] a spectator took out his watch exactly 2:06 p. m. “Click! cl swered the skull; a pause and more clicks in rapid succession Every one responds to magic There were more tricks Min ing: answers from beyond to que “Thought transference?” que one hesitatingly “Thought transference?” chuckle ther de Heredia; “no, just a trick will not tell you how it ees done a great secret. Ha! Ha!” “Ectopifile!” laughs Joseffy, the de Heredia, at the Right was

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POPULAR MECHANICS 821 (MS OF SHIPWRECK MAY GERMS TRAPPED BY AIRPLANE \LK OCEAN TO SAFETY FIGHTING WHEAT RUST man life-saving device with Seeking to find the source of the germs ipwreck victims may “walk” to of “black stem rust,” a disease of wheat, being offered steamship com- an airplane has been used within the last It consists of two pontoons that year to test the air above the fields. It and forth alternately in a rigid was not known whether the rust germs e operator placing a foot in each were carried to the wheat-raising state ling from the o f . ° : , South by the and wind or the whether the sofa barberry, a shrub of rapid growth quite common in pad- ee the wheat 1 the belts, aid de- s the are Sery ed as a breeding place for them. Glass plates, coated \\ ith amu cous sub Stance, were mounted on the wings of the airplane, whichthen flew over in- fected fields at heights vary ing from 1,000 to 7,000 feet Che plates were ex posed to the air for different pe riods of ) and the re- sults led to the conclusion that the germs ere sheltered by the bar berry rather b1 COPYRIGHT, UNDERWOOD & UNDERWOOE : 1, Victim of Shipwreck Operating New Life-Saving Device: South by a Paddles on Bottom of Pontoons Aid ‘‘Walker”’ currents In ned for one instance trathe during May This new 6,800 spores were caught on a glass plate y cuts the province of North exposed for 65 minutes. It was also lengthwise into two almost equal learned that the spores would germinate ves the industrial town of Tilburg at heights of as much as 7,000 feet above to the sea, and makes possible in- the ground munication between this town and — iportant Dutch cities, Maastricht @An exceptionally dry winter has so josch. Its length is approximately weakened Japan’s electric power, through es, its depth about 8 feet, and its the drying up or lowering of the level ot e width 71 feet. About $10,000,000 streams and lakes, that steam plants are en spent on the project being installed to help out.

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Light al uivalent Is as Is E It upying our new building and issu- the first copies from it, we have of Which " - ed - 4 “a POPULAR MECHANICS’ NEW HOME By H. H. WINDSOR “written so you can understand it’; the “you” meaning everybody in all professions, industries, and occupations. The first copies contained 16 pages in language a oe some of our readers would be 5s- ed in a few words as to how the Se cazine was originated o development. mon e first copy of Pop- 2: lechanics was is- Se: inuary, 1902, from all room, by its and present edi- he idea had been eloping in his mind years, suggested ing a large num- other technical lass publications publishing some of v 1. He realized the % us number of ar- f a highly inter- nd instructive er, including echanics, engi- Feet, i RB Oo. os ° °o Mean H Sci- } | | } | | | - dl eering, industry, and ry, which were 9 $e pressed in technical : , Office of that the layman uld not understand, mited to the comparatively small tion of such publications in those “o. 322 e Popular Mechanics idea was to se- t i s information at first hand and liest possible moment, and con- ell the story of these events in H. H. Windsor, Magazine, on the Day of the Formal Opening Editor and Founder of Popular Mechanics the form of a weekly, which two years later was changed to its present monthkly- magazine size. From the first it was liber- ally illustrated, although at that time few publications indulged in many pictures A long-time policy is an absolute in- dependence of the editorial and advertis ing departments. Readers w ~ Zs the with *rinted in the Machine m 1.000 « . t 7 L than of frequentiy inquire why the name of the inventor or manufacturer of some- thing described is almost never printed. It is to avoid even the appear- ance of advertising inthe editorial pages. This first small room, however, was soon out- grown, and from that day to this, the space re- quired in which to pro- duce the magazine has been steadily increased, until its present seven- story home became nec- essary in order to prop- erly produce the publica- tion. The Popular Mechan- View s Day More 0 ning Day: The Office of the Vice-President, H. H. Windsor, Jr., Also Taken on the The Eastern End of the Room is Seen in. This View ics building occupies 85 by 120 feet, on a lot 120 823

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824 POPULAR MECHANICS by 165 feet located on the northeast cor- The third floor is occupied by ner of Ontario and St. Clair streets, Chi- vertising, subscription, and mailin cago. It is devoted exclusively to our partments. The general reception offices and printing plant. is also located on this floor. The basement of the building is used as The fourth floor comprises the g a storage space for paper and provides administration, book, and cashier's de; room for 2,000,000 pounds. ments. There is also a museum wl de rapidly becoming of . [ ; siderable interes permanent, fireproof r ing place for what been, in most cases, « ished family heirk These are mounte, the walls or display: show cases, each accompanied by a « bearing the name of t |} donor, with a brief cd: | scription of its histo: The public is invited inspect the museu: any time during busine hours. The fifth floor is voted to the edit« department, the bure of information, and t ; library. The bureau : == ——J information gladly A Corner of the Museum Floor of the New Building: The Collection Has ‘SWErS any inquiries rr Many Exhibits of Rare Interest garding articles in tl! magazine, as well as The first floor is used as a pressroom _ nishes any other information in its powe: and was built especially for that purpose. with absolutely no charge. The edit The height from floor to ceiling is 15 feet, department is so laid out that « which allows ample space over the presses. writer has a room to himself. The presses used are rotaries Our art department on the sixth The second floor contains the bindery in its arrangement and equipment where the magazine is assembled after among the finest in this country printing, the book stitched, and the cover photographic branch being particu glued on. This is done entirely by ma- complete. Something over 75,000 illu chinery. tions have appeared in our pages since North Bay West Bay of the Art Department on the Sixth Floor, as Seen from the Art Director’s Office

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POPULAR MECHANICS st copy of the magazine was published. building is fireproof throughout, ne constructed of brick, steel, concrete, e. It was completed in 10 months, rshall & Fox, the architects and At the formal opening recently, 700 guests inspected all depart- the policy of the magazine not to e in special editions, nor to an- nounce forthcoming features. Our effort is to try to do each month at least a little better than the one before; it should be no violation: of policy to say we hope to at least live up to this endeavor. When in Chicago, our readers will find a warm welcome, and a guide to take them through all departments of the making of a magazine, should they honor us witha call. CROCKER ECLIPSE PICTURES SHOW SUN STREAMERS _ as - At The Huge Camera Erected in he Wilds of Austra- y the Crocker lition for Pho- graphing the e of the Sun rst photo- s of the eclipse September, ined by the icker ex- lition to il, West ralia, were ntly shown public. The tures were en with a 1)-foot camera furnish evidence’ that Einstein’s pre- dictions were rect. These Left: Total Eclipse of the Sun as Seen by the 40-Foot Camera he Corona Is the Band of Light Seen About the Dark Circle phot Prapl show the sun corona to have been 40,000 miles wide, from which long streamers of light hot forth one exX- tending 2,500 000 miles tro1 the sun cel ter. Morethan 30 stars were recognized 01 the camera plates and 23 of these were measured.

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NEW METHOD OF PURIFYING HELIUM PROVIDES AID FOR “ZR-1” BY JOHN W. KEAN Meg age vor of the Bureau of Mines have devised a new method of puri- fying helium which will be a great aid to the safe and economical operation of the “ZR-1,” the navy’s new American-built rigid dirigible. In this new charcoal-adsorption method, as worked out by Doctor Moore, of the Bureau of Mines, impure helium is passed through a bed of coconut charcoal main- tained at a temperature of approximately 312° below zero Fahrenheit. In passing through the cold charcoal, all of the im- purities, which are principally oxygen and nitrogen, are adsorbed, and the helium that is drawn off from the apparatus is within .1 per cent of perfect purity. The removal of the impurities is an interesting engi- neering and chem- ical process which is made possible by the adoption of liquid air for the re- frigerating medium. If liquid air is held in an open con- tainer, it will boil quite vigorously and the vapor pro- duced thereby is practically at the same low temper- ature as the liquid. In the process as developed by the Bureau or Mines, this cold vapor is needed to cool the incoming impure helium and also to cool the coconut charcoal and its container. With the char- coal and the incoming impure helium at the temperature of liquid air, or there- abouts, the helium is caused to pass up through the charcoal bed under a pressure of about 15 pounds to the square inch, and under these conditions, the charcoal has the property of removing and holding all of the impurities and allows the pure helium to pass off through the apparatus. On warming up the charcoal cells, this adsorbed nitrogen and oxygen is driven off, and the cell is ready to be cooled down for another purification run. By means of a number of these cells, properly connected, the process is made a continu- ous one. 826 Interior of Power Car ot Railroad Unit Equipped by Bureau of Mines for the Purification of Helium Helium in balloons or dirigib) slowly contaminated by the diffusio: air into the envelope, and purificatio: intervals, depending upon the natur the airship, is necessary as a measu: economy and also to conserve the su; At present the government plant Ft. Worth, Tex., is extracting a! 450,000 cubic feet of helium per n from the natural-gas wells in that vici at a cost of approximately $80 per cubic feet. After the helium has used for inflating a gas bag and has come mixed with oxygen and nitrogen other impurities, it can be restored to original condition at a cost of app: mately $1 per 1,000 cubic feet. In construc and preparing the flights oi “ZR-1,” the n engineers are ing every pre tion for safe While the Bu: of Mines has working on the | lium problem National Advi Committee Aeronautics been checking plans for the ship. These precaut have been ta because it is [1 realized that ar cident to the “Z will be a very vere setback to | ther constru: of this type ot craft. Owing to the tragic accidents have happened to the big airships chased abroad, there is a feeling of trust among people for this type. The accidents to the ships purch abroad have been due to faulty const: tion und the use of hydrogea as the flating element. From the day the | draftsman put pencil to paper, the n engineers determined that no accid: would happen to the “ZR-1” from eit of these causes. The big ship is nearing completion at Lakehurst, N. J., and is expected to make its first flight early in July. It is 680 feet long—125 feet longer than the Washingt monument is tall. The greatest diame'

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POPULAR MECHANICS 827 / feet, and the gas capacity is 2,100,000 feet. This gas will be held in 20 rate gas cells or bags. A _ skeleton ework of an aluminum composition es these bags. They are lined with beater’s skin Artist's Sketch, Showing the Nearly Completed Airship ““ZR-1’’ Making a Landing at the Naval Air Station at Lakehurst, New Jersey AIR PHOTOS MADE OBLIQUELY IN CANADIAN SURVEY In order to save time in covering the great distances of Canada, new methods under ordinary litions, are gas- : tight. Along the | of the ship are uarters for the and tanks for e water ballast the gasoline. ix engines of 300 epower each, in separate cars ung beneath the p, will furnish motive power. ese engines have en given continu speed tests of ht hours’ dura- and are sched- d to drive the ship at a speed of aerial photog raphy have been adopted in making recent surveys. The photograph- ing is done straight ahead from the of the ma- chine, pictures be- ing taken to the right, left, or to the front as desired An advantage of this method is that it allows an area up to fifteen square miles to be shown on each pic ture, instead of only an area ot three-quarters of a square mile as for- nose 60 miles per ur. The plans call r a continuous cht of 50 hours, hich would take the ship across the nited States or across the Atlantic. The “R-1” will be closely observed and han- ed with diplomacy before being called on to make any spectacular flights. Giant Dirigible, the Lakehurst Naval Station: e | Looking through the Keel of the Partly Finished i “ZR-1,” to the Right and Left of the Keel merly. The adop- tion of this method followed a demand for more exact in- formation regarding the Mackenzie River region arising since oil was discovered at Fort Norman. The work of surveying Canada has gone on slowly since the early French settlement. the Gasoline Tanks being Built at Note the

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828 POPULAR SURFACING MACHINE USES ABRASIVE BELTS Interesting features of construction are embodied in an improved type of sand- ing and grinding machine in- Surfacing Machine with Abrading Belt in Vertical and in Hori- zontal Positions = tended for small wood or metal parts. The grinding surface is an abrasive belt, easily adjustable and replaceable, which can be pivoted about its lower roller shaft and set in any position between vertical and horizontal limits. A station- ary dust hood and a removable guard add to the safety of the unit. The working table, 9 by 16 inches, can be tilted up as high as 15°, and down to an angle of 45°, making it adaptable for work where faces of the material are not square with each other. The table is at a convenient height from the floor, permitting work to be handled with ease. Left: A Mass of Tangled Wire being Drawn to the Machine for Bundling. Right: Close-Up of the Bundlins Machine. Insert: A Bundle of Scrap after Leaving the LECHANICS FRENCH HAVE NEW SYSTEM OF TENNIS SCORING In view of the fact that the presen method of scoring in the game of te: is quite clumsy, especially in match to naments, the French have devised a n system, the principal object of which is ¢ end long-drawn-out contests. Instead of requiring six games to win a set, t French would have the set go to player who first won nine games, w! deuce sets—those in which neither player scores—would be done away with. Fu: ther, matches should be the best two three instead of the best three of fi sets. In this way no match could con of more than 51 games. BUNDLING MACHINE MAKES SCRAP-METAL BALES Circular bundles of scrap are made a machine that has novel construct features. The scrap metal, which 1 consist of tangled wire, bed springs, tu ing, or similar material, is wound aro a revolving mandrel. As the bundle formed, pressure is applied on its out surface, but the full power of the mac! five horsepower, is required for only a { minutes, when the bundle is within 1 ir of the full size. Rotating disks at ends of the mandrel absorb much of t wear that would otherwise tall on frame. A winch is provided on the |! dier, to haul the scrap trom deliv: wagons to the front of the machine. chine

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POPULAR MECHANICS Views of the Interior of “Old No. 9,” the First Sleeping Car: That at the Left Shows Its Daytime Guise; While at the Right It Appears with Berths Partly Made Up FIRST “PULLMAN” CAR FEATURED IN MOVIES connection with an office survey of growth of a sleeping-car concern and great advancement made in the con- uction of its coaches, a moving-picture has recently been completed. For e purpose, the sections were A great deal of subdivided by curtains adverse comment was made at the time because of the narrow ness of the aisle, which made it dificult for the women, who then wore hoo Old No. 9,” original r, which de its first ip on Sept. 1859, from looming- n, £5, ¢¢ icago, was tured, anda tory, built out the early iblic attitude ward the in- vation, was ncocted, em- oying the ervicesofa umber of ac- irs. The old ir carried a gn requesting issengers to “Please Remove Boots be- re Retiring”; seats were not cushioned; he berths were pulled down into posi- ] tion by means of ropes and pulleys; heat vas scantily supplied by a wood-burning tove, and illumination was by candles. \t night the seats and backs were ad- usted so as to form one long bed, and Railroad Travel in 1859 Was Not an Unmixed Blessing; Witncss This Picture of the First Sleeping Car oped, the doors directly onto the platform theless termed the skirts, to nego- tiate its length Similarly, t he men c om plained be cause the prev alent “stove pipe’ hat was frequently knocked off by the suspended lights and the low ceiling, which latter was covered with oilclot The uncush ioned seats were reve! a ea not yet having been devel- at either end opened It was never “Palace Car,” although } ule i¢ “Sleeping Car” was the name appearing on the outside. On its initial trip the “Old No. 9” carried only five passengers and was in charge of Conductor J. L Barnes, who died recently.

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WHAT GOES UP—COMES DOWN By FRANCIS W. WILSON F you stood looking at a substantial brick building about 150 feet distant, ind as you looked the brick walls, win- lows, and roof dissolved—in a_ split- second—into a cloud of way between the power house and ¢ office building. Half of its 30-inch leng projected through the 4-inch-thick o platform of the car. The pipe landed a; dust and smoke which shot skyward, you would probably “regis- ter” surprise of a de- gree that would delight even the most exacting notion-picture director. The building, as I first viewed it from a window of the drafting room, housed two quite S 2-INCH IRON PIPE proximately 75 fe from the site of the « plosion. It might have ascended to a great height, or perhaps w projected almost hori zontally. In either case it struck the car with tremendous force: otherwise it could not have cut a clean core substantial boilers. One of these “blew up” as I looked. When the patter and smash of falling things had ceased, I noticed the remark- ible clearness of the window glass in front of me. I put out a hand—there was no glass! The force of Sketch Showing through Four-Inch How Iron Pipe Cut Seasoned oak from t Oak Floor of Flat Car floor. I measured its clination, which proved to be about from the horizontal. If it fell fro great height and struck the car at angle, how could it punch a hole thro the floor? Falling f: the explosion, acting iway from the office building, had created a vacuum that sucked out every pane of glass on the side of the build- ing I wasin. Powerful a height, its descet would have been alm vertical, since it lands so near its Starti! point. In that event t result would have b« to simply scoop out as this suction must have been, I had felt no dent in the floor if landed at an angle effect from it, though I stood within 3 feet of If it fell with a rota: motion, the punch: i window. During the noon hour the bridge shop was de- serted, and therefore, there was but one ‘asualty. The fireman was alone in the power house, and not a remnant of his body could be found after the disaster. The twin boilers had If the Pipe had Fall would have Bee en Vertically, the Efec: 0le could not possib n as Shown Above have been neatly cut but would have be-« more or less torn in the direction of t plane of rotation. If the piece of pi; were shot from the power house in approximately horizontal direction, a1 with sufficient force been bedded in brick masonry, and the ter- rain exposed to the full force of the explosion suffered a bombard- ment from bricks and bits ef iron. Scattered about within this area were frame cottages. Fourteen bricks tore through one such house, punch through the « floor, its trajector would have been almost flat in the short di tance traveled, and con tact with the floor ot the car could not have stopped its flight. I have never arrived at a satisfactory solu tion of this odd prob but did not injure a woman and girl who were in it. The oddest freak of all, from a mechan- ical point of view, was afforded by a piece of iron pipe which landed on an empty flat car that stood in the shop yard, half- 830 Traveling with a Rotary Motion, the Pipe would have Made a Hole Similar to This lem. For a number o! years I kept the core oi wood which was re moved from the interior of the pipe. The sheared edges were clean-cut and smooth Fortunately nothing feil on the roof of the building in which I stood.

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POPULAR MECHANICS 831 STRIKING ELECTRICAL EFFECT ON HIGH-VOLTAGE LINE sleet-covered appearance of the wires in the picture is due to an electrical phenomenon known as the E z rona effect, which is one of the factors that work against the use of higher voltages in the transmission f tric power. The line illustrated carries 600,000 volts, and was built for studying this effect and the It was necessary to use transformers of special design in the production of this g of the conductors. rely high voltage, and, similarly, insulators of special design in the construction of the line LEAKING SEWER WRECKS CITY STREET of unusual proportions occurred recently in Philadelphia, letting down half a block of city and almost wrecking the rows of houses on either side. It was an old 14-foot brick sewer that the morning following a heavy storm. It is believed that the excessive flow of storm water increased its defective condition, so that the resulting leakage washed away ge quantities of surrounding material and left the pavement slab unsupported. The noise of the cracking the slab before it collapsed averted possible loss of life, warning, as it did, a number of boys who were playing in the street. CAVE-IN street, broke down, the collapse taking place on

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DEEP-SEA SALVAGING CAISSONS TESTEMECCES a eh WHILE the idea of raising sunken vessels from the floor of the sea by means of devices embodying th attached to—few, if any, have proved of sufficient practical value in actual operation to warrant sunken ship, since divers cannot work or even live under the great pressure of such depths, and a divir Now, however, the testing out of a svstem, long under trial, has resulted most satisfactorily, although t! the pontoons to reach the surface that they tore out sections of the vessel’s sides—%j¢-inch plates—in thei tractorlike machine which is supplied with air by an internal system and with electricity by means of cables and 12 feet high, is a steel drill. The machine is moved up to the sunken vessel and the aril applied to its on both sides, the pontoons are lowered into place. These pontoons are steel cylinders, 12 teet in diameter through which the air is pumped to give them their lifting power. They are braced inside the “bell.” At through the valve into the caisson by the mother shiv, which results in such an upward pull that only « Tita dt Ba A_tnd the wlntec held The left-hond nart of the nicture shows the artict’s concention of the ac On the right appears the tractorlike diving bell, the chains dy a nto th. air unter its im>etus. which it is

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STEYECCESSFULLY ON SUNKEN “EAGLE” BOAT hall chamber filled with air, which, of course, tends to rise to the surface, pulling with it whatever it is ilvagers. One of the nrincinal troubles has been the inability to attach the apparatus to the hull of the Streneth could not be readily handled. ted test itself was not successful in one wav. This situation was brought about by the fact that so eager were ion by ent The difficulty in regard to pressure at the sea floor is overcome in this system by an electrically overated rom tlle’ Ship. Projecting from the tractor, which is operated by and carries three men in a caisson, 7 feet in diameter les. | f holes are bored in pairs through the plating of the ship. When a sufficient number of holes have been bored 25 feet The cvlinders are onen at the lower end, while the upper end is fitted with a heavy cav carrying an air valve trom—e00KS attached by chains. These hooks are inserted in the holes in the boat’s side. The air is then pumped ecent test, fully demonstrating their ability to lift the 300-ton vessel—an “Eagle” boat sunk in Long ed in the test, as they tore sections of the vessel’s sides loose and rushed to the surface, one leaning 25 feet or and later raised to the mother ship’s deck being seen extending upward from the top of the cylinder. 833

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POPULAR - PERMANENT HEADBOARDS AID SLEEPING-CAR PRIVACY Seeking to increase the privacy of sleeping-car passengers during the day, New Headboards as Installed in a Sleeping Car: Night a Removable Half Headboard is Added At experiments are being conducted with permanent headboards erected on the principle of a rigid partition between the seats. The innovation, already installed on nearly 100 standard cars, has the fur- ther advantage of permitting the occu- pant of one section freely to control ven- tilation at his seat without causing drafts to blow on other passengers. HIGH-VACUUM AND PRESSURE PUMP COMBINED A small pump of unusually neat de- sign provides, with one rotor and a single casing, high-vacuum and pressure service such as is required in surgical View of Compact Pump, Exposing the Rotor That Creates High Vacuum and Pressure at the Same Time MECHANICS work. The circular rotor turns jp oval chamber, leaving a space on eithe side. In one of the spaces vacuum ;. created, and in the other, pressure de. veloped. Brass plates, fitted with wedges that automatically compensate for wea; are set into radial slots in the rotor jy such a manner that, under centrifug, action, a tight joint is maintained wi the casing when the pump is running The pump forms a unit with the moto; by which it is driven through a gear, MACHINE ROUTS ELECTROTY PE PLATES THREE AT A TIME A machine has been developed t routs cut the dead metal from three ele trotype plates simuitaneously. Its use in preparing curved plates for rot printing presses. The machine is equipp: with three drums on which are mount: the plates, which must be exactly alik: and which are movable up or down a: from side to side under the control of t operator. The operator guides the m ment of the center one of three pov Machine Which Removes the Dead Metal fr Curved Electrotype Plates at Once driven routing tools, which are on spindles in such a way that t! is duplicated on the two other plat @ Engineers have disclosed, throu; veys of mechanical processes in i that lighting is the principal soi fatigue among workers. To the ir of bad lighting these engineers lay of 20 cents a day for each worker, ! this sum as the cost of lower eff This would mean a loss of about > 000,000 a year in the United States

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nN an either IM is c de- edges Wear OT in ifuga wit ining notor q Pw pens aa he ataver eye? The Artist has Copied the Interior of Omaha’s New High School in the Room Devoted to Manual Training and has Shown How a Complete Bungalow Built by the Pupils may be Moved Out of the Building to be Disposed of as a Home PUPILS BUILD BUNGALOW WITHIN SCHOOL [® the new Technical High School at Omaha, Neb., the pupils will be given the unique experience of building a complete bungalow, “life-sized” and ready for oc- cupancy, the entire construction taking place within the high-school building itself. The task will be undertaken as much to demonstrate the high-grade equipment of the chool as to teach the young carpenters their work. _ Doors large enough to permit the pupils’ structure to be moved out of the build- ing on rollers and disposed of for a real home have been provided. Those who are horities on the teaching of children declare that this method of instructing them rouses their interest a hundredfold as compared with that they display in building ture houses and other articles. [he school is planned throughout on this life-sized idea. In the automobile de- partment, a 3-ton crane has been installed to enable the students to work on real itomobiles. In these shops all the tools used by mechanics in garages, and many of new inventions, are available, so that the pupil will in reality have a thorough grounding in these trades when he finishes the course. Other features of the building include classes in salesmanship, where all the work- g parts of a department store are in use, even to the cash-carrier system of overhead wires and cages. In the auditorium, which will seat 2,000 persons, an arrangement of the moving- picture machine and screen has been made whereby there will be no distortion of the pictures shown. A cafeteria, a kitchen, an orchestra room for concerts, a library— In short nearly everything found in the lives of grown-ups—is provided in this remark- able institution. 835

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836 POPULAR DIAPHRAGMLESS TRANSMITTER IMPROVES BROADCASTING A new transmitter for radio makes pos- sible the broadcasting of music and other sounds with more of the original purity This clear- ness is at tained by eliminat- the dia- phragm, which, be- cause of its inertia, is in- capable of vi- brating in sympathy with all parts of the range of audible sounds. In the new trans- mitter the me- chanical disk is replaced by a minute elec- trical dis- charge which flows between two points, separated by a very small air gap. This discharge is affected by sound waves, but, having no perceptible inertia, it responds equally well to all vibrations, whether they are caused by high or low notes. The device is about the size of a large watch, and when in operation, a point of light can be seen, caused by the flow of elec- tric energy against one of the terminals ataeianneet €, X { i MECHANICS PORTABLE BAND SAW CUTs WOOD AND METALS A small portable band saw has appeared on the market that will modate itself to the cutting of every kind of material by a quick ot blades. A change of speed is for cutting hard metals like iron a; The table, which tilts up to an 45°, is mounted on a quick-acting It is designed for use on ben those found in pattern and mod tool rooms, and trade schools. AUTOMOBILE AIDS SINKING OF MINE SHAFT \n interesting example of the contrast between the methods of ern prospectors and those of a get or even a decade found work of a contractor who recently azo, 1S to sink a mine shaft for a western cate at Goldtown, Calif., then the of a gold rush. Finding the de! of the mining equipment he had « delayed, the contractor decided to us i1.utomobile engine to aid in the Hitching a cable, which passed block and tackle, to the front of hi he found it was easy to haul up buckets of material from the shaft car faced the shaft and backed away it in pulling up the containers, weighed, loaded, 400 p each. A smooth pat thus worn in the desert This View Illustrates the Resourcefulness of a Western Contractor, Who Used His Car for Hoisting The Method was Adopted After Windlass had been Tried and Found Wanting Loads of Gold Out of a Shaft. a Hand

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QUEER TREES OF THE ISLAND CONTINENT ¥ wa =6The Typical Views Above and Below Show Some of the Peculiar Trees to be Found ss in Australia. The Circular Insert Is a r ttle Tree of Aus- View of the So-Called “Canoe” Tree, from The “Timber Getters.”’ It Is Not of Which the “Blackfellows’’ Cut Bark for Cutting Down One of Height, but of Canoes. The Eucalyptus, Found in Great the Tall Species of the Very Wide Girth Numbers and Varietics, Is an Evergreen, Eucalyptus Family Shedding Its Bark Instead of Its Leaves. The Grove Below Indicates the Naked Ap- ey of the Trunks. Note the Contrast etween These Trees and the Tall Species Right View Ceili ty in the Upper

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838 POPULAR MECHANICS

— OXFORD RACING CAMBRIDGE —" CREW MAY HAvVe NEW BOAT MODEL

CENTER SEATIN AGE 3 in, THROUGHOUT ee re A new racing boat being considered Oxford Universit, ing officials, whic! rst ' At iGin, ran ee supplant the desig; OXFORD : | hitherto used. One 4 ee ‘OF BOAT 60 FT. 7. LENGTH OF SLIDE OF SEAT 16IN."——ALTERNATE-

P RIGHT, THE GPHEnE, LONDON atuttie ola . f A Comparison of the Principal Dimensions of the Oxford and Cambridge nately right and lei Shells: The Lower One, Oxford's, Has Alternate-Side Seating stead of in the mi

CHAIN OF GIANT RESERVOIRS ly 70,000,000,000 cubic feet, and it is URGED FOR RIVER SEINE mated that, even should the Sein almost to its record flood height, th New plans are continually being made reservoirs would serve to reduce su looking toward the control of the Seine’ rise by one-half. They in time of flood, when the rise of the waters endangers the commynities along its banks, including the city of Paris. Among the latest of these is a scheme would also able to hold a reserve supply of wat during the dry season when the lowering of the Seine hinders shipping. Anoth use would be in irrigation, and by bui calling for the erection of 23 huge reser- ing power stations at the entrance voirs along the banks of the river which’ the reservoirs, 300,000 horsepower would have a combined capacity of near- be developed, it is believed.

PRECAST TILES MAKE FOR ECONOMICAL BUILDING A new way has been found to reduce’ tion in Berlin. L-shaped tiles are still further the cost of building construc- to form hollow walls, the long legs oi t! m : “L’s” forming the \ | faces, while the short legs act as distan:

ps ae

Z Bi spacers between thir te walls. The tiles are pr: ? vat cast in steel forms, about m* 30 at a time, so that t! 5 exterior faces of +3 form are also the int: : ‘S. faces of the next ad =} ; . ing one. Suitably p - — lugs on each form

e Liladidilde ay ESS with those of its ne Dee aed pl te bor, providin a ae anne eh. vt preventing shifting of the indiv forms with respe each other, and so serving uniformity 1 blocks. The block < me “ course. may be suriact

; sated f smoothe The German Method of or Building Blocks: Note the Economy of treated Soa snoerne Placing the Forms So That the Blocks Have a Common Wall between Them pearance.

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{AIN of 10 strands connecting the rth and the moon could be made the beans grown in the United ina single WONDERFUL SELENIUM “EYE” Sorts Bad Beans from Good with More than Human Accuracy By R. C. FOLGER had the beans been good. He thereupon determined to build a machine that would sort beans at low cost at all times, and, even in the event of ere placed » end. Im- having to it every tenth entieth bean uch strings! ng quite occurs in ing of beans, bad ones » be picked ‘re market- product. ¢ to the high s they have f in recent ans are no regarded as ———— — a low-grade crop, leave the grower a fair profit. Without scientif- ic training, Ray F. McWilliams, the farmer-inventor of this bean _ sorter, began casting about for some- thing that would detect the differ- ence between a good bean and a bad one, the latter being darker in color either wholly or in spots. He learned that a min- p food. One reasons for the primitive still used for sorting beans. Rows ymen seated in front of conveyors ut the bad beans, casting the as the bad ones are called, into a hich is weighed at the end of the to determine the pay of the women. tunately, many causes beyond the | of the grower affect the quality of an crop; bad weather and blights result in This Machine, Which is Easily Moved About by Two Men, Sorts 15 Bushels of Beans an Hour eral (selenium) was sensitive to changes in light reflected upon it, re- sulting in a similar variation in its elec- trical conductivity. Obtaining a sele- nium cell, he made experiments to learn whether he could use it for the machine he had in mind. The cell and others he later obtained, lacked the neces- sary sensitiveness and was too slow in reacting to light changes. Undaunted, he proceeded, with percent- culls in bushel. Michigan re was a ing farmer 0 yearly d this situ- with a tioning science the limited re- sources at his command, to unravel for himself the se- crets in the construction of a selenium cell, and, thanks to an accidental discovery, the ided in end of a year cheaper found him with ls for in- a cell he could and for use for his pur- agricul- pose. The new process- cell could why could ot help in sorting of ns? One he reaped an 8, End of Flexible Spout; Hinged Flap; exceptionally In This Close-Up, Number 1 Is Feed Roller; 2, a Small Hopper; 4, Electric 6, Selenium Cell; Fingers; 9, Small Rollers, and 10, Guides along Rollers poor the culling of which consumed about the money he would have received detect the slightest change in color and was quick to respond to these changes. For seven years longer he worked in the develop- ment of the machine which today picks Light; 5, Hopper with 7, Double Lenses; 8, Picker 839

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840 out the bad beans from among the good ones with more than human precision The beans are placed in a trough at the top of the machine from which they are fed by small wheels through a series of hoppers until they pass out in single file along a pair of horizontal feed rollers. A selenium cell is placed over each pair of rollers, and inclosed that it receives light only through a tube, the lower end of which is di- rectly over the moving string of beans. As the pass under tube each one ceives a flood of light from an electric bulb, which is focused on it through a double lens. When a discolored bean comes into range the selenium cell reacts to the change in color, causing a magnet to close, thus raising a finger which pushes the bad bean from the rollers, while the good beans pass on into, a bin and are then ready for market. The selenium cell is electrically con- nected with a pair of ordinary dry-cell batteries to form a circuit which 18S SO be ans the re- Note the Bad the SO as Close-Up of Two Units of the Bean-Sorting Machine: Bean Unit at the Left POPULAR MECHANICS operates the electromagnet. Hinged a support alongside the magnet i finger, one end of which extends ovs magnet, while the other curves a: and over the rollers in such a manne: its end is opp the lower et of the tube. When bad bean appear the selenium instantly “see darker colo: contrasted that of the x white beans immediately up a greater 1 to the « trical current ing throu This cause magnet to drawing doy end of the finger, so that t other end is ra In being raised, t finger pushes bad bean off rollers, and it drops into a bin. The stant this is done, the change in lig seen by the selenium eye releases magnet’s hold on the finger, which retu to its first position. The good beans tinue on their way down the rollers, ping into another bin. The machine is about 5 feet in and length and light enough to easily moved by two persons of ordi: to ance Picked Out by is This Illustrates the Long-Practiced Method of Sorting Beans. the ovement of a Small ‘ Belt Carrying a Stream of Beans toward Her; are Picked Out by Hand and Deposited in a Box alongside the Belt Each Woman Operates a Treadle That Con the ‘‘Culls”

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POPULAR strength. 16 cell units, which provide for a total sorting capacity of 15 bushels of beans an hour, or equal to the average work done by a dozen persons sorting by hand. The machine is driven by a 4%4-horsepower Each machine is equipped with motor, and the operating cost would bably be less than the wages of one who alone could tend a number of 1 machines. Another advantage of machine is that its capacity for un- ted beans would not be affected by “WALL” OF WATER ROCKS OCEAN VESSEL owering 70 feet, a “wall” of water be- lieved to have been set in motion by a marine disturbance, nearly proved dis- rous to the Pacific liner “Brush,” 50 s off the coast of Mexico recently. captain of the ship described the proach of the strange freak of nature in unbroken black line near the hori- n when first observed by the lookout. Vhen its nature was discerned, the ship ; made ready for the onrush of water. When the wall hit the “Brush,” the cap- tain declared it was as if a huge hand id clasped the vessel and raised it into the air. There was not a breath of wind, ut for six hours after the occurrence, the log of the ship shows, the “Brush” bored in swells equal to those off Cape Horn and was driven miles off its course. LAZY TONGS LIFT VALVE SPRINGS EASILY The difficulty of lifting valve springs of an automobile engine to permit re- moval of retain- ing pins, is great- ly lessened’ by means of a set of lazy tongs recent- ly devised for the purpose. Extend - ing the tongs closes the jaws. These latter are then inserted under the valve. Pushing the tongs shut has the ef- fect of opening the jaws, thereby lifting the valve. A suitable handle gives a firm grip to the user. MECHANICS 841 how many bad ones were in the lot, whereas, in hand sorting, the more bad beans there are in a bushel, the longer it takes to sort them. Grading of coffee beans as well as sorting the ordinary varieties of food beans can be done by the machine. It has also sorted olives according to the colors of green, red, and dark purple Undoubtedly additional uses could be found for the machine in many other fields. LEANING PINE OF ROME LEANS MORE THAN TOWER OF PISA There is a leaning pine tree on one of the golf links near Rome, Italy, which, unlike its famous contemporary, the lean- The Unusual Direction of Growth Taken by This Pine Tree Adds a Queer Touch to the Landscape ing tower of Pisa support. Its curious growth has prompt ed much interest. To preserve its co shade, much desired by picnickers, the municipal authorities have constructed brick pedestal, cradled at the top to re- ceive the curved trunk and support it. requires a man-made @ Tests of samples of alluvial deposits in Pumpsaint, Wales, having shown a high percentage of free gold, it has been pro- posed that the deposits be worked by dredging.

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POPULAR MECHANICS NEW COTTON GIN USES greater usefulness, only 20 per cent : TWO SETS OF SAWS power is needed to run the machine feature of the invention is that the uy; By using two sets of gin saws instead set of saws revolves 100 or more rey of one, a Texas inventor claims to have’ tions faster a minute than the lo doubled the capacity of a », cotton thereby relieving the latter of some gin. In spite of and enabling the handling of the lon staple cotton. Hitherto, the long-fib cotton has been run through rollers stead of saws. BUILD FRENCH OCEAN LINER ON NEW POWER PLAN Both as a means of saving valu space and considerable fuel, the 1 French liner “De Grasse” is to be powe by a combination of electric motors Diesel engines, the former to be d: by the latter. There are quite a nu of electric ships afloat whose current generated by means of steam tur! but the present case is said to be the in which so large a ship—it will b: 18,000-ton vessel—will use Diesel en in this manner. Space saving will be had in that it not be necessary to build a huge tun from amidships to the stern to house propeller. The generators will be p where convenient, and the current « veyed to the motors at the ends of sh as short as can be practically contriv: | It is a well-known fact that Diesel Cotton Gin with Two Sets of Saws, Which is Claimed gines are less costly in upkeep than ste to Give Double Capacity turbines. GAS-BURNING NOZZLE AVOIDS FLASH-BACK A new nozzle of simple design is re- quietly burning flame surrounding t ported to have overcome the difficulties main orifice, which is thereby heated of the name being blown out, owing to the veloc- ity of the outrush of air and gas being greater than that of the flame propagation. This con- dition is often encoun- tered when an attempt is made to burn a premixed combination of gas and air. Around the main orifice of the new nozzle is an annular casing com- municating with the pes orifice by means of The Gas-Burning Nozzle, Here Seen in Action, Overcomes the Danger four small holes through Flash-Back and of the Flame being Blown Out which passes a small quantity of the gaseous mixture. With ficiently to insure ignition and complet: reduced velocity inside the casing, the combustion of the mixture passin small quantity of gas forms a circle of through it.

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il Subsoiler with Solid Billet of Annealed Steel Used for the Shank: Compare the Size of the Simple Parts of This Machine with the Girl in the Picture SUBSOIL TILLAGE INCREASES IN CALIFORNIA need of breaking up the hard soil it exists just below the soft top practically throughout California for the remaining nine months ot growing season; thus, hardpan and pk sole, which force the rain water to d1 off, must be broken up. ed to the development of a number verful machines in recent years Deep tillage consists of two operatio1 farming implements have to be de- chiseling and subsoiling. The for | to withstand the tremendous’ goes to a depth of from 6 to 15 inch ns that result from resistance offered by tubborn subsoil. — hardpan, as this stratum is called, two kinds—natural artificial The r may be found at face or m in feet the surface, andl it from a few incl anv feet in tl Che artif e inger lying in this dition is that the soal Ing t] soft upper e i av from . _ fields when it strikes Heavy-Duty, Deep-Tillage Cultivator Operating at Depth of , . The Large Teeth Tear the Hardest Soil lardpan and plow e, which it cannot soak into. Since, in whereas the lifornia, it rains but three months out t 48 ) the year, the moisture must be saved subsoiling reaches down 24 inches. Often 225 horsepower is required to pull the tillage implement

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BROKEN RECORDS AND IMPROVED MACHINEs 7 om Above: Lieutenant Lester J. Maitland, Who Established a New Speed Record, When He Drove His Plane over the Course at an Average of 239.95 Miles an Hour Target Glider Carried on Upper Wing of Plane: When Released by Pilot, It Descends at About 30 Miles an Hour Thus Furnishing a Realistic Target for Anti-Aircraft and Airplane Gunners. It Weighs Only 23 Pounds OO a BB Gliders of This Type, Known as the “GL-2,” are being Developed by the Army Air Service for the Purpose of Instructing Beginners in the Science of Plane Control, without the =xpense of Purchasing and Operating Motor- Driven Planes

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DEVELOPMENTS IN AVIATION In the Picture Above is Shown a View of the Fokker Monoplane ‘“T-2,"" Used i Establishing the Endurance Record of 36 Hours 5 Minutes 20 Seconds, Made at Dayton, Ohio, by Lieutenants Macready and Kelly. This Shatters Their Own and Other Previous Records, and at the Speei They Maintained in Cruising around the 80-Mile Course, They Traveled Far Enough to have Crossed the Atlantic. The Ship Flew at an Altitude of About 2,000 Feet and Made 75 Miles an Hour At the Lieutenant ready, and Lieutenant Oakley Kelly, Who are Accredit d wih a New Airplane Endurance Record In This Picture is Shown the Aijir- plane Engine Which Recently Completed a Rec- ord-Breaking of 573 Hours with the Throttle Wide Open. This Is Equivalent to Driving an Ordi- nary Airplane a Distance of About 60,000 Miles

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S46 POPULAR CONVENIENT DRILLING TOOL IS MOTOR-DRIVEN A new utility drilling tool designed with especial reference to engraving work, Motor-Driven Tool That Helps to Solve Hard Drilling Problems: It Is Easily Portable is driven through a flexible shaft geared to a universal electric motor, which 1s pivoted to the base. The chuck, which takes a wide range of drill sizes up to ¥% inch, has five speeds, from 500 to 2,000 revolutions per minute. OX-DRAWN SLEDS THRESH EGYPTIAN GRAIN It is difficult for the American farmer, who uses agricultural machinery for practically all his operations, to realize how crude and rudimentary are the means used in other parts of the world. In Egypt, for example, a floor of beaten earth is used for threshing grain. The heads and straw are laid down lengthwise of the floor, and a crude ox-drawn tim- ber sled is driven over the stalks. Iron MECHANICS disks, mounted in the heavy frame of the sled, press out the grains, at the same time crunching the straw, which is later used for fodder. Broomlike wooden forks are then used to separate the grain from the chaff by tossing the mass up into the air, the prevailing northwest wind in Egypt being an essential factor in this operation. In spite of the crudity of the method, it is claimed that good results are attained. WATER-SERVICE BOX HAS SAFETY FEATURES A new water-service box, intended meet the requirements of railroad work, is designed with a view to convenience and safety- first meas- ures. The box, which is built to be set flush with the ground or pavement, containsa lever-operat- ed valve that must be either open or com- pletely closed, and which is provided with a standard air-hose coup- ling. The de- vice is non- freezing, is arranged for connection surface drain, and has a self-closing cover. CONCRFTS Egyptian Threshers, Using Oxen to Draw the Heavy Timber Sleds over the Grain on the Earth Floor: Woode: Forks are Used for Separating the Grain from the Chaff

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POPULAR MECHANICS

A Construction View of a Building Operation, Showing the Individual Caisson Hoists Rigged Up over Each Pier or They are Housed Over to Af- Shelter from Wind and Cold in and from the Heat and Rain Summer. Deep in the Bottom of e Wells the fe le Fill the Buckets. t Close-Up ‘of the Operating ianism for a Single Caisson. It is Electrically Driven

CAISSON HOIST FACILITATES FOUNDATION WORK \n individual caisson hoist for | or pier in a foundation was considerable success recently. This cedure has several advantages over endless-cable system, in which 10 or re piers are worked at the same time a single drum and engine, driving an lless cable encircling them all. In such method the entire operation may come a standstill if the cable fails or a save becomes worn. Furthermore, the t-up must remain in place until the last ll is finished. On the other hand, the lividual hoist can be set up anywhere, n under a _ building already built, thout regard to the location of other ists, and it can be shifted as soon as it is completed its particular well. It is lectrically operated, and is protected gainst reverse motion by a_ positive fety device. each used RED FINGER LIGHT TO AID NIGHT AUTO SIGNALING A small red light worn on the finger like a ring, has been made to aid night sig- naling by mo- torists. Asthe driver ex- tends his arm and hand to signal a turn, or whatever it may be, the lamp is auto- matically lighted by the outstretch =< ing of the fingers. can be plugged into under the driver’s seat. A The cord connecti the dashboard 1}

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TURNTABLE FIRE LADDER EXTENDS FROM TRUCK An effective fire-fight- ing unit is seen in a new extension ladder of English manufacture which is considered re- markable for its great “reach.” The ladder, which is built to reach heights of 60 to 90 feet and upward, if neces- sary, is mounted on a turntable carried over the rear axle of a mo- tor truck. It can be used either for life- saving Of as a water tower. The truck mo- tor operates the ladder mechanism by means of two levers under con- trol of the driver, indi- cators showing the amount of the extension and the safe angle at which the ladder can be worked. Raising and extending the ladder can be done at one time. The four sliding sec- tions of the ladder are raised by wire ropes, safety devices prevent- ing overwinding and the ladders from drop- ping in case a rope should break. Revolv- ing the ladder around the turntable may be done by hand or with the motor. Adjustalle hinged struts at ¢ rear of the chassis pro- vide direct support from the ground, in stead of through the wheels and springs when the ladder is in operation. In the t: eling position the Jad der sections are folcd lengthwise above the truck, running over the platiorm from the forward and a few feet beyond the radiator RADIO NEWS SENT TO CHINA A commercial te] graph company has su ceeded in i -ae ei may daily messages fro Hillsboro, Ore., at radio-receiving | stat set up recently ne Shanghai, China. k« ception is over a lo antenna, transmiss being through a stan ard arc used later in t! day for working a Por land-San Francisco dio circuit. The way length is 8,609 meter: ™ ed Motor Turntable Fire Ladder When Fully Extended to a Height of 90 Feet: With the Truck Stationary, th Ladder can be Turned Around at Right Angles to the Chassis. Indicators Give the Extension and Working Angle Found Safe 848

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POPULAR MECHANICS S19 TWIN ROTARY BLOWERS SHOOT SNOW FROM HIGHWAY newly developed machine for clear- ighways and city streets of snow put through severe tests recently, satisfactory results. It is a twin machine, two blowers with very nozzles being used to suck up the ind shoot it off the roadway. An rsepower gas engine is used to fur- power, but the outfit eli-propelling, and must be hauled it by a tractor or other means. Its ipal use is to “break road” quickly ediately after a heavy snowfall, and these conditions it cuts an 8-foot very effectively le necessary SUN’S RAYS AND FLASK BURN | FINISH ON OFFICE DESK yw simple it is for a fire to be started recently office at N. Y. The rays of the sun, coming ugh the window, fell on a shown in an Cor- decanter TAL KURA oy a ‘ 7 Sucking the Snow ) the Highway or Cit, Street and Shooting It as Far as 100 Fect from the Road. Under Test | Conditions, Show | Above, a 10-Ton Tractor | was Used to Haul the Machine Around, but I enerates Its Owr Power for Operating the Suction Blowers = J that was being used as a vase on the desk. It happened that the rays wer concentrated on a spot about the size of a small coin, such as would have been the case had a sunglass been used. As a result, the finish at that point on the desk was burned through. The Sun's Burned a Hole throu Luckily, N ) Papers were Rays, Concentrated by the Decanter, gh the Finish of This D T A | A

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l 3O[2 | i “Mh 4993 OST PUB Spm 4333 Qg ‘jRoY dn19-LHova V OOVOIHD NI GHHINAVI LvO1a at wt =a sere ‘ — ee ae - ” . ry neeatieiiahtihael a, wes « Fe oe ; “ 7? - Xo it a eee ite Tet 1 3a cm 5 A Fe | A >

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LATEST ADDITION TO THE FLEET OF THE NEW YORK YACHT CLUB HE grace and swift, birdlike motion of the sailing vessel are admirably brought out in the painting of the “Husar IV," here reproduced. The vessel is a pleasure yacht built for a New York ortsman and recently launched at Copenhagen, Denmark ‘or cruising purposes, s $ s ample canvas, on a 600-horsepower crude-oil engine. It is 200 feet long and will a crew of 25, exclusive of thicers.

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$52 POPULAR MAIL-BOX SENTINEL DEFEATS LETTER THIEVES The activities of mail-box thieves, who can easily take letters from the ordinary At the Left a Man is Seen in Vain Attempt to Pick Mail from Letter Box Equipped with Wire-Hook Appliance Recent- ly Placed on the Market At the Right, View Showing Wire-Hook Antitheft Appliance as It Appears } on the Inside of a Letter Box: Note Letter Gripped by Lower Series of Wires \2 1GHT ARKE & HYDE box, are rendered fruitless by the attach- ment of a simple hook appliance recently placed on the market. This two overlapping series of wires, having their upper ends coiled to impart a spring action to each series. When placed against the letter opening on the interior of the box, the upper series, like a one- way gate, permits the letter to be inserted and to fall into the box. The lower series of wires, however, has hooked ends, and guards against any attempt to withdraw the letter through the slot consists of SPRAYED COTTONWOODS SHED NO COTTON The United States Bureau of Plant In- dustry has developed a method of pre- venting the growth of the blossoms of the cottonwood tree, thereby freeing that popular shade tree from one of the great- est objections to its use, the falling of the cotton. Spraying with a 2-per-cent solution of sulphuric acid is the method resorted to, and when done in the spring, is @ffective in stifling the growth of the annoying tufts of cotton which otherwise would strew the streets and yards. A spray of kerosene, gasoline, or common- salt solution also gives desirable results, the last having the advantage of cheap- MECHANICS effectiv: and prop: also trees ness. Crude oil, while dishiguring to both and, of course, the acid spray may be used in contact with iron part: sprayed in the spring, before the le come out, no injury whatever result the tree itself. NEW VARIETY OF PEACH DEVELOPED The efforts of horticulturists to su; the need fur a yellow peach ripenin, little later than the so-called “Elbert peach has resulted in the develop of a new variety which seems to fill -1 desired requirements. This peach, ca “Wilma,” is as large and of the s color as the “Elberta,” but is roun held to be of better quality, and rij a week later than the latter. The t: are vigorous, productive, and hardy, have therefore been recommended to York State fruit growers, as well as chard owners elsewhere, as suitable localities where the winters are severe STICKER LABELS FOR AMATEUR RADIO PANELS The number of radio enthusiasts are constructing their own sets has be growing so rapidly as to prompt enterprising manufacturer to bring something new for adding distinction the completed product. This is a set sticker labels, having a gold-dust suri and bearing suitable identifying lege: as “aerial” or “loading coil,’ which be quickly applied to their proper p! When applied, these la! perceptible on the panel. have no thickness to These Labeled Stickers are Intended for Amat: Makers of Radio Sets touch, and add greatly to the finis! appearance, and increase the convenien of the homemade panel.

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POPULAR MECHANICS 853 * ae r,s or wha ec “age Se Finn Laying a Smoke Screen at a Height of 100 Feet above the Surface of the Water: It Is the Ability of the Seaplane to Regulate the Height of the Smoke Screen That Makes It Effective SEAPLANE LAYS EFFICIENT MUSSEL CULTURE WILL HELP SMOKE SCREEN PEARL-BUTTON INDUSTRY use of dense smoke clouds by An important step toward insuring an vessels for the purpose of screen- adequate supply of raw material for the ttleships from the enemy, has been pearl-button industry is being made by ced for a long time Fast de the United States Bureau of Fisheries, ers are usually employed to lay the which, for the first time in history, is cul | of heavy smoke, which is produced _ tivating fresh-water mussels during the - ulating fuel and draft in the main entire first year of their growtl The /R Recent tests, however, have activity of mussel culturists heretotore d the efficacy of seaplanes in this has been confined to getting the young In fact, the seaplane has at least bivalves well started in lite, during the ilvantages over the destroyer: It brief period when they attach themselves lay a screen much more rapidly; it to the gills and fins of fish. Now, how regulate the height of the screen ever, as a check upon the effectiveness of ve water, and may make it completely their work, the fish will be kept in large elop an object by flying over and wooden troughs until the mussels drop und the latter. When a seaplane is’ off, after which the latter will be retained | for laying the screen, the smoke re-_ in the wooden tanks for a year, the bet- its from the introduction into the ex- ter to observe and facilitate their growth. t pipe of chemicals that increase the The mussels will then be planted in their ume as well as the density of the ex- natural environment to complete their ust gases. life cycle. plane Enveloping the Army War College Building with a Smoke Screen Laid at a Height of 50 Feet above the Ground: The Seaplane Has the Advantage of Speed over the Destroyer Previously Used for This Wor

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85 } POPULAR NEW CIRCULAR BUNGALOW SAVES SPACE AND STEPS Dissatisfied bungalow, a signed a cheap to con- struct and easy to maintain. The structure of the inner room, the larg- with British circular the usual type has ¢ which ts architect bungalow

MECHANICS

valuable land. In several cases, a Levan, Nephi, Parowan, Beaver, Cedar City, the townsites are so clo the cafon mouths that some of the | erty involved is particularly valuab|: In some instances, the gravel cx several ac and gro deeper larger w each spr freshet, fc of le-

est one, forms ing fan-sh the backbone deltas. N of the whole channels } framework, been excavat and from the annually corners of this, these gra S1xX partitions deposits, oO1 radiate, giving to be fil space for four again in rooms, a kitch first few en, a hall, a of the sn servant's bed fed freshet room, a bath- barriers h room,anda “ > been coustru larder, in addi \ [f As ed tending tion to the in- \ BEDROOM Y W confine 1 >| \ - ss ner room. The f ae \ stream, a1 outside wall ~ So > \ other dev: " . ij * ~ 9IN 7 forms a poly- Ff . 7 , and sche: . = ~ * ar 5 - gon of 12 sides, BEDROOM - BEDROOM have ber a dome fitted tried, with o1 over the center z temporary m pr y lin ™/LANTERN J roo yroviding = , = cess. . : i" LIGHT light and air 2 Probably A form of lami jf best arrat saad DINING ROOM // re) wood— ‘S, KITCHEN \ {DRAWING ROOM _// m Os ; \M r three or more , stalled at I’ P yy aN <f ~ layers of wood % “ane cee wan so

cemented to x gether undet years ago the form «

great pressure riprap of lar and stitched loose los with thin cord framed acr: —isusedin = ee | Ga |e the channel construc ting Outside View, and Floor Plan, of Bungalow Designed with a the midst the } val . View to Economical Construction and Mainte- } . 1 bungalow, nance, and to Convenience the gravy all sections of dette. 1 which are ready-cut at the factory and so tended to lift the stream and check designed as to enable three men to as- semble them into a house in a The accessibility of every save many steps daily. speed so that the suspended gravel deposited in the place selected by t builders. In fact, by an ingenious arran ment of the logs, which allowed a shit ing of the current when the deposit built up to a certain height, the build: obtained deposits of sand and gravel rather uniform sizes, which were use later in highway and building-constru tion work. Also, by a system of wings it was p: sible to produce the deposits in suitab depths for ready loading by the week should room CHANGING A RIVER’S MENACE INTO A UTILITY The spring flood waters in many of the mountain streams of Utah carry large amounts of gravel to the cafon mouths, where the arrested speed of the current the gravel to be deposited over allows dur

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POPULAR MECHANICS 855 Above: Rear View of Combined Soy- Bean Harvester and Thresher, Showing Removal of Beans after Trip across Field Left: Machine Operating in Field; Note That Machine is Offset from Tractor Which Travels over Harvested Ground ‘ eed it the rea ot ‘ ie The beans drop the screens into boxes that a1 large enough to hold the accumu lation from one complete try across a 1,600-foot stretch. The machine is tractor-drawn, and it is stated that it will harvest ay proximately an acre of beans in one hour. method, after the floods had subsided GASOLINE BLOWTORCH HAS FOOL-PROOF FEATURES ravel-arresting dam at Kanosh, on rn Creek, will have an initial capacity about SU 000 cubic leet ot gravel, but Unusual features to promote safety n be made to carry twice that amount | . . have been embodied in a new blowtorch ulding a few feet to the height of the on the market. It uses gasoline or now er. kerosene _ as fuel. One BEAN HARVESTER THRESHES of its favor- IN SAME OPERATION new machine for threshing beans hey are harvested has been built by bean grower who found separate vesting and threshing too expensive he front of the machine are two slots 1 for a row of beans, with guides it deflect the bean plants into the path the slots, where the beans are threshed by vertical beaters that strike both des of the plant. The beans that fall m the pods are elevated by drag chains the top of the machine, where shaker separate them from dirt and er forergn materials, these being dis- } i? reens able points is a safety valve that blows off at 40 pounds’ pressure, whichis about twice t he normal. Another ad- vantage is that there is only one opening in the tank, above the fuel line, which troublesome soldered connections eliminates

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swollen River tore a great jagged hole in the dam that the winter — the waters of Willamette late last impounds it to manutacturing serious the City, for Oregon supply plants at pow rT n engineering problem This was to restore the dam and to keep the wheels of industry running in the meantime. The problem was solved by an engineering feat of exceptional diffi- culty. arose the dam controls a large body of water that is diverted from the Willamette above the Oregon City falls, a Which, though not high, is famed for its beauty, and is familiar to travelers in the cataract West The flood resulted from heavy rains and warm temperatures that melted the mountain snow at the source of the Willamette and its tributaries Che switt water, growing to almost unprecedented volume, practically leveled the falls, 1n- undated the surrounding country, and exerted a tremendous pressure which the timber dam, SOO feet long and 1/7 feet high, could not withstand At the height of the flood came a cras}] of tearing timbers that could be heard above the roar of the water \ section of dam, 100 feet long, was swept away and the pent-up water found a new out- et through which it rushed As soon as the waters had receded sut- ficiently to permit operations, engineers surveyed the situation. The usual method would have been to construct a coffer dam and then make the repairs in com parative safety. This method was re- jected, however, because it ould have meant closing down many factories, en tailing great loss to the paper and woolen mills affected. However, since the river was certain to remain at a stage of com- paratively high water for several months, and since, even with the gap in the dam, there was sufficient power to keep the mills running, it was determined to re- dam without the protection of a cofferdam. Several methods were was first decided to build a great slab of reinforced timbers and beams and to slide it into place, as a section of the dam, store the 20 feet at a time. This was abandoned as impractical, uncertain, and costly, and it was determined that it would be more feasible, although hardly less hazardous or difficult, to.bridge the opening one timber at a time. The first step was to build towers of piling, 20 feet high, at each side of the S56 MILLS RUN WHILE POWER DAM IS REPAIRED By HORACE E. THOMAS gap and to string a 2%-inch cable tween them. Hanger rods were atta to the cable and from the rods was pended a large beam constructed of timbers, each 8 by 16 inches, secu bolted together. As soon as this wa place, it was strengthened by a fra work of large timbers heavily braced The upper surface of the dam ha slope of 45°, and the next step was slide into place, one by one, the timb« that were to form the component u! of the dam. Each of these timbers 14 inches square and 26 feet long vas no simple job to place these timbe: but once in position, they were he securely by the pressure of the wat: and the reinforcing that connected th: vith the part of the dam already in pla lhe great beam on which they rest could not have borne the terrific wei if it were not for anchor cables attach: to the beam at right angles and fasten: on shore. Several of these soon as the beam and others added, every 70 inches, as 1 deck of the dam was built. Turnbuch vere provided, so that the cables mig be tightened as required to keep 1 structure in alinement. Che difficulty of the work was creased by the fact that the lower e1 of the timbers rested on solid rock would have been much easier to get the into position if the ends could have be: buried in mud or sand. Once they ws in place, the usual method of hold them with sacked sand was followed Hazardous as the work was, it p eeded without mishap. With the seas of low water approaching, contract: rushed the dam to completion, so that the time the river fell, the dam would ready and the mills kept running cables Wwe attached as was l: ELECTRIC TREATMENT RAISES VISCOSITY OF OILS That the viscosity of mineral oils be raised by a combined treatment electric discharges and with hydrogen the contention resulting from a systematic experiments pleted. The treatment cosity. of the oil and makes 1 resistant to high temperatures, rendering it suitable for use in place more expensive lubricants, such as cast: oil, in machines like air Diesel engines. and motors, it is claimed series recently increases t CoO?! t I herel compressot internal-combust1

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Above: Looking along- side the Dam, from One End of the Temporary Framework, Erecte to Assist in Stopping the Gap in the Dam. The Rushing Waters Made the Repair Operation a Hazardous One. Below is Shown the Opposite Face of the Dam, at the Crest. Heavy Cables Anchored the Frame- work to the Shore * - SE OP EL E Se) a Ss ae 857

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POPULAR GLOVE PROTECTS THROWING HAND OF CATCHERS \ baseball clove to protect t] e ‘hers is being introduced Above: A _ Close-Up of the New Glove. Right: As It would Appear When Worn bva Catcher } 4 in Batting Practice by a q ' Vy |" | >i sporting-goods company. The rst it with the exception t ylove }j lay “1 ularl protect pitches. L @i have to be discarded, would interfere with throwing the tips and wild would, of course, since it ball. POCKET MICROSCOPE FOR FIELD WORK A handy, compact microscope has been patented recently and placed on the mar- ket, designed especially for the use of those who frequently wish to make ex- Left: A View of the Microscope Made to be Carried on Field Work. Above: No- tice the Small Size of the Instrument MECHANICS aminations while away from the tory, and for students. The inst: has a range of magnification fro1 225 times, is equipped with a | focusing device, removable stage clamps, and reflecting mirror. Phe nification is obtained without inter ing lenses by simply withdrawing scoping its tubes, which are convert marked for this purpose, to the degree. A dust-proof protective provided, and the instrument is enough to be carried in the pocket PORTABLE PEELING MACHINE FOR SMALL RESTAURANTS A peeling machine which is small, and can be put out of the way whet in use, has been made for smallet rants. The device, consisting of Portable Peeling Machine in Operation: It is Cor iently Rested on the Sliding Board of a Kitchen lar metal discharge drum with an intake chut door, a hose connectio! water-discharge opening, and an ele motor, is placed on the sliding boa the kitchen sink. Peeling is accomp by: an arrangement of revolving forated cylinders, while a_ contin stream of water washes out the fine and dirt. It is claimed the devics peel 15 pounds of potatoes, other similar vegetable in minutes. @ Rubber bands placed about Sunday home-subscription issues ot Indiana city newspaper. It is cla that the innovation prevents the vat sections of the papers from being b! about, and lost, while on the pot doorstep. turniy are

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POPULAR MECHANICS 859 . " ; Poses pool >.* ’ _ ~~ eres COCONUT FESTIVAL STAGED IN SOLOMON ISLANDS N TIVES of the Solomon Islands, who, because of their 4 ave long had an unenviable reputation among civilized nations, are gradually becoming less savage trong British, German, and Dutch influence, they are largely confining themselves to more humane s and ceremonies. One of the more popu'ar of these is the festival of the coconut. Thousands of ts are strung along poles, ani the tribesmen circle about them in a weird, frenzied dance to the musi ms. Afte ward, the coconuts are eaten at a great feast TI interesting photograph given here a group of the warriors decked out in their holiday regalia, was snapped just before the festival be- Behind the tribesmen can be seen a sec:ion of the cannibalism, head-hunting, and other cruel habits, conut poles around which they dance. OLD NEW HAMPSHIRE MANSION on the l mansion will be moved. prob rO BE MOVED TO NEW YORK ibly by dismantling it and shipping it pieces It ill be incorporated as part undertaking of no little difficulty of the museum, ane its treasures the Metropolitan Museum of New on view to metropolitan visitors in the transport New Hampshire ~—_ ve 3 on to Gotham hing for a suitable e for its colonial res, the museum purchased the orth Gardner e, at Portsmouth, .. built in 1/60 Lining as it does it the finest ex es of colonial art cularly carved ork, the museum irities believe it can laced as a wing to yet att * veneeaibiill present museum Thi com AE The old furni is alreadv been The Wentworth Gardner House, Now at Portsmouth, New Hampsh . . Where It was Built in 1760 It is About to be to New York, and Moved t New York City

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SoU POPULAITI i MECHANICS CHILD’S PUSHCART CARRIED the bankers of Brawley and the Vet LIKE BRIEF CASE \ new pusheart used for wheeling c Bureau, each ex-warrior picks ou farm and contracts to pay for it in hil- 14 to 28 years. The cost nat dren along the street, that folds up and varies according to the character an be carried like a brief case, is being land and the improvements made. ing the first three the veteran is re to pay only 3 per interest onthe \fter the third ve must pay one-fiftiet the cost ever months. On these 5 stallments he pays 5 cent the first two and 7 per cent for remainder of the pr As the buyer most instance starting the expe with very little « the owners of the are furnishing vine fruit trees and 7h ‘ é : necessary l1mprovel Left: Wheeling a eA 5 he +: Child inthe New the cost to be p Folding Pushcart. the veteran whet Above Pushcart ‘ ] -} ] Completely Folded vines and orcnart 8 Carrying Like a to bear srief Case, and Half — - Folded, Showing How \nother new ; Wheels Disappear ad opt ed, was t from View When the | lve . . : . Cart is Completeiy udget of expense Closed made out by mont A three years ahead placed on the market in England It closely followed by is purchaser. The benefits derived fro designed for people traveling with chil- budget plan, however, have been dren, and can be taken into busses or remarkable, and it now has the he railway coaches like ordinary hand lug- support of all the veterans. gage. It is made mostly of aluminum, In addition to this economic trait and as it weighs only 14 pounds, may be’ the settlers are also receiving the easily carried . best scientific training and advice. N rally a large colony of this kind attr NOVEL FARMING EXPERIMENT attention. Experts connected with FOR WAR VETERANS government and private institution organizations are visiting the vet Sixty world-war veterans are trying an and giving them the benefit of the interesting experiment in California’s perience in poultry’ and hog famous Imperial Valley. This group men, injured during the war and now ot dairying, the raising of fruits and be- tables, tarm management, irrigaticn ing assisted by the U. S. government, chinery, in fact in every bran have taken peaceful possession of land near Brawley, formerly known McDevitt’s Project McDevitt was 1 Pisin os . » the farming as a the @ When the floor of a concrete rese! leader of a group of idealists who estab- started to crack before it was put lished a colony, hoping tor a perfect or service, the idea was conceived ot Utopian community life. When the colony failed, the Veterans’ effects might be known and reme Bureau, aided by the businessmen erating the cracking so that its of Ice and salt were spread over the 3rawley, decided to take over the land for a depth of 6 inches, then dra for its charges Under the plan worked out betwu away, the cracks opened with chise een then filled with a mastic compositi

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POPULAR) MECHANICS 861 ng of the 3,000 Camels to be Used in Carrying Railway Ties and Other Supplies for the New Rail- road to be Built in Australia from Oodnadatta, in the South, to Port Darwin, in the North DOUBLE GAS-MANTLE BURNERS _ in the case of the east-to-west transcon GIVE IMPROVED LIGHT tinental railway, which was opened for trafhe a few years ago, over 3,000 came eater lighting efficiency is claimed will be employed in the preliminary con new type of incandescent-mantle struction work. light, recently in- vented, which has twin burners. The PORTABLE RECEIVING SET gas inlet passes IS EASILY INSTALLED between the burn- \ portable, extremely light radio-re- ers, permitting ceiving set which can be put into opera- the gas to be- tion ‘by simply allowing some come heated by flexible insulated wire to lie radiation Irom on the floor and _ attaching the glowing man- another wire to a telephone or tles. This system ysadiator is being offered the is credited with a considerable in - crease in light, with only a rela- tively small in- crease in gas consumption. The ument is that the heated gas, reaching mantles at or near the ignition point, ive no cooling effect on the mantles. NEW AUSTRALIAN RAILWAY TAPS RICH LANDS e Australian commonwealth govern- announces that the new transconti Wx tal railway, from Oodnadatta, in the ™* ee ae ee ae ee et ae 7 to Port Darwin, in the north, will uilt through the richest mineral and public. The crystal, of the fixed type, i pastoral sections of the center of within a holder resembling a telephone ontinent. This will be the first step pedestal, while the earpiece is set at the plan to cover every section, includ- top. The usual means of tuning in ar the vast deserts, with railways which provided. The radius is from one to about not only facilitate commerce but also 35 miles Extra earphones may be a defensive barrier for the Aus- tached by a special extension in coastline. It is estimated that, as ment

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BRITISH ROADBUILDING EXPEDITION © GE LEO OLE OSE CNBR GI i GIO LDN RN SI RIE RE ERY REE age 2 RE PRE SIRS SRR I, ME CMG EM Dag AIO Gh OP Bi se ge I apg Se ee ee ee LL LE EERE MOL AGREE LRN LE PEER STE LLIN I AT Tags Ae ee ee 2 RTE SI. no “— Settling of a Fixed Frontie Policy has Always Been O of the Most Delicate of Problems Facing the Britis! Government of India. Recent ly a_ Roadbuilding Exped tion Began Operations fr Thal to the Tochi River in the Rasmak Plateau. Rasmak Is the Objective of Getting into the Heart of Wazirista Which has Always Been a Veritable “No Man's Lar between the British Nort west Frontier of India Afghanistan. Consequent! Comprehensive System Defense, by Soldiery, of Road Workers has B Necessary to Protect The against the Constant Sni of the Savage People, Mahsud Tribes, Who Inha This Wild Stretch of Ts tory and Resent the | croachment of Civilizat Above: The 56th Rifles A vancing as a Reserve U over a Section of the C pleted Military Road to Ra mak. Left: Sappers Miners Working on the R Camel Trains Supply Water and Crushed Ston ROY: se eae: eT. ee eee

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PENETRATES INDIA’S LAST FRONTIER CR AN et MER eee an a ee ee a . ros ees =e. Ree eae ee PORE oF a eee In Spite of the e of the Military the Mahsud Outlaw Continually Took Toll Workers. As a Means insporting Troops and ers Wounded in These ent Encounters, Cap- C. M. Stoker, M. C., in ge of the Work, Devised ecial. Type of Stretcher Attachment to the Camel The “Doli,” as the e is Named, is Here It is Made in Two s, and a Pair is Swung m a Support on the el’s Back. Right: A e Steam Roller Brought Delhi, Many Miles to South, being Employed Make a Road around a Corner. The Presence of Machine of Modern Together with the It is Aiding in Per- ng, Symbolizes to the Tribesmen the Advance Civilization They in No- Court. They Believe When the White Man Once Penetrated Their ntain Fastnesses, Their berty will have Gone oo we a a LS Ee cree SE © GA PI. A aT ee . Se ee ee ee pe BE Bin OE

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POPULAR MECHANICS KITCHEN GAS-RANGE BURNERS operates a plunger which opens tl LIGHT AUTOMATICALLY valve and admits gas to the burner it is ignited by a small pilot light moval of the vessel from the burne ically cuts off the gas suppl made to fit any stove, an substituted fo1 the ordinary but TAR-POURING KETTLE HAS ADJUSTABLE NOZZLES \n improved type of pouring just placed on the advantage ot using adjust able nozzles for pouring tar, thereby minimizing drippings and leaks fro fe the spout x ordineg g he flow desire Lhe outiet vaive away wit trolled from the handle, making it this feature, by lighting automatically to fill any joint in the roadway with vhen a vessel laced on a rack above mum drip, and the valve itself the burner he weig r the it burner, recently in\ does Is SO vessel to the nozzle that aids in this etfe aii | PNT _ Aes enna mit} seas { JAPAN QUIETLY MAKING ADVANCES IN AVIATION 7 ‘HE picture shows Akita, on he Jay anese flyi aces, and the plane, of native manufacture, in w he has made some noteworthy flight is 1 1 del as the most advanced in air craft of any Ch ina are a‘so showit progress Not only is aviation bei f also for ymmercial work and for sport

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POPULAR MECHANICS 865 NOVEL PORTRAITS MADE BY MULTIPLE EXPOSURE )ME interesting portraits have resulted from a method of multiple exposure which | differs from the ordinary process in that there is an overlapping of the various views | 1 no division line between them. .It is likely the pictures were made against a dull dark background and in a room where the only illumination was from one or two imps placed at the sides of the camera in such a way that light would be reflected ily from the sitter. Then, by making a time exposure near one edge of the film, the other portions would be unaffected and different portions could be successively exposed by turning the camera slightly before each exposure. MACHINE CUTS ICE CAKES TO STANDARD WEIGHT cut blocks of artificial ice into through the scoring machine. Rapidly of standard size and weight at the moving saws cut the blocks to size in vy, an inventor —__ 7 — two directions. Then a leveloped a ma- tap from the point of for scoring the the iceman’s tongs will blocks as they divide the blocks, thus from the re- Saving much time and rating machines. unnecessary waste. A the 300-pound block so divided, will, of ; come out of the course, also greatly fa ines they are run cilitate delivery. Ice-Scoring Machine as It Appears Ready for Work. Below: Left, Machine in Operation, the Ss aws Cutting Marks to Indicate Weights; Right, Blocks Chopped after Leaving Machine, Showing Clean-Cut Surfaces

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866 POPULAR NEW MILKING-MACHINE VALVE PREVENTS INFECTION A new devised stantly type of vacuum valve has been which automatically and_ in- closes whenever the operation of New Mi 1 king- Machine Valve, Which Closes Au- tomatically When the Cups become | Detached, Pre- venting Dirt from being Sucked into the Milk Supply we : a the hose line to which it is attached is interrupted. The valve is especially adapted for use with milking machines. When the cup is accidentally detached from the cow’s udder and falls to the floor, as frequently happens, instantane- ous closing of the valve prevents dirt and other impurities from being sucked through the hose into the milk supply, thereby contaminating an entire tank of the fluid. The valve opens as soon as the cup has tached to the udder. automatically again been at- ONION-“SET” PLANTER SAVES TEDIOUS LABOR The drudgery of planting onion “sets” by hand-is greatly lightened, if not en- tirely eliminated, by the use of a mechan- ical planter recently placed on _ the market. This device is con- veniently mounted ona This Is the Mechanical Onion-‘‘Set’” Planter, Which Is Capable of Planting from 15 to 25 Bushels of Sets per Day, in Rows 12 Inches Apart MECHANICS light four-wheeled frame, having t in- clined wheelbarrow handles for propelling by hand. A hopper with inclined botto; guides the young onion set into a funne spout, dropping it directly into the be, of a short furrow which has been pre- viously loosened up by a small spe tally shaped shoe just in advance of the spout outlet. The planter also has several justments for sets of differing size AUTO-WASHING DEVICE KEEPS SOAP SOLUTION UNIFORM : Garage workers realize the import ince of using a proper soap solution for y ing cars, knowing that an excess of soap r aside from being wasteful, will damage the car. A recent invention does awa with this difficulty by providing mecha ical means for properly dissolving th al soap. It consists of a mixing tank, | ing inlet and outlet valves, and a perf rated soap-holding receptacle which staat Ye ae Se Either Hot or Cold Water, or Live Steam may Used with This Soap-Mixing Device D« signed for Use in Cleaning Automobiles and revolved from the side of the tank after water has admitted. The piping is so arranzed live steam may be by-passed around soap receptacle and through the out in case soap has accumulated in the \ or clogged the perforations. be agitated @ Considering the title of chauffeu: jectionable, a New York organizatio: hired drivers of private automob which recently opened a $400,000 c! house, has named the club the Soc of Professional Automobile Engineer

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POPULAR MECHANICS 867 ) 1n- elling tton inne bed pre- lal], pout ad l- ' “PS ince ash ap lage ii ldN) the lay rf Cat f a Room in the Department of Agriculture’s New Moving-Picture Laboratory, Showing the Arrange- ment of the Lights and Camera: Note the Open Construction of the Room, Providing an Abundance of Light from Both the Skylights and the Windows FEDERAL FILM LABORATORY SIMPLE METAL PUNCH HAS % COMPLETELY EQUIPPED SELF-CONTAINED DIES ; Covering 10,000 square feet of floor A new portable metal punch of simple a motion-picture laboratory recent- construction uses no separate dies and lt and equipped by the Department has few wearing parts. The instrument, \griculture for production of educa- which weighs about 5 pounds, is provided matter is said to be the only gov- with punches for making five sizes of & ent film-producing and distributing holes, from 4% to % inch, in sheet metal of its kind. The fireproof brick ture, 90 feet long and 60 feet wide, he second, or top, story roofed with hts and fitted as a studio, while the floor has various rooms for opera- incident to the manufacture and bution of the pictures. all there are about 15 rooms or artments reserved for this purpose. e include offices for the title writers, e vaults, and compartments for de- ing, drying, and assembling films. ratus for slow-motion analyses and t whereby microscopic objects may ualized for portrayal on the screen, lete the camera equipment. om a motion-picture entitled, “Exit ris’—descriptive of a method for icating roundworms from swine—to oduction labeled, “Sentinels of the et’—showing the splendor of the ery in the vicinity of Mount Lowe Mount Wilson, in California—the now on hand depict almost every e of life in the countryside. up to ¥% inch in thickness, and will work to within 3 inches from the edge. In op- eration, the magazine die is revolved un- til the desired size of hole lines up with the punch, when it is secured in place by Showing Punch in Position: Note Circular Disk of Dies, ge below Punch Point, Which s a Feature of the Device a thumbscrew. A blow with a hammer on the top of the punch completes the operation. The device is so constructed as to make changing the dies easy.

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865 POPULAR MECHANICS OXYGEN-BREATHING APPARATUS WORKS AUTOMATICALLY A new oxygen-breathing apparatus that works automatically, even under water for a short time, is now being used by —_____—« the - Navy De- partment. The apparatus, which is self- sustaining for approxi- mately 30 min- utes under se- vere working conditions, consists of a steel cylinder, or flask, hav- ing a capacity of 134 cubic feet of oxygen under pres- sure of 2,250 pounds to the square inch. It is provided with control valves and a reducing valve for bringing the pressure down to about normal, a cooler in which the oxygen and inhalation air mix, a re- generator for absorbing carbon. dioxide, and suitable breathing tubes. STEEL-REINFORCED PLYWOOD APPEARS IN ENGLAND Ordinary three-ply wood, with one or both sides covered by a sheet of steel coated with lead or zinc, has made its appearance in England. The metal sheets are attached by a chemical process. The innovation, claims the manufacturer, pro- tects the wood, makes it fireproof, and in addition improves the structural prop- erties. Among the many ways it is ex- pected it may be utilized are for shelves and partitions in houses; in vehicles, for OIL-WELL FIRE SHOOTS A fire of terrific fury raged recently when an oil well in the Okotoks oil fields of eastern Alberta caught fire, and roared continuously for 38 hours. The well was of recent origin, and for two months prior to the fire had generated the enormous gas pressure of 820 pounds per square inch. The friction of small gravel stones, rushing through the casing body work of various descriptions, anq on farms for silos, and tanks. The ma. terial can be readily cut with a circular or small handsaw, and wire nails cap be driven through it without drilling, |) tests, it is claimed, the material was found to be at least 80 times as stiff mild steel. as CLOCK WITH ONE HAND AIDs IN AVOIDING ERRORS Designed to make the reading of tim: an even more simple matter, a clock wit one hand has made its appearance. By tween each of the usual hour markings eleven equal divisions have been made bearing num bers from 5 to 55° inclu sive, in mul- tiples of 5 dicating the minutes \ the han moves around the face, the point thus ir dicates t exact time The makers of the instrument point to frequent errors in telling time made because of confu ing the two hands of an ordinary « The new instrument is made up in fort suitable for use on automobiles, an watches and desk clocks. Onn He Groen : a 6. + Ava L- ze *\s s @The most powerful radio equip: afloat will be aboard the “Leviat! when the giant ship reénters transatlant service under the colors of the U. 5S Lines some time in June. The equip: which will be six times as powertu that carried by the average steam will provide for uninterrupted comn cation with points 3,000 miles distant 200 FEET INTO THE AIR under this pressure, is believed to | generated the spark which ignited gas. During the height of the fire, peak of the flames roared more than feet above the 87-foot derrick, and visible for miles in the surrounding c: try. An estimated damage of $30,(U) resulted from the fire, in addition to the enormous quantity of gas consumed

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e Illinois-Alberta Oil Well, in Alberta, Canada, So Named in Deference to the Home State of Most Its Stockholders: This View Shows the Spectacular Appearance of the Fire at the Height of the ames, Which Rose Fully 200 Feet into the Air. The Gigantic Jet of Burning Oil Roared Continuously for 38 Hours Before the Internal Pressure of the Well had Dissipated Itself

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870 POPULAR MECHANICS NEW MULTI-SPINDLE MACHINE AIDS PRODUCTION A new multiple-spindle drillin; reaming, and threading mac of the drum type has been signed especially to meet the re quirements of quantity production of parts like pistons, and bearing caps for automobile engines. machine operates continuously, and all the attendant has to do is to put in and remove the work which -is carried between two large flanges and held in place by a shoe upon which a cable bears. It is not an indexing ma- chine, as the spindles travel \ the work and are moved throug bushings in the flanges by a tionary cam. The machine actually working through tv thirds of the revolution, and it is believed that, with a special tachment for loading, small part Partial View of Multiple-Spindle Production Machine, Set Up could be speeded up to a produ for Drillin Wristpin Holes in Automobile-Engine Pistons, ° f peede I ut — a pri Which can 4 Seen between the Two Large Flanges in the Center tion of 1,000 to 2,000 an hou: PORTABLE MACHINE MELTS ASPHALT PAVEMENT the light motor truck o: which the equipment mounted, covers a 4 | 6-foot area of pavement to which it conducts t heat generated by an fired brick-lined furnac: extending along the t An auxiliary steam tor is used to move t machine back or ahe a few feet, while the asphalt is raked off Above: Pavement-Melting Ma- chine Mounted on Light Motor Truck, Which is Operated by an Auxiliary Steam Motor For the purpose of speeding up pavement repairs and reducing the cost, a portable machine that softens the old asphalt surface, which is raked off previous to laying with new asphalt, is being used by a west- ern city. A hood that Pavement-Repair Machine Which Carries an Oil-Fired Brick-Lined Fur extends from the rear of nace, Extending along the Top to the Overhanging Hood at the Rear

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POPULAR MECHANICS Ts bE, We es es res j " is so 2. Bee, . Side View of the New Trailer Truck Which the Old-Fashioned Oxcart. This Type will t Least Eight Times as Much Sugar Cane, Cost and with Greater Ease. Right: Both Ends Swing Outward, the End Doors ng a Standing Place for the Loaders SUGAR-CANE TRAILER TRUCKS REPLACE OXCARTS inroads of modern equipment on hioned, obsolete methods of han- ugar cane have resulted in banish- familiar two-wheeled cart, with wheels, drawn by oxen, and the tution of trailers. These are to be by tractors and are reversible, that can be drawn from either end, rin trains. In operation, the end ire lowered, forming a platform laborers, who pass the cane into ler, piling it lengthwise, the leaves previously been stripped from the The trailer body can be quickly ily tipped for unloading by hand and levers. Where previously a f only 3 tons of cane could be by oxen who moved at a speed of le per hour, a tractor now hauls ne to four trailers, each containing of cane, and moving at a speed of iles per hour. slight changes are made in the threading of the motor’s journal box. ROTARY BRUSHES TO AID THE HOUSEWIFE electric-driven polishing brush for n the home is the product of an en- ising inventor seeking to lighten the ery of polishing stoves, silverware, imilar articles. The brush is of the y tvp -s z z A Light, Easily Handled Rotary Brush Which Does TPS, Cons shaped, and can be fitted 9 “\i'®i. “Polishing with Litle Expenditure of motor of a vacuum cleaner, after Energy and may be Fitted to the Vacuum Cleaner

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A MILLION TREES FOR CALIFORNIA’S HIGHWAYS By H. H. DUNN HE motorist driving anywhere over The means for this systematic planting d the 6,000 miles of paved highways in’ was brought about by the establishmen; California soon will find himself pro- of the State Forest Nursery, near tected by the shade of lofty trees in sum- mento, as a result of the codperation mer, yet warmed by the western sun in the California Highway Commi winter, for the state, through its high- which purchased the land, and the Ca! way commission, is planting, as rapidly fornia State Board of Forestry, whi as possible, a deciduous shade tree every propagates and distributes the. tree 25 feet along both sides of every paved Thirty acres of land were purchased highway. This means that 1921, and seeds planted 1,267,200 such trees are to i\e and buildings and | Se wee) ~TF a

lat be planted to shade only No Vis, houses erected, which no the paved roads now com- LN 6s. contain several hundred pleted within the state, ) \\ SEART ¢ thousand trees, and }b while the annual increase | i’ eens midsummer, this year, wi in road building and pav- (Is f hold nearly 2,000,000 seed ing in California will near- * ” lings. The principal tre ly double this number by LIP bee" <oang —\ raised, after some experi the time the ten-year pro- [} te? mentation by the forest: gram of tree planting is i). board, are California bla completed. So far, over (lip walnut, European 200 miles have been plant- | . more, Lombardy popla: ed, and there are more than |} American elm, and blacl 200 miles already shaded 9), : locust, all of which s by older trees, set out by y) : 4 their leaves in the w farmers and other resi- | thus permitting the dents. In the cities and , €3 heat of the sun on t some of the smaller towns, \\\ highways in winter, the municipal governments \\ providing dense and have assisted in this tree de si.. growing shade in the planting along the main Nine QAKLA mer. highways, and it is esti- Natice Preference among t mated that approximately We five trees is gradually c: 300 miles more have been

Veeenegn tallizing around the added to the highway Ug se OBISPO nut, which is allows planting in this manner, \ (QAN grow about ten year thus giving a total of some Se then is cut off and gr 700 miles lined with trees “= WSS & with English walnut now giving complete or sulting, in four years 1 partial shade. in a tree which has a

— il 2 = ——— A Typical Bit of Paved = —* in the “Golden State”: Within a Few Years It will be Lined with Sturdy Shade Trees, ow being Set Out by the State. Above: Main Pacific Coast Highways Soon to Boast a Continuous Border of Trees

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POPULAR >, SS SS eesti Vr ~*~ f.. Ss _—~ MECHAN NICS SS) \S yh nh ig ey Uh » RSS Mee Sie es en >, al h silt if- SS ~S Interior View of a Part of the State Nursery Where Thousands upon Thousands of Tree Seedlings are being Propagated : Later It is Planned to Provide Farmers with Seedlings So That They may Plant Windbreaks and Decorative Groves hade-giving properties of the wild walnut nd discards its leaves in winter. Besides sing trees for the highways, the nursery ;o provides ornamental trees and shrub- bery for the state parks, and the grounds of state-owned buildings and institutions. rhe plan of planting the highways is perative, and involves three separate gencies—the California State Highway mmission, the California State Board of Forestry, and the agency, organiza- yn, or individual which applies for and its out the trees. As soon as an ap- ation for trees is received from a county, city, automotive, or civic asso- ciation, or other organization, it is re- ferred to the Highway Tree Planting Committee, which consists of three mem- bers, namely, the state highway engineer, e state forester, and the gardener of the Capitol Park, at Sacramento. This committee makes a plan for the section of ghway to be planted, giving the species of tree 10st suitable for use there, and indicating the best method of planting. (hen a planting permit is issued by the State Highway Commission, and stakes marking the location of the trees are set by experts from that commission. The trees are furnished ready for immediate transplanting by the state nursery, and the applicant bears the cost of transportation, planting, and supporting of the trees by stakes. After the trees are planted they are cared for and maintained by the State Highway Commission, which replaces any that may die. The state forester super- vises this work. The response to this plan has been widespread. In 1922 the state nursery was unable to supply the demand for trees, and indications are that this year, though the number of trees ready for planting is far greater than last year, there will not be enough to supply the demand. Chambers of commerce, boards of supervisoazs, city councils, women’s clubs, and other organizations have asked for trees, and the states of Washington and Oregon are following California’s lead in this praiseworthy undertaking. What the Result will Be After the Years have Brought the New Planti to Mature Growth: A View along an Old Highway Now Properly Pav

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POPULAR EGG-SHAPED CULVERT IS SELF-CLEANING It has shaped been are long sewers known that egg- self-cleaning, if laid with the nar- row end at the bottom, but a manu- facturer has now applied that principle to culverts. The small bottom con- centrates even a ‘small flow, giving greater depth, and this has the effect of in- creasing the velocity and reducing the likelihood of deposit. This type will re- tard the deposit of silt or mud very effi- ciently even where the slope is not great.

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HYDROELECTRIC PLANT. RUNS WITHOUT ATTENDANTS No attendants are required at a new water-power plant built on the White River, in Indiana, operating two turbine- driven generator sets, each of 340 horse- power. A dam, 345 feet long and 10 feet high, makes available an adequate flow for the turbines. A feature is the auto- MECHANICS matic control of the generators, are actuated by float switches. will automatically cut units, and high water will as prom; start it again. In addition, all the b. ings of the machines are equipped heat controls to prevent serious inju An overheated bearing will automatic wl out one of shut down the plant before permanent damage results. Adjoining the po house is a so-called fish ladder, which per- mits fish going upstream to pass the d through an ascending series of poo! NEW EXPANSION TURNBUCKLE HAS POSITIVE LOCK An adjustable expansion turnbuckle one of the clever and useful devices cently patented. The turnbuckle mains positively locked, when shut means of expansi-< lever whi- also serves a wrench making justment The devi has the length right and left hand threa: Low water Same oT all of the advantages of the usual tur buckle, and will fit in the place of t usual type. parts riveted to an eccentric, of which t expansion lever is an integral part

A Self-Operated Power No Dons rnishing Plant = Apparatus Controls Are Automatic, Fu Safety by Shutting Down the Plant Before Any Permanent Damage can Result to the Equipment

Re wy Periodic Inspection and Lubrication: All Power According to the Water Level, and Insuring The buckle is made in tv the

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POPULAR MECHANICS TRANSMISSION LINE =... ¥ a = POWER PLANT LANDING FIELD ACQUAINTING THE AIRMAN WITH THE LANDING FIELD THE municipal landing field at Hartford, Conn., is here shown as pictured by an Army Air Service camera- man and interpreted by the airways section of the service, in the form in which it will be issued to airmen flying to Hartford. The held is located on a bend of the river just south of the city, which boasts other landmarks that are plainly visible to airmen. For safety's sake, attention is specifically directed to the power ne and towers, which form dangerous obstacles for the flier near the field unless he is aware of their location. The field is identified by a circular marker, 100 feet in diameter, composed of a 4-foot band of crushed stone made more conspicuous by whitewash. WORLD’S-TIME CLOCK FOR RADIO PURPOSES \t the immense new central transmit- indicating the approximate times at any g¢ station in Berlin, it was imperative given moment. The entire device, mov- tthe sending operators shouldknowthe ing across the shaded area, eliminates t time in any other part of the world need for calculation by the operator. agiven moment. —__ ; a oo me form of clock was fF sund necessary, that uld indicate day and ht, and = simultane- sly indicate the time all other important lio stations through- it the world. A map of e world was therefore iced on a circular glass il, on the outer edge which two 12-hour iles were graduated at minute intervals. This dial, being darkened ound half the edge, to licate where it is night, | moved around by lockwork. Arrows ex- tend fro stati on tl m the stations Transmitting Station Knows at Once Just What Time It Is n the map to the edge, at Any Other Important Radio Station in the World

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876 CAB TOP ON TRUCK LOWERED TO CLEAR LOW BRIDGES In use in Great Britain, but of Ameri- design, a can motor truck is so con- POPULAR MECHANICS AIR SERVICE PREPARES MAp FOR AIRMEN’S USE A new map which places before airman practically all the desired i: is flying over, has jy ers, railroads, highway in different a suitable indication importance. Various grees of ground ek tion are designated various shadings color. Small purple d denote landing fa ties, on which sket: are found along the | Radiator of a Truck. structed that the cab top can be swung forward to the front of the radiator to enable the truck to pass safely’ under low bridges. Two triangular side supports, connected with the cab top, flank the sides of the cab, to which, at about the level of the driver’s seat, they are pivoted. Between the dash of the cab and the front of the top is a hinged windshield that folds up when the top is swung forward, till it comes to rest in a position no higher than the driver’s head. MICROMETER TAPE MEASURES DIAMETERS A new tape has been produced for accurately measuring the diameter of ma- chine parts, like the pistons of gasoline engines. It consists of a flexible steel band that is wrapped around the object to be measured, and gives a reading di- rect to the nearest one-sixteenth of an inch, and to the nearest one-thousandth of an inch by means of a vernier scale. 73 Right: Obtaining Piston Diameter with Special Meas- uring Tape. Be- low: View Show- ing Tape Extended a ‘ | The Photograph to the Left Shows the Cab Top Swung Down over the To the Right, the Top Is Again in Place der of the map, whi purple crosses desig: landing facilities which no sketches are available. name of a town underscored means there is a large building near the road, on which is the name of the t MINIATURE COPPER KETTLES MADE FROM COINS An example of skill and patience, the ease with which copper is wot oat Clever Manipulation and Painstaking Care Necessary to Produce This Set of Kettles, Each Made from a Copper Cent is afforded in a group of miniature kett each of which was hammered fro copper penny. The smallest is %4 1 in over-all height, with a diameter at t base of 4 inch. @A government wireless stations probably at Grays Har! Wash., and at Anchorage, Alaska, planned to supplement the service to t! territory now given by the army navy. system, mation regarding the character of country he been developed by the Airways Section of th Army Air Service. Riy and towns are marke colors wit! their class and relative

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Concrete. PHILADELPHIANS BUILD “SILENT” Section of the New Frankford Elevated Line in Philadelphia, in the Building of Which Every Effort was Made to Provide against Noise When the Line should Be in Operation: The Flooring Is Supporting Posts are Resting on Concrete Foundations ELEVATED LINE By Wm. A. MCGARRY HE “silent” elevated railway, or something approximating it, has been achieved in Philadelphia. That city just completed and opened to the public a 6%-mile stretch of high-speed transit line that is held by engineers to be the quietest in the world. It is also of interest by reason of the advance it marks in the adoption and use of me- chanical safeguards against accident. Che first contract for the work was let 1915, and when completed, the aggre- te cost of the line was $15,000,000. Of s, $3,000,000 alone was spent on cars. Quiet operation has been achieved uite simply from the point of view of engineer. The methods used repre- ent a forward step in comfort and ealth. Pedestrians may converse with- it effort while a seven-car train passes verhead at full speed. There is a noise, but it is more like the distant boom of a ¢ gun than the familiar high-pitched tter of a passing train. In the Frankford line, two major de- lopments were made on the structure elf in addition to the improvements in e cars. The first was to fill the. inter- tices of the H-beam uprights, on which he road is carried, with concrete. Vari- ous experiments have shown that such beams act as sound transmitters, carry- ng to the pedestrians vibrations that otherwise might have been dissipated in the air above. The second change was in the support for the rock ballast in the roadbed. Instead of using the familiar bolted latticework of steel, the engineers put in concrete arches. The result was General View of the Interior of One of the Stations on the New Philadelphia Elevated Railway: Entrance to Platform Is from Upper Level 877

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878 POPULAR MECHANICS a structure almost as solid and vibration- proof as masonry. For about a mile near the terminus, the line runs through a part of Frankford Avenue, which is so narrow that a center- column structure had to be used. Even here the engineers managed to attain an unusual solidity. A special type of col- umn was designed, supported below the street surface by plate girders that in turn rest on concrete piers 12 feet apart. The result has been a considerable dead- ening of noise even when the old-type cars are used. The new cars are similar in some re- spects to those in use on the later lines in New York, but they have some addi- PORTABLE INSTRUMENT GAUGES TANK CAPACITIES A portable instrument has been in- vented and marketed recently which quickly and conveniently determines the capacities of - large tanks of irregu- lar shape, without spe- cial measure- ments and cal- culations. The device is mounted on atripod,andis equipped with a stop watch, and in- let and outlet valves. In use, the in- strument is placed over the manhole of the tank to be calibrated, and a suitable nozzle, whose rate of flow is known in advance, is fitted to it, whereupon water is turned on. When the tank is full, the elapsed time is carefully noted with the stop watch, and the total quantity of water passed is determined from a set of tables. FREEZING BEFORE FORCING IMPROVES RHUBARB Recent experiments have shown that rhubarb of exceptional tenderness can be grown from roots that are allowed to freeze before forcing their growth in a warm, moist atmosphere. The explana- tion is that the plants do better after tional safeguards. Fully automatic « lers were installed, the use of which only eliminates the necessity of br between the cars trains are being made up in the y but also equalizes the speed of each men standing so that the train acts as a unit. It m for less noise and more comfort. Anot step in that direction is dual contr: the air brakes, one of the old type, the other electrical, the latter being stantaneous. the motorman In the old equipment, applied the brakes, first car in the train was the first to down. first, and of the train. The second car bumped into so on throughout the le: undergoing a rest, and that freezing vides the necessary dormant period ing which nourishment is stored. plants can be packed in moist sand grown in a warm cellar. While the ity of the stalk is the same for p grown either those small leaf. in grown in the dark or the the dark have a RADIO HEADSET HAS WIDE RESISTANCE RANGE The so-called “cracking” or rattling the diaphragm common to most ra telephones is eliminated in a new typ headset, w! uses a fi pole, ins of the ust two-pole structi This affor resistat range of | to 4.000 o} making suitable the high sistance fou in a vacuu tube set well as for the low resistance of a cr set. The poles of this improved head are slotted their full length, in quart: improving the tonal reproduction @ Oil-burning ocean vessels without la ] funnels are said to be regarded ske} cally by Russians, Poles, and their neig about to bors, when United States. spite of explanations, they insist on usi! emigrate to t More often than not, boats with smokestacks ; A Sh Bei

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POPULAR MECHANICS 879 A View of One of the San Francisco Coal Docks, Showing the ~ Towers Lined Up for Duty: Being Mounted on Rollers, They can be Shifted About Easily ROLLER-MOUNTED TOWERS UNLOAD COAL SHIPS Unusually heavy shipments of coal and coke coming into San Francisco by steamer made necessary a change in the design of the coal-handling towers in order to speed up the unloading of the ships. These towers were so heavy and umbersome as to be moved only with great difficulty. It was decided to mount each of them on six heavy steel rollers make them more easily portable. The lers used were 8 inches in diameter and feet long, grooved deeply around eir circumferences to receive the bear- ng of the tower supports. Iron bark, ne of the heavy and tough woods, was used as bearing material. A steel plate, well lubricated, lying between the two parts of the bearing, permits it to be wiveled like a chair caster. RADIO AND PHONOGRAPH SETS IN TABLE LAMP Ingenious adaptations of radio outfits continue to appear on the market, one enterprising inventor having fitted up a table lamp to include both a radio set and phonograph in its base. No aerial is required, as the lamp is made of copper; neither are batteries necessary. One of the special features of the outfit is the use of a magnetized diaphragm, built like Close-Up of the Steel-Roller Bearings, of Which Six are Located under Each Coal Tower: Details of the Swivel Arrangement may Also be Seen a camera shutter, which can be opened or closed in order to vary the volume of sound. A door on the lamp base con- ceals the interior, thus effectively hiding the inner mechanism. Right: Combined Lamp, Radio Set, and Phono- raph, Said to Be the First of Its Kind Invented. ft: Magnetized Diaphragm for Varying the Sound

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PEARL FISHING OFF WESTERN AUSTRALIA Group of Pearling Lug- gers Anchored outside Broome, on the North- west Coast of Australia: In the Town One Finds Asia and the East Indies Fully Represented; for of the 2,500 Total Popula- tion, 1,500 Are Colored Aliens, and Mostly Em- ployed in Pearl Diving } These Pearl. Are of Various Grades. O Qualities Being Equal, the Nearly Spherix Symmetrical Pearls Are the More Valu at Some of the Ornaments Carved from the roques,”’ or Irregularly Shaped Pearls, are A Shown One of the Divers About to Descend: Upon His Reaching Bottom, a Basket will be Lowered to Him for Use in Hauling Up the Shells. The Diver’s Pay Is in Proportion to the Number He Collects. ome 120 Feet Is Usually as Deep as He Dares to Go. At Any Depth He can Stay under Water But a Short While % soaks

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JRESQUE AND THRIVING INDUSTRY Certain of the Shells, When Opened, may be Found to Contain a “Blister,” as Shown to the Right. This may Cover a Valuable Pearl or, More lf Often, a Misshapen One. Above: Close-Up of a Blister Whether or Not Pearls are Found, the Shells are Brought Ashore. The Pearlless Shells are Later Exported to Cities throughout the World to be Made into Pearl Buttons of Various Descriptions From the Boats, the Pearl Baskets are Carried on the Shoulders of the Brown Men to a Stand Where They are Sorted. Sorting is Usually Done in the Afternoon, Whereas the Diving is Best Done from Sun-Up to Noon

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882 POPULAR WATER-SUPPLY INTAKE LINE FLOATED INTO POSITION Floating into position 1,500 feet of 14- inch pipe in a continuous length com- posed of 30-foot sections, was an interest- ing piece of construction successfully accomplished in connection with a re- cently completed irtake for the water- supply system at Peoria, Ill. The Illinois River at this point flows through a chan- nel that is 22 feet deep 20 feet from the shore, but owing to the water received from the Chi- cago Drainage Canal, the stream overflows a flat, formerly a corn- field, to a depth of 342 to 4 feet, and forms a shore line 1,500 feet from the edge of the channel. The first step in the installation of the pipe line, which extends from a concrete pump pit on shore to a point just beyond the edge of the main channel, was the construction of two barges, 12 feet = -_ long, 4 feet wide, pre we ed =. and 2 feet deep. The which barges were then con- nected by 4 by 6-inch timbers which held them 30 inches apart. On each barge was erected an A-frame. Across the top MECHANICS Rolling Last Length into Position for At- 1,500-Foot Pipe Line is Shown Floating on the Water of the A-frames was fastened a to the center of which was attac!} an eyebolt for the suspension of a Ait hoist. Then, near the shore and in lip, with the concrete pump pit, were ; two bucks similar to the ordinary buck. The first length of pipe, the end of which had been closed wit! blind flange and chained to the _ beams between thy barges, was allowed to rest on the bucks, while a second length brought from and bolted to its ope end. When this completed the s« length was pushe ahead onto the buck and across the barg: out into the strear The process was re peated until the barg were 1,500 feet fr shore and the pipe lay floating on water with one er chained to the bar and the other resti on the bucks. Und these conditions it possible to anchor barges over the desir¢ intake location, after removing the bli: flange, attach a suct length consisting of a swivel elbow strainer. The shore end was then t from the bucks and bolted to the pu il ed iced ene re RY Workmen Bringing from the Shore, at the Left, a 30-Foot Section of 14-Inch Pipe to Connect to the End of the Intake Line aeating, on the Bucks at the Right: The Line Floats with ts Outer End Chained to Barges “er eatuat = = . we nt 4 | (RR ees

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Leica A POPULAR MECHANICS e: The Rear at f the Car Swings urd, —_ ey | a vartment for wo Tires. Right: A View of the Auto- le Which is Be- i to Embody the t Development in ntific Streamlining. Car was Designed Collaboration by h and English Engineers 883 Entrance is Gained by Lifting a Side Panel PROTOS BY MEURISSE, PARIS n, with the joint cracked sufficiently rovide for a vent. By lowering on hain hoist attached to the A-frames e barges, the whole line gradually until it rested on the bottom. An- composed of two 1-cubic-foot ‘s of concrete joined by a chain, placed at 100-foot intervals along line, and thus the pipe finally im- ed itself firmly in the muddy bottom river. NEW TYPE OF FRICTION CLUTCH ENDS JERK provements in the wood-shoe fric- clutch are claimed for a new type ntly brought out in Germany. The h features a_ specially designed, ly elastic S-spring inserted into the ping mechanism. This, by reason of great resilience, is said to overcome jerk when the clutch is engaged, avoiding breakage of the clutch it- as well as the machine controlled it. Moreover, the new clutch is itly reduced in size and weight, and clamping pressure, in the dead-point tion, is only slightly in excess of what when the clutch is completely thrown The special spring also enables the tch to be thrown in readily under any } STREAMLINING CUTS DOWN HEAD RESISTANCE Concentrating their attention on scien- tific streamlining, Franco-British engi- neers have designed a most unusually shaped automobile which, they believe, will prove very speedy, since head. resist- ance to the wind has been cut down con- siderably. The body is built of duralu- minum, a new light alloy, and aluminum on a system like that used in making air- plane fuselages. The under part of the car is incased in sheet aluminum, only the brake drums and axles projecting. Entrance is gained to the car—powered by a six-cylinder motor developing 200 horsepower—by a side panel, and by a part of the roof and a section of the fender being hinged and, so, easily raised. The entire car weighs only about 3,000 pounds. @ Experiments in growing rubber trees are expected to be the first concern of the Department of Agriculture on its test farm at San Diego, Calif., land for which has been chosen and a lease asked from the city by the government. The new station will propagate many foreign plants used in various industries, and con- duct experiments for the purpose of dis- covering rubber substitutes.

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CURTAIN OF WATER FIRE IN BY Cl N effective method of extingui fires that occur in oil that is st in large open-top tanks, recently de: strated that a fire of considerable portions could be quickly put out curtain of water properly applied. features of the method lie in water tributors and their arrangement for « ering the surface of the burning oil an unbroken sheet of water that prev air from reaching the source of the The action of the spray nozzles is sisted by mist formed from the im; of the fine water jets against the s of the tank and by some of the v being converted into steam due to heat from the burning oil. The water distributor, which is 1 of heat-resistant metal, consists 0! nozzle with an orifice restricted by m« of an inverted conical-shaped disk ‘ a threaded stem that is screwed int cross rib through the central openin the nozzle body. Several small | through the stem and outer face of conical tip provide for additional jet water. This type of nozzle produc: high-velocity spray that forms a

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QUICKLY PUTS OUT OIL TANK ter radiating out from it in a hori- | direction. one of the tests, the flames from lons of oil which had been burn- five minutes, were extinguished ; than five seconds with 25 gallons of The accompanying illustrations, e order they are numbered, show l-tank fire which had been burning ‘ur minutes; the fire just after the had been turned on and the cur- of water had extended over the sur- of the oil; the action of the water in in checking the fire, two seconds the sheet of water had spread over re, which, it will be noted, is prac- out; the effect three seconds the appearance 10 seconds later, he water issuing from the nozzles tly after the pressure was shut off. (Stating that the development of aerial | submarine sound generators offers a re field for scientific effort, a member he National Research Council’s com- tee on acoustics has proposed an perimental ship to be equipped for re- rch in this phase of marine physics.

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| | A Construction View on the Banff-Windermere Highway, Indicating the Mountainous Nature of the Country In the Left Foreground a Portable Bucket Loader can be Seen Elevating Material from the Roadway and Depositing It into a Wagon for Removal LAST LINK IN 6,500-MILE HIGHWAY COMPLETED ITH the Canadian Rockies, future, the last link in a 6,500-mile chain of scenic roadway will have been welded into place, making an unbroken circuit from California to Canada and re- turn. Thousands of Americans will, no doubt, be attracted by this tour, as it through Grand Cafion Park, Yellowstone Na- tional Park, Gla- cier Park, and the Shuswap Indian Reserve in west- ern Canada, and traverses part of a most picturesque country. From Macleod, in south- eastern Alberta, a “rectangular” route can be covered, in- 886 passes official Banff-Windermere Highway in the scheduled for the near By E. M. WEBBER opening of the’ cluding the Banff to One side of beautiful Windermere, the @ LAKE LOVISE ROUND TRIP — 567 MILES eee Sce,2 on: om ROCKY MOUNTAIN vere. NATIONAL! SPARK ~ wn SU ies “i ? ° Kon ea BRITISH RTA rectangle A Scenic Route for the Motorist Who Enjoys Beauty of Mountainous Country: Banff Is the Northwestern Corner of the “Rectangle” the in link f: complete runs nort! from Macle: crossing m streams, throu Parkland and napore to Calg Here the r:¢ makes a grt winding turn generally west direction tow the wonde: country surrou! ing Banff. Aft leaving this town the road begins to run so! ascending past Sinclair P w hich divide Brisco and St ford ranges. milion Pass, highest point the trip, is ahead with an tude of 5,376 i The fourth southerly side 93-mile just ste

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On the Road between Banff and Lake Windermere, near Radium Hot Springs: Towering Cliffs Flank the Highway That was Literally Blasted Out between Them [Sy

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888 POPULAR MECHANICS the rectangle begins after Fort Steele is southwest. Every part of this 567- passed, near Elko. Here the highway circuit passes through regions of swings sharply to the north, as if it had natural beauty, and the motorist ca: lost its sense of direction, but, recovering but feel well rewarded after making at Michel, it turns east, making a sharp round trip. The route is conceded t “corner” again at Pincher, and reéntering one of the finest in Canada by Macleod, the starting point, from the familiar with its scenic highways. OIL HEATER USES SEPARATE COMBUSTION CHAMBER The necessity of | with firebrick or cla fire box of oil-bur oilers and furnace eliminated in a new of burner which uss separate combust chamber. An additio: | advantage of this bur: is that combustion is calized and intensified the separate chamb having the effect of 1 fling the roaring nois¢ burning oil. A mot driven air blower mai: tains the proper air-to ratio, and a centrifu type of oil governo: mounted on the blo shaft, controls the feed. If the curre: should fail, the m would, of course, —— ———.__ causing the weights The Separate Combustion Chamber Is the Small Cylindrical Tank Directly the governor to dro in Front of the Heater. A Rheostat on the Wall, Connected to the Temper- losing the oil vaive ature Regulator, Governs the Speed of the Motor Running the Air Blower C/OSIN§ the ol vaive NEW DEVICE LOWERS VOLTAGE FOR ARC WELDING A new device designed for using arc- volt direct current, such as is avail welding apparatus in connection with 500- on many electric railways and in s industrial plants, « sists Of a resistor-rea that operates in con: tion with a potenti eter. The potentiomet voltage, minus the voltage, determines dropping -out volt which may be set at s such value as 30 or 40 means of special re ance and adjusted t fraction of a volt. It said to maintain a re ble 44-inch arc witl objectionable fla ing and the resultir Two Views Showing Opposite Ends of the New Resistor-Reactor That perates in Connection with a Potentiometer to Reduce Direct- Current Voltage to a Value Suitable for Arc Welding crater.

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These Panels Easily Convey the Impression of Vigorous Outdoor Beauty. They are Molded in Appropriately | Colored Cements, and Adorn the Studio Garden Wall of Charles Cary Rumsey, a New York Sculptor, at His Estate in the Wheatley Hills of Long Island. Note How Well They Harmonize with Their Setting COLORED FIGURES ADD LIFE TO CONCRETE WALLS By ARTHUR JONES ECORATIVE panels for concrete ful Grecian dancers, vigorous animals and walls on suburban estates may be _ flying birds. The first problem he had developed to such a point as to form a_ to solve was how to put the colored st attractive feature. This conclusion concrete into molds. He determined that was reached by the relief must New York iam mem ~=Ssébee: sim lee and sculptor, ff _ — Charles Cary Kumsey, after making ex- tended experi- ments on his own estate in the Wheatley Hills of Long Island. What ould other- e be bare nd unattrac- tive gray walls re tran sS- med by the gic of col- ors and lifelike broad and not too sharp. One of its special charms must come from a softening and blurring of the outline through the peculiar rough nature of the concrete. In making the panels, the sculptor has used many colors, that is, each panel ' — ig: RY 1 figures into or- is in a differ mental fea- This Panel Is in Relief, and Illustrates How Effectively Colored ent color tures that add Cements may be Used for Tinting Molded Figures. The chen Oo f Ss that ade Sculptor has Used Birds to Produce an Outdoor Effect scneme n ¢ eatly to the panel, for in- beauty of the lawn or garden. For the stance, is in black and white, another walls of his estate, the artist selected for in light and dark blues, a third in con- panels and borders the figures of grace- trasted greens, and so on. Wild horses, RRO

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R90 POPULAR MECHANICS “teat Flying Birds, Leaping Beasts, and Dancing Nymphs Are the Effective Mediums Which the Sculptor has U The Vigorous Action Portrayed in the Panel to Add Color and Life to the Gray Walls. Is in Keeping with Ifs Surroundings, Also Supplementing Its Beauty bulls, giraffes, —are vividly motion in appropriate pelicans—all in portrayed colors. Just how well these colors will stand exposure remains to be _ seen, though one panel that was built four years ago, has, so far, shown no deterio- ration through weathering. EMERY-WHEEL ATTACHMENT FACES VALVES The need of special and expensive grind- ing machinery for the facing of valves is eliminated by the use of a simple emery- wheel attach- ment which is about to be placed on the market. Valve and stem are supported ina small bracket easily at- tached to the grinding- wheel frame, and vertical, horizontal, and rotating adjustments are provided to bring the valve face into proper contact with the emery wheel. A _ sheet-steel safety guard envelops the wheel and keeps the grindings within bounds. ONE-SHEET WRITING PAD MADE TO LAST “INDEFINITELY” A small writing pad which can be u ‘indefinitely” without renewal has be patented recently. The device is made a sheet of cardboard covered on its up; side with a blue-wax composition. Ov the wax is a sheet of strong tissue pap: and on top of this a sheet of a transpare: substance resembling celluloid. This 1 per sheet, when written on with a blu instrument, causes the tissue paper stick to the wax, making visible the w: The i, ae. Writing Pad: Lifting of the C ap tral Tissue- er Sheet Causes the Writing on the Celluloid Top Sheet to Disappear ing. To “erase,” the tissue paper is lift: off the wax, neither retaining any 1! pression.

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POPULAR MECHANICS 891 HENS REGISTER EGGS WITH NEW DEVICE may now “write” their own egg- forward the space of one impression. The egg rolls down into a small trough ex- records by means of a device re- invented. It con- a trap nest in- d in a sheet-iron 36 inches long, 14 es wide, and 20 high. The record- ichment is a rub- imp bearing the ame or number, is fastened to its by wire loops. the hen enters the the stamp rubs t an ink pad. As en advances a few farther, the stamp an impression on p of paper running two rolls. Imme- y beyond is the of the nest proper, and as this is tending from the base. The arrange- ed, the paper is automatically moved ment permits accurate check by the owner. Left: Hen Entering Egg Register; Note How Stamp Attached to Its Back Rubs against the Paper. Right: Side View of Nest, Showing Tray in Which Eggs are Collected MINING ALABAMA COAL WITH STREAM OF WATER the first time in Alabama, hydrau- expensive, consequently a small steam- ining of coal has been resorted to power station was erected near an \lco, for loosening breaking down the | of a surface de- eliminating con- ible hand labor. In case, stripping op- erations with machinery ld have been too adjoining creek for pump- ing water to the coal site Cast-iron pipe is used to bring up the water, and a stream of great force is shot against the bank, loosening the coal so that it can be handle easily. This system has been used with great suc- Al ve: The Force of a Stream of Water under High Pressure is being cess for mining opera- “sea to Break Down the Bank of This Coal Deposit, Making It Easy . 5 i : to Handle. Below: A Section of Cast-Iron Pipe, Conveying the Water tions elsewhere

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ll r; Gir ; s dla FE Ee Bteio cc rm a ! om gf eo as | $348 cual 98 998 8 aie 918 viel Bis syne sd dee ddale sue ged 8a a2) - $s ae p rer pet tre Gd : | pleat: pod ‘ Ae) 3 (aa 198 daa st awa val al 25545 434 iy lies a — Elis wt htg yy mith yan 4 t+ . . ’ a: | oe oe —

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UNDERGROUND PARKING SPACE FOR HOTEL GUESTS By H. S. GRASSMAN unusual innovation in hotel con- A truction characterizes the plans for addition to the Edgewater Beach in Chicago, ground for which has y been broken. The site, one of { oicest in the city, extends through Sheridan Road, a popular drive- to Lake Michigan, affording a wide over the lake’s waters. In keeping the nature of its patronage, largely resident character, the hotel man- ent has devised an unusual scheme ding to the structural convenience entire layout. Between the exist- ructure and the new addition, hid- underground, a large parking space. orage area for the guests’ automo- vill be laid out, covering about two- of an acre. Entrance to this terranean garage will be through a et-level portal on one side of the structure, and a tunnellike drive- 70 feet long, will pass under the ling, running level a bit, then inclin- lownward and into the underground area. From the surface no trace will be evident of this unusual feature of hotel construction. To the eye, there will be visible only the wide beautiful plaza which will span the space between the old and new buildings, and the low con- necting structure which unites them. The latter is shaped like a cross, one arm being a passageway floored with art marble, and the other arm containing a lounge room and a conservatory. The conservatory fronts on the lake, the en- trance from that side being a terraced plaza. Between it and the lake a marble dance floor will be laid out, for outdoor dancing in the summer. In conformity with the appointments and fittings of the present structure, one of the most attrac- tive hotels in the city, the entire pro- gram calls for an establishment of lux- urious comfort, unusual conveniences, and striking beauty. The entire plat area is almost five acres in extent, and permitted the designers a wide latitude in its architectural possibilities. DRYING UP OF OWENS LAKE REVEALS NEW WEALTH Owens Lake, one of the great inland of California, located in Inyo County in that state, is rapidly shrinking depth and area, and is doomed even- tually to disappear. Maps printed per- within another decade will indicate the former location of this picturesque desert sea by a dotted line, and in the of the lake will be located numerous soda, and potash plants, forwarding trainloads of these valuable materials into the avenues ‘of commerce. he disappearance of Owens Lake is he inevitable result of one of man’s great engineering enterprises—the utilization for irrigation purposes of the fresh water upplies which originally served the lake. though lying at an elevation of 3,569 et, this body of water has no outlet. llowing some prehistoric upheaval of > earth's crust, the Owens River, which nade up of innumerable streams trick- down from the mountains, was reed to discharge its waters into the mense basin formed in the Mojave Desert, and the resultant sea is now known as Owens Lake. Although fed th fresh water, the lake, having no outlet, heretofore lost its waters only by evaporation. Its level has been main- ned by the balance between the rate salt seas of evaporation and the amount of fresh water flowing into the lake. Naturally the water is very salty. Sut that balance is now destroyed. Aside from the taking up of the little feeder streams by the irrigation of farm lands in the semiarid Owens Valley, by the building of the Los Angeles aqueduct the Owens River was taken away bodily through 286 miles of steel pipe and open ditches into the city. Such inroads upon the supplies of fresh water draining into the lake make the rate of evaporation far in excess of the quantity supplied. The level of the lake has fallen about 20 feet. With the receding of the lake, its waters have become increasingly saline. A number of salt, soda, and potash plants have already sprung up around the shores on locations that formerly were part of the lake bottom. These plants are now doing a profitable’ business. When the lake will have disappeared en- tirely, it is estimated that some 500,000,000 tons of salt, soda, and potash will be available. @ Following a decision to expend $20,- 000,000 during the next 10 years, on im- provements to the Suez Canal, the chan- nel will be deepened at once from 31 feet to 32 feet, and as soon as possible to 35 feet. The banks are to be 200 feet instead of 150 feet apart. 893

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894 POPULAR Latest Totem-Post Addition to Harvard’s Museum: These Posts were Carved from Cedar by Means of an Instrument a. an Adz. The Figures have to Do with Legends and Stories of Now MECHANICS anished Tribes. NEW TOTEM postr ADDED TO HARVARD MUSEUM The Harvard Co Indian Museum come into possession oj a totem house post f{; the Kwakiutl In tribe in the Northwest of Canada. This house ornament, together the two house posts pr viously acquired, for one of the most va able additions to the lection. It stands ab 17 feet high, with upper part carved to r semble an eagle po for flight, and weighs approximately two tons A legend tells that ancient tribal leader erecting a house whe: “thunder bird” alight nearby. From the bi: neck appeared a n who helped the tri! man erect the tot posts used in buil the lodge. AUTOMATIC GRINDER FOR LAWNMOWER BLADES has has almost machine which An interesting grinding been devised recently, An Automatic Grinder for Tool and Lawnmower Blades: To the Left the Machine Appears Complete for Grinding Mower Blades; to the Right a Reamer is Shown in Position for Grinding equal precision in grinding lawnm: and ledger blades, paper cutters, pl: knives, and similar to The grinding action this machine is entir« automatic; even whe! lawnmower reel is up, with its curv: blades, no further att: tion is required until the blades have be ground twice. At t! stagea bell ring notify the operator may deepen the cut repeat the process by slight turn of the fe: screw. Arms are p! vided for gripping \ rious-shaped blades means of three cont points at each end, w a leveling adjustment insure accuracy. | machine will also grit! other tools,

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PRECISE MAP SURVEYS BY AERIAL PHOTOGRAPHY T By CLEVELAND GAINES Y\TTLE-FRONT conditions during B the World War greatly stimulated development of aerial photography, focused the attention mapping of the area in question. Two important auxiliary instruments are used in connection with the device, and are ( ip experts upon the if | bilities that lay hid- ( nthat infant science. of the principal. ad- of the aerial ey is, of course, the lity with which it can made; but hitherto known methods have ved errors, which to be computed and pensated for later. construction of an urate map from such ta therefore involved iderable time and rt. Doctor Hugershoff, ffiessor of geodesy at e Forest Academy of arandt in Saxony, ermany, is responsible an ingenious preci- on apparatus which is said to overcome ese difficulties. The new instrument, hich is really a huge stereoscope of ‘cial design, permits any two aerial ttographs of the same region, partly overlapping, to be used automatically | without further calculation, for the tages Aerial Photograph of the Town of Elterlein in Saxony and Its Environs: The Dotted Line i Marks the Section Chosen for Enlargement in the Laboratory responsible for its special claims to merit. The first of these is a computing theod- olite, which mechanically records the point of reference as well as the various inclinations of the plate from the hori zontal when an inclined photograph is taken. The second accessory, equally im- General View of Ingenious Apparatus Designed to Make Aerial Photography a More Accurate Science: The Machine Is 10 Feet —y + Feet Wide, and 4%4 Feet High. Overlapping Roughly, It Allows Two otographs to be Used Automatically for Mapping

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896 portant, is a drawing mechanism which enables the operator to trace on a sheet of paper, automatically and with accu- racy, any topographic features passed over by a movable gauge mark, which is viewed through the eyepiece. Suitable control wheels enable the operator to regulate the gauge mark as he pleases, and a special POPULAR MECHANICS scale allows the altitude of any traced point to be read immediately. Actual perience has shown that the average er: or of points ascertained in this manner at a height of 1 mile does not exceed 4 feet. either in a horizontal or vertical direc- tion; and such a degree of accuracy sufficient for topographic purposes. ENGLISH RAILLESS CAR HAS SIX WHEELS For the purpose of o! taining a more equ distribution of t! weight, the company « erating the railless t: ley cars in Bradfor Eng., has redesign its rolling stock that each car is no equipped with wheels. The two re wheels support half load, while the four f: ones, all of which spond to the steeri: mechanism, bear the mainder. The load the motor and front the transmission is t} spread over eight ti: ” Six-Wheel Construction Is the Feature of This New “Trackless Trolley” i Distribution of Weight is Claimed for It, and a Saving in Tires and Upkeep has Resulted in Use in England: Better The front wheels connected with a cent steering column. METAL CABINET FOR SHAKING OUT DUST MOPS A portable metal cabinet in which the dirt accumulated on a dust mop may be shaken out, is now being sold. The cabinet stands about 2 feet high and 1 foot square. On one side is a hanging door, in the middle of which is a slit, closed by two rubber projections. After the mop has been placed in the cabinet, these projections cling to the pole and prevent the dust from escaping back into the room. The cabinet also has—for those who use a vacuum cleaner—an- other door on top, through which the dust bag may be emptied. At the bottom is a removable drawer for -disposing of the contents. The “receiver” here described is carried by a handle at the top; another slightly larger model, in- are constructed of a light, strong met and are easily portable. tended for hotels, is equipped : Left: with small rubber wheels. Both Method of Right: New Receptac! for Use in Hotels Insertin Mop into the Cabinet, Mounted on heels,

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POPULAR IECHANICS ru j 7, SE % Mein Se j _ ‘ he WjP, ? . WHEEL-RUTTED ROCKS RECALL DAYS OF OVERLAND TRAIL ertain sections of the West, deep hanneled in the rocky roadway bear evidence of the streams of immi- vho, 60 and 75 years ago, slowly plains and passes to the across the mountain heir way the and beyond. With a distinctness y marred by the weathering of these grooves show the action of eds of iron-shod hoofs and of the f heavily laden prairie schooners the most marked is about 40 est of Independence Rock in Utah, far from the crossing of the Pacific and the continental divide. (ne \+ NEW BOILER DESIGNED FOR LIQUID FUEL ew water-tube boiler, designed with rd to the characteristics of liquid vhich sometimes gives results use it is applied to boilers designed olid fuel, has appeared recently in ind It consists of a number of il, bent tubes nested together some- in the shape of a lantern globe, with ends welded into two annular drums. poor ¢ Section of the Oregon Trail, 40 Miles West of Independence Rock, Utah, Showing Ruts Cut } in the Sandstone by the Traffic of the Pioneers | L iaisiniemasit J The burner with its ignition device is located central opening in the upper drum, and air from a motor-driven blower is introduced at the same point The jet of fuel being ignited, the blowe: forces it toward the bottom of the boile: above a where, after contact with a steam-supet heating coil, the burned gases are directed upward among the tubes by a deflector around the outside a - hm » ss A | qe | Z \ fi ’ \ j Above: Outside View | of Nest of Tubes in New Oil-Fired Boiler. | | Upper Right: Cross | Section, Showing Ar- rangement of Blower, Burner, Tubes, and | Right: Superheater. View of Bottom Tube Sheet \ —

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898 POPULAR MECHANICS OIL-WELL MAGNET RECOVERS LOST EQUIPMENT A new feature of construction has been icorporated in a recently developed mag- netic fishing PUMP STEM | - tool, com- monly used in oil-well op- erations to recover lost drills and other equip- ment. Unlike other devices, the new tool supplies its own electrical current for the magnets doing away with trouble some wires. Six batteries ie are used, iz mounted one above the other over t he magnet, and inclosed in a heavy protective casing. An automatic cir- cuit-clos- ing switch operates t he magnet only when the tool touches the object bein g searched for To prevent OF MAGNET mud or other foreign matter in the bottom of the well from interfering with the working of the magnet, a small pump within the device forces water ground the face of the magnet and the ob ject being fished for, thoroughly cleaning hoth. so that an effective magnetic con tact is obtained The lifting capacity ot the instrument is stated to be about 4,000 pounds. SLEEPING-CAR LEAKAGE MAKES PERFECT VENTILATION Years of experimental work, and the making of $,000 tests, all bearing upon. the problem of properly ventilating sleep- ing cars, have finally brought reward in the development of almost startling, yet scientifically correct conclusions. It now been determined that large ope: are not necessary to secure an adeq fresh-air supply, the unavoidable leal inward, caused by the car’s motion ing sufficient to furnish all the air ne sary. To stimulate the inward_leal however, it has been found that ex] ventilators, in the top of the car necessary to suck the dead air thereby improving the circulation simple means, scientifically determ to be adequate under actual service ditions, has the further advantage the small incoming eddies take on i1 motions, that cause slight air 1 ents which, however slight, are « tial to proper circulation AUTO GASOLINE GAUGE HOLDS RESERVE SUPPLY \ combination gasoline gauge and signal of simple design whi serves one in the tank warning ha signaled the er, has been p! on the mar] When in the position, gi flow > wee through the : to the carbut In the “lock sition the su is cut off \ the supply the gauge cut the gasoline the carbureté til the drive: turned the key to the serve” po In this device act ignal that easoline needs re ple ing and yet vents abso draining uel tank. @ Scientists in Great Britain are dev: ing a special thermometer to be use¢ fishermen in search of hake, a fish to regulate its movements accordin the temperature of the water thermometer is trailed behind the fis! boat.

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POPULAR MECHANICS 899 SUPERCAMERA GAUGES SPEED OF EXPLOSIONS rg A tus for Preparing the Explosive Mixtures: ne Leads to the Explosive Chamber Downstairs suring the speed with which an ex- 1 of gas is propagated—in certain es, such as an oxygen-hydrogen re, as high as 10,000 feet a second been made possible through a new chamber, and from that figure compute tus developed at the Underwriters’ the speed per second of the explosion tories in It will, of . This _-P course, be nec- a Su- ess iry to Oo lera ,sauge h « of an speed of the »s10)N drum c yin ye) + the film, t t diam- I \\ ln 1 10 feet ll In one revoitiution hich, ile the « he ends, losion spread I1tS cCov- om one I | ith a to the othe le ns t ¢ te t ( al t ot ie . = wr See eer Fe oa Oy nee eS a aig megs He i { dey 1 1°46 peated The Film Drum and the Explosion Cylinder: In the Small Box ant 5 afre Is an Instrument for Gauging the Speed of the Drum : mall tempt to bet- } . lel lia!) ' + ] i+ ] ] ° : which deflect the ight of an el Sateguara re Dy i@arning more hic film on explosive gases on against a photograp o utside face of a revolving drum ——— preparation of the explosive mix STEAM-FLOW RECORDER t is piped to the explosive chamber FOR SMALL PLANTS rk plug explodes the charge at one the chamber. The flash is thus The importance of economy in la graphed on the film at the beginning steam plants has prompted one enter e explosion and again when it has prising manufacturer to develop a steam ed to the other end of the chamber flow recorder which indicates and record the peripheral speed of the drum exactly how much steam is flowing frot n, and the distance between the two the boiler at any given time. This instru es on the film ascertained, it is pos- ment can be easily attached to a to determine how long it took the of boilers, and the cost of installation to travel the 10-foot length of the quite moderate

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900 POPULAR MECHANICS

FLOATING ICE IN THE MOVIES SLEEPING FLOWERS GIVE CLEw MAY BE ONLY PARAFFIN TO NEW ANESTHETIC All is not ice that glistens. Paraffin, Florists’ complaints that carn: for example, when spread over water, and curled up their petals and “went to when placed in greenhouses, led t discovery of a ney thetic. Investigatin drowsiness oT flowers, it was dis ered that it was « by leaky fixtures pe ting illuminating which contains 4 cent of ethylene, cape. The eth» caused the open to close. IC

It was only rec: however, that Dr Luckhardt and J. B ter tested the efic this gas as an an at the University of cago, finding that ders human being animals uncons< PYRIGHT, KEYSTONE VIEW Cf pleasantly and cause Motion-Picture Company’s Employe, Spreading Hot Melted Paraffin on a bad after effects of Stretch of Water Which, When Photographed, will Appear Strewn with Ice : ; i

kind so far as cai photographed with a movie camera looks determined. Recovery is said to be 1 as much like ice as that substance itself. even after long administration Hence its popularity with motion-picture companies when taking scenes that call

for floating ice LICENSE-PLATE CARRIER FITS VARIOUS SIZES MACHINE TIES WIRE-STRAP There is on the market a simple « ENDS QUICKLY that is adjustable to fit automobile plates of different sizes, and whi An easily handled wire-strapping ma- 4Uires no rivets, bolts, or scre\ chine has just been placed on the market fastening the plate = ns It which simplifies the labor of tying the Of, two pieces of thin metal bent ’ ends of wire straps quick- ceive the long edges of the plate

— oly and effi- nected with two pairs of links and ciently. After ‘Spring that prevent the plate fro envelo Pp - ping out. ing the case to be strapped, one end of . the wire is 5 ale fed into the &.. ' ‘ Mi device, the — 0 Sei other end, leading to the wire drum, being also gripped in the machine before cutting. Reversal of a lever automatically tight- ens the wire, twisting the ends and cut- ting them after they have become wrapped about each other. All moving parts of the machine then return automatically to aioe. Arrangement of Adjustable Licens< their original positions. Holder. Below: Holder with License Plate in !

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POPULAR MECHANICS 901 V IOWA GRANDSTAND OF STEEL ASSURES PERMANENCE authorities at the University of 2 feet in width, while the shorter portions had permanence as one of their of two adjacent plates form the riser he VO0. Des) as Sea eer sa plates are riv- ling Prem MS am en. a eae 7 Ta Pa = eted together rand- at about the r their center of the field, latter, with th this the upper sec- nd de- tion over- elona lapping the truc- lower, so that lhe the struc- ire built ture is prac- Upper Photograph is Given a General View of the University of Iowa’s New Grandstand Which is Built 1, and Which, Accordingly, should Endure for Many Years. The Picture t o the Left Shows How the Plates were Overlapped and the Seats Attached. Right The Steel Supports under the Stand plates bent ilong their edges SO ticallv w iterpros 1 [ie ni eat e ma large Z shaped cross sec bolted to bracket ittache to the t central part of the “Z” forms plates | tud bolt lhe section ead of the seat plate and is about place cc nodate 9,500 ectat a ’ STUDENTS’ HANDSAW HAS TWELVE SETS OF TEETH ual means for bringing home to each variety illusty iting ith ¢ ; training students and carpenter correct and incorrect tooth n setti ntices the proper index of A saw’s and beveling, as well as defects in the ties has been adopted by a large man- blade caused by poor “smithing.” Rip teet] rer of saws and other carpenters’ ind crosscut teeth are shown Shop instructors are loaned a on this nstration handsaw of standard fin Dene ut made with six varieties of teeth = — RIP TEETH CUT-OFF TEETH 8 POINT | seener | S POINT weomt | SeomT i Rr a ten aes L Demonstration Handsaw I\lustrates the Right and the Wrong Way of Filing, Setting, and Beveling Saw Teeth. It is Used for the Instruction of Manual-Training Students and Carpenter Apprenti

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902 PARISIAN STREET LAMPS HAVE BUILT-IN MAIL BOXES The munic- ipal authori- ties in Paris have taken official notice of the fact that visitors there find it difficult to post a letter, on account of the obscure location of the mail box- es These were Ire- quently lo- cated in doorways and tobaceso shops, where their presence unsus- pected by the stranger. A new type now adopted, of which 3,000 have been placed in service, is built into the base of a street lamp, so that even a visitor knows where to mail his letters. Was COPYRIGHT, UNDERWOOD & UNDERWOOC “DLANT TREES” AS CIVIC-EMBLEM PLAN IN NEBRASKA CITY \ seal picturing a magnificent maple with the inscription above it, “Nebraska City, Nebraska, the n That Gavethe World qa Great Idea,” and at the bottom, “Plant Trees,” is to be car- ried onthe business sta- tionery of the commer- cial and professional men of that city, if the plans of those sponsoring the idea are realized. The motto, “Plant originated with the late J. Sterling Morton,.of Ne- braska City, who was also responsible for the movement resulting in the legaliza- tion of Arbor Day in that state. Follow- ing this lead, nearly every state in the low Trees.” POPULAR MECHANICS Union has set aside an Arbor D which time school children end ; plant trees. Ned C. Abbott, wh: gested that the seal be adopted, that a short ‘item in this magazir scribing the slogan and seal adopt the merchants of Walla Walla, \ “The Valley They Liked So Well Named It Twice,” inspired him to the device. ITALY’S TELEPHONE SYSTEMS AGAIN IN PRIVATE HANDS The telephone systems of Ital owned by and under the the Italian government, wi over to private industry for operat is announced. The state will ownership for the time being, hx granting only the right to operate a percentage tax of the profits as site clauses of the agreements. 1) cessions, with a minimum of 25 may possibly terminate in complet: vate ownership. SPRING LUBRICATING TOOL IS HATCHET-SHAPED For ing lubr between leaves of tomol spring new and ple tool has vised In shape similar to an ord hatchet, been with an ope running throug! handle and head, to the edge. An ou screw thread runs a the end of the The car is jacked vy edge of the tool d between the leav« tube of lubricant scr on the thread, and grease or graphite through the ope: from the tube, int: space between the | of the spring. @Called upon to pay fees for the lege of broadcasting dance music, other copyrighted popular pieces, priv ly owned radio-broadcasting statio1 Chicago’ have decided to omit musi that description from their progran

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FOREST DISEASE FOUGHT BY AIR, LAND, AND WATER By FRANCIS DICKIE most important scientific battle rying on the fight. In spite of a season of T many years in the field of plant unusually severe forest fires, the worl es has been a il was effectively carried ithin the last the Pacific fthe United ind Canada, a n which the standing white- timber valued at 0.000, menaced destructive blis on until snowtall, and in five months a task was performed that would ordinarily have taken several years The disease is a fun gous growth commonly known as white- pine blister rust, or black currant rust, and in the pest, which for- | as found only eastern portion h America, was red in the fall of some bla Cc k - int leaves from ouver, anda revealed the dis- past ha S been large confined to currant and roosebet ry bushes where it has not been sufficiently virulent to attract much attentior although it has ui doubtedly in many in stances been respon 1

present over a ble for the differenc ible area [m- between a profitable tel the two gov- and an unprofitablk ents took con- crop On pine trees tl ction to check dis¢ ¢ iro p out the ¢ to vear in the 1 imber experts, ected tissue n ngers, and 9 ! gy t l cre Crm BY aT Lite et ] | Tee e service of trees as a é ooded area White Pine Girdled with the Rust Blight, the pest , ‘ and Dying a . j 1 | é here t or the ¢ ‘ u b 5. « Se ire vie ‘ ‘ ittem t if ‘ it1io \\ ¢ there Sé ¢ difference « opiniot1 to the cd ¢ ) mature trees i¢ to some reports trees 2 treet in ciametet killed by this blight. The of | urope, ind evident! originated in the Balti provinces of Russia, 1 has been known in the

: ; ; : : invaded the North At ane Used in the Campaign against Blister Rust That Infests the < ’ ° ns rests of the Pacific Coast Regions of the United States and Canada ican Continent,

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Panorama Showing Length of New Pier at Vancouver: Beginning at the Left can be Seen the The Precast Sections are Loaded on Scows and Conveyed along the Pier as Needed Ai LARGE PIER AT VANCOUVER NEARING COMPLETION By HENRY C. Hi Ballantyne Pier, now under con- struction at Vancouver, B. C., will In Fore- Derrick at Left Forcing Down Cylinder: ground, Tops of Two Cylinders in Place, and Trusses be completed and placed in service about -August 1, this year. It is said to be the 904 COPELAND largest. pier of its type on the Pa coast, and one of the two or three larg: of the kind on the continent. Dredging for the foundation begar August, 1920, and construction wor! May, 1921. The estimated cost will 5,000,000 dollars. The pier will be 1,200 feet in lengt! 341 feet in width, and will be used general freight purposes. Rail se will be given by two tracks on each a at the sides and three in the Warehousing facilities are provided five two-story reinforced-concrete s| of which four are 500 feet by 110 | and the fifth 400 feet by 110 feet, in gro: area. Electric cranes will be used for loa and unloading the ships, and electric « veyors will handle the freight in cent Diagram Showing Cross Section of Warehouse the Arrangement of Cylinders Used as Suppor

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ylinders, the Warehouses under Construction, and the Decks Where the Concrete Cylinders are Cast. v7 Place by the Derricks, They are Sunk to Bedrock by Loads of Six-Ton Cast-Iron Rings. rehouses. Grain galleries are also pro- ed he method of constructing the pier is isual. The structure rests upon 413 ‘w concrete cylinders in sections. ‘se are precast, and are 7 feet in out- diameter with 9-inch walls. Notches cast in the ends of the sections, so t they will “key” together and can be ented into one solid column as they unk into place he sections are guided into place and ered from tall The dirt is ught out of the cylinders by means of lredging bucket dropped down the in- Large cast-iron rings, six tons in ght, are used as a load to force the inders down. At times as much as 450 of these weights are used on a sin- column. in some cases, it has been necessary to the cylinders through 85 feet of ma- ial to reach bedrock. When the foun- ion rock is reached, a diver is sent n the inside of the cylinder to clean the bottom preparatory to cementing column to the rock. The entire core he column is then filled with concrete d the finished result is a pillar of solid ne, 7 feet in diameter, reaching and ented to the bedrock On top of the columns precast trusses reinforced concrete are placed, and ut them is built the form for the con- ete deck. in carrying on this work, the cylinder tions and trusses were all rth Vancouver, across Burrard derricks cast at Inlet, where there was plenty of room for as- sembling material and storing the cast parts for curing, whereupon they were conveyed to the site of the pier on scows as needed. Considered from the standpoints of per- manency and cost of maintenance, this type of wharf structure is far superior to the creosoted-piling structure FOUR-IN-ONE TOOL MAKES HANDY COMBINATION tools — 1aC Four commonly needed k, vise, breast drill, and screwdriver—in one are offered on the market in the form of a single combination tool The ratchet driver which works the jack also serve: to actuate the drill or screwdriver when it 1s fixed in a socket placed in the end of the shaft Left: The Combination Tool When Used as a Breast Drill. Above: As a Vise. Right: As a Jack

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906 POPULAR MECHANICS PHONOGRAPH WITH KEYBOARD PICKS OUT RECORDS As an innovation in the construction machine that, upon the pressing of an of phonographs, an inventor has built a certain two keys, picks out the desired record, places it in po tion on the turntabk swings in the tonear: and lowers the needle into position, thereupon starting the playing mechanism. When tlh: record is played throug! the mechanism auto matically gets into actio1 again, swinging the play ing arm back, stoppin the turntable, pickings up the record, and ri turning it to its place the magazine, whi holds 50 records. The pressed-down butto1 lock themselves and tl] remainder of the keys position, thus preventir tampering with and i jury to the mechani while the record is bei: plaved. Fifteen key control the machine These may be built on portable board so as t be carried about t house, an electric cab Above: Two Views, Showing Mechanism of Phonograph That Picks Out connecting it with t Its Own Records. Lower Left: Portable Keyboard Mounted > cp i on Pedestal. Lower Right Listening to the Music pnonograpn RECORD FOR HAULING SPRUCE CLAIMED IN MAINE Rivalry among tl crews in the Mai woods, as to which cou haul the biggest load “pulp,” as the peel spruce for paper maku is called, resulted recent ly in a crew at Ventu Brook, Washingt: County, piling and hau ing a sled with a tot load of over 12 ccrd This is considered quit unusual for haulage this kind. The sle was 32 feet long, or tl length of four cords, an the supporting = stake ‘ oe were 12 feet high [1 a 6 Dag spite of the heavy loa - - @ only the regular tw horse team was neede The Enormous Load of More than 12 Cords Piled and Hauled by a Crew i Working at Venture Brook, Washington County, Maine to pull it.

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POPULAR MECHANICS YMPIC GAMES’ 1932 SESSION ,\WARDED TO LOS ANGELES Olympic Games will be held at \ngeles in 1932. This announce- made at the international ic committee's recent meeting in to discuss plans for the games in next year. It was decided that lam, Holland, would be selected e meet in 1928, because disturbed ic conditions might prevent Euro- ompetitors from financing a trip to ited States at that time, but that should have the next available he award terminates a vigorous yn by athletic authorities through- e country, and by Angeles, n building a new large stadium ex- the hope that the award would to that This will be the time the will be held in the first being .in 1904, at St. Was Los city games SIGNAL INSTRUMENT CHARTS WATER-LEVEL RECORD nstant check on the water level in boilers is the object of a new re- device recently placed on the The instrument makes a written of the height of the water in the boiler through- out the 24 hours, and in addition rings a bell when- ever the level is either too high or too low. A me- chanically op- erated pen draws a red- ink line on a cire¢wlar, clock - driven and this record indicates graphi- all the important facts which need known regarding the care the boiler eiving. The red line also shows the time when the boiler was “cut in” “cut out,” when it banked for night, when it was “blown off,” and in operation. Foam in the boiler lates the bell signal in the same way uld low water, and the ringing will tinue until this undesirable condition orrected. The water gauge is illumi- ted sufficiently to make its markings le 50 feet away, was 907 CONCRETE OFFICE BUILDING COMPLETED IN DALLAS One of the world’s tallest concrete office buildings, a 2l-story structure known as ati ——— | How the 21-Story Concrete Office Building in Dallas, Texas, Appears from a Neighboring Structure the Medical Arts Building, has been com pleted in Dallas, Tex Except for the three lower stories, it is in the shape of a cross, thus admitting outside light to all the offices These are only by physicians and surgeons. The building might be onolith, hav ing been poured in one continuous proc- ess. The cost 1,250,000 dollars being occupied my =e calied ail was DESIGN HOSPITAL AIRPLANE FOR SURGICAL WORK \ hospital airplane, the first of ticular type in this country, will soon be built at Field, Dayton, Ohio, it was recently I McCook announced. It will design, distinguishing ambulance planes now in use, a vides a compartment in which a can administer to two patients lying on comfortable cots while the plane is in flight The capacity will be a pilot, surgeon, and two patients, or, if some less essential parts of the equipment are left out, four persons in addition to the pilot can be carried. a special

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908 POPULAR MECHANICS HUNDREDS OF SNAKES KILLED BY ROAD CREW — Tee A road - construction crew working in centra Washington has been killing hundreds oj ¥ rattlesnakes daily. The road on which t snakes have been found . in such numbers is bx ing built from Yakir to Ellensburg by t United States Bureau of Public Roads. Recent! a single blast killed 123 of the reptiles, 41 oj which were more tl 4 feet in length, so: with as many as 15 . ; rattles. The crew gat! ‘ , ., mt Aa a > a s ereda few dozen of thi | . ee . : — ee snakes, after a blast, an strung them from a ri oe we * ear A Few of the Hundreds of Rattlesnakes Killed by a Road-Construction Crew Working between Yakima and Ellensburg, Washington: Many ie “pe of the Reptiles Were More than Four Feet in Length for exhibition purpose GIANT “CASH REGISTER” AIDS UNIVERSITY CAMPAIGN place of student-worl ers who met to rep their progress. As t amounts were called campaign leader “rat them up” by striking t proper keys with sledge hammer. Gir! students, standing b« “Ringing Up” the Giant Imita- tion Cash Register at the Uni- versity of Southern California A giant “cash regis- ter” constructed of wood was recently used as a publicity stunt by students of the Uni- versity of Southern California in conduct- ing a drive for school funds. Placed at a conspicuous point on hind the appliance, slipped into pl the campus, the register was the rallying placards bearing the appropriate figu As Contributions to the School Fund were Reported, the Leader ‘Register the Amounts by Striking the Proper Keys

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POPULAR MECHANICS + es ae, rg Signe — ‘, es a Glance at This View of the Altamont Pass Viaduct, on the Stockton Highway, California, Brings Home at Once the Dangerous Nature of the Crossing before the Completion of the Structure CONCRETE VIADUCT MAKES and a set of switches for electrical heat ALTAMONT PASS SAFE ing, are provided. Special emphasis 1 placed on an ingenious arrangement e completion of the Altamont Pass’ whereby the canvas belt may be easily luct on the Stockton Highway in centered; an asbestos apron which may ornia eliminates one of the most be run through the machine to protect verous crossings as well as one of the canvas belt from rotting when not vorst stretches of road in the state. structure is of concrete, built on t is known as a reverse curve, that like the letter “S,” with its curves vn out and flattened. It is 35 feet with the outer edges of its curved vay elevated on the bends to assure travel. Foundations for the piers to be carried down to bedrock, which found 35 feet below the surface importance of this link may be red from the fact that more than 1000 vehicles have occasion to use the sing each day. Tu BLUEPRINT DRIER FEATURES COPPER CYLINDER Embodying a number of features of erit, a new machine for drying blue- rints has been placed on the market. In peration, the wet prints are drawn ound a heated cylinder.by means of an ndless canvas belt and delivered dry and = ——— nea ree from wrinkles in a receiving tray Biusprint-Drzing Machine in Oreste of Mackin ithin easy reach of the operator. One ature is the use of a copper cylinder, in use, and cut gears and ball bearin ‘ ~ ich heats quickly and to which the in the driving mechanism. Eight to nine rints will not stick. A thermostatic con- feet of prints may be run + through t for use when gas is the heating agent, machine per minute

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POPULAR An Acetylene Egg-Candling Machine, a More Eggs than nish the Electrical Claimed to Fur- Satisfactory Means of Grading Candler MECHANICS EGG-CANDLING MACHINE USES ACETYLENE GAS An improvement over the electric ty; of egg candler is claimed for a new ma chine which employs acetylene gas as source of illumination. By this mea: the machine makes a blood streak the egg show red, instead of mere! dark, as in the electric. candler, thereb furnishing a more reliable means of grad ing the eggs. A small gas generator fu: nishes the light, and is connected to tl! candler by means of flexible hose. Thx device is hooded, and its interior painte a dull black, to minimize reflection WELL-KNOWN SKIPPER GIVEN “LEVIATHAN” COMMAND APTAIN HERBERT HARTLEY, recently given command by the United States Lines of the largest American ocean liner, the “Levia- than,” and the second largest ship in the world, attained his post by rea- son of typical Yankee pluck and merit. He is, as well, the oldest in point of continuous serv- ice and the only Ameri- can-born captain in the service of the American Line. He was born at Oswego Falls, N. Y., in 1875, and, after his years of training joined the “St. Louis,” at that time (1896) one of the fastest and largest of transatlantic liners. For 21 years he was shifted from ship to i ep ren ‘ie Fn fet CAPTAIN HERBERT HARTLEY Commander of the ** ca’s Largest Ocean Liner ship, always advancing, until, in 1917, he returned to the “St. Louis” as its captain. As skipper of the “St. Louis” he ran the German blockade in March, 1917, the vessel being the first armed merchantman to reach an English port. Later in the war he was made a lieutenant commander in the Naval Reserve, in recognition of his skill and daring. When, after the war, the “St. Louis” was burned, Captain Hartley was placed in command of the “Mon- golia,” which position he retained until he took a ————=_—S—=—- vacation recently, his ap- pointment to the “Levia than” following his brie! rest. Leviathan,’’ Ameri- NOVEL SUBSCRIPTION oi ce Money Pledges Hung Up in Front of a Store in Hilo, Serve as an Appeal for Benefit of Sufferers from More Subscriptions for a Tidal Wave APPEALS IN HAWAII Among the victims of a tida wave, whicin recently did muc! damage to Hilo on the islana « Hawaii, were many Japanese an Chinese. When their country men set about raising funds fo their relief, headquarters established in one of the of the town, and money collected. These, written on lon strips of paper, were then hun about the front of the sto to serve as an appeal for addi tional funds. wert store pledge Hawaii, to the

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KNOCKDOWN ROWBOAT SIMPLE AND COMPACT e Result of an Ar- Fisherman’s Desire Quickly Assembled kdown Boat of Light ht Yet Stanch Sea- hiness, a New All- 1 Boat has Made Its rance. The Picture the Right Shows the act Case in Which Boat may be Packed Secured to the Run- Board of an Auto Two Canvas Bags ied with Strap Han- re Fitted to the Although a 12- the Boat can be ned in a 12 by 18- Inch Space ee ght: Showing the ramework of the Boat issembled, the Canvas Cover Yet to be At- tached. A Padlock in the w Prevents Disassem- of the Boat. The r is So Constructed That a Weight on the ttom Binds More Tightly the Metal Fas- tenings = i — . ae NS Bs . i +? PION t Left: With No Other Tools than the Hands, the 21 Separate Boards are Quickly Meshed To- gether. No Bolts, Screws, Complicated Fasteners, or Small Loose Parts, to Become Lost or Mis- placed, are Used. After the Floot is Put Togeth- er, the Sides are Assem- bled and Attached — Left: The Boat Complete- ly Assembled, the Heavy, Strong Army-Duck Canvas Being the Last Addition The Buckling of the Seats Stretches the Enveloping over the Boat All Wood Used Waterproof Airplane Board, Metal Fas- teners being Riveted with Large Brass Rivets. Weigh- ing 100 Pounds, the Boat will Accommodate Three Grown Persons. The In- ventor Claims It can be Assembled in from Six to Eight Minutes, will Not Shrink from Heat, nor jLeak, and will Last for Years

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912 POPULAR BUTTER VANITY CASES NOW USED IN GERMAN CITIES Vv Ca anity are reported to be used for car- rying butter by women restaurant pa- trons in Ber- lin and «other German cities. The men ouse metal boxes, made in imi- tation of a small book, for the same Pp u Tr pose. Few of the re@ &£§& 2S = rants can af ford to serve butter as freely in pre war days, and in those providing it the price is exorbitant s€¢ Ss as SPECIAL SLEEVE FEATURES NEW ROLLER BEARING A new roller bearing which, in common with others ot the type, has for its main the reduction of friction losses suffered in ings where sliding friction offers a feature in an accurately eround high-car- bon steel that is clamped to the shaft Steel collars welded to the sleeve are so drilled and tapped to render it impossible to put the sleeve on the shaft incorrectly, a true bearing surface for object bear- occurs, sieeve thus insuring the rollers GULF STREAM PREVENTS MAIL FROM REACHING LIGHTSHIP Though the ocean was calm, and ap- parently entirely usual,’ the mail boat calling at the Diamond Shoal light- ship, near Cape Hatteras, N. C., recently found the Gulf Stream near the lightship running so strong that it was impossible “as MECHANICS to row through it. Ordinarily, the str: is some distance from the ship. Bet leaving, the captain took the temp: ture of the stream and found it t 72° F., while about 100 yards away, « side the stream, it was 16° lower. COLLAPSIBLE COOKSTOVE FOR CAMP USE A collapsible cookstove and heate: camp use has been devised, which ris fully claim to merit of simplicity constructi It two sect of pip mounted ve« tically, « above and t other bel the sto pl oper, at consist posite end it. Wood other fuel « be used in t lower pipe chamber, hea t pas upwar through the upper draft stand, and out through a damper regulating the PORTABLE WELDING OUTFIT GENERATES OWN GAS A new portable oxyacetylene ap- pliance has appeared in the form of a gas gen- erator intended to do away with the use of high- pressure cyl- inders. It o per ates automati- cally withou clock or motors, is simple to use, andhasthe equivalent carbide capacity of a 150- cubic - foot cyl- inder of gas It weighs about 200 pounds.

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OVER THE TOP—AND DOWN ap English Grand National Steeplechase, one of the most colorful events in the world of sport, is never without its thriils--~ and mishaps. Few falls, however, have ap- proached the spectacular more closely than that taken by “Trentino” at the Bechers Brook jump. Both horse and rider hit the turt almost perpendicularly.

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914 POPULAR MECHANICS WINTER WHEEL DESIGNED FOR MOTOR VEHICLES Successful results reported to have bee obtained with a new t of wheel that can used on a motor-driy sleigh or attached to ordinary automobile removing the rear whee! and mudguards. T| wheel, which is in form of a helix with axis parallel to ground, worms its through snow and « ice with a traction t increases with the in the vehicle. Ea — = wheel is driven by Motor-Driven Sleigh Equipped with Specially Designed Wheels, Which cial gears inclosed Increases Its Traction with the Load upon It: Each Wheel as - ‘ is Separately Driven through Gears at the Rear case at the rear. DISSECTING SCOPE IS COMPACT AND EFFICIENT A simple and efficient dissecting device and tweezer are attached, and the t designed for use in examining small ob-_ can be slid into the hollow tube. jects found in plant and insect systems, offers a compact instru- - sii ceenen mt fete ment that can be folded up and @Bt*S , sso a mance carried in the student’s pocket. It consists of a tube-shaped holder which is held in the left hand with the forefinger in po- sition to manipulate the tweezer while the thumb rests on the tiltable focusing block. The right hand is thus free for using the dissecting needle. When not in Above: Pocket Dissecting Scope with Tweezer and Lens Ex- ; tended Ready for Use. Below: Sectional View, Show- use the part to which the lens ing Scope and Tools Folded into the Hollow Handle WAGON FILLS AND DUMPS ITSELF IN SHORT TIME For transporting eart! or other materials self-loading and dump ing wagon has been vented. A wide blade front lifts the earth a conveyor carries it ward into the box. D tributing is done by an apron, as in a manure spreader. The moving parts are actuated | traction of the rea! wheels, and a wheel r¢ ulates the action of the ee ee eee oun blade. The wagon fi A New Type of Dumping Wagon Designed for Scooping Up and Moving its in about 50 fee Earth and Similar Materials on the Farm: The Hand- sac n a wed wheel Controls the Depth of the Scoop dumping as desired.

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POPULAR MECHANICS New Automatic Manufacturing-T cate Parts Where the Loading Milling Machine, Which Provides for High Production of Dupli- ime Is About Equal to the Cutting Time. Right: Machine in Operation; Note the Chips, Indicating the Heavy Cut That is being Made AUTOMATIC MILLING MACHINE FOR PRODUCTION WORK e salient feature of a new milling hine, designed for the production of icate parts in large quantities, is the matic control of the speed and travel he spindle and table. This is accom- ed by means of dogs located at the t and rear of the table. Other dogs ide for automatically working the ng, stopping, and reversing of the lle. The automatic stopping of the lle with the table on the return stroke vides against marring the work. By rsing the spindle, two sets of cutters teeth facing in opposite directions mit a cut to be made in either direc- The table is long enough to permit ting up of work on one end while the tter is operating. It is arranged for tant-speed drive either from a line t or from a motor in the base. DEVICE HANDLES VEGETABLES MECHANICALLY \n interesting handling and weighing eptacle for vegetables has been placed the market for the convenience of tail grocers. It is designed to simplify labor of sacking onions, potatoes, and the like. Ordinarily, the merchant fills the k at the barrel, then carries it to the scales for weighing. The new device has a capacity of several bushels, and can be set up on the counter. A sack, resting on the scale platform, is placed under the spout, and it is only necessary to work a small lever back and forth, meanwhile keeping an eye on the scales, until the correct weight registers. A Convenient Vegetable-Handling Receptacle, Which can be Attached to the Grocer’s Counter: The Scale Is Adjustable Vertically, for Handling Short or Ta.l Sacks

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916 POPULAR MECHANICS RICE-FIELD WASTE BENEFITS SUGAR REFINING From the fibrous rice materials—the hulls, straw, and fibers—which formerly cost money to dispose of, now is being made a product that not only brings a Discoverer of Method of Utilizing Rice Waste in His Laboratory: The Quantity of Waste on the Paper Is Sufficient to Treat 100 Pounds of Sugar return to the planters and the mills, but finds a ready use as an economical sub- stitute for boneblack in refining sugar. The fact was discovered by accident when a chemist, who was experimenting with the paper-making qualities of rice waste, left some of it in his drying oven for several days. He found that though the waste had become thoroughly carbon- ized, it had not shrunk or lost its shape, which indicated it to be a porous mate- rial of clarifying properties. He mixed some with molasses and there was no change, but when he boiled it with caus- tic soda to remove the silica, and then mixed it with molasses, the mixture cleared up at once. When treated commercially, the fibrous rice waste is put into a retort from which air is excluded, and there exposed to a temperature of 2,000° F. for half an hour The carbonized material is then trans- ferred to digesters and, with a strong alkali solution, is subjected to a temper: ture of 235° for two hours. A nearly pure carbon results, which is as porous as a sponge, and so hard that it requires several hours’ grinding in a ball mill to reduce it to a powder. Even the dust particles retain a definite shape and their porous nature, which makes the material such an active clarifying and decoloriz- ing agent. As a decolorizer it is mixed with a sugar solution in the proportion of one-half pound to 100 pounds of sugar, heated in a suitable tank, and filtered. The material still possesses considerable coagulating properties and gum-absorb- ing power, and is used for clarifying im- pure cane juice. _ The use of boneblack in connection with sugar refining involves an expensive outlay for the production of the bone- black and for treating the sugar. It is said that with the new material a re- fined sugar of exceptional purity can be had at somewhat less cost than with boneblack. Another advantage that is to be regarded as of some importance, is Val lata alae Twenty Tanks Similar to Those Shown at the Left are Required in the Boneblack Process of Refining Sugar, for Doing the Work That can be Done by Three Filters Like the One Shown at the Right, When Using Carbonized Rice Waste

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POPULAR MECHANICS

Left: Showing the ally Severe Which a _ Sheet Flooring was Sub- i to Determine Its Resisting Qualities. Intense Heat of an acetylene Flame was ed for Several Min Upper Right: Test; Only a Few Marks Resulted, Even Burning igh the Sheet. Low- Right: How the ts are Laid Down. Joints between Them Later Filled with a Special Compound

the reasonable cost for equipment put the use of this material within reach of small refineries. carbonized rice waste has possi- es as a decolorizing agent for coco- nd other oils, as well as for glue, n, glycerin, and many chemical ns. NEW FIBER FLOORING HAS FIREPROOF QUALITIES ims of unusually fire-resistant quali- are made for a new type of fibrous ring material recently developed and “<1 on the market. The material is up in sheets measuring 16 by 28 es, and in two thicknesses, % and ¥ It is also asserted that it is a non- uctor of heat, and will neither ex- | nor contract appreciably under tem- ture changes—both very desirable ties. Its additional bids for merit as or covering, are that it is noiseless ie tread, oil and waterproof, and not pery to walk upon. When laid, the between the sheets are illed with ecial compound, making a floor cover- of practically uniform texture. The ts are laminated, all the long, narrow individual sections being held together by four parallel pins running through the sheet. Speed and ease characterize the labor of laying this floor. AUTO STEERING-WHEEL LOCK EASILY INSTALLED One of the newer auto steering-wheel locks is made so that it can be easily in- stalled by the owner him- self. It con- sists of a sec- tion which is first clamped, then pinned to the steer- ing post, and the lock proper. The latter is of the plunger type with two plungers, one on each side of one of the spokes of the steering wheel, and when in position prevents turning of the wheel.

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918 DEVICE REGISTERS QUANTITY OF OIL AND GAS IN TANK The number of gallons of gasoline in the supply tank or the quarts and pints of oil in the crankcase of an auto en- gine, can be ascertained by the driver —— —_—__— without leaving his seat, by means of a device re- cently put on the market. The in- dicator is placed on the instru- ment board, and from it are read either the gallons of gas or the amount of oil. In making a reading, one stroke on the pump handle lo- cated beneath the indicator, forces all the liquid out of the standpipe, which is then put in communication with the hydro- static ptessure of the tank by turn- ing the lever to the register posi- tion. The gauge then shows the re- spective amounts on hand. . . * - - . - . - - - . - -

SA NEW LAMP LOCK ATTACHES TO BRASS SOCKETS A new locking device that attaches to standard brass sockets and is intended to prevent theft of electric-light bulbs, is iceaealncaiaaeaii nian being placed on the market. It is simple in con- struction, being made of cold- rolled steel. When i attached, it is nearly impossible =~ > to remove the lamp from the 8 socket, and it is a dangerous to at- tempt to do so without the use of

the key. It is pro- iY tected by an € Hi) y insulator that A guards against shock.

POPULAR MECHANICS PLAN MONUMENT AT CAPITAL FOR SOUTHERN “MAMMy” A monument at Washington, D. C.. to commemorate the virtues of the old southern ‘“mammy” has been proposed by the Jefferson Davis chapter of the Daughters of the Confederacy. A_ goy- ernment gift of land for that purpose js said to be under consideration by Fed eral authorities. While exact plans as to the form the monument will take not been adopted, it has been suggested that it should be a seated figure of 4 middle-aged colored woman, the “rea! mammy type,” with a “pickaninny” on one side holding her hand, and a w! child on the other; this to symbolize mothering she has given to the two ra Visitors to the South say that the chee: < ful, utterly unselfish mammy of old days, whose character has be largely traditional, will soon disap; and it is believed that she deserves a fit ting memorial. VERY DURABLE SCREWDRIVER WITH INSULATING HANDLE Made from high-grade steel, a screwdriver is tempered so as to give such durable qualities that is claimed to be - indestructible. It has a handle, made of an _ in- sulating composi- tion, which is se- cured by a patent locking device that prevents it from twisting on the shank. The insulation is test- ed to stand 15,000 volts. The blade ‘ is of selected steel, carefully ! forged and heat- treated, and ex- y tends through the handle. i It tended specially for the use of electri: and automobile mechanics.

Yellow, brown, chocolate, blue, other bituminous paints, mixed and re for use, and applicable without prepa tion of the surfaces to be painted, | recently been put on the market. inventor claims that, no matter what t material to be painted, it need not given the familiar red-lead priming.

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POPULAR MECHANICS tograph Shows the Density of the ‘‘Forest,”” Roswell, New Mexico, Planted. Once on a Barren Plain, the Town Began Setting Out Cottonwoods Nearly a Half Century Ago. Today the Trees Literally Hide 325 Homes, Three Churches, and a School FOREST SURROUNDS HOMES form and chair and keeping the whole OF CITY ON PLAIN on a level. The lineman finds that hav- de trees in a city surrounded by the plains country of the Southwest an appeal much stronger than in unities where any tree problem has one of elimination rather than of ction. On that portion of the which is now known as Roswell, cottonwood and elm trees have planted with fervor since the 80's, is an example of what can be plished, this city now has in its a veritable forest of shade trees. ense is the growth that even with- e foliage the branches of these city are thick enough to hide 325 homes, churches, and a school. Property are required to care for all trees nd near their property. A _ special is required before any can be cut I ioved. TELEPHONE LINEMAN USES HANGING CHAIR omfortable seat while making wire is provided by the handy device oped by a western lineman for his § . use. The chair.is mounted on a ~~ nes - - = 2 ener Showing How an Ingenious Lineman Lightened His ible platfe rm, which is carried Daily Grind by Using His Inventive Powers Inci on a small truck. On short trips dentally, He Is Able to Accomplish More and Do lineman wheels his little truck about wr wore and, but on longer ones it can be ing a secure and comfortable seat im hed to an automobile. Ropes and proves the character and increases the vs are used for elevating the plat- amount of work done.

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CIVIC FEATURES THAT PROMOTE THE COMFORT This Is the Entrance to the Thirteenth National Orange Show, Held at San Bernardino, Cali- fornia. This Annual Event Is of Considerable Importance to Southern Californians, and Always Draws Huge Crowds. Naturally, Most of the Space is Devoted to Exhibits ———} and Feature Displays of Fruits ne Queen Anne | Granted the Land upon W hich This Church was Later Built at Wells, Ver- mont. It Is 150 Years = Old. The Large “Win- _j dows”’ over the Door Are But Cleverly Painted Imitations — This Because of the Prohibitive Cost of Glass in Those Days. Left: A Sundial, Erected on the Bank of the Fox River, Illinois, Marks the Site Where Lin- coln was Mustered Out of Army Service after the Black Hawk War aes allseengetintedndnitegel Two Years were Spent by an Artist in Edwards- ville, Illinois, in Painting This Bird’s-Eye View of His Home Town. His Painting Measures 5 Feet High by More than 20 Feet Long

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AND ENJOYMENT OF VISITORS AND RESIDENTS Ly in FALLS PARK Tourist Campsite WELCOME The Tourist Overtaken by the Dark will Find .\— Ample Hospitality If He Spends the Night at Pendleton, Indiana. A Comfortable Camp is Pro- vided, Equipped with Running Water, Electric Lights, and Gas » for Cooking, All Free. It is f g Supported Entirely m by the Townspeople Above: Bellevue, Iowa, on the West Bank of the Mississippi, Has a River-Front Park, Extending the Entire Length of the Town. This Boat Landing Is One of the Numerous Beauty Spots of Bellevue. Left: A Simple, Sturdy Memorial, Erected by the Local Post of the American Legion on the Park Lawn. Be low: Bellevue’s Park Driveway, Skirt ing the River y 7 ® zie

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922 POPULAR CHECK PROTECTOR WEIGHS ONLY HALF POUND The latest check-protecting device that has made its appearance claims the merit of extreme simplicity, and weighs only SOHN Par to THe ‘ORDER Os ; 192 Ne DOE & Go, *3 66349 SAMPLE CHECK NOT NEGOTIABLE This Check Protector, Nickel- Finished, is Gripped in the Hand Like an Office Punch, and Carries a Self-Inking Printing Dial in Its Interior 14 pound. It is handled like a small office punch, being gripped in the hand and the check inserted under two guides. A hard- rubber knob, grooved to facilitate turning accurately, carries all the necessary fig- ures and characters on its circular edge. As each figure is set, the handles are squeezed and brought together; this ac- tion makes a red-ink impression of the figure which also bruises the paper and prevents erasure. On releasing the han- dles the check is automatically advanced a space ready to be given the next im- pression. TONS OF DUST TRAVEL IN THE SKY Two thousand tons of dust was de- posited per square mile in the vicinity of Laramie, Wyo., recently, according to the calculations of Prof. S. H. Knight, of the University of Wyoming. This dust was partly transported from other western states. Such deposits are comparatively large in all western states, though usu- ally more than 90 per cent of the dust is of local origin. Only the very finely powdered dust travels very far, though MECHANICS some has been carried from Utah. N vada, and Arizona to Wisconsin a; Ohio, as microscopic examinations h revealed. The most favorable condition for | cipitating the dust is, paradoxically) snowstorm, though the late sum: showers in the arid states are much m heavily freighted with dust, at times ey mud. The rain and snow serve to filt: the air, leaving it very clean. At time the western states, clothing, windo walls, and all other objects exposed the beginning of a storm coming aft a prolonged drought, will become ba smeared. There are accounts of other heavy di deposits, upward of 800 tons per acre ing reported in one instance in the D kotas. But where the dust deposit has been lifted from the Rocky Mount region and carried to Wisconsin t amount seldom exceeds 15 tons per ac: WRENCH COMBINATION TOOL HAS STRONG GRIP There has recently been introduced combination tool which is essential], wrench with a movable jaw that carri: teeth engaging segmental gear teeth « the end of one of the plierlike hand Three interchangeable jaws convert t! wrench, tool into a suitable for maz The Three Interchangeable Jaws of This Tool Con It into a Wrench for Several Purposes purposes. The arrangement of the m able jaw provides for adjustments METAL AND GLASS WELDED BY SIMPLE METHOD Electrical fittings have recently be« made in which copper and _ porcel: or glass were welded by a new metli which is declared to be as cheap as it effective. The copper rod, or rivet, threaded through the porcelain or gla and a pressure of one-half ton appli for a quarter of a second, during whi interval heat is instantaneously applied t effect a fusion. V

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POPULAR MECHANICS Above: Small Tractor Fitted with Winch Designed Pri- marily to Meet the Require- ments of Pulling Cables through Underground Con- duits. Note That the Winch, Which Overhangs the Front of the Tractor, is Driven by the Diagonal Shaft Connected to a tandard Automobile Gear Shift at the Side of the Trac- tor. Left: Tractor Winch Pulling Telephone Cable through Manhole Leading to Underground Conduits a WINCH DESIGNED TO ATTACH the device can be used in the course of TO FRONT OF TRACTOR hardening a small piece of steel, such as a tap, when heated over a Bunsen burner. new winch that attachestothe front of The device requires no calibration tor has been designed to pull cables rough underground conduits satisfac- Though intended for use in tele- ne work, it is adaptable for many er purposes. The objection to some tor winches that they have only one eed, has been overcome by introducing rdinary automobile transmission be- een the power shaft of the tractor and cable drum. Power is transmitted the tractor through a set of gears the transmission and through a cone h to the winch drum, thus providing ee speeds forward and one reverse. DEVICE SHOWS CRITICAL POINT IN HEATING STEEL \ new device for determining the crit- | point in the heating of steel, by icating when the steel ceases to be gnetic, is a light self-contained instru- nt that can be held in one hand and is ee from leads or electrical connections. e indicator receives its magnetism from permanent magnet which is protected rom injury by its location within the ine “= 2 a. rument itself. Inasmuch as the test is Abave:. Using Indicator to Determine Critical Point pli : " of Steel in Heating Furnace. Below: Applying plied to the steel instead of the flame, Test to Steel Heated over Bunsen Flame

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Va- has Considerable Rivalry among rious Cities and Villages Sprung Up Concerning the Question of Which Has the Widest-Paved Thoroughfare. Here are Shown Two Views of the Work of Paving Main Street, Keene, New Hampshire, with Concrete. Keene Claims the Widest-Paved Street in New England. In the Upper Photo- graph are Seen the Details of the Construction, and the Great Width of the Thoroughfare Per- mits Inspection of the Various Steps in the Work. Below are Shown the Piles of Gravel and Rolls of Wire Netting Used as a Foundation for the Layers of Concrete OP 5 meat ca "iti oO

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{ { POPULAR TURN WORN-OUT MONEY BACK INTO PAPER n-out United States currency rep- ing millions of dollars, cut up and has been shipped to the Forest icts Laboratory at Madison, Wis., used experimentally ir the manu- e of paper. Prior attempts at the tory resulted in paper of a poor ty, but it is expected that with a new ng process a more satisfactory ict will be obtained. As much as three tons of paper money are led and destroyed on occasion at treasury in Washington, D. C. If experiment proves successful, the nment will continue the pulp ship- WATER-PROPELLED NOZZLE CLEANS SEWERS two-part water-propelled nozzle, of bronze, has been developed lately for removing obstructions in sewer or drain pipes. The two parts are con- nected by a ball- bearing swivel mounted between them, the head, or forward end, being pointed and contain- ing a series of diag- onal vanes to pro- duce a rotary motion when inaction. When connected to a hose and the water is turned on, the latter escapes rough perforations in the rear of the d, causing the nozzle to impel it- forward and drag the hose after it. e point of the head is also perforated, that part of the stream serves to en up the obstructive material. MECHANICS 925 AUTO-STEERING ATTACHMENT IMPROVES CONTROL A new device has been developed for eliminating the wobbling of front wheels, particu- larly in cars whose _steer- ing posts are not fitted with a worm gear. The attachment is made of cast bronze, in t wo halves, which clamp around the post, the up- per half be- ing loose and the lower one tight. An ad- justable spring that provides ten- sion between the two halves, comes into play when the steering wheel is turned. NEW ISLAND REPORTED FOUND NEAR FRENCH INDO-CHINA A new island, believed to be of vol- canic origin, is reported to have been sighted between the Philippine Islands and French Indo-China. It is said to be about 50 feet above sea level and a half mile in circumference. Farther east, in the Pacific Ocean, a governmental scien- tific party is exploring Bird Island, one of the bits of isolated lands in the Ha- waiian archipelago. This expedition also intends surveying most of the islets be- tween Kauai and Midway Islands of the Hawaiian group. WIDEST GRANITE CONCRETE ROAD IN THE WORLD What is claimed to be the widest con- ete-paved street in the world is laid Keene, N. H., and measures 140 feet m curb to curb. On account of the k of suitable trap rock or gravel in e state, and great prevalence of granite nd marble, crushed granite was used in e concrete. After excavating to sub- vrade, the latter was rolled, and a 7-inch ab, reinforced with steel mesh, was ap- ed to the roadway. The unusual width necessitated a division down the center line, each 70-foot section being again divided into three parallel lengths sep- arated by butt joints. In order to lay out safety lanes at the street crossings, the concrete at these points was mixed with a portion of lampblack, and a 10- foot section, 2 inches thick, was laid over the ordinary mix to present a sufficient contrast between the safety lanes and the remainder of the pavement.

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926 POPULAR SIMPLE BUCKET ELEVATOR STORES FARM GRAIN A simplified type of bucket elevator intended greatly to facilitate the work of the farmer when storing corn or grain, has been placed on the mar ket. Rolled- edge buckets with welded Sectional View of the Bucket Elevator Set Up in a Corn Crib: It Is of All-Steel Construction, and Has Only One Shaft and Two Bearings joints are provided in the new elevator. These are mounted between an endless steel strap, whose links pivot on roller bearings, a feature which lessens the power requirements of the drive. Its capacity is 100 bushels of grain elevated in from three to five minutes, on a gaso- line consumption of 1 gallon in 10 hours. PILOT IGNITION DESIGNED FOR STEAM CARS A new pilot-light assembly now on the market, for use as an ignition device for the fuel burner used on steam auto- mobiles and trucks, features a rapid va- _— Assembly and De- tails of Pilot Igni- tion and Fuel Burner for Use on Steam Automo- mobiles MECHANICS porizer that, it is claimed, does not « carbon, and an arrangement of the a take that prevents the pilot from blown out. HELICOPTER RISES 20 FEET WITH NEW MOTOR A new record was recently mad McCook Field by the De Bothezat copter, when a height of 20 feet attained in several tests, none of lasted over two minutes. The imy ment over previous performances tributed to a new 200-horsepower motor with which it is anticipat height of 100 feet can be reached. MAGNET TURNS STIRRING RIG INSIDE CLOSED DISH A clever arrangement has been dey for stirring solutions that the che: often finds necessary to keep from cont with the and whi for vari¢ reasons, c not be put containet GLASS COVER that are su ; ceptible shaking. ‘ agitat-: which sor what ress bles the n er of an ic’ cream fret is mount on a spi! dle whic! pivoted at t bottom at the cover the vessel, and carries at the top an i crosspiece. On the outside, and above the cover, is mounted a st! magnet which is provided with a suit driving means. When the magnet tv! the iron crosspiece at the top of the ; tator spindle follows, thus creating stirring action. accor ! \ AGITATORS GLASS BEAKER @ Surrounding Chicago's sewage-disp: plants with parks and golf courses is |! ing considered by city officials. The p! has been recommended to offset t “sentimental” damage done to adjact property under present conditions | cause of public dislike of such localiti eee Coe

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POPULAR MECHANICS GOPHER HAS MECHANICAL FARM RIVAL interesting attach- t for use with a farm 1 has been placed market, which helps the farmer his soil. Instead breaking it with a hare into lumps later have to be n with a harrow, achine digs up the

J Ee “¢

The New Mechanical Soil Gopher in Action, Operated by a 85-Horsepower Engine: It Propels Itself Along as It Tills the Soil soil almost as a gopher does with its paws, and throws it back into a well-pulverized seed bed The tractor, which is of 35 horsepower, may, of course, be used without the tiller for general Details of the Construction of the Mechanical Badger, Showing the Hooks Which Act Like the Paws of the Little Animal, Digging Up the ane tages <0 the latter is Soil and Throwing It Back into a Well-Pulverized Seed Bed easily detachable.

a Ste eeae?

IHT, UNDERWOOD & UNDERWOOD AUTOS WITH ENDLESS TREAD SUCCESSFUL IN NORWAY 7 WO automobiles equipped with endless-tread traction, not long ago successfully underwent severe tests near Christiania, Norway, where they were made to climb steep hills, cross ditches, and traverse under- rush and deep snowdrifts. The endless tread, which is quite similar to the traction rig of the tanks ed during the war, enables the machines to travel at a good rate of speed under adverse conditions. The machines have finished bodies like an automobile, and the chassis is of the same type as that used on the ks that crossed the Sahara Desert recently, as recorded in the March issue of this magazine.

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928 TANK WATER HEATER USES NO COILED TUBES The copper coil of tubing found in most tank water heaters is dispensed with type of which in a new heater uses a The Construction of This Heater Embodjes a Depar- ture from the Usual Coiled-Tubing System. The Burner is Designed to Prevent Flash-Backs number of straight vertical tubes. The advantage claimed is that circulation of the heated water is very rapid, on ac- count of the small travel necessary. The heater is tested to a pressure of 600 pounds per square inch, many times the pressure it would be subjected to in or- dinary use. What is asserted to be a nonflash-back burner is incorporated with the heater, doing away with the an- noyance which frequently occurs when the gas pressure fluctuates. POPULAR MECHANICS DUTCH RADIO STATION SPANS 12,000-MILE GAP A new radio station recently installed at Kootwijk, Holland, makes it possible for the Dutch government to comm cate directly with its East Indian colo: without dependence upon foreign cab| as has hitherto been the case. A stat at Bandoeng-Malabar, Java, has equipped to both send and receive sages from Holland. The Kootwijk tion is a sending station only, mes being received at Sambeek, 20 away. This receiving station is equip with the most modern apparatus, in ing registering writing machines and chines that print the signs in reliet wax rolls, so that they can be re; duced vocally in much the same way a phonograph record. These instrum: are specially useful for automatically istering dispatches, as these are sent with great speed. MAMMOTH AUTO TRAILER HAS FREIGHT-CAR CAPACITY The rapid increase in transportatior truck has been followed closely by an crease in truck capacities to meet t growth, and finally by the rapid deve! ment of trailer trucks. Perhaps the | est of these yet to appear is now bei used in the transportation of automo! bodies, and is fully 40 feet long, ex: sive of a 10-ton truck which hauls around. It is of substantial pressed-st: construction, 8 feet wide by 12 in he and is roomy enough to accommodat bodies at one time. It is carried on two axles, one of which is the rear of the truck proper, but the tread is \ wide to distribute the load better. This Giant Rival to the Railroad Freight Car Bids Fair to Snatch Considerable Traffic Away from It. 8 Wide, and Holds 24 Automobile Bodies. Rounding a Corner utfit Is Something Like Swinging a Hook and Ladacr rruck around a Curve Is 40 Feet Lon by 12 High an with This

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er and the Small Snake Pit at the Rear of His Parking Lot opposite Los Angeles Courthouse: A Pit is being Built near Los Angeles for the Commercial Breeding of Snakes and Other Reptiles COMMERCIAL SNAKE BREEDING IN CALIFORNIA By ARCHE M. DUNNING \ UGE concrete-walled pit where ikes and other reptiles will be nd permitted to breed under sur- envi- ngs similar to their natural nt will shortly be hed near Grif- irk, Los Angeles, This novel idea ng carried out by tizen of Los An- well known hout the South- aS an expert on snakes and rep- e life. The pit will two acres, exca- below the level surrounding ter- ind inclosed by a and wide concrete ith a promenade \t intervals, sim- valls will cross the re tract, thus giv- visitors ready ac- to any section. 10st every reptile indigenous to the ry, with the exception of alligators crocodiles, will be found here. Near enter of the tract is to be located a Set: nt Rattler’s Fangs, of Which There Are 14 to Two Are Striking Fangs, Two Are Floating Fangs, and 10 Are Reserve Fangs a swampy pool for water moccasins of all obtainable varieties, spreading adders, and creatures of the lizard family that thrive in such surroundings. Rattlesnakes will, however, be the main attraction, and arrange- ments for the delivery this spring of 5,000 from a Texas dealer have already been made. Rattlers produce from 25 to 45 young in each litter, and the young attain maturity in one year. Conse quently, there will be no lack of “stock” once the pit is in active operation. Snakes will be sup plied to the moving- picture studios and for educational films Snake oil and venom will be marketed in quantities. The oil is said to be of value in the treatment of rheumatism and is in demand among mechanics who do finet grades of machine work TI eTe is a

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930 eight or nine days without injury. Rattlesnake skins are sought by manufacturers of novelties, and there will be no difficulty in dispos- ing of all that can be produced, it is believed. Close by the pit an additional half acre is to be simi- larly fitted up as a breeding place for rats and mice to be used as food for the inmates of the pit. The weekly bill of fare, at first, it is estimated, will to the rodents. feature of the pit. ee es steadily increasing call for the venom from physicians, chemists, and others, who use it for medicinal purposes. The supply is inexhaustible, for each snake may be deprived of its venom every be from 10,000 to 15,000 rats and mice. Vice versa, snake carcasses will be fed Papier-maché dens with hinged tops that may be lifted will be a This will afford an excellent opportunity to make a close study of the reptiles under various condi- a year. Only POPULAR MECHANICS

Extracting Venom from a Snake Whose Upper Jaw is Held over the Rim of the Goblet: Note Pool of Venom at Bottom of Glass rattles is

studying, capturing, and exhibiting rep- tiles, mostly snakes, for the better part of 35 years, is the authority for some interesting statements. “The rattlesnake is a gentleman among snake's age.

reptiles,” he says. “because he never strikes unless mo- lested, and even then gives his vic- tim timely and ample warning The ‘hoopsnake’ of folklore is a myth and the ‘jointed’ snake credited with disintegrating itself into living sections at will, ex- ists only in imag ination. Most snakes are ren- — dered dangerous only because of their own timidity and occasionally one dies soon after

capture, literally frightened to de Rattlesnake flesh is a succulent and licious edible, resembling frogs’ les flavor. and appearance. The numbe: certain indication Sometimes two rattles g one snake native to United States is ceptible to music. is the “silver race: found in California in many of the mid western states. |! snake is particu! charmed by the tw: of the jew’s-harp will approach witht few inches of the if the harmony | tained for a mode: length of time. The snake far experiences with started on his fat Iowa farm at the age of seven. On way to school one he climbed an apple tree in pursuit of a wood pecker that had dods out of sight into a kr hole. He plunged his

The Originator of the Snake-Farm Idea at Los Angeles, Playing with Some of ‘ . . { His Pets in His Private Snake Pit hand into the hol pulled out a blacksn that had half swallowed the bird. |< frightened to let go, he dropped to tions and in the various seasons of the year. The originator, who has been

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exas plains. ng a start there. of the esthetic “silver screen” and rately staged productions. 6 ein. te. Rint Right: The Snake Trainer and Two Moving- ture Men Watching Rattlers Used in Film Version of “The Virginian” with his gorged prize, and tak- home placed it in a box behind Nl. thrill of the capture remained with he hunted for more snakes and them to his collection until he rhaps a dozen. The neighborhood at one cent each, were permitted p. After a while, a carnival com- ith one “Bosco, the Snake Eater,” to a neighboring town. Bosco of the collection, rented a horse buggy (it was before the days of obiles), catme out to make an. in- n, and bought the lot for $10. ettled it as far as the amateur col- was concerned. Snakes from that on were his absorbing passion. habits, became the subject of his nt study, and their habitats his nt quest. travels have led him into the wild- tions of Old Mexico and over ster- He has captured the y water moccasin deep in the moss- Florida Everglades and in the en swamps of Arkansas. He has red for weeks the terrific heat of Valley in order to get first-hand mation regarding the reptile life of indy waste. When he first came to \ngeles, moving pictures were just It was before the Movies successful had to have an element velty and danger. Hence the ad- f “Hugo.” POPULAR MECHANICS 95 » — Los Angeles Expert Snake Trainer in the Garb of a Zuni Indian Chieftain, Doing an Indian Snake Dance with Two of His Pets Hugo was a South American python 22 feet 8 inches long, weighing about 160 pounds. He was, notwithstanding his size, the one snake that the collector ever succeeded in thoroughly subduing, and it took the trainer six months after his purchase to accomplish it. For hours at a time the man worked with the big reptile in a room 12 by 14 feet, with a padded pillow to ward off the blows of the savage jaws. Finally, however, the snake Hugo became so tractable that he would drape himself over a beam and coil the lower part of his body into a swing for his master. “The Coil of the Python,” a prehistoric cinema thriller, was Hugo's most notable starring vehicle. During the big scene of the production, the trainer allowed the python completely to coil upon him at the imminent risk of being crushed into a pulp. As a matter of fact, it took all his skill and 20 minutes of hair-raising effort to extricate himself at the conclu sion of the scene. He accomplished it by tickling Hugo in the tummy! The trainer's moving-picture experi ences all had their part in fitting him for the management of his pit, which he plans to make his future life work

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NEW TEAR-GAS GUN MAKES EFFECTIVE WEAPON A new tear-gas gun is being marketed for the use of police officers and other representatives of the law, to whom it is released only after record- ing the serial number of the weapon. It is designed to be used in quelling riots; in making raids, when t he inmates of a room can be subdued by discharg- ing thegas througha keyhole or similar open- ing,andin other work ) where _physi- = cal injury is to be avoided. The gun consists of two cylinders, each 2'5 inches in diameter and 7 inches long One cylinder is charged with air at 1,800 pounds’ pressure, and the other contains a tear-stimulating liquid which is vapor- ized through a nozzle by operating the air-cylinder control valve. BENDING DEVICE RENDERS OLD RAILS USABLE A rail bender, developed for use on an eastern street railway, was designed for the purpose of taking out the vertical bends from the ends of rails, caused by car wheels passing over the rail joint rhe bender, which is operated by a 3 ton jack, Ss — is made of several pieces of old POPULAR MECHANICS rail mounted on two movable legs, so to accommodate short or long bends The operation consists in passing a heayy yoke under the rail and over the jack which is then pumped up, bending both rail ends and plates slightly above levye! ays AUTO CAM GEAR INCREASES STEERING LEVERAGE A type of steering gear for automobiles just placed on the market makes use of a Cam-and lever arrange ment whic] greatly ir creases the lev era ge at the driving wheel and also hasten the turning action. The , cam, or r tuating me ber, is sit in appear tO a sing thread of vat pitch. It position t pitch ort cam is slight, a1 straight that in slow, SO driving considerable road shock is up before reaching the wheel. A motion pitch increases, however, the mot creases rapidly toward either extre: the cam; the result being that o1 slight turn of the steering wheel is 1 sary in rounding a corner. The mounted in ball bearings. Because rapid. action, great facility is giv parking a car close to the curb in gested districts. Left: Side View of Rail Bender in the Process of Straightening the Bent Ends at a Rail Joint. Right: E Showing the Yoke Rails, and the Brace Which Keeps It from Tipping nd View of Bender, hat Holds the 35-Ton Jack to the

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~ S_ eee SS Operator Using New Device Which Cleans Mud from Condenser Tubes, While Condenser is Operating, with a Jet of High-Pressure Water. Right: Contains over 50 Miles of %-Inch Copper Tubing Large Surface Condenser Which HIGH-PRESSURE STREAMS TO CLEAN CONDENSERS of the great nuisances in many plants is the mud and slime that + in the tubes of steam condensers. foreign matter is brought into the enser h is pumped ugh the tubes »l and con- the steam e outside of ubes. After a eeks’ opera- ie tubes have ry noticeable ng of mud; the necessity be cleaner e mischief by the mud uite apparent n it is remem- | that dirt is a conductor of ti tu it and acts as nsulating ma- inside the preventing normal action he condenser. ere area er of more of doing this cleaning, but with the circulating water of them require that the should be shut down. In a new device the condenser is fit ted with special plates on the shell oj posite one end of the tube nest. Each plate has a socket and check-valve at rangement through whichanozzle may be _ inserte: and high-pressure water turned o1 so that the nozzle condenset Above: denser Tube. Sectional Below: tion of a Surface Con Action of Steam around Tubes, and Accumulation of Condensed Steam in Hot Well or less mechanical most shoots a stream of water into eacl tube. The force of the water jet dis lodges any col lected dirt, and after a few mo ments’ application the tube has been literally scoured clean. The socket constructed View of aCon- that the nozzle Longitudinal Sec- may be turned denser Illustrating 2 1S SO about until it has played over every tube within the range of that particular plate. Othe: plates give access to the other tubes

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SOME NOVEL AND LITTLE-KNOWN ACCESSORIEs This Spool Serves as a ’ : Pincushion, and Has a ., mh \ is the on” — *tRighe ’ ; ser : ; Claim for This Lamp, : : - a The Barrel Portion is : Filled with Cotton

A Knife - Edge Sheet of aid Water is Used in this Dish- washing Appliance for Cleaning All Kinds of Tableware and Dishes. Its Action upon Grease Is Similar to That of a Razor, and the Cabinet Eliminates All Splashing

ps : is ing Board Is That It Lies Flat 5 y against the Wall When Not in Use. A Hinge Permits the Board to be Swung Out Horizontally

T he Spout on T Coffeepot cannot Broken Off, for t

Reason That It None. Even the Handle does N Project

This Device Is for the Kitchen Wall, and Has One Connector Plug and Three Electric Out- lets, to Keep Several Dishes Cooking at Once

Combination Chair and Bed, for Both Day and Night Use: The Back Is Adjustable, and thing New i il : Something dew in Ol Stoves: The can be Tilted to Suit the Convenience of the Burned Fuel is Vaporized and Con-

letely, with User. It Is Very Comfortable, and can be — — helf ‘Ys Sufficiently High Used Where There Is No Room for a Full- to Permit the Use of a Wash Boiler Sized Bed Anyone wishing further information on devices in the editorial pages

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INTENDED FOR THE HOME AND ITS MEMBERS Center of This f Hinged Metal Is an Electric Ingeniously Con- When Not in Use Attractive Toilet sory, Which tains a Silk-Fiber and a Generous oply of Powder The Tilting Top on This Table Allows It to be Taken through a Door- way without Removal from the Legs. When House Cleaning, the Top is Quickly Tilted, and Moved Out of the Way. It Has Twin Pedestal Legs, Mounted on Cast- ers, So That It can be Rolled About Easily Butter can be M ade Quickly in This White-Por- celain Churner. Turning the Crank Results in a Rock- ing Motion, and the Transparent - Cellu- loid Top Makes It Easy to See When the But- ter Comes Rugs and Carpets cannot Slip When This Netlike Fabric is Secured to the Underside. It is Impregnated with Live Rubber, and: Aims to Prevent Accidents \ A Light That Is Easy on ; the Eyes Results When ~ T his Shield is Slipped over the Bulb. It Comes in Sizes to Fit All Bulbs Ice-Cream Making Is Easy with This New Stand for the Machine. It Weighs Only 3%, Pounds DORA ceiat RUS nn eee y * Nie 29 0 iy. This Chair Is an Example, Are the Prod uct of an Eastern Manufacturer. They are Woven by Hand from Sisal, Hemp, or Cotton Rone, by a Patented Process » Cnicago 135

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936 A clogged oil filter is worse than use- less, and heretofore the insuring certainty of un- interrupted operation has been frequent inspection. The result is that the POPULAR filter only method of Left: The Small Rec- tangular Box, Connected with Pipes to the Left Side of the Oil-Filter Reservoir, Contains the Alarm Device Which Rings a Bell When the Filter Bags become Clogged and Overflow, Thus Warning the En- gineer or the Attendant, That the Filter Bags Need Renewal or Clean- ing. Above: Top and Side Views of Alarm Bells and Tilting Two- frequently overflows, or the flow of oil to the lubri Compartment Tank BRANCH OF YALE COLLEGE SUCCESSFUL IN CHINA “The College of Yale in China,” a branch of the American college of that name, now has an enrollment of more than 500 men. This school was founded in Changsha-Fu, the capital of the prov- ince of Hunan, in 1906, with 13 students. Since then, the Yale alumni have been most active in supporting the institution, financially and otherwise, and it has pro- gressed steadily. It is said that its school of medicine is one of the largest and finest in China. All instruction is given in English. EMERGENCY DEVICE REPAIRS BROKEN AUTO AXLES A simple device for making emergency repairs in the case of a broken car axle is now on the market. The device which can be carried in the tool kit and can be installed with a wrench, will enable the autoist to travel under his own power MECHANICS OIL-FILTER ALARM WARNS OF CLOGGING becomes flooded cated parts is less t} the requirements. alar-m In new device, an automat is incorporated which gives ample warning when the straining bags begin to The support- clog up. ing rings of the bag are made with an over flow spout which con- ducts the unfiltered partment tank, attached toatransverse pivot and free to rocl As shaft from side to side. to atilting, two-con one of the compartment becomes filled, the tank t h a ft overbalances to side, and discharges it contents, causing striker to ring a gong > At the same time other tank compartm is brought under the « stream. This action c tinues as long as the « trom t! overflows clogged filter bags. to some shop where permanent rep can be made. steel bushing slid over broken axle, to which it is held by a cial locking pin and asetscrew. The bu ing carries at its outer end a stub on which HOLE FOR INSERTING \ LOCKING PIN 4 EMERGENCY AXLE the wheel is mounté \ BROKEN AXLE Above: Sectional View, Auto Axle Fitted with Device. Below: Showing + \ It consists of a harden: which is + e Broken Emergency-Repai' Side View of Repaired Axle

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POPULAR MECHANICS 937 Left New Motor for Use with Temperature-Control Apparatus, Which has Transformer Built into It and Is Ready for Connection to Supply and Thermostat Circuits. Right: Gear-Case Cover Removed, Showing the ‘“‘Figure-Eight’’ Reduction Gearing NEW MOTOR FOR TEMPERATURE- CONTROL APPARATUS \ new motor adaptable to temperature- trol apparatus, either in connection ith thermostats for residence heating for industrial purposes, is built in- ral with the transformer, and is pro- led with leads ready to connect to the ipply circuit. It is inclosed in a dust- tight casing and provided with a pressure- ing system that requires but little ttention. It transmits energy through a in of “figure-eight” gears, to a crank 1 a lifting power equal to 100 pounds 1 inch from the crank center. NONCORRODIBLE COPPER CAST UNDER HOT WATER Copper castings are rendered noncor- dible by casting the metal at high tem- rature under hot water, according to method that probably originated in pan, where it is widely practiced. Ar- les known to have been produced in is way, are unaffected after 35 years, due to the protective coat of cuprous de formed from the decomposition of e film of steam which separates the hot etal from the water during the casting peration. PARKING LIGHT FOR AUTOS WORKS BY CLOCK \n interesting attachment for prevent- ng collisions has been invented recently, and will be a boon to automobile owners who park their cars in front of their nomes for the night. The device con- sists of a clock mechanism which is elec- trically connected to the parking lamp, and which can be set to turn on the light at any predetermined hour, as, for instance, when it is just getting dark. If the car is to be parked at the curb all night, the clock may be set to break the circuit to the light at any desired hour A Sectional View of the Clock-Driven Mechanism for Automatically Switching On or Off the Parking Light in the morning, whenever dawn is break- ing. A master switch permits breaking the circuit at any other time, regardless of the clock. q Our Bureau of Information is for your benefit. Use it as often as you please.

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938 POPULAR NEW DEVICE CUTS AND CORES GRAPEFRUIT An interesting machine now ready for the market cores grapefruit and cuts it

2 Device That Cores Grape- > fruit and Separates the Meat from the Outer Rind with Speed and Neatness 2 from the outer rind. In the main, the machine consists of a pair of curved blades supported from a carrier hinged to an inner toothed ring, that gives the blades a combined up-and-down and rotary movement. The ring is in turn carried on an outer fixed ring, which also supports the driving mechanism. Below this is placed the half grapefruit in a cup- shaped holder, that is forced upward by a handle against a ring that fits the cut edge of the fruit. The machine said to do neat, clean work about five times as fast as it can be done by hand. 1S HUNDREDS ANSWER INVITATION SENT VIA RADIO BY MAYOR In dedicating a new broadcasting sta- tion in San Francisco recently, Mayor Rolph spoke into the transmitter as fol- lows: “I want to find how far my voice carrying—how big my audience is. Send in telegrams to me and send them collect. Come on, Mayor Hylan of New York, and you, Mayor Curley of Bos- ton!” Responses came from every state in the Union, Honolulu, Canada, and from a ship 1,000 miles at sea. It was estimated that $3,000 worth of replies arrived within a very short time. Some of the more interesting were dis- is ones MECHANICS played in the window of a local telegrap| company which handled the deluge incoming messages. ADJUSTABLE WINDOW SASHES FOR ANY WEATHER A multiple-sash window, whose severa| sashes slide horizontally in the wind trame, has been developed recently an will permit adjustment to suit any ex- ternal weather conditions. Two or more sets of sashes may be mounted in t! frame, of which one set may be provided with glass, and the others with screening, or Venetian blinds. In t! winter all may be fitted with glass, insu ing an absolutely weather-tight wind for keeping the cold out. Horizont grooved frames, invisible in the wind wall, receive the flanged rollers vy which each sash is provided; and t wall is recessed, of course, to rec: those sashes which are not in use. sides of the frame proper are also |

= cf

Multiple-Sash Window, Composed of Two or M Sets of Parallel Sliding Sashes Which <an be Rolled Horizontally into the Wall vided with a stop catch to limit the mo ment of each sash.

@A moderate-priced automobile is no being introduced that has an air-coo motor with copper cooling fins elect cally welded to the iron cylinder casti The advantage lies in the superior he conductivity of copper, which is abo nine times that of cast iron.

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POPULAR MECHANICS 939 C Simple Rig Devised by an Enterprising Farmer for Getting Heavy Stones Out of His Fields: One Pair of Horses, Pulling on a Rope around the Large Wooden Wheel, will Raise a Six to Eight-Ton Rock Out of the Ground HOMEMADE DEVICE HANDLES HEAVY STONES \ resourceful farmer of the Northwest rigged up for himself an odd-looking e which he uses to lift heavy stones t of the ground and to haul them out he field. The device, which is mounted i frame built up on four wagon wheels, ists of a 5-foot-diameter wheel at- ed to a piece of 6-inch well curbing, und which is wound the chain that pples the rock. One pair of horses ling on a 2-inch rope encircling the l, will lift out of the ground a 6 to mn rock requiring four horses to haul load is held in the raised position by ever-operated piece of timber that across the frame and locks with ne of the crossarms of the wheel. c¢ SOUND-WAVE “FILTER” MAY ELIMINATE NOISES \n unusually ingenious device has been vented by Prof. G. W. Stewart, of the liversity of lowa, for suppressing, or minating entirely, undesirable sounds like previous attempts along these nes, Professor Stewart's principle is not put obstructions in the path of the wanted sound waves, but instead to ause successive sound waves to inter- iere with each other’s transmission. Cy- lindrical tubes are used for this purpose, pen at both ends and free from obstruc- ons, but having, at regular intervals, ‘ branching tubes and chambers. At each branching point waves are reflected back- ward through the tube. The inventor calls his device an “acoustic wave filter,” and believes that it may find application in telephones, phonographs, and other musical instruments, so that these ma chines will make audible sounds desired. only those RATCHET SCREWDRIVER HAS PISTOL GRIP An improved type of screwdriver has recently appeared on the market for han dling large or stubborn screws with much greater ease than is possible with the o1 dinary straight-handled tool. A _ pistol grip is provided with this tool, which is of the ratchet type, enabling the operator to exert a powerful leverage even when the hands are wet or oily. In addition, The Nonslipping Handle of This Pistol-Grip Screwdriver Prevents a Mechanic's Hands from Blister- ing. It Takes Several Blades it has the advantage of being able to take a series of interchangeable blades AP SKp

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940 POPULAR MACHINE CUTS RUBBER BANDS FROM OLD INNER TUBES Inner tubes that have passed their use- fulness as part of a pneumatic tire, are tt : New Machine Which, by Means of a Special Saw, Converts tached to ld Inner Tubes from Pneumatic Tires into Elastic Rubber Bands at the Rate of 20,000 an Hour now being converted into elastic rubber bands by a man who has designed a machine for this purpose. In this ma- chine the tube is automatically fed to a special saw that cuts off the bands at the rate of 20,000 an hour, and drops them on a conveyor. It is expected that the moderate price at which they can be offered will find the bands a ready mar- ket, as a substitute for wrapping twine, in many retail stores and in factories that put up merchandise in small packages. TIRE DEFLATER LEAVES HANDS FREE FOR OTHER WORK A simple device for deflating automo- bile tubes has been placed on the market recently which can be readily se- cured to the valve to keep it open when necessary. Only slight pres- sure is necessary to clamp the de- vice to the valve stem, a small pin keeping the valve spring down and permitting air to escape from the tube. The hands are thus left free to do other work. MECHANICS HYDRAULIC-DREDGING METHOD APPLIED TO PEAT DIGGING Excellent results were attained cently in the extraction of peat f: presence digging so the extensive bogs and moo: Finland by the use of water for tearing up the raw peat. 8 this method the resulting plast mass is free from stumps, t which makes hand uneconomical. | water jets, of from 225 to 300 pounds’ pressure, are fed by 330-gallon per minute pump, a: cut up the outer layer of p: like knives. is then further diluted, so that can be pumped like water, the meanwhile being thoroug mixed by the blades of the pu at the rate of 4,000 cuts per 1 ute. The stumps, which are | bare and thoroughly cleaned the action of the water, are The resulting p: : to pieces with large shears the pump cart, then disposed of. yard, the thin peat pulp is In the dr lowed to settle in layers about 10 in thick, the excess water evaporating ELECTRIC ALARM PROTECTS BANKS FROM HOLDUP surglar-alarm equipment, for ban} and similar institutions, is being provi in the form of an electric siren that can be sounded from any one of a number of dif- ferent points. A central relay switch, to which the lighting cir- cuit is connected, operates the siren whenever contact is made at a start- ing station. At each starting sta- tion is located a foot - operated push button, and at some conven- ient point a push button which stops the siren. The siren is op- erated by a uni- versal electric motor, and the relay switc! is independent of current for contact a

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POPULAR MECHANICS 941 View Shows the Suction Dredge in the Foreground, and the Flume, Supported on a Trestle, Which Carries the Pumped Gravel to the Storage Bins in the Background. Here the Gravel is Screened, Sorted, and Stored for Shipment. To the Left of the Bins, a Bathhouse Is Visible SUCTION DREDGE GETS GRAVEL FROM BATHING POND For years the residents of Cowles, Neb., had been compelled to get all their ding gravel from outlying districts, ause of its scarcity locally. What lit- tle there was, was of poor quality, mixed th dirt and clay, and unfit for use. Juite by chance, an observing farmer covered that there was a fine deposit clean gravel in the bed of a near-by nd, which had been very popular for bathing purposes. At first this was un- covered in small quantities, but finally a uction dredge was installed to meet the pidly growing demand. A dynamo on bank of the pit furnishes power for e pump equipment, and is fitted with flexible connection to permit the dredge ut in the pond to shift its position readily. A flexible flume, with its mouth ried in the gravel at the bottom of the ond, is carried on a trestle, and con- veys the pumped material to the bank, “SAFETY-FIRST” GUARD RAIL ENVELOPS CAR The ever-growing extension of auto- obile traffic, with its accompanying in- crease in automobile injuries and fatali- ties, has stimulated the invention of nu- merous appliances, designed to minimize he effects of collisions. One of the latest of these to appear on the market is an all- steel rail inclosure, about 1 or 1% inches in diameter, which completely envelops the car, following the fenders and run- ning board. It is claimed for this attach- ment that, when resiliently braced against A Spring-Steel Guard-Rail Inclosure Which is At- tached to the Car Frame and is Designed to Absorb the Shock of a Collision the sides of the car, it provides sufficient recoil against shock to prevent bucklin of the chassis frame. @ Real estate is being sold “over the counter” at a Chicago department store as part of its regular “merchandise The practice is said to have jong been customary in London department store

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942 POPULAR MECHANICS ARMY .45-CALIBER PISTOL MAY BE CHANGED Interesting recommendations have gone torward recently from the U. S. Cavalry board to the chief of cavalry governing modifications to be made in the regula- tion .45-caliber automatic pistol. One important change rec- ommended is that the main- DIFFERENTLY SHAPED SAFETY LOCK en “)

fi spring hous- , ing be bulged SHORTER TRIGGER e . (cke FRONT SURFACE CHECKED and checked, thus eliminat- ing the tend- BULGING MAIN-SPRING HOUSING. ency of the giieaceointpekaemtem eee ee pent low when held in the natural grasp. <A_ shorter trigger is also recommended, because it reduces the distance from the back of the grip to the front of the trigger and therefore allows a man with a small hand to grasp the pistol more comfortably. It is also desired to change slightly the shape of the safety lock, so that it will not pinch the skin. Ten sample pistols, incorporating these changes, wére tried out in pistol practice with unitormly satisfactory results. The changes can be made with but slight additional ex- pense, and it is believed that they will make the automatic pistol an even more satisfactory weapon than it is at present. Definite action approving these modifica- tions is expected shortly. FILED OUT ON BOTH SIDES OF RECEIVER REDEEMABLE METAL TOKENS USED BY MILK COMPANY The handling of paper tickets, at tim: a troublesome problem for both custo: and dealer, has been solved by a weste milk-distributing company by the use aluminum tokens which are redeemab!| at their face value in milk. The pape: tickets had several serious disadvantage among which may be mentioned the a: noyance of extracting them from empt bottles, the heavy cost of printing, a: the expense involved in employing a st solely for counting, checking, and destro ing those turned in. Now the driver buy $100 worth of the metal checks, sells the: to those desiring milk, and later uses th: same ones over again. SIMPLE CARD INDEX INTENDED AS CALENDAR MEMO FILE A simple desk-calendar memo file been made with a card-index arran ment. A card designating the month is placed first in a small built-up tray, open in front, while through a hole in the card’s center can be seen an- — other card with the day of the month printed upon Behind these daily key cards are kept t! plain memo cards.

DOUBLE-BLADED GARDEN With the ordinary garden hoe, on account of the shape and blunt- ness of its single blade, considerable effort is re- quired to force it into the ground, and it is not _adapted for digging out weeds easily, or cut- ting off the stems of tuberous plants, such as potatoes. All these things can be readily done with a two-bladed hoe, recently pat- ented, which has the blades extend- ing outward from their connection to ; the handle and terminat- ing in two sharp points.

Front and Side Views of a Very Effec- HOE WITH SHARP EDGES From these points the blades slope toward ea: other until they near! like knife blade with sharp edges. @A French dealer in an tiques is said to be the habit of acquirt wood - boring wor im with a taste for furni ture. Some of these li feeds on his own new furniture to give it more venerable appeat ance, while the rest aré sold to other dealer Formerly worm hole . tive Hoe for Cutting Tubers ways.

meet, and are shaped were simulated in crude:

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CHILDREN’S PICTURE-STORY DEPARTMENT > A New Vehicle for the Kiddies Which is I pelled with a Motion’ Similar to wing, and is ered with the Feet: It is Also Seen an Exerciser for some of the Mothers Major Clarence Weighs Only 17 18 Inches High, is Into the Jaws of Death: This Lon- don Zoo Keeper must Be on Pretty Friendly Terms with His Charge to Place Him- self So Smilingly within the Maw of a Hippopotamus ae - “ y - Wags: nh eseersy o> = COPYRIGHT, UNDERWOOD 4&4 UNDERWOOD ee = — Howerton, Who Pounds and Stands Believed to Be the Smallest Adult in the World—and He is Attempting to Pull a Truck Load of Giants Whose Combined Weight Is About 1,000 Pounds. The Shortest Is 7 Feet 4 Inches Tall EE

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944 POPULAR NEW TRENCH FORCE PUMP HAS CONVENIENT FEATURES A new type of trench force pump has a number of features that will appeal to contractors and others having to drain Portable Unit, Consisting of Gasoline Engine and Force Pump for Handling Dirty Water: The Pump Has an Outside Packed Plunger, and Interchangeable Poppet Valves for Suction and Discharge MECHANICS muddy and gritty water from sewers, ditches, and excavations. It will deliver water 10 to 80 feet above the pump, or through a hose or pipe from 100 to 1,000 feet long, and js fitted with an outside packed plunger as we! as interchangeable poppet valves for suction discharge. The unit co: sists of the pump a gasoline engine, or elec tric motor, mounted on a truck, and its useful ness is further increas by a winch head capa! of a 500-pound pull. @ Night air service tween London and Pa: with planes leaving ea city at 6:30 p.m., is n being undertaken as experiment. Grou: lights every 30 miles a colored signals from t! airplanes are planned COMB ON BARBER’S SHEARS INTENDED FOR HOME USE Another device intended to make hair trimming at home easier has recently eae =e Hair-Cutting Device for Home Use Which Consists of a Pair of Barber’s Shears with a Comb Holder Attached to the Underside been patented. It is an ordinary pair of barber’s shears with a holder of metal, attached to the underside. A comb is slipped into this holder, and the operator proceeds with the work much in the man- ner of a person using a pair of clippers. The comb is readily removed for the pur- pose of cleaning. q Our Bureau of Information will answer all questions regarding articles appearing in this magazine. NEW TIRE-RIM REMOVER UNUSUALLY POWERFUL A newly invented device for contract ing rims to remove them from a ti requires much less power in using th: other similar tools. Two strong jaw opened and closed with bolts and win: nuts, grasp the rim on each side of t! joint. The alinement of the ends broken with a specially: designed leve: Then, by working a ratchet, a scre When First Applied, and at the Left with the Rim Ends Out of Line shaft is rotated, which operation pul! the jaws together, contracting the rim till it lifts off the tire. It is said a tiré can be removed and replaced in about two minutes. T ,

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Intormation as to wrere to obtain anv specineda * materials or parts for making objects described in the following pages mav be had. on request, —~=>§ from our Bureau of Information —Editor. All Shop Notes published in 1922, in book form—Fifty Cents—from our Book Department. Concrete Runways Aid Car Repairs By GEORGE A. LUERS runways shown in the illustra- edges of the hole. If there is a cement n will prove of great convenience T irage or repair shop, public or they are far easier to make than | can be built in a few hours. ple wooden form is made as in the lower right-hand corner; form is necessary, although two floor in the garage, it will be sufficient to chip it out to the dimensions of the in- side of the form and about 1% or 2 in. deep, and to wet the rough chipped sur- face thoroughly, to allow the new con- crete to bond with the old. The main form being set in place, the FORM FOR GROOVED FACE OF RUNWAYS ‘ae’ shat _- REAR OF GARAGE INTERIOR VIEW OF GARAGE SHOWING CONCRETE RUNWAYS 1ySs may be Placed Anywhere Convenient, peed the work. When the location he runways has been decided upon, avations are made, about 2 ft. deep a little shorter in length and width the form, to allow it to rest on the SS} DETAIL OF WOOD FORM Easily Made Concrete Runways That Take the Place of a Pit in the Public Garage or Repair Shop, and Are A Suitable for the Private Garage: The Dimensions Given Are Suitable for All Standard Cars. The Although Preferably Opposite a Window, to Provide Plenty of Natural ight V-shaped form for the grooved runway is set on top of it, and clamped in place by using C-clamps on the battens on the side of the main form; a mixture com- posed of 1 part portland cement to 2 ~ 945

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946 parts sand is poured in, and thoroughly tamped with a long iron rod, poking all corners well, to insure that there will be no pockets or unfilled places. The depression in the top of the run- way that holds the car wheel is formed with a trowel or similar tool, while the concrete is still soft, and the form is al- lowed to remain for at least 24 hours, when it may be removed and used for the other runway. The runways should be kept thoroughly wet for about 10 POPULAR MECHANICS

days, when they may be put in service Fe! The car is simply driven up the runway. slowly, under its own power, the depres. sions in the tops preventing it from be. ing driven over the back. The dimensions shown will be suitable for most cars, and the runways should be 56 in. center to center. They should be set near a window, to provide sufficient natural light, and far enough from th: wall so that the work on the car can } performed with comfort.

New Method of Lowering Quarry Floor The lowering of a quarry floor is usually a most laborious operation. The original

quarry is generally cut to about the ~— ooo _—s DT re ete ti ra : sane MN 2° 4 r¢ OLD..QUARRY.. FLOOR ’ \ : / a i. \ v: H ‘ »~ | \ H & . 4:2 ' ei DRILL HOLES‘ f { 15" DIAMETER? \ @) 30° DEEP ' ) H / ' r] ‘ \ 3 ‘ \ / \ ~ ‘ ( ae ; \ ik / 7 "4 % Peete ieee Bb he < ‘ NEL: CRUSHING weak. 73 Not PLANT ‘Su

A Time and Labor-Saving Method of Lowering a Quarry Floor to a Depth of 25 Feet below the Original Floor, by Blasting a Large Area ground-water level, and, in making a new cut below this level, the common method is to blast out a small hole, remove the stone with a clamshell, or by some other method that is just as tedious, and then pump the water out. After that a shovel is let down into the hole, and the hole is enlarged to a proper working face. A new method, recently employed in an Ohio quarry, is to drill a large area with blast-hole drills, as in opening a new quarry. The entire area is shot at once with heavy charges, to break up the rock as much as possible. In this case an area, 300 by 72 ft. in size, was drilled and broken to a depth of about 25 ft. Holes, 15 in. in diameter, were then drilled close to the edge of the broken-up area, to a depth of about 30 ft. These holes, of course, were driven through broken and shattered rock, and were lined with old screen plates. Suction intake were let down into the drill holes, and th, entire area was pumped out. A stea: shovel was then set to work at the ed of the blasted area, and worked down to the new level. Internal Limit Gauge While internal limit gauges, for cleter- mining the minimum and maximum lowable sizes of holes, are usually ma: to distinguish the “go” and the “not-¢ ends, the figures or letters are quite small - and they must be read each time so that 4 the proper end may be used. ; To eliminate this trouble, we knurled bs all our gauges on the “not-go” end, ‘ that the inspector would know, by fee which end he was using.—J. H. Toronto, Can. Moore Slide for Tool-Chest Drawers There are several types of slides used for tool-chest drawers, but the one illus- trated is novel and will be appreciated by wood- workers. The slide is metal, and is used on a tool bo | having open _ tront similar a machi tool chest i brass f nel is scre to eac! of the drawers, and brass strips, an fit in the channels, are fastened to sides of the box, as_ indicated. metal slides have a long life, do not nor permit the drawers to rub agai each other, and support the drawe!

BRASS CHANNEL--~7 SIDE OF DRAWER-- SIDE OF BOX ------

firmly when the latter are drawn al! all the way out.

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ee! re POPULAR MECHANICS 947 Fence-Post Attachment Made of Pipe n it is desired to run a slanting nce on the top of the poultry fence, slats, nailed to the fence posts, erally used to support the wire; ese, however, are not as a rule satisfac- they are neither as strong as the ould be, nor do they last as long ired. \ better and more substantial type of t can be made from 2-it. lengths of ttened on one end for a distance of 8 and bent to a 45° angle as shown. ipper portion is slotted with a heavy blade, for the reception of the barbed wire, and the flattened portion is nailed to the outside of the fence post ng spikes. Paint, applied both in- te and externally by dipping, will e pipe from rusting. r the wire has been pushed into the and has been pulled up tightly, a vith a light hammer on the edge of t will clinch the wire. This ar- ent is the simplest and most effec- wheel hand truck, have been found to fa- cilitate this work greatly. The arms are A Slanting Fence se That Keeps the Poultry in the u Yard: The pports for the Barbed Wire are Made of Pipe way of fastening the wire to the e—J. V. Romig, Allentown, Pa. Truck Attachment for Handling Armatures is usually a difficult and time-con- ming task to move heavy armatures, they must be handled with great care rder to avoid damaging the winding, mutator, or the shaft. A couple of arms, attached to an ordinary two- Attachment for Hand Truck That Facilitates the Handling of Armatures: With It One Man can Handle an Armature That Ordinarily would Require Two Men bent as shown, faced with sheet lead, and bolted to the truck in place of the regular bracket. Armatures up to 15 and 20 in. in diameter, or other machine parts mounted on shafts, can readily be handled by one man on a truck of this type, pro- viding, of course, the length does not exceed the distance between the arms.— Chas. J. Le Compte, St. Louis, Mo. Rack for Drying Blueprints Drying blueprints on a rack, as shown in the drawing, is a considerable improve- ment on the usual method of drying them over a line. A _ tri- angular frame of wood is built, as shown, the wooden er@ett« pieces hav- ing a number of small spikes driven through them so as to project about ™% in. in front. The crosspieces are set far enough away from each other to allow a good circulation of air around the wet prints, when they are hung on the points to dry. A pan underneath catches the water dripping from the prints. aS ‘DRIP BLUEPRINTS PAN

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948 POPULAR Height Gauge Made from Planer Gauge The addition of a blade to the common planer gauge provides the mechanic with a very satisfactory height gauge. The blade is made of tool steel, groundtoa knife edge, as shown, slot- ted, hardened, and tempered, and the bot- tom surface ground true. The knurled : screw that N fastens it to the gauge has a thread of the same size as the regular extension blocks for the gauge. The gauge is set, in the usual manner, with an outside micrometer, and the blade then clamped in place. With the use of the extension blocks, the gauge has quite a wide range of adjustment.— G. W. Nusbaum, Takoma Park, D. C. -- BLADE --- =e | PLANER GAUGE ---> ° EXTENSION “--~- BLOCK Extractor for Locomotive Brasses Many railroads are compelled to main- tain small repair shops at outlying points to take care of engines running on branches, or shifting at junction points, and, as these shops are not usually fully equipped, many ingenious labor-saving devices are devised in the shops them- selves. One place, not equipped with a drop pit, was experiencing considerable trouble in removing jour- nal bearings from engine-truck and trailer-truck boxes, as_ these were slid into the box from the cen- ter of the engine, and it was ex- tremely — difficult to obtain any hold on the bearing when in place in the box, even after the “sponging cellar” was re- moved. The extractor illustrated was found to lessen the trouble considerably. After removing the sponging cellar, the engine is jacked up, and a chisel inserted between the crown of the brass and the box. An opening is thus made into which the extractor is thrust, far enough for the lip on the end to catch the inner side of the brass. Then, by using a MECHANICS wrench on the square head of the loge ) screw, the bearing can easily be with. drawn from the box. With a bearin, that has run hot enough to melt the bab. bitt, and where the latter has run down over the axle and cooled, this has proved to be about the only method of replacing the bearings without dropping the wheels. a practice that is not always applicable in small repair shops.—C. A. Sprout, Lan- caster, Pa. Trick Lock for Workbench Drawer A trick lock for the workbench drawe; is shown in the drawing. An ordinary but hinge, with one leaf fastened to the un derside of the Q drawer, as indi- cated, so that the 7 loose leaf will drop down of it- self, is all that i necessary. A false bottom is nailed under the dr to conceal the A Sm il] Si BOTTOM OF ‘j -DRAWER ¥ ' hinge. — | hole is drilled i F. . } pence |_ BOTTOM this bottom, di 1 rectly under t! hinge, so that the movable leaf can b pushed up with a pencil, or with the finger, to permit it to be passed over t! lower edge of the drawer openings the bench. When the drawer is closed, the leaf drops down, and prevents th: drawer from being opened by anyone not acquainted with the secr t. Flushing Sewer by V ater Pressure When a sewer becomes clogged wit lint, as is often the case in laundries is quite a problem to clean it out t! oughly and quickly. It has been found pressure is about as good a means of flushing the sewer as any. The water main is connected to the sewer above the trap, as shown. The con- nection is, of course, made as tight as pos- sible, so that it will be waterproof and that water und conside! pressure without blowing out. A method of connecting is to use a cou ling that will fit inside the sewer pip at one end, and reduced at the oth stand

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| 1On¢ with- aTing bab- down “Oved acing 1eels, cable Lan- Wit

2? in, and to stuff the space between ng and pipe with rags. Then, by edging and bracing the coupling in lace with a few heavy pieces of lumber, the connection is made secure. A 2-in. then connected from the coupling water main. ter, under pressure of about 60 then turned on, and the obstruc- ill be forced away. By employing eans, the expense and time of dig- ip the sewer are eliminated. Radius-Finding Tool tool shown in the illustration will und very useful to machinists, pat- ikers, and others With it the diameters of _ SHEET-METAL l>\ broken gear ARMS / wheels, pul- ~< ---2// /, Wy leys, and HY other parts, P of which : // / only a por- ‘ \ry tion of the la IH rim remains, can be found, or the radius of any are determined. It consists of two arms, cut from sheet metal

A ; y POINTS--- Y. to the shape

shown, and | along their centers, to fit a small ping screv with a flat head. Two are filed on the end of each arm, ndicated inythe drawing, on a line re with the centers of the arms. Vhen in use, the four points are brought contact with the curve or arc, and nut tightened. The flat head of the has a fine mark in the center, and urements may be made with a pair lividers from this mark to one of the points. A wide range of radii is covered this tool. Cementing Gasoline-Line Couplings \Vhile working on gasoline equipment, ich as stove burners, one will often find union or coupling that leaks, no mat- ter how much white lead or other com- pound is applied. It has been found that it the ends to be connected are given a ral application of ordinary liquid glue, htened, and allowed to dry, the joint be permanently leak-proof. POPULAR MECHANICS 949 Novel Spanner Wrench The illustration shows a spanner wrench that can be used on a large variety of work. It is made of bar stock, bent to the shape in- dicated, with = the ends over- —)) lapping for the length of one side. A number of grooves are filed between these ends, as shown, to al- low the inser tion of small pins. A bolt or screw pass- ing through OE , both ends en- ables the pins to be clamped in position. By having the grooves cut uneven dis- tances apart, almost any desired spacing can be obtained. If necessary, a handle can be passed through the wrench to ob- tain greater leverage

Pulling Pump Cylinders The tool illustrated was improvised to pull up a pump cylinder that had failen to the bottom of a well, and was found very satisfactory. It consists of an iron bar, to one end of which two iron dogs are loosely pivoted, as shown, on a rivet extending | through both il 4 dogs and the bar. a Gel Small pins are | driven into holes drilled in the bar, below the dogs, to keep them from falling below a horizontal posi- tion. Both dogs are pointed at the end, as indicated, and, when horizontal, meas- ure a littke more across than the inside diameter of the cylinder. The bar is threaded at the upper end, a length of . 34-in. pipe screwed onto it, and the de- vice lowered into the well, additional lengths of pipe being screwed on, until the bar strikes the bottom of the cylinder Upon pulling up on the pipe, the dogs dig into the wall of the cylinder and allow it to be lifted with ease —Ed. Henderson, Lake Mills, la.

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950 POPULAR Shield for Post Holes When setting up large posts or poles, a considerable quantity of dirt is usually pushed into the hole by the end of the

POLE. ~ FLANGED METAL SHIELD ‘SECTION

A Metal Shield That Prevents Dirt from being Pushed into the Hole When Setting Up Large Posts or Poles pole, and this very often must be removed in order to sink the pole tp the proper depth. To eliminate this difficulty a sheet-iron shield for the hole has been found very useful. The shield consists of two semicircular lengths of sheet iron, to which a split flange is riveted, as shown at the right. The exact dimensions of these parts, of course, depend on the diameter of the poles, although the dimensions given in the drawing will serve in most cases. The guard is inserted in the hole as in- dicated, and can easily be removed after the pole has been set in place. Tool Holds Auto-Cylinder Blocks for Preheating An Indianapolis welder uses the simple but ingenious tool shown for handling automobile-cylinder blocks in a preheat- ing furnace. It is usually necessary, when preheating the blocks, to turn them over often, and this tool reduces the labor re- quired to the minimum. The apparatus consists of a short piece of 3-in. pipe, welded to a long piece of 2'4-in. pipe, which is drilled for a cross handle. PLATE -- (a

' ' ' ' ' } ' ' Yh ye j aA \ tpt WH ay -- WELD I COLLAR | J > S “SETSCREWS \ 3’PIPE 25 PIPE “IRON TABLE HANDLE Simple Rigging Used for Handling Automobile-Cy der Blocks When Placing Them in a Preheat Furnace, or Removing Them for Weldin and the block replaced. Ther: lifting, no loss of time, an heat—L. C. Land, Greenfi

ened, no heavy waste of Indiana.

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Building a Small Horizontal Steam Engine By HAROLD E£. BENSON The front cylinder head is a pipe cap, the exterior of which is turned to pre- sent a more pleasing appearance, and drilled and threaded to receive the stuff- ing box, Fig. 2. The distance between the edge of the front-end steam port and the inner side of the cap, when screwed home, should be much less than that shown, not over 4 in., for efficiency, and the same at the rear end. When the cap has been permanently screwed on the cylinder, one side is flattened, as shown, on the shaper or grinder, and the steam ports laid out and drilled. It would be a decided advantage to make these ports as much larger than given as is possible, as the efficiency with 14-in. ports is far below what it might be. ing, the small engine described in this tw T ticle was built by the writer in t at re time—about an hour a day for ast- onths—and drives the machinery as mall shop. At 40-lb. gauge pres- rms r e engine runs at 150 r.p.m., under ort id, and delivers a little over .4 the horsepower. A cast steam chest, be rger and more direct steam ports, be ce condensation losses; less clear- in the cylinder ends, and larger ing surfaces in several places, would r he efficiency of the engine up to a al higher point than this. In the case, however, the engine is de- ul ample power for the purpose to it] it is applied, and consequently la hanges were not made, but, if the my is to be used for a uous rather than be ttent service, it be foolish to waste ur costing more than the inges needed to the ve it. ing rht be remarked, a point, that no nt | of construction thie bed here is to be the best; many methods of mak- led h part will doubt- t ‘cur to the reader. e improvements that e thought of too late incorporated in the ne will be mentioned proper place. » cylinder, shown in — Il |, is made from a of steel pipe, se- | with special re- to the condition of the inner sur- This may be bored to size, and pped, or ground. A _ standard inside eter will make the fitting of a stand- \uto-engine piston ring easy. The are threaded on the lathe, standard thread size, while supported on two nical hardwood blocks, held on a ded mandrel, and drawn firmly into vlinder ends with nuts and washers. standard mandrels for this purpose, , vailable, are more convenient. The rectangular plate A, that supports the end of the cylinder, is also bored and eaded on the lathe, using a four-jaw pendent chuck to hold it. This plate, rear cylinder head, and a copper gas- ire clamped together, and the similar in each all drilled at one time. J Connected to the en a View of the Engine Complete, Ready to be Mounted on the Bed and to be Steam Line: The Total Cost of Building Was $15.40; This may be Considerably Reduced by Following Closely the Directions Given To make the stuffing box, a length of 2-in. cast-iron rod is drilled to fit the piston rod, then turned out at the front, recessed to a width of 5% in. for the packing, and threaded to fit the gland nut. The piece is then reversed in the lathe, and the outside threaded to fit the cylinder. After cutting off, the wrench flats are ground on the shoulder. The gland nut is made of brass-bar stock, threaded to fit the stuffing box, and the hexagon ground on it. When the parts are assembled, with the packing in place, the piston and rod should work smoothly, but stiffly, in stuffing box and cylinder, and be almost immovable when the ports are closed. The piston is made of cast iron, and undercut to reduce the weight, as in Fig. 951

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952 POPULAR 3. The groove is turned to suit a stand- ard %e6 by 3-in. piston ring. The piston rod, which is of steel, must be fitted to the piston with great care, to insure their being exactly square with each other. If the face of the piston is square with the edge, the inner nut on the rod faced off square in the lathe, while on the rod, and the piston and locknuts then put on and tightened, no difficulty should be experienced. The steam chest, shown in Figs. 4 to 7, is the hardest part of the engine to make. In this case, it is built up, using a square bar for the port block, an angle piece for the bottom and side, two endpieces, and a cover. The port block, Fig. 5, is made of soft steel, the ports being drilled in as indi- cated by the dotted lines, from the ends and front, so as to provide a continuous passage for the steam. The exhaust port is drilled in from the front and bottom faces. The endpieces of the steam chest are held in place by short ¥-in. capscrews, tapped into, and closing, the holes in the ends of the port block, and by long %e-in. bolts connecting the outer edges. The stuffing box on the front end- piece, Fig. 7, is made by brazing a blank nut to it, and making a snug-fitting gland for it, as shown in Fig. 8. The gland is drilled a neat fit for the valve rod, and for the 44-in. bolts that draw it into the stuffing box against the packing. : All parts of the steam chest are ground flat and smooth before assembling, and, when chest and cylinder are completed, are brazed together, all joints, the ex- haust pipe, and the supports being brazed at the same time. When brazing, the steam ports should be plugged from in- side the cylinder, to prevent any spelter from flowing into and closing them. The steam-chest cover is not brazed on, but is held by %4 by 34-in. screws, entering the port block, and by long bolts at the outer edge, passing through a heavy strip of iron below the chest. Packing is used on the steam-chest cover joint. The slide valve, Fig. 9, is cut from a block of soft steel, or cast iron, the open- ing in the face being cut as deeply as pos- sible, drilling the center hole first, and plugging it to obtain centers for the drilling of the outer holes. If the steam ports are enlarged, the dimensions of the valve must be changed; the new dimen- sions can be found by making a full-size layout of the ports and valve, or by mak- ing cardboard models of steam chest, valve, and ports, and adjusting these until the correct dimensions are obtained. MECHANICS There is room for considerable ex peri- ment on the valve; any textbook on steam engines will provide suggestions for adding lap to the valve, to cut off the steam before the end of the stroke, and since it 1s comparatively easy to make this part, it is well to fit the valve to the engine after the latter is complete. , The crosshead and guides, shown in Figs. 12 and 13, are simple in construction. If a shaper or planer is available, a better construction may be made by following any of the designs seen on large engines Oil cups on each bearing will furnish sufficient lubrication. The connecting rod, Fig. 14, is made of l-in. square stock, turned to a diam- eter of 4 in. in the center. The “big end” is drilled larger than the crankpin, and then sawed as indicated, so that the up- per piece may be removed. Bolt hole: are drilled through both pieces. When the engine is assembled, shims are place between the halves of the big end, and babbitt poured through the oil-cup hole around the crankpin, using putty da: on each side of the bearing. Small hole are drilled in the walls of the crankpin bearing seat, before babbitting, to anchor the babbitt in place. The other end the rod is fitted with a yoke and wrist pin, as indicated, the diameter of the pi: being made as large as possible, and ru in babbitt bearings. Large-engine pra tice may be followed here, if desired; fact, it will pay to study the details large units, and to follow them as closely as possible everywhere, remembering t! this description does not pretend to sho the best practice, but only how the jol may be done with material at hand. The eccentric is turned from stock, 2 in. in diameter, cutting the sheav: first, then changing centers to turn t boss. The latter should be left long enough to enable it to be held in a chuc! for drilling, after which it may be cut t length; the boss may be fitted so as bear against the outboard cranks! bearing, to prevent side motion of | crankshaft, instead of using collars. The eccentric rod and strap are m of a length of 4% by 1'%4-in. flat iro: shown in Fig. 15. The valve-rod.e: should be fitted with a wristpin and yok as on the connecting rod, instead of the construction indicated, which is 01 shown to give the dimensions. The st that fits the groove in the eccentri lapped to a smooth bearing surface clamping it round a mandrel covered w fine emery and oil, and grinding until strap fits the eccentric sheave perfect rou

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REAR HEAD ------~_

a

coe © hee o +

Fic.2

O

r— CYLINDER-HEAD STUFFING BOX AND GLAND

; te ater B]| O.4= Ree « / if \ fer oat] | LY b- § DRILL----—"- = wr hii? St x / 3 MA / Lem ———— tof | | ( < J Or eee ee wceconee< + PRS ale : ah ON3-et] ‘vie iF Lon | , 16”) J j.3” |! “ 7~ QPIPETAP:-" a_i 5" 7 eB |: port | Oo }-.+- INSIDE. END OF Fo “Oca A ; O-% “ib oo CYLINDER, FRONT HEAD -—-Li...| - — gpiretap-7 i “ - : fis. PLATE A, REAR HEAD, AND kg+— DH CYLINDER

PISTON AND ROD Fic.3

Fig.6

VALVE. GLAND 1G,

a : ree % a = SORILL~ 0) ea y-—L—— 24

sete OF ASSEMBLED CHEST BxIxeg TF : 7 O* ig0RILL“D O LOWER SUPPORT FOR CHEST-COVER BOLTS PEAR CHEST SUPPORT ” 40 Fia.4 bigs DRILLED AND TAPPED FoR $x4 SCREWS - FORM -f DRILL ff | Senet 2 ieee. ; A ios ‘ é. 1 Ba secemnge: aT Oe a, a gree Pe * | eae = ai 2 g7Qeceocee eo | E @. Ho —< © i oS oy a ® ( 5 oy. o| = eat Men SE se FE tae tae. A —e_LUf oo 1 wr + 14— 1 —4+— 13° 4 Lm “PLUGGED kk 18" —+ J 4+- 3 -4+— 8F —| ~¥— a lL g — 5 — 4} TOP VIEW SIDE VIEW END VIEW STEAM-CHEST PORT BLOCK | Pe nr me || oe —— TI rx =. 4 = = a GQ) S| 1] ine : - ~_t ta ] ‘| ——F—_—_i eis 10) = SIDE AND BOTTOM OF STEAM CHEST a" ee

FRONT END =~ — 3° ~

REAR END STEAM-CHEST ENDS Fis.7

Figures 1 to 3, Complete Details of the Cylinder, Stuffing Box and Gland, Piston and Piston Rod; Figures 4 to 7 Show the Component Parts of the Steam Chest, as Built Up, and an Assembly View of the Finished Steam Chest, without the Cover; Note Carefully the Method of Drilling the Steam Ports in the Block Shown in Figure 5, and the Position of the Various Parts in the Assembly View

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| Ley = \* "Me anes Sane een teas aad | Botte ee ore | VALVE ROD r— 1" = 2 Pee eee 2 Fic.10 | | = > . g= : | a lS ee ne { ; ie" 6 "| : — tt ‘= a wa ee 2% A came TAPPED FOR GREASE CUP’ we | YY

|} 34/ 0 " 127 See ow DRILL - _ Ci g i | le ' = | rT } | om | is 2" -| VALVE- ROD GUIDE SLIDE VALVE Fis.11 Fic.9 : 23 —-——— : ic ——sieg —-F- ial | | aa | 3 | —— DRILL-~ | , ) ie ts | | t ae giur( I... i eee =e om ie | | ‘ rt ox oie , | “ — ——___— 44 — > | ‘ = | - CROSSHEAD i> h-4 | a -— — | — | tims — +-——1+ | | — 4

ES es CROSSHEAD-GUIDE SUPPORTS, CROSSHEAD GUIDE, 2 REQUIRED —— Fig .13 Fia.12 « — sBOLTS y--—---- 5 ROUND - Ao" + ++ + --—- xk : - x ‘| ' som =I on ee + | ' ¥ be . 8 | \-1"SQUARE a a . > | ~+—_— i) — —_——_——— — > eed | a : i] V ow —t 9 > | a _ ty } — . ; O Li | CONNECTING ROD oe te

i} * Fig.14 - a -—— -5%3 IRON NN , ———————_ | | Hee a am a oY) . 7 | | oie oo } | PS |b. S at 0D ag T | —— +o + ; _— } g"+wiDTH OF” = -——_—+ PULLEY } CRANKSHAFT BEARING, CRANKSHAFT | 3 OF EACH REQUIRED | Fig.17 Fig.18 Fio.19

Figures 9 to 11, Details of the Slide Valve, Valve Rod, and Guide, Showing How Opening is Drilled | Valve; Figures 12 and 18, Crosshead, Crosshead Guides, and Crosshead-Guide Supports; Figure 14, De tail of Connecting Rod; Figures 15 and 16, Eccentric Rod and Strap, and Eccentric Sheave; Figures 1 and 18, Crankshaft Bearings and Crankshaft; Figure 19, Side View and Part Section of Flywheel 954

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POPULAR MECHANICS 955 The crankshaft may be made in two vays. It may be built up as shown in Fig. 18, the ends of the shaft and the crankpin being threaded, or shouldered and pressed into the webs, and pinned. [his method requires great care and ac- curacy, to keep the shaft ends and pin square. The shaft may also be turned from a solid bar of steel, turning the crankpin first, then moving the centers and turning the main shaft. This meth- od makes a fine crankshaft. After turn- ing the crankpin, the space between the webs must be blocked firmly with a piece of metal or hardwood, to prevent the webs from being sprung in when turning the main shaft. To set the valve, the crank is put on the forward dead center, rectly behind them, in the base, to re- ceive nuts for the screws. After the cylinder assembly has been bolted down, the crosshead guides may be bolted in place, so that the crosshead will come to within an equal distance of each support at the ends of the stroke. When constructing an engine in this manner, it is best to build the cylinder and steam chest first, and make the sub- sequent parts conform to the re gee pr of these parts. This is essential, in any event, in the case of the saa cod cael supports and valve-rod guide; these should not be drilled until the crosshead is attached to the piston rod and the valve rod to the valve, and the correct height for the holes determined. The and the eccentric set 90° ahead of it, then locked. The eccentric may be led or advanced a few de- grees after the engine has been running, if necessary. The flywheels are cast / ‘ ’ ' ‘ ,——- CROSSHEAD GUIDE 7 CROSSHE AD 2 g TAP ee Ser -2F> ef sgt 252i [-«— BASE BRACKET FOR slightly larger than the size shown, then turned down on the lathe until of the proper weight. This will depend upon the speed of the engine, the load, and other fac- tors; the flywheels on the writer’s engine “MECCENTRIC ROD ' A STEAM CHEST ---~” \ ~BRACKET “- FLYWHEEL PLAN ,7 CONNECTING ROD CYLINDER AND STEAM CHEST BOLTS Fic.20 weigh 10 Ib. each, and it a will be noticed that as ECCENTRIC’ much of the weight as possible is concentrated SIDE VIEW, ONE FLYWHEEL U AND BEARING REMOVED END VIEW ASSEMBLY VIEWS in the rim, the web being Plan, and Side and End Elevations of Horizontal Steam Engine Assembled: Fi made as thin as practi- cable. The wheels are keyed to the shaft, the keyseats being cut by holding the shaft stationary in the lathe, while running the cutting tool hori- zontally by means of the carriage feed, and feeding the tool with the cross feed. The construction of the three crank- shaft bearings, Fig. 17, is obvious; they are drilled out, while clamped together, to allow babbitting, the metal being poured through the oil-cup holes, which ire easily redrilled and tapped afterward. The engine base, shown in the assem- bly views, is made of oak, 2 by 8%4 by 25 in. in dimensions. A heavy iron base bracket, or reinforcing bar, Fig. 20, is fastened to the rear of the base with lag- screws. The holes in the front of the bracket are tapped to take the cylinder and steam-chest support screws, or they lay be drilled plain and pockets cut di- igure 20 Shows the Bracket Used to Fasten the Rear-End Cylinder and Steam-Chest Supports to the Base same thing applies to the other support- ing brackets. The center of the crank- shaft must, of course, be the same as that of the piston rod. The base is cut out to clear the crank and connecting-rod end, and the bearing-bolt heads countersunk in the underside of the base. The base may be attached to a concrete or brick- work bed, if desired, by means of bolts set in place in the bed. For lubrication of the piston, a stand- ard cylinder lubricator, costing about $5, should be purchased, as it is not advisable to attempt to make this fitting. The cost of this engine was $15.40 com- plete, most of the material being new; part of the material was wasted in ex- perimenting, and the cost of the engine could be cut in half, were the work to be done over again,

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956 Guard for the Planer The illustration shows a very good knife guard for the wood planer. It is made of %4-in. pine, cut to the shape SHEET-BRASS , BAND,FASTENED TO / EDGE ‘OF GUARD ; ' ' ‘ ' | ‘ 1 ' ' 4 ~WOOD STRIP —— —— a = An Automatic Safety Guard for the Planer, Mounted on a Door Check: The Knives are Covered at All Times shown, and is attached to a flat-iron lever fastened to the spindle of a common door check, which, in turn, is screwed to the edge of the planer table. The door check holds the guard tightly against the work guide, or against the edge of the work. The revolving knives are covered at all times. The edge of the guard is faced with a band of sheet brass to prevent wear. A drawer pull may be attached to the upper side of the guard to facilitate handling it on wide work. Protecting Edges of Concrete Steps To prevent the edges of concrete steps from being broken by the impact -of heavy barrels, boxes, etc., it has been found very practical to reinforce them in the manner illus- trated. Strips of galvanized iron, or other metal, as long as the steps, or at least as long as the part subjected to most wear, are bent and imbedded in the concrete, as indicated. The part of the strip imbedded is first perforated with l-in. holes along both EXPOSED METAL EDGE * PERFORATED, GALVANIZED- IRON STRIPS POPULAR MECHANICS sides, leaving a space, about 1 in. wide, that is exposed on the edge of the tread The concrete steps to the basement oj a warehouse that were reinforced in t! way have withstood the jars of heavy boxes for two years, and the edges do not yet show any evidence of the hard usage to which they have been subjected. Setting Milling Cutters to Depth The drawing shows a neat little device to aid the milling-machine operator in feeding cutters to accurate depths. It hard to tell just when the cutter actua touches the face of the work, although if this can be determined accurately, t! rest is merely a matter of feeding the cut ter to the depth indicated by the gradua tions on the handle. The tool is made of thin spring stee bent as shown, and with the ends doubled over. A short piece of ‘e6-in. wire is passed through holes drilled in the body, and bent over at both sides. To use the tool, a piece of heavy paper, about 1% in. wide, is wrapped tightly onc around the work, and the ends are caug! in the jaws of the tool, which are close on the paper by swinging the bent p to the position shown. The table of th: machine is then brought up, and at tl Curran ——- OPEN POSITION --- > e I same time run back and forth, until the revolving cutter cuts through the paper. The tool, of course, drops soon as this occurs, warning the operato! that the cutter is in contact with tl work. Scriber Set in Fountain Pen The mechanic frequently finds it nec essary to carry a scriber around, so tha it is available whenever needed, but to carry it in one’s pocket is rather dan gerous. To overcome this difficulty, 4 scriber point can be set securely ‘in the barrel of a fountain pen in the same pos! tion that the pen point and feeder othe: wise occupy. The cap is screwed on the barrel as usual.

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POPULAR Flux for Brazing The usual method of applying borax to metal before brazing is to apply it to the metal dry, after the metal has been thoroughly scraped or cleaned. It has been founds in a large coppersmith’s shop, that a better’ way is to coat the metal with a solution of boracic acid. The advantage of this is that the solution penetrates every crevice, and covers the surface completely, thereby protecting it from oxidation and also from impurities while brazing. The boracic-acid solution is made by adding quantities of the acid to hot water, allowing it to remain for several hours, with an occasional shak- ing, and then bottling the liquid for future use. Wall Troughs for Poultry Feed Cleanliness and economy are effected in the chicken pen by the use of wall troughs for feed, such as shown in the illustration. They keep the feed clean, and prevent the hens from getting into the feed and scratching it out. The upper detail shows a grain, dry- mash, or grit trough. It is made of wood, to the dimensions given, and is hung on the wall so that the bottom is about 2 in. above the ground. The lower detail shows a vegetable trough, made in a somewhat similar manner, with the ex- ception that the front of the trough is made of coarse wire netting. Beets, po- Ts NAILS 2) a i y 4, s \ v~ROUNDED "DRY MASH FLOOR \ oo t N y >» uu. SLAT i ip _ Ne BEETS AND |} fii// > GREEN FEED + [i 12 ' ' f i t hy il iq-- 4-16~~ ” ‘WIRE NETTING |" Wall Troughs for Poultry Feed: The Upper Detail Shows a Grain Trough and the Lower Detail a Vegetable Trough tatoes, and green feed are deposited in the trough, and the hens pick them away, through the mesh, until the very last scrap disappears. MECHANICS 957 Holding Containers on Bench The drawing illustrates an excellent method of holding small bottles and containers in place on the workbench, BENCH TOP Neat and Oemeatens Method of Holding Contchens on a Bench to Prevent Them from being Overturned Accidentally, or Damaged to prevent them from being upset, pushed off, or broken accidentally. A number of holes are bored through the bench top, near the rear edge, so that the bottles will be well out of the way. A strip of metal, bent as indi- cated, and fastened to the underside of the bench top, holds the containers in place. The holes are bored of various sizes, corresponding to the diameters of the bottles, and the metal strip is bent so that the top of each container is flush with the surface of the bench top. An Improvised Trammel Frequently the machinist or carpenter needs to describe a circle or arc beyond the range of the ordinary ; SCRIBER dividers. This y is easily done by clamping t he dividers and a scriber to a stout wooden strip, in the man- ner illus- trated. The pointed ends of both scriber and dividers are spaced a distance apart ap- proximately equal to the radius of the arc to be described, and exact adjustment can then be made by means of the screw on the dividers. This trammel serves just as well as the regular instrument DIVIDERS ---»> 7 CLAMP i j Ere waar I

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958 POPULAR MECHANICS Removing Willows from Open Drain Tamping Explosives It is usually a difficult matter to re- Metal tools of any kind should nev: move willows from the banks of a small under any circumstances, be used { stream of water, except in the dry sea- tamping explosives in bore holes, or press the charge into place, even in soit ground, as there is always the danger striking a pebble, which might produ a spark sufficient to ignite the charge For loading and tamping, only a wood en tamping stick should be used. | shallow work, an old broom handle ideal; for deep holes, when a long: st is needed, a straight sapling can be u to advantage. For tamping horizontal holes, where heavy tamping stick, such as one ma of oak or hickory, would be-difficult t manipulate, a stick made of a light wood such as pine or bamboo, is very desirab! Bamboo fishing poles, which are lig straight, and strong, make ideal tampi: sticks under these conditions. It is p itively dangerous for a powerful man ram a charge of high explosives int bore hole with a heavy tamping sti even if it is made of wood. In deep holes, a very long, cumberso: tamping stick would be necessary, s tamping block is used in holes that An Effective Method of Removing Willows from an vertical, or nearly so. This consists "he Medel Glee as hee a round piece of wood, from 3 to 6 long, and a little smaller in diameter t!] son, and, at that time, other farm duties, the hole, so that it will slide easily such as cultivating and harvesting, are it. A small rope is attached to the cent: pressing and require all of the time. of one end, by boring a hole diagona Hence the work of removing the willows from the center out through the sid is often neglected until the channel is countersinking the hole on the side, t! almost choked. threading the rope through the hole f: By employing the method shown in_ the end, knotting it, and pulling it bac! the photographs, I was able to remove so that the knot is drawn into the cout the willows easily and completely dur- tersink and does not interfere with t ing the wet season. I obtained the beam _ sliding of the block in the hole. of an old breaking plow, and after heat- The block should be made of hard ing it, gave it a quarter twist a few inches wood, to resist wear, no metal part from the back end, so that the share was should be used, and it should not be t turned at right angles to the beam. This heavy. It is operated by raising it a fi blade I sharpened, and then replaced the or two and allowing it to drop on t clumsy plow clevis on the end with a “stemming,” as the tamping material smaller one. cailed. The block, of course, is wit! With a few feet of log chain attached drawn when fresh stemming is droppe to the beam, and a team of good horses’ into the hole. The tool recently de to pull the plow, the sharpened end was _ scribed by one of our contributor hooked behind the roots, and the team which was made from a long bolt, h started. The result was that the blade been condemned by the leading expl drew still deeper under the roots and re-_ sives experts and insurance companie moved not only the roots and bushes, for the reasons stated above, and ou but, at the same time, a considerable por- readers are warned against its use. tion of the earth that had accumulated —— in the ditch. @ Are you in doubt as to the best type o I have found this method quite the radio instrument to construct or pu! speediest I ever tried—Elmer Hufferd, chase? Write to our Bureau of: Info: Rushville, Ind. mation.

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POPULAR MECHANICS Sleeping Porches for Hospital The illustration shows how an old western hospital was converted into a modern open-air sanitarium by recon- structing the windows so as to permit the beds to be pushed out onto small orches. The window openings, hich were of the ordinary size, were cut down to the level of the floor. A small porch, sup- ported by iron brackets, was built on the outside of each window. A light metal rail- ing was built around the porch and fastened to the wall, and the porch was screened in to keep out flies and other insects. Two doors were substituted for the part of the wall that was cut out below the window, may be seen in the lower photograph. With this arrangement the bed can be drawn into the room during stormy weather, and the doors and window closed. No drafts are en- countered when the doors and windows of the rooms are kept closed. Shades can very readily be attached to the porch screens to keep off the rays of the sun, if desired; how- ever, no shades are used on the build- ing shown in the photograph, although it is located in a country where the sun shines with little interruption for long periods—Edward H. Flaharty, Denver, Colorado. t Above: of One of Reseating Globe Valves After the seat of a globe valve had been ground several times, it became neces- sary to renew it. Instead of employing the usual method of tapping out and using a threaded seat, I made a plain tapered seat and forced it in place. The job was accomplished quickly because no tapping was necessary. Hard metal was used for both seat and valve—Robert D. W. Berry, Philadelphia, Pa, Exterior of an Old Hospital That was Converted into a Modern O Sanitarium. Below: Sleeping Porches Handling Cable Ends Anyone who has used a wire cable for hoisting purposes, or elevator work, knows the difficulty of passing the end through a hole or eye only slightly larger than the cable itself; the end will twist and turn or flare out regardless of how well it has been wired, and perhaps the tie wire must be driven back to permit the cable to pass through. To overcome this difficulty, wire the cable as usual on the end, and also 6 in. from the end. Heat the end of the cable with an acetylene torch, or dip it first in mol- ten lead for a few minutes, to draw the temper, and then in soldering flux, and solder When cool, file off the sur- plus solder, and with a pair of heavy pliers twist the cable tightly. It will be found that it will remain twisted and can be bent any way desired. By heating the cable the hemp core is burned out making the cable smalle: When using this method, al- ways cut the cable long enough to allow the end to be cut off after the cable clamps are in place. n-Air nterior Improvised Making Tight Hose Connections To make a tight rubber-hose connec- tion to an air or acetylene tank, or to connect two pieces of rubber hose on a short nipple, heat the tapered end of a punch and insert this into the end of the hose for a few moments, just long enough to melt the surface of the rubber slightly Then slip the hose over the nipple as quickly as possible. It will be found that the hose will slip over the nipple very easily, providing, of course, that the nip- ple is not too large. After the rubber will be on so tight that it cannot be removed except by cutting. No wires or clamps are necessary on a con- nection made in this way —W. E. Rausch, Milan, Mich. has cooled, it

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POPULAR A “Sun Porch” for the Beehive beehive con- It is made front, and fits The newest “wrinkle” in struction is the “sun porch.” of wood, with a glass A Detachable Glass “Sun Porch” for the Beehive That Prevents Much of the Usual Bee Mortality during Winter and Early Spring snugly into the opening of the hive case, as indicated in the photograph. It is claimed that the attachment adds to the warmth of the hive, and prevents much of the bee mortality that is usual during winter and early spring. The porch provides a protected and well-lighted air space, about 5 in. wide, between the inner and outer entrances, into which snow and rain cannot pene- trate, and enables the bees to bring out the dead ones all through the winter, so that the floorboards are kept sweet and clean. The framework of the sun porch is made just large enough to fit in the outer entrance of the hive case, and to butt against the block of the inner en- trance. The glass front, which is cut to fit the framework, projects about 2 in. over the alighting board. A small piece of tin is nailed on the bottom of each of the sloping ends of the frame, and is bent up in front to form a holder for the glass. When the glass is in position, the bottom edge is about % in. above the alighting board, so that the bees have a clear entrance all along. A % by 34-in. slot is cut in the center of the framework, at the top of the glass, to allow any bees that may run up the glass to fly out. The sun porch makes it possible for the bees to be left with little or no atten- tion throughout the winter, as there is little danger of suffocation through the blocking of entrances by snow or ice. In the early spring, the space inside the glass is heated by the sun, and the bees revel in this and become warm before fly- MECHANICS ing out. The porch also acts as a pro tection against robbing. It is easily r moved or placed in position —R. Frank lin Mundorff, Kansas City, Mo. Window Display for Coal Dealer A retail coal dealer has arranged display that is considerably more attrac tive than the usual assortment of lump placed on exhibition in the office windo\ Wooden boxes, about 3 in. wide and deep, were made in the form of lette: spelling the word “coal.” These doxe were painted white for the sake of co: trast, filled with small lumps of coal, an placed in the window. Oil Distributor for Milling Machines The illustration shows an oil distribut that will supply a large surface, and tl is especially valuable on form-milling cut ters, to wash chips away. It is made a piece of fine wire, twisted into a d PUNCH PITCH SPIRAL SURFACE SUPPLIED WITH OIL fins, Novel Oil Distributor for Milling Machines: The O Running down the Spiral Causes It to Revolve and the Final Twist Throws the Oil Off creasing-pitch spiral, and mounted on forked support, as shown. The weight 0! the oil running down the spiral cause the latter to revolve, at a speed depend ent upon the amount of oil supplied When the oil reaches the sharp twis' where the pitch of the spiral is smallest centrifugal force causes the oil to f! off. The area covered by the spray o oil depends upon the distance of th spiral above the work, the size and shap: of the spiral, and the amount of oil sup plied. The ends of the spiral are pointed to reduce friction and are set in punc! marks made in the ends of the fork: support.

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POPULAR Green-Gold Plating Solutiou -reen-gold plating solution for rs’ use can be made by using reg- ellow-gold solution, and adding to ile plating, ordinary silverplating n, watching the article closely until lesired color is obtained. Use a cold anode, and attach to the same lead anode, the same size as the ne. After plating, the high lights suught out by rubbing with a wet dipped in bicarbonate of soda. Homemade Gas Torch etime ago I saw a homemade gas used for heating a collar on a large The torch was made of pipe and , and was so arranged that either or a hot blue flame could be ed by the use of a sliding-valve ngement to regulate the air supply. nozzle is made from a piece of ar OW »-in. pipe, 18 in. long, slotted as shown, ided at one end, and provided with A hole, drilled in the exact center the cap, is threaded to receive the jet. MECHANICS Improving the “Steamboat” The drawing shows an improvement on the “steamboat” used for tracing designs and drawings. The improvement con- WINGNUT “GROUND GLASS ~-,REFLECTOR ’ \-VENTS---- he 4) 'S,4"LONGS wipe & ian —— iS" NOZZLE SLEEVE ----~ HANDLE. ---- “NOZZLE A avd0U Simple sood sliding fit on the nozzle. idle can be made from a length of but Efficient Homemade Gas Torch with Which Either a Yellow or a Hot Blue Flame can be Obtained ; consists of a piece of 1%4-in. pipe, 15 long, having one end threaded for it 3 in., and screwed into the cap, shown, so that the end of the jet es about 4 in. from the end of the zle. A sleeve, made from a 4-in. length of pipe, is slipped over the nozzle over the slots; the sleeve should be The tap iron, riveted or screwed to the cap hown. The amount of gas fed to the h is controlled by a valve in the line, | the air supply by means of the sleeve the air slots—L. B. Robbins, Har- h, Mass. A “Steamboat” can be Greatly Improved by Provid- . It with Two Wooden Clamps on pposite ides to Hold the Work on the Glass Securely sists in fitting two wooden clamps on opposite sides of the box to hold the work securely on the glass, and to prevent it from being moved accidentally while tracing. The clamps are maple strips, held in place with bolts provided with wingnuts, as indicated. A flat steel spring is fitted under each clamp, to raise it when the wingnut is loosened in order to make it easy to insert the work. Removing Tight Bolts or Screws A convenient and effective method of removing tight bolts or screws is to place an ordinary detachable socket from a wrench set over the nut, so that two wrenches can be applied at the same time, as shown; the larger wrench onthe side end of the socket keeps the socket from splitting open under the force applied to it with the smaller wrench. In almost every case this method will be found to loosen the bolt, without springing a good wrench, which is often done on jobs of this kind. ‘SCREW SOCKET WRENCH --SMALL OPEN - END WRENCH

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POPULAR MECHANICS Serviceable Homemade Hoist be slid endwise, to put the gears out o; mesh, when moving the hoist. The portable hoist shown in tfe illus- A heavy piece of wood, 2% ft. long tration has been found of great utility by and fastened to one of the legs by ; a contractor whose work involves the bolt, so as to permit its being pressed against the rim of the wheel, is used a: a brake when lowering the load, and , long iron bar, sliding in a flat-iron bracke: bolted to one of the legs, can be used + hold the load at any desired height, }, thrusting it between the wheel spokes. © A heavy block and tackle is slung fro; the center leg by a clevis, the end of ¢! cable being attached to the drum. Ty long bolts, fastened through the trianew- lar-frame legs, about 3 ft. from the | tom, provide handholds for moving frame about, and spikes are driven the lower ends of each leg to prevent slipping. A large hook, fastened to the upper end of the center leg, allows the hoist to attached to the rear end of a truck car.—J. C. Coyle, Colorado Springs, Co! Guide and Die for Punching When punching holes in sheet it is sometimes difficult to locate th exactly under the punch, especially the holes to be punched are at some distance from the edge. To fa- ctlitate punch - Above: The Homemade Hoist Set Up Ready for eer 8 - fie 2 h Use. Below: Details of the Hoist Mechanism holes, I made the tool placing of concrete burial vaults weigh- shown in the ing about 1,800 pounds. illustra- The legs of the hoist are 12-ft. lengths tion. It con- of 4 by 4-in. stock, two of the legs being sists of the braced in the form of a triangle by a two opposite 3 crosspiece and uprights of the same outer leaves _AUTO SPRING - stock. The other leg swings, on a l-in. of an elliptic ~. bolt, between the first two, at the apex rear spring. These I heated, straighte of the triangle. This leg is swung out out, and cut to a convenient length, when the hoist is to be used, and folded then fitted the sockets so that, in against the other two when the hoist hinged together, there was no sidepla: is to be hauled away. drilled holes of various sizes through ! A 6-in. wooden “drum is fastened to an pieces, after hinging, and then rete axle that runs in bearings bolted to the pered the pieces. The tool thus mad vertical 4 by 4-in. pieces, and a 10-in. placed over the sheet, so that a hot gear is keyed on one end of the axle. the proper size is over the place v This gear meshes with a 6-in. gear, keyed the hole is to be punched. It is th n on a shaft that runs in bearings mounted easy matter to punch the sheet; the on the other side of the uprights, and tom piece serves the purpose ot. two buggy wheels are fastened to the and is always in the exact positior outer ends of the shaft. By loosening the receive the punch as it is driven thro: collars shown in the detail, the shaft can —G. G. McVicker, North Bend, Neb S| |O"GEAR

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10) HINT

Information as to where to obtain any specified materials or parts for making objects described in the following pages may be from our Bureau of Information.—Editor. had. on request, An Improved Lawn Canopy By C. W. MORGAN ‘ee lawn canopy shown in the illus- tration is rather unusual in design, and is very easy to construct. It may be used to shade the outdoor dining table or furniture, and a hammock may be ung between its supports. The con- struction eliminates the faults of the com- types, such as the sagging of the canvas and slacking of the ropes that are ed by changes in the weather. The end supports are the ends must be plugged for the screws or pins that fasten the 1 by 3-in. cross- pieces to them. Brass grommets are fastened in the canvas, at the points indicated, and tie ropes pass through them. The center grommets may be slipped over pegs in the ridgepole, or ropes passed through them and round the pole. The end tie ropes are fastened around the sidepieces

le of 2 by 4-in. stuff, vo sides of the tri- ular frame being 8 ft. long, and braced, r the bottom, by a e of 1 by 3-in. stock, 6 in. long. Bolts are ed to fasten the frame ether, and a space for ridgepole is left be- een the upper ends of sidepieces. e ridgepole is a 12- length of 2 by 4-in. ck, notched at each to fit over the upper es of the top cross- es on the end frames, drilled, at the ends, for the bolts that fasten the é | braces to it, and

- - GROMMETS —. Be. \ RIDGEPOLE “<—— POLE IN HEM . OF CANVAS -

al

end bolted to the sidepieces of the frame. The end brace is 8 ft. long, also of 2 by 4- lumber; it is bolted to the ridgepole the top, and to 2 stake, driven into e ground, at the bottom. This, in the riter’s opinion, is the best way to fasten e braces, although, of course, they can lastened to the frames by struts, thus inating the stakes. (he canvas, which is 11 ft. long by ut 11 ft. wide, is kept taut by a frame le of 1 by 3-in. stock and 2-in. poles pipes. The frame is 11 ft. by 9 ft. 6 in dimensions, and the poles are fitted hems, 4 in. wide, sewed in the canvas shown in the detail. If pipes are used, An Improved Type of Lawn Canopy, of Substantial Construction: The Canvas is Always Kept Taut, and, as the Top can be Tilted to Either Side, It Provides Plenty of Shade at Any Part of the Day of the canvas frame, and then led down to the legs of the main frame and tied within easy reach of the hand. With this design, the canopy is always taut, and may be tilted to either side, as indicated by the dotted lines, thus making it serviceable for use any part of the day. If bolts are used to fasten the frame together, the whole canopy can be dis mantled and folded up into a compara tively small space. The ridgepole and braces fold up together, and the end frames may be collapsed also, by remov- ing only two bolts.

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964 POPULAR Two Kinks for the Fisherman The drawing shows a fish lure that sel- dom fails in its purpose, previding, of course, that there are fish in the vicinity. SUSPENDER 7a SwinE-w MESH LIPS ~ “TOR | CLIPS, ; | SOLDERED ~.. , | TO SCREEN 4 LCOTTON | S& ? oe SCOTTON ; 3 TAPS : Aa LINE / . | } \ / pe a ae / (4 DETAIL OF FISH LURE | ve RN Above: a Seemmecen aan Bowl, Containing Min- nows, That Forms an Excellent Fish Lure elow: The Fish Stringer Provided with Detachable Ring The*lure consists of a transparent glass bowl, preferably a goldfish bowl, about 6 or 8 in. in diameter, containing some minnows. It is suspended in the water a foot or two away from the point where the user is fishing. To make the lure, cut a circular piece of galvanized, or copper, screen wire, about %e-in. mesh, to fit over the opening of the bowl. Solder four brass clips, shaped to fit under the edges of the bowl, to the screen, as shown. These keep the screen firmly in place while the bowl is immersed. Wind two layers of friction tape around the neck of the bowl, coat well with a good varnish, and allow it to dry. Then take a line of ¥%-in. cotton, of sufficient length to go around the neck, and allow two suspension leads about 6 in. long; form loops on the ends of the leads, and fasten the loops with common suspender clips. Then fasten the cord around the neck, apply another coat of varnish over the cord, allow it to dry, and the lure is ready for use. Fill the bowl with water, and place in it some live min- nows, put on the cover, and lower into the water. I have found from experience that it is best to use from six to twelve minnows. MECHANICS I have employed this lure for catching herring and perch, with a minnow on my hook about 3 ft. away from the lure When the water is clear, the fish can plainly be seen to dart at the minnows in the bowl, but, upon coming in contact with the glass, they seem to realize that something is wrong, and immediately turn and snap at the minnow on the hook When removing fish from a stringer, jt is usually necessary to force them back over the stringing needle, and this is not a very easy or pleasant task. To over- come this difficulty, I use a detachable ring on the lower end of the stringe: shown in the illustration. The ring made of No. 8 galvanized wire and has the ends hooked to engage with eac| other, as indicated. By squeezing t! ring, it is loosened and can be removed from the stringer. With one jerk of the stringer, the entire catch will slip off The stringing needle is made of tl! same size of wire as the ring. The string er is made of braided cotton line of the desired length, the ends being looped a: fastened with suspender clips—Frank L Howe, Milwaukee, Wis. Simple Filter and Water Cooler The drawing shows a simple filter water cooler that can be made fro1 tile pipe, filled with gravel, charcoal, FILTERED WATER —a ecceras | ~—*, ‘ OVERFLOW 12” TILE. PIPE 2°LONG --->4 e-------- SAND r S> . Daa ciate eC em ——* wt --- CHARCOAL RETURN BENDS , _- GRAVEL CEMENT BASE ~._ \__. DRAIN COCK et (GUTTER —s——} ‘i s > ae rrr \ pe A VS. -~ ~ I” ig } } ‘ a CSTE. Ne rs 4 \.--- === VALVE, S----- WATER MAIN 7 An Efficient Water Filter and Cooler Made from Two-Foot Length of Tile Pipe, Filled with Gravel, Charcoal, and Sand sand; the water enters the filter fro: below, flows over the top of the p and is caught and led off by a gutter the cement base. The tile pipe is 12 in. in diameter about 2 ft. long, and is set in a cem base, formed-as shown. The water n enters from below, through the base, the end of the main projecting cemet

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POPULAR MECHANICS ng the tile pipe being fitted with a return ny bend, to prevent the gravel from choking re the pipe. The water is regulated so as an to rise Slowly through the filter and over- WS flow down the wall of the pipe, the par- ict tial evaporation of the water keeping the at wall cool, and consequently the water in- rn side. A drain cock should be provided, as indicated, so that the filter can be it lrained when it is to be cleaned, and new ck cravel, ete., substituted for the old. ot ile Retainer for Gasoline-Tank Cap he loss of gasoline-tank caps is a uent occurrence, which, however, can be prevented by means of the sim- ple attach- ment illus- trated. One end of a length of wire is soldered to

LINE- Lea TANK CAP SOLDERED

a the cap; the ay” other end is L. bent into a loop, and a right-angle bend is made : in the center the wire. The loop at the end of the must be a little larger than the ening in the gasoline tank, and is - rung a trifle in order to.force it through 7 ‘ opening. Neat Method of Piling Stones . on Cleared Land \ neat way for a farmer living in a . ky region to pile the stones gathered CK m his fields is to dispose of them in R oven-wire containers located in the cor- ners of the fields. he containers are made from 12-ft. ngths of weven-wire fencing, rolled into form of cylinders, the two meeting elges of each being stapled to a corner ist. In filling the containers, the heavy the nes are, of course, thrown in_ first. the pile grows higher, it is built as enly as possible to prevent it from sag- ng to one side. It may be necessary to ve a long stake on the side of the con- ier opposite the corner post, and ple the mesh to the stake also. It is irable that the mesh of the fencing be iller at the top of the cylinder, so that smaller stones will not fall through. (he piles of stone so arranged have a neat and roughly ornamental appearance, | add materially to the strength of the

965 fence, by bracing the corner posts. When the containers have been filled, a cement

sive gee” E aigt So ir nha a Has, <4be é i 7] m4 Wie ee iM sina a causst ese lol Neat Method of Piling Stones Picked Up from Cleared Land: The Rane Piles Also Add to the Strength of the Fence

composed of 1 part portland cement to 1 of sand can be poured over the pile, and tamped into all the crevices, making a solid, almost everlasting corner post, which wiil take the place of the wooden one when the latter is no longer service- able. A solid foundation can be provided by digging under the pile, one side at a time, allowing some of the stones to drop into the excavation, and filling in with cement, or the hole can be dug be- fore the stones are piled in the corner, the larger stones placed in the hole, and the cement poured in before building higher.— Ward L. Schrantz, Carthage, Missouri. Preventing Poultry from Roosting on Nests Finding that chickens had a preference for roosting upon the nests, rather than upon the roosts provided for them, , NOTCHES the writer hit upon the simple idea illustrated to prevent this, and found that it worked effectively from the start. All that is neces- sary is to saw notches in the edges of the nest boxes indicated. The notches

, as are cut about 2 in. deep, and need not be of uniform size, although ward L. this makes a neater job.—Ed- Clark, Scranton, Pa.

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966 POPULAR Novel Sliding Doors for the Buffet The novelty of the sliding-door ar- rangement for a buffet or cabinet, shown in the drawing, lies in the fact that both Po | x i Lyi BACK VIEW it t PULLEYS” ‘- CHAIN A Novel Arrangement of Buffet or Cabinet Doors: Both Doors Slide Open at the Same Time, and All the Interior Space can be Utilized doors open at the same time, although only one of them need actually be pushed. Four small grooved pulleys and two lengths of light chain are used; sash cord or rope may also be used, but chain is preferable, as it will not stretch. The method of arranging the pulleys and chains is clearly shown in the upper de- tail. An additional feature of merit is the provision of end doors and shelves, so that all the space in the cabinet can be utilized—C. F. Wilhelm, Kitchener, Canada. Transplanted Onions Grow to Double Size Last year I planted a large patch of onions in my garden, and as soon as they were large enough for table use, I pulled about half of them out to allow room for the others to develop into bulbs. After the tops were trimmed and the fiber roots cut back, to prepare them for mar- ket, I found more garden space available and decided to replant them. The soil of the two onion beds was practically the same, and there was no difference in the method of cultivating, but nevertheless the replanted onions de- veloped bulbs that were double the size of the others. This was quite a mystery to me, until an elderly market gardener explained that I had accidentally discovered one of the secrets of successful onion culture. Ac- cording to him, the removal and trim- MECHANICS ming of the onions when they were lit- tle larger than a lead pencil, caused the fiber roots to branch forth with thoy- sands of minute roots, and limited the development to the bulb, which conse- quently grew to abnormal size—G, E. Hendrickson, Argyle, Wis. Improving Percolator Faucet The illustration shows hew a faucet for use on coffee percolators, etc., can be improved to prevent the drip that occurs a few seconds after the fau- cet is shut off. Two *p- in. holes are drilled in the plug, and a 1Z-in. slot is filed in the body of the faucet, as in- at, dicated. The dy) holes, in con- —sgerion a-a-*0 nection with ‘er the slot, pro- vide an air vent that opens the instant the faucet is shut off, and prevents the retention of any liquid in the nose oj the faucet—G. B. Olson, Bridgeport, Connecticut. FAUCET Spool Holder for the Sewing Room A piece of 34-in. wood, cut to the shape shown, hinged to the window casing that it can be swung out, and provided on the upper edge with number pins or dow- els, makes excellent spool hold I for the s¢ ing roo! The _ hold can be 1 as long as de- sired, smoothed down, stained and varnished to match the window « ing. Holes, slightly smaller than t! pins to be used, are drilled in the of the holder, to an even depth, about 1% in. apart. Large nails, about 414 in. long, clipped to even lengths, a! with the upper ends rounded, make go pins —E. W. Hall, Catskill, N. Y.

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POPULAR Bag Used as Dust Container cobbler who had installed an electric hing machine found himself con- ted with the problem of disposing of dust. It was impossible to discharge dust outside of the building, on ac- t of the adjoining buildings. The -ulty was overcome by simply taking iin bag and fastening it over the ex- t pipe, in the same way as the dust container is fastened to a vacuum cleaner. All the dust was retained in the which was easily emptied. Spraying Attachment for Garden Hose he chief objection to the use of an nary garden-hose nozzle for spraying hrubbery or plants is that the flow of ter must be reduced to a fine spray re any considerable area can be cov- d. To eliminate this objection, an at- hment was made for the hose nozzle shown in the drawing. A disk was from a tin can, and radial slits cut in as indicated; after bending the sec- ns, to form a “fan,” the disk was unted on a piece of heavy wire, bent attached to the hose nozzle. Two

Goes eena oe Boe CORKS

ra 4 / Hi [V Hf es = aM i ey — Attachment for the Garden-Hose Nozzle That Enables the Spray to Cover a Wide Area and Prevents Injury to Plants and Flowers A rks were drilled and fitted on the wire, ne on each side of the disk, to hold it a vertical position. With this attach- ent, it is possible to use the full stream water without damaging the plants.

[ECHANICS 967 Recess in Fence for Car The illustration shows an arrangement used by a resident of Washington, D. C.,

= rg CHAIN », .F7= + PADLOCK . ‘REAR FENCE ; < s ‘ TH MT | | | | | Eee |

|

~ , + zr x arene —.

al yo 2 io ae at a “4 J as! , r te pS od wa ye d 4 — SS Bins it - po ‘ lg fay HT 7 . 4 H — + | yi! ty owe, ah’, hi ¢ Vin mull ae Pay dH, | 23:7 oy Oh ay dee)! TY + 4 Ww | ‘ een if “VINES A Recess, Built in the Backyard Fence, and Equipped with a Chain and Lock, has been Found Con- venient for Storing a Car Temporarily for the temporary storage of an automo- bile until a garage could be built. A 7-ft. section of the backyard fence is removed and a recess, 14 ft. long, built in; it may be built of the same material as the fence, which is, perhaps, most advisable because the section of the fence cut out can then be used; or it may be built of lattice- work, as shown in the foreground, and vines planted around it, which would be the more decorative method. A _ strong chain is fastened securely around a cor- ner post on one side of the entrance, and equipped with a heavy padlock, that can be snapped on an eyebolt fastened to the opposite corner post. If the recess is used during winter, it should be pro- vided with a light roof to keep off the snow.—G. A. Luers, Washington, D. C Improvised Sash Weights While repairing an old country build- ing, sash weights improvised from old bottles filled with sand, were found to be entirely satisfactory. Although these weights were used only on one sash, they can be used equally well on both, but a lath, or other strip of wood, should be fastened vertically between the two ad- jacent bottles to prevent them from hit- ting each other and breaking. —P. F. Noyes, Wulfert, Fla.

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968 POPULAR Trousers Made to Fit in High Boots A camper who found it rather uncom- fortable to have the bulgy bottoms of his trousers “stuffed” into his high boots, Alterations That Enable the Camper to Wrap the Trousers Snugly around the Leg, Eliminating the Discomforts Experienced While Wearing High Boots soon remedied the trouble by cutting off the bottom hem of the trousers, a prac- tice called “stagging” by woodsmen, then ripping open the inner seam of each leg nearly up to the knee, and resewing the seams down to the calf, fitting the cloth loosely to the leg. Small snaps were used to hold the part of the trousers below the calf snugly around the leg. For additional security, a small tape was sewed on at the bottom, so that it could be tied around the leg just above the ankle. The alteration thus effected elim- inated all the difficulty previously experi- enced when pulling the high boots and socks on or off, and was much more com- fortable than the previous method.—Le- roy W. Hutchins, Bronxville, N. Y. Shock-Absorbing Radius Rods The radius rods on a light car often cause considerable trouble, owing to the rapid wearing of the ball-and-socket joint Flat-Spring Radius Rods Substituted for the Usual Rods on a Light Car: They are Bolted to the Frame Instead of the Crankcase under the crankcase. To prevent this trouble, a California man substituted for MECHANICS the regular rods, spring radius rods of the design shown in the photograph They are made of flat spring steel, 34 in thick and 1% in. wide. One end of each is bent to a semicircle of about 3%-in radius, and bolted to the frame, as in- dicated, and the other end to the under side of the front axle at the point where the ordinary radius rod is fastened. The curve in the spring allows vertical m: tion of the axle and also a slight “cus| ion” to the thrust of the rear wheels, thu materially lessening the shocks on the body and engine —E. B. Winter, Alha: bra, Calif. Towing a Canoe When towing a canoe behind a motor- boat, great difficulty is usually experi enced in keeping the light craft from yawing from side.to side and upsetti: unless some expert is in the canoe to keep it in the track of the leader. However, this is a “tick- lish’’ posi- tion for one to be in, as it means con- stant vigi- lance and consider- able muscular effort to avoid a bath. The diffi- culty can easily be eliminated by attaching the to rope to the bow of the canoe in the mai ner shown in the illustration; the canoe can then be towed unoccupied, and be found right side up and dry at the end of the trip. Tie the tow rope in a bo line, or any other secure knot, around t! bow of the canoe as tightly as possibl pulling the knot under the middle of t! canoe so that the rope will tend to pull the bow upward. Force one of the pad dles under the forward seat or thwart then over the loop of rope, and force under the little triangular piece set the bow of the canoe. This keeps th towline from slipping off the front of t! canoe, and any speed can be made, wi! the assurance that the canoe will foll: without any trouble—R. Melrose, 5t John, N. B. @ To remove dust and lint from dark-co ored clothing, rub lightly with a piece 0! damp chamois skin.

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POPULAR Fly Trap for Dairy Barns lilking fly-tormented cows in “fly time” always been one of the farmer’s spe- | trials, One farmer, however, by an in- ous application of the wire- MECHANICS 969 In use, the trap is placed over the top of the milk barrel, so that a part of the bot- tom opening of each cone extends beyond the edge of the barrel. Flies, in trying to get into the barrel, enter these cones, go ne fly trap to his special needs, been able to keep his cow le almost free of flies. Not has this made milking easy, the milk flow has been no- bly greater. \ barrel of separated milk, hich is used for feed, stands st outside the barn door on this This barrel is, of course, a creat attraction for the flies, and they swarm around it in large This milk is used as a iit, the fly trap illustrated being placed over the container. The trap con- ts of a wooden framework, about 2 ft. juare, which is covered with wire-screen th on all but the bottom side. In the pen side four screen-wire cones are fas- ned to suitable strips; the small open ends of the cones extend inside the trap to within a few inches of the top, and the ces between the large ends and the p sides are filled in with pieces of ood, to prevent the flies from escaping. Side and mbers. Self-Acting Door Latch \ door latch for barns and granaries ould be certain in action, so that the door cannot open accidentally after be- ng shut. A spring door latch frequently gets out of order, and is therefore not very satisfactory, but a simple wooden elf-acting latch of the kind shown in the illustra- tion has been found en- tirely suitable for the pur- pose. The latch consists of a single piece ofwood, tapering from 4 in. to about 2 in. in width, so that one end ill be much heavier than the other. It bolted to the door loosely and slightly center, so that the heavy end always tends to swing down. A curved slot ut in the door, and a wooden pin, fas- ened in the latch, passes through the slot / BOLT F aay oe 3 St.0T --- iw, OUTSIDE is Bottom Views of Effective Fly Trap, Showing How Cones are Placed and How the Bottom is Arranged up through them, and out at the top in- side the trap, from which there is no es- cape. The top cover of the trap is hinged so that the dead insects can be removed as required. Boiling water can be used to kill the flies before the trap is opened. With such a trap unbelievably large num- bers of flies are caught; as much as 5 lb. of dead flies have been removed at time from it.— Florence L. Clark, Gregor, la. one Mc- so that the door can be opened from the outside. When the door is closed and the latch released, it swings to the closed position, owing to the greater weight of the wide end—H. F. stead, Columbus, Mo. is Grin- Edging Lawns with a Blowtorch Where the surface of a walk is on the same level as the lawn, it is a common practice to trim the overhanging grass by means of a spade or other sharp imple- ment, leaving a small V-shaped trench. This may be practicable on some lawns, but if there is much of a slope to the walk, the rains often wash away the soil thus exposed, and make refilling neces- sary at intervals. Under such conditions it better to refrain from further trimming, and allow the grass to grow. As soon as the roots have gained a firm foothold, to prevent erosion of the soil, further growth can be checked for the remainder of the grow- ing season by running the flame of a gasoline blowtorch along a narrow strip. It takes only a few minutes to scorch several rods of grass along the margin of the walk. is

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CONDUCTING AN EMPLOYMENT AND INFORMATION BUREAU By EW Hitcncockt Awarded Second Prize—$50.00—in Contest on Occupations for Shut-Ins WOMAN in a small country town general principles will apply anywher in the East, who is confined to her and the equipment used in this case bed by paralysis, conducts a very success- serve equally well in other cases. ful employment and information bureau. The hanging table shown at the t The methods applied by this woman _ of the illustration was the first piece should bring to others, similarly situated, equipment made. The table itself is n not only the same measure of success, of light lumber, and is 18 by 30 i: but also freedom from the mental depres- dimensions. Two large screweyes sion that not infrequently accompanies driven into one of the 18-in. edges, bodily infirmity. these slide on a wooden arm, shaj Jeginning with two or three girls, for as shown, and hinged to the head of t whom she undertook to find employment, bed at a convenient height. A piec« her business has grown until her clientele spring wire, bent and fitted to the end covers the whole town and a large part the arm, as shown in the detail, kee; of the surrounding country. She com- the table from sliding off the arm a piled a list of prospective employers in dentally, while permitting it to be remoy many different lines of business, and a whenever necessary. At the bottom of t corresponding list of prospective em-_ table, a 6 by 6-in. block is hinged; ployes, and solicited patronage by means supports the table level on the bed, whe: of personally written cards, and outlines’ in use, and is folded back flat against of the qualifications of the applicants on table when the latter is dropped. A port her waiting list. She maintains a list of able typewriter, while not part of t boarding houses and homes, to which she original equipment, could be fastened can send her clients, with the assurance’ the table as shown in the lower rig! that they will be suitably placed, and con- hand view, and would prove of gr veniently located, and where they, can ob- value as the business grew, as not o1 tain rooms or board at reasonable rates. would it save a lot of time, but would g Her ready sympathy, capability, and a much more businesslike appearance thorough understanding of the needs of the outgoing letters and cards. For shu employers and capability of employes, ins who have lost the use of one arm made both her firm friends, and, through stout cord could be attached to the low: these qualities, her business has increased end of the table and to the bed within ea until the financial return is sufficient to reach of the patient’s mouth. By grippii keep her in comfort. the cord in the teeth, the table could | The information bureau grew out of raised to the bed, with a littie assistan the employment business. By means of a from the remaining hand; this app! large collection of books, magazines, also to the telephone. trade journals, catalogs, and government Another piece of equipment that i bulletins, she has a wide variety of infor- dispensable, is the hanging filing cabin: mation at hand, and, with the assistance This isa light, but strong box, 18 in. wid of the nurse who attends her, provides a 24 in. long, and 6 in. deep. It is divid service that is immensely appreciated by into as many compartments as neces those in the community. one large enough to contain letterhe The conditions in most small towns are and envelopes; another for fountain p« very similar, and, while some revision’ blotter, erasers, pencils, writing at and adaptation of her methods and ideas scratch pads, etc.; the remainder of t may be found necessary to suit the par- space may be divided to suit the car ticular needs of other communities, the on which are listed the names and 970

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_-- WOOD ARM BEDPOST, a SCREWEYES Ps / ‘ ' a = | Saeeen ‘SPRING WIRE 18"X 30 TABLE --+--> 6’ BLOCK -., TABLE) — 4 ‘SMALL BUTT HINGES 7 DETAIL OF TABLE ‘ : bee- WALL ap eg --t dey a= aot 2--- SPRING “ —6— be i= SCREWEYES CABINET, SHOWING INSIDE COMPARTMENTS _, FLAT IRON, _ 6 { 1 Za DETAIL OF BRACKETS imple and Easily Constructed Equipment for the Information and Employment Bureau Managed by the Shv The Hanging Table, nant to the Head of the Bed, Provides a Splendid Writing or Typewriter Desk. e Hanging Cabinet Contains All Supplies for Correspondence, Together with the Index Cards Necessary for a Successful Business 971

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Ji2 POPULAR dresses of employers and employes, and references to data for the information bureau. The cabinet is hinged to the wall by means of two brackets, made of % by about 144-in. flat iron, 61% in. long; these are shaped as shown, and have strong butt hinges riveted or screwed to the outer ends, the hinges being also screwed to one of the 18-in. sides of the cabinet. A short, strong spring, which may be a screen-door spring, cut down, is attached to the cabinet and wall, as shown in the drawing; this spring aids in lifting the cabinet from the bed, and also assists in lowering, by checking the cabinet as it is dropped onto the bed. A leg is hinged to the lower edge of the other 18-in. side, to support the cabinet when lowered. A pulley is fastened to the wall, above the cabinet, and a rope run through this, to a screweye driven into the cabinet as shown. This makes it possible to raise or lower the cabinet easily; another, but shorter rope, attached to the same screw- eye, is used to pull the upper part of the cabinet forward when it is desired to lower it, the patient keeping the other rope in the hand, and using it to lower the cabinet gently, when it has been pulled out of the perpendicular by the shorter rope. The hinged lid of the cabinet is provided with a lock, and may be used as a writing desk. The telephone is attached to the head of the bed, on an extension bracket, with- in easy reach of the hand. While this article is intended mainly to deal with the equipment necessary for a business of this kind, there are certain suggestions that may prove of help to those contemplating entering this field. Before starting on this work, the condi- tions in the town or territory in which the shut-in lives should be studied care- fully. Lists of the households employing domestic help should be compiled; tact- fully written letters to the persons employ- ing such help will usually bring a response detailing such things as wages paid, hours of work, etc. This information should be card-indexed, and arrangements may be made whereby such employers will give notice of any prospective vacancy in their households. Advertisements must be in- serted in the local newspapers, to get in touch with the help, and, once located, the agent should keep in touch, as closely as possible, with the applicant. These things are only suggestive, and domestic help is only used as an illustration; the method of attacking the problem will vary, but the same principle will apply. MECHANICS If there are any factories in the neig borhood, these will usually have their o employment agents, but they should approached, and an idea gained of kind of help required, the hours, wag: etc.; it will probably be hard to break into this field, but if one or two good employes carefully selected, can be supplied t certain factory, respectful considerat of the service rendered may be confident- ly expected in the future. Temporary help, homeworker’s serv- ices, nursing service, and other worl the same nature, should all be inve gated thoroughly, a list of reliable wor ers compiled, and homes solicited on t! behalf. As the agent gains experien more avenues of service will open up, wu til the business is finally a success. On the information-bureau side, it be necessary to build up a good libra: books, magazines, trade journals, etc study of the questions-and-answers partment in the women’s pages of metropolitan newspapers will indicate t general trend of the queries to be pected from women. These queries answers should be carefully indexed filed. For men, the problem is a more difficult; if the community farming one, the bulletins of the Bure of Agriculture and the farming pay will prove mines of information, while many farmers read these, onl few file the information for future re‘ ence. A good file once built up, an vertisement in the local papers offe: information along these lines, shou bring results, perhaps slowly at first, growing in volume as the extent and liability of the information are appreciat The ideas herein outlined are capa of almost indefinite expansion, and, int: ligently applied, will lead to a life cheer and service for any shut-in, adequate financial reward. Cleaning Rusty Crosscut Saws An excellent method of cleaning polishing an old rusty crosscut saw follows: Drill a vertical hole in the « ter of a small stump, and also saw a across it, passing through the hole; depth of this cut should equal the wi of the saw, minus the teeth. Invert saw :n the cut, allowing the teeth to ject above the surface of the stump the hole around the saw with fine s and moisten with a little water working the saw as if sawing, it quickly be scoured as clean and bright when new.—J. L. Jackson, Bass, Ar!

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POPULAR Auto-Trailer Rowboat Truck During the dry days of summer, many vers are reduced to shallows and pools, and to reach a good fish- or bathing location, without having to push or pull the boat over the shallows is impossible. Having this in mind, the rowboat truck illustrated was made from the front axle of an old automo- bile, to which two boards were bolted; the outer ends of the boards were bolted together, as shown. MECHANICS 973 supported by the axle instead of the planks. This truck is easily fastened to the rear of an automobile and hauled at fair speed over average roads to a place Crosspieces were nailed to the boards to serve as . cradle for the boat and prevent it from working it of position. The boat is placed on the truck so that most of the weight is When Summer’s Heat Dries Up the Streams So That Deep Water must be Sought Elsewhere, the Boat can be Loaded onto This Truck, Hitched behind an Auto, and Hauled to the Nearest Deep Water where the water is deep enough for the engine.—A. E. Granville, Barbourville, Ky. Lamp Shade for the Photographer The photograph shows an improvised amp shade for use in a photographer’s dark room when developing prints. The shade is made from an amber-colored bottle, with a neck large enough to ad- mit the end of a lamp socket. On some bottles the flange on the neck fits nicely in common shade holder. The bottom of the bottle is removed and the rough edges are ground down, to prevent injury. The bottle may be cut in several ways: A car- borundum disk hav- ing a thin edge, if kept wet and rotated at a high speed, will cut heavy glass, but the bottle must be fed against the wheel very gently. A better way is to make a file mark —clean but not very deep—around the bottle and heat it with a long slender fame while slowly rotating the bottle. lt is very important that the gas flame should not spread over the surface of the glass, for it is only the file mark that should be heated. A mere glanc- ng touch is sufficient, and the ill usually crack off in a very clean cut. Sometimes a fine platinum wire is wound around in the file mark and heated by n electric current. Less common is the rick of wrapping a strand of cord, soaked glass in kerosene, around the mark and igniting it. The principle is the same in each case. The unequal heating of the glass causes it to break, and, of course, it breaks at the weakest point—the file mark.—Paul J. Garvey, Chicago, Il. Preventing Damage from Storage- Battery Acid Storage batteries, used for radio pur- poses, are often set on the carpet or on the varnished and polished floor, and, while this may be un- avoidable, it is not advis- able to take chances of having the rug or the floor finish ruined by any acid that may acci- dentally be splashed out, or that, in case of old batteries, may seep through the bottom T hi danger is eliminated by the use of a sha low wooden box filled with sand, in whi the battery is set, as shown in the dra ing. A pair of handles, made of stout wire, are attached to the box to facilitate ing and carrying the battery Any acid that seeps through the battery case will be absorbed hy SPACE FILLED WITH SAND\ the sand

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POPULAR MECHANICS Simple Clothes-Drying Rack the strongest part of the pen, and, it should be the barrel, it will be abso The simple wooden clothes rack illus- lutely leak-proof. If the shellac used trated consists of two 1 by 3%-in. rails, too heavy, it will not make a neat job, held together at their ends by small and if it is too light, it will set befo: it can be wrapped; it should have the consistency of flowing varnish—E. H ROUNDED Taylor, Howell, Tenn. -+-—---- 6%-- _ _ TcLoTHes sticx All Adjustable Hanger for Baby’s Swing BRACKET. The adjustable hanger shown in tl i drawing is adapted for the common baby swing of canvas, and is well worth mal ing for mother’s convenience as well baby’s safety. It is made of two lengths of “e-in. iron rod, bent to the shape indicated. One oj the rods is fitted with a swivel, to whi coil spring is attached. The clamp co: sists of two washers: a guide washer tl is doubled to slide over one rod, and cam washer that is riveted loosely tween the sides of the guide washer shown. The rod that has the coil spri attached to it is bent at the upper « and riveted loosely in a hole drilled the cam washer, so that the weight the swing, with its occupant, will for the washer tightly against the other 1 Clothes Rack for Drying Clothes Indoors That will Te Dame : a ee yer be Found of Great Convenience to the Housewife: rhe hanger must be made accura The Sticks may be Removed in a Moment so that the guide will slide freely, it may be made any desirable length, though one measuring 18 in., when clo brackets. The rails are notched to re- ceive the clothes sticks, and may be made any length desirable; they are fastened to any convenient wall or partition, about 5 ft. above the floor. The clothes sticks are made of 1 by 1%-in. poplar, and are BEARINGS - 6 ft. long, the part extending beyond the DOUBLED rails being rounded on top. When remov- ee a | ing the clothes, all that is necessary is to ir draw the stick out of the bracket and allow the clothes to slide off into a rg 4 basket —M. E. Duggan, Kenosha, Wis. Repairing a Fountain Pen To repair a split fountain-pen barrel jg IRON ROD _| or cap, coat the section to be repaired — with shellac, covering the barrel or cap all the way around. Then, before the shellac sets, wrap this section with silk thread as uniformly as possible, and with SWIVEL___--*" all the tension that the thread will stand, making no provision for the ends of the thread except to smooth them down well be in the setting shellac. After the shellac —— = —— is dry, which —_ takes a few minutes, Adjustable. Hanger for the Baby’s Swing That : : . pete ‘ Entirely Safe and Proves a Great Convenienc the job is finished by covering the sec- for the Mother: It Locks Itself Tightly tion with another light coat of shellac, using the fingers in both cases to apply has been found most convenient.—A it. The section thus repaired will be Long, Springfield, II. SPRING __--

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POPULAR MECHANICS A “Safety-First” Toy Gun rhere is probably nothing that appeals to the average boy quite so much as a vun. However, a real gun is a dangerous thing to put into the hands of a small boy, and it is not by any means safe even for a larger one. Even the toy air gun not safe, as the small bullets shot with it may easily destroy the eyesight. A very inexpensive and serviceable toy gun, and one that is quite safe, is shown in the drawing; it can readily be made from a length of 1l-in. pine board and a few eces of sheet metal. the board is shaped to the form of he gunstock and barrel, and a slot cut hrough it, as shown. The foresight, t and hammer are made of metal. kind. of soft metal that can be cut easily with a hacksaw or cold chisel is used; brass, from 46 to ¥% in. in thick- ness, is perhaps preferable. A groove to hold the foresight, is cut in the point of the barrel, and the hammer and trigger are pivoted on pins driven through the stock. A small coil spring, set in a hole drilled in the butt, forces the trigger for- ward, so that the gun can be cocked like iny other gun. A rubber band is hooked over the foresight and stretched back over the cocked hammer, and the gun is then loaded. When the trigger is pulled, gger, Any Weed-Pulling Fork for Hoe Long-rooted weeds often grow so close to potato and tomato vines in the garden TRIGGER A “Safety-First’’ Toy Gun That Uses Rubber Bands as Ammunition: It Is Easy to Make, Shoots Quite Accurately, and Is Not Dangerous the rubber band pulls the hammer for- ward, and slips off, and the sudden re- lease of the tension propels the band forward with considerable force. The length of the barrel and the strength of the rubber band determine the distance that the band is thrown. The gun can be used for target practice, and will shoot quite accurately. Fly shooting with a gun of this type has been found to be an alluring pastime for the youngsters, and one that develops real skill—H. H. Sie- gele, Emporia, Kan. FLATTENED AND ORILLED FOR RIVETS Simple Fork Attachment for a Garden Hoe, That Enables Weeds to be Uprooted without the Danger of Cutting Near-By Plants that they escape notice until they have attained considerable height. As such weeds are often in a position where they cannot easily be reached with an ordi- nary hoe without endangering the plants, the attachment illustrated for uprooting them was devised, and found to be a practical and back-saving tool. A piece of %-in. round iron rod is bent to the shape shown, to form a _ two- pronged fork. This fork is flattened and drilled at the points indicated. sponding holes are drilled in the blade of the hoe, and the fork riveted to the blade. In use, the weed is gripped between the prongs of the fork, and the Corre- handle of the hoe pulled down, the edge of the hoe blade acting as a fulcrum. In this way the most stubborn weeds are uprooted It takes only a short time to make the attachment. Converting a Kerosene into a Gas Heater A kerosene heater of the common type can readily be converted into a service- able gas heater. Remove the oil recep tacle and wick, and fasten a circular stove gas burner in position with wire. The gas burner can be purchased at small cost, and furnishes considerable heat.

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Detector and Two-Step Amplifier for Dry-Cell Tubes By F. L. BRITTIN HE introduction of the dry-cell tube has made possible the operation of tube detectors and amplifiers without the use of a storage battery, and enables those who, because of the trouble inci- dent to the use of a storage battery, have been obliged to content themselves with a crystal detector, to build a set that will give evéry satisfaction. The detector described in this article is designed as a separate unit, for those who do not wish to expend a great deal of money at the start; the two-step ampli- fier can be added at any time. The re- sults obtained with these instruments are excellent; on a detector and two-step amplifier of this type, practically all of the large broadcasting stations in the country have been received in Chicago. The cost of the instrument is very rea- sonable, that of the detector being ap- proximately $25, including batteries, tube, and phones, and of the complete instru- ment approximately $58. These figures may vary a little in different localities, but, as none but standard parts are used in the instruments, they will ‘be found very close to actual cost. The instrument is one of the simplest it is possible to make, as there ‘are no coils to wind or tap, and no switches to mount. The inductance used is a 75-turn honeycomb coil, and tuning is accom- plished by means of a 23-plate “vernier” condenser; the wave-length range is from 150 to 500 meters. The panel used for the detector is 6 by 6 by 9-in. bakelite, laid out and drilled as shown in Fig. 1. The panel is screwed to the base, which may be any piece of lumber 34 by 6 by 9 in. in dimensions; it is best to attach the panel to the base by means of angle brackets—shelf brack- ets will serve excellently for this. It is a good idea to stain and varnish the base, to add to the appearance of the finished instrument. The tube socket may be either of the types shown in Fig. 2; it is fastened to the base directly behind the %e-in. ports in the panel. The grid leak is also screwed to the base; this is of the standard 2- megohm type, but, if this is unobtain- able, a piece of bristol board, 34 by 2% in. in size, can be used instead. A pencil mark drawn down the center of the bristol board, and brass wood screws are used to fasten it to the board, taking care to see that the screw heads make good contact with the pencil mark before wiring and screwing down tight. 1S 976 The rheostat is mounted at the left oj the panel, below the ports, as shown Fig. 3, and the mounting for the honey comb coil at the top of the panel, in th. center. The 23-plate vernier condenser is fa tened to the right-hand side of the panel; this must be of the type specified, as th selectivity of the detector depends entirely upon this condenser. The grid condenser is of standard ty): of .00025-mf. capacity, mica insulation, and may anywhere found convenient. be mount: preferably with The binding posts for aerial, ground, B-battery, phones, and dry cell are final! screwed in place. It is a good plan to put small brass or copper lugs behind these posts, and to solder the wires to t lugs. The instrument is wired tinned-copper wire; the wiring can covered with “spaghetti” tubing, if sired, or it can be left bare—busbar-ia ion—as shown in the photo, Fig. 5. Ev: connection must be well soldered, usi: soldering paste, resin, or resin-cored der; never acid, or acid-core solder. The B-battery is a 22'4-volt unit, is connected to the two posts in the u per left-hand corner of the panel, Fig. 3 The phones are connected to the t posts directly below; these should be a good make, and of not less than ohms’ resistance. The dry cell is co: nected to the two lower posts, the po tive, which is always the center post the cell, to the lowest post, and the neg tive to the one above. The aerial used is of the ordinary ty If one wire is used, it should be 150 ft. long; if a two-wire aerial is used it need not be more than 60 or 70 ft. lon constructed in the usual manner either case, the aerial should be 40 to 5 ft. above the ground for best results. T! ground wire from the instrument is | to a water pipe, the pipe filed bright, a: the wire fastened to it with a grout clamp. Instructions for installing aeria are given on page 814, in the May, 1923 issue of this magazine. The panel for the two-step amplifier with > (Ml) | ill Me by 6 by 12-in. bakelite, and the layout of the holes is shown in Fig. 7. 1 panel is laid out first, drilled, and t! jacks and rheostats are mounted in plac It should be noted that two of the jack on the right-hand side, Fig. 8, are of t! two-circuit type, and the one on the lett that for the second step of amplificatio: No. 14 125 to

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DRY-CELL TUBE 9 DETECTOR-PANEL TEMPLATE Fis.! Fic.2 COIL MOUNTING 23-PLATE VERNIER FOR 75-TURN COIL ‘ CONDENSER -. AERIAL-- 3 6X9 PANEL-, RHEOSTAT, : GROUND _ 2-MEGOHM GRID LEAK DRY CELL REAR VIEW OF DETECTOR SET SOCKET“ FOR DRY-CELL TUBES Fic.3 Fig.4 ire 1, Template for Laying Out Detector Panel; Figure 2, Dry-Cell Tube and Sockets; Figure 3, Rear of Detector Panel, Showing Location of Instruments, Battery and Phone Connections, and Method of Figures 4 and 5, Front and Rear Photos of Completed Detector, with Batteries, Ready for Operation as Soon as the Phones are Attached

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AMPLIFIER-PANEL TEMPLATE TO PHON ony CELLS 22}-VOLT B-BATTERIES ceeTOR ban OF DETECTOR PANEL rc JACKS, TWO-__ - jg *6 X12 PANEL~ “CIRCUIT TYPE ‘ co eee we & aa a RHEOSTAT The RHEOSTAT A qt! Wy + ca CIRCUIT TYPE | AERIAL PRIMARY ----—7 ‘---TRANSFORMERS --------- -/ 2-MEGOHM (GRID LEAK 00025-M “GRID COND. Fic + bln = 225-VOLT B BATTERY ' ; a DRY CELL ~, 23-PLATE VARIABLE SECONDARY, COND. primary, / CUTERLEAD VERNIER ARY,, TYPE GROUND ¢ TRANS DET. JACK 2 DRY CELLS ‘hhh 45VOLT B-BATTERY FOR AMPLIFIERS, 2: 225 V.UNITS — i Fic. 9 lL -Fig.10 Figure 6, Front View of Completed Amplifier Unit; Figure 7, Template for Drilling Panel; View of Amplifier Assembly; Note Especially the Method of Connecting Diagram for Detector and Two-Step Figure 8, Amplifier ; the Batteries; Figure 9, W Figure 10, Photo Showing the Back of Completed Am 978

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POPULAR of the single or open-circuit type. e transformers and tube sockets are unted on the base, which is a % by 6 12-in. board. The transformer for the t step is a 10-to-1 audio-frequency nsformer, and the one for the second p is of the same type, but the winding io is 3 to 1. The transformers in the drawing are marked just as they will be found on the majority of transformers, so that no difficulty should be encoun- tered in wiring; F stands for filament, G grid, and P for plate. If any trouble hould occur, due to different markings on the builder’s transformers, a reference » the circuit diagram in Fig. 9 will make clear. [he binding posts at the left of the nel, Fig. 8, are for the batteries. Two cells are used, one for each amplify- ng tube, and are connected in parallel, that, while the voltage remains the same as that of a single cell, the amperage increased. The dry-cell, or “peanut” tube, as it is popularly called, operates at 1.1 volts—the voltage of one dry cell. e positive lead from the cells is con- cted to the center post; the negative ead is connected to the negative terminal of the first of the 22'%-volt B-batteries, shown above the panel. The B-batteries are connected in series, e positive lead being connected to the MECHANICS qQy*¢ Jou upper post on the panel, and the negative lead to the lowest post. When the wiring has been done, the instrument is complete. If the builder desires, he can, of course, place each unit in a cabinet, or combine them in one cabinet, but this is not necessary. To connect the detector to the ampli- fier set, all that is necessary is to discon- nect the phones from the former, and tq connect the phone posts on the de- tector straight across to the correspond- ing posts on the amplifier, as indicated by the dotted lines in Figs. 3 and 8, and in the wiring diagram, Fig. 9. The phone- lead terminals are then removed, and plugs substituted for them. The detector batteries remain exactly as they were. To operate, put on the phones, turn the detector-tube rheostat until a_ hissing sound is heard in the receivers, then adjust the condenser until the signals “come in.” If the amplifier is connected, the phones will be plugged into the first jack. Now plug in at the second jack, and turn the first amplifying-tube rheo- stat until the signal is loud, but clear: this is usually loud enough for comfort when listening to near-by stations. Dis- tant stations will require the use of the second step, which is operated in exactly the same way as the first. A loud speaker can be used on the second step. MATERIAL LIST bakelite panel, %i6 by 6 by 9 in.......$1.08 bakelite panel, %ie by 6 by I2 in....... 1.44 baseboard, % by 6 by 9Q in. baseboard, ¥% by 6 by 12 in. dry-cell tube sockets....$ .75 to $1.00 each. } dry-cell tubes 6.50 each. } rheostats ree .75 each, 23-plate vernier condenser with dia $4 o $5.00 1 75-turn honeycomb coil 1 honeycomb-coil mounting 1 .00025-mf. grid condenser $ 35 2-meg. grid leak.... 75 two-circuit jacks » $1.00 each open-circuit jack .70 each 10-to-1 audio-freq. transformer . 3-to-1 audio-freq. transformer : dry cells ; $ .40 each 22'%4-volt B-batteries....$1.75 to $3.00 each pair 2,000-ohm phones .... $4.50 up. 25 ft. No. 14 tinned-copper wire : 20 4 3-ft. lengths spaghetti tubing 17 each. pet Ct et et Renewing Old Rugs Brussels or Axminster rugs, known as pile” rugs, have a very hard finish on the underside when they are new, but fter they have been used for some time they soften. This is true particularly of the smaller rugs, perhaps because they re subjected to more frequent and vig- rous shakings, and they then become innoying because of their tendency to vrinkle, which causes them to wear out on, the threads breaking along the folds. Some years ago a dealer in rugs told me that it was a wise plan to have the backs of rugs renewed occasionally with a glue preparation to lengthen their life Having some small rugs that were worn, I decided to experiment with them. I found a package of some wall “sizing” in the house and proceeded to dissolve it according to directions, but made the solution thicker than usual so that it would not penetrate the rugs. I then placed the rugs face down on the floor, and spread the solution on the back with a broad, flat brush. When the rugs were dry, they lay as flat and firm as when new. It is sometimes necessary to stretch the rugs and tack them down on the floor until dry, as they must be kept flat —Stella Henderson, Lake Mills, la »

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POPULAR MECHANICS Convenient Cupboard Stepladder square cartons. The arrangement wo well, but considerable time is required proper packing. The following met! saves a great deal of time and is enti satisfactory: Fill the berries into divi pasteboard egg cartons, which are m to hold a dozen eggs each. The ber: ship well in this manner, if they shaken down gently. The stepladder for the kitchen cup- board shown in the drawing proves very handy for the housewife, as it fits in the Heating Water with Oil Stove A simple homemade water-heating tachment for an ordinary oil stove , be made up at little expense. The tachment consists of a water tank an length of ¥ or %-in. copper tubing, ranged as illustrated. Two coils formed near the center of the tubi: The diameter of the lower coil should a little greater than the diameter of t wick of the stove, and that of the up; coil a little smaller. The ends of tubing are attached to a can of sev: gallons’ capacity, or to a small tight barrel. The connections can made with the parts of a discarded headlight of an automobile, or if tl are not available, with similar plates n Figure 1, Ladder Ready for Use; Figure 2, Out- of flat iron, drilled as shown. One p side of Lower Section of Cupboard Containing Lad- is soldered on each pipe near the « der; Figure 3, Ladder Folded to Slide into Recess and the other plate bolted to it on inside of the tank, after the end of lower part of the cupboard when not in use, and can be drawn out and opened — in a moment when needed. ; WATER TANK -» A space, about 6 in. wide, is partitioned off in the lower cupboard, to hold the ladder when folded. A small stepladder that will fit in this space is made, or one can be purchased and fittedin. To the in- side leg is bolted a wooden block, shaped as shown; this block slides on two strips of wood nailed to the sides of the com- partment. The leg and block are bolted together loosely to permit the former to move freely. Part of the baseboard is then cut out and bolted loosely to the other leg. It is a good idea to reinforce this piece of baseboard, as it is otherwise likely to break. When the ladder is put in the cupboard, as shown in Fig. 2, the cut-out piece is in line with the rest of the baseboard, as in Fig. 2. When the A Water-Heating Attachment for the Oil Stove, 1 . ° Which Several Gallons of Water can be Heat ladder is pulled out and unfolded, as to the Boiling Point in a Very Short Tim« shown in Fig. 1, the steps are situated ‘ ’ conveniently under the shelves above. tubing is passed through the tank P ae Packing is, of course, used to prev Shipping Berries by Mail leakage. | A slot, just large enough to admit The usual plan for sending any variety tubing, is cut in the side of the sto. of berries through the mail, by parcel upward from the lower edge, to allow post, is to put up the berries in small upper part to swing back freely, which paper bags, and fit the bags into shallow, necessary when lighting it. The wat:

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POPULAR is placed on a wooden box or low | to bring it to the correct level. The er part of the tubing must be perfectly -ontal and enter the tank near the rom. With this arrangement, water be heated to the boiling point in a t time. “Tumbling Barrel” Provides Sport for Bathers \ novel device that is popular at a \isconsin bathing beach is shown in the istration. An empty vinegar barrel, of ut 50-gal. capacity, is filled with ce- ent, to the level indicated, after nails ve been driven through the sides to eep the cement in place when set. The unghole is tightly plugged, and a 1-in. flange is screwed to the center of upper end. Into this flange a 10-ft. idder,” made of tees and long nipples, rewed, which completes the device. When placed in the water the “tum- bling barrel,” as it is called, floats with upper end about 1 ft. above the sur- e of the water. The trick that affords much amusement to the bathers is to ount the barrel and climb as far up the ist as possible before the barrel tips. he cement ballast of the barrel main- tains the equilibrium of the “tumbler” as long as the bather stands upon its top, any attempt to climb the mast re- sults in some amazing gymnastics—and | eventual ducking

CEMENT _-BALLAST < ——— —-- *

A Novel Device Called the “Tumbling Barrel’ That Is Yopular at a Wisconsin Bathing Beach: The Trick ‘Ss to Preserve the Balance While Climbing the Mast MECHANICS 981 Burning Out Stumps Effectively When clearing land of stumps for farm- ing purposes, it is desirable to have the soil free from all roots as well as the stumps. When the stumps are pulled,

Effective Method of Burning Stumps: An Injection of Saltpeter Enables the Fire to Creep to the Ends of the Roots, Until They are All Consumed the roots often break off. Some of these are overlooked and remain in the ground, and this, of course, is highly objection- able, as they will catch on the plowshare. A good method of clearing land of stumps is to burn them out with the aid of saltpeter. Saltpeter, if so applied as to penetrate into the heart of a stump prop- erly, will in a year’s time reach down to the very ends of the roots. During the summer, when the stumps are thoroughly dry, drill a 14-in. hole, about 3 or 4 in. deep, in the center of the stump, as indi- cated. Into this hole put 3 tablespoonfuls of saltpeter; then close the hole with decayed wood and dirt. During the fol- lowing summer, dig out the dirt, fill the hole with kerosene, and set the stump on fire. It will burn slowly but surely, and will keep on burning under the ground until every piece of root is consumed. The ac- tion of the saltpeter makes a slow-burning match of the fibers of the roots, and car- ries the fire wherever it has penetrated — J. V. Romig, Allentown, Pa,

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POPULAR A Homemade Statoscope The statoscope is a simple form of aner- oid barometer that is very sensitive to small changes of air pressure. It will readily detect the difference in barometric pres- sures of two levels 5 ft. apart, and w ill demonstrate that the air pres- sure is greater at thefeetofa standing person than at his head. A homemade statoscope may be constructed as follows: Take a length of glass tubing having a small bore, open at both ends, and, by means of a gas flame, bend it to a U-shape, as shown in the photograph. Suck a few drops of water or oil into the tubing, just enough to fill a part of the length between the bends. Now in- sert one end of the tubing into the in- terior of an empty vacuum bottle of 1-qt. capacity, by forcing the tubing through a tight-fitting hole in the cork. Vaseline should be used on the tube to insure an air-tight connection. The bottle should be suspended, by cords, upside down and absolutely plumb, so that no motion of the water may occur due to the instru- ment being tipped. The air in the bottle is separated from the outer air by the water “plug” in the tubing. Any change of volume of the air in the bottle will therefore be regis- tered by a motion of the water plug. Only two factors will change the volume of the air in the bottle: change of temperature and change of pressure. By using a vacu- um bottle as a container, temperature changes will not affect the statoscope ap- preciably, except over long intervals of time. There remains only the influence of a change in pressure of the atmosphere, transmitted to the air in the bottle by means of the water plug or piston. For small changes of atmospheric pres- sure, the relative change of volume of the air in the statoscope is equal to the relative change of pressure in the external air. If the barometric pressure changes by 1 part in 40,000, the volume of the entrapped air will change 1 part in 40,000 MECHANICS also, and, as 1 qt. of air approximate 69 cu. in. in volume, the water plu; the tubing will move a little more tha: in., if the diameter of the bore in tubing is %6 in. This corresponds rou ly to the change of pressure accom; ing a change of elevation of 6 ft., elevations less than 1,000 ft. above level. If two enlargements, or bulbs, blown in the tubing, as shown in photograph, the water will not be dri entirely out of the tubing by grea changes of pressure; air will simply bub- ble into or out of the flask for conti: ously increasing and decreasing pressure respectively. As used in balloonin; the bubble “breaks inward” the balloo: falling ; if it “breaks outward” the ball is rising. The rate at which the bub! break is a measure of the rate at w! the balloon ascends or descends. Ii statoscope, with the enlargements in tubing, is carried in an elevator, the nu: ber of feet change of level between cessive breakings of a bubble serve calibrate the device to read differe: of level in actual feet. The device ca: carried in an automobile winding its up into the hills, and, from the counted number of times the bubble breaks, rise in feet above the starting point be ascertained. Of course, the numb feet elevation required to “break a ble” varies with the actual elevation that the device should be calibrated the region where it is to be used. To take double precaution against t perature changes in the air within statoscope, it is well to wrap the b in layers of felt. It is, of course, pr able to use a drop of oil in the ¢ tubing instead of water, as the oil d not evaporate. Holding the Automobile Hood The usual practice of raising one-! of an automobile hood and restirg i the edge of the dash is none too sat« the vibration of a running engine, o1 slight jar, will dislodge it. To prevent this, cut a number notches, about 14 in. deep, along the of the dash, near the socket into w the hinge rod of the hood fits. T! notches must be as close to the edg the dash as possible, so that, when hood is closed, the notches cannot seen. When the hood is raised, its lo edge is set in one of the notches, to | vent it from slipping down —L. B. k bins, Harwich, Mass.

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PRIZE OFFERS 4Nn ANNOUNCEMENTS JE-MILLION-FRANCS ENDURANCE PRIZE FOR AERIAL ENGINE nternational prize of 1,000,000 francs (nor- ibout $200,000) is offered by the French Com- for Aeronautic Propaganda for the internal- tion aerial motor showing the greatest endur- cation for the privilege to compete, however, made on or before Dec. 1, 1923. This should mpanied by a sum of 40,000 francs, and a tion of 10,000 francs for the test. Of the sum one-half will be returned for motors g the elimination tests. The latter sum will be 1 only to competitors withdrawing _ their before March 1, 1924, on which date the tests begin. idditional information address: Aviation Com- f the Aero Club of France, 35 Rue Fran- Paris, France. EXPOSITION OF VOCATIONAL SCHOOLS TO BE HELD IN CHICAGO rouse greater interest in vocational training give those who are contemplating taking up or a vocation an opportunity to see “‘living”’ demonstrating the various courses offered, position of trade and vocational schools is to ld at the Coliseum in Chicago from May 30 ne 10. The schools planning to occupy booths nt a wide range of human activities. Among il list of 83 named, may be mentioned steam ering, nursing, architecture, automotive elec- masonry, office work, painting, bridge de- dentistry, and engraving. AMERICAN BALLOON RACE IS SET FOR JULY FOURTH, THIS YEAR 4 has -been decided upon as the date of national elimination balloon race starting at In- lis, Ind. At least 14 balloons will start, ling to the National Aeronautic Association. will be awarded for the distance navigated, 1000 going to the winner, $800 to second, $600 rd, and $300, $200, and $100 to fourth, fifth, sixth finishing position, respectively. Three of entries, it is said, will have craft of unusual de- and the army and navy air services will both ete. The contest is being promoted by the ro Club of Indianapolis, and the Chamber of Com- of that city. AMERICAN-LEGION POST ESTABLISHES MEMORIAL SCHOLARSHIP A memorial scholarship in honor of the dead of 86th Division, has been established at the Uni- ity of Chicago by Blackhawk Post, No. 107, of American Legion. It will be awarded this year e high-school student writing the best essay on theme, “Why I Am Proud to Be an American.” he essay must be typewritten, and must reach 705, 21 North LaSalle St., Chicago, Ill, on before May 20, 1923. Five hundred words is the num length considered. FINANCIAL AND INDUSTRIAL RESEARCH BASIS FOR ANNUAL CASH PRIZES For the greatest original contribution on any sub- relating to business Cyvaonment and the modern ompany, a prize of $?, is to be awarded 1925, and a similar prize ceed three years there- by the Chicago Trust Company. No restric- ire made as to the eligibility of the contestants. other awards, of $300 and $200 respectively, presented annually for briefer studies, not ex- ng 20,000 words, are also announced. This con- however, is limited to bank employes, and to rgraduate students of economics, business, finance, Ww closing date each year will be August 31. PURCHASING POWER OF CONSUMERS SUBJECT OF ESSAY CONTEST Prizes of $1,500, $800, and $500 are announced by the J. Walter Thompson Company, of 242 Madison Ave., New York City, for the best essays on “A Statistical Index of the Purchasing Power of Con- sumers in the United States.” It is hoped that the contestants will furnish material which will help in developing a more accurate measurement of the pur- chasing power of communities in this country. ‘he competition is open to all, the manuscripts may be of any length, and the closing date is Sept. 30, this year. CIVILIAN ENGINEERING STUDENTS MAY CRUISE ON NAVAL VESSELS The Navy Department, it is reported, has decided to offer to a limited number of leading universities and colleges, an opportunity to send two engineering students each to a cruising ship for a short time in the summer. Commanding officers of the vessels will assign them to the ship’s personnel, and then see that they are acquainted with the construction and operation of the machinery on board. It is expected that each student will have two weeks at sea. DESIGN FOR SARAH BERNHARDT TABLET WANTED BY ORPHEUM CIRCUIT For the best placed on the the Orpheum of $250. be given. The sketches may be in ink or crayon, the idea rather than the execution being more important Address J. J. Nash, manager of the Palace Music Hall, Chicago, III design of a memorial tablet to be tomb of Sarah Bernhardt, officials of Vaudeville C ircuit, announce a prize Four other prizes, totaling $250, will also CONTESTS PREVIOUSLY ANNOUNCED Medals, Diplomas, and Money Awards: August issue, 1921; awards offered by the Franklin Institute. The Franklin medal is for workers in tech- nology; the Elliott-Cresson is for original research work and invention; the Howard N. Potts is for im- portant development of previous discoveries and inven- tions. Each award consists of a gold medal with a diploma. There are also a silver medal, and a Cer tihcate of Merit awarded for meritorious discoveries, and cash premiums for certain work in optics. ne Million Francs for Best Motor: Announced January issue, 1922; closes June 1, 1923; address, Aero Club of France, Paris. Best Treatise Regarding Immortality: Prize $1,000; announced January issue, 1923; closes Dec. 1, 1923; address, Contest Editor, 2 West 47th Street, New York City. Awards to Further Science of a and prizes, amounting in all to about $20,000; an- nounced February issue, 19235. For ——¥.. ~ address General Electric Company, Schenectady, N. Y. For Best Work by American Chemist: An annual award of $25,000: announced February issue, 1923; address the Allied Chemical and Dye Corporation, New York City. Names for Great Lakes Steamers: $50 each; announced February issue, names must reach the company before the opening of navigation season in 1924; address the Detroit and Cleveland Navigation Company, Detroit, Mich. For Best Studies in the Economic Field: Four prizes from $1,000. to $200; announced March issue, 1923; closes June 1, 1923; address, Prof. J. Laughlin University of Chicago Motorboat Race, Miami Beach, Fla., to Havana, Cuba: Prizes $10,000; announced March issue, 1925 Write Miami Chamber of Commerce Essay on Economic Sebject: Prize $1,500; an nounced March issue, 1923; address the Simonds Economic Prize Contest, 470 Main St., Fitchburg Massachusetts. Announced Medals Two prizes of 1923; suggested When answering prize offers please mention Popular Mechanics Magazine

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QS4 POPULAR Pulitzer Prizes, ' WOTK In various For best lines; an- candidates Columbia University: literary and journalistic nounced April issue, 1923; nominations of must be made before Feb. 1, 1924. Scholarships for War Nurses and Ex-Service Men: Numerous scholarships provided at colleges and uni- versities throughout the country under the will of the late La Verne Noyes; announced April 1923 ; apply direct to colleges Most Practicable Device for Recording Mine-Shaft Signals: Prize of £250, or about $1,100; annoywnced May issue, 1923; closes 1923; address Rand Mutual Assurance Co. ad... £.. 0. wea AiZ. Johannesburg, Transvaal, S« rica. Name and Slogan for Hats to be Worn by Middle- Aged Women: Four ; announced May 1923; closes June 1, iH, Srothers & Cx is S$ Chicago. issue, issue, 19233; address Gage Michigan Dept Ave., MECHANICS Boys’ and Girls’ Short-Story Contest: awards of $160, and other prizes; issue, 1923; address The Haversack and The bearer, 810 Broadway, Nashville, Tenn. Greatest Benefit to Community Rendered by en’s Club: Prize, $1,000; announced May 1923; closes Sept. 15, 1923; address Club Pictorial Review, 222 West 39th St., New Yor Historical Essay on Eastern Hemisphere $200; announced May issue, 1923; 1923; address the Secretary of the torical Association, 1140 Woodward ington, D. C. Students’ Essays on Municipal Government: $250 and $100 for postgraduates; $100 for graduates; announced May issue, 1923; addr tional Municipal League, 261 Broadway, New City. Tw announce Jus Latest Watch closes | Ameri Building SCIENCE NOTES Fork DAILY USE FOOD RESEARCH BUREAU EXPLAINS VIRTUES OF STALE BREAD that the dry results Most housewives know bread when not too of the loaf. The Food Research pointing out the wholesomeness explains that, in baking, much of bread is held by the starch tinized. As the loaf comes starch jelly, distributed tains all the moisture it can hold As the bread cools, the starch gives up some of the moisture, which is absorbed by the other constitu- ents of the loaf, changing the crust from a brittle substance to one more pliable and soft, while the gluten of the crumb is given a toughness and firm- which as fresh bread it did have. This accounts both for the staleness and for the good results of again heating it. Wholesale bakers lose millions of through agreeing to take back stale loaves. This the price to consumers Bread a day old is as nutritious as when freshly baked, the bureau asserts. warming of stale in a freshening up Bureau, in a report of the stale loaf, the moisture in the which has been gela- out of the oven, this throughout the bread, con- ness not dollars yearly raises SNEEZE GAS FOR USE IN ILLUMINATING GAS TO PREVENT SUICIDES Introduction of a new eze-gas compound into illuminating gas, in order to prevent suicide by asphyxiation and deaths from accidental escape of gas in burners and stoves, was suggested recently by Gen. Amos A. Fries, of the chemical-warfare service. One part of it in 10,000,000 of illuminating gas would be sufficient for the purpose, General Fries declared. No matter how determined the suicide might be, he could not refrain from sneezing so long that he could carry out his suicidal intent. The gas would also serve as a warning of escaping gas from stoves and burners. When the illuminating gas is burning, the sneeze-producing element is consumed without any effect on the room's sne occupants. TWO CHILDREN KILLED BY TOY BALLOONS Two children have died recent; of a toy balloon being sucked down and the other when a balloon burst The first case aroused the attention of fraternity by reason of the fact that lodged in the throat, became partially every breath drawn by the unfortunate child, result- ing in its speedy suffocatior The second death occurred when the mother of the child, giving it a slight slap on the cheek, caused the toy to explode. The exact cause of death was not made plain, but the into in as one throat, mouth. the medical the balloon, inflated by result, the its j physicians believed the rush of air from t balloon, passing into the child’s throat, Emergency treatment in such cases depends upon the location of the object in the th: explained. An immediate operation is the in most cases, unless the object is so it can be reached by a hooked drawn carefully from the throat the victim. Neither suggestion ance of saving life. — sult or piat instrument ar as not t carries with so UNIVERSITY PROFESSOR FINDS THI WORDS USED MOST OFTEN “to” are 1 Or li The words “the,” ‘ inguage se I mi quently used of any in the English ing and writing, Dr. Ernest Horn, of the of lowa, finds. From a study of many com and types of written material, Doctor H the deductions that 300 words make up 75 | SIT of all used in common speech and writin, words form 90 per cent; 2,000, more thar cent; 3,000, 98 per cent; 4,000, 99 per cer 6,000 make up 99% per cent. Ten words form more than a fourth used, Doctor Horn These to the three already noted, ‘‘you,” “we,” “have,” and “it.” He group of 100 words which, he cent of all that are used “and,”” and asserts. are, ~~ has also believes, fort FAT MEN STAND MIGH TEMPERATUR! BETTER THAN THIN ONES That fat men ity better than satistaction olf a undertook a study agents on the endure high temperatures and thin ones has been proved group of scientists who of the effects of these two human body. In the course investigations they also blasted the popular that drinking iced water following exposur« temperature caused serious and sometimes fatal The experiments covered a rather extende Ww of time and were conducted by the America of Heating and Ventilating Engineers, vh¢ Bureau of Mines, and the Carnegie Institute nology. The scientific object was to determ would be the right temperature and degree ity in a room most comfortable to a humat One of the important results of the study discovery that the human body can withsta variations in temperature without serious'y ba Also, it was learned that the faster beatings heart of a person in a heated room is r for discomfort more than the heat itself was learned that sweat is the chief fact sore eyes when one becomes heated. [* accordance with the editorial policy of this magazine never to accept compensation in any forn for what appears in our reading pages, and also to avoid all appearance of doing so, we are oblig« to omit the name of the maker or the seller of any article described. kept on file and will be furnished free, by addressing zine, Chicago. [Editor.] Fo haw | This information, however, 15 Bureau of Information, Popular Mechanics Maga-

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POPULAR MECHANICS ADVERTISING SECTION Just Out LS, J s f aime (; UT ny on for FREE Adjusted to the Second Adjusted to Temperature Adjusted to Isochronism Adjusted to Positions 21 Ruby and Sapphire Jewels 25 Year Gold Strata Case Your Choice of Dials (Uncluding Montgomery R. R. Dial) Thin Cases _ EE ERED EID “Down New Ideas in Onlys Only One Dollar Down will buy this masterpiece of watch manufacture. The balance you are allowed to pay in small, easy, monthly payments. The Burlington — a 21-Jewel Watch — is sold to vou at a price much lower than that of other high-grade watches. Besides, you have the selection of the finest thin model designs and latest styles in watch cases. Don’t delay! Write for the FREE Watch Book and our SPECIAL OFFER today. While This if 7 [ Q SpecialOferlasts Get the Burlington Watch Book by sending this coupon. Find out about this great special offer which is being made for only a limited time. You will know a great deal more about watch buying when vou read this book. You will be able to “steer clear” of the over-priced watches which are no better. Remember, the Burlington is sent to you for only One Dollar down, balance in small monthly permenta, Send the coupon for watch ook and our special offer TODAY! Burlington Watch Company Dept. A-935, 19th Street and Marshall Blvd., Chicago Canadian Address: 62 Albert Street, Winnipeg, Manitoba Burlington Watch Company Dept. A-935 , 19th St. and Ma Bivd., Chicago Canadian Address: 62 Albert St., Winnipeg, Manitoba Please send me (without obligations and prepaid) your free book on watches with full explanation of your $1.00 down offer on the Burlington Watch.

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POPULAR MECHANICS ADVERTISING SECTION Ne LASQBSC “Short Cuts to Good Carpentry ( Vol.36, CypressPocket Libra) im 48 pages of autho: Nm struction (simple, « M stimulating) fully ; \ and with big Sup; x 36 in. with detailed N ing Drawings tl how to make tw jobs’’ easy, safe and & nomical of both lab and Lumber. Read wh “Rural Life,” (Roche ter, N. ef Si of \ “SHORT CUTS to \ GOOD CARPENTR a -% : \W\ 1) 4, fi \INETRADY 17 OUT WE TRUST YOU OWN JUDGMES and SELF-INTERI sit INSURE CYPRESS 0: € “The Wood Eterna oy going up by kee] ) “py A //4 YY)" ru! a When planning a Mansion, a Bungalow, a PMP PPPPAAINII AAA . 7 Farm, a Sleeping-Porch or just a Fence, remember— With CYPRESS gou BUILD BUT ONCE."" TRY IT. ist our “ALL ROUND HELPS DEPARTMENT” help YOU. Our resources are at SOUTHERN CYPRESS MANUFACTURERS’ ASSOCIATION > 1219 POYDRAS BLDG., NEW ORLEANS, LA., or 1219 GRAHAM BLDG., JACKSONY (Please address nearest office) ——_—_—_—. : — : ee es $e ; KNOW NY INSIST ON TRADE-MARKED CYPRESS AT YOUR LOCAL DEALER'S IF HE HASN'T IT—teT nd

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TS to ENTR book Popular Mechanics Magazine 200 E. Ontario Street, Chicago, U.S. A. H. H. WINDSOR, Editor London: Hachette & Cie., $17 King William Street, Charing Cross, W.C. 2 Paris: Hachette & Cie., 111 Rue Reaumur Melbourne, Australia ——_—_—————— — ISSUED MONTHLY To all other countries in the Postal Union - SUBSCRIPTION: In United States and its possessions, also Canada, Cuba, and Mexico, per year, postpaid $3.00 ° - . - - 3.50 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. y by POPULAR MECHANICS CO, Copyright, 1923, by H. H. Winpsor. Contents for June, 1923 Airplane Fighting Wheat Rust Traps Germs....... 821 Airplane, Hospital, Designed for Surgical Work.... 907 Airplane Landing Field Marked to Aid Airmen... Airplane Records and Styles, New, Appear in Field of Aviation Arc Welding Device Lowers Voltage Asphalt Pavement Melting Machine, Portable Automobile Aids Sinking of Mine Shaf Automobile Axles, Broken, Emergency Device Repairs Automobile Cam Gear Increases Steering Leverage. . Automobile Device Registers Quantity of Oil and Gas in Tank Automobile Gasoline Gauge Holds Reserve Supply... Automobile License Plate Carrier Fits Various Sizes 900 Automobile Parking Light Works by C Automobile “Safety First’ Guard Rail Envelops Car Automobile Sleigh Has Helical Rear Wheels Automobile Spring Lubricating Tool Shaped like Hatchet Automobile Steering Attachment Improves Control.. Automobile Steering Wheel Lock Easily Installed.... Automobile, Streamlined, Cuts Head Resistance Automobile Trailer, Mammoth, Has Freight Car Ca- pacity Automob Uniform Automobiles, Endless Tread, Successful in Norway. . Automobiles, Steam, Pilot Ignition Designed for.... Aviation, Japan Quietly Making Advances in........ Band Saw, Portable, Cuts Wood and Metals Bank Alarm, Electric, Protects from Holdups Barber Shears, Comb on, Intended for Home Use.... Baseball Glove Protects Throwing Hand of Catchers Bean Harvester Threshes in Same Operation Bearing, New Roller, Special Sleeve Features Blowtorch, Gasoline, Has Fool-Proof Features Blueprint Drier Features Copper Cylinder Boat Model, New, Oxford Racing Crew ma Boat—Rowboat, Knock Down, Simple and Boiler, New, Designed for Liquid Fuel Brushes, Rotary, to Aid Housewives Bundling Machine Makes Scrap Metal Bales........ 8 Rungalow, New Circular, Saves Space and Steps.... Bungalow, Pupils Build within School Butter Vanity Cases Now Used in German Cities... Caisson Hoist Facilitates Foundation Work Canal, New Dutch Card Index, Simple, Intended as Calendar Memo File ‘Cash Register,” Giant, Aids University C i Check Protector Weighs Only Half Pound Children’s Picture Page Civic Features Clock, One Hand, Aids in Avoiding Errors Clock, World’s Time, for Radio Purposes Clutch, New Type Friction, Ends Jerk Coal Mining in Kichomn with Streara of Water Coal Ships, Roller Mounted Towers Unload Coconut Festival Staged in Solomon Islands College, Yale, Branch of, Successful in China Concrete Walls, Colored Figures Add Life to, by Ar- - ompact. thur Jones Cookstove, Collapsible, for Cam Copper Noncorrodible, Cast under Hot Water.. tton Gin, New, Uses Two Sets of Saws... Cottonwoods, Sprayed, Shed No Cotton.. Culvert, Egg Shaped, Is Self-Cleaning Dam Repaired While Mills Run, by Thomas Dissecting Scope Is Compact and Efficient Drillin ool, Convenient, Is Motor Driven Dust, Tons of, Travel in Sky Eclipse, Crocker Pictures Show Sun Streamers on.. Egg Candling Machine Uses Acetylene Gas 9 Electricity—Striking Electrical Effect on High Volt- age Line 8 Electrotype Plates, Machines Routs, Three at a Time Elevated Railway, “Silent,” for Philadelphia, by Wm. A. McGarry Elevator, Simple Bucket, Stores Farm Grain Emery Wheel Attachment Faces Valves. . Explosions, Supercamera Gauges Speed of : Explosions—What Goes Upueans Down, by Fran- cis W. Wilson Farming Experiment, Novel, for War Veterans Fire Ladder, Turntable, Extends from Truck Flooring, New Fiber, Has Fireproof Qualities Flowers, pisoping. Give Clew to New Anesthetic.... Forest Disease Fought by Air, Land, and Water, by Francis Dickie Forest Surrounds Homes of City on Plain.... Gas Mantle Burners, Double, Give Improved Light. . Gas Range Burners Light Automatically Glass and Metal Welded by Simple Method......... Grandstand, Iowa, of Steel Assures Permanence.... Grapefruit Cutting and Coring Device... Gravel, Suction Dredge Gets from Bathing Pond.... Grinder, Automatic, for Lawnmower Blades Gulf Stream Prevents Mail from Reaching Lightship Gun, New Tear Gas, Is Effective Weapon 9 Helicopter Rises 20 Feet with New Motor. Helium, New Method of Purifying Provides Aid for “ZR-1,” by John W. Kean.......... Hens Register Eggs with New Device 8 Highway, 6,500 Mile, Last Link in, Completed, by E. M. Webber Hoe, Double Bladed Garden, Has Sharp Edges : Hotel Has Underground Parking Space for Guests, by H. S. Grassman Household Devices Hydroelectric Plant Runs without Attendants Ice Cake Machine Cuts into Standard Weights. . : Island, New, Reported Found Near French Indo China Kettles, Miniature Copper, Made from Coins Label Stickers for Amateur Radio Panels on ew Lake, Owens, Drying Up of, Reveals New Wealth.. Lamp Lock, New, Attaches to Brass Sockets q Lamp, Table, Radio and Phonograph Sets in Lazy Tongs Lift Valve Springs Easily Light, Red Finger, to Aid Night Signaling Magnet, Oil Well, Recovers Lost Equipment........ Magnet Turns Stirring Rig inside Closed Dish Mail Box Sentinel Defeats Letter Thieves Mansion, Old New Hampshire, to be Moved to New Map Surveys, Precise, by Aerial Photography. . Microscope, Pocket, for Field Work , Milk Company Uses Redeemable Metal Tokens Milking Machine Valve Prevents Infection [Continued on Page 4] The Australasian News Co. SINGLE COPY, 25 CENTS Copyright in Australia.

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[4] [Contents—Continued] Milling Machine, Automatic, for Production Work.. Money, Worn Out, Turned Back into Paper........ Monument, Southern ‘““Mammy,”’ Planned at Capita!. Mop Cabinet, Metal, for Shaking Out Dust.. Motion Picture Laboratory, Federal, Completely Equipped Motion Pictures, First ‘“‘Pullman” Car Featured in.. Motion Pictures, Paraffin as Floating I Motor, New, for Temperature Control Apparatus... Mussel Culture to Aid Pearl Button Industry Nozzle, Gas Burning, Avoids Flashback Nozzle, Water Propelled, Cleans Sewers Office Building, Concrete, Completed in Dallas Oil Filter Alarm Warns of Clogging Oil Heater Uses Separate Combustion Chamber Oil Tank Fire Quickly Put Out with Curtain of Water, by Chas. W. Geiger Oil Well Fire Shoots 200 Feet into Air Oils, Viscosity of, Electric Treatment Raises Olympic Games’ 1932 Session Awarded to Los An- geles Onion “Set” Planter Saves Tedious Labor Oxygen Breathing Apparatus Works Automatically.. Peach, New Variety of, Developed Pearl Fishing Off estern Australia Peat Digging, Hydraulic Dredging Method Applied to Peeling Machine, Portable, for Small Restaurants... Photographs, Air, Made Obliquely in Canadian Survey Phonograph with Keyboard Picks Out Records 915 925 . 918 896 867 829 900 Photography—Portraits, Novel, Made by Multiple P Exposure Pier, Large Vancouver, Henr . Copeland Pine, of Rome Leans More than Tower of Pisa Pipe Line, Water Supply Intake, Floated into Position Pistol, Army .45, may be Changed................ Prize Offers Popular Mechanics New Home, by H. H. Windsor... Pump Has High Vacuum and Pressure Combined... 8 Pump, Trench Force, Has Convenient Features..... Punch, Simple Metal, Has Self-Contained Dies Pushcart, Child’s, Carried like Brief Case Radio Headset Has Wide Resistance Range Radio Message, Mayor's, Hundreds Answer Radio News Sent to China Radio Receiving Set, Portable, Easily Installed Radio Station, Dutch, Spans 12,000 Mile Gap Radio Transmitter, Diaphragmless, Aids Broadcasting Rail Bending Device Makes Old Rails Usable Railroad Sleeping Car Headboards, Permanent, Aid Privac Railroad lation Railway, New Australian, Taps Rich Lands Rhubarb, Freezing before Forcing Improves Rice Field Waste Benefits Sugar Refining River's Menace Changed into a Utility Roadbuilding Expedition, British, Penetrates India’s Last Frontier Rubber Bands, Machine Cuts, from Old Inner Tubes Salvaging Caissons, Deep Sea, Tested Successfully on Sunken “Eagle’’ Boat Saw—Handsaw, Students’, Has Twelve Sets of Teeth Science Notes for Daily Screwdriver, Durable, Has Insulating Handle Screwdriver, Ratchet, Has Pistol Grip Seal, “Plant Trees,” as Civic Emblem Plan in Ne- braska City Seaplane Lays Efficient Smoke Screen Selenium “Eye,” Wonderful, by R. C. Folger Sewer, Leaking, Wrecks City Street Ship—French Liner Built on New Power Plan Ship “Leviathan,” Well Known Skipper to Command Ship—Ocean Liner, Wall of Water Rocks Shipwreck Victims may Walk Ocean to Safety Sleds, Ox Drawn, Thresh Egyptian Grain Snake Breeding, Commercial, mn California, by Arche M. Dunning Snakes, Hundreds of, Killed b Snow, Twin Rotary Blowers Shoot, from Highway. . Soil Pulverizer, Tractor, Digs like Gopher Sound Wave “Filter’’ may Eliminate Spindle Machine, Multiple, Aids Production Spiritism—Spirit Pictures and a Speaking Skull, by J. L. Peabody Spruce Haul, Record, Claimed in Maine Steam Boiler Signal Instrument Charts Water Level Record Steam Condensers, High Pressure Streams to Clean. Steam Flow Recorder for Small Plants Steeplechase—Over the T Down Stones, Heavy, Homemade Device Handles Street Car, English Railless, Has Six Wheels Street, Granite Concrete, Is Widest in World Street Lamps, Parisian, Have Built-In Mail B xes.. °0: Subscription, Novel, Appeals in Hawaii. . Sugar Cane Trailer Trucks Replace Oxcarts Sun’s Rays and Flask Burn Finish on Office D Surfacing Machine Uses Abrasive Belts..... Tank Capacities Measured by Portable Instrument Tape, Micrometer, Measures Diameters Tar Pouring Kettle Has Adjustable Nozzles. Telephone Lineman Uses Hanging Chair... ; Telephone. System, Italy’s, Again in Private Hands Tennis Scoring, French Have New System of Tiles, Precast, Make for Economical Building Tire Defiater Leaves Both Hands Free.... Tire Rim Remover, New, Unusually Powerfu Tool, Combination, Is Handy and Efficient ‘ Totem Post, New, Added to Harvard Museun ; Trail, Overland, Wheel Rutted Rocks Recall Days — Million of, for California’s Highways, by H. H unn Trees, Queer, of the Island Continent.... Truck Cab Top Lowered to Clear Low Bridg¢ Turnbuckle, New Expansion, Has Positive Lock Vegetable Handling Device, Mechanical... Viaduct, Concrete, Makes Altamont Pass Safe Wagon Quickly Fills and Dumps Water Heater, Tank, Uses No Coiled Tubes Water Service Box Has Safety Features.. Welding Outfit, Portable, Generates Own Gas Winch Designed to Attach to Front of Tracto: Window Sashes, Adjustable, for Any Weathe: Wire Strap Tying achine by ~~ Se deapates Steel Reinforced, Appears in Eng- lan Wrench Combination Tool Has Strong Grip... Writing Pad, One Sheet, Lasts “‘Indefinitely Yacht Club Float, Launched in Chicago.... Yacht, Latest, Added to New York Yacht Club F SHOP NOTES Automobile Cylinder Blocks, Tool Holds for Preheat ing Automobile Runways, Concret Bechive, “Sun Porch” for...... Blueprints, Rack for Drying........... Bolts and Screws; Tight, Removing Cable Ends, Method of Handling Coal Dealer Window Display Couplings, Gasoline Line, Cementing.... Explosives, Method of Tamping Fence Post Attachment Made of Pipe.. Plux for Brazing Gas Torch, Homemade Gauge, Height, Made from Planer Gauge Gauge, Internal Limit Gold, Green, Platin Hoist, Serviceable omemade baal Hose Connections, Tight, How to Make.. Hospital, Sleeping Porches for.......... Locomotive Brasses, Extractor for... Milling Cutters, Setting to Depth... : Milling Machines, Oil Distributor for. . Planer, Wood, Safety Guard for.... Post Holes, Shield for oe Pump Cylinders, Method of Pulling a, Guide and Die f 7 loor, New Method of Lowering adius Finding Tool Scriber Set in Fountain Pen Sewer, Flushing by Water Pressure.... Steam Engine, Small Horizontal, How to Mal “Steamboat,”” Improved, for Tracing Steps, Concrete, Protecting Edges of Tool Chest Drawers, Slide for Trammel, Improvised ... Troughs, Wall, for Poult Truck Attachment for Handling Armatures.. Valves, Globe, Reseating Willows, Removing from Open Drain... Workbench Drawer, Trick Lock for o* Workbench Top, Container Holders in... Wrench, Spanner, How to Make AMATEUR MECHANICS Automobile Hood, Method of Holding Automobile Radius Rods, Shock Absorbing... Baby Swing, Adjustable Hanger for Barrel, Tumbling, Provides Sport for Bathers. [Contents Continued on Page 6] K.., ‘

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POPULAR MECHANICS ADVERTISING SECTION DRAKE'S PRACTICAL MECHANICAL BOOKS THEY WILL RAISE YOUR PAY— ORDER ON 5-DAY TRIAL ‘ks listed below will perfect you in your chosen trade — pave the way to the big positions. . in non-technical language—easy to read and understand. Every book covers its subject ssmopletelts An entire course of instruction condensed into one volume. Your choice sent postpaid — you benefit 5 days — money refunded in fullif not entirely satisfactory. Order direct from this page. (BROOKES a ' MOBI Fr \ \ Hann BooK Automobile Books bile Ignition, by Manly .. Leatherette $8.00 le ~ wom and Light- h ‘ .Leatherette $2.00 Automobile Handbook. icceeuaonaee Leatherette $2.00 Motor Car, Truck and actor, by Manly oth $1.50 tarting and Lighting Troubles, medies and Repairs, by ; eathasette $3.00 utomebile Battery, Care and epair, by Manly.Leatherette $8.00 u bile Catechism and Re- pai ~ Brg peeens I seen $1.50 - nd Vulcanizing, ws ae - rd oth $2.00 Ae and Oll Engine Hlaudvoox, . oth $1.50 Automot Re Upkeep and Car by Manl Cc loth $1.50 Motorcycle ’ tiandbook, ~~ eo! Cloth $1,50 Shop Practice Books Sheet Metal Workers’ Manual. Leatherette $2.00 Oxy- At etylene Welding and Cut- t Cloth $1.25 6) le Ri ile and Logarithmic Ta- bie 1atiamnaed Leatherette $200 ok for Mibweights. Cloth $2.00 l Blacksmithing....Cloth $1.25 Machine Shop Practice. ..Cloth $2.00

Mechanical Drawing and a chine Design Cloth $2.00 Pattern Making Cloth $1.50 Carpentry Books Cloth Binding Modern Carpentry, 2 vols The Steel Square, 2 vo Wooden Boat and shipbuilding. Modern Estimator Timber Framing Builder’s Architectural Drawing. Concretes Practical Bungalows Low Cost Homes Roof Framing, by Van Gasbeek. $1. 50 — Building and Hand Rail- Electrical Books Practical Applied Electricity.. > 4 Alternating Current Electric Motor Control Systems. 31. 50 Wiring Diagrams and Descrip- tions o-38 1.50 Asmatent ne Magnet Winding. $1.50 Modern Electrical Construction. .$1.50 Modern Electric Illumination. ..$1.50 Electricians’ Operating and Test- ing Motion Picture Operation Drake’s Electrical Dictionary... Electric Motors, D. & A Electrical Measurements and Me- ter Testing Drake’s Telephone Hand Ok... Easy Experiments 0 Wireless Telegraph phone Handbook Telegraphy Self-Taught.. ‘Cloth $1. 25 Steam Engineering Swingle’s Handbook for Steam Engineers and Electricians. . Leatherette $4.00 Examination Questions and An- sewers for Marine and Station- ary Engineers....Leatherette $2.00 Steam Boilers Leatherette $2.00 Swingle’s Catechism of Steam, Gas and Electrical Engineer- Leatherette $1.50 ORDER DIREGT FROM THIS PAGE—ON OUR MONEY-BACK. PLAN ks listed above are only a few of the many in which you will receive promptly after ng out and mailing us the attached coupon. The t gue, action order direct from this PUBLISHERS 1008 Michigan Ave., Chicago Drake Books Are For Sale at All Book Stores Mail Coupon For Free Catalosue Your Guide to Home Study page—cross name of ’ < wanted and send in with price quoted. y postage and send the books on our money-back FREDERICK J. DRAKE & CO. For w i : Chicago, Tl. llustrated Practical M My name is and my address

d me fre EN:— Please senc GENTLEM catalogue echanical Painting Books Scene Painting and Duilotin, Ase 4.00 A Show at Sho’ Cards -00 Sign Painting 4.00 Strong’s Book of Designs Leatherette §4.00 Styens' s Art of Show Card Writ- eT 06060060600006000 ..-Cloth $4.00 Siguist’s Alphabets ee $1.50 Modern Painter's cee la 2.00 1,50 $1.50 1.50 Automobile Painting. Estimates, Costs and Profits, Painting and Decorating.Cloth New Hardwood Finishing.Cloth The Amateur Artist 1.50 New Stencils Cloth $1.25 Chalk Talk and Crayon Pre- sentation ..... sueneeqes Cloth $1.25 Farm Books Farm Mechanics..... ++++-Cloth $1.25 Farm Buildings -Cloth $1.25 Farm Engines d Traction Farming........Cloth $1.50 Business and Reference Books Better Business Letters Better Business English pieedesstababreshues +++Cloth $1,00 Better Advertising Cloth $1.00 Finger Prints Simplified. .Cloth eH Practical Bricklaying 1.25 Practical Instruction for Detec- tives -.-Cloth $1.00 Practical Plumbing Cloth $1.50 Hot Water Heating 1.50 Elementary Chemistry....Cloth $1.50 Courses in Civil Service...Cloth $1.50 Cyclopedia of Recipes....Cloth $1.50 American Star Speaker...Cloth $1.50 Modern Languages By Prof. P. 8. Allen, U. of Chicago French without a Teacher.Cloth $1.25 Spanish without a Teacher.Cloth $1.25 German without a Teacher.Cloth $1.25 Everyday French Everyday Spanish mas — _ —— = = ~— [ FREDERICK J. DRAKE & co. 008 Michig2® Avenue tage paid, your d + Rescribes over 1 which lists an Study. Booke for Home

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Read what these Oliver agents say: $660 a “Have averaged 9660 profit a month for last six months.” Rassell, Conn. $1000 in 4 weeks “Am making 61000 per month. I have made big money before, but did not expect so mach, Your Burner is just the thing.” J Carnegey, 8. Dak. Buys car with profit “Have earned enough in one month to buy mea new auto.” 8. W. Knappen, Col. Sells like beer in a dry “am sending today forseven Olivers. This is one day's orders ($85 profit) Sellinglike beer in a dry town.” H, Drew, Mich. $43 in one evening I made 63 last night. N. B. Chelan, Wash.

POPULAR MECHANICS ADVERTISING SECTION Iimade $ 215 to-day” -writes Bentley The Oliver Oil-Gas Burner does away with coal and wood. Burns 95% air—5% oil. Turnsany range into an oil-gas stove. Just like using city gas. Gives much or little heat by simply turning valve. Think of the appeal you can make in every community. Heat only when wanted—that means doing away with sweltering kitchens in summer. Cheaper than coal or wood — absolutely safe. No fires to make, no ashes, dirt, smoke, chopping, carrying coal and wood. Easy to install. Doesn't change stove. Easy to demonstrate—slips in or out of stove in one minute. Show any woman how to have a cool kitchen and sale is made. Big demand all year. Make you more money this summer than ever before. The big season is on. Free Sample Case Offer and book “New Kind of Heat” Write for them now. OLIVER OIL-GAS BURNER CO. Oldest, largest Manufacturerg Oil-Gas Burners in the world, 2014-R Oliver Building, ST. LOUIS, MO.

ELECTRICITY Send for catalog which tells how Burgess Home Training enables men and boys to get good jobs and keep them. LEARN AT HOME BURGESS ELECTRICAL SCHOOL, Dept. P6, 744 E. 42nd Street, CHICAGO |

THE AUTOMOBILE P PAINTERS’ MANUAL By 0. P. WULF, A. ¥.P.E., Founder of The Detroit Auto Painting Schoo! For the auto painter, garageman and auto owner. Written to = precise information, pertaining to the Painting, Striping, Mono- Taming and Lettering of an automobile. Covers the subject of eolor mixing—color blending—and tinting with a hundred and fifty different shades. Considered by experts, the book of the hour. Self instructional and self educational. Also contains numerous and various styles of alphabets, ~ i ms ane ase” Special introductory offer. Edition limited DETROIT AUTO PAINTING SCHOOL, 426 Scosier fies, Da °. DETROIT, MICH. ost Paid 5e.

===yore=-EARN TELEGRAPH Y?= jon MORSE AND WIRELES “TEACH YOURSELF: moemsaaes, at any speed, just as an expert operator would. a oe —— HOME a [(Contents—Continued from Page 4] Berries, Shipping by Mail Boat Trailer for Auto Buffet Doors, Novel Sliding Canoe, Method of Towing. . Clothes ._~ g Rack, Simple.... Cupboard tepladder. Convenient’ Door Latch, Self-Acting.. Dust Container Made from. Bag Fence, Recess in, for Auto.. Fish Lure, Glass Bowl Containing Minnow Fly Trap for Dairy Barns Fountain Pen, Method of Repairing Gasoline Tank Cap, Retainer for Gun, “Safety First,’”” Shoots Rubber Bands Heater, Kerosene, Converted to Use Gas Heater, Kerosene, Heating Water with Hose Spraying Attachment for Garden Lawn Canopy, Improved, How to Make Lawn, Edging with a Blowtorch. Onions, Transplanted, Grow to Double Size Percolator Faucet, Improv Photography—Lamp Shade for Dark Room Poultry Nest Prevents Roosting on Its Edgx Radio Detector and Two Step aes for D Tubes Rugs, Old, Method of Renewing Saws, Rusty Crosscut, Cleaning — » pomanant and Information Burea Spool Holder for Sewing Room Statoscope, Homemade .. Stones, New Method of Piling, on ‘Cleared La Storage Battery Acid, Preventing oe from Stumps, Burning Out Effectively..... Trousers Made to Fit in High Boots Water Filter and Cooler, Si Weed Pulling Fork for H Window Sash Weights, Improvised

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** THERE'S MONEY INIT” i \ oe — — —_— — = _ > — HOME-—— eee eet aoe — — —_ in haif usual time, at ‘At trifling cost cost, “with the wi wonde ful Automa mitter, THE OMNIGRAPH. Sends unlimited Morse or ( Adopted by U. S. Government, and leading ‘cat Catatow free. Ol OMNIGRAPH MFG. CO., 16-22 Hudson St., NEW YORK mn Radio Phone Set—and don’t know the onte~sent are missing most of the fun ——e

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seeae FRANKLIN INSTITUTE, Dept. $177, Rech: Sirs: Send me without charge, (1) Specimen I AY iat Clerk Examination questions; (2) List of Gov« ent) obtainabie; (3) Tell me how I can get a Gov't p <

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POPULAR MECHANICS ADVERTISING SECTION 4] Blet These Guides ~J FF $i 2 by 4 Hawnnss) Hawxiss; Hawainy Hawxins, Hawkins) HAWKINS. HAWNINS) Hawains — agyan ( \ f nee scars . wee ae ’ \ | yi Elec ; Eikcrmical| = ELecrRtcel TRICALY «ELECTRIC ss — a a ee ae ‘ ' ie s bb ¢ 7 ——] 4 3 - LV : V5) NO | ‘ VI Q- | T ; t par’ Ap a i. Open 52600 \ seen pen, ¢€ HAWKINS ELECTRICAL GUIDES (so.mes 3500 PAGES $1 A VOLUME a | : 4700 PICTURES 31 A MONTH Send No Money--Send Only This Coupon Know the facts in Electricity. They mean more money and better pading ition for you. Hawkins Guides tell you all you need to know about + THEO. AUDEL & CO., lectricit Every important electrical subject covered so you can 72 Fifth Ave., New York City ‘ORK understand it. Easy to study and apply. A complete, practical 1 Working course, in 10 volumes. B ; = covers Please submit me for free examination, HAWKINS ELEC- Order a set today to look over. Ocien a50 pocket cine; Rentals covers. | TRICAL GUIDE, (Price $1 a number Ship at once prepaid) the 10 numbers. If satisfactory, I agree to send you $1 within LEARN ALL ABOUT ! seven days and to further mail you $1 each month until paid, Magnetism—Induction—Experiments—D ynamos—Electric Machin- | id — Motors — Armatures — Armature Windings — Installing of am s—Electrical Instrument Testing—Practical Management of | Name.............. yhamos and Motors—Distribution Systems—Wiring—Wiring Dia- — ~Sign Flashers—Storage Batteries—Principles of Alternating | { nts and Alternators—Alternating Current Motors—Trans- ormers—Converters—Rectifiers— Alternating Current Systems—Cir- | cult = Bre 1kers—Measuring _Instruments—Switchboards— Wiring Occupation a asesee® Fever Stations—Installing—Telephone—Telegraph— W ireless— Bells ter, NL of ‘ight 2—Railways. Also many Modern Practical Applications , Employed by. > Mal of Electricity and Ready Reference Index of the ten numbers. et & cent to pay until you see the books. No obligation to buy unless iby are satisfied. Send Coupon now—today—and get this great help t rary and see if it is not worth $100 to you—you pay $1.00 a month of ten months or return it. ent jobs 1 I g Home Adérem........ ee 5000 0060 6000000000 ! Reference ..... 9206 066 se 0ee 60006 tee seeessee

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POPULAR MECHANICS ADVERTISING SECTION 380 Drafting Course Fr ee There is such an urgent demand for practical, trained Draftsmen that Iam making this special offer in order to enable deserving, ambitious and bright men to get into this line of work. I will teach you to become a Draftsman and Designer, until you are drawing a salary of $250.00 a month. You need not pay me for my personal instruction or for the complete set of instruments. $250 a sou, 3 agreement and guarantee. Drafts- on men’s work is _. pleasant and rofitable. Positions are open paying ,600.00 a year in the best surroundings. They are open everywhere. Thousands of men are needed who have just the kind of training I will give you. You can get this training during spare time in your own home. Mail the Coupon for my valuable book —“Succesful Draftsmanship.” It explains how YOU can be- come a Successful Draftsman in a short time. The book is free at present, so write AT ONCE. (ESE YET Ed CC atees = soeat pestis ts) Free Course Offer Coupon Chief Draftsman Dobe 1951 Lawrence Ave. Div. A-135 Chicage Without any obligation to me please mail your book, “Successful Drafts- manship”’ and full particulars of your liberal “Personal Instruction” offer to a few students. It is understood I am obligated in no way whatever, Name___ Address Chief Draftsman | Will Train You Personally | on practical Drafting- room work Until you are competent and Until you are in a permanent _posi- tion at a salary paying at least $250 per month. This is an exceptional opportunity for a few selected ambitious men, be- tween the ages of 16 and 50 whom I will train personally. SendtheCoupon or aletter and let me tell you how you can be- come a Draftsman in your spare time and earn a good salary. Don’t delay — send the coupon at once. REE-this*25~ Draftsman’s Working Outfit These are regular working aa instruments, the kind I use my- self. I give them free to you if you enroll at once. Send the Free Coupon today. Earn While Learning You can be earning a handsome i: come while learning at home. This 184 s| offer Iam making. Absolutely no obligati any kind in sending coupon. But you must at once, as I limit the number of my stu: Mail the FREE Coupon * book— ‘‘Saccessfal Draftemanship, ’’ also list 0! positions and for the free offer to be earning good mor once while learning at home. This offer is limited and in to benefit thereby — act at once. Chief Draftsman Dobe 1951 Lawrence Ave., Div. A-135, Chicago, Ill. I Guarantee To instruct you until

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POPULAR MECHANICS ADVERTISING SECTION How to Box 40 oe Terry Bae vg Cc James J. poet, J. Gardner Govtth M. D., Arthur P. Keeley and Gus. E Keeley. How to Box to Win, How to Build Muscle; How to Punch the Bag and How to Stand, om or —" ot o is interesting book written by experts is know n also as ** The Book of Health and Strength.’’ It will greatly assist everyone in keeping fit, in putting them in condition to master a stremuow undertaking either physical or mental. 62illustra tions. Size 444274 in. Paper copy 135 pages SHREWESBURY PUBLISHING CO. 5525 West Lake Street, Chicago. in. PRACTI CAL ELECTRICAL EDUCATION ¢ ——— h approved scientific methods which en ye f specializing — us to give you. nc. ‘and D. c. Armature Wind! ing, W' —— Testing. Practical Electricity, Drafting, Elec- trotechnics, Commercial cal Engineering with B. S. . “are While You Learn.” Radio Broadcasting WIAO. Every Da Next term opens June 25th. Write for 72 I atalog Mention Age, Educa an d Course interested in. SCHOOL OF ENGINEERING of MILWAUKEE ~ PM-6, Marshall Street, Milwaukee, Wis. FREE BOOK LEARN PIANO This Interesting Free Book shows how you can become a skilled player of piano or organ at quarter usual cost. It shows why one lesson with an expert is worth a dozen other lessons. Dr. Quinn's famous Written Method includes all of the many important modern improvements in Brings right te your home the great advantages tory study. Forthe beginner or experienced players. tists. Successful graduates everywhere. Scientific yet easy to under- ted. AN music free. Diploma granted. Write today for free hook. Conservatory, Studio PMG6, S96 Columbia Read, SGeston 25, Mass. Make $10 a Night Bea Drummer FP'ofesional drummers in demand everywhere and make big money. You can quickly and easily learn to play band, orchestra and dance music through my home study course. Write for particulars | Today, NOW! Write for folder of special snare drum offer TheHerman H. Rinne Correspondence Schoo! of Modern Dreemie 3154 Perk Ave APous $200 A MONT » business in New York. After 8 Weeks in New York One graduate writes, “ after bweeh ir school, I took a ob that paid me $60.00 a week.”’ You too. Here you get personal instruction that enables r i ida big paying poution. Day and evening classes. ay our beautifully iNustrated New Y Free Automobile Book * it shows views ~ Meme obile br s, ite future anc ucan qualify fos obs New York ree atalogs Se nc 4 be or it today STEWART AUTOMOBILE SCHOOL 225 W. S7th St. Dept. A117 NEW YORK COLUMBIA SCHOOL OF DRAFTING pecializing in training of professional Draftsmen— lechanical, Architectural and others: personal in- ruction; complete course 3 to 9 months. For infor- ion address Local Dent. 2003, R C. Claflin, Pres, lith and T Sts.. N. W.. Wash... D.C RADIO FOR THE AMATEUR _ Installing and Operating Stations for Radio cation are presented in convenient form in Pca Amateur Wireless Stations ence book containing the best suggestions of three experimenters compiled by the editor of 5 roth es a clear-cut trail to the practical achievement of an amateur wireless station. Where a method is described, it is one which the author of the chapter has worked out and tried himself; and the same is true whether dealing with a single piece of apparatus or a complete station. 136 P. 115 ttustrations Size 6x8, Price 75c postpaid Popular Mechanics Book Dept. 200 E. Ontario St. Chicago Bea RADIO EXPERT Radio is be- coming the world’s most popu- lar source of entertain- ment! Radio experts now needed every- where to construct, install, repair and sell radio outfits. Big money for trained men! Learn in Spare Time The Radio Training Association of America will train you easily and quickly. Association operated by many of America’s most prominent radio leaders. FREE—employment service to all members! EARN $50 TO $350 A WEEK Millions of dollars being spent in Radio. Become a radio expert and make from $50 to over $350 a week—in spare time or full time. No need to leave town or to give up present work. Send for Free Information You too can make big money in radio. Write today for facts on how you can become a Radio Expert in a few weeks and at extremely low cost, and become a life member of this association with full privileges. Mail postcard or letter today. Address Radio Training Association of America E Washington, D. C. Radio Needs Trained Men MEN AND WOMEN TO Ww A N T E LEARN PHOTOGRAPHY! Photographers and Photo-Engravers earn $200 to $500 a month. The field is uncrowded. Learn these profitable and fascinating professions. Taught by largest and best college of its kind in the world. Established over 30 years. ates far exceeds supply. Good positions Demand for our gradu: secured. Tuition and living expenses low. Get this FREE Book! “ctcccttentss book describing wonderful opportunities in this field. | [linois College of Photography, Box 463, Effingham, Ill. THE PRACTICAL Automobile, Wagon, House «4 Sign Painter By W. F. White Postpaid $1.00 This book is written for the wishes to paint his automobile, or his home, or wagon It will tell the in experienced just how to do it, and it will tell him how to mix paints It also contains many painters’ recipes and trade secrets of great value. Bound in Cloth—157 pages—Size 5 x 7! Postpaid $1.00 SHREWESBURY PUBLISHING COMPANY 5525 West Lake Street Chicago, Illinois man who

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10 I will start with No. 1. POPULAR MECHANICS ADVERTISING SECTION Five Pictures Show You How to Be a Mechanic! TUDY the pictures in the order they appear. These pictures tell:the story of how a young man—yjust like YOU—succeeded in life. Here you will see the man who doesn’t spend all his time reading the sporting news; he is serious and ambitious. He answers the advertisement promptly derful possibilities. He is looking to the future. . He is not going to stay ina rut all his life. He wants monéy, respect, and a real posi- tion in life. This man, just like you are doing now, is reading one of my advertisements. I write and sign all my own advertise- ments, just as I meet face to face the men who come to my school— The Million Dollar Sweeney Trade School. Now look at No. 2. This Bud- die decided to investigate the auto-motive business. He wanted to see if it did not offer him won- He believed the trained man could succeed; he was curious and eager to know more about the amazing Sweeney System, so he answered the advertisement. He just sent me his name and the day I got his letter, I sent him the big 64-page Sweeney catalog. You see him now reading the Sweeney cata- log. This is the most important step of all— the first step—to get the catalog. This man is reading how 60,000 men made good, how they learned to be expert mechanics. He is reading how Wilson and Powell left the Sweeney School and now “wouldn't take $10,000 for our business, and we owe it to ” you. How Elbert Pence built up a $25,000 yearly garage business at Clearmont, Mis- souri; how men are trained in eight weeks to be competent repairmen, auto and tractor experts, mechanics, garage owners, salesmen, etc.; how the wonderful Sweeney System as applied with the immense resources of this Million Dollar School Reading the fasci- nating Sweeney calalog teaches them by training hand and eye and brain; how everything is here not only to teach them, but to make them comfortable, dormi- tories, swimming pools, free lock- ers, reading rooms, one of the finest equipped trade schools in the world. Now I want you to get the catalog and see the actual pictures of men at work in the school. Number 3 shows this man at work in the Sweeney School, tak- EMORY J. SWEENEY, President 1190 Sweeney Bidg., Kansas City, Mo. Send me free your 64-page catalog and Special Summer Offer! Name... I pay your Railway Fare from any Address point in the U.S. to Kansas I'm Coming. City ing the eight weeks’ course. Please note he is work. ing in overalls, with his hands; he is not reading a book; he is happy and contented because he is learn. ing rapidly. He knows he will soon be a real trained man. bees. school; he likes the expert instruc- tors who show him how to do things that he couldn’t learn in years tinkering around a shop or garage. Now I call your attention to pic- ture Number 4. This young man has completed his course and de- cided to go to work right away. He took a job as a repairman at $1.25 per hour. There are plenty of better jobs open. The demand for trained men is way in excess of the supply. Sweeney graduates are eligible to positions as motor experts, $125.00 a month; chauffeurs, He is one of over 1,000 men working like He likes the men around him; he likes the At work in the Sweenev School $150.00 a v month; trouble shooters, $3.00 per hour; tractor engineers, $15.00 a day; demonstrators, $150.00 a month; salesmen, $3,500.00 a year; garage managers, $3,000.00 a year. Some men go back home and open Own repair business; some go to wor big garages; some have a variety of plans, but all practical, and I’m glad to talk over and advise with my students, if they are doubt. command the good jobs.” Please look at Picture But don’t forget this: ““Trained Number 5 shows my student in business for hir He has opened his own shop and garag He has a business that will fix him for | He is on mighty good terms with the ba the president of the local commercial all the successful men in his town. Now, my friend, apply this to your own case. Make step for step like the man whose progress | hav illustrated. But the first thing you want to do is to send for my catalog now. Investigate what Sweeney has actually done, my positive record of success. It costs you nothing to get this valuable free book. I am making a special summer offer that will save you a lot of money and I will also pay your fare to K. C. Write me today and learn something greatly to your advantage. Do it now. Earnestly yours, Success attained. Owns | bus EMORY J. SWEENEY LEARN A TRADE AUTOMOTIVE & ELECTRICAL 1190 SWEENEY BLDG KANSAS CITY, MO.

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Ww } work. ding s learr raine a ) l- d ig like .eS th plan lk Ove are ttained. sown e ’ r if POPULAR MECHANICS ADVERTISING SECTION What the Old Timer ye STEVENS, ¢ a i S| SUPER NTENOENT | " ’ 66 NLY a few years ago, Charley, the man whose name you see on that door was just where you are today. “I remember the day he came to work for us. He didn't know much about the business. But he was always asking questions—always anxious to learn. “And by and by we got to noticing that Billy Stevens was getting ahead of some of us old fellows who had been around here for years. “I can remember as clearly as though it were yesterday, the day Billy showed old Tom Harvey how to figure out the pitch of some new bevel gears we were making on an important contract. “Tom told me afterward how respectful Billy was—nothing fresh, or ‘I know it all’ about him. He just made a suggestion and showed Tom a quicker way to start the problem and a shorter, surer way to finish it. “One day I said to him—‘Where’d you get hep to all that fancy figuring, Bill?’ We were eating lunch and he was reading some little book he al- ways carried. He looked up at me and said in- nocently: ‘Oh, I just picked it up!’ I knew different than that, so I quizzed him until he told me the whole story. ) you ever notice the old men around the shop,’ he asked—‘the men with families who drudge along day in and day out—never getting any- re c? I admitted that I had noticed quite a lot or them, “ _ Well, he said ‘I made up my mind I wasn’t go- ing to spend my whole life in-a humdrum job at sma'! wages. So I took a home-study course with the International Correspondence Schools that would give me special training for this business. “Tl tell you frankly that I never dreamed it would So fascinating and so helpful in my work. I’m making mighty good money—twice as much as formerly—and I’m going to have even a bigger job around here some day.’ said.to Charley “Well, Charley, that boy went straight on up. The members of the firm heard about his studying in his spare time and encouraged him to keep on. You see where he is today. “And I—I’m still plugging along at the same old job—struggling to make both ends meet. I had just as good a chance as Billy Stevens, but I let it slip by. Yes, I let it slip by “Now, Charley, you’ve got to want your training bad enough to go get it. That's as far as I can help you; you've got to do the rest yourself. “I’ve seen a lot of young men come into this busi- ness. Those who went ahead were always those who trained themselves for the job ahead. You can do the same thing. “Start now! It will take only a moment to sign and mail that coupon. It doesn’t obligate you in any way. But it’s the most important thing you can do today. Some day I know that you will come to me and thank me for what I’m telling you.” —_— — — — — — TEAR OUT HERE — — — — — INTERNATIONAL CORRESPONDENCE SCHOOLS Bex 5523-D, Scranton, Penna, Without cost or obligation, please tell me how I can qualify for the position or in the subject before which I have marked an X BUSINESS TRAINING COURSES Business Management iemane Industrial Management Advertising Organization | }Better Letters Foreign Trade Stenography and Typing Business English Civil Service Railway Mail Clerk Common School Subjeets High School Bubjects D French Illustrating Cj Carteoning TECHNICAL AND INDUSTRIAL COURSES 8 (Banking and Banking Law Accountancy (including C.P.A.) Nichelson Cost Accounting Electrical Engineering Electric Lighting Mechanical Engineer Mechanica! Draftsman Machine Shop Practice Railroad Positions Gas Engine Operating Civil Engineer eying and Mapping ing OC Airplane Engines Architect Blue Print Reading Sontractor and Builder Architectural Draftsman Concrete Builder Structural Engineer Plumbing and Heating Chemistry () Pharmacy Automobile Work Navigation Agriculture and Poultry Mathe matics ——_ Occupation Persone residing in Canada should send ‘thie coupon te the Interna- tionel Correspondence Schools Canadian, Limited, Montreal, Canade.

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POPULAR MECHANICS i" soi AOA almost rather be the Draftsman than the Boss! | Just Like a Movie— ‘“‘From Rags to Riches” By the Magic of the Coyne ‘Job-Method” Drafting Course Ori a few months ago an underpaid laborer—or worse, out of ADVERTISING SECTION a job. Today, a high-priced Draftsman, confident, successful, facing the future without fear. Look at the picture! You'd YOU—no matter what your job today, no matter how limited your schooling—can RE-MAKE yourself by learning Drafting the new way—President Cooke’s “Job-Method.” , An every-day occurrence—no magic after all! Jobs Open $300 a Month Every factory, big or little—every railroad, every automotive plant, shipyards, the U.S., State, County, Bennett Wellington Cooke 2nd City governments, the Army and Nav y, everywhere you President of the Coyne Trade and Engineer- ng School, ‘greatest Institution of its kind fn the World.” Mr. Cooke has an interna- tional reputation for turning out big-job big-pay Draftsmen. Draftsmen’s Pocket Rule FREE! averting pocket Fi rule free to ev ery who's ir ested in Draftin: Cor ape brings i * DON’T WAI END TODAY ome ate ene orm: me oem eter me Coyne Trade and Engineering School B. W. Cooke, President Home Study Dept. 302 4} SS2 to 598 So. Throop Street Chicago Without obligating me in re Pook please send me Draftsmen’s Pock- | et Rule, and your 2 books, **Draft- » foundation .of Industry’ and earn Draftin the Job-Meth- ‘ od” —all absolute 1 ree. Also com- i plete information of your rapi ho me-study Drafting course, free J Radio offer and free Instruments. turn Draftsmen are in demand at $200 to $500 a month. Before machines, buildings, any- thing can be built a Draftsman must draw the plans! Mechanics, Builders Men in any mechanical line can smash ahead to bigger pay and better jobs when they, can not only read blue-prints but create them! “Loan me a part of your spare time’’—says President Cooke, ‘and by my new ‘Job-Method’ rl make you an } Expert Draftsman quick!” The “ Job-Method” gives you actual JOBS to do from the very first ‘lesson.”” The “Job-Method” makes hard jobs easy and pleasant. | Mail Coupon for FREE Two Books The new “Job-Method” course of Drafting trains you for the big-pay job. Most complete Drafting instruction ever offered for home-study. To supply the enormous demand l for Cooke-trained Draftamen, the great Coyne School now offers special inducements to ambitious men ——— Coupon brings 2 free books, free draftsmen’s pocket ] and complete infor Mail it today! I £XrATRT (Ci-l1-aaa 1 A ) = kJ Lin i B, W. Cooke, Se ® ¥ Address Home Study Dept. 302 e 552-598 So. Throop St. CHICAGO mitted by experts tion, installatio absolutely opportunity remai RadioCourse Radiocouse FREE The famous *‘COYNE course in Radio, s¢ to be the most Spree “tice! and up-to-date eve oF pee »duced. Inc! netruc operation. ‘Act ally teaches you to build our own set. This $45 course act oo. while this ins open. FREE Draftemen’ + Profes sional’ truments an¢ complete t Supphed without « t of cost a ba orery Method ipon brings deta yf this great ce offer.

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Ss?) ut of ssful, fou'd atter —can ident *r all! POPULAR MECHANICS ADVERTISING SECTION MEN-I Will Make You AUTOMOTIVE ELECTRICIANS “I Teach You a New Easy Way | is it necessary for you ears studying electricity a college graduate to pay job. I have discov- perfected an amazingly by which any one can Automotive Electrician weeks. Ambu graduates ng down the best jobs in y—stepping right out of | into $75 a week jobs antee to teach you in 8 eks here in Chicago—-or yur own home in spare is is no idje talk. I can ry word I say I will the name and addres: of ites—they will tell you re making And you e to worry about getting My employment depart- zive you Fiee Service. it once, or mail the cou- i might as well have one and be an Auto- trical Expert and get hat is waiting for you.” - BUCK WALTER, President Wonderful New Field Pays *75 to 5100 a Week After Few Weeks Training If you want big money, here’s your chance. Don’t study for 1 and months learning some business that may not pay you as you want to earn. Here is a wonderful new field—Automoti. tricity—the highest paying branch of both the Electrical Field and the Automotive Industry, and there are not enough men by half to fill the thousands of jobs that are waiting obs that pav $75 to $150 a week. Just think of it! 78°, of all auotmobile repairs are electrical Yet, not one out of 50 garage men know enough about electricity to cash in on this field No matter what you now know about automobiles, this is your big chance For, by an amaz- ingly new, easy method which I have discovered I will make you an automotive electrician in a few weeks of interesting study and equip you to take any of the b ay jobs you want Thousands of Men Wanted pee branches of y»wded are Ord iuto- nobile mechanics cannot find jobs. But the demand for men who know a toe i lectricity is so tremer lous that the men I train are shnappe j the finish my new, easy method of learning NO EXPERIENCE NEEDED You don’t have to be experie de ha mobiles or electricity You don't even have to ha f * ati matter what you are doing now, matter what your re, ed t r I will fit you in a few wee tol model of car and have looking for the troubl a ‘'S they BIG FREE BOOK (|) / us. 0k about Automotive Electricity has started hundreds : tA 'y institute he road . Dept. 16 to success and big pay in this amazing new field : » Chicago earns $100 a week William Baas, of Louisiar A / 2632 Prairie Avenue salary in two weeks. Ellerd makes $1000 clear profit every en PI ae »w increased his income four times. Every one of these m« ITOMOTIVE me sending for this book. This is your opportunity. Send for AUTO TIVE 5 , mediately. Don't delay your success a minute ELECTRICITY Jobs Wait all about this amazi ll details. Cc. J. BUCK WALTER, President Elk . the 1 | NAB iw t ae ere terested i new, easy way of becoming an Auto- 4 a trician. See for yourself what a tremendous future. is ahead 4 e what my other graduates are doing. See how you can quickly se big pay jobs with a real man’s salary. A special limited now being made—so mail the coupon at once for the Free Home Study Cou }] Residence Course 4 4 Name . Ambu Engineering Institute a Dept. 16, 2632 Prairie Ave. CHICAGO, ILLINOIS / .

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Tike x= AGENTS WANTED 7 Cele le a -Ne: rl Show You How to Make More Money Taking Orders for Mellinger Tires Without risking one cent, I'll start you as I have started so many others in a business of your own. All or part time. The Mellinger Plan is revolutionizing the tire business. No capital or experience needed. I Guarantee Your Profits The Mellinger Plan literally guarantees your profits. My Big Free Book tells you all about it. No matter what you are doing, where you’ live, let me put this remarkable money making ,plan’ in your hands. 12,000 MILES GUARANTEED! Lowest Wholesale Prices in America! Mellinger Super Quality Cord Tires, al- ways considered the best cord tires made, are now even better. The use of Ethyl- cured Rubber gives marvelous tough tread, wears down so slowly it reminds you of steel, yet so pliable that it feels like pure gum. Bead reinforced with two chafing strips; combed Egyptian cord; a douple layer of cushion rubber; cured 24% hours onair bags. These high

cost more, yet you pay less than for ordinary unguaranteed tires and | give a Guarantee Bond for,12,000 miles. time in showing and recommendin Mellinger Tires, prising offer that will give you a set of tires FRE". If you are in dead earnest I will send you the Master Salesman Agent says, ‘‘It’e tike taking a prospect through the Factory. The Kit sells the prospect and I take the Order.” Be the first from your locality to get the Mellinger Plan and positive proof that bay can make big money. I say it’s your grade features on the Mellinger Cord For a little of your e oe will make you asur- Kit, containing everything. As one PositiveProof for You ig opportunity—a big business—hosts

of friends and customers—I don’t ask you to risk one cent. Send the coupon today. My Big Free Book explaining every- thing will be in your hands in a few days, Mellinger Tire & Rubber Co. 1704 Grand Ave. a 7 City, 2

Mr. B. L. Mellinger, Pres., Mellinger Tire & Rubber Co., 1704 Grand Ave., Kansas City, Mo. Without obligation, send me details of the Mellinger Plan, Free Book and Wholesale Prices and how, without investing any money; I can become your authorized agent,

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SAXOPHONE - 25¢ ACCORDEON - 25c¢ 25¢ 25¢ The above prices are postpaid, Any above 5 titles, $1.00, postpaid J.C. DORN, 725 So. Dearborn St., Dept. 17, Chicago BANJO GUITAR

POPULAR MECHANICS ADVERTISING SECTION INSTRUCTION BOOks, MUSIC These books are illustrated and gotten up to make the method of self. teaching so simple that any one with. out any knowledge of music could learn to play any of the following MANDOLIN ~ 25¢ PIANO ~ 2% UKULELE = 2x VIOLIN <= 25¢

ow IVECHANICS We have more positions available than grad- uates to fill them. Address Dept. 328 AMERICAN MOTOR SCHOOLS, Inc., Washington, D.C, Write today for catalog,

LEARN TO PITC Lessons by “MATTY,” WALSH, WHIT JOHNSON, RUCKER, WOOD FADE-A-WAY, SMOKE BALL, etc. Illustrated COURSE OF LESSONS sent p. p. for 5. C. DORN, 721 S. Dearborn Street, Dept. 6S, CHICAGO, IL

PITCH SPITTER, NUCK Clearly described an by 56 Pictures. Entire

cabins,

MECHANICS FOR YOUNG AMERICA Plain and complete directions for building boats, wind mills, searchlight, camps, kites, etc. Popular Mechanics Book Dept., 200 E. Ontario St., Chicage. water motors, burglar alarm, ice boat, water bicycle, 6x9 in. Illustrated. 25c, postpaid.

PATTERN-MAKING for Those Who Should Know

— Swee — achine Work—

be without it. Pattern Mak INE Whlustra

Tells About ircular Saw—2 chapters on Machine ked Patterns—2 chapters on Large Pattern work — Pipe work —Stove pattern work — M: olding Pattern Work. CORE MAKING AND MOLDING Part II explains the simple and complicated problen core making and molding which every good pattern n aker should know. Telts about plex—principles in Molding—Loam Patterns—Loam ‘ Everyone following this trade or intending to enter it should have this remarkable book. ne anyone can afford to buy it. Those who have it, wouldnt Price Prepaid $1 dress upon receipt of purchase price. tod advantage of this remarkable offer N0W—before it is t: POPULAR MECHANICS BOOK DEPT. 200 E. Ontario St., CHICAGO Pattern making as a trade—The Tools Jointe—4 chapters on Turninx- 2 chapter Compiled by G. H. WILLARD, @ pattern maker of many years’ experience, for those who wish to increase their pay—or those who wish to enter this well-pay- ing occupation. Filled to the covers with helpful shop-kinks and actual working informa- tion. Practical instructions written in plain language, which anyone can easily read and understand. Learn at home —in your spare time. Bound in cloth, 224 pages, 312 illustra- tions, diagrams and working drawings, etc. ools—3 chapter: ov Simple Toole— ork—ross-Head Guide jing sin —Core making, simple and com -- Molds. e price is so low that This book wil! be sent postpaid to ar . Send today ake 48. Y¢ Ni think mon! Ver “nl

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POPULAR MECHANICS ADVERTISING SECTION 15 MEN !

KS,

nd of self. one with. YO U CA | 4 SIC could lowing <INOW “The twelve Se _years of training experience < Beh of this school is now open to you Se without leaving your home or job. You con can fit yourself now for the advancement you Chicago have wanted, or prepare tostart a business of yourown. CS Study at Home, or in Detroit—(or Both) , The M.S. A.S. Home Study Course is written so you can learn the business en- tirely at home, But it includes the privilege of coming to Detroit to take our practical course also, with actual experience in our laboratories and shops. You can start at home and continue your training here later if you wish to. If you plan to come to Detroit later, but can’t come now, start now at home and have that much advantage. That will save part of room and board expense when you do come. It’s a wonderful opportunity for you to make your start now toward ~ success. Remember that this is the only Home Study Course put out by a factory endorsed school. It is rc also the only Home Study Course giving you the privilege of continuation in a real practical school. . warga] Earn $125 to $500 Per Month Auto Factories Say: at «1 The Automobile Business is THE Business to get into. Studebaker: “We do not know a better automobile school cribed Over 12 million cars to overhaul and repair. Millions of than the M.S.A.S Maxwell: “We heartily recommend ir 25 batteries, electrical systems, and tires to repair and re- the M.S. A. S Hudson: “You will make no mistake by or place. Thousands of good garages are needed. Can you entering for a course Buick: “Course is thorough and AGO, iL! think of a better business for a man to get into? You can complete in every detail.’" Packard: *‘Have no hesitancy get started now—at home. You don’t need to wait until in recommending it in every particular.” The Automobile 1 grad- -atalog. on, D.C, ICA you saved up enough to come to Detroit for three Journal: “The M. S. A. 5. is the greatest institution - motors, months of its kind wcatoaid, Ay Very Easy Terms—Nothing to Wait for Now Get Started Now No matter what your situation is you can take this course, Now— when you are working—is the time to prepare and on the astonishingly easy payment plan. You pay as you train yourself for times when you may be out of a job. go and you take no chance. We give youa signed abso Have a good trade that you can work at anywhere any lute guarantee to give your money back if you are not time. That’sthe automobile business. With 12 million satisied with the Course. You are the sole judge of cars to keep running, a trained man can always get a good whether you are satisfied or not. job or open a shop of his ow: Don’t Say You Never Had An Opportunity! r ti 7 Here’s a golden one placed right before you, and everything made easy . » for you to take it. Write for full particulars today. The coupon is 7 the first step to success. Méail it to us now. MICHIGAN STATE AUTOMOBILE SCHOOL HOME STUDY DEPARTMENT 26 Auto Bidg., DETRUIT, MICH. The Automobile Center

= / potty t Mail Coupon To Day) s MICHIGAN STATE AUTO SCHOOL a 26 Auto Bidg., Detroit, Mich., U.S. A. as Please send me particulars of your Home Stud Automobile Course

i Name a Print or write plainly ‘ the factory Endorsed School si

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POPULAR MECHANICS ADVERTISING SECTION Jj Ona Job? NEES ee SHOP NOTES FOR 1923 =——p—) 5S a — — | \ | | It | ; _— — — — s — HOW MUCH do ARTISTS EARN? WoOvLD you like to earn $100 a week asa commercial artist? If youlike to draw, you should develop your talent, for well-trained artists earn $75, $100, $150 a week, and often- times much more. Beginners who can do practi- cal work soon command $50 a week. * The Federal home-study course develops your talent on a sure foundation by the quickest possible method, and makes the work truly a pleasure. It is the original, practical course in commercial art, created by men with more than 25 years’ experience in the field, and after 8. years of unequalled success today stands supreme as America’s Foremost Course in Commercial De- signing. It contains exclusive lessons from lead- ing American artists, gives you individual personal criticisms on all lessons and teaches you the meth- ods that make your drawings worth real money. Send Today for **YOUR FUTURE” If you are sixteen years old or more, and in earnest about your future, send today for this book. Itis beautifully illustrated, tells every detail about the Federal Course, gives you convincing proofs of its merits and shows work done by Federal Students. Fill out and mail the coupon NOW, kindly stat- ing your age. COUPON Federal School of Commercial Designing 691 Federal Schools Bidg., Minneapolis, Minn, Gentlemen: Please send me “YOUR FUTURE” without charge or obligation. Age... .Occupation Write your address plainly in margin. Please Mention Popular Mechanics The latest volume of Popular Mechanics series of year books tells 544 Easy Ways to Do Hard Things of daily use toevery mechanic. Among the many use- ful articles are Shop Crane—Testing Motors—Power Hammer—Arbor Press—Air Compressor—Turret Lathe —Bench Punch—Concrete Mixer—Bench Grinder Drag Saw—Concrete Tile. 224 Pages—436 Illustrations Price 50 Cents, Postpaid Nine of the volumes of Shop Notes issued previous ly are also obtainable at 50 cents per copy postpaid. POPULAR MECHANICS BOOK DEPT. 200 E. Ontario St., Chicago Every Welder Should Have The Welding Encyclopedia It is America’s most complete and authoritative reference and instruction book on welding. It gives you a vast fund of expert knowledge on all forms of welding, conveniently arranged, fully illustrated by drawings and photographs and written in language you can understand. It has the approval of the leading manufacturers in the trade. You need this book in your shop. 326 Pages--375 Illustrations--Clothbound Edited and Compiled by the Editors of the Welding Engineer with the help of rts . in the welding trade. _ CONTENTS Illustrated encyclopedia covering all words, terms and trade names used in welding—Oxy-acetylene Welding—Aluminum, Steel, Cast Iron, Copper, ronze, Full instructions for welding each of these metals.—Electric Arc Welding—Electric Re- sistance Wetaing includes Butt, Line, Percussion and Spot Welding—Thermit Welding—Use and Misuse of Oxy-acetylene Equipment—Boiler Welding —Heat Treatment of Steels —Rules and Reguiations- Charts and Tables, including temperature color chart— Condensed Catalogs and Buyers’ Index. The Accumulated Experience of the Welding Brains of America Yours for $5.00 Absolute Refund Guar- antee:— If, after having ordered and examined this book, you are not satisfied with same, return it to us and your money will be refunded Popular Mechanics Book Dept. 200 E. Ontario St. Chicago

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POPULAR MECHANICS ADVERTISING SECTION he m at why OF haat 4 Millions Can SellGoods -— but Dont Know It! Tisengh steurd superstition thousands heve bean» They think Selesmanship is « gift. w= * eery method whereby on - Proot of Every am ae nae « “imbp Act Hag tien, * 7 Statement \ This Amazing Free Book! You have seen these statements before. Some of them sound startling, but in look- ing at the proof you will learn facts that will amaze you~ facts that may possibly start you on the way toa prosperous future. ead our announcements time and again. Your Then why is it that you have 1 yourself enough to fill in and mail the for yourself the proof that we offer, Free! been aroused thers are now capitalizing on the urge that n to send for the amazing free proof contained book “‘Modern Salesmanship.”” They are earn y than ever before, realizing every reasonabl on through what they learned in this remark ny of them are making phenomenal ad uccesses earning from five to ten times as much a ned, © sent for this book once believed, as you may it salesmen have to be “born” to their task now have a two-fisted grip on prosperity virtually their own bosses. They travel with big business men—they their families live better and ion that is more like a fas- cinating adventure than work RE AD The fact that you are read- v4 | ing this announcement i proof | en | contact envoy vied them big money ina protes that you are anxious to increase While pps your earning power you may (think you can crease it in this way, you surely would spend two cents to find out So why not send for PROOF of how you can quickly fulfill your ambition. It come to you frec with no obligation ind after you have the amazing evidence you know beyond all doubt here is a sure and certain or you to make the money you ambition dictates lake any ten average met who are in blind alley job low pay Analyze each ca You will find that everyone of them is solely and entirely to blame |! his poor earning power without prejudice Every one of them at one tin another Ras nad a opportunit They eithe failed to recognize recognizing it, lacked the energy or courage to hs ip gut now comes vor chance vour one portunity What are you going Write for Your Copy Now This book, “Modern Salesmanship thousands have quickly succeeded how it is easy to make big money once you a in the possession of the S« Selling—how you can fundamental and achieve get these apply them i ! and permanent success \T LEAST read the book Then decide for yourself this important matter you fill the coupon into the mails tod National Salesmen’s Training Association Dept. 12G 53 W. Jackson Blyd., CHICAGO, ILI NATIONAL SALESMEN’S TRAINING ASS'N, Dept. 12G, 53 W. Jackson Blvd., Chicago, Illinois “Phe a se , . ind quali

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POPULAR MECHANICS

: e Master OF a Real Job Then you can walk confidently he plant, knowi into the office or ing you are needed and appreciated that you have a future bringing more power, better pay, bigger leadership. You ‘ant have to cool your heels” in waiting rooms looking anxiously a job at ‘“‘almost anything.” ye gan from One Who Climbed R. H. McElroy, one of the vice-preside f the Oi Compar } 101 r( Standard , who $30,000. lary from a clerical N.Y. Time } ri ¢ at uft ir co OF r mar s job Some of our 300 Correspondence Courses Technical Courses Commercial and Other Courses I 21 Ineura } Mat atical ¢ ureee I I s! Directors’ Training I I I I r " “ . ane ¢ Hi Show Card Wr ‘ I < Traffic Management Mark and mail the coupon for our friendly counsel. ll Address 74-Ju

Please write Dept. plainly

Correspondence! ‘x Instruction 347 Madison Ave: Please Mention Popular Mechanics | today.

ADVERTISING SECTION

Be A Practical] 5 Electrician) OU can qualify in three months f a real job by the Sweeney System « tical Experience. You don't: r be an engineer or scientist to j B . stall, operate and repair all Is of re electrical machinery. VW with tools. You learn by working on our $150,000 equipment in this world Million Dollar Trade Sc} g.3. sweeney, We have turned out 55,000 Precedent =. mechanics. Simply send name FREE Get wer te elie interesting Elec log. Free radio course. Free Railw Kansas City. Big opportunities in E) industry for youngmen. Colored stud accepted.

WRITE US AT ONCE LEARN A TRADE - S& ELECTRICAL SCHOOL 3 SWEENEY BLDG KANSAS CITY, MO. BE AN £ XPERT I TEACH BY MAIL. You can become an expert pen! your own home by my method. Smal! Cost All tl some of your Snare Time... Write for my boo I COME AN EXPERT PENMAN.” It contains how others became expert writers by the TEVIS MI 1 name written on a card if you enclose, sts emp. FREE | t T. M. TEVIS, CHILLICOTHE, MO. the I TAMMER| If you st: mt er attend no stam mering & my large IE book entitled * R Origin ed the Adv anced Natur al Mi bound in cloth and s un ped in pure gold tuition rate and a FRE i copy = “The Magazine.’ Largest, best equipr cessful school in the world for the stuttering, etc » sing-song or time The North-Western School, 2: 317 Grand - sim

Necessary. Play Music Your First Lesson,Wonderful Method Only 5 motions and you master them quick- ly fter a short period of easy practice you will be playing all the popular j hits, just as you have heard experts play P — them on the stage, in Dance Orchestra everywhere! It is the most popular instru- ment of the age and you can quickly learn to play it. Prof Barker will teach you to chord and harmonize exactly as he does in an amazingly short time! And re- member we furnish your tenor banjo free. Write for details of our course and free offer. Address First Hawaiian Conservatory of Music, !"c- Desk 60, 233 Broadway, (Woolworth Bdg.,) © Y.

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POPULAR MECHANICS ADVERTISING SECTION a1 5,000,000 Men Are After the Routine Jobs— Break Away From This Competition— business slackens, can your “let you go”— and tomorrow lmost any routine man from this my of 5,000,000 men and find him competent to take your place? Observe that when a business trims its crew, it is almost never the big-pay men who walk the plank only are the specialists retained—the Accountants, Production Managers, Traffic Managers, and, in fact, the managers of any of the important departments of a business — but they are frequently d. Other concerns are in need of their li nd come bidding for their services. Many of these men who today are going rapidly id were no better off than you, several years Today, while others walk the streets, these n walk into the better jobs. There is no mystery about their swift advancement. There isa way that’s interesting and practical whereby nyman of average intelligence can get the training put him in the ‘big- -pay class. Literally housands of ambitious men have found this way in the LaSalle Problem Method. They have chosen the of we work that most appealed to them—then, right quiet of their own homes, without losing an m work or a dollar of pay, they have solved ems they today are meeting in the better jobs. ns which they face today are identical with y faced in spare-time study. They have been actly how to meet them—guided every step » by some of the ablest business men, in pective fields, in America. hal is below. Also a copy of your booklet, 0 Bus in ess Management [J Law— O Modern Salesmanship [© Commercial Law Higher : heme Traffic Management Railway Station Management oom Efficiency om ame eae ee INQUIRY COUPON ©? 22? ee wa LASALLE EXTENSION UNIVERSITY, Please send me catalog and full information re garding the course and service I have marked with an X “Ten Years’ Promotion in One,’ Degree of LL. B. 0 Banking and Finance 00 Industrial Management 0 Modern Business Corre- spondence and Practice Read these statements, typical of over 1,000 which we will send you in booklet form and which represent but a small part of the many thousands of similar letters in our files: “The most efficient and most rapidly promoted met in our whole organization are LaSalle-trained “Promoted to General Manager.” “Now a director in two banks.”’ “From bookkeeper advanced t let salary increased 500%.”" “Passed bar examination with highest ger petition with many resident school gradi “The Problem Method increased my it a year.”’ “Passed C.P. A. examination. Youw terested to know that 50% of the successful candidates were LaSalle-trained men.” An analysis of the letters from 1,193 LaSalle members report- ing definite salary increases during 3 months’ average increase per man of 89°¢. While the axe hangs over every business office, it’s the time of all times to free yourself forever from the treadmill Aark on the coupon the training that attracts you, sign and aall it to the University. It will bring you full information, to- qocher wit th particulars of our convenient-payment plan; your free copy of the inspiring book “Ten Years p romorion in One. Break away from the crowd of routine pluggers. Find out today what YOU must do to put yourself among the men who nmand big money. Mail the coupon NOW. time shows an Dept. 664-R CHICAGO, ILLINOIS ’ all without obligation to me. 0 Expert Bookkeeping D Personnel and Employ- 0 Business English ment Management 0) Commercial Spanish 0) Modern Foremanship O aw Speaking & Production Methods (J C. P. A. Coaching

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20 POPULAR MECHANICS ADVERTISING SECTION LEARN CARTOONING. the Right Way © Have your ability trained by the school that has developed many famous cartoonists. lf you like to draw—if you find pleasure in picking up a pencil and | paper and trying to make sketches | or cartoons, don’t regard it merely asahobby. Have your ability de- veloped and earn a good income as a cartoonist. Hundreds of nationally known car- toonists, such as Branner of the Chicago Tribune; Blosser, who draws ‘‘Freckles and His Friends’; Gene Byrnes, creator of ‘‘Reg’lar Fellers’’; Thiele of the Sioux City Tribune;Fung, of the Seattle Times and others equally well known, took the Landon Course at home, in their spare time, and fitted them- selves for their present positions at salaries ranging from $50 to $200 and more per week. Have YOUR talent devel- oped by the same method What the above mentioned boys did you can do, with the same training. The Landon method re teaching makes cartooning easy t¢ learn. By means of an extensive series of Big picture charts all the necessary details of ORIGINAL drawing are explained step by step, in a clear and simple manner. FACTS that determine the supe- riority of the Landon School: Landon School Students are se- curing the best cartooning posi- tions which open up everywhere. The picture chart method of instruction was originated and is used exclusively by the Lan- don School. From the very beginning, the Landon Course teaches ORIGI- NAL drawing. No copy work. Individual attention and criti- cism of student’s work. Person- al coaching whenever necessary. Specialized instruction on how to originate cartoon ideas. This is an exclusive feature of the Landon Course. Practical assistance in securing positions for students and help in marketing their work. The price is within reach of everyone who is ambitious to succeed. Easy payments can be arranged. (OE RI RS, Write today for fullinformation about the Landon Course, and 6am Finc yle chart by means of which you can test your own ability. out what the possibilities are for YOU in this interesting profession. Please state your age “Che Landon School 838 National Bidg. Cleveland, Chio SADA ACR AACE Ae ae» SUCURUC UCTS: ce euereyy,, : FIRE! FIRE!! FIRE!" \\ NN ie, ily, A" Howat vi Uetz \\ We se Uy- Qt veddreadddddddudvddddd + NeuddunevenddedtZ. oN NUE GAS-FIRE MADE FROM AIR mixed with a little kerose - in any type co heating stove or furnace. COAL AT ¢& would not compare with GAS-FIRE in ec} cleanliness, convenience, efficiency. AGENTS $50.00 TO $250.00 WEEKLY HEAT APPLIANCE CORP. 109 N. May Street Chicago, Ill. P ZS TA LEARN tet TH PARI Qa eae vrrerveverrvvereverey + Watch Repairing r are siway i o§$ per week. For | Ginesuetn School of Watch Repairing 166 Mason St., MILWAUKEE. WIS wee Wn - OWN Yow cam mad Tua Likethu quiutly HOME Piano, Organ, Violin, Mandolin, Guitar, Banjo, re Beginners or advanced playere. One lease on week | lilustratione t lain Only expense about 2c per day to cover cost of postage ar » rite for FREE booklet which explains everything in full AMERICAN SCHOOL OF MUSIC, 50 Lakeside Building, CHICAGC Can afford to TAM or STUTTER : It ruins many chances for promotion Send postage for large free book *“The Correct Stammering and Stuttering."” Methods success Over a quarter-century THE LEWIS INSTIT! 33 Lewis Bldg., 77 Adelaide St., Detroit, Mich., | VANTED! \U. S. RAILWAY RTT pease ee rene al — $133 to $192 eee ly send me MONTH ft a Men—Boys & Mai Cenk (sicoot § as t " Carrier ri 18 or Over F ($1400 to $1800 a year Mail Coupon 4 Today Sure! rol Name e Address

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AIR IN ‘KLY o, lil. AaB Aan Repairing fepairir njo, ete. a CHICAGC = POPULAR MECHANICS ADVERTISING SECTION | Pay Your Railroa Ca rc a.o@o The Electrical Center of the World B. Ww. Cooke President Come to Chicago—the Electrical Center of the World —I pay your railroad fare inti any place in the ed States. —get experience. Come to Coyne— le Grasp this opportunity to see the country at my expense. arn electricity in 3 months. Don’t stick in one spot—travel Fit yourself for a big paying job. The tgest electrical school in the country ig te in electrical instruction ONLY Learn Electri city in 3 Months Get a complete training so you can make big money as Power Plant Operator, Superintendent, Telephone n, Construction worker, auto, truck or tractor electrician, battery man, radio expert, or you can go to business for yourself as electrical contractor, dealer, auto ignition or battery expert and make from $3,000 to $20,000 a year. same if you grasp this opportunity—act now. Hundreds of our graduates today are making big money and you can do the Great Shops of Coyne No books or useless theory. You are trained on $100,000 worth of electrical equipment. Everything trom door bellsto power plants. You work on motors, generators, house-wiring, autos, batteries, radio, switch-boards, power plants—everything to make you an expert ready to step right into a position paying from $45 to $100 a week. Earn While You Learn! RADIO COURSE FREE, We include the following free with the regular course: (1) A complete course in auto, truck and tractor electricity and storage batteries. Greatest outlay of auto, electrical and battery equipment in the country. (2) Course in Radio—the marvel of the age. Constructing, install ing and operating. Build your own wireless telephone set. (3) Life membership in the Coyne school. Stay as long as you wish and return for further training at any time in the future. We help students to secure jobs to earn a good part of their expenses while studying. Send Coupon = Don’t delay a minute — send that for our big free catalog and full particulars of Free Remember this special offer is limited so act now! coupon right now Railroad Fare offer. Endorsed by Electrical Industry 1300-1310 W. Harrison St., Dept, A-135 B. W. Cooke, Pres. Coyne Electrical School = 1300-1310 W. Harrison St., Dept.A.125 Chicage Dear Sir: Please send me free y ur big catalog and full particulars of your special offer of Free Railroad Fare and two extra courses. Addsess. coccccccccccccccccecccces PTeTTEEIII eee eee

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POPULAR MECHANICS ADVERTISING SECTION Only 8 weeks to set a bis job in auto @& tractor business Louis Emanuel Rushfeldt, Al- made foreman over men berta, says: “Earning $10 many years older. That's a day and only 20 years not luck—it’s Rahe training. old,” Big Firms Need Trained Men The Auto and Tractor Business is on the boom. Thousands of trained men will be needed during the next few months. I get calls every day from Garages, Battery Stations, Auto Repair, Welding Shops and other successful concerns for Rahe men. When the big fellows need high grade men they know where to come for them. They want Rahe Beimer at 24 was trained men who know the work from A to Z. My Training Unusual You do latest engineering standards. Thousands of dollars have been spent in modern tools and equipment. That’s why my men are at home in the biggest shops in the country. If you want to succeed the way Beimer and Rushfeldt and the rest have—qualify by the same method. rill Pay Your Railroad Fare and Board You In order to fill the openings that now exist, I am making an offer no one has ever made before—Free railroad — e, kree board. But even that is not all I'll tell you rest in my letter. Write me at once. Rahe tractor SCHOOIS TRACTOR CINCINNATI CHICAGO 4445 Grand Bivd. Ninth and Wainut s how others are succeeding. My big illustrated trainine book te It tells many thins you ought to know about Autos and Tractors. Write for it and my short time offer NOW. tt soon expires. Scientific tool training — that’s the secret. things here according to the Dept. 904 PY oe Qe Vention Popular Mechanics ABig ra for Men and Women Be a Creative Commercial Artist. Don’t the “‘tell me what todo” kind. Creative artis: are worth from $100.00 to $500.00 perweek a more. Our academy is the only school basing instruction upon the actual practices of the Master Commercial Artist. By analysis Commercial Art Master Pieces we find t! methods of the artist. By constructive struction we teach these principles, developi: the student step by step, until he is produ high grade Commercial Art. The 1923 edition of our course embodi« up to date Commercial Art Practices. Larg¢ Commercial Art houses, employing hundred of artists, have endorsed us as their trainir school. Students finishing half of this usual course can secure and hold desirat positions. Four month students can begin sell drawings. Home study or class roominstruction. Bot day and evening classes. Get our big beaut fully illustrated book telling all about C \ mercial Art and the opportunities it sents as WE TEACHIT. Send 6 cents stamps for a copy. ) NATIONAL ACADEMY OF COMMERCIAL ART . we a 230 EAST OHIO ST., i GEE CHICAGO, ce ASS i L L . “STAMMERING | lfs Guse and dire ” You can be quickly cured ff you stammer. or stamps, for 288 page cloth bound book on Sta Stuttering. It tells how 1 cured myself af Stuttering for 20 years BENJAMIN N. BOGUE 6910 Bogue Building, 1147 N. Ill. St. Ind SMusic Lessons = At Home- Any Instrument Writ Music, Violin, Cornet, Mandolin, G uitar send FREE CATALOG. SEND for it NOW! University Extension Conservatory, 786 Siegel-Myers Big. Chicage | HOW TO BECOME A PROFESSIONAL PHOTOGRAPHER EARNING $35 TO $i25 A WEEK Three to six months’ course. | Picture, Commercial, rt Practical instruction. Modern « Ask for Catalog No. 49. is te INSTITUTE. yd Peat ti Y NEW YORK KLYN 141 W. 36th St. 630 s" Wabash Ave. ses State St LEARN WATCH REPAIRING Bea watchmaker—you can learn this profitable trade by correspondence in a few weeks in your own home by the DeSeims Chart System. After you complete the course you will know a watch from A toZ. You will know just what the matter is and how to repair one. When you graduate you will be & practices! watehmaker and repairer and competent to Gllany position _ Positions! or our graduates. Askforour Free Book. itexsiainsour system and terms THE DeSELMS WATCH SCHOOL 23 Perry Street ATTICA, INDIANA Send 1 - on . Pl Complete Conservator) Course by Mail na ne Pianc Harmony \ Han jc »or Reed Org

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POPULAR MECHANICS ADVERTISING SECTION How Do You Look in a Bathing Suit? good old swimming are here. Oh boy! it's great to rip off the hirt, into your suit and the splash. But what ik to some of the poor when they see their es come out with flat ts and skinny arms in- id of the robust frames expected to see. You Can’t Fool Them Don't try to make excuses. You should have knobs on your like a baseball. A fine ector you would make, when can’t even fight your own What are you going to ‘is going to find you out. Look Your Best "S not too late. I can Save i yet. It means hard work plenty of it, but think of esults. In just 30 days I ing to add one full inch ir biceps. Yes, and two on your chest in the Led le neth of time. But that Ss EARLE E. LIEDERMAN as he is to-day i starter. I am going to ; ; ut those shoulders and put real pep into your old backbon You will have a spring to tep and a flash to your eye, showing you to be a real, live man. Before summer is past you ognize your former self. You will have a physique to be really proud of. Thisis1 ws. I don’t promise these things. I guarantee them. Come saeed make m« Send for My New 64-Page Book, “MUSCULAR DEVELOPMENT” It ains forty-three full-page photographs of myself and some of the many prize-w | ved trained. Some of these came to me as pitiful weaklings, implorit ig me to Look them over now and you will marvel present physiques. This book will prov: tus and a real inspiration to you. It will tu through and through. All I ask ts ts to cover the cost of wrapping and mail d it is yours to keep. This will not obli uu at all, but for the sake of your future ind happiness, do not put it off Send ight now, before you turn this page. EARLE E. LIEDERMAN Dept. 2006 305 Broadway NEW YORK CITY EARLE E. LIEDERMAN Dept. 2006, 305 oe New York City Dear Sir I enclose herewith 10 « I | you are to send me; withou part whatever, a copy of \ cular Development plainly. NAME STREET CITY

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POPULAR MECHANICS $2500 Reward for the Conviction of — — HO murdered John Blake? The country was stunned by the crime mystery of the year. Arich reward was offered. There were clews a-plenty Circumstantial evidence pointed to a dozen men. But the District Attorney didn’t dare bring anyone of them to trial. Then the Finger Print Expert stepped in. With feverish excitement the crowd in the courtroom listened. Judge, jury, attorneys and anlookers leaned forward in strained silence, eager to catch every word. The young Finger Print Expert in the witness chair was the center of attraction, as with calm assurance, he gave the evidence that convicted the murderer, ‘and brought him the $2500 reward. I Can Make YOU a Finger Print Expert I have trained hundreds of the men now pro- minent in the Profession. For instance, there’s Harry Passno, Chief of the lowa State Bureau. He had no previous experience—no college or T.G. Cooke, high school education. He was just a country President photographer. | trained him I can do the same for YOU. You may study right at home—in your spare time. Right NOW is the time tostart. More trained men are needed to fill the positions created almost daily. Salaries are high. Chances for big rewards are frequent. The Finger Print Expert is respected and deferred to by all. I am offering you a big opportunity. Will you take it? Professional Finger Free Print Outfit — A professional outfit, just like the Finger Print Expert uses in court, in the laboratory and at the scene of crime, is yours FREE with this famous course of training. Also a course in Secret Ser- vice Intelligence is FREE to you if you enroll early. Mail the cou- pon for my free book telling all about the exploits of finger rint detectives and full information about this wonderful pro- ession, and your opportunity as a Finger Print Expert. T. G. COOKE, President UNIVERSITY OF APPLIED SCIENCE 1920 Sunnyside Ave. Dept. A-135 Chicago, Ill. SSRERESESESREEESESEEEEEEEESESEEEEEeeeeeeeSe University of Applied Science, 1920 Sunnyside Avenue, Dept. A-136 Chicago, Ill. Gentlemen: Without any obligation whatever, send me your new, fully illustrated, FREE book on Finger Prints and your offer of a FREE course in Secret Service Intelligence and the Free Professional Finger Print outfit. Name... Address City and State Please Mention Popular Mechanics ADVERTISING SECTION I Teach by Mail I can make a good penman of you a home during spare time, no matte you live or how poorly you now writ simplified system has shown ti the way to good penmanship dy vast twenty-five years it CAN ILL do the same for YOU = My beaut Was pe } illustrated ugnature. above end bekw Book : 2 weaderial improve- 6 ‘“ vx months | How to Become “° | a Good Penman rad ? ; FREE!! It contains many beautiful spec penmanship showing what others |! complished by the Tamblyn Sy testimonials and general informat ur courses our name + lege antiy w card if you enclose siamp Jor taughtas successfully as men Nirike Today. 4 fF. W. TAMBLYN 418 Ridge Bidg. Kansas City, Mo., U.S. 4 ——_——_ — Pe SPYL OPT UY, men With trat: demand. F« ELECTRICAL 22.2": school has been training men of ambition and lin the electricai industries. Condensed course in ! ENGINEERING : and promotions. Theoretical and practical Electricity, M Steam and Gas Engines, Mechanical Drawing. Studs dynamos, install wiring and test electrical machinery. EAR Course with diploma,com plete Thorouchly equipped fireproof dor ing hall, laboratories, shops. Over 300( Write for catalog. 31st year beginsS BLISS ELECTRICAL SCHOOL 104 TAKOMA AVENUE, WASHINGTON, D.C GTAMMER wv’ MORE Kill the fear of stammering. Re-educati widely famed Hatfield Method fully « curate, dependable, Worthwhile b STOP STAMMERING.” It ha - we THE HATFIELD INSTITUTE, 109 N. Dearborn, Chicago, Ih VX. GET DOLLARS OUT OF WATCHES WATCH-REPAIRING. ENGRAVING. JEWELRY REPAIF WRITE NOW. TRADE 530 W MONUMENT SQUARE, IN YoOuR SPARE TIME Learn law with only ing same course by cor was given for year: at ot this college. DE GREE of CONFERRED. Or course prepares you for business, Law trained bu demand. Three year uni covers preparation for bar Money back guarantee if not satisfied. | terms, includes complete 1921 thirteen vo text material and all expenses. Write for FREE BOOK Hamilton CollegeofLaw $23.%3," ENICAR Earn Money Drawing Pictures Opportunity to increase your @arnings. Learn te. do at once and Y HUNCHES FOR book instructs you, How and What to Draw and Where ‘to |. List of Markets, etc. For the artist in the country as we lias the city. Satistaction aranteed nd $1 TODAY for copy or send stamp or particulars, NOVEL ART STUDIOS, Dept. D, 7 East 42nd Street, NEW YOR!

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POPULAR MECHANICS ADVERTISING SECTION ome wuLtoD A Big Raise in Salary! | Is Very Easy to Get, If You Go About It in the Right Way You have often heard of others who have doubled and trebled their salaries in a year’s time. You wondered how they did it. Was it a pull? Don’t you think it. When a man is hired he gets paid for exactly what he does, there is no sentiment in business. It’s preparing for the future and knowing what to do at the right time that doubles and trebles salaries. Remember When You Were a Kid We Will Show You How nd tried to ride a bike for the very first | Without lossto you of a single working hour .e? You thought that you would never we can show you a sure way to success and in and then—all of a sudden youknew big pay. A large number of men in each of w, and said in surprise: “Why it’s a cinch the positions listed are enjoy ing their salaries if you know how.” It’s that way with most because of our heip—~ we want to help you. + ‘noe and getting a job with big money is Make check on the coupon against the job you want . “ and we will help you to get it. Write or print your no exception to the rule, if you know how. name on the coupon and send it in today. American School | Dept. G.A-74 Drexel Ave. and 58th St., Chicago meme American School, Dept. G.A-74 Drexel Ave., and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. a Electrical Engineer .««---5team Engineer .. Building Contractor Electric Light and Power Foremanship Automobile Engineer General Education Sanitary Engineer -Automobile Repairman Vocational Guidance Surveyor (& Mapping) ..Civil Engineer Business Law ee ~ teers Structural Engineer Telep oor —aparengel Business Manager Machine Shop Practice Telegraph Engin er . Cert. Public Accountant Photoplay Writer High School Graduate Accountant and Auditor Mechanical Engineer Fire Insurance Expert Bookkeeper .....-Shop Superintendent Wireless Radio . Draftsman and Designer ....--Employment Manager Undecided

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POPULAR MECHANICS ADVERTISING SECTION EARN? 400« LIVING EXPENSES Paip Many Employees WANTED By Leading Hotels 2 Room Clerks $175-200 Mo. $375-425 Mo, 1 House Cashier $175 Mo. $10,000 Yr. 1 Housekeeper 1 Steward 1 Manager $175 Mo. 1 Storeroom Bookkeeper $150 Mo. 1 Asst. Manager $225 Mo. 3 Mail Clerks $125-150 Mo, Many positions ym and meals Partial list with roc rooms furnished rapidly, men to guide them. WE TRA We have successfully trained thousands by mail for higher better pay. We w necessary. the true in your spare time positions previous experience to fill any hotel position hotel business — all each day for a few weeks. Trained men earn because they have the experience of successful Prepare for well-paid HOTEL Position waiting for you Fit yourself for a posi- tion leading to rapid advancement in the most fascinating busi- ness in the world—full of big opportunities for the trained employee. BIG PAY Fine Chance for Advancement Beginners earn $80 to $200 a month; meals and often more—advance more IN YOU ill do the same for you—no We will teach you how fundamentals of the , of a few minutes A Position is Waiting for you When you graduate, you don’t have to look for a position. Positions will look for you. Hotels are looking to us for trained employees. They welcome our graduates. Will you be Secures Position Before Graduating I had not ictioys even re “yo u plac ed me a significs is t ions I ny kind of hotel 1 W. Zipprich address sent one of the such Send Coupon Today! STANDARD BUSINESS TRAINING INSTITUTE sought-for men ane as listed in our bulletin, 7 * Y . @ bulle * * = * * * 1 women to fill the positions which you should send for? ELECTRICITY Learn and Earn Be An A1\| Make Real Mong at Electricity in any way it Electrician is followed is a real money-maker for the man who has had this standard training, Electricity is the CREAM of the automo- tive business. It is one thing the average auto mechanic is weak on. We are especially equipped to teach this business RIGHT, as well as all branches of the automotive business. The very best ideas, coupled with years of experienc have been combined in working out a con- tinuous and well-rounded system of prac- tical training, made as simple as it is humanly possible to make it. Write for Big Free Catalogue Today lowa State Auto and Electrical School 739 Nebraska St. SIOUX CITY, IOWA sow CARDS Big field—un- ee ‘pos ene for men puree de- Work in- Ay NS Nt. § mid ve 8 at ely Oa ‘$25 TO ‘$75 WEEKLY You can doit if ambitious. Successful graduates everywhere. Our course th covers every phase of work. O ol pie »8 Cor Write for catalog, sa Detroit Schoo! of ‘Lettering, “630 D. S. L. =: ‘Detroit, Mich. 7 Me _~# ty ar sd original ty. sal agian HigHer EpvucatTIion Courses in English, Spanish, Mathe- matics, Chemistry, Drawing, Educa- tion, Business and in 35 other subjects are given bycorrespondence. Beginany time. Che University of Chicano 3ist Year Division 4, Chicago, I Spe ceSaeaaseeeranaaaeas « Standard Business Training Inst. : Carlton Court, Buffalo, N. Y. * Send “me free booklet H-166 giving full information about Hotel Operation and Manage- ment Course, also employment tin listing positions open, ime Carlton Court i int Buffalo, N. Y. Cit nm P opula) VU echanices at Homeby Mail Yes, learn the secrets of Wor! Champions—how to wrestle ext how to handle big men with eas to win. Be athletic, be strong, © healthy. Learn how to detend yourself. Farmer Burns ~ the world’ s most scientific wrestler, who trained the undefeated Champion Frank Gotch — who also trained six other World’s Champions, wi now train you. Investigate today his wonderful methods— the - of Champions. Eve ry man and boy in the world, no matte" Bt age, needs this information on SCIENTIFIC WRESTLING — PHYSICAL CULTURE — JIU-JITSU — SELF DEFENSE. send your e nd get my splendid 5” Free Book fitusteeeed 2 7 athletic book _- —* y —no obligations of any kind. Write N NOW. FARMER BURNS, A177 Ry. Exchange Bldg., Omahs Neb.)

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n ney vay it real * the ining, tomo- hanic

POPULAR MECHANICS ADVERTISING SECTION

You Can Easily Learn to Play Any Music on the HAWAIIAN GUITAR just As Hawaiians Do — Native Instructors Teach You QUICKLY! Here's Proof of our | Half an Hour You Will Be Playing “ALOHA”. Soon You Will Be Winning qemarkable Course Praise Everywhere Playing “Stumbling”, “Three O'Clock in the Morning”, Saran ve, “Hot Lips” and ALL Popular Music as Well as the Beautiful Hawaiian Melodies nths since 1 Here’s the chance you’ve been waiting for—the oppor- e onth tunity to play popular music quickly on the most en- trancing instrument_of the age—the Hawaiian Guitar. FR EE No previous musical knowledge necessary.

vas - ONLY FOUR MOTIONS TO LEARN This $15 a - yours, and these you acquire in a few minutes. No trouble ial 1. Hammond ®0me scales or runs, you begin to play harmonious Hawatian chords immediately! We don’t care if you never saw a feqtine ia ter School, note of music in your life, we guarantee to teach you 8 f ~ niin St, to play just as the Hawaiians do! hoy, Tewaiian Conservatory | We Furnish Everything—s Beautiful Hawaiian — YOU. will be ‘ astaliaie Guitar, Picks, etc., and 52 Pieces of Music FREE! © of ht © es anew. wea wee always wanted to play some instrement. 80 tone of this ont s mine to de we have made it unusually easy for you by furnishing splendid Ha- wo. Mr, W json has not everything —a beautiful Hawaiian Guitar,complete Con- waiian Guitar p . ut ao. wit S8ervatory Course of instruction and 52 pieces_of espe- = —— ‘ ~ 4 ngaletter Cially selected music. — -

No Other Course Teaches as Quickly and Easily I First Hawaiian Conservatory of Music, Inc., This is the only Conservatory Course where you get the Desk 48, 233 Broadway (Woolworth Bidg.), NewYork, anyone whom Personal instruction of Native Hawaiian Experts—Frank Ferera, Walter Kolomoku, Lawrence Kalaluki and Carl

end me at once Geen — oat your 52 easy lessons and

tudent Seville,famous the world over and the most noted makers I FREL Hawaiian Guitar 0 W.L. Walker of phonograph records, supervise your playing. r Mail Coupon for Detaiis of FREE Offer |! yin. sss ses under a . rs ree ie ‘ -s. Tenor.| Don’t wait another minute—clip, fill in and mail the is Banjo-| coupon NOW and get full details of our remarkable TTkelele offer to teach you how to play the Hawaiian Guitar just la : as the Hawaiians do. GIGED cccoccccnececcccocccecce —_ nstrumente ‘ pair Special Arrangements for Lessons if You | ave Your Own Instrument | , Print name 7 > ATION EW 'BE A NEW SPAI E R ARTIST! AVI F R E BD Win fortune and fam. MANUEL ROSEN. BE RG < on RSE IN ‘NEW SP APER ART Information ou how. #1 Lessons and 150 illustra Dr “ ! — CASY ( piet n- Send us your name and address for full information regarding the | ruction in lettering, illustration, Aviation and Airplane business, Find out about the many great | cariooning and ske ching ren years’ experi- opportunities now open and how we prepare you at home, during | ence as staff artist of important Amer " spare time, to quality. Our sew book “Opportunities in the Bir- es. Ret cd 8: orde 5 0. a j y money ref ri fvouc wwree that this

plane Industry” als@sent free if you answer at once. AMERICAN SCHOOL OF AVIATION Dept. 119A ___3601 Michigan Ave. CHICAG o

is the greates art course Llue ever « MANUEL ROSENBERG, Butler Bide. P. M., Cincinnati, 0

. Trae — » Whatewer Cour Queshon; —be it the pronunciation of~ rr aes Bolsheviki,the Spelling of a puzzling word, the location of Murman Gasl/y/ 2/7) the meaning of blighthy, aaodaahsteieloeste.,this Supreme Authority~ / ‘WEBSTER’S NEW INTERNATIONAL DICTIONARY uf 400,000 Words. 2700 Pages. 6000 Illustrations G.& Cc MERRIAM CO., Sprinafield, Mass. SS BESS = ’ and FREE Pocket Maps per Popular Mechanics

contains an accurate, final answer and India-Paper Editions. Aw: te for specimen pages, prices, etc.

i Take the First Step for a U. S. Government Job Use Coupon Before You Lose It $133 to $192 a Month for Life nd week off with full pay —no “lay offs” because poor business, etc.—sure pay—rapid advancement to ms. City and country residents stand same chance sense education sufficient—no political influence. DON’T DELAY—ACT AT ONCE pon today—sure. Every day’s delay means so much less appointment from the next examinations—so write at once FRANKLIN INSTITUTE, Dept. $181, ROCHESTER, N. Y.

COUPON FRANKLIN INSTITUTE. Dept. S181, Rochester, Le ¥. Kind ly send tirel eof chare« ‘ ription of the po

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wertgesst 20 s obtainal ex ; Tell me w te get the position here checked Railway Mail Clerk ($1600 to $2300) Customs Positions ($1100 to $2000) ...Pestothee Clerk ($1400 to $1800 Interna! Revenue ($1100 to $2000) City Mail Carrier ($1400 to $1800 Rural Mail Carrier ($1800 to $2600) ...Income Tax Auditors ‘ $2040 to $3008)

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POPULAR MECHANICS ADVERTISING SECTION Wonderful, Easy System—The BOYD Writers hold World’s Record \ 100 to 150 words a minutein 30 days guaranteed \ Big demand for trained Stenographers and Pri- vate Secretaries. Learn a profession that pays big What Students Say: “Your Course is Wonderful.”—M. R “It beats all other Systems.’”’—F. Z The Boyd can be tearned in one-sixth the time of other systems. Itisthe NEW WAY in 8! or Dictation first week—in 30 days you are ready |aposition. Send today for Catalog and Mone a | Guarantee. CHICAGO HOME-STUDY SCHOOLS 802 Reaper Biock Chicago, Illinois “BE AN ARTI “7 ’s One M : a » We can teach you 1ere s ne Jian C7 \ DRAWING in — ° ~ . - . . 0 loe y ‘ your own home y, during your hd aga et] We’re Going to Keep oun sg Copa dine = - years of success- P . . ful teaching prove our “Ed Wilson, there, is one of most mbitious men ability. 10 Courses in in the plant I notice that he never foo way his spare Commercial and Illus- time He studies his International Correspondence Schools ; trative Drawing, Course every chance he get ‘ Teachers Normal and \ It's t ; et ee een Applied Art. Endorsed S been the cing of him, too. He hasn't been here by high art authorities net irly so long on owney, who was laid off yesterday Students trained by members of yut he knows I m uc ibout this business our Faculty are filling high-sala- I'm going to g 1im Tom’s job at a raise in salary. ried positions. Artist’s Outfit FREE to He’s the kit f man we want around here. a Students. Write today forArt Year is FREE yo) Book ScCHQOL“APPLED ART } yeh do you stand in your shop or office? Are you an I m or a Tom Downey? Are you going up? Or or | AppucpAntBipc.No. 2 BATTLECREEK Mich. GR No matter where you live, the International C peje n= | dence Schools will come to you. No matter what your handi- | caps or how small your means, we have a plan to meet your an ow circumstances Ni 1 down? » matter how limited vy ur previous ec tion, the simply rt wong ended illy Sicenentod LC. s — xt- how you can make $75 a week ooks make it easy to learn without money or experience and get your as, oun : — dame 4 ; pay daily, selling Men’s $50 Suits for $29.75 ¢ mark and mail this coupo: would you investigate? Write LOUIS SCHWARTZ, Mer., Park Tailoring Company, Dept. 628, Chicago 1 TEAR OUT HERE — — — — — — — INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5524-D, Scranton, Penna Without cost or obligation, please tell me how I can qualify for the position or in the subject lefore which I have marked an BUSINESS TRAINING COURSES Business Management C} Salesmanship Industrial Management {Advertising Personnel Organization |} Better Letters : Traffic Management () Foreign Trade Wonderful, new device, guides your hand; corrects y C)Business Law [)Stenography and Typing | infewdays. Big improvement in three hours. No failu Banking and Banking Law Business English | plete outline FREE. Write C.J. Ozment, D-34, St Accountancy (including C.P.A.) Civil Service yend Sp z, Summer and Fall Nicholson Cost Accounting Railway Mail Clerk WHY NOT a wd pm Thee roy i —— Bookkeeping Common School Subjects buy hundredsof kinds for collections. Some worth $1 Private Secretary High School Subjects to$7 each. Simple outdoor work with my instruc- Business Snanish (French llustrating () Carteoning tions, pictures, price-list. Send 10c (not stamps) for TECHNICAL AND INDUSTRIAL COURSES my Illustrated Prospectus before sending butterflics. Electrical Engineering Architect Electric Lighting Blue Print Reading Mechanical Engineer (Contractor and Builde r Mechanical Draftsman Are hitectural Draftsman Machine Shop Practice Concrete Builder Railroad Positions Structural Engineer Gas Engine Operating P! r and Heating . Civil Engineer y (LJ Pharmacy = eurvering and Mapping omobile Work — oy hs Ay eB I Metallurgy Mining vigation Steam Engineering )Agricuiture and Poultry No tesious, ding ‘brief, — Radio OD Airplane Engines [Mathema : lessons which you can ste? : = Home in Your Spare Time Name . ° ccocese y> ~, Send for the FRE! ( Street 3 P 4 7) It tells how to start Address // want musical a : ‘ . > which friends will mat City " : suite state . anes / wagana SCHOOL OF must, / Dept 561 Niagara Falls Mr. Sinclair, Dealer in insects, Dept. 6, Ocean Park, Callit Occupation ove Persona residing in Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada,

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1e BOYD rd ruaranteed, 8 and Pr. at pays big. R.W th e time of Shorthand, © ready for lone y-Back eek your iThe res Ted & » Ce 5 6 POPULAR MECHANICS ADVERTISING SECTION , LIONEL STRONGFORT ent, of Harvard, deciared that ‘*Strongfort is estionably the finest specimen of physi- al development ever seen coy information i ho d for LIONEL STRONGFORT Physical and Health Specialist Dept. 348 N your copy at once ) i } of this wonderfully instructive book. It's absolute k the subjects on the free consultation coupon / on which you want special confidential mm extra line) ; ; 5 ith 10c (one dime) to help pay postage, et« | Rupture Constipation Skin Disorders ind send w ie renewet my free book Founded 1895 1e¢ Lion nd Health iples of St ive lestified excellent and with it a message of renewed life 1 success—that will mean all the world to Right Now, TODAY. el Strongfort, Speciaitst onafte wrtiam reputation h to the benefits gained under his guidance of a Man Loup altade W4 . — _ To be a real man, you must be strong, healthy, vigorous, vital—overflowing with power and force and possessed of the determination and endurance to do a man's work in this world and win the success and | appiness that every red blooded man wants Make Your Fondest Dreams Come True _. Every man worthy of the name dreams of the day when he will! achieve his ideals and ambitions. Can you make your dreams come true? Have vou the power and personality to win recognition and financial success? Are you physi- cally fit to fight the battles of life and forge up to the front with the winners? Answer these questions frankly and then resolve to make yourself over into a real 100% man Be an Ideal of med Blooded Manhood Nobody Loves a Weakling. No one has any u ra weak, sickly man— always ailing and complaining always discouraged 1 despondent Be down—held back—retarded with pimply face ry eve nas f ible dispo- sition, indigestion, dyspepsia crippled wit! la he rheumatisr und =the numerous other results of neglect, et« get expect your wife, your parents, your friend hess or society to put up with you mucl healthy, successful men nobody wants a con looks dark and gloomy to you—but cheer up yourself with STRONGFORTISM The Modern Science of Health Promotion The Principles of Strongfertism are based my . er) internal muscular harmony and strengt! he ey » lasting lant ulth and Vitality The Heart, Lungs, St through virtue of the contracting tures. Circulation, Digestion, As of internal muscular action. The Strongtort Methods all ailments and weaknesses an scientifica the important interna iscles, provid a 1x appoint Once you accept Strongfortism, : mediat« nd positive Yor body V s feel now etrenat? nd power devel r rear me tr tur you acquire new poise and a magnetic per Your success with Strong- fortism is guaranteed. Take the First Step Now Don't put it off don't fe You won't get bette You w i V ‘ i up your body the Sommer it w take to a re n of ve | Fe make up your mind, NOW. eee eee i Pe ee eee Se FREE C¢ CONSULTATION COUPON | Write for my FREE BOOK | ABSOLUTELY CONFIDENTIAL ee ee oe “N es cid me your book, “PROMOTION AND CON- tific applic ation of ature’s SERVATION OF HEALTH, STRENGTH AN corrective forces is c'early and MENTAL ENERGY.” for p < ial cog Be frankly explained inn Dp . — s a l0e piece } el r pec

N U famous book ‘Promotion and Conservation oe eaith, trengt an Routes Energy.’ It con Colds Catarrh Debilit tains a price ess messa‘e for Asthma Blackheads Weak Eyes every man and woman bos Hay Fever insomnia Gastritis and girl. No one should Obesity Short Wind Increased Headache Flat Feet Height Fear Stomach Heart Weakness \ hinness Disorders Poor Circulation on extra line how bligatior Lumbago Biliousness Neurasthenia Neuritis Torpid Liver Despondency Neuralgia Indigestion Round Shoulders Fiat Chest Nervousness Lung Troubles Deformity Poor Weaknesses Describe Memory Specify Diabetes Rheumatism Muscular Femate Pimples Development Disorders Falling Hair Great Strength Newark, New Jersey the World's Famous Athlet as achteved ynderful t Thousands of pupils through Age Name - Pe Street his professvon and can on to do exactly as he promises

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30 POPULAR MECHANICS ‘Im at the Top That’s as high as I can climb in my present job.” So wrote an ambitious lineman to the United Y. M.C.A. Schools. He didn’t want to climb poles all his life, so he enrolled for a practical course of home study to help him to a higher position in his chosen field of work. He is making progress. He feels that ahead of him are the larger responsibility, the lead- ership, the higher pay and the better privileges, comforts and that ire sure to come to the man who puts more into his head asso iat ions Have you can with is high you you now know? Do vou need more knowledge to climb higher? Face these questions. gone what as big During the last three years our friendly has been given to more 35,000 men who have enrolled I nited Y M.C.A. Sx hools’ dence courses counsel than for the ( orrespon- a new type of instruction from competent instructors that em- 5 phasizes service on all your problems. Some of our 300 Correspondence Courses Technical Courses ar Manag nt Rur I anahig M al FE i y tad t z Rad Tele Commercial and Other Courses I 2s Faciich Sus as Fina F I I I mao = H Ww se Ad strat I n Management If you want to climb higher, send the coupon for our friendly counsel. ‘ Tratt bligating me, please advise regarding ¢! Full Address Dept. 2-Ju United YM.C.A Correspondence | _ __}" Jhe most Service, Instruction \/7 for the least Money 347 Madison Ave, /New York City.NY. ADVERTISING SECTION WE TEACH COMMERCIAL Meyer Both Company, the largest Com- mercial Art Organization in the World, offers you an unusual opportunity for practical training. I you like to draw develop your talent. Study this practical course—taught by this nationally known organization with twenty-two years success—who each year produces and gells to advertisers over 15,000 commercial drawings. Our teachers give you the double advantage of being instructors of proven ability, as wellas artists in this widely known organ- ization. Meyer Both instruction is the difference between successful fact and experimental thecry Commercial! Art isa highiy paid, intensely interesting profession, equally open to menand women. Home study instruction. Get Facts Before You Enroll in any School, Ask the Advertising Manager of the leading newspapers in your city, anywhere in the United States, Canada giar —let them tell you about us. ur illustrated book telling about the success of our students—for one-half the cost of mailing—four cents in stamps. MEYER BOTH COMPANY Department of Art Instruction Michigan Ave. at 20th St., Dept. 16 CHICAGO, ILL, NOTE—To art and Engraving Firms: Secure practical artists among our graduates. Write us.. Make $75.00 a Week on the Side Establish rself asa Photographic Expert uickl uring your spare time—under a eading photographer. I’li show you how to etart your own business—or command a large sal- ary. Sendformyunvsua! offer—it’sonly tem » Act atonce. A postal will do. H, R. VANT. INTERNATIONAL STUDIOS, Inc. Dept. 119A, 3601 Michigan Ave., Chicago, U.S. A. POSITION GUARANTEED The Finger Print profession wants men immediately Big pay, Interesting work, no lay-offs or shut-downs. | wil! ea a. you quickly to become a trained Finger Print exper I guarantee a position and back it up with a $1,000 bank ce it. Write at once for full explanation and details about my free Secret Service course, free Secret Service reports and special low price. (fer is limited. Write at once. No obligation. S. SCHOOL OF FINGER PRINTS, Dept.A135, 7003 N. Clark St., Chicago. e R E Your skin can be quickly cleared of Pimples, Blackheads, Acne Eruptions on the face or body, Enlarged Pores, Oily or Shiny Skin. $1,000.00 Cold Cash says § can clear your skin of the above blemishes. WRITE TODAY for my FREE Booklet—*‘A Clear-Tone Skim —telling how I cured myself afte? being afflicted for fifteen yeat® | ff E-S.GIVENS, 128 Chemical Bldg., Kansas Cily, Mo.

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POPULAR MECHANICS ADVERTISING SECTION L 1 _ Com- W orld, - — aining. If k f . 3 practical -n . ation with » 4 3 s . ng | and gselig sate Ry Es aga P <a" instructors own Organ- e between ial Artisa ually open tion, any School, she leading ere in the land or m pany “y our of our cents ™ Be an expert auto repair man. You can have the skill that makes every complicated trouble as easy to fix as taking out a spark plug. Learn every detail of all makes of cars and trucks. Know exactly how to find what’s wrong and how to make all repairs quickly. These great new Auto Books show you how. Make Money Repairing Autos ¥ Over 9 million cars are in operation and thousands of men are needed to keep them in good going condition. There are more jobs open than re are good men to fillthem. Never before have expert auto repair n been in such great demand and made so much money. Now is ir great money-earning opportunity in the auto repair business. ry mechanic, every chauffeur, every car owner needs this great New Library of Automobile Engineering. ious eces| “@ooc a Week Explosion Motors, If You Decide to Buy

| Welding, Motor Con- | struction and Repair, Carburetors and Set- tings, Valves, Coo'ing, Lubrication, Fly- Wheels, Clutch Trans- es a ail diately s. i will

mission, Final Drive, Stee: ing Frames, Tires, Vulcanizing, Ignition, Starting and Lighting | Systems, Shop Kinks, Public Garage Design, Equipment and Opera- ation, Electrics, Stor- age Batteries — Care and Repair, SteamCars, Motorcycles, Commer- | cial Tracks, Glossary, |More than 100 blue | prints Wir’g Diagrams.

Wht DPE Br A Bete Uae AN ew eer Ta ae ¢ Let us send you the complete six-vol- ume set of Automobile Engineering for one week’s examination. Read the simple directions for repairing every automobiletrouble. Six thick volumes 5!5x 834 inches, flexibly bound and stamped in gold, 2,650 pages, 2,100 illustrations, wiring diagrams, etc. Everything in plain, every-day language simple to understand. If you decide to keep them, send only $2.80 in seven davs, and $3 a month thereefteruntilthe special introductory price of $21.80 has been paid. The regular . Price is $45.00, so you save $23.20 by acting at once. Send No Money Don’t senda penny! Your name and * address in the coupon brings the six books to you at once for seven days’ trial. Mail Coupon NOW . . - +o American Technical Society + Dept. AI9A_ Chicago, U. S. A. , \ 4 { e sen rk Iw r ex pense 7 nd me a rece AMERICAN TECHNICAL SOCIETY Dept. AISA Chicago, U.S.A. Please send me the six-volume set of Automobile Engineering for seven days’ examination, shipping If 1 decide to buy, 80 within seven days at $3.00 a month until en paid, Then you will ipt showing that the set oks are mine and fully paid for. If k lean get along without the books, eturn them, after 7 d , at your

Page 202

POPULAR MECHANICS ADVERTISING SECTION

Electricity Moods Yo I WILL TRAIN YOU AT HOME Stop right here. Business is in for a tremendous increase. This is YOUR opportunity! Electricity is calling you, and the Electrical But it needs more trained men—at big pay. By my Home Study Course in Practical Electricity I can train you for these positions. Earn $70 to $200 a Week You’ve always had a liking for Electricity and a hankering to do electrical jobs. Now is the time to develop that talent; there’s big money in it. Even if you don’t know anything at all about Electricity you can quickly grasp it by my up-to-date, practical method of teaching. You will find it intensely interest- ing and highly profitable. I've trained and started hundreds of men in the Electrical Business, men who have made big successes. YOU CAN ALSO Be a Big Paid ELECTRICAL EXPERT What are you doing to prepare yourself for a real success? At the rate you are going where will you be in ten years from now? Have you the specialized tzain- ing that will put you on the road to success? Have you ambition enough to prepare for success, and get it? You have the ambition and I will give you the training, so get busy. I am offering you success and all that goes with it. Will you take it? I'll make youan ELECTRICAL EXPERT. I will train you as you should be trained. I will give you the benefit of my advice and 20 years of engineering experience and help you in every way to the biggest, possible success. CHIEF ENGINEER ‘ Valuable Book Free ‘yb ‘, Become an Electrical Expert,” has started many a Chicago ‘Sagieening the way to fortune. I will send a == 4, man on Dept. 1-2, 2150 LawrenceAv. % COPY: free and prepaid, to every person answer- ee , ‘, ing this advertisement. CHICAGO, ILL. ‘, Act Now! Good intentions never Dear Sir: You may send me entirely free and fully prep aid, a \ get you any Ww here. py rf ye pod gl ‘How ae Senet me %\ It is action, alone, that counts. NOW IS in ectrica xpert, and particu- ’ rie Aa bs Aiea b wh lars about your Home Study Course % THE TIME TO ACT. in Electricity, L. L. COOKE, Chief Engineer CHICAGO ENGINEERING WORKS , 2150 LAWRENCE AVENUE ‘Dept. l-a Chicago, U.S. A. «

My book,

FREE! BIG ELECTRICAL OUTFIT A fine outfit of | Tools, Instrume nt als, etc , absolute every student. I v you FREE and f —Proof Lessons to how easily you < Electricity and ¢ splendid professiot new, revised and or tem of Training by Radio Course FREE! : surse wort wa free. k i when you mal ce Earn Money While Learning I give you something use now. Early in! Study Course | how to begin maki in Electricity, and ! get started No ne until the whole cour pleted Meadeade of have made several t cost of their course time work while lk Home

Page 203

POPULAR MECHANICS ADVERTISING SECTION “@ACLASSIFIED ADVERTISEMENTS | WORLD’S BEST WANT AD MEDIUM ‘ Advertisements in this section, 25 ‘cents per word, each insertion, minimum 10 words, payable in advance. To be inserted under proper classification in July issue, copy should be in our office May 25th.

ADVERTISING AGENCIES SILENT ‘Timing Gears is what you REPAIRING Ford Cars, Trucks and need to take the rattle out of your motor. Tractors in the most proper and efficient agents or salesmen or for Money back if not satisfied Auto Tire way is explained in a new 229-page book s and reaching investors, use | & Parts Co., Cape Girardeau, Mo, by the former director of the Ford Motor t) ads in largest newspapers PRONTO Series Gap Spark plugs. Guar- | Co. Service School This information is Price list No. 30 sent anteed Life of Motor and to shoot through otherwise unavailable outside of the Ford Advertising Agency, 20 W. | oil. No porcelain. All mica. 100% Goy- | plant Written more especially for the Chicago, Ill, The largest | ernment test. Particulars gladly furnished. mechanic and repairman Price $2 post- tising agency in the U. 8. Pronto Mfg. Co., Omaha, Nebr, paid. Popular Mechanics Book Dept., 200

8-HOUR Battery Charging with Con- | ©. Ontario St., Chicago

TISERS entis aw > Remm ~ — roe a = ee 7 —. pe oe PATENTS—Write for our free illustrated - Sal “Tes > + ga roms fay. ostal brings de- | Guide Book and Evidence of Conception sUKN, Hicksville, Ohio: Plans, tails Hobartseo, Troy, Ohio. Blank. Send jel atch 4 dese for Advertising copy, Designs ; ; ; ank. Send model or sketch and descrip- State wants Sketches free. AUTOMATIC Air Compressor, quietest, tion of your invention and we will give our ng a —— s . . most compact outfit on market. No noisy opinion of its patentable nature Highest Display 100 magazines, thrice $8. breaking belts. Motor and pump one references Prompt service. Reasonable

5402 Alaska, St. Louis, Mo. unit. Thousands garages, filling stations, | terms. Victor J. Evans & Co., 185 Ninth, tire shops, using. Most economical to | Washington, D. C

H Display in 50 magazines $2.00. | operate. Absolutely dependable $35 5 Klesse, East 89th, New York. | cash, balance terms. Iron Clad satisfac~ PATENTS Procured Send sketch or RITE booklets, folders, letters, com- tion or Money-back guarantee. Write for model today for examination, prompt re- v-up for manufacturers, mail- details. Hobart Brothers, Troy, Ohio. port ar" ~~ cbarge, for pie: jealers, Long experience. Write for STANLEY, Steamer Owner - 7 | inary advice rite for free 0k let L. Taylor, Box 44, Freeport, IIL Acme Boilers, Burners, ‘vaporisers, omer and blank form on which to disclose your

— . ° ~ . idea. Highest references. Promptness as- VERTISE in 24 Big Sunday Newspa- | heaters; everything for your Steam Auto- | cured. Clarence A. O’Brien, Registered

“lectrie: ms. 25 words $15.00, Catalog listing 1,000 | Mobiles. “‘Doc’’ Paine, 1238 Santa Fe, | pate vawyer, 562 Souther Suilding, ctrical , Dailies, Weeklies, Magazines, 4c | Denver, Colo. Wasting Cc —s pay. ~ , n Advertising, Baltimore AUTOMOBILE Parts. All cars and — = Chicago. trucks, motor parts, clutch parts, uni- DYKE’S Automobile Encyclopedia 13th ns, versal joints, axle shafts, gears, ball, rol- edition, new, greater than ever, entirely AUTOMOBILE SUPPLIES ler, and thrust bearings, timing chains | rewritten and rearranged. Contains great-

and gears. State make, model and parts est array of automobile facts ever pub- wanted. Special prices. All new parts. lished in one volume. Separate books con- In stock, Merrin Motor Parts Co., 1728 | taining same information cost $21. Over Michigan Ave., Chicago, Ill. 1,200 pages and 4,100 illus. Cloth $6

MR. RADIATOR Repair Man, why pay prices for radiator cores when you can

tor core equipment and make

mn t We make radiator core AUTOMOBILE Parts tsed parts for Flex. Amer. Morocco $7.50 postpaid Pop- e s, lock seamers, cutoff shears, ad- most any car at half factery list prices. ular Mechanics Book Dept., 200 E, On- ping frames, radiator test Allen, Briscoe, Buick, Cadillac, Chalmers, tario St., Chicago.

‘Write for details to Radiator | Chevrolet, Dodge, Dort, Grant, Hudson, ring Co., 626 Nesslewood Ave., | Hupmobile, Oakland, Overland, Oldsmobile, Ohio Reo, Studebaker and many others. Send FOR FORD OWNERS —— list of parts wanted. Maxwell Bros., 4106 WE buy sell anything. Simon Sup- Olive St., St. Louis, Mo. ly Company, St. Louis, Mo Ph ee ae parts, guaranteed new for GUARANTEED Non-Corrosive Batte all cars. Save money; get our wholesale . > ralv minal. Fits any Standard Battery. Sell prices on gears, shafts and bearings. State ree. Speedster — er a onal pes pbber or Dealer, Liberal Commission. | make of car, model and parts wanted. Heads extra coed i —— Pt efti- ialty Co., Atchison, Kan. Parts shipped a eet -etesk, We | Sere. Ee Cee ee ee ata a refund your money, including transporta- | ciency, than can be had in any other irts at cut prices! All kinds | tion charges, if not satisfied. Mechanics | Eight Valve Head for Fords. Type B used, for all cars, ee Gear Co., 3708 No. Halsted St., Chicago. ay Valve — oe 7 L_. ransmissions, Axles, Radiators, SRT Y : — eg ee system on any motor ype » mos nerators, Batteries, Shafts, Ry , Pn mg I a powerful Sixteen Valve Cylinder Head 5 s Springs, etc., etc. If ine oO _ met t ad Air C a omnes : ES 2 made. Type C, fastest Cylinder Head in never known the House of War- 5 es = ompressor & Equip- | the world, carrying four carburetors, and you had better write us and get mens I nl ee Ava, Ce, special high speed camshaft. Actual speed

EIGHT Overhead Valve Cylinder Heads, complete with manifolds, plugs and wires,

Think of buying the Osgood - wanted. . test on Ford racing car with Type C Head, per pair, and rims for any AUTO parts—Save 25-90% New gears, over one hundred miles per hour We : each. Windshields from $8.00 axles, bearings, springs, radiators, magnetos | will double the pulling power of your Ford $ Spotlights $1.75, Welding out- —4,000 models. Bankrupt supplies, retop- truck and insure you 2-ton truck instead it a low price. Specify make and ping outfits. Brightman Auto Exchange, of l-ton truck, For touring cars, hill | of car when writing. Warshawsky 321 Windsor Ave., Hartford, Conn. Largest | climbing and road service beyond the 1935 8. State St., Chicago, Il. in the East. wildest a! of the — , Lar - — — = 7 “ > ~o manufacturer of power and speed special- dW. 4 Tacks and save $25.00, See aac nak teins tr tet ae ties in the world Doing business in __ page’ 13 most popular motor magazine. Contains | fifty foreign countries and every state in PROTECT your rights—Write for ‘‘Record helpful articles on overhauling, repairing, | the Union No matter what you want

and booklet about Patents. ignition, carburetors, batteries, etc. Auto- | in power and speed specialties, “_ = sonal service. Advice without | mobile Digest, 505 Butler Bldg., Cincinnati. If | are inte we > - <n py . my ‘ Y r . Bt Oa . =. - - - " - underslinging arts, high speed camsha ° be ow Pe ae o. — PRONTO Series Gap Mica Spark Plugs. water acre lk raters, roller bearings, shock : C. enewee. Guaranteed life of motor. Positively shoots | aicorbers, steering device, wire wheels, ET ow you how to save 30% of through oil. 100% Government Air Mail | gairic or cord tires, counterbalances for

Send your name and ad- Service test. Real dealers and distributors | orankshaft or single-piece counterbal- do the rest. Southwestern | Write. Pronto Mfg. Co., Omaha, Neb anced crankshaft, one solid forging, worm ratories, Oklahoma City, U, USED parts for Dodge Brothers Cars and gear steering gears, nickel steel rac : al 50% from list. Satisfaction Guaranteed. ing gears, any ratio, Ford replacement HAN KAN” Portable Commode, | Harris Motor Car Company, Cape Girardeau, | gears, carburetors for speed or gen ral rem¢ e waxed paper lining. Patent Mo. service, power and speed pistons, _sripte- Indispensable to the motorist. MAGNETO Recharger; State Rights free. | lite connecting rods, 2, 4, and 6 forward - ren or adults, Price $6.00. Send | State Distributors, Reliable, 328 Jay St., | speed transmissions, high tension magne- Henry P. Jones, 41 Arkansas | Utica, N. Y. tos, racing bodies, pressure feed oiling ff ee systems, large capacity radiators oil

OUR Tr — oe IN . a — — pumps, safety goggles, racing helmets, 100- NOlK Battery Charging with Constant | Cleaner on the market. ees GeUe mile speedometers, stop watches, vacuum | Pays Big. Easy Payments. | file, all in one. % and % A. C., Cham- | tanks wheel discs, pressure feed gas sys- Pay Postal brings details. Ho- | Pion and others of like type. Dealers | t. ‘then you need our folders A pos- La)

= 0 wanted. Frederick Wamback, Greenwich, | +.) card brings you the great money- D ts. for Dodge, Dort, Maxwell Conn. saving power and specialty folders We Oldsmobile, Oakland, Allen, want an agent in every city and town in ‘tudebaker, Case, Hupmobile, AUTOMOBILES America If you own a fT ord car wr te Ford. 50 to 75% from list. : for our special agency proposition, It will I & Parts Co., Cape Girardeau AUTOMOBILE owners, garagemen, me- | surely interest you and increase your bank ) 4 chanics, send today for free copy America’s account this year Write today Address =r TM : most popular motor magazine ( ontair 8 Laurel Motors Corporation Anderson Ind Mastos ‘ER'S Parts—State year, etc helpful articles on overhauling, repairing Po vl 8 Prospect Place, Somerville, ignition, carburetors, batteries, etc Auto- DRIVE 100 Tacks and save $2 ) See

mobile Digest, 506 Butler Bldg., Cincinnati. | advertisement, page 134

Page 204

, BOOKS AND MOTORCYCLES, BICYCLES AND SUPPLIES ETRE. pe - od | zz

Page 205

POPULAR MECHANICS ADVERTISING SECTION coNCRET Handbook, New, for the EVERYTHING In Magic, Four Catalogs STAMPS, 50 Varieties, Africa, Brazil, , WW ive just published a book | 15c. Gilmagico, Morgan Park, IIL. ta Cuba, Mexico, etc., 10c. 50 different ways of using concrete in en S., 25¢; 1,000 mixed, 40c; 1,000 hinges, and on the farm, with full FREE—Our Catalog of Puzzles, Tricks, Loe. List free. CC, Stegman, 5948 Cote doing these things your- Games, Jokes, Novelties. Wright & Son, Brilliante, St. Louis, Mo iry tools. 138 illustrations, | 601-G Ind. Ave., Peoria, Ill. - o you can understand it.” 100 FOREIGN Stamps free to honest , postpaid. Popular Me- approval applicants. Address J. A. F Dept., 200 E. Ontario St., STAMP COLLECTING ten, Fertile, Minn. 200 , ay New Europe, mostly Alcohol. Wright’s book oF ‘i =—_ si unused, including Czecho-Slovakia, Dan- Full directions for mak- 50 DIFFERENT United States 10c; 10] zig, Latvia, Ukrainia, Airplames, etc., ngs of necessary apparatus. | Nyassa 1901 25c. Seidenberg, Merton, Wis. pomoste a 12e to new applicants for Spon & Chamberlain, 120 "NITE > : enway Net at “Ask any boy Street, New York, N. Y. mm a oe ae $1.00; who’s had them Address, aS a S ' ye orem ‘4 nges, per! Stamp Co., Box 84, Fenway Station Poultry Houses. All styles. | Package 15c, Approvals. First Class Ref- | poston, Mass ° ns; secret of getting winter | erences or Cash Deposit Required. C. - of ‘The Full Egg Basket.” | Osborn, 486 Park Ave., Weehawken, N. J. cents. Inland Poultry Journal, Indianapolis, Ind, la- LIKE Triangular Stamps? To introduce BEST _one-cent approvals in America, oe tae ae ee a oom ae Me ayes. 1117 So, 60th St., Phila- | $100 United States revenue, also packet deiphia, Pa. 50 Sessten. muiteectse >. pan PICTURES AND POSTCARDS START a Stamp Collection—70 different | $@U8e, Tuler and bargain lists for only 9c stamps from 70 different foreign countries, in A _—— ts Dept. P, Fuller- including Africa, Asia, Australia, Europe, s nome _ self as ‘others see you—Photo | West Indies, ete. Our pamphlet which tells 158 GENUINE Foreign 65c. Send Photo, Suc- [| ‘‘How to make a collection properly,” and | War Issues. Venezuela, Salvador and India pany, Cumberland Gap, Tenn, | price list of albums, packets and sets, all Service. Guatemala, China, etc., only 1l0c. - : for only 16 cents. Queen City Stamp Co., | Finest approval sheets 50 to 60%. Agents Postcard Club, Membership | Room 36, 604 Race St., Cincinnati, 0. Wanted. Big i*2 Lists Free. We Buy ling Catalog, 10c. Harvey = Stamps. Estab. 5 yrs. Hussman Stamp itur, Ind. TRY my Hi-grade Approvals. One cent | Co., Dept, 54, St. Louis, Mo each—Worth it! Premiums free! Ulric - 7 Childress, Winthrop, Mass. UNIVERSAL Packet, 100 varieties, all e over worlc c 39 NOVELTIES, CURIOS, ETC 100 RARE and valuable foreign stamps, ie beheten n'y. a _ all ae and big catalog, 7c. Stan- . VARID - ARTISTIC name cards, samples 10¢ ton, Niantic, Conn. ARIETIES Cuban stamps, 10 cents. iglver). Prince, 130 W. 104th, New York. : 4 enh t ae na ae list ten —_ , AK! hambers “Stamp Con LilP, Nessa —- 0 those as or % discount approvals. St., New ork Ci . J MOON es Re K. C. Stamp Co., 838 Lee Bldg., Kansas —— Ls vy St. Lawrence Ave Bronx City, Mo. FREE! Sectional Loose Leaf Postage ; ds, oa ° Stamp Album at the rate of 8 pages each Y PACKETS—100 diff. stamps, 8c; 200, | month given with subscription to our 18c; 500, 75c; 1,000, $1.40; 100 diff. | monthly Journal. Send two-cent stamp for Hungary, 15c; 30 Greece, 23c; 300 New prospectus, United Stamp Co., 140 8. GAMES AND ENTERTAINMENTS Europe, 48c. Set of stamps free to_ap- | Dearborn St., Chicago, II! proval applicants sending reference. Yon- kers Exchange, Yonkers, N. Y. STAMPS. 20 unused, all different, free , ; . . Postage 2c. Mention paper. Quaker Stamp FOR Your Lawn, Country Club. Neal FREE, Dollar Stamp Free to applicants | Co., Toledo, 0. . Oeucle Golf, Paris, Maine. a ~~ 60% . —“ g Norman Shultz. Tr er : . "Is . Olorado Springs, Colo. wo. ST of 23 stamps, no two countries ee a ee yy *- ~~ ar alike Packet hinges, Set of $1 and $2 se pestionions aad proof George W MONTENEGRO, 1907, complete set, 12 U. S&S. Rev., all for 5¢. Mention paper. oom M-737, 125 N. Jefferson Ave., varieties only, 15c, or 1910 set, 12 varie- | Miami | wl Co, Toledo, Ohie. _ vee Saw ae ' ** | ties for 30¢. Finest selections on ap- proval only on request. B. L. Voorhees, 20 UNUSED _stamps free. All different. i KINDS Iron, wood and wire puzzles. 25 N. Dearborn: St., Chicago. Postage, 2c, Fisk Stamps, Toledo, Ohio. sid illustrated list 10c, Western STAMPS sent on a 5 CHINA, etc., st dict! list ST: S s pproval at 70% dis- 105 NA, etc., stamp onary, list, Pal Works, St, Paul, Minn. count. Reference required. Emory Renoll, | 2c. Album (500 illustrations), 3c. Bullard, Hanover, Pa. Sta. A, Boston. Stamps Mexico 18. UNIVERSAL Pack 100 varieties, all FRENCH Colonies Free—Beautiful Pic- WAGIC TRICKS, BOOKS AND JOKERS’ | over the world, 10 > Goveh Stamp, | ture set, including Native Chiefs, Tigers, NOVELTIES 39 State, Rochester, N. Y. Pictorials, 2c Postage. Empire Stamp Com- pany, Toronto, Canada. oe DIFFERENT ie English, FOREIGN St Gelleathon . Fr RYSTAL ring “ts. Inte : rench. German, Canadian, cheap un- eR . “GN Stamp Collec Sen ee. ws M ‘eal Cant Tricks, Novelties, used European, ten cents, R. Lehr, 1300 | Cornish Company, Schenectady, Y. Illusions, oe ariainment sods. Foulkrod St., Philadelphia, Pa. ; BIG Variety Packet Forelga 8 ps free tec : FREE—Fifty Different Neurope to Ap- or 2c postage. ray Stamp Co., Stati: Write today. Menmey Saale Oa. Dorin. roval Applicants. Postage 2c. 1,000 | E., Toronto, Canada. — y “° . inges, 10¢, Sunflower Stamp Company, PPROVALS Be er Will ~ Hutchinson, Kan. gs API ri ae. ¥~ Nes oy = Cite JOKERS’ novelties Greatest fun mak- ZAMBESIA, Zanzibar, Abyssinia, Her- i —o se M+ : ar +. ; ‘ atalog for stamp. ’ Cc. zegovina, Alienstein Stamps, Menagerie R STAMPS F ree—War Stamps, ow Jefferson, Louisville, Ky. collection, hinges 10¢. Liberty, 3974 Unused, Pictorials, British, a G 0 —_—-_ . , . , 9 7, > gucic Disappearing Writing Pad. You | Arsenal, St, Louis, Mo. nials, 2c postage. Midland Stamp Co., ply writ thi i the ¢ Toronto, Canada. nme tea SS APPROVALS! % catalog. Rare Hayti pad; then lift: Presto! the ‘ ° onl, pirgeaas*. | $2.00; 500, 75c; 325, shes. Mystify your friends. emma, A ee te, sppmcanta, Penna. 25¢. Onken, ‘630° 79th rice 25 cents postpaid. = Mechanics Book Dept., 200 EK. NEW Roumanian “Coronation Issue” (5 , Chicago. varieties) 15 cents. Sets, Singles on ap- Ti ROP AN Novelty. ‘See Lola dance.” Sg F. Buffham, Lake Ave., Racine, mp ) Schaefer Novelty Co., New- ~~ man Stern Biag., Cleveland, Ohio. FREE! _ World’s smallest soo PAPER Magic—A new book by Houdini rovals, Postage 2c. Cannon, 1414 Carey, RARE COINS & which not only a large avenport, Towa. ' tricks with paper but also the 300 DIFFERENT Stamps, 25c; 200— and puzzling articles which ma k f ‘ 7 $2 TO $500 each paid for hundreds of folded paper and tearing ot 160. Micheal, 6008 _ Prairie, Cbicage. Old Coins. Keep all Odd or Old money ‘wer Puzzles are also inchided. 105 DIFFERENT stamps, including Ger- | It may be very valuable. Send 10c for Illus. Price $2.50 postpaid. | man airplane, Fiume, Danzig, Ukrainia, | New Illustrated Coin Value Book, 4x6 hanies Book Dept., 200 B.'| and approvals 10c. James Musick, 4440 | Get posted. We pay cash. = a 2 Clarke Chicago, Natural Bridge, St. Louis, Mo, Coin Co., Ave. 2, Le Roy, N. _ Puzzles, jokes, magical appara- $3.00 FOR 12c!! 100 different Neu- 40 OLD coins, all different, $1.00. 39 Stage supplies, mind-reading, rope, catalogued $2.10; triangle stamp, Large U. 8S. Cents, all Different Dates, escapes. 160-page illustrated | red-cross set, airplane set, perforation | $2.25: 20 old Bills, all Different, $1.00 _Catalog, 10c. Oaks Magical | gauge, millimetre scale, fine wallet, 5 ap- List Free. Claud Denney, Box 315, Dal- t 18, Oshkosh, Wis. peeves _sasete, 250 = hinges, sranee, YS las, Texas. 7 ol Nyassa, byss , ete, price lists — = AMAZE ind Mystify your friends! New | = tn “he 1201! Atlanta THREE old coins 10c; coins bought ies agile Book tells how—explains 33 | Stamp Co., Box 532, Atlanta, Ga. Durso, 25 Mulberry, N. Y. City Effects. Sent with Catalogue of . ind Novelties, only 6c, Write TEDDY ROOSEVELT, 5c Blue ; also 50 100,000 ROUBLES 25¢,_ 10,000 German Douglas, Station A, Dallas, | different French Colonials for 20c. Jacob | Marks $1.00. Craig Dare, 440-55th, Fischer, 1539 North Lawler, Chicago. Brooklyn, N. Y. Sercet, "Teeckion, FREE—50 varieties or set to approval applicants sending 2c 500 different 69c. Richard P, Lamoprecht, Valparaiso, Ind.

Page 206

POPULAR MECHANICS ADVERTISING SECTION MAKE money with your camera Li ster! Box 967, Los Angeles, Calif — ——— —— | Instr FILMS each; Prints each Any B ize Une hand-tinted Free with each ~ ler A\zulykem, Bristol Vt SHOW you know ater ae — " - ible pr $100.00 cash HAVE You a Camera Write or Free as well as | Samy of our big magazine, showir hov We | t make better pictures and earn money American Photography, 790 Camera House, Boston 17, if \ ass MOTION PICTURES THEATRE Supplies Picture Ma Ope Chairs Carbons te Send for 4 ra 2 Raj FOR REMARKABI Professiona BOYS Mazda I lantie BOOKS Book fi Cc} tere A wonde hints suc INVENTORS SCENERY TO RENT WRITE | r SETTINGS for Opera, Plays, Minstrels. | |.” (te branches Drops, Address Amelia Grain, Phila- branches | delphia 00.00 Write for pat’ | EDUCATIONAL AND INSTRUCTION | STUDY Bacteriology, Hygiene, Public Healt Laboratory technolo ! good ncome Interesting our sts make ifse mastered t 1 or school montl j ir Art a : " . 1n¢} CARD [PEZEZZESTE

Page 207

POPULAR MECHANICS ADVERTISING SECTION ICS taught by mail. Arith- TRADE SCHOOLS FREE Book. Start little Mail Order here. Home employment eve- ers Working Outfit furnished. 00 circulars, samples, things deal direct with manufac- stock to carry. Instructive Pier. 238-A, 74 Cortlend Geometry, Mensuration, business anyw Logarithms, and Mechanics’ i nings. Beginn ing School, 76 Brighton, LEARN Modern Barbering. It pays. | Instruction, 5 Mich Clean—care-free—short course. Can travel, to sell. You see the World, or be your own boss. Will | turers. No ional books sold, rented, equip shop on payments. We have 33 took = free

inged, Bargain list free. | branches. There is one near you. Write | Street, New York. ‘isgah, Ala, any address below for booklet B, telling

— all, (You do n e street address.) RABBITS 1 vay if kept right Rab nvent for Profit’ free. Pat- Moler System ; ‘ges, New York City, craft shows you how. Send 50 cents Vashington, Chicago, Ills., St. Louis, Mo., Kansas | 12 months’ s = City, Mo., Cincinnati, O., Cleveland, hook ‘‘How educational matter etroit, Mich., New Orleans, La., Atlé Sample copy I List 1,000 items Ga., Memphis, Tenn., Milwaukee, ’ Lamoni, lowa ubscription and receive to Sell Dressed Ka free. Rabbitcraft, Box

Exchange, 47-A West Omaha, Neb., Denver, Col.: Dallas, - New York, N, Y¥. Worth, San Antonio, Houston, Texas, LABORATO Toronto, Ont., Canada. mand, We t

LET Us Place You in a Position to sion and resi TELEGRAPHY earn from $10 to $15 per day. We make | °%Y. Microbio an expert painter of you in a few weeks, | Taught by cl better than if you went to work in a No prelimina

HY—Both Morse and roughly and quickly Tre- nd Big salaries Wonder- S. Expenses low; chance West Austin Avenue, Chicago Pperts needed School established fifty 7 : member free Dodge’s Institute, to $500 a me Pictorial, Auto Painting, Decorating, profession of

Wire regular shop Practical training in Sign, mas and degrees granted RY Scientists are in each you quickly and oughly and help secure positions Ex dential courses in Bacteriol logy and Sanitary Scic: ear, concise, simple metly ry training needed Diplo- The fascinating Laboratory Scientist is rec- Paperhanging, Graining, Marbling. Cata- | ognized in business, detection of crime, logue Free Chicago Painting School, 148 disease prevention and cure, More daily Become respected of growing profession. Earn $250 now nth Students enrolling iiso, Ind. BUSINESS OPPORTUNITIES will receive 48-piece Urinalysis outfit solutely free

CAPABLE men wanted to open branch Microbiology, RADIO OUTFITS AND SUPPLIES office and manage salesmen. $300 to] nue, Chicago. $1,000 necessary; handle your own money. Send for free prospectu day. Physicians and Surgeons Coll Suite 971, 550 Garfield Ave-

° ' 3 ae 603 N. Eutaw St., Baltimore, Md. for pups. Ge Is any size, %, inch Ile N.B

Possibilities unlimited Address Manager, RAISE Silver Foxes.

delivered. Ohio Comb Co., STOP Working for Wages Immediately. 0 Trouslot, Box 1272, San Francisco. START Automobile

1 crystal Synthetic crystal | ing advertised food product. Exclusive detector tive over its entire surface. | license your city Lite Lunch Co., 220 SWIMMING Propeliers; season now inior clearness and volume. Price | No, State St., Chicago. Any body can build and sell; large

1 ie Rusonite, 14-Karat profits, Send t Cat-whisker. Price, 25e. BIG Money in Radio. Thousands of tions. Novelt Rusonite Products Corpora- | men needed in fastest growing industry. Chicago 25c for plans and instruc- y Wks., 822 W. 35th

Row, New York. Best positions go to men holding Govern- STOP H ment License in Radio. ‘Easy to qualify ~ nse

—If you have $500 available t “Fishing” Record. Ex- | for this at home in spare time. Write | YOU cam make $288 a week clear o operators have found a | for Free Book on radio. Describes bigger — oo in keeping permanent rec- | opportunities in Radio; tells how you can ion — stric “catches.” White & Wyck- | easily qualify for them. Address National fixed investment of any kind. Operates : 1 or spare time. A_ business Washincton, D. C proposition that will bear close investica- Radio Record is the ideal | Radio Institute, Dept. M-3. 1345 Penn- | ®™ywhere. Al It tells at a glance the | sylvania Ave., N. W., tio H m, ownership, wave length, ~~ a

own money. New propo- ‘tly legitimate — requires send today for proof find. The sheets are per- OPPORTUNITY to start lucrative busi- details. Address Balba Corporation, can be taken from any part | ness, little capital, Write Dept. M, Paul ledo, Ohio

without disturbing the others. Kaye, 149 Broadway, New York. DEPENDAI Handy Radio Record and keep - Capital quick nt and systematic record of MAKE Big Money—Very small invest- , -

3LE Solution for Raising ly, economically, successfully Outline propositi » results. At your dealer’s or | ment, large profits, permanent business, e proposition fully for valuable page free boo ert S. Hansel for 5 pads of 50 sheets each, no experience needed Act at once. El- postpaid anywhere on receipt 0-Viso Greasing System, 722 Wall S&t., mit by check, cash or money | Wichita Falls, Texas k, “There is a Way.” R . Financing Specialist, Dept. 501, Fourth Avenue, Pittsburgh, Pa

» & Wyckoff Mfg. Co., Makers ~ ~ LEARN at us Autocrat Stationery, 110 LEARN how to make a real success in claities. Mew Holyoke, Mass ‘ the mail order business. Send stamped | clean vars envelope for free particulars. H. John- Start your ov ir own Radiophone, Instruc- | son, 5428 Wells St., Chicago, TIl.

home, make automohil Tops; Repaint, Retrim, Endorsed by trade exper wn shop—we teach you |! Autorenuco, Sheboygan, Wisc

cents. Radio Service Inst., . Bldg., Washington, D. C. START a pressing, cleaning and dye- SEND : ing shop; excellent field, splendid profits. that brings Solder Iron $1.50. Circu- | We tell you’ how Write for booklet. nam, 63 Cour

for paying mail order ; big money quickly B t St., Room 1, Boston, M:

David Simon, 4927 Fountain, | Ben-VYonde System, Dept. C, Charlotte, x & BIG opport

Vacuu Tube Receive MAKE money! Start mail business. formula, 50 205 ; = ile Pa. — 20 Gilt-Edged Plans’ Free Wolverine Lawrence Ave eet ns . - . Bureau, 491 Washington, Muskegon, Mich,

unity Start in business yourself make and sell mosquito lo Gray & Bretey, 146 >, Bronx, N. Y

plete price list of radio CHEMICAL Aitken Radio Co., 504 Su- Expert furnishes mar WHY not sell us your spare time? $1.00 | turing formulas with complete workir do, Ohio | per hour. $9.85 Daily easy for full time rections, resulting products possessing introducing New Style Guaranteed Hos- tinct individ o Golf and get a new pleas- iery—57 styles, 17 colors No capital | perfected A your Receiving Set Our | experience required Just write orders. less stock f

iality and merit Pr ll Lines No lists of rmulas Correspondence itfit will enable you to keep We deliver and collect Your pay daily, vited Dr. Arthur VanHeeden, 508 day by day of the num- also monthly bonus Free auto offer Oakley Boul vard, Chicage

s you hear and the total sides. Complete outfit furnished les they represent away from | COlors-grades, including — silks Mac I MADE oe 6 Week Home. also helps you to see how | Chee Mills Co., Desk 2586, Cincinnati, peng 4 ng is improved Send $1.00 Ohio. sooklet tells years’ experience Ashbrook, 67, Mareng

entire outfit will be shipped EARN $10 daily silvering mirrors, plat- PATENTS rn mail Money refunded if F , lel t ; , - ing an finishing etalware model today 3 Radio Get Association and sre 1ing metalware, autos, I = (ne Woaskiesten we a chandeliers, bedsteads, headlights. Outfits | Pott and advice No charge fo 32, Washington, ;

furnished E Decie Laboratories, 1133 — aay : i . blan it new discovery, The Des- Broadway, New York City em a Whisker, improves your set VE a 2 fa? ad : eents for set of two and wun" E you found your place in life? sured Clare new 300 mile Mars Radio : i a . et raat -- ving Set. Address, Millicn | S>!ilities. Ac<ress Robert Knox, Box 728, | Washington,

Procured Send sket for examination rom] r pre! Write for free Booklet on which to_ disclose t references *romptness nee A O’Brien, Regist for free circular on misdirected Patent Lawyer, 561 Southern suilding dD. C

“ ° Se ‘rancise ‘ali Service, Box 822,’ Needles, an _Prencece, Colt PREPARE CORPORATIONS 1 orcanized, security is- ‘ormulas, tr nerative Tuner Li- sues formulated rspectuses prepared - ; sietlar ". - ei f moderate fee < & Co., 347 5th shit n - a tas = , Ave., New York y — ' ' i Stace EEE ee = . atalog 10c, Address, PUBLISH Magazine of Your Own your cvs Start Mail Order Business and Advertis- ter al F Transmitter Button ing Agency on $1 Capital Sample Pian, nsur

plification Loud Speakers . tric Co., 15 Park HOW To Organize, Fins » Company. Write Box 617, Schenectady, N. Y. cinnati, Ohio.

Sell Your Own nde secrets, italog free. Cc ATTENTION!! You cat f Establish and ‘state Business, brokera irar ney in your communit l0e Harvey Teeple, Decatur, Ind al ome Karn $5,000 year Repres everywhere Send star Realty Associat

free I pay $200 to $500 vrald F. Todd, St. Stephen, Painting, Plating, etc. Profitable plans Free. Rorick, BUSONITE multipoint crystal rectifier. WE start you in business manufactur- Carroll St., Akron, Ohio

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POPULAR MECHANICS ADVERTISING SECTION FORMULAS erating 1 ly Factories ar ilfetime booKiet free Drawer 4, East Ora MODEKN Photography ré ! now taught by mail hod : ea Ttu tad 2 Interr 1 Michigan Ave., ¢ DOLLARS yearly in you Muslhireom lope Particulars fr 31 East 89th, New York, N r backyard START in Business. Sampk l5e. Cochran, Graysville, Ohi CHEMICAL E and Trade Secre W L. Cummings Syracuse N Y a ticulars abin K. Eld r Man,’’ Brownsville ~ EXCEPTIONAL fanager writ apable of handling sta Marve is new Adding Mact 15 Work equals $350 ma 1 bilities 1 ~ “WHAT t Ne ‘ 4 ~ LEARN ar cee Ke r New Pilar e, 502 SI MARBLI wo ORANGEADE water—most cle tasted dances m 5 gla HEMER AGENTS WANT Ww AUTOMATI( re 4 Your t ness at a $3.00 for all Rohner, Box INCORPORATE n law any I ling Chica TURE Extracts MANUPFA€ essit 0K profit we a Shop, -MI

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POPULAR MECHANICS ADVERTISING SECTION Klean- Washes T—Whirlwind Seller ishing Discovery. rubbing Women throw Write Quick for Free Offer. Bestever Prod- Irving Park, Chicago. ial Kb is Manufacturer offers big men and women agents ii and personal comfort te Manufacturer, American ts Company, Dept. 608, Distributors, Energetic Men $10 daily handling the a new household necessity; to homes, dressmaking and hments. Be first; get this put out sub-agents. Oppor- e HyKon Mfg. Co., Alli- TRAIT and Medallion Agents—Our ge Make You Big Profits; de- ed; prompt shipments; low or latest catalog Adam J. 602 Blue Island Ave., 0) Profit—Cost You $1.50. i Monogramming Outfit. Instantly on Automobiles, Windows Experience Un- Ire Samples. NuLife (A) Hartford, Conn. Men or Women sumers for Boys’ or spare time. deliver A. Allen Shoe Co., joston, Mass to take or- and Girls’ Quality Condon, 161 Sum- Start a varnish polish busi- mobile, plano owners demand Send 10¢ postage for free bot- nstrate its merit and get year- eat business. Big profits. $5 sing in your. local _ paper. 530 W. 58th, New York City. anywhere, handy with paint sht tools, can start needed mechanical business on g Mostly all profit. Ex- necessary Testimonials from from Maine to Oregon John 1457 So. Ninth, Philadelphia, SHAVE Without Razor, details free American 24, Station A, new discovery, Pharmacal Co., Cincinnati, O. A MONTH made by Mr. Burt- ng our Spices, Extracts, Soaps, for terms and territory, La- Dept. 127, St. Louis, Mo rometer that reads in irate to the thousandths fifty-dollar set Sells for Agents wanted Schaap, Street, Brooklyn, N. Y with Wonder like hungry Don’t go Sweetheart or cherry glasses, Only Union Co., Barnes our big sample extracts, spices, and toilet and use daily 1d postal quick, pany, Dayton, frac- Does one 344 Fish wolves, thirsty Punches ; flavors. 30c, City, Lure. Box while De- Box Agents lowa. bite $1.00 AGENTS—Get \ffee, undry assort- big line soaps: things everything fur- Dept. A-82, Ohio Salesmen, Demonstrators, levil's own time er seller than ‘‘Zippe.’’ a thing we'd have it. Splendid i0e “Go Getter’ repeat article on ten second demonstration. hile You Watch It. Demon- ie, While others waste time laims New Discovery! Greatest Triumph of the age. It’s the Haven't room to tell our story te immediately Karam -Smith irk St., Fort Wayne, Ind. you trying to If there the NO Dull Times Selling greatest, surest and safest world today is selling Federal Pure Food Products and here is your opportunity to get into this business You can make $3,000, $5,000, $10,000 or more per year. The only limit is your ability to take care of the business. We print your name and address as distributor on every pack- age, thus making sure that you will get the thousands of dollars’ worth of repeat orders which will be sent to you. No dull times, for the people must eat and our food products are the fastest selling, sur- est and quickest repeat order-getters in the world. Sell on sight in every home where food is used—repeat orders imme- diately and every week thereafter. A real Big Business All Your Own. Every new customer adds a great deal to your weekly income. Your business once established has a market value just like a store and can be easily sold. The greatest money making opportunity of your lifetime be- cause you risk absolutely nothing as we guarantee your sales, and we will not let you fail. Remember Guaranteed! Best products, biggest sellers, surest repeat or- ders. No capital or experience is re- quired. We furnish capital and every- thing necessary for you to become a Fed- eral Distributor. Exclusive territory will be given honest men or women who will write at once asking us to send our ‘‘Suc- cess Guaranteed’’ proposition. Address, Federal Pure Food Company, Dept. A, Chicago, Il. Largest inventors of and packers of Pure Food specialties in the world. Reference, any bank, Dun or Bradstreet rating agency, Express or Rail- way Company in America THIS Is It—Fifty Fast Sellers. body needs and buys Fifty weekly easily made, B. & G. Company, Dept. 270, AGENTS— Make Ford Accessories; sales; liberal profits, them. Write today. 125 8. Jefferson S8t., SAVIQUIN Washing bor saver. Other ing repeating Knox Chemical Maine. MYSTIC Sample d 1820 N Food — The | business in the Every- Dollars Rubber Pittsburgh, Pa money big selling demand; Every Ford Stadeker Mfg. Chicago, Ill Aid specialties line for Co., Dept. popular quick needs Co., la- pay- agents. Rockland, splendid also reliable A, Writing Pad. Send 25c gents wanted B. C: Fairfield, Chicago, Ill RECORDS for Simons, 27,000 Everplay with one differ- guaranteed Phonograph Needle; new ent; cannot injure records; $10.00 daily easy. Free sample to workers Everplay, McClurg Bldg., Desk 66, Chicago AGENTS Ever-Radiant Something new and Luminous Plates, House Numbers, etc. You sell for $1.75 and make $1.45. Ten sales per day easy. Start big-paying business of your own, No experience necessary Mail card for complete money-making plans. Address Crystal Products Co., 59 Wayne St., Big Prairie, Ohio PORTRAITS, photo pillow sheet pictures, medallions, merchant's signs, water-proof and tea aprons, guar- anteed hose, toilet requisites, luminous crucifixes: catalog, 50 specialties free 30 days’ credit Jas. C, Bailey Co., Desk M-6, Chicago. TAILORING Salesmen: week selling our strictly All-Wool to-Measure Suits. You collect advance and keep them. We selling outfit in America. sive money-making features. raincoat and side-line men, time, get in touch with us Park Tailoring Co., Dept buys Name everyone Glass tops, frames, Make $75 a Made- profits. in supply finest Many exclu- Tailoring, part or full immediately. 627, Chicago 15 a day—Easy, to—Big weekly ree to every customer, Simply Beautiful 7-piece, Solid Alumi- Cutlery Set. Appeals in- deliver and collect Pay Era Mfg. Co., 803 Madison 21-N, Chicago, $ quick sales Bonus—$1.50 \“ AGENTS: $100.00 a week. tector—prevents Installed without tools. Wilson made $100.00 first week Terri- tory going fast Write at once for inter- esting money-back proposition Pelletier Tire Company, 542 W. Jackson, Chicago. 100% profit. Wonderful punctures $60.00 to new tire pro- and blow-outs, Sells on sight. VEEKLY gas-light itiful light Samples free _ Write today Dept. 482, Introducing and _ sell- burner for kerosene No chimney No Experience not Luther Mfg. Cincinnati, Ohio. WANTED—Men to plays Pleasant work, good pay, and opportunity to learn salesmanship Fine chance for advancement Send full in- formation and references to the Skat Com- pany, Hartford, Conn. dis- an put up window 39 WHY $1.00 per not sell us your spare hour $9.85 Daily full time—introducing New anteed Hosiery—57 styles, 17 capital or experience required Just write orders We deliver and collect Your pay daily, also monthly bonus Free auto offer besides Complete outfit furnished. All colors-grades, including silks Mac- O-Chee Mills Co., Desk 2566, Cincinnati, Ohio time? easy for Style Guar- colors. No TAILORING agents wanted—to sell all wool: suits tailored to order $29.50, all wool tropical worsteds two-piece suits— $19.50, Palm Beaches—$17.50 We believe this is the best and biggest value line in America for the man who believes in pleasing his customers and getting repeat business To such men we will gladly send full information about our selling plan. s Sales-manager, J. B. Simp- son, 831 W. Adams St., . Chi- cago. WORLD'S Profit Establish Mfg fastest agent's Needed in every permanent Co., 813 E. seller 300% home and store business *remier ¢ Grand Bivd., Detroit, Mich AGENTS ders for punctures mileage, out Make Insyde and any casings more service, Low priced brings four Write for Co., B-678, AGENTS new big money taking or- Tyres. Positively prevent blowouts. Double tire tire, old or new Old worn- give 3 to 5 thousand miles Use over and over again. Big demand One customer others. Big money saver terms American Accessories Cincinnati, Ohio Make $7 to $14 a day Aluminum handle Cutlery Set take orders, we deliver and collect. you daily Full or spare time, perience necessary. No capital. 1500 Sales agents, men or cover every county in the U. § enormous Write quick Jennings Mfg. (o., Dept. 1868, Dayton, Ohio MAKE money kinds plating, i lights, Brand Y silvering mirrors, knives, spoons, Outfits furnished Free International’ Laboratories, Dept. Fifth Avenue, New York. AGENTS Sell biggest sensation. different; large book let. 25, 311 New; 12,000,000 pros- pects, $12 , Free sample to workers Manager, Desk 623, McClurg Bldg., Chicago AGENTS ers and quickest Something New—fastest repeaters on earth, manent, easy profitable business. for $42 to $58 a week Address, Amer- ican Products Co., 8434 American Bldg., Cincinnati, Ohio sell- Per- AGENTS Wanted—Something New—Fire Fighter sells easily, Makes a spectacular demonstration; car owners, homes, fac- tories, stores, practically buy on _ sight. Our men make $10.00 to $50.00 a day; exclusive territory If you wish to estab- lish a business of your own with unlim- ited possibilities for making big money, write us today Fyr-Fyter Co., 103 Fyr- Fyter Bldg., Dayton, Ohio AGENTS Make $16 a day ders for Serenola Does more chines costing five times its in just like a suitcase Fully Pay you daily tig season Write for terms 162, Dayton, Ohio AGENTS—$5 to terlock guaranteed children Full line All styles No experience needed Full or Repeat orders run 90% Prompt deliv- eries Samples to start you Parker Mfg. Co Sample 478, Dayton, Ohio MAKE 800% tials to © 325 Harrison than ma- price Built guaranteed just starting. Perry-Ludiow Co., Class $12 a day hosiery for men, Sell In- women, colors. spare time applying gold ini- automobiles. Samples free. Ralco, Ave., Boston, Mass SIDE-LINE Salesmen Big sured. National organization specialties to trade or consumer. Send for catalogue and winning sales plan Ostra Corporation, 114-L East 25th Street, New York, Y WHY work om profit profits as- selling staple for others? Make and sell own goods. We show you how Enor- profits. Write quick for free book ex- x everything National Scientific Lab- 211 North Monroe, Richmond, Va plat- $10 daily silve refinishin bedsteads, r E Decie troadway, New York ¢ ring mirrors metalware, autos, headlights Outfits Laboratories, 1133 ity.

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Works WANTE daily Eagle Dept $10 know le owners ing si! sa sales, } r Only_ pr t A E York AGENTS PI POPULAR MECHANICS ADVERTISING SECTION Ss who can reach 0 weekly withou If they an lay reach of its 8 West PORTRAIT age lion pocket elry, Send guara tibse BOR ¢ MADE in one week ull town without cay 10cal ivertising Great shirt Sample pair $1.00 pe ties at wh Flexo Comp. Shet EXCEPTIONAL 1 it \ sell absoi on WILLIAMS’ |

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POPULAR MECHANICS ADVERTISING SECTION profits, Sell the ‘Twentieth Ice blanket sam ple Polor ice rison St., Davenport, Iowa. Needle- Also Hutter atest 10c Sellers 3 San l0e. Pencil sharpeners. n, N

d metal outfit makes 10-l5e like wildfire. 25e New Jersey Sta., Jersey City,

Z cloths. Tent state for Auto and Battery ted in each ‘ower Plat Dixie Storage Maryland New Sells Bamboo self-filling everywhere Sample rticulars Kobayashi ll River Street, Chicago, itin Agents new original grease, everywhere powdered grime, ink, the hands Every me- dy who ustomer. to get informa- stamps, lar Products ‘treet, Chicago. ‘ r Fretnot’”’ - Be convinced i busines You o $100 . vi you can weekly, according it have to buy at s t leave looking for you long to make the rounds rnished free Premiums Exclusive territory ts who car produce call P. M. Motter & iT Blvd . cago. ] facture r wants Agents ne of shirts direct to patterns Big values. s Madison Mills, 503 1 Rubber Re- ubes: supersedes vul- of over 800 per cent; vuleanizes itself in two 1aranteed to last the life Sells to every auto dealer For particu- big money and free Rubber Co., Ama- Dept. 505

agent wanted each lo- take orders ie handmade and cord tires: guarantee 12,000 miles (no seconds) ; on approval; get your tires or experience required; weekly Write for whole- ample kit Address, Mel- Dept. 100, Kansas City,

more Prevents mileage $10.{ a day or re Protectors -outs Doubles ement or tools ear guarantée Dayton Ohio Ma- s Gre atest Acding an Retails $15; work $500 monthly easily to stores, offices, g2 Simple easy adds, sub- divides automatically durable, handsome. Five Tremendous demand; Liberal trial offer Pro- te quick Lightning F, Grand Rapids, Eleven piece toi- like blazes at $1.75, shears free to each on Foster Reid Station C, Chic ago. Daily “Meai 8 $130 fit Same on renewals 000 deatl $25 weekly bene- t kness Men and women Premium $10 yearly. Full Easy seller Write quick nderwriter Dept St.. Newark, N. J

$75.00 WEEKLY with Sells on sight to auto owners and trade One man in Columbus, -s sold 5 in 60 days, 100 to 200% pro investment. Write today “for w“ plan and information. Cc Dept 13, West Fort Ann, 500% PROFIT selling Genuine Gold sign letters Guaranteed never to Easily applied. Experience Wonderful future. Free Samples. Guaran- tee Sign -Service, 363 W. Superior, ‘ cago WANTED—tTailoring Sa Agent—Make big money from very start—$60.00 to $75.00 weekly Largest made-to-measure tailoring house, furnishing an equipment of five hun- jens, wants you to take orders ion guaranteed. Biggest merchants nany towns have started with eur line you want to establish yourself perma- nently in business and make big money write for full particulars, giving your ex- perience as salesman or tailor’s sales agent H. F. Foster, Sales Manager, Lock Box 483, Chicago. DUSTLESS Sponge tion Retails 50c Rub Cleans, Polishes Furnitur Nt ford, Conr WHY work for others K your own goods We show you h profits Wri ite quick for ng everythi National Scientif l Mor roe, Rk ~hmor new specialty

Leaf fac unnecessary Cloth New Inven- —Costs (16« l Automot iLife (A) Sponge, iles, Hart-

nous free box plain A 3E NTS — At enables us the old last! a al machinery to sell our patented curtain rods price of Three Cents eact Big rs Write Home Curtain Rod ence, R. I EARN big money tials to autos profit on $1.5 —partic ples free i Dept 17,

fast apply _ East Orange, N $7 150 0 WEEKLY assure i if ¥ Sell ‘ati ractive gold signs to stores Unlimited demand. Experience ur Free samples Acme Letter Co., Superior Chicago $10 DAILY and New discovery sells like hot cakes t rrerchants, everybody Over 100% Popular price. Big repeater. Ex ritory Write for Money-( plan. Denmac Co., Dept. E Ave., New York REX India Fibre Broom oO biggest sellers on marks t Outlas dinary brooms—pri gh profit. Rex Fibre Pr. ducts Cor New Jersey Ave Brooh ‘ neces

more to real BIG Money and i Fast Sales id Initials for his aut e $1.35 T for particulars and f nogram ( @ Shinn, Manufact New Yorl BIG Profits With Exclu $50 to $100 weekly easy made repeatedly in one day derful invention delights Automatic hot and without plumbing everywhere Send i today Allen Manufacturing Blas T ledo, Ohio -ATENTS—Write for guide book and Evid Blank. Send sketch « o patentable Prompt tor D. ¢ \ DAY an clearly how : large pr Hosiery and Underwear, It is Free Write today pany, 41-E, Grand Ray

LIVE man to distribute for Ointment, hand or mail lid opportunity Writs ‘ 294 Parkdale, great

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POPULAR MECHANICS ADVERTISING SECTION SELL buys the $800.00 in free. Nichols AGENTS old reliable Ne Everybody nee * Bryant Sample Naperville, and cleared It's Co., Ill N-R-G Laundry Tablets, the moneymaker for live agents Millions sold—used in many homes—sales waiting for you. Clothes washed spotlessly clean in 10 minutes without rubbin ree samples. N-R-G Company, 732-A N. Franklin, Chicago AGENTS Big Returns, fast office selle 4 particulars and samples free One Dip Pen Co., 2 Daily Record taltimore, Md AGENTS make $10 line guar- anteed extracts, food perfumes, toilet goods, household 1 No cap- ital or experience needed Free sample case and instructions Write for amazing offer. Perkins Products Co., Desk Hast- ings, Neb $100 WEEKLY. Agents, Crew Managers. Absolutely new article selling big to house- wives No capital required Commissions paid advance. No collections No de- livery Exclusive territory Write quick. Pioneer Cory 6301 Yale Ave., Chicago, IIL. $15.00 DAILY selling Radio Gas Lighter. Sells on sight No matches or friction re- quired, Sample, l0dc Rapid Mfg. Co., 10 E. 14 St., New York, N. Y.—Dept. P WHY work for others Make and sell your own goods. We show you how Enor- mous profits. Write quick for free book ex- plaining everything National Scientific Lab- oratories, 211 North Monroe, Richmond, Va AGENTS—Clever Invention! Inkspoon makes every pen a fountain pen. Fast office seller; big profit, demand increasing every- Exclusive territory offered. Sample . H. Marui Company, Tribune Bidg., New York, N. Y¥ $50-$150 A WEEK Window Letters Easily Offer to general agents Metallic Letter Cx 438 cago DON’T Formulas is for B daily—Big products, ecessities 6, in Free Samples Gold Applied Liberal Enormous demand N. Clark St., Chi- Risk for Anyone’s for Information to ‘‘Make and Sell your own Goods’’ till I’ve sent you my Valuable Literature and Many Formula Lists of Guaranteed Reliable Formulas for Manvfacturing Biggest Selling Specialties in all lines. Highest References. Twenty- six years supplying the Best. Miller Chem- ist, 805 De Leon, Tampa, Florida. SENSATIONAL new vest pocket lighter Retails $1.00 Triple plated, fas- tens to watch chain. Agent’s sample and particulars, 60c. C. Thomas, 5236 Harrison, Chicago AGENTS Auto Monograms, New Pictures, Window Letters, Transfer Flags Novelty Signs. Catalog Free. Write Hinton Co., Star City, Ind SELFOLITE—Agents, lite lights any fire while user sleeps, or any time. Performs surprising stunts, Newly patented Sample 25c, postpaid; money back. Particulars Co., €195 Station A, Boston, MOST Wonderful Seller dollar, No stock to carry. sary Sample free. Mission, Smith, Detroit GET ticles, fully St One Penny cigar make 500% _ profit handling Streetmen—Selfo- 96c profit every License unnec- 2421-PM, Case—Toilet ar- specialties. Wonder- Derma Co., Dept. A, Sample and La Our Free perfumes profitable. Louis, Mo AGENTS—Good salary and commission selling ‘‘Ratskyll,”” new rat and mouse exterminator ready for use; no bait re- quired non-poisonous; rodents die out- side premises; no odor. Empire Specialties Co., 1549 N. Wells, Dept. 301, Chicago, CALIFORNIA Rosebeads selling cakes Agents coining money; new Lig protits Catalog free. Mission, PM, Smith, Detroit like hot stult AGENTS—NSell Neverfail Lron Stain Remover Huge profits Sample Write today. Sanford Inc., Newark, N . Dept. 6 Rust Big Beal and line. Co., FORDS use kerosene and start instantly with new Super Carburetor. Seward’s profit, one day, $74.00. Write quick. 1306 Super, 1304 Fondulac, Milwaukee, Wise SELL “‘AMENZ” Shirts. Wonderful op- portunity for big profits. Made -to-Meas- ure and Stock Shirts; finest materials. Write for details. Menzin Shirt Co., 3863-A Third Ave., New York, N. Y AGENTS—Crew men, novelty men Pen, a 50c mucilage fountain pen body buys on demonstration. Write protit plan Gloo-Pen C (FF) St., New York CABBAGE Cutter, 5 vegetables, finer than dulls 20,000 users Cincinnati alone: en- dorsed ty Good Housekeeping Institute Sample 48¢ Meyer Cutter Co., Orland Ave., Cincinnati, Ohio $75-$150 WEEKLY assured if you hustle. Sell attractive gold signs to stores, offices. Unlimited demand, Experience unnecessary. Free Samples Acme Letter Co., 363 W. Superior, Chicage WANTED Gloo- every- for big Front Knives, slices 20 aluminum; never Representatives to sell Auto- mobile necessity. Kills headlight and sun lare, Write for sample Dept. P, The Clark Products Co., Springfield, Ohio PORTRAIT Agents—If you are for a better grade of work, we can you, Our enlargements have that finished ippearance together with perfect likeness, which makes, it a pleasure to deliver, and best of all our prices are not high Ex- port work a specialty. W. G. Hannan C Dent. A-5, 57 E. 18th St., Chicago AGENTS Big profits Jenuine Gold Leaf Window Letters anyone can put up. Seripts and 57 varieties Chicago Agency Co., 842 Altgeld St Chicago PORTRAIT Agents and Profits. Sell Perry Photo charge $2.98; make 400% profit. $10 easy. Big exclusive line 4-day service. Perry Photo Novelty Corporation, Section 16, 360 Bowery, New York WE start You Without a Extracts, Perfumes, Toilet unnecessary, Carnation Louis. looking satisfy Others. Get Medallions. Dollar Goods Co., Soaps, Expe- rience Dept. 201 t AGENTS make a dollar an hour, Sell Mendets a patent patch for instantly mending leaks in all utensils Sample package free Collette Mfg. Co., Dept. 404-B, Amsterdam, N. Y AGENTS—Clean up $100 “Nifty Nine.”” Weekly average, 100 sales— dollar profit each. 30-40 sales daily fre- quently made; demonstrating outfit cinches order, 30 other coin-coaxers, all daily necessities. Postal brings our unique plans. Davis Products Co., Dept. 506, Chicago. FIFTY ‘‘Ideal’’ Sidelines for Mail Deal- ers and Agents. 500% profit. K. Home, 1957 Warren, Chicago. Mog AGENTS—Sell Patented and Cigar-Case Moisteners. Start making money at once. circulars, cuts and sales plan Co., Dept. M, Milwaukee, Wis FOUR $7.50 sales to merchants $20.00 daily: largest manufacturer of kind in the World. Sayers Systems, Sheffield, Chicago, Weekly With Cigar Lighters Big Profits. Write for Drake Mfg. net you its 2815 HIGH-GRADE SALESMEN WANTED “HOW to Sell Patents’’ News-O, Washington, D. C free. Patent AGENTS, control territory, BEdjol Fla- vors, household necessities, perfumes, creams, toilet waters, famous ‘“‘Edring’s Herb Tablets.’” Jet Pharmacal Co., Allen- town, Pa HECK-O-BRIGHT Polishing Fast at 25 Sample Free tros., 3123 Northwestern Ave., olis, Ind QLARKE made $ pocket windshield autoist, motorm glass clear 2 proposition fre« 662, Toledo, Ohio. Cloths Sell Heckman Indianap- 18 an hour selling vest- leaner by every an, engines rub keeps hours ( amazi Mfg. Co., Dept e¢ ne 1.000 sold nee r Security 2 MEN who travel medium size and small towns regularly can add $50 to $150 weekly to their income with the famous K. & 8S line of salesboard assortments. Look up our rating in Dun’s or ask your banker Salesboard experience preferred, but not required Write for complete information K. & 8S. Sales Co., Dept 160, 4325 E. Ravenswood Ave., Chicago WANTED Aggressive of the United our White Way Shoe Wire Suede Brushes and Every woman and girl Liberal Commission and territory wanted ert Mfg. Co., 228-36 N. ¥ in all Canada Cleaning Stocking a poten- Give 3 The South salesmen sections States and to sell Gloves Savers tial user xperience Gill ester is T Rocl you IF $75 «(to our ure not you with delivering fet ~=your you write, erences sults ing WANTE and tire and cents. ean $150 guaranteed $29 at necessary finest pay, state ings, Minn. wrench Benson sell, A Address Company, ve week wool all cash with experience Dept, 626 Chicago Salesmen shops new sells Satterstrom WHY not sell us your spare t $9.85 New per hour, —introduc iery—57 or We also sides. delive ing styles, r experience required and monthly Complete Daily Style 17 collect bonus, colors—grades, Chee Ohio Mills Cc 0., outfit easy colors Just y Free ur including esk TAILORING wool wool $19.50, this is America pleasing business full Address Dept. 5 SPECIALTY Salesmen Butterfly retail type to dye, to commiuisslor se sults tropical palm the agents tailored best the for his ) worsteds beaches, and man customers such information men about Sales-Manager, J I wanted order two $17.50 biggest who to we will our s 831 W. Adams St stores basis of Tints everywher Sutterfly T pany, Minneapolis, Minn EARN $10 daily silvering n ing and chandeliers, furnished Broadway, $4.00 Free Ge quickly tter refinishing "Mf for Guarar \ aut and ge metalwar bedsteads, headlight E New Every Experience Drawer 596, Hartf tories open SPECIALTY Self-adjusting and line Men L. Hunt We _ start everywhere salers 2703 MAKE Auto rages visors, cleaners, any part. Generous lee Mfg 8S or a Machine Permanent Clinton-Clark Dearborn St Decie York PROFIT Sample.”’ on New City Ever Storekeeper, I Salesman Gear Shops. wanted Mfg RUMMAGE you Sales—Make unne Pullers Full tin Big Pay Boscobel ¢ Laborat Spe ait Se Representativ Steady Accessories accessory plugs, COUNTY newly safety Box raz 605, r Seattle, an, boy agents Crimp simple, rope pays wash leases Every and booster Write ma Gr for for ke ip spark Ww e patente representatives sharpener 9 blades L can Seller! Easily transformers. carry commissions Sta. $8.00 busir Co., Chica Incomé & sok dealers oil gauge Sell w customer Low 1 t for Sample Wash A WONDERFI or girl from Ar big to nake Clothes Line itself days. quickly housewife there a he particulars, Ne re re ) time-saving also used for many other quickly knots Every who thousands device im tir it hom uses (Cr but or pair and a mounted sample, ager , Belvidere, Tl BEST Seller tubes; over ticulars t tires and saving of canizes to last auto ticulars sample I’a., Dept owne h TRAVELING Salesmen cal wante stores won Boonville, ) r ow ier itself life in of and a to Amaz 10 d ful e its 800% : two or accessory make Rubber t n r Crim Jem supe rse ire by line not \ a put minutes tube dea! big mo Co., larg: of fast -arning > D Cc, Oma ! manu w W faster fa t writs

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POPULAR MECHANICS ADVERTISING SECTION N—Become Independent. Own experience unnecessary; sell- Accidental Death, i Weekly Benefits; ints proportionate. income from renewals. ited Insurance Department. ept. A, Newark, N. J. Guar- Salesman, all towns, for by richest-looking, soft as silk, to order men’s suits (guar- price $27.50. ; advertising. 1iloring experience unneces- itfit shipped for free exam- ile Direct Tailors, Dept. Y esal irnish Offered a Grocery Store? Better. You can handle ed Goods, Dried Fruit, line of Groceries, as well ng, and Automobile Oils, pay; no money invested; from samples. Goods are roven quality. Selling ex- essary, Steady, profitable rkers Address Hitchcock - 200, Chicago, Il Refer- or Express Co. ortunity for cigar, elec- y and specialty sales- and retailers nationally fier Necessary accessory entirely new for protected ter- Consumers Bldg.,

Groceries, Paints, Automo- ng, Stock Food to consumers no capital or experience ly, profitable work. Commis- Satisfaction guaranteed siness Write for full par- n & Browne Co., Whole- S. State Street, Chicago,

s and Painters: 500 Silver Sign Letters for Windows Anyone nd Free samples. N. Clark St., Chi- selling like hot ey Absolutely free. Mission, $5.00 a day sell- Pencils, Signs, Adver- Yardsticks, Whistles, et< Sells entire year Fine traveling agencies Dept. 226, South Bend, pays five to ter rders for Specially rtising and Match Box »positior sam ples, Printery, Rock rdsley’s Down” snap fasteners, keeps prevents slipping Dealers ted Vest pocket sample specialties State expe- Empire Notion Co, 72 ivenue, New York ® MEN M os t liberal sanitary brushes Juality line—quick service— lest season now Write I Brush Co., 320 Lan owa Managers offered on sme Fastest e w measure—$29.50—one Profits in advance. Big- house W. D. Smith Co., Dept ll, Chicago selling Saiesmen, if you are is “G Business”’ extinguish the home i fire start you can sell others. th 1 exclusive territory McMullen Fire Ex- Dubois St., Detroit, \LTY iae t i a t

Aluminum Hip-Suspenders ild down, pants O pressure. Illustrated, page : Mechanics Enormous ass of testimonials 1.00 Sample pair $4.00 gross $40.00 Lafayette, St. I . rs Shirt stores Peerless”’ Creditors’ Bldg., Associa- Minneapolis,

43 $5 PROFIT selling $7.50 necessity for sample. Merchants Ass’n, Minn. SPECIALTY Salesmen or State Distril tors for Auto replacement part. Sells all leading dealers Big repeats quick. Good proposition Keystone Co., Pacific Bidg., San Francisco SALESMEN—New auto tube, seals its own punctures, fully guaranteed. Car own- ers buy on sight, when demonstration is shown. Harrison Mfg. Co., Hamm« Ind ROPP’S Calculator and Short-Cut Arith- metic shows the answer as quickly as a watch shows the time to all problems lI‘kely Clerks to occur in office, store, shop, bank, farm positions— or factory Price, pocket size, paper 35 toch cents, cloth 50 cents, leatherette $1. Desk size, cloth $1.50 postpaid. Popular Me- chanics Book Dept., 200 E. Ontario 8t Chicago. F Writs MEN 18-35. Minneapolis, $1600-$2300 Franklin Ir N Railway Mail Clerks Write for particular istitute, Dept. 8-21, Rocl tel

Railway Mail, Pos Act | ti Pay Sales ‘ Calif

Robbins, Bldg Wa Cl si

verlisement MEN 8 WRITE artick time for pay ( cate, 55 newspaper ypyright | St é

OUR genui HELP WANTED are an ex tion for hand Wages Immediately. Bethune A‘ E., D San Francisco LARGE ALL men, nen, boys, girls, XY Se. willing to accey Governr a $117-$190, traveling or stat Mr. Ozment, 101 St. Lo diately

STOF Working for rouslot B 7 ~ UNEMPLOYED: Read Em| azine. Copy 1dc, 716 W Ind LOCOMOTIVE Firemer nearest their homes 5 4) monthly A Desk M-1, Bro everyw! START Silvering Mirror Tableware Replate stoves v t l ice Sprinkle, Dept. 2 SALESMEN than any other try to men sel twisted-ilr wire Grip Brush ¢ AGENTS ganizir sal £10,000 we Distributors s ff autor FIREMEN, Sleeptr car Railwa x Daily ez r Style Guarant colors. No capit Just write deliver Your pay monthly Free Complet itt furnishe grades 1 Co., Desk perience LOOK Government sitions obtain Institute, Dey WAKE up, ‘ al Broa LOOK I s Govern: year Stea positions Common ¢ not needed st positions and t free Writs Dept. S Paid ons titute

GOVERNMENT Many pen bookiet free 4-41, Kesne SHOES—Becom« ™ , rade lirect t wee res T ller and good ce s ‘ I r juired 4 ers { Mf 2 Return » Boston, W 7th, Ir

DECORATORS Da te Art

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44 POPULAR MECHANICS ADVERTISING SECTION TYPEWRITERS AND SUPPLIES UNDERWOOD Typewriters at far less than manufacturers’ price; rebuilt, all worn parts replaced, guaranteed good as new Cash, installment payments, Write for Catalog A-151. Shipman-Ward Mfg. Co., estab. 1892 Montrose and Ravenswood Ave., Chicago, Ill. TYPEWRITERS, all $10 uy Fully guaranteed, Free Write for complete lists Typewriter Exchange, 320 Bt., Chicago. standard makes, trial. Northwestern West Goethe ADDING MACHINES FREE Trial. Marvelous new Adding Ma- chine. Adds, Subtracts, Multiplies, Divides, automatically Work equais $350.00 ma- chine. Price only $15.00. Speedy, durable, handsome Five-year guarantee Used by largest corporations. Write today for cata- log and free trial offer. Lightning Calcu- lator Co., Dept. E, Grand Rapids, Mich. NEW $3.50 Machine. Adds, Absolutely accurate Capacity $999,909.99. Fully guaranteed. 75,000 pleased users Makes adding easy. positive, quick. Eliminates Mistakes Saves Postpaid, $3.50 Time 0 Bassett Co., 1458-R Hollywood Ave., Chi- cago. Automatic Adding Subtracts, Multiplies DUPLICATORS AND DEVICES QUALITY Tell us your Money-Saving print anything Dearborn Street, Chicago. SOMETHING New: Thin-Pack and Calling Cards 100 paneled cards and elegant seal grain case 50 Agents Wanted—sample case lic. Anderson Co. Crivitz, Wis 100 PRINTED white envelopes 79c post- paid. Quality Printery, Robinson, Ill FREE Card Case with somely printed on case with every order of Calling Cards, 25 Cards 25c, 100 Cards we Samples for stamp. Mail Order Prtg. Co., 2510-A 8S, Twelfth St., St. Louis, Mo PRINTING, ing Low Service. Printing! Reasonable Prices! wants and let us quote our prices Best Work We Ernest Fantus, 525 South Business your name hand- Multigraphing, Prices, Attractive Adeco, 444 Mimeograph- Work, Quick Broadway, Albany, 1.000 opes, Troib Mass 250 LETTERHEADS, 250 white en- velopes printed and mailed $3.00 Sam- ples printing free. Address Sunco, Mo- hawk, N. Y HAMMERMILL letterheads, envel- $3.25 250, $1.25 Samples free. Press, Worcester, Providence, 3,000 BEST Grade Bond Letterheads or Envelopes $10.00 Chicag« Commercial Printing Co., 1218 S, Racine Ave., Chicago, 1,000 LETTERHEADS, Statements $3.50. Samples & Sharp, Bayfield, Wis Envelopes or free. Johnson STENCIL Prints proval. mos, Pa ‘“‘MODERN”’ Duplicators save Time, La- bor, and Money. Gets Business Repro- duces Typewritten or Penned Letters, Draw- ings, Lessons, Music, Menus, Bids, Notices, Specifications, Maps or anything in one or more colors. Prints Two per minute, Spe- cial Sale On: 30 Days’ Free Trial. $2.25 up. Booklet Free J. E. Durkin-Reeves Co., . Pittsburgh, Pa YOU can make 50 to 100 copies of a letter, notice, etc., at a cost of three cents on a Heyer Quality Duplicator. Write for free trial offer, The Heyer Duplicator Co., 162 N. Wells St., Chicago, Duplicator — Two Dollars. Typewriting—Handwriting On Ap- Primos Specialty Co., M-3, Pri- BUSINESS SERVICE INCORPORATE work, saving you money in liberal laws of ree Southwestern ment Co., Box D488, INCORPORATE any enterprise under common law; any capital; transact busi- ness any state; no corporation taxes; no personal liability; raise capital; keep con- trol. Booklet free Herbert Company, 5 Rand McNally Building, Chicago. lawyers do the annoyance and incorporating under the most Arizona. Laws and forms Securities & Invest- Phoenix, Ariz Our time, PRINTING, ENGRAVING AND MULTI- GRAPHING USE Better Grade Printing. 1,000 Bond Letterheads $6.00. We print anything. Review Print Shop, Holgate, Ohio 500 BOND Envelopes— $5.00 Stationery Specialists, Sentinel, Hurleyville, N. Y. 500 BOND Letterheads Grant, 17153-12th, Detroit, Mich PRINTING Outfits—Presses, type lies, type novelties. Send stamp for jogue Model Press, York, Penna 1,000 HAMMERMILL Envelopes, $4.00 Full Free Quality Printshop, PRINTING heads, 250 Letterheads—500 $1.85 postpaid. sup- cata- Letterheads or Line Samples Marietta, Ohio. Envelopes—Letter- Rodgers Special: each, $2.65 postpaid. Hoggard, Windsor, N. C. ONE Hundred opes; $1.50 N. J Letterheads; Envel- Service, Irvington, each Jacobus QUALITY Printing at Reasonable Prices. Tell us your printing wants and we will quote prices which will save you money. Best work. We print anything from a letterhead to a catalog, Fantus Co., 525 S. Dearborn St., Chicago, PRE-USED [Printing Presses. supplies. List for stamp. gains. Richland, Pa QUALITY Printing—100 8x11 bond letter- heads and 100 bond envelopes, $2.00; 250 both, $3.50; 500 both, $5.25; both, $8.00 prepaid. Model Company, Man- chester, lowa. 500 TWO-COLOR letterheads $2.65 ples free, ** Adverpress,”’ waukee. Type Popular and Bar- Sam- Station C, Mil- 1.000 LETTERHEADS or _ Envelopes, $3.00. Sent Prepaid. Samples Free. Moni- tor Press, Morrisville, Pa. BOATS AND LAUNCHES es made West Ma ROW BOATS—easily, list free Weesho-Uco, troit, Mich, “HOW to make Send for booklet. L. 152 Kneeland S8t., 12%’ ROWBOAT—easily ma struction blueprint 30e West Market, Detroit, Mich 12’ FOLDING boat. Construction West Market, your boat erdl Boston, Ma Rowboat—eas \ blueprint 30c¢ Ww Detroit, Mich. FOR THE HOME GRANDFATHER Clock works Build your own case; instructions make good profits selling your Clock works with chimes for old cases. Write for full particulars Co., Ruffner St., Philadelphia MAKE Inexpensive Blueprint 35 den, LJ LEOPARD, rugs $45 up New Iceless Refr William Quen and mountain Gerlach, Bo ocelot Albert Orleans, La CANDY CANDY—Very choicest, 1% Ibs ir postpaid Superb hand-dipped a pleasing variety of nuts, fruits caramels, etc So good your frieml ask where you got them Aunt Chocolate Co., M-310 West Super Chicago. Wwoolat DIAMONDS, WATCHES AND JEWELRY JEWELRY Davi Simon, Mo. WONDERFUL “Rainbow Sapphire’’—changes cx every different light conditior stone $3 carat Other Sapphires up Mountings, Emblem Ring Valuable agency Pauer (Importer), Dewitt St., Buffalo, N. Y Engraved Initials 4927 Fountain, St Scientific ANTIQUES AND WAR RELICS 225 BOND letterheads, envelopes, bill- heads, cards, $1.25 each Combination, $4.00, Economic Press, Leonia, N. J. FOR MEN ARE You Old at Forty? tisement on page 138 of this issue. The Electro Thermal Company, 2122 Main Street, Steubenville, Ohio PIPESDREAM, BPipe _ cleaner, Sample 1l0c Vinobar Co., 2 Jersey City, N. J. See our adver- Patent; 227-A Summit, FOR SMOKERS TOBACCO—Extra Smoking, 5 Ibs 10 Ibs., $1.50; 20 Ibs., $2.75. 5 Ibs., $1.50; 10 Ibs., $2.75 guaranteed Mayfield, K PURE Leaf Tobacco. Rich test Chewing, 4 Ibs. $1.35. Smoking, 10 Ibs. $2.25. Collier, Martin, Tenn. liable.”"—Martin Bank.) ENJOY Life. Smoke Old Field Tobacco, Sample 10c, Hast Malling Co., Paducah, Ky , $1.00; Chewing, . Quality O’Connor Smokehouse, 8-140, y Red Color. 10 Ibs., $3.35. Prepaid. 0. D. (Collier is re- RAZORS AND BLADES BLADES resharpened, one edge, 2c; dou- ble, 3c; Regular razor only 20c, All hand honed Address Conn Honing Co, New Britain, Conn. WE print anything, Stationery, Cata- logs, 1,000 small 4-page Circulars, $5.00 Samples Hammermil!l Cabinets. Commer- cial Press, Batavia, Ohio. BETTER Printing for Less Printing users, send for free thousand items. Mattax’s Tremont La, Money samples of Print Shop, BLADES, resharpened, one edge 2c; ble 3c New York Edge Co., Glen dou- Cove, WANTED—Salesmen, Territory still open to handle “Lewgold’’ imported razors, shears complete line imported cutlery. Good commissions Lewgold Imports, Box 547, Syracuse, N, . INDIAN log free FOR rope’s signia, Relics, 20-page Clearing Cata Grutzmacher, Mukwonago, Wis Dens—Relics collected fror Battlefields Weapons, medals helmets, etc Illustrated « and sample War Photographs 25c Welsh, 2117 Regent Pl Brooklyr SOUVENIR—The death deal Grenade made into a beautiful Electric Boudoir Lamp at a s low price Write for free circula full particulars. Art Furnishings pany, Desk 2, 1038 W. Chicago Chicarco INDIAN Mats seyville, Baskets, jlankets, W Wholesale. Catalogue. Gilha Calif PHONOGRAPHS AND RECORDS BUILD phonoparts motors of tonearms, terial Phonograph, Quality Serenado motor other types Electric reproducers, amp'ifiers x accessories Free lueprint building instructions, Big saving derful results. Prompt delivery mailed for ten cents, Hoosier Ma ing & Supply Co., 313 Baldwir Indianapolis, Ind WANTED, Machines to Repair Phonograph Shop, LaPorte, Ind FOR Sale—3 New Double-Fa records, $1.00, while they last Phonograph Shop, LaPorte, Ind Your BUILD your own Phonograp! nish everything at lowest prices. W Catalog American Phonograph ‘ North Crawford, Chicag« MUSIC AND MUSICAL INSTRUMENTS Eby’s 840 pa Buff SAXOPHONISTS Method, 44 lessons, $4.00. Virtuoso Schools,

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—— —_—_— POPULAR MECHANICS ADVERTISING SECTION Writers, Wave real propo- er, D110, 4040 Dickens Ave., ATTRACTIVE Offer for your several in- ventions. Sterling Buck, Washington I. ¢

eliow, Soulful—on wonderful instru- Gustav F. Hen- Denver, Colo. B money and reputa- formation, J. Gordon Hoyne Ave., Chicago. t vords Bauer sa’s Band), Oshkosh, per Nathan, Ago

ATENT ATTORNEYS

ly procured Personal, t service. Highest refer- ees Send sketch for h and advice George f Patent Law, 54-I, l Washington, D. C. 1 Prompt service. 3 lays. Send for our ention form and Free y to obtain a Patent. lel for examination. thout charge High- a Jacobi & Washington, safely, send personal advice estimate of stered Pat- ing, W ash- an invenh- our blank his should t us to- description give purchase We have requests, g 45 re- es in all to men- Novelties r General rticles 6 re- and Spe- Metal Ar- requests for nt 1 re- 1s 1 request for Tractors request for F for Games eavor t assist nercial development of R < growth at 1007 Woolwo at 714 Liberty Bildg., t 514 Empire Bldg., Chicago, I ma Bidg., and San Fran- 1010 Hobart Bldg. Victor Main Offices, 146 Ninth, ¢ ademarks, Copyrights pro- Ss very reasonable 20 booklet Free. H, Sand- Patent Attorney, 7 Rand ng Chicago

Sense See page 140 uld write us for our Obtain a Patent,”” which what may be patented steps to protect an in- ribes the procedure in and tells about assignments, trade marks, and gives nmiany about patents which every in- know many persons well nt matters have pronounced best of its kind they have written so you can under- request Talbert yers, 481 MeGill

1 properly and safely send description for personal rticular case and Lowenstein, Reg McLachilen B ng, Wash-

PATENT application filed plan. Trade -marks, y Stevens & (x @a5 F St 352 Monadnock Blk., Chi PATENTS—Before Submitt write f nformation conce 1 ability of att furnished Refer: stat B. P, F t t Lawy dD Cc MILLIONS spent ar t Hundreds now wante l! Pate ofit Write today for free w to pr t yourself, how ideas wanted, how we help you American Industries, Inc., 500 Bldg Washington, D. C PATENTS and Prompt service. frite f our new on patents Stal € in 1889 Swift & Co., ‘ Washingt i PATENTING and ventions explained by Master Patent Law, ington, D MONROE MILLER, Washington, D C., mechanical and f work t of “quati charges “INV and ENTORS Re sing to 0 record and Data Sheet free and valuable infor patent procedure costs, patentability includes < nearest your idea oe nell, J “ PROTECT ord ot I Patents Pp without cl Colur an #B INVENTORS inventiot 1 nature “How Tells Established references charges Ad Sevent Was! PATENTS, 1b ences. Best res Send model or draw Watsor F Street “INVENTORS G gives valuable inf all who have o ments Frank Le torney and Engines York BEFORE or after patent on y ir I over my t : for asking Labiner, Registered Attort g . New Yor

FOR INVENTORS

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46 UNPATENTED ideas can be tell you how and help you make the sale. Particulars free. Write W. Greene, 166 The Atlantic, Washington, D,. C INVENTORS: We sell patents mission Patent Co., Peterson, PATENTS, If which you wish fully and freely sold I on com- Iowa. you have to patent you can write to Munn & Co, for advice in regard to the best way of obtaining 1 tection Please send sketches or a model of your inventi on and a description ar the de- vic oe operation All com- ctly confidential Our ading over a period of enables us in many regard to patentability the client. Our Hand- sent free on request. ur methods, terms, ete., in itents, Trade Marks, Foreign $, t ““Scientifi©c American’’ con- atent Office Notes, Decisions of in- to inventors and particulars of re- patented inventions Munn & Co., Solicitors of Patents, 623 Woolworth Bldg., _—_ York; Scientific American Bldg., Wash- igton, D. C.; 801A Tower Bldg., Chicago, 11 : Hobart Bldg., San Francisco, Calif. GET your own patents Application blanks, complete instructions $1. Cutting Sons, Campbell, Cal. IN VENTORS—Send ufacturing development sheet metal and angle iron fabricating plant Liberal payment for accepted in- ventions Kirk & Blum Manufacturing Co., 2851 Spring Grove Ave., Cincinnati, O in invention terest cently your ideas for man- in our modern FOUR Pumps; tinued Patents Hydraulic Apparatus, Starting with compressed air, con- its motions by means of the hy- (raulic pressure and vacuum. Luis G Jimenez, M. E., 304 P. O. Box, Eagle Texas PATENT for 1435420 Automatic ladders. Weight of ladder to the floor any Cheap to manufacture Wm R. 636 Hickory Ave., Baltimore, Md Locking person angle Reed, Jevice locks PATENT on Home Water-works system Furnishes pressure from well or cistern Cash or royalty basis. C. Harbison, Eldorado, Ill AUTOMOBILE valve and valve modates all size terested address 92, Alameda, Calif. FOR Sile—A wagon-bed be made valve tool seat refacing valves and W. EZ Fehr, ined accom- If in- 0. Box Com! tool seats. P hew invention; end-gate and platform hay-loader. all sizes, handy to operate. estimated value is fifty thousand dol- Will sell shop rights for fifty dol- lars Interested parties address G. 7 Luckenbaugh, North Manchester, Ind AUTOMATIC Trap Nest, Separates layers from drones; safeguards eggs. Needs no attention. Outright. Canadian patent issued, U. 8. pending. R Hardwick, R. R. No. 1, Sidney, British Columbia. OUTRIGHT or Royalty Basis: Possible sales 20,000,000 annually. Retail $3.00, mfg. promt $1.00, user $10.00 Refer to t patent 1,447,883, March, 1923. otter Ole Peterson, Turner, Ore. to Can Its lars. Send INVENTORS, for free copy of Mod- eleraft, KR, G. Clyne, St, Louis, Mo. PATENTS. Write for free illustrated guide book, Send model or sketch and de- scription for free opinion of its patentable nature. Highest references. Prompt at- tention, Reasonable terms. Victor J. Evans & Co., 157 Ninth, Washington, D. C HAVE You an Invention? If for our free book. ‘“‘How to Get Your Patent,” tells our terms and methods Send model or sketch for our opinion of its patentable nature, Randolph & Co., Dept. 144, Washington, D. C ‘INVENTORS’ Guide’’ free gives valuable information and advice for all inventors. Frank Ledermann, _ Regis- tered Attorney and Engineer, 15-F Park Row, New York. MODEL Making and experimental work; Modern Shop; expert workmen Manufac- turing. Lamson Electrical & Mfg. Co., 625 W. Jackson, Chicago. PATENT Application Blanks ventors. Patent News-D, Washington, PATENTS FOR SALE write so, write on request; free to in- dp.c Combination & Talbert, Cc Pulverizer—13, 530-1; 1are—12,787- Talbert Mi: Gil Bldg., Washington, “FOR Sale—Traffic signal Patent pending. Write for Address Mr. B. Houghtaling, gon St., Madison, Wis You a worth-while patent, haven't you? Why don’t you tell our two million readers about it? Most of them are spe- cially interested in patents and new inven- tions Ask me to tell you how other in- ventors successfully sold their patents. Geo. F. Baker, Manager, Classified Ad- vertising, Popular Mechanics Magazine, Chicago, FOR Sale—A Silo-Door-Attachment Pat- ent which brings the Silo Door close up to inner side of Silo Wall, by a sliding motion. Simple and easy to apply. United States and Canadian Patent Rights. Drawings on request. Write Fred Gross, 138 East Mound Street, Columbus, Ohio Rn D. for vehicles. particulars. 409 W. John- have For Sale—A new invention: Lace Fastener. Address G Gaither, General Delivery, Washington, Dd. Cc MAKE me valve lifter for sight. Saves time, Real money maker. ginia PATEN on monkey wrench, February : 923. Vatent No. serial No. 500,550. John Villani, rose St., Brooklyn, N. Y HOUSEHOLD Toy, used Big Profit, proposition Stamped metal automobiles. Sells Cost 2c Sells 35c Graff, Cherrydale, Vir- patented 1,446,529, 31l Mel- by all children, cheap and easy to manufacture, Exclusive patent, no compe tition, unlimited field. Address Box Niles, Mich. FOR sale or royalty, a new design Potato Digger covered by 4 patents already mar- keted., Great success. Circulars, testi- monials and field views on request, A. Lauritzen, Charlotte, Mich. P ATENT Non-Skid ¢ Chain Fastener, and auxiliary link, which is prepared for cross links, Chris. Hanson, Box 68, Riansenelia, Minn, ENTIRELY ing sign and Royalty basis. Allister Street, 52, new invention for illuminat- entrance, Patented Canada. Wm, H. Galvin, 1137 Me- San Francisco, Calif SALE or Royalty—Patent 349 New phonograph case, facturing cost low. Chas, 8 Fla pending, 590,- novel. Manu- Tobin, Miami, FOR Sale—Toy Gun Very four parts Patent _sentins. Topeka, Kans., R. SPARK-PLUG, Cleans like a pipe; right or royalty, Box 100, Worth, _N FOR Sale: Kenyon Dise Screen. _ ican, Canadian patents granted; British pending. Improvement can be used in all hand and power vacuum washing machines Washes clothes thoroughly at bottom of tub with less than half the time and power, Eight Hundred Thousand machines in use. Thousands manufactured daily. John J. Kenyon, 1563 Waverly Ave., De- troit, Mich. only Allee, simple, Wm. i IMPROVED Drain and Priming Cock. Are manufactured and sold both retail and thru N. >. Jobbers, for one year; gave splendid satisfaction, Want to mar- ket throughout country ourselves, thru agents or sales-agency. Would consider selling patent outright or Royalty basis. Get details. A. & Mfg. Co., Wolfeboro, .. H Bevel makers and C. Straub, Pro- drafts- 63 for Sale—New and die royalty. Ill ash or royalty funnel device to prevent hot r breaking glass jars. Have Canada S. Patents. Charley W. Young, 682 St., San Jose, Calif, PATENTS For Sak To sell, tain patents write Patent News—P, ington, D, C, PATENT tractor for tool men Cash or E 42d St., Chicago, FOR Sale—C cheap from and U Julian Huy or ofr Wash- UNITED STATES — Canadian patents. Automobile bed; adjustable all touring cars and limousines. Folds package three x four x forty-one inches; can be used do- mestic purposes, Carrigan, Seventy-eight, Thirtieth Street, Milwaukee, Wis. DRAWING INSTRUMENTS AND DRAFTING SUPPLIES DRAWING Outfit, Newest aid to quick, accurate drawing—Golden Combina- tion—Drawing Outfit in one instrument— $3. Book of instructions furnished. Money- back guarantee Golden Compass Com- pany, Elkhart, Ind. DRAWING Instruments highest quality — lowest from importer. Circulars tive Engineering Co., Castle apolis, Ind, Slide prices, free Hall Rules, Direct Automo- Indian- POPULAR MECHANICS ADVERTISING SECTION SURVEYING INSTRUMENTS Ls NEW and used surveying instr rect from factory. Satisfactior or money refunded. Wissler, 619 B St. Louis. MODELS AND MODEL SUPPLIES ee MAKE Pirate Ship brings plans Maas & der Bldg., Milwaukee, PATENTS Procured Send model today for examination, port and advice. No charge for acivice Vrite for free Booklet form on which to disclose your est references. Promptness assur ence A. O’Brien, Registered Pat 562 Southern Building, Washir INVEN’ EN’ TORS Write trated guide book and tion Blank. Hi tention. Reasonable Evans & Co., 165 Ninth, PUNCH press and tool and die making, chine work wanted. manufacturing space Let our factory be your aaeewane and Machine 56 N. Clark St., Cl DIES, Tools Models, and tions our specialty. 222 8. Clinton St., ~ MODE L Modern turing 625 WE make working and do experimental work and carr plete stock of brass gears and 1 plies Send for catalogue. , Model Works, Tinley Park, BEFORE ordering your model free copy of Modelcraft R. G gineering Co., St. Louis, Mo Models Richter, Wis. te for our Evidence of screw-mac model and s Have dou fact Co., Dept cag and General Manufacturing of Logan Chicago, _Iil , Making a and Shop, expert workmen Lamson Electrical and Jackson, , Chicago hest -_——. Pro Term Vict Ww ash ingtor and added ma experin ental Ma Mfg mode Is f Br Manufact Machine T! Til. METALS trass, bronze, coy num, German silver, zinc, iror rods, tubes, wire and sheets. small. Jones Cut Metal Co Ave., Maspeth, Long Island, N No « FOR MANUFACTURERS SPECIAL and Fixtures an Punches and Dies stampings, Gauges, chine work to order, pany, Woonsocket, R WANTED—Metal Stamping work taken on contract basis ideally located and equipped patents. Meyers Company, Box ford, Ind WANTED Metalic Ariz, labor saving other product for all kinds manufacturing a ' Ta Manufacturer for Invention, E. Hedburg mact r fe yl MANUFACTURING PATTERNS, wood and metal tools and dies. Brass, bronze, al and iron castings. Screw mactl production work of all kinds. -- Machine & Pattern Co., n¢ Terre want dies and Lyons Machine Works, Ly IF you write us WIRE Goods, Cooley Mfg. Coa., Chicago. all kinds, made SCREWS, all metals. nuts, screw machine Autoscrew Works, Broadway, New York City LONG established manufacturer accessories which are daily sold cally all wholesale and _ retail houses will consider manufacturing tributing new automoblie products of equally wide sale through same Patented articles preferred Accessory Manufacturer, 1400 N ican Blidg., Chicago, tools and metal specia't Weldon Machine W Chicago GEARS, for price list Herndon 8t., WE design and build Send for free copy of Clyne Engineering Co., Writ I Addres 524-530 N. Western Models, im work Ma Haute metal stamping Ave.,

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POPULAR MECHANICS ADVERTISING sicTION ‘ ry, Jigs | SHOP Notes Volume 17 t 7 120 HAMMOND Mu production tools, | practical articles suci lalf-ton ‘I el- very > sets type kinds of metal ing Cram joring Machine ess w, $25, } g and ma- | Gas-Fired Forge, Oi)-G: \ Lis large Blue-Prints—Course, Tox year

Consulting Privilege, Eastc a" - — price, Pn al tt a an t six ADDRESSOGRAPHS Address Multigraphs, Envelope : Pee less than I Co., 112-B N

Page 218

48 DOGS, BIRDS AND OTHER PETS BLOODHOUNDS, Wolfhounds Catalog, Lexington, Ky, and _ Irish Kennels, Russian Rookwood Any COLLIES largest breeders; Albert Payson Terhune, nd for free illustrated son White Collie Kennels, AIREDALE All ages, able prices Kennels, Texas color, kennels any age; world’s recommended by judge and author. circular. Jeffer- Wauseon, Ohio. Terriers Farmer's Reason- Comanche, POULTRY BREED Squabs. Book free E. Rice, Highlands, 77 Massachusetts. elrose STUDY Your Type Do More—Be More —Have More Self-Revealing Chart and Personal Development Guide for l0c. Write Thomson -Heywood, Dept Chronicle Bldg., San Francisco, Calif 985, FREE—Stop using tobacco. free information how to conquer habit easily and permanently. Results guaranteed. Anti- Tobacco League, Box K, Omaha, Neb We will give TOBACCO or Snuff Habit, cured or no pay. $1.00 if cured. Remedy sent on trial. Superba Co., TP, Baltimore, Md UNUSUAL sisting of page Special and two-page and monthly Send 50c and Box 5, Fordham Station, Horoscope—Six pages, con- extensive and constructive four- Horoscope and Astro-Analysis, valuable guide showing daily advice covering entire year. birthdate Prof. Bolles, New York, N. Y. MISCELLANEOUS POPULAR MECHANICS ADVERTISING SECTION MAGIC bill book. how. Cc Johnstown, SPECIALLY prepared Sponge rr full instructions how to Press Clothes, $1.00 Sponge Cloth (x tox 1167, Springfield, Mass GET posted—Good prices terflies. insects, vertisement, Bill Book. Send 15 Easy to operate when > Hyde, 421 Cypr a. = ; ald Ta See Sinclair display page 28 ” HOMEOPATHIC and Biochemic prepara. tions sent postpaid to all parts of the world. Manual and booklets free Halsey Bros, Co , 111 N. Wabash Ave., Ct icago Illinois. Established 1855, : ° ARE you old at forty ? See our adver. tisement on page 138 of this issue The Electro Thermal Company, 2122 Main st Steubenville, Ohio, — TRAPPE! ad- Nelson’s patented packs for those going into the hills: best pack ° duced; carries larger load with less fatin Ask about same or send 25c for plans and make your own. Trapper Nelson Mfg (Co. tox 692, Bremerton, Wash 7 PERSONAL STARTING and taxes by Common Law plan under a laration of Trust. No quired to fill in Demaree a Company? organizing on Save expenses the popular, pure Dec- experience re- —— seen Ane ae Standard Forms, 5 MASTER Keys Work like magic issue shares and begin doing business at emergencies or prove whether your home once Genuine Demaree Forms are na- is burglar-proof Test and open thousands tionally known, approved by attorneys and of locks. Send $1 today. Novel key chain utilized by successful concerns throughout Free Master Key Co, 3 Manhattan the United States Send for large, free Block, Milwaukee Wis rg yhlet (C-53 conte ing uable : " 7" - ——— Fonte nt that you og el eae " INCORPORATION In Arizona Completed » : “ : In One Day. Any capitalization, least cost maree, legal blank publisher, ates advantag T Kansas City, Mo greatest advantages Transact business ae | : ee anywhere. Laws, by-laws and forms fire ART Metal Workers—You will find our Stoddard Incorporating Co., Dept. 2, Phoe- book ‘‘Metal Work and Etching’ a com- nix, Arizona plete manual on making book ends, desk sets, pad corners, paper knives, letter open- bashful, self-conscious, easily ers, stationery racks, rocking blotters, desk These troubles overcome. calendars, arts and crafts jewelry, etc.; particulars. C. Veritas, 96 pp. illus Price 50 cents postpaid 1400 Broadway, New York, N. Y Popular Mechanics Book Dept., 200 E. = Pa thie TOBACCO Kills Manly Vigor. Quit eas- Ontario St 4 ‘ hicago [a Pn fly. Cigarettes, chewing, smoking, snuff FOR Fairs, Picnics, Parks, Beaches; conquered or no charge. Small sum if Best Ride, Jazz Swing, Picture Machines, satisfactory. Stops craving; harmless, Full Films F. P. Light Plant. Bottling, ice treatment on trial. Perkins Co., 34-A, cream Machinery, carnival goods. Harry | Hastings, Neb. Smith, Gratz, Pa. ASK us! Any question about drafting, pattern making, foundry and machine shop practice, materials, machine designing, manufacturing answered by experts Charges reasonable. Commercial Engineer- ing Co tox 289, Spokane, Wash ARE you old at forty? See our acver- tisement on page 138 of this issue. The Electro Thermal Company, 2122 Main St., Steubenville, Ohio. YOUR Horoscope. Business, Changes, Friends, Enemies date and ten cents (stamps) test reading. Zanya, C-202 New York ARE you embarrassed ? Send dime for . 2 708 Walnut, Character, Send birth for remarkable W. 105th St., ARTIFICIAL Denver Optic, Eyes, $3 559 Barclay, Sooklet free Denver, Colo. CUTS anybody can make Simple, cheap process. | Specimens, particulars, 2 stamp. M. Day,- Windfall, Ind BLUE-PRINTS,. Castings, 4 power gasoline engines Model gines, horizontal or vertical Blue-perints of any one, 50 cents Order from. ad Stamp for circular, Master Model Cs., Boz 212A, Elgin, IIL Salesmen Reporting Big- gest Sales They Ever Made on Amazing New Inven- tion Everyone Wants SALESMEN ARE MAKING FORTUNES “ Am making $1000 per month. I have made big money before but did not expect so much. Your Burner isjust the thing.” J. Carnegey, 8. D. “Am sending teday for 7 Olivers. This is one day's orders ($85 profit). Selling like beer in a dry town.” W. H. Drew, Mich. “Send following weekly here- after: 10 No. 1; 8 No. 2; 4 No. The Oliver’s amazing features 5.” Berger's Weekly Profit on order, $258.50 R. Berger, Ont. “T made $43 last night selling Oliver Burners.” N. B. Chelan, Wash. \y -horge- steam eéf- "21 ERE’S an amazing new invention that is banishing forever the muss, dirt and drudgery of coal and wood fires—saving housewlves from roasting kitchens in Summer, giving ready heat in uncertain Fall weather and three times the heat of coal in Winter. Set it in any fire-box of any coal range. Presto! In one minute you have an actual gas stove. Then just the turn of a valve gives as much or little heat as needed. No Experience Needed for Big Money Besides its other points the Oliver burns 95% air and 5% oil, the cheapest fuel there is. With everybody raving about the price of coal and the probable shortage, sales of Oliver Burners are breaking all records You don't need to be a high powered salesman to make money on a proposition like this. sell it for you. Now you know why W. H. Drew of Michigan made $85.00 in one day; why L. Zucher of Ohio made $21.50 in three hours; why A. M. Russell of Connecticut has averaged $666.00 for the last 6 months; why one order sent by P. M. Ford of Iowa gave him a profit of $646.25. F. W. Bentley of Phil “Ye Gods—some s¢ made $215 today!” Quick Sales—Big Profits Every agent we appoint makes big money. You can, t have a number of definite territories which we are ready t of to those who act quickly. Coupon Brings Full Offer Mall this coupon now for our offer. We are not making al agant claims about this. We don't haveto. We wantt the facts Writing will not obligate you in any way B Send the coupon at once if you want to get in on this | whirlwind, all-season seller OLIVER OIL-GAS BURNER & MACHINE CO. 2048R Oliver Bidg. ST. LOUIS, MO. Oliver Oil-Gas Burner & Machine Co., 2048R Oliver Bidg., St. Louis, Mo. l Please send me full facts about how I can make big money representing you in my territory. Also your plan, if I wish to make big money in my spare time. Name Address

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for magic yOu know ress «Ave, Cloth with Your Owy 0, P.O ———— or but- isplay ad. ; | Cc prepara. ts of the ©. Halsey » Chicago, ee Our adver. Bue. four home thousands key chain Manhattan Completed least cost business vulars, 2 Ys -horse- Steam en- 3lue-prints from. ad | Ce., Box POPULAR MECHANICS ADVERTISING SECTION 49 Be An ELECTRICAL TECHNICIAN GET YOUR ELECTRICAL TECHNICIAN’S CER- TIFICATE THROUGH ME AND YOU WILL BE GUARANTEED THE AID OF MY ORGANIZATION TO SECURE YOU A POSITION PAYING YOU THE HIGHEST SALARY YOU EVER RECEIVED TO START Command $250 to $600 Monthly My course is designed to fit you for a position as Electrical Technician, Supervisor, Foreman or Manager of Equipment. These positions cover the electro-technical field and pay arate of compensation running into thousands of dollars a year. Take my Home Study course and prepare yourself in spare time by this most simple, direct and inexpensive method to become an expert in MOTOR MAINTENANCE. ARMATURE WINDING, BATTERY, SUB-STATION AND POWER HOUSE WORK, AUTOMOTIVE, AIR- CRAFT, TRACTOR AND ILLUMINATING ENGINEERING, GENERATOR, SWITCH- BOARD AND HOUSE WIRING, TRANSMIS- j SION, INSTALLATION AND LINE CON- ey , - / STRUCTION, and I will not only guarantee your ea eo success in this study, but I will undertake to train you until you Home Study are actually earning $3,000 a year. More than that, when you Dept. = graduate and are qualified to receive your Electrical Technician Certificate from me, if you are not more than pleased with your training, or if you are not fully convinced vour earning power has been GREATLY INCREASED, or if you are not completely satisfied you can hold down a high-class job at the highest rate of compensation paid men of your experience—either you may come in with me and finish your training here in my plant—at no cost to you—or | WILL GIVE YOU MY COURSE-—FREE There are no “‘ifs” nor “buts” about this offer. If -you have acommon school education and will agree to study a little evenings for a few months, I guarantee to train you to be a first-class man, or the course need not cost you one penny. _ Therefore, write at once or mail the coupon for full détails of my truly remarkable proposition. DO THIS NOW—to avoid possible disappointment. . Wonderful FREE OUTFIT Offer. With this electrical course you will get free and prepaid an up-to-daté outfit of, - eli il apparatus, instruments and appliances for doing experimental and practical work at home, and, in addition, if you reply to this ad promptly, I shall give ~ y smy student, a complete EXPERT'S training in Md ng RADI This is a wonderful opportunity for you, for with this S. & 4 Electrical splendid, up-to-the-minute FREE Course in Radio, . * "1422 W. Monroe Street F R E (covering construction, operation and installation) a ony ee ad, 4 ° > » arpir: ) res 2 . and my help, it 1S possible for you to make $50.00 euaganteed Home Btudy, ( —_ ~ eel: « s hile les ; zh « 3 , Trai n’ the best-pald divisions o aweck and up right at home while learning. I shall supply marralappage, the best-pald divisions of ou need to aid you to do this without one penny ex- make money while learning. Send par- e to you and youcan start RIGHT IN. Get details of ticulats at ont@tree of charge. creat offeratonce. Send Coupon or Write—NOW. S. V. SMITH, Chief Engineer wv. Home Study Dept., S. & H. Electrical Works \y Desk F.F.1, 1422 W. Monroe St., Chicago

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POPULAR MECHANICS ADVERTISING SECTION

7. “Look At Him Today!” “Six years ago he startec in here just as you are doing. makes more in a day than he used to make in a week, ‘The first week he was here he began to train for the job ahead by studying in spare time with the International Correspondence Schools. Inside of six months he got his first promotion. You’ve got the same chance he had, young man. Follow his example. Take up some I. C. S. course right away. What you are six years from now is entirely up to you.” This is the story of thousands of successful men. They did their work well, and insparetime, with I. C.S. help, trained themselves for advancement. ‘That’s the thing for you todo. Whatever your chosen work may be, there is an I. C. S. Course that will prepare you rightat home fora better position with bigger pay. More than 150,000 men are getting ready for pro- motion right now in the I. C. S. way. Let us tel you what we are doing fo: them and what we can do for you. The way to find out is easy. Just mark and mail this coupon. TEAR OUT HERE — — —— — — = INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5526-D, Scranton, Penna. Without cost or obligation, please tell me how I -— oe oe the position or in the subject before which I have mark BUSINESS TRAINING COURSES Business Management Salesmauship Industrial Management Advertising Personnel Organization Better Letters Traffic Management Foreign Trade Business Law Stenography and Typing Banking and Banking Law Business English Accountancy (including C.P.A.) Civil Service Nichelson Cost Accounting ee Mail Clerk Bookkeeping Common School Subjects Private Secretary High School Subjects Business Sranish 1) French Illustrating (CD Cartooning TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering Architect Electric Lighting Blue Print Reading Mechanical Engineer Yontractor and Builder Mechanical Draftsman Architectural Draftsman Machine Shop Practice Concrete Builder Iailroad Positions Structural Engineer Gas Engine Operating Plumbing and Heating Civil Engineer Chemistry ©) Pharmacy Surveying and Mapping Automobile Work Metallurgy (J Mining Navigation Steam Engineering Agriculture and Poultry Radio © Airplane Engines Mathematics Name Street Address City Oecupation a - Persone residing in Canada should send this coupon to the nterna- tional Derrespendence 6 Schools Canadian, Limited, Montreal, Canada, Picase Mention Popular Mechanics Now he’s General Manager and.

DRAW THIS SUMMER Cartoonists Trained by W. L. Evans MAKE MONEY — of the cleverest cartoon- ists in America today ar former students. They studied during their spare time and ar now making good money. Car- toonist Evans’ system of teaching is SO simple, easy and practical that it is not hard to learn to originals. The school has a long established reputation and recommended by well-known toonists because they knoy students are handled right. If you like to draw, send us ; sample of your work, either a copy or an original. You may have mor ability than you think. We wil send you:a: portfolio of cartoons and full details about the schoo The course is not expensive. The W. L. Evans School of Cartooning 821 LeaderBldg., CLEVELAND, OHIO LEARN WATCHMAKING and become independent. Good-paying positions secured Exsy to learn. Send for ea > — T ne OG st. Louis war< WATCHMAKING SCHOOL,

ST. LOUIS, MO

leather-gold edges, and four ry bearing Show Card Pens. Sent postpaid $3.00. (C. 0. D. 10c extra.) Ogilvie Pub. Co., 57 Rose St., Dept. 50, H. ¥. City EARN MONEY /MMEDIATELY- WE FURNISH EQUIPMENT TO START” TRI-STATE COLLEGE OF ENGINEERING Makes you a Civil, Mechanical, Electrical or Chemical Engi! in two years, 48 weeks each. No entrance examinations. Hig School Diploma not required. Compact courses made up of esse! tials only. Expenses low. FOR CATALOG ADDRESS 100 M. Street, Angola, Indiana The Key to Success

Mind a File—Not a Pile The Key to Success is the ability to remember. I can make your mind an infalli- ble classified index from which you can itn- stantly select thoughts, facts, ficures, faces. Enables you to concentrate, develop self-control, overcome bashfulness, forget- fulness, address an audience. Easy. 20) experience developing memories ct thous . for free booklet, ow to ! Write Today member,’ and Copyright Memory Test, and how to secure Free $3.00 book, “How to Speak in Public DICKSON MEMORY SCHOOL Dept. 705-X Evanston, I!!

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POPULAR MECHANICS ADVERTISING SECTION ER @Learn to Play ‘enoxacin anes TeNEW PHONO EY Bh intestine rtoon- snd I io bandelia, | {. Schneider ay are . studied nd are nt $25.00 iNSTRUMENT Car- pupil in each locality. of any one. Only § harge for lessons—a actical few cents @ week your only ense Success Guaranteed -aching ” : raw wu, Nothana. fIALES-IN ONE COURSE} a tong ae SCHNEIDER’S SIMPLEX SYSTEM ian . i ONAL INSTRUCTIONS — 12 complete lessons on vA Car- R is e + Combined Course teaches all three instruments p one A-B-C, You can play any of these instruments the ' 1ys “Play for Money tn 2 months. 30,000 have lea fully. Some are now playing in orchestras, at wed- parties and church socials, Be popular —save months of » Phonograph Way. ad us a 7 . 7 Get First Record FREE—5 Days’ Trial a CODY ¥ you, absolutely free, the first record for 5 Days’ Trial. ‘ . j will enable us to protec t you on free Instrument in your ye more ‘ ee for yourself how easy and sae it is to learn to V A Just fill out coupon and mail y e Wi How would you like to earn two or three dollars every evening _— » SE ND NO MONEY—JUST SEND COUPON *==48°4 after school and prepare yourself for a fine big job at the rtoon rof. Schneider, Director Schneider School of Music »? re’ e op: un : » > ell toons 28 Vern ‘ont St., Blue Island, Ill. (a Suburb of Chicago) —— Here + F port —s a life time for you fellows schoo ia e FREE and PREPAID, for 5 days’ free trial, your first lesson who like Elec tricity. Begin right now to prepare yourself for os A “ plete information oa course, ead how I can sscure s musical a regular man’s size job in this fascinating field. Your chances . . le nr I dec’ je or" ord . > . “Himatitnhntiw=ha&a“.'—.' on for a big success are simply wonderful—the pay is big ($70 to _ ai $200 a week) and advancement comes swift and sure. tooning eDDRES ; ra pat: I Will Train You at Home WR ITE JOKES © Socks Wrimee] ek SL, trees: seers, ime, ice I have trained hundreds of other boys Subieners my A _ $1 to $6 aptere for joes, This Boy who are now big successful men. It wil . sus and humorous stories. | ‘Tremendous is camcory not interfere with your school work and earn good salaries. Our course in Humor seat eorg> the} you can earn more than the small cost o eaches you how to originate ideas for ing to © close, and the course doing odd electrical jobs ir ms, stories, Learn in your spare time am pretty busy with} your spare time. The Course pays for ir spare time. Markets furnished. 1] itself. I will show you how to get this work Write for Information ] and how to do it. Some of my boy AMERICAN INSTITUTE OF HUMOR “1 eueee I forgot students make $10 to $15 a week this way Office J, 414 Park Bldg., Cleveland, Ohio be, tuskeoms tor_r- wt Am tem oe | TOOlSs, Apparatus and but owe it all t Ter dexter ie) Radio Course FREE under age Send me the coupon below and I will tel you all about the big outfit of too ap paratus and instruments and a new "7 acd ; Course that I am giving to my students tor — Wat h J 1 k pare time work "| a limited time I will send you my big c work, ewe rywor “I went out o interesting Electrical Book and a sampk and E A fine trade commanding a good ot gig gga ogg lesson, too—all Free You will be ngraving. salary, and your services are always made $3 and bre tickled with the things I will send you Free in demand, Address Horological, aoe at > 50 | ~Mail the coupon right now Vent. P, Bradley Institute, PEORIA, ILL., for our latest catalog 5 o 4 how pork aud po mater) L. L. COOKE, Chief Engineer ROGER kMITH * Commercial, Newspaper an zine ustrating, P y ms. Our simple naked aA ~ - —y te your Hy in spare r Local Classes. Write for terms and list of successful Students. ‘ART sTubDiIos 87-8 Flatiron Building, NEW YORK + 1215 Chestnut St. Chicago Engineering Works ot. oe ——— J Dept. 51-A CHICAGO BECOME A Use This “FREE OUTFIT” Coupon RAILWAY MAIL. CLERK § | { u 2. cooxe, cuter tasincer, Examinations soon. $1600 to $2300a year. § | — — ee a an ! . $1- Lawrence Avenue. Chica wa serie wd lockouts. Common education cas me y I Outfit ( ag r, your big El ri 1B te. penc e your ree e ot g ectrica OOK, StRt Ret keeeeeeee sufficient. No pull’* Sample Lesson and particu s of your Electrieal Course and ' an in Pat necessary . Mail Free Radio Course. This w itl not obligate me in any wa ] a, terson Civil Service School ® coupon for cat- foreet. Dept. 86, Rochester, N. ¥. — i O years Sirs—Send me without el Name... 1 - alg, de ‘scribing this and other fi fine *, — aca I ighted * “overnment positions. Rochester, Address ' - For use ot boys 15 years old or mort JOOL Nome... eee eccrccccccecccccesocesesees ® wei in acne nr Rhee Dd irene on, ill ee Address te Rewer eerecerssessoesseseseeese Please Mention Popular Mecha)

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POPULAR MECHANICS ADVERTISING SECTION t Into QMOBILE BUSI The Great opportunities in this wonderful business are continu- ing and growing. This year will add three more millions of cars to the twelve million now in use. Think of these millions of cars to repair! Think of the millions of tires, batteries and electrical sy tems to keep in running order! You can quickly realize WHY the Autom Business is THE Business to get into. Every where you go you see the need for better garages, battery repair shops, tire s| welding shops to do all this work. If you are a wide-awake, ambitious man, can you think of a better business to get into? Beg trained man, so that you can have a business of your own, and do the service work on these ears Make ‘°2000 to 510,000 Yearly Some of our gr: dus ates do even better. Big auto factories, garages and service stations continually ask for M. 8. A. S. Trained Men. We cannot fill one-third of the calls that come to us. The man who comes to the M. 8. A. S. has a FACTORY ENDORSED TRAINING which will get him a job anywhere. Prepare yourself now for one of these {good jobs, or to have a business of your own. Start Course at Home and Complete It Here ENROLL NOW FOR OUR HOME STUDY COURSE You can start your training without waiting until you can come to Detroit. Our Home Study Course is now ready after two years of steady work on it by our faculty. You can study autos at home under the personal supervision of our experts,then come here for shop prac- tice later when you can. But in the meantime you can be making a start. Send for the detailed outline of these lessons, and our 100 page illustrated cat- alog showing our shops and equipment Both are finest institution in the country In fact we endorse its method of instruction because it ranks highest in the standard of a : the ment and personne! is second to none iis schoo! is meas State thought very highly of by the automobile men A utom obi le Detroit You will make no mistake by entering School.” what the for a course. ¢ akers sav STUDEBAKER — “The Michigan State Aute- ° u t be mak¢ rs 8a mobile School at Detroit conducts a very goot about this School, the only school, in fact we do not know of a better saute school which the -y endorse: mobile school than the Michigan St at PACKARD —“ Do not:believe vou THE AUTOMOBILE JOURNAL — “The Mie , “ ; ‘ igan State Automobile School todas would make any mistake in attend- by those who know, to be the greates ing this school if you wish to of its kind in America. It is endorsed t c become thoroughly experi- ing men in the industry A fist-class sutomobilt enced in the Automobile momneme is in Comans onee and -— always caro x . a salary consistent with his knowledge business. Have no hes- We do not hesitate to recommend the itation in recom- mending it in Be a WINNER! Get Started! every particu- Fill out and mail the Coupon lar. NOW-—TODAY! euien = Michigan State “ We believe the Michigan Dept. 306, 3729 Woodward Art. State Automo- . bile School located Detroit, Mich. at Detroit would best meet your requirements as its courses in technical training are most thorough and complete in every detail.”

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ito? Bea these cars rly continually The man him a job your own. ere Hundreds of M. 8. A. Is f letters we get: isy these days lots of repair work. vorking forme. Iam just past | was seventeen when obile course at graduates are in business for themselves all over the world. You can have a shop of your own too. With 12 million cars to repair there is a crying nee d for good garages, bat- repair shops, electrical service my ai hes shops, and welding _— t means success to train at the M. 1 Detroit, the Automobile Center. “LTbhave been in bud ness now for myself about three years we What Our Graduates — POPULAR MECHANICS ADVERTISING SECTION 53 full of letters from men who have taken our training Courses ! w making big money in the automobile business for are several cara’es here in a little city of about 2,000 and we get all we can do all the Read these —they are typical of the time. We also employ two men, beside overtime, so you see we are getting our share —W. F. Dahnert, Neillsville, Wisc. “Tam now foreman of the shop where I work, and am making good wit Capital G I have doubled my salary and am also turning out far better work thar 1 did before taking your course.” Mervin B. Gill, Kimberly, Idaho * to -our sebool, Iam ‘It is four years last month since I Have been in the garage here for 2 year rfour times the money | finished the two courses at your school and 7 y wa hare dee n increased % b ying there, and I feel | Have not had a single job I could not Rob ; X, B : _— "ea Roc Pa ted to you and the facul- | master. Have saved $100 every month an nd ae . ‘Nn er eo od awe rae nen _ HUDSON- I} od job with the Tagze-.| since I got home. I give M.8.A.S im making $250 a month rhe ae M Tazewell, Va ont am | credit for my success."’ expense 0 » School is —J. O. Crega —J. I. Mayes, Kansas. elson, Reedsville,N.( ur on of ite kind Mone et we endorse n y- cause ft ran You Can Be AAS Successful As These Men is. Its equip Back This school # ring your school was earning $12.00 per week. *‘ Have worked with men who } ad fif teen years mobile men of nothing about automobiles. “Since I left | experience, but my M.38,. A raining put me Guarantee e by entering e worked up through several positions, last | up with them, and sometimes ahead of then $300 per month. Then decided to go into the | If L had it to do over aga in would be to M We gu = . f. Present earnings are $500 per month.’ |S. A. S. ten years ear hat i ute of 1 oe —H. 8. Bradley, Ohio. | J. R. Navarre, We , Au bile ar a ve Wy yr ¢ ewi a beter sate Train for Success — Let Us Help You—Start Now! ied to Ail a — “The Mict- » YOU! If you want to get ahead, you must act. Our train- ester, r¢ 1 is conceded ely wt] you. One of the great advantages in coming to the M.S ‘ ‘ est institution you get a long thorough course, learning everything in deta Men v man or ¥ di by the hat they cannot learn the Automobile Business in six or eight n fee. ss automobile au tud three f t ades at the same re. Es ve and abil given enough time to learn it properly. ‘That kind o eee er] ze eM. 8. A.8.” ‘ lr RAINING is the M. 8. A. S. way. ‘ arted! Show Your Grit — Take This Opportunity Send This Coupon Today! Upon you never hadachance. A Big One faces you right Michigan State Automobile School w! Se r our ieee illustrated catalog! Decide now that Dept. 306, Detroit, Mich. to the 5. A. 8. as soon as you hear from us. p m: Send me vour FREE Catal rventieme send me yo t atalog te all about the opportunities tr he Auto Busir d tutomobile Sch Courses and particulars of your Home Study Course whict 00 will enable me to start my raining at om Also in Vrite or Print Name Plainly odward Ave. troit, Mich : oo GU a ae Welding and Brazing Tire Repairing—Machine Work Name Street or R. F. D City State

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POPULAR MECHANICS ADVERTISING SECTION tO 9 School at Ho High School Course in Two Years! Lack of High School Training has kept thou- sands of men and women from attaining business and social position. Without this training you are absolutely barred from a successful business career, from leading professions, from well-paid civil service jobs, from teaching and college entrance. In fact, all preferred positions are closed to you without this vital training. You can’t stand this heavy handicap nor do you have to. The American School can give you the valuable training you missed. ou ie) ur Put Your Idle cimplined fiigh. School Hours to Work (y'sircime study, Then you will be mentally equipped to handlea worth- while position. Thiscourse, prepared by some of America’s leading professors, will broaden your mind, give you a wider outlook and make you keen, alert and “capable. Remove Your Handicap Whether you need High School Training or specialized mstruction in your chosen line — NOW is the time to remove your —— You must know the short cuts and efficiency method ou must know the HOW and WHY. Over 50,000 students owe their success to training received from the practical, money-making Courses in the poomeee below. Let us tell you about this training — about the Course you are interested in. Check and mail the coupon. American School Dept. H.A.74, Drexel Ave. and 58th St., Chicago American School Dept. H.A.74, Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. Architect Lawyer Building Contractor «+++». Machine Sho ep Brastice mobile Engineer «+--Photoplay Writer ° “Automobile Repairman Mechanical E «Civil Engineer --+.. Structural Engineer Business Manager Cert. Public Accountant Accountant and Audi

egraph High Set School aicaeate ‘ Fire Insurance Expert Wireless Undecid

Please Mention Popular Mechanics

LEARN BY DOING Every phase of all branches of % ELECTRICITY Taught by Actual Practice In America’s foremost and oldest institution for trade training No Books Used Individual Instruction Start Any Day A SPECIAL and SEPARATE Course in Ignition, Auto Lightin ng and STARTER Sys- tems. Write for FREE 64-page catalog. THE NEW YORK ELECTRICAL SCHOOL 44 West 17th Street, NEW YORK CITY

You Can Learn How to Swim 4 No matter how awkward you are in the water, WZ can positively teach you to become a good swim- / mer. Remarkable simple course, // guaranteed to teach you how to swim and attain confidence in the water. Unusuel instruction system con- / sisting of 25 lessons, every movement | < thoroughly explained and lustrated. i BRUCE SWIMMING METHOD, Suite 339, e. Lt = 30 Church St. Dept. J. New York RAISE DOUITRY FOR PROFIT We teach you how. Easily learned at home. Our guar- anteed methods make success certain—indorsed by leading Agricultural Colleges. Sen ad T DAY for FREE E BOOK— H ow Te Why a Dancers Are Popular . VERYONE admires and wants to dance ~~ with the person who poems the latest steps. There is no need of being a waill- flower! By my remarkable new easy method, anyone can learn the newest dances at home in a few hours. Much less expensive than from & personal teacher. No music or partner needed. So simple even a child canlearn ¢, quickly. 90,000 have learned dancing aes matl. Your own success is guarant To prove I can quickly and easily make you an accomprfished dancer, I will send FREE, in plain cover, a lesson in Fox Trot, of Leading, How to Gain Confidence, How to Follow and How to Avoid Embarrassing Mis- takes. To help pay the cost of handling, mail- ing, etc., send 25c. Learn in private—surprise your friends. Act now and be a good dancer soon! N ARTHUR MURRAY, Studio 768, 290 Broadway,”

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~ all CITY Practice and oldest . training Jsed ‘uction Day EPARATE on, Auto TER Sys- -E 64-page . SCHOOL YORK CITY / E a YA $2.00. toon if mot pleased. ur guaf- reed by -nd TO- iow To Profit.” nstitute mn, DG j away, N.% POPULAR MECHANICS ADVERTISING SECTION iENC TES id wANOM PONTR~, . Pe ——, aN INES MECHANICS}: SHEATING EY REFRIGERATION |’ tiiva = UDEL'S ENGIN: and MECHAN ICS Your, THE BOOKS YOU HAVE BEEN WAITING FOR 4750 Pages—8754 Illustrations Just completed —Audel’s and Mechanics! tvery Engineer, Mechanic and Electrical worker will Welcome this set as a sure source of advancement and higher pay because of the comngiete up-to-date information that is roughly and easily explained on every branch of Engineer- ng and Electrical practice. Why a $10,000 Library? Because it would cost the reader more than $10,000 toget a with years of labor and experience collect, plan, arrange and prepare for his own otudy and rad y reference, the vast fund of knowledge printed in this er Set tae entire set costs you only twelve dollars—knowledige truction that has cost thousands of dollars and years ume—yours for $12.00—$1.00 a month. Study This Brief Table of Contents ractice and Operation of —Construction of | were of Boilers, ¢! LL Steam Engines, Valve Motione— (THE Latest PRACTION)— bell: — La SE TING; compote — Construction— Mechanica! Stokers L engin d <i Dare pee New Master Set for Engineers structions an: yal : care and repe Castaation. FIR of ives, Fittings “| cee | Fitsing— Hien = and Ventils- ‘Towers “2 a Kyparaton and Machinery— Ropes and Cablee— Eplic- i ng—electric wiring in All branches; compendium practical electrica as an sid for engineers electricians in obtaining « ‘icense Ss? chaptere—ready reference index, co2 covering entire field cf Modern 2 of Boilere—Materiale Electricity .

por Smell 7 Reference SS eT ANTAL SESS <= SRST t Send No Money—Send Only This Coupon THEO. AUDEL & CO., 72 Fifth Ave., New York City Please submit me for free examination, AUDEL’S 810,000 MASTER SET FOR ENGINEERS AND MECHANICS Ship at once prepaid, the 8 numbers, total cost $12.00 If satisfac tory, I agree to send you $1 within seven days and to further mail you $1 each month until paid. Name. PM June 2

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POPULAR MECHANICS ADVERTISING SECTION Learn Illustrating At Home—in Your Spare Time from the school that has trained many com- mercial illustrators now earning $50 to $200 or more weekly. Plenty of opportunities open» for trained artists. Work can be done at home. The Landon Picture Chart Method makes original drawing easy to learn. Send 6c in stamps for full information and sample chart. Also state age THE LANDON SCHOOL 138 National Bidg., CLEVELAND, oO. Stet Ml Mount Birds We teach you by mail to stuff and mount all kinds of Birds, Animals, Game Heads. A\so to ta» skins and make mgs. Be your own tarid Decorate your home with your beautiful trophies og increase your income se!ling specimens and mounting for others. Easily, quickly learned in spare time by men and women. Highest endorsements by thousands of A practical course that will help every man in the building trades 7. building trades are booming. There is a shortage of trained men in many lines. Men who can read blue prints are especially in demand. | Vietin, Hawaiian Guitar, Ukulele, hee 2 4 Guitar, Mandolin, Cornet, Banjo-Ukulele, Tenor Banjo or Banjo It isn’t hard to learn to read blue prints if you go W onderful new system of teaching note music by mail. To first -. ¢ . , r . : pupils in eac ocality, we give a $20 superb Violin, M h, about it in the right way. You can learn right at Ukulele, Guitar, Hawaiian Guitar, Cornet, oan nondoes awd home in spare time, through the International Cor- | Solutely free. Very small charge forjessons gnly. We guarantee suc- . no charge. Complete outfit free. Write now. No obligation ° . cess or respondence Schools, without losing a day or a dol- SLINGERLAND SCHOOL OF MUSIC, Inc. Dept. 214, CHICAGO, ILL. lar from your present work. P Through this course you not only learn all you Fa i poy Magn pene need to know about building materials and specifi- ao penitions out tis ii cation writing, but you work on actual blue prints a =

—the very same blue prints a contractor would re- ceive if asked for an estimate, or a foreman would receive from a contractor, I ee 1 h ° . according to cur Guaras aise Bona té dase = n a surprisingly short time you can 8 gar a sany me. Wo furnish alt text clean, Yorn : ‘ a lnpipting, Soma knowledge of blue prints that will be of great value Tolume Law Library, Get our valuable s . efore me a notary sublic in and wv the etat unty revaid, ft Salesmanship Business Management appeared H. H Windesr, whe cooker one dot Guaeen. mean «, deposes, and Advertising Industrial Management says that he is the editor and business manacer u Popu echanics Magasive Better Letters Personnel Organization and that the following is, to the best of his knowledge and belief, a true ets ent of } 4 f, te & wn Foreign Trade Traffic Management ownership ger . , of the aforesaid publication for the da mm in : above caption, require , of August 24, 1912, embodied in sect 443, Posts! nay FHI Typing ~~ — | a Laws and Res 8, DI eve of this form, to wit First. Thet the sines a ng an anking ww e . rer or, managing itor, and business m™ “ Civil Service Accountancy (including C.P.A.) ; upuige Mechanien Co. 350 Eng Opiacio Ri... Cease, mM... . w, 2 Las » io St., Chicago Man editor, J malbwey Mall ‘- . Nicholson Cost Accounting 200 East Ontario St., Chieago, Il. Business Manager, H. H. Windsor, 200 East Ontare Bookkeeping 8t., Chieago, Ill. Second. That the owners are [Give names and addresses ndividus - School es Private Secretary owners or, i 2 corporation, give ite name and the names and addres { stock -4 ustra’ ‘arteonl owning or holding 1 per cent or more of the total amount of stock): 1. We r ting 0 ng Business Spanish a) French last Ontario St., Chicago, Ill.; L Windsor, 200 East Ontario St as N H. H. Windsor, Jr., 200 East Ontario St., Chicago, Ill; First Trust and Sev ame... . Trustee for H. H. Windsor, Jr., Chicago, Ill. Third.| That the known bon Btreet mortgagees. and other security holders owning or holding 1 per cent or re Address amount of bonds, mortgages or other securities are [if there are none # sts) Scecconvessees wader covers cecssc cece ceense socesees ence Fourth. That the two paragraphs next above, giving the names of the City holders and security holders, if any, contain not only the list of stoc! 4 : soere security holders as they appear upon the booke of the company, but alec the stockholder or security holder appears upon the books of the comp* Occupation en “4: or in any other fiduciary relation, the name of the person or corporst nee ee such trustee is acne. is given; also that the said two paragraphs con's Persons residing in Canada should send this coupon to the Interna- embracing affiant's full knowledge and belief as to the cireumstances * tional Correspondence Schools Canadian, Limited, Montreal Cancda under which stockholders and security holders who do not appear ur ” the company as trustees, hold stock and securities in a capacity other ¢ bona fide owner; and this affiant has no reason to believe that ow other per tion, or corporation has any interest direct or indireet in the said stock. ' qequriticn than as so stated by him H. H. WINDSOR Editor Sworn u , . P me, this 2 y t 23 } Notar *ut Picase Mention Popular Mechanics ss os mgr gt ont iy tala lelleeaamaaas bind

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POPULAR MECHANICS ADVERTISING SECTION Nomatter what your occupation,one of the home study sets listed below SS will quickly fit you for a better job and bigger pay. Any set you select will be sent for seven days’ examination, and if you decide to buy, you may pay the rock-bottom price at the rate of only 75c a week. But you must act now! When our present supply of paper and binding materials, bought at pre-war prices, is used up, production cost will be greater and we will be forced to increase the price. These books are the work of recognized authorities. They are written in plain, easily under stood language by recognized authorities, and contain hundreds of photographs, diagrams, tables, etc., that make dif- Pe ficult points as sim- e e ple as A-B-C. Hand- ww R B k a somely and durably ay = alsing oo ~ andolin, bound in half or full anjo ab- = = tee pur morocco leather At Greatly Reduced Prices 60 ILL (except as noted), Business Management. 8 Steam and Gas Engineering Machine Shop Practice, 6 - and stamped in | ¥ols. 2500 pages, we'lillustrated. —7 volumes, 3300 pages, 2500 pic- volumes, 2300 pages, 2500 pie- OME gold Was $52.50. Now $29.80. tures. Was $52.50. Now $24.80. tures. Was $45.00. Now §21.80. wyferer Law and Practice (withread- Telephony and Telegraphy roe D 9 Electrical Engineering —8 ing course, and standard legal —4 volumes, 1728 2000 blie lif volomes, 4100 Pages, 3300 pictures. ; . c life on t Was 900,00.” Now $29.20. forms free) 12 vee pages. ictures. Was ee Now 14.80. mtry and Contracting, Fire Prevention and In- Send 6 volumes. 2138 Pe 1000 pie- Voutilating Heating ona surance, 4 volumes, 1500 pages tures. Was $27.50. Now $19.80. pages 1400 pictures. Was $30.00, seeploveres. Was $30.00. Now Automobile Engineering, 6 ‘N° $14.80. y oney volumes, 2600 pages, 2300 pic- Civil Engineering, 9 volumes, Drawing, 4 vol ‘ tures, diagrams Was re 00. 3900 8. 3000 pict A sap illustrated. Was $49.80. umes, 1578 etc, . ures. Was pages,1000 pictures, bive-prints, 86. $67.56. "Now $34.80. ete. Now Biase J a Shipped for 7 Days’ Examination Yes, we'll gladly ship any set right to your home or office upon your simple request. Pay only shippin charges when the books arrive. Don’t send a penny unti after you have used them 7 days, then remit only $2.80 or return them at at our expense. Pay balance at rate of $3.00 a month—75c a week. Act now—while these splendid books are being offered at 20 per cent to 50 per cent less than regular prices. This offer is open to every person within the boundaries of the United States and Canada. Grasp your opportunity—fill in and mail this coupon NOW ! American Technical Society, Dept. X19A, Chicago, Ill. ZU RR RRR ERR RRR American Technical Society Dept. X19A, Chicago, U. S. A. Now $21 Please send me set of for 7 days’ examination, shipping charges collect. 1 will examine the ks thoroughly and, if satisfied, will send $2.80 within 7 days and $3 each month, until I have paid the special price of $... = f I decide not to keep the books, I will notify you at the end of seven days and return them at your expense. To insure prompt shipment fll out all lines Name Address. Employed by

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POPULAR MECHANICS ADVERTISING SECTION Trained Men Earn 550 to 5125 a Week GREER Special Summer Course offers you chance to learn complete Automobile Mechanics in just eight weeks. Good jobs waiting forGREER graduates. The pay is BIG—$50—$125 a week! Opportunities in all sections of the country. Automobile business is booming. Count the cars now in use. Every one you see is a prospect for the mechanic who knows how to repair an automobile the right way GREER training puts you in the “Know How” class. You learn through practical experience with real motors. Course inchades: Truck, Tractor and Automobile Repairing, Automobile Driving, Roadside ‘Repairs, Primary Ignition, Electric Light- ing and Starting Systems, Vulcanizing, Machine Shop Practice, Shop Management, Selling, etc. Employment Guaranteed Demand for men so great we can now guar- antee you a job that will pay ving expenses and even more while you are learning! G R employ- ment department flooded with openin Then witha GREER diploma, you can quickly qualify for a perma- nent position at good pay,or go into business for your- self. GREER Summer Course is your special oppor- tunity! Now you can get complete instruction at greatly redaced cost. Write for FREE BOOK Learn what GREER has to offer you. Our FREE BOOK “How to Succeed in the Automobile Busi- ness” tells all. Start today for a Better Job, Big pay and Permanent Employment! Mail coupon at bot- tom of this column. COLLEGE of Automotive Engineering” 2056 S. Wabash Avenue, CHICAGO, U. S. A. Mail This Free Book Coupon ERWIN GREER, President, Greer College of Automotive Engineering, 2056 S. Wabash Ave., Chicago, Ill. Send me your Free Book, “How to Succeed in the Automobile Business” and Special Tuition Offer. Please Mention Popular Mechanics New friends, new pleasures, new and intere periences, invitations galore—dinners, dances, w: parties, outings,—are some of the good things pla Gibson brings into your life. 7 G Instraments are easily learned in spare time without previous know edge of music. A few weeks of pleasant, inter: study and you'll be abie to play. nd there's nm ‘ joy in life quite equal to hearing music you make on vour own instruments. buys a Gibsern. The ultima $5.00 Monthly in construction, finish, tone quality and volume. Built like a violin. Adjus bridge, non-warpable truss rod neck and thirty ot! exclusive Gibson features. Guaranteed for life. Gibson instruments exchanged. weekly selling, playing, teach. = Make $25 to $200 ing. Own a bigh Class, exclu- sive business. We furnish stock, advertise, help sell, carry = accounts. Gibsons easily sold on confidential credit pian Send for FREE catalog, FREE music and infor: about Mandolin, Mandola, Mando-cello, Maudo-t Guitar, Harp-guitar, Mandolin-banjo, Tenor-ban jo, C: banjo, Guitar-banjo. n Agency, check ! wsyin'y 3 ¢'e. 00 ig ae Clip, cheek and 1: this ad today. Address all mail to Kalamazoo. GIBSON MANDOLIN-GUITAR CO. 1586 Parsons St. Foreign Dept K. amazoo, Mich. 25 Broad St., N. Y. City MAUNA LUT Write quick for our FREE st Aa (UWI wy) remarkable offer. Learn NOW at home, in spare time, by new instruction methed. Cor Cartooning, Tllustrating, | gnieg Delightful fascinating work in big dema: .00 paid for ene drawing Handsome k free explains everyt! SEND FOR IT TODAY TON SCHOOL OF ART, Inc Bidg. Washington, 0.¢ ert Auto Painting , There is Big Money im aut: i refinishing. Our Home Study Cours in Practical Auto Painting you to do the finest work a wages. Wonderful oppertuni' money-making business of your ow | lar telis all about big new FREE gree Spo ctor hota CHICAGO COLLEGE OF AUTO P AINTIN ——— Paint.n Dept. © E. Jackson Bivd.. CHICAGO, U.S.A Sure Rupture Comfort BE COMFORTABLE—W ear the Brooks Appliance, the modern scientific invention which rupture sufferers immediate reli has noobnoxiousspringsorpads. Auto- matic Air Cushions bind and draw to- "sp. ¢, £. BROOKS gether the broken parts. No salves or : h lasters. Durable. Cheap. Sent on trial to prove its wort Hover on sale in stores as avery, Seeeense is made t the proper size and shape of Air Cushion dependit nature of each case. Beware of imitations. Look f mark bearing portrait and ture of C. E. Brooks * on every Appliance. one other genuine. Ful! rma pears tion and booklet sent free in plain, sealed envelope. ‘ BROOKS APPLIANCE CO., 126) State St., Marshall, Mich

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POPULAR MECHANICS ADVERTISING SECTION

pay your railroad fare to Chicago—the/Electrical Center of the Wor —from any place-in the United States. Grasp this opportunity to see the country at our expense. Don’t stick in one rahe —get experience. Come to Coyne—learr‘electricity in 3 months/ Fit yourself for a big paying job. ‘> The largest~electrical school in the/country specializing in electrical (/_, \) instruction only. oe Get a complete training-So you can make big money as Power Plant Operator, Superintendent, Telephone-man, Construction worker, auto, truck or tractor electrician, battery } radio expert, or you can go into business for your- self as electrical contractor, dealer, auto ignition or battery expert and make from $3,000 to $20,000 a year. Hundreds of our graduates today are making vem ae big money and/you can do the same if you grasp this opportunity—act now. go0@ on Great Shops of Coyne RT, Ine ) vat ) © No books or useless theory. You are RADIO COURSE FREE. We include the ‘ting zptrained on $100,000 worth of elec- Prine fee with the regular course: ae : : complete course in auto, 07 Sez ro equipment. Everything from electricity and storage batteries. Greatest a pL door bells to power plants. You work outlay of auto, electricaJ and battery equip- ~ Be 4e4-6n motors, generators, house-wiring,. ment in the country. ut own Ay 3 -y¥{8 autos, batteries, radio, switch-boards, {JJ Course’ in Radio— the marvel of the age. S000 Te mien > Power plants—everything to make Constru Monesota// you an expert ready to step right into pega <n: termpangrandeee pega” AINTINe hen antes te (3) A life scholarship in the Coyne school. You } GO, U.S.A a pos paying m can stay as long as you wish and return for —s $45 to $100 a week. further training at any time in the future ’ . Earn While You Learn? We help students to secure

- . y Course Jobs to earn a good part of their expenses while studying.

Send Coupon = B. W. Cooke, Pres., Coyne Electrical School Don't delay a minute — send that 1300-1310 W. Harrison St., Dept. A-935 Chicago, IL coupon right fi catalog ~ ieiamsedlite Dear Sir: Please send me free your big catalog and ful Railroad Fare offer. Re er dai particulars of your special offer of Free Railroad Fare : rape and two extra courses. Special offer is limited so act now} Student ‘Winding e Stator

1300-1310 W. Harrison St, Dept. A-935 Chicago

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POPULAR MECHANICS ADVERTISING SECTION BF A RAILWAY TRAFFIC INSPECTOR The Most Pleasant Work I Know of By L. P. Reifein “T have been employed as a Railway Traffic Inspector for several months now and since the first day I began studying the course, an entire field has been opened up to me is the most pleasant work that I have ever had the good fortune to be en- gaged in. “IT was employed as a passenger brakeman on one of the largest R. R. Companies, and when the Business Depression came into us in spring of 1921 I was suspended on account of reduction in force. Whereas this position is permanent, and without the wonderful course prescribed, I would have never been able to be engaged in this line of work. “This line here extends from the state line of N. H. to state line of R. I., being 15 divisions, and the ride of today will not be the one you make tomorrow. They cover the whole Eastern half of the state of Mass. “Another great thing, you are practically your own boss, and deal only with best of men in this I'ne of work. “T owe a debt of thanks to the Standard Business Training Institute for the great opportunity derived from their course of study where ancements are unlimited.”’ Position Guaranteed Earn Up to $250 per Month, Expenses Paid Prepare in three months’ spare-time study at home for this fascinating profession. Many opportunities for advancement: many men are needed. Steady, pleasant outdoor work; travel or remain near home. You Take No Risk After completing course if we do not get you a position paying at least $110.00 a month and expenses, we refund your entire enrollment fee. Cost is moderate. Send coupon today for full details Standard Business Training Institute Buffalo, N. Y. Aerial Photo Taken by Dan I Kiser LEARN TO FLy $100 Reduction for Short Time First clase air pilots, with special training in Aviation Me chanics earn $5,000 a year up. Ope rating companies’ demand for specially trained Pilots, Field Managers, Superintendents and Airplane Mechanics growing every day. Mr. Dan Kiser late of U.S. Air Mail Service and Army Flying Corps, will train you ‘thoroughly in all branches of this profe ssion and fit you for pilot license. Special Rate Now in Force For a limited time you can secure this training fittin fully for the greatest red-blooded profession of them big reduction in the cost of tuition. Write at once for ticulars sent free and without obligation. Address: DAN KISER, Chief Engineer Dept. F 1, S & H Works (Aircraft Div.) 1422 W. Monroe Street CHICAGO, ILL. Never before such a ck skilled Draftsmen and Bui perts. More big jobs men to fill them. TRAIN BY MAIL Let Chicago “Tech” give you ing that brings quick advance a high salary. Send for inf CHICAGO TECHNICAL COLLEGE 630 Chicago “Tech” Bidg., Chicago Seneca rencseed Drafting Plan Reading Building GO UU N MAKE MONEY CHALK TALKING. SEN i PROGRAM OF TRICK L Se NGS ‘ad y PROFESS: WAL CART (SF SATIS FACTIC C/ACULAR FREE BALDA ART SERVICE, QI, OSHK Wonderful opportunit ~ stantly offered trained men you thoroughly to start business or make good mor tor expert, driver, shwp for: 7,000 Graduates making good. Catalog Free Say in am an aon on a a Cleveland Automobile School, iBi4E, 24th St., Cleveland 0. Standard Business Training Institute Buffalo, N. Y. Send me, entirely free, Booklet No. D-63, giving full par- ticulars about course in Railway Traffic Inspection. Earn while eran a Most ate watch school Individual instructions. Graduates in great demand. Book re. Chicago Schoo! of Watchmaking, Dept. 20, 4840 Lincoln Ave. ,Chicags TAMMERER@ cured by our course of | wey emit my lessons. Write today booklet, ‘‘How To Stop Stammering.’ SA JEL A. ROBBING, Director, , , ; > » : Boston Stammerers’ Institute, Founded. 1867 Please Mention Popular Mechanics 246 Huntington Ave. Boston 17, Mass.

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& ime on Me lemand ‘ndents s, will and fit POPULAR MECHANICS ADVERTISING SECTION and Get This Rule FREE AM anxious to find men with desire to become draftsmen. With business pickin be need pe eve up everywhere many thousands of draftsmen will at salaries ranging up to 33. person 16 yeare or older sending a sketch I am going to mail prepaid the 000 and $3,600 per year. Draftsmaa’s Ivorine Pocket Rule shown here. Tei will come to you entirely wi my compliments. With it I will send a 6x9 ested in 9k on “Successful Draftsmanship.” If you are inter- g a drafts man, if you think you have or may attain drafting ability, sit down and copy this drawing, mailing it to me today, write your name, and your address and your age plainly on Salaries up to the sheet of paper containing the drawing. $250 and $300 a Month Tam Chief Dreftemen of the Engineers’ Equip- ment Co. and I know that there are thousands of ambitious men who would like to better them- selves, make more money and secure 5 faster ad- vancement. Positions paying up t to $250 and $300 per month, which ought to be filled by skilled draftsmen, are vacant. I want to find men who with practical training and personal assistance will be qualified to fill these positions. Noman can hope to share in the great coming prosperity in manufacturing and building ~~ he is properly trained and able to do first class practical work. F this $25 Draftsman’s Working Outfit These are regular working instruments—the kind I use Doane I give them free to you if you enroll at once. *tdelay. Send for full information today. I know that this is the time to get ready. That is why lam making the above offer. I can now take and train a limited number of students personally and I will give to those students a guarantee to give them by mail practical draw- ing room training until they are placed in a rmanent position with a salary up to $250 and $500 per month. You should act promptly on this offer because it is my belief that even though ou start now the great boom will be well on y the emo 7 ou are ready to accept a position asa skilled a: raftsman. So write to me at once, FREE $80 Drafting Course To every student enrolling now t sive an opportunity of getting an $80d ing course absolutely without cost ate him. So send in par is ghetch today and jearn all about Mail ‘Your Drawing at Once rate. aace FREE! Pocket Rule Absolutely Ambitious men interested in drafting hurry! Don’t wait! This is your opportunity to get into this great ~ 1 ~- the offer which I am making now. Bend i in r sketch or request for free book and free Ivorine ket Rule. Chief Draftsman, Engineers’ Equipment Co., bis 4-035 chicago

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POPULAR MECHANICS ADVERTISING SECTION Earn $50 to $300 Weekly Auto business on the Boom. Hundreds of Auto P needed. Now is the time to get out of the rut the time to prepare for a better job. Over 400 m have taken our training are making big money. \ do the same. Age or education makes no diff: Ambition and common sense is all that is nec. Start a Business of Your Own n 59) Little capital necessary. Every Village, ever: “Every hour I spent on my L. -6.: &; _ iy oo big ——— for she ae us Au 10 e ustom Shops are fast fol! Course has been worth $95 to me! My the wake of the service station and garage. \ position, my $5,000 a year income, my learn in from 8 to 10 weeks’ time. We teach 5 home, my family’s happiness—I owe it proctinn, Speteodical way on resl Automobiles, | etc. e instructors are men who have ma all to my spare-time training with the mobile Painting and teaching their life’s work International Correspondence Schools!” instructions are Individual. You can start any ti: Every mail brings letters from some of The cost is An | TODAY—RIGHT NOW—write for ours) the thousands of I. C. S. students telling cial offer and catalogue. No colored students ac: of promotions or increases in salary as DETROIT AUTO PAINTING SCHOOL the rewards of spare-time study. 26 D. A. P. S. Bldg., 426 Superior St., DETROIT, MICHIGAN + * SRSESEEEBSERESSESSSEERSRRERERER ERE What are you doing with the hours _— BOSRES wee rt Can ey —— to let them slip by unimproved when you can easily make them mean so much? One Be Your Own eS SG PRU PRU PPR PUPP UU RESESESESRE FLEES hour a day spent with the I. C. S. will prepare you for the position you want. Yes, it will! Put it up to ws to prove it. Mark and mail this coupon now! ee ee TEAR OUT HERE — — — —— —— —— op INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5527-D, Scranton, Penna. Without cost or obligation, please tell me how I can Rinse 4 for the position or in tle subject before which I have mark BUSINESS TRAINING COURSES Business Management Salesmanship Advertising Better Letters Learn at Home by wonderful print-and- method that teaches 11 anking and Banking Lew Accounta eel Bookk Private retary Business Spani (including C.P.A.) Accounting Foreign Trade Stenography Te 1 Typing aus ss Engli Civil Service Railway Mail Clerk Common School Subjects High School Subjects Illustrating (j Carteoning D French TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering Electric Lighting je Shop Railroad Positions Gas Engine Operating Pe Engineer Steam Engineering ng and Mapping Metallurgy Oj Mining Radio O Airplane Engincs Architect Blue Print Reading Yontractor and Builder Architectural Draftemap Concrete Bullder Structural Engineer Plumbing and Heating Chemistry Pharmacy Automobile Work Navigation Agriculture and Poultry the matics Persons residing im Canada should send this coupon to tional Davespenéense Schools Canadian, Limited, Montreal, anode. Please Mention Popular Mechanics Play by NOTE Piano, Organ, Violin, Cornet, . Mandolin, Harp, ’Cello, Trombone, Flute, Clarinet, Piccolo, Saxo- phone, Ukulele, Guitar. Har- mony and Com- position.Banjo, Tenor Banjo, Voice and Speech Cul- ture. Drums and Traps, Au- tomatic Finger Control, etc. usual time. Far supe private teachers. Simple as A. ! a child can master it. Your consist of real selections inst « some exercises. When you tf of these delightfully ea you've added a new “piece list. You read real notes t “numbers” or trick musi is so thorough that many « Ive students are band and « yr 1 Finger Control Our own invention—the musi of all ages. Trains and guid fingers so that they fall int place almost automatically. FREE BOOK Shows You How you may quickly become a fine player or singer ' the U.S. hool home study method. before free books are exhausted. Write now, ho« er Mention your instrument or whether you prefer vocal music. Plea your name and address plainly. Address U. S. SCHOOL OF MUSIC, 76 Brunswick Bldg., '. Y-¢

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i —— io hj =~ J - | nd i - OO a = 8 . aa . . . . . . . . . . . * 2 . . . . . eo . . . . . . . . . . . - . . = 7 o . a * . . . *. . . . . . . . . * . 7 - * | . af POPULAR MECHANICS ADVERTISING SECTION A telephone In your face to face contacts with people, your appearance, your bear- ing and many other things help you to make the right impression. But in your telephone contacts there is only one thing by which you can be judged—-your speech. An effective telephone personality is to-day a business and social asset. Everybody appreciates the person who speaks distinctly and pleasantly, neither too fast nor too slow, with a clear enunciation of each word, with lips facing the mouthpiece and speak- ing into it. In business, this is the telephone personality which induces favorable action on the part of the listener. To the salesman it may mean the difference between an order and personality no order; between an interview granted and an interview refused. Curiously enough, people who are careful to make themselves effectively heard and understood face to face, often disregard the need for effective- ness in their telephone speech. Per- haps they shout, perhaps they mumble, perhaps they hold the mouthpiece far from their lips. And frequently they never realize that their carelessness has defeated the purpose of their talk. The Bell System maintains for tele- phone users the best facilities that science, modern equipment, skilled operation and careful management can bring to telephone speech. But these facilities can be fully effective only when they are properly used. “BELL SYSTEM” AMERICAN TELEPHONE AND TELEGRAPH COMPANY AND ASSOCIATED COMPANIES One Policy, One System, Universal Service, and all directed toward Better Service

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POPULAR MECHANICS ADVERTISING SECTION —_ HANES GUARANTEE We guarantee Hanes Underwear absolutely — every thread, stitch and button. We guaran- tee to return your money or give you a new garment if any seam breaks. 5 Big HANES Features Hanes large, roomy armholes taped instead of turned under. Can’t curl or rip—but a friction-free surface that really wears. Hanes webbing belt guaranteed 2-thread elastic webbing instead of single thread, gives more elasticity and greater strength. Specially sewed to prevent tears and rips. Hanes closed crotch is cut and stitched in a special way that really keeps it closed. That means added hot-weather comfort. Hanes crotch lap buttons sewed on the seam. Won't come off. 4 thicknesses of material instead of customary 2. No patch used. Hanes wide, full-length knees cut so as to give greatest freedom without binding or creeping up the leg. Full Cut “HANES” is a hit | en in athletic unions! ALK about summer underwear— climb into “Hanes” at $1.00 and get the biggest athletic union suit value you ever had handed out! Every gar- ment is backed by the nationally known been sold for one lone dollar bill! Put “‘Hanes’” in comparison for generous full size; for reinforced strain- points; for extra-strength-elastic web- bing; for buttons sewed to stay on; for “Hanes” guarantee. From the quality of the long-wearing nainsook, right down to the last stitch, you've got comfort and workmanship and service that never before have buttonholes that last the life of the gar- ment! Compare “Hanes,” we tell you, and know what you buy for $1.00! “Hanes” is also made for little fellows from 2 to 16 years, in sizes 20 to 34. If your dealer can’t fit you with “Hanes’”” Underwear, write us immediately. P. H. HANES KNITTING CO., Winston-Salem, N. C. New York Office, 366 Broadway Net Winter Youll Wart tor Wear Hanes Winter Underwear

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POPULAR MECHANICS ADVERTISING SEC‘*ION See the New l is the newest development in typewriters— a complete office typewriter in portable rm—with every modern improvement, yet inexpensive that every home can own Note these three points of superiority! Speed: The Standard Portable Keyboard, with ht and left shift keys, cannot be surpassed r simplicity and swiftness of operation. Convenience: Automatic Ribbon Reverse, Two Color Ribbon, Extra Wide Carriage (10 inch), mplete visibility of writing—everything you This busy Corona store is located at 72 Fast Randolph Street, in the heart of the Loop district, Chicago orona today ! would expect in a big, heavy machine. Foreign language or technical keyboards at no extracost. Strength: Corona is built to stand rough usage—Coronas have been dropped from every kind of conveyance, including an airplane, yet there is no record of a Corona frame ever hav- ing been broken! Corona is the only portable whose sturdiness has been tested by 16 years of use. More Coronas are in use than all other makes of portables combined. Look for “Corona” in your phone book, or write us for our new, illustrated folder: Price $50 with case. In Canada $69. CORONA TYPEWRITER COMPANY, Inc. 108 Main St. Groton, N. Y.

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POPULAR MECHANICS ADVERTISING SECTION Heating Plants Plumbing Material Paint Roofing Hardware Radiation Wallboard Tanks, etc. Pipe-Fittings Wire-Fencing Structural Steel Agricultural Tools $2 350 = - One-Piece Sink PJ-2—White porcelain enameled roll rim kitchen sink with right or left drain board. Complete with faucets and nickel plated trap. 44 in. long 48 in. long 52 in. long... 2 Part oe Tub $1875 cement and gran- ite 2 part laundry tub co:nplete with im- - rove swinging mixing faucet and latest style strong angle steel base; nickel plated brass trap Bach’. SOFTEN Complete Bathroom Outfit PJ-1—Consists of bathtub 5 ft. long and 30 in. wide. White porcelain enameled on the inside and over 3 in. roll rim Deep apron lavatory size 18x24 inches. Low pattern white ch closet outfit with mahogany seat. Co with all nickel plated fittings above floor HMO. .cocccccccessccccseccccccsccss -OOlSO amo ENS mc Mail This Coupon for FREE BOOKS! Dept, PK.7 | Mark-an “X” in squares to indicate books i They are free and sent postpaid obligation to you. 1ilding material and supplies lan Book Harris iomes Beautif Presto-Up Garage Book -resto-Up Cottage Book jz ;_——¥ Harris Hom Harris Home No. 1006, above, with 5 rooms and bath, size 30 ft. x 29 ft.6 ins. is but one of more than a hundred beautiful, practical designs built many times with big economy in best residential districts. FREE { Every prospective * home builder should have this new plan book o Harris Homes Beautiful. More than a hundred designs—bungalows, cottages, residences. Explains the money saving advantages of our guaranteed Ready-Cut and Not Ready-Cut home building systems: the splendid quality of Harris Home building material; our liberal plan offers which save you from 50 to 100 dollars right at the start. Presto-Up, Bolt- Together Garages The wonder buildings of the age. Wonderful be- cause they are so simple Complete to the last de- with all windows, and hardware in Come to you in Bel sections, painted and ~- z— : ready to bolt together. Quickly and easily erected in a few hours. Our new, free Presto-Up, Bolt-To- gether Garage Book is now ready. Mail coupon for your copy. Numerous attractive designs; both single and double models, in every desired size, priced up- wards from $129.00, Bathroom Outfits Furniture and Rugs Lighting Fixtures Cabinet Work Harris Homes Steel Roofing Plasterboard Millwork Lumber Windows Garages Doors \ Heatind ima a3 Hot Water, Steam, Warm Air Complete steam, and hot water heating sys- tems— pipe and pipe- less furnaces planned foryou by expertsand guaranteed to heat your home comfort- ably, economically and efficiently. Our big stocks in- sure quick shipmentof everything needed to the last fitting. Cay able engineers are waiting to hel; you. Send a rough sketch of your bu ing showing size and locat rooms, number and windows and doors, height of ines and full information sent to you promptly. Builders’ Hardware Locksets, butts and & complete line of builders’ hardware ofevery description, All new modern de- signs featuring best construction, latest : style and newest finishes. The plete line is illustrated, described and priced wonderfully low | big building material book coupon for your copy today ¥ CO a> om- Lighting Fixtures A complete line of lighting fixtures care- fully chosen in sets for allrooms. Everything needed to wire you" home See them in our new book. oor V4, bs aad Hipprooooc Guaranteed Paint $185 Per Gallon PJ-8 — Best house paint in white, black and 26 non-fading colors. Per gallon ~ + 1.85 PJ-9—Barn and garage guar paint. Per gal Harris Brothers Co., Dept,PK-7 35th & Iron Sts., CHICAGO

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fits ugs res rk nes fing ard ork er Ws ce gcs os .2oot By o> sreooo oo A = 3) POPULAR MECHANICS ADVERTISING SECTION 119 ] timeprece— ed foralifetime at about the price you pay for nilar watch of er makes. ney down. wonder- Santa Fe Special and Bunn Special Watches prompts this matchless offer. While other watch dealers are raising their prices, asking you for larger month- payments, and making payment terms harder for you to meet, we are offering u our new model Santa Fe Special, no advance in price, no money down, easier rms and smaller monthly payments. WE realize the war is over and in der to double our business we MUST give you pre-war inducements, iter prices, easier terms, and smaller payments. Page Twelve of Our Watch Book is of \sk for our Watch Book free—then select the watch 1 would like to see, either the famous Santa Fe Special or the 6-position Bunn Special, and let us explain our easy ment plan and send the watch, express prepaid, for i to examine. No money down. SANTA FE WATCH CO. 66 Thomas Bidg. Topeka, Kans. REMEMBER— No money down easy payments buys a mas- 21 Jewel Santa Fe Special Sent on Approval Without one penny of advance payment let us place in your hands to see, to examine, to inspect, to admire, to ap- prove a real masterpiece in watch creation. Our determination to this year double our sales of the world famous Special Interest to You! a 21 Jewel guar- No TAKE ADVANTAGE OF OUR GREAT WATCH OFFER. er aaa SANTA FE WATCH CO. 66 Thomas Bidg., Topeka, Kans. Please send prepaid and without obligation your Watch Book free, explaining your “‘No Money Down’’ Offer on this Santa Fe Special Watch. BBB s oc 0ccc000cccccccecdésececes PPTTTTITITITITITIT TT TTT °

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POPULAR MECHANICS ADVERTISING SECTION Since 1882 when L.S. Starrett first introduced a line of tem- percd steel rules, machinists and mechanics have always looked to Starrett for the latest and best improvements in rules and me- chanical tools. You will find some thirty of the newest Star- rett Tools fully described in the new Revised Supplement and Catalog No. 22 AP. Write for it—we will mail you a copy promptly at our expense. Here’s the Rule youve been waitin 1g for The Stainless Steel Rule perfected by the L. S. Starrett Company represents a real achievement in fine tool making. STAINLESS—it is made from the highest grade of non-rusting and non-staining stcel. HARDENED AND TEMPERED +the rule is light and vastly superior in point of wear to any soft steel rule. GRADUATED—with the same fine accuracy that has distin- guished all Starrett Steel Rules for more than forty years. In short—the rule you’ve been waiting for. Ask for it at any good hardware store. STARRETT STAIN- LESS STEEL RULE No. 1000. ; : In two sizes—6 inch and 12 inch. x aye S Each graduated 8ths and 16ths on one side—32nds and 64ths on the other. No. 1000 THE L. S. STARRETT CO. The World’s Greatest Toolmakers Manufacturers of Hacksaws Unexcelled ATHOL, MASS. ST AINLESS Hardened and Tempered

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POPULAR MECHANICS ADVERTISING SECTION 121 DIRECT to you from our Factory

DOWN

and you keep this typewriter Big Saving In Price Yes, we will ship you this Genuine Underwood Rebuilt in our own factory just like new for ONLY $3 down—NoOT ONE CENT MORE Until you have tried the machine 10 full days at our expense Write Right Now This is the genuine Underwood Typewriter. We offer you the same and learn how it is possible for three models of the Underwood us to ship you this Underwood Typewriter being madeand sold by Typewriter upon our free trial the manufacturers today. Stand- plan and our direct-to-youmoney ard 4-row single shift keyboard. saving methods. mat the = ome wd —— writing — details now — just sign the coupon an the fu ine of typewriting is mail today. Get all the facts—then visible at all times. All the im- ; provements and attachments that No Obligation any high grade typewriter ought to have.

Our Factory EVERY MACHINE is fully guar- ed. New parts wherever by enamel, new nickel, new new platen, new key rings—a pe rfect typewriter. Impossible to tell —to buy. Youdon't have toor- der. Just sign the coupon, send ittous and we will Big Saving to You " i letter eon it 1 brand new men tee either in a er aral jurability or ity of finished wor absolutely free. : . “ a > ‘mn por y syne oad Our plan ot selling to you direct makes An up-to-date machine with two-color rib- ou will be amaz bon k spacer, stencil device, automatic at the liberality of possible enormous savings, which are all rit reverse, tabulator, etc, In addition S dt = a for your benefit. Send in the coupon ane be * t- 8 es oe <= . all around and we will send you prepaid our big You can wi to operate this Under- Coupon ° aoe ; catalog, including “‘A Trip Through Our nce oO - ” 7r ‘ wood in one day. Today “erage Factory.”’ This shows how the Shipman- ty pe- Ward Rebuilt Underwood is the best that poescets. can be produced at our Special Price. don’t have to do a thing to get 10 Days Big Book FREE You seer Free Trial

Our big handsomely illustrated

catalog l be fr 2. You have"ten full days in typewriter offer ex- YF REE TRIAL atalog will be sent free on re : eee which to try the typewriter cept to sign and quest. It tells you-all about the pefore deciding whether you _ send in the cou- o. COUPON ad ges of owning a STANDARD want to keep it. Give it every pon. There 4 SIZr. | NDERWOOD; how and why this —_test—see for yourself—make _is no obli- ¢ SHIPMAN-WARD MFG. CO. ma will last for years, saving many the Underwood prove its gation. ¢ A-212Shipman Blidg., Chicago dc ‘t only in the purchase price but worth toyou. Don’t take our i ee ee SS ee ID it eTation, os Py ne ——— 4 fully re id. your BIG NEW aisien Send in the coupon and let us.send you WO0OC, clove vot) ae ee at. of UNDERWOOD TYPEWRITERS this beautifully illustrated book FREE ne ae “ and complete details of your FREE Without any obligation whatever. offered TRIAL Offer. @ It is understood that I am under no obliga- S ry tion whatever and that this is to be sent with- hipman -Ward Mfg. ‘ oO. @ out one cent of cost to me. ? Name “Typewriter Emporium” A-212 ll es" o ~eer Montrose and Ravenswood Aves., Chicago ao a State

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122 POPULAR MECHANICS ADVERTISING SECTION = Send for this booklet on—NEW TOOLS by BROWN & SHARPE The New Tools described in this booklet are designed with typical Brown & Sharpe skill to meet certain present-day require- ments of every mechanic and shop owner. Such up-to-date tools as a single micrometer measuring from 2" to 6", a complete line of Micrometers covering a range from 0 to 24", and a 6" rule of Stainless Steel are a few of the NewTools this booklet describes. These New Tools are direct helps toward better workmanship — they will benefit every man or shop which uses them. Learn about these helpful tools write for this booklet today. With the booklet we shall be glad to send our No. 28 Small Tool Catalog if requested. BROWN & SHARPE MFG. CO. PROVIDENCE, R. I., U.S.A. BeautifuK HOUSES THIS WONDERFUL INVENTION] | and BUNGALOWS $900 v ordi »k into a gas stove. OXO-GAS is | | [Tg and many cxhers tn wy pew Homes, will save you hundreds of rdollars. One of the most complete F made from kerosene .and air. Cheaper, cleaner and more effi- cient, than. coal.. Responsible oak, Dep, cae. (iahed by any architect, New edition ust off pp FREDERICK Hl COWING 7 ’ Soon mobs. of ~-4~ ws Col paial “houses Laat - P GLORIA LIGHT co. ote. . costing from $200 up; gives sizes ane ARCHITECT . cos , 114.N. May St. Chicago, Ill. Sent toaid for $2.06 101 Tremont St., BOSTON. MASS. Strops ANY Safety]; HAWAIIAN IM. tg Ot DS Razor Blade Perfectly 100 SHAVES PER BLADE Thousands now in use. Uses any Just to advertise these fa- mous im. diamonds we will send you one of these 14K gis f. rings, pestage paid. strop. Special strop 50c extra. oo eer ee Sent postpaid for $1.00. cover cost, ete. Only 10,000 eo back guarantee. D. if you prefer. weaten Stropper Sales Company “ . KRAUTH & REED “ | Dept.1275 Kansas City, Mo. | | seeck?: Lo $2.98 Dept.C Masonic Temple Chicago Special vrice rings give mn away. Money refunded if you can tell it from _a ge ee — nd.

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POPULAR MECHANICS ADVERTISING SECTION 123

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VUE APPLIED ee $5 50 200 Ohms 7 3000 Ohms

are taking no chances when you Murdock Headphones with your lio Receiving Set. Experts have i them for over 17 years. | Murdock prices are so reasonable Stops Tnterference / very Radio enthusiast can afford them THE “WAVE TRAP” will eliminate interfering broadcasting stations and enable you to listen to your favorite station. It will work on any set, greatly increase its selectivity and clearness, and 1 pair from your dealer. Also ask him how you the new Murdock $5 Loud- iker. If he doesn’t have them send direct. eliminate code and spark stations WM. J. MUR DOCK COMPANY It is mounted on a Formica panel in a handsome General Offices and Factory mahogany finished cabinet 6x5x6. It is a high grade " - instrument throughout and a valuable addition to 349 Washington Ave., Chelsea, Mass. the operation ond appearance of any set. It comes Sales Offices: to you complete and there are no extras to buy. It New York Chicago San Francisco is installed in a minute by changing only one out- Los Angeles Seattle side connection. Use the ‘ a= TRAP” for real results MURDOCK 50 Electric @. ' 15 E. SOUTH WATER ST. RADIO sas CHICAGO STANDARD APPARATUS SINCE 1904 | 5, 7 a” a a a =

|. that's what you'll say. SIGNAL’S [tas making wireless apparatus over PD thirty years — that’s why. Send for Catalog. SIGNAL ELECTRIC MFG. CO. menomines, mich. (ain Comin’ in great!” cl ie Tune up a SIGNAL Radio Set, and Mtl ane < 3% YX

RADIO BLUEPRINTS Blue Print Design of Radio Receiv d range 1,000, 3,000 miles, 3, using Gry cell. 10c Biue Print Two Stage Amplifier itfit

Blue Print of Radio Freq

Sal 10 for our consis Catalog. Agents Wanted. Liberal Commissions We sell Guaranteed Apparatus BADGER RADIO CO., 497 E. Water St., Milwaukee, Wis. FREE Radio Catalog 9 Our big stock of standard makes of radio sets, parts and supplies enables us to make prompt shipment from stock. Play safe — buy standard equip- ment from a reliable house. No cut price material. Send $5. 00 for Murdock Complete Loud Speaker, 70c for “A” Battery Switch, 80c for pair Rubber Ear Muffts. JULIUS ANDRAE & SONS CO. In business since 1860 116 Michigan St. Milwaukee, Wis

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124 Some other ‘““YANKEE”’ Tools Spiral Screw-drivers Quick-Return Spiral Screw-drivers Ratchet Screw-drivers Ratchet Hand Drills Ratchet Bench Drills Ratchet Chain Drills Automatic Push Drills Ratchet Tap Wrenches Dealers everywhere sell ‘‘ YANKEE” Tools The POPULAR MECHANICS ADVERTISING SECTION The onl from ba “Yankee” Vise means assures perfect ali gn more speed—greater accuracy. bottom, sides and en You don’t have to remove’ machined true. work from vise until entire Quickly released fron job is completed. by turning set screw. [i When you carry work from in bench to drill press, to milling cam-throw lever at side machine, and so on, simply Hardened steel block, w lift vise, work and all, off base. shaped grooves, holds round A “Yankee” vise always or irregular work. ‘“YANKEE”’ Vises with swivel base No. No. 1994—Body, 1014 in. long; 4 in. wide. 1993—Body, 714 x 234 (wide) x3 in. No. 1992—Body, 474x2 (wide) x2 1/16 in. No. 1991—Body, 354x114 (wide) x 11% in. Nos. 994, 993, 992, 991. As above, without swivel base. Helpful Tool Book Mailed Free Illustrates and describes all the ingenious “Yankee” Tools for saving time and Jabor in drilling and tapping in metal, boring in wood, and driving or drawing screws. Jaws open to Send Postal Today. NORTH BROS. MFG. CO., Philadelphia, U. S. A. “YANKEE TOOLS Qnake Beller Mechanics removab continuou work any desired positi Jaws open to 4 ir Jaws open to 3% Jaws open to ilg y vig se f in I] YANKEE” Ye Toot e Book W Busine men! Send for Leena OLCOMB & HOXE e946 Van peg St. $600 to $5,000 PROFIT cat Butter-Kist Popcorn and Peanut Machine | in drug, —! candy, other stores, th« FROM WA er neg oP amazir mFG. CO indianapolis. RELESS CO Gives every facility of electric range plus every advantage of fireless cooker at less cost than a good oil stove. NEW INVENTION Fi Automatic Rapid Electric PP OKE Lal — California Bungalow Books **Home Kraft’’ and ‘‘Drau htsman”’ each contain Bungalows and Two Stories. ‘‘Plam Kraft’’ Two Stories. ‘“‘Kozy Homes’’ Bungalows. $1.00 each—all four for $3.00. De Luxe Flats $1.00. DE LUXE BUILDING CO. 516 Union League Bldg. Los Angeles, Calif. REVOLUTIONIZES COOKING Saves 50% to 75% fuel cost Bakes, roasts, boils, stews, fries, toasts. Needs no watching. Shuts electricity off auto- oo? matically. Attaches to any electric socket 7” {é No special wiring. Write for FREE Home = ®& = Science Cook Book, 30-day FREE trial offer | & ) and direct factory prices a WM. CAMPBELL CO., Dept. 64, Detroit, Mich., George\ow".

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OOL Boox 1OmM WA ‘ORE SP. zing stor p! I hea et . CO. jianapolis, ric FP rorge town, POPULAR MECHANICS ADVERTISING SECTION Different from all others-the The Benjamin is really a ae air- pump used to compress the air in the air chamber to any degree of power desired. From one to six strokes of the pump give all the force necessary. Each additional stroke gives increased power. The njamin works on the same principle as all air-drills and air-hammerse—with this difference: You control the shooting force as you de- stre. Look at this block of hardwood. Jt shows how Benjamin power is regulated as you wish. You can’t have accidents with a Benjamin. It's LL, *. always, because you control the power he Benjamin never loses shooting orce, and has no ‘Grings to get out ot order or shake youraim. Write us for an interest. ing folder about this wonderful air-gun, If your dealer does Ask your not handle same, send NY dealer for direct to factory - demon- PRICE POSTPAID BENJAMIN AIR-RIFLE & MFG, CO.,615 N. Broadway, St. Louis, Mo, our skin can be quick! M cleared of lackheads, — tions on the Pores, 0.00 Cold can clear your skin of the WRITE TODAY for my FREE Booklet—"‘A Clear-Tone Skin” —telling how I cured myself after being afflicted for fifteen years. E.S.GIVENS, 129 Chemical Bidg., Kansas City, Mo. Ping face or bod Oily or Shiny Skin. $1 $1, Cash says | above blemishes. Great NEW Invention for Seekers of Health—Power—Beauty Revitalize yousnetts Brin, ng back en- ergy. Be wholly alive. leo Health Generator aids you toleave the lethargy and ee of bad health behind forever. Yours for 10 days free trial. (fico [Write bits as rie or Free Generators Book Write { fon Soot free 4 that tells all about this great at gives = el — let Ray, Vibration in the we ents. Find out yer you cap = have the Elco for 10 8 froe trial. Write today. Lindstrom & rt aed 442 WN, Wells St ) FREE Trial Chicago “21 Jewel Burlington . buddy a! totheSecond 21 Ruby and Sapphire Jewels to Temperature 25 Year Gold Strata est tolsochronism Your Choice of ice of Dials, to ~ — = Thin Only] OO ‘Down Only One Dollar Down will buy this masterpiece of watch manufacture. The balance you are allowed to pay in small, C- monthly payments. The Burlington—a 21- Jewel Watch — is sold to you ata price much lower than that of other high-grade watches. sides, you have the selection of the finest thin model designs and latest styles in watch cases. Don’t delay! Write for the FREE Watch Book and our SPECIAL OFFER today. Get the Burlington Watch Book by sending this coupon. Find out about this great special offer which is being made for only a limited time. You will know a great deal more about watch buying when you read this book. You will be able to ‘‘steer clear” of the over-priced watches which are no better. Remember, the Burlington is sent to you for only One Doilar down, balance in small monthly pay- ments. Send the coupon for watch book and our special offer TODAY! Do not delay one minute! Burlington Watch Company De t. A- A-135 19th St. & Marshall Blvd., Chica dian Address: 62 Albert St., Winnipeg, Mani Please onl me (without obligations and prepaid) your a book on watches with full explanation of your $1.00 down offer on the Burlington Watch.

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POPULAR MECHANICS ADVERTISING SECTION ‘Starland CMelody“SAXOPHONE Learn to play 1 SAA The easiest instrument to learn, it is also the most popular! Pick out tunes in an hour, as quickly as with one finger on the piano. And there’s no faster way to make extra money than play- ing Saxophone at dance or church or theatre. Makes you a social favorite, always ey every where! os e Standard ** elo axo- 10 MONTHS TO PAY ! phone is the supreme grade ‘made in Elkhart.’ Choice of famous artists and teachers. The 1923 model with *‘bevelled sockets’’ makes all other Saxophones ‘‘out of date.’’ Sent to you for 6 days’ trial, to prove to ey its ease of Stowsns. simplified fingering and golden tone can’t be eguallod at or price. Complete 12 piece outfit direct to-you from factovy at nly $1 down and .00 a month. Small first payment. Sensa- tiona cut in price uring this sae, no interest, no tax, not one cent extra:—Saxophone, $10 case, self-instruction system, book of music, reed, strap, pear! keys, etc., everything you need. Quality that enables you to buy once for a life-time. 1 ells you how you can secure the CATALOG FREE! ereatest et Cansehoncecn coey seme than cash prices! Write tor this free book and Sammptete | infermetion of our sensational ‘offer Standard Music Co., Dept.1022, P. 0. Box 503, Chicago Start A Profitable Business for Yourself —and make MONEY right away KINGERY POP CORN POP- PERS AND PEANUT ROAST- ERS often prove a gold mine for the ambitious person. The invest- ment is ee no at- tention is required to machine while in operation—littie expense for stock or power—and profits are BIG: 3 4c on every 5c sale or 8c onevery 10c purchase. KINGERY MACHINES are complete in every way. They turn out the buttered popcorn and hot roasted peanuts with little effort on your part. VERY LITTLE SPACE IS RE- QUIRED—for KINGERY POP CORN POPPERS AND PEA- NUT ROASTERS can fit in prace tically any space. Everybody-—young or old—rich or poor—every person is a possible crstomer. James Kipwiss, P. O. Box 56, Waynesburg, Pa., wr “Since I got your machine, in 15 days I have made $227 INVESTIGATE TODAY WRITE FOR FREE ILLUSTRATED CATALOG ing a model for every purpose at a price for every pu ' : Dept. PM KINGERY MFG. CO. CINCINNATI, OHIO TUNE IN ONE AFTERNOON FREE Complete instructions for Peking , music with Harmonica (Mout Organ) sent p “e 1 aay American Boy, First learn the scale—*‘do, re, me, fa’’ etc. Then try “Home Sweet Home.’ Diagrams and full explanations show you how you can do this easily witha HOHNER HARMONICA After you've done this you can play any tune you can whistle -- with chords and ful! accompani- ment. Harmonica is most popular music on the radio. Biggest hit of the year in N York Orchestras. Bethe first boy in neighborhood to play a harmonic a well, Astonish your folks and friends. Be eure to aie at the music goods store apne store, stationery or drug store n your town for a Hohner Harmonica-- 50c and up. Write us this minute and say “‘Senc ‘me Hohner Harmonica In- structions’’ and give your name and address. Write now, to:-- mM. HOHNER Dept. 20, 116€. 16thSt., New York City e - ——— et y MARINE BAND % pone Moet rer1cr | = ENTAUG = our Store for free instructions a” Hohner at to be an expert wrestier. scientific wrestling Learn if-defense, “and jar jiteu. Devel , apnea phys _ perfect health. "Ton en god mail. The famous world’s champions—the marv: Frank Gotch ana Farmer Burns boys w ll the science and tr this wonder! for * -. your ag Latest fad—ke: STASON ro ent YOU ARE A ASON-— you * Mysterious Charm. AT vealing the SQU TARE AND ¢ OM Gold plated. Sent postpaid, $1! asonic Catalogue listing publications, jewelry, para j phernalia. REDDING & COMPANY WY 200-5thAve.,Dept.25,N.Y.C. AGENTS 39°: $60 - $200 per week. Free samp SIGN L ERS for store and « Anyone can put them on. Big de where. Liberal offer to general a METALLIC LETTER CO., 4338 N. Clark Chicago Those who wear them say: ERICKSON LEGS are Wonderful — because they do not chafe, overheat or draw end of stump. If you have had a recent amputation send for new booklet on TEST LEGS for beginners. E. H. ERICKSON CO. 38-A Washington Av. N. MINNEAPOLIS . MINN. Established 1892

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ic wrest! nysi que, " a tearn by 9 Burns s easily and rite now | tricks. ul POPULAR MECHANICS ADVERTISING SECTION Set in Platinum ant steel blue genuine diamond i in asetting of solid platinum so ose inspection wiil distinguish it aire valued at $750.00. Shank of K. white gold, in latest design. Price only $57.50—pay balance $5.55 a h for ten months. 10 Days’ Free Trial Simply send $2—if not satisfactory at the end of ten days, your deposit will be re- fonded to you. Can be supplied in gentleman’s _ mounting without extra charge, Aittemore'’s Shoe Polishe 5 (No Red Tape } No a | /ROYAL DIAMOND Free “Royalton” Pearls We are givingan 18-inch strand of genuine‘* Royalton”’ Pearis fitted with a solid gold clasp ABSOLUTE- Y FREE just to get you started as a customer. Free Book of Gems Most complet agewey catalog ever issued of Diamonds, Watches and Jewelry—latest designs at lowest prices, 10 Months to Pay on Everything from our Two Million Dollar Stock Address Dept. 778 WATCH CO a5 Maiden Lane -New York Every investor wishing to learn about bonds of absolute safety yet paying an attractive yield (ranging as high as 7%) should write at once for this book, which will be sent for theasking. It has been prepared by George M. Forman & Company. YOUR COPY NOW READY In every banking circle the name Company has always been associated with sound investments and an attractive yield. Just 1 post ard or a letter will bring your copy of our interesting bx “How to Select Safe Bonds.’’ GEORGE ms. FORMAN a COMPANY, Dept. 446 05 W. Monroe Street, Chicago, Wi. “35 Years Without Loss to a Customer"’ of George M. Forman & ENTS: 90can Hour Introduce “Sodereze.” A new wonder. pure solder in paste form. Works like -~# Stops all leaks. For mending water buckets, cooking utensils, milk pails, water tanks, tin roofs, everything including granite ware, agate ware, tin, iron, copper, zinc, etc. QUICK SALES, NICE PROFIT . Everybody buys. Housewives, mechan- Ym ics, electricians, jewelers, plumbers, ae tourists, automobilists, etc. No leak too bad to repair. Just apply a little Se “Sodereze,” light a match and that’s - Put up in handy metal tubes. Carry quantity right with Write for money-making proposition. inn AN PRODUCTS CO., 7577 American Bldg., Cincinnati, Ohio — HOME LOVERS’ BARGAIN BOOK FREE Showing Over 10,000 Furniture Bargains é a vaned free for a month. Take a year to.pay if g little by little almost as you plea SPIEGEL MAY. STERN CO., 1108 W. Sth | St., Chicago A expected! For bruised or broken aie nothing is so convenient as antiseptic, germicide and liniment in one container. // Makes each more efficient. A few ~~ suffice. $1.25 ~ A wy Fran grarsdy Li or = = postpaid, W.F. YOUNG, Inc. 147TempleStreet Springfield, ass. ‘AbsorbineJ THE ANTISEPTIC LINIMENT Jim—lI’ve stopped smoking Gained six pounds in a week ou know how I used t ot ciga bacco treatment—fixed weeks, “Wasn't hard on me at all—noticed im- provement the first day—lI feel like a new man It didn’t interfere with my work didn't leave any druggish after-effects—the money I saved in the last two weeks has paid for the treatment alone “Why don't you takeit? It has cured men like you and me for over forty years—it is a doctor's individual prescription that sure fixes you up. Just send the coupon for full information NOW No obligation. All cor- respondence is strictly confidential.” THE KEELEY INSTITUTE Dwigh Illinois The Keeley Institute, Dwight, Ill. Please send me, without any obligation on my part, your free booklet which will tell me how to rid myself of the to- bacco habit. Pe cccccccncccscscesseses TOWN STREET

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POPULAR MECHANICS ADVERTISING SECTION ON CREDIT DIAMONDS: WATCHES . xX h ’ Pea Blue white, per- fect cut Diamond. GENUINE DIAMOND RINGS FOR GIFTS We import Diamonds direct from European markets and sell direct to you by mail. Our immense buying power is 4 — agreat saving pom -Customers testify toLoftis values. Wagy Oar long years of service to the public is our Guarantee of satisfaction and the eguard of your interests. Send for Catalog There are over 2,000 illustrations. Select as many ar- ticles as you wish and haveall charged inoneaccount. f Sent prepaid for your Free Examination. Catalog ex- plains ae LIBERTY BONDS ACCEPTED. /| GreenGcld, engraved, No. 16—Wrist Watch, 18-K Solid WhiteGold, guaranteed 17 Jewels, $39; i4-K, 15 Jewels, $32. 25 years.12 \ CREDIT TERMS on all articles: One-fifth Size,giltdial. down, balance divided into equal payments Assorted within eight months, Send for Catalog. patterns, THE ae Le ORIGINAL — te -y RS BROS.&CO. {553 108,N, Sate ‘Sret Chicage, - Make the Parts You Needona MONARCH Jr. Lathe Metal or wood parts needed in your experiments, on your inven- tion, or on your automo- bile can be made with a MONARCH Jr. Lathe. This 9” Engine Lathe isful- ly equipped—semi-quick change gear and auto- matic safety devices. Does any small work with 1/1000” accuracy. $2U5 22 Also built up to 5-foot bed lengths and up to 11-inch swing —at slightly higher price. SEND for Free Catalog of MONARCH Lathes which are built up to 30” swing. THE MONARCH MACHINE TOOLCO. 400 Oak Street SIDNEY, OHIO “LITEWATE JUNIOR’ DRUM OUTFIT 4 for Home Orchestra School Orchestra Dance or Theatre Orchestra only *4see Ay 00 O Monthly Outfit contains one Lyon & Healy Professional Bass Drum; one Lyon & Healy Professional Snare Drum; Ludwig Pedal: re Drum Stand; Pedal Cymbal and Holder; Chines. Crash Cymbal and Holder; Tone Block; Pair of fine Stic ks, BIGGEST value in a complete outfit ever offered! It takes only practice to make you a Drummer — STAR T NOW! You can practice with Player Piano or Phonograph and progress rapidly; soon give HOME DANCES = lina couple of months be ready to step into th« hool or regular orchestra — and earn money evenings if you care to. Send for details or remit first payment 1 we will ship outfit on trial! For sale by your Music Merchant LYON & HEALY, 73-72 Jackson Bivd., Chicago LATHES 9 to 18-inch Swin List price $165and up accor tosize. When ready to buy for Lathe Catalog and price W.F. & John Barnes ( 100 Ruby Street, ROCKFORD II It isthe well known quality o CRESCENT machines th justifies you in selecting or them each time you wood working r CRESCENT line is be and will diways give y in every particular A catalog of band saws jointers, shapers, pla planers and matchers nder, cut « chisel! mortiser, variet er, Universa) wood workers THE CRESCENT MACHINE CO., $3 Columbia Street, Leetonia, Ohi RAISE BELGIAN HARES ee 1 PPROFITS, FITS, WePat $ 1. 50 S070 $8 EAC cH Also Cavies, Mink, Skunk, Fox. Muskra‘, § Easily raised anywhere. 33 32. e Catalog and Con llustrated boo! five SING,”’ America’s leading small stock Retina ntern Co..1 SQUAB BOOK FREE Squabs are selling at the highest 1 “4 sk today f saw tablesy ers, borer med Breed them and make money. at once for free book, prices, etc. Plymouth Rock Squab Co.. 634 Howard St., Melrose Hig hlands, W South Bend Lathes THE TOOL /OF INDUSTRY / How to Runa Lathe New S0-pasebook, Revised Edition No. 24, for 10 cents postpaid, silver or stamps. | SCREW CUTTING ENGINE LATHES Standard Change Gear 9"x 3’ Lathe 11"x 4 Lathe 13"x 5’ Lathe 15"x 6’ Lathe 16"x 8 Lathe 18" x 10’ Lathe 21"x 12’ Lathe 24"x 14 Lathe Quick Change Gear 9"x 3’ Lathe $ 241.00 11"x 4’ Lathe 288.00 13"x 5’ Lathe 15"x 6’ Lathe 16"x 8 Lathe........ 18" x 10’ Lathe......... 21"x 12’ Lathe 24"x 14’ Lathe Catalog No.79 sent free to any address SOUTH BEND LATHE WORKS 625 E. Madison Street SOUTH BEND, IND.

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ss Drum; ig Pedal; Chinese 2 Sticks, ! Ittakes Tr NOW! raph and ind ina school or up accordin yto buy sen Z and priceg arnes Ce CKForD.IL own quality o Machines th selecting one gi u have need f e Highlands, Mas ‘HES sear § 241.00 288.00 354.00 431.00 512.00 721.00 16.00 53.00 POPULAR MECHANICS ADVERTISING SECTION Fix it with BERNARD PLIERS There are Dozens of Places on your car, motorcycle or bicycle where Ber- nards can nose in and grip and cut better than any other tool. Compound leverage, parallel jaws, and outsidecutting blades make Bernards the all around tool for men who appreciate the real thing. At good Hardware Stores. Booklet “‘P” Free on Request. BERNARD PLIERS Wa. SCHOLLHORN CO. NEW HAVEN.CONN OUTSIDE CUTTER PARALLEL JAWS ALVAN CLARK TELESCOPES Famous throughout the world as the highest grade Astronomical and Terrestrial Instru- ments. Now bringing to you at a reasonable price, these wonderful instruments—a sour-e of pleasure and education—for the home—the school—the college. Send for circular and prices. ALVAN CLARK & SONS CO. Makers of the great ‘‘YERKES’’ and “‘LICK’’ Telescopes 55 Henry Street Cambridge, Mass. Protect your tools from Write any name, engrave any design t with electricity like writing paper with pen or pencil. Complete 0, , prepaid any where. [nterest- 4 a ar free theft Arkog' D 1007 Yeon "Buliding — Measure Hard-to-Get-at Places instantly, accurately. Just slide rule a, out. No folding;strong; brass- SS” trimmed, Any length ‘ ——-S ‘2to8ft. 20c per lineal mas . foot. If not at deal- sive Guanes, er’s, sent post- TOOL - CHESTS for Machinists & Toolmakers Every tool arranged in order. No up-to-date mechanic should be with- » out one. A Gerstner Case costs no more than some tools, and willlast alifetime. Catalog free AMSlersleer en 717 Columbia Street DAYTON, OHIO 129 ATKINS Atkins “‘Non-Breakable”’ Hack Saw Blades ‘‘Best Hack Saw Blade I Ever Used”’ That’s what you'll say if you'll put an Atkins ‘‘Non-Breakable” Blade in your hack saw frame. You can cut faster and easier, and avoid losses due to blade breakage. These blades are made of specially selected steel and tempered by an ex- clusive gas and oil process which gives them a harder, keener cutting edge and a tougher, more flexible back. Tell us what metal you cut, enclose ten cents, and we'll send you a sample blade. When you need any saw for cutting wood or metal —there’s an Atkins product that will save time, money and labor. Write for free booklets on the saws you require. Get This Book Sent You FREE A 32-page book that’s full of practical suggestions on metal cutting, and general shop in- formation. Every man who buys or uses saws will find it helpful. Just write your name and address on the margin of this } and mail it to us— NOW. E. C. ATKINS & CO., Inc. Dept. P Indianapolis, Ind. Makers of “Silver Steel’’ Saws and Tools page Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION

“*Red Devil’’ Pliers made in 100 styles—one for every need. Known and used the world over. Style 1024—6% inch shown above, $1.00. REO.U S PAT OFF. Auger Bit The Harder the Wood The Faster It Cuts HE “Red Devil” cuts twice as fast as ordinary auger bits. You don’t have to push the “Red Devil” Bit to make it go through apiece of oak as quickly as an ordinary bit will cut into soft pine. The special construc- tion of the worm makes the bit take hold quickly and strongly. It pulls itself into the wood in tractor fashion. The “Red Devil” Auger Bit saves time because it cuts fast — won’t clog — bores straight and true with or against the grain of any wood, “Red Devil’ Auger Bit No. 2400 — made in 20 sizes, from 3/16 to 24/16ths. On sale at all good hardware dealers’. If notin stock, send dealer’s name and 75c for a sample bit, size 10/16ths, The “‘Red Devil’’ mechan- ic’s tool booklet will help you select the tools best suited for your particular pur- pose—send for it—it’s free. SMITH & HEMENWAY CO., Inc. Manufacturers of “‘Red Devil’’ Tools 260 Broadway, New York, N. Y. “‘Red Devil’’ Glass Cutters—the glaziers’ stand- ard tools of the world. “It’s all in the wheel.” Made in 40 styles. No. 024 shown below, 20c.

No [| au oe IC | Pumping No | Moe Priming The One That Blows Itself The handiest tool ever devised for sol- dering connections on Radio sets, re- pairing wiring in your house or on your car. Produces a 1400° needlepoint fia: stantly. Fine for close, careful work. Used | tricians and mechanics everywhere 60” coil self- fluxing (acid or rosin core) solder Lenk Super (mouth biow) terch Lenk Jumbe (mouth blow) torch Marvel Soldering Kit—one Lenk Automatic B! and two coils se!f-fluxing solder—one acid and r core, in neat leatherette case $2.00 If your dealer doesn't sell them, order dire: LENK MFG. CO. 30 Portland Sire

AT ALL 5 and 10 Cent STORES MSCORMICK & CO.. Baltimore

Moore Push-Pins Glass Heads -Steel Points Moore Push-less Hangers To hang up things Ask your dealer to show Sold Everywhere ] f pechet Moore Push-Pin Co. Wayne Junction Philadelphia

‘ . . e 99 *‘Lighting Fixtures READY TO HANG (Direct from Manufacturers Completely wired, including ¢!as New designs. Send for catalogue >} Send for DEALERS’ proposit ERIE FIXTURE SUPPLY CO. STA. A. ERIE, PA.

Peps oden Al The New-Day Dentifrice —

SELF-FILLING INK PENCIL - INDEPENDENT ” Guaranteed | *~ improved F all require = — Eliminates tates : ments. Self- een > A S Easiness essi filling, non-leakable, safety cap. Attached clip. 3 Smooth writing gold Stylo point. Your Name in Gold 25 Cents Extra AGENTS WANTED Please Mention Popular Mechanics 4. C. ULLRICH & CO., 161 Washington St., New York

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POPULAR MECHANICS ADVERTISING SECTION 1338) © Sa elele: DIE-STOCKS Send for folder describing the pipe threading tools with the 5 Big Features—Oster Bull-Dog Die-Stocks. THE OSTER MANUFACTURING COMPANY 2100 E. 61st Place Cleveland, O. GEARS ‘smatt The most accurate made and prices reasonable, We carry a complete line of gears in stock for immediate ship- ment. Oan also quote on special gears of all kinds. Send us your inquiries, WRITE FOR CATALOGUE. CHICAGO STOCK GEAR WORKS 105-109 S. Jefferson St., CHICAGO REMINGTON PORTABLE TYPEWRITER Dealers and Branches Everywhere Brings This Genuine DIAMOND Easy for you to own this beauti- ful ring or give it as a present Simply send $1. Examine ring A. 4 onarrival. If you don't agree it is mond: 18 kt whi an amazing bargain, your deposit ood. hana nite will be returned. If you keep it, pay graved andl aeveed postman only $1 and send $1 a mountian ) are week until $32.50is paid. Guaran- | \ beauty. Only tee Diamond Bond with each ring. \ $ FREE S2t2!ee- Diamonds, Watches, 3 .50 Jewelry, $10 to $1,000. Alli / on long credit. Wonderful values. Est, 1890 Address Dept. 626 BAER Bros.Co. MAIDEN LANE - NEW YORK with Education There’s nothing like having a “*hobby”’ when it leads to worth- while results. The use of Tools gives you that mental rest so necessary after hours of hard study. The Training, of doing any job you tackle well, is admir- able discipline. The use of Good Tools is bound to make a good craftsman.,, STANLEY Tool Assortments The same tools that carpenters have used for years are now sold in Cabinets, Chests and Boxes. No. 904 Cabinet is shown below. Ask any hardware merchant to show you this cabinet, or write for Folder “9-F” illustrating many Stanley Tool Assortments. The Stanley Rule & Level Plant ) THE STANLEY WORKS NEW BRITAIN, CONN. New York Chicago San Francisco Los Angeles Seattle STANLEY TOOLS Please Mention Popular Mechanics B|

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POPULAR MECHANICS ADVERTISING SECTION Retail price —including tax, $15. Stevens ** Vi ote Saoding.” An accure ite peater. he PM wher is loaded, and you bnew when it is empty. Summertime coming fishing - swimming ~ tramping — shooting A Stevens .22 rifle will do a lot to make your vacation a success. For a Stevens rifle does a man’s work. That’s the only kind of rifle you can have any fun with—one that shoots straight and can stand a little rough handling. And a Stevens stands at the top when it comes to accuracy and endurance. When a Stevens barrel is bored or drilled, the final cutting removes less than one-half of a thousandth of an inch. Slow work—but it gives lasting accuracy. And the same painstaking care is given to every detail—to getting a handsome finish; to striking just the right balance. Once you get the feel of a Stevens, you'll hate to lay it down. The finish put on Stevens rifles and shotguns is exceptionally fine. From butt- plate to muzzle nothing has been left un- done to make every Stevens firearm thoroughly good looking and durable. Finally—the prices. Little short of amazing are the Stevens prices. You can’t do better. Ask at your dealer’s or write for the in- teresting catalog describing the Stevens complete line of rifles and shotguns. J. STEVENS ARMS COMPANY Dept. 566 Chicopee Falls, Mass. Owned and operated by the Savage Arms Corporation. Stevens Summer Home in Maine A gentleman’s estate of 175 acres on the Maine coast, with frontage on a lake 9 miles long; master’s house; large bunga- low; caretaker’s house; large garage; barns: private electric light and inexhaustibk water works, and every modern improve- ment, Forty acres very large trees. Golf and yacht clubs only a few minutes away; good markets in the town, The scenery of mountains, lake and ocean is pronounced one of the best five in New England. House and bungalow both completely furnished; steam heat. Place will be sold at a great bargain as owner can no longer use it. Address OWNER 206 East Ontario Street CHICAGO, ILL. $3 Cash Buys Typewriter Balance Only $5 Monthly a Save 35 to 60% on all standard makes Underwood, Roy: al, Remington, etc. Every mac hine thoroughly rebuilt and ¢ -) GUARANTEED. Try five days at our Peat expense before you buy. WRITE at once for Free Descriptive Circular and Special Low Prices. WYNN TYPEWRITER EXCHANGE {! Slims Kansas City, Mo. ay NOW TIME TO START +6 BIG DEMAND. HIGH PRICES BEING PAID An uncrowded occupation. Exce Stoo tional opportunities for live 1 and women. Raised at home Ox small space needed. Small expend:tur aaa you ina practical money-making ent« rp Big profits. Booklet telling all fre Nat’ISpawnCo., _Dept.i2, Waban, Mass SEN D NO MON EY 2 GENUINE DIAMONDS 3. i Each $25 14 kt. White Gold Top. Gold Emblem Inlaid in Genuine Hope Ruby Can be had in all initials — (Old English); also in all aay lodge emblems, including American Lezion. Send size D # G mM —] es Letter of finger and ring will be This Reg. Tri N sent for inspection guarantees you renuine © Buffalo yy Mfz. Co., “The Mail- Order House” t. P-S, Brisbane Bidg., Buffalo, N . _

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POPULAR MECHANICS ADVERTISING SECTION STOP Payine the Penalty four x: in WESTERN OF 211GH PRICED LAN D CANADA — cove: Your Big Opportunity Yaeger land or capital, you —. Whe high oiond Act now. You can still secure good farm lands in the rich open round you will forever prairies or fertile park lands of the Lloydminster and Battleford down—for those fine districts of Central Alberta and Saskatchewan, or in Manitoba for rom oy hes cune an average of about $18 an acre—the lowest prices at which good ns that have held you farm lands on the North American continent will ever be offered. Be a Home-maker e changed. The Ca- This land is ideal for mixed farming as well as grain growing - me Pacific Railway bow Special Home- uu a farm home on a “siseccse. te: TWENTY YEARS TO PAY | seekers’ rates ist act now! ' , bal paenees railway fares for u have to pay down is ten per cent of the purchase price, bal- N 10omeseekers make inspection nineteen annual instaiiaante with sienna at wh, er cent. ~ 0 taxes OM easy. You can also secure free, if you purchase under settlement conditions, which re- — oe _bamphiets full of 5 P acts and government figures uire occupation and reasonable improvements, there is no Improvements about land values, acreage her payment of principal until the end of the fourth year, yields, climate, Western Can- and besides this the interest for the first two years will be ada’s farm achievements of only two per cent per annum, balance of interest at six per cent and the principal = {!¢ Past and its possibilities of divided into sixteen equal annual payments. Taxes are moderate and there are no taxes raphy pT hn on your livestock, buildings, improvements, implements, or personal effects. Good markets, a ing farms to settlers on easy modern schools, roads, churches, amusements, make farm life here desirable and attractive. payment terms > M. E. Thornton, Supt. of Colonization YouCan (Buy Until YouHave Investigated CANADIAN PACIFIC RAILWAY a" — 966 First Street E. Calgary, Alberta You must be satisfied and have every question an- I am imerested in learning more about swered before taking up your farm home. There is LJ) Prairie Provinces of Canada time now for thorough, careful investigation, but do Irrigation farming in Sunny Alberta not delay in deciding to investigate. Send the () Business and Industrial Opportunities in Western Canada coupon today for full information 0) Lloydminster and Battleford Districts M. E. Thornton, Supt. of Colonization § xy Name CANADIAN PACIFIC RAILWAY & Acaress 966 First St., E., Calgary, Alberta, Canada Town ANEW T0 CET YOUR WAY | cAre You the Man? ABSOLUTELY | Here is your opportunity to establish a business or increase your profits. and Make time ine We need men in every locality to maintain a selling and installing agency for the Sager Metal Weather- strip. Not necessary to be a mechanic, but must be a good salesman. Sager Metal Weatherstrips reduce the coal bill 's; therefore the demand is uni your eat gusina Sor grup pee cheiane versal. It is easy to hire mechanics That's 8 not our way of doing business. for installation. 3 is ws © cow and better plan. Fitty-atx stytish, real cloth samples—PREE We furnish prospects as well as ad- colored fedien ; inside wholesale prices - : everything F Just drop us a line teday vertising literature. It is an unusual complete outfit FREE. proces opportunity—Are you the man? ACT NOW—Write Today circulars, labels, tags, book, menus, p*per. Sager Metal Weatherstrip Company Press, $12. Larger $35. Job Press $150 up. Save money. ° rm Print for others. BIG PROFITS. All easy, rules 160 W. Austin Ave., Chicago sent. Write factory TODAY for press catalog. TYPE, cards,paper. THEPRESS CO.D-37, MERIDEN,CONN.

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POPULAR MECHANICS ADVERTISING SECTION The Lightest Speediest and Most Durable Outboard Motor in the Almost as Easy to Carry as a Pair of Oars Makes a speedy power boat or plea- sure launch of any boat or canoe. boy or girl can handle it. The whole family enjoy it. 2H.P. Twin Cylinder. . - Weighs Only 35 Lbs. 15 to 50 pounds less than usual, yet guaranteed more durable. Has real carburetor, real magneto no batteries to carry —spark and throttle control like auto, instant reverse, self tilting and ten other valuable features. Write for Free Catalog folder today JOHNSON MOTOR COMPANY 904 Sample Street South Bend, Ind. EASTERN OFFICE—120 Broadway, New York City THE LIGHTEST. LIVELIEST BOAT MOTOR ON THE WATER.

CAILLE PRONOUNCED “‘CAIL’’ LIBERTY MOTOR. "Tr only rowboat motor that will drive your boat through weeds almost impass- able—the only motor that will drive your boat well up on shore when landing—the. only mo- tor that rises over rocks and sunken logs while maintaining full power ahead—theonly motor that can be attached to boat on shore wh« startingout. Providesplenty of power, iseas ly carried and hz ismotorcyclecontrol. Nomot regardless of price, can give you greater ser ice. And a Caille Liberty Motor costs you but $75.00 complete. Why pay more? Send for catalog and name of nearest dealer. THE CAILLE PERFECTION MOTOR CO, 6218 2nd Boulevard Detroit, Michigan

a thy Tyres Positively prevent punctures y blow-outs, Give double tire mileage, any tire—old or new. Use over and over again. Old worn-out cas- ings will give three to five thousand miles more service. Car ownerssave $50 a year. Over one hundred thousand satisfied customers, Low priced. Special representatives wanted, snemnacans ACCESSORIES CO., B-1276, Cincinnati, Ohio Drive 100 Tacks and Save $25.00 o fo 2~< rig = $5.20, $6.95 and 9 3 Dodge or Maxwell, $13.95. $ 20 up other prose naa. cars $16.50 with plate i 8 de curtains that open with doors Delivered ou 3 s $3 15 up Quality the o fit. Printed instructions given how to apply. Send for sam- ye include de liv ery at your door. Eastern orders shipped from Ohio. co. huto EQUIPMENT 055 So. Broadway, LOS ANGELES, CALIF.

7OUR boy will be proud when he meets “Dad” for the first time with the new MATEAFIARTZ. Mother and the children will enjoy their summer this year if you provide them with this sturdy,reliable motor boat that they can run in absolute safety—over rocks, snags or in shallow water. Your week-end at the cottage will be a delight—you can reach the spot where they're biting without tiresome oar work. Write today for the story of this wonder- ful boat “1500 Miles in Canadian Wilds.” DISAPPEARING PROPELLER BOAT CORPORATION 331 Robinson St. North Tonawanda, N. Y, The pe maT: g leads Boat-

ord Cars — positively prevents all timer trouble-Automatically gives proper épark for all speeds— Does away with spark lover. Back-kick practically im- possible—No more broken arms or . ruined starting systems—saves gaso- line, gives more power—easier start- ing—steadier pulling. Sold on mon- ey back guarantee— Every Ford ow- ner will buy at $3.60. Agents wanted. Big profits. AUTO SUN PRODUCTS CO., Dept. 47, Cincinnati, 0. _

RELIABLE STANDARD MAKES that you can DEPEND on, Enjoy the glorious experie! going wherever you like—w! you like. The price is wit! means 5% to 50% less thar ers. "These machines are used, t oughly overhauled or rebuil ates cua ene — BROS.,

258 Columbus A Boston, Mass MOTORCYCLE BARGAINS _. Save 25% to 65% on Slightly used and he built Motorcycles, Side Cars, Johnson Motor Wheels, Evans Power = les, Bicycles. Send for Free Bargain Bulletin and essage, listing hundreds of Bargains in ass ed rebuilt and new machines, supplies .accessories,etc. feegcan MOTOR CYCLE Co. as Dent. 622 7 W. Chi 0 Avenue, y $45.00 For This Job Compiete ave Me freight rates and ne- nal origina l cost by buying Ford Speedster Bodies

Not Paper Patterns - All Parts Complete olte,screws,etc. Fiat radiator shel furnished made up. Designed low ack of wind resistance. Price set up $90, further particulars on re The Central Auto Supply Co. Eng. Dep. 120, Losisville, Ky

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POPULAR MECHANICS Blue Sky and Silvery Water Wo days, when the sky is blue and the stream is calm, and you and she are idly drifting over the placid water. The faintest dip of the blade keeps you moving. For an “Old Town” is the easiest canoe to paddle. The light- est canoe made—the steadiest, strongest and lowest priced, too! $54 up from dealer or factory. Every one is pat- terned after a real Indian model, The free 1923 catalog shows all models in full colors. Write for one to-day. OLD TOWN CANOE CO. 1366 Middle St., Old Town, Maine, U. S. A. MAKE OVER $800.00 MONTHLY Owning and operating an Anderson V ulcanizer which vulcanizes tires 3”’ to and including 5”. You can vuleanize the smaller tires in all three molds. We guarantee no other vulcanizer will properly cure as many tires daily as the Anderson. It will do $160 worth of work daily and will keep 8 men busy. You can run it ten hours daily, six daysa week, forless than yon can any Other make, half aday. An Anderson Schoolis near you. a STEAM VULCANIZER CoO. > aa Ind. bie . PANS a? 2 Eels, Mink,Muskrats and other va ch is g fur-bearing animals, in large our new, Fold- , Galvanized Steel wo Trap. It catches them lsi like a fly- trap catches flies. Made in zes. Strong and durable. Write for Descriptive Price List, and our Free Booklet on best bait known for attracting all kinds of fish. _ _J.F.GREGORY, Dept. 24, Fe bane, Moe You don’t need to know the ind if you pack one of the styles of Taylor Compass- ~reliable guides that take 1 anywhere. At your dealer’s~~ask n for prices. ADVERTISING SECTION nasiness per H. P. — with double the bearing surfaces LTHOUGH the ELTO is a light weight motor~—the lightest outboard motor per horse-power—it is built around big bear- ings—bearings twice as big as those of all other motors in the light weight class. And the life of any motor is in the bearings! A Full Extra H. P. The ELTO has an Extra Horse-power— 3 full H. P. It is the only 3 H.P. light weight motor. It is by far the fastest motor. And while it is light, it is only as “light as right” with not an ounce of useless weight. Ole Evinrude, while bringing the weight of his perfected light twin down to to easy portability, would not do so at the slightest sacrifice to safety, needed power or durability. Instant Starting Because there could be no relieffrom hard, stubborn and uncertain starting, without change of ignition. Ole Evinrude madethe change The ELTOstarts on the first quarterturn under all conditions. No ropes or starting devices needed, Safe Rudder Steering —no possibility of dangerous pivot turning No shaking \ steering handle. Tiller line | steering from any part ofthe boat. Hands free except at turns. Enlightning Information Write us for ELTO Catalog —a book packed with inter- esting facts and illustrations which will show you how to judge outboard motor values Dealers and Demon- strating Agents a fine proposition awaits you in openter- ritory. Write today! ELTO Outboard Motor Co. Dept. AA Manufacture rs Home Bidg. Milwaukee, Wis Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION FREE A Vitalic Bike Cap to boys who will write for it. “Why Don’t You Use VITALICS?” “Mine are Six Years Old” Boys tell us how their Vitalics resist punc- tures, and wear and wear for years: Stand the hard use that only boys know how to give tires. Their letters are the best evi- dence we have of Vitalic quality. Such records of service and long lasting qualities are the kind of proofs that count most with buyers of tires. And when such makers as Excelsior, Iver Johnson and others specify only Vitalics as standard equipment for their finest bicycles, is it any wonder that boys for years have preferred them. For real endurance no tires equal Vitalics. “Tougher than Elephant Hide” is a slogan that thousands of boys have proven for themselves. Whether it is on the new bicycle, or for the old— insist on Vitalics. Continental Rubber Works 1944 Liberty Street Erie, Pa. VITALIC Bicycle Tires ELECTRIC BICYCLE AMPS a Home from Work After Dark With a Delta Electric Bicycle Lamp on - bike—you are protected from approa ’ automobiles, either front or rear, you also see the road one hundred feet al Ride in safety while others walk. Mod complies with all laws. .Fits any bicyi stantly—under axle nut front left sick Ask your dealer or sent prepaid $2.25 complete (less battery). DELTA ELECTRIC COMPANY 100 Delta Block Marion, Indiana Standard makers of Electric Lant Radio Headsets, Bicycle Lamps, a kinds of Dry Batteries, New York San Francisco Winnipeg MeeteN MARVEL-O Will keep the enameled finish of your automobile bright as new, Contains no oily ingredient, bees wax, acids or harsh abrasive. Is unequaled. Send name of your accessory dealer and $1 for full size 16-0z. can. MARVEL-O MFG. CO., San Diego, Calif. You Can Save $3522 Recover your old top frame you Custom tailor r $445 and up ¢o fit all makes Parcels Post Paid models of cars \ person that can dr acarcan putiton. Roof and quarters sewed toget with rear curtain, fasteners, welts and tacks compl Give name, year and model number of your car a we will send you catalog with samples. LIBERTY TOP & TIRE CO., Dept. E-7, Cincinnati, 0 “ TOUGHER THAN ELEPHANT The White Tube Patch That never fails This white tube patch adheres instantly because ma of pure para rubber, that stretches with the tube ar can't creep or tear out even if tube is over-infla! You can patch a pinhole or a seventeen inch blow and the joint will become stronger than the tube its Complete outfits 50c and $1.00 LAS-STIK PATCH MFG. CO., Hamilton, O!

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POPULAR MECHANICS ADVERTISING SECTION

You may now have any musical instrument for a week's trial in your home at our risk. No obligation to buy. Return the instrument at our expense at the end of a week is you decide not to keep it. The trial will not cost you a penny. Convenient Monthly Payments A few cents a day will pay. Special combination offers on complete musical outfits—velvet lined case, all accessories, self-instructor, etc. —everything you need at practically the cost of the instrument alone. Send Coupon for New Catalog Every known instrument illustrated, many in full colors. Also prices, easy terms and free trial blank. Catalog absolutely free. Write today. The Rudolph Wurlitzer Co., Dept. A177 117 East 4th St., Cincinnati _ $29 S. Wabash Ave., Chicago 120 W. 42nd St., New York — 250 Stockton St., San Francisco Send me your new catalog {llustrated in color with full details of Warlitzer free trial and easy payment offer.

in a fast growing business with ; . Vanderpool Latest Improved en selling SAITLS Gee Vulcanizer. Made in America. We eae, Oe manictaer vente agents we Ask for Catalog \ hy and night shires direct to wearer, Ad: Steady Work £25 F-@oy NX ‘ao ‘ | vertised brand--exclusive patterns--easy < Vanderpool Co. Springfield, 0. 3! getsea, Bntirely new proposition sia F.H. = BA AL oiss, Agent for Sottiot ~¥ Shirt Co. 803 B y 8. ¥. HANDS BADLY SOILED ? You can wash them clean quickly with | “450 vag LT "este ~ Saves $8 for Photoplay Ideas| Your FORD for Photoplay Ideas Thie emall ; Se Wtleien® aa , . , lis small investment in a “ Union ' send your manuscripts to studios until first pro- $Fuse Block . “te : ed by copyright. Plots accepted in any form; revised, @ ruse DIX protects your Ford. In case —. copyrighted, marketed. We are right on the gy of a grounded wire—often causing fire ind in daily touch with the studios. Not a school — a fuse blows instantly, preventing your wiring, /urse i UNIVERSAL SCENARIO CORPORATION and your Ford from burning up. Also puts 938 Western Mutual Life Bidg., Los Angeles, California an end to flickering lamps—binding posts Publishers SCENARIO BULLETIN-DIGEST Send Ser ten eamete ceee | | bolted rigidly into fibre prevent that. Per : mits use of regular single-filament lamps for $4.00 Adding Machine bright and dim lights. The Gilson Adder will do your figuring easily, t SENT POST- quickly and with absolute accuracy. Capacity , PAID FOR $1.50 109,999,999 or $1,099,999.99. It adds, sub- } 4 . er tracts, multiplies and divides and automatic- if not at megllieese-air ally carries from one column to the next. é Money back if not satisfi Made with aluminum case and steel operating : Write for Bookle te size 344"x6"x14". Written Two-Year Guarantee. : "Set emeantins . ee Pl pe oe , SAME 1503 West 15th Street, CHICAGO, ILL ‘ 8) . - Eastern Branch: New York Gilson Slide Rule Co., Niles, Mich.

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POPULAR MECHANICS ADVERTISING SECTION 8 Hour Sittey"cniging- Pays Big! New HB Constant Potential System charges all sizes of batteries perfectly in 6 to 8 hours, while old systems ¢ Sate days. You can clear $150 to $300 every month. No; needed. HB Outfit comes complete, ready to connect to ser: linesand operate. t niversaldemand for quick, dependablebat. tery charging means big business and steady profits for you. $30 Monthly Pays for Your HB Outfit Small cash payment brings your HB 8 Hour Chareing Ow Easy terms of only $30 monthly let your profits pay balance with nice surplus besides. Long free trial on money-back guarantee lets you try outfit at our risk. Don't deia nd let some competitor get ahead of you with 8 Hour Battery Charei, Take the lead yourself. Order your HB Outfit NOW fran trial. Write today for full information and our easy. payment plan. HOBART BROS. CO. Box M6 Troy, Ohio Your Satisfaction Guaranteed or Money Back e2or3 erence Wide variety of styles, all sizes of Portable Fireproof, brings Big Garage Catalog free Best Roofing at Factory Price Don’t buy Roofing of any kind until you get our big Free Roof- ing Book, describing full line of Edwards Famous ‘‘Tightcote” Galvanized Roofings, Sidings and Ceilings, and our lowest fac- tory prices. Then see for yourself how much we save you by selling direct and saving you all in-between dealers’ profits. EDWARDS meta! shingtes Absolutely rust proof. BY our patented “*Tightcote’’ process, edges as well as sides of metal sheets are heavily coated with zine— not a space the size of a pin point exposed to weather. Fire and lightning proof. Outlasts three ordinary roofs. Forever wind and weather proof. Need no repairs—end all roofing expense. Patent INTERLOCKING DEVICE makes water tight seams—all nail heads covered no chance for rust or leaks. EDWARDS Galvanizing Test Edwards “‘Tightcote’’ Galvanized Roof- ing can be bent, twisted or struck by lightning, and the lvanizing wi not crack or flake, Bend it or ham- mer it—you can’t loosen or scale the vanizing. Noother galvanized roof- ng can withstand this test, Low Priced Garages FREE Samples & Roofing Book Metal Garages. Lowest prices ever made. Pos ; for free eamp! d proof that we Write Today can eave youa lot of ener on roofing sidin: ceil ‘ou may peed. for kiockne Book No“is0. THE EDWARDS MFG. CO., 600-650 Pike St., Cincinnati, O. ™9 “BOW LEGS and KNOCK. 1\ 4 KNEES” UNSIGHTLY | SEND FOR BOOKLET SHOWING PHOTOS OF MEN WITH AND WITHOUT THE PERFECT LEG FORMS PERFECT SALES CO. 140 N. Mayfield Ave., Depi. 8, Chicago, Ill. ~ Indoor Sanitary Toilet Shipped on approval. Write for our remarkable = rock-bottom factory offeron COMFORT Indoor Toilet. No sewers,cesspools needed. No plumb- - ing. Set up anywhere. Absolutely odorless, Sanitary. Chemicals consume matter and kill germs. Health authorities endorse. High grade swhite enamel, Send for literature. AGENTS Get our terms. Exclusive territory. Wonder- ful opportunity for you to coin money. ROBINSON HOUSEHOLD MFG. CO. Cherry and Huron Sts., Toledo, Ohio ° SEND NO MOREY ‘1 if You Can Tell it from a GENUINE DIAMOND Send it back To prove our blue-white MEXICAN DIAMOND cannot be told from @ GENUINE DIAMOND and has same DAZZLING RAINBOW FIRE, we will send aselected 1 carat gem in ladies Solitaire Ring (Cat. price $5.26) for Half Price to introduce, $2.63. or in Gents Heavy Tooth Belcher King (Cat. Price $6.50) for $3.25. Our finest 12k Gold Filled mountings. GUARANTEED 20 YEARS. SEND) N MONEY. Just mail postcard or this ad. State Size. We wil! mail at once. When ring arrives deposit $’.63 for Ladies ring or $3.25 for Gents with postman. If not pleased return in 2 days for money back leas handling charges. Write for Free catalog. Agents Wanted MEXICAN DIAMOND IMPORTING CO.. Dep? ET.Las Cruces, W. Mex (Exclusive controllers Merican Diamonds) 65% Have This Gland Trouble “At Middle Age Do you suffer with sciatica, painsin back, legsor feet, fre- quent nichtlyrisings, bladd or kindred trouble; have lost the old pep and agg siveness; do you have blu or mental depression? Scientists and medical authorities agree that ¢ of all men past a certain middleage (t..ousa1 younger) have a disorder of the prostate g¢! often responsible for these annoying condit Simple Home Treatment Buta néw treatment has been discovered bya m« ber of the American Association for the Advat mentof Science. Alread yover10,000men haveu this method with astonishing success, It has sa many of them from the surgeon’s knife. Yet t method is so simple that it can be used by any —no drugs, lessons, electric rays. Nothing tot unless you get immediate relief. If you have p: tatic trouble, or any of the symptoms mention: Free Boo send immediately for a Fr Book, “Why Many Men A Old at 40,” which tells all about this meth and the truth about glands. No obligation. J yive name and address. Write immediate! he Electro-Thermal Company, 2122 Main Street Steubenville, Ohio.

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sig! 8 of auto take 2or3 ex perience POPULAk MECHANICS ADVERTISING SECTION 139 iabechee ATENTS mers stores COPYRIGHTS — SPECIAL OFFER — Free Opinion as to Patentable Nature balance ay and ie waa disclosing an invention, the inventor should write for our blank ayhareing. form ‘*‘Record of Invention.” This should be signed and witnessed wae aay and if returned to us together with model or sketch and description y. Ohio of the invention, we will give our opinion as to its patentable nature. Our Three Books Mailed FREE to Inventors OUR ILLUSTRATED GUIDE BOOK HOW TO OBTAIN A PATENT Contains full instructions regarding Patents, Trade-Marks, Foreign Pat- ents. Our Methods, Terms, and 100 Mechanical Movements illustrated and described; Articles on Patent Practice and Procedure, and Law Points for inventors. OUR TRADE-MARK BOOK Shows the value and necessity of trade-mark protection and gives infor- mation regarding Trade-Marks and unfair competition in trade. OUR FOREIGN PATENT BOOK We have direct agencies in all foreign countries and secure foreign patents in the shortest possible time and at the lowest cost. LIST OF PATENT BUYERS SENT FREE IDEAS WANTED: Send Lis, Of, SATENT, RovER® oo and others WANTE TO BUY ee gees } mand for NEEDED INVENTIONS. We endeavor to assist OUR clients i in the commercia’ development of their invent ons. SPECIALIZATION—OUR STAFF The field of invention is so vast thatitis impossible for any one man to be- come an expert in all classes ofinvention. For this reason we employ a number of patent lawyers and mechanical experts selected for their special knowledge and ability in certain lines of invention. THE VALUE OF YOUR PATENT depends on the skill and care with which your case is prepared and =e in the United States Patent office. That every case receives our st efforts, and that our work is done skillfully and thoroughly, is evi- denced by the many unsolicited letters of commendation that we receive y Bala > constantly from our clients. We will furnish upon request lists of clients / from any state in the Union for whom we have secured patents. ica, Our New York, Philadelphia, Pittsburgh, Chicago fre- and San Francisco Offices der We have established for the benefit of our clients Branch Offices in New you York City, Philadelphia, Pa., Pittsburgh, Pa., Chicago, Ill., and San Fran- . cisco, Cal. These branch offices located in theselarge commercial cities ’ together with our Main Office located near the U. S. Patent Office, in Washington, enabie uste more promptly ues handle the business of our clients, particularly as the branch offices are in constant touch with the Main Office. nds Highest References Prompt Attention = Reasonable Terms es | VICTOR J. EVANS & CO,,Patent Attorneys | used NEW YORK OFFICES CHICAGO OFFICES PHILADELPHIA OFFICES - 1007 Woolworth Building 1114 Tacoma Building 714-715 Liberty Bldg. PITTSBURGH OFFICES SAN FRANCISCO OFFICES 514 Empire Building Hobart Building MAIN OFFICES: 765 9™ STREET. N.W.,WASHINGTON, D.C. Gentlemen: Please send me FREE OF CHARGE your books as described above. | | | ‘ SOE ee Ae -_f reet “8 ous anaes Gam Ge eee dee len ae an a ae ae a aan ae a ab a aa

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POPULAR MECHANICS ADVERTISING SECTION PATENTS Seventy - six Years of Practice HE firm of Munn & Company filed its first application for a patent in 1846, and for seventy-six years has endeavored to keep pace with the inventive genius of the United States. An experience of many years is at your disposal. If you have an in- vention which you wish to patent, send yoursketches or model together with a description of your device, explaining its operation,and you will receive prompt, courteous attention. Write for our Handbook on PATENTS A full and complete booklet on Pat- ents, Designs, Trade-Marks, Foreign Patents, Copyrights, Labels and Patent Office Practice with an explanation about our methods, terms, etc. All communications strictly confidential. v Keep in touch with the inventions of the world by reading SCIENTIFIC AMERICAN The MONTHLY MAGAZINE with a special appeal to every man of in- ventive genius. Recent rulings of U.5.4 PATE -NTS | OR . GENO! ron SiN) DON’T LOSE YOUR RIGHTS TO PATENT PROTECTION Before disclosing your invention to anyone send for blank form “EVIDENCE OF CON. CEPTION” to be signed and witnessed. A sample form together with printed instr 1 will show you just how to work up your evi. dence and establish the same before filing ap. plication for patent. As registered patent at. torneys we represent hundreds of inventors all over the United States and Canada in the ad. vancement of inventions. Our schedule of fees will be found reasonable. The form “Evidence of Conception,” sample, instructions ting to obtaining of patents and schedule of sent upon request. Ask for them—a post ‘card 1 vill ‘do, PATENTS ANO/7-NIRADE MARKS LANCASTER “ge & ALLWINE . 480 Ouray Bldg. “2S Washington, D.C. Originators of forms “Evidence of Conception.”’ ictions Have You An Invention? | If so the WORLD PROGRESS will show you ! PROTECT AND PROFIT FROM YOUR IDEAS This magazine is devoted entirely to the inter: ventors. Sample copy free. One year’s subscript $1.00. Also send for free book, “WHAT TO INVENT” containing SUGGESTIONS TO INVENTORS from | inventors and scientists of Inventions Needed, We in facturers and promoters to address us regarding any inv or patents they may want. WORLD PROGRESS PUB. CO.., Inc. Room 203 Victor Bidg. WASHINGTON, D. C. PATENTS Secured Prompt service. Avoid dangerous delays. Send “Record of Invention” form and Free Book telling How » | Obtain a Patent. Send sketch or model for examination. Pre liminary advice without charge. Highest references rite T Jacobi & Jacobi, 410 Ouray Bidg., Washington the Patent Office, descriptions of the latest patented inventions, legisla- tion and court decisions affecting patents, are noted in this authorita- DAY. tive publication. MUNN & COMPANY Patent Attorneys 672 Woolworth Building, New York City Scientific American Building, Room 2 625 F Street, Washington, D. C. Suite 801, Tower Building, Chicago, Ill. 601 Hobart Building, San Francisco, Cal. Please Mention Popular Mechanics P T eat Grmas in Amer pat- in Americe we A EN cive aes at lowest Pa MT charge, & service noted for results, evidenced by many wel! knowa i ey value. Book, Patent-Sense. / [coy & Lacey, 646 F St., Wash., D.C, Estab. 1869. ———y C. L. PARKER 4. fx. arr wining PATENT L WYER McGiLLt B WASHINGTC Patents, Trade Marks, Copyrights, Patent Litigation Handbook for Inventors, “* Protecting, Exploi'ing and Selling Inventions,”’ sent free upon req *!

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ion? ! IDEAS n $1.00. LEER LSS Re oe ee > POPULAR MECHANICS ADVERTISING SECTION Protect Your Ideas ' Any new article, machine, design or improvement thereof, or any new combination of parts or improve- ments in any known article which increases its efficiency or usefulness, may be patented if it involves invention. If You Have Any | Write today for Blank Form ae ae ne Oe es - New Ideas which you feel are useful, prac- | tical and novel, take prompt action toward protecting your rights. If you have invented any new machine, or new combina- tion of parts or improvements, or new process or design, send drawing, model or description of it for information as to proce- dure to secure protection. ‘“*Evidence of Conception”’ to be returned to me with draw- ing, description or model of your idea. Promptly upon receipt by me of your idea I will write you fully as to procedure and costs. No Charge for the Above Information All communications are held in strict confidence. My personal, careful and thorough attention is given to each case. I offer you efficient, reliable and prompt service —based upon practical experience. Highest references. Write today for free book, “How to Obtain a Patent.”” This book will give you valuable information, and it may save you much time and effort. for it NOW. My practice is devoted exclusively to United States and foreign patents and trade-marks. Very probably Ican help you. Write today. CLARENCE A. O’BRIEN Registered Patent Attorney 1700 Southern Building Washington, D.C. CLARENCE A. O’BRIEN, 1700 Southern Bldg., Patent Attorney, Washington, D. C Please send me your free book, “How to Obtain a Patent,” and blank form “Evidence of Conception’’ without any obliga- tion on my part. Name (WRITE CLEARLY)

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POPULAR MECHANICS ADVERTISING SECTION INVENTORS PROFIT FROM YOUR own IDEAS. We show you how. Thousands of men, and women, too, have ideas that would bring in fortunes if properly developed and protected. , HAVE YOU AN IDEA FOR THE IMPROVEMENT OF ANY THING? HAVE YOU AN IDEA OF SOMETHING ENTIRELY NEW? or new ideas, sometimes bring the biggest fortunes. Can you think of a simple, practical idea that will fill one of the many requests we have on | for new inventions? Thousands of things are needed, NOW. WE SHOW YOU HOW TO PROTECT YOUR IDEA; HOW TO GET THE MOST OUT OF IT. SEND FOR THIS FREE BOOK Tells you all you want to know about inventions, patents andtrade marks. Valuable information. Patents advertised, for our clients, free, in “INVENTION and MANUFACTURING,” a magazine for inventors, for the man with an idea. (One year’s subscription 50c.) A postal will do; but DO IT NOW; IT MAY MEAN THE STEPPING STONE TO FUTURE SUCCESS. AMERICAN INDUSTRIES, Inc. 517 KRESGE BUILDING, WASHINGTON, D. C. The smallest improvements, PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSON E. COLEMAN, Patent Lawyer, 624 F St., Washington, D.C. P ATENT If You Have an Invention and Desire to Learn How to Secure a Patent Send for our Guide Book, HOW TO GET A PATENT, sent Free on request. Tells our terms, methods, etc. Send model or sketch and description of your invention and -_— seeee SSCS SST CESSES SESE SEES Ee Eee EE EEEE EEE SEE EEE TT Teee we will give our opinion as to its patentable nature. RANDOLPH & CO. 600 F St., N.W., Washington, D.C. Tr ty, XR AR AR AL A AR AR Js | | KM AA et ra AA _AR_AL_AR_AA

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I SX A OE A A A A an , 4 _ » _ ) 4 - ) — ‘J ef AA Lt | | P| P| P| P| P| PP ,* P| Ps I I a A 3 POPULAR MECHANICS ADVERTISING SECTION Inquiries from Manufacturers and Others Who Are Looking for Good Ideas PROTECTED BY PATENTS are constantly being received. Manufacturers are always inter- ested in any new device for which there is a market, which fills a long felt need, which makes production possible at a lower cost, or which will do the work BETTER. There is undoubt- edly a great demand today for really worth while inventions. e Your First Step If you have an idea, send immediately for my blank form “TO RECORD YOUR INVENTION.” You should serve your own best interests by filling out and signing this form before you disclose your invention TO ANY ONE. This document will help you determine and establish evidence of invention before filing an application in the U. 8. Patent Office. A copy, with full instructions, will be gladly sent free on request. goox “SUCCESSFUL PATENTS” free Every man who has an invention, or ever hopes to have one, should send for a copy of my book “SUCCESSFUL PATENTS.” It tells what everyone should know about patents, trade- marks, copyrights, ete. It describes my methods, fees and terms, gives information relative to assignment or sale of rights, and instructions in detail. Mail coupon today for a free copy of this book or a post card request will do. To the Man with an Idea I offer a comprehensive, experienced, efficient service for his prompt, legal protection, and will endeavor to aid him in the commercial development of his poe ion—my service is distinguished by over 12 years’ successful practice, and by thousands of satisfied clients and by reasonable fees. Send sketch, or model, and description, for advice as to cost, opinion as to its patentable nature, etc. Preliminary advice gladly furnished without charge. RICHARD B. OWEN, Patent Lawyer Main Office, 9-303 Owen Bldg., Washington, D. C. Branch Office, 2276-E Woolworth Bldg., New York City. Please send me, without charge, or other obligation, a copy of your book, “SUCCESSFUL PAT- ENTS,” yourform “TO RECORD YOURINVENTION,” andinformation concerning patents, etc. seeesAddress } rs / ©, Yy YY YY YY YV WY YY YY WY Yi V7 VW oe, VY NY YY YY} 7, YY YY YY YY YY ) Si at Tat Vat” *

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144 POPULAR MECHANICS ADVERTISING SECTION How to Invent Edison Says ‘‘Invention is a Science and should be taught as a Profession”’ e Idea May Win You a fortune TT’ 1OUSANDS of inventions are a ‘today. , Just one little idea can bring you fortune an ame. et This rful The world is waiting for new invéntions in’ engineer- g- ing, chemistry, household articles, radio, and other fields It From a Genuine Diamond Send t Back —and will pay big money for even the simplest idea. Little gevuing things like the tin bottle cap, the sesling play of iv eerat crimped hairpin, the rubber on the ES Fate anion fitanaspera mcd af easels end ofja pencil brought their invent- D ors hundreds of thousands of dollars. Weara a Goresite jJamond 7. DAYS FRE Carotite anda di Couldn’t you make some equally sem tree <i 7 a eeeeee ° simple invention? Haven't you ideas If you keep the ring tingle pe loom that could be turned into money? Inventing isn’t a matter of blind luck —it isn’t a question of guesswork. Invention is based on certain prin- ciples, just as any other profession. It follows a de finite course of proced- ure step by step from the origination of the first idea to its final develop- ment on a commercial scale.

slip of paper. atting Whes fener rine steer f Sage wets , send it Spe eee hil gou decide ES earn at Home | e222 — ——— in Spare lime moet ATEN TS. Write for advice and instructions how to pr . costs, etc. Hand Book with illustrations of 100 Me Hitherto, every inventor had to work out these principles of ical Movements sent free On request invention for himself For every_successful inventor knows and : uses these prine iples. He knows WHAT TO INVENT and HOW ALBERT E. DIETERICH TO INVENT. But now you can learn in a few months what it caf took great inventors years of discouragement and terrific struggle Pa‘ent Lawyer and Solicitor to acquire. Fifteen famous inventors have now revealed, for the Suecessor to Fred G . Dieterich & Co. 621 Ouray Bldg., V . Washington, D C. | first time, the secrets of invention They explain how to originate ideas, how to de velop and perfect your ideas, how to patent your inventions, and how to sell them to your best advantage In short, they make it amazingly easy for you to become an inventor, simply by learning the whole wonderful science of invention, step by step, from beginning to end It requires just fascinating moments of your spare time at home. Send us sketch or model for patentabilit vn | . . ° and exact cost of patent. Our book “‘How to Obtain a} F 1 r ~ t Co u r N e of its Ki nd Patent,”’ Sent Free on request, It tells how | for Patents, Trade Marks, Foreign Patents, ‘ This is the first course in practical Invention that has ever been etc.; gives information on Patent Proce t Gevised Now you can take Edison's advice and actually learn what every inventor should know. Thousa l a TO INVE =e | = make Invention a profession! In Vertors, who are our Clients, are our refer | mple, easy-to-understand language, you are told how success ‘ ex Ww oy nce, | inventors work; you learn how to use the secrets of invention — Chandlee & Chandlee, 25 Years’ Exper oy | convert a simple little idea into money. 435 7th St. Washington ay New Bookon [ PATENTS Inventive Science || TRAPE-MARKS = COPYRIGHTS A wonderful new book has just come from the press that tells al! Send for our free book of patent informati about the Science of Invention; that shows how great inventors pes. how little ideas have made fortunes: how you too can easily 802 F Street, Washington, D C earn the secrets of successful invention. This fascinating Book will a e ar : be sent free to all those who are genuinely interested. Send for this 16 S. Broad St., Philadelphia, Pa Book today, as only a limited number are availiable for free distribu- tion Write your name and address on the coupon below, or send a post card NOW! There is no cost or obligation Dept. 36 W loner Bult a VESeS Stas ‘wy PATENTS and TRADEMAR KS. Rochester, eee eee ee ee ee ee We offer a strictly professional service to inventor Bureau of Inventive Science, facturers in the protection of their patent and trad Dept. 36 Wisner Building Validity and infringement investigations conducted ( Rochester, N. Y. dence solicited. Moderate fees. Preliminary advi Please send me your free book, “The Science of Invention.” charge. No literature. Name MILO B. STEVENS & COMPAN » Barrister Bidg., | Washington, D. C. Address Suite 337A Monadnock Block, Chicago Cit . ESTABLISHED 1864 gevireer

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POPULAR MECHANICS ADVERTISING SECTION

Buy direct from the mill —save middle- men’s profit. maternal comes in one com- plete shipment—cut to fit—-ready to erect, all on ground when you start building. No waste. No guesswork. d for beautiful book de luxe of Sterling Built Homes and see for yourself the attractive Colonials, beau- tiful bungalows, mm —homes to fit every purse. Don't delay. Building costs are going up. Send 20c Today for 1923 Book International Mill & Timber Co. 1906 S. Wenona Ave., Bay City, Mich.

TYPEWRITER SENSATION! Free Trial—Use as You Pay Fred-i-Kut Life-Size | After trial send us only $4.00 a month until the low total Patterns | price of $48.80 is paid, and the machine is yours. This is : instructions | absolutely the most generous typewriter offer we ever made. pm i | yourFORD inte and Tail Do not sent @ mactise wee you Tn A et eee. ) 7 own one. nk of it—Buying a x Machine for 80. will bol» this SPORTCAR Botivered Cash price $45.00, just a little less than half its original price. Famous, Reds. ut life-size pat- , oth REE Nota REMINGTON linois ture inetructions show bh you The can r our ST, SAL "SPORT Car as thousands ** Ace’* — have done, with easily obtained materials, of . Save $50 to $100 by building your ** Pal Ford: asA.F Castner of ‘exas writes. Noneed to la: “* Have y y up the car. The “Pat with conical me fe tterns, finished m. ination fine rear. Only $6.40 de- opal: JES | Perfect machines, Correspondence size, Keyboard of Standard

livered. boat. go | Universal arrangement, 42 Keys, writing 84 characters. The entire wheres goat | line of writing completely visible at all times, has the tabulator, the can’t or two color ribbon, with automatic reverse, the back spacer, v ble spacer, self-starter, in fact, every late style feature and modern thru operating convenience. Comes to you with everything complete; mud on high | tools, cover, operating book and instructions—nothing extra to buy. [CH <o where others You cannot imagine the perfection of this beautiful recon- | p40 the cette | Here iss picture | Structed typewriter until you have seen it. We have sold Order new while we can make good deliv- 1 d. 1 | thousands of these perfect late style machines at this bar- oxy ond be ready for the happy summer gain price and every one of these thousands of satisfied cus- ad) YS bee . tomers had this beautiful, strictly up-to-date machine on 37 Kuempel Bidg., ” like a rabbit.’ —-Cal Fos. | five days’ free trial before deciding to buy it. Guttenberg, tows tune, Columbia, Ky. We will send it to you F. O. B. Chicago for five days’ free trial. It will sell itself, but if you are not satisfied that this is the greatest sling Irona, **.Fiffy’” You can build it, Over | typewriter you ever saw, you can return it at our expense. You Tope and '* Gosuen’’ Windshields. 11,000in use. OrderToday | Won't want to return it after you try it, for we are sure you cannot equal this wonderful value anywhere. WE'LL SWAP YoU Send No Money! $ so - your name and address for our cat- P 4 ¢ O d N — alogue on ‘the greatest real home ut in Your Order /Vow ArTER SVIE-MACHINES — in _ the ; When the typewriter arrives deposit with the express agent $8.80 and take the machine pperience, | world, with dazzling models as low for five dase’ trial If you are convinced that it is the best typewriter you ever caw ton, D.C. | as $5.00 postpaid. And say,folks! We've also keep it and send us $4.00 a month until our bargain price of $48.80 is paid. If you = : got the slickest films at ridiculousty low pricee—and what's don't want it, return it to the express agent, receive your $8.80 and return the machine more-——we now have « film exchange plan that's the best We will pay the return express charges. This machine is guaranteed just as if you ever. Of course we don't have to tell you that our films are the paid $100 00 for it. It ie standard. Over half a million people own and use these t. Let'snot miss this opportunity— Write to-day— NOW. typewriters and think them the best ores manufactured , mu bedi M NT MF The supply at this price is limited, the price will probably eo” bd Sotto ny: Brn be raised when next advertisement appears, so don't delay. : es sad Fill in the coupon today—the typewriter will be shipped promptly. There is no red tape. We employ no solicitore—no collectore—no chattel mortgage. It is simply understood that we retain title to the machine until full $48.80 ie paid, You cannot lose. You will perhape never have « greater typewriter opportunity, Do not us one cent. Get the coupon in the maiis to day—sure. Young Typewriter Co., ase non i ry" Chicago he

; Departmen | 66 ® Young Typewriter Co.,, 6. H°1e&., Chicago Ship me the Remington Monarch Typewriter, F. O. B. Chicago, as described in this advertisement I will pay you $4.00 monthly as rent until the $40.00 balance of the SPECIAL $48.80 sale price is paid. The title to remain in you until fully paid for. It is understood that I have five days in which to examine and try the typewriter. If I choose not to keep it I will carefully repack it and return it to the express agent. It ie understood that you give the standard guarantee ) Business or Occupation Johnson Smith & Co., 1218 Washington Ave., Dept. 947, Racine, Wi Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Engine Prices Never in three quarters of a cen- HIT BOTTOM pave ws otered such Read this new schedule money Saaving ob ortunities | in of prices; and then act! iamond 4 equaling those shown bere.” And, Remember-— you ere’s why can i Be. an hie are getting these oldfirm—ratedatover$i.ow.000.00 | | Prices on the FAMOUS —the most dependable engine on the market. Easier tostart; Pulls more than its rated H-P. BOOK FREE Write usual qualities — at an entirely different price basis — viz: loan values not market values. At our Ottawa Mig. Co., Beet t bay ean oniee teaton, 534-3 King we Brsimonda of Semrabie gaality y= a wise eat Scain mn ——y ~,A—* Leta Be Vt unl p= a prices. Latest List Diamond Loans Office 1999 DeRoy, Bidg., Pittsb Withoat —— send me free, your latest Bargain Diamonds atches and other jewelry. HET CATALOG! Write today for your co Save 50%-direct from Mfrs. af No Middleman’s Profit, OUR SPECIAL:8 room E lectric ; et ready to hang — ' i, other bargains. UNITED ge hy FIXTURE co. 280 Bowery, [x . New York City Use the newest, Treat most effective treatment Yourself For that modernscienceoffers - to drive out aches, pains, Anaemia soreness and weakness, Nervousness Remove the cause, wheth- Insomnia er in b'eod, bone, nerve | Rheumatisn or tissue. Pleasant and — absolutely harmless, but imples onderful in beneficial and cur- Falling Hair ative results. Thousands of Weak Eyes users restored to heaith. Neuralgia Headaches Setes Agents Wanted— Lumbago todemonstrate and sell this wonderful home appliance. Big Book FREE Pleasant, profitable. Write for attractive proposition. Unlimited money making possibilities offered through the agency for the sale of GAS FIRE Oil Burners. The highest class heat producing appliances of the kind in the world. Made of heavy brass; not scaly, rusty g¢ us pipe camouflaged with iron castings. Self de-carbonizing generators. Write for full particulars at once. HEAT APPLIANCE CORPORATION 111 North May Street CHICAGO, ILLS. Ra-Tone Electric Co. POONER ay ‘Michigan TheDerfected VIOLET DA SOOO SESE ESE SEES EEE EEE EEE EEE HEHEHE HEHEHE HHEHSH HHH E HE ‘ian oo =—@ “a ee — Ue ee ee = © sem of & a

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POPULAR MECHANICS ADVERTISING SECTION Put on like Plaster Wears like Iron -waterproof Lfi reproof & resilient _ k describing your REX Violet Ray outfits, and details of your $1.00 offer f Name ( Address City __ State. Please Mention Popular M¢

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POPULAR MECHANICS ADVERTISING SECTION R, I have averaged °7000 Per Year for Three Years—Have Made Over $90 PROFIT in One Day”’ That is the statement of Frank DePries, live-wire representatives. Keeton of Mississippi $252 on his first sale. ° Vickers of Alabama one of our made made $118 in one week. come with us. We have a plan whereby our active workers can get @ Ford without cost, in addition to their big cash earnings. Get the plan—quick! Conant quit a $6,000 job to \ AGENTS WANTED © We need more men like these, because the demand for our Super Fyr-Fyter is growing by leaps and bounds. homes, hotels, auto owners. willing to work and ambitious to make some real money, get our plan. You need no experience, as we train you without cost for the work. No great capital required. THE FYR-FYTER COMPANY 1730 Fyr-Fyter a, Sells to garages, stores, factories, schools, Approved by the Underwriters. If you are Good territory going fast. Better write us at once, Dayton, Ohio a creme cee Day —— WiFi ‘ : O This is | aa ae Outdoor Use Why Risk Your ~“Expensive Watch? — atti The New Yankee $ 2 Vanber Rediolne $7.00 Don’t senda penny. Ten days’ Trial. When the ring comes, examine it — if youare not convinced it is the Greatest Bargain in America, send it back at our expense. 4 pleased, send $1.50 week! —at the rate of a tow cents a day. This Bargain Cluster Ring with 7 Blue- White Perfect Cut Dia- Monds can be yours, No F Red Tape. No Risk. Looks like 350=Solitaire NO. 61 N08 MivouvG YY TION warn e }* ic- tures coe is of -Address Dept. Al716 ON ECO\G aiden Lane N.Y. Big NOW Prices Smashed on this 30 better, faster cutting machine. F.0.8. 0.8. Ottew Saws logs, limbs; falls trees. 10-year —y Guarantee. Cash or Easy Terms. From Pittsbur gh; -» BE FREE 200K and SPECIAL OFFER, Write quick before sale ends! Pa. 97.25 —every day you work. Make $5,000 to $10,000 a year in the Floor Surfacing Business with the American ‘‘Universal’’ method. Work for your- self. Experience, special training or large in- vestment unnecessary. New Field; Big Profits Better floors are demanded everywhere. Ameri- can “Universal” electric machine, doing work of six men, assures BIG PROFITS in this new uncrowded field. Every floor,—old or new,—in town or city, is your prospect. Work easy to get. Profit possibilities un- limited. Positive guarantee and 5-day Write today 3 trial offer protects you. 5 ’ for complete details. = AMERICAN FLOOR SS SURFACING MACHINE CO. S 523 S. St. Clair St.. TOLEDO, OHIO 74 OrrawAa. Kans. OTTAWA MFG. CO. Roop 1743.9, Mages ite s Yo 4 Ege nT seed i ho Brings 5 With HB Pi and « otemes Increased earnings and profits fr a business gained by itprove e easily pay balance on $ terms. Good free air serv Night pulls trade, brings ers. Helps you sell tires, oil gas and accessories. Ex y e Day and compact construction er use the HB Compres space. QUIETEST “OPI RAT- NG outfit on the market. Entirely automatic 120-140 pounds or higher 24 hours per day. F eet capacity. Saves curre nt, due to compact single unit construction y equipped, wine ly to ° and operate t : easy terms Satiefaction guar- anteed under our mone) back guarantee. Write for Information. HOBART BROS. CO., Box M-63, Troy. Obie Absolute Satisfaction Guaranteed or Back ae a 4.98 20° 3 J oe 8 gee, |) QO" oa |

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POPULAR MECHANICS ADVERTISING SECTION 149 FREE CORD TIRES ¢ YAW Make Big Money without risking.one cent. I'll start you as ! have started so many others in a business of your own. All or part time. The MELLINGER for e Auto -Whe PLAN is revolutionizing the tire business. No Sharp turns are easy for the Auto-Wheel Coaster ae Seen ; even with the heaviest load. The special hound Pll Show You How to Make ; brace which runs from the tongue through the More Money T 3 steering pivot to the bed of the wagon gives you the Orders for Mellinger Tires supporting strength which you need for easy steering. a ey eo Pep ee handle. Mellinger Cord Tires under the MEL. LINGER PLAN. No experience necessary. \\\ . My plan literally guarantees your success without risk or investment. Th: sands of | car owners say Mellinger Tires are the finest / Coasters and Auto-Carts cate pte be This special hound brace is only one of the features which a make Auto-Wheel Coasters sturdy, substantial, easy to Guaranteed by Bond a] control. Other features are: rubber-tired disc wheels, steel- 4 tired disc or wood spoke wheels—all wheels interchange- I 2,000 Miles able—hand brake, special hub ‘cap and locking pin, sides Sharp turns are . RES. j mortised as well as nailed, self-contained roller bearings. Mellinger Hand-made, Oversize, Cords are the finest, most service- H Write for catalog which shows all models of the Auto- able made. Super-vitalized rubber makes riding easy. New bead 4 heel Coaster and the Auto-Cart, the construction. My exclusive tread, protected by U. S. Patent No Auto-Wheel’s junior companion for little 68612, gives 10% greater wearing surface. I specifically guarantee brother and sister. Send the names and by legal bond, Mellinger Cord Th res 12,000 miles. Most ma addresses of three local coaster wagon facturers do not guarantee mileas The motorist uses their tires : dealers, and we will give you a year's at his own risk. t subertipGen SEES te the Aatonwnee Lowest Wholesale Prices in America! ; Spokesman,” a dandy mag- M ! azine for boys. Get My Inside Money Saving Figures! By Short Story Writing Contest . F This picture shows the en. Write for Particulars and ree Master Salesman uto-Cart WIN A PRIZE I send this sample Kit absolutely Fre \ i substantially bound portfolio containing good 4 Auto Wheel Coaster Co. inc, size samples of fabric, cord, rubber, ct tions cut from tires and pure gum tube In North Tonawanda, N. Y, 5 Minutes you can demonstrate tire secrets that the ny jealer knows nothing about oupne FR Wonderful Book This Kit was developed by a Mellinger Agent Polis how te tenn tenttente— how who sells « + $50, 000 worth of tires annua yao, antnate. game - It's] Ke taking a prospect through ness oe =e. the Factory. The Kit sells the prospect and — ire “Hestmetheda, quickly iy for antaen snd Batre I take the or i r This Star Salesman’s Kit qpienitd art, Make big profits. ‘Write vogey for this fine is very expensive, but I will gladly send it t lustrated, free “bo: Dock and cur amantes ofl won Seen ff you on lead earnest Northwestern School of Taxiderer, A177 Elwood Bldg. Omaha, Neb. 9 If You Own. a Car! re Rid F y AT OUR Write me quick ther Me 4 @ or a s EXPENSE Agent in your lo« a tv, iw want one w r q — to show and recommend Mellinger Tir | Ride for 30 days at our expense — the dandiest siya arn ed Tires prey 7 : or a iittie Of your time and enthusiasm, | w wheel made—the bike they are all make you 8 surprising offer that will give you a set of tires FRE] talking about — the latest model, -- the first from your locality to get my Confidential offer. Mail 1 ; ped the coupon, today—right now: tear it off now. It's your big oppor- electrically equip . tunity. Get my big free book that has proven the golden key t : BLACK BEAUTY |§ == #5) Shipped express prepaid—direct from factory B. L. MELLINGER, President 1 . repa) irect fr actor RAT- at wholesale price. Guaranteed 5 years; MELLINGER TIRE @ RUBBER CO. arket. 6 months’ insurance against accident. 1706 Grand Ave., Kansas City, Mo. = y, 30 days’ trial. Large selection of . . Seeesecesssenmessesesassasceces teet / models and colors. Lamps, horns, Mellinger Tire & Rubber Co., : due tires, brake parts, rims. 1706 Grand Ave., Kansas City, Mo. ‘ uot SUPPLIE Everything for the bike at s Without obligation, send me details of the M nger Pla Fr : 7 WHOLESALE PRICES. | § Book and Wholesale Prices and how, without investing money, I can § 2 Get a big Black Beauty Catalog — it's FREI become your authorized agent 2 guar- HAVERFORD CVCLE Ci CO.OF PA, 7 H oney- Established 26 Name H te for DEPT. 376 PHILADELPHIA : roy, Ohie Be a Black Beauty Agent Address. . 5 - Please Mention Popular Mechanics

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No More Punctures! O need to’buy new tires this year. You can get double the mileage out of the old ones by injecting a 25c tube of Neverleak Tire Fluid into each tire. It’s the best insurance you can have against trouble from de- structive cuts, punctures and porous conditions. It makes your tires absolutely leak-proof. Just think of the trouble, delays and expense it will save. NEVERLEAK TIRE FLUID Heals Punctures on the Run Neverleak isthe old reli- able tire fluid that has been giving entire satisfaction for over a quarter of a century. It never fails to do its work and as it preserves the rub- ber and fabric, it doubles the life of the tires. Don’t allow your dealer to sell you something ‘‘just as good,”’ but be sure you get the orig- inal. Look for the signature on the yellow, green and white tube. Buffalo Specialty Company BUFFALO, N. Y. Please Mention Popular Mechanics POPULAR MECHANICS ADVERTISING SECTION 1 ThisBig Book The latest edition of thegreatest Automobile Supply in America isjust off the press. Send for your copy atonce, before the supply is exhausted Contains over 3,000 bargainsin stand- ard repair parts and accessories—spe- cial bodies, tires, tools, etc., all of guaranteed quality. Buy at Wholesale Prices Our policy, “The highest quality at the lowest price,” is made possible because we buy for cash and sell! for cash. The prices shown at the left are “= only a few of the many bargains shown in our big free book. Get your copy now and start saving money by buy- ing your supplies from Nemco Bargain Supply House 37 N. Peoria Street, Chicago, Illinois SEND for the INTERNATIONAL CATALOG FOR Our net price list FoRD— Full line o on be 80 La from "ger! ies to e $27.85 Fords at up. Wholessie Factory Prices. toCon- Pave bis sumer money direct— bodies by Pay only one profit. direct trom factory. International Body Works, °* “; Ohio Street! Ch Chicago, Ill. MAKE A MOTOR CYCLE ou ¥ OF YOUR BICYCLE with TEFFEY MOTOR ATTACHMENT RE- 4 ABLE — ECONOMICAL PP ag ge nee oh — a y to attach. Fits any wheel. Send stamp for circu! STEFFEY MFG. CO., Dept. P, 5025 Brown St., Phila., Pa. MOTOR REPAIR BOOK FREE Why spend dol- lars for motor and household repairs when a few cents’ worth of SMOOTH-ONCEMENTNo.1 will do? Write for FREE book and learn bow Smooth-On can save you many dollars. Sold by Hardware and General Stores in 6-oz. tins 30c by mail, add 6c); also in 1-Ib., ib. and larger sizes. SMOOTH.ON MFG. C Dept. 37-F, Jersey City, N. 3. U.S.A SMOOTH: ON IRON CEMENT N° For Motor and Household Repairs De: om am I — Passel ~~. —

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st ca oy of 4) at le or re vt y- SEND NO MONEY “A Business Man’s Watch” SOLID Gold Emblem; = Gold Shell Case Elgin x Mc ement —12 size Thin Model 25 25 Years’ Guarantee Fancy Silver Dial pate ny The me and the Watch will be sent for inspection. BUFFALO JEWELRY MFG. CO. “The Mail-Order House” Dept Ss, Brisbane risbene Bidge BUFFALO, WN. Y. ~ MOTORCYCLES ONE Y! EAR TO PAY. Know the joy of owning—for business or} pleasure—a ge son, Excelsior, Henderson, Ind Cleveland, or any other Standard make; thoroughly rebuilt in our own facto ory- Write Jor Free Bargain Bulletin and Easy Payment Plan. HAVERFORD CYCLE CO., OF PENNA. Amorios’ s Largest Cycle House Established 26 years 503 Market St., Phila., Pa., Dept. P. M. 1 ons colored stripes. h est quality madra d poplin. Soft nished bea ily Sizes from 14 to 17. Ties of finest T. Fast colors. “Pull len Send No ‘Money ; Just name and size o shirts. Pay postman $3.79 on e ostage SATISFACTION GUARANTECD. - FREE A_dand dy pair of snap on Cuff ~ eee | FREE, if you send cash with orde = Rush Orders Now. 5 for Free € Sssatapey Barguine s\\ | PUBLIC TRADING CO., 404 Fourth Ave., Dept. 251, New York TOBACCO HABIT CURED OR NO PAY Any form, cigars, cigarettes, pipe, chewing or snuff. Guaranteed. Harmless. Complete treatment sent on trial. Costs $1.00 if it cures. Nothing if it fails. SUPERBA CO., E-41, BALTIMORE, MD. n ee Catalo of Money Sav Sarmiwe Eeceains to in clothing , snotruns, fishing tackle pod other sport- ing items await who send for this big! beautifully ilue- & trated free catal Enjoy sen- « sationally low prices. Write now for your free copy aramount T 34 West 26th Bt. New York \G POPULAR MECHANICS ADVERTISING SECTION 151 The Sport 0 Motorcyclin —gives you a new thrill. As you whiz through the country astride your responsive steed of steel, you feel the world is yours Take fishing - with an INDIAN Motocycle you can comfortably and cheaply reach your favorite sport more quickly than by any other means. Or try the new, far away fishing haunts, where woods are deeper and sport better No road too narrow, or hill too steep for INDIAN Motocycle. With an INDIAN Motocycle, you can make your half holidays like full days of sport: each week end a real vacation. For motorcycling is sO inexpensive, you can enjoy it to the full. The initial cost—as well as upkeep—fits the pocket of the average man. INDIAN Scout is the most popular, eco- nomical medium weight motorcycle. Lower, 100 pounds lighter than the average, 75 miles to a gallon, $250; electrically equipped, $285, F.O. B. Easy payments. INDIAN Big Chief 74, 9 h.p. 74 cubic inch motor, is the very latest in motorcycle engineering. Ideal for heavy duty side car work, $345 F. O. B. Easy payments Get a free road ride at your dealers Write us, Dept. P6, for nearest dealer's name and free illustrated booklet HENDEE MANUFACTURING CO. SPRINGFIELD, MASS. Moatocycle Please Mention Popular Mechanics

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GET RID OF THIS with no effort at all! Here is the easiest way in the world to rid yourself of that useless, joke-inviting, health-menacing paunch! Simply fasten on Dr. Lawton’s Automatic Waistline Reducer— and the flabby flesh will van- ish. Absolutely automatically! For men and women. DR. LAWTON’S AUTOMATIC WAISTLINE REDUCER Hour by hour, with every breath you take and every step you make, the Waistline Reducer’s Vacuum Applica- tor massages away unwanted bulge. Made of soft, pliable, glove-like rubber. Fits snugly and comfortably to the figure. Weighs but few ounces. Flexible as a handkerchief. SATISFACTION A SURETY Dr. Lawton's Automatic Waist- line Reducer is sold under a alr guarantee bond of absolute sat- isfaction. Your money back if you do not like it when you get it. Write now—this minute—to Dr. Lawton for full description, convincing literature and low price. Mail the inquiry blank below now to DR. THOMAS LAWTON Dept. 508, 120 Ww. 70th \ Street, New York City Dr. Thomas Lawton, ‘Dept. 308, 120 W. 70th St., New York City Dear Sir:—Send me complete description of Dr. Lawton’s hutuatie Waistline Reducer, convincing gt and yt te and tell me how low itis priced. This obligates me in no if) ° a SENeP=-Seree =—CCO1ao- 200000 SCAMASOoOUanang Send No Money Write us and tell ‘os he siue gt your tires and how many you want. Ship . with section un- wrapped for inspection. Money back if not satisfied. CHARLES TIRE CORPORATION Dept. 682 1440 Michigan Avenue, Chicago, I. POPULAR MECHANICS ADVERTISING SECTION RrMrwPrIrTTyT AT BHT eee A ore for nearly ten years a Carnes Artificial Arm has kept Mr. Pahhe Yazze of Lawrence, Kan., on the payroll as a draftsman and machinist at a good salary. Thousands of other mechanics, artisans, office workers, farmers and laborers owe their aeeemane to this improved arm, Life-Like in Action and Appearance The Carnes Arm cannot be detected from the natural except by close inspection. Its user can dress himself, use knife, fork, pen, pencil and keys; pick up large or small objects, carry grips—in fact, do virtually every- thing that was possible before. He can bend the elbow of the Carnes Arm, bend and turn the wrist and open and close the fingers at will, even if the amputation is at the shoulder. A book of 192 es, profusely 192- ~Page Book FREE. illustrated with photographs showing at can be done with this remarkable invention, will be sent free to any person interested Send for it now. CARNES ARTIFICIAL LIMB CO., 208 Carnes Bidg., Kansas City, Mo. Straightens Shoulders— Increases Pep THE NATURAL BODY BRACE — Corrects stooping shoulders,straightens the back, gives the lungs chance for normal expansion, induces proper breathing. Brings rest ful relief, comfort, energy and pep. For men and women Costs nothing to try it Write for 30 days’ free trial offer and free book NATURAL BODY BRACE CO. HOWARD C. RASH, President 64 Rash Building, Salina, Kansas I know because I was Deaf and had Head Nolses for over 30 years. My invisible Antiseptic Ear Drums re stored my hearing and stopped Head Noises, and wil! do it for you. They pro Sy Megaphones. Cannot be se¢n when worn. Effective when Deafness is caused Drums. Easy a a ip.cesy to take out, Are “Unseen comforts.” Inexpensive. my sworn statement of how I recovered my hearing. A. O. LEONARD. Suite 226, 70 Sth Avenue, New York City NO MORE BALD HEADS HED our v40u0m OAP ie used a few minutes daily. We accept no pay antil you have tried the Usp 60 days and are satisfied The Vacuum Oap is an appliance that draws the blood to the Hair Roots and starts a new healthy crop of hair. It stops Dandrof stops the hair from falling out Doctors and men who know that it is the only Bought b reasonable HAIR GROWER known to ecience. No Drugs Write for application blank, testimonials, and booklet on “ HAIR,” sent sealed in plain envelope, FREE THE MODERN VACUUM CAP CO. K 549 BARCLAY, DENVER, COLO. , -. / ee wha teat oak eo eo eo oats tes kl

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POPULAR MECHANICS ADVERTISING SECTION 153 STOP USING A TRUSS Do Away With Steel And Rubber Bands FREE to nce RELY Fn eee who may @ sufficient o ( {tively convince them that thin te the only logical, comm sense way of treating rupture. Plapao ise highly astringent nm medication placed within the Plapao-Pad and Tp ural through the , creates a wonderful feeling of relief anc at self the same time tends to strengthen the weakened muscles and c TS a 5 ‘ea’ Di recov atura. i —you can . . . ery- throw it ewa Sotowall Old and young have testified under Ladies Diamond Solitaire Ring bow = saat She apao-Pads cured cle centupe—many of — Examinati FREE =| tanding, vated cases—without delay from work. —y Patent allowed in . 8. and foreign eountries. Awarded Gold on Medal at Rome and Grand Prix at Paris. . TF —~ Send No per eamicient quantity of the Plapeo This exquisite, blue- sent wit tc t to thi . _ a . will give it @ thorough test; you psy nothing for this trial now or mums §=white perfectly cut Dia- ever, Write for it and full information today. Address mond, in ladies’ 14K Plapao Laboratories, Block 1427 8t Louis, Mo. DOWN solid-gold setting will be Mo. _ eee nel sent FREE of charge, all — transportation charges prepaid, for your *>— NO JOKE oO E EAF examination. If satisfied, pay only $2.00 —Every Deaf erson A at { make — balance at $4.30 a month for ten myself hear, after being deaf for 26 years, months. Buying direct assures you this stooping with these Artificial Ear Drums. £ peck Bostom Price, on easy credit terms. ance for l wear them day and night. They fake advantage of this amazing offer . ngs rest- are perfectly comfortable. No one TODAY! Only $4.30a month after you I women sees them. Write me and " will have examined the ring and find it all and more pig FF 4 t.. than you expected. If not satisfied, simply return » book Address * Me Ear Drum —examination will have cost you nothing. Pat. ov. 3, 1906 . GEO. P. WAY, Artificial Ear Drum Co. (Inc.) No Security! No Red Tape! ina, Kansas 80 McKerchey Bui 2631 Woodward Avenue, Detroit, Michigan We Gladly Trust You RY —— seus 56 fer Buchstein’s Fibre Limb } ree & - . is soothing to ay ea —strong, cool, C ind Wi nea ght. y pa’ t 3 nnot be Braces for al! delormition yo ae caused ter Conané D. BUCHSTEIN Co. eae ee i> Catalon Today 113 6th St. S., MINNEAPOLIS, MINM. and Gift Book ever at, Are a published. é let an Blackheads, Acne ons, ng. PIMPLE Oily and Shiny Sein onichiy Let us send you FREE i ; this beautiful De Luxe x Cir tg hp eee oc Catalog No. 63L. Con RR o - - 4 - d guarantee mailed with every bottle. — "a on colors, FREE]! Valuable booklet explaining cause and Gerd Begortment of ee Cure of Skin Eruptions sent on request, exquisite designs in Dia- &: Read what SMOOTH-SKIN has done for others after moods. Watches and *, years of suffering. ewelry. Ten months to pay on everything. § — Special Offer To New Customers. rite today! Address Dept. 63L. x putes Puritan Chemical Co. Dept, 20, Kansas City, Moe, Capital $1,000,000 ie D pay ee Oo ) “ mr E= ~ THE HOUSE OF QUALITY ce =! | [Learn Drafting || Bava" if ‘SWEET —_ Individual study at home may be s fully P ' out. 0 m™m successtu only engaged in with the aid of our new enlarged book 1650 “660 BROADWAY, NEW YORK. )rugs ‘ond A Practical Course in Mechanical Drawing a - REE Cloth. 160 Pages. 157 Drawings. Price, 50c Postpaid. . a. “0 Popular Mechanics Book Dept., 200 E. Ontario St., Chicago. ~U. Please Mention Popular Mechanics

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154

THE HEIGHT OF EFFICIENCY 3 gS eee - . ¥ A fj

ro NCIN NS, Price $55 For Sale by Best Dealers Everywhere. Write for a show- ing complete Crosley line. New York Office, C. B. Cooper, 1803 Tribune Bldg., 154 Nassau St. Boston Office, B. H. Smith, 929 Blue Hill Ave., Dorchester Chicago Office, 1311 Steger Bidg., 28 E. Jackson Bivd., R. A. Stemm, Mer. CROSLEY MANUFACTURING COMPANY 615 Alfred St. Cincinnati, O.

Remarkable | Regenerative Model Vv 20 Receivers Formerly Known as . : Crosley Model VC

A GREAT SUMMER SELLER Licensed under Armstrong U. S. Patent No. 1,113,149. Free Catalog on Request. THE PRECISION EQUIPMENT CO. “Powel Crosley Jr. Prendent

615 Gilbert Ave. | Cincinnati, O. Write for 64 Pg Catalog. } wht RADIO DEALERS 223" — RADIO MFG. CO. nonce ticy, mo. POPULAR MECHANICS ADVERTISING SECTION

our Radio Set Work Better Perfect reception can be had only when wire connections are soldered. SOLDERALL and a match make perfect joints — guaranteed equal to wire or bar solder. At leading Jobbers and Dealers or sent postpaid for 25c a tube SOLDERALL CO., Dept. P, Newark, N. J, SO LDERALL A Metal in Paste Form ARULBRESILLIS7Z,

MN

x S = 5 g 4,

Ldahabadebededa dodo rs dy Automobile Prices A Better ~~ — Be Built t wae Chew Buitchen, "Hur The best of material—careful con- By “$8 struction by skilled mechanics— makes a battery that will give s long life of hard service. Sold Gress | from factory to you. Sue uarantee. Overland, Buick Reo, Paige, Stude: gO AS Do 4 Regal Prank. Briscoe and Crow-Elkhar Give year and model onan Hudson, Nash, 12 A writtes You take no chance orld Rattery—it is the most satisfac- = Reabocy you can get and you save the dealer's profit.

tes WW

DICTOGRAPH PRODUCTS CORP 220 W.42nd St. New York

RADIO PRICES 6 Volt. 60 Amps.$10.00 6 Volt. 80 Amps. 12.50 6 vole 100 Amps, 14.50 6 Volt. 120 Amps. 16.00 5% discount for cash with order, or will ship C.O. D, Subject to inspection. All orders shipped same day as received. 10°x2 1217 Wabash Ave., Chicage

id TONE Lon istance Arm- strong Regenerative Radio Receiv- ing Set, which we sell, complete with batteries, tubes, head set and aerial — all ready to listen to concerts—on easy pay- Send Ses - MAGNETITE RADIO CRYSTAL—the world's most sensitive and efficient Crystal Detector. GIBBONS-DUSTIN RADIO MFG. CO. 518 West Sth St., Los Angeles, California

HIS Crystal Detector unaffected by handling moisture and will render eff- cient service indefini te Price 50c at all deale mailed direct.

ee re

fs, TT

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e Built ful con- lanics— give a t satisfac- save the , or will recel ved.

j a a eB

POPULAR MECHANICS ADVERTISING SECTION

Radio Fans! TUNE IN WITH THE NEW “UNITED” PLATE CONDENSER VERNIER increase re- ng range and tune out in- ence of all yyy Attach to any plate condenser by drilling one hole. iggest little = ng in Radio. pala lee $2.50 “United” Variable Condensers with New Plate Condenser Vernier te, $6.50 23 plate, $6.00 11 plate, $5.50 5 plate, $2.50 3 plate, $2.25 Mailed on Receipt of Price “United” Audio Frequency Transformer Magnetically shielded, $4.50 Ask your dealer first. If he can’t supply you remit to us. Our money-back guarantee fully protects you. United Manufacturing & Distributing Co. | Lake Shore Drive CHICAGO, ILL, = = xn = _— = — = = =. . < = —

Cartoonists! The inspiration so necessary for success, as well as valuable hints re- garding technique, methods of work style will be yours if you equip yourself ‘h portfolios of the work of the greatest cartoonists. Just such portfolios are the BOUND VOLUMES OF CARTOONS MAGAZINE Here you find the best cartoons of Darling, Cesare, McCutcheon, Carter, Kirby and scores of other master cartoonists of this and other countries. PRICE $2 PER VOLUME POSTPAID WITHIN THE REACH OF ALL Thi nk of it! These durable and attractively nd books (all new) each covering six months and containing 1200 cartoons, 900 pages (7 x914 in.) 3 in. thick will be sold separately as long as the limited supply lasts at little more than cost of binding. Make your selection from the following list and send i an order at once. Vol, 11—January—June - 191 Vol. 12— i om ol 1917 Part of ol. 13—January—June - 1918 World War Period Vol. 14—July—December - 1918 Vol. 15—January—June - 1919 Vol. 16—July—December - 1919 Vol. 17—January—June - 1920 Vol. 18—July—December - 1920 Address: POPULAR MECHANICS BOOK DEPT. , 200 E. Ontario St. Chicago

Price: oys0 F ROST RADIO PROTECTOR Has TAREE Big Features 1. The Frost Radio Protector is self-cleaning. 2. Positively no interference with radio reception. 3. Mounts indoors like your telephone protector. Under new rules as revised May, 1922, every radio receiving station with outdoor aerial must use ansapproved protector. Frost “Sawtooth” self-cleaning protect is best for your set,. Get one from your dealer tod; ‘ -

proved by Underwritet revised regulations dated 5 HERBERT f w 154 WEST LAKE STREET, Chi [Fe Frost Radio ACT . US Linc LLINOIS

Everyone who is looking for NEW PLAYS FOR CHILDREN will be interested in this announcement. The greatest plays being written for cnildren today are those coming from the pen of T. C. O'Donnell. Whim- sical, full of color and charm, imag.native, these plays make a universal appeal to the child because of their delightful humor and naturalness, and to the teacher because they lend themselves so readily to the very simplest stage. Every play has a well-worked out plot, ylenty of action, surprise—yet can be “‘put on" in the _ room as easily as on a thoroughly equipped stage. The “JUST IMAGINE” Plays is the newest series of O'Donnell plays. The first two numbers are just off the press. They are: “THE SANDMAN’S BROTHER” AND “ANN’S HALF BIRTHDAY” Through a special arrangement with the publishers we are able to make the first announcement of this series to teachers of expression, grade and high-school teachers, Sunday- school teachers, teachers of dramatics in neighborhood center work, mothers and others interested in clean, whole- some, easily produced plays for little folks from fiy to twelve years of age Even if you are not interested in producing children’s plays you will find these plays fascinat- ing for the story or bedtime hour Each play is artistically printed and bound—the price, only 50¢ each, postpaid. Send $1 today for the two. POPULAR MECHANICS 200 East Ontario Street BOOK DEPT. CHICAGO, ILLINOIS

155

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POPULAR MECHANICS ADVERTISING SECTION Valuabl ‘This is the New BATTERY| FAR: DP ADIONH FREE |i your battery expense— ? how to get QUICKER iSTART from your ;motor. Shows how to j : have BRIGHTER LIGHTS and with The Adjustable PERFECT IGNITION by knowing more Air Gap That Tunes about your battery. Also tells how to charge Out All "“Harshness your battery at home for a nickel with Send for THE Invite your friends tonight. Sur- Free Book today MCHAR prise them with a real concert or dance. o The wonderful new Dictogrand will ‘ ! The world’s most create the illusion that the artists are popular rectifier. in the very room with you. Just go i & i to your dealer’s and hear this remark able, clear-toned instrument. Take it home and plug in for the finest entertainment you've ever known. Charges your , You don’t need extra batteries. RADI tt i Like all the other famous Dictograph 0 Ba f 7 Products, the Dictogrand is guaran- BOYS332% ABSOLUTELY FRFF ao your name and address and we ww), RUSH will tell you HOW you can get this RADIO SET Absolutely Free. RADIO SET comes complete, with single ‘ tuning coil, crystaldetect hone condenser. AND DOU. LE HEAD PHONES. }\ . teries required; no experienc Write Today for Free Radw Plan HOME SUPPLY CO., 131 Duane St., Dept. 829, New York City SEE YOUR DEALER FOR INFORMATION ABOUT FREE, —2 book that tells how to get bett RADISCO Radio Products results with radio tube sets. A WILLARD STORAGE BATTERY COM THE RADIO DISTRIBUTING CO., Newark,N.J.,U.S.A. CLEVELAND, OHIO BIG PROFITS in | OWN A MONEY MAKING BUSINESS soa, | Make*1500 03000 Yearly Charsing Batteries sh payment brings your H B8 Hour Charging Outfit Gas Coven of + — $30 monthly tet your profits pay batene h nice st aol Long free trialon ao renee guarantee lets ; ry outfit at our risk. Don't delay and let some competitor get ahead of y« une i ear Battery Charging Taho the tend poureate. Order your HB outfit NOW on * on il. Write today for full information and our easy-payment HOBART BROS. CO., Box M-67, Troy, Ohio | THIS REMARKABLE CRYSTAL is revolutionizing the possibilities of Crystal Sets. Unsolicited testimonials fron of the country report records of from 600 to 1200 miles with ordinary sets equi M. P. M. (Million Point Mineral) CRYSTALS Don’t discard your Crystal Set until you have given M. P.M. atrial. Send 25c and ».ame your Radio Dealer for sample unmounted crystal-—35c for mounted. Beware of I: M. P. M. SALES CO., Dept. P, 247 S. Central Ave., LOS ANGELES

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POPULAR MECHANICS Restful, Healthful Travel Those who have traveled on D. & C. Navigation Company Steamers, for business Or pleasure, have long come to associate every delight and comfort sutdoor travel with this line. Daily trips are made between Detroit and Buffalo; Detroit and Cleveland, on Eastern ‘Time. Train connections at Buffalo for Eastern and at Detroit for Western Points. Detroit & Buffalo | Detroit & Cleveland Lv. Detroit 6:30 | Lv. each cityl1 p.m. p. m. *Daylight trips dur- Lv. Buffalo 6:00 ing July and Au p.m | Ly. ae city 8: Fare, $6.00 one a. way,$11.50round | Fare, s. 60 one way, trip. | $6.60 round trip. Operation subject to necessity for service. chedule subject to change without notice Berths $1.80 up; staterooms, $4.20 up; parlor, $7.20 up. Rail tickets are accepted. Automobiles trans- ported Gas must be removed. Wireless equipment. For reservations and further infor- mation address, R. G. Stoddard, Gen. Pass. and Ticket Agt., Detroit, Mich. Detroit & Cleveland Navigation Company 4. A. Schantz J. T. McMillan Pres. & Gen. Mgr. Vice-Pres.

~ ” — Eee areT rebored smooth, to shoot Bird shot, 50 total length 41 inches, weight 7 7 Ibs $4. Bird shot cartridges for the above 3e each Barrels interchangeable for above « = = <« Army Krag Rifle, like new - © © © « « Send for Catalogue W.STOKES KIRK Pruiavevrnta PA.

FAULTLESS AUTO PRODUCTS fuultiess £7 Speed and Power Equipme

You can start a yw business at o wait. Get big mo wy you how-selling the Self-Heating Sad Iron ience necessary. sibilities great. A prospect. Satisfactio = Absolutely safe. Thous ™ Write today for prog Enterprise Toot & Metal Works, Dept. 36 2441-9 W. W

ADVERTISING SECTION

All Roads Lead to Joyland AYA“ ATION every week-end, a sport-spin” every evening, brisk, bracing trips all summer in the cool, clean country air—if you have a Harley- Davidson! Take any road—eveny

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POPULAR MECHANICS ADVERTISING SECTION For This Genuine 6 35 REMINGTON. ALL LATE IMPROVEMENTS BIGGEST VALUE EVER OFFERED! Think of it! A Genuine, Self-Starting Remington No. 10 (the | greatest advancement ever made in a typewriter)—a standard, thoroughly reliable machine — (guaranteed 5 years) with all the late i one poplin that will give you years of dependable service—and you save practically 70.00! Guaranteed Equal to New as regards character of work and speed. Compare it with a new ma- chine, and if you are not convinced beyond a/! doubt—if you do not feel it is all we claim after a 30 day trial, you ll not be out one cent! SEND TODAY A postal wil! do--for details of. our $2.00 down-direct- to-you selling plan. Learn why we can sell a genuine mi No. 10 at such a tremendous saving to-you! Or send $38.66 NOW and if not convinced it is the biggest value ever offered, your money returned promptly without question. Our references: Any Mercantile Agency or your bank. Address BROADWAY LINCOLN TYPEWRITER CO. se 7857 Onn AGENTS—Sell Towels Make $10 to $15 a day selling KNITTED towels. This is something brand-new in the towel line. Patented and fully guaranteed. Each towel put up in sealed, transparent and germ-proof packet. Ready to open and use. Sells on sight because price is low and value is great. Big commissions paid agents. We want both men and women. Experience not necessary. Write for full information; or bet- a still, send $1 for complete sample outfit and get busy at me doliar back if you are not satisfied with samples. sle Mills, Dept. 36 Iohia, Pa. About « Radio ::: 1925? Can You Keep Pace with Its Progress? While RADIO is now a very big institution, it is ; nevertheless, that there will be many new develop. ments, some new parts, and many new “hook-v before RADIO attains its final state of perfect n Can you keep track of all these changes—to-day to-morrow, in 1924, and in 1925? LEFAX RADIO HANDBOOK PERPETUALLY UP-TO-DATE! LEFAX RADIO HANDBOOK always keeps pace wit new developments in Radio—the book is loose-| and every month to every purchaser of the book is sent additional pages that keep the book up-to-date N — charge for this service for one year. Writ by the two chiefs of the RADIO dept. U.S. Bur: of Standards. Fine imitation morocco leather « Price $3.50 postpaid, complete with year’s service POPULAR MECHANICS BOOK DEPT. 200 E. Ontario St., CHICAGO l Popular Mechanics Books E4C# one of the following books has been published t Popular Mechanics and is characterized by the same « f editing and authoritative WY of the subject matt as is the magazine itself. All are unusually good values { the prices asked. THE BOY MECHANIC—BOOK ONE 480 Pages—700 Articles—800 Illus THE BOY MECHANIC—BOOK TWO es— 1000 Articles—995 Illus 480 Pag MISSION FURNITURE, HOW TO MAKE IT, PART 1 128 Pages—30 Designs, Ilus.. MISSION FURNITURE, HOW To MAKEIT, PART 2 128 Pages—32 Designs, Illus... MISSION FURNITURE, HOW TO MAKE iT, PART 3 128 Pages—36 Designs, Illus ,OOD-WORKING FOR AMATEUR CRAFTSMEN °8 Pages—i25 Illus RAFTS LAMPS, ‘How TO MAKE THEM 3ges—16 Designs, [lus or — ETCHING COURSE IN MECHANICAL DRAWING —~157 Drawings. ..cecesssesees ° us AAKE DEVICES FOR ‘OUTDOOR SPORTS. 64 Pages—Illus.. eee 2S FOR 1923 =S SERIES > he prices are postpaid. ‘R MECHANICS BOOK DEPT. 200 E. Ontario St., Chicago RE ee: rin I

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0 POPULAR MECHANICS ADVERTISING SECTION 159 4 CYCLE 5H. P. Weight Send for Catalogue! 7456 Jefferson Ave. E MARINE MOTORS DUBRIE MARINE MOTORS g 5O COMPLETE ‘. Bosch Magneto! Impulse Starter! 44 Ford Parts Used! Investigate To-day! DETROIT, MICH. ; J OUR BUREAU OF INFORMATION will answer all ques- tions regarding articles appearing in this magazine. Ad- dress Bureau of Information, Popular Mechanics Mag- azine, Chicago. FORD OWNERS F)¥ | Get 35 miles on a gallon of gas. Do away with carbon by using Keons Gas Saver, the wonderful new vention. Pays for itself in two weeks. Install it urself in five minutes. No mechanic needed. Send ne dollar with order at once. Balance C. O. D. rice $4.00 — $3.60 if paid cash in advance. CHICAGO ENGINEERING CO. Dept. A-12 120 E. 33rd Street CHICAGO, ILL. ave sj 20 YR §t4KT GOLD- FILLED CASE Arar 2 opportunity tobuy high grade wateh poree cost. 12 size, thin model, 20 14kt gold-filled case. Beautiful « fal. Handsomely chased border anJ back. Full jewel, well known movement. Regu- lated and adjusted to keep e excellent Order today. Send no money. Pay only $6.80 on arrival. Satisfaction guaranteed or money back. FREE: 14kt potd-filled Waldemar chain and knife if you order now. Supreme sJeweiry Mfg. Co. Dept. 720, 434 Broadway, New York Easy to Play Easy to Pay TRUE-TONE SAXOPHONE Easiest of all wind instru- ments to play and one of the most beautiful. You can learn the scale in an hour's practice and play popular music in a few weeks. You can take your place in a band within 90 days if you so desire. Unrivalled for home entertainment, church, lodge or school. In big demand for orchestra dance music. The portrait above is of Donald Clark, Soloist with J the famous Paul Whiteman’s Orchestra. You may order any Buescher Free Trial Instrument without paying in advance, and try it six days in your own home, without obligation. If perfectly satisfied, pay for iton easy payments. Mention theinstrument inter- ested in and a complete catalog will be mailed free BUESCHER BAND INSTRUMENT co. Makers of Everything in Band and Orchestra Instruments 2588 Buescher Block Elkhart, Indiana Saxophone Book Free Tells when to use Saxophone singly, in sextettes or in regular band; how to play from cello parts in orchestra, and many other things you would like — s a5 ae ee es ate ae ce cee alee: ieee lee aii eee ee Buescher Band Instrument Co ! | 2588 Buescher Block, Eikhart, Ind. 8 } Gentlemen: I am interested in the instrument checked below \ l Saxophone Cornet . Trombone... rrumpet.... (Mention any other instrument interested in 1 I | | PPPTTITTITITTTTTLITT TTT TTT 1 { Street Address a ee ee ee ee Peet " SD WWM ccccscsecnvceee BUAtS. coccccccecccccess i ee

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POPULAR MECHANICS ADVERTISING SECTION LAWL TYG 3 ¢ We'll Pay i IN | the Postage + °197«CARAT —_ — the receipt of 50c Sparkling, blue white, perfectly cut, 1 ship prepaid this uine diamonds are offered to you y AiG DIAMOND IMPORTERS BIG DISCOUNT FROM their regular price. Former bs FO and less. 40% SAV- INas'c OD DIAMONDS. ,GUARAN- TEED OR YOUR NEY RE- TURNED. Written aaaahen as to quality and exact weight sent with each diamond. WE TELL YOU ALL THE FACTS regarding the diamond you buy 8% YEARLY INCREASE diamond purchased from us has a yearly | —t in exchenge value of 8% guaranteed in writing. 30 DAYS’ FREE TRIAL ear any article of your choice on trial for 80 days. If not satisfied send it back and we will return every cent you paid. Free exam- ination at bank or exqgone office before paying deposit, if aired. ritten querentes that if any other jeweler in the U. S. can sel! you equa! merchandise for iess monez. you can = — . your money back. Un thie guarantee oseefe you cannot a on 4 ha ste = volume which tells how to make 16 beautiful designs of lamps. Simple reading lamps to elaborate chandeliers. This illustration shows one of the many beautiful designs contained in this volume. Theinstructions are so simple and so complete that anyone with the necessary tools and materials can make charming lamps for any room in the house. Arts Crafts Lamps HOW TO MAKE THEM Handsomely and durably bound in cloth, contains 9 es (5x7 in.), 50 “4S diagrams and working awings. Tells How to Make T'wo Light Portable— Port abie Reading—Four Light Chandelier— Reading Lamp- Dining Room Dome—Porch or Den Lantern—Four Light Ohain Hung Chandelier—One Light Portable I Lantern Drop Light—One Light Bracket—Piano Lamp—Wal! Lam; —Electric Candle Sconce—Newel Post Lamp—Chain Hung One Light Bracket. You can save money making lamps for yourself—and make money making lamps for others Send for the Price Prepaid 50c 81‘, Send us only 50c. We will ship this book to you p re- _ no matter where you live. Take advantage o s bargain price now. Anyone can afford to have it Put your evenings to profitable use. Send 50c Today POPULAR MECHANICS BOOK DEPT. 200 E. Ontario St., CHICAGO

uaeaaaobesoees banua~sk w —_—f&e cece eee eo ee oe =) Over a Hundred Styles and Sizes 172 NASSAU ST. Div.952 NEWYORK @ v/ Send for new illustrated catalog showing » 3 latest reduced prices. It’s Free. 10 days’ trial given Fords Run 34 Miles SENECA CAMERA MFG. COMPANY

300 Central Avenue Rochester, N.Y.

on Gallon of Gasoline WRITE TODAY for Our 168-PAGE D f Wonderful new carburetor. Guaranteed to re- _ Ss duce gasoline bills from one-half to one-third and FREE BOOK on ea ne ase . Oy ie ee Sa from 30 to 50%. Start | sod jearn how Perfect Hearing is now being restored SENT ON 30 DAYS’ TRIAL condition of deafness or defective hearing. Our “Litt less Phones for the Ears” require no medicine, but e! Fits any car. Attach yourself. Fords make as lace what is lacking or defective in the’ natural ear . ty. ‘Send male, rae cake ad They are simple devices, which the wearer easily fits Ege of car apecsl 90 ~ AGENTS W. ears, where they are invisible. Soft, safe and con fortab! AIR FRICTION CARBURETOR co. bert 2380 ee WILSON EAR DRUM CO., Incorporated 1079Inter-Southern Bldg. LOUISVILLE, KY. Special Bargain Introductory offer on i Kentucky’ s Finest Good Old Melon Fi b Li Li b obacc Sweet Green River Smoking Tobacco. l ibre aad ite Im Ss Two big 1-lb. cans, $2.00 value for Easy Payments—Do Nature’s Work. only 31.00 postpaid. Satisfaction guaranteed or money back. AGENTS WANTED who use Artificial i eg. G OWENSBORO TOBACCO CO.., Depi. 130, Owensboro, Ky. | pg BEENbre Semle. WORMAN CO. 282.5 HENNEPIN WANTED — RAILWAY MAIL CLERKS ; : ; | S$ 1 600 to $2 300 Year ~ FRANKLIN INSTITUTE, Dept. S178, Rochester, MEN — BOYS, 18 OR OVER # _Sirs: Send me without charge, (1) Specimen Railwa Clerk Examination questions; (2) List of governmer SHOULD WRITE IMMEDIATELY BP > yy a ee how I can get a position. Steady Work. No Layoffs. Paid Vacations. © Travel — See the Country ra SR cenciccoces<cccsnssestess * Se Common education sufficient. Mail coupon today—-SURE 9° déress.............+- windeth aiciddeeetanbadbiesinigenscess

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POPULAR MECHANICS ADVERTISING SECTION WE WANT AGENTS To introduce the Milburn Puncture Proof Inner Tube. Mr. P.H. Milburn, of the Milburn Puncture Proof Tube Company, Chicago, after many years of practical and theoretical experiments, has perfected an inner tube which in actual test suffered the loss of NO AIR after being punctured as many as 500 times. Many users have run over 20,000 miles without removing a tire from the wheel. Miéil- burn Puncture Proof Inner Tubes are made of the best quality live red gum rubber—especially built and air inflated. Milburn Puncture Proof Tubes cost no more than other ordinary tubes. CAR OWNERS WANTED To sell and demonstrate this wonder tube. Interests everyone immediately. Automobile owners buy on sight. It makes no difference what car they drive or what tires they use. Our salesmen are coining money on our “DIRECT FROM FACTORY” scheme of selling. Absolutely no competition. We control all basic patents. No capital required to start. Previous selling experience not necessary. Earn from *5000 to*10,000 a Year Earn $5000 to $10,000 yearly or more. Get into business for your- self. Sell Milburn Puncture Proof Inner Tubes. Every car owner isa prospect. Your field is unlimited. Now is the season. Get in while it is good. Be independent. TESTIMONIALS FR EE TU B E c inci Stat ts from a Few of cee Our Agents SPECIAL FREE TUBE OFFER 4 rs D. ay age have gee 20,000 | t > Mil Deamat > ave mat co'yen removed arm or easing ond any Send coupon or write today for special ye casings are stil! in excellent condition.” 1. . Sorvee-—"' puld 50 auburn Tubes ts free tube offer and further details. . . —_ wv 2 . ~ of . the first three days.” References, Industrial State Bank of Chi- 4 aay Cayton—*. I sold twelve tubes yester- cago, National Bank of the Republic, pag See ance Chicago, Baker State Bank of Chicago. . S. Knapp—“ My first few hours out I ~ £0, ~ > 7 = sold eight tubes, no trouble at all to sell them. Don’t hesitate. Fill out the coupon rhe most wonderful tube on the market today, . H : =_te _ I think. I am hoping you will give me the and send it in or write and se nd agency for a big territory.” name and we will send you all D. Edelere—‘'I have driven seventy-five ataile is j oO = nails in one of the 30x3 tubes, and twenty were de tails. This 1S your opportu spike nails, It has gone above the test that nity so don’t delay . Address you recommended to me it would do.” Ss. W. Dow—" Your tubes are fine; we have P. H. MILBURN, Pres. a 30x24 that has certainly stood the gaff; it has been punctured anywhere from forty to forty -five or fifty time, this week, and is stand- Milburn Puncture ~ up in great shape." Staples Brothers—“ Your tube arrived and Proof Tube Co. Se proved satisfactory in every--cespect We & 3 4 od o think we know a good thing when we see it and 335 West 47th Street “ St a KO would be pleased to represent THE MIL- py PUNCTURE-PROOF TUBE COM- *ANY.”

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POPULAR MECHANICS ADVERTISING SECTION Brings you this big Plumbing and Heating Encyclopedia-Catalog. Write for your copy without fail. Guaranteed Heating Plants Our Handy-Man Book shows how. Big 256-page well-bound encyclopedia of Plumbing and Heating Outfits, Systems, Supplies, Fixtures and Accessories— 10,000 items—illustrated. Hundreds of floor plans, elevations, diagrams, trade secrets, money and trouble-saving kinks, etc.,‘*How to save on in an lg repair ——_ a4 overy ousehoider, contractor, farmer, mechanic, institution needs this book Hot Water Boller Shows how to save wages, work and materials BIG “wax” BOOK MAN Tells how we help you plan and install From rough sketch or description we supply working plans and clear in- structions. We loan the tools needed Any handy man can install. This is the place to buy on money-back guaranty Plumbing Outfits and Supplies; Water Systems; Hot-Atr, Water or Steam Heating Plants: Radi- ators, Pipes, Boilers or Septic Disposal Tanks. Send 25¢ for Yours Today We have spared no effort or expense to complete this remarkable and instruc- tive book. To keep from sending it broadcast to disinterested persons, we request a deposit of 25c, which P will be refunded on your first ' (il order —or send for our —_«iillllilll FREE Bulletin. Write 49\\\\|\\ today and save ; . it Pipeless Furnace half. HARDIN-LAVIN CO 50 Years 1 at 4547-57 | Cottage Grove Ave., CHICAGO

J < «

BIASCOPE A sturdy, compact pocket field glass. For the motorist, tourist, boy scout, bird study. Dimensions354"x3 "x14". Bich ondalianies "$500 WATRY & HEIDKAMP ESTABLISHED 1883 Dept. P, 17 W. Randolph St., Chicago, Ill.

Our BUREAU OF INFORMATION will answer all ques- tions regarding articles in this magazine. Address Popular Mechanics Magazine, Chicago.

EASY FOR YOU TO OWN a | FINE INSTRUMENT! EARS ago the famous King Brass Instruments were sold only for cash to famous musicians. But now due to our easy payment plan anyone can own one of these wonderful instruments. SAVE MIDDLEMAN’S PROFITS Saale order direct from the factory. You save middleman’s profit— and you get a fine, new, sound- laboratorytested, acoustically perfect King Instrument. With it goes our guarantee plus free factory-service. IT’S EASY TO OWN A KING Rebuilt instruments, refinished to look like new, we sell forcash at lowprices. Newinstruments on theeasy pay- ment plan. Thus it’s “easy toown a King’”’. Send for our latest complete catalog and list of special bargains. THE H. N. WHITE COMPANY 5249 Superior Avenue Cleveland, Ohio

PERSONAL STATIONERY | Be distinctive—have your own stationery. Send cash or moncy ]. order for 200 sheets, 100 envelopes, postpaid, printed in blue ink with ONLY Je name and address, not over 3 lines tor 50 characters),on good white bond, sheets 6x7 Personal Printing Co, Box 52554, Boston, Mass. Reference Imeerectmomel | rust Co Bone FORD RUNS 57 MILES ON GALLON OF GASOLINE A new automatic and se'f-regulating device has been in by John A. Stransky, 15 Fourth St., Pukwana, South D with which automobiles have made from 40 to 57 mil gallon of gasoline. It removes all carbon and prevents plug trouble and overheating. It can be installed by a: in five minutes. Mr. Stransky wants agents and is v to send a sample at his own risk. Write him today.

Chewing Gum Ic per pack Full size —5 stick packs — spearn peppermint and fruit flavers. $5.0 500 packs. Suitable for Premiut Scheme purposes. Deposit requ Prompt shipments. HELMET GUM MAKERS, Cincinnati, Ohio, Our BUREAU OF INFORMATION will answer all ‘ques

| tions regarding articles appearing in this magazine Address Bureau of Information, Popular Mechenics Magazine, Chicago.

“aque ADD TO YOUR INCOME WITH LITTLE EFFORT $5 to $10 EASY WITH “AMERICAN’ Key Cute!

New Improved Green Automatic Machine Sharpens, Hones and Strops all kinds of safety razor blades, in one operation. from four to six blades per minute. For both Quality and Quantit is nothing like it on the market. Let us send you our y, this machine isin a .lass by itself. There deseriptive literature explaining everything, including the “‘AMERICAN” Key Cutter—cuts square, angular or round slots AMERICAN SHARPENING MACHINE CO. (inc.), Dept.¢,184 W. Washington St, CHICAGO

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pqu pti, Ohio all ques- naga zine leche nics AMERICAN’ ey Cuiter POPULAR MECHANICS ADVERTISING SECTION Glands Used to Restore Hair Growth ,ce of Gland Therapy Relieves Baldness— Treatment Restores Health and Growth dness in both men and women is now gen- ascribed by scientists to defective func- g of endocrine glands. Hair growth is ndent upon the secretions of these glands— secretions making possible the assimilation se elements in the blood which are vital to irious growth of hair. Now it is possible for any bald person to have full, luxuriant growth of hair through the dis- covery of E. R. Alexander, nationally known scientist. Dr. Alexander, through the concentra- of glands, can supply the deficiency of gland secretion and produce a full growth of hair. This discovery may be easily used in the priv- acy of your own home. Within a few weeks you will notice new, vigorous hair beginning to come in and with this growth you can gradually restore r hair te its former bright, healthy color. confident is Dr. Alexander that you can be ved of the embarrassment of baldness and iin the normal hair growth by this method he offers to send a regular $4.00 treatment - only $2.00 to anyone who will write for it. it according to directions, and if at the end month you do not find your hair returning all its former vigor, the treatment does not t a cent. END NO MONEY—just your name and ess to Alexander Laboratories, 812 Gateway tation, Kansas City, Mo., or 812 Terminal, ronto, Canada, and this treatment will be led at once in plain wrapper. Try it accord- to directions and if at the end of a month are not more than satisfied with results, r money will be refunded at once. A big sas City bank guarantees that Dr. Alexander liable and holds $1,000 cash as a guarantee eturn your money if you wish. _Don’t suffer the embarrassment of baldness— give the treatment a trial on this liberal offer. Please Mention Popular Mechanice LOWEST PRICES GUARANTEED TYPEWRITERS Send us only $5.00 a month until the low total price of $66.20 is paid, and the machine is yours. FREE fencrourtyrewriter over ver E A'S Y TRIAL shen: you'can pay 3800's TERMS month and own one. Think of it—Buying a $110.00 Machine for $66.20. Cash price, $61. ™ just a little more than half its original price. ramous LCOMIth movetnes This is the famous L. C. Smith typewriter which has set the world's standard for quality and service for over twenty years. Perfect machines, Standard size, Keyboard of Standard U niversal arrange- ment, 42 Keys, writing 84 characters—universally used in teaching the touch system. The entire line of writing completely visible at all times, has the decimal tabulator, the two color ribbon, with auto- matic reverse, the back spacer, ball bearing type bars, ball bearing carriage action, ball bearing shift action, in fact every late style feature and modern operating convenience Comes to you with everything complete; tools, cover. operating book and instructions nothing extra to buy. You cannot imagine the perfection of this beautiful rebullt Cepeser until you have seen it. We have sold thousands of these perfect late style machines at this bargain price and every one of these thousands of satisfied customers had this beautiful, strictly up-to-date machine on five days’ free trial before deciding to buy it. We will send it to you F. O. B. Chicago for five days’ free tria It will sell itself, but if you are not satisfied that this is the greatest typewriter you ever saw, you can return it at our expense You won't want to return it after you try it, for you cannot equal this wonderful value anywhere. SEND NO MONEY , Order Now— Before They’re Gone When the typewriter arrives deposit with the express agent $6.20 and take the machine for five days’ trial If you are convinced that it is the best typewriter you ever saw keep it and send us $5.00 a@ month until our bargain price of $66.20 is paid If you don't want it, return it to the express agent, receive your $6.20 and return the machine. We will pay the return express charges. This machine is guaranteed just as if you paid $110.00 for it. It is standard. Over half a million people own and use these typewriters and think them the best ever manufactured. The supply at this price Is limited, the price will probably be raised when mext advertisement appears, so don’t delay. Fill in the coupon today—the typewriter will be shipped promptty. There is no red tape. We employ no solicitors—no collectors—no chattel mortgage It is simply understood that we retain title to the machine until full $66.20 is paid. You cannot lose. It is the greatest typewriter opportunity you will ever have. Do net send us one cent. Get the coupon in the mails today—sure. SMITH TYPEWRITER SALES CO. 300. 360 E. Grand | Ave. Chicago. 1. eee SMITH TYPEWRITER SALES CO., 390, 360 €. “Grand fee. Chicago, ti. Ship me the L. C. Smith Model No. 8, F. O. B. Chicago, as described in this advertisement I will pay you $5.00 monthly as rent until the $60.00 balance of the Spectal $46.20 sale price is paid. The title to remain in you until fully paid for It is understood that I have five days in which to examine and try the typewriter If I choose not to keep it [ will carefully repack it and return it to the express agent. It is understood that you give the standard guarantee Name Street Address. . Occupation or Business

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POPULAR MECHANICS ADVERTISING SECTION CAR OWNERS SAVE MON A —~ Make Big Profits/ Cut your own tire bills —and make good money sell- ing National Tirefiller to others. A proven success for 12 years. Eliminates tubes, punctures and blowouts. In- creases tire mileage 30 to 507 and still outwears several casings. Easily inserted; easy riding. Over 300,000 enthu- siastic users. Big sales possi- bilities. Some good territory still open. Driver agents make good profits. Mail cou- pon today for proposition. FOR ALLSIZES ee National Rubber Filler Co., 232 College St., Midlothian, Please send me your agent's proposi- aa tion and full information on Nattonal ‘ Tirefiller. Texas. MAKE $8 TO $32 A DAY We have men making from $8.00 to $32.00 a day in the most agreeable of occupations. You can too. We want men who have good, clean records and who want to increase their present earn- ing power. We have the way if you have the will todoit. You can establish a business of your own. Write today for our offer. THE VITAL MFG. CO. Dept. 26, Chicago and Clark Bidg., CHICAGO, ILL. NEW CORDS 10000 10000 10000 — MILES

Sensational New Cord Tire Sale! Our big volume business enables us to eell brand new Cord tires at lowest prices, Don’t miss this Sale. Every Cord guaranteed first quality and new. Order your sea- son’s supply now and cut your tire cost in two. Thou- sands of steady customers getting —_ Miles full mieage and you, too, can get Tubes “SEND NO MONEY Just send your name and sizes of tires wanted. Don’t wait! Price soon to f° up. Take advantage of this sen- sational tire sale. Shipment C.O.D. Section unwrapped for inspection. r now. Dept. 28 SUPREME TIRE CO., 3234 W. Jackson Bivd., Chicege

|

JOY—ADVENTURE—ROMANCE LINGER NO LONGER Sport Fenders Underslung Overhead Vaives Sport Fenders for Spiective Transmissions Standard Fords You must see *k them out in the City’s White Lights; under the e ountry’s Blue Sky; by the Rippling, Murmuring Waters Get Busy! Buy a F ord and equip it with a Beautiful FORD- SPEED Sport Body and find the road to Happiness. We offer nine smart models to choose from $29.00 up. Full line Racing Specialties to help you go faster. Free Catalog This Month’s Specials a3. 00 ad ‘S38 Force Feed Pum up Oiler 50 Power & Speed | hs vamehatt 19.00 3:1 or 2%:1 Ge 12.50 Price Underslung Fixtures $12 Worm Steering Gear 11.95 Crank Case Motor Arm 6.95 Support 5.00 2.95 SATISFAC wees N Om MONEY BACK guarantee. 50% with order, balance on delivery G.H. FORD SPEED ball POWER EQUIPMENT MFRS., 250 West 54th St.. New York —_— Start in Business {\; For Yourself IF YOU_ ARE INTERESTED IN OWNING YOUR OWN BUSINESS ON A SMALL INVESTMENT Income $600.00 and up monthly Write for our SPECIAL SPRING 5 rg PAYMENT OFFER on DUN- No. 10 or 3B COMPLETE TIRE REPAIR SHOP EQUIP- MENT, including high grade tube plate. Small initial payment brings complete money-making equipment to you. Now 50 § 0.95 30.00 16.95 Discs, set of 8, flat

We teach approved factory methods 2 not necessary——big field open for Pr ne sive men to start in business for themeeive dium, equally as well as with air reap the harvest of the Big Spring and Sum: bags. ill cure twice as many Business tires par Soy than any other three SPECIAL INDUCEMENT ON ALL < cavty Ly 5 ep i; & x. cure Twe aed DE RS RECEIVED WITHIN THE NEXT’ or Three 4 in ‘4 in. either DAYS Write NOW for descriptive { FABRIC « S GORD TIRES. perfect 8 to size, form, width and contour, and Epcelt Speme Ole F.M. DUNCAN COMPANY, pepottnent Cuan sa Duncan No. 10 or No. 3 will cure enc with sand bag as a pressure m

NEW 3c, IRON New development makes ironing easy. Cuts ironing time in half. Seves steps. Costs one cent for 3 hours use. No attachments. Gives clean, quick heat easily regulated. Akectetely Uses kerosene or gasoline. Starts with match without Sells fast. Mrs. Wagner, Ohio sold 24 in Moyer of Pennsylvania made $164 in Work all or spare time We deliver and Sead safe. emoke or smell. few hours spere time. one week. You can do as well, No experience needed. Simply take orders. collect. Commissions paid seme dey you take orders. for catalog and FREE OUTFIT OFFER. Write today. THE AKRON LAMP CO... 36 fron St, Abres.Q.__ Custom-Made Tops Less Than Half Price ASK US TO PROVE IT You can attach them easily. Full instruction Complete tops with beveled plate glass, tacks, f ers and welts, Free delivery 1,000 miles. ears; special prices on Maxwells, Dodges and Chevrolets. De your car. Samples and money-saving Bulletins free. $-C PRODUCTS CO., 758 Nicholas Bidg., Toledo, 0. EVINRU DE iwm from

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lersiung ‘d Fords nder the Waters FORD- We offer ull line Catalog e Now 50 § 0.95 00 16.95 0 2.05 on delivery ulpment lo experi- r Progres eclves and POPULAR MECHANICS ADVERTISING SECTION 165 W. L. DOUGLAS NAME AND PORTRAIT is the best known shoe Trade Mark in the world. It stands for the highest standard of quality, style and workmanship at the Souast possible cost. WL. DOUGLAS shoes are actually demanded year after year by more people any other shoe in the world BECAUSE W. L. Douglas for forty-six years has been making sur- passingly good shoes. The smart styles are the leaders everywhere. When you are looking for the best shoes for your money examine W. L. Douglas $7.00 and $8.00 shoes. my. F, are a ae good value for the price. WEAR W. L. SAVE MONEY. 5565758. 89 SHOES 22 NO MATTER WHERE YOU LIVE shoe dealers can supply you with W. L. Douglas shoes. If not convenient to call at one of our 116 stores in the large cities, ask your shoe dealer for W.L. Douglas shoes. Protection against unreason- able profits is guaranteed by the name and price stamped on the sole of every pair before the shoes leave the factory. Refuse substitutes. The prices are the same everywhere. IF NOT FOR SALE IN YOUR VICINITY i & $5.00 * WRITE FOR CATALOG. We BOYS SHOES TO MERCHANTS: If no dealer in your town handles W. L. Douslas shoes, serite today for exclusive rights to handle this at —— k-selling, turn-over line. . L. Bougtas ion - 128 Spark Street, Brockton, Mass. 1d & AUTO rae teats eee BATTERS CHARGED ONLY a eee =| @ TTBS aerien I came tie At : vernight, Disss- PLY _ et, Snap

GUARANTEED 10,000 MILES IN WRITING! LOOK AT THESE PRICES! Logk at the section ! Hed’ ‘a the only 8-ply SIZE TIRE tire at so low a price. ™ mileage built into Crea corse q will get 10,000 to 000 miles out of them on any kind of roads! | < NoMoney No Deposit] =’ Sent to you | Ser Free P+ examina qnew Written Gold « guarantee w

ve °; ie i

35x5 J : '. t ‘ Pay on delivery plus express or parce! postace. a AMERICAN TIRE CO. $25) G2" SS 4 -- a

Book of Newest Styles just out. Wonner men’s, children's clothing on credit and at ha , and rati; ntal prices, less than cash prices everywhere. ‘ 136 pp 3s 6x9. fashions ; best materials. Open a charge account with us. Bi and save money! Dress in newest styles. Send for Style Book absolut 200 E_Osterie $t, Chicago J | FREE today! Elmer Richards Co., Dept. A177, W. 35th Street, Chicago What's Wrong With This J ob? MEN 18 to 45 BECOME CITY MAIL CARRIERS City residence unnecessary. gs $1,400 FIRST YEAR 0°") yaramirttrsere. i: book. (2) Tell me how to get a posi- S 00 to $1800 Raise Yearly to $1800 Year Ps tion as Mail Carrier at $1400 to $ a year. (3) Send list of other U. 5. Gov- Steady work. Paid vacation. Com- oo ernment Jobs obtainable mon education sufficient. Pull or experience unnecessary. a Mail Coupon—Today Sure wo

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POPULAR MECHANICS ADVERTISING SECTION chestra of Chi- cago, one of the famous graph record- ing orches- tras, uses Conn instru- ments exclu- sively re: Ss Prefer CONNS HE famous broadcasting orchestras and art- ists, just as the leaders in every other instru- mental field, choose Conn instruments. The purity and brilliance of the distinctive Conn tone is par- ticularly adapted for radiophone transmission. These artists know the superiority of Conn in- struments, not only in tone, but in reliability of action, ease of blowing, and flexibility which en- ables them to play the most difficult music with comparative ease. When you tune to your favorite statior. and there comes a melody which fairly lifts you up and makes you want to dance, it is practically certain to be Conn music, played by a Conn equipped orchestra. You should know more about the exclusive processes and features which make Conn instruments the finest in the world. Send a post card for complete information and de- tails of FREE TRIAL, EASY PAYMENT plan on any instrument for band and orchestra. Highest Honors at World Expositions Dealers and agents throughout the country Factory branches in many large cities Cc. G. CONN, Ltd. 631 Conn Bldg. Elkhart, Indiana ORLD" LARGEST MANUFACTURERS OF HIGH GRADE BAND AND ORCHESTRA INSTRUMENTS IVATE YOUR ICAL BUMP TRANSFORMERS (Radio and Audio Frequency) Give Wonder- nant raenrcy ful Results 4 When Used In “Neutrodyne” and “Reflex” Circuits For best results with the “Neutrodyne” & “Reflex” Circuits, use “All-Ameri- can” radio frequency Am- pliying Transformers. Type R-10 and Type R-13, Ratio 10 to 1 Audio Fre- quency Transformers. Ask your dealer for FREE 2 AUDIO FREQUENCY American’’ Hand Book of Radio Hookups. If he cannot supply you R-12 (Ratio 3 to 1) $4.50 t di R-21 (RatioStoi) 4.75 write us, 7 ~-4} on cent stamp B-13 (Ratio 10 to 1) 4.75 RAvLAND MrG.Co 200 No. Jefferson St., Chicago, II) — The Model D — popular Tor- pedo type body equipped with a complete Fiat style Radiator. The body is sturdy and guar- anteed to stand up under any kind of strain (generally used for professional racing). | Gas tank in tail end, door on right side with inside lever lock | CHAMPION RACING BODY CO., 7-9 East 28th St., CHICAGO, ILL. | “The Torpedo” s— i, | ELV NEW of our customers are getting 12,000 miles out of these tires, you too ean get this mileage These tires are firsts. Send No Money Write us and tell us the size of your tires and how many you want. Shipped C. O. D. with section un wrapped for inspection, If not satisfied return tire unused and money will be cheerfully refunded. Dept. 118 STARR & STARR chicago, 111.

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POPULAR MECHANICS ADVERTISING SECTION SHOP MANUALS for the AUTOMOBILE ELECTRIC SERVICE STATION Automobile ustment, of both battery and magneto ignition equipment now in use. Includes eighty-three diagrams of internal and external connections and more than one hundred illus- of construction and tions of operation are given by description and expla- nation of equipment in actual service. 439 4%" by 6%", bound in fiexibie leatherette. Price $2.00 Postpaid Automobile Battery Care and Repair Practical repair methods from the time of openi the cells until the final reassembling. Explains methods of test- ing with hydrometer, voltmeter, ammeter, discharge set and cadmium stick; showing symptoms by which each kind of trouble can be recognized. Includes rules for ¢ ng new. used and repaired batteries; also instructions for the use of all types of charging equipment. \mong the tables are those am effect of temperature, and rate on capacity; capacity for starting ighting: discharge rates voltage drop during tests; arging rates determined by bat size, heating, time vailable and line rate; — secured by various proportions acid and water and grav used in repair work. 5 pages, dul by 6% ~ Too illustrations, bound in flex- e leatherette. Price $2.00 Postpaid Starting and Lighting Troubles, Remedies and Repairs ne hundred and five special diagrams show the internal i, also the connections between all the units of each type ake of electrical equipment from 1912 to the present yposite each diagram is a Gescription including the nal amperage and voltage, the method of regulation, the e of cut-out and their adjustments. mible location charts are based on the action of lamps starter without the use of testing instruments. ver two hundred pages of instructions for testing and ting faults in any part of the starting and lighting equip- t. Includes sixty-four diagrams showing tests and repairs, sixty illustrations of operating principles. ) pages, 444” by 6%”, bound in flexible leatherette. Price $3.00 Postpaid Automobile Starting and Lighting ves an elementary workti wledge of the construction an on of each part of all types of rting and lighting systems. n addition to the subjects ntioned in the list of contents, book gives a brief description the systems that have been i together wth internal rams of dynamor, motors, -outs and current regulators, t also includes definitions of two hundred and twenty-six words 1 terms ape in automobile e trical work ISS pages, 414” by 6%(’", bound flexible leatheret tte. Price $2.00 Postpaid POPULAR MECHANICS BOOK DEPT. 200 E. Ontario St., CHICAGO Tailoring Salesmen The greatest—the most sensational—the steadiest money-making line in the field. SELL GREAT WESTERN CLOTHES — the equal of $50.00 store values at $33.65, suit or overcoat, one price, made to measure, ali wool, money back guarantee We Pay You Salary and Commissions We put you on our regular pay roll the minute you connect up with us and we send you a check every week. In addition you get your regular profit on every suit you sell, and you get this money in advance. McBurnie made $392.50 last month, Landers seldom goes under $100.00 a week. No line in the country offers the wonderful money making opportu nity this does. Read the following exclusive features and you'll understand why the GREAT WESTERN line has no equal as an order getter We pay salesmen weekly salary and Commis- sions in advance. We prepay express or parcel post charges to customer. No extra charges—everything free—nothing added to our one price. All Wool fabrics, all wool linings, workmanship. Handsomest salesman’s sample case and out- fit ever gotten out. Satisfaction guaranteed—money cheerfully refunded any time. Tailoring salesmen—sénd the coupon t day for complete information. Other live selling men write u We'll train you and show you how to make big money se ling one of America’s oldest and best known brands of clothes. Send no money —complete sample equipment furnished FREE. Mail the coupon NOW Great Western Tailoring Co. The Pioneer Line Est. 30 Years Chicago, Ii. high grade Great Western Tailoring Co., 837-841 W. Jackson Bivd., Chicago, IIL. Please send me fu'l details of your salary and commission propo- sition for sa‘esman and complete information on your line NAME ADDRESS TOWN

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POPULAR MECHANICS ADVERTISING SECTION

Your COWAN HAIR CUTTER Own Most Useful Device on Earth

Over 30,000Businessand Professional Men, Mothers and Nurses save Time, Money and Worry over Wasted Hours spent in barber shops. S 9. 0 0: The ‘‘Cowan’’ Combination HAIR CUTTER-SAFETY RAZOR makes them inde Adjustable for long, short, nals r-effect or pompadeur, No practice needed. yr silky, kinky hair eversible for wits had. Two- way OR —safe for LA DIES new hollow spots and behind ears ~e arbe re and Mothers find it convenient 5 PLA ), complete with two extra blades gates months’ service. 6 Extra Blades, Be. DEALERS WRITE. State Agents est. 72, Admiral and McGee ‘St. KANSAS CITY, MC., U.S.A. +~% plus 10c postage. J.

‘WEAR IT FOR 7 DAYS FREE These beautiful RAJAH diamonds have all the living fire and dazzling beauty of the genuine blue white diamond and are the result of years of scientific and chemical research. They stand the test of direce comparison. YOU CAN BE THE JUDGE. Wear one of these rings on the same finger with a genuine diamond seven days. If you or your friends can tell the difference, send it back and we will refund your money. YOU TAKE NO CHANCES, SPECIAL INTRODUCTORY OFFER for Short Time Only ya a pond hind ee white platinum $3. 35 white “pi latinum 4, 65 No. 9 finish s lat est P atterns and are exact reproductions of h ore eC neonditional 20-year guarantee. Handsome | ith each ring. SEND NO MONEY : Just aes da = (pe nam yy drees, number of lip of paper Sitting ond to enc ar t Ve wh nawrf ab< not th — it the biggest bargain ever nd it back wr deposit together with ed SEND” TODAY ill be immediately refur *“A. ROTHCHILD CO., 608 So. 14th St., Omaha, Neb. mounting— “ men's gypsy reg. price $9.30) now Mountings are beautifully desig mounting - ned fror ys und fi vl receive ri wn

ndent, RM men. right or left handed persons. t Gussde

CUT YOUR OWN HAIR in ten minutes. ny style finished like YOU want. vi f No SPLIT hairs TOO — smoothest you ever corners for working under arms, over bump Lifetime durability. Genuine SILV VER LERS or direct by mail upon receipt of price Ty U. S. and Provinces of Can Manutactured and sold in Canada b Cowan Hair Cutter — Co., 7 Canada, "utd. Dept. 72, 141 Ave ‘Man.

22 ft. x 26 ft. You can buy all the material for a complete home direct from the manufacturer and save four profits on the lumber millwork, hardware and labor. Price quoted includes lumber cut to fit, windows, doors, woodwork, glass, paints, | ware, nails, lath, roofing, and complete drawings and instruct Highest grade lumber for all interior woodwork, siding and finish. Many other designs. Send today for Free Aladdin Catalog No. 2545 AY CITY The ALADDIN Co., fituidl Witmington, North Carolina; Portiand, Oregon; Toronto, Ontario ar

a month in RADIO Well-known radio manufacturer now has

$ [ 0 00 openings for state, district and county rep- resentatives. $1000.00 a month easily earned by good men. Finest, popular priced radio Write at once for details. CHERINGTON MFG. CO. Dept. 16 WAUKEGAN, ILLINOIS

Be 193 New OLIVER SPEEDSTER Send for 1923 Oliver Catalog Showing New Standard three bank Keyboard THE OLIVER TYPEWRITER CO., Chicago |

THIS PALATIAL Florida Home can be purchased at a very reascnable pr It is the finest estate in a community 30,000 situated amid 5 acres of orange, grapé fruit, sweet bay, palmetto and a large variety of semi-tropical trees and foliage. A water front of 400 feet, with entrance from Boulevard, affording every modern venience. ouse recently completed a never occupied. Has every modern provement, large sun parlors, sleep porches and 8 bath rooms. Inexhaust supply of soft water, steam heat, high, li; basement under entire house. Surf bathing all winter within 5 minutes walk. a For full details, photographs and price address the owner, H. H. WINDSOR, 200 E. Ontario St., CHICAGO, IL! in

Tm MT

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POPULAR MECHANICS ADVERTISING SECTION

; me direct p turmber, tludes a nts, hard structions |CHIGAN itarioe 10,000 Practical Recipes HENLEY’S Twentieth Century Book of Recipes, Formulas and Processes Edited by GARDNER D. HISCOX, M. E. Contains over 10,000 Selected cientific, Chemical, Techno- } gical and Practical Recipes and Processes, po Hundreds of So-Called Secrets for Every Soden This book of 800 pages is the most complete Book of Rec- ipes ever published, giving — mers of recipes for the manufacture of valuable articles for every-day use. Hints, Helps, Practical Ideas and Secret Processes are within its pages. It covers every branch of the useful arts and tells thousands of ways of making money and is ast the book everyone should have at his command. A book to which you may turn with ee that you =_ find what you are looking for. A mine of inf to-date in every respect. Contains an immense —+ a f formulas that everyone ought to > have that are not foun’ in any other w Price $4.00 Cloth Binding Popular Mechanics Book Dept. 200 E. Ontario St., Chicago

‘To the man who loves to smoke a pipe —— HE ordinary pipe has certain disadvantages. At last, and for the first time in the history of pipe smoking, there is being offered to the pipe lover a pipe which is not only wonderfully sweet, cool and delight- ful to smoke but which absolutely overcomes al] disadvantages

STANDARD ELECTRIC SERVICE FOR EVERY CAR WELLS’ AUTO ELECTRICIANS’ HANDBOOK Gives the exact performance, o. construction, the method of testing, and ‘explains all adjustments, Bet- tings and peculiarities of ©; tion. Blueprint internal wiring diagrams for each generator, motor, cut-out and regulator—drawn just as the machine is built. Covers 1324 models of 270 Gifferent makes of cars from 1911 to date, showing more 1000 changes of equipment. Loose-leaf with forty pages of index. PRICE $12.50 PREPAID ») WELLS’ AUTOMOTIVE WIRING MANUAL Real car wiring diagrams for Pp work—showing the parts and wires the way they are placed on the cars themselves. All in big, clear blueprint @lagrams—from 1912 to Gate. Every diagram correct, the last word in usefulness. The sixth consecutive year of issue—your Sesrenece of con- tinued service in iy up to date. Loose-leaf RICE $12.50 PREPAID WELLS’ AUTO ELECTRICIANS’ CYCLOPEDIA combining both of above in loose-leaf binder. PRICE $22.50 POPULAR MECHANICS BOOK DEPT. ME. Ontarie St, CHICAGO

The Sport-Briar has created a sensation in Europe, the home of pipe smokers. While it has been on the American market only afew weeks we have received so many orders that we are nearly oversold. It is now available to you! Some of the reasons a SPORT- BRIAR should have a place in the rack of every pipe smoker: CaN BE THOROUGHLY CLEANED IN 30 SECON D&S t high wind as indoors © scatter of aa r spark, thes and furniture as the ordinary m the pocket ted fully lighted’ to8 sen Fr h briar Dranse Me- Smokes any kind of tobe Ite ft atented n at r (removable {< leans oven SPOR BRIAN om kere the pur cootest » ke in the work Money- Back Guarantee There are always a certain number of **Doubting Thomases"’ in the world lo them we say—lIf, after you’ ve tried 1 SPORT-BRIAR, you wish to returr it, we will return your money as fast as Uncle Sam can take it to you. You need state no reasons why. We know, wever, that ll be delighted th your purchase Every ody is Mau the « Can Easily Make $75 to $100 Every Week Write for SPECIAL AGENTS’ PROPOSITION The best acents in the country are making arranzements with us. Why’ Because the SPORT- BRIAR not only causes them to clean up amazing profite every day but is such a fast seller and remarkab! repeater that the work of selling is very ea Pipe smokers take to the SPOR' BRIAR asa violin lover would take to a Stradivarius. Better get started before someone else is given your territ Fi the coupen | ne Ww wi le you'r r thinking

Actu Size THE SPORT BRIAR PIPE CO., SINGER BLDG., NEW YORK Gentlemen: Send mea Sport-Briar Pipe, for which I agree to pay $5 to the postman who delivers it. Name Address If you are likely to be out when the postman calls, you can save time by sending us the money with this coupon. Money back if not satisfied.

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POPULAR MECHANICS ADVERTISING SECTION

atic New Easy Way to Make Money Fast | peti ged me Make $75.00 to $150.00 A Week. Just Place Card on Dealer's ) ameghtty Dork, Piney, All Time or Spare Time Counter, Collect Once A Week —— a TOOTHPERL amazes nation. Makes yel- All you have to do is place a card (con. es Polished Ivory. low, discolored, or tobacco-stained teeth as taining 13 bottles) on the counter of Cente ; white as snow. Eliminates tartar. Just a drug, cigar and candy stores. Card —— _ 25 tm sane : clear liquid, absolutely harmless, Teeth shine brings in $3.25. Dealer keeps $1.25. Pays ; siaeie m wants TOOTHPERL. Recommend it to their YOU $2.00. You pay us $1.00, making $1.00 : “ friends, Not an ordinary tooth paste or pow- Pet Card profit for yourself. Man ve stores der. It’s anew, scientific discovery. Nothing = first card in two hours. Chicago clse like it. Sells like hot-cakes. druggists call it fastest seller in history. 45,000 Bottles Toothperl Sold in ta Cao Blo Wie Tet fh Months By Inexperienced Man Send $1.00 for Sample Card sno attowee toe Dek, Ones Desi rae Tate mare | You don’t need selling experience. You can make Big Money Finesse on & druggist’s count-| an an ne so arapl regey en Fe petaon right from the start. All you have to do is place the cards er. Watch it for a day or two. | = and collect your profits. Territory going fast. Write today See how fast TOC )THPERL | for complete details. Better still, mail $1.00 for sample sells, Then grab your terri- card, Don't delay. tory. Sy = » return | card and we'll refund your| | MARCH propucts COMPANY dollar. Order several cards now «| _ = | _Dept. is 0 W. Lake St., CHICAGO, ILL. you want to get started quick.

PILLIOD Tool Cases Excel

, Put this is Parksi in your shop

Parks Why spend time on hand Machinists, Tool Makers and Car z penters find them most satisfactory **4-in-1”’ work? Why not do every job in construction, appearance, service Price on this husky, convenient, and price. Immediate shipment fast-working Parks machine? |] | “4 es ae ioe aoe Make your shop agg a Dept. 1 Swanton, Ohio and a money-maker. Parks “Four-in-One”’ is a cir- cular rip and cross-cut saw, band saw, jointer and borer, all in one. Angle-steel frame, channel-steel top, fully equipped and guaranteed 10 years.

Send for circular and _your skin Parks catalog showing - 6 A is injured lathes, saw-rigs, band saws mY igs olsinae. T = a and combination wood- soled "cloth { b Feet workers for any shop \ Court Plaster quickly pro- requirements, tects any small break with a flexible, clean, washable cove ring. Send 106 for a THE PARKS BALL BEARING MACHINE CO. ‘ — }— “S Jibeasees ana packin 1500-1540 Knowlton St. Cincinnati, Ohio Carpenter ChemicalCo. Me GasI|n Any Stove | | ia Cook in a | | | | r ity f: P The Instant-Gas Makes her rrp! reatpegegiy : Oil Burner —— , * ooking | WOODWORKING | MACHINE _—s a pleasure. “Gives . - ] everywhere, in any stove or range. Ev- erybody knows gas =} ) 4é Oo ve ONLY Y means cleaner. LYON BODIES ote For Fords, Chevrolets and Dodges chen. Saves hours of time and loads of dirt. Start — our stove with a turn of the wrist, turn high or io iow tosuit and stop — ——— > i. erent models for differen Fits Any Coal stoves. Just set it in the fire- or Wood Sfove pox. Put in or taken ovt in ten minutes. No damage to stove. Simple, safe, odor- less, lasts a ~~ ae back guarantee, aw e Instant-gasOil Burner make 30-Day Trial its own gas from eoal oil (kero- sene) at one-sixth the cost of city gas. Much cheaper than coal or wood. Because it can be regulated the Instant-gas Oil Burner Cooks and Bakes Bet- SEND NOW & ter than coal or wood in the same stove. No coal or wood to carry, no ashes, no ren yn | . or starting of fires jrea For Our 1923 ‘“‘Book of Bargains”’ woman-saver in the world. USER AGENTS Write for 30-day trial offer and Containing a full line of bodies and accessories at needed in every lo- | free book telling how Uncle excéptionally low prices. Buy direct from the factory. cality. to whom we | Sam burns oil. AUTO TIRE SALES CO., Dept. P8 Body our $60;a weck onics | INTERNATIONAL HEATING CO. 1346 S. Michigan Ave. CHICAGO Division open, giving gxclu- | a4g ©. 14th St, Ot. Loule,te. Canadian Factory: 200 Notre Dame East, Montreal, Canada

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POPULAR MECHANICS ADVERTISING. SECTION Tobacco Is Hurting You Look at the facts square in the face, Mr. Tobacco User. You may think tobacco is not hurting you. ot ras 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. Slow, yes—but sure. Tobacco is lowering your efficiency. It | When your hands begin to tremble— are P : and your appetite begins to fail— slows a man down. Makes it harder for you and your heart seems to “skip a beat” now and then— to concentrate your mind on your work. You and slight exertion makes you short of breath— haven’t near the amount of ‘ ‘pep’”’ and energy then you have a right to suspect that . y ave tte . . a. : oo TOBACCO is getting the upper hand. you W ould hav e if you Stoppe d using It. T he res Any well-informed doctor will tell you that these are many a man twice as old as you in years who's twice as ; only a few of many symptoms of tobacco poisoning. young in energy, simply because he lets tobacco alone. And YOU know that the use of tobacco in any form Some day you will realize to what an alarming extent is an expensive, utterly useless habit. You know you tobacco has undermined your system, ought to quit. Tobacco Habit Banished Let Us Help You It dosen’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 avery fewdays. Not the slightest shock to the nervous system. Your tobacco craving will usually begin to decrease after the very first dose—there’s no long waiting for results. 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. It helps to quiet the nerves and make you feel better im every way. Results G t Actagis telat wilt convince you. Ou egai-binding, UAPanlee” yor oye, seen binding. NEWELL PHARMACAL CO. goes with each full treatment. We will refund every cent you pay for the 300 i treatment if after taking it according to the easy-to-follow directions, it Dept. St. Louie, Me ild fail to banish the tobacco habit completely. Please send, without obligating me in any way Let us send you our free booklet on your free booklet revarding the tobacco habit anc SEND Coupon for the deadly effects of tobacco, to- proof that Tobacco Redeemer wil! positively free me ether with testimonial letters from > - - . j Free Proof coats ellever the country telling — from the tobacco habitor my money will be refunded they have been absolutely freed from the tobacco habit by this simple home treatment. You could not ask for stronger proof that Tobacco Redeemer will free you from the habit than the evidence we will gladly | send on request. Just mail the coupon—or a postal wil! do NEWELL PHARMACAL CO. a Dept. St. Louis, Mo. . — |

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POPULAR MECHANICS ADVERTISING SECTION YOUR SUMMER HOME 13th Edition Wherever You Want to Make It! A New AND GREATER DyYKE’s AUTOMOBILE ENCYCLOPEDIA Entirely rewritten—rearranged and new illustrations from beginning toend. Mr. Dyke devoted almost — of constant application to rewriting this | Je are confident that you willagree with us that it the best book in the world today on the automobile, truck and tractor. A PRACTICAL BOOK ON THE AUTOMOBILE FOR EVERYBODY WILL AMETTE AUTO TENTS Over —_ Pages. Over 4,100 Illustrations ver 14 Lines of Index (Scientifically constructed) sos : This book teaches the underlying fundamental princip} 2 windows, 2 shoe pockets, sod cloth’all around. Made of each and every part of an automobile—mechani. al = from U.S. government O. D. shelter duck. Packed in electrical is aumpliied meneee, ———- is why the larg- _ auto schools are using it as @ textbook. Auto owners, small canvas bag—no poles required. é students and repair men say that it contains the ereatest Width Depth Height Postpaid array of automobile facts ever published in one volume. This book will teach you to be- 7 7 7 $22 -0O come an expert automobile repair- dalso an electrical expert. 9 rf 7 $24.00 You will understand fundamentai P OYKE: agg a. § AiTONORAE GOS ting, usting and repairing. ff, ) APPELL’S a you were to Cee separate wlP §=© ENCYCLOPEDIA . OOKS On the subjects covere he hkl | SEVE: 1" South African Water Bag lot would cost about $21.00. The [Ml os @ || Two gallon size—keeps water cool for price of Dyke's book is hours—Made from flax duck. Cloth Binding, $6. $1.65 postpaid. Flexible American > Postpaid Morocco, $7.50 At your dealers or ‘Complete table of contents mailed Hirsch-Weis Mfg. Co. Popular Mechanics Book Dept. 205 BURNSIDE STREET PORTLAND, OREGON 200 E. Ontario St,, Chicago [_————4 Fifty Cents &—— A New Book on Concrete For the Home, || popuLaR MECHANICS Farm and Factory Ts Describing 173 Ways of Using Concrete. Full directions for doing CONGRIE |e i] these things yourself with ordinary tools — 138 Illustrations. HANDBOOK No! se CONCRETE f= Mechanics’ Number 1 Shows you how to make such things as stood that while this book contains much that is of interest to the Concrete Fence Posts onthe Farm professional concrete worker, the clear A T the outset it should be under- Soaup ony Mixer directions and great variety of work cov- Describing 173 Ways of Using Concre oncrete Forge, cred make it especially suited to the needs ceeeeaeearece Comet Boat Landings and of the ean. senmadbatieatnany teat tapthectet Garden Seats of Concrete i ESS BMoldofor htabine Gone nne Bike. The farmer 2g Memon to make and set POPULAR MECHANICS PRESS Watering-Troughs in Concrete some concrete ce posts or make a CHICAGG Forms for Concrete Gate Posts watering trough for his stock; the shop Rural Mail Box Post man who wants a concrete forge, or the (+ Concrete Garden Furniture . ; (5 articles) home lover who wishes to make some Concrete Tile practical or ornamental article of concrete, will find that this handbook tells hi Concrete Sidewalk Flaggin; $\ ne how to proceed, so that he may have confidence as to the outcome of hi: Concrete Block Milk House No wading through a lot of technical terms in order to pick out the bit « Conkeary Drinking Fountain of formation needed; just step-by-step instruction ‘‘written so you can understan mcrete Concrete Curbs and Gutter. ° POST- Send in your order at once and get ready to do that part Faultless Concrete Sidewalks Price 50c PAID piece of work long deferred for want of the “know | And icall other pe: pry Me Moo POPULAR MECHANICS BOOK DEPARTMENT (THOROUGHLY INDEXED) 200 East Ontario Street, CHICAGO —

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POPULAR MECHANICS ADVERTISING SECTION Make Your Bike a Mororcycle The Famous SHAW 2} H. P. MOTOR ATTACHMENT Why envy the fellow who rides an expensive heavy weight motorcycle? For a fraction of his investment you can easily convert your bike into a sturdy, lightweight, dependable motorbicycle. With a 214 horsepower Shaw Motor on your bike you can travel with any of them—up the steepest hills, over sandy or muddy roads, and on long tours. You can enjoy the great out of doors and get the most out of life at the least cost. The powerful Shaw Motor gives a speed of 4 to 40 miles an hour. 90 to 125 miles on a gallon of gasoline and 1200 to 1800 miles on a gallon of oil. Cheaper than walking. Sportier than foot pedaling. Attach in 30 Minutes — No Special Tools FITS ANY MAKE BICYCLE An ordinary wrench or| The Shaw Motor Attach- The Com lete screw driver are all you need | ment fits any standard bi- p to attach the Shaw Motor |eve le frame. It transforms Shaw Motorbicycle ting or boring. Nochanging |Your bike both in appear- —.- -4 Seana 30 anging | ance and performance. The If you have no bike and desire a complete oF Making over. minutes | erfect balance of th , : : after receiving your Shaw |! Se Canes Cs Cae Cages Shaw Motorbicycle here it is. A lightweight, 2 t fill y . avoids vibration so common powerful, motorbicycle, complete in every de- you can be up with gas and in most motors. Simple, de aa All latest oil and gin the greatest dabl 4 oa P ise [023 imererve- . sport you've ever had.|pendable and safe at all ee 2% horse é ; PY 2 ae Simple directions are fur- — The ~ Any low “a “a ~ mee. The Shaw clamps on — you wi : fo y hewn ficiency. \ SS ike frame making for easy | the money. mn tact you Siew tam ye : control, better balance and |soon pay for it in carfare Now. Ges - eC] greater power. and time saved. 7 . Take Advantage of New Low Prices The 1923 Shaw Motor is the best model we have ever etter power built. And we have made tremendous price reductions ‘tractor at a é You can now own a Shaw Motor Attachment at less ost. Just the TP oO - cost than ever before. You can join the other thousands for truc k gard- of happy, enthusiastic Shaw users. Do it now. small farms, es- . /2 etc. Equipped al WRITE TODAY famous Shaw The summer season is at hand. Write Get full par- today for free complete descriptive liter- Use coupon. ature and new low prices on Shaw Motor USE THE Attachment, Complete Shaw Motorcycle, cou PO N New Shaw Cycle Car or New Shaw Garden Clip the coupon Tractor Use Coupon. Check informa melnw ft te for tion desired : oR aie real automobile your convenience you can easily SHAW MFG, Co. Che« k item on i yourself. Carries 2 passengers any- which you desire f Power supplied by famous 2% Dept. 102, GALESBURG, KANS. free information Shaw Motor. We supply every: Tainted din. Yano. asin ARRaeeR oraie Check Coupon for Sree particutase. SHAW MF6G. CO., Dept. 102, GALESBURG, KANS. plete Book of easy to follow plans >. Please send Please send me full particulars and new low prices on articles | I have checked below, all without obligating me Shaw Motor Attachment. Complete Shaw Motorbicycle. | ] New Shaw Cycle Car. y © New Shaw Garden Tractor.

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POPULAR MECHANICS ADVERTISING SECTION You want to be well and keep well—send for the book “Health.”’ It tells you how the healing pow- ers of electricity can be safely used to help you. Rheumatism, neuralgia, neu- ritis and sciatica and over one hundred other diseases of the nerves, blood and tissues have been successfully treated. Pay only $2.00 deposit to show your good falth, and select the ring you like best. We will d. or fed" oe, DEALINGS "CONFIDENTISLS AE Sou | | A letter or post card brings the RETURN It, WITHIN 30 DAYS, WE, WILE RETURN book. Write tod for 10 months. Total price only $45.00 for either ring. oor, rite today. FORMER CASH PRICE WAS $75.00 R nt Piette 6 The tiful, j m r Giamond is set'in a popular 18 Ie Karat solid wh —~y idring. and enu ire ec ric Oo pany equals any $75.00 ring. The cluster ring has seven per- fectly cut, brilliant, blue-white genuine diamonds, set in 614 Newberry’ Building solid ‘plstinum. The cluster is fis. carat size, and looks “WRITE FOR BIG CATALOG Neéie | | DETROIT = = =— MICHIGAN Ut brings a large jewelry store right into your am STERLING DIAMOND & WATCH CO. 63 PARK ROW, Dept. 676, NEW YORK (Est. 1879) The Dragon One of the many beautiful models we manufacture for Fords and Chevrolets. Mr. Dealer, pay only one profit, buy direct from us, the actual manufacturers of these bodies, and save | viere victor AUTO BODY CO., 1422 Blue Island Ave., Chicago, Ill. —_————_— ing way to lace be ts is wit! Our BUREAU OF INFORMATION will answer all ques- — emp eek by: tions regarding articles in this magazine. Address Popular ot. Easy to apply Mechanics Magazine, Spieage. —— lacing $3. 50 or. tot treet A 4 »x of lacing as she ——— ae " pontoaid $6. Ey YOUR OWN » Six Machines = = Combines bench saw, sander, drill, grinder, polishe” and buffer for working in wooed aad soft meta's - Jtationery ¥ Boice Pony Bench Machine - name, monogram, - Circulars —a precision machine eapecially adapted t accurate work. Handles 4” and 5” grinding ) ] , le b ° saws, 6” and 8” sand dise and %&” chuck. Saw Si or In man - Blueprints Mountable = se 2 base with motor. i ° ° Weight 31 Ibs. op 10” x 12” easily removed raised le lers - » construction. Easily driven by \4 or '4 H m t _ P, Especially suit for ‘Private SI -J an a0 oratories, Shipping Depts., Print« Comeateal- mu mprints oe ; and Pattern Makers, Furni' " om. men, ete. Machine sold with a money Write for complete description a Our line ineludes 4” bench } of the Empress Embosser —_ . e en THE FULNAME Co Bearing motors a\es™ ae ™ no be ‘sir mist dy device Southern Railway Bldg. moter drives ee for descrip* CINCINNATI, OHI! | * rices on Bo Meokine and the ab« Bench Machines W. B. &J. E. BOICE, Dept. P.M. 6, Toledo, 0-

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One er, polisher oft metals achine POPULAR MECHANICS ADVERTISING SECTION Car Owners Wanted! —to show and sell this greatest improvement in Inner Tubes since autos were invented. Air Gauge on every tube built in as part of the valve stem tells at a glance actual air pressure all the time, Just look through the unbreakable transparent valve cover and see pressure instantly. No more guessing. No more bothering with separate air gauge. No more soiling of hands and fussing with dirty valve covers and caps to find out if tires need more air. Car owners buy on sight, no matter what car they drive or what casings they use. Our “direct-from- factory” salesmen are cleaning up with this great new invention. Many make $5 an hour—right from the first. Absolutely no competition. All basic patents owned and controlled by this company. No capital required to start. Previous selling experience not necessary. You can sell— AiIR-GAGE «:.,InnerTubes —to almost every car owner because they cost no more than others of equal quality. Made of best quality live red rubber, built up on the multiple ply laminated process. Tough, live, durable. Every tube guaranteed in writing. Read how we help you make a success. —We pay the largest commissions offered by any tire maker. —We actually make and fully guarantee every Tube and Tire we sell. —We give exclusive agency in territory you select and credit you with all orders received from same. s —We ship all orders to our men all charges prepaid. —We advertise Air-Gage Tubes in Magazines reaching 20,000,000 readers. Big Free Book Explains All Send coupon or write today for big new illustrated book. Tells how to sell Air-Gage Tubes, How to become a successful Paul Salesman. How to start in a big paying busi- ness of your own without capital, how to be the one to nail down this tube and tire busi- ness in your territory, howto get the special Demonstrating Outfit. How to get your own Tiresand Tubes at factory prices. If you want to get all the facts about this wonderful new invention and the “Paul Plan” of distributing through exclusive factory repre- sentatives, send the coupon today. We refer you to Dun’s, Bradstreet’s or any Bank in North Carolina. THE PAUL RUBBER CO., nept.2s. Salisbury, N.C.

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176

A BETTER Engine For Less Money Only Engine Sold on Lifetime uar- antee THE NEW WITTE Throttling Governor Easy to install—Easy to han- dle—Gives more power than rating—Increase or decrease speed at will—Run on cheap fuel, Gasoline, Kerosene, Dis- tillate or Alcohol — Steady speed on variableload—Starts without cranking—So simple a boy can understand it. A to any power job anywhere Comes complete — Battery ls 6.2 equipped. BOSCH Magneto — Pu O 0 at small cost extra. All other sizes and styles at propor- tionate low prices. At WRITE FOR CATALOG 095 — WITTE ENGINE WORKS write Nearest Address) 1748 md Avenue, - - - = «= = KAN

“gm H-P.— Puls 3 | 0 = sabe Kt¥ _ aS 0 ae Sg 3* 69% Pa a

Oakia: 1748 Empire Building, 1748 Fremont Street,

DEAF Hear After Using Radio, Amazing Discovery Hundreds of people heretofore DEAF ARE HEARING AFTER USING RADIO. This new principle has been embodied in a self-contained device, the Syncro-Vibrator, which is giving amazing results in restoring hearing. No radio needed. Full details on request. No] obligation. Address Yorke Burgess, Consulting Electrical Engineer, 744 East 42nd St., Chicago, Il.

POPULAR MECHANICS ADVERTISING SECTION Build Your Own PHONOGRAPH IT’S EASY WITH OUR HELP Atew hours’ interesting work saves over alf and gives you a machine to suit your ideas. We furnish motors, tone arms, case material, blue prints and full instructions. Plays any record. Make fine profit building phonographs for your friends. Write today for our Blue print offer. F R E E four RADIO SUPPLIE Choraleon Phonograph & “ely a 623 ist St., Elkhart, ind.

STEP ON HER! Zingo! 20 miles per | using our 1923 mot Prices reduced on all p Anybody car Sembie this « Send 25c ft lans, includ nstructions price list. SYPHER MANUFACTURING Company 146 Sypher Bidg. TOLEDO, OHIO

Easily possible with Tire Surgery.?Tire fA prices on upward trend. Car owners again flocking to re- pair stations. We have wonderful propo- sition for ambitious men.Oldham made $2200 in 4 months. Evans average $100 week. Several choice lo- eations available. Write quick for details. May be opportunity you seek. Write and find out. We will place whole proposition before you within 72 hours. Address Haywood Tire & Equipment Co. 1315 S. Oakley Ave. Chicago, Il.

| CATALOG No. 22 iS READY Small Steam and Gasoline Engines, 4H. P.up. Pumps, gears, model makers’ supplies. Sent postpaid (2 dimes pre- ferred) or 20c stamps. Modern Engine & Supply Co. 334 Monadnock Bidz ., Chicago

AMATEUR MECHANICS A book for those who like to make things. 132 separate articles tell how to Re. electrical and mechanical devices, reed fur- niture, fishing tackle, hammocks, etc. 128 pp. illustrated. 25 cents postpaid. Popular Mechanics Book Dept., 200 E. Ontario St., Chicago

Our BUREAU OF INFORMATION will answer all question regarding articles appearing in this magazine. Address Bureau of Information, Popular Mechanics Magazine, Chicag:

MAHER & GROSH CO., 106 A St., Toledo, Ohio Direct at Factory Prices This $2 KNIFE $1.18 Postpaid Hand Forged Razor Steel Blades Handy shaped Blade makes th! knife best for mechanics, sportsm $3.00 Postpaid Bend for our 100- spree joomeee tuaseet FREE

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POPULAR MECHANICS ADVERTISING SECTION 177 FREE Trial of Autovac The Amazing Discovery That Cuts Oil Bills 33':% to §0%! Now you can try this remarkable new invention on your Ford for 10 days at our expense. Send no money. Simply mail the coupon below. Here is a new scientific discovery that every man who understands a Ford motor instantly appreciates. It is called AUTO- VAC—and it is the invention of P.W. Craig —Motor Specialist. What it accomplishes is scarcely believ- able until you have actually seen it work. The first and most obvious thing that AUTOVAC does is to cut your oil con- sumption 3344 to 50%. It pays for itself 5 to 6 times a year in oil savings alone. But AUTOVAC does far more than this. Clean Lubrication At the present time dust and grit-laden air is constantly being drawn into the crank-case of your motor. This grit acts like an emery, grinding out the bearings. AUTOVAC stops this grit from being drawn into rank-case! Now for the first time you can feed your motor oil that is really CLEAN. And lean oil means an infinitely smoother-running motor—and longer engine life. By stopping the oil from passing from the piston rings to the spark plugs AUTOVAC eliminates the ause of mis-firing. It keeps the terminal wires and fan-belt dry by keeping the oil from contact with them, Thus sav- expensive replacement. How AUTOVAC Works \UTOVAC takes the place cf the oil-filler plug the crank-case of your car. It creates a partial vacuum which sucks the oil in—absolutely prevent- ng oil leakage in the joints and bearings. ITOVAC isn’t an untried experiment. It does the work every time. Over 65,000 Ford owners who have subjected it to every sort of test, enthusiasti- cally endorse what it has accomplished. Ford-Owner Agents Wanted You can make from $10 to $40 a day putting this amazing new invention on Fords in your town. We have a new selling plan that makesselling easy. Write now for Special Offer. Our Amazing Free Trial Offer We have yet to find a single instance where AUTOVAC has We Guarantee not made good! So we make this remarkable offer. Simply fill out and mail to us the coupon below. Send no money— pay the postman nothing. We will send you an AUTOVAC at our expense. Any child can attach it. You simp!y remove the oil filler plug insert AUTOVAC instead. It starts saving oil immediately. Your engine instead of being oily and sloppy is kept clean. Your motor gets clean oil. AUTOVAC comes to you at our ex- pense. If it doesn’t do everything that we say it will—and more—simply mail it back and you are under no obligation. If after 10 days you are astonished atthe results that it has produced, then mail us only $3.50—payment in full. You take no risk. So mail the coupon now. 1. That Autovac will cut your oil consum ption33 's to 50% 2. Will keep your terminal wires and fan belt dry 3. By proper lu- brication prevent fouling of spark plugs 4. Prolongthe life of your motor by keeping grit and dirt out. 5. Give you clean dirt-free lubrica- tion 6. Thatit will pay for itself five or Six times a year in oil savings Price $3.50 AUTOVAC COMPANY, 614 Wallace Building Salisbury, North Carolina MAIL THIS COUPON Autovac Co., 614 Wallace Bldg. Salisbury, North Carolina I accept your Free Trial offer. Send me Auto- vac. I will put it on my Ford for 10 days. If it does everything you say, I will send you $3.50 Otherwise I will return it—without obligation

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Who started this pump? Nobody. A tiny stream of water trickled into the mine. Faster it came, touching the float switch of the G-E Automatic Starter. In- stantly the great pump went into action. Whatever your in- dustry may be, the scientists and engi- neers of General Elec- tric Company are at work in it, discover- ing new ways by which electricity can lighten human labor and pro- tect human life. The experience and counsel of these men is at your command, without obligation or cost. In subways, coal mines, railway tunnels, the pumps are always ready, and the lives of millions of people are kept safe by this General Electric invention—a sentinel who never sleeps. GENERAL ELECTRIC

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POPULAR MECHANICS ADVERTISING SECTION Sargent Auto-Set Bench Plane Sargent Steel Block » Plane Sargent Steel Pocket __ may be removed and replaced without changing adjustment HE Sargent Auto-Set Bench Plane will mean a great saving of time and trouble at your work-bench. For whenever you have to remove the cutter, you can replace it at the same adjust- ment you were using and go on with your work. The cutter of chromium alloy steel keeps its edge an unusually long time. And always makes shavings—even when cutting across the grain or through tough, knotty wood. The cutter is so rigid it will never chatter. For the smaller jobs—the finishing touches or the work in close quarters—use the Sargent Steel Pocket Plane and the Steel Block Plane. They are light, handy, de- pendable and faithful to your best craftsmanship. See these planes at hardware dealers everywhere. Write for the Sargent Book of Planes. It is full of de- tailed information on these fine tools and many other styles of superior planes. SARGENT & COMPANY 49 Water Street. New Haven, Conn. SARGE Jools & Hardu dune Hardware Manufacturers

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POPULAR MECHANICS ADVERTISING SECTION Bench Vise No. 168 Price $7.40 * HEN put this Goodell-Pratt Other tools for amateur mechanics Vise on your work bench. No matter what kind of work It’s the equivalent of having two you want to do, no matter what more hands, for it will hold any the job, you’ll find somewhere in piece of work tight and rigid. the Goodell-Pratt line of 1500 The only bench vise made with Good Tools, the very tool made for two-guide-rod construction. These that specific kind of work. steel guide-rods are pressed into The design, workmanship, and the movable steel jaws and runin finish of all Goodell-Pratt tools long reamed holes back under the make them splendid investments small anvil. Jaws open 2 inches. for men who love good tools. Weight, 10 pounds. Write for catalog No. 15. It illus- Iron parts are finished in red trates and describes the Goodell- and black enamel; steel parts are Pratt line. You ought to have a polished. copy. GOODELL-PRATT COMPANY, Greenfield, Mass., U.S.A. Tlamith “‘A work bench without a good vise is almost as lack- ing in equipment as a saw without a handle.”’

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POPULAR MECHANICS ADVERTISING SECTION . “Topkis costs One Dollar —but I’d pay twice that” OPKIS certainly gives me my money’s worth—and then some! Dollar Topkis more than repays its cost every minute I’m wearing it. “On top of perfect fit Dollar Topkis gives me better fabric and longer wear than lots of underwear that cost me double. “It’s good to know that when I buy Topkis Size 38 I get full 38 measurement. I can’t try on underwear in the shop, like a hat or shoes.” Men everywhere say Dollar Topkis is the biggest underwear value. Easy, roomy Free booklet tells wh fit. Extra long, extra wide legs. Big arm- holes. Full cut chest and waist. Best nainsook and other high-grade fabrics—pre-shrunk. Full size guaranteed. No mistake, the Topkis Men’s Athletic Union Suit is a big dollar’s worth. No.- good dealer will ask more— but they know it’s worth more and will say so. Men’s Shirts and Drawers, 75c¢ a gar- ment; Boys’ Union Suits, Girls’ Bloomer Union Suits, and Children’s Waist Union Suits, 75c. In Canada, Men’s Suits, $1.50. at you ousht to know about underwear. Write for it. TOPKIS BROTHERS COMPANY, Wilmington, Delaware General Sales Offices Ask your dealer for TOPKIS. Athletic 350 Broadway, New York City Look for the TOPKIS label.

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POPULAR MECHANICS ADVERTISING SECTION THESE MEN WON—WHY NOT YOU? The following IDEAS for Pressed Metal Articles, heretofore made of other materials, have already been purchased from readers of Popular Mechanics. The Engineering Advisory Board of Pressed Metal T.E.C. reports on Ideas thus far approved, accepted and paid for, as follows INDEX Article described as per in SUBMITTED BY: . ~ structions in the Pressed Metal (To whom checks have NO iN Booklet. (Heve you one?) duly been mailed.) 130 Piston Vise ‘ .Mr. GEorGE H. BaRROTT Box 313, Shelburne Falls, Mass, 115 Side Frames for Sewing Machines... .Mr. Cuas. E. Bown 414 Oxford Ave., Dayton, Ohio Baby Carriage Wheel Toy. . ...MR. VERNON W. J. Corrin 174 Drayton Ave., Toronto, Can. Spring Clip Mr. ERNEST GRAY 173 East 3rd North, Logan, Utah Parts for Hot Air Furnaces > ao cad Parts for Police, Fire and Tel. Station cali ie ee a Boxes z ° : Auto Hood Spreader em i date Dr. A. C. MULLER Strathmore, Calif. Pulley Guard.... Mr. C. R. MULLIN 314 2nd St., Watertown, S. Dak. Toilet Seat and Shoe Lace Fastener. . Mr. A. J. McCorMACcK 294 Elmdorf Ave., Rochester, N. Y. Auto Battery Casing aha J. NELSON Hopkins, Minn. Ladder Rung Replacement......... >. H. Rice, c.o. Engineering Dept. Olds Motor Works, Lansing, Mich. Slot for Cleaning ; Mr. PAuL F. STINER 520 2nd Ave. East, Twin Falls, Idaho Signs for Houses and Roads. . Mr. Scott M. SAWYER Glenwood, Minn. Clips for Wire Lines.... as Mr. H. M. TAyYLor 17 Caithness Ave., Toronto, Can. Auto Emergency Brake... ...MR. W. C. WILSON 924 W. Maple St., Johnson City, Tenn. Storage Batterv Plates . C. R.. MULLIN 314 2nd St., Watertown, S. Dak. Photo Support , oeeeeeees+s MR. Percy L. MANN Box 104, Grant, Mich. No longer need your mechanicalcleverness remain “hidden underabushel.” It seems that almost everybody is suddenly (and most intelligently) interested in PRESSED METAL. Why can not you suggest some new way to utilize its practically unlimited usefulness and economy? The ideas we buy become a public benefit. Just remember that Pressed Metal is anything that can be produced by stamping from sheets of steel, brass, aluminum, copper or any other useful metal The FREE Pressed Metal Booklet Tells HOW TO CAPITALIZE YOUR MECHANICAL TALENT or inventive genius—or maybe just your “good old common-sense.” It tells all the con- ditions and the amounts to be paid for the successful ideas, and also how to protect yourself against mis- approprietion of your creative thoughts by others. WRITE TODAY. (A post card will do, but please make it easily legible so it can be properly filed and acknowledged.) “Every day lost is lost.” Address "et PRESSED METAL ixkése COUNCIL 27 QUINCY STREET, CHIC AG O

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POPULAR MECHANICS ADVERTISING SECTION 183 Ve, AGENTS WANTED! Will You Sell Your Time |X Heavy oit at 2000 tbs. for $1 00 to $200 aWeek? Ij; With no more pressure than | you would use on a hand tire- 2 | pump, SAAL Oil Shooter ac- Driver-agents wanted to sell Cale’ quaareten S008 peunas the only high-pressure heavy-oil of pressure | which 2 all , crashes through lubricating system for autosever |\Vf airt ana rust ne put on the market. Free trial forces the velvety y : ow of transmis offer sells them all. No experi- naa tot tom ence or capital needed. Any man | § Dearing No More “Greasing Day” who follows our instruction can _in Gasoline Alley Lae $5,000 to $10,000 a year. PATO MKS ceo

ore ruined clothes and ed dispositions. No more putting off that lubri- 1% Job for the service =r = Nani ° Lu rica ion! He lubriceting system that ally ® can go

e your cr “= \ ; 4 H 2 Hae i SS Ford Size $5.00 Heavy Oil—orGrease? ibrica , d . r ‘ . ‘yeqe hands ond > Complete with fittings and holster When you ask for a “‘can of 5. Also used for Chevrolet, Overland, grease”’ you usually get 25% lu- 2000 Ibs. «Hydraulic > ' Gray and Star. brication and 75% “binder”, e SAAL Oll Shooter util- Oe For all other cars: — h is wy more nor less esasimple and easily un- ; . than soap. In adry, thirsty bear- wry ye! op in bulid- } 00 ing grease can only get in where ing up ) pounds of hy- . 1 1 ~ » a 4 it won't do any good. Grease lraulic ae merely by Campiste is dead Lubricating engineers ag Ay plunger. . : say heavy oil is the 100% lubri- aie a ter be . >— - cant. Itislivel Itdoesn wr mee @ ton of pressure at the nossle. No coupling is used in the <4 S y , put, it flows all over the bear- BAAL. Bimply hold the pote . S . . ing. The SAAL Heavy Oil Sys- against tke ball-check 4 - ~ - pines a ae yy tem is the first successful method fitting S . which employs heavy oil fot ° : . lubricating steering shackles, fan, springs, transmission, differential

Tam 42 Fittings — fit every car! The largest car requires only 37 fittings. We : supply you = = fittings standardized and #4 it interchangeable nscrew the grease cups or oil cups from your car with pliers, and screwin [i Under the Hood SAAL fittings. No mechanic or expense neces- be flange medley sary. The SAAL Heavy Oil System fits all cars, under the hood, soit's convenient when and this is one reason the price is lower than ™ you stop for gas or before you start . 2 : : pes out in the morning to shoot heavy oil you must pay for other lubricating systems. into every bearing. Takes only a few Driver-Agents ! Get yours FREE ! minutes YS ae away your oil can and taSA Equip your own car without a penny of cost, oo ers ! and you will find it easy to take orders every- §f Deal Garage, Repair Men! Mail coupon for our irresistible offer and where with our free trial and money-back offer. sensational profit-maki proposition Ix t it t h fi . f “ SAAL Oll Shooter will be the biggest on't wait, be the first to write from your . selling auto-accessory in 1923. Get your territory. Mail coupon or telegraph! share of the profits! Coupon brings your big opportunity! ee" = art G. SAAL CO., Dept. 301 a G SAAL C0 Mail it ! 1801 Montrose Av., Chicago * . - Today! Please send me Dept. 301

| complete information about SAAL Heavy Oil System. I am marking X for | proposition in which I am interested () Agents proposition paying $100 to $200 a week () Free trial offer to motorists. Special profit-making offer to dealers, garage OF repair men

ve., ¢g CAPITAL '$2,500,000 Established 22years

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184 POPULAR MECHANICS ADVERTISING SECTION Motorize Your Bike With a Merkel Motor Wheel A complete power unit. Takes the place of the rear wheel of any standard bicycle. Easily Installed — Simple to Operate The motor is of the single cylinder, 4 cycle type, with intake and exhaust valves in head. Rated horsepower 2 '. The rear wheel is driven by gears direct from motor. Mul- tiple disc, heavy duty type clutch enables the motor to run independently of rear wheel. Clutch control operates from clutch lever mounted on frame within easy reach of rider. Magneto for ignition built into flywheel of motor. Car- buretor has adjustable needle and air valves. Motor controlled by valve lifting lever and throttle lever mounted separately on handle bars, insuring positive and direct control. All working parts of motor automatically oiled. Rear wheel of special heavy construction fitted with 26x2 clincher tires. Hundreds of satisfied users endorse this dependable and | economical unit. Prices reduced to bedrock. A wonderful opportunity ! Write today for the Merkel Message, giving full particulars of our unusual offer. } MERKEL WHEEL, Dept. P-6 HENDEE MANUFACTURING CO. SPRINGFIELD, MASS. She Merkel a5 Whe el FROST JAC-BOx RK, Sul: $goo A handy accessory for your receiving set Y means ofa Frost-Radio Jac-Box you can quadruple the jack capacity of your radio set. Neat—handy—beauti- fully made. Permits use of three pairs Frost Fones and loud speaker at one time or four fones without loud speaker. See it at yourdealer’s. Order one for your set. COMMERCIA and PRINTING Contains hundreds of ideas and suggestions of service to th advertising man, printer, salesman, student, photographer artist, engraver, electrotyper, bookbinder, paper jobber, etc and will be invaluable as a permanent work of reference. 850 Pages. Over 1500 Illus. Cloth, Price $15.00, postpaid. Popular Mechanics Book Dept., 200 E. Ontario St., Chicago Our BUREAU OF INFORMATION will answer all questions regarding articles appearing in this magazine. Address Bureau of Information, Popular Mechanics Magazine, Chicago = | Range, Power, Portability With a Single Tube! Vacation time holds new and untold pleasure, when you tune in with D Reflex, the most powerful single . circuit ever built. Through a loud speaker, it brings but the most distant stations; and w headphones it ranges from coast r coast. Its light weight, less than | pounds, with dry cells, makes it e for camping trips or week-end tou: Responsible for the effic-ency of dela dinamene and circuit, and the secret of its am é neeee tat building ‘the power is the Erla radiofrequency . : Erla Duo-Reflexcircuit, transformer. Be sure to get the gen isobtainable gratiefrom Electrical Research Laborat« 4 leading dealers. Also Yept. J. 2515 Michigan Ave., Ch complete blue prints are available at 25c per set. Ask yourdealer or writ« ee eee eee ee ee eee Erla Bulletin No. 13,

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A\ The Oliver Burner makes any range agas slore—on and off at turn of valve. POPULAR MECHANICS ADVERTISING Fits all hot water, hot air or steam furnaces. SECTION 185 Sizes to fit all heating stoves give warm room al once—no watting for fires to come uf. New Kind of Fuel Replaces Coal -In Ranges, Heaters and Furnaces Agents, Salesmen and Regional Distributors are needed Demand is enormous. Thou- sands of spare time workers, agents, and salesmen are needed. $75 a week ! Many getting $1,000 a mon Free Fords to producers. Men with crews who can swing whole territory can earn $10,000 to $50,000 a year. Write or wire at once for de- tails or appointment. Write to me nally, B. M. Oliver, olldress shown below. OLIVER - BURNER CO. OIL GAS VERY householder in America has been waiting for this start- ling new invention. For by its use you are freed forever from the dirt and muss of coal and ashes, from the uncertainty of fuel short- ages and from exorbitant prices. Cheaper, Cleaner, Hotter! A St. Louis inventor, Mr. B. M. Oliver, has perfected a simple mechanical device which combines 95% air with 5% kerosene, thus es a new kind of fuel technicaliy nown as oil gas which burns with an intense, clean flame in any type of hot air, hot water or steam heating plant—giring three times the heat of coal! No Expensive Equipment! Best of all, the equipment is so simple and inexpensive that ay family can now afford to install an Gas Burner. The Oliver regulates the tem ture of your home automatically. Simply set the thermo stat and your Furnace runs itself. No more fires to build and re- build, no more shaking of ashes and continuous tending of fires. No more frozen pipes, cause this heat stays at any temperature, with- out attention. No need for you to pay exor bitant prices for coal (oa City OLIVER OIL-GAS BURNER CO., 2014-F Oliver Bldg., St. Louis, Mo. Send me your b ok New Kind of Heat.” and full details of Burner and prices I am interested in the burner for a } Heating Steam Hot Air) Stove Hot Water) Furnace No more worry about coal strikes, no bill for hauling ashes or janitor service. Simply put this amazing new invention in your Furnace, Range or Heating Stove. Instal it yourself in a few minutes and the dirt soot, smoke, and drudgery of coal is ended lorever. Satisfaction Guaranteed! Already this amazing invention has beer severely tested under laboratory conditions in thousands of homes. Its performance is so perfect that Mr. Oliver guarantees it absolutely. Find out now how you can burn this new cheap Fuel in your furnace or stove. The coupon below will bring you this informatior and will entitle you to a special Low Introductory Price if you send it at once rhere is no cost or obligation. Mail it now OLIVER OIL-GAS BURNER CO. 2014-F Oliver Bldg. ST.LOUIS, MO. Oldest and Largest Manufacturer of Oil-Gas Burners in the World Canadian offices, 2014-F Webster Bide., Toronto, Ont,

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This Beautiful Book | }| owen On Wood Finishing | | ; FREE ‘ 1 The Wood’ inet wi IVES complete instructions for finishing all wood —hard or soft, old or new. Explains just what materials to use and how toapply them. Tells how inexpensive soft woods may be finished so they are as beautiful and artistic as hard wood. This book is the work of experts— illustrated in color. Gives covering capacities, includes color charts, etc. JOHNSON’S ENAMEL Johnson’s Perfectone Undercoat and Enamel is the ideal finish for wood, piaster and metal. It will not chip, check, crack, peel or change its color. Gives a beautiful, eucasca eeaseccaeuces germ-proof porcelain-like finish which is imper- S. C. JOHNSON & SON, Dept. PA6, Racine, Wis. vious to hot soapy water, iodine, ammonia, etc Please send me, free and postpaid, your Instruction Book on Wood Finishing. The best idealer in paints Fill out and mail coupon for a free copy of “The Proper Treatment for Floors, Woodwork and Furniture.” Ss. C. JOHNSON & SON “The Wood Finishing Authorities” Dept. PA6, RACINE, WIS. Canadian Factory—Brantford he re fs My Name My Address City and’ tate rririiii? Titiiiiiiiiiiiiitiiiiiiititttit ttt ttt ttt ttt

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CHICAGO $e LLARS KRITIRSON BROS, Inc Check protector con- did not — in cap does of $100.00 ma- chi Rolled gold, tight grip, spring clip. inventi Screw pres sure fill- ing device fille or cleans in a jiffy name. Patent Air - cushion i-bar prevents leaks and blots 14-karat tempered, iridium tipped, gold pen made by new secret process. 95,000 A YEAR WITH POCKET SAMP HIS reraarkable new to every real business man on sight. Needed by every one who writes checks. The man who will not pay $100.00 for a machine check protector wants this new device for it gives tay naga invention appeals him all the protection he needs. The man vho already has a high-priced check pro- tector needs this new device for two reasons. rIRST—He can use this device when away from the office SECON D—Ordinary check protectors protect against raising mounts only. Crooks reap big harvest now through altering iyees names on checks and making changes on notes, itgages, and negotiable papers of all kinds. New device nts changing names on checks and protects any part of any kind of paper against any kind of change. Best of all, this wonderful device, which does even more than 1.00 check protector, is offered your customers free. is Inserted in the cap of a perfect, flawless, easy flowing tain pen—a pen which has exclusive features which make customers prefer it to all others. You could get the rices for this pen even without the wonderful “security” \ tion device And now that vou can offer this device FREE, every man you meet should be a customer. S ne Salesmen make $25.00 to $50.00 a week ike $100.00 a week up 0.00 to $15,000.00 a year Full time District Managers can clear Wr us today for special representatives’ proposition W how you an easy way to increase your income, selling cle that will excite any wide-awake man’s interest. ike a sale in nine cases out of ten 70% of name oO! payee to checks had been checks if you use the new handy method. check protector was lost through changing “‘bearer”’ or “‘cash.’’ Many of these altered “‘protected”’ by expensive machines which protect the house. That cannot happen to YOUR This amazing new m stops check raising as effectively as a $100.00 in addition it prevents alteration of payee’s And you may have this protection free. this enormous amount CHECK-PR' FOUNTAIN PEN smooth writing, easv flowing pen wit! las a new patent point which suits eve Is a handsome, out a flaw hand—-at first use, it operates as easily as if you had been using this pen for years —feels like an old pal Five exclusive feature make it superior to most fountain per And without raising the price this re markable new check protector ir dorsed by banks—has been inserted in the cap This simple device both amount and name and drives acid-proof ink into cut Just one single stroke, and amount and name are protected in a way that batfies mo scores ‘ expert crooks. Even if you have » hish. priced protector get this one to protect payee s name or to use when away from the office. Order now on coupon below. KRITIKSON BROS., Inc. goo W. Jackson Bivd. Dept. P. M. a large pen. Specify 0 if ou long - short models wanted. CHICAGO, ILL. KRITIKSON BROS., Inc., 900 W. Jackson Bivd., Dept. P. M., Chicago, Ill. Gentlemen: Enclosed check or money order—please se nd t me one Security pen, No guaranteed for five yea I Style of point preferred Coarse Posting, model Send $3.00 or $3 0, $y yy By ll size slender pen or ”) for a xedium size pen and $5.00 i Med. St in flexible Fine Medium Broad Stub Steno ] or short or stuff action, long | Name Address s plana ig wl of I i

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30 Days’ Free Trial : ment and exclusive features Facto When you buy a Ranger you are dealing direct with the makers at Factory Prices. Your “Ranger” is waiting for you. The parks, country lanes and swimming holes are calling you out of doors to health and freedom. When we get your order your bicycle will leave on a fast ex- press train (e!’ charges prepaid) packed in a waterproof paper bag and enclosed in a strong wooden crate. Safe delivery in perfect condition guaranteed. Pay $5 a Month at once enables you to take -to-Rider If not convenient bicycle, we advantage bookkeeping on credit accounts. Parents frequently initial small payment and energetic boys and girls save later monthly payments. MEAD CYCLE COMPANY Dept. T-108, Chicago, U.S. A. Send me the new Ranger Cotalogne, factory-to- rider wholesale prices, 30-day Free Trial Offer and Easy Payment Terms. Name.. R. F. D. or Street No. Town i nctesesceravtniensernsent FACTORY DISTRIBUTORS IN 264 CITIES The nearest city (with a population of 25,0000r more)which I can conveniently visit to select a Mead Ranger is If you have a Special Factory Distributor there, send me letter of Introduction to him so I can inspect the Rangers and take delivery from there at Factory prices or on Easy Payment Pian if I prefer. If at the end of thirty days v: to pay cash for your will ship it to you and arrange with you to accept monthly payments which of our rock-bottom factory-to-rider cash price with only a slight amount added to cover the cost of extra i advance and earn the ee for yourself the values found in Ranger bicycles with their complete e¢ ment of accessories and extras. Send to-day for catalog and select the m you prefer. Ride it thirty days, test its speed, sturdy qualities, de )u want to return it for any reason, send it back and you will not be ot 5-Year Guaranty "=" ranted for five years. This means we make good trouble arising from any defect in workmanship or material at nocost to you. Our guaranty \ is a written contract—we are di- rectly responsible for the satisfac- tion and general performance of your bicycle because we made it. Tires and Equipment » Our big free catalog illustrates and describes parts, equipment and sundries that our the more than a million riders may need. All are carefully selected from the leading parts makers of the world, to Save You Money at our Factory Prices. Get this FREE Catalog :;:: a for you and it will be sent as soon as we AS / At receive the coupon in the lower corner of “C@q / Ny this page. If you prefer send a postcard— ce ¥ only write your name and address plainly. &., 7 / Turning the pages of the “Ranger” catalog is like walking down the aisles of the largest and gre ate cycle stores seeing bargains, new ideas and convenien never saw or heard of before. Send No Mone Ask for the big catalog and full y our Factory Prices, marvel , Easy Payment terms, Read espec ially about our extr $5.00 Premium set which goes with every “Ranger” bicycle MEA CYCL COMPA DEPT. T-108 CHICAGO, U. S. There are 44 styles, colors and sizes in the famous line of RANGER Bicycles amodeltosuit every taste and any pocket book. IS N ~ ‘Ranger’ We have c od Ad fle

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