Popular Science Monthly 1919-12: Vol 95 Iss 6
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Foundd MONTHLY Ig 4 4 & i ah U.S, Pat. OF ; Ss
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Radio-Stee] = i | Soa AKE one of those dwind- : ling dollars which has lately been getting fifty-five : cent value in everything else— [ restore its self-respect with [ an EVER-READY and pay a : long belated debt to your face. | Extra Radio Blades—6 for 40c | American Safety Razor Co. Inc. / Factories—Brooklyn, N. Y. | Toronto, Canada, London, England : | (Li =] = 2 = = =| = | =| i 1] = = | = | = = WA ~ / FS a
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Popular Science Monthly Waldemar Kaempffert, Editor December, 1919; Vol.,95, No. 5 ‘Twenty Cents; Two Dollars a Year Published in New York City at 225 West Thirty-ninth Street Why this is called the December Issue This issue of Popular Science Monthly was printed in Chicago, not in New York. All through the month of October hardly a printing press was running in the City of New York, as a result of one of the most complicated and difficult labor union dis- putes that has ever taken place. It was not a controversy between pub- lishers and labor, or even between publish- ers and lahor unions. Popular Science Monthly for one is a partisan of labor. We always have been ready to do every- thing within reason to insure a square deal for our workers. The presses had just started on October first, when the order came that took every printer out of the press rooms of New York. At the end of October, when there was no hope of any immediate settlement of the labor dispute, (a dispute between the nat- ional unions and the local unions) Popular Science Monthly appealed to a great prin- ter in Chicago. He said, “VIl gladly do anything I can to help you. I have big, fast presses but they take a page only eleven inches long, and your page is twelve inches. Your plates are all made and they are too big for our presses.” Nowhere else in the United States, ex- cept in New York and Chicago, as far as we could find out, are there fast, high grade “rotary” presses, and iarge binderies, equipped to get out so large an edition of so large a magazine as Popular Science Monthly. And here we were, the only equipment obtainable being presses too small for our plates. Well, we said, this is a chance to prove our resourcefulness. If Popular Science Monthly can’t invent a way of overcoming this mechanical djfficulty pro- bably no one can. The problem was put up to Mr. Hanson, the art director, and he solved it in a most interesting way. He decided to get a fine proof of every page that was too large, and make a new plate for the smaller press by photograph- ing the proof upon copper, thus making a line cut on copper instead of on zine which is the usual way. The results of this emergency make- shift policy are almost unbelievably satis- factory. Of course, it has cost a great deal of money. It was necessary to get a friendly engraving house to turn over its entire plant to us for this work, and to work Sunday and at night, but the thing has been done, and your Popular Science Monthly, set up for the regular twelve- inch long page, has been printed on an eleven-inch page. In shortening the page we had to cut off the page numbers. Otherwise the magazine is complete— the same great variety and quantity of infor- mation and entertainment is presented each month to our readers. When we found that we could not pub- lish this issue until the end of November, . we decided that, rather than bring out a November number at this time and have all the issues late for several months to come, we would take the bull by the horns and issue this as the December number. The next issue—the January number— we hope to publish between December 15th and 20th. The February issue, then, will be published on January 10th — and after that we hope to publish regularly on the 10th of the month. Subseribers of course will receive the full number of copies for which they have subscribed. If your subscription was to ex- pire with the December issue, for instance, you will now receive the January issue as the last of your present subscription. ™ : | . 4: || = | = IE = bial = = = = = : |) = = = Gj 4 : Ad ig = E = = = H } | | : : i H ij 4 = = = FS = = = = = f = :
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Weighing only two hun- dred pounds the stump- puller pictured above hauledthetankBritannia over the pile of logs; we readily believe that it can pull down ten trees a day Multiplying the Power of Your Arm F you were asked to pull the tank Britannia over the bar- rier of logs shown in the illustration, you would say that one man couldn’t possibly do it. Yet a machine designed for stump-pulling did this unusual feat, and could do it all day without breaking or straining its mechanism. This machine pulls down from eight to ten trees a day, and requires only two men—one to set the line, the other to work a lever. Its weight is a little more than two hundred pounds. All the working parts of the machine are of case- hardened steel. The machine actuates two pawls, a long and a short one. A twelve-ton lifting jack, operated on the pawl-and-ratchet principle, is the mechanical first cousin of this invention, the only difference being the arrangement of the parts. The machine rotates a drum and hauls in the cable one inch at each stroke of the handle. The sweep of the handle is about three feet, the necessary pull being given by the operato in a standing position. No trouble was experienced in pulling the tank over the ob- struction, except that of the snapping of a one-inch steel cable, incidentally nearly cut- ting a man’s head off. You can imagine the tension of this cable when the leverage was applied. This unusual feat suggests others that may be performed with the contrivance. For in- stance, old buildings may be razed, stone and brick walls pulled down, as well as trees, chimneys, and so forth. For this machine is capable and, moreover, willing to cooperate with you in speedily effecting the downfall of the thing you have in mind. A chance for the bicycle devotee to kick the | pedals and sharpen his tools all at once Did You Get Wet? O, you decide that you won’t take an umbrella—es the customary result that you reach your offi drenched. And there you sit and shiver, while your sn clothes slowly dry, wondering what disease you wil] con tract. But why shiver and worry? : Go to the stock-room and requisition a large Piece of wrapping-paper. Cut out two large square pieces, roll y your trousers to the knee and wrap up your legs in the heavy paper. Then roll your trousers down again and th will dry well away from - the skin beneath. Thus you avoid discomfort and quite possibly disease at the very small price of a pair of bulging legs. The Britannia is shown here on her way over the top of the logs, propelled not by her own power but by a small stump-puller Roll up those wet trousers and insert heavy wrapping paper, When you pull your trousers down your legs will remain dry _ Ride a Bicycle while You Grind HE modern successor of the old-time farmyard grind- stone combines economy with efficiency. It is a one- man machine, and it does its work more quickly and better than the old grindstone. It will sharpen a mower, sickle or ensilage-cutter in ten to fifteen minutes; a scythe in one to two minutes; a harrow disk in five minutes; and a whole set of cutaway disks in from two to four hours. To sharpen a dull axe with the old grind- stone required at least fifteen minutes’ work for two men; with the new grinder one man can do the work in two minutes. The new grinder has a steel bicycle. To a vertical tubular post, which bears the grinding disks and the driving mechan- ism, is attached a framework supporting the seat of the op- erator. The grinding disks, which are made of a new com. position of high abrasive power, are on the same shaft and re- ceive their motion by a worm. gear from a vertical shaft en- closed by the tube of the sup- ‘porting post. It is worked by foot power by means of bicycle pedals, and imparts high speed to the rotating disks. The bearings supporting the moving parts are enclosed to keep them free from dust and dirt. Neith- er oil nor water is required in the grinding. framework similar to that ofa. ( a — : | } | | a i | 4 . 4 . 4
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id rs y It does five things—dries the hair and cools, heats, washes and deodorizes the air Heating, Cooling and Cleaning the Air “TS this an oil-stove that I see before me?” No. It is a combination fan, heater, air-washer, hair-drier, and deodorizer. Just below the mid- dle of the device is a tubular projec- tion where all these different functions are performed. Just behind it is a suction electric fan which sucks in the air and sends it out again ten degrees cooler. When the heating attachment is connected with the exhaust, the air comes out hot. When you wish to dry your hair put your head in the path of this hot blast. The deodorizer also is attached to the exhaust. The inrushing air is cleansed by passing it through a wick saturated with water from a reservoir placed on top of the machine. All the dust and dirt adheres to the damp wick and the air is literally washed. Bundle up the Milk to Keep It Cold HE well known principle of the fireless cooker has now been applied to cans for shipping milk in bulk. Hundreds of thou- sands of gallons of milk are spoiled yearly during shipment when the ice in the refrigerator cars is not renewed along the way. In this new can heat radiation is reduced by means of an outside jacket that entirely surrounds the © milk-can. Holes are provided, so that the milk-can handles may be used in loading and unloading. The substance that prevents | the heat from passing through the jacket and souring the contents consists of a chemically treated layer of felt one inch thick. This is placed between the inside and outside canvas covers of the jacket. This is a milk can wearing a jacket to keep the milk cold Horns? Yes, to help him hear; they are attached to his eye- glasses Linking Glasses and Ear- Trumpets Together AVE your eyes and ears gone back on you? Then here is a way to get the best of both the offending members at once—a combination eye-glass and ear-trumpet. These novel ear-trumpets are made of a light-colored transparent material and are attached to the sides of the eye-glasses. At the outside end they are large—about the same size as the lenses, but they taper down until, by the time they reach the ears, they just fit within. Though a head-en view of this de- vice looks like a double pair of eye- glasses, we are told that they are “as inconspicuous as_ possible.” They are likewise said to be very easy, to wear and quite comfortable. Their convenient compactness is of course the chief point in favor of this useful invention. Take Your Bathtub with You OW what’s in that large | case .the summer boarder brought?’ murmured the farm- er suspiciously. He hovered round the boarder’s room and soon he heard run- ning water and splash- ing! His boarder was taking a bath! The large case had in it one of the new bath-cabinets invent- ed by George Stry- ker of Wilson, N. C. It contains not only a tub but a water-tank with two com- partments for hot and cold water, an oil heater, a medicine-chest, a towel- rack, a closet, and an extension seat. The tubis aregular whiteenameledtub. You can have a hot bath in the wilderness if you take a folding bath- cabinet along The cold water compartment is located above the hot and is insulated from it by an air space between. placed directly under the tank heats the water in the lower com- An oil burner partment. Each has its own faucet. When not in use the tub swings up into place thus making the cabinet easy tomove. The entire cabinet, when closed, is four feet wide, two and one half feet deep, and six and one half feet high. Weights at- tached to the tub by cords hold it in place when raised, and these same sash weights make rais- ing it as ezsyas rais- ing the window. | | | | = | rind- > ifteen ig men; man Lutes. a peed eith- in \ 8 8 ie
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© Press Ilustrating Service, Inc. Extra! It Came by Airplane © Underwood & Underwood First Aid to the Potato OU’D like to deliver newspapers too if you could do it by air- ‘THE potato doctor is performing above. With the medicine tank plane. (Or maybe you wouldn’t?) That’s what they do in San Francisco—sometimes. Of course ordinarily it would be admiring audience. ruinous to hire an airplane in order to make a delivery of a few dollars’ worth of papers. But suppose the paper has landed a big scoop. Or suppose the editor wants to impress residents in the neighboring towns with the enter- prise of the City Daily News. Then it might pay to have an aviator among the route men. newspapers in the picture are a special edition of a ‘San Francisco evening paper. make out the headlines but probably it was a scoop. They flew from San Francisco across San Francisco Bay to Oakland, with the papers, in record-breaking time. For He Is An Englishman “ A POLICEMAN’S lot is not a happy one,” said the immortal Gilbert, but he did not know the English policeman of to- day. His lot may be quite happy, as the picture below shows. It is a hot day and he has run to cover under an advertising sign. Not that he thinks the world has grown honest or that the race of speeding motorists is extinct. In fact he apparently has his eye on someone now. The A Concrete Illustration OU think the above is a scene in the luxurious tropics—Cuba, perhaps, or Mexico? Wrong! You mustn’t be deceived by appearances. It’s nothing but an amusement park near Chicago, Illinois. The romantic balcony with the alluring arch beneath is just the corner of a cabaret; and everything—trees, vines, rustic railings and all—is made of concrete. on his back he is spraying diseased potato plants before an The most fashionable disease in the potato world bears the seriously alarming name Phytophthora infestans, It is a fungus growth which occurs wherever the potato is grown and thrives in warm and showery weather. It seldom attacks young plants; patiently it waits till the potatoes are nearly grown and then it attaches itself to the leaves and stalks of the plant. It comes in the form of purplish brown or black hlotches of various * sizes. It attacks the leaf tips first and gradu -lly works its way down the stalks. It does not. grow on the outside of the leaves, but under the skin; thus it is very hard to fight. Experimentation has shown that the so-called Bordeaux mixture is the most effective liquid with which to spray afflicted leaves in order to kill the parasite, How They Bag the Orange HOUGH the man be low is evidently letting the oranges out of the bag, this bag was really con- structed for gathering them. It is made of heavy canvas reinforced on top. with leather and fastened to a wire frame. You wearit slung over your shoulder by an adjustable canvas strap.When ready to dump the fruit, unhook the bot- tom of the bag. 4 | It tip wa bo: yo is the dit sul us! ch sul bic 8a | x od
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‘Every Cigarette Its Match OT a match? Never mind. Here’s a striking cigarette. It comes in a box with sandpaper on the edge and it has a sulphur tip—just like a match. When you want a light you strike it on the box, the flame spurts out and there youare! The sulphur composition is odorless and does not affect the flavor of the cigarette. The igniting tip is made by dipping the cigarette into a sulphur solution. This solution usually consists of a mixture cf chlorate of potash, antimony il sulphide, red lead, and ee: bichromate of potash. . The sandpaper on the match- box has in it glue, sand, powdered glass, and colcr- ing matter. Make a Noise Like a Ferret ECENTLY we have been induced to temper our sports with mercy and in some states, notably Ohio, the ferret has been barred as a rabbit hunter. But you can’t shoot a rabbit in his burrow. How then persuade Mr. Bunny to play his part in your game ? A teller in one of Cleveland’s banks dis- covered a way. He makes bunny think that worse than ferrets are after him. He has added a long piece of rubber hose to his regular hunting outfit and when he comes to a rabbit’s home he pushes one end as far as possible into the burrow. Then he puts the other end to his mouth and makes weird noises—weird ferret noises (whatever those are). Anyway Mr. Bunny recognizes them and out he bolts, only to be captured as shown in the picture or shot down in the bad old-fashioned way. © Ceniral Photo News Service Shades of the Norsemen pRoeas.y nothing that man has in- vented took so early and kept so long the same shape as the ships in which he sails. Lief Ericsson, when he set the first European foot on American soil, came across the seas in a high-prowed vessel not so un- like that with the fish king figurehead just above. Divest the craft of bridge and smokestack and she, a modern pleasure craft on the Rhine, much patronized by our doughboys, might be a large edition of the ship of the Norse sea-rover. Above this German idea of a joy boat we have placed for contrast the U. S. S. Arkansas, which, with her waterline length of 554 feet and 93 feet beam, could have swung the Norseman at her davits. She is not quite the latest thing in marine architecture but a fighting ship such as the great Lief never dreamed of even in his most ambitious sea-going days. But the model that he used in that far-off time has lived through the years and will do so as long as ships float on the seas. Peel Off a Stamp from Your Roll HREE little Ed- wards all in a row and many more where they come from. They are all rolled up like . mending tissue on a small convenient spool. Each Edward is part of a penny stamp; there are sixty of them on the roll. The stamp spool is the latest style brought out by the British Postal Authorities. It seems that they were accused of being behind the times. . They did not like this accu- sation and the spool was the result. It is really exceedingly convenient, as there is no chance of the stamps becoming: acci- dentally stuck together. ‘In Again, Out Again \VWBEN you drive a pile into the ground, you naturally don’t expect to see the point again—but you can’t be sure. Look at the pile pictured below. The ar- rows point to the beginning and the ending of it. It was a fifty-two-foot pile of green Douglas fir. It went into the ground like any other pile, except for a slight slant. Then, suddenly, when forty-two feet had been driven safely underground (or so it seemed), the point came sneaking to the top again eighteen feet away. How did it happen? After the pile had — been driven in several feet, it struck a rock at an angle and was deflected. A little later it struck another rock and was bent once again. The. dampness below ground helped to make the pile flexible. a stans, fight. leaux ‘h to asite, q ige n be thing > bag, con- them. anvas with toa ear it ulder invas lump bot- ig \ 7
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Hi Saving the Fly fii a Milky Grave ger ye have frequently proved that for one deep dr of milk they will gladly die. But the dairymen constantly busy foiling these suicidal attempts, dairymen hang strips of bylap over the doorways thro Feed her the food on each side of her and she will lay as many eggs as are in the basket How to Keep Her Cackling NY normal hen can equal the achievement of the hen in the picture if she is properly dieted. Here are three rations recommended by poultry experts: (1) Equal parts of cracked corn, wheat, and oats. (2) Three parts of cracked corn, two parts of oats, and one part of wheat. (3) Two parts of cracked corn and one part of oats. A dry-mash mixture consists of two parts of corn meal, one part of bran, one part of middlings, and one part of beef scrap. For every twenty-eight pounds of mash and forty-eight pounds of grain, with access to water, grit, and green feed, the bird will lay one hundred and forty-two eggs. This Strange Object Is a Snail’s Tongue By Edward F. Bigelow HE so-called tongue of the snail is a strip of horny ma- terial, rasplike in appearance and a good deal so in action. It oc- cupies a place in the snail’s mouth corresponding to that occupied by the tongue of a cat or dog. It is in the form of a tube, and grows forward as it is needed, much as does the human finger-nail. This tongue is not at all like your tongue or palate, but is really a tube that passes back- ward and downward beneath the mouth. It is closed at its hinder end, and in the front or floor of the mouth opens out to form a nearly flat surface. On the in- terior of the tube, as well as on the flat extension, are transverse * rows of minute teeth set on flattened plates, each tooth usu- ally having its own plate, al- though sometimes several teeth are on one plate. The total number of teeth in the common snail is twenty-one thousand, and in the common slug twenty-six thousand, eight hundred. The. short, thick tube of the slug and of some of the land | The dairyman’s foot is on a treadie which operates an ingenious fly-screen which the cows enter so flies are brushed off the ae back. Others spray their iin with chemicals which the fies don’t like, This dairyman’s idea of fighting flies ig to stand his pail ang Strainer near th _ Wall to which , cloth cover been hinged, The cover is mountej On a metal frame and in its no. can and straing hide beneath it, Then when the dairyman arrive with his pail ¢ cover drop, all with. out the trouble of setting down his pail, An Office Built for Two FFICE buildings surely vary in shape and size. In New York they tower high—one of small one—about four feet - square and nine feet high. Init State Railway Company do their work. It is made of concrete and is absolutely fireproof, though this precaution seems hardly neces sary in a one-room building having many glass windows and aglass door. There are twenty- one squere feet of glass in the windows. snails also is the “mill’’ in which the food is ground. The snail’s “tongue” has transverse rows of minute teeth set on flattened plates A common snail has twenty-one thousand teeth? the number varies greatly in different species mal position horizontal, The milk, he steps ong — treadle which raise the cover, pours out | the milk, and letsthe them having fifty-one stories, In Lynn, Mass., there is a very — two car starters for the Bay | of] lar ma | sul | th an co q LET ORS
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The first thing that strikes you is the pho- tograph of the man who wears the badge [ is nine o’clock in the morning at the Quarter- master Corps Depot, Jeffer- sonville, Indiana. Hundreds of artisans and mechanics, many of them foreigners, stream in through the gates. Each man is carefully scrutinized by the gatekeeper. He knows most of the workmen by sight, even by their first names. Here comes an unfamiliar figure. “Who are you?” says the gate- keeper. “Let’s see your badge.” The man throws back the lapel of his coat and exhibits a badge of identification. The badge is one especially designed for the use of the Quartermaster Corps; it has its peace-time use in every large factory. Look at it and you see a photograph of the man who wears it. That is not all. Figures and words surround the photographed face. ‘‘24’’—that is the age of the badge wearer; “5=1114”—that is his height in feet and inches; ‘‘168”’ that is his weight; ‘‘brown’’—that is the color of his hair; “‘blue’’—that is the color of his eyes. Whitewashing with a Pump AN you whitewash the walls of a store-room or factory C without whitewashing yourself and everything else in sight? Yes, if you use the machine shown in the accom- panying illustration. It consists of an ordinary fifty-five- gallon barrel, mounted on a small wheeled truck so that it is moved readily along the floor close up to the walls. The application of the white- wash is accomplished by the use of a plunger type of. pump situated inside of the barrel. The up-stroke of the pump handle sucks the whitewash into the cylin- der of the pump and the down-stroke forces it out and through a hose fitted with a nozzle, so that the fluid is sprayed upon the walls in a thin layer. The movement of the pump piston-rod also actuates two paddles to agitate the fluid and prevent the solid lime in suspension from set- tling. _ During the whitewash- ing operation such of the material as falls on the floor dries into a fine pow- der in its original form of lime. This powdery lime soaks up the grease. Proving that You Are Who You Are To the left is the outer frame _ in which the photo- graph fits, arranged so that the picture is easily inserted To the right is shown a finger print that appears on the back of the badge. Portraits are not sufficient proof The photograph ta- ken out of its frame Part of the mounting for your photograph Instead of slapping whitewash on the walls, spray it on evenly and neatly with a hose Turn the badge over and this. is how it looks when all put to- gether ready for use Beneath the photographs appears the number “1243,” by which the badge wearer is carried on the books. A photograph is not the safest means of identification. are more men in the world who look alike than many of us realize. So, in addition to having himself photographed the badge wearer must have himself finger printed. His finger print, duly signed with his name and dated, appears on the reverse of his badge. When an employee’s term of service has expired he sur- renders his badge. There is no chance for fraud. He is held to what the President calls ‘‘strict accountability.” Curiously enough, while the government was particu- larly careful in demanding that the badge system be intro- duced in factories, it was rather lax in watching its own officers. To be sure it did issue passes bearing photo- graphs, but there was nothing like the elaborate system of identification illustrated by our pictures. The Airplane that Leaped the Sea FTER the three cheers for Captain Alcock and Lieu- tenant Brown—who made the first non-stop flight across the Atlantic—had died down, people’s attention turned to the faithful Vickers-Vimy airplane that carried them across. Though the men were utterly exhausted at the end of the flight, the remarkable Rolls-Royce engines of the airplane were appar-- There ently as good as new and would have kept up their work for an indefinite time had not the airmen landed in a bog. At an average speed of about one hundred and seventeen miles an hour the airplane made the trip in fifteen hours, fifty-seven minutes. Since the engine speed was eighteen hundred revolutions a minute, each engine made nearly two million revolutions on the trip. Each piston traveled up and down a distance of three hundred and fifty- two miles, and the com- bined distance traveled by the twelve cylinders was over eight thousand miles! Twenty million sparks were supplied by the plugs. And not a single part failed. | | q d. The [frame S Nor. jon js Tainer ath it, nthe ITives | ail of a ON a Out if ts the with. le of 8 pail, 'wo Vary ories, very feet Init Bay their 3 a th: cies
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‘won’t serve as a guide for your _ ing box which not only takes the The four trains of the moving laundry are placed side by side and the inside walls are taken down; thus the four become one large room HOULD you seea steam tractor roll- ing along the road : with a train of four strange, clumsy trucks behind it, do not be alarmed. It is but a moving laundry. Wherea great quantity of clothes must be washed—in a section gang or lumber camp, for instance—it is easier to move the laun- dry than the wash. Two views of one of these laundries ready for work, are shown above. The four trucks have been brought up to form a square, and the inside walls taken down, thus Bringing the Laundry to the Wash — The steam tractor that pulled the laundry train to its destination now furnishes the power for the washing - machines making one largeroom, Within are two wasgh- ing-machines, two ex- tractors, one drying tumbler, hot and cold water-tanks, q pump, a soap-tank, and an electric lighting dynamo. Ina week one of these laundries will wash clothes for four thousand men. When it is time to move on, the laundry is reduced to its four original parts, the sides of the trucks are put back, and the laundry becomes a train once more. Though de- signed for war use, thislaundry fits right into peace-time jobs, Better Let the Shoemaker Footprint You OU may make footprints on the sands of time but they shoemaker when he makes your shoes. He needs more substantial footprints——-usually made in vase- line orink. Here is a foot-measur- outline of the foot in ink but indi- cates any abnormalities it may The White Ants of Siam against Germany ND the white ants were our Allies allalong! In fact, they are still at war with Germany. As evidence, look at the ruined meter shown herewith. When the white ants saw that ‘‘Kilowattstunden” written in large letters on the front | of the meter, they recognized it at once as a German word even have. In the box there is an endless rubber belt which fits over rollers at the ends. Between the sides of the belt there is a frame on which a foot-chart is placed. On the under side of the frame there is an inking ENDLESS INKED paPER CHART PARTITION Step on an inked pad and the impression on the chart below shows your shoe size though the meter was in Siam. They immediately invaded it and ate up every bit of insulation, leaving the cop- per and iron bare. they filled . the meter up with Then pad which wets the rubber as it rolls by. You put your foot on the rubber belt; the belt sinks down to the chart and because of the ink on its INK- PAD This diagram shows the arrange- ment of the endle‘s rubber belt. It is inked on the inner side by an ink pad over which the belt slides dirt. It wasin this condition when the as- tonished in- under surface makes an im- pression there. The density of the impression on the chart will indicate the condition of your foot. The chart itself will give the exact measurements of your foot. By following the dictates of the chart your shoemaker will be able to make you a.shoe which will fit exactly. Suppose your foot length reads six. You then find six on the small scale at the top of the chart and read across until you reach the number of your width. There you will find the letter of the width to suit your particular length. At the bottom of the chart there is a curve marked “heel.” Further up there are width and length lines. The width lines are numbered from the center out. spector made his monthly call. The ants had finished their disastrous cam- paign in less than a month. Doubtless they thought this just the place to build a cell In less than a month white ants reduced for their royal a flourishing meter to this condition pair. q | m gi Ci tl | 2 a t — & é ~
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em sh- our its guns, millions of practically no Introducing Women to Machine Tools T the outset of the war, for the first few frenzied months, we wondered how we could possibly make munitions enough to beat the enemy. An exhaustive investigation brought to light the fact that there were in the country 365 machine-tool manufac- turers, employing about 79,000 tool- makers, nearly every one of whom was engaged on some type of war work, either for the Allies or the United States—both of which meant that they could not be commandeered for Army Ordnance manufacture. So there was the situation—the im- mediate need for hundreds of tanks, thousands of big rifles, billions of cartridges, and all the rest of the 200,000 items of material manufac- tured by Army Ordnance, and available tools and mechanics with which to make them. Army Ordnance started “vestibule schools.” Em- ployees of the plants, both men and women, who had proved them- selves above the average in effi- ciency and loyalty were first put into the vestibule school in order to try out the system. Each pupil was given a single opera- How Hot Is That N alloy has been developed from which a satisfactory protecting tube can be made for pyrometers used in measuring the temperature of molten brass and bronze. The tube consists of three telescop- ing parts. The ten-inch protection tube, held in the lower end, is made of the new alloy, and is the part inserted into the molten metal. The heat- measuring device is entirely encased in the tube, and can be renewed. The alloy tip and the heat-measur- ing device are the only parts that require renewal. When the molten metal ultimately destroys the alloy tube, a new one can be installed, after which the connection is packed with a special refractory cement. If the tube is used till completely © destroyed, the heat-measuring element Do motors and dynamos faze her? Not at all; she is winding an ar- mature and smiles as she does it By M. F. McConaughby tion to learn, such as the lathe, for in- stance. This in- volved a complete mastery of the var- ious cutters, jigs, and tools used, and a thorough famili- arity with the basic operation, mechan- ism, and_ repair principles of the machine and. ma- terial being worked with. part of the tool being made concerned him in the least; in fact, he was instructed to ignore every other operation except Above you see the handy man —or rather woman—around the shop; she is operating a milling machine at present No other. Pot of A new alloy enables him to encase the pyrometer in a Protective tube when he is testing molten brass A transformer in the .making is shown above, and a woman is its maker. She is an ex- pert at pounding laminations the one on which he was working. As rapidly as the training of one group was completed, it was sent out into the factory and another group sent to the school, so that it was always kept filled. It was the theory of specialization and concentration in mechanics worked out to the nth degree—with the result that a girl of eighteen or twenty would come out of this school at the end of two months more proficient in the particular operation on which she had specialized than the average mechanic of five or ten years’ experience, because his ability is broad rather than specialized. These ‘‘vestibule schools” might well be continued. . Molten Brass? must be repaired. This can be done by cutting off the damaged part and then twisting and rewelding the wires. This procedure can be repeated until the couple reaches a length of three and one-half feet. It is not necessary to recalibrate the heat-measurer after rewelding it. H TELESCOPING TUBE SECTIO WHICH PYROMETER-FITS The tube consists of three telescoping parts and the heat-measuring device is safely encased within it ck, de- dbs, : our eter hite ” | en tat ven and ‘bit on, 1en | lace i, y' 3 i a
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EXHAUST GAS, UP HOT OIL FROM CYLINDER COOLED 107 CYLINDER AND PUMP The diagram of the cooling device shown above illustrates its extreme simplicity COLDAIRIN Tractors are made for heavy work and, naturally, are dependent upon their cooling system. Here is a new type of oil cooling apparatus which eliminates water entirely Cooling Farm Tractor Engines with Oil IL as a cooling medium has many advantages which water does not possess. It is less affected by tempera- ture, does not clog the circulating sys- tem nor rust the parts, and actively ‘contributes to the efficiency of the engine, The use of oil requires a different type of radiator from that used on the average farm tractor. To explain just what these differences in construction “are, the method of oil cooling employed by a pioneer farm tractor maker in Indiana is illustrated in the accom- panying views. The three fundamental principles incorporated in the method include oil for a cooling medium; a centrifugal pump for circulating it, and a circula- tion of air in the radiator caused by induced or artificial draft secured by leading the exhaust gases of the engine into the top of the radiator. As shown in the picture of the farm tractor, the radiator is a box-like structure with an open, chimney-like top and an open bottom. The coils through which the oil is circulated are placed vertically inside of the outer box and extend from the bottom to about three- quarters of the way to the top, where the box tapers off into a chimney. As may be clearly seen in the cross- sectional view of the radiator, the exhaust gas from the engine is led to a point inside the outer box, near the top, whence it exhausts vertically out through the chimney from a three- mouthed pipe fitting. This action draws cool air up from the open bottom of the box and over the outside of the coils containing the oil. A Universal Automobile CHICAGO manufacturer has devised a_ universal joint socket wrench provided ‘with different sockets so that one wrench can be used for every nut on an automobile, (The wrench itself and its appli- cation on nuts otherwise hard to get at is shown in the accom- panying view. The- wrench consists. of an ‘outer tube with a curved nose at the bottom, an inner shaft and socket holder, a set of dif- ferent sizes of sockets and a bar handle. The outer tube is coarse- © ly knurled to give a firm grip 'that prevents slipping even in oily hands. The curved nose This wrench removes the engine bolts in half the time it takes an ordinary wrench to do it The hot oil from the top of the en- gine cylinders is led to the top of the coils inside the box and passes down inside the coils to the bottom where it passes through a centrifugal pump which forces it back to the bottom of the cylinder jackets, up through the jackets and back to the top of the coils, thereby completing cne cycle. In passing through the coils the oil is cooled by the cold air passing upward outside of the coils to the chimney. The diagram shows how the temper- ature of the oil is automatically regu- lated. As the engine load increases or decreases the speed of the exhaust — gases also varies in the same pro- portion. The amount of air that is sucked through the radiator is regu- lated by the speed of the gases and the cooling system is thus self-adjusting. Wrench permits the use of the wrench to get at the nuts located at inaccessible points. The inner driving shaft is propelled or turned by the use of a solid round bar handle that slides back and forth so that it may pass obstruc- tions and make a complete turn on the nut. The handle is pre- vented from falling out by a ball ‘and spring in the handle cap which presses against the handle and creates enough friction to make the handle stay in place. The inner drive shaft and socket holder rest upon machined bear- ings inside the handle so that a smooth running wrench without friction is issured. . _ iH -. { — bis if cad =
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ne en- of the down rere it pump om 9f th the Coils, is pre- y a ball lle cap handle tion to | place. socket d bear- that a vithout ‘Distill Your Own Water, Garageman NSTEAD of buying distilled water at twenty-five cents a bottle for filling storage batteries in automobiles, the garageman can distill his own water for about two cents a gallon by using the air- cooled still shown in exterior and cross- sectional views. The still consists of but two parts, the boiler and the condenser. The interior of both is coated with pure tin on a copper base wherever the water touches. The boiler has a capacity of two gallons and may be filled while the ; still is in operation. This is a prohibi- tion still. It pro- vides pure water for storage batteries at a cost of about two cents a gallon and is exceedingly easy to operate The cone-topped condenser, which fits tightly over the boiler, collects the distilled water and conducts it to an outside container. The device is set on a gas or kerosene stove, the heat being regulated so that the water just simmers. New Type of Holder for Repairing Radiators O make the use of a second man unnecessary in repair ing radiators A. L. W. Omacht, of Cresco, Iowa, has invented and patented the holder shown in the Compressed air takes the place of hand-power in this grease gun. The gun is in the form of a brass cylinder one foot long and two inches in diameter, and holds sixteen ounces of grease Squirt Grease with Compressed Air HE latest thing in grease guns for the automobilist is one which is operated by compressed air supplied through a tube connecting the gun with the engine or foot tire pump or an inflated tire carried as a spare. In operation, the gun is first filled with grease by hand. The tube is next attached and pressure on a small button admits the air into the inside of the cylinder. The grease is forced out until the button is released. A safety-valve in the cylinder plunger or piston prevents the air backing up‘and bursting the tire pump. A release hole in aecompanying views. It is a fork-shaped apparatus made of small pipes. The handle is held flat on the workbench by two clamps which permit the pipe to be turned around its own axis, and held in position by a thumbscrew. The prongs have hol- low threaded members at their ends through which are inserted bolts fitted with the radiator casing the cylinder barrel lets the air out from behind the piston so that grease will not be pushed out of the gun when it is idle. The cylin- der is one foot in length and two inches in diameter, They Tour in Their Own “Pullman” clamps and held in position with thumbscrews. Ad- justable jaw clamps, manipulated by 4 other thumbscrews, provide for the vary- ing thickness of the radiator: Thus held the radiator may be turned to any angle that may bedesired. A brilliant de- scendant of the The most awkward thing under the sun to clamp is the automobile radiator when it is being repaired. Here’s how one man did i ERE is a hotel on wheels. In it Mr. C. G. Barley, president of an Indiana truck company, is making a four thousand mile tour. It is complete to the last detail. There are sleeping compartments for four people, with glass windows that can be raised or lowered. Beneath each sleeping compartment is a com- modious chest for clothing. The driver sleeps on a specially devised seat which can be turned into a bunk at night. At the rear of the body is a com- plete kitchenequipment. Thetruck has water tanks, pumps, and modern plumbing. good lighting ystem furnishes twenty-five electric lights. Compartments on the outside contain tools, ropes, and various other equip- ment. A motor-cycle is carried for special errands. ‘There is also a large tent fly. on a two ton heavy truck chassis, the frame having been lengthened to meet the body re- This unique body is mounted Prairie schooner is this motor truck equipped like a modern house quirements. im | \ BOILER all a “FILLER SPOUT lg pward \ emper- = \ SLEEVES | | h clamp CLAMP) We » inner Ss
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A new outdoor sport for those who are zich in leisure Fishing for Money on Broadway The man who dis- covered. nitroglycerine never dreamed that he was advancing the art of safe-blowing. Nor did the originator of chewing gum suspect that his product, prop- erly masticated, would help pick up money from inaccessible places In Europe the petty thieves use flypaper at the end of a string to rob the poor-boxes. In America idle young men use a magnet on a line, or chewing gum on a pole to. pick _up articles which the magnet will not attract Did you ever drop your keys or your pocket-knife or your car fare down a grating in the sidewalk? There are people who find it worth while to fish up with magnets and chewing gum the little trinkets that we so carelessly let fall Chewing gum and magnets are recommended as bait Here is the coin safely stuck to the pole by a piece of innocent chew- ing gum. Andoncewe. heard of a man who cheated the gas com- pany out of lots of money by tangling up the works of the meter with a generous piece of carefully-chewed gum Here is one day’s catch’ — five pen- knives, a fountain pen, keys, a nail file, scis- sors, a cigarette holder and last but not least, a. pretty good haul of cold hard cash. Thus patience if not vir- tue receives its reward : — | — |) — | | j
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DNS From left to right—bridegroom, bride, best man; in the background, the airplane. The bride is bcing buttoned into her flying coat As soon as one “‘sky-pilot”’ gets through with them, another will fly off with them; so goes the modern honeymoon And So They Were Married Even if you don’t believe that. mar- rlages are made above you must admit that honeymoons are spent there Photographs © Press Illustrating Service Tying the old shoes and tin cans to the rear axle; but this sort of emblem really does not suffice on an airplane, since there is nothing for the tin cans to rattle and bang against This fearless, daredevil bride calmly read a book on the first lap of her airy honeymoon The bride climbed in first —affording an excellent chance to the rice-holders and confetti -throwers— with just as much com- posure as if she were enter- ing her own automobile They made a trip of two hundred miles in two hours and a half— over a mile a minute ire ‘
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Although it is not the coming ‘Ford of the Air,” this queer airplane of before-the-war days has a very interesting history Showing That It Is Not Only Aviators Who Fall : HE Ford of the air.’’ That is how several New York newspapers and at least one of our contemporaries presented the accompanying picture to their readers as the latest thing in airplanes. The mistake is so ludicrous that we may be pardoned a good-natured chuckle. Two looks should have disclosed the hoax. The pronounced concavity of the wings, the exposed wheel spokes, the exuberant framing, the puny motor, and the lengthy tail surface would reveal the machine to the experienced eye as a pre-war product, even if its family tree were not known. But it is the family tree that lends piquancy to the case, for the machine is one of the only two types ever originated by the Germans, and the pilot is Hans Grade, the inventor, himself. Even this type is an imitation of Santos-Dumont’s “Demoiselle,” the notorious pigmy machine that even Roland Garros found it hard to fly in exhibitions. The “Grade,” on the contrary, was relatively very serviceable and comparatively cheap. Its principal fault was the air- cooled motor, which cut short most flights although it did not prevent Grade from winning a prize by flying from Munich to Berlin. The antiquated Grade will not, for many reasons, become the “Ford of the air.”’ The little Gallaudet. ‘‘fly- about,” seen at last win- ter’s aero show, comes much nearer embodying features of the coming “Ford of the air,’”’ which may turn out to be indeed a monoplane. The editors who “fell for’’ the Grade as a modern airplane displayed what is unfortunately a common shortness of memory about such things. When Santos- Dumont, in 1901, won a prize for a round trip in a motor-driven balloon, he How He Irons His Prints | HEN a man takes to ironing, he is usually trying to cut down his tailor bill. But such is not the cage f the man shown in the picture below. He igs mountin, photographs, and he is using an electric iron to furnish a heat necessary. 2 The method he uses is a very good one. _ First he Places the mounting card face up on the ironing board. Next he puts on the card a piece of gray mounting tissue which is just the size of the photograph. Then comes the photo- graph, face up. He covers it all with a dry cloth and be- gins to iron. The heat melts the adhesive of the mount. ing tissue and the photograph sticks fast.“ The work pa be done very re idly by thisme: h. od of mounting, which will be especially appre- ciated by those amateurs who take pride in pre. serving a perfect record of their work, He is ironing a pho tograph to a mount. ing card; between the two there is g piece of mounting tissue which will melt, and hold them Suppose that Alcock Had Had This Airplane! AZE upon this picture of Harry van Wie’s trans- Pacific ‘‘parasol plane.’’ Harry is a plumber who lives in San Francisco, and his machine is exactly the kind that we would expect a plumber without aerodynamical knowledge to construct. The plumbing business must be good in San Francisco, for Harry has embodied in his wild invention several thousand dollars’ worth of his expensive material. : Harry ought to read a few elementary books on flying. He would then learn that his extraordinary contrivance is never likely to leave the ground. It took the pioneers of aviation years to learn that, if an airplane is to fly, it must have wings that are wide in span and shallow in depth. designers call. it, is all- important, for the lead- ing edge rather than the trailing edge does most of the work of lifting. Langley proved all this experimentally years and years ago. But Harry cares nothing at all about this. His was acclaimed the ‘‘inven- tor of the dirigible,”’ few re- calling that sixteen years earlier Rénard and Krebs had made a round trip ina better dirigible, attaining a higher speed, relatively, with eight horsepower than Santos-Dumont did with over twice that amount. Before the Wright brothers leaped into the air in - a correctly designed airplane, such vagaries as this were common enough. But that any one should to- day so ignore the elementary principles of correct flying-machine construction shows that we have not yet outlived the day of the astrologer, the perpetual- motion fiend, and the circle-squaring monomaniac machine is all depth and little span. His parasol, which is intended to act as a parachute—if the ma- chine should ever get into the air and find itself in distress—is probably the worst lifting surface that could possibly have been selected. The “leading edge,’’ as = teri sti be fo th al ce | t | | t] t] i i | 4 | | } — |
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e e Entangling a River Park Your Car, Sir? - ams have a tendency to eat their Pay into their banks at some places and to deposit sand, mud or other floatable ma- teri ther places. of the country spend enormous sums every year for the protection of their property against this destructive power, and in many instances the engineers have found it extremely difficult to control and regulate the channels of the streams. A new method of pro- tection, recently developed in Kansas and used with remark- able success for regulating the Kansas River, has attracted un- usual attention in engineering circles. The means employed are extremely simple and the cost of using the new method is ridiculously small compared with the cost of other methods hereto- fore employed. At points where it is necessary to prevent the water from eating away the river banks, steel jetties are placed at right angles to the course of \ the stream. These jetties consist of \ units, each composed of three structural steel angles, sixteen feet long and fastened together in the middle to form what might be called a giant jack. Two of the steel angles form a cross and the third is at right angles to a strap and miss it! While ycu are apologizing on your way back to a stand- ing position, you. think longingly of your comfortable car idling its time away in the garage. Oh, for a park- ing place near your off ce! : Why not have them? says Mr. F. W. Fitzpatrick, the well-known architect. His plan for parking space is this: Use the cellars and roofs of offce buildings wher- ever possible; in other places build elevated platforms on side streets. - The cellars will be reached by inclines or elevators. The roofs will be covered over to protect cars from sun and rain. The side street platforms will be supported by columns like those used for elevated railroads. An elevator will carry the cars up. Thus traffic on the street below will not be obstructed. A turn- table on the platform will facilitate putting the cars in their places. Andsothetime-worn jokeaboutstow- ing the lil’ old Ford in the attic for the winter isn’t really so absurd after all. Eventually you may step from your office, somewhere up near the sky, directly into your limousine. And your dinner guests will drive is steel jett z the plane of the cross. The ends of the angles rie ghee a > liga ace ee right up to the door of your top-floor apartment. are fastened one to another with half-inch wire breaking the force of the water and causing it to cable. deposit some of the sand | Y Z oa Lil Several of these big jacks, usually four of and mud: it carries SIDEWALK them, are placed in the stream and anchored / AUTO SPACES. _, ——— GIRDERS, to the shore. In a remarkably short timea wets 1 deposit of sand or mud will be formed below the obstacle and the water ceases eating away the banks at that point. below: the and ELEVATOR == = GUIDES Jetties of this sort would be especially ser- the posts to hold the so pees viceable to farmers whose fields lie in the river platform are the only REPAIRSp Fr pt eh EY parts of it that extend flats or to owners of riverside real estate, for wherever there are water-courses man must ‘ SIDEWALK ; wage a continuous war to protect his land and the property on it from encroachment. Cars parked here! Mr. Fitzpatrick would have park. ing platforms like this one built at regular intervals throughout the business sections of all large cities Wherever possible subterranean parking places would _ be best in order to save space; inclines or eleva- tors would be installed to carry the cars down train jerks forward; you grab dee e of = Ang the ig | he h ig 0to- Int- Can Pi h- . ing, i] be pre- 10se | vho ore- fect Leir a unt. Is ting will nem ns- ig yho ind ust in a } ng. 1ce ive | the ars ' ne | 3 at | :
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Helping Budding Virtuosos NLY four notes of the musical scale, G, D, A and E, can be produced on the violin without fingering. All other notes within the range of the instrument are produced by short- ening the vibrating length of the correspond- ing string by pressing it with the finger tip against the finger board at certain points. To make it easier for the beginner to learn the exact positions of these points a special finger board attachment has been invented. Rounding Up the Elephants HAT’S all the excitement about? Why these spears pointed ferociously at nothing but trees and shrubs? these natives hear a thunderous trumpeting coming nearer and nearer. An elephant round-up is in progress and the elephants are fast approaching the fence. Though it is heavily built, it may How to Fight. a Burglar F you own eno money and jewe tempt burglars, outfit like the one shown here. The shield ig col- lapsible and may } slipped inside your bu- reau drawer when not in use. The weapon ig g combination dagger and gun to suit your indi. vidual taste. Thompson Rogers, who invented these things, is shown here using them. He has also invented a dag- ger with three blades, go that you canstab in direction without even turning your wrist Spotting Outlaw Cotton Fields AKING its cue from Mexican bandits, no doubt, anyway with true outlaw instincts, the pink boll- worm crossed the border, invaded the United States, and did great damage to the cottonfields near by. In order to prevent its spread, large areas were quaran- tined and a law was enacted which forbade the planting of cotton in these districts. Many farmers could not see the wisdom of this move and they secretly planted cotton fields in un- frequented districts hemmed in by forests. These fields were almost impossible to find until airplanes ee joined the hunt. The white cake. The Hillside Document Vault when seen from above, stood out against the dull green of the trees, and a few airplane pictures were tors. enough to put the government men on the trail. One of these airplane pictures is shown above. O, the man in the picture below is not coming out of the vault of his ances- This vault is not for dead ones but documents. It stands all by itself on a hillside, is made of reinforced concrete and, what is most important of all, is absolutely fireproof. The United States Reclamation department built it and keeps in it all not be strong enough to withstand the fleeing animals. The records of the various reclamation jobs as they progress. M-ny spears, after all, are necessary to make safety absolutely sure. firms have adopted the idea, so don’t be alarmed should you chance In our country elephants are found chiefly in circuses and zoos; _to run across one of these formidable vaults in the course of a but in their native lands, Asia and Africa, they are put to work. Sunday stroll around the outskirts of the city. © Publishers’ Photo Service : 3 7 ? | | | | t — i < — :
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€ Publishers’ Photo Service Three Black Men; See How They Climb | the coconut tree shown herewith does not like to live in Cey- lon, for it is stretching out its branches as far as it can over the water toward India. That’s all very well for the tree but it is eoconut most inconvenient for the gatherers, as our illustration surely shows. Three black men. have started out on the limb; the farther out they go the closer they hug it—but you can’t blame them. What will they do when they reach the end of the branch and are forced to take on extra baggage in the shape of five or six coconuts apiece? Perhaps this time they will throw them back to shore rather than run the risk of falling from their precarious path. Coconut trees flourish best along the sea shore; they thrive particularly well on the islands ~ of the West Indies, but will grow in practically “any tropical country. Papers Sold Like Gum UT in a cent, pull a lever; that’s how you get your chewing gum. And now the same method is used in Phila- delphia for selling newspapers. You drop in tw2 cents, pull the lever and hold your hand out for the “Public Ledger.” Twenty-five of these vending machines have been put into vperation already; but the “‘Pub- lie Ledger” will not stop at that small number. It plans to have tive thousand of them before long—allowing five hundred for Camden and another five hundred for Atlantic City. As each edi- on comes from the press, the earlier papers will be removed ‘rom the machines and the later nes will be put in. The small glass window near _the top of the machine will tell you whether there are any papers inside and just what edition they belong to. A cent and a dime are the only coins that fit in the slot. The dime will be returned in the tray below. but the cleaner. A Hard Life While It Lasts Dow’ came the gang-plank and out stepped the dog when the stupid journey was over. It was really very stupid, says the dog, for there was nothing but four black walls for him to look at. At least he was comfortable; he rested on the shorn locks of some unfortunate poodle dog—an excellent example of robbing Peter to pay Paul. As to whether Paul is worth it, judge for yourself. To our way of thinking, he is very unattractive. His bald head makes his ears stand out. His eyes are too large and his skin doesn’t fit. The locket he wears around his neck does not improve him. But he faces the world with a wide-awake, inquiring look. Perhaps, efter all, Paul is looking for Peter with some idea of rewarding him for the luxurious woolly rug. © Ledger Photo Service © International Film Service Sucking Up the Sediment in the Swimming Pool ‘THAT’S ‘he fishing for? Dirt; evi- dence forces us to admit that we do pollute the waters of a swimming pool when we enter therein. our suits and the hair from our heads, are the chief offenders. The part of his fishing pole that is above water looks like an ordinary pole, The dye from remainder, which is under water, looks very much like the end of a vacuum In fact, the “‘impurity extrac- tor,’’ as it is called, is a vacuum cleaner. There is a revolving brush in the end of the instru- ment for collecting sediment from the bottom and sides of the pool. The material thus sucked up passes out through a hose connected with the drain. It is actuated by a centrifugal pump. As the pole hits the water it seems to bend, though in reality it is straight. This is due to refraction, a phenomenon which results from the water being denser than air. Fashion Note Now that collars are selling for thirty-five cents straight the men of collar-wearing lands might find it worth their while to adopt the prevalent style among Burmese women of the Padung tribe. The Burmese girl’s collar, made of brass rings, should be durable, and require practically no attention from the laundry, and by adding or dropping a ring or two it wouid always be in the prevailing style. Of. course it would not be the ideal of com- fort, but what stiff collar is? We do not even pause for an answer. The amiable-looking debutante in our picture wears her collar not for decoration but as a neck stretcher, beauty among the Pa- dungs being measured by the length of the neck. She began adding a ring to her collar every little while. when she was very young until now that she is fifteen and ready to go into society her neck is nearly-a foot long. She is therefore a rare beauty. it 4 iz ult not nces on a yer utely t all — a # 4 ieee
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Teeth-Pulling Made Painless by Electricity F you ever had a tooth pulled by one of those callous dental practi- tioners who sometimes masquerade under the guise of “‘painless dentist’’ you will be interested in the method invented by a man in New Jersey for making dentistry painless—not for the dentist but for the patient— by the use of electricity. The use of electricity for producing analgesia, or absence of pain, is not altogether new. The method has been em- ployed occasionally with varying success, but has not become very popular because its effects were too uncertain. If the current is too weak, or otherwise of unsuitable character, it does not remove the pain; if too strong or of too low frequency the application of the current itself causes pain and dis- comfort. The inventor of the new method illustrated here, employs an alternat- ing current of fairly high frequency. An alternating current passing through the jaw makes the nerves of the teeth insensible He finds that these waves, at a frequency of 1000 to 2000 cycles a second, give the best results. They cause no shock or other disagreeable sensation. the current is applied there is no pain. So long as The current may be applied in many different ways, as best suited to each individual case. The success will depend in a large measure upon the ingenuity of the operator in applying the current in the most effective manner. Where the invention is used to produce analgesia in the teeth the current should be applied to the nerve or nerves which supply’ the tooth or the teeth to be operated on. One electrode is applied either to the gum around the root of the diseased tooth, or to the outer skin, as near as possible to the spot where the nerve is close to the surface. The other electrode may be placed in contact with any part of the patient’s body at some distance from the teeth. We depict in our illustration one method of applying the current. A Drying Reel to Saye our Lines A, CALIFORNIAN disciple of Izaak Walton has inventeg a contrivance for drying fishing lines which is extremely simple of con- struction. It consists of a reg} about a foot in diameter and from twelve to eighteen inches long which rests upon wooden supports and may be revolved by means of a crank attached to one end of the supporting shaft of the drum. The drum of the reel is made of two wooden disks, about twelve inches in diameter and one inch thick, to which thin wooden strips of the required length are nailed. To dry your line unwind it from your reel on to the drying reel and leave it His Tool-Chest Is a Workbench Too MINNESOTA inventor, Andrew Anderson of Crookston, Minn., ’ has devised a portable tool-chest which also serves as a workbench. It con- sists of two. parts which can be hinged together, side by side or back to back. If the chest is to be used as a work- bench, the two parts, securely fastened together, are raised to the proper height by foldable, firmly braced sup- ports. These legs m are hinged to the body of the we chest and give sufficient stability to the bench for any ordinary work, like sawing, planing or sandpapering. One of the parts has two large drawers for saws, planes, and other large tools. The other has_ three drawers for smaller tools, sandpaper, and light hardware, including screws, nails, brads, hinges, staples, etc. For convenience in transportation the two parts of the chest are fastened together face to face by an ingenious arrangement of clips and bolts, and secured by a strong lock. We are all of us quite accustomed to the sight of a carpenter carrying his tools in bundle or bag, but a carpenter carrying his bench will certainly be something new on the horizon. It should prove a great con- venience to the rural carpenter who must move about from place to place, © often handicapped for lack of a proper bench. “as The two halves are fastened side by side and raised by convenient folding legs Folded, the tool - chest forms a box with handles A removable bench-vise, fastened to the folding top of the bench, will hold objects as large as a door Ae . of :
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- demonstrated its efficiency Why Waste Lumber in Greenhouses HE hot and moist air in greenhouses is ex- ceedingly detrimental to the wood benches, racks and supports. It favors the growth and development of the -microscopic fungi and other microorganisms which cause decay. Why not employ some other material, less perishable than wood but equally strong, instead of the wooden posts and planks, thought Fred J. Mead of Newark, N. J. He decided that concrete would be just the thing, and after a little experi- menting he succeeded in fashioning for his green- house a complete equipment of benches from re- inforced concrete. In molds made by himself, with little difficulty he cast short posts, cross-pieces, floor-beams and side wall-pieces. The cross-beams were made so as to mortise with the tops of the posts which supported the weight of the concrete bench. The wall-pieces and the floor-beams were made of the same length and were placed in their proper position on the cross-beams, forming a strong structure, proof against decay. Aid for the Farmer in the Corn-F ECENTLY a two-row cultivator, the distance between the plants. . . which can either be drawn by Hence, it is evident that the opera- ae ) horses or propeiled by a gasoline en- tor, in order to avoid plowing out the gine, has been developed and gives eorn, must run his cultivator over the promise of becoming an important fac- two rows that were planted at the tor in the economic development of the same time. American corn belt. vator is still in the experi- mental stage, but the tests which have been made by the University of Illinois and the -Macon County (I.) Farm Bureau have under unfavorable condi- tions. A farmer who owns one of | these new two-row cultiva- tors can do with three horses almost as much work as two men and four horses do with the old single row cultivator. The machine works on the same principle as the old type, but the two gangs of shovels which work A greenhouse bench of reinforced concrete can be made by any gardener of ordinary skill and equipped with the simplest household tools. It will last practically forever The new culti- the shovels can be adjusted to equal tective helmets. able length of time. recent invention. ,HEAD PROTECTION ADJUSTING BUCKLE FABRIC BAND This new helmet is light, yet gives ample protection in electric welding. It tilts back like a sun-bonnet ield The distance between on either side of a row stay at a fixed distance from each other, a distance equal to This farmer is cultivating corn with a two-row motor cultivator. The daisy-like wheels are rotating guards protecting the plants from the dirt thrown up by the shovels the Welder’s Head HE necessity of protecting the head and neck of the workman from sparks and small particles of metal while he is welding with the oxy-acetylene flame or the electric arc, led to the invention of numerous types of pro- Some of these, which were light enough not to overburden the worker, did not afford sufficient pro- tection, while others afforded ample protection but were entirely too heavy to be worn with comfort for any consider- The helmet shown in the accompanying illustration is a It weighs only twenty-one and one half ounces, yet it protects the entire face, head and neck of the operator. The metal hood, which has a large window in front, is pivoted on both sides of the head, above the ears of the operator, to a leather and fabric band which is placed around the head of the worker and adjusted by a sliding buckle. The metal of the hel- met does not touch the skin of the face or neck at any point. It is supported only by th e head-bandtowhich it is pivoted. When it is in use during the welding, the lower edge of the helmet rests against the chest of the operator. Swung back on its hinges, it has the appearance of a sun-bonnet and causes no discomfort. One of the new two-row cultivators drawn by three horses and doing the work of two men and four horses that between the rows. The self-propelled cultivators are equipped with four- or six- cylinder gasoline engines. Under fairly good condi- tions fifteen to twenty acres a day can be cultivated with one of these new cultivators, either horse-drawn or engine- propelled. This means an increase in working efficien- cy of seventy-five per cent— an important item in view of the fact that the cultiva- tion of the fields is one of the costliest operations in the production of our great- est grain crop. trips 7, q | and i ving 3 | q | ig q i 7 | | | ig
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© Underwood & Underwood Two fat and healthy orphans the * Bide-a-wee’’ home collecting contributions j at a charity dog show The seat was built just for him, that he might have his “A Dog’s Life”—So This Is It _ But not as Charlie Chaplin knew it There are some vain and foolish dogs that dress in the latest style, whether it is becoming or not A daily outing with- aug out exerting himself Tea for three—the three being the pampered puppies of the rich Right: With individ- ual dishes there is no chance of these dogs indulging in vulgar arguments and habits J © Underwood & Underwood This pretty, pampered poodle has a boudoir all his own; yes, it is a he, and, what is worse, they have named him “J. Pierpont Morgan.” He has just waked up from a calm and peaceful _ sleep; presently his nurse will come, wash his face, carry him over to the dressing-table, and proceed to comb his hair © International Film Service Compared with his frivolous neighbor, we welcome this “‘yel- low pup,” stoically patient while a nurse treats his injured paw. With new clinics and homes for stray dogs constantly springing up, the tramp that sleeps on park benches on cold winter nights must fervently wish that he were a dog x
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Here are George and Tom Susson. Tom joined the family fourteen years ago, just before Christmas. His graceful waddle and charm- ing ways made him a family ° pet instead of Christmas meat ‘“Idelio” weighs four ounces At least one ounce is concentrated in his tail. Would you pay five hundred dollars for a monkey’s tail? and is worth $2,000 ! A Daniel— yes, a second Daniel—and he’s shown just - below. At the end of the chain that he holds, stalks his pet lion. And his name, alas, is not Daniel but Sergeant G. W. Reed. The cub is growing fast, and wé greatly fear that when he realizes his strength he will refuse to trot at the end of a chain. Besides, what modern land- lord would have a lion in his house? Even the mildest landlord turns down babies No work, all play; plenty of food, few clothes, and petting “Nobody can get my goat,” says Betty Ov- erand, and so does Marie Berendson; you might say that nobody would want to; but you never can be sure that a fad won’t spread in New York city, the address of ‘‘Toto” and “Charlotte” © Kadel & Herbert “The salt of the sea for me,” says this bear cub, mascot of the U.S. S. Texas. We don’t know whether he is sniffing the briny air or trying to take sights , but, at any rate, it is plain that he is quite at home on the bounding main The course of true love never runs smooth, so we have long been told. As proof of this age-old bit of wisdom we offer this boxing match—no, it is not a prize fight—below. Miss Valentine Grant loves her kangaroo and yet she fights him; but she is sure to win, for her arms are much longer than his. Ah, but after the match is over she feeds him sugar and fondles him. You see, he really is her chief source of support if 4 x ou e vvere a Nangaroo i ite het id | “yy ‘ty Va : 4 ig =
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SUPERSHEATER CLEANER. HAL PARTIAL ROTATION. ONG Science Applied to Wedding Rings * ITH this ring I thee wed,” said he, w slipped it on her finger. Did it ft? Cane for he had measured her finger beforehand with the finger measurer shown herewith. It was invented 1 Julius Dinhofer of New York City. by It consists of a long narrow strip of celluloid, with a slit in one end through which the cther end may pass. A is printed along the edge. You slip the end through the slit and adjust it on your finger. The scale on the edge will tell you. your size. Surely a device like this is much better than the _ hazard string method of measuring which often results in your having to wear an ugly wad of thread on your ring iCLEANERS AND This boiler installation has seven cleaner units in all: six for the boiler tubes and one for the superheater tubes at the top The picture at the right shows the new method of cleaning boiler tubes by blowing steam be- tween instead of di- rectly against them -How to Clean Boiler Tubes FTER a certain time, the duration of which depends upon the completeness of combustion in the fire-box, the tubes of a boiler become coated with a layer of soot. But soot is a poor conductor of heat and prevents the tubes from becoming hot. Hence a considerable proportion of the heat is wasted, and at the present high price of coal this means a serious loss. ; To avoid such waste, the pipes of every boiler must be cleaned from. time to time. For- First the finger measurer and then the ring; it is sure to be a perfect fit Curbing the Gas Generator HE generators formerly used for making acetylene gas were, as a rule, unsatisfactory because the generatior of the gas did not cease even after the light had been shut off, on account of the continued presence of water in the flat-bottomed trays containing the carbide. These defects are eliminated in a new generator, the car bide container of which is shown in the accompanying picture. The support of the pockets of perforated metal, merly they were cleaned by scrap- ing them with long-handled steel brushes or scrapers. ~ Later a crude method of removing the soot by steam was introduced which was soon supplanted by the installation in boilers of permanent pipes through which steam could be forced into the space around the tubes. In the newest method, illustrated by the accompanying pictures, in- stead of blowing the steam directly against the tubes it is blown be- tween the pipes. The cleaning pipes may be revolved in a semi- circle so as to give the steam free play against all sides of the tubes. The power of the steam jets is suf- ficient to remove the soot from the most distant parts of the tubes. This obviates the necessity of mounting a cleaner unit at the bottom for the lowertubes. Pipes which contain the carbide, consists of two metal plates which inter sect each other at right angles, forming, in cross section, a right angle cross with arms of the same length. The pockets for the car bide are made from triangular shaped pieces of perforated metal, set in the segmental spaces between the intersecting plates, and forma spiral around the vertical axis formed by the line of intersection. The water poured into the cylinder surrounding the container frame first comes in contact with the car- bide in the lowest pocket. After this is used up, the water reaches tke next higher pocket in the ad- joining segment and so on until the carbide in the highest of the pockets has been decomposed. If at any time the light is shut off, the pres sure of the gas in the tightly closed generator forces the water back and so placed would soon be destroyed by the terrific heat. This picture shows cleerly the pockets for the car- bide placed in the angles of the intersecting plates out of the tube through which it entered, hence stopping the furthe generation of gas. tiv J cul po me sui 4 fol . er) co TUBE | | th
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Wind Tricks the Skyscrapers Play The weather man finds out why your hat blows off at the Times Building VERY one has had a hat blown E off by some flurry of wind in the streets swooping down at an un- ted angle. The street corners, ond particularly the tall buildings of our cities, develop miniature. wind- storms in astonishing variety. % There are air rapids, typhoons, tornadoes, chinook winds and other air phenomena well worth observation. When the wind rush- ing up two streets con- verges at a corner the air currents are sudden- ly compressed, and their velocity is greatly in- creased. The wind may be said to split on the corner of the building in its path, but the pressure is not exerted, as one would suppose, against the corner of the wall, but at a point severai feet in front of it. There is a compara- tively dead space just before the corner where a sheet of paper may fall to the ground. A secondary air current is sometimes set up in the op- posite direction. Watch the move- ment of leaves or pieces of paper about such corners and see for yourself. Dangers of City Canons The very deep and narrow canons formed by the skyscrapers in our mod- ern cities develop remarkable air phenomena. Let several air currents converge in one of our modern streets and the velocity often becomes danger- ous. To understand these miniature wind-storms it should be born in mind that converging winds tend to develop a steady stream of air which increases in velocity, while diverging currents are soon cut into so-called ‘driven eddies” which dispel the force. When two or more air currents join, the wind tends to run to a peak and the greatest pressure is exerted at its apex. Some interesting tests of the force of these accelerated air currents have been made by Mr. James N. Scarr, the district forecaster of the Weather Bureau in New York. It has been found that the highest velocity of any wind sweeping over New York in past years has been ninety-six miles an hour. This observation was made at the Weather Bureau station, which is situated 454 feet above the level of the streets. A wind of half this velocity, however, is considered high, and, when drawn down into the narrow streets between the continuous rows of skyscrapers, its velocity is often greatly accelerated. A casual observer is often surprised at.the force with which an air current of low velocity will suddenly leap up the side of a high building. Ona com- paratively quiet day such a current Beware a flatiron corner on a gusty day when several streams of wind “‘pile up” and under pressure from the rear shoot suddenly upward in the vicinity of a high building will often carry a hat or a sheet of news- paper straight upward to a height of several stories. The scientific explana- tion is very simple. The barometric pressure is somewhat less at the top of the building than at its foot. Now, when a current of air strikes the smooth side of a high building it naturally seeks to escape along the line of least resistance. The decreasing air pres- sure tends to draw the air upward and as it moves its velocity rapidly in- creases. What Happens on a Hot Day Again the wall of a high building will often develop strong air currents on otherwise perfectly quiet days. When the sun beats on a building perhaps 300 or 400 feet in height, a considerable amount of heat is stored up. The air in this heated area naturally has a tendency to rise. It has been found that a current of rising air tends to increase in temperature. To be exact it rises one degree in going up 183 feet. If the building is 400 feet or more in height it may thus gain several degrees in its upward progress. Moreover, the decreasing air pressure still further accelerates this movement. This phenomena is common in many mountain regions where the heat ac- cumulates against high precipitous walls of rock. In the Rocky Moun- tains the air currents thus developed -new force. are called the chinook winds and on the Italian slopes of the Alps, the foehn winds. The chinook winds or currents developed in our modern cities naturally rise but a few degrees above the normal temperature, but this is often sufficient to create a strong upward draft in our streets. On reaching the roofs of the high buildings they tend to slip over the top and déscend into the next street. The tendency of the air to spill around the sides of high buildings _serves to develop many interesting air phenom- ena. A steady current of air striking against a smooth surface will tend to travel in- definitely upward. On arriving at the top, as we have said, it is likely to spill over and flow down on the other side. In case the space on the opposite side of the building be large and free from obstacles, the currents are sometimes drawn down to the level of the street, with scarcely diminished force. Beware of Corner Currents The direction of a current is influ- enced by the angle at which it strikes against a vertical surface. If the wind _is prevented from flowing upward it will bound off the side of a building at an unexpected angle. When the wind blows steadily against such a surface the force of the impact is in- creased and the wind, in escaping, gains If the air current escapes down some side street its speed is likely to be far greater than that of the original current. It often happens that the force of this current will be felt a block -away when the air is comparatively quiet. This phenomenon explains the dangerous air currents which prevail at many windy corners. A corner at the side of a public park or other open space often becomes a menace to life and limb for this reason. Several air currents are piled up in this corner which have gained velocity in crossing an open space. The streets at the intersection are their only avenue of escape and in converging to pass through these funnel-like apertures their velocity is immensely accelerated. In the midst of this turmoil dead pockets will be formed where an ob- server may stand in safety to watch the discomfiture of other pedestrians. il IN gs 1PON he tainly: ted by iH Scale the edge | | Sults in ur ring ig } r > Ne gas og ration in the inying metal, ynsists inter- ingles, same car gular- ig metal, tween orm ction. linder frame | e car After aches e ad- ‘il the ckets any pres- ; slosed k and ich i irther ig :
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Bringing the Stars the People It’s easy to get on familiar terms with other worlds at Clark Observatory By Henriette Boeckmann ROBABLY nowhere else in the P world is there another private observatory like that built by William A. Clark, Jr., son of former United States Senator Clark, on the beautiful grounds of his home in Los Angeles. Even as the POPULAR SCI- ENCE MONTHLY is written essentially for readers who are not scientists but interested in scientific matters, so the Clark Observatory is planned to popularize astronomy. Under the curatorship of Dr. Mars F. Baum- gardt, this unique institution has succeeded admirably in this original purpose of presenting astronomy in the simplest, clearest form. “They are too busy doing real work at the great observatories to bother with the public,” says Dr. Baumgardt, of the professional astronomers. “It is Mr. Clark’s intention as well as my own to let the public know a little about astronomy without being bored by reading a great many books.” A Universe of Radium Stars Overlooking the hedged lawns and the pools where waterlilies cast their reflections, rises the observatory tower, sixty feet high, and built of brick with its dome sky full of minutest stars twink- ling and twinkling, and a Milky Way that glowed and glowed. For years Dr. Baumgardt had thought and dreamed of an il- luminated map. Finally came the idea of employing radium. His first map, recently completed, will be worthy of a place in a museum as the initial step in this development of star maps which, while simple, are yet beyond description in charm and absorbing instruction. Making the Stars To make his stars, Dr. Baum- gardt uses radium bromide mixed with zine sulphide according to the degree of brilliancy of the star to be re- produced. This powder is sprinkled on sheet celluloid which has been painted with ether. The sprinkling is done in spots to minimize the waste of radium. Punches similar to those used by street-car conductors are employed in punching: the various sized disks required to represent the stars. At present Dr. Baumgardt has made only twenty-eight of these maps, Gravitation hurled this meteorite Straight d the United States. It struck us near 4 Diabolo, Ariz. Now it constitutes one of the items of interest in Mr. Clark’s observatory but when completed there will be de hundred and fifty-five. These will he lent to schools for study. The oh servatory itself is open to claggg of high school students, or others, } making arrangements with the curator Most fascinating, most stupendous, the fact that there, on night-black maps, the Lilliputian stars will twinkle on and on for at least 2,450 years, and the Milky Way will continue to glow for an equal length of time. a The Moon Modeled in Plaster In his ‘laboratory at home, Dr Baumgardt is making a large plaster of Paris model of the moon, made entirely of copper. Every foot of this tower is as stoutly built as modern architecture can make it. There are three floors and a vault chamber, with each floor given over to astro- nomical displays. But among all the treasures in the tower, none are more marvelous to the visitor than the star maps which are the in- vention of its curator. We had stepped out upon the balcony, ex- tending around the tower at the third fioor level, when Dr. Baumgardt handed us a map upon which seemed to gleam and twinkle a portion of the heavens we were gazing upon, only this was in extreme minia- ture. It was dramati- cally astonishing—so un- looked for, and seemingly so improbable to see therein our hands a map --6f a portion of the night Dr. Baumgardt has made models of the solar sys- tem. If you want to know where the sun, earth, moon and the planets are at any season of the year, a glance at one of the models tells you - By projecting lantem slides of the moon upon this globe with a stere opticon, absolute accu racy is obtained. Then, using well-known dental drills, he cuts out the contour of the moon—an enormous task sinee there are many hundreds of craters, not to mention the mountains and val- leys. With the aid of this illuminated by a power ful electric light, it will be possible to exhibit, the geographical details and of the lunar landscape nearly as it actually ap- _ pears. Dr. Baumgardt plans to make numerous regions, and then mount them in exhibition cham- bers down a hall. These birds, animals, etc., placed plaster of Paris moon, present the appearance . larger models of lunar moonscapes will be placed in proper set ting, just as stuffed in appropriate” 5 = | | } | | : | 2 | th d fe
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Dr. ster of 2 a | upon ‘ In his laboratory Dr. Baumgardt is making a large plaster model of the moon. By projecting lantern slides of the moon upon stere- this globe the mountains, valleys, and “‘seas” stand out in startling relief. To make his model, Dr. Baumgardt uses dental drills accu Then, setting in the Museum of Natural numerous photographic transparencies clusters, comets and great spiral sys- dental History in New York city. of astronomical subjects, which are il- tems—probably island universes. Dr. ut the On the first floor of the observatory luminated with.a bluish light, thereby Baumgardt absolutely believes in the noe are many photographs of various giving the natural appearance, as_ theory of distant island universes. since phenomena of our universe, such as_ seen through a telescope. Altogether five hundred photo- ndreds the solar eclipse, sun spots, star clus- This is an idea which Dr. Baumgardt graphs and eleven hundred lantern ention ters, meteors, etc. Here, too, isoneof worked out, and which astronomers _ slides, all relating to astronomical sub- 1d val- the largest meteorites west of Chicago. are much taken with. Very startling jects, belong to the Clark institution. It weighs 357 pounds and was found and realistic effects are thus obtained Many of the slides were made at this of this near Caiion Diabolo, Arizona. Be- in showing, for instance, nebulae, star observatory; here, also, are the best moon, . cause of the tremendous on works in slides from all power: velocity with which me- - the great observatories of it will teorites enter the earth’s the country. ibit, the atmosphere—the average In this vault chamber is ils and rate is from 10 to 40 miles a cell wherein the radium 2arance per second—only- about display is kept. It is a 1dscape one out of a hundred mil- brilliant display from a lly ap lion ever reaches earth. spectacular standpoint, and mgardt They are consumed by the molecular bombard- merous friction with the air at such ments are seen to wonder- f lunar a velocity. ful advantage. Some sense mount The visitor has no ink- of the power of radium, 1 cham- ling of a vault chamber most of which is procured These below the first floor until a in Colorado and Utah, is ll be trap door is raised and a grasped by the student‘or er set- tiny staircase leadin g visiting layman when he stuffed downward is revealed. In reads the following notes, te., = this vault chamber, eight The little ball dangling from the string represents the earth. which are placarded above ‘opriate” feet below the ground, are To the right is a model of Jupiter, to the left a model of Saturn the radioscopes: i i is, Be t im i | if val eon i ig a i
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“Radium is tormed by the breaking up of atoms of another element called uran- jum, but_radium shows this breaking up process in its own atoms more distinctly than does uranium or any other element we know, and it is this breaking up that gives radium its astonishing properties such as the production of heat, electricity and wave motions in the ether which are similar to the wave motions which produce the sensation of light to our eyes. “Tt has been calculated that in one gram of radium there is sufficient energy to lift a million tons through a height of 900 feet, or, in other words, 40 U. S. battleships, each weighing 25,000 tons, 900 feet into the air. years, as a minimum estimate, for the - radium to give off this amount of energy. “A most striking effect of the radio-active substances is the luminosity produced by the impact of the alpha rays on ascreen or mix- ture of phosphorescent zinc sulphide (Sidot’s hexagonal blend). These little atoms which are being discharged from the radium, are projected into space with a velocity of about 20,000 miles a second, and when one of the atoms comes into contact with a crystal of zinc sulphide with this enormous velocity, the result is a bluish flash of light. “The effect is a dancing light, a scintil- lating luminescence like a sky full of flash- ing stars. In this way the marvelous activ- ity of radium and the perpetual motion of atoms is actually made visible to our eyes. This giving off of energy goes on day after day, week after week, year after year, and century after century until at least 2,450 years have passed.” We proceed to the second floor. The diameter of the dome of the tower, which is 12 feet 5 inches, is used as the standard, and represents the sun. Suspended in the open square formed However, it takes at least 2,450- in the center of the room by the four steel girders that support the tele- scope on the floor above, are the eight planets, all made to scale with the circle of steel about the room which represents the sun and is the circum- ference of the dome above. The larger models are made of wood and the smaller of brass; all have been painted by Dr. Baumgardt in precisely the way the planets appea. through the tele- scope. On the platform beneath the planets is a planetarium. The posi- tions of the various planets about the sun are shown during each suc- ceeding week. On this floor, also, is a mechanism which shows the model of the moon, sun and earth in their revolutions about each other, and which is a superbly accurate machine. Getting the Best of Vibration Slipping out a door we wind upward on an iron staircase to the third and topmost floor where the 6-inch refract- ing telescope is equatorially mounted and equipped with every facility for astronomical observation and dis- covery. Many of the most important astronomical discoveries in the past have been made by a telescope of this size. The telescope stands on a struc- tural steel foundation embedded many feet below the ground in a concrete block 12 feet square. Nothing more than a bit of felt padding comes in contact with this supporting structure of the telescope, thereby eliminat- ing all vibration, although the cars run not two hundred feet au The observatory is also equippes with four portable telescopes; ait inch reflector, one 54-inch refractop and two 4-inch refractors. Thepage 2-inch twin objective glass, threa D ra binocular field glasses ranging frogs three to twelve power, a periesiil three stereopticons and one moving picture machine. Eighteen hun feet of moving-picture film delin the construction, transportation and the operation of the equipment of the Mount Wilson observatory located gp Mount Wilson in southern Califor and which is one of the two lar observatories in the world. Depictj the tides and the cause for their change, the eclipses of the sun and moon, comets moving about the guy etc., are 25 mechanical slides. The equipment of the observatory includes a library of over one hundred astro. nomical books of recent publication, and three hundred magazines, pamph. lets and other printed matter dealing with astronomy. Young William A. Clark III, a sty. dent of 17 at St. Pauls School, Concord, N. H., has one of the radium star maps made by Dr. Baumgardt, which arouses the most intense interest among his classmates. W. A. Clark, Jr., also keeps one of the star maps with him; from father to son and on to grandson this interest in astronomy has apparently been handed down. When Senator Clark is in Los Angeles he spends many of his evenings in his son’s observatory, In the dome of this fully equipped astronomical observatory is the telescope—a six-inch refractor. The pedestal is so built that the vibra- tion of street cars 200 feet away is not transmitted to the instrument Probably nowhere else in the world is there another private ob- servatory like that built by William A. Clark, Jr., in the grounds of his home in Los Angeles, in order to popularize astronomy : > / ‘ i { th de al W fc it ~ h bes
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This cable hoist made the transpor- tation of the bolts Stacking up the bolts of cloth HEN the United States entered the great war in 1917, the Quartermaster-General found it necessary to establish zag form. depots for the enormous quantities of supplies needed for the as they leave the gravity chute after their swift trip to the ground floor of cloth from lower to upper floors very much easier The old sl Providing Rapid Transit for Bolts of Cloth . A bolt army. In New York the Depot Quartermaster rented a an angle of 45 deg puilding fifteen stories high for the storage of the thousands of bolts of cloth which had accumulated, and which were to be made into uniforms for the soldiers. The building was not equipped with a freight elevator. As it would not have been feasible to carry the heavy bolts of cloth up and down the stairs some means for transporting them had to be devised. The official in charge of the ware- house solved the problem by installing a cable hoist with hooks in the shaft of one of the passenger lifts for carrying the bolts to the different floors, and a chute in the shaft of another passenger lift for sliding the bolts from the upper floors to the ground floor. Kill the Fated Pig Loading bolts of cloth. into the gravity chute. In a few seconds they will land safely on the ground ow and laborious method of transporting heavy bolts of cloth from one floor to the next As the space in the shaft was limited, the chute was built in zig- of cloth placed in the chute at any floor, slid down the smooth surface of the chute at rees, then dropped a few feet to the next chute going in the opposite di- rection, and so on until it reached the bottom. In dropping from one chute to the next below the bolt turned over. This had the advantage of preventing the overheating and burning of the cloth by friction while it is sliding down at a great speed. f It required only a few seconds for a bolt of cloth to slide from the top floor ef the building to the ground floor. Thus, as frequently happens, a little thought saved many hours of valuable time. This is only one of very many les- sons in economy that we learned during the rush of war production. Its Own Temperature Regulator just as a great fat sow, weighing three hundred and fifty Syorey has a freight tunnel under the principal pounds, stepped from a truck to the stockyard platform, business section of the city, the so-called Loop she dropped dead. Not from fright but from heat; fat district. This under-ground tube, besides being useful, is pigs like people, cannot stand the heat. And so pig owners Here’s the way to are warned to keep their pigs cool. heed the warning: A roof is built on the pig pen and upon this roof is placed a large pan of water. Burlap wicks with one end in the pan hang over the sides and reach down near to the ground. The wicks absorb the water until they are thoroughly wet. Then the water begins to evaporate. As it evapo- rates it cools the surround- ing air and, incidentally, the pigs. Strong pigs don’t die from heat but lose fat rap- idly unless they are kept cool. It pays to save every ounce of pork. BURLAP WICKS The wicks absorb the water from the pan and as this water . evaporates the surrounding air is cooled—and also the pigs point. interesting, because the temperature of the air in the tunnel is remarkably constant. The maximum tempera- _ ture variation throughout the year does not exceed ten degrees. This is because, when the heat of the air is high, as in summer, the materia] through which the tube is cut absorbs part of the heat and stores it. In winter, when the air temperature is low, the millions of square feet of the tunnel surface give up the stored-up heat to the air, thus restoring the balance of temperature. During the summer the warm outside air, heavily charged with moisture, is cooled almost to the dew : | Street. neludes astro. ‘cation, amph- i dealing a ste ie Oncord, : | a ENDS OF BURLAP WICKS nds my , ——
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Putting the Spinning-Top to Work In which the marvelous gyroscope is explained with the aid of a few experiments that you can repeat yourself _ gyroscope admits of both mathe- matical and popular explanation. Its marvelous balancing power is one of the most striking illustrations of the fundamental law of inertia, the most common property of all matter. Iner- tia means inactivity. A body at rest tends to remain at rest, or if in motion to continue in motion unless acted upon by an outside force. This is something which everyone knows from common experience. When our valuables disappear we act once assume that some thief has overcome their inertia. A moving train does not stop when the power is turned off, but only when the brakes: have been applied and the friction and air resistance have over- come its momentum, and mo- mentum is simply the inertia of a moving body. he: being a puzzle, the The Power of Ineriia The earth rotates on its axis and revolves around the sun - with no appreciable diminution of velocity because it meets with no resistance and is itself powerless to accelerate or re- tard its motion. So with our top or gyroscope. When it is set spinning, it resisis with a force altogether greater than one would expect, from its size and weight, any tendency to change its plane of rotation, or the direction in which its axis points. This resistance is simply the inertia of a rotating body, and its magnitude depends upon the mass and speed of the body. The swiftly turning wheels of a motorcycle resist with tremen- dous force any change in their plane of rotation, and therefore balance them- selves and the rider in perfect security. The better to study the laws of rotating bodies, I have made a large gyroscope from a bicycle wheel, and operate it with an electric motor. On one side of the hub I brazed a clutch similar to that of an automobile crank. I extended the cone-shaft about two and one half feet by boring By Floyd L. Darrow spinning wheel upon the upright sup- port. A chuck and holder to fit the end of the motor shaft were provided in order to engage the clutch in speed- ing up the gyroscope. I weighted the rim with a large number of turns of copper wire, holding it in place with copper bands, and trued the wheel about the shaft perfectly with small » quantities of solder placed wherever An excellent gyroscope suitable for experimental purposes may be made of an old bicycle wheel, the rim of which is weighted with metal bands and carefully balanced needed on therim. The heavier the rim the less will be the speed required; but a fellow experimenter, in using lead for this purpose, found that as he speeded up the wheel the lead began to leave the rim—and he very prudently began to leave the room. In making a demonstra- tion the operator holds the clutch of the gyroscope firmly against the chuck on the end of the motor shaft, and his assist- ant gradually speeds up the motor. When a fairly high speed has been attained, the gyroscope is withdrawn and upon the support as shown ih the ey Instead of falling, 4, end of the shaft bearing Phe wheq stands slightly above the ‘horizonta) and the gyroscope at once begins to 7a. volve, or ‘‘precess’’ about the vertical support, seeming to the popular mind completely to defy the law of gravity As the speed of the spinning whe dies down its axis slowly drops to the : horizontal, then below, and gradually the action ceases. If the wheel be ope. ated in the opposite direction the samp phenomenon occurs, -except that the precession is also in the opposite diree. tion. ‘Wrestling with a Giant Holding the rapidly rotating gy. roscope in the hands, one experiences no difficulty in moving it in any direetion, es long as the plane of rotation is not changed. But attempt to distur) this and a tremendous resistanee at once develops. One seemingly wre. tles with a giant. We are opposing the inertia of a rotating body, and find that it is very great. Once set spin. ning in a certain plane, our gyroscope continues to rotate in that plane with all the momentum it possesses. But why does the gyroscope pre cess? Why does it not fall? Far from being in defiance of the law of gravity, it is because of this law that the gyroscope behaves as it does. 4 body that is under the influence of two forces or two motions at the same time can never act as if it were under the influence of only one. And this & just what the popular mind does not take into account. Our gyroscope® made to rotate about one axis, andi will be readily apparent that ti gravitation of the tends to rotate about aim other axis at right angles to the first. Therefore tim gyroscope can rotate 7 rotation were absent, two. parallel with this interme neither axis as if the ot a must tend to rotate abou pt an axis lying between the In trying to place itself and threading a hole in the , ed end of a steel rod and screwing this on the pro- jecting end of the shaft. This was made secure with a set-screw. About midway of the bar a socket was bored to provide for mounting the This diagram explains why the gyroscope, resting with the end of its axis on a vertical support, does not fall but revolves around. Its motion is the re- sultant of the parallelogram of forces, one the gyroscope’s own motion, the other gravitation The gyroscope, having freedom of motion in every direction, Owing to the method of its sus- pension, will invariably assume and maintain a position with its axis of rotation parallel to the earth’s axis, and pointing at the pole star, the true north diate axis the gyroscope be gins to revolve, or precess; but.in so doing the diree tion of each axis shifts, and as long as the speed of the gyroscope keeps up, its own axis will continually chase this intermediate about the vertical support, but wor be sho of pre cea for tra act mo she mo at Is tio sal DUE |
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put never catch up with it. Were there pein = rotate with its axis at right angles to the support, but there would peno precession. This is conclusively shown by placing a counterpoise on the free arm of the gyroscope shaft just sufficient to balance the weight of the wheel, when the precession immediately ceases. Thus, when the force of gravity is neu- tralized, the gyroscope action disappears. = If the counterpoise is moved to the end of the shaft, causing the wheel to move upward, precession at once begins again, but is in the opposite direc- tion. After such a demon- stration even the most skeptical could never as- sert that the gyroscope suspends the law of grav- ity. Such an assertion is simply a camouflage for ignorance. A Spinning Top The earth itself affords one of the most perfect examples of gyroscopic action. Because of the earth’s constant rotation, its axis, with slight variation, points in the same direction from century to century. It is simply a spinning top. At the same time that it rotates on its axis, however, it is revolving around anoth- er axis in its annual movement about — ‘If the shaft of the gyroscope is placed so that its weight is exactly balanced, its ‘“preces- sion” around the point of support will cease ite ipport, avitational ‘force; our gyroscope: -thesun. The two axes are inclined at - an angle of twenty-three and one half degrees to each other; and therefore, just as our gyroscope precesses, so does the earth. It is continually en- deavoring to place its axis parallel to” *‘axis of its orbit, but with no be: success than the gyroscope. To start the gyroscope the operator holds its clutch firmly against the chuck on the end of the motor shaft, while his assistant grad- ually speeds up the motor,.until. the «desired .velocity_is.reached But the precessionul movement that results, constantly shifts westward the equinoctial points, where the sun crosses the equator, at the rate of fifty-five seconds of arc each year, and causes the axis of the earth to describe a small circle in the heavens, complet- ing it once each cycle of 25,900 years. In other words, the earth wobbles just as a top does in dying down. One of the morerecent, and proba- bly the most important application of the gyroscope is in the gyro- compass, now a part of the equip- ment on all modern battleships and submarines, and the invention of Mr. Elmer A. Sperry, of Brook- lyn, New York. In order to understand the action of the gyro-compass, suppose we carry a gyroscope, mounted simi- larly to the one shown in the cut, to the North Pole. Such a gyroscope has three degrees of freedom; that is, it rotates upon one axis and is free to turn about two others, one horizontal and at right angles to the first and the other vertical. Suppose, now, that we clamp the gyroscope in a horizontal plane, al- lowing it to turn only about the vertical axis, and then set it spinning. If by means of electricity we keep up the spin, the axis of the gyroscope will point constantly in the same direction; but because of the rotation of the earth beneath it, this axis will seem to turn suc- cessively to every point of the compass and describe a complete circle every twenty-four hours. Thus does the gyroscope prove the earth’s rotation. Points to the True North Again, suppose we make a larger and heavier gyroscope, mounted with three degrees of freedom and operated by electricity. Let us, as before, clamp the gyroscope in a hori- zontal plane, but give it freedom about the vertical axis, and then set it spin- ning. Now, since the gyroscope is under the influence of two motions, its own rotation and the rotation of the earth, it is bound to precess just as our bicycle wheel did, ‘ and will slowly swing around until it has placed its axis in line with the meridian, or in other words pointing true north and south. It has done as far as possible what the gyroscope is perpetually trying to do—place its axis parallel with that of the larger curve in which it is moving. Next we will unclamp the horizontal ring, giving the gyro- scope freedom to move in a vertical plane, and slowly its axis will rise until it is parallel with the axis of the earth and points at the pole-star. And there it will remain, pointing not to the magnetic north but to the true north with an accuracy that knows no “‘variableness nor shadow of turning.”’ In a fixed position on land the operation of such a compass presents no difficulties; but when it. comes to mounting one on a ship, which may move in any direction and at the same time be tossed by the waves, the gyro- scope receives a “‘mixed”’ motion which deflects it from the meridian. But Mr. Sperry has overcome these seemingly insuperable difficulties, and with the insight of true genius has perfected an automatic correcting apparatus which neutralizes the effect of every variable influence. Like a creature of life, this gyro- compass seems instinct with initiative and self-control. Quicker than human thought it adapts itself to every change of motion and with unerring accuracy guides the mariner both on the surface of the sea and through its depths. The principles that underlie any application of the gyroscope are always the same. At once the plaything of children and the marvel of sages, within this toy lie hidden the possibilities of the mono-rail car, the gyro-compass, an automatic aeroplane stabilizer, a means of steadying a ship in rough seas, a steering device for torpedoes and per- fect proof of the earth’s rotation. | he Cul, tle zontal, posing nd find J t Spin- "Oscope Wi with pre- 2 Far law of ‘
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-hind, but, alas, even this almost This one-armed boy has special dishes which help him over some of the difficult mo- ments in eating Give Him a Helping Plate ERFECT table manners are hard enough to attain when you have two hands. But what of the one-armed? Fortunately there have been invented plates—soup and dinner—that will lend the one-armed a helping hand. Let us be correct and start with the soup. The soup plate for the one-armed has in the center a second recess in which the last few spoonfuls of soup will lodge. No plate-tipping is necessary. It is assumed that the one-armed man tipped his soup-plate when he had two arms. Next comes the dinner plate. This is really very much like an ordinary soup plate. It has a deep center and a wide rim around the edge. The sides furnish an impassable wall which prevents the dinner from sliding on to the tablecloth when pursued across the plate. Did You Blow Out the Gag) i. numerous accidents caused every “blowing out the gas’’ inspired a New York us ventor to evolve a practical method of preven . The accompanying picture shows the such accidents. inventi” applied to a drop light. _ While the gas is burning, the heat arising from it causes a ittle fan wheel above the lamp to rotate ains are The two little balls attached to it by tiny ch made to swing out- ward by centrifugal force, raising one end of a lever, the other end of which operates a valve in the meter- like cylinder at- tached to the gas- pipe. As long as the heat from the flame keeps the fan wheel and the little balls, which act like the governor of a steam engine, whirling, the lever will keep the valve in the meter open, thus allowing the gas to pass to the burner of the lamp. If the gas is blown out the wheel ceases its rotation, the end of the lever on the lamp side is de- pressed and its other end closes the valve through which the gas flows. This Machine Is a Complete Letter-Writer HE roll of paper at the end of the machine goes in pure and white, and Nothing very unusual in that; the startling feature is that each letter is addressed differently. And since the machine will turn out five thousand letters an hour, the comes out in the shape of printed letters. time and money now spent in having names and addresses typed on form letters, will be saved: You will notice two columns containing stencils near the front of the machine. One of these stencils is automatically dropped each time a letter is printed. - When the machine is used for © printing letterheads it will turn out at least thirty-five thousand an hour! Also the machine will make its own envelopes, printing and addressing them at the same time, ‘while a small attachment puts on the stamp and gums the flap. The opera- tions are carefully timed so that they work in perfect harmony. We have often felt the need of just such a device when our per- sonal correspondence got be- human! machine will not write the original letters. Will no one invent a mechanical thinker ? It makes envelopes; addresses, gums, and stamps them; it prints form letters, addressing each separately Rust-Proof Steel S a result of the invention of sted there was a tremendous prog ress in the metallurgy of iron. Be cause of its greater hardness, flexi year If the gas is blown out, this safe- ty device will immediately shut off the flow of gas to the lamp bility, and tensile strength steel took the place of iron for many uses. But, unfortunately, steel shared with iron and practically all other base metals the inability to resist corrosion. The § famous armorers of Toledo, Spain, x during the reign of the Moors, knew how to make steel proof against ‘rust, but their secret died with them. Only recently did a British metallurgical chemist succeed in rediscovering the secret of the Spanish armorers. He © found that a certain alloy of | steel resisted corrosion by nitric acid and other, less energetit acids, did not scale up to cer tain high temperatures and did not tarnish in the labora tory atmosphere or in humid air. This “‘stainless steel’ is pat ticularly useful for cutlery, garden tools, skates, rifle and shotgun barrels, and cooking utensils. ag 4 8 A | sib tal pre ha to th 4 du — | | th « 8 ;
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cooking Cutting Steps in the Skyscraper How we may call back the sun to city streets and perhaps come to walk in high places — By F. W. Fitzpatrick scrapers? Sweden prohibits anything that looks like a sky- scraper. London may allow two stories more than is now legal height, but even that is doubtful. Paris will not have any. It is in this country, where every town cf ten thousand persons must have a twelve-storied building or be en- tirely out of the running, that there is the liveliest interest in the sky- r problem. insists upon sky- scrapers; Chicago is not so sure but that they are unhygienic, light ob- securing, unsightly and somewhat unnecessary. But everyone concedes that in congested New York it is absolutely necessary to build upwards since but little lateral expansion is pos- Many cities have established two hundred feet as the maximum height of buildings. There is even a tendency to reduce that. It is generally conceded that the ultra- tall building is not necessary, is not profitable, is a detriment to the artistic appearance of a city, and has no reason for existence at this late day except as an advertising medium. New York has made a concession to good sense in recently adopting the scheme of the “stepped-back’’ building I first advocated years ago, but could in- . duce no city to adopt at the time. The plan permits the erection. of a building up to a certain height on the street line. To go higher the owner must step back the front of his building in order to allow a greater width of “street inthe air.”’ Successive “step- backs” until the roof is attained would insure the admission of air and sunshine to the constantly shadowed streets below. G eran we go on building sky- 4 4) Instead of using bricks and stone, Mr. Fitzpatrick planned to use iron columns and beams in his first sky- scraper, the Tribune Building of Minne- apolis; that was in 1884 when eight story buildings were the limit; un- fortunately the owners were afraid to attempt a sixteen-story building Mr. Fitzpatrick, who is a well-known architect, may truly be called the father of skyscrapers; he was the first one to think of buildings in terms cf ten or more stories. He tells the following tale in connection with the first sky- scraper ever planned: “I was a draftsman in an architect’s office in Minneapolis in 1884. The chief engineer was a Swede nemed Strom, a colossus of a man who could figure the hind legs off a kettle; a veritable genius in mathematics and mechanics. “Well, one of our problems was the Tribune Building in Minneapolis. The lot was narrow and a great emcunt of floor space was desired. So we planned the first sixteen-stcry build- ing. But the owners were afraid to risk it! We had to give up tke idea.” Some skyscrapers, for example, cast a shadow covering nearly eight acres. The Adams Express building, New York, which is 424 feet high, casts a shadow 875 feet in length; the Equitable building, which is ¥ 493 feet high, one 1,018 feet in length; the Sing- er Tower, which is 540 feet high, one 1,127 feet in length, and the Woolworth Tow- er, which is 791 feet high, one 1,635 feet in length. Some sky- scrapers cast shadows from a sixth to a third of _ a mile in length on surrounding property. Thus the Equitable building’s shadow at noon on De- cember 21, is about one-fifth of a mile in length; it completely en- All sunlight is cut off from the narrow streets on which New York skyscrapers stand; and the shadows tall buildings throw on each other add to the gloom velops an area of - 7.59 acres. Yet aT by & amp of sted 3 prog: . flexi- Spain,
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. Even part of the New the ground area of the Equitable building is only 1.14 acres. The shadow cuts off all sunshine from the Broadway facade of the United States Realty building, which is 21 stories high. The New York Title & Mortgage Company building, 14 stories high, and the Washington Life Insurance building, 19 stories high, are both completely shaded. The south side of the Singer Tower is shaded to a height of 27 stories. The nearest part of the City Investing building, 400 feet away, is in shadow for 24 of its 26 stories. York Telephone build- ing, north of Cortlandt street is shadowed by the Equitable building. Cedar street, the street _ immediately north of the Equitable building, ‘has an average width of 34 feet between Broadway and Nassau street. The: height of the. Equitable building is 1414 times the width of this street. On a north and south street of this width in New York, uniformly improved on both sides with buildings having a height equal to that of the Equitable building, only 9.31 per cent of the windows would receive any direct sunshine at noon on the shortest day in the year. On north and south streets only the windows nearest the top for a dis- tance equal to 1.35 times the width of the street would receive direct sun- shine at noon on Decem- ber 21 at New York (40 degrees. north latitude). The windows in the first 34. stories nearest the ground. would receive absolutely no direct sun- light. Direct sunlight would only enter these windows stories neurest the top. Not a single window within 447 feet of the in the four’ The Eiffel Tower is 1,000 feet. high, the Monument 550 and the Woolworth Build- with buildings one and one-half times the- street width in height, only 90 per cent of the windows obtain direct sun shine. The Editor of the POPULAR SCIENCE MONTHLY has asked me how high I would dare to construct a building with the material and skill available today. The progression is interesting. People will walk up to a third story, therefore that is the limit of un- elevatored buildings. When once you have: to install an elevator in a four story structure, very little additional Four Hundred Stories—Four Thousand Feet High Washington. Building. The dots on the freak structure indicate win- dows. There could be some four cost is involved in buildine stories. Build more than lett shag and you may as well plan for tare for ten, then for fifteen, ete. Ahoe twenty you find yourself in an entineds new order of construction, and atl pressure. Thirty and forty sto buildings are wasteful. over forty stories in height belon : the class of freaks. i If I could locate a buildin wilderness, upon rock at least five feet thick in a region where the had never been an earthquake, and i: I could disregard the matter of elevators or of rooms encumbered with wind bracing I am quite sure that a structure 4,000 feet high could be built on a base 400 feet square. We don’t know how steel or wind behaves at that height, but we ean fairly caleulate. from g in the seventy. a what we do know about lower structures. . It is strange, that al. though the tallest build. — ings are in New York, 5 the tall structure did not originate there but is a product of the West, Undoubtedly the sky. scraper was thought of, perhaps discussed, prior to the first publication of the idea in the West, but the fact remains that nothing was writ- ten about it until 1884, In 1889 Architect Jan- — ney of Chicago designed and built the first actual — steel framed so-called “skyscraper”? wherein the outer walls were but © curtain walls supported upon steel work at each story. New York then took hold and now the highest structures in the world are there. . Strange to relate, how- ever, and somewhat of a vindication of ‘the reasoning of the kind of ’83, buildings much over ing is fifty odd stories hundred stories twenty-five stories are street level would receive high. What’s the maxi- in the 4,000 feet more valuable as adver- a ray of direct sunshine. mum? Thissketchin- tising media than as The Equitable build- shaft itself would PUilding investments. ing is, of course, aN €X- knowledge of today. have to be about Thestructures of twenty- treme case. But evenin At the sides are 400 feet square five stories or so, reason- much lower buildings a considerable number re- ceive absolutely no direct sunshine at the winter solstice. Up toa height equal to 1.35. times the width of such a street all the windows receive some sunshine. If the street, . however, is improved sketched, to the same seale, the Eiffel Tower, the Washington Monument and @ the Woolworth and the lateral spread of building about its base would ‘have to be over a thou- sand feet square ably located, all pay well, while the huge, over- grown fellows produce 4 rather unattractive re turn. An occasional sky- scraper may act as 4 tower in the landscape, | but objection has devel oped—and rightly —to their multiplication. 1 | a | | |
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ich over ries are s adver- shan as tments. ‘twenty- , Teason- pay well, e, over: roduce a tive re- sky- ct as a ndscape, is devel- atly —to tion. Re The “Stepped-Back” Skyscraper and the Thirty-Story Sidewalk. To the left is a diagram illustrating Mr. Fitzpatrick’s proposed “stepped- back’? skyscraper construction to re- duce shadows. Down at the bottom is the existing street A. The first level B is established where all build- ings that are to be higher must be re- ceded. The dotted line F, prolonged from the center of the street to B up- wards, establishes the levels C, D, etc., at which the building must again be re- ceded to permit the desired amount of sunlight and air to reach the street and the opposite buildings. A building may be roofed at an intermediate point E In the picture above Mr. Fitz- patrick’s scheme is visualized on the left hand side. The right-hand side of the picture shows the shadows cast by the present type of sheer sky- scraper construction, some of [which cover nearly eight acres. It is doubtfui if municipalities will permit real estate owners to build structures taller than those that now shut out light and air from the streets below. Many streets in the financial district of New York are flooded with sunlight for but a few minutes during the day, and some never receive the direct sunlight at all pat — €s, (= | i ' .
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While the cutters are working at one piece, another is placed in position at the opposite end of the rotary table Keep the Milling-Machine Busy HE working capacity and hence the productiveness of the milling-machine is greatly limited by the time lost in removing a finished piece of work from the table and putting another in its place. Almost as great a loss of time is caused by the stopping of work when the same piece of casting, after the completion of one cut, is placed . in position for cutting another surface. During these necessary changes the milling-machine is idle and when they are of frequent occurrence, as in the case of small New Bristles After Each Shave Wats we go to the barber shop (and many tho of us are still shaved there) as a rule we get lath with a brush that has soaped hundreds of faceg ig a brush that may have lurking on its pliant bristleg ; spite hot water and soap, countless thousands perh - millions of deadly microbes. tec. Why not an antiseptic shaving brush for genera] use? And why not compel barbers to use it for hygiene sake? F. W. Fitzpatrick of Omaha, Neb., has conceived th idea of a brush case or handle six inches long, r bundle of grass or wood fibre “bristles” wrapped in Oiled paper is inserted so that they cannot be handled direct} There is a push button or other device to push out the “bristles” after each shave, much as one used to turn Up a wick in an old fashioned oil lamp The idea is to shave a man, cut off the part of the OF BRISTIES bristles that have cut move soaped him, and push out the bris- tles for another shave. Virtually every customer has a new brush. If we had to use the usual bristles the fisre cost would be pro- hibitive, but with a fine wood fibre, which is much FASTENER A clean brush for a clean shave,” might be the glo. pieces, they cause a serious loss of time. Recently a new type of milling-machine has been developed, which, in a large measure, overcomes these difficulties and makes mass production of small articles requiring milling possible without expensive additions to the plant. The machine has a rotary table which carries the work to the cutting position. While it does its work on the piece before it, another piece is fastened at the opposite side of the table. When the first piece is com- pleted; the table is swung around so as to bring the second piece in cutting position. This is reveated as often as necessary. The cutter may be held in a fixed position and the table rota- ted continuously by auto- matic feed, or it’ may be swung back and forth while the table is given an inter- mittent motion regulated by an indexing mechanism. Adequate lubrication is in- sured by allowing the lubri- cant to flow in a _ steady stream over the cutter of the machine. The lubricant is carefully strained before it runs into the reservoir from which it is again pumped to the cutter.. The table is set at an angle of fifteen degrees, which makes it possible to submerge the lower side of the table and to carry on the cutting operation under the surface of the lubricant. exact work, keep its teeth sharp with this grinder gan of this device cheaper, the brush is just as smooth and lather-making and is cut off before the wetting makes it mushy. Sharpening ‘the Teeth of a Metal-Saw N modern factories circular saws with inserted teeth of extremely hard sted are used for cutting metals. But even the hardest saw teeth become dull after a while through wear aided by the heat produced by friction, which diminishes the resisting powers of steel. A light, inexpensive little machine placed in the market by a manufacturing concern in Massachusetts makes the sharpening of the inserted saw teeth a simple operation consuming not more than from ten to fifteen minutes. A strong iron base, which can be screwed or bolted to any work bench, carries the saw holder and the grinder. The saw is placed on the center pin of the holding post or turret and is fastened securely by a screw nut. The turret engages 4 T-shaped slot in the base and can be fastened in any position by a lever. The grinding-wheel, which is enclosed in a housing leaving only a V-shaped part of the wheel exposed, has a rotatable base the posi- tion of which, relative to the saw, can be adjusted to any desired angle by the mer turning of a lever. The grinding-wheel is driven from _the line shaft and is brought | into cutting ccntact with the saw-tooth by tilting it for ward toward the saw. In the process of grind ing, the outer edge of th) saw is firmly supported by an adjustable post placed near the base of the grindet. To hold the saw against the grinding-wheel, a stop, con trolled by a handle, is brought to engage with the first tooth forward of the one _ being If you want your metal-cutting saw to do rapid and sharpened. 4 = . ‘ 4 | } | | i i ee } ‘ — | — : —
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| brush for shave,” e the slo- his device ff before WwW ard steel ome dull n, which facturing iw teeth utes. A urries the e holding ngages ver. V-shaped exposed, the posi- ve to the d to any the mere r. The iven from brought with the ig it for of grind e of the) orted by t placed e grindet. rainst the top, con 's brought irst tooth ne being ~ It Does Everything but Answer to “Whoa!” How the one-man tractor is steered, started, stopped, and turned by simply pulling on two sets of reins HE one-man farm tractor is driven just like a horse, and may be started, stopped, its speed varied at will and. turned to right or left, at the operator’s desire, by simply pulling on two sets of reins. With one or two men the mo- | tor farm tractor does the work of several teams of horses with double the num- ber of men. But in operating a tractor its manip- ulation is only a part of the work, since the driver must .also take care of the imple- ment being hauled, be it plow, cultivator, harrow, binder, or manure- spreader. With the ordinary type of tractor, which requires the driver to stay on the tractor in order to control it, a second man must be provided to take care of the implement being hauled. The basic idea behind the one-man tractor is to make it possible to operate the tractor from any point on any of the implements or while the driver is walking on the ground to one side of the implement. In the type of tractor here shown this result is obtained by manipulating the speed of the tractor, its steering, and the shift- ing of gears by means of two sets of reins—a double set for throwing ’ the engine clutch in and out and for steering the tractor to right or left, and a single line for shifting the gears. By this construction, making it unnecessary for the ‘operator actually to sit on the tractor, the entire design of the tractor may be changed. For instance, it is thus possible to do away with the usual forward guide wheels and to support ninety per cent of the entire tractor weight _on two driving wheels and thereby secure better traction per pound of weight. Two small wheels to the rear are provided, so that it is impossible for the tractor to turn over backward on the operctor and implement. The.controlling mechanism is in By Joseph Brinker two distinct steps: first, the clutch and steering mechanism, manipulated by the double rein; and, second, the gear-shifting device, controlled by the single rein. GEARSET CONTROL LINE _GEARSET_ CLUTCH AND STEERING REINS: ~ \ You drive the tractor with reins similar to those used on a horse, but it isn’t necessary to shout ‘“‘Whoa!”’ although: you may feel like it While the clutching and declutching device, combined with the steering mechanism, at first sight appear quite complicated, this is not the case, once the direction of the power transmission is traced from the source to the points where applied. The entire equipment weighs only twenty-five pounds. Power to do the turning is taken from the tractor engine. All that is neces- CLUICH AND “STEERING YOKE GEARSET LEV"2 AND REINS AND CONTROL BEVEL GEAR CASE RATCHETS CLUTCH CAM AND LEVERS. WORM AND GEAR CASE STEERING STEERING SECTOR Here is the driving mechanism in detail. You have only to study the lettered parts to find out how the steering is accomplished CLUTCH ANO STEERING YOKE sary to apply this power is to pull on the double reins. The power is taken from the engine cam-shaft to a transverse shaft at the rear of the motor, between the last cylinder and the bell-housing of the flywheel. From this first power shaft the power trans- ferred through a series of gears to a second power shaft a little above and behind the first. This second power shaft issplined and carries two small leather clutches having a collar be- tween them that operates a fork, which, when they are not in use, holds the clutches in a fixed position. This is accom- plished by the use of tension springs. One of the small clutches is used to steer the tractor in one direction and the other in the opposite direc- tion. The actual steering is accom- plished by a series of three bevel gears. One operates in conjunction with each of the clutches, and both gears mesh with the third or largest bevel gear. The two smaller gears are loose on their shaft until either clutch is engaged. When this takes place, the power is trans- ferred to the third kevel gear, which is mounted on a shaft that runs to the rear of the tractor. At the lower end of this shaft is mounted a worm, which in turn meshes with a worm gear rr ounted on a short vertical shaft carry- ing a pinion operating tke seg- ment gear extending the width of the tractor. While tle shaft carrying the small pinion is supported by the tractor frarre, the segment is attached to a suk- frame pivoted at its front end to the tractor frame and supported at its rear end on an axle carrying the two smiall trailer wheels. The two small clutches with their bevel gears are thrown into - mesh with the third large bevel gear to steer the tractor either to the right or to the left as the driver may desire. : | Usands athered \| before, | les, de- ; | perhaps | use? ved the | ng. A in Oiled directly, turn up i SLIDING BEVEL GEAR CLUTCH SHAFT \ all | 4
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‘In these days of rapid transit a blacksmith shop ‘‘under the spread- ing chestnut tree” has become a thing of the past. prefers the shop brought to his door Get rid of that tired feeling by attach- ing this foot-rest to your accelerator. It accommodates all sizes of feet“and it can be adjusted in four different ways FOOT REST SPRING The motorist The rollers in the bearing are stag- gered on individual shafts, providing a large bearing surface with good lubricat- ing facilities, and eliminating the un- even strain set up in ordinary bearings Accessories that Mark 110-volt motor, yj lathes, drill-preat Stinder, power-driven oxya lOw-pipes for welding and cutting, etc, The ‘cost of the Pa not great and it is certainly profitable The rotary switch is mounted on the steering-post and controls the starter, ignition, lamps, dimmer and horn torque and side thrust The contrivance shown above locks the starting crank of a Ford so no- body can run away with the car The rubber cushions give this truck wheel resiliency to overcome radial, shocks What is claimed to be the first aerial express in this country car- ried a load of special tires from Milwaukee, Wisconsin, to an auto- mobile manufacturer in Toledo, Ohio—a distance of 300 miles Anew design of grease- cup has no exposed threads to get filled with dust and dirt. It is of the plunger typeso that the grease must be forced into a bearing when the special self- locking cap is turned Jack Flecher Here is the only thing on wheels that ever climbed Mount Baldy, California. occupied the saddle 3 a | —
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The. peculiar outfit here shown might be taken for a reversible semi-trailer. simply an expedient adopted for the de- livery of a_ tractor and two semi-trailérs This table set for four people can instantly be converted into a robe rail without loosening any bolts or nuts. It is absolutely rigid This foot accelerator is pivoted i! near one end and is operated by a side motion of the foot instead REED oe of a downward push. The FIBER SMALL PISTON width prevents the foot slipping SATONARY JAW = “MOVABLE UAW An invaluable vise for trueing up pis- tons or inserting newrings. The jaws can be adjusted to fit any size of piston A new type of bench support holds an entire automobile engine and allows it to be turned upside down or held in any other position that may be desired to facilitate the work of the mechanic TURNING CLAMP SHAFT This home-made device consists of a piece of tubing which clamps the valve wholly into the vise and allows the cotter key to be withdrawn with a pair of pliers “Help! Help!” the cry sent the life guards speeding down the beach in their first aid-motorcycle. Now they are hurrying back with the woman rescued The distance type motor meter is especially designed for use where the radiator type cannot be installed on a line with the operator’s vision Successfully competing against its big manufactured brother, this trac- tor was made from an old time car by Boyd Stickley of Strasburg, Virginia é petite ig It is x q ad j
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. off through an exhaust pipe at That Old Worn-Out Hat In this tank many thousands of worn and weary hats Were steamed and blocked HEN the summer ends and you begin to look-enquiringly over your trunkful of last winter’s clothes, out comes a felt hat—stained, limp, shapeless. You- cast it aside and buy a new one. But that old. hat Cleaning with Air-Driven Sand When the hats had been carefull they were go back into Thousands of old hats were sent to this salvage station in Tours was still full of energy Had it been cleaned, steamed, blocked, and ironed you might have wornit another year. Even then the felt could have been made into excellent hospital slipper, This is one of the thrifty lessons that were learned during the war, when salvage departments were confronted with stacks of discarded hats full to the brim with future possibilities, Crutches with Springs in Them AND blasts and tumbling barrels have been employed for a great many years in foundries and metalware factories for removing scale, molding sand and core particles from castings or dor: finishing metals preparatory to rust- proofing, enameling or sherard- izing. New, however, is a machine which combines sand blast and tumbling barrel and cleans the metal parts placed in it by means of a continuous stream of sand while they are tumbled around, constantly changing their position and ex- posing new surfaces to the cleansing action of the air- driven sand. The machine consists of a housing made principally of cast-iron plate and provided with double sheet steel doors which confine the dust that : hi . . u lag \ | = 5 4 || — —al — —
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What Shall We Do for Oil? Even a billion barrels a year falls short of supplying the demand ETROLEUM is the most gorgeous sky-rocket in the industrial world today. Ever since it began its blazing ascent with the Pennsylvania oil boom of 1859 it has been indulging in all sorts of pyrotechnic outbursts. Its flight has followed no smooth and simple curve; its zigzags upset all calculations. At present, however, the world is watching the course of the rocket with bated breath. The American people have several excellent reasons for being particularly attentive specta- tors. In the brief period that has elapsed since the pioneer oil-wells were drilled in the United States, we have used up about 40 per cent of the entire avail- able supply of petroleum under our soil. Nature is not repairing this loss. It took her thousands of centuries to distill from bygone plants or animals and store up in the rocks the oil that we have used and wasted in sixty years. According to the latest esti- mates of the Geological Survey, the oil still underground in this country and recoverable by existing methods of production amounts to only 7,000,- 000,000 barrels. A few years ago, a reserve of this magnitude would have seemed to ensure a comfortable future for the oil industry for many genera- tions to come. Today, owing to the colossal de- mands for gasoline and fuel oil, it looks desperately meager. oil in the ground dwindles it must be sought at lower and lower levels. This 4 means a progressive in- \ crease in the cost of drilling wells. More money must be sunk in the ground be- fore any can be taken out; and cases will be more and . ( more frequent in which the / investment will be a total | loss. Two wells recently sunk in West Virginia, deeper than any borings previously made anywhere on earth, yielded noth- ing but a series of interesting rock specimens and some data on subter- ranean temperatures. The demand for petroleum in the United States, as elsewhere, is not only enormous, but it is increasing at a prodigious rate. This increase has already led to a situation undreamed of a decade ago and fraught with a As the stock of - Shooting an oil well. In a moment the drillers will know whether they have a thou- sand-barrel gusher, a more modest success, cr nothing in the world but a hole in the ground grave possibilities. Though we pro- duce far more oil than any other country, we are now using a great deal more than we can produce. Last year our consumption exceeded our pro- duction by nearly 62,000,000 barrels. It has become necessary to carry coals 4 F ire on the oil farm. Scme of these “farms” have 400 to 500 great oil tanks, each holding 5,500 barrels of oil. When lightning strikes a tank—-an occurrence not at all infrequent—there is a hard and dangerous job ahead for the fire-fighters & — 4 have thei d for to it; | walk your & and, 'g hols 4 i :
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Drilling oil-wells in the ocean. Summerland, in California, is the only place in the world where they do it. These famous wells, though still an object of interest to tourists, now produce but little oil to the oil Newcastle! America, with . petroleum resources no longer “‘bound- less,” is becoming one of the leading importers of petroleum. The implications of this situa- tion have just begun to be real- ized. Dependence upon foreign oil-fields is a serious predicament in time of war; it is also serious in time of peace. Nearly all the oil-producing countries of the world — except open-handed, easy-going Uncle Sam—are be- coming decidedly chary of per- mitting outsiders to exploit their fields. Great Britain, America’s greatest rival in the petroleum business, while debarring foreigners frora her oil-fields, is actively aiding British companies in acquiring and developing oil properties in other countries, including the United States. ‘The British Government is a heavy stockholder in companies operating in Persia, Mexico and elsewhere, and has recently established a permanent Petroleum Department to further the British conquest of the world’s oil markets. France, Roumania, and Mexico are all considering the nation- alization of their petroleum indus- tries. Not to multiply details (which are fully set forth in a report of the Direc- tor of the Bureau of Mines published in the Congressional Record of July 29, 1919), the American people have suddenly awakened to the fact that, with a sadly depleted stock of petro- Coming on the “lot.” Cften tke oil country is far from a railroad and. then teams must be'used leum at home, they are becoming more and more dependent for their supply of this in- dispensable commodity upcn their most pow- erful commercial rivals, especially Great Brit- ain. Be it noted that, as a result of the war, the promising oil-fields of Mesopotamia and Paaua have been added to the British Empire. When one considers recent events in Mexico it is easy to see that the oil-hunger of the great industrial nations is likely . to be one of the most fruitful sources of international discord in the near future. What is the answer? Is if found in the billions of barrelsof shale-oil awaiting extraction from our mountain ranges— perhaps by cheaper methods of distilla- tion than have been invented? Will the automotive industries become independent of gasoline, whether derived from the petro eum of today or the oil-sheles of omorrow ? Is alcohol the com ing motor fuel? Or have the chemical laboratories surprises in store for us, in the shape of new and rev olutionary fuels, still undreamed of? Inserting the casing of an oil-well that the hoped-for deluge may flow out smooth'y. SN py — = = 3
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. How to Strike Oil It’s easy to sink a fortune in an oil-well without striking anything but alot of experience. The sketch above gives a typical cross-section view of the geological for- mation occurring in an oil-field. Gas gathers at the highest point of an anticline, oil being below the gas, and salt water below the oil. If drilling is started too far down the incline water will be struck, and drilling in the ‘“dip”’ of a syncline will produce nothing but water What goesdown must come up! The reverse of the old saying comes true when an explosive is dropped to the bottom of an oil well. One way to coax oiljout of its hiding place is to blow out a pocket in the bot- tom of the well with a charge of nitroglycerine ; In its journey downward the oil-seeking drill must cut and pound its way through strata that tell the geologic story of the ages. Hardrock soon dulls the cutting edge of a drill. Here it has been hoisted out and the men are putting on a new “bit”
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| The Welsh Rabbit Trick “Ladies and gentlemen, I have here a tin saucepan in which I will make a Welsh rarebit.”” And he proceeds to - do so. Eggs, cheese, sauce—the fa- miliar ingredients are poured into the pan. He covers the pan with a lid, borrows a silk hat, and tries to fit the pan into the hat. It fits. He lights a piece of newspaper and drops it into the hat. He claps in the pan, removes it again, takes off the lid, and removes —not a cooked rabbit, but a real live rabbit ? The saucepan does it. A shallow pan, the same depth as the lid, receives the inzredients. A loose outer covering re- mains in the hat after the pan has been “fitted.” In this the paper burns. The pan proper, clapped on the fire, contains the live rabbit, imprisoned by the shallow pan holding the materials. When the lid is lifted it takes with it the shallow pan and Brer Rabbit is revealed. Here’s the Burning Globe “Lend me a handkerchief,” says the magician. He stuffs it into the large bottle on the table, and pulls it out stained with wine. He picks up a brass globe. ‘‘See, it is empty.” He puts the handkerchief inside, pours in wood alcohol, lights it, and shows the handkerchief scorched. Again he holds up the globe—yes, empty. Back goes the handkerchief, on goes the cover, off goes a pistol. What’s this? Our handkerchief neatly folded. The bottle is divided lengthwise, one half without a bottom; the other con- taining a dummy handkerchief and some wine. The borrowed handker- . chief goes right through the bottle and _on to the servante behind. The globe has two partitions. A half turn brings either section under the true opening. The borrowed handkerchief is slipped into one while the dummy is burned in the other. The Pegs Tell Where the ERE are my wandering trucks tonight?” said the manager of a great trucking station in France to any time. the two men in the picture above. board in front of them and one of them started “‘trucks The men glanced at the “See, Ladies and | Photographs by courteay of The Chinese Linking Rings “Ladies and gentlemen,” says the magician. ‘See, the links are steel. Feel them yourself. There isn’t a break or opening in one of them, And yet I will make a chain of them which will fall apart at my command,” Yet one of the rings has a secret open. ing. Why didn’t you detect it? Be. cause the foxy magician didn’t hand out that link. Besides this “key” ring there are two single rings, solid; two rings permanently linked together; and three permanently linked to. gether.. By clever substitution and deft use of the “‘key”’ ring they appear to be linked and unlinked. Trucks Are careful account of the doings of every truck may be Had at The board also indicates whether or not # truck is loaded and the number of men working on. it. ‘ The two men pictured here have entire charge of the three and seven are in warehouse number eight and have system. Every morning, when the schedule for the day is just been loaded; trucks five and nine—” and so he con- tinued until he had given . the location and condition of every truck belonging to the station. The board gave hin his information. It is divided up into sec- tions—each section repre- senting a warehouse. The trucks are represented by pegs that fit into holes in the hoard. When truck seven, for example, is sent to warehouse nine, its cor- responding peg is trans- ferred to the section of the board representing ware- house nine. The board is set every hour and thusa With a peg for everv truck and a square for every warehouse, the position of the fleet units can be seen at a glance made out, these men set their boards to show the start- ing positions of the various trucks. An hour later they will move the pegs to show where the trucks are then. This performance is re peated every hour until each truck’s work is done for the day. Ifa driver is not able to follow his schedule for some reason or other, he im- mediately notifies the men at the board, and they promptly record the delay. On the whole, the bozrd gives a reliable picture of the status of each individ ~ual truck. ~ of 4 4 —
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dat ‘truck of the e day is e start- various ey will show re then. is re itil each . for the 10t able lule for , he im- he men d they > delay. 2 board ture of individ- | Gentlemen, I Have My Sleeve” tbe Paramount-Bray Studios The Flag and Handker- chief Trick . he magician: “I take this blue white handkerchief and I them together at the corners and stuff’ them into this glass tumbler.” He turns now and takes an American fiag, and rolls it until it mysteriously disappears. Taking one corner of the’ handkerchief ball in the glass, he pulls it out. The American flag is securely tied between the white and the blue erchiefs. ie blue handkerchief has a trick et in which a duplicate flag is hidden. The other flag is stuffed into a small box which is snapped under the magician’s coat by a rubber band. ge Agricultural Note “I adies and gentlemen, I have here a tumbler, which I will fill with earth.” He does it. Then he sprinkles a few seeds on the top. ‘Will some one lend me a silk hat?” They always ask that these magicians. He holds the hat over the glass for a moment -and then takes it away. ‘Ladies and gentlemen,” he says bowing to the applause, “you see that the seeds have sprouted into a beautiful ‘little rosebush. A bouquet of flowers mounted on a lead base is placed beforehand on the servante, behind the table. Attached to it is a loop of fine catgut. When sprinkling the seeds over earth, the magician holds the hat, mouth down- ward, over the servante, and inserts one finger into the loop. ~Thus the flowers are lifted into the hat, as it is raised from the table under cover, and are loaded into the glass of the hat. ‘The ‘Will some one lend me a silk hat?” You hand up yours obligingly and the magician pulls out of it yards and yards of paper ribbon, a dozen cloth balls, a bunch of flowers, the in- evitable live rabbit, and finally a heavy cannon ball which falls to the floor with a thud. It’s the old fa- miliar trick. You’ve seen it a dozen: ‘times. The paper ribbon is tightly rolled and easily slipped into the hat. The cloth balls are hollow, and contain a spring, so made that they all compress into a small space. The solid cannon ball, the rabbit and the bouquet of flowers are placed in readiness on the servante—the small shelf behind the conjurer’s table—and are slipped into the hat under various pretexts, such as brushing the hat, turning it about and trying to jam the paper back—‘For - all that comes out must go in again.” - Birds that Walk Like Men S soon as father and mother penguin get ready toraisea better balance. family, they walk inland from the sea and raise their young on high ground. All during the time the young penguins are on the nesting grounds, the old birds may be seen constantly going back and forth from the high land to the sea. They march to and fro with all the dig- nity of deacons. Generally they go They carry their heads forward in the in- quiring manner peculiar to near-sighted people. While the johnny penguins are exceedingly awkward on earth, as soon as they are in the water, their awkwardness disappears. great rapidity, staying below the sur- face, and only leaping out once in a When a while to get a breath of air. They swim with in groups. They pass each other with a peculiarly aloof air, never giving any sign of recognition, seemingly intent on business of a. private nature, and from their attitude, matters of serious moment engage their attention. Their manner of walking is both interesting and amusing. They are exceed- ing deliberate in their move- ments, lifting their feet high and carefully at each step. They hold their wings well behind them to obtain a Dignified and aloof, almost snobbish, in fact, the penguins march to high places to rear their young penguin leaps out of the water he resembles a porpoise and if you were near enough you could hear him give an audible gasp for air. The penguins wade into the water when they start their sea journey, rounding their shoulders, bending their head almost to their feet, and scooping beneath the surface with a sudden diving movement when they reach water suffi- ciently deep to float them. Invariably they return to the heights to die. and | % ¥ \ G { G J
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The heedful motorist might easily acquire some dollar-saving wisdom By Fred Gilman Jopp HE was out on her first automobile trip and her husband asked her to lean out of the car and see if the tire was flat. ““Not enough to hurt, John,” she said, “it’s just flat on the lower side.” If only the poor old tire could talk what harrowing tales of torture we would hear. One tire came over the counter the other day with the walls of the casing scored and scraped . and the fabric torn and broken away from the rubber. The beading also was damaged. Its owner shook his head as talked I could hear the tire in a tiny disgusted voice, which never reached the owner, saying to me: “T was punctured several miles up the road and this man drove all the way here on the rim. You think I look badly outside; you just ought to see meinside. I’m ruined —ruined beyond repair. I have heard many men tell my owner that he ought to carry an extra tire, but he al- 2 ways replied that he had been 8 pretty lucky. Now you see ie that he wasn’t, and here I am, sick unto death.” The tire tread- or rubber } covering, which is visible, is tread effectively protects the — ; fabric, but small cuts acquired during use, if not immedi- % ately attended to, help to defeat the purpose of the tread. ee When these small cuts appear they should be cleaned with gasoline, given three coats of cement, and after that has become “‘sticky”’ tire filler should be forced into the ie cits. The reason for attending to the small cuts immedi- a . ately even though they do not permit immediate attack - &§ on the fabric, is that they open up and become larger and f within a short. time are serious. If casings are cut very badly—say a four-inch cut or over—or breaks occur in the tread and fabric, a shop vul- anizer can be used to make an effective repair. Of course bad breaks and side wall repairs can- not: be done very. well with a | small equipment and consequent- ly should be taken to a good re- pair shop. ; ‘If the small cuts are attended f to, the tread will last much longer Wy and the fabric underneath will, : - even after the tread has been af worn down from normal use, be in good enough condition to have — the tire retreaded. When the b old tread has allowed water to seep through, the fabric is rotted ti and then a retread will not’ be Probably one of the most com= — worth while. Always remember : mon and inexcusable abuses of &§ that the fabric is the actual tire KE tires is driving them in car tracks — and do everything possible to How the sides of the casing will eventually or deep ruts. The easiest riding - protect it. Even when the car is appear if the tire is driven constantly in car tracks road is sometimes the hardest on standing the strain on the fabri tires. It is possible, under very g abric sand and moisture to work in, thus causing ° ’ though the tire had not been true to him. All the time he tered the garage after a trip over wet roads, the portion g the casing in contact with the floor will not dry and jj the car is to stand anyflength of time it should be raigeq by jacks or blocks so as to relieve the tires of the car’s weight, Notwithstanding all tha has been said on the subject of tire inflation, ninety-nine out of a hundred motorists mp their tires too soft, and the one hundredth one pumps them too hard. When thetire is underinflated it bends. too sharply under the load, and finally the fabric wall crack A The figure at the left shows a tire properly inflated. In the merely means of protecting center is a tire improperly inflated and under load. At the and gives way, resulting in ~ the fabric underneath from - .- fight, an underinflated tire rounding a corner. Here is a blowout. Tires that ar hs the entrance of water and dirt. ~ Sufficient -proof that a tire-should have the right pressure pumped too hard present an i When the casing is new the at alltimes. Don’t guess at your tire pressure; use a gage unyielding surface to the road and the tread is worn away ‘more quickly. If just the right pressure is used, the tread yields to the inequalities of the road, and yet the pressure is sufficient to prevent undue flexing of the side wall, Don’t guess at your tire pressure; use a gage. Very often the front wheels of a car are thrown out od alinement by some trivial accident such as glancing offa curb. This goes unnoticed until hard steering, or excessive tire wear, or both, warn the owner that something is wrong. It is good practice to make an occasional inspee tion. This is a simple enough matter because the front edges of the rims should be three-eighths of an inch closet together than the rear edges. If the car is compelled t pass over newly oiled highways, the motorist: should, immediately after passing through the oil, take steps to remove it from his tires, The best method is to wipe-the tire carefully and then sponge t with gasoline. Oil is very soluble in gasoline and can be removed easily and quickly in this way, Oil spilled on a tire or tube will shorten its life. Tire casings tear and stretch more easily. is severe. If the czr has just en- ‘sand blisters and ultimately a ‘loose tread severe conditions, to wear throug which have been spotted with oil” will weaken it and cause it @ ae oe > | : y a 4
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‘tion of and if > Paised Weight, | that subjeet ty-nine ists run nd the pumps the tire 1ds. too id, and cracks ting in lat sent an he road n away 1e tread ressure le wall, out of ig off a cessive hing ij inspec e front h closer es. lled to ly. st com= uses Of - tracks ; riding dest on very hrough i 1 rubber in a very short time, but ordinarily =, neglect. If it is necessary to drive occasionally over bad roads, reverse the tires or place the side towards the car, vulcanize rubber over the worn pe to protect the fabric from moisture and disintegra- tion, and it will be found that the normal service from the tires will not be greatly affected. ~~ Frequently the pavement along the inside edges of rails is very rough and may result in cuts to the rubber and pruises to the fabric. The elasticity of the rubber permits a cut in the tread to expand when under the weight of machine and in contact with the road. In this way foreign ch as grit, sand and pebbles is forced into the cut. With each caniion of the wheel, this accumulation of matter acts as a wedge and forces itself further between the cover and fabric of the tire. It is not unusual for these lumps or “mud boils,” if neglected, to cause a complete separation of the tread. If garage floors are not kept clean and the tires stand ina pool of oil, the treads soften and the trac- tion strain in service stretches the rubber in a wavy outline. Probably the most damage results from grease in the differ- ential housing work- ing out into the brake drums and thence on to the side walls of the tire. “This may result from loose bearings, too much grease, or from using grease not suit- able for the differ- ential. Knowing how to stop when neces- sary, may be consid- ered to be more important than a knowledge of how to start; therefore, the use of foot and emergency brakes should be most diligently studied. Locking the wheels will not bring the car to an imme- diate stop. The momentum and weight will cause the rear wheels to slide along for a considerable distance and grind off tie tread of the tires in the same manner that street car wheels are ground flat in spots. Avoid letting in the clutch quickly while the engine is racing. Such treatment is good for neither mechanism nor tires. Spinning the driving-wheels in mud, ‘snow, or on slip- pery roads may grind the rubber off the tread and sometimes will snag the cover along the entire cir- cumference of the wheel. You should keep some flake or powdered graphite in the garage, together with When a properly inflated tire runs over an obstruction one inch high Tread worn off—due to wheel out of alinement. Tread scrubbed off, caused by in- use of the brakes How a tire deteriorates. Left, outside view of bruised casing. Middle, inside view showing rupture. Right, the inevitable result if the casing is continued in service an old tin can, a brush and some kerosene. Make a paste of the graphite and kerosene in the can and use the brush for applying it to the rims of your machine every time there is occasion to remove a tire. If you have ever taken off a tire that has rusted fast, the efficiency of this sug- gestion will appeal to you at once. The rim, if never given a coat of graphite, will have to be well sandpapered in order to remove the rust that has accumulated. Tires should be removed at least once, better twice, aseason. Some rust will be found near the valve hole of the rim. Use the graphite and rest assured that when occa- sion demands a change of tube or casing, the tire can easily be freed from the rim. If the tube is pinched between the bead of the casing and the rim, when fitting a tire, the invariable result is the ; bursting of the tube. Such an _ explosion usually forces the bead out of the clinch of the rim at the point where the rup- ture occurs. The in- ference is then drawn that the envelope did not fit properly, but this is probably not true. Itis more than likely that in fitting, two thicknesses of inner tube have be- come pinched under the toe or edge of the bead, resulting in a rupture of the tube at this point. Explosions of this kind _may occur. when the carisstand- ing in the garage. | It is a goed plan tube before inflating by turning the wheel slowly and looking for any projection or unevenness of the casing. If any is found take hold of the casing with the left hand, the palm near the bead, pushing the outer side towards the car. Then, with the thin edge of the spur lever, lift the outer bead and push it slightly towards the center of the rim. If any of the inner tubeis visible, the tube is not in its proper position. In this event push the thin part of the lever under the bead and force the free end of the lever downward to release the bead at that point. Then let the bead settle back into position, making sure that the pinched tube has released itself. Be particularly careful in ex- amining that portion of the bead fitted last. It is presumed that every car owner keeps a little book with rec- ords of the mileage each of his tires has traveled, the quantity of gaso- line and oil used, etc. This is a valuable practice for it tells the owner which make of tire is giving him the best service, and if the car we F begins to fall off in mileage per gal- of lon of gasoline or oil he can run > (casing turned inside down the cause and remedy it. out for your inspection) When an insufficiently inflated tire runs over a similar obstruction to test the fit of a. NX 4 fe i \ hways, diately vil, take is tires, : ipe-the onge it soluble & moved is way. ibe will i : casings vith i e It to ug
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x ' euttifig tools rigidly in their working position at the end - simple, consisting of two or The Pull Tightens the Grip ACHINES fr drilling, reaming, and milling are used in every machine-shop and every factory that works in metal. Sometimes the same machine is used for both drilling and reaming. The adaptation is made by removing the drilling tool from the rotary spindle of the machine and putting in its place the required reaming tool. Even when a machine is used only for drilling or only for reaming, a frequent change of the tools has to be made. For fastening the tools to the rotating svindle a holder or chuck, as it is called in the language of the shop, is used. Speaking in a general way, the chuckis a device for holding drill points, reamers, or other rotary of the spindle. The tools must be perfectly centered; otherwise they will not do clean and exact work. The mechanism of the chuck consists of three, sometimes four, prongs or fingers, which, when the chuck is to be tightened around a tool, move uniformly toward the center of the spindle. The chuck shown in the picture, holding a two-inch While the glass vase rotates, a pointed instrument reamer, is a recent addition to the containing colored liquid traces a design on its surface scores of chucks in the market. Its working mechanism is extremely Tracing Colors on Glass T first glance the machine shown above looks as though it were used ‘for clamping lids on preserving-jars; but then, why does the workman thrust a sharply pointed steel instrument into the jar’s side? No, the machine is evidently not for lids; its real job, we find, is tracing beauti- fully colored designs on glass vases and bowls, It was invented by Maurice Mathy, of Liége, Belgium. The vase is clamped to the center of a plate that rotates. Outside this plate there are several columns which hold the pointed instruments con- taining many colored liquids. These instruments are adjusted at different angles, according to the three broad-faced wedges, which are forced against the shank of the tool by an eccentric cam when the knurled housing of the chuck is turned. The greater the resist- ance offered by the ma- terial in which the tool is working, the firmer will the shank of the tool be, gripped by the holding wedges. One turn of the housing of the chuck by the hand of the operator will re- design to be used. lease the tool. Another tool When work is started on a vase, one instrument is may quickly be placed in the ‘ : ‘ fixed so that its point just touches the vase; then the chuck and securely fastened by ete plate is rotated. As the vase goes round the pattern a turn in the opposite direction. by a simple turn of the hand __ is traced on it. A School of Correction for Airplane Motors IRPLANES are absolutely de- his life to a single motor when he _ the ‘‘school of correction” for airplane pendent on their engines. When attempted the transatlantic flight. engines at one of the manufacturing an engine stops, down comes the air- The accompanying picture shows plants in Great Britain during the war. plane. So when an aviator In the severe tests, often starts on a long-distance : : extending over a_ period flight over water, or over g : 4 of days, if conducted in- country too broken to per- doors, the continuous roaf mit of a safe landing, he of the engines and the is making an extremely overpowering stench from hazardous bet against fate; the exhausts would have he wagers his life on the efficiency of his engine. Such flights require, not only unusual physical courage, but a supreme confidence in the flawless- ness of the material and the perfection of the work- manship of a complicated pieceof machinery. Nothing could better il- lustrate these truths than the almost foolhardy aban- don with which the British. In these little huts airplane engines are put through value to the development aviator Hawker intrusted their paces to test material and workmanship of the airplane industry placing of a number of en- the trial offered the advan- tage of comparison between the working of the indi- vidual engines, and _per- mitted a careful study and of the tests. The results of the examinations in this “school of correction’’ have been unendurable. The gines side by side during verification of the results since proved of inestimable - > | i i — i | { ; | t ‘| | | | { | ‘= | | | a — — — — | — | : |
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Do We Talk Too Much? Look at This Record! The telephone wires alone carry thirteen billion words for us in twenty-four hours If all the telephone conversa- tions that take place in the United States during a day were recorded on one phonograph cylinder it would have to be so large that the Leviathan could sail through it; in other words the giant record of conversation would have to be one thousand two hundred and eighty feet long and would have a diameter of four hundred and sixty-five feet If our telephone conversations were-taken down on typewriters, an army of 150,000 expert girls would be kept busy night and day, without a moment’s respite, to record the nine million words or so coming over the wire every minute (on an average) of the twenty-four hours me | é 4 :
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The Death that Lurks in Dope Drug-taking costs $150,000,000 a year through loss of work. Every year at least $61,000,000 is spent for dope By A. M. Jungmann AVE you ever had a toothache ? H Do you remember how black the world looked while the torturing pain set every nerve in your body on edge? You would not want to face another toothache, if you could help it. Certainly you would not go out of your way to acquire one. Yet the misery you suffered was as nothing compared with the agony the drug addict brings on himself through the use of drugs. Anyone, even partially sane, would let narcotic drugs severely alone if he knew what their use surely entails. Here, in the United States, drug addicts are paying over $61,000,000 each year for drugs to satisfy addict —this exclusively of the drugs used for medicinal purposes by hospitals, physi- cians, and dentists. It has been esti- mated that there are between one and two million addicts in the United States. If we take the conservative estimate of 1,000,000, we find that 250,000 of them, or twenty-five per cent, are not employed in gainful occupations. The committee appointed in March, 1918, by the Secretary of the Treas- ury, to study the traffic in narcotic drugs, stated in its report that the country loses in wages $150,000,000 annually through the loss of the work which would be done by the 250,000 addicts who are idle because of the drug habit. This does not in- clude the other expenses attendant upon the drug evil, such as losses through theft and burglary, the costs to the States and cities in criminal cases, and the care of those persons who become public charges. This, then, is the price paid for the privilege of suffering torments that outrival those described in Dante’s Inferno. Putting on the Shackles Once addicted to the use of nar- eotic drugs, a man becomes helpless, a slave to the thing that is killing him. He cannot break the habit without outside assistance. You might as well expect a man to saw his way through prison bars with a eake of soap as to expect a drug addict to escape the clutches of his drug unaided. And it is so pitifully easy to be- come an addict. The use of 3 narcotic drug daily for ten days will the country do it in some cases; in others, it may take as long as thirty days. Then it becomes neces- sary for the addict to take the drug to relieve himself from physical pain. As soon as the effect of one dose wears off, his suffering drives him to take another. Addiction is a secret vice which may be found anywhere in society, from the millionaire to the furtive dock rat. All addicts are not crimi- nals, although it would not be stretching a point to say that the truth is not in them. The millionaire usually can procure his drug because he has the money to pay for it. The worst crime he may find it necessary to commit may be a lie in order to get his supply, while his brother in misery, the dock rat, will be driven to theft in order to pro- cure his. Some drugs, notably heroin Getting ready for a dose. The man is using a homemade hypodermic and is holding it in his mouth (a most unsanitary thing to do, for the needle should be sterile)- while he is “cooking his pill,” morphine dissolved in water, in a teaspoon’ (called the “‘stove’’) by holding a lighted match underneath it This type of addict is in the habit of putting cocaine and heroin on his hand and sniffing it Inside of a year his nose will break down: sniffing causes an ulcer that destroys the bone and cocaine, seem to rouse in their victims an appalling criminal ten. dency. Hideous crimes, such as the “ripper’’ murders and similar atroe- ties, are generally committed by drug fiends. Dr. Perry M. Lichtenstein, physi- cian to the City Prison in New York, generally known as the Tombs, ha had under his observation 12,000 drug addicts. He has made an ex. tensive study of the physical effect of drugs. He has noticed that first of all the addict becomes careless of his appearance. He loses all desire for cleanliness, and even persists in using a drug that he knows will dis- figure him. The ‘Saddle Nose” A normal person will do glgnest anything to prevent his faee #rom becoming so disfigured that people will look upon him with disgust, and certainly he would not wilfully court disfigurement. But the drug addict continues to sniff cocaine, or heroin, when he is perfectly aware that the result will be a “saddle nose,’”’ a hideous facial deformity. notices a feeling of coldness and numbness in his nose. When the effect of the drug begins to wear off, he experiences the sensation of having a cold in the head. His nose feels clogged up. The drug first has a peculiar effect on the blood- vessels in the lining of the nose. It causes them to shrink. As soon a this effect wears off, the irritated When either heroin or cocaine is _ first sniffed, the user of the drug | — — ory | ~ 3 — —
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f a yeu will break sniffing ulcer that | the bone in their nal ten. h as the r atroci- by drug 1, physi- ww York, mbs, has n 12,000 le an ex. cal effect that first 1reless of all desire ersists in -avill dis. 9 2ce ‘from t people rust, and wilfully the drug caine, or ly aware “saddle rmity. ocaine is he drug © ess and ‘hen the wear off, ition of His nose rug first e blood- ose. It soon a8 irritated -vessels dilate and the delicate sree! of the nose swells. This causes the clogged-up feeling. The unhappy victim wants to breathe easily, so he promptly takes another sniff of his drug. Finally he finds that his nose 10 longer clogs up when he sniffs. Nature’s Toll But outraged nature exacts her toll for the treatment to which he has sub- jected the blood-vessels and the lining of his nose. An ulcer forms. This causes the nose structure to break down; a perforation of the septum, the bone of the nose, follows. The ulcer forms just at the joint where the bony Three quarters of the drug fiends who have come under Dr. Lichten- stein’s observation have suffered from bronchitis, a disease that frequently leads to tuberculosis. The use of drugs causes breathing to slow down. If enough air is not supplied to the lungs, the lung tissue weakens and lesions may appear. Frequently, the use of narcotic drugs so affects the respiratory system that the addict breathes only one quarter as often in a minute as a normal person. That means that his lungs are getting only one quarter as much air as they need. The lung tissue thus weakened is a ready prey for germs. is enfeebled, and altogether he has a sorry time of it. He craves relief and seeks another dose. When in — need of cocaine, he has the madden- ing sensation of insects crawling un- der his skin. Dullness the Penalty The drug addict, especially if he takes morphine, heroin, cocaine, or — chews yen shi, loses weight rapidly. This is due to the fact that he does not eat the normal amount. As opium and its derivatives all have a tendency to decrease the secretions and to slow down the bodily functions, the addict does not elimi- and cartilaginous sep- tum join. The result is a nose that appears to have been smashed. The addict who sniffs cocaine may ex- pect a perforation in one year. If he com- bines cocaine with he- roin, the condition will be brought about in less time. The action of heroin is slower than that of cocaine. nate the toxic sub- stances from his body as does a normal per- son. The penalty for this is dullness, much headache, and dizzi- ness. The heart is severely affected by the use of drugs. Large doses cause paralysis of the heart muscles. If a fiend is unable to get the drug he has been taking, he may die suddenly from acute ‘dilation of the heart. The mental effects = An addict hypodermic his clothes. or Tombs. ries in dirt and causes horrible abscesses Dope utensils taken from prisoners in the New York City Prison, The collection comprises a wooden ‘‘dope-box”’ con- taining cocaine, morphine, or some other soluble narcotic, several hypodermics; a spoon for heating; and two’bottles of dope pills - The drug addict soon grows to care raore for his drug than he does for anything else in the world. Without it he is in misery, often in physical anguish. In order to avert suffering, he uses more and more of the deadly drug. Finally, he becomes so careless that he pays no attention to his food and actually goes with- out eating for long periods. In this way he lowers his vitality and reduces his powers of resistance till he becomes an easy victim to disease. Cocaine, a commonly used drug, stimulates both mind and body. The ad- dict, when under the in- fluence of it, imagines him- self capable of anything. pays no attention to what goes on around him. He cannot sleep. Cocaine ad- dicts will go for as long as seventy-two hours without sleeping. After this effect using the wears off, the addict is completely exhausted, both mentally and physically. His head aches, his intellect He forgets his cares and - of drug addiction are distressing. Fiends are generally neurotic and frequently suffer from delusions and hallucinations. These often take the form of delusions of persecution and marital infidelity. Murders have been committed by dope fiends who enter- tained such delusions. The addicts who use the hypo- dermic needle get vile sores on the sur- face of their bodies. Sometimes the skin appears to be covered with a rash; sometimes abscesses are formed. Addicts will pass a hypodermic needle from one to another, thus trans- mitting disease. Often, in their haste to get the dose they crave, they will jab themselves with the needle right through their clothes. This leads to foul, pus-filled abscesses. If an addict cannot get the drug when he wants it, he is sure to suffer. He seems unable to stop yawning, his eyes and nose run, he cannot control sneezing, he itches so that he wants to tear his skin off. Sometimes the trouble is more severe and takes the forms of vomiting, diarrhoea, a rapid pulse, clammy sweat, and other dis- agreeable symptoms. The Children of Addicts Drug addiction usually results in sterility. But if a nursing mother takes drugs, her baby will become an addict through taking the drug vith ~ re | | ‘ a 7 th — i
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the mother’s milk. Several such youthful addicts have come under the observation of physicians. When the drug is taken away from it, an infant will present all the withdrawal symp- toms shown by adults. Opium-smokers show a marked perversion of the -moral sense. They suffer in a manner similar to . that of the users of morphine and heroin, although the action of mor- phine is greater than that of opium, from which it is derived, and the action of heroin greater than that of morphine. - Heroin is several times as powerful as mor- phine. Cocaine, derived from coca leaves, differs in its-effect from opium and its derivatives, in that it does not produce sleep, but on the contrary causes an exhausting insomnia. Addiction Is I’ nereasing It has been said that drug ad- diction is increasing in the United States. Many of the larger cities show an increase in the number of persons using narcotic drugs. The report of the Special Committee of Investigation states: “What effect, if any, nation-wide prohibition will have on the situa- tion could not be definitely deter- mined by the committee. The consen- sus of opinion of those interested in the subject appears to be to the effect that the number of addicts will in- crease as soon as the prohibition laws are enforced. “These opinions are based, for the most part, on the theory that drinkers will seek a substitute for aleohol and that the opiates and cocaine will te found to be most satisfactory for this purpose. ‘This opinion apparently re- ceives some support from investiga- tions made in some of the Southern States, where prohibition has been in effect for some years. It has been noted that in these States the sales of narcotic drugs and cocaine, and es- pecially the sale of preparations exempt under section 6 of the Harrison Act, such as Bateman’s Drops, Godfrey’s Cordial, and paregoric, have greatly increased during this period. “Whether or not this condition will become general when national prohi- ‘ bition becomes effective is a question which cannot be answered at the pres- ent time.” . Drug addiction is a social vice. It is acquired, in the majority of ‘cases, through association with an addict. One of the startling facts regarding drug addiction. is that it numbers among its victims so many minors: Boys and girls of from ‘sixteen to eighteen years of age have been found to be confirmed drug-users. The age French in 4, ‘Austrian in of addicts ranges from the babe in arms to the person of seventy-five years. Most of the heroin addicts are young, many of them under twenty years of age. The cocaine addicts, too, are said A drug-user trying to break the habit by the Chinese reduction treatment, tak- ing the narcotic in greatly diluted form to number many who are adolescent. The persons who are given to addiction have a wide range of occupa- tions. According to the report of the Special Committee of Investigation, one of their questionnaires showed that: “The occupations of addicts in the order of their frequency are re- ported as follows: Housewives, laborers, physicians, salesmen, actors and actresses, unemployed, busi- ness men, nurses, farm- ers, office workers, professional men and women, prostitutes, pharmacists, ‘dope’ peddlers, mechanics, merchants, gamblers, newspapermen, and printers.” And: “The nationality of addicts, where such information was given, is reported as American in. 94 in- stances, German in 10, Irish in 8, English and Scotch in 6, Jewish in 5, 3, Russian and Grecian in 3, and Mexican in aie Even prison wails form no sure barrier against the very drugs that-may have put the’ prisoner behind them. In spite of every precaution, the “dope fieng” in jail often manages -to Procure more or less constant supply of his favorite drug. It is comparatively easy to’ thwar attempts to smuggle in liquor or ¢, tools desired bya would-be jail-breaker but the, very nature of the drugs de. sired by prisoners makes them easy to conceal, and the mogt innocent appearing callers on the man who is ‘‘doing time” must be suspected. The linings of Vis- itors’ coats, the seam in a skirt cigars and cigarettes,—even cake of soap,—have been known to hold small quantities of heroin cocaine, or morphine. The Situation Is Serious « When you consider that the’ United States consumes annually 470,000 pounds of opium, that 150,000 ounces of cocaine can be made from the coca leaves weim: port each year, and that twenty. five per cent of this is used for legitimate purposes, it begins to look as though the drug situation were decidedly out of ®ontrol, It has assumed such seri@us pros portions that we cannot. close our eyes to it any longer. It hag become everybody’s busivess. 4 ‘ Dr. Lichtenstein, of the Tombs, administering ae reduced dose of morphine to an addict under his care as the first step in effecting a cure | ~ — po — ge — 4 3 | — *
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Getting the Dope Across Prisoners’ friends are always finding new ways of smuggling in drugs A dope sandwich is made of two-dollar bills for bread, and dope for filling; the bills are pasted together, and often get by the keeper’s eye as one. A post-card may be parted at the corner and treated in like fashion There’s tobacco at both ends, but dope in the midcle; when even cigarettes must be searched, you can easily believe that a well-developed habit of suspicion is a great asset to a keeper Even in the heart of the keepers find the dope; one prisoner brought in entirely too many cakes of soap even for the height cleanliness, and the keeper grew suspicious. He cut open a bar and found a neatly drilled le loaded with dope Evidently the fellow who owned this overcoat hadn’t been in jail for quite a while; he thought he would get away with the old-time trick of sewing dope into the lining of his coat. But the lining was searched and the dope found, as the above picture shows for the prisoner. A basket of fruit arrives No one - would suspect an apple or orange of dope complicity, yet it was found that all the fruit had been charged before it was sent to the jail. A hypodermic needle such as the one above was used for the job fiend” Cure a of his th reaker. igs d : ‘a on the | ontrol, ] raphs © Keystone View Co. F 4 ~ a i =
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Do It with Tools and Machines Save your energy and at the same time speed up work RACK AND Pinto! SUPPORTER 4 ] Above is a special tool for i 4 cutting hand-holds on ships’ d N It is operated ft ‘ N \ air-pressure and does the u A gage rated on the fluid it ‘ work in one fifth the time re. for the operator to see in- | } quired by the old method . stantly, without magnifica- N dred thousandth of an inch met \ The daredevil clinging to the girder on top entirely of oa of the Woolworth Building evidently knows pieces of scrap- he is standing upon a drop forged wrench iron. It is, how- This anvil is so- ever, none the constructed that less practical it may also be used as a vise. The forge is at- tached to the side within easy reach con grin Sheepskin gauntlets with the of down his work without hav- wool side out protect the — as ing to hoist it within ranze wrists and forearms of men who must handle sheet-iron. 4 ve 4 This time-saving screw The plier wrench, which = adjustment takes care of has no adjustments, is a the wear on the cutting . semi-automatic and self- points. It is not neces- This bolt-heading machine was designed and made from old adjusting to any size nut sary to readjust the tools materials. Bolts ranging from °< to 13¢ inches can be headed or pipe clamped in its jaws @ . 4 4 ‘WOICATOR FOR & —GLASS TUBE }
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Housekeeping Made New inventions that simplify housework arance the double- — bag differs little from the ordinary one. The upper part is hinged to swing aside and give access to the lower part A special gas-burner slides under the tub to heat it. The water can be made to flow either in or out by a special faucet attachment and the tub itself is portable A mop-wringer, attachable to a wood or metal pail, enables room. bird occupies very little space This simple device enables the hired man, or husband, to For your pet canary comes this oddly shaped bird-cage, so designed that it may be fitted into a corner of the In this way the the housewife to stand while wringing water from the mop A fireless cooker for soup may be made from an ordinary thermos bottle. Before the vegetables are quite done they are put in Sometimes a sewing-ma- chine is so placed in a room that its needle can- not be threaded on ac- count of poor light. Why ‘move filled ash-containers u an ordinary flight of stai the bottle and cooked for an hour firelessly, thus saving considerable gas not attach a pocket flash- light to the machine and OF STEEL : : y light it when necessary The frame is hinged to a bread-board in order that a loaf of bread may be sliced evenly and more conveniently Here is something long wanted by every cook, a bread-toaster which toasts all sides of two slices of bread simul- taneously when placed over the gas-burner There are no breakable parts in this vacuum bottle, for it consists of two chambers of Steel, an insulated vacuum Space, and welded connections When you need a stiff broom, this new broom- bridle will make the old broom fill the bill iE the VACUUM SPACE || | | | - =, &
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They Are Doing Business on HE more luxurious trains of the United States have all the imperial comforts and conveniences of a hotel. Do you need a shave or a_hair- cut? Walk this way to the barber-shop. Do you want to read a book? Here is the library. Have you a mass of business correspondence that you were compelled to take with you? Ring for astenog- rapher. She will take your dictation and deliver your letters to you neatly type- written before you step off the train. Will you miss these con- veniences when you travel between New York and Chi- cago on the wing instead of on rail? Not if the successful experiments recently made by enterprising European air- plane builders are any indica- tion of what the future holds forth. Two British firms have demonstrated conclusively that when the fuselage of an airplane is completely enclosed, as it should be for the sake of comfort, you ‘ travel in effect in an aerial Pullman. The British Aerial Transport Com- pany has built a four-seated biplane Reaching TUDENTS of aviation soon learned from experience that the condi- tions existing in high altitudes exert a ‘ powerful influence on the efficacy of the engine of the airplane rising from some point near the sea-level. They realized that the diminished pressure of the rarefied air at great heights is the Wing which has a roomy cabin heated by the engine exhaust and which is ventilated either by slightly opening the windows or a sliding door at the rear. The cabin is fitted up like an office. In one end you find a roll-top desk. The Westland Aircraft Company, High Altitudes in the Laboratory vision was made for making it possible to test airplane engines and aviators in the laboratory under artificial condi- tions closely resembling those which they would have to meet in high altitudes during flight. The accompanying picture gives a the cause. Obser- vation also taught that the sudden change from the The British Aerial Transport Company has recently built a roomy four-passenger ma- chine in which you can while away the fly- - ing hours by dictating to your stenographer “Dictated in flight between Lon- don and Paris,” she writes at the bottom of the letters that she has transcribed speeding through the air also a British firm, has built a ninety. © mile-an-hour three-passenger enclosed machine in which you are almost as comfortable as you would be in your own office. If you have the price, take your secretary with you. The air. plane, in a sense, becomes your office, view of the low-pressure chamber which is used at the Mineola labora- tory to test aviation students under high altitude conditions. It is a — cylindrical steel tank, eight feet in — diameter and ten feet high, large | enough to accommodate five or six in- © vestigators at the same time. A full comparatively high atmospheric pres- sure at sea-level to © the low pressure in high altitudes causes certain dis- turbances in the functions of the human mechanism which may seri- ously endanger the aviator. The necessity of making a careful study of the effects of diminished air- pressure on engines and human beings was recognized by the military -au- thorities carly in the war, and pro- with the door of the chamber open The investigator is here shown in the act of making a blood-pressure test Through the window of thick glass the operator can plainly see everything that is going on inside the chamber sized door is pro vided, which may be hermetically closed, also several observation dows of thick glass. The chamber is il luminated by elee- tric light. A motor-driven vacuum-pump ek hausts the air of the chamber ‘through a 3-ineh pipe at the top and in about five min- utes a rarefication of the air may be obtained, equal to that existing at al altitude of 35,000 feet above sea-level. While the air withdrawn at the top fresh.air in at tae nottom ; \ | the flig hit up wl pa sci all fol se e dc bi he de Te >. : :
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HILE very seriously intended W as a public service vehicle of 7 great speed, charm, and safety, the monorail flier invented during all the horrors of war, in 1915, by Francis Laur, C.E., of Paris, and only recently ‘released from the United States Patent Office, is little more than a picture in so far as its value for practical transportation work is con- cerned. It is the offspring of “sirplane’ and “monorail, two young ideas sprouting wild shoots in a lively imagi- nation on the plan of “‘you never can tell.” The inventor himself says that the notion of “guided flight’? was what inspired him; but most engineers look upon this notion as an idol with feet of clay and wings of paper. The original mono- rail car, balanced by gyro- scope, and the untrammeled airplane, free to strike out for any destination, inspire separately more than in com- bination. Guided Flight The Laur monorail flier does not figure out well financially or aeronautically, but a kind Providence may have reserved for it a useful destiny nevertheless, and one replete with scientific distinc- tend to lift the car off the rail. Fearing that such a thing might ac- tually happen, the inventor mentions a flange whose function is to prevent this catastrophe (but unfortunately’ the flange, as he describes it, is me- tion, because “‘guided flight’ is useful in science for experi- mental work. The plan includes a founda- tion structure somewhat simi- lar to one side of an ele- vated railway, and with a single rail on top. There are two guide rails farther down, one of which carries an electric current. An egg-shaped car that seems to measure 20 to 25 feet across and 40 to 50 feet in length has a basement space for baggage, a main floor for some thirty passengers, a floor above for electric motors and other machinery, and a floor for operator and lookout at the top. It is split a little more than half- way through from below to straddle the top rail, on which it rolls by means of two wheels, and is equipped with in regular airplane fashion. is confined to a definite path by a rail. flight,” Laur, the inventor, calls his idea. tical? Maybe and maybe not. for some things it is and for some things it isn’t. the article will tell you more about the practical side Francis Laur would combine the airplane with the railway. An egg-shaped car with short wings is driven chanically impossible). The slot in the four-story car is widest at the middle so as to admit of gentle curves of the rail and foundation structure. The troubles to be anticipated are practical. The foundation structure is most expensive, especially at curves where it would have to be leaned in- ward very carefully to take up the centrifugal thrust of the high-speed flier. The propellers would have to be of enormous diameter to start the heavy car half as rapidly as it might Instead of flying away it “Guided Is it prac- Which is to say that He Dreams of Flying on a Rail And while we shall never fly with him, science may find some use for Mr. Laur’s invention than any that need be caused by wheel friction if no wings at all were used. But, after all, if the railway could be made cheap enough, the car light enough, the wings and the pro- pellers large enough and more suitably disposed than the designer shows them, the Laur monorail flier would not be impossible, and this reflection leads to an inter- esting and redeeming feature in the scheme. Pocket Edition It might be materialized in toy size, with considerable re- modeling in its proportions, and turned to account for scientific’ testing purposes, bidding fair to outdo in utility the costly wind-tun- nels in which models of wings and propellers for air- planes are now tried under artificial conditions. The present tests do not approxi- mate real flying conditions closely enough to permit safe conclusions, except by scientists so eminently skil- ful that they may undertake to calculate the necessary allowances for errors. On a circuit of a few hun- dred feet the Laur flier in pocket size could be arranged to tell many things of wings, ’ their curves, angles, and as- pect ratio, and of propellers, _their efficiency and their slip- streams—many things that ‘have so far remained clouded But in uncertainty. The general plan allows many variations _ of details, leaving only the monorail—mounted on a board fence, perhaps—as a fixed feature in such a testing plant. As an adjunct to the wind-tunnel, rather than as a competitor, the scheme might be accepted even more readily, affording new means for checking up conclusions and comparisons. The divided skirts of the car could evi- dently be used as receptacles for variable loads, including fine measur- ing instruments, and lift could be recorded with the aid of rollers under a-level. propellers and airplane wings in the be started by connecting the electric the guide rails. } air. is way the illustration shows. motors to driving wheels running on Thus an invention none too wise at the .A lever mechanism is provided, the rail. The wings, when turned toa may in the end become the basis for : - comes enabling the operator to turn the good angle for lifting, would encounter important improvements in the great a sotton Wings to an angle at which they will greater resistance from the atmosphere art of aviation. : | ; has Office, ‘ A full- is pro- h may ¥ ‘ically several 1 win- glass. |. or is il- y elec- -driven np eX air of m ber 3-ineh op and min- fication nay be qual to at aD = 35,000
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and power plants and look around you. As you approach the plant you pass enormous coal piles and on the spur track leading to the yard of the plant there may be cars with more coal not yet unloaded. The potential energy of all this coal is transformed in the plant into electric energy and made available for purposes of light, heat or power. How is this done? The coal is burned in the furnace. The heat liberated transforms the water in the boilers into steam. Thesteam drives the engines and _ these drive the dynamos that generate the electric current. By passing through this cycle the energy carried to the earth by the sun’s rays and stored away in the form of coal, perhaps millions of years ago, is transformed into electric- ity. for lighting our streets and houses, driving our machinery and helping man’s progress in a thousand other ways. Where Energy Is Wasted But the .potential energy of coal and other fuels is far greater than the actual or working energy we obtained by this indirect method. There is a great loss of energy in our furnaces from imperfect com- bustion and radiation; in our boilers and pipes from insufficient or defective insulation; in our engines from faulty onstruction, im- perfect workmanship, vibration and friction. How can this waste of energy be avoided? Many scientists have studied the subject and several of them have achieved a fair measure of suc- cess by employing electro-chemical methods. It has long been known that in many chemical processes electricity is generated and in the majority of electrical batteries the oxidation of metals is used for generating elec- tric currents. In the Daniells cell, for instance, the negative plate consists of metallic copper, the positive plate of zinc. A solution of copper sulphate forms the electrolyte, acting as an intermediary in the electro-chemical reactions which take place in the cell. What happens in the cell is briefly this: the sulphate of copper is broken up into its constituents, the copper being deposited upon the negative plate of the cell. The oxygen of the el one of the big electric light sulphuric acid, liberated by the de- Electricity Direct from Fuel Doing away with the intermediate steam boiler, engine and dynamo By Ernest Welleck composition of the copper sul- phate, attacks the metallic zinc of the positive plate and oxidizes it, forming zine oxide. The oxide of zinc, in its turn, is converted by the sulphuric acid into sulphate of zine which passes into solution, gradually supplanting the sulphate of copper in the electrolyte. The scientists argued that carbon, AIR INLET having a greater desire even than most . metals to combine with oxygen, and hydrate. he sodium hydrate is melted being much cheaper, might be sub- stituted for the metal of the posi- tive plate. The eagerness of carbon to combine with oxygen makes coal the most valuable fuel. When coal is burned in the _ presence of air, for example in.a well draw- ing stove or furnace, it is really oxidized. The carbon enters into combination with the oxygen and forms a gaseous oxide which es- capes through the flue. But this direct oxidation transforms the potential energy of the fuel into heat, not into electricity. Oxidizing Coal - Different methods have been suggested for generating electricity by the oxidation of coal, coke or other carbonaceous fuel. One in- ventor, Sidney H. Short, of Cleve-. land, Ohio, proposes to use coal, coke or other carbonaceous matter REACTION’ CHAMBER. WATER. INLET PIPE Thomas A. Edison proposes to generate electricity by oxidizing white-hot iron powder with steam or water or by heating a mixture of carbon and oxide of lead In Sidney H. Short’s generator molten lead is ~ the negative element, coke or coal the posi- © tive, with oxide of lead as the electrolyte _ tion of an electrolyte, preferably sodium as the positive, and lead as the neo. tive element, with lead oxide ag ele. trolyte. The carbon and the lead are in separate and insulate containers, so placed that the layer of oxide is always in ep. tact with both the metallic legg and the carbon. Heat is appli which melts the lead and caugg — the carbon to glow. Air is foree — into the apparatus to aid the reg. _ tion by oxidizing the metallic lead to lead oxide, which, in tum, gives upits oxygen to the glowing carbon, forming carbon dioxide, which is allowed to escape. The carbon is gradually consumed and must be’ replenished from time to time. There is practically no log of the lead because the oxide formed is almost immediately re duced to metallic lead by the © deoxidizing effect of the glowing carbon. Carbon plus Sodium Hydrate William W. Jacques and other inventors propose to transform the potential energy of carbon into electrical energy by oxidizing the carbon through the interven- ELEC. TERMINAL CONDUCTIVE . MATERIAL : i : FEED, WATER = INSULATION, | \ ELECTRIC, CIRCUIT: ii STEAM FLUES- | TO PUMP. | ] = ~ a = —
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applied is forced the rege. i metallic in tum, glowing dioxide, pe. The med and time to Y nO logs 1e oxide iately re- by the glowing lydrate nd other ransform carbon oxidizing interven- y sodium is melted TERMINAL DUCTIVE . TERIAL TRORYTE 4 _ FUEL GAS ) ASBESTOS TUBE Electric current is produced by forc- ing fuel gas through a hot solution of sodium or potassium hydrate in the generator invented by James H. Reid and is kept in violent motion by a blast of outside air, forced into the molten mass through numerous fine The carbon is in direct contact with the molten sodium hydrate and, at the high temper- ature of the mass, combines with the oxygen with which the hydrate issurcharged, forming carbon dioxide openings. which escapes through the flue. James H. Reid, and others, use fuel gases, like water gas, carbon monoxide or the escape gases from furnaces, illuminating gas, etc., in the place of solid carbon. The gas is forced into the apparatus and is brought in contact with sodium or potassium hydrate, cuprous chloride or some other oxygen-bearing elec- trolyte at high temperature, as it passes through the porous walls of carbon tubes immersed in the elec- trolyte, which must be plentifully supplied with air. What Edison Proposes Thomas A. Edison has obtained a patent on a method of generating electricity by dry chemical reactions. The reaction may be either the oxi- dation of a metal or the reduction of a metal oxide. Finely divided iron may be oxidized by heating it to incandes- cence and then passing steam over it in a cham- ber the air of which is kept in a rarefied state by an air pump. Or, a mix- ture of oxide of lead and finely divided carbon may be heated to in- candescence, reducing the lead to the metallic form and causing the oxygen of the oxide to combine BAFELE' PLATES with the carbon te ‘orm a gas which is removed by the air pump and may be forced into the furnace to be used for heating the apparatus. A more complicated method is employed by Hugo Jone, who has obtained patents on two pro- cesses for obtaining electric energy from fuel gas. He uses water gas or ordinary illuminat- ing gas and metallic tin, with sodium or potassium hydrate and mercuric oxide as the elec- trolyte. At high temperature the tin is attacked by the hydrate and oxidized. The oxygen is taken from the mercuric oxide which is thereby changed to mer- curous oxide. The oxide of tin is reduced to metallic tin when it is brought in contact with fuel gas at high temperature. IR- TIGHT, WORKING CIRCUI TOP INECTOR ELECTR <! ODE CONNECTOR. WATER PLATINUM ELECTRODES Olof Dahl produces current in a divided cell with acidulated water as the electrolyte. He uses two platinum electrodes, one of which is brought in contact with oxygen, the other with hydrogen on either side of the division ELECTRIC CIRCUIT CONNECTIONS” ELECTROLYTE” INLET PIPE WASTE PIPE W. W. Jacques forces a current of air through a boiling mass of molten sodium hydrate in which a cylinder of carbon is partly submerged The mercurous oxide is recovered and changed back to mercuric oxide by chemical treatment. It can then again be used for the oxidation of tin in the apparatus. A Swedish Method Olof Dahl, a Swedish inventor, uses a slightly different method. He heats coal or coke to incandescence and then passes steam over it. The steam is decomposed and a mixture of hydrogen and carbon dioxide is formed. This is conducted through a purifier con- taining hydrate of lime. The lime combines with the carbon dioxide while the hydrogen is collected in a tank. Oxygen is obtained by heating in earthenware tubes, in a current of steam, sodium manganate, which gives up part of its oxygen, while at the same time caustic soda and a lower oxide of manganese is formed. The oxygen is collected in a separate tank. Electric energy is generated by bringing the hydrogen and the oxygen, separated each from the other by a dividing wall, but both OXYGEN This shows the arrangement of a plant for generating oxygen and hydrogen for use in the gas battery invented by Olof Dahl. Producer gas is em- ployed as the fuel in both processes in contact with the same body of acidulated water, in electrical relation by platinum electrodes im- mersed in the acidulated water, one on the hydro- gen side the other on the oxygen side of the divid- ing wall. In all these methods electric energy is obtain- ed from fuel directly, without the intervention of engines and dynamos. That means greater economy and efficiency, because there less opportunity for loss of energy by leakage. It has been established by tests that by connecting a number of these gener- ating elements or plants in multiple-are series or multiple series any de- sired quantity or tension of electric current may. be obtained. j 7 | ; at the | H GLASS AIR lead is posi- rolyte
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-automatically opening and A Metal that Bends When Heated AT are they watching with ' such interest? They have just placed a strip of a peculiar metal, with two heavy books resting on ‘it, on a hot radiator. The metal curves under the influence of the heat, the upcurving ends of the strip gradually lifting the books an inch or more. If the experiment had been made with a piece of ice instead of a hot radiator, the metal would have curved, but in the opposite direction. The ends of the strip would have re- mained on the ice, while the middle part would have curved up, forming an arch supporting the weight of the books. Not every metal acts in this way when heated or chilled. In fact, no single metal does. The strip consists of two plates of metals welded to- gether. These two metals have what the scientists call different coefficients of expansion. That means, in plain language, that one of the metals ex- pands more under the influence of heat and contracts more when Placed on a hot radiator this strip of metal will curve sufficiently to lift several books OWN cn one knee with his arms flung out, the man in the picture would seem to be a teacher of gymnastics. On the contrary; he works in a shipyard. The reason for his present pose is that he is demonstrating the ex- cellence of the new padded winter suit for outdoor which the shipyard has re- cently adopted for its em- ployees. In spite of its padding it affords the wearer plenty . of room in which to move his arms and legs. ‘The suit fits snugly at the ankles and wrists and pre- vents the cold air from getting in. There is a _ large, close-fitting collar which may be pulled up over the ears, and three convenient patch pock- ets. The material of the Three-Layer Suits for Winter Snug at the wrists, ankles, neck, and waist, this comfort- able padded suit will keep him warm in the coldest weather suit is in three layers: the ; layer is of closely woven cotton lott” next comes a layer of padding—eighty per cent cotton, twenty per cent wool: the third layer is cotton cloth, again The United States Bureau of Stang. ards thoroughly tested a guyit for tensile strength, heat transmission permeability to air, and water launder. ing, and found that it was good. The tests for heat transmission and for permeability were made jin comparison with the standard five pound blanket used by the United States Army. It is claimed for this style of cloth- ing that it permits the wearer to enjoy all of the benefits of out-of-door work without experienc. ing the discomforts incident to severe weather. Welding with the Electric Arc LECTRIC welding is employed in many of the metal industries, and in many cases is given preference to~ the welding by means of the oxy- acetylene flame. The cost of welding by electricity is smaller than that of welding by the oxy-acetylene process, yet many manufacturers hesitate to introduce the electrical method. The principal reason is that this method requires direct current for its successful operation, and where such = current is not available it is necessary to instal a -alternating current. generator, the initial cost and cost of —~ maintenance of which are considerable, This difficulty has been overcome by the recent invention of an electric welder which makes it possible to use The compact and easily transportable welding plant consists of an oil-cooled transformer completely enclosed in a dust-proof container and equipped with an easily controlled regulator by which the current can be accommodated to the requirements of the work to be done. chilled than the other. As the two plates are welded together and therefore in- separable, the strip will form a curve, with the more sensitive metal on the out- side of the curve when it is heated, and on the in- side of the curve when it is chilled. This peculiarity of such welded strips has been utilized for many different purposes. It has been used in instruments for measuring temperatures, for closing heat vents and for counteracting the effects of heat or cold on the metallic parts of scientific instru- regulated by this adjust- able transformer prevents excessive arc length and hence burned welds. The are will be extinguished whenever an attempt is made to lengthen it be yond three sixteenths of an inch. The welder requires no preheating of the object to be welded. Within reason- able limits the length of the arc, and hence the welding temperature, can be ad- justed to the requirements of the work and the same temperature maintained during the entire operation. No current is lost by leak- age or wasted in heating The stability of the current ments of precision. A famil- iar application is a compen-. sated watch balance-wheel. The transformer enclosed in the dust-proof box makes it possible to use alternating current for arc weld- ing, saving the cost of a direct-current generator resistances. This means considerable saving in the cost of welding. | — iio o i — q | y | i fi i — t at | 4 M — — — ; # | on ( — i — | —
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_attack? If you are free from all of these little trials you are singularly fortunate. Most of us have tasted them. Then why expect that the mind shall go scot free from minor ailments? In point of fact, of course, it does not. There is, for example, that harrowing ex- perience of having a tune ‘‘run through your head.”’ It usual- ly is some silly jingle that you would give anything to rid your- self of. Sometimes it is a line of poetry, or perhaps some mean- ingless phrase. Efforts of the will to banish the offending theme from one’s mind are of little avail. Usually, after a while, the ‘‘attack’”’ wears off of its own accord. It is true that in some persons such an obsession takes on a violent form, robbing them of sleep and rendering them positively ill. The thing may even go further than Given a box of blacking and a brush, this-man applies it to his hair instead of his shoes. The ~ main switch of his mind ‘is short - circuiting that, as in the case of one man, who was so completely under the control of his obsession that he just had to sing his tune aloud in the middle of the night. Not only he but his relatives were losing sleep. Such a case as this is, of course, beyond the bounds of the comparatively harmless little tricks of a tired mind, and calls for medical attention. Some antics of the Perhaps Your Mental Switch Is Open Do tunes “run” in your head until, half unconsciously, you hum, whistle, or sing them aloud in endless reiteration? mind are difficult to account for from any point of view. Many brought to the edge of a cliff, or of a roof, persons, when. Are you obsessed with a desire to step on every crack in the Do you worry after a letter is mailed for fear you have for- Have you ever put the match in your mouth and tried to strike your cigar or cigarette on the match-box? While reading do you continually have the feeling that you have skipped a page and must turn back to read the chapter all Perhaps you are haunted with a fear that you will blush at moments when no blushes are called for? If you do any of these things your mind at such times is taking a little holiday, or you may have a case of mental indigestion— for the mind is subject to minor ailments, just as is the body. Nothing to worry about in most cases, but the line between sanity and insanity is a narrow one; such side steps may mean “See a pin and pick it up,”’ is a most ancient and commendable bit of advice; but when the habit degenerates into a haunting fear that a pin unpicked will find its way into the soup, some- thing is wrong with the mental machinery. Most of us have these obsessions in small or greater degree. If " you are one of the many whose mental switches are left open at times, you will be interested in the discussion of these phenomena. utside an Some examples of what happens a to victims of mental indigestion tand- t - By Alfred J. Lotka ssion, = T JAVE you ever had that 1 that feeling that it had all happene before? Something that you rh were just doing you had done before, eat in just the same way, or something ane you were reading you had read before, 3 yy or something you heard you had heard ae before? Yet you could not say when fiv —in fact, it did not seem as if it fitted te anywhere into your ordinary life. ited Rather it seemed as if it must have happened to you in some previous a ta existence, in some earlier incarnation, cloth. long forgotten, of which you were just rmits now being mysteriously reminded. mead Why? Nobody Knows! work Well, your mind was just taking a wg little holiday. The feeling is very orts common. There is probably no one — who has not at some time experienced it. What does it mean? The wisest expert in psychology cannot tell you, though various guesses have been made. ost of One rather ingenious guess, which rable. perhaps is as good as any other, is based rcome ~ on the fact that the brain, like the ectric rest of the body, is symmetrical, and (0 use consists of a right half and a left half. npact The theory, then, plant is that ordinarily, ormer when we see an object proof or hear a word or a easily tune, the two halves | the of the brain act at o the the same instant. done. |. Once in a while, for rrent some mysterious sidewalk? ijust- reason, the two hem- vents ispheres are a little <a tet and out of time, and the a eee The one sees or hears just ished a little before the ot is «<n It is then that we get this of an strange feeling of hav- ower ing been there before. Ss no Why should the ct to mind take these ason- mysterious side- f the steps? Perhaps the swer mes ad- Clearer when we put : the much or little. same other way. Why ined should it not? Do ition. you expect to go leak- through life withouc ating | a toothache or a ans a headache, without 4 1 the cold in your head, without a_ bilious or of a body of wa- ter, feel a strong im- pulse to jump off into space or into the water—even though, in the latter case, they may not be able to swim. This feeling is some- times so keen that such persons are afraid to go near these places for fear they might give way to it. Are You Afraid of High Places? Sometimes it takes on a modified form: the impulse is to push another verson over the edge. ‘n either ca e the im- e x * \ ; % 4 i 4 , 4 ey - =
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pulse is usually little -more than an imaginary disturbance. It is rarely carried out. When it is, we are again dealing with something more than a trivial attack of mental indigestion. There is also something seriously. wrong with a person in whom the fear of high places is developed to such an absurd degree as in the case of a cer- tain young woman who absolutely refused to go up to the second floor of her house, because, she said, if she should fall from the first floor, it might not kill her, but from the second floor, that would.be a different matter! Another common af- fliction is the fear of for- - getting something im- portant. The attack usually comes on after a serious omission of some kind has actually been made. — Perhaps you have committed the blunder of mailing a let- ter unsigned, or without the proper enclosure, or with insuffi- cient postage, or improperly addressed, or have made yourself guilty of some other such sin unpardonable in a businesslike individual. After that you are haunted with a fear, whenever you mail a letter, that you may have made a similar blunder. Or perhaps you tear it open again, to be sure it was right. Cleanliness May Be Next to Insanity If you are a normal person this un- pleasant state of affairs soon corrects itself, and you regain your self-con- fidence. In weak-minded persons the condition may persist and even become quite grave. It may hinge on some trivial and foolish circumstance, as in the case of the young girl who, having broken a needle and been unable to find the pieces, became anxious lest someone should be injured by them. This feeling grew into a positive mania. She was constantly in fear of having left- broken needles in places where they might damage people. One day, having gone through her father’s vineyard, she was so disturbed at the thought of having perhaps dropped the point of a needle among the grapes, that she went back secretly and cut off all the grapes in the row that she had passed, and burnt them. -Another woman kept strict count of ail the pins and needles in her house, so that ‘‘if there should be one dropped in the soup, I shall know it.” ‘banquets and din- These fears, or phobias, as they are called, take on all sorts of phantastic forms. A rather common example is a highly exaggerated punctilious regard for cleanliness. Then the day be- comes a continuous performance of washing hands, brushing clothes, and so forth. At night, before retiring, the bed must be gone over with a clothes-brush. Nothing quite allays the fear of dirt or dust. Another person is afraid of saying improper things. She adopts a sign language, and never utters a word. At night she seals her lips with adhe- - sive tape, or tries to sleep with her tongue stretched out far and clenched between her teeth. Ancther is seized: with a terrible doubt as to his own existence. He goes to wake his sister in the middle of the | night to reassure himself: ‘‘I am talking to you, so then I exist, do I not?” Still another is irritated by the noise of people chewing their food at meals. He puts cotton in his ears, but soon this affords norelief. He avoids dropping He has “a tune running through his head,” and so completely is he under the control of his ob- session that he just has to sing his tune aloud in the middle of the night The woman who has a mania for thrusting all sorts of things into her flesh finds her counterpart in the one who has a deadly fear of “ pins in the sovo ners; he canna sit at table with children; and e is forced to eat j itude. Sat in Then there ig the of the man who unable to make a progress in his reading because he was afr: he had skipped a “a by mistake, so he had to start again at the top of the page. He kept do. ing this over and ove and could never get be. yond that one page, Haunted by the Fear of Blushing Another man is haunt. ed by the fear that he will blush at an awk ward moment. He re. practices to meet the situation. He uses paint and powder to his natural complesion, He pretends to be meading a newspaper, so as to hide his face. Or, to keep his thoughts oecu- pied, so that they wil not revert to the embarrassing subject, he goes on his way along: the street balancing a ruler on his shoulder. Or he creates an artificial complexion by ‘imbibing.’”’ One desperate individual demanded that the arteries of his neck be tied, so as to prevent the telltale flow of blood. to his face. Another threatened to put out his eyes, so as to be unconscious of the embarrass- ing gaze of the people around him. Even suicide has been committed to escape this dread of blushing! Phobias or fears are not the only sorts to all sorts of queer | < q j — — | — | P — i j é < ‘ — 2
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is neck telltale nother 3, SO as ArT ass- d him. tted to e only ‘motives that will make people act “ ”*» Some persons simply feel aque to do peculiar things for no particular reason. One man, ever since he was ten years old, has counted every word he has spoken, thought, read, or heard. He shows no signs of fatigue from his formidable men- tal activity. Another “‘queer”’ person feels that he must step into every mud-puddle on the sidewalk as he goes along. He must buy just three copies of the daily paper and smoke just three pipes. Not satisfied with his own peculiarities, he insists that his wife and children go through similar antics to conform to his spleen. We have all heard of “human. ostriches’’ who swallow all sorts of ut- terly indigestible things, the presence of which is easily disclosed by X-ray photography. Dr. Allan McLane Hamilton, in his “Recollections of an Alien- ist,” tells of a woman who had a mania for thrusting all sorts of articles into her flesh. They drew out of her ninety-four pieces of glass, thirty-four wood splinters, two tacks, four shoe-nails, and an assort- ment of pins and needles. Another one of his “queer customers” was a man known as “Gentleman Joe,’’ who caused a sensation by a series of prac- tical jokes which he worked on a num- ber of unsuspecting persons. Joe seemed to work simply for the fun of the thing, or perhaps for the notoriety that followed. He went to a number of stores and ordered a most varied and voluminous assortment of goods. These he ordered sent to the homes of prominent men, charged to their accounts. So, we are told; one fine morning East Twenty-third street was crowded with wagons and drays all eager to deliver a strange assortment | of goods at the home of Morgan Dix. There was a grand piano, several sew- ing-machines, groceries and wines, a baby carriage, agricultural machinery. of various kinds, a dentist’s drill, and other assorted articles of equal utility to the consignee. On another occa- sion “Gentleman Joe” sent a dear old maiden-lady a bass-drum. Clergymen found themselves suddenly and unex- pectedly the possessors of such compro- mising things as poker sets and other shockingly unchurchmanlike articles. Various disorders of the faculty of will are well known to the alienist. The Inability to resist the craving for drink is one of the commonest of these, with instances of which everybody is more or less familiar, though most of us probably do not realize to what lengths dipsomaniacs will go to satisfy their want. Dr. Mussey of Cincinnati re- ports the case of an inmate of an almshouse who, after trying various other expedients without success, finally secured his heart’s desire—a drink of rum—by laying his hand on the wood-chopping block and severing it with one blow of the ax. He ran around brandishing the b'eeding stump and crying for rum; of course he got what he wanted. It is a matter of taste which expedi- ent appears to us most horrible, the one followed by the man who chopped off his hand to get a drink, or that of another patient, who drank all the alcohol in a set of jars containing morbid specimens in a_ hospital museum. The Awkward Predicament of Sud- -den Loss of Memory A sudden loss of memory has placed many a man in an awkward predica- ment. The daily papers not infre- quently report cases of amnesia, a condition in which a man suddenly forgets all his past, his name, his address, everything. Sometimes only a certain portion of the memory is affected. In 1873 Barre, singing a role at the Opera Comique, was suddenly . seized in the middle of the perform- ance with a total loss of the musical This man walks along the street balancing a ruler on his shoulder. Is he practising for a memory. All prompting was in vain. He no longer understood what the actors were singing, neither could he utter a single note. He could speak and understand spoken words per- fectly, but music had be- come a meaningless noise to him. He later recovered his normal faculties, Apraxia—Loss of Control Over Certain Actions Most bizarre of all, per- haps, are the actions of a person in a state of apraxia, as it is called. Such a person may be in full possession of his mental faculties, but has lost the control over intends to do one thing, but in fact he does some- thing quite different. So, for example, he is given a cigar and a box of matches. Lie takes the box, opens it, inuerts the end of the cigar, and tries to close the box, as if to clip off the tip of the cigar. He realizes that this is wrong, so he tries again. This time he rubs the cigar, like a match, against the side of the box. Finally he of shoe-blacking and a brush, he starts .to brush his hair instead of his shoes. You may say, how do we know such a man is in pos- session of his senses? Partly because he recognizes and correctly names the various articles that he so strangely misuses. But partly also through the light shed on instances of this kind by a most extraordinary case observed some yearsago. Here the apraxia af- fected only the right side of the victim. As the man, like most of us, custom- arily employed by preference his right arm and hand, the peculiarity of his case for a long time remained undis- covered, and in fact his condition had been pronounced that of a hopeless imbecile. Then it was noticed that his actions, with the telephone for instance, were very peculiar. With the left hand he would correctly place the receiver tohisear. But the transmitter, which he held in his right hand, he would put first up to his eye, then to his fore- head; then he would try blowing into it. Finally it was discovered that if his right hand were held or bound tight, so that he was forced to use his left, he performed all required actions cor- rectly and sanely. It was thus shown conclusively that in this case, at any rate, apraxia is not so much a disorder of the mind, as of the mechanism by which the mind controls the ac- tions. certain of his actions. He. lights the cigar, but at both. vaudeville turn? ends. When given a-box Not at all, he is doing it because he is afraid. Afraid of what? Afraid he will blush ls Wife ‘in gol. he case 10 Wag _ % ion by ividual | | ‘
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Graf Waldersee had a chance to The Redondo rammed the Graf Waldersee off Long Beach, New York, recently. Of course, a hole was stove in the side of the Waldersee. To stop up the hole, a collision mat was low- ered, which the inrushing water pressed against the leak When the “Graf Waldersee” Rammed the “Redondo” in a Fog VERY ship is but a bubble of air floating on water. The skin of the bubble is either steel or wood. Even on the biggest ships not more than one half or three quarters of an inch of steel separates you from the water. Suppose that there is a collision in a fog, and that a hole is rammed through that thin plating. The water rushes in and fills a compartment or two.. If the bulkhead doors are closed the other compartments will keep the ship afloat. For all these precautions, no sea captain views a leak with indifference. The water may flow over the top of one compartment into another, which is what hap- pened when the Titanic rammed an iceberg and went down. To stop the leak the captain takes advantage of the inrushing water. He low- ers a collision mat or im- provises a stop-gap of some kind. Lowered over the side of the ship, the mat is forced by the inrushing water against the leak. After that the pumps are started, the compartment is cleared, and repairs are made from the inside. The boys on the transport familiarize themselves with these emergency measures when their ship was rammed recently by the Redondo off strikes the Hammering by F oot-Power OU drop the hammer, and jump up and down “y pain; instead of hitting the nail on the head it h d hit the nail of your finger. You can never be sure that the hammer you wield will land just where you want it to neither can the blacksmith. And so Sill Hamilton, of Alabama, has invented a_ self-wielding blacksmith’, hammer that always strikes in the same place. The hammer, which has a slight curve in its handle ‘is bolted to the top of a stand that is located at the distance of the hammer’s length from the center of the black. smith’s anvil. Thus, when the hammer is dropped, it wil] always land at the center of the anvil. How j is it raised and dropped? By a foot-pedal, which the blacksmith works. This foot-pedal is located at the end of an arm that jg hinged to a second arm extending up to the curved part of the handle. A spring from arm to arm adds force to the blow. In its normal position the hammer-head rests on the anvil and the foot-pedal is raised. The blacksmith steps on the pedal, thus lifting the hammer, while he adjusts his work. When it is ready for the blow, he takes his foot fromthe pedal and the hammer anvil. A ring at- tached to the top of the hammer stand holds the hammer in an upright position when ad- justed. You work this ham- mer,with your foot in- stead of with your hand —stepping on the pedal to raise the hammer and re- moving your foot to let it drop What Will You Have Today, Sir? > AM and eggs,”’ says he. ‘‘Chicken salad and a lime quencher,” says she, And the waitress writes it down. There is no chance of the waitress losing her order- book, for she wears it on her sleeve, or, to be more exact, on her leather cuff—held in place by a rubber band. The old-time “biscuit- shooter”? used to carry her order-book in a pocket, and great were her struggles unearth it when “ham and’ orders came too fast for mem- ory. But fashion has robbed the waitress of pockets. Her pocketless dress is re- sponsible for this trick, which has proved to be a good one. All the other waitresses in the restaurant with her have fol- lowed suit with excellent re- Long Beach, near New York, If you order ham and eggs from this waitress you will be sure sults. The book is as easy to in a fog. to get ham and eggs; she wears her order-book on her arm consult as a wrist watch. : beg J i 2 : | ‘ge — || to } i| a
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-may become exhausted at an in- | An Electric. Power-House for Your Pocket t it has been your experience, while ering for something by the light of your pocket flash-lamp, that the battery of your lamp became exhausted and the light went out. Such an experience stimulated a French inventor to devise the electric flash-lamp below. The case, of convenient pocket size, contains, not a battery, put a miniature electric generator consisting of a multipolar magnet that can be rotated around a fixed induction coil. The shaft of the wheel pearing the magnet is connected by a multiplying gear with a lever on the outside of the case. When the lever is pressed against the side of the case by arapid closing motion of the fingers, the pressure is transmitted _by the gear, and imparts a rapid rotary motion to the magnet wheel. The electric current generated is trans- mitted to the incandescent lamp at the end of the case, and causes the filament to give short, intermittent flashes of light as long as the lever is worked back and forth. A ratchet connec- tion with the gear of the magnet wheel disengages the lever when the pressure is released, and the lever returns to the original position, as shown in the picture, under the pressure of a spring. ; The frequency of the intermittent flashes depends upon the energy and speed with which the handle of the lever is worked. Its princi- pal advantage is that, unless the mechanism is out of order, the lamp is always available and does not depend upon a battery, which convenient time. Press the lever at short intervals, and you get a series of light-flashes A bank clerk sorts his checks on top of this desk; when he raises the top a bookkeeping machine appears Keeping Books by Machine FTER the style of the type- writer desk, there has been in- vented a bookkeeper’s desk. When the top is closed, the bank clerk can stand and sort his checks on it. This done he lifts the lid and sits down. There are two drawers and a shelf to the left of him, his loose-leaf ledger to the right of him, and a bookkeep- ing-machine in front of him He keeps his checks, tickets, and other items on the shelf, enters these in his ledger at the right, and does his adding and subtracting on the con- veniently placed machine. This Machine Saws through a Thick Propeller Hub ID you ever try your hand vi at sawing wood? Didn’t you find it a task altogether too strenuous for your taste? Now, if sawing through a few boards made you perspire and tired you, imagine how you would feel if you had to cut through a mass of iron or some other hard metal two or three feet thick. The accompanying picture will show you how this can be done neatly and efficiently and with- out exertion. The bulky object suspended by chains is an ocean liner’s huge propeller, weighing about twenty thousand pounds and cast of manganese bronze, which hasa tensile strength of seventy- five thousand pounds to the square inch. ‘The circular saw has cut its way through part of the hub, which has a diameter of twenty-eight inches. These saws must be made of the very best material to resist the tremendous wear of cutting through comparatively hard Tt cuts through iron three feet in diameter almost as rapidly as a hand-saw cuts through a plank metal. The body or disk of the saw is of high-carbon crucible steel, subjected to an oil treat- ment that greatly improves the temper of the metal. The teeth of the saw are of high-speed steel, and are also oil-treated. They are so hard that they are still good after weeks of cutting through iron or bronze. The teeth are not an integral part of the saw’s disk. They are set or dovetailed into notches or pockets cut into the rim of the disk. The lower end of each tooth—that is, the end nearest the center—is slightly wider than the outer end, or that nearest to the periphery. Each tooth is securely held in place by a wedge, which causes the tooth to hold more firmly the greater the force used in trying to pull it out of its seat. The saw makes between eight hun- dred and nine hundred revolu- tions a minute, and cuts through about one and one half inches of material every minute. ‘ie he | | — i y to
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4 Z T is said that in New York harbor the amount of cargo handled each year averages only 150 tons per foot of bulkhead or pier, while some European ports average 500 tons. It costs ordinary freighters from one to three thousand dollars a day to wait around for their turn to load and un- load—which, of course, is ultimately taken out of the consumer. More than that is taken out of the eonsumer. He pays for the two days a truck often has to wait in line at a pier to get a load. At times drivers unharness their horses and go home at night, returning in the morning to resume their long vigil. Vehicles of all - kinds come to the piers, get in one another’s way, often drive off with about half a load, because that is all they happen to be after, and in i general work on an exceedingly in- SSS This huge port development is planned to cover eleven hundred acres. At present : < | the eleven hundred acres are but a barren stretch of shallow water and rock Cut the Cost of Living by Producers and railroads are fairly efficient: to and away from them that is constantly efficient plan. Their charges are often half the total freightage, even though the article came half way across the continent. And the consumer pays the bills. The point is that, though America boasts the most modern and efficient railroad system in the world, and is forging rapidly to the head as a Jeader in ocean transport, it is still hobbling along with a docking system that belongs to the days of sailing-vessels and ox-carts. New York, for its part, realizes the situation. As one of the remedies, it proposes to build the huge terminal project shown above. The place will be one great hive of industry and a model for its efficient handling of in- coming and outgoing goods. The piers around the edge of the develop- ment will be sufficient to accommodate | ¢ « — — — i] — i} — — | it if | —
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ent: ntly »ssels s the es, it ninal will nda f in- The elop- date BAW NA WN The area will be the meeting-place for raiirc .ds from the west and north, the great WAGON AND TRUCK FERRIES™ ocean liners, freight vessels, car fersies. ¢xpr*ss companies, and city motor-trucks Cutting Terminal Congestion it’s the antiquated system of getting goods raising the price of everything we eat fifty 500-foot vessels; the ground area occupied by pier-sheds will be 1,900,000 square feet; by open storage on piers, 1,300,000 square feet; and by indus- trial buildings, 1,500,000 square feet. There will be a gravity yard for the routing of harbor-going cars to their proper ferry, and another—work- ing in the opposite direction—for handling inland-going cars from the ferries. Twenty-five thousand cars can be accommodated at one time in the great industrial area. The object of the place will be to get both cars and ships loaded and un- loaded as rapidly as possible, and to expedite the delivery of goods routed in or near the city. Huge warehouses will be so close to the edge of piers and bulkheads that ocean steamers can load and unload directly, the lower stories taking the incoming cargo, the upper ones providing the outgoing. Labor-saving, time-saving machinery will be everywhere. All vehicles will be routed to and from the place by a definite system. Vessels need not go away to be coaled. The system and machinery will be such that the largest vessel may be coaled in from two to three hours. A coal-pile of 680,000 tons on the pier itself will provide a reserve supply. Revolving locomotive-cranes running on a track of nineteen-foot gage will handle this. In addition, 8,000 car- loads of coal can be on storage tracks near by. Fuel-oil will also be avail- able, piped direct from works in New Jersey. There will be a ship-repair plant, a huge graving-dock (a dry-dock that doesn’t float), dry-docks, boiler- houses, and roundhouses. The whole development will cost $200,000,000. } * sent 7 €) 4 | | 2 a 17;
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_place, _ experiments in side launch- great. In an empty hulk _ Down the ways sidewise slipped the Lake Fugard. Her engines were installed and steam was up. She hit the water with a terrific splash, almost rolled over on her side, and then came back on an even keel She Was Launched with Steam Up VERYBODY is happy at a launch- ing except the shipbuilder. His heart is in his throat. When the band is playing he mops his brow and wonders if his creation will prove to be a duck or a stone. The launching of a ship is perhaps the most critical moment of her career. Some of the dangers that accom- pany the launching of a ship have _ been overcome by letting her slip down the ways, not stern first, in the traditional way, but sidewise. Side launching originated on the Great Lakes. It has several advantages over the old stern method. In the first place, the body of water into which - the ship plunges (a river or a basin) need not be very large; and, in the second when the entire broadside of the ship is exposed to the water more resistance is encountered, so that she does not travel very far under her acquired momentum. One of the most daring ing was recently made when the Lake Fugard, one of the last of the Emergency Fleet Corpora- tion’s ships, waslaunched at Buffalo, N.Y. The Lake Fu- gard slipped into the water not a mere hulk but a completed ship. Engines and boilers were installed and steam was up. Above all things, a ship must not betopheavy. As the shipbuilder expresses it, her ‘‘metacentric” height must not be too it is easy enough to shift gave HOARD rubber ball in 6.23 seconds. the Great Lakes ; weights. so that any errors that may have been made in building the hull, and that may cause topheaviness, are corrected. But in the case of the Lake Fugard the heavy engines and boilers were installed. Would she be topheavy when she tipped the water? When the Lake Fugard took a drop of twenty-three feet, hit the water with a mighty splash, and tipped over at the extraordinary angle of nearly 70 degrees, even the technically unin- formed spectators held their breath. Would she come back? She did—and that in seven seconds. Probably the rebounding water in the narrow slip aided her. The Lake Fugard’s sister ship was also launched with steam ‘up. She tipped over 73.8 degrees, and bounded back like a Side launching is nothing new on but when it was decided to launch the Lake Fugard at Buffalo, N. Y., with engines and boilers in- stalled and steam up, shipbuilders on the Great Lakes marveled The circular glass in the protecting hood revolves so fast that rain and sleet cannot take hold and the bridge officer looking through it is better able to navigate For a Dark and Stormy Night on the Ocean HEN the bridge officer in the picture above turns that switch, the circular glass window just above his hand will start to revolve at a very high rate of speed. What has that to do with naviga- tion? When it is a dark and stormy night on the ocean, and the rain falls thick and fast, the bridge officer is often so blinded by the rain that he is apt to put his ship in danger. Now, by looking through one of these revolving glasses, the danger is greatly lessened and the officer is more com- fortable. The high speed of its motion prevents rain, sleet, and snow from sticking fast. Besides, the glass window is mounted in a_ hood. that protects the up- per part of the officer’s body. Hardy ancient mariners will probably scorn this new helpful device, which was in- vented by M. de Nor- manville, a French- man; nevertheless, it has been installed on the Adriatic and on many other of the big ocean liners. . The English people are-now putting these revolving glasses on the wind shields of automobiles; thereby many a rainy - night accident will probably be avoided. Som |
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considerable trouble with the dead centers, that is the tail-stock centers, of the lathes. They either ran hot and necessitated a stop to loosen and oil the center, or, in many cases, the center burned off altogether. This was due, of course, not only to the speed at which the work is rotating, but also to the excessive friction created by the expansion of the work. This is especially a fact when turning work of large diameters, and, of course, correspondingly large centers such as crank shafts, large arbors, tubing, etc. From the earliest days this matter of the dead center has been a prolific source of annoyance and danger. Grinding an oil-groove in the center does not mitigate it, for the heat burns the oil up before it can reach the bearing part of the center, and an Fe some time we had been having -attempt.to give the lubricant ‘“‘body”’ by mixing it with red lead or graphite is unsatisfactory, for the heat quickly evaporates the oil, leaving the oil- groove filied with a hard, dry scale that stops the flow of oil altogether. It Prevents Good Work There is little to choose between the center running hot or burning off, for both cases are highly objectionable. Where the lathe must be stopped, and the dead center withdrawn during a cut, it is likely to cause the cut to vary when the lathe is started up again, and will either cause a shoulder on the work, or cause the cut to begin taper- ing, owing to the impossibility of adjusting the center exactly as it was before. On the other hand, should the operator continue to drive the lathe, the center may burn off, and the work © fly out of the lathe, which is dangerous, especially if the lathe is running at finishing or polishing speed. It seemed to us that anything that would permit the work to be done with greater ease, fewer stops, and in- creased safety would be a step in the - Tight direction, and with that idea we designed the safety center shown in Fig. 1. In this center it was not intended to produce a costly, full ball-bearing ap- Paratus, but a simple device that ¢ would automatically transfer any ex- cessive strain on the point of the center to some other part designed to receive it, thus obviating the possibility of the center becoming overheated or burning off. By reference to the figure it will be seen that the part of the center entering the tail-stock spindle—or the shank—is merely a socket, bronze bushed, and containing the straight- shanked center as shown. Means for thorough lubrication is provided by the oil-hole and the three longitudinal distributing grooves, as is plainly shown in the illustration. The straight center is merely a “running”’ fit, is hardened and ground all over, and is slightly “cupped” to seat on the hardened steel ball, as indicated. In use, the ball receives the end: thrust, while the function of the bronze bushing is merely to maintain alinement. Any tendency of the work to bind, through friction or any other cause, causes the straight center to revolve upon its ball seat, and within the bronze bushing, relieving the center itself of all undue strain and trans- ferring it to the ball bearing. The cup in the seat of the straight center must be shallow—just enough to hold the ball in place—in order that the surface contact between the work and the point of the center shall be _ greater than the surface contact upon the ball seat, so that the latter may freely revolve. Accurate Turning of Angles An idea from the tool-room.is shown in Fig. 2. It is of great use in turning tapers, bevels, form tools, and all angular work where a high degree of accuracy isrequired. It was originated by us for turning relieved circular form tools, some kinds of fly cutters, and for setting the compound rest of the lathe for grinding hobs. Of course relieved cutters, and the like, cannot well be ground after they are hardened, and the degree of accuracy obtained at the lathe is final. A good example would be a ten- or twelve-tooth circular cutter for pro- ducing the National Acme (29 de- Making the Machinist More Efficient A deviie for eliminating trouble with dead centers, together with other devices for increasing efficiency By J. B. Gray grees) or the United States Standard (60 degrees) thread. Such cutters are hardened, ground in bore and on radial faces, and put in service—further grinding is impracti- cable. In such work, tolerances at the lathe must be very small, es- pecially so on the angular sides, as these form the bearing surfaces of the screw, and a cutter in error here, would be entirely worthless. The Template Is Unzeliable' Such cutters should never be made to a template gage for several recog- nized reasons. First, the lathe would have to be adjusted and readjusted many times at a great expenditure of time—and time is money. Second, the greatest degree of accuracy that can be obtained in working to a tem- plate isobtained when the lathe com- pound rest is adjusted until the bevc) turned “‘shuts out light” when tried in the template. Since no two men possess the same degree of sight this method is, at best, hazardous, and may well be considered obsolete. The third reason is that a piece may be turned to really shut out light, when tried in the template, and yet be far from accurate, for a piece may be from one-fourth to one-half thou- sandth of an inch in error, and still ‘shut out the light. This is worse in turning bevels and tapers where an error of one thou- sandth of an inch, or more, may go unobserved. The smallest amount of error men- tioned here could not be tolerated in modern tool-work, while an error of one thousandth of an inch would spoil almost any kind of precise work. Accuracy, if it is to be obtained, must tend toward the elimination of the human factor as far as possible, and this consideration formed the basis upon which we originated the method shown in Fig. 2 for the accurate turn- ing of angles—accurate within .0001 inch. Any ordinary lathe operator can produce such work, and duplicate pieces can be depended upon to be really duplicates. As shown, the method is merely the sine-bar principle, simplified for use on the lathe by the average lathe hand. | | | y/ S So | ihe idge zate if my aq that dow t to ; 2 of 2) riga- and | the ship e of nger and ‘om- if from ides, 100d. | up- cer’s sient |pful Nor- nch- by it | on on i ople hese on 3 of reby ight | ably if it
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Only one simple calculation is re- quired, and this one can almost be performed mentally by a boy. The only apparatus required is a lining-bar—that is, a straight, round, centered piece of stock. Now, in starting to turn an accurate bevel, the first thing to do is to bring the lathe centers in perfect alinement, and this is accomplished by placing the lining-bar on the centers, and, with an indicator set in the tool-post, moving the carriage by hand from one end of the bar tothe other. Move the tail- stock to or from you, until the indi- eator hand shows practically no move- ment, whereupon the centers will be in absolute alinement. Referring to Fig. 2, it is evident that the success of the method is de- pendent upon two factors, i. e., the truth of the lining-bar formed by the longitudinal movement of the com- pound slide, and the center-line through the studs, as shown. Of course, when precision work is to ‘be done, the fundamental require- ment is to have accurate tools. It will, therefore, be very advisable to test such parts of the lathe as will be used to obtain the desired accuracy. Testing the Adjustments The cross-feed screw must be tested to make sure that it forms an angle of 90 degrees with the longitudinal center- line of the lathe. A quick and ac- curate way to determine this is to place the test-bar on the centers and OIL HOLE | FIG! The safety center that was designed for permitting the work to be easily done clamp the stock of a reliable square to it, laterally, setting the square level with a common bench level. Then set an indicator in the tool-post, and run along the square-blade; if the lathe ‘is not true, the only remedy is to use another lathe. However, any good make of lathe will probably pass this test satisfactorily. The next thing is to locate the center-line of the buttons at exactly 90 degrees with the longitudinal move- ment of the compound rest. Since this lathe is to be tested, adjusted, and reserved for high-grade precision work exclusively, we can well afford to take the time and trouble to properly prepare it for the work it is to do, always remembering that any error in the machine will inevitably be re- produced, and almost always multi- plied, in the product. Remember nothing pays better dividends to either firm or mechanic than well cared for tools, machinery and equip- ment. The compound rest should now be removed from the lathe, set vertically on the milling-machine table, and clamped to an angle-plate—or knee- plate, as some call it. Setting Up the Lathe An indicator should be clamped on the milling arbor—between two collars is good—and by raising and lowering the table with the vertical screw, and permitting the slide of the compound rest to remain in contact with the indicator, the slide can easily be adjusted perfectly true vertically. The two studs (1 and 2) should now be turned, hardened, and ground to -600 in. After the first hole, for stud 2, let us say, is bored for a press fit, set this stud, using a C clamp, if desired, to force it home, and then run the table along until the job is out of the way. Place the vise on the table and the chuck in the milling spindle, and turn down a piece of, 34-in. stock to .600 in.; this—the stud (No. 2) that is already set, and the turned piece in the chuck—gives the two essential measur- ing points to enable us to locate the distance from center to center which should be exactly five inches. Now adjust the table until the distance over the stud and the piece in the chuck measures just 5.600 in., measured with a pair of ordinary 5-in. to 6-in. ‘‘mikes.”’ Remove the piece from the chuck. Put a drill in the chuck—one about a sixteenth of an inch smaller than the finished hole is to be—and drill the hole to depth. Remove the drill, put a small, forged boring-bar in its place, and finish the hole to size, same as the hole for the No. 2 stud, which is al- ready set. Be very careful not to disturb the position of the table, lengthwise, while feeding the work to the drill with the cross-feed ¢trew. Stud No. 1 should now be pressed in place and the compound rest replaced on the lathe. As shown in the elevation, the studs should be approximately ‘‘center high”; they may be a shade higher, but no. lower. In use, the clamping nuts of the compound rest should be loosened and the rest turned approximately to the angle desired, being set to the gradua- tions on the base. The compound is then moved inward with the cross-feed screw, until one of the studs just touches the lining-bar, as shown. Now, if we are to turn a blank—for a double angle milling cutter, for in- stance, as shown in the drawing— having an included angle of 60 degrees, we remember that if. the compound rest is set parallel with the travel of the cross-feed screw, its angularity with the center-line of the lathe will be 90 degrees. This basic angle of 90 degrees is a constant, and whatever angle we are to turn, calculated from the center-line, must be subtracted from 90 degrees to obtain the actual setting of the com. pound rest. It is true, in the present example, - that the cutter for which we ~~. setting the compound rest is 60 de- grees included angle, and it is true, also, that the drawing gives the angle of each face, from a line cor. responding to the center-line of the lathe, in order to facilitate the setting of the compound rest; and since this angle, is given as 60 degrees, we sub. | \ 4 \ | Va ING BAR bX a 2 Ss. gv? STUD ELEVATION NOTE SIN. 500 X5'=2500" FIG.2. This idea is of great use in turning tapers, bevels, form tools, and all angular work tract 60 from 90 and get 30 degrees as the angle to which the compound should be set. Having set the compound rest roughly to 30 degrees, with one stud resting against the lining-bar, we refer to any good hand-book and find the table of ‘‘sines and cosines.’’ As our angle is 30 degrees, no minutes, we find the number opposite 30 degrees. and get .5000-in.—exactly one half inch— this, however, is the sine of an angle of 30 degrees, calculated to a circle having a radius of one inch. Making the One Calculation Now here is where the one simple calculation is required. Our buttons or studs are five inches center to center, and whatever number is given f in the table is simply multiplied by 5 in order to obtain the dimension a. In this case we get .5x5=2.5 or exactly two and one-half inches, accurate to the ten thousandth of an inch. . With an inside micrometer, ar a standard ‘‘size block’’ of this dimen- sion, the compound rest is adjusted one ~ way or the other, united, with one stud bearing against the lining-bar. The other is just two and one half inches from the lining-bar when the com- pound rest is clamped and we ire ready for accurate turning. Should our drawing give only the included angle, we know that one half of this is the angle with center-line, and by dividing by 3, we obtain the angle at which the compound rest must be set—in the present case we would have 60 +2=30 degrees—the same result as before. And the foregoing, of course, ap- plies to any angle that is to be turned by means of the compound rest. | 3 GROOVES. EQUALLY SPACED aj
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Members of W J R. C Unit No 13 of New Haven, practicing on their indoor range. This range was built in a church cellar. You, too, can have a range like this T’S no easy job these days to find a place where you could use a rifle—if you have one. But what is hard for you to do by yourself, becomes easy when you get half a dozen other boys interested in the same thing. The range shown here was built in the cellar of a church! It shows what organized effort will do. If you and a half dozen of your friends want to own rifles and want a place where you can learn to be expert in the handling of them, the Winchester Junior Rifle Corps can do for you what it has done for thousands of other boys throughout the United States Start a W. J. R. C. Unit with your friends The Winchester Junior Rifle Corps will help you from start to finish in mgging up an indoor or outdoor range. The W. J. R. C. gives you all the instruction necessary to become a real expert in the use of a mfle. It provides for officers, supervisors, and adult instructors to make your shooting safe. It also pro- vides a complete program of activities throughout the year It costs you nothing to join the W.J.R.C. There are no dues and no military obligations. The W. J.R.C. was organized solely to en- courage better marksmanship and better sportsmanship among boys and girls of America. It is in- tended to develop the qualities of fair play and manliness which are essential to success in after life. Any boy or gir] not over 18 who is in good standing in his or her com- munity 1s eligible. Membership in the W J.R.C. covers the entire United States. There 1s hardly a town now that has not at least a small Unit of the big national organization, where boys are learning to become expert riflemen and are competing for the famous Winchester Marksman, Sharpshooter and Expert Rifle- Scout Troop 23. man Medals. You, too, can earn these trophies of marksmanship if you join the W.J.R.C and start shooting now. You can form a five man team in your Unit and be matched against other Units. Get together with half a dozen ot your friends, join the Winchester Junior Rifle Corps and organize a regular Unit which will be officially recognized by National Headquarters. Any boy who gets a Umt started receives a Special Service Pin. Get the official plan and rule book Write today for the Winchester Junior Rifle Corps “Plan for organizing a W.J.R.C. Unit,” and for the official rule book ‘‘How to Handle a Rifle Safely ” This booklet tells you all about the W J.R.C and describes in detail the fine points of shooting—align- ment of sights, the three correct positions, rules for gun safety, the care of rifles, and the proper rifle for you to use. If you are a boy scout give your name in full, the troop you belong to and the name of the scout master If you are not a boy scout, state what or- ganization, if any, vou belong to, giving the name and address of the official in charge. National Headquarters Winchester Junior Rifle Corps, Div. 1120 275 Winchester Ave., New Haven, Conn., U. S. A. Standard types of .22 caliber Winchester Rifles, popular with members of the Winchester Junior Rifle Corps WINCHESTER Take-down .22 caliber single shot rifle. A low-priced, light weight gun made in two sizes. WINCHESTER JUNIOR RIFLE CORPS . National Headquarters, 275 Winchester Avenue, New Haven, Conn., U.S.A. WINCHESTER MODEL 90 Take-down Repeating .22 caliber rifle, 24-inch octagon barrel. The standard target rifle for over 25 years. Unit No. 13 in @ corner of its club. room adjoining the range. Unit No, 13 was made up of Boy Winchester Junior Rifle Corps Nat'l Headquarters, 275 Winchester Ave., New Haven, Conn., U.S. A., Division 1120 Gentlemen: Please register my name as a member of the Winchester Junior Rifle Corps, and send me a membership button and cer- tificate of membership. Also tell me how to organize a local Unit of the W. J. R.C. Very truly yours, NOM Street Address COP : TS % ‘ . ig 4 im 4 1 i q | | | | im fi i 7 im | if f | | i| ii | if K 4 i
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Mr. §&mith hada horse~ Mr. Brown wanted to buy the horse, but he didn’t know much about horses. Mr. Smith said if he didn’t like the horse, he would give back Brown’s money. But Mr. Brown figured that if the horse were right, Smith would let him try it out first, before he paid Sor it. So he didn’t buy the horse, although he needed it badly. E are not like Mr. Smith and his horse. We'll let you prove to yourself before you buy it that the 1900 Cataract Washer saves time, money, work and clothes. The 1900 dealer in your town will deliver a 1900 right to your home. After you have tried it out, you may start paying for it on terms to suit your convenience. If you are not satisfied, you are obligated in no way. Special eating is the figure 8 movement that makes the 1900 Washer the perfect washing machine. By means of this magic movement, the hot sudsy water is forced through the clothes in a figure 8 movement, and four times as often as in the ordinary washer. There is nothing complicated about the 1900. And it costs less than 2c an hour to operate. In 8 to 10 minutes, out come your clothes snow-white and clean. The swinging reversible wringer can be moved from washer to rinse water to blue water to clothes basket. There are no parts to rub against the clothes and cause wear and tear. No heavy cylinders to lift out and clean. IQOO CATARACT. WASHER 1900 Washer Co., Binghamton, N. Y. Canadian Factory and Office Canadian 1900 Washer Co., 357 Yonge St. Toronto, Can. Fill out and return the attached coupcn today. We will send you details and interesting in‘orma- tion concerning all our washing machines. We have them in muny styles and prices—both electric and hand power. Even the wringer works electrically Comes in 8 and 12 sheet sizes No worry, no bother, no fuss BINGHAMTON, N. Y. , Name 1900 WASHER COMPANY Please send me detailed information and the name of the nearest 1900 dealer. The water swirls No parts in the tub, gr ge Address. or heavy cylinders movement, and City-and State Preserving the Shape of Stored Tires ~ are very few public or i private garages that have not at least one tire not in use. The usual method of storing these spares is to hang them on large nails or hooks, This may do for a day or two, but if left for any length of time the tire will assume an irregular shape and a weak spot will develop where the nail has been when the tire is put into use. The illustration shows a type of hanger that may be made wide enough to accommodate a pair of tires, or even more, and will keep them in their original shape. It is made of a few boards and mounted on brackets con.’ structed of 3-in. strips of wood. The sides are curved to fit the inside of the tire and short pieces of board are HANGER TO BE CUT OUT BY THE INSIDE RADIUS OF THE TIRE Tires simply can’t get out of shape if stored on this rack nailed across their upper edges. The tire is thus supported on about a third of its circumference and so held in shape.—CHARLES R. FISHER. Obtaining Longer Life from Grass Rugs GRASS-CLOTH rug that had seen a year of service in a living- room was put in fairly good shape again and made to last two years longer by painting it. The rug was spread upon a flat sur- - face and painted with a heavy coat of house paint. The original colors were solid, with a different color at each end for the border. This same | color scheme was carried out when being painted, and on completion, at a casual glance, the rug appeared to be new. It stood washing well, after being painted, and since it was seldom rolled or folded, the surface cracked very little. Old rugs of any material may be made into good mats for the stoop or porch in the same way. If the rug is given two coats, one rather thin, followed by a heavier one after a few minutes, the surface will wear amaz- ingly well—DAL® VAN HORN. 3 i = 2 4 \ Wa ‘ OM i \N WN hy SS ¢ : 4 Ay * 4
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Make Your Ford a Closed Car Everyone wants closed car comfort provided it ‘can be had at a fair cost. In the UsTUS Limousette you get Limousine comfort with a Ford touring car or roadster at an exceedingly low price. The practicability of it is borne out by the fact that it can be used in con- nection with your standard Ford body and top without making alterations. The UsTuS Limousette can be transformed instantly from a cozy, closed winter car to an open machine for summer. . The Roller Windows respond at a light touch. Even a child can operate them with ease. The USTUS Limousette was designed so perfectly that it fits the body of a Ford car snugly. Only one unit is apparent because of its accurate design. The construction is sturdy yet light—it weighs only 40 pounds. It provides clear vision—front and sides—is free from rattles and vibration. and can be equipped to your car in an hour. This practical utility is now furnishing convenient protection to thousands Features of USTUS Limousette of Ford owners. Every week sees ~dditional hundreds enjoying its comfort and convenience. The UsTUS Dealer in your town will be glad to demonstrate to you the advantages of the USTUS Limousette. Distributor. for further information. Better call or write promptly to assure quick delivery. Seventy-five thousand See him now or write to your nearest Limousettes were sold during the first 120 days. DAFOE-EUSTICE COMPANY, INC., Manufacturers 1193 W. Jefferson Ave. Chicago Offices: 35 S. Dearborn Peter N. Jans, ATLANTA, GEORGIA Hammond-Elliott Co. 23 Peachtree Arcade BALTIMORE, MD. Backus Motor Co. BLOOMINGTON, ILL. Dayton Keith. CAMBRIDGE, MASS. Springfield Com. Body Co. 80 Charles River Rd. CHICAGO, ILLINOIS Rue Motor Co. 2443 S. Michigan Ave. CLEVELAND, OHIO Ohio Auto Equip. Co. Marion Bldg. DALLAS. TEXAS Morris Brothers DES MOINES, IOWA Herring Motor Co. DETROIT, MICH. J. G. Hays Sales Co. 1162 Penobscot Bldg. SAN FRANCISCO, CAL. . V. Carter Motor Co. 724 Van Ness Ave. Distributors EL PASO, TEXAS Tri-State Acc’s Corp. FARGO, N. DAKOTA Harrison Dist’g Co. FORT WORTH, TEX. Hubb Diggs Company HOUSTON, TEXAS Robertson & Pearson Cor. N. Main & Wood INDIANAPOLIS, IND. Indiana Tractor Co. LITTLE ROCK, ARK. Crow- Burlingame MILWAUKEE, WIS. Wis. Body & Sales Co. 418 Cedar St. MINNEAPOLIS, MINN. McAfee Specialty Co. 914 Mary Place MONTREAL, QUE. Northern Electric Co. NEW ORLEANS, LA. Oster Brothers 1418 Frenchman St. ‘LOS ANGELES, CAL. Shuger Mfg. Co. 1002 S. Los Angeles St. Provides closed car comfort in weather. Is combined with standard Ford body and top without alterations. Eliminates inconveniences of awkward side curtains. Instantly converted into open or closed car. Gives clear vision from front or sides., Detroit, Mich. New York Offices: 253 Broadway Arthur Sadow, Mér. CHY, Ni Geo. W. Copp Co. 236 W. 54th Street OKLAHOMA CITY Smith & Yancey 116 W. Second PITTSBURG, PA. Ccon-McGraw Sales Co. Bessemer, Blde. RICHMOND, VA. Universal Motor Co, 1012 W. Broad St. SAN ANTONIO, TEX. Waller Imp’t Co. SPRINGFIELD, ILL. Jennings Auto ‘Sales Co. SPRINGFIELD, MASS. Spg’d Com. Body Co. ST. LOUIS, MO. Walsh Motor Car Co. 4919 Delmar Ave. SALT LAKE CITY Western Rubber Sales Co., 134 E. Broadway DETROIT Campbell-Ewald Co. Marquette Bldg. FOR FORDS Pat. Appd. For The Priceisonly $46 for Touring Car, $30 for Roadster. F.O.B. Detroit The Datoe-Eustice Co., Inc., also manufactures the line of USTUS guaranteed protective canvas covers and USTUS automotive specialties of canvas and imitation leather. Send for catalog today We | i } | | | | : ‘ | ia — } SS { | | | | | it | | i] if im aa wat ‘ ij | } | | | f | | | | [ | |
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Stopping the Airplane Propeller from Drinking Too Much URING the war one of the great- est troubles experienced with air- plane propellers was the warping and twisting of the blades near the tips, and a large percentage of the propellers A carpenter shaping splices in a wing-beam flange of I-beam received at the front were rejected on this account. In order to determine the causes and to develop methods of preventing this trouble, a number of experimental propellers were manufactured for the War and Navy Departments by the Forest Products Laboratory of the U. S. Forest Service, at Madison, Wisconsin. The propellers were made of Central American and African mahogany, the wood being carefully selected stock, uniform in density and moisture con- tent. They were stored under uni- form atmospheric conditions for thirty days between the roughing out and final carving operations. After the standard finish, consisting of five coats of spar varnish, had been applied, they were again stored under the same conditions for observation as to warp- ing and twisting. Humidity Is the Bugbear These propellers were made up and handled much more carefully than the commercial product, and every pos- sible effort made to produce. perfect results. After exposure to a very damp or humid atmosphere for three or four months, it was found that every propeller had warped or twisted, or other- wise changed shape, to an ' extent that made them unac- ceptable for use. They had all absorbed about five per cent of moisture through the five coats of spar varnish, and this moisture caused trouble. By Fred Gilman Jopp The treatment to which these pro- pellers were subjected, namely, being manufactured under relatively dry conditions and later exposed to moist atmosphere, is very similar to that which is normally received hy pro- pellers made in the United States and shipped to France. Frequently pro- pellers : re made in a moist climate and shipped to a drier one, and trouble from change of shape due to drying out, and consequent warping of the wood, is almost sure to result. There are only two ways in which trouble from change of shape due to atmospheric conditions may be ob- viated—either make the propeller im- mune from changes in humidity, or . keep it under the same atmospheric conditions all its life. The experi- Showing the character of the splice used on the flange of an I-beam The strut is tested asa beam. It is supported by a knife-edge at each end of the machine The strut S is supported on knife-edges. The load is applied by a handscrew, H, and is measured by a dynamometer D. The screw is turned until the pointer ceases to move; the load then recorded is the maximum load of the strut ments just outlined show tha possible, even under ideal ma ing conditions, -to produce t it is im. nufactur. Propellers Three-piece I-beam showing blocks in: place and a part of the beam paneled out that, if preventive measures are not taken, will not warp or twist with changes in moisture. These changes may be prevented by applying a moisture-proof coating, At present, the aluminum leaf coating, developed by the Forest Products Laboretory, is the only practical moisture-proof coating that has been ‘successfully applied to propellers. It — is not possible to keep propellers under — absolutely uniform atmospheric condi- tions during manufacture and service, | but these conditions can be approached by making up the propellers at the — moisture coutent which they will nor mally reach in service. Propellers made up in this way and coated with aluminum leaf, have the best possible chance to give high efficiency and long service. Testing the Propeller’s Strength The wood of which the propeller is made is always tested for strength. In doing this the machine shown in the diagramis used. The strut is put under pressure and the load increased gra¢- ually till the maximum is reached— that is, until the load ceases to increase deflection. Sitka spruce and Douglas fir airplane struts of various patterns have shown that if stopped at this point the test does not injure the strut. The sketch illustrates a simple machine by whieh struts may be tested in this way at the rate of one hut dred or more an hour. After the experimental beams have been constru in the carpenter shop Repeated experiments on | = m . | |
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in place led out are not st. with nted by oating. coating, roducts ractical as been ers. It under condi- service, roached at the vill nor- opellers ed with possible ind long ath peller is gth. In 1 in the it under grad- ached— increase | rents on | airplane e shown is point jure the justrates y whieh this ne ental structed shop The Standard Spark Plug of the World Are You Always Careful to Get Them? Have you ever considered how many of the universally conceded fine automobiles have AC Spark Plugs for standard equipment ? For the sake of illustration let us cite a few of the more costly cars: Packard, Locomobile, Pierce-Arrow, Cadillac, Marmon, Peerless, Crane- Simplex, National—all AC-equipped. The list below carries the complete roster of AC users. An examination of it will be even more convincing. Why is it, do you think, that so many automotive manufacturers have united in the adoption of one make of spark plug? Isn’t it because they have found AC Spark Plugs to be consistently higher in quality, better adapted to their cars, trucks and tractors? This being true, it would seem logical that the motorist who desires the utmost in performance from his car should profit by the experience of these manufacturers and insist upon AC’s whenever spark plugs are needed. There is a specially designed AC Spark Plug for every make and style of engine. Always insist that your dealer give you AC’s when you ask for them. Champion Ignition Company, FLINT, <Achigan These manufacturers use AC Spark Plugs for factory equipment Acason Trucks _J.1. Case T. M. Co. Frontmobile Kissel Kar Moreland Trucks Pilot Stearns Tractors ped secpeme Chalmers F-W-b ‘Trucks Kleiber Trucks Napoleon Trucks Pioneer Tractors Sterling Engines ractors umely Chandler pang ES a Klemm Trucks Nash Premier Sterling Motors Ahrens Fox Fire Chevrolet Glide Knox Tractors National Ranger Trucks Sterling Trucks Trucks Chicago Trucks G. B. S. Motors Koehler Trucks Nelson Red Wing Thorobred Stewart Trucks American-La France Clark Tractors G. M. C. 'vrucks K-Z Trucks Nelson Tractors Motors Straubel Engines American Trucks Cleveland Gramm -Berastein La Crosse Tractors Nelson & Le Moon Reo Sullivan Trucks Anderson Cole Trucks Lalley-Light rucks Re Vere uper Trucks d rson Commerce Trucks Gray Dort Liberty Netco Trucks Riker Trucks Swartz Lighting Appleton Tractors Commonwealth Hackett Liberty Aircraft Noble Trucks Roberts Motors Plants Atco Trucks Conestoga Trucks Hall Trucks Motors lorthway Robinson Fire S-S-E-Co. Auburn Continental Motors Hahn Trucks Locomobile akland rucks Tiffen Trucks Avery Tractors Crane-Simplex Harvey Trucks accar Trucks Old Reliable Rock Falls Titan Trucks Bates Steel Mule Daniels Hatfield iboh Trucks Rowe Trucks fower Trucks Tractors Davis Haynes armon Oldsmobile Ruten ber Motors Trego Motors Beck-HawkeyeTrucks Deere Tractors Herschell-Spillman = Master Trucks Owens Light & Samson Trattors Universal Trucks Bessemer Trucks Delco-Light ° Hispano-Suiza axim Fire Power Plants Sandow Trucks United Trucks rucks Denby Trucks, (Canada) Holt Tractors Trucks Packard Sanford Trucks Van Blerck Braddon Diamond T Trucks Howell Tractors Maytag . Paige axon Motors Briggs & Stratton Diehl Trucks udson McLaughlin (Canada) Pan Scripps-Booth Veerac Motors otor Wheel Dodge Brothers Hupmobile Menominee Pan-American Scripps Motors Vim Trucks (Formerly Smith) rt Hurlburt Trucks Trucks Parker Trucks Seagrave Fire Ward La France Brockway Trucks Duesenberg Motors Independent Trucks eteor Paterson ae Trucks Buffalo Motors Eagle Tractors Jordan idland Trucks Patriot Trucks Seneca estcott Bugatti Elmira Jumbo Trucks idwest Engines Peerless ignal Trucks White Buick Essex Kalamazoo Trucks inneapolis Perfect Power inger Whitney Tractors Bullock Creeping- Fairmont Railway Kent Concrete Motors Sprayers Standard ‘*8”" Wilcox Trux ~ae Tractors ors : Mixers Mitchell Phianna tandard Trucks Wisconsin Motors Cadillac Federal Trucks Keystone Trucks Moline-Knight Pierce-Arrow Stearns-Knight olverine Tractors U. S. Pat. No. 1,135,727, April 13, 1915, U. S. Pat. No. 1,216,139, February 13, 1917. Other Patents Pending 93 : 2.3 | be | | i) il” i | | iii { | 4 | i iim iz . | Jif i = - i | | i
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This operation consists of symmet- tically routing out on a shaper the space between high stress points the Forest Products Laboratory they are delivered by truck to one of the testing laboratories for a final strength test. One of these beams is show.. undergoing test. The load is applied at four points through the lever system which is attached to the cross-head of the testing machine. The two screws are turned by means of gearing, thus drawing down the cross- chead through which they are threaded. When a beam breaks it sometimes shatters in a number of pieces and is very apt to fly entirely out of the testing machine. A broken beam is shown in the foreground. This particular machine was bor- rowed from the Kansas State Agri- cultural College for the war emergency, it being impossible to purchase a suffi- cient number of machines from the manufacturers. The results of many tests indicate that the three-piece I- beam is, under ordinary circumstances, to all intents and purposes as strong ‘as, or even superior to, the solid I-beam shaped out of one piece. Showing how the flanges and web in a three-piece I-beam are assembled | a sudden, two glittering _ darkness. Somewhere behind them ip? cylinder | ire penetration and absol 1t accuracy. Drawn tempered piano-wire springs throughout make the Iver — today or ten years from today. x greatest are made Of Vanadium steel. AK 4 i | SF
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Barbers and Improvements Barbers as a class have always been quick to take advantage of all improvements. They were early users of open plumbing, hot- | water heaters, electricity for facial massage, and compressed air for | speedily drying shampooed hair. Ard yet every barber today still shaves with one type of razor— ii the Genco type of Razor. Professionals know. Two hundred i thousand barbers realize that for one good shave, any blade . must be stropped. Anybody can strop a GENCO Razor : | The Genco is built to strop. It has a broad back; its blade is concave | ground; it is ground with a slight bevel immediately behind the edge. These i three features cause the blade to meet the strop at precisely the correct angle. if Its business-like shaving edge can be renewed with a few easy strokes. if Barbers buy Genco Razors, because every one is made of specially wrought if steel that retakes quickly a perfect shaving edge. Drop in on your dealer and ask to see a Genco Razor. Every one is sold with our guarantee, “GENco Razors must make good or we will.” If your \ dealer hasn’t Genco Razors, we will supply you. \ \ GENEVA CUTLERY CORPORATION ia 47 Gates Avenue Geneva, N. Y. | Largest Exclusive Manufacturers of High-Grade Razors in the World > | j i \ \ \ \ iL \ lx tifically designey to strop—a_ blade made with a broad. firm back, hollow lige to give backbone to the edge? Genco Razors can be stropped by you Bs nigle to assure a perfect shaving edge. > Reg. U. S. Pat. Off. f
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| ~TNOBTRUSIVE,. compact and impassible, the Yale Cylinder Night Latch stands doors. It opens closely to the command of its individual key. Yale Cylinder night Latches in millions are doing steadfast When you see a ni ght. latch J] ) watchful guard over your | world-wide duty on doors that must be secure. On your front and rear doors —on doors leading to cellars, on closets,on garages, on out- houses, on office doors—those are doors that will be locked when a Yale Cylinder Night Latch takes up its watchman task. Go to your Hardware dealer. He wilh show you the Yale Cylinder Night Latch bearing the same trade~ mark that appears on Yale Pad- and Butiders’ The Yale & Towne Mfg. Co. 9 East 40th Street New York City _ Chicago Office: 77 East Lake Street Canadian Yale & Towne, Ltd. St. Catherine, Ont. Chicago to visit our Exhibit Rooms Broaching Keyways in a New Way ERE there is no key-seater available and there are a num- ber of keyways to be cut to a uniform size, the following method will prove N | Tan Russia A substitute for the key-seater which per- mits keyways to be cut a uniform size worthy of the necessary preparation. The illustration shows a plug A. which can be of steel or cast-iron, slotted the width of the required key- way and having the standard taper. The broach B of tool steel, hardened and drawn to the required size, is guided through the slot by the pilot below the cutting edge. Strips of tin are to be used behind the broach after every cut until the necessary depth is obtained. In working on brass do not have too much lip on the broach. Use plenty of oil in working on steel and cast iron.—JACcK E. HOMEWOOD. An Artist’s Combination Easel and Work-Table N easel that can quickly be converted into an inclined table of adjustable height is shown in the accompanying sketch. It can be con- structed of odds and ends and will be ‘found to give good results whether the artist wishes to work at a paint- This contrivance can be used either as an easel or as a work-table ing held in a vertical position or at a piece of work which needs to be laid horizontally or at a slight angle. First put together the legs or in- verted V which comprise the founda- tion. This can readily be made of 3-in. furring. The legs should be about 30-in. apart and about 5-ft. high. Four braces B, C, D, E serve to bind the legs together and act as supports for the adjusting leg and the N Army shoes Herman's” ® | Sold in 8,000 retail stores. Munson Last Calfskin signifies top-quality. It is tw the shoe name the American | soldier knows best. And when American men in private life buy the Army type of footwear —for its perfect | orthopedic construction, genu- ine comfort and long service— tt they buy more Herman’s U.S. Army Shoes than any other | kind. Modern science shoe- % building finds no fuller expres- | sion than in this wonderful Herman line. Active occupa- tions and outdoor life have no *% more valuable allies than these | shapely, finely constructed, anatomically correct Herman Shoes. If you . are not near one, we will fit you correctly and quickly through our MAIL ORDER DEP'’T at Boston JOS. M. HERMAN SHOE CO. 802 Albany Building BOSTON. MASS. Could You Handle $100 a Day? Repair—Rebuild—Retread Tires the Vanderpool Way Profits 100% or moré Small invest- ment. Work easy to learn. We send you. FREE TIRE REPAIRING MANUAL. Business pours in. If others have been successful, so can you be. We are the pioneers in the manufacture of vulcanizers that guar- antee absolute PERFECT work. Don’t delay. Write today for FREE TIRE REPAIRING MANUAL and full particulars. In answering address Dept. R-18, WM. VANDERPOOL CO., Springfield, 0. Lh youre right— Y y/ | WL, “KK =. | 4 | (| a | | | | | ~Y ALE- Locks and Hardware. NuT. p-—I
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ov magnet rings your doorbell when you push the button= The Storage Battery When you buy a Columbia Storage Battery, you buy more than just “fa battery”—you buy power and endurance—you get def- inite power for a definite time..... Step into some Columbia place—they’re all round you—learn how your pocketbook is safe- guarded by the Columbia Guarantee and the famous Pyramid Seal. Dry and Storage Batteries HEN fed electricity from a dynamo, the magnet of the crane lifts a ton of iron—like the familiar little horseshoe mag- net picks up needles. With electricity from the fiery little Colum- bia Dry Battery, there on your cellar shelf, a little magnet rings your doorbell when you push the button. ; Millions of doorbells— millions of Colum- bias on the job. Columbias are busy wherever bells are rung or buzzers buzzed; autos, motorboats, tractors, trucks, or farm engines ignited; lanterns lit; or telephones livened up. Fahnestock Spring Clip Bind- ing Posts, no extra charge. THE GIANT ELECTRIC CRANE and YOUR DOORBEEL ARE BROTHERS im “Pron ig ii &
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i National Champion World’s Champion Crowned “King of the Speedway”—WNational 2 Champion—at Ascot Park, Los Angeles on June 22nd. Crowned “‘King of the Road”—World’s Champion —at Marion, Indiana, on September Ist. Those are the high points in'the long string of Harley- ; Davidson triumphs on track, road and hill in 1919. Harley-Davidson won all five places at Ascot Speedway. At the Marion International Road. Race, 200 miles, the Harley-Davidson won First, Second and Third. Not speed alone won these great races, but speed and wonderful ruggedness. You may never ask extreme speed of your World’s Champion,” but its dependability and economy will make you a Harley-Davidson enthusiast, Harley-Davidson dealer about his Harley-Davidson Motor Co. Milwaukee, Wisconsin SIMPLE WIRELESS TELEPHONES AND HOW ASTRONOMY FOR AMATEURS. Here is your TO MAKE THEM. An elemental book. on the | opportunity to satisfy that longing to know some- principles, construction and use of an arc system of | thing about the heavenly bodies and to read the sky : S on a starry night. Written and illustrated so as to wireless telephony. Price, 25 cents postpaid. Book j be within the grasp of the average person. Price, Dept., Popular Science Monthly, 225 West 39th | $2.00. Postage, 10c. Book Dept., Popular Science Street, New York City. Monthly, 225 West 39th Street, New York City. Life’s Backbone of with the on your Automatic boy occu Health and ercises his wi PY Strength (Theonly cnc of S winter even- ings with In a short time ite ) If you are bat- Sue Double tling with func- Your tional weakness Strength in any form---if “The t, Brightest, Best andimprove your tones When home work is finished he needs the mental More Resisting Power and Vim than you in ites stories, li-balanced with nd 0 articles Buy ‘a copy of the November issue, out Beckbone, which py tender month, $2 per year. works, and what it will do for you. Send for it now every i Suite 310 The Sprague Pub. Co., 28 American Bldg., Detroit, Mich. PROF. ADRIAN P. SCHMIDT 1041 Sresdwep, w. v. day fon a roller slides for the table. The distances apart are indicated on the sketch. Cut the slots for the slides in two perpendicular pieces of furring which are fastened between C and D. The slots should be wide enough to take the shank of a fairly large bolt. Nai] a second brace C on the back of the easel opposite B. ToC the adjusting leg is hinged. Build a light, flat table, as shown, and set two bolts in the back-board which will slide up and down the slots in the easel. A stick H, hinged to the under, edge of the table, will keep it at the’ desired slant and can be héld at any point by the clamp attached to E~ also shown in detail. When the table is not to be used to put materials on, it can be laid flat and a picture rested vertically along its upper edge.—L. B. ROBBINS. Adjust the Radiator Curtain Without Getting Out N cold weather, when the blan- kets are on the auto hood and the. curtain is lowered over the radiator, it is incon- venient to ANT EMPES be getting Qe out to adjust them for varying de- grees of tem- perature as ROLLER CURTAIN the heat of changes. By arranging the curtain similar to a the ongint over- window, heats, the driver simply » shade, this releases the curtain trouble can, in a very great measure, be overcome.. Procure a spare window shade roller with a good strong spring and shorten it so to fit across the radiator of the car. Solder two fixtures to the edges of the radiator in a position which - will bring the roller just to the top of the honey-comb. Use black oil-cloth for the curtain and see that it rolls evenly on the roller. Insert a fairly heavy stick in the bottom hem so to prevent the curtain from flapping as much as possible. Run the cord down from the exact middle of the stick to a-pulley at- tached to the bottom of the radiator, from there along under the bottom of the car and up to the dash under the cowl. It can be led free of obstruc- tions by means of small pulleys. <A series of small tabs, attached to the cord at the dash, will serve to indicate when the. curtain is at any desired point over the radiator. The protecting blind can be used either by itself or in conjunction with one of the complete covers that are designed to protect the whole hood. If used with the latter, certain little adjustments to the cover may be found necessary.—L. B. ROBBINS. 4 4 j { { | ay | | | | |
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With that long TUNGSTEN Battery —the gift that cannot disappoint te the worry out of Christmas giving. Give a DAYLO — it is bound to please every- one on your list. Many styles and sizes —one for every need and every purse—and eacha beautiful,always useful, welcome gift. All leading electrical, hardware, drug, sport- ing goods and station- ery stores throughout the United States and Canada carry DAYLO, = | | The tight that says “There if
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with Trolley Fares! In three hundred and eighty-nine cities trolley-fareshave _ increased. This number is growing daily. These fares range from six cents to ten cents, Fifty-five per cent. of the of country, is affected. | Those wasted fares would soon pay ix a otumbia Bicycle. A Columbia is sure to get you there—and It makes you independent of uncertain time— Of delays: _ it gives you freedom from crowded stuffy cars, It means needed healthful, exhilarating outdoor exer- cise to keep you fit for the day’s doings. ae | -It means ownership of the highest grade, most service- __ “able bicycle on the the forty-year-old nameplate it bears. in the 1920 Colambia Catalog you will find. the ent model you want at the price you Pe reas in pane 73, sent immediately on request... WESTFIELD MANUFACTURING to Mfg. Ca. Your Rubber Boots and How to Treat Them TOTHING is quite ‘so soggy ‘and hard to dry out as a pair of and ber boots or waders—if you do ‘not know how. Most people try +o force matters by leaving the boots ts close to a stove or radiator or over a furnace flue—and take the life out of the rubber. Try this way, next time yoy get in over your depth or have your boots or waders spring a leak: Take the wet boots off as soon you get home. Do not leave bee: wet If left ina cold place, rubber boots be- come leathery and are easily punctured . socks in them—hang them at once on the line, and leave them there for a few days, rain or shine. If you are in an apartment house the janitor will have a store-place of some .kind up under the roof, no doubt. Remembering how dry attics are, set. the boots upright, with sticks to keep ~ the tops from sagging together and thus shut off circulation of dry air, Then forget the boots for a few days. You ought to find them nicely dried out. Take them -then into a lower room, put lightly wadded newspaper into the tops to hold them upright and in such a way that air can get in and out. Bring in the socks and fold them smoothly and put them under the boots, not into them, to draw moisture. In winter stand the boots in the cellar, not too close to the furnace, upon a box, about half way between floor and ceiling. Placed too near the fur- nace or kept in highly heated rooms above-stairs, boots lose their life. A very ugly cut in a boot-bottom can be repaired roughly by squeezing it full of bicycle cement at night. In the morning it can be used and will keep out water fairly well if not put — - to too hard usage. Rubber boots used “sanely and often will outwear those but seldom used and neglected in be- tween times.—GEORGE GILBERT. | ; | | | : i |
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Smokeless and Black Powders Money-Back Shot-Shells You can get your money back for The Black Shells if, for any reason at all, you don’t like them. Just take the unused part of the box back to your dealer, and he will re- fund to you, without question, the price of the whole box. BLACK SHELLS Smokeless and Black Powders You can get your pet load in smokeless or black powders in The Black Shells. A lot of shooters claim they take less “lead,” shoot closer, with The Black Shells because the primer and wide flash-pas- sage make them so quick. They are waterproof too. Go to your dealer for a free copy of the U. S. Game Law Book. If he doesn’t carry The Black Shells, send us his name and address with your own, and we'll send you the book by mail. UNITED STATES CARTRIDGE COMPANY, 111 Broadway, New York General Selling Agents: National Lead Company, Boston, Buffalo, Cleveland, Chicago. St. Louis, Cin- cinnati; United Lead Company, New York, Philadelphia; National Lead and Oil Company Pittsburgh; James Robertson Lead Co., Baltimore; American Smeiters Securities Co., San Francisco; Hingston-Smith Arms Co.. Winnipeg; John Hallam, Ltd., Toronto. Exactly the same guarantee that goes with The Black Shells applies also to (@s)CARTRIDGES There is no 22 Long Rifle cartridge as accurate at all distances from 50 to 250° yards as U.§.22N.RA Long Rifle Lesmok Cart- ridges. This is 50 more yards of accuracy than has hitherto been possible with 22 rim-fire ammunition Solid bullet for target work, Hollow-point bullet for small game. Cost no more than ordinary cart- ridges. Ask forcircularC-93. oree or a if ome g and air, hem ots, llar, | q fur- oms tom in will as = put - ig . | a if |
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FIT YOURSELF FOR THE BIG JOB Don’t hesitate any longer. There a greater demand for trained men now than ever before— greater opportunities—bigger pay—more rapid ad-. vancement. It's training that counts now—accurate jedge—a complete grasp of your trade. 5 Drake’s Books FOR HOME STUDY pave the way to the fat pay en- velope. Written in non-technical language that any man can grasp. Send the price of any book listed below. We will send the books post paid—you keep them: five days—if not entirely satistied return the: books and your money will be refunded in full. atherette « $2.00 Automobile Ignition. By Manly. ocket size. Leatherette $2.00 Automobile Start- ing and Lighting. By Manly. 1919 edition.- . $1.50 ‘The Ford Motor Car and Truck and Tractor > ‘$1.25 “ a short piece can ‘easily be taken off when necessary. To set up the device after it is built the motorcycle is pushed up the run- way on to the platform until the front wheel is alongside the box provided’ for it. This should be made to fit the wheel and prevent it from moving in either direction. The stand is then lowered and set into the slot in the plank. This slot should be large enough for the stand to slip in. and out of, otherwise it will not have a solid foundation while in action. If fitted with a good stand the supports should be solid-enough for use, and additional supports or braces can be attached, after a trial, if necessary. The chain is taken apart, the short piece removed and then reconnected around -the sprocket of the shaft.- A! pull the chain together so that it will not be necessary to loosen or adjust Everything‘ except the shaft and In operation the machine makes short work of the Lig wood-pile. the rear wheel every time the chain is taken off. When in place the chain ‘sheet iron under the stand. The maz, chine shown in the illustrations worked best when: using low gear with the PRON engine running as slow as. possible.| -There will be too much vibration if the, high gear is used. The speed of the, ‘belt can be changed to suit: different (machines without changing the speed, of the engine, by using a larger or, smaller pulley at the end of the belt, shaft. The pulley can easily be. made b cutting out a number of. disks from ‘ i-in. board and nailing them together. Several thicknesses of canvag can be glued and tacked around its face to make it smooth. An easy and satis-, factory. method of fastening this home-made pulley to the shaft. is, clearly shown in the drawing. | By AH Rider W BOOKS 4 | pair of special pliers should be used to | ~ Bi ithoutg _ 1N-PLAN JARDWOOD! BEARINGS / | if . $ SLOT THRU SHAFT!! yy Yy aunway? [Lid = | FREDERICK J. DRAKE & CO., . me prepeld books checked’ in this adv. Cor
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* The New Here it is—the new INDIAN Scout Model G-20! e The practical motorcycle for the. thousands! The Zs SS motorcycle of the future! New in conception—new. : 5 in design—new in construction—new in a hundred ig off important details. Vision and courage built it—made it powerful, strong and sturdy like its famous predecessors in the INDIAN line—made it one hundred pounds lighter than its big brother—the INDIAN Powerplus. Beautiful, well balanced and mechanically perfect, the new INDIAN Scout sets the high water mark as an ideal middle- ? weight motorcycle. It’s evolutionary in that some principles of design of the past have been discarded and new theories of construction, assured by gruelling, practical experience, have been incorporated. And INDIAN dealers the world over have taken to the INDIAN Scout like wild fire. Personal visits to the factory and peremptory orders for deliveries, rush orders by telegram and letter and cable from far points from dealers, even before seeing the demonstrating model, have assured a wonderful production for 1920. But the new marvelous middleweight model is only one fea- ,ture of the.new season’s INDIAN line. A wonderfully improved ‘bigger valved INDIAN Powerplus with exclusive Cradle Spring Frame for the maximum in power and speed and riding comfort, and the electrically equipped INDIAN Powerplus with two unit ignition and lighting system are outstanding features of the (INDIAN 1920 motorcycle offerings. INDIAN Leadership—supreme for many years—is now (assured for all the years to come. See your INDIAN dealer today. Phone him. Get (an immediate demonstration of the motorcycle marvels. HENDEE MANUFACTURING COMPANY Dept. 38, Springfield, Mass. : The Largest Motorcycle Manufacturer in the World | ed H A’ i il il iz
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The people who lived in the good days of the wise King Ca- nute thought he had the power to make the ocean recede at a mere word of command. Today the Bell Telephone Company finds itself in a position not un- like that of the ancient king. Its mere word will not hold back an ocean of expense. Rigid economy and the most modern methods of operation have made it possible for the Bell Company to keep its rates at a lower level than that of the commodities which it must use in.constructionandupkeep. But it has felt the rising tide of costs ON 5 <) ions A DISTANCE TELEPHONE 4 One Policy Modern King Canute just as certainly as has every business and every family. The one source of revenue of the Bell Company is the price you pay for service. If this price fails to cover fair wages and necessary materials, then both you and your telephone company must suffer. For one year the Bell Com- pany was under Government control. The government an- alyzed methods and costs; and established the present rates as just. All the Bell Company asks is arate sufficient to pro- vide satisfactory service to every subscriber. AMERICAN TELEPHONE AND TELEGRAPH COMPANY AND ASSOCIATED COMPANIES Learn Vaudeville Acting ray tage Work and Cabaret Entertaining successfully taught by mail. Your op) ity to enter fascina. , money- ing profession — to travel —see the world—as vaudeville actor or actress, My simple, easy, complete, Professional Course —only one of its kind—COVERS ALL BRANCHES. Develops One System Universal TAMMER wore A scientific method that- “kills the fear’’ of stammering. Re-education the key. This marvelous method fully outlined in an accurate, devendable, worth while book—‘‘ HOW TO STOP STAMMERING” Mailed on receipt of 10 cents. The HATFIELD INST: 109 N. Dearborn, CHICAGO WHITING-ADAMS CAMEL, BADGER, OX AND FITCH HAIR Extensively used by the leading Manufacturers of Automo- i biles, Cars, quality Color and Varnish Brushes. for Illustrated Literature _ JOHN L. WHITING-J. J. ADAMS CO., Boston, U. S. A. f es, Furniture, and other users of best Making Blue-Prints on Old Negatives accumulates a number of enn plates or discarded can be utilized by making blue-prints on them. For certain kinds of gyp, jects, especially of marine views no prettier pictures can be made tee blue-prints. |The process is simple and the procedure as follows: Make a strong solution of hypo, say about 1 oz. of hypo to 3 oz. of water, and add a saturated solution of red prussiate of potash until the hypo is decid, yellow. Lay the negative in this goly. tion until the image disappears. If the solution is too weak add more potash solution. Then remove and wash well in half a dozen changes of water for five minutes in each water. The plate is now ready to sensitize, The sensitizing solution is composed of the following ingredients: (a) Fer. ric ammonium citrate (green, if pos sible) 220 grains, water, 2 oz; (6) potassium ferricyanide 80 grains, wa- ter, 2 oz. Make separately and mix equal parts of a and b when ready to use, The mixed solution will keep several months if kept in a cool place and away from light. If any powder ad- heres to the ferricyanide wash it off, so as to use nothing but crystals. Soak the plates in the above solu- tion for fifteen minutes. This must be done by gas or lamp-light. Re move the plate, and, taking it by the edges, twirl it vigorously to remove all superfluous solution. Then dry in the dark. Print from ten to fifteen minutes in direct sunlight. As the plates cannot be examined like paper, it will be necessary to experiment with a few to ascertain the proper printing time, Then remove the plate from the holder and place it in a tray of clean water, Cover the tray to exclude light and let it soak half an hour. Then rinse in two or three changes of water, let- ting the plate soak for a few minutes in each change of water. If the negatives used in making these blue-prints on glass are good, the resulting transparency or positive will be surprisingly beautiful. The blue transparency may be backed with ground glass, such as can be bought at any photo-stock house, and then bound around the edges with passe partout paper. They make beautiful or- naments for hanging in windows or - suspending from some object in a room where the light.can pass through them. These may be used as lantern slides if cut to that size either before or after making the picture. Films may be used in the same way, except that they would not be safe in using as lantern slides because of the explosive material in them.—H. E. ZIMMERMAN. A i il 1 ; i | | | Personality, Confidence, Skill and tells you just we ~ how to get on the Stage. Send 6c postage for il'us- ey trated booklet ‘*All About Vaudeville." State age and occupation. Frederic LaDelle, Sta.275, Jackson,Mich. Z # from ting Adams 3 of As a\ — Bo m Brush Manufacturers for Over 109 Years and the Largest in the World |::
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Awaiting your say-so, you'll find toppy red bags, tidy red tins, handsoine pound and half-pound tin humidor: — and— that classy, practical pound crystal glass humidor with sponge moistener top that keeps Prince Albert in such perfect condition ! R. J. Reynolds Tobacco Company Winston-Salem, N. C. LONG BURNING PIPE TOBACCO. ALBERT the national joy smo ke ie? Copyright 1919 by R, J, Reynolds Tobaccc C>, P. A. has such a joy’us way of making men glad about jimmy pipes! To shoot it quick :—Prince Albert turns over a new leaf in your smoke- career ! Shovels smokesorrows right out the attic airshaft and throws wide open the smoke-section-shutters ! Talk about letting in a flood of smoke-sunshine! Bet your pet luckystone that the best you ever heard tell about can’t hold a candle with what Prince Albert will hand you seven days out of every week ! And, then, someé-on-the-side ! Smoking Prince Albert is just about twins with having the top time of your life on each fire-up! It gives you a brand new idea of how delightful a pipe smoke really can be! Such flavor and fragrance and coolness; such freedom from biteand parch! Provepersonally that Prince Albert’s exclusive patented pro- cess really does cut out bite and parch! Talk about ringing the bell every time you take just one more little smoke ! You'll agree with your old fellow citizen, General Approval, that Prince Albert puts a man on the firing line with a jimmy pipe, and keeps him there ; that it sends all previous smoke setto records to the rear-ranks ; that it just slams in one good time on top of another so fast, so happy-like, you realize that heretofore you’ve been hunting regular-man-sport with the wrong ammunition ! | ‘ | ub- re all’ ithe es in Re l be few older rater. ; and z00d, RINGE ALBER The i | yught passe il or- ge if Ji des CRIMP cut y be im they ; if ntern terial
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A Glimpse Inside the COASTER BRAKE You can’t TELL about a coaster brake from the outside. You've got to see inside to determine its efficiency. Have a look with us at the inside of the Morrow. Inside the rear hub is an expanding ‘drum’ of spring-steel, carrying bronze ‘brake shoes’. When you back-pedal, the drum is held sta- tionary and four small wedges (two from each end) drive into and expand it, forcing the brake shoes into contact with practically the entire inner surface of the hub. Your bicycle can stop in its own length witha MORROW, When you forward pedal, the wedges are forced outward instead of inward, leaving the drum neutral, and expanding the driving rings, which, in turn, grip the inner hub surface and drive your bicycle forward swiftly and easily. When there is neither forward or backward pressure on the pedals, both drum and driving rings are neutral, and the rear sprocket remains stationary, permitting the smoothest, easiest coasting known to bicycling. 1 Braking surface 6 3-10 8q. in.—much larger than otherbrakes. yd ‘Drum’ expansion forced equally by two wedges at each end, insuring even braking distribution over entire inner bub surface. 3 Bronze brake shoes being softer than hard steel inner surface, grip smooth- ly firmly, surely. 4 For forward pedaling, the Morrow re- sponds instantly and positively. 5 More ball-bearings than other brakes, 80 coasts more easily 6 The Morrow is strong and sturdy; it will stand hard wear Ninety-five inspections, followed by a final test,guarantecing perfect service. ECLIPSE MACHINE COMPANY ELMIRA, NEW YORK Demand the MORROW on the next Bicycle you Buy Representatives in Every Facto: ‘nventions and discov: trom the skilled workmen in the tactory. hasn't yet seen the light? Show your Popular Science tatives in every factory in the country We want rep’ Monthly to some discerning soul today. It will mean mo to you if you make good. POPULAR SCIENCE MONTHLY, 225 West 39th Street, New York WANTED ry If you feel any debt of gratitude to Popular Science Popular Science Monthly keeps abreast of the times in new Monthly for its being alive and coming your way, eries. Many of the new ideas come | won't you pass the word along to some friend who E HB BALL BEARIN« LOWER POWER COST—BETTER POWER HB Ball Beari lotors Ideal power for factory $20 BRINGS YOU ANY HB MOTOR. BALANCE on EASY TERMS _ Sizes 1 to 15h. p. A size to meet your needs ELECTRIC MOTORS ng ore ical, more dependable, better every for heavy duty garage and machine ete. HOBART BROTHERS CO. Box S115 Troy, Ohio Successful Manufacturers Since 1893 Make a Water Circulator for Your Ford ORE than one case of enc M trouble in the Ford mann traced to sluggish water clreuleaia The water in the thermo-syphon gyg. tem of water circulation is never jp rapid motion as it is in any of the engines equipped with a water-pump This article describes a simple de- | vice, which may easily be made and inserted in the cooling system of the Ford or other car minus a mechanically driven water-pump, to create a con. stant and positive water circulation, The device consists of a short length of l-in. gas-pipe, several circles of — sheet-iron, a stiff brass rod, gas-pipe cap, small pulley-wheel, short bolt and another short length of pipe, This latter is brazed into the opening in the gas-pipe to lead the water to the hose connected to the bottom of the radiator. A spiral, made of the sheet-iron circles, revolves in the gas-pipe, being PULLEY The action is not unlike the screw mechanism of a modern grain separator turned by a round leather belt which is slipped over the fan shaft. It forces the water in a constant, steady stream from the jacket about the cylinders to the bottom of the radiator. Procure a 6-in. length of 1-in. gas- pipe, which is free from flaws of any sort, and thread both ends. On one end screw a reaetio" nipple of the proper size to slip tightly into the hose leading from the engine. On the other end screw a tight-fitting pipe cap. See that the joints are tight and then, with a sharp drill, bore a hole Yy in. in diameter in the center of the © cap. This is to act as one bearing for the shaft of the spiral. : Next, drill a 34-in. hole in the other end of the pipe, 1 in. from the end, as shown in Fig. 1. Fit into the hole a 114-in. bolt, 34 in. in diameter, and in the center of this, equidistant from each end, or in the center of the pipe when in place, drill another hole % in. in diameter. This is the bearing for the other end. For the shaft, procure a 7-in. brass rod which will fit the hole in the pipe cap rather snugly. The other end is cut. down with a file to fit the hole in the bolt. Now for the spiral. From medium heavy stock cut four circles of sheet- iron, of the right size to fit tightly enough in the pipe to enable easy turning. The sheet-iron should be well galvanized so as to take solder. Drill a hole in the center of each circle ? ( Brake =.) | STURDY, SURE 4 — q “ } v0) | or the iG) | Morrow Us e ‘ Why Pay Full Prices ce Customers write of $25 to $250.00 by buy | Service Department frase diamond, matches and jewelry as security When these current available, Hondredeof bargains are to our bullet. Planned for, best requits at least, cost, sent on approval. ‘dar for ‘full Information. Ask ‘also Latest List of Diamond Loans j hargers Gene latest Every 40S. DeROY & SONS 4756 DeRoy Building
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the der. ircle “Think Beyond Your Job!” “There is not a. man in power at the Bethlehem Steel Works today,” says Charles M. Schwab, in the American Magazine, “who did not begin at the bottom and work his way up. These leaders rose from the ranks. They won out by using their normal brains to think beyond their manifest daily duty. “Nine years ago Eugene Grace was switching engines. His ability to outthink his job, | coupled with his sterling integrity, lifted him to the presidency of our corporation. Last | year he earned more than a million dollars. “Jimmie Ward, one of our vice-presidents, used to be a;stenographer. But he kept doing He was thinking beyond his job, so 1 gave hima ff things out of his regular line of duty. “4 better one. And he has gone up and up. The fifteen men in charge of the plants were selected, not because of some startling stroke of genius, but because day in and day out, they were shinking beyond their jobs.’ What about you? Are you satisfied just to hang on where you are? If so, rest assured that’s as far as you'll ever get. But if you want to be sonrebody, to climb to a position of responsibility, get ready for it. Do what you are doing zow better than the men beside you and train for the job ahead. You can do it—in spare time—through the International Correspondence Schools. For 28 years men of ambition with I. C. S. help have been making spare hours the stepping-stones to successful careers. Last year more than 5,000 reported that their studies had won for them advancement and increased salaries. In the Bethlehem Steel Works alone over 100 men right now are putting their spare time on I. C. S. courses and thinking ahead, getting ready for the better positions that surely await them. And over 130,000 others in offices, shops, stores, mines and mills and on railroads all over America are preparing in the I. C. S. way to take the next step upward. Join them! All you need is just ordinary brains, the will to do, and the firm resolve to think ahead of the job you now hold. The I. C. S. are ready to make the rest easy. Make your start, take the first step right ‘now. Mark and mail this coupon. our HERE. TiNTERNATIONAL CORRESPONDENCE SCHOOLS BOX 7657 , SCRANTON, PA, lain, without obligaung me, how I can qualify for the post- eae or in the subject, before whichI mark X. Electric Lighting and Rall ectric Lighting Electric Wiring Telegraph Engineer Telephone Work MEOHANIOAL ENGINEER Mechanical Draftsman Machine Shop Practice Gas Engine Operating ENGINEER. Surveying a pping MINE On EER STATIONARY ENGINEER SALESMANSHIP ADVERTISING Window Trimmer Railroad Trainmana ILLUSTRATING BOOK KEEPER Stenographer and Typist Cert. Public Accountant TRAFFIC MANAGER I [ | Marine Engineer | | [ | OD ENGLISH Ship Draftsman Teacher ARCHITECT Common Schoo! Subjects Contractor and Builder hematics Architectural Draftsman CIVIL SERVICE Builder Railway Mail Clerk Str 1 Engineer AUTOMOBILE OPERATING PLUMBING AND HEATING Auto Repairing Sheet Metal Worker Navigation Tex Overseer or rn CH Poultry Ralsing Name — Present Street and No.. City State. may send this coupon to | j | | w | hich | rces eam ders | gas- | one th e the ; pipe and if hole the f ii for ther | | d, as le a and from \ 8 in. Card Writer | for = bed yrass i | end ant hole i a 1um heet- rhtly easy 1 be
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Fun. Health and We back this Trade-Mark with our Reputation, ’ For young or old— for shop or school— for work or play—a DAYTON BICYCLE provides quick, depend- able, cheap transportation—with a lot of fun and mild, health-building exercise thrown in! Remember: Handsome, splendidly designed, easy-running, long-wearing, and built and backed bya great fac- tory with twenty-five years of bicycle experience—that's the Dayton! Remember: The Dayton is made in the world’s largest factory devoted to the manufacture of bicycles. Remember: Every Dayton Bicycle bears the famous "Davis-Made* trade- mark—your absolute guarantee of top quality and complete satisfaction. Remember: Christmas is coming! A Dayton is the best of all gifts! See the Dayton at your dealers. Write us today for Catalog 44. _Cycle Dept., THE DAVIS SEWING MACHINE CO., Dayton, Ohio many frien ciate and enjoy Popular Science Monthly? Show issue to some friend today. It will help the cause. LEARN AUTOMOTIVE ELECTRICITY In the automobile field the men who get the big pay—who always have jobs waiting for them—the men who have the light, clean wore —are the experts in automotive electricity. So great is the demand for trained men, so tnsist- ent are auto men for training, that we have established a school to teach all branches of ghting, Jgnition Ho ds can you think of who would a = this for autos, trucks, tractors, airplanes, motor boats and farm lighting Faculty of auto- motive electrical experts. Henry E. Peers, batteries; W M. Littlewood, Univ. of Wis. starting and lighting; Jas. G. Zimmerman, E © . ignition; D. P. Moreton, B.S. E. E., Dean. Course is 8 weeks of 44 hours each of indi- vidual instruction on standard equipment Classes limited to 20 men—a new class starts every second Monday Write for terms and classes open. AMBU ENGINEERING INSTITUTE 602-1603 Michigan Ave., Chicago Write at once for the best Aut mobile Offer PROFITS (“harsing Batteries YOU Making Electric Lights ‘ine. perience required. € BIG MONTHLY PROFITS Small Payment Puts This Money- Maker in Your Garage Balan: its quickly and pay for Absqute lopey- uarantee ment gladly advises sizes best suited to Fail informe ead and ir tel NOW Hobart Brothers Company Box S116 Troy, Ohio Successful Manufacturers Since 1898 to take the brass shaft, and make g cut from the rim to the center, ag shown in Fig. 2. These separate disks are bent so that when the ends ape soldered together, they will form 4 continuous spiral of four turns. They are slipped over the brass shaft and soldered in place. See Fig. 1. When the spiral is finished, put the bolt bearing through the hole in the WATER FROM CYLINDER JACKETS — Showing how the water is circu- lated through the cooling system rear end of the pipe, so that the hole is in line with the length of pipe, mak- ing the place tight by using heavy washers of leather and screwing the nut down tight. Slip the spiral in place, with the small end through the hole in the bolt. Cut two or three other leather washers to fit snugly on brass shaft, and of the right size to fit tightly into end of gas-pipe cap. After slipping cap over end of brass shaft, screw cap on tight. If the spiral turns easily and every- thing is properly aligned, take it apart, and cut a %-in. hole in the pipe near the front end, as shown in Fig. 1. This is to take the hose connection. The hose connection may be of gas- pipe of the proper size, or heavy sheet- iron bent to form, and is either sol- ‘dered in place or brazed. Assemble the circulator again, make the hose connections tight with the usual screw clamps, and see if the packings are watertight by filling the radiator. If everything is ready, put in place the grooved pulley. Get a small, half-round grooved pulley-wheel, or make one of babbitt, wh | DRILL Ye DISK FIG.2 BOLT, Holes are drilled in the separ- ate disks to take the brass shaft and fasten it on the end of the brass shaft with a set screw Connect it to the fan shaft with a round leather belt. Aside from an .occasional replacing of leather gaskets, it will require no attention. Since the pull of the belt is light, this device will require no support save the hcce connections. The speed of the spiral is governed by the size of the pulley-wheel. This ‘should be about size of fun shaft. = | 1) | | 4 HERE’S YOUR CHANCE | /7; | q | | q | f ee Make your electric lights for as low as 2c. per : KW, and at the same time get profits 3 of $100 to $150 per month charging bat- ‘@' | | teries. The HB Lighting and Battery Charging Set does it for you Sturdy
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LT Make Your Own Lead Boiler Gaskets in mine plants, water- tube boilers are installed, which require gasketing every 80 often. The gaskets are expensive when they are bought, but with the outfit here described they can be easily and ly made. giustration shows a tool that has been used by engineers in mine and t The mold is made of }4-in. sheet- iron in two pieces, with circular grooves cut in them, as shown above manufacturing plants, and which has been copied and modified to suit local conditions. With very little experi- ence, a man can mold enough gaskets in his spare time to last for a long while. Lead deteriorates, but if care is exercised in preserving all of the metal and the gaskets, it may not often be necessary to use new metal. The mold is made of two pieces, Fig. 1, of 14-in. sheet-iron, which can be turned upon a lathe, the faces being machined so that they will form a perfect joint when placed together; otherwise the molten metal would work out through the joints of the mold. The size of the mold naturally depends upon the size of the hand-hole of the boiler. If the boiler has 4-in. tubes, then the hand-hole will be slightly larger. In this particular case the mold will be about 6% in. in over-all diameter. The two parts of the mold are duplicates of each other. A square-cornered circular groove is cut in each face, about 3 in, wide and 1/16 in. deep, with an outside diameter of 5 in. Each part of the mold has a handle, ‘Fig. 2. The handle is made of a 3-in. bolt, flattened so that it can be held in a vise. This is screwed through one part of the mold. The projecting end has its threads machined off, and is used for a dowel or centering pin, fitting snugly into a hole in the other part of the mold. The handle is made of wood, asbestos, or any other sub- stance that will not conduct heat. The handle of the mold is made from a 3-in. bolt, flattened so -that it can be held bya visé When the gasket mold is assembled, the two parts are held together, and the molten metal poured through”an $3 bee Bre This ts Duracord. Here ts the ordinary Thick, hey strands, braided cable covering. woven like @ piece 0 Note the open and fire porous consiruction, Picture shows outside easily ey — * covering only with im- unraveled. Compare it with Duracord. pregnating compound i aN is the dominant. feature of ~ TRADE -MARK ON’T believe that Duracord is the best portable electric cord made until you prove it to yourself. Send for samples of Duracord and the ordinary braided cord. Test them any way you please. Show them to your electrician or superintendent. You will readily see the superiority of Duracord. For any portable electric cord that is sub- jected to hard service and abuse, mechani- cal strength is absolutely essential. You get this strength in Duracord —because it has a special covering of fine quality cotton woven like fire hose—not braided. This .weave gives the covering a wear resisting quality without which the best of copper and in- sulation are wasted. Ask your electrical jobber’ about Duracord or write us. TUBULAR WOVEN FABRIC CO. Pawtucket, R. I. Makers of Duraduct, Flexible Non-Metallic Conduit 4 A fy as ‘ar 1 | ol- A im ke he a | = | i VAIN ON IN er ig ng t no UN FIG. 2. no f
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toMake More Money? tingling, supreme health of body, combined with energy and fearless- ness of mind, will insure you the power, leadership and efficiency that com- 1 success. The course on “Mind and astery ” by Orison Swett Marden, M.D., A.B., will make you master of any situa- tion in busness and in social life. The world’s greatest leaders are friends and admirers of Dr. Marden. John Wanamaker says: ‘‘Had I seen such a course when I first started towards mercan- tile life, I would, if it had been necessary,. have been willing to have gone without at a least one meal a day to have saved enough oF money to buy it."" Theodore Roosevelt wrote: on “Iam so deeply touched and pleased that I = must write and tell you so.’ Charles M. | Schwab “ Dr. Marden’s writings have had much to do with my success.” ea Orison Swett Marden, M.D., A.B., is one | army of success. Read and use the coupon below. This lesson will help you / to greater : power, position, ric 3 Put a check beside what you desire. and address ; FRANK E. MORRISON, Dept, 200, 1133 Broadway, New York City - Piease mail me Dr “Mind Mastery i is under- that thie be allowed if I decide to pur- chase the complet e $3.60 course. making the additional } price only $3 35 4 Please mail me Dr Marden's complete course of 32 a success-compelling lessons telling how to,be alre enough ; to make more money lenclose$3.60 If within ten days } declare myself unsatisfied, you will refund the full amount gee aperture atthetop. This holeis 34 in. wide and the same depth in each half of the mold. ee Having made the mold, and having at hand a crucible, lead, small ladle, and a pick, we are ready to pour the gaskets. The pick is used to free the gasket from the mold. A small ladle is best for pouring, as it can be more easily handled than a larger one. After the lead is melted it is a good idea to submerge the mold in the molten metal until the former has heated sufficiently to prevent the lead from freezing to it. upon this point more than on any other. When pouring the metal, it is essen- tial that one work fast. Do not forget to oil the mold after using it, for this will keep it in good condition. A Toy Electric Signal for Miniature Trains LTHOUGH very simple to make, this alarm signal works very well, and gives a realistic finish to a Success depends | Made to Your Measure ALLWOOL SUIT paid, for you to try on, to inspect and examine. Un- less you are well pleased with your bar- gainyou trial order will not cost you one cent. Write us today — Send us a postal today for a copy of our big new catal and style book with 65 clot samples of the very finest, high grade fabrics and latest NewYork andChicagostyles. Our prices will surprise you. We guarantee to save you 25% to 40% or no sale. Deal Direct — Save Money Any member of your family can take your measures. We guarantee a perfect fit. Youtake absolutely no risk. By dealing direct with us, the manufactu you save the unnecessary expenses and profits of agents and obtain the highest de metropolitan tailoring at a wonderfu saving. Write for Catalog Today — We'll Send It Free! THE BELL TAILORS Dept. 266 Adams at Green St. Chicago, lil BE A REAL MANI Look Like One and Feel Like One Broaden your shoulders, deepen your chest, enlarge your arms, and get a devel- opment that will attract at- tention. Fill yourself fullof energy and be powerful MY NEW BOOK “Muscular Development” Wilt Explain How This book is illustrated with 20 full page photographs of myself and of some of the world’s finest developed ath- letes whom I have trained. It will interest and benefit you greatly. Send 10c ‘stamps or coin) for @ copy NOW?" today, while nd. SIDE VIEW END VIEW CONTACT POINT iB TERMINAL CARDBOARD —_ TERMINALS With this working model you can obtain an idea how real signals work on a railroad toy railroad. To the lad who owns an electrically operated line it is both in- teresting and instructive. The materials needed are an old electric bell, a piece of stiff cardboard about 4 by \ in., and a piece of wire. Insert the cardboard under one of the rails and bend it as shown at C in the illustration. If there are none there already, screw two additional ter- minals A and B into the supply plate on the opposite side to the main terminals. Run a wire from the con- tact arm through the terminal A to one terminal of the bell D. Connect the other terminal of the bell to the terminal B, and thence to the charged third rail. When the train passes over the con- tact arm contact is made, the cir- cuit is completed via the wheels and body of the train, and the bell sounds the alarm. The signal is very realistic. when used in connection with a model level crossing. —ROBERT SCHMITT. ELECTRICIAN’S WIRING MANUAL By F. E. SENGSTOCK, E.E contains all the essential infor- mation needed for the proper installation of lighting and power systems in houses and other buildings. This manu- al is written in simple, plain English by an Electrical Engi- neer with many years’ experi- ence on the Chicago Board of Underwriters. Profusely il- lustrated and contains many tables and formulas. New edi- tion out Nov. list. Pocket size, flexible binding, 448 pages, Price, $2.50 postpaid. Book Department POPULAR SCIENCE MONTHLY 225 West 39th Sireet,; New York City e Make every sult to your individual measures from the eq exact fabric you select and > according to your exact speci- fications. We ship it on ap- 4 proval, delivery charges pre- Te | Mi ia ‘ Gay \\ \ \ Choose ‘ CATALOG ee | Beautiful FREE i | PELL | | | 4 | | e | |
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Emergencies Take precautions when the accident occurs. The germ is mightier than the sword. Keep New-Skin on hand and use it prompt- ly as directed. “Never Neglect a Break in the Skin.” J / Snap! Goes the lead! —and-with it minutes far more valuable than the pencil itself. Such embarrassments may be avoided and ease and rapidity in work secured—by using ELDoraDO the master drawiig pencil!” Write for our pencilogue .“‘Finding Your Pencil”? and learn what a difference the right Eldorado can make in your work. Ask your dealer for your Eldorado, or write us enclos- ing 10c, and oe us what work you do. Pencil t Dizon 120-J Jersey NJ. Canadian Distributors A.R.Mac. Dougall & Co.. Ltd. Toronto | There’ 's a Dixon-quality Pencil, Crayon and Eraser every purpose. OWN A LABORATORY twenty (20) ete. ‘Chemicals of 5.00. ORGANIC CHEMICALS Set of forty hydrocarbons, mines bottles—includes TECHNICAL EQUIPMENT COMPANY th Street, Dept. 2A New York City 22-26 E. 17 Making a Combination of the Level and Door-Jack > COMBINATION of a level with a door-jack may sound incon- gruous, but it is nevertheless exceed- ingly practical. On odd jobs the car- penter is often hard put to it to find some way of holding a door or window for planing and mortising in the butts. It does not pay him to carry along a door-jack just for one or two doors, How the carpenter’s level can be made to do away with carrying a door-jack and it is equally unprofitable to make one up on the job or to do without. one. The combination level. and door- dentally embodies a very practical door-jack which will be new to many carpenters. Iti is simply made by cutting a wide notch into-the.upper-edge of an ordi- | nary wooden level near the end remote from the plumb-glass, the notch being beveled on one side and wide enough to accommodate the stile of a standard door and a wooden wedge operating against the door and. the beveled edge. The dimensions given in the drawings show a notch and wedge which | will hold securely in place a door anywhere from 1) in. to 134 in. thick. The operation explains itself. The level is put on the floor, the end of the door set into the notch, and the wedge lightly driven in. This clamps the door firmly and gives an excellent footing, while there is nothing to in- terfere with the work. Since a level has to be carried along on almost every job, only the wedge needs to be taken along extra, or one can be made in a couple of minutes. On the other hand, the notch in no way detracts from the utility. of the level, nor does it weaken it any more than it is weakened by the mortises | for the level-glasses. The level is as good as ever, and the carpenter has his door-jack along when he has his level— HENRY SIMON. “YANKEE” Ratchet Tap Wrench Taps Anywhere You Can Drill a Hole No hole can be drilled out of reach of the“YANKEE”® Ratchet Tap Wrench. It Ratchet movements found in “YANKEE” Drills and Screw-drivers. Can’ be ad~ justed at a finger-touch for, Right-hand, Left-hand -or, Rigid action. Has knurled head for convenient ‘holding; or for starting or backing out} taps quickly with the fingers. ~ jack removes this difficulty, and inci- | Then there’s the sliding cross-bary, Frictiori device holds it central,.at either end, or it is'‘removable entirely for close packing i in tool box. With ‘the combination of sliding bar and Ratchet movement, you can tap, threads: in holes close to walls or shoulders, in corners, or even in narrow spaces where there is only ‘room to move the bar to-and fro an inch, No. 250—Length 3% in., Diame= , ter Chuck, 9 in. Holds up to Photographs 3/16 in. Taps .. Price $1.65 show work .No. 251—Length 5 in. Diame- that could . ter Chuck, % in. Holds up to notbeaccom- 5/16 in. Taps RRO Price $2.05 plished with No.1251—Length 13 in.—for work an ordinary requiring long reach; otherwise tap wrench, same as No. 251....Price $2.65 Write for free “YANKEE” Tool Book, illustrating these and other “YANKEE” Tools Dealer in action. / Shows many Can easier, better ways of doing, Supply You. has the famous“YANKEE” = ‘ N ay, | Cy) | ig | | ~ ‘ North Bros. Mig. Co., Philadelphia DYES 25 different colors for uyeiug cotton, wool, silk Material ‘ Pp ana sufficient for dyeing scores of skeins. Set includes five wool cotton skeins, two dyeing chemicals and spoon measure. Neatly OO AN i TOOLS
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(CHANGING condi- tions have not altered Florsheim qual- ity. -You-get-superior style, fit and workman- ship as heretofore,— value for price you pay. Consider the wear, not the price per pair. Look for the quality mark ‘‘Florsheim.”. The Florsheim Shoe Company CHICAGO, U. S. A. Secure Wholesale Rates OFFER so you can try these famous by mail. $6.63 for the set. On receipt of $1 we send splendid shirts and handsome silk neck-tie parcel post C.O.D.$5,63 and postage. Six Months’ Wear Guaranteed These shirts are made of finest white percale shirting fabric with neat stripes of blue, black and lavender, One shirt of color to the set. Cat in the popular coat style, outs laundered v ‘ashionable . ptanderd sizes . Choose your colo: Money back not pleased. ve 4 WRITE DURATEX y ketbook t d for it and be your own =e Sealers’ profits on ail you tuy. It’s the only real way to save. Wearer agents make extra money in spare time. GOODELL & CO., 549 DURATEX BLDG., NEW YORK - Largest mail order wholesale haberdashery house in the world POATES’ HANDY ATLAS OF THE WORLD This isa little 5’x7" volume of 120 pages--a little brother to Poates’ Complete Atlas. Printed from brand-new plates with Maps in three colors. Water in blue—Mountains in relief--and all Railroads named. Shows each State of the ( nited States, all the Provinces of Canada, and the Continents of the World. * Price in cloth, $1.00; in leather, $1.50, Postage, 10c. Book Dept., Popular Science Monthly, 225 W. 39th St., New York Things You Ought to Know About a ONSIDER the above illustration as taken anywhere in the United States. Let us look at it a moment. . The house has a good foundation, is rat- and mouse-proof, and safe against frost. It has the usual pine frame construction, sheeted with matched lumber, covered with paper, sided with lap siding, and then all joints painted perfectly airtight. A most beautiful job, worthy of a good archi- tect and builder. They are to be congratulated so far on their ability to build a warm house. Now look again. Do you see that ladder for a roof-board, a two-inch space or hole every three inches clear to the peak? Will that hold a particle of heat? The main thing, in building, is to construct a warm house; and that surely will not do it. Shingle Roofs Are Not Heat-Tight Let us look again. On the studding on the inside you have lath, plaster, and wall-paper. On the outside matched sheeting, paper, and siding painted. There is also an insulating four inches of air-space between the ‘sheeting and plastering on thestudding. Hot air and heat cannot go through all of that, and so it goes clear up to the plate. But right over the plate on the ‘roof are the two-inch spaces of the roof-boards. The architect and carpenter will tell you all that will be covered when you get your shingle laid. But will it? No, it will not. Why? Because there is a crack be- tween every two shingles, and ninety per cent of these cracks end in one of the two-inch cracks of the roof- boards. In a sturcture 16 by 24 ft. the cracks between the shingle are equal to a hole in the roof two feet square. Let us look at this from another. angle. Three years ago I was in a Southern city during a wind- and rain- storm, and it was said that there was not a house in the city covered with shingle but had the ceilings ruined by SS the rain being blown up the cracks between the shingle and on to the ceiling, leaving a stain. . Here is another trouble with that kind of roof. It seems at times as though all the dust and soot of the whole town was in the garret. How did it get there? The wind blew it up the cracks in the shingle, making the garret extremely dirty. There is still another fault with — that kind of roof. Why? On ac- count of the same cracks between the shingle. On hot days the heat is blown up the cracks into the garret and is dis- tributed all over the house until it isa fiery furnace. Whose fault is it? Yours partly; or perhaps the architect’s if he gave specifications without stip- ulating paper under the shingles. And he must specify the roof as well as the - outside of the house, for the carpenter claims that the roof is not part of the house when specified, ‘‘house to be papered.” He must plainly specify “paper on roof-boards under shingle.” One carpenter explained this by saying that the roof was not a part of the house. A Roof that Lasted Fifty-two Years” Shingle will last three times as long on a tight roof as they will on a roof- board built ladder fashion. I have some shingle.in my office that were on 2 roof in this city fifty-two years. It was a tight roof and the mark of the soot and water does not extend one and one half inches from the crack of the two shingle laid on. top, showing that there was very little to dry out. I showed them to a carpenter and he said.that they had better timber those days than today; but hold on —can they find another roof covered with the shingle that came out of the same car that has lasted aslong? No. They were put on open roof-boards. A shingle put on such a roof-board will last only from twelve to sixteen years. Does it pay? Roof Before You Build | | NY | | | | | “Write for | | booklet “Styles | | of the Times” M Send only $] JXMA | | |
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The saving in your coal bill, with paper under the shingles, will be on an average of seven dollars a year. You will save money by paying the car- . penter his price and having a tight roof, and be better off in every way. If it could be done I would like to make a contract for putting tight roofs on all houses in the United States and keeping them covered with paper and shingle for the next fifty years for the saving in fuel. I would be the richest man _ in the world. If the government is interested in conserving our babies and our coal supply, it should pass a law com- pelling everyone building a house to have a matched roof-board and have it covered with paper under the shingle. It is strange that the car- penter is willing to put on a tight roof and cover it with paper when he is put- ting on an asbestos or manufactured shingle. Why? Because the manu- factured shingles are all one width. Use Good Brick in the Chimney More houses burn on account of the poor construction of the chimneys than from any other cause. Some masons will tell you that you can save a little if you get two grades of brick; that you can put the soft cheap brick under the roof and the hard brick out- side. Don’t doit. The soft brick, if ‘under the roof, may slack, as I have ‘known it to do, and a spark go through the hole and set the house afire. ‘Rather put the best brick under the roof, where they are safe, and the cheap ones outside. Then you can see them when they go to pieces and renew them... In cases where a fire has started around a chimney, a tight roof has been known to smother it. The type of construction now in use throughout the country Your carpenter should not drive the shingle nails opposite each other. The shrinking and swelling cracks the shingle. Put one nail about two inches above the other on the sides, two nails to a shingle, and use galvanized nails. They will last as long as your shingles if they are properly and securely put in. ~The Aighest honor ever paid fo any smoking tobacco we the International Jury at the San Francisco Exposition awarded the GRAND PRIX to Velvet, they paid it the highest honor within their gift. Never before or since has any pipe tobacco been officially recognized as the supreme product of its kind. This award was: given Velvet, by an impartial jury of the highest standing, not because of Velvet’s nation-wide popularity but because of it’s “superior quality.” The Jury’s decision was based on the following well-established points: Velvet Smoking Tobacco is a se- lected, naturally-matured tobacco, aged in the wood for over two years. This natural curing is recognized | as the superior method of maturing 7 pipe tobacco. Toachoice quality of leaf, brought to full maturity by natural meth- ods, Velvet owes its unusual mild. ness, mellowness and flavor. The makers of Velvet were gratified by the endorsement given Velvet by the Expo- sition Jury and take just pride in the secure place that Velvet holds in the estimation of real lovers of good pipe tobacco. © LIGGETT & MYERS TOBACE BA g | > | ¥ . | at as ON 4 a CMKXN 2 | i d e | e | = ad
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J “Fie Sustained Speed Counts Getting- more out of ma- chines may not demand an increase in production-rate so much as a decrease in the time and production lost when your machine runs behind a reasonable rate-. of-work. ‘A standard speed steadily main- © tained will net more output in a day than occasional spurts with the usual falling-back, where pro- duction isn’t known until it’s counted after the run. COUNTERS record machine-output as fast as the product is made, so your machine can be operated at the best rate-of-work that is practical as a i steady pace. The small Revolution Counter below registers one for a revolution of a. shaft, recording a machine operation.:— Though small, this counter is very durable; its mechanism will stand a very high rate of speed, making it especially suitable for light, fast-run- ning machines, most adaptable to experimental work. If run backward, the counter sub- tracts. Price, $2.00 (Cut nearly full size). The Set-Back Rotary Ratchet Coun- ter below is for larger machines, such as punch presses and metal-stamping machines, where a reciprocating movement indicates an operation. Registers one for each throw of the lever, and sets back to zero from any figure by turning knob once round. Supplied with from four to ten figure-wheels, as required. Price with four figures, as illustrated, $10.50. (Cut less than size.) There’s a Veeder for every purpose where you could pos- sibly use a counter. Write for the counter booklet. The Veeder Mfg. Co., 44 Sargeant St, Hartford, Conn. How to Change the LSeniids in Two Glasses HE illustration shows how to run i a full glass of port wine into a full glass of water without the aid of another receptacle, by the use of an ordinary post card. ; When you present this trick to your friends they will study it for a PORT WINE PORT WINE SETTLING ON SURFACE OF WATER PORT WINE RISING UP THROUGH WATER H SMALL OPENING LEFT” | BETWEEN GLASS AND CARD A very mystifying trick provided you can obtain the wine to do it with while, then tell you that such a thing | is impossible, but you inform them that nothing is impossible in these progressive times. The reason port wine is used is be- cause it will float on the surface of water more quickly than other spirits. Other wines will work but are..much slower in operation. Place a post card upon a full glass of wine, turn the glass upside- down quickly, holding the card firmly on top. Then place it carefully upon a full glass of water until both rims of the glasses are even and turn them over so the water is on top. Pull the card a little so that the wine will be able to flow upward in a thin stream to the bottom of the upper glass through the water. A small opening works best, and remember that the process is rather slow.—M. TOCABEN. Repairing a Gearcase Break with Babbitt AVING a break in the gearcase of my car recently, I did not care about paying a large repair bill for taking the en- gine down and having it welded, so I used the me- thod shown in the illustra- BABDBITT Here is a way to save | tion. money and keep away I poured from the repairman | molten bab- bitt into the part that was broken and, up to date, it has held together exactly as if they were welded. Perhaps some other reader of the POPULAR SCIENCE MONTHLY has the same trouble, so I hasten to pass the idea along.—J. W. MOORE. Hundreds of IDEAS For the Owner, Manu- facturer, Dealer, Mechanic in 1920 Motor Annual of the Popular Science Monthly The biggest book of its kind ever published—invaluable to every- one interested in Motor Vehicles and Accessories. It will accu- rately picture and describe more than 400 new devices and acces- sories ‘and give scores of prac- tical ideas to the Owner, Manu- | facturer, Dealer and Mechanic, The 1920 Motor Annual will be. edited by nationally known auto- ‘mobile authorities. It will cover all important new inventions and improvements to Cars, Trucks and Accessories. Matching the wonderful develop- ment of the automobile industry —(there are six and a half mil-f lion Motor Cars and Trucks reg: | istered in the United States) is the growth of the Motor Annual. ‘The 1920 edition i$ limited to 100,000 copies. Order now if you wish to make sure of getting a copy. Cut the Coupon and] Cut your Motor Costs Popular Science Monthly, 225 West 39th Street, New York. Please send me a copy of the 1920 MOTOR ANNUAL of Popular Science Monthly. I enclose 35cents. Send post- paid when issued, about Jan. Ist. | | | | | | | q | q — | | | | | of GW a
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Transforming the Turtle into an Ash-Tray and ornamental ash-trays can be made from the shells of box turtles. First, naturally, the The turtle’s back will take a high polish if carefully done turtle must be killed and thoroughly cleaned in boiling water or, if neces- sary, in a concentrated lye solution (caustic soda). This done, procure a roll of strip brass 14 in. wide and 1-32 in. thick. The brass may be worked into a number of designs with the ordinary house pliers, but care should be taken to make sure that the halves match perfectly. In order to do this properly it is best to draw the design first and then to work up the drawing, placing it upon the brass as the work progresses. The different parts of the design are held in place by U-shaped clips.—ERNEST BADE. How to Make a T-Square Stay Put NE of the troublesome things about the ordinary T-square is its aggravating habit of sliding off the drawing-board to the floor the instant it is left alone for a moment, especially if the board is inclined as it should be for comfortable work. A’ simple way to prevent this is to fasten a narrow strip of grooved wood along the edge of the drawing-board, as illustrated. Then insert a small brass screw on the under side of the T-square at the center or slightly be- BOARD ° ii The screw pre- T SQUARE the long ob of the from SCREW on) Sliding from UNDER SIDE. the drawing low it, and as near the working edge as possible. File off the head of the screw so that it will slide loosely in the groove. One screw is sufficient, as the tendency i is for the lower end of the stock to swing out because of the weight of the long arm of the T-square. The screw should be filed off at an angle so as to slide easily over the edge of the groove.—-MorrIs G. MILLER. Quality and care put into Hanes Underwear will astound any man! GUARANTEE—We guarantee Hanes Under- wear absolutely—every thread, stitch and ELASTIC nar button. We guarantee to return our money or give you a new garment if-any UNDERWEAR" OU’D rate Hanes winter Men’s Union Suits and Shirts and Drawers sensational value if you followed the bales of fine, long- staple cotton from the moment they entered the Hanes Plant until you saw Hanes Underwear packed into boxes for shipment all over the nation! Your confidence in Hanes would be as supreme as our own! What goes into Hanes in quality and workmanship comes out to you in extra+wear, extra-comfort, extra-warmth! We tell you frankly that Hanes is the biggest underwear value ever sold at any price. Prove our:statement for vour own satisfaction. If you prefer Shirts and Drawers, Hanes will meet your keenest desires! Read every detail and compare with the circles in the diagram figure above, because you should understand what Hanes hands you. Guaranteed unbreakable seams, with reinforcements at buttonholes and at every strain point; buttonholes last as long as the garment; elastic knit collarette that snugs up to the neck, preventing gaps; shane-holding elastic knit shoulders that “give and take’; durable, snug-fitting three-button sateen waist band; elastic knit wrists: pearl buttons sewed on to stay! Put behind that array of wear and comfort features Hanes perfect workmanship and Hanes quality! Hanes Union Suits have never been near-equaled at the price. They are the last word in comfort and the most unusual underwear value in America! These Union Suits have all the desirable features of Hanes Shirts and Drawers with a closed crotch that stays closed! Your confidence in ‘‘Hanes” can never be misplaced! Any Hanes garment will outlive our guarantee! ‘‘Hanes’* Union Suits for Boys are as distinct from all other boy’s underwear at the price as are our men’s garments. To mothers and fathers Hanes boys’ Union Suits are superb. Cozy, fleecy warmth and the finest workmanship, combined with the best features of Hanes Union Suits for men, put these boys’ suits in a class distinct from allothers. They certainly do stand the wear and wash! .See this Hanes Underwear at your dealer’s. If he cannot supply you, write us immediately. P. H. HANES KNITTING CO., Winston-Salem, N. C. New York Office, 366 Broadway Warning to the ia Te 5 garment offered as “‘Hanes” is a substitute unless it bears the Hanes label. | Trade mark | >. J on every | = | | | | | 4 | be |
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‘ MAIL Coupon for FREE Pamphiet President Wilson Fright ened the Lords at Midnight”, and a NEW FOLDER telling all about this wonderful writing machine that gives —- The POWERoF EMPHASTS po advertisers used Italics ome importan poinys in A rece repent issue of pening Post. $5000, po gat emphasized in I talics. given er use of tt a re vit in oven Mees ssage in the Many in One!” Over 365 Different Type-Sets, Including All Languages Any one of which may be substituted in a few seconds: “‘Just turn the Knob”’ Note the above samples of Multiplex type. This marvelous INSTANTLY inter-changeabl. feature is the only one of the many reasons wh: a. sands of prominent men and women in all walks of life Let us send the free Fold hich explain the the fultiplex. The will prove an education in wriling machines to you, we are glad to send them to any interested reader of this opt and mail to us now—before possibly forget. You incur no Fill out the turn this page Also—an Aluminum PORTABLE Model For traveling — for home. Weighs about 11)}bs. Full capacity. Ask for special folder. THE HAMMOND TYPEWRITER to, g East 69th Street New York City Make It Yourself The Amateur Craftsman: ‘1000 Things and How to Make Them.” This indispensable book for the handy man fully describes and illustrates how to make various useful things. You . will be amazed at the wonderful things you can make with a saw and a ham- mer, or with a drill and other simple tools. This book will add greatly to your pleasure if you like to make things. You can save many times the price of the book by making things you need about the home. 448 pages; size of page, 614 by 91% in.; more than 1000 illustrations. Price $3.00, postpaid. Will be published on or about Dec. 1, 1919. kk Dept. Popular Science Monthly, 225 W. 39th Street $5,000 in Scholarshing? Open to All Seniors in High Rdwcls and Preparatory Schools The Popular Science Monthly will award $5,000 in scholarships during this school year. There will be ten scholarships of $500 each. The Popular Science Monthly offers these scholar- ships for the purpose of encouraging pupils to keep abreast of the times by applying their class-room work to problems of the outside world. The Popular. Science Monthly believes that we are entering a marvelous period of development in which engineering will play an important part. The Technically Trained Man Is Bound to Win _ The young man who takes advantage of the opportunity to equip himself with a- technical education is bound to win a big place in the industrial world.. _ Lack of money now need not keep you from obtaining the coveted goal—a technical education. If you have ambition, the Popular Science Monthly will make it pos-. _ sible for you to attend any technical school or university that you may select. How to. Win a $500 Scholarship - These scholarships are open to all seniors in the high schools and private preparatory schools of the United States. If you want to win one of these $500 scholarships, see your principal or headmaster and ask him to send -in your name as a candidate. The basis of awarding these scholarships will be a competitive examination on the im- portant new scientific inventions and discoveries. For full particulars write to EDUCATIONAL DEPARTMENT POPULAR SCIENCE MONTHLY 225 West 39th Street, New York | | | ‘ | # | | — > — =~ qj — — | y
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200 YEARS OF & MUSICAL INSTRUMENT MAKING NEW plan. Wurlitzer, the largest general music house in the a world, is offering the finest musical. instruments with complete outfits at oe price. With each instrument comes a hand- some carrying case, all attachments and extra parts, music rack, in- j struction book and book of mutical selections. This new plan gives THE MOST POPULAR ‘4 ~ at a tremendous saving all the things that otherwise you would SAXOPHONE SOLOS ve to buy separately at regular prices. Complete Musical Outfits Sent Trial Any Wurlitzer Complete Musical Outfit will be sent for a full week’s free trial in your own home. Play the instrument as if it were your own. At the end of the week return the instrument and outfit at our j expense if you wish. Convenient Monthly Payments If you decide to keep the instrument, you may pay the direct-from- manufacturer price in small monthly sums. A few cents a day will make one of these beautiful instruments and outfits your own. These Complete Outfits are ready. Send for one on free trial. 7. Violin Mellophone Flute Mandolin Banjo-Ukelele Hawaiian Cornet Trap Drum Bugle Tenor Banjo Banjo Guitar Bic. Saxophone Clarionet Fife Banjo- Banjo-Guitar Viola hs Trombone Piccolo Guitar Mandolin Ukelele Cello Send for Catalog The instrument of your choice and everything in the complete outfit fully illustrated and described, with { full details of the free trial and easy payment plan. Weare manufacturers of all musical instruments. This wonderful catalog is a veritable musical encyclopedia. We will send it to you free and without obligation. Mention the musical instrument in which you are interested. Mail the coupon now. ° The Rudolph Wurlitzer Co., Dept. 1208 ; 117 E. 4th St., Cincinnati, O.—329 S. Wabash Ave., Chicago, Ill. a The Rudolph Wurlitzer Co., Dept. 1208, 117 E. 4th St., Cincinnati, O.—329 S. Wabash Ave., Chicago, Ill. Send me 7 new catalog with illustrations in color and full description of the Wurlitzer Complete Outfits and details of the free trial and easy payment offer. Wurlitzer Saxophone Outfit Wurlitzer Violin Outfit (Musical instrument in which Iam especially interested ) ‘ v i ac \ 2 1 49 . fe
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restige pays—a # sparkling, genuine stone always lends X it. There's no reason why you shouldn't wear one, and: choose handsome high-grade Xmas gifts from our stock, even if you haven't the cash to pay for them outright. We trust you, and invite you to OPEN A CHARGE ACCOUNT and Pay as You Like, ‘Weekly or Monthly. : Our prices are’ rock-bottom; they can’t be beat. We buy in the world s greatest Diamond Markets. You pay ONE profit only; you see the goods before paying a cent. Return _ them at our expense if they are not a bargain—or buy and pay monthly or weekly, as you prefer. Liberty Bonds accepted. ‘ like an of these: 1124—7-Stone Cluster Diamond Riog. $6S. 4407—14K. Green Gold Pierced Mounting, fine Diamcnd, $55. £393—Heavy Signet Ring. 14K. Solid Gold, $19. 2212—Thinhnest Opera Watch, Elgin, $29. 1759—Solid Gold Cameo Brooch, $12. 1540—14K Solid Gold Bar Pio. Aquamarine Center Pearl Set, $23.S0- epee Sotid Gold Cameo Lavaliiere, $22. '34—Diamond Scarf Pin, Solid Gold, $28. Initial Ring, Fine Diamond, $40. Send for Our FREE CATALOG Post yourself on Diamonds,.Watches and Jewelry. Only the choicest’ finds a place in the ROYAL Catalog. You will learn more from it than from a week in any re- tailstore. Any article you want to see sent postpaid for free examination. No obligation whatever on your part. “If It’s a ROYAL It’s a GEM” Nowhere in. the world will you find more superb Diamonds; hand- wa somer, better wearing Watches, M or more beautiful Jewelry. Every NB article of supreme quality, up- to-the-minute style, wonder- ful workmanship and abso- lutely guaranteed. Even if you don’t want to buy now, write for TODAY. Ask for edition 83. DIAMOND & WATCH CO. (ESTABLISHED 1895) 35 Maiden Lane- v York Improvising an Emergency Stencil-Brush. 8 ele a lot of stenciling to do and being without a brush of any sort, I made the rather primitive one shown gin the illustration in the following manner: First, I took the wooden handle from one of those wire carryalls, that the Making this brush takes less time than running out to buy a new one big stores furnish gratis to their cus- tomers for carrying heavy parcels. Then I ran three strands of heavy twine through the hole in the handle, frayed it at one end, bound it tightly PACKAGE HANDLE A cutaway view of the stencil brush showing how it is made ‘at that end with additional twine, and knotted it at the other end. Thus I became the owner -of a very unique but practical stencil brush.— GEORGE G. HANSON., Make These Scales and ‘Save Fifty Dollars ABORATORY scales are so ex- pensive that the averagé student of chemistry would rather go without one than spend fifty dollars or more for an accurate chemical balance that he will seldom use. But it is not at all difficult to construct an accurate scale sensitive either to one grain or one centigram. Although this seems an impossibility when judged by some of the balances offered for sale. Still, what are the difficulties in the con- struction of a beam baiance? None. All that is necessary is a knife-edged fulcrum, upon which the beam of the balance can be laid. The principle of levers is the fundamental law upon which all balances are based. Save over half the -regular cost. Enjoy your ownhan- diwork. You can make af splendid talk- ing machine that plays all records. Blueprints with full instructions. Extra-Special introductory offer. Double spring motor, 12” turntable, tonearm reproduces all records, and all other necessary parts, together with three $ 85 10” doubje-faced records furnished complete for Write for catalogue. Send 25¢ for blueprints only, | PROTECTO EXPLOSION AUTOMOBILE WHISTLE A pleasant, distinctive wa: signal—more ective then a horn. THIS TYPE OF SIG. NAL USED ON U.S. MAIL TRUCKS AND... AUTOMQ. BILES. Self installed in two’ minutes onany machine or motorcycle, wrench only tool required. Cannot of order-—N $950 ING. Money back guarantee. complete. . Order Marvel Contain Windows Bevel plate glass, nickel trimme High Qual- ity. Insert them yourself in back \ or side curtains in two skill or spe. the appearance wonderfully. BY Various sizes shapes Vh shown in catalogue. Price Ee 00 Complete set of 3 lights for 1917 -18-19-20 Fords. THE MARVEL CO. DEALERS, Agents, 333 $. Dearborn St, | Garagemen, ivrite now Dept. P2S, Chicago, Ill. We want every man. who shaves to write us for articulars about the Vibrating Electric Razor. No matter where you live, in the city or on ‘the farm, the Electric Safety Razor will solve your shaving troubles. © » VIBRATING ELECTRIC RAZOR CO. Dept. 137, Omaha, Nebr. “DON'T SHOUT” } hear you. I can hear now as well as anybody ‘How?’ With THE MORLEY I’ve a pair in my pin now. but they are I would not know I had them in, myself, only that I hear all right. “The Morley Phone for the. DEAF is to the ears what glasses - are tothe eyes. Invisible, comfortable, weightless and harmless. Anyone can adjust it.” Over one Teendvoll” thousandisold. Write for booklet and testimonials. THE MORLEY CO.., Dept. 797, Perry Bldg., Phila.’ Fine BOOK FREE Yes, absolutely Free. Tells all about ‘axidermy and how we teach this fasci- bow for book. worthwestern School of Taxidermy 9208 Box Guliding Qmaha Nebraska , nating and lucrative profession by mait, | 1 LEARN BY MAIL TO and animals,tan hides.make rugs.etc. Dee-' orateyour home with beautiful specimens. a OWN A | | YOU LIKE : q 4 q — a | — — |
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On i neat box is obtained, in which pve of the scale will later be placed. These parts consists of a ful- crum, a beam, a pendulum, two pans, and the weights. The fulcrum, an old The scales utilizes its own box as a base and is surprisingly accurate razor blade, is attached to the lid of the box. The beam is any odd length of glass tubing with a file scratch in the. exact center and a small wire hook at each extremity. Upon these hooks the pans are later placed. The pans are made from any piece of thin tin. To each is attached a long piece of wire, “erminating.in an eyelet. The pendulum, which is V-shaped, has the two upper arms fastened to the beam in, such a manner that the lower free end, which must terminate in a point, is just-below the file scratch. No definite measurements need be given, as this beam balance can be made in any dimensions to fit the box selected. The beam .should be at least 10 in. long, longer if possible, in order to obtain greater sensitiveness. If the beam is 10 in. long the pendu- lum must be at least the same length. If the beam is shorter the pendulum The scale fits compactly into the box but is easily set up’ when needed must be made proportionally longer as the Iength of the pendulum either accentuates or decreases the sensitive- ness of the scale. A short beam witha long pendulum is just as sensitive as a balance having a long beam and a short pendulum.—E. B. BADE. -Tool:Making, Tool Design, Die Making and Metal ‘Stamping, Foundry Work, Forging, Pattern Making, HEskilled mechanic today isaspecialist. Hehasnoopportunity to build a complete machine or even a small part of one. His_ active work is carried along rather limited lines. But to make the best success in his work—to secure promotion to more responsible duties or to go into business for himself—it is absolutely necessary that he have a broad and comprehensive knowledge of machine work and shop. practice. There is only one really feasible way for the me- chanic to familiarize himself = with other shop lines outside his own individual work— and that is to have spe- cialists in all lines give him all they have learned in a from that will be’ readily | accessible. There you have the reason for the famous standard reference work, called ““Modern Shop Practice.” and 5 inches wide. The milling “Modern Shop Practice” is a wonderful reference } inches and a width of 2 inches. How long will ‘work in Machine Shop Practice and Management, | fect ® Production, Manufacturing, Metallurgy, Welding, purpose "is a magnetic How many processes for cutting gear teeth? do you Bei wo gears, when. the numbers o Mechanical Drawing, etc. It has been tested through | ‘qhareeivent ie S88 six editions, bought by thousands of mechanics, con yt $e sulting engineers, shop superin- | treads per inch? What determines the cutting speed tendents and owners, production in a milling machine? Give a short description of the thermit-welding process. 4 _ What is essentially the first step in’ making any tool from e& tool- maker's standpoint? » | Why is it advisable to cut the |.’ threads of an adjustable tap some- A Few of the Subjects Treated managers, etc. Machine Shop Prac- Machine Shop Man- New Edition Production Manu- what small th i facturing Only 7 Cents a Day | Metallurgy Under what circumstances would Welding Six magnificent volumes, flexibly bound you consider it advisable to use in American Morocco, gold stamped, 2,300 When enlarging hele? Why? Die Making | pages. 2,500 illustrations. Photographs. Why should undue accuracy never drawings, explanatory diagrams, tables, etc. | jigs and similar toast Forging Here you have at your finger tips up tc date | ., What is the practical way to test the t f moldi id? Pattornmaking aw. | labor-saving methods that big manufactur- _ How does the riser on a steel casts ing, etc. ers have spent thousands of dollars to ~~ from one pee develop. Facts that you can use in your | necessary in pouring a ———— , everyday work. Information that fits you | to cbtain the best resulte? to earn bigger pay. All this is now yours in the new 6 volume | yond chon niet Of deep mold- set of “‘Modern Shop Practice,” on payments so easy as to usr hat point carbon steel should be average only 50 cents a ‘week or only 7 cents a day! waaiewiuet _ Why is it necessary to reheat large Dieces after they have been hardened? SHIPPED FREE What must be the outside diameter No money in advance. Nota cent. See the books in your | the diameter of Se Sakae Pulley own home or shop absolutely free at our risk. Read them, face 9 inches?” examine them, study them for 7 whole days before you need decide whether you want to keep them or not. Send no money ; to get the books for free examination. Make no deposit. Assume no obligation. Simply sign and mail the coupon herewith and the books will be promptly shipped to you for 7 days’ free examination. If you are not more than delighted with the books and do not con- sider them a wonderful investment, just send them back to us, and you won’t owe us a cent. If you prize the books and consider them worth many times their price to you, send anly $2 within 7 days and then $2 a month until the special introductory price of $19.80 has been paid Send No Money Merely sign and mail the coupon and the books will be shipped to you at our risk, Get the coupon in the mail at once before this special offer is withdrawn. Send it today—-NOW AMERICAN TECHNICAL SOCIETY Dept. M-208, Chicago, III. American Technical Society Extra Fe ature FR EE! | Dept. M208, Chicago, U. 8. A, h d 1 Please send_me set of Shop for seven days ree t i To those who order prompt buy Twill rend $2:00) within seven dave and’ the, ot will give free a consulting member- | receipt showing that the $30.00 set Shocks and$12-00 consulting ship in the American Technical Society | without the books after the tridl for one year. This gives you the right to ; a ask our experts any question regarding | Nsme.------- shop practice for an entire year. You | § Address.. may ask as many questions as you please. | I - ; { A surface of cast iron is to be : : finished in one cut on a milling ma- pat chine. The casting is 8 inches lon — la. : # 4 | : |
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ip Sometimes, in the night, Pain comes to your house. Then.is the time, most of all, when you rely on good old Musterole. No fuss, no bother,no worry—no mess- ing about. with plasters or waiting for water to heat. Quickly you go tothe Musterole jar. A bit of that clean white oint- ment on little Bobbie’s chest, and lightly yourubit in. A gentle tin- ‘gle of skin puts Doctor. Nature to work, and socn a healing warmth reaches the conges ted spot.. Then comes a soothing coolness, Bobbie drowses off to sleep. For co congestions, bron- chitis Musterole is uncommonly effective. It is good, too,todrive away the pains of rheu- matism, lumbago and neuralgia. Musterole relieves — without discomfort. It is better than a mustard plaster, with all the virtues of the: old-time plaster but none of its disadvantages, Musterole does not blister. And itis easy to apply. Just rubit on. Rub it on—for little Bobbie’s cold —for Sister’s bronchitis—for. Grandma’s pains in chest or back. It’s an old-fashioned remedy in a ‘new-fashioned form, Keep a jar handy. Many doctors and nurses recommend Musterole.. and 60¢ jars. $2.50 hospital size. The Musterole Co., Cleveland, Ohio BETTER THAN A MUSTARD PLASTER AN EASY WAY TO MAKE MONEY -=:: small sal Be independent. Go in Pe: aot = Bairing Ses wan says" made $60.00 the first n en’ very motorist a custo: No e n avy. Send fo’ } descriptive... Mention what instru- ail
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shown, with holes drilled an inch apart in the bottom of the pipe. i The burner was put in place, held about half an inch above the asbestos grate by iron clips, and connected to a supply line, which led to a tank: In the line, at Some convenient place, a small yalve, not unlike that of an ordinary oil stove, was placed to regulate the amount of oil. To start the fire, the valve is opened, allowing a small amount of oil.to drip on to the asbestos., It is then shut off, and the oil ignited with a match. The heat-soon vaporizes the oil, and it flows out of the holes and into. the. asbestos, which.causes the flame to spread. over the whole bottom of the stove.. ‘The numerous holes provide a good-air supply. The stove in question was used to heat the office of the garage, and was practically no expense at all. The sze of flame was regulated with the valve.—DALE VAN HORN. An Old Bottle Made into an Acetylene Lamp N acetylene lamp for use in the laboratory or shop-may be made as follows: Obtain a large-mouthed bottle of one or two quarts capacity, a large TOP VIEW Or WIRE SUPPORT ACETYLENE BURNER RUBBER CONNECTION GLASS TUBING RUBBER STOPPER WIRE SUPPORT CALCIUM CARBIDE }— WIRE GAUZE Here’s a way to construct an emergency light that does away with dangerous oil lamps lamp chimney, a small disk of coarse wire gauze, a one-holed rubber stop- per, a 6-in. piece of glass tubing, a rubber connection, an acetylene gas tip; and 18 in. of aluminum or other heavy wire. Put the apparatus to- gether as shown in the diagram. Fill the lamp chimney two thirds full of lumps of calcium carbide ‘and pour water in the bottle. Open the Pinch-cock and the. water will rise through the disk, and, coming in con- tact with the carbide, will generate acetylene, which, after waiting a few moments to. completely expel the air, for safety’s sake, may be lighted at the burner.—FLoyD L. DARROW., ““THE SHOE THAT HOLDS ITS €#SHAPE” $520 3G 00 $720 $900 & 3190 You .can save money by wearing W. L. Douglas shoes, the best known shoes in.the world. Sold by 106 W. L. Douglas own stores and over 9000 shoe dealers. W.L. Douglas name and the retail price stamped on the bottom guarantees the best shoes in. style, comfort and..service that can be produced for. the price. Bowlegged Men| lil Your Legs will appear Straight if you wear The stamped price is W. L, Douglas personal guarantee that the shoes are always worth the price paid for them. The prices are the same everywhere — they cost no more in San Fran- ‘cisco than they do in New York. W.L. Douglas shoes are sold through ourown stores direct to the wearer at one profit. All middlemen’s and manufacturing profits are eliminated. By this method of marketing our shoes, W. L. Douglas gives the wearer shoes at the lowest possible cost. W.L.Douglas $7.00 and $8.00 shoes are abso- lutely the best shoe values for the money in this country. They are the leaders everywhere. W. L. Douglas $9.00 and $10.00 shoes are made throughout of the finest leather. the market affords, with a style.endorsed by the. leaders of America’s fashion. centers; they. combine quality, style and comfort equal to other makes selling at higher prices. W. L. Douglas shoes are made by the highest paid, skilled shoemakers, under the direction and supers vision of experienced men, all working with an hone- ‘CAUTION Insist upon hav- ing W. L. Douglas shoes with hisname and price stamped on the bottom. If W.L. Douglas shoes cannot be obtained in your vicinity, order direct. from factory by mail, Parcel Post charges prepaid. Write for Illustrated Catalog showing how, to order by mail. Hilo est determination to make the best shoes for the. price that money can buy. BROCKTON, MASS. e Straightleg Garters . Combination hose supporter and pantleg § straightener-quickly adjusted to fit vari- j ous degrees of bowlegs; as easy to put on and to wear as any ordinary garter—no harness 01 padded forms; just aningenious special ‘garter—improves appearance ‘won- derfully. Wearers enthusiastic. You will be,.too. Write for free booklet, mailed in plain envelope. IAGENTS Gold and Silver Sign Letters: For store fronts, office windowe and glass sign of allkinds. No experience necessary Any: one can put them on and make money rgb? from the start. $30.00 to $100.00 a Week! You can sell to nearby trade or travel all oves the country. There is.» big demand for win- dow lettering inevery town Send for Freé Samples and full particulars. Liberal Offer to General Agents, yp S-L Garter Co., 741 Trust Co. Bldg., Dayton, O. METALLIC LETTER CO., 433A N. Clark St.. Chicago Send for a Compl-te Catalogue of Jewelry and Goods a REDDING & co. Ae doz.. Over Publishers and Manufacturers MASONIC BOOKS || CLUB AND NUMBER IN CLASS, Either pin illustrated made with any equal ~ amount of lettering, one or two colors enamel. Silver plate, 25¢ ea., $2.50 doz. Sterling silver, 50% ea., $5.00 attractive designs in our 1920 catalog. Write today for free copy. > : High grade Solid gold Pins and Rings. 200 Fifth Avenue Dept.S New York BASTIAN BROS. CO. 169 Bastian Bldq., Rochester, N. To} ox | 20 $4.00$4.50$5.00 | WATER | q “The NGHTwear of a Nation!” Zz _ .
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Learn Drafting Employers everywhere. are looking for skilled draftsmen. They are offering good salaries to start with splendid chance for advancement. Drafting offers exceptional opportu- nities to a young man because drafting itself not only commands goo~. pay, but it is the first step toward success in Mechanical or Structural Engineering or Architecture. And drafting is just the kind of work a boy likes to do. There is an easy delightful way in which you can learn right at home in spare time. For 28 years the Inter- national Correspondence Schools have been giving boys just the training they need for success in Drafting and more than’200 other subjects. Thousands of boys have stepped into good positions through I. C. S. help, but never were ‘opportunities so great as now. Let the I. C. S. help you. Choose the work you like best in the coupon, then mark and mail it. This doesn’t obligate you in the least and will bring you information that may start you on a successful career. ‘This is your chance. Don’t let it slip by. Mark and mail ‘this coupon now. INTERNATIONAL ARESPONDENCE SCHOOLS Explain, ou ting me, how for the Position, or in the subject, before which I mark X. MECHANICAL DRAFTING GALESMANSHIP STRUCTURAL DRAFTING ADVERTISING SHIP DRAFTING Show Card Writer * ELECTRICAL DRAFTING Sign Painter AROHITEOTURAL DRAFTING ILLUSTRATING SHEET METAL DRAFTING Cartooning BOILERMAKER DRAFTING BOOKKEEPER BRIDGE. DRAFTING Stenographer and Typist MACHINE DESIGN Cert. Public Accountent ELEOTRIOAL ENGINEER TRAFFIO MANAGER Electric Lighting and Railway Accountan Electric Wiring GOOD ENGLISH Telegraph Engineer Teacher Telephone Work Common School Subjects MEOHANTOAL ENGINEER atics Machine 4 OIVIL SERVICE Gas perating Railway Mail Clerk Surveying and Mapping Auto Repairing STATIONARY ENGINEER PLUMBING AND HEATING Marine Engineer Textile Overseer or Supt. ARCHITECT CHEMIST Contractor and Builder Navigation Spanish Concrete Builder AGRIOULTURE](_) French Poultry Raising{|_ Italian Name Present Street and No City. State. may send this coupon to International Corres; treal, Canada Locating the Light Switch - in a Dark Room O has not poked about in the dark, vainly trying to locate an elusive electric light switch? One person did who decided to end that gentle and joyous proceeding forever. He removed the mother-of-pearl cen- ter-piece from the “‘on”’ button’ Yr 2nd put in some radium paint. Then e cutout a circle of thick mica to fit the hole and pressed Now the switch glimmers it firmly.into atyoufromthedarkroom place. Now he can see the switch from the other end of the dark. | room. This is especially appropriate for switches in unhandy places, and forthe use of those who only occasionally use the light, preventing familiarity with the surroundings.—DALE.VAN Horn. A Safety First Belt Shift for a Grinder AFETY first is one of. the chief ing plants. As one result of such a campaign a prominent manufacturer had the combination -belt shift and safety guard, combined with a warning sign, installed over all. his. grinders. The result has been much greater care by the Operators and a consequent in- crease in efficiency. The belting from each grinder was boxed in, as indicated in the illustra- tion. Across the face of the-box, in front of the belt, was cut an opening, the width of the boxing, and about 6 in. high. A square sign bearing the words “For Safety’s Sake Wear Goggles While Using Grinder’? was pivoted with a No more minute particles of metal in your eyes if you adopt this device screw to the front of the box. A box for the goggles was fastened to the bottom of the sign. The bottom of the sign was extended to a narrow handle which lapped over the opening in the boxing séveral inches. In the upper end of the handle was inserted a round wooden Send for Catalog A-29 It is pocket size, 8x44 and contains 264 pages with over 1,100 illustrations, describing in plain, clear language all about Bells, Push Buttons, Batteries, Telephone and Telegraph Material, Electric Toys, Burglar and __ Fire Alarm Contrivances. Elec- tric Call Bells, Medical Batteries, Electrically Heated "Apparatus, Bat- tery Connectors, Switches, Battery Gauges. Wireless Telegraph instruments, Ignition Supplies, etc, Send for a copy now. Manhattan Electrical Supply Company, Inc. New York, 17 Park Place St. Louis, 1106 Pine st, Chicago, 114 So. Wells St. San Francisco, 604 Mission st. if Car slogans nowadays in manufactur- | An Extra Lamp Where You Want It ‘Iwo uses fromone socket! Extra light or light and appliance from Big Profits i in Vuleanizing We manufacture tne An- derson Vulcanizers and teach you the Famous An- derson Method of Vulcan- izing in five to ten days in be tate School nearest their Method of doing thes work; then visit our Anderson school course of the And ‘od and you will know why our ual e good, e willbe aid $2 r day ext ecaute we se the Andersen. Steam Vulcanizer Co. 3 Williams Bidg. Indianapolis, ind. $. print rint your name. We receive many we cannot m ADE This Car. This nifty little car motor, can be built by y boy Parts are * tarnished by us this Car Get 1920 plans, ready \ SYPHER MFG. CO. . now OHIO SusMit YOUR Sons ON ANY FOR OUR ADVICE. WE REVISE POEMS,COMPOSE MUSIC OF ANY DESCRIP- FR “TIONSECURE COPYRIGHT AND EMPLOY ORIGINAL METHODS FOR FACILITATING FREE PUBLICA VALUABLE INSTRUC TION OR OUTRIGHT SALE OF SONGS TIONS TO BEGINNERSAND TELLS UNDER THIS SUCCESSFUL q HHE TRUTH CONCERNING EVERY BRANCH CONCERNS GUARANTEE OFTHIS ESSENTIAL AND FACINATING PROFESS ION.THE GREAT WORK ACCOMPLISHED BY THE POF ULAR SONG IN WINNING THE WAR IS ONLY AN INDEX TO THE ruti | 4 | ~ | al At Your Dester’s | pry NK \ MEG; CO. WN t ~ | 2 — Bj to you, and guarante course costs you $20, and any as ; ~ il ons ALL MONTH 4 or any watch you want, send for FOR | A up-to-date designs. Buy the Ware LFRED WARE CO., Dept. a | im WIDER SCOPE AND GREATER OPPORTUNITIES AFFORDED BY PEAL —
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which was sprung into holes near each side of the opening by the aid of a spiral spring as shown. This served to hold the lever in the proper position to engage and - disengage either the tight or loose pulley of the grinder. The belt shift iron was U-shaped and was bolted to the back of the handle. near the center of the opening. A peg near the bottom of the handle served’ as a convenient secondary handle to the lever.—L. B. ROBBINS. Keeping the Houn’-Dawg Out of the Garbage Pail OW many times have you gone out into.the yard to. find your garbage pail upset ‘and four or five | dogs streaking off with their tails between their legs. at. your angry. shouts? More times than you care to mention, = we'll warrant. tom While there are many types mm of garbage cans im) | upon the market. designed to pre- | vent them being . overturned— some made to be buried and others so heavy over nor its lid re- moved accidentally that they cannot be upset—they are all rather expensive. If posts are erected against an ordinary can and a piece of wood stuck through the can’s handle, as illustrated, you -will’ never more be troubled by the can ‘being over- turned.— HENRI G. DEKRUIF. How to Take the Dents Out of Mudguards URING my experience me- chanic in the automobile business, I have found that.to remove dents in PAINTED A decidedly novel way to eliminate dents and restore the original luster of the enamel fenders and mudguards is a rather difficult job. .To try and hammer them ‘out, flat, will only buckle the dent from one side to the other. .A better method is to saw the dent or protruding portion into an X-shape (see illustration). The saw-cuts will | relieve the strain and the dent can then be hammered out. The saw-cuts are hammered out flat, soldered up, the solder being scraped flush. When the section is repainted one can- not tell where the dent formerly Was.— WILLIAM FARREL. PA TAL ALIA WAL j, WALL VAS UAL want ' + Ma ALY =~ = == ° == ) sir, the same old reliable Sloan’s— the most popular Liniment on the market!” LOAN’S LINIMENT Lumbago, Sore Muscles, | s= marks the survival of Stiff Joints, Neuralgic Head- Be the fittest. For thirty-eight ache. Penetrates without 2 ee years its sales and its pres- rubbing to the afflicted part, Ka == tige have steadily grown, quickly promoting a warm = AS until today, to speak of tingle of comforting relief. s= == any external ache or pain Willnot stain theskin,takes ze = is synonymous with saying little to produce gratifying <= =e: “Sloan’s Liniment.” results. == It is unequaled in prompt- Keep a bottle handy for em- as ly relieving Rheumatic Twinges,Neuralgia,Sciatica All Druggists, 35c,:70c, $1.40. = = Makes its own gas from Kerosene (coal oil). Gives every home a gas stove. Absolutely safe. ay 4 Wonderful Labor Saver Agent a — about it. No coal or ashes to cts. Ne more gasoline. Safe,Clean, Odorless, Cheap de home a prospect. Low price makes quick sales. Easy to carry and demonstrate. Big profits. Your territory is open. & Write, today. THOMAS BURNER CO., 3647 GAY ST., DAYTON, OHIO Health? Physicians are abandoning ‘ for Cl this new treatment. If your mind or , body is tired, or you have rheumat- ism, blood, stomach, liver, kidney and skin troubles, open your pores, and feel the id cha: in your condition, at cost of 2ca bath. The Robinson Bath Cabinet is the only scientifically con- structed bath cabinet ever made for ome FREE —*‘The Philosophy of Heal a Beau rite tod: Age Take Turkish Bath at Home | 10 Cents a Day Pays for This Symphonola Plays all records, Victor, Columbia, Edivon, Pathe, Little Wonder, Emerson a year ‘to pay, after 30 days’ trial. Compare its ails to make good. Ask today for the — Beautifully Illustrated Symphonola Book FREE Sym pho ‘ol Re cords o styles sold on easy payments, ym onola ecoras Get our list of the latest song, nce, pepuler. gleer sounding, full toned disc records. Playable on any Coe SPSM 1119, Buffalo, N. Y, Washington, the home of the Pathfinder, } ™* your means, Ifyou want a paperin home which is sincere, 15 does not repay us; we are matter of 2S¢ in stamps or coin will bring you the — on is an ill d weekly, pub like sitting jon's center, for the Nation; a paper that prints all the news of the world an et in tells the truth and only the truth; now in its 27th year, This paper fills the bill without emptying the purse; it costs but $1 a year. If you want to keep posted on what is going on in the world, at the leastexpense of time or money, this is ing clearly, fairly, briefly—he: Path finder d at the Nich reliable, wh the Path itis. Send to show that might lik fricuds, Pathiinder, Box 23, is yours. If you ha Fron, : i } hy : ¢ tY, Free Sample | ‘SAW CUTS SOLDERED to Workers 2 FLUSH | 1018 N. we HIO ay as become the World’s Ing the Pathfinder will be ee the inner council with those = the world’s destiny for then
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i ‘Stronger, Clearer Voice for YOU! Weakness, huskiness and harshness banished. Your voice given a wonderrul strength, a wider range, an amazing clear- ess. This is done by the Feuchtinger leading European the tones. . Send for the facts and I u have any voice impediment thi: is method need not stammer Mail coupon for free book.” * Perfect, Voice Institute 1772 Wilson Ave. Studio 1208 Chicago, tll. ORE Finger Print Experts are. needed. Men.who.ate masters this profession arescarce. The demand for Finger Print Experts is great. Asa special inducement we will give you free of charge our new easy reading course in Secret Service Intelli- gence if you act at once. Be.a Finger Print Expert Build up a business. on the basis of a trained brain. ‘You can do it as a master of the Finger Print profession. ‘There is crying need for Finger Print Experts. Tight now and the. demand for these trained men is growing-every day. A profession that offers wonderful oppor- tunities for advancement. Governments, corporations, police departments, insti- - tutions and individuals have constant use for these specially trained men: The work is fascinating and : The Pay Is Big ! ’ No special education is necessary. You - can become a master of this profession by studying at home in your spare time. Expert Finger Print men travel. all over the country solving mysteries that. baffle all others. They are important men and highly regarded and envied by every one. . Mail the Coupon Get full information about this great pro- fession and our big offer of a free course in Secret Service Intelligence. The mas- tery of these two closely allied professions places a brilliant career within your grasp. Achievements that will immediately place the stamp of success upon you, are now possible. Send this coupon for full in- formation NOW. University of Applied Science ‘Desk 1208, 1772 Wilson Ave., Chicago ‘Gentlemen: Without any obligations whatever, send me your new FREE book on Finger Prints and your offer of a free course in Secret Service Intelligence. Ride Around in a Chariot While You Scrub HE irksome job of mopping or scrubbing flocrs may be made less of a drudgery by converting a soap-box into a padded frame placed on rollers, whereby the housewife Floor scrubbing-is hard at best but the chariot helps.lessen exertion -may roll herself about the house to do the floor cleaning. | One side of the box is removed, and the remaining sides are trimmed down to.about 5 inches. Burlap padding will provide easy knee cushions. The de- vice is placed upon four rollers, the. elevation of the chariot from the floor being the height of the rollers. A dish may be attached to one side for holding soap, while another rack may be provided for carrying the scrub- bing-brush.—S. R. WINTERS. Change Your Old Bottles into Drinking Glasses ROCURE a bottle—any kind will ‘do ‘that has a flat bottom—and tie a string around it, about halfway up the side, that has been soaked in kerosene or turpentine. Then set the string afire. After the ‘string has nearly burnt itself out, dip the bottle in ice-cold water, and a A variety of useful and ornamental glass can be made in the manner. shown above clean break at the point where the string was tied will result. The sharp edges can be readily rounded off with a file—DvUARD SCOTT. In This Interesting Contest THE BOY who can think of the most inter- esting uses for the popular AUTO-WHEEL COASTER for earning money and for play, we shall aw one of our large models absolutely FREE. It’s a mighty generous prize for a few minutes’ work, And the following eleven valuable prizes will be given to those sending in the next best uses: Camera, Camping Tent, Mess Kit, Scout Knife, Fleetwing Steering Sied, Compass, ingersoli Watch, Axe, Bank, Electric Flashlight, Poncho, INFORMATION ABOUT CONTEST 1. Any boy or girl not over 15 years may compete, 2. Contest will be judged by three men well- known in the Boy Scout organization. 8. Write to Business Idea Dept., Buffalo Sled Co. for pamphlet explainin, he Contest, and colored catalog telling all about Auto-Wheel, 4. Atend of letter write names of three Coaster agon Dealers in your town. If any carry the Auto-Wheel put an ‘‘x’’ after name. YOU CAN DO IT. Any live boy who knows how to get fun and earn money out of a good, strong ccaster wagon, has a fine chance to get the Auto- Wheel as a prize. Here are a few pointers: The Auto-Wheel is a wagon for work or play. It’s built for strength and speed Has roller bearings, steel axles and tires, body white ash, maple gear. If there’s an Auto-Wheel dealer near you, he'll gladiy let yon see the Auto-Wheel Coaster in his store, and he’ll give rs some good ideas for your letter. CONTEST CLOSES NOVEMBER 30, 1919. HERE’S- YOUR CHANCE. GET BUSY. Buffalo Sled Co., 157 Schenck Street, Tonawanda, N, PUT A if SILENCER ON YOUR RIFLE And get no end of FUN. It FREE reduces noise, reduces re- — coil and steadies your aim. fog it MAXIM SILENCER Co. / 91 Homestead Avenue, Hartford, Conn. Don’t Grope for Words a few minutes daily with Gren- - ville Kleiser’s Mail Course in! Practical English and Mental Efficiency. It will quickly; teach youhowto Use Good English—and Win Enlarge Your Stock of Words—Use the Right Word in the Right Place—Win Promotion— Write Compelling Busi: Correspond: Stories, Advertisements, Sp h B an Engaging C. ti t, etc. Write for interesting Booklet ‘* How To Become a Master of English ;” mailed free. No agerits will call on you. FUNK & WAGNALLS COMPANY, Dept.331 New York, N.Y. BUCHSTEIN’S FIBRE LIMB soothing to your stump,— strong, cool, neat, light. . Easy payments, Braces for all, Guaranteed 5 Years deform-; Send for Catalog Today ities. P. BUCHSTEIN CO., 113 6th St. $., MINNEAPOLIS, MINN. POPULAR SCIENCE MONTHLY makes the, Industrial Progress of the world crystal-clear to you. $2.00 will bring this surprising magazine to your; home each month for a whole year. .acommand of English! Spend; — , Boys/ efiuto-Wheel | bay musiciais, actors aud speakers. Use it in your own home. Simple, silent exercises a taken a few minutes dail. impart vigor to | Do You Stammer? : Send the coupon and get our free book and litera- 6. { er j : ture. We tell you just what this method is, 4 os how it is used and what it will do for you. No: matter how hopeless you’ case may seem the Feuchtinger method will improve your voice 800 per cent. { ' tp No obligation. on you if you ask Tor this information. We ZA J Ye \ ~<a Lug : gladly send it free, postage prepaid. Just mail the coupon. 2— 2 | — | P\\ Z Var =| Secret Service / Dervice | i K VAY... DS | Oy JOIN JUNIOR RIFLE CORPS: — - We areall trying toSELL something — —it may be brains, or automo- ‘ — biles,or soap—but words are the universal medium of ECTLY— ‘ITA . Get; ik \ ergs / = a = 3 : a
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Mend Thag™ Head ‘TOW oft screwo using come you nearly jf Did you consider tha cheapest. quickest re in either stance, could b made with ce- ment? Such a satisfactory. : Simply fill tend yous’ around the joint never be bothered w th and allow’ it to loose handles again harden. You _ will never have any more trouble. There are other cement repairs ‘that will suggest themselves.—J. W. MOORE. Turnbuckles for Use on Model Airplanes UILDERS of model airplanes gen- erally encounter difficulties when they reach the construction of very small turnbuckles, as it is often im- possible to obtain small left-hand taps and dies. Turnbuckles are the most essential parts of a working model and here is a way out of the difficulty. Take some brass rod or heavy tubing and cut to lengths, as shown in Fig. 1, also some tubing large enough to slip tightly over-these pieces (Fig. 2). If the correct: internal diameter tubing Builders of model airplanes will be. glad to know how to make this device cannot be found, the next smaiiler size may be used and drilled out after it has been sawed into short lengths. Drilling a tightening hole in the center and rounding the corners finishes these |. pieces, which are to form the center sections of the completed turnbuckles. Two of the longer pieces, shown in Fig. 1, are required. If solid brass tod is used, these are drilled and one is tapped with an ordinary right-hand jeweler’s or very small machine-screw - tap, the-other piece being drilled only. If the ends of the turnbuckles are to be tapered as shown in the diagram at Fig. 5, they may be chucked by one end in the lathe while tapering. The eyes, shown in Figs. 3 and 4, are now made. Brass spring wire may be used. One has an eye formed.and is threaded.~ Before forming the eye in the other, push it through the piece shown in Fig. 1 and upset the end so ‘that it cannot pull out, yet may turn | easily.—H. H. PARKER. - Motorcyclist or the owner.‘or prospective owner of a | Iéaltion grams. A library that cost thousands of dollars, tocom- | ocaze tnd Revale | pile but that comes to you free for 7 days’ examination. | Commercial Trucs Men like you are wanted ating field of automobile engineering. We ae you to fit yourself for one of these positions. You don go to school, You don’t have to serve.an apprenticeship. Fifteen automobile engineers and specialists have compiled a spare time reading course that will equip you to be an automobile expert without taking any time from your present work. AUTO BOOKS More than 100 blus ts of 6 Volumes Shipped Free Motors _ Now ready for you—an up-to-the-minute six-volume Construction and library on Automobile Engineering, covering the con- Cerburetors and Settings struction, care and repair of pleasure cars, motor | Lubrication trucks and motorcycles, Brimming over with advanced | Fiy-Wheels information on Lighting Systems, Garage Design and | Transmission Equipment, Welding and other repair methods. Con~ tains everything. that a mechanic or an engineer or a. motor car ought to know, “Written in simple language = that anybody can understand. Tastefully bound ‘in | American Morocco, flexible covers, gold stamped, 2,656 pages and 2,100 illustrations, tables and explanatory dia- | Only 7c a Day ‘Not a cent to pay in advance: First you ' see the books in your own home or shop. Just mail coupon and pay express charges when books arrive. You can read them and study them for seven whole days before: you decide whether you want to keep them or not. If you like the books send only $2 in seven days and $2 a month until the special introductory price of $19.80 has. been paid. (Regular price $30.00.) Along with the set goes a year’s consulting membership in the American Technical Society. (Regular price $12.) This great bargain offer must soon be withdrawn. Send No Money Now Don't take our word for it. See the books without cost. There is so much profit in this offer for you, that we urge you to waste not a moment in sending for the books. Put the coupon in the mails tcday. Send no money—only the coupon! American Technical Society Dept. A 208, Chicago, Ill. = American Technical Society, Dept. A 208, Chicago, Ill. Please send me the6-volume set, Automobile Engi- a a | =] =] I can get along without the books of days’ trial I will return them at your showing overy Membership are mine and fully paid for. think seven 4 t > (|. | | H | i i | Ken] | FIG) FIG.2 © FIGS FIG4 \ - | 4 7 > corps of experts for an en- 3 j
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ANDARD WHITE INK, Equally Serviceable as a Water Color or Air Brush Spray Of special interest and value to Photographers, \ for photo books; Engineers, for blue prints; Artists, Card Writers, etc. ) By return mail on receipt of 25¢ in coin or stamps J. W. JOHNSTON Arts Building \ Rochester Dept. P.S., New York PRIZE OF $25.00 _ $25.00 for you. Any wide-awake young man, in high school or private school, can win a prize of $25.00. All that is necessary is to spend a half hour ja day of your after school time, for a couple of weeks. Writeto POPULAR SCIENCE MONTHLY, 225 West 39th Street, New York Only Article of its Kind in the World COMBINATION KNIFE and PISTOL Knife for everyday use Pistol for every emergency - Shoots any .22 Regular Cartridge No Recoil 3% in. Long Wide. Protect your home or when out nights Practical, useful novelty—small, light, com- ipact and effective. Regular Pistol cleverly ‘concealed in high grade knife, with large, keen blade of best steel. y every sportsman Mechanical and fisherman—pro- tection for every home. Dis- Marve charges any .22 short cart- ridge as effectively as any pistol made—auto- matic safety makes it without danger to use. Think of it—this mechanical marvel, per- fect in workmanship and operation, at a cost much less than for any ordinary pistol. Nickel finished, packed in neat box, all coniplete, postage ¢ prepaid 5 —only Knife Closed _S. SMALL ARMS CO., INC. ROCHESTER, N. Y. nd Your Name and We'll Send You aLachnite {| es merely deposit the postm: for 10 full days. tf you, or if ai an t a diamond, send i' my of c & back. But if you decide to it] “send us $2.50 a month until $18.75 has been paid. “2.5.2 $4 WILL BUY A Beautifully Reconstructed TYPEWRITER With Every Modern Writing Convenience WRITE TODAY FOR ILLUSTRATED CIRCULAR Explaining Try-Before-You-Buy Plan HARRY A. SMITH, 306-218 North Wells St., Chicago, Ill. Ye SAVED BIG BOOK DO Your Own PLUMBING and HEATING at Low Cost Sénd for our big instructive 256 page well-bound Han- sm emp dy.-Man Book Catalog. Every Home Owner, Con-. tractor, Electrician, Farm- er, Factory Manager, etc., ° needs it. Shows over 10,- - 000 Fixtures and Supplies in plumbing and heating at wholesale. Shows how to save skilled labor, hard work and unnecessary ma- terial by Our New Cut-to-Fit Method This wonderful book helps you select and install the proper Plumbing, Water Supply System, Hot Air, Water or Steam plant. Be- sides being our Wholesale Catalog it has many . practical plans, diagrams, sketches, elevations, etc., showing how to do the work this newer, cut-to- fit way. Any handy man with a few tools can easily do his own installing with the aid of this New Handy-Man Book We have spared no effort and have gone to a great expense to compile this valuable book With economy still a neces- sity, it would be unpatriotic to send this expensive book broadcast to non-interested parties. Therefore, we request a temporary deposit for each copy of 25c which we ref: nd on first order, or we send our Bargain Bulletin FREE. Address Today Hardin-Lavin Company $500,000.00 plants behind our guarantee clence M onthly Power to d Clamp 2ench clamp, wer to any is shown A rep- -lamp shown above will hold the » «4k set under it in any position desired resents a holder, which goes through the bench in the manner shown. B ig the clamping arm. By tightening the screw C you fasten the work, and the more the screw is tightened, the more firmly the work is secured in place. The screw D is merely a screw to hold the holder A at the position and height desired.—J. W. Moors. Anyone Can Make This Elec- tric Water-Heater O make an electric heater that will quickly bring water -to a boil, take two thin copper plates, 5 in. by 8 in., and mount them on four spools, which will bring them slightly over an inch apart. Be sure that the screw which fastens the plate to the spool does not extend far enough to touch the screw from the other plate, for it would spoil the heater if there was contact anywhere between the plates ‘of copper. When the strips are thus mounted fasten an insulated copper wire to each. This may be done by soldering or by cutting a small hole in the end of each PEG “WY, 4, “, “tty Vy by WOOD. SPOOLS COPPER PLATES The contrivance is placed in an earthen- ware vessel and the current turned on plate, thrusting the wire through and fastening it. Each connecting wire goes to the electric light socket, or to batteries. In case batteries are used it will take a little longer to heat up. The best results are obtained when the heater is connected to a 110-volt circuit. When ready to use, place the heater in water in an earthenware vessel—never metal of any kind—turn : { : { = Don't send a penny. Just send your name and say. **Send me Lachnite mounted in a solid gold ring on 10 days’ free ; Serr Saves couse { Send your name now. Tell us which of the : g rite Today solid gold rings illustrated above you wish }| 4 ah = i B + (adies’ or men’s). Be sure to send finger size , 4) Harold Lachman Co., 12N. Michigan Av.,Dept.1208 Chicago, i | | | | | | | is 4526-36-H Cottage Grove Avenue
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the current and the water will quickly heat. "This is done by the current passing through the water be- - tween the two copper plates. Be sure to use only an earthenware vessel to heat the water in, since pottery is an insulator and the entire current will ass between the plates. A metal con- tainer would cause a short circuit. Any substance that is a good insulator may be used in place of ‘the spools to hold the copper plates the required distance apart.—F. E. BRIMMER. Making a Blow-Torch from an Old Generator ASOLINE torches are expensive, but by following.the suggested idea you can make a contrivance that will do almost the : same work. A hose 6 or 7 in. long, is attached to anual the water filler hole of an old motor- cyclegasgenerator. /4 Gasoline is then poured into the ap- paratus, the fumes from it being igni- ted at theoutlet. It burns with a small red flame, butwhen The old gas gen- airisblownthrough erator from the the tube it changes to an intensely hot flame which will melt almost anything. This torch can be used to perform ajmultitude of odd jobs for which a gasoline blow- torch is generally used, being just as practical—_ ERNEST SCHWARTZ. To Drill Beyond the Depth of the Bit-Stick O drill a deep hole in wood, beyond the capacity of the brace, often causes considerable trouble, but if you FAUCET WHEEL — The hole is drilled in the usual way; then the brace is removed and the drill turned with a faucet wheel follow the suggestion given in the il- tion, you will have no further difficulty. After the hole has been drilled, re- move the brace, take a common water- _ faucet handle and place it over the bit shank. Then complete the hole to the depth of the drill_—J. W. Moore. THE BEVERAGE Tho all-yoar-cound sott drink E For business men, professional men, men of sporis~~ golf , bowling,tennis, shooting, riding.For everybody,every: where, the year round. Bevo is hale bey refreshment for wholesome thirst--= : ‘an invigorating soft drink. Ideal for i the athlete or the man in physical or mental training--- good to train and gain on. Healthful and appetizing. Serve it cold Sold overywhore - Familios suppliod by Grocer, druggist and dealer. Visitoes are invited to inspect our plant> ANHEUSER-BUSCH ST.LOUIS | Build Your Own PHONOGRAPH LIGHT YOUR HOME || our R A few hours interesting PALIKEDAY—Cost te | | Wy @ machine exactly to svit your tor hours. Pure white 60 candle arme, case material, blue printe power light from coramon Kerosene. it building pbonographs for your a) MM SOLAR MANTLE LAMP friends. . approved by government experts. Write Today for Our Free = Beats » gasoline or electricity. : Entire y new. Every home inters Blue Print Offer ested. AGENTS MAKE MONEY. Agents wanted for our Weeks free trial, Write quick sell- ready built phonographs ing pian, territory and trial P ph Co LAR LAMP CO Solar Bldg., Kansas City, horaleon Phonogra Prestige Accuracy LD AND MARINE Registered U. S. Pat. Off. ‘The Depollier Waterproof Case now adopted by the Signal Corps of the United States Army for the saving of watch movements purchased during the war and for future use. Ordinary strap watches were not constructed , to withstand the wear and tear of field duty. \ A heat-insulated disk protects the delicate move- ment from the injurious body heat, of the arm, which has a tendency to dry or gum up the watch oil. Waterproof Oxidized Case with 14-k Solid Gold Disk on Back and 15-J Waltham Move- ment A A $45.00 Write for Booklet JACQUES DEPOLLIER & SON i Menlo of High Class Specialties for Waltham Watches aiden ew Tork, Dubois Watch Case Company. Established 1877 The Depollier Waterproof and Dustproof Strap Watch ERTS i| | - = = | zh | is “ 4 _ ? is, a ONE mes HALF it % | ed h. id | | re to ed i en he re Tm Stamped U. S..A. only for the U.S. Ar
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Radio Outfits Learn wireless telegraphy with real radio outfits that receive messages up to 1000 miles and send them from three to five miles, Complete sending sets con- tain spark coils, condensers, spark gap and oscilla- tion transformer. Radio receiving sets composed of loose coupler, Radio or Audion detestor, telephone receivers, insulator and ground wires. Authoritative book on wireless and instructions in each set give the wireless code and tell youhow torig up your outfit. These are radio outfits of the most approved type. Write today for complete catalog. Sending and Receiving Outfits One of our complete sending and receiving sets is shown at theleft. receiving outfit of the most modern type and a sending set, with aerialswitch and key, that conforms to Government regulations in every We'll send you sets di- rectif your deal- er hasn’t them. Price $5 to $65 (Canada $7.50 to $97.50) The A. C. Gilbert Company 310 Blatchley Avenue New Haven, Conn. In Canada: The A. C. Gilbert-Menzies Company, Ltd., Toronto In England: A. C. Gilbert Company, 17 rb Lane | TRAVEL THE COUNTRY $110 a Month at the Start with railway travelling public. They travel with - of their work. $110 a month, ‘and rise 6 studying our course three months ago hold positions today. 0 i during for entrance. Send in Coupon for Booklet—with full information. ACT! Waiting will never bring youa better usiness Training Institute, Buffalo, N. Y. OPPORTUNITY COUPON Standard Institute ur Only a common school Violin, Hawalian Guitar, Ukulele, Guitar, Mandolin, Cornet, Tenor Banjo or Banjo . Wonderful new system of teaching note music by mail. To first in each locality, we give $20 superb Violin, Mandolin, Unalete, Guitar, Hawaiin Guitar, Cornet, Tenor Banjo or Banjo abso- lutely free. Very small charge for lessons on'y. We guarantee suc- cess or no charge. Complete outfit free, Write now. No obligation, SLINGERLAND SCHOOL OF MUSIC, Inc. Dept.97 CHICAGO, IIL, Silage-Carriers to Facilitate Feeding Steers | OR steer feeding, silage is cheap and efficient. Whether it is fed to breeding cattle, fattening steers, stockers, or baby beeves, there is no other feed in the corn belt that can en- tirely replace it at the same low cost. An equipment for feeding silage con- veniently is shown in the illustration. 7 TRACK —1, FEED The silage is carried to the feed troughs in a very short time It is not elaborate or expensive, but is made strong and serviceable. There are three long, flat-bottomed feed- bunks, each 4 ft. wide and 36 ft. long. They are made of 2-in. lumber and are supported by 3-in. wrought- iron pipe set in concrete. The carrier-tracks are supported from above by steel posts and plank girders. They connect the silage chutes and the feed-bins. All the carrier-tracks are connected, so that one silo can be emptied at a time. The feed-bunks are used for both silage and grain feeding. Feeders generally plan to have the feed-bunks low, as high troughs have caused sagging backs in steers.—W. E. FRUDDEN. Floating Clips for Films Help Wash Them Properly ILMS, after they have been developed and fixed, should float in water but should not sink to the bottom of the receptacle. The bot- Cork clips keep the films afloat at just the right depth for best results tom always collects the heavier fixing solution which clings to the film. This necessarily prolongs the washing and requires more changes of water. In order to shorten this. time and also to minimize the amount of water The Boy’s Own Chemic | Laboratory Be a boy chemist with your own chemi tory. Work all kinds of amusing, intanestinta instructive chemical experiments like a real chemist, Find out how chemistry is used in the i everything we eat, wear and‘use. weird, puzzling tricks of chemical magic and mystify your friends. Geta CHEMCRAFT outfit and hay, endless tun as well as learn the principles of chemistry, “4 Each outfit is complete with a large ' harmless chemicals for working cach sxpeinane = times. aiso laboratory apparatus ard a Manual of Instruction. CHEMCRAFT is scientifically correct: colleges and endorsed by professor and . Four Popular Sizes No. 1, $1.50 No.2, $3.00 No.3, $5.00 No.4, $10.00 West of Denver, Colo., and in Canada, a little more Be sure you get CHEMCRAFT! ; by name at your Toy Store or Darwin : The Porter Chemical Company Hagerstown - Maryland Witbout expense to you, we want to send you the most sensational bicycle you ever laid your eves soe advance all the risk. Keep in our own big factory, you it at Factory W Price— middle en's profi itho it delay. (Show ad to Dad.) horns,parts,sup- plies — every- » Learn How to WRESTLE photographs by | Farmer Burns and Frank Gotch Make a Motor-Cycle Out of Your Bicycle with a STEFFEY MOTOR. i! to attach. Fits any wheel, More STEFFEYS =39qp,, in use than all others. Send stamp for circular and low fac- tory prices. Agents wanted. Dept. S, 5025 Brown St., Philadelphia, Pa. | ‘ | | It has a very wl. 2 1 = . $ ft BlackBoa, Biack Beauty ian't an ordinary wheel. Ithes 48 RAILWAY TRAF FIC Si ba INSPECTORS Beauty (while you ride) on a plan thy 2 \ simple. easy and liberal that ou won't | feel ie outlay at Small denosives =~ | | No need to save UD a lot of cash. We ‘Repair Kit, Tool Case \j \ and Stand FREE oe | Sundries. Dept. “DA The Demand Today Is Great by phia, Capable men are needed for this profession— Pay Pa. colors) Select y onths forthe work. Our graduates start at pa ries shi ona val \ ----- Wf 4 W/p G, right your owe home, br mail, | Wg Y 4! from the greatest wrestlers the world 4; the grand old man of the mat."* tausht | 0 0 Set Every and boy in America. no dif- SIT! ference what age, needs this wonder!ul course of of lessons. Write
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< the of y necessary in this process, cork clips are made. The clips consist of two separate pieces of cork held together The pail will accommodate a sur- prising number of prints, each one separated from the others with a small rubber band. These are attached to the edges of the films, causing the films to float. The clips will also facilitate the removal of the films without getting the arms and sleeves wet and they also prevent the films from being accidentally scratched. It need not be stated that they are suitable for prints as well as for nega- tives.—E. BADE. A Moisture Separator for Garage Air Line VERY satisfactory moisture sep- arator for the garage air line can be very easily made from pipe and pipe fittings of the dimensions ORY OUTLET as- sembled as | shown in the il- Nl COUPLING lustration. The ff device must be installed in a vertical position and the air lead must be upwards as indicated. The fittings consist of two 2-in. to %-in. reducing pipe couplings, 14-in. tee, 14-in. coup- ling and 14-in. pet-cock for drainage. These fittings, with suitable lengths of pipe, assem« bled as shown, make a practical moi oist air deteriorates MOIST AIR INLET tor.— CHARLES fere is a way to effec- H. WILLEy. tively dehydrate it playing at railroading with Send for Big, New FREE CATALOG (Colored Illustrations) Send for your copy now and get your Xmas train all picked out. It shows Lionel Trains in natural colors. Complete line—freight and passenger “MULTIVOLT” Transformer Saves Batteries Runs all makes of electric trains, toys and appliances house current trains, armored cars, stations, tunnels, semaphores; everything you need to start a first class railroad system. Catalog is free. Write name and address plainly. If Your Dealer Can’t Supply Lionel Goods Order from me. J. Lionel Cowen, Pres. THE LIONEL CORP. 48N, East 21st St direct from Lionel Trains and Transformers Are Reasonably Priced BEBE ll LOFTIS BROS. & CO. any articles as you wish and have all charged MASA in one account. Liberty Bonds Accepted. For richness, elegance, and artistic beaut; our Diamon Rings are 4 ta- - Our Catalog has 128 illus- ee pop) log is specially selected’ trated pages of Diamonds, Watches, artistic Jewelry, Silverware, etc. We offering wonderful values in Diamond Rings, Soli- taires and Clusters, in the popular mountings, plain and fancy engraved, at prices to suit any purse. Suggestions DIAMOND RINGS FOR GHRISTMAS GIFTS Every article in our Cai and priced unusually low. Whatever you select will are = — be sent prepaid by us. You see and examine the article right in your own all hands. If satisfied, pay i one-fifth of price and keep it, balance in eight equal its, payable thly Suggestions or Gifts SZ or Gift Rings, Solitai Diamond I Loftis Solitaire Di . Cluster Scarf Pi Order Dont bexy | Dept. F 871 re..$25 up Diamond Studs itaire Diamond i Diamond Scarf Pins Wrist Watches .... Watches, gold filled Cameo Scarf Pins, Dia LOFTIS BROS. & CO. THE NATIONAL CREDIT JEWELERS 108 N. State St., Chicago, lll. STORES IN LEADING CITIES iy, gS ie for Free Jewelry Catalog, select as ~ WY. People Wear Diamonds | ii REE WA I C H E TALOG ait IN it proval thenew Vig ig | les ch | It 7ele | ieres...... 10up Wom 22up | 7cle 200 up 22 UD We | ains, solid gold..... 122 up { ch. Fits = Send ay Shipping | {
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Build and Fly an Ideal Model Aeroplane An Accurate Scale-Dupl a Famous Fk Your Made fom These Celebrated Aeroplanes ‘ou can get from Ideal deale Co tion Outfit to buiid an dealer «, Complete Construc- tion Model of any of these well known machines. NC-4 (Naval-Curtiss Seaplane). ‘The frst ‘plane fy panes the Atlantic 44% ft. Model. DeHAVILLAND Battle Pl fighting ‘plane used by t the A: Taube Mon tube Monoplane. Geriman Peoli Racer. A racing-type aeroplane with Z a record for distance flights. deal Model Aeroplane Const - ing any of the above Aeroplanes oe tm Toy, Sporting Goods and Department Stores. Ask for because they are only ones that are true Send for the Ideal Aeroplane Book Tells all about Ideal Aeroplanes and Flying Toys: gives complete descrip- and prices: contains list of stores where you can get them. Get this book. sure: Contains 48 Pages. Sent Postpaid for Sc in stamps Ideal Aeroplane & Supply Co. Making Model Aeroplanes Since 1911 Cor. Houston & Wooster Sts., N.Y. City bring highest prices ever known —get ready Start right, get Rog- ers Improved Trap- pers Guide—Free— the best ever out. Rogers pays ces. grades fair- supplies ‘Send to- est —no dickering, get ip for biggest money for your ping charges-on FUR CO. ST.LOUIS Dollars in Hares We pay $7.00 to $9.50 a pair and We furnish guaranteed all you Use yard. barn, cellar, attic, Con- illustrated Catalog Free. STANDARD FOOD & 307 C Broadway for us. Wonderful profits easily made at home. We furnish high grade stock and pay you $7 to $10 a pair and ex- press charges for all you raise. Mastrated catalog and contract Free OCOD & FUR ASSOCIATION. Desk 4 New Yorki Two Ways to Keep an Engine Quiet SILENT engine is the ideal of all who own or drive cars. The valve tappets are responsible for a great deal of engine noise and it is comparatively easy to eliminate it. Remove the valve tappets from the FIBRE SLUG “ol Hard lead or copper is cut in the man- ner shown above engine case. Find the center and drill a %-in hole 1% in. deep in the fare of the tappet. Then cut a circular piece of fiber, 3/16 in. thick, to fit the hole tightly. Place the piece of fiber in the hole and give it two or three sharp | blows with a hammer to seat it | properly. File off flush with the top of tappet and finish the surface with fine emery cloth. Hard lead or copper caps may be fastened to the tops of tappets. The cups can be formed of No. 18 hard lead or No. 22 copper over the top of the tappets, by cutting a circular piece of the material 14 in. greater in diam- eter than the top of the tappet, cutting the edges at each corner of the tappet and pounding down the edges. Be sure the cup is down tight on the tappet and that it is soldered fast around the edge. Another method that can be resorted to is to place cardboard cylinders around the valve-stems and tappets. Take a piece of cardboard, shellac one side of it, and cut it so that it will just fit the valve housing. Then wrap it around the tappet and valve-spring, with the shellac side in, and fasten it with bands of soft iron wire at the top, bottom and center. Be sure that there is enough clearance for the valve- The cardboard is shellacked before being placed afound the cylinder spring to-work. After it is in place shellac the outside as this will prevent the oil from soaking into the card- board. If a repair shop is available the valves may be removed and placed in a lathe. With a turning tool taper the end sharply to about a 30-degree angle. Care must be taken to get the valve centered in the lathe, for if the points are the least bit off they will cause a side thrust to the valves when replaced in theengine.— JAMES LINDAY. from all otherset im power, - to six strokes being sufficien air rifle can 3 feat, ings to get out of crder. Vitite for interesting folder abott this wonderful gun, t all dealers, $4.09 Pacific-Coast McDONALD & LINFORTH, Call Bldg, San Francisco aaa Only and After Trial of ents fom ef BABSON Phonopanh Dis 1368 Bis. 90 to 125 Miles on i NS a Gallon of Gasoline! ices-and terms, also about ent—fits any ‘old bike. SHAW MANUFACTU RING CO. Dept.3ll GALESBURG, KANS. DIRECT FROM FACTORY TO YOU OuR or ur CATALOG WITH 600 OF THE LATEST ‘TO-DATE . DESIGNS FREE. “kK. ¢ GROUSE co. “UNSIGHTLY | SEND FOR BOOKLET SHOWING PHOTOS l OF MEN WITH AND WITHOUT The Perfect Leg Forms J PERFECT SALES C0.,140 W.Mayfield Ave., Dept. 45, Chicago, Ill. —y 3 So AIR RIFLE on = shoots harder and farther — than any other. Made on Mait-pump, compressing air in the 9 th? desired. Eachstrcke givesincreased You can learn a lot about Aeroplanes: how they i are built: operated and controlled. Ideal Model Aero- CORNER { put the parts together and build | trai i rs. le! cross the English Channel. 3 ft. Model. Li | by = S Go After & * and make Wy YY). == A high-grade, easy funning, speedy a === motorbicycle of dependable power at a saving of from a third to a half in actual money. of 30° uil with 2% H-P Motor, famous Breeze = Equip ’ === carburetor, high tension magneto. Automatic === lubrication. Chain drive. Simple, efficient 3 —= control at all times. Thousands in use. : } Address Dept. 1002 ad | by Ki : “BOW KNEES aise Belgian Hares
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Toy Engineering for Boys | 2 lan You can build this great Eiffel Tower with Meccano, and all the other models on this page. They are perfect models of the real thing, and they work. The elec- tric elevator in the Tower runs nght up to the top with its load and down again. The Auto- mobile Chassis has Differential, Worm Steering Gear, etc., and shows just how Dad’s car works. The Steam Shovel raises, YOU Can Build — and lowers and swings the dirt as it digs. And This Eiffel Tower the Tractor is a sturdy little power plant that will pull your toys like a switch engine. T | Each Outfit Complete; No Study Necessary 1M) You don’t have to study or know a thing about En 3X > gineering to build Engineering models with Meccano. 4 | You get a big, illustrated Manual of Instructions Xai Prices of which makes it all clear and easy; your fun begins ) Meccano Outfits the moment you open your Meccano outfit. No. 00, . . $1.00 > No. o tees = $1,000 Prize Competition with First Prize $250 Cash, for all Meccano boys y yy 425 DANDY MODELS 58 sx as 1200 These are only four of the fascinating models you can Andupto. . . 40.00 build with Meccano. Along with all Meccano Out- Motors fits from No. 1 upwards; you get illustrated instruc- Electric, Reversing, *$4.00 tions for building 325 models; then comes Book No. ectric, Non-Reversing, 2.00 2 With 100 Prize Models, and more are steadily being Clockwork Motor, 3.00 added. Always something new! Outfits and motors sent repaid on receipt of price. <a Get this SUPERB BOOK FREE The story of Meccano, told by the inventor, in a fascinating illustrated book called ‘‘The Wonder Book.’’ Send us your name and address and we will mail it to you free. Write today. Also ask for rules of Meccano competitions and cash prizés given for most original models, MECCANO COMPANY, Inc. = Al Division K 71. West 23d Street, New York, N. Y. Electric Tractor Automobile hassis Perfect Model of the Real Thing i SSS Sei. Mie = = | 3 | = AVA A = ; = : | ie E : = | | | | ‘ —
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TWO YEARS YOU ARE BADLY if you lack HANDICAPPED School You cannot attain business or social prominence. You are a successful business career, from the leading professions, from well- paid civil service jobs, from teaching and college entrance. In fact, em- ployers of practically all worth-while positions demand High School train- ing. You can’t hope to succeed in. the face of this handicap. But yow can remove it. Let the Americam School help you. FIT YOURSELF FOR A BIG FUTURE This Course. by some of s pro- essors, will broaden your mind, and make you keen, alert and capable. It is com plete, simplified and up-to-date. It covers al —. given in a resident school and meets all equirements of a High School training. sn the first lesson to the last you are carefully examined and \ USE SPARE TIME ONLY | Most people idle away hours a week. Probably you do. Use only one-fifth of your wasted hours for study and you can remove your within he, knowl You you wi you wil ga Ane and the you RUN.NO So that you may see for yourself how thorough and complete our the we invite you to take ten lessons in the tigh School —or any course of specialized training in the coupon below—before decid- ing whether you wish to conan If you then satisfied, we will refund your "AMERICAN SCHOOL OF CORRESPONDENCE Dept. H-758 Chicago, Illinois Explain how I can qualif: for the position Graduate‘ ...Lawyer ..-Elec. Light & Power Supt. ...Certified Pub. Accountant ... Hydroelectric Engineer, ...Accountant and Auditor Telephone Engineer Bookkeeper -. Telegraph Engineer | Wireless Operator ...Fire Insurance Expert Architect \ | Sanitary Engineer Building Contractor’ _.Master Plumber Civil Engineer ~/. Heating & Vent. Engineer Shop Superintendent Steam Engineer ',..General Education Course Name....... . eee Rest for the Arm-Weary at the Telephone OR those who have to stand up to a wall telephone during a long conversation this little accessory will prove a boon. First cut a piece of 34-in. wood about 5 in. by 7 in. in size (a shield design is best). Next cut a piece of the same wood about 4 in. by 4 in. Round off one end and hollow it out slightly The wall telephone is awkward at best. Why not provide this arm-rest? to the shape of a cow’s tongue. Next cut a bracket like the one in the. illustration. Fasten these parts to- gether in the manner shown and screw to the wall, first measuring the arm height to be assured of proper posi-. tion.—FRANK L. MATTER. Tests of the New Liberty Motor Fuel, ESTS made in the aeronautic laboratories of the U. S. Army and placed at the disposal of the Fuel Administration gave out that the fuel was made up of “approximately 65 per cent of benzol, 25 to 30 per cent of kerosene, and the remainder of a small percentage of amyl acetate together with, perhaps, small quantities of dis- solved solids, and other volatile liquids, as yet undetermined.” ~ The results of tests with this liquid in an aviation engine indicated that. an engine using the “Liberty Fuel,’ will, when consuming ten per cent: greater weight of fuel per H.P.-hour, develop about 3 per cent greater horsepower as compared with gasoline fulfilling the export specifications for aviation gasoline. The spark plugs, after the test, showed a slightly great- er carbon deposit than the plugs used in the run with gasoline. A flight of forty minutes” duration was made with the fuel, proving that the fuel would do all the work of gasoline. The department has now requested enough of the fuel to make full tests, but the fuel has not yet been supplied. DON’T BE A USELESS WEAKL! Weak, “—- » anemic men have no chance in the of life. ‘obod a Dattle don't The ST G man is. the they looks up to: who on every nd, whe gets ahead wor mo wins the woma are Wrac! by andinaigestion. You won't make friend, you = orany GET RID 44 YO HAN ICAPS You can do it—you pay if of the. ments that are king i will our prain, strenathen ital orga start fresh in the race of life, if you wililon FAG E THE FACTS AND t doesn’t make’ Act. any difference what your pres. et, condition is or even ii iscretions sbrought you to wil It the tight wan, human ilistand up the human icines or druggist’s rongfortismecan and will do for as done for THEM. My life has studyin met! Js of curii ills and broken down humanity, STRONGFORT, fixe as the operations of The Perfect Man, verse. 8 “GUARANTEE to improve you you will follow my directions te a FOR MY You Cadord d to be, Sonat tor id postage and mail you a copy at LIONEL STRONGFORT Physical and Health Specialist 1077 Stron institute Newark, N. J. FACTORY: T0-RIDER SAVES you Bey dire RANGER sizes. Greatly improv: rices duced. WE DELIVER = EASY PAYMENTS if desired, actory-~' er cash ices. ES, lamps, wheels, parts, ame at usual pri Do not buy a bicycle, entries ws until you get our or big mger catalog, low prices and’ liberal teres, postal brings everything. MEAD iNew TRIPLE TONE Trumpet Plays In C, Bb, and A This superb Blorite ‘Symphony Model Trumpet"’ cannot be equalled for indoor and outdoor work. ‘Just what musicians have long wanted Prove to yourself, in your own home, its superior tone and quality. Don’t buy acornet or trumpet until Sent on Trial zon have tied the y for illustrated catalog, just Easy Terms wt, of Blorite cornets, trumpets, trom- es, fites, bugles, drums, etc. SPECIAL INTRODUCTORY PRICES Blorite Instrument House, All the | Parts and Plans Bt YS Send P.O. money order or check. ’ Don’t send stamps nor coin. Ber like a SKEETER, no other will pare NIFTY. NOVELTY &.TOY CO. Learn to Dance! can learn Fox-Trot, One-Step, Walts Tatest “up-to-the-minute” society dances in your own ho" :e by the wonderful Peak Sys- of Mail Inacruction Dia Method: Easily learned; no Torn Specie ‘erms. Send, today for ” PROF. W. C. PEAK, Graduate of Castie House Room 103, 821 Crescent Piace, CHICAGO, ILL. DEAFNESS MISERY I know because I-was Deaf and had Head Noises for over 30 years. My invisible Assionetis Ear and will do it for ey are Cannot be seen when worn. Effective when Deafness atui ms. ut in, easy to take out. Are “Unseen Comlorts** To- Write for Booklet and my sworn statement of re) | at | o Scho H | COURSE IN| | art cial system of tiring exercises; no fancy : / i | 4 money in € absolutely guarantee AK : satisfaction. On that basis you owe it to a yourself to make the test. Check and mz » counon NOW for full } a ..-Mechanical Engineer .+-Automobile Repairman A. O. LEONARD Suite 306,70 Sth Avenue New York City
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Transportation—The New Sport for Real Boys If you only had a railroad of your own, or a fleet of power boats, what sport you would have! Just think of the fun being president, superintendent, despatcher, engi- neer and conductor on your own train or captain, mate, purser, helmsman, and engineer of your own boats. Ives Toys make this all possible. There are fine, big Ives Trains that run by electricity. Start the powerful electric locomotive by a switch; control its speed. Stop the train and reverse itat your will. With Ives stations, switches, sidings, semaphores, cul- verts, tunnels, bridges and other parts you can have a complete railroad system, as elab- orate as you wish. Then there are Ives Trains that are pulled by mechanical locomotives with strong motors that run a long time on one winding. Ives builds passenger and freight cars, baggage cars, coal cars—all kinds of roll- ing stock. They are built to last, just like regular cars. The Ives Mfg. Corporation Ives Boats are the newest and finest toys out. Made of steel and driven by screw propeller and strong, leng- running motor, Steered by a regular rudder, Ives Boats speed along at a great rate for long distances on a single winding, There are twelve models and sizes, among them being an ocean liner, U.S. Merchant Marine, patrol boat, launch, motor boat, freighter and others. Good toy stores and toy departments everywhere sell ° genuine Ives Toys. Be sure that the name “Ives” is on the train or boat you buy. For 4c in stamps we will send you either our book- let on boats or our folder on trains; both for 6c, The boat book contains rules of the road at sea, signals, dictionary of nautical terms and _ other comprehensive | navigation informa- tion. 191 Holland Avenue Bridgeport, Conn. > | ia | | i P lim im { t ¥ | ‘ 4 £ . a
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TRADE MARK BOYS! GIRLS! GROWN-UPS! The “Kidphone” is sold as a toy, but it is more than a toy, it is a practical; durable, superior telephone. Altho’ it is much smaller and weighs much less (receiver weighs 1{o0z.) it talks better than the one you're used to. The idea of operation is different, it is based upon the correct theory of voice transmission, introducing to America for the first time a far-reaching scientific principle, only recently perfected. Can be used for all sorts of purposes — in the house, in the play-room, on ‘‘Scout” duty, in games, etc. Ingenious! Instructive! Fascinating! An All Year ’Round Christmas Present. © Price $10. at your electrical dealer’s, department store, or from us direct. Department I AMERICAN THERMOPHONE COMPANY 114-116 Bedford Street, Boston, Mass. Used by U.S. and Allied ® A PASTE THAT TURNS INTO METAL WHEN HEATED Big Saving or rent le metals or and electrical stores, or sent by us postpaid SOLDERALL CO., Dept. 7 129 Sussex Ave., Newark. N. J. $180 > SSNS WSS EE. Stu- alified. x, tion. -Columbia Schools Est.1904, Drexel -»Phila.Pa. Dept. 10 OREM y The Police Key is as serviceableas awholebunchof ordinary keys; opens almost everythingy every house- owner should have one. Sent postpaid on receipt of 20 cents, three for 50 cents. Safety Key Holder free with every key. Sharpe Mfg. Co., Paterson, N. J. The Safest, Speediest Sled— See Kexible Flyer 2% _.. Its patented, grooved steel, non-skid runners make — steering easy and coasting safe, comfortable and fast. Has an all-steel shock absorber front. Cardboard Flexible Flyer steers. Write for it. S. L. ALLEN & Co., Inc Box 905L Philadelphia Unscrewing Pipe Without’) Pipe Wrench O tighten or loosen a pi ‘i round threaded object vie on is no special wrench at hand, Place coarse file between the jaws of . ordinary monkey wrench and the ob. ject to be turned. The teeth of the Slip a file between the jaws of a come mon wrench and loosen the pipe, file will grip the round smooth surface, being embedded in it by the pressure of the wrench. The file also grips the jaw of the wrench. This idea is varied by using two wrenches, one to hold the pipe while the other turns it. Or the pipe may be screwed in a vise with a file between it and the jaws of the vise. The illustration shows a combina- tion of the two ideas using a vise anda monkey wrench.—DAVID BAXTER, Emptying Jugs and Bottles Without Splashing HENEVER it is necessary to empty liquid from a large jug or bottle it will always splutter and gurgle, splashing a goodly portion of its contents outside the utensil it is supposed to pour into, and usually taking a very long time before it finally empties. This can be overcome by tak- ing an L-snaped tube and insert- ing the long limb of the L through the neck of the bottle into the air space beyond the liquid. The finger should be kept on the open end of the tube while passing through the liquid, in order to keep it full of air and exclude the liquid. The air, entering by this tube, will cause the liquid to flow out in an even stream, In an emergency, a sheet of paper rolled around a pencil will form a pas per tube that will answer the purpo —VICTOR TODD. To stop that gur- gling noise in bot- tles use a bent tube. Nh WU bR USE INTHE HOME - ANTEE ARAGE OR We 10 DAYS SY RGUAR = $ 25 3 facturer : match will do st Requires no acid or < tie ribbon QUICK ae re ta terms, big discount for cash, or earn ODAY ag one FREE throw my agency plan. 4 iN BUY, | EARN $25 TO $100 WEEKLY Write for catalog ‘‘G.” dy a short time daily under our instruc- Y Ay 38 to 63 inches. Only the genu- ine bears the flying eagle trade mark.
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com Pipe. surface, oressure rips the ng two e while pe may ween ymbina- se ‘ER. ottles ssary to rge jug ter and rtion of sil it is usually very > before »mpties. can be by tak- -snaped insert- ng limb through of the ito the beyond 1. The be ye while yrder to > liquid. ll cause stream. ‘paper n a urpose, Letter- and Bill-Files Made from Old Books HE writer has an artist friend who e% makes a practice of filing away’ old clippings and examples of other artists’ illustrations for future refer- ence. To suit the various sizes of CLEAT TOP COVER SPLIT & HINGED Old books may be used to good ad- vantage in the manner depicted here clippings he made his filing boxes from old books found in the attic, and the result was that he later made letter- and bill-files in the same manner. The best part of the idea is that the size of the file can be suited to the size of the prospective contents, and the cost is nothing. Old ledgers, and obsolete volumes can be used to excellent ad- vantage. The leaves are first cut out and the covers and back left intact. Then the ends and front are fitted with thin wooden walls made from cigar boxes, or a similar thin material. These should be both nailed and glued to the under cover and to each other at the corners. Split the top cover length- wise near the back and fasten the narrow portion to the side walls as shown. Then hinge the remaining cover to the solid piece with cloth and glue. A string and cleat serve to keep the cover in place over the contents. A file of this kind will be found very useful for keeping at hand recipes, household hints, and other miscellane- ous cuttings.—L. B. ROBBINS. How to Use a Hairpin as a Switch Fuse HAIRPIN will be found very useful for repairing burnt out fuses on lighting and ignition systems. By slipping the hairpin over the burnt out fuse and in- serting it in the original contain- er, the circuit is again com- pleted. This, of course, is only an emergency repair, until a new fuse can be obtained, as the metal from which a hairpin _—‘The hairpin in the is made is of too role of a switch fuse higharesistance . and has too high a fusing point to be used permanently for that pur- pose.—JOHN B. HERFORD. HEN leading industrial experts a few years ago came out with facts and figures to prove that it cost anywhere from $25.00 to $1,000.00 to re- place a trained worker —that indiscrimi- nate hiring and firing was a waste of human material and profits—that em- ployment functions vested entirely in de- partmental heads was costly—and that the conservation of man-power was not only economical but an efficiency factor — the employer began to think and to figure, ‘with the result that centralized employ- ment departments came into existence, thereby creating a new profession —em- ployment management. The Employment Manager’s The employment manager does not earn his salary simply by hiring—but by reducing the number of misfits and quits. Therein lies his big problem. To maintain a stable working force he must, by judicious selection, find the right man for the right job for the right boss. He must know the requirements of these jobs, and_how to keep round pegs out of square holes. This de- mands an intimate knowledge of departmental requirements and an understanding of labor policies. He must buy his help with just as much care as the purchasing agent buys raw material. Employment management today is a study of uman engineering. It is a real man’s job. Expert Help. For Employment Men With the approval and co-operation of many of the leading industrial concerns and employment managers, the American School of Correspond- ence has prepared EMPLOYMENT MANAGE- MENT AND SAFETY ENGINEERING. This course, which has been endorsed by Manu- facturers and Employment Associations, is now off the press and ready to help you solve your problems in this field. EMPLOYMENT MANAGEMENT AND SAFETY ENGINEERING is the result of over two years investigation and intimate study of every phase of employment and safety. Scores of plants all over the country provided valuable data, proved plans, methods and systems. In addition to this personal investigation, a num- ber of expert employment managers and safety engineers have contributed many of the chapters, each having written along the lines in which they have specialized. The course offers you nothin but EXPERIENCE. The knowledge to be gainex from it would take years to acquire — because it stands for years of practical experience, investi- gation and research. Concerns Who Co-operated The variety of production and_personnel prob- lems covered by the American School survey is best illustrated by the following partial list of representative concerns who threw open their vlants for investigation: Albaugh-Dover Co.—Ainerican Can Co.—Amer- ican International Corporation — American Rolling Mills Co.—B. F. Goodrich Co.— Brown Shoe Co.—Burroughs Adding Machine Co. — Cincinnati_ Milling Machine Co. — Common- wealth Steel Co.—Continental Can Co.—Crane Co. —Curtis Publishing Co.—Curtis Aeroplane & Mo- tor Corporation— Edward G. Budd Mfg. Co.— Firestone Tire & Rubber Co. — International Har- vester Co.—Jeffrey Mfg. Co. — Joseph & Feiss Co. —Maxwell Motor Co.—Miller Lock Co.—National Lamp Works of General Electric Co. — Packard Motor Gar Co.— Pierce-Arrow Motor Car Co.— Pullman Co.—Solvay Process Co.—T. A. Edison, Inc.—Timken-Detroit Axle Co.—Western Electric Co —Westinghouse Electric & Mfg. Co.— White Co.—Willys-Overland Co. A Practical Reading Course EMPLOYMENT MANAGEMENT and SAFETY ENGINEERING comprises a total of over 1500 fo pen a large and valuable collection of employment forms, charts, statistical tables, half-tone illustrations and engravings, and is neatly bound in flexible binding. . It presents proved facts; not theories; discusses plans and policies frankly, but without, bias; and gives con- crete and practical information on such important problems as follows: EMPLOYMENT MANAGEMENT: The Employment field—Organizing a Depart- ment—Functions and Personnel = Analysis ; Sources of Labor afeguarding Selections Training New Workers Systems and Policies Employment Forms Fersonal Follow-Up Labor Turnover Collective Bargaining MUTUAL RELATIONS: (including) Personal Service Work Lunch Rooms and Commissaries Housing and Transportation Problems Employe Representation House Organs INDUSTRIAL INSURANCE: (including) Employes’ Benefit Associations Service Bonus Plans ~—Insurance Plans Savings and Loan Club Medical Service Legal Phases The 100% Employment Manager The Employment Bibliography SAFETY ENGINEERING: The Human Element Power Equipment The Accident Problem Gen.Eng’ring Features Mechanical Guarding Specia},Features EMPLOYMENT MANAGEMENT and SAFETY ENGINEERING show how the plans and policies discussed can be applied to.personnel problems in concerns employing any number of men from 500 up, and engaged in any form of industry. Send No Money There is only one way to appreciate the great value of EMPLOYMENT MANAGEMENT AND ENGINEERING, and that is to examine it your- self. Let us send it to you, without any cost’ or obligation on your part. Keep it SEVEN DAYS before deciding whether you can afford to be without ‘it. Send no money—just fill in the coupon and mail it. American School of Correspondence Dept. ES 758 Chicago j American School of Correspondence 1 Dept. ES 758 Chicago Please send me oT complete Seven Volume Readi: Course on EMPLOYMENT MANAGEMENT AN: SAFETY ENGINEERING for seven days’ free ex- amination, shipping charges collect. If I decide to buy, I will send $10.00 within seven days after receipt of | books and $10.00 a month until the full price of : bas been paid. Should I decide not to keep the books I i will return them at your expense. : Occupatica. Age. | I ...........~0 q
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‘difficulties. The arc, 500 kilowatts capacity. Man’s left hand is on cathode control; right hand, on arc controller For the Radio Experimentes Working with Artificial Lightning By Lloyd E. Darling The old spark system as a transmitter is rapidly being superseded by three promising rivals: (1) The Poulsen are; (2) the Alexanderson high-frequency alternator; and (8) the vacuum-tube oscillator. fayette Station, Bordeaux, France—the largest in the world—uses a 1,000. - ktlowatt arc set. Too little is known of the arc. In California during the war the American Navy and private owners built a huge condenser and other The arc leads in size. La- apparatus—described in the following article—at which arc-produced poten- tials of 500,000 volts, 100,000 cycles, were tested. No man ever worked with such a potential at so great a frequency before. Read what they learned.—Epitor, ‘ find that a small particle of dust, or an insect alighting upon an electrode, when under the high potentials we have at our new testing station,” says Adrien L. Anderson of Palo Alto, California, “is sufficient to start a corona plume. “Sometimes corona plumes have been started by flies and wasps flying within two or three feet of the high potential leads. A long flash extends to the insect; which, of course, is immediately cars bonized. The flash, however, causes the corona to start and the plume is maintained until the voltage drops to a lower value.” The Palo Alto laboratory is probable the largest of its kind in the world. It is capable of generating a potential to earth of half a million volts, and at the same time at a sustained frequency of 50,000 to 100,000 cycles per second—a unique feat. The laboratory belongs to the Federal Telegraph Company and was built for the-especial purpose of test- ing transmitters of the Poulsen arc type, used by the Navy in the war. These range in capacity from two kilowatts to five, twenty, thirty, one hundred, five hundred — even r second, as in_ radio rom insulating for the uencies; i. e., twenty- ue to the fact that corona undamped wave current The huge outdoor condenser. Ceiling and’ »ground are one pole; the large electrode in the center of the room, the other apparatus, is a far different problem same voltages at commercial fre. five, fifty, or sixty cycles. This ig is more prolific when produced by of high frequency. With this kind current a small “jab” of corona appears, before it has had die away another cycle has occurred, and another “jab” of corona has been added to the first. The process being continuous, It results in the formation of large corona plumes, The apparatus which we _ illustrate herewith was that built to duplicate the high-voltage, high- frequency phenomena of the type encoun tered in operating a high-power radio station. The electrical construction of the laboratory, and _ its similarity to the radi- ating system of a transmitting sta- one thousand, kilowatts. In building the larger-sized trans- mitters many problems arise. Says Mr. Ander- son: The proper insu- lation of such large machines as the five- hundred __ kilowatt arc transmitter in- stalled at Annapo- lis, Maryland, in 1918, and the one- thousand kilowatt machine set up at the Lafayette sta- tion near Bordeaux, France, by the Navy Department, offered insulating of appa- ratus for voltages from 100,000 to 150,000 and at sus- tion will be made clearer by refer. ence to the figures on page 132. In the first figure the antenna and the earth form an. air condenser. The dotted lines represent the electrostatic lines of force. The waves travel long distances without hindrance. In the second figure the high- voltage plate and the grounded lin- © . ing of the building form an air con-, denser. This sys-. tem will not ra- varying from 15,000 varying from to 150,000 cycles Flash-over on porcelain pedestal built to stand 110,000 volts, 60 cycles. Using 51,000 cycles it flashed at 100,000 volts Test of a string of standard transmission- line insulators, using corona shield. Cor- ona plumes three feet long are maintained diate for any great distance, and may therefore be | 4
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rimented with extensively without seterfering with radio traffic, whereas the emanations from the other would eause no end of trouble if used in ordinary laboratory routine. For all. practical purposes, the two systems are the same electrically, outside of the radiating feature. Ina regular radio station, the capacity of the system is fixed, because the aerial Lightning storm in Maine. Note similarities between discharges in Na- ture’s laboratory and those on page 130 is of a certain length and at a set distance from the ground. Unless you insert an extra condenser, you vary wave-length simply by varying the amount of inductance which is cut in on the aerial circuit at a given time. In this artificial testing station they - work it a little differently, in that the inductance is fixed and they vary the capacity by varying the distance between the plates of the big air condenser shown in detail in the center of page 130. As the illustration makes plain, the air condenser looks as if it were someone’s portable sheet-iron garage. In the center, however, rises a rectangular column of porcelain blocks built up in layers with sheets of galvanized iron between layers, a con- struction adopted because of its rugged- ness, cheapness, and effectiveness in operation. This column is merely a big insulator for supporting a huge electrode in the center of the building. This electrode looks like a life-raft, or a big pile of enormous pan-cake griddles covered over with something, or a flattened miniature Zeppelin. Its rounding, smooth-surfaced bulgi- hess stands out prominently in the picture. This matter of smooth sur- face and rounded corners was zeal- ously striven for, because in dealing with high-frequency, high-potential currents you must not have rough sur- faces and sharp corners. If you do, the current will promptly start to ooze off of the projections and the apparatus will break down its insulation before you have attained a mere fraction of the potential and frequency desired. They built the electrode up around a@ wooden form, tacking down the metal evenly and then soldering it. Every little projection was carefully filed off. A condenser, however, must have two electrodes—separated by a di- THE HEART WIRELESS An Amateur Station Without a Vacuum Tube Is Years Behind the Times $77.22 each Under agreements recently effected the Marconi V. T. is the only vacuum tube, or audion, which may be sold to ama- teurs, laboratories, schools of instruc- tion and experimenters, The approximate operat- ing life of the MARCONI V. T. is 1,500 hours. Fleming Pat. No. 803684 De Forest Pat. Nos. 841387-879532 Class I.—Designed for use as a detector; operates with plate potential of 20 to 60 volts. - Class II.—Designed for use as an amplifier; plate potentials from 60 to 110 volts may be applied. Tubes in either class may be used for detection or amplifica- tion, but those of Class I are best as detectors, and Class II tubes are superior as amplifiers. Standardized Socket $1.50 additional The Marconi Resist- ance, connected in the cir- cuit between the grid and the filament of the Marconr V. T., is made in the fol- lowing standard sizes: 4 megohm, 1 megohm, 2 megohms, 4 megohms, 6 megohms. Resistances of any special fractional values up to 6 meg- ohms can be supplied. Standard Resistance, Complete $1.00 Send all remittances with order to COMMERCIAL DEPARTMENT MARCONI WIRELESS TELEGRAPH CO. OF AMERICA Retail Sales and Exhibition Rooms, 25 Elm Street, New York. Sole Distributors for De Forest Radio Telephone & Telegraph Co. 1868 Woolworth Building NEW YORK BRANCH OFFICES: Schofield Bldg., Cleveland, Ohio 136 Federal St., Boston, Mass. American Bldg., Baltimore, Md. 301 Commercial Bank Annex, New Orleans, La. Insurance Exch. Bldg., San Francisco, Cal. 109 South 2nd St., Philadelphia, Pa. ‘ ind Jab and ILMABEONT) Th 3 uous, ation trate ak e the | of a = Sta- made refer. gures lines lines fi The thout | high- } and d lin- fy ilding cons, lS SY8-. Tae a and re be
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- Who wants to be good boxer? _ Suppose you are walking with your mother, sister, or best girl, and someone passes a slight - ing rémark, won't you be ashamed if you can- mot take her part? Well, can you? Or suppuse you remonstrate with a’man . for striking a smaller man, and the bully turns on you. Can you hold your own? Wouldn't you like to? _ Or, if one of your pals says, ‘‘Come, put on the gloves and have’some fun,’ can you do ft, and get any “fun” out of it?: ~ Less than 2% of all men and boys -know anything about the art of self-defense. When the test comes, less than 2% are ready. Wouldn't you like to learn to box easily and quickly at half the usual cost? Marshall Stillman has developed a unique Shorthand Method" of teaching. Boxing. ,You can learn the fundamentals in six lessons jand can outbox older and stronger opponents ter two weeks’ study. His original princi- le has.enabled him to teach professional box- difficult blows and guards they could not by the old method: .: Professor Mike onovan, former’ middleweight champion of * @he world, who taught for thirty years at the New York Athletic Club, endorsed -this ;‘Shorthand Method,” and helped prepare khe lessons we send you. Boxing instructors and Y. M.C. A. physical directors are taking the course to use in their own work. ‘Thou- ds of men and boys in this country and nada—boys as young as. 12 and 15 and en as old as 50 and 60—have taken the course both for the boxing instruction and to keep in good physical condition and develop confidence and self-reliance. ae ~ It is the first time boxing has been success- fully taught by mail, and it is only possible because Marshall Stillman starts with move- - ments you are familiar with—holding out Your handfor a coin, the breast stroke in swimming, etc. The first thing you know, he ‘led you into striking correct blows with. both. hands, putting the. body weight behind them, guarding, ducking, feinting, etc. He teaches you the rudiments in front of your own mirror, before you face your first oppo- ment. When you finally meet an opponent, you know how to hit him, what to expect in feturn, and how to guard against it. . The special introductory price of the new Home Study Edition is less than you would pay for a single term of lessons by the old method. We will include, until further notice, ‘Three Rounds of Shadow Boxing,” 8 Jiu- Jitsu, or, bone-breaking holds and_ releases, and 8 holds in standing wrestling—and also a complimentary copy of Mike Donovan’s book, ‘Science of Boxing.’’ There are 175 illustrations in the co 'rs2. .. Frankly you don’t believe that you can earn all these things by mail. do you? All vight, we will take you on your own ground, we will send the course on 5-day approval. ‘If-you keep it you pay $5, but if you do not ‘want it, you can return it, and end the mat- ‘ter. Fill in the coupon—we will do the rest. Free Approval Coupon MARSHALL STILLMAN ASSOCIATION, "Suite F-11, No. 461 Fourth Ave., New York. You may send me at your risk, on 5-day approval, “complete Marshall Stillman “Shorthand Method” of Teaching Boxing, including all of the instruction I agree to return the lessons on the th day after receiving same, or else send you $5 on ibed above. fifth day in full payment. . a other metal ‘earefullyand electric. have just described is not enough. __ To provide the second electrode, the builders’ of. this outdoor condenser made the interior ceiling movable. As the illustration in the center of Page 130 shows, there are some cast- iron counterweights dangling on ropes on the outside walls of the garage-like ‘condenser. building. These hold. up. This one electrode which we . ' varying the inductance, gin you will remember, you do it chiefly by ‘aerial has a definite, fixed capadie' with relation to the earth. Of course altering the frequency and wave-length of the laboratory testing! system alters the voltage Produced: i. e., the position of the metal ceiling jp the condenser building has a most vita] effect on the potential the apparatug the building’s. interior metal.-ceiling: turns out. This is Paparent from It can there- the mathe fore be matical re. moved up lation thats and down bodily Rall 10°x] against .the pull of . the counter- The fre. weights. quency (f) This metal ceiling, the building’s walls, and all objects around the place are adequately’ grounded. The result is that the big is in cycles per second; the current (Z) is in am- peres; and the capacity ( C ) , that of the air condenser (or antenna) in micro- farads. 7 ig 3.1416. Since electrode in the indue- the center of: tance. of the the building system ig stands alone’ fixed, they on its insu- must vary pedes- voltage electrode of pillar’ is the the ceiling. the condens- loading inductor; it being in series with the electrode Or by chang- er.: The ceil- ing the aps | ing, the walls, and the earth, , ; plied frequency. The. | as.we have said, are all con- : td moving - the - ceiling nected to form the other method is the un- . electrode of the con- common featureof denser. The air be- ‘\. this particular: “tween is the dielee- system, outside tric. Thethickness .. i: i} / \ of itssizeand of this dielectric, { noteworthy. and thereforethe | } i} peculiarities eapacityeithe jf fF 4 of, physical condenser,maybe ; | 4 | appeate insulated elec- condens- er’s circuit is a fixed quantity, this pulling down or pushing up of the ceiling alters the wave length of the whole testing system. In an actual aerial circuit, Thus the experimental system is non-radiating +— for all this 4+ trode in the cen- warn Making clear the deserves ‘ter of the similarity between a attention — room, ‘or ( aerial the Poul+ an e outdoor con- denser’ shown at ete Sen are case may | The building im- ~ li : 3
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enera- cy al- AMELS supply in a lavish way every- thing you ever hoped to find in cigarettes! Camels are so unique in quality, in flavor, in full-bodied-mildness, in refreshing satisfaction that you should not delay your pleasure an instant! Try Camels out to the limit— then compare them with any cigarette in the world at any price! Quality alone would make Camels distinc- tive. But, behind quality is Camels expert blend of choice Turkish and choice Domestic tobaccos. This blend is a revelation to cigarette smokers! You'll prefer it to either kind of tobacco smoked straight, it is so mellow, so delightful. Prove conclusively that Camels are made to meet your most exacting demands; that you can smoke them liberally without tiring your taste! And, know yourself that Camels leave no unpleasant cigaretty aftertaste or un- pleasant cigaretty odor! Quality will make you keen for Camels! R. J. REYNOLDS TOBACCO COMPANY Winston-Salem, N. C. 18 cents a package Camels are sold everywhere in scien- tifically sealed packages of 20 cigarettes; or ten packages (200 cigarettes) ina élassine-paper-covered carton. We strongly recommend this carton for the home or office supply or when you travel. fre. 3 cles nd; ok ind hat alr ‘Ser na) TO- r ig ince luc- the is tage é 2 Me The iling cular: or AA MI > and | & rce DOMESTIC. 81 | this re pulse clo a ‘
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? _ HAYWOOD TIRE & EQUIPMENT CO. ‘“¢to build up trade— | Earned $2200 In Four Months This is Richard A. Oldham Mr. Oldham was telegraph cgentter for the Illinois Central Railroad for twenty ears. He is fifty~ sight years old. Oneday read one of my advertisements and the ssibilities of making money in Auto Tire Surgery business. In a few weeks he had SURGEON Make $2,500 to $4,000 Per Year @ Giving New Life to Old Tires 6A Haywood Tire Sur- geon can do more with old tires than was even dream- ed before the war. By the Haywood Method a Haywood Tire Surgeon can give 4,000 to 5,000 more miles of new life | to a tire that two years ago would have been thrown on the junk pile. And it’s easy to learn. HAYWOOD Stations are Needed Everywhere 20,000,000 tires wearing down every day. By Tire Surgery you can quickly repair, rebuild and give new life to tires seemingly all worn out. Cuts, gashes, tears, bruises, broken fabric, every kind of an accident that | can happen to any tire, inside or out, you can repair and save for long service. The chance to make money Is simply wonderful. $2,500 to $4,000 a Year is Possible { : If we told you all the truth you wouldn’t believe it. You would say, “it is too good to be true.” But you can see what a great field there is ior Haywood fire Surgery Stations—for this better way. Send Today for My Free Book | get your request, a fascinati: about tires—how aa torepair them by the Hay- wood Method—how to % start in business—how M. HAYWOOD, President 1161 Capitol Ave. Indianapolis, Ind. _ what to charge. In 48 DEAR SIR: Please send me by return mail ee od” who book on the new Haywood Tire S ry Me in front of you. iret tne details of your free school of repairing. coupon at the ieft. @M. Haywood, Pres. ®, Haywood Tire & Name ¢@. Equipment Co. 1161 Capitol Ave. Adaress____ % Indianapolis Indiana $10.00 FOR YOU. How would you like to make $10.00 a week during your spare time? Others are doing it by representing POPULAR SCIENCE MONTHLY. HIGH SCHOOL PUPILS Earn $5.00 to $15.00 a week during after-school hours. Are youinterested? Then write to Why not you ? Popular Science Monthly 225 West 39th Street. New York | Popular Science Monthly 225 West 39th Street, New York our illustrated catalog. Remoh Jewelry Co., 638 Washington Ave., St. Louis, Mo. = Publishes ii RT cash art as- / BAER, sigaments. MAGAZINE lessons an articles on Cartooning, Designing, Illus- trating, Lettering and Chalk-Talking. Criticises amateurs’ work, Full of in- formation for artists and art students. or money 20c a copy, $1 a year. end $I} NOW, Thrift Stamps Taken H. LOCKWOOD, Editor, Dept.520, Kalamazoo, Mich. fn Look and wear like diamonds. Bril- nee liancy guaranteed forever. Stand file, mw acid and fire like diamonds. Have no Remoh Gems The Skinderviken Transmitter Button Medical Stethoscopes; Dictagraphs: Loud Talking Devices; Wireless Tel. Transmitters; Howler Sets; Pressure and Sound Waves reproduced electrically forms the basis for the most interesting study in speech and sound transmission. ¢ Scientists and experimenters recognize THE SKINDERVIKEN TRANSMITTER BUTTON as the peer of adaptability and sensibility, consuming a minimum current. Among its thousands of adaptions are—Deafaphones; CHE rod Mechanical Stethoscopes; Detectaphones; Burglar Alarms; 7, ransmission of Music; Wireless Amplifiers. 00 Sent Postpaid Insured $1, © SE _ 335 BROADWAY, NEW YORK CITY in size. Lafayette Siation, Bordeaux France, the largest in the world, hag 4 1000-kilowatt Poulsen arc. The oyt. door condenser gave valuable data toward the plant’s construction. Said - Mr. Anderson in describing the Poy}. sen arc: It is an electric arc enclosed in a containing. an atmosphere of The electrodes are placed between the poles of a power. ful electromagnet which produces g strong transverge magnetic field tending to- blow the are out. Car. bon or graphite ig used for the nega. tive electrode, while the positive is made of cop _and_ water-cooled, : Such an are, when ‘supplied with di. rect current at suitable voltage ‘and shunted with ‘an oscillatory cir. “cuit, consisting of an inductance and capacitance, will] produce undamped oscillations in the shunt circuit. They have produced some exceedingly un- common results using a Poulsen are and the huge outdoor condenser. Though perhaps not of major technical importance, what the currents pro- duced will do to flies and insects is interesting, indeed. Says Mr. An- derson: - It may seem difficult to understand why there should be a tendency for the spark to jump to a body as small as that of a fly, which seemingly should be able to alight without harm upon the high potential conductor. This may be explained, how- ever, by the fact that the air surrounding a conductor carrying a high potential un- damped radio frequency current is stressed by a powerful electrostatic field, through which a charg- ing current flows to ground or to any object having electro- static capaci- tance. A’slight uniformincrease in the strength of this field may take place with- out the appear- ance of corona, but if one par- ticular section of the field sur- rounding this conductor is called upon to carry more charging current than any other portion, the field becomes un- balanced, while the corona forms at the oint on the surface of the conductor rom which the added charging current flows. The electrostatic. capacitance of a dust particle or the body of an insect is, of course, very small, but, small as it is, the additional charging current required the instant the insect enters the electrostatic field is sufficient to start a corona. This is true, however, only when the potential is near the corona point. It usually means the end of the insect. Corona plumes on the end of a high voltage electrode Other corona plumes. The display is beauti- ful, but do not touch! : purchased and installed a Haywood outfit. = short time afterward he wrote us that his in- ey Be : come in four months was as much as it had beenin Two and One-Half years as Telegraph Operator. i : A q : Use ; fe = Op } Price of diamonds. A marvelous synthetic tation. contain no glass. Sent C.0.D. subject to examination. Write today =
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‘every time a dust particle or insect ‘does. We present on page 131 some | ‘Maine; taken this last summer by Kittredge. The paths pursued. The point Mr.. Anderson makes’ about the charging current that flows . in the field also sheds interesting light on. why an actual lightning dis- charge pursues the irregular path: it hotographs of a remarkable electrical in the vicinity .of Milford, . Thirty-kilowatt Poulsen arc converter ‘of. the type used to energize ‘the huge ‘outdoor: condenser. in experiments y the lightning discharges are plainly 4 visible, and their close resemblance to those followed by artificial lightning is evident. -Lightning is up against the game set of conditions any other electrical discharge. of the kind is.‘| There is the same. “powerful : electro-; static field to start with,.and this: may even attain a super-charge before’ breaking down. ‘But when the: break-. ing down::does: occur, ‘there .are -rain- ‘drops, and dust: particles, and. small | ‘clouds in the -way which demand. a | - charge: This. proves. the’ straw” ‘which’ breaks: the camél’s ‘back: The need: for “charging the. objects. centrated the field all i in ‘one locality, ‘with the result that in less time than | you.can think; the. discharge, and the |} telieving of pressure, has occurred, the resulting “lightning,” so called, jump- | ing from one (probably invisible) object it has charged.to the next—its characteristically irregular ‘path’ Te- sulting. A Poulsen aré converter: ‘of thirty-. kilowatt rating supplies energy for. the ‘tests made with’ the .open-air con- denser. What a one-thousand, ‘Kilo-. watt machine would do.to it is open.to conjecture. In testing ‘insulators with the open-air condenser they’ are ordi- | narily hung on a pole put ‘up. for:that purpose near the entrance to. the little ‘building. . One end is contiected.to the big center electrode of the condenser and the other to ground.. Then again, when the full potential of 500,000 volts is impressed’ across the condenser, the big center electrode usually starts to arc to ground of its own ‘accord, a distance of about nine. bound pamphlets). Thirteen vol- illustrations, dia- | * fi umes, 6000 pages and 24 illus- Ask Our Experts Prepares for Electrical : trations. - “Prepares for all ‘Engineer, Power Plant Super- feet. 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They . or Chauffeur.’ Inval- bey ‘olumes, 3900 pages and Six volumes 2300 and “oustrations, plates and in plain, everyday language. | 2500 illustrations, Estimator, De is t Maker, Tool Designe Chit werner or | diagrams, charts, etc., help to 00. Special price, $29.80. make difficult points as sim- $30.00." Speciat price, $19 ‘Telephony and_ | Pleas A-B-C, Sanitary, Heating and . Telegraphy See our Free Examination—no "Ventilating Engineering Four volumes; 1728 pages and money down offer below Four 1656 2000 illustrations, plates and § diagrams. Prepares for Tele- ~ phone Engineer, Wire Chief, Ex- change’ Manager, Trouble Man or Telegrapher. Regular price, "| more than 1400 illustrations, ete. Prepares for.Sanitarv Engineer, ‘§ Heating and Ventilating Engi- $20.00. Special price, $14.80.“ Special price, $14.80. 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Regular price, want for a whole year. ' This serv-‘] Man or Bookkeeper. | Regular 14.80.° 00.Special 4.80. 0 ice is absolutely FREE; , | Dow Senn Any Money: Write:-the name ‘of the books you have after examination, just send us ‘want on the coupon and mail it to- You can send the balance of the .day.- We will send the books at once, ex-. ‘special reduced price the same way —§$2.00, - \press collect, and you can use them just as: each month (50 cents'a week). if.they were’ your own for a'whole week.. Start right’ now and learn to fill bigger Tf you. ‘decide you don’t want to keep. shoes. There will be a better job looking -them,: send them back at our expense.’ for you if you do. Be ready to meet it when : ‘If you like the books, as thousands of other it comes, Send the coupon now.} American Technical Society, Dept. X208, Chicaso, all. American Technical Society, Dept. X208, Chicade, examination, shine! cha and $2 each mo ing irges - Please send me I will examine = books and, if satisfied, will send 62 within 7 th until have aid the special price of ___—_____—" If I decide not to keep the books, I will return them by ex- Lent at your expense, Title not to pass to me until the set cary al Addrée Aaaress— Reference $25.00. Bpecial price $19.80.” | willhelp youmake moremoney. priee,$30.00- Specialprice 10.80, You can’t fail to understand |: CivilEngineering them, because they are written Machine Shop Practice ao Trams. Prepares f or Civil or Machine Shop Superint dent Engineer, .Transit- Thousands of photographs, or Foreman, Fouadryman. Pat- neer, Master Plumber or Plum- — Learn to Fill the | ave >me A un- are ical pro 18 An- why | | | rk to | a fly, light ntial how- i a eS. ti- ig h! i | any un- the g ctor rent 3 dust ia Of the | the atic isi |
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Ohio Maru Since at home tn shortest possible time, Morse or Wireless OMNIGRAPH AUTO- MATIC TRANSMITTER, connected with Sounder or Ruzzer, sends you mMessaves at any speed just as ex ae operator wanld Adopted by S Govt 6styles Catalog free OMNIGRAPH MFG. CO. Cortland! St.. New York Important Papers Read at Radio Meeting NDICATIVE of the spirit of radio, the. attraction the art has for its adherents, and of the remarkable expansion in the industry which has taken place during, and since, the war, was the large joint meeting of the Institute of Radio Engineers and the American Institute of Electrical En- gineers, held in New York City on October Ist. The radio art has now grown until it commands the attention of all engineers. Really, the transmission of power, the receiving of power, the communication end of it, the electron theory, and, many other things they deal with in radio, threaten to over- ,turn long-established methods of doing business in all engineering. It is with good reason that engineers and techni- cal men turn their attention to radio at this time. Three noteworthy papers were pre- sented at the meeting The first concerned ‘“‘Trans-Atlantiec Radio Com- munication,’”’ delivered by E. F. W. Alexanderson of Schenectady, New York. He took up the principles of, and prospects in, this particular field, dealing, especially toward the end of the paper, with what has been learned and discovered in the practical opera- tion of the Navy’s huge trans-Atlantic station at New Brunswick, New Jersey —with which he has been identi- fied. He believes that it will be possible to increase the world’s ca- pacity for trans-oceanic radio traffic approximately 175 times or more over what it is today by: (1) Reserving a “space in the ether’ of between 10,000 and 20,000°meters wavelength exclusively for such communication work. (2) Speeding up transmission and reception to at least 100 words per minute as against the existing twenty. (3) Spacing the various sta- tion’s wavelengths closer together (4). Improving selectivity Directive radiation will aid mate- rially in this. In fact, toward the end, he says: ‘The author is in a position to predict with confidence that directive radiation on a large scale will not only prove practical, but that it will prove the most effi- cient method of radiation.” We already have directional recerving with the radio compass. Now-comes directional radiation and on a large scale. What does not the future hold 2 A second paper was delivered on ‘Principles of Radio Transmission and Reception with Antenna and Coils Aerials,” by J. H. Dellinger of the Bureau of Standards. It was a most exhaustive treatment, bringing out and correlating a number of points yet too little understood Toward the end seventeen problems still to be worked on were outlined, which may be of interest to radio experimenters as sub- jects for theses. 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reviewed in full here. It and Dr. | Alexanderson’s paper will appear in entirety in the October Proceedings of the Institute of Radio Engineers. The third paper concerned ‘“Tele- phone Repeaters,’ and was given by F. B. Jewett and Bancroft Gherardi of the American Telephone and Telegraph organization. The history and appli- cation of various repeaters, particularly vacuum valves, were taken up in detail and analyzed. Repeaters have been but little discussed of late, especially more recent developments. To stu- dents wishing a bird’s-eye view of the subject, and at the same time an in- sight into the theory and practical operation of vacuum valves in this rather uncommon and out-of-the-way field, the paper is recommended. It | will appear in full in the Proceedings |. of the American Institute of Electrical Engineers shortly. | \ } — Navy to Broadcast News for. Benefit of Amateurs INCE October 5th, and by au- | thority of the Director Naval Communications, a code broadcast- schedule, addressed to all amateurs, has been transmitted by the Naval Radio Station, 44 Whitehall Street, New York City, on 1500 meters. This broadcast immediately follows the 9:00 P. M. press schedule. — Various items of interest to ama- teurs, such as the establishment of new stations, changes in wavelengths of high power stations, etc., are daily transmitted in this schedule. Copies of the code to be used may be obtained by any amateur by writing a request to the District Communication Superintendent, 44 Whitehall Street, New York City. When writing this request an amateur should give in- formation as to his name; address; age; data concerning any military service; commercial experience, if any; class of operator’s license, if any; number of words per minute he can copy; education; size and power of transmitting set, if he possesses one; type of undamped wave receiver, if one is installed; name of any radio organi- zation or club to which he may belong. The object of this radio broadcast is ‘to maintain the interest of radio amateurs and to train them in re-, ceiving code. Listen in for it tonight and see if you ‘ean catch it. Remember 9.00 Pp. M. in New York may not be 9.00.P. M. in your locality. New York time is Eastern time; Central time is one hour earlier; Mountain time, two hours earlier; Western time, three jhours earlier. So listen in accordingly. Unless conditions happen to be un- jusually favorable, it may be that the more Western States will be unable to copy. 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Amazing Audion Detector $31:75 $18.85, $22.00 Remarkab!y efficient and handsome audion control panels within the price limit of every amateur, built and designed for the audion, as only the makers of the audion can build it. In the past, instru- ments of this calibre have never been offered at twice these prices. d de Forest “Early English’’ finish; perfect work- ip and expensive design throughout. Type P-400 Audion Panel—Consists of tube receptacle, grid leak and condenser, rheostat and binding posts for connection to tuner, A and B batteries on bakelite el 714"x7\%" without cabinet and B Type P-401 Audion Panel—Same as above $11.75 ype P-402, Panel with two switches for audion-ultraudion connection -and either 20 or 40 volt B battery in cabinet. .$22.00 Note—All de Forest audion apparatus is oscillator or ampli tu 7.00 ea additional. Catalog sent on receipt-of 10c én stamps to.cover postage. DE FOREST RADIO TEL. & TEL. CO., 1415 Sedgwick Avenue, New York City THE BEST Ves, the best and only the best is cheapest in the end. Then why not apply this rule when taking a course in wireless? Our |} correspondence course is simple, easy to master, up to dateand consists of 15 lesson books prepared by our expert theory in- structors. All practice and transmitting apparatus for mastering the code is fur- free. We Operate the One Big radio school of the world, and this corre- - spondence course is an extension of our activities; You see we are not A Radio School, but actually and absolutely The _Radio School—the top one, the biggest one, theone that has been and is turning out the winners every week. You can't compare us with any other school, because we are head and shoulders above all—the very top. You get the idea? You can't get a higher or better course; we are the final—the finish. - Make the move, settle your career to-day. Write for our new catalogue, our latest, just out of press Service Radio School Dept. P, 900-2 Pa. Ave., Washington, D.C. “ASK ANYONE WHO HAS USED IT” Brandes Wireless Headset TRI Al Buy a Brandes Su- perior Headset and OFFER use it critically for aaa ‘ten days.. Then, if ante it doesn’t come up:to our claims ; or your expectations, return i and your money will be cheer- refunded. Test it—com- vare with others—for sensitive- clearness, distance. Prove yourself the fine quality, “matched tone.” e two .toned exactlyalike, strengthen the signals and pre- vent blurring. Used by many U.8. Gov't experts and experts abroad; by colleges and techni- and amateurs everywhere. “Superior"” Set . $7 Send 4c for Catalogue R : BRANDES, 32 Uni Room 818, New York, U. S. A. ohms Aero Radio Surveying and Mapping By John Blogs Hammond, Jr., D. Sc. John Hays Hammond, Jr., has already attained fame as the devisor of uncom. mon submarine- and torpedo-guiding systems, using radio. Here he sets forth a new project—that of using radio compasses and -the airplane to survéy those regions of the world as yet uncharted. HE forerunner of industrial devel- opment of a territory is the ex- plorer. Millions of square miles of in- accurately mapped territories face us every day on our maps and eharts. Vast timber tracts exist that are scarcely known, unsurveyed miles of land that will some day bear a golden harvest, mountain ranges that have only been sketched by the passing traveller, whose rocks are rich with the metals upon which our industries depend. It is the ex- plorer who blazes the trail that leads the in- dustrial world to this untouched wealth and the vast supplies of the necessities of life which, when distributed to the great markets of the world, must logically stabilize and .even de- preciate prices. I have devised a sys- tem of aerial surveying and mapping by which it should be possible for vast tracts of territory to be mapped with a degree of accuracy and at a speed hitherto unattained in mapping. The main principles of the system are extremely simple. They make use of the air- plane, directive radio signaling to aircraft, and aerial photography— three important scientific develop- ments brought by the war to their- present high state of perfection. Applying the System It is hoped by the Aero Club of America to apply this system in the exploration of the Polar Basin, a vast territory concerning which man has but little knowledge. It is possible to achieve in a few mout'n~ .y the use of these new instrument ..+ies, results which before would, hy4v€ required years of enduring and. almost super- human struggle. Adm iral Peary’s ex- traordinary achiever..cnt:3.@Qme about only after such effort. Under the plan we expect to estab- lish a number of radio goniometers, or so-called radio direction-finders, at the ends of an extended base line whose limits will be approximately from Mackenzie Bay to Cape Columbia. Aeroplanes suitable for the type of exploration in hand will be equipped with powerful radio trans- mitters. It will be the purpose then of the explorer using an aeroplane travelling at the high speed of seventy or eighty John Hays Hammond, Jr., has pioneered in many radio fields Aerial photography assists.—Ep1ror. miles an hour—to fly out over the great ice fields of the unexplored Arctic Basin. On account of the open weather during certain seasons of the year, it will be entirely feasible for a base for these aeroplanes to be es- - tablished at some suitable point on the northernmost land. The explorer, fields, may observe a of land. This may be noticed partly by its denudation of snow, which occurs during the summer months, and partly on account of its difference of altitude from the ice floe. When he observes this conti- nental formation, he will change his course so as to fly along the contour of this land. Ultimately, therefore, he will encircle it. At regular intervals, he will transmit a char- acteristic signal, which will be detected by the direction- finders on terra firma, and which I have described. Thus, the course of the aero- plane will be constantly observed by the direction-finders and plotted on a chart at the shore stations. By having, let us assume, six direction-finders, three at each end of the base line, it will be possible for any inaccuracies in - observation to be minimized by taking the mean average of the readings. However, with all the care that may be exercised by this method, on account of the fact that the aeroplane may be at a distance of 400 miles at times from the direction-finding system, certain errors are bound to creep in. These would tend to make the obser- vation of the exact course which the aeroplane follows slightly inaccurate. Aerial Photography Helps In order to overcome this, and to form an accurate check of the system, a photograph is taken at each precise instant a signal is transmitted from the plane, during its—if I may coin a new ‘word—contouring of the land. This photograph will show in great detail the exact formation of the coast line below, so that although the rela- tively small movements of the aero- plane would not be observed by the direction-finders on shore while the plane is contouring these small inden- tations of the coast, nevertheless, we know from war experience that the pho- tographic record could be made such flying across the ice- continental formation 4 General Specifications All Models | a Beautifully ngraved and grained genuine bakelite 3 ae panels; 4 prong heavy nickled tube receptacles; smooth run- ning, positive acting, adjustable rheostats; impregnated e efficient mica stopping condensers; adjustable or fixed grid a leaks with polished nickel covers; bakelite covered binding ; ag posts with new slotted positive Sounesting feature; positive fea gegmentaily connected nickel plated switches; 40 volt B We battery of two 20 volt type units cast en bloc with operat- 7 eae. ing life of 6 to 12 months—a remarkable advance in B i | batteries: handsome quartered oak cabinets, round corners, ~ standa manslifi Type. P-402 Audion Panel—Larger panel with 40 volt B in cabinet. . .$18.85 T P-500 Audion-Ultraudion Panel— 4 | 1 | a | | i i
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as ‘to give in minute detail the coastal formation’s slightest characteristics. — Thus a series of photographs will ‘be taken, all successively attached to each other in a final composition, and these photographs will show progress- ively the outline of the coast. When they are finally assembled by a special device that we have developed, each picture would show upon its face the compass bearing, so that the direction which the coast line forms with rela- tion to the true North will be plainly depicted in each photograph. Photographic Contour Results Then, by assembling photographs at the end of the run, and by attaching them consecutively, we shall have a contour of the formation of the land photographically taken. At the same time, we shall have the path of the flight of the aeroplane mapped by the direction-finding system on_ shore. Since this path of flight has been along the coast line, we shall therefore have a second map of the new island or continent in addition to that pro- duced by the photographs. Now by superimposing the photographic map upon the radio direction finding map, we shall be able to eliminate practically all the errors and to fill in all the details. We shall therefore achieve at the rate of eighty miles an hour a method of surveying whose accuracy is such as to prove a valuable factor in exploration. The same method of surveying can be applied to the contouring of the bases of mountain ranges, to.the out- lining of forested tracts of land, to the tracing of the courses -of rivers, to the outlining of lakes, and to other types of surveying of this nature. With- out enduring the physical dangers of mountain climbing, the terrors of the fever-stricken swamps tropical lands, or of the treacherous ice-fields © of the Polar regions, the modern ex- plorer will be able to cover, while fly- ing thousands of feet above the surface of the earth, vast territories which he can map with an accuracy which the inaccessibility of these regions has hith- erto. prohibited. Other Regions Need Surveys In ‘Siberia and South America and Africa, it would be possible to divide up unknown regions into squares, which could be progressively surveyed by this system with sufficient accuracy to bring much important information and useful knowledge to industrial enterprises. that may undertake to open up these territories. After all the centuries, it remained for an American to discover the North Pole. It seems to me that it is an American undertaking to explore the vast Arctic Basin north of our conti- nent and to add the final chapter to human knowledge of the Polar regions. They thought Alaska valueless at first. Perhaps other rich areas await us. By Old Established Chicago Concern We want to open an up to date branch store on the main street of every principal town and city throughout the country High grade men are needed to manage these stores and to look after the demand_for our Made-to-Measure Suits and Overcoats in their terrigory No previous experience in clothing or tailoring business is necessary Man must be clean cut and a hustler. We Stock and Equip Store At Our Expense. You are not asked to invest a dollar. We furnish full stock cf sample goods. fashion books and advertising matter for distribution and equip your store completely all ready for business at our own expense, Earn $5,000 or More a Year You will be the “boss” of your Branch Store, and it will be “up to you” to make it pay you big money.in addition to your drawing account. We will pay you well from the very start as soon as you begin to work for us. When your store .is - opened we will allow you $175 a month from the net receipts. You will also be paid a liberal share (40%) of the profits your . store earns. A hustler, in a good location, should easily make $5,000 or more’a year. Start Work Now In Spare Time Send your application today on the attached coupon and we will arrange for you to start work at once in your spare time. All details will be made clear in our first letter and you will * receive expensive book of samples and fashions showing high character of our line. S. LEVY, Manager, Dept. 828 325 S. Franklin St., Chicago, Il. Send Your Application Today—Use This Coupon S. LEVY, Manager, : Dept 828, 325 S, Franklin St., Chicago, Ill your offer also fashion book with sample. TOR of today are fortu- nate to live in the age of the Autoand Tractor Businses. It is the greatest business in the world. Never before has there been such a wonderful future for ambitious men. , Big Demand For Trained Auto Men Think of it!—Six million automobiles in use and thousands more being sold.daily. Factories are rushed to the limit. Train automobile men are wanted everywhere. The demand exceeds the supply. That's the business you can learn here at our school,—and such is the op- portunity that awaits the trained automobile man. Earn $100 to $400 Monthly It is not at all difficult for a trained man to earn those salaries. Hundreds of our gradu- ates are doing even better than that. Auto Factories, Garages, Service Stations and Tractor Factories are continually calling on us for graduates to fill responsible postions. Many of our graduates -o into business for themselves. There are thousands of places where good garages and the services of competent trained men are necded. These opportunities are unlimited Complete Tractor Courses Included Complete instru:tion on the care, repair and mainte- nance of tractors is also included in our regular Auto Course. Tractor manufacturers give full co-operation. International, Moline and Emerson-Brantingham ’s. have placed machines with us for the benefit of our students. Brazing - Welding and Tire Repairing Taught _ in Separate Courses. Big Money Earned by Trained Competent Men in These Lines. Free Catalog—Gives com- ‘Big Factories Endorse lete information with views Our School— In fact they of school and equipment, al- so actual letters from satis- fied graduates. Write for it. Better still. train and come as hundreds do. guarantees protect you. MICHIGAN STATE AUTO SCHOOL Most Progressive Auto Schoolin America” — ‘n the Heart of the Auto Industry” Woodward me. Detroit, Mich. U.S.A. OETROIT Money-Back ‘TNE HEART OF THE AUTO Guarantee We guarantee to quall- fy you fora positionas chaufleur, repair man, tester, demonstrator. auto electrician, garage man, automobile desler or tractor mechanic and operator paying from $100 to $400 monthly or refund your money assisted in the arrangement of our present Course. They know our ‘equipments and our methods and heartily recommend our School. I am interested in the position you have open, Send me full details of, i NR i —$ $$ DETROIT The Auto Center is the \ if | Head and_¢ i | : ANS 4 accessory di q
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\ Get This 40- Page Catalog \\\Radio Apparatus ENA Postpaid This forty-page book of Radio Apparatus shows” nearly all the latest appliances both for receiving and send- ing wireless - messages. It is written in non- terms so that it can be understood just as easily by the inex- perienced person as by the wireless expert. Prices are low when consider the qual- 6A93 14—% K. W. Meteor Wireless Trans- 10,000 volt sec- eoe. $1413.95 are many = like this. book, Bock Sent FREE b ys FLERIBLE Sliding the inner tube in and out by means of the knob changes the capacity of this condenser soldered or riveted to the plates and, conducted to binding-posts near the center of the board. The condenser} is then ready for use. The other condenser is made from’ two brass pipes. One is three and a half inches long by one inch inside diameter. Thin paraffin paper is put over the inner pipe—just enough so that it can slide readily within the other. A little heat will make the paper stick. The condenser, when connected to the binding-posts, is ready for use. Care should be.taken to make all non-metallic parts of condensers of thoroughly dried wood, well shellacked. Fiber is better if it is available. So also are most of the patented substi- tutes for fiber and hard rubber, if ‘at hand.—RosertT J. HAGERTY and JOSEPH CHMIELNISKI. '| Quality | $ Here is a sample of ou Sears, Roebuck andsxChicago | ns - ow. Mount your Dec- « 4 erate home and dep. Hunters, trappers. 3 pature you need taxidermy. _In- teresting, fascinatinz, big profits. Join our school §5.000 students. Success guaranteed t our free book with= out delays Bend richtnow— today. School of Taxid 208 Elwood Bidg., Omaha 7 ig i = batteries. Cost 10c to 50. No expensive repairs, f pendable service. to required. Gio Start to build a big, p t, profit- y" = Here's your big chance to become SS: | | = ¥# i} an q ;
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‘one that can be made cheaply and A Renewable ‘‘B’’ Battery for Vacuum Tubes Ow that the vacuum tube has N achieved practically universal use there is a great demand for a simple “B” battery, or high voltage battery— easily by amateurs not caring to spend a large amount for a manufactured battery These latter rapidly polarize and become unserviceable. In the figure herewith is shown a very simple battery which can be made of materials found around the shop. The method of containing the battery and the elements used is merely sug- | gestive to the builder, although they LAYER OF ~ few ZINC THICK TERMINAL N OR — COPPER THICK REPEAT — COMBINATION % 48 TIMES oF ©), COPPER Here is a chance to make your labora- tory’s accumulation of old zinc and car- bon, or copper, into a good “‘B’’ battery happen to be of the same dimensions as a battery that was actually made. But as every experimenter has different materials available, the battery may | be made in any shape or form, provided the general principles are carried out. The container for the battery was made of a length of thick glass tubing, 4 in. inside diameter. Forty-eight each of the following were cut: Zinc disks, 4 in. in diameter, 1/16 in. thick; carbon disks, 4 in. in diameter, 1 in. thick; thick woolen cloth disks 4 in. in diameter. If the carbon cannot be cut to the stated dimensions, sheet copper '/:¢6 in. in thickness may be used instead. Two large corks were obtained which would just fit tightly in the ends of the glass tubing as shown in the figure. Through the corks, long screws were thrust, a connection being made to their outer ends. The inside ends of the screws press very hard on pieces of brass filed to make good contact. The bottom cork, the screws, and the brass contact-disk were put in place. Then the disks and the woolen cloths (which had been saturated with a solution, which we will refer to later) Every Hour, Every Day, Every Man Employs Great Think of the many great inventions we use daily. In the story that follows, a few of the inventions a business man uses appear in bold face type OUSED by my alarm clock before seven, I went to my shower bath, then shaved with my safety razor. Meanwhile the aroma of breakfast cooking on an electric stove tempted my appetite. At breakfast my wife made coffee in an electric percolator and toast on an electric toaster. Hearing the whir of the motor of the limousine, I consulted my watch and was told I had just time enough to catch the electric express train to the city. Reaching the office | I telephoned to Washington an important order and shortly after had a con- firmation written on the typewriter. At eleven I telegraphed to New England. At noon, my secretary having gone to lunch, I dictated a number of letters to a dictating machine. After dining at the club, seated for a quiet smoke, I listened to latest operas played by the phonograph. At two I had our new style flashlight photographed for a special circular and at three o'clock our addressing ma- chine started to work on the list to whom the circulars were to be sent. At four I signed letters and checks with my fountain pen. At five, the modern elevator lowered me from the thirtieth floor to the street. At six, upon reaching home, I enjoyed reading, with the aid of the electric light, a magazine account of a dirigible’s flight across the ocean. ; : Twenty-two great inventions have been mentioned in the preceding account. And these dre but a few of the many wonderful inventions you use directly or indirectly every hour of the day. The character of Chandlee & Chandlee Patent Service, is worth your consideration, if you have an idea or invention to protect. How do you go about it ? We send you our free book entitled ‘“‘ How to Obtain a Patent” which clearly outlines the course to be followed and which also explains many points of importance and interest to in- ventors. We tell you how to guard your invention or idea and give you complete counsel service up to the selling and marketing of your invention. were put in place as follows throughout the forty-eight: Carbon (or copper), cloth, zinc, carbon, cloth, zinc, carbon, cloth, zine, ete. Should the carbons and zincs make poor contact, they should be filed until they are shiny and make good contact. ‘Any one of the following solutions Our acquaintance with manufacturers’ wants and facilities, and our knowledge of patents and patent possibilities are offered together with our practical counsel, without cost during a pre- liminary investigation. Send sketch of your invention for report regarding patentable nature and exact cost of patent application. You should know in advance, exa tly what your patent will cost. Chandlee & Chandlee, Patent Attorneys, 412-7th St., Washington, D. C. LZ XI S 1 by, \ a \ : \ | 33:3 \7 é 4] on | a | | | ig
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est J PATENT sent Free on request. Highest References New York Offices 1001 Woolworth Bldg. DO YOU WANT TO KNOW How to invent w to raise money to apply for pa’ Mow and where to find buyers How to keep control of your How to estimate the tent ue of a patent Then send for a copy of THE INVENTOR’S MANUAL OF VALUABLE INFORMATION $1.50 a copy, postpaid Or additional information and Table of Contents G. E. PERRY COMPANY, 1328 Broadway, N. Y. PATENTS F YOU HAVE AN INVENTION which you wish to patent you can write fully and freely to Munn & Co. for advice in regard to the best way of obtaining protection. Please send sketches or a model of your invention and a description of the device, explain- ing its operation. ; All communications are strictly confi- dential. Our vast practice, extending over a period of seventy years, enables us in many cases to advise in regard to patentability without any expense to the client. Our Hand-Book on Patents is sent free on request. This explains our methods, terms, etc., in regard to Patents, Trade Marke, Patents, etc. %€ you are a reader of the SCIENTIFIC AMERICAN that it has ee act a to the tor. Each issue contains a & CO. SOLICITORS OF PATENTS 683 Woolworth Building, New York 624 F Street, Washington, D. C.. Tower Building, Chicago, IIl. Before disclosing an invention, the inventor should write for our blank form “EVIDENCE OF CONCEPTION.” This should be signed and witnessed and if returned to us together with model or sketch and description of the invention, we will give our opinion: as to its patentable nature. Our Illustrated Guide Book, HOW TO OBTAIN A PATENT, Contains full instructions regarding Patents, Trade-Marks, Foreign Patents, Our Methods, Terms, and 100 Mechanical Movements illustrated and described, Articles on Patent Practice and Procedure, and Law Points for Inventors. Prompt Service .. ADDRESS......... TRADE-MARKS COPYRIGHTS Reasonable — VICTOR J. EVANS & CO., Patent Attorneys Philadelphia Offices Pittsburgh Offices 135 S. Broad Street Main Offices: 760 9th Street, N. W.. WASHINGTON, D.C. GENTLEMEN: Please send, me FREE OF CHARGE your Book as described above. Chicago Offices 514 Empire Bldg. 1114 Tacoma Bidg, To the Man With an Idea fet I offer a comprehensive, experi- enced, efficient service for his prompt, legal development of his proposition. Send sketch, or model and descrip- tion, for advice as to cost, search and the . through priof United States pat- ents,etc. Preliminary advice glad- ly furnished without charge My apeiente and familiarity with various arts, frequently enable me to accuratel advise clients as to before they go to any expense. Booklet of valuable information and form, for properly disclosing your idea, free on tequest, Write today RICHARD B. OWEN Patent Lawyer 6 Owen Building, Washington, D.C, 2276-D Woolworth Building, New York City y probable patentability procedure. Prompt ersonal service Geo.P Kimmel Patent Lawyer 39-Z Loan and Trust Building, Washington, D. C. may be used. The simple sal g niac gives good results however Following are recipes for three different solutions: Solutions: (1)—4 parts water, part sal amnoniac; (2)—1 part a ammoniac, 1 part zine chloride 2 parts water; (3)—1 part bichromate ot potash, 1 part commercial sulphuric acid, 4 parts of water. The last solution is the best if the chemicals can readily be procured, for the bichromate of potash acts ag a depolarizer. This permits the battery; to give an enduring pressure of at least 1.5 volts per cell. This, for the: 48-cell battery, gives 72 volts which ig enough for most vacuum tubes. Man take a 50-volt current, so the battery may-contain only 35 cells if so desired; the other cells being added after g month or two when the battery jg getting weak. This brings the voltage up to normal again. The simple gal. ammoniac solution gives the battery q! little over 1.25 volts a cell. To secure 50 volts in this case, 40 cells are us to start, the others being added late as ‘required. The battery is intended to be kept in either a vertical or horizontal posi: tion in a small box which may be mounted behind the cabinet. After about three months, use for about four hours a day the battery will get too weak to use. It can easily be renewed and brought up to strength. in the following manner: Remove all the elements. With a blow torch or candle burn all acid off carbon (or copper) and zinc. Clean the glass container. Thoroughly soak strips of woolen cloth in fresh solution (after cleaning). Replace all as before. The battery now will last from one to two months more, depending on the amount of use it receives. It is not advisable to clean the elements again for they will be too far gone to be of any further practical use. Now all that is needed is a new set of zine disks which may be cheaply obtained. The carbons are burned ag before, the cloth again saturated, and the battery is again ready for use, Should the brass contact points not make good contact, the screws should be adjusted tighter until they do. It would seem that if the battery were made in a square shape, there would be less loss of zine for cutting. Either round or square shape will work | equally well. The disks of copper (or carbon) and zine need not be four inches in. diameter as here described. They can be greater or less. The larger they are, the greater the endurance (ampere- hour capacity) of the cell, and the longer you can use it. If the disks are no larger than a copper penny you will get a satisfactorily potential but the endurance will not be great. It may be advisable to dip the edges of the disks in a thin coating of paraffin to prevent the chemicals from work- ing from one woolen cloth to the next.—PHILLIP A. WALL. | | 4] 4 — | — | | | | | and Trade Marks rade Send sketchor model _ report. Write for Book- |: cnt legislation well atthe of instructions : | ~
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A Buzzer Set that Uses Little Current CODE practice set is a necessity A to get the arm tuned up for the ning of the amateur transmitting ee. A buzzer is not suitable for the purpose as its irregularity gives a ragged note. To overcome these de- fects the code practice set here de- scribed was ew and built, giving ifying results. Pore of actually breaking the LEPHON TRANS. BUTTON” TEL IND. | COIL RECEIVER “BUTTON The set makes use of the interactions of a telephone receiver and trans- mitter button placed next to each other circuit the well known phenomena of the interaction, or repeating effect, of a: telephone receiver held in front of a transmitter is utilized. This pro- duces a satisfactory high-toned note, clear and musical. In Fig. 1 is shown the front of the instrument. A 75-ohm receiver is mounted on the front of a small box of the dimensions shown. One terminal of the receiver is connected to the ‘diaphragm. - This has a small hole cut in its center to pass the tiny bolt of a transmitter button which can be pur- chased sepa- rately. The other terminal of the receiver and a flexible lead from the transmitter ‘button,are carried into the rey! box. A five- point switch is mounted onthe box to control the battery power. The interior arrangement of the box ‘is shown in Fig. 2. Five single flash- light batteries are obtained by splitting large flashlight batteries. mounted in the rear of the box, and are connected in series. Taps are taken off to the multi-point switch, as shown in the wiring diagram, Fig. 3. The cells are held in place by a strip of wood running the length of the box. A telephone induction coil in- cluded in the circuit and mounted in PHONES FIG3 Details of the set’s wiring. Primary op- erates continuously These are. Gasoline Tanks. A tank is desired that will withstand a salvo of 15 shots fired at a range of 30 yards, the ammunition consisting of caliber 30, equally mixed, service, tracer, incendiary, and are mor-piercing bullets, fired through the tank at the most vulnerable angle, without fire oc- curring in ten (10) consecutive tests on as many tanks, provided that such tank does not weigh more than 100 per cent. more than the standard tank as used on the DH-9A, which weighs 160 pounds for 69 gallons capacity and, provided further that redu pressure is not used. The Technical Division will furnish all the information in their files regarding previous experiments to those interested. Air Bag Floats and Landing Skids. These are to be used by land machines, usually of the light, pursuit type, operating over water. The object is to allow such machines to make a landing without capsizing and then to remain afloat. This has been accomplished, usually, by constructing the landing gear axle spacer so as to form a landing skid and by storing cloth bags in streamlined housings under the fuselage, together with a tank of compressed air, with the necessary piping and valves, of course, and sometimes incorporating an air tank within the fuselage, near the tail, Portable Hangars, for Field Service. The present hangars, usually made of canvas, are unsatisfactory, and the usual draw- backs are either that they blow down in winds or that they either leak or hold water in pools, or are too small. Any such hangar should be capable of housing at least four (4) DeHaviland planes with room enough left for working on them. They should incorporate the necessary wiring for electric lights and plugs for extension lamps. Gasoline Supply Gauges. Much is desired with regard to a suitable gasoline supply gauge. The gauge shouldbe responsive, serviceable, and accurate to the last one-half gallon. At present, the mounting for the gauge can well be left on the tank as it is thought that the mounting on the dash board will offer too many complications, unless done electrically. Central Electric Power Plant. By this is meant the designing of a single generator and battery which will furnish the power required for the radio installation, the heating and lighting installation, the elect starter, the ignition, the motor driven camera; together with the necessary, perhaps, trans formers or what not so as to supply these various apparati with the electrical energy need in its proportion and kind. This is to be engine driven in some way and this will do away with the head resistance of the various wind driven generators now used. Of course this must, as it most surely will, manifest a saving in weight. The motors that this is most de- sired for are the Liberty ‘12’’ and the Hispano-Suiza 300. Two ideas are desired, viz:— the application to those motors already produced and simpler design to be incorporated ia motors to be produced in the future. Mobile Independent Cranking Device. To be mounted on an auto truck. This device is to be an electrical driven cranker for airplanes not equipped with self-starters and is to be mounted on a motor truck. It is to be used at an airdome. Our idea of this device is one mounted on a truck that can be backed up to the front end of any airplane and then a flexible arm attached to the propeller. The electric energy is then to be brought into play which will crank the engine and cause the engine to begin firing. When the en®ine picks up, the device should be automatically thrown out of connection with the propeller. Any man with an invention whether as described above or of any other nature can write to us for advice and full particulars in regard to our service, It is the intention of Lancaster & Allwine to render as complete a service as it is possible to procure, toward the securing of Patents and the Registering of Trade Marks and Copy- rights for Manufacturers and individuals with ideas. If you have a problem,—an analysis, microscopical examination or physical test may solve it. Our organization includesa trained chemist and we are prepared to render serwice along this line. Do Not Lose Your Rights To Patent Protection Before disclosing your invention to any one send for blank form “Evidence of Conception" to be signed and witnessed. Establish your rights before filing application for patent. As registered patent attorneys we represent hundreds of investors all over the U. S. and Canada in the ad ancement of their inventions. Terms reasonable. The form ‘ Evidence of Conception,” sample, instructions relating to obtaining of patent and fee schedule sent on request. Ask for them,—a postcard will do. PATENTS AND —\TRADE-MARKS WASH- INGTON, D. Cc. BLDG. ‘the box as shown. This coil enables “supe. {LANCASTER Originators of Form “Evidence of Conception” ae United States Army Air Service q THESE INVENTIONS| age Way 2 off. the ter ‘he wo ble vill, et \ SQ) ot’ ld re | be rk n) | in. an. | re, & | he 1 re ill he. | he | in } he
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Terms Reasonable Write for free booklet Highest References Send model or drawing for preliminary examination and report as to patentability - Best Results |} ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSON E. COLEMAN, Patent Lawyer, 624 F St., Washington, D.C. YOU think of a simple, practical idea that will fill one of the many re- quests we have on file for new inven- tions? It may meana fortune for you. Thousands of things are needed RiGut ‘Now. Your brainscan heip. Send to- day for our great new book—“‘Inven- tions and Trade Marks, Their Protection and _ Exploitation’”’ and learn more abqut making money from ideas than you ever knew before. It tells many ‘things that are wanted, too. A postal will do— it is free the te ont of thar ADVERTISED Advice free. In INVENTION And MANUFACTURING SUPPLEMENT. AMERICAN INDUSTRIES, INC. 201 Patent Dept., - WASHINGTON, D. C. Published for the man with an idea. Send for free sample copy. One year'ssub- scription 50c. She Bok for ventor's and anufacturers By return mail FREE. Dept.M Washington,DC. ATENTS PROCURED and TRADE-MARKS REGISTERED Eighteen Years’ Experience. Instructions and Terms on request ROBB & ROBB, Attorneys at Law Specializing in Patent and Trade-mark Practice exclusively 840 Southern Bldg. 1336 Schofield ‘ Washington, ont” Free Book on Patents Before applying for a patent write for a Free Copy of our book “How to Obtain a Patent,”’ which contains valuable information and advice to inventors. Ictells how to secure Patents. Send a model or sketch of your invention for our ‘Evidence of Conception” form and our opinion of its patentable nature—Free. Twenty years’ experiencein patent matters. Write today for your FREE BOOK. 4622 Talbert Bldg., WASHINGTON, D. C. Don’t Wear a Truss Brooks’ Appliance, the modern scientific invention, the wonderful new discovery that relieves rupture, will be sent on trial. No obnoxious springs or pads. MR. C. E. BROOKS Brooks’ Rupture Appliance Eas automatic Air Cushions. Binds and draws the broken parts together as you would a broken limb. No salves. No lies. Durable, cheap. Sent on trial to prove it. Protected by U S_ patents. Catalog and measure blanks mailed free. Send name and address today BROOKS APPLIANCE CO., 255B State St., Marshall, Mich. Buy through your stationer Writefor 10-day TrialOffer E. Ganeher, A. A.M. Co. 148 Duane St., New York ‘Jf Canadian Agency will give our opinion as to its patentable nature. PATENTS 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 sketth and description of your invention and we RANDOLPH. & CO. 190 F St, N.W., Washington, D.C. IF YOU HAVE AN INVENTION AND DESIRE TO LEARN HOW TO the operator to interrupt the phone circuit by means of a key without affecting the steady operation of the repeater. Three binding-posts are mounted on the rear of the box tg connect to the key and phones, The connec- tions are clear- ly shown in Fig. 38. The first point of the switch is the off position. The second point switches electrically in two cells in series with the receiver and transmit. ter button through the primary of the induction coil. If a sensitive receiver is used the set will begin to operate, the note being inaudible at two feet from the instrument but clear in the Showing how fe. ceivers are connected together | phones. More cells can be switched in to increase the loudness and pitch of the note. Should the set fail to work even with all the cells switched in reverse the connections to the batteries and it will immediately begin to “sing,” The note is easy to read and remains steady for hours at a time. This device uses but .06 amperes with three cells in use and therefore ig remarkably easy on batteries, even to such an extent as to make it cheaper - to operate than the more commonly used buzzer.—THOs. W. BENSON. Radio Calculators — Check This Value of ‘‘Pi’’ HE relation between the circum- ference and the diameter of a circle, usually referred to by the Greek letter 7 (pronounced “‘pi’”), is much used in radio calculations. As a rule, the value 3.1416 is considered suffi- cient for 7. But if you are fastidious, hereafter use the following number: 8.141, 592, 653, 589, 793,238,462,643, 383,279, 502,884,197, 169, 399, 375,105, 820,974,944, 592,307,816, 406, 286, 208, 998, 628, 034, 825, 342,117,067, 982,148, 086,513,282,306,647,093,844,6 ... There are 128 digits in the number. Now and again, when other things lag, put in a few spare moments squaring and cubing the number, so you will have these values lying around handy when you need them. The value was calculated more than sixty years ago by a mathematically inclined faculty member in a European university. It is believed to be en- tirely correct.—ERNEST WELLECK. THIS ends our radio section for this month, In later issues--‘‘ Future of Radio munication with Moving Trains’’; van der Bijl, Practical Manipulation of Vacuum Valves’’$ Edison’s notes on ‘‘The Earliest Years of Wire- less,’? with h t and information of historical importance, and many other items concerning the wholesale experimenta- tion amateurs and professionals are carrying © out and the noteworthy results they are getting. What do YOU know that is new and inter- esting in radio? Send us your ideas, with pictures—plenty of pictures—and all the dia- grams you can think of that will help to make t idea entirely clear. We pay for acceptable contributions. | i } i | ( ii it | 4 | SUPERIOR SINCE 190 4 Over 390,000 in (js “PORTABLE: > $ Fecommendation’ Adding Machine ‘or Persona’ esk or = | Agents wanted |
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Getting There Ahead of Engine Troubles NY motorist can doctor trouble in his car after he knows where it is, but it takes talent and knowledge diagnose it. ac the most important matters to watch about the car is the condi- tion of the valves. Most cars are started by battery these days but The engine should be tested for cylinder compression every so often occasionally the crank should be in- serted to test the ‘‘feel’”’ of the com- pression in each cylinder and the valves ground if they show the least sign of leakage. But be sure the engine is heated before testing the compression, as sometimes the vaives are pushed off their seats by the ex- pansion of the valve-stems. Then see that the space between the valve- lifter and valve-stem is just enough to allow for this expansion. The engine should be cold when this is done and the space should be from three to five thousandths of an inch. The proper space will be given in your particular car’s instruction book. Two thicknesses of newspaper will serve as a gage when making this adjust- ment. Dress up the points of the circuit breaker at least once a month, as they easily become corroded and will not make good contact. This assures you that the primary current will always flow and cause the secondary to give a good hot spark. This can be done by drawing a piece of No. 00 sand- paper through the gap with the points closed. At the same time make sure that the points are distanced properly and that the spring is strong. The manufacturer provides a gage that you must use. Keep a close watch on the storage battery. The electrolyte must cover the plates at all times. Add distilled water every two weeks in winter and every week in summer. Test the battery every week, making sure that the specific gravity stands at 1.275 or over. If it goes below this stop and consider whether you are using the lights and starter too much and thus Watermatis{dealfountain Pen Brings immediate pleasure and evears of appreciation to all~~ LEWaterman Co. IOl Broadway NewYork Chicago. Boston. Sanfrancisco. Montreol Popular Science Monthly will make you a bigger man—a better money-maker Prove this for yourself. Others have done it by send- ing $2.00 for a year’s subscription. Sold From Factory to Consumer In offering this casing direct, factory to consumer, we solve All) problem of securing a high- 4, grade tire that will give right service and fit price you'll pay. You want to save, but must be convinced. To prove merits of our claims, we. offer, for PUKING or resting — the wind through the woods H the time, the following prices, | a FREE OF WAR TAX: q and the draft through the : : ay Oe room may mean the same : List Price teed kind of a cough. Stave it Price Mon-Skid Tubes off with Dean’s Mentholated Cough Drops. Get them anywhere, Dean Medicine Company Milwaukee, Wisconsin MENTHOLATED aper a y auch Tad : r, 80 Drop on = vine that Cough “= y hem, alls than cally pean VS 21-78 15.70 2-75 Com- 82x4 34.58 91.75 3.70 vee" 36x4 89.38 9545 4.55 ation 3 49.19 § 4.75 other 3 51.48 3040 4.85 cash with order. We ship with : Wun | er today. Specify Clin- i > dia- cher, Q. D. or S.S. Address : 250 N. Broad Street, PHILADELPHIA, PA, f
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YOUR OPPORTUNITY Canceled Government Contracts We have secured a large quantity of Small Motors, Generators and Charging Outfits. This material is new, stillin original cases and carries the full factory guarantee. This is Your Opportunity to buy new, guaranteed Electrical Apparatus of Standard Manufacture For use on 110 volt, A. C., 60 cycle, single current only. $48.50 “Samperes $68-5° Mail $5.00 cash or 200 sate | mination. ALL MOTORS COMPLETE AS CUT 1 H.P. i 4. cycle,single phase 1750 R. P. M. WASHING MACHINE MOTOR INDUCTION H. TOR SDD 110 or 220 volts, A. C. ) 60 cycle, single phase, 1750 R. P. M. MONEY BACK All outfits complete with switch- board as cut shown. GUARANTEE WRITE FOR CATALOGUE. BARGAINS IN MOTORS AND GENERATORS. SPECIAL QUANTITY PRICES com POLYPHASE MOTORS REPULSION MOTORS MANUFACTURERS’ DISTRIBUTER CHAS.H. JOHNSTON - WestEnd - PITTSBURGH, PA. Every User of Tools This Handy Bag) Made of Harness Leather— for the genuine KLEIN tool bag. get it write us. MATHIAS KLEIN & SONS, Mfrs. > Perfect hearing is now bei Thickened Drums, Roaring an Hissing Sounds, Perforated Wholly or Partially Drums,Discharge from Wilson Common-Sense Ear Drums “Little Wireless devices, which WILSON EAR DRUM CO., Incorporatec 1206 inter-Southern Bldg, ‘LOUISVILLE, Will Appreciate Deafness re- ame stored in every condition of deaf- ) ness or defective hearing from causes such as Catarrhal Deaf- ness, Relaxed or Sunken | Destroyed Ears, etc, e Phones for the Ears’” require no medicine but effectively replace what is lacking or defective in thenaturalear drums. They are simple ‘the wearer easily fits into the ears where they areinvisible. Soft, safe and comfortable. Write today for our 168 page FREE book on DEAF: » Ziving you full particulars and testimor‘~'s. Kae ASBESTOS Strong and Durable products. For anything you want in Asbestos, turn to KEASBEY & MATTISON COMPANY Dept. S-4, AMBLER, PENNA.,U.S.A. . Owners of the world’s largest Asbestos Mines. We are miners and shippers of Crude Asbestos in any quantity. We produce all grades at our world famous BELL ASBESTOS MINES, in Canada. We also card fibres, spin yarns, weave cloths, and make all sorts of Asbestos THE BOY ELECTRICIAN. CANAL STA. 3, CHICAGO Principles of Everv-day Electricity. Popular Plans of Electrical * Apparatus for Work and Play with an Explanation of the 2.00 Postpaid, Popu'ar S-ien-e Monthly, 225 W. 39th Street, New York Cut 27 Cords of Wood a Day’’ says Noah Digge, of Jacksonville, North Carolina, Ottawa Log Saw under unfavorable conditions, and in sold and delivered $75 worth.” : 2 make big profits with the Ottawa Engine Saw. It is always on SAW ear to drive saw—no chains to tighten, no keys and no set screws. Auto- matic friction gy saw, allowing slippage under any pinch. 4-Cycle Frost Proof engine, Uscilla- saw equipment, in 2 and engine for all kinds of other work.” Tree Cutting Equipment Full information FREE us, full information on ‘ saw, fast cutting equipmen i / for sawing down trees. Low prices, now, on both outfi ©.cawa, Kansas. overworking the battery. [If this jg not the reason there is probabj trouble in the charging system which must be found and remedied. The ammeter is the pulse of the whole electrical system and a- close watch should be kept upon it. At some specific date note carefully just what amperage is going to the batte at various speeds of the engine, Then if in subsequent tests the ammeter registers differently at the same test speeds, find out why. Keep a supply of inner tubes in the car with the tire repair kit. A jack tools of all kinds and skid chains, Keep the tire on the spare rim fully inflated. Keep all the joints in the vacuum system tight. Learn the sim. ple tests and adjustments necessary to keep the carburetor at its maximum efficiency. The Hairpin Takes to the Movies EN the operator breaks the moving picture film he resorts to various repairs, some of which take 4 Film broken? Stick a hairpin in the sprocket holes and start grinding again a considerable length of time. Of course the audience fumes and re- marks about the poor operator in charge. So, operators, why not adopt this colleague’s emergency repair and start the film running again without undue loss of time. Often, when running a film, the splice will pull apart; but if a small hairpin is inserted in the sprocket holes of the film it will serve to hold the film together until the film is re- wound, when the proper splice can be made. Paper clips are often used in an emergency, but if there is very much tension on the lower take-up of the projector it will pull apart. If, however; a hairpin is inserted in the sprocket holes, there is no danger of its pulling out unless the film is torn. Of course -it must be wunder- stood that any such emergency splice should be put on the film © below the rollers of the lower film magazine.—CHARLES S. STUCKEY. | | | 4 Suitable for oper- 4 a. — Drill Presses, ete, s - Combines all the good features of the various - common leather bags. Strongly built for rough bt usage. Bottom is three ply and steel studded. ey Has saw and bit holder, hand strap, and shoulder :s strap with pad. - A mighty good, all-around tool f oe bag. Six sizes ranging from 14x 8 inches to 24 a x8 inches. Show this ad to your dealer and ask fe \ 52 ¢ For. tee “Now you can 40. cord: saw down trees wood e E. Long work of ten. No stopping ond a a Beware of 30 4 Unitafiona Days’ Trial
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Why Stay Awake to Call F the Nurse? N easily improvised substitute for the expensive type of clocks, ‘sometimes termed ‘program’ clocks, which have been in use in schools for ‘announcing work periods, recess, and dismissal times, etc., may be made as an attachment to the com- mon desk or bureau clock. Within certain limits, this clock may be used In case of sickness the clock can be set at desired intervals to tell the nurse when to administer medicine to indicate baking or cooking periods in the kitchen, or medicine time: in the sick-room, and no doubt for many other useful purposes. The construction comprises ‘a 4-in. - nickel-plated clock, the back plate of which is counter-sunk below the clock- - caserim. A wooden insulator-ring or hoop, faced with felt, is pressed into place inside the rim depression of the clock. A number of brass wire spring contact points are attached to the insulator-ring just tightly enough to allow them to slide along. The insulator-ring may be made from the inner member of an em- broidery frame and the contact points from 114-in. safety pins, cut and bent as shown in Fig. 3. The clock is secured to a wood base 8 in. by 4 in. by 1% in., on which is ‘also secured a small buzzer or elec- tric bell. A brass spring contact arm is mounted on a wooden hub, as shown in Fig. 2. This wooden hub has a cen- trally located hole extending part way through, and of a size to fit snugly on the setting knob of theclock. The setting knob being mounted on the minute arbor of the clock, the contact arm moving with it is, of course, car- ried around with the minute hand of the clock. The wooden hub also in- sulates the brass contact arm from the clock, but connection with an electric circuit is had through a stationary brass spring arm which extends from its fastening point on the clock base to a central point on the contact arm and against which it exerts only a slight pressure. The electric circuit employed ex- tends through the contact arm and through its base connecting arm to its fastening screw The wire portion of the circuit from this point con- tinues through the buzzer, and to THE ISSTON Hand Saws are everywhere in the world accepted as the high- est standard; for in saws, as in everything else, quality and durability are soon rec- sii ognized. All steel used in making Diss- 4 ton Saws is Disston Crucible Steel— specially made in the Disston Plant. Whatever kind of asaw you want— Hand Saw, Circular Saw, Cross- Cut Saw, Band Saw, Hack Saw, Buck Saw — get a Disston. Disston Saws and tools are sold by the better grade.of hardware dealers everywhere. Many of them specialize in Disston exclusively. Guy folate] te} Write for the Disston Handbook on Saws—it tells how to select, use and care far Disston Saws and Tools. HENRY DISSTON & SONS, Inc. PHILADELPHIA, U. S. A. America's Largest and Longest - Established Makers of Hand Saws, Cross-Cut Saws, Band Saws, Circular Saws, and Toois’’ Chi Cincinnati Boston SanFrancisco Seattle NewOrleans Memphis Bangor, Me. Portland, Ore. Vancouver, B.C Sydney, Australia Canadian Works: Toronto, Canada | | DISSTON SAWS AND TOOLS Standard for Nearly Eighty Years — and Growing Faster Every Year. Ei Tm i 3 i \ ; ] 19 20 oC 3000 boca 000 ? |. im i 5 4 ; i | . :
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i | you GEO E. LONG, President. . Keresene, Easy to start; easy to operate; no cranking; no batteries: all sizes—2 H-P to 22 H-P —stationary, portable and saw- rig outfits. Built with speed regulator; oscillator magneto; constant fuel feed Direct From Factory Since I started my factory years | I have been selling engines eat too the factory to the man on the farm or in oe shop, and always give 90 Days very engine must make good all I claim. 90 Days Trial! OU don’t need to pay a high price now, to own a high grade kerosene engine. In the OTTAWA ENGINE t high quality for a low price. My bi with low manufacturing cost, and my direct selling plan make the big value I offer. earn its own cost while you use it. Once you try the OTTAWA you'll know why every owner is a booster and why my big factory is working to capacity making en- gines to ship direct to farmers and shop owners. OTTAWA ENGINES Book FREE! book ‘‘How To = = facts you will want try any engine. GEO. E. LONG, Pres. OTTAWA MFG. CO. 1958 King St., KEROSENE ENGINES factory, I will send you an engine to Gasoline, Distillate, Gas and fuel mixer, and other features of superior- ity. Develops 80 to 50 per cent more than rated horsepower. Dependable always. Built for hard- est kind of work and to answer the power needs of the man with little or no engine experience, 10 Year Guarantee Whether you order on my payment plan or for cash, you get the same engine under the same 10- Every Ottawa must make good my guarantee. That’s the way I ship today as I have for years and ages And you will find my engines every- where year guarantee, and 90 days trial. sxo—and every user highly satisfied. ow Better Engines’’ printed in 8 colors, tells know, before you Write for this book and Spec- Low Prices today. OTTAWA, MOTORISTS sea Need This Free Book & Why spend dollars for repairs when cents will do? Write for this free book and learn how SMOOTH-ON IRON CEMENT No. 1 (50c a Ib. at Hardware and Auto Supply stores) will save you money. / SMOOTH-ON MFG. CO. Jersey City, N. J.,.U.S.A. ter Where SMOOTHO} Will Stop It. Powerful Generators ‘Like Cut $2.00 Prepaid Guaranteed J. SKINDERVIKEN 335 Broadway, New York City M-I-C-R-0-S-C-0-P-E-S minerals, textiles, crystals, bac- teria, plant-life, etc. A microscope furnishes unlimit- ed opportunities for intensely in- teresting investigation of things we cannot normally see. Tells difference between cotton, wool and silk; detects adulteration in foods, reveals different forms of germ and plant life. “Ideal Christmas gift. _ Alltypesandsizes. Satisfaction guaranteed or moneyrefunded. Write for particulars. Téchnical Equipment Co., Dept. 2A 22-26 East 17th Street New York City More Dependable Lower in Price The BEST Guarantee Liberal discounts to dealers; write for particulars Manufacturers of Automobile Starting and Lighting Batteries MUNCIE, IND. On Ability to turn out perfect threads at high speed on the “RUSH” job is just one of the OSTER features: OSTER Combina- tion Machines produce equally pleasing results in thread- ing bent pipe, bolts and nipples. Send for free OSTER catalog of 47 hand and power threading tools THE OSTER MFG. CO., 2180 E. 61st St., Cleveland, Ohio - COMBINATION MACHINES the RUSH Job STAR STORAGE BATTERIES THE STAR STORAGE BATTERY COMPANY U.S.A, a dry-cell battery, from which it ex- tends to one leg of the clock—to which it is “grounded.” In operation the wire contact points are slid along on the insulator ring in such relation to the divisions of the clock face as to cause a “ring” of the buzzer at any desired time or times, the completion of the normally open circuit being caused by the V-shaped end of the contact arm engaging the bent outer end of the contact points— the other end of said contact point being grounded on the back plate of the clock. Care must be taken to see that the insulator-ring is forced into place under sufficient pressure to insure the grounding of all the contact points. Periodical rings of the buzzer ar- ranged to occur at intervals of more than an hour must be in multiple di- BRASS WIRE CONTACTS IG2 Showing the details of the contact arm and contact points on the clock visions of an hour;as, forinstance, every ten, fifteen, or twenty minutes, which is of course equal to {, 4, or 4 of an hour. Short measures of time of only a few minutes for timing egg-boiling in the kitchen or taking temperature in the sick-room may be easily arranged by moving the contact points near to ‘the contact arm. The insulator ring should be spaced off to indicate minute divisions as a guide for positioning the contact points. Fixing a Key to Fool the Petty Thief ‘A. COMMON drawer or cupboard lock with a simple two-lever ac- tion can be made much safer by in- serting a small wire ring around the base of the stem and filing off the bar- ; 4 @ ; meow { A small wire ring is set around the barrel and the end of the key filed off rel of the key as shown in the illustra- tion. No other key, even if made to fit the lock, can then be pushed in far enough to turn. The wire should be fairly heavy and can be formed with pliers over a nail slightly less in diameter than the stem of the lock. It will then hold tightly in place, out of sight, after it is forced down with the key.— Morris G. MILLER. | | ‘ SMOOTH d More Fascinating Than A Camera | Trad: 4 sizes. Belt or = Motor driven
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Rub That Hollow Oilstone cn the Sidewalk HEN an oilstone becomes hollow W on the surface it is practically impossible to sharpen plane cutters, chisels or any edged tool that should Making unwonted use of the concrete sidewalk to true up your oilstone be perfectly straight across the cut- ting edge. If the user is not an ex- pert the surface of any oilstone is certain to become uneven. There are several ways in which to recover the true surface, but I have found the following method to be the most rapid and one which requires no tools. Place the oilstone face down on a medium rough cement sidewalk and rub with a circular motion until all the high places are ground away and the oilstone is touching the walk at every point. If there are scratches on its surface place a piece of sandpaper on a perfectly flat surface and grind the stone down until it is absolutely perfect.—H. F. NEFF. Repairing the Firepot of an Old: Stove HE illustration shows the easy method by which I repaired the firepot of a coal-stove, and obtained another winter’s use from it after it had warped so badly that it would not hold fire. The grate fingers D D, at the base of the firepot A A had so warped and _ twisted that they left a good-sized opening at their lower ends at C C, with a space at F F, which made a fire impossible. I hunted up an old agateware pudding - pan that had good sides about 3 in. deep, cut the bottom out, and inserted it into the firepot. This reinforced the sides, as in E E, closing up the open- ings at C C. This simple arrangement did not interfere with the draft or with the shaking of the grate and afforded me the use of the stove for the whole winter without having to repair it again.—_N. W. GANDY. Repairing the old stove to make it out- live . another - winter To cur down the cost per cut A Matter of Teeth ‘The efficiency of a hack saw blade | almost entirely upon the rake, the “‘ and the pitch or number of teeth to the wo There’s no overhanging ‘‘hook”’ to the teeth ona Starrett blade. With proper adjust- ment of weight or pressure, they'll cut just as fast on the last cut as on the first. The teeth are uniform in shape, ‘‘set’’' and spacing.. That’s why every blade in a box of Starrett saws cuts alike. Starrett Hack Saws are made in varying pitches or number of teeth to the inch, from 10 to 32, according to the work they are intended for. Different kinds and shapes of metal need different blades for economical cutting. Get Starrett blades, use them according to the Starrett Hack Saw Chart and watch your cost per cut decrease. Write for Catalog No. 21 “W”—its free. THE L. S. STARRETT CO. The World’s Greatest Toolmakers Manufacturers of Hack Saws Unexcelled ATHOL, MASS. the blade aw a BUY AMPLE CAPACITY TO HANDLE Big WINTER = bat arging—an ‘More ears driven, more batteries Py e. If YOU don’ ats those profits, some other garage will. GET EQUIPPED N Small Payment Pas This HB OUTEIT in YOUR GARAGE Balance on it battertes 2 6 - volt tteries informati Hobart Brothers Company Box $114, Troy, 0. Successful Mnf’turers Since 1008 for Machinists and Toolmakers e ship direct from factory and guarantee to please you or refund ney ASerstecr Sons. St.. Dayton, Ohio electrical,rope, air- plane, piano, pipe- organ, flat, hoops, bale-ties, tacks, nails, barbed-wite, conerete re ment, springs, net- fing. -road wires and rail prtace Books Describing Uses, FREE American Steel & Wire Co.” Too. CASES | Direct from Factory to | You | ALL SIZES AND STYLES 2, 3, 4, 6, 8, 12, 16, 22 and 30 H-P. LOW PRICES Don’t wait if you need an engine | for any purpose. NOW is the time to buy. Life Guarantee Against Defects | Big surplus horse-power. Above price in- cludes engine complete on skids, ready to operate when you get it. Safe delivery guaran- teed. Immediate te factory shipment. Write or wire for big, new catalog of these wonderful engines, WrtTE ENGINE WorkKS 2223 Oakland Ave. 2223 Empire Bidg. PITTSBURGH, PA, 42-968 | | Big Profits in Battery Charging a é with theB 32-Battery Charger » 7 7 7, Y7, each; customer pays 75c to $1.50, als, no mechanical skill needed ii want these BIG PROFITS? ‘Tear (ej 0.
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Tool in your hands to appreciate its quality. The sharp, clean grad- uations and the fine finish speak of their quality in such a de- and durability of these tools were not guaran- teed by the Brown & Sharpe trade mark you would instantly know that both were assured i THE TOOLS THAT 4 SPEAK FOR THEMSELVES 4 It is only necessary to cided way that even by the quality appear- take a Brown & Sharpe though the accuracy ance of these world known tools. Send for Catalog 27 Brown & Sharpe Mfg. Co. PROVIDENCE, R. I., U.S.A. Sd A 6 > A Study in Concrete Posts How they should be constructed in order to give the best results By Roy H. Poston AVING had occa- sion to erect new posts to replace others that had evidently been carelessly put up, I made a study of different types of pier and post connection, and herewith offer the results. The design of any layout is affected primarily by two things, namely, the cost and the probable life of the build- One of the worst designs is shown in Fig. A. Fig. B allows drainage of the water ing. The second consideration is usually governed by the first one. The worst design encountered by the writer was the one shown by Fig. A. The end of the post was sunk in the concrete pier for about 3 in., the idea evidently being to prevent the post ‘‘working’”’ or being jarred off the pier by the motion of the water in the tank it supported. While it probably served this pur- pose, it also acted as a collector for rain and moisture, and this water, having no outlet but evaporation, subse- quently rotted the end of the post to such an extent that it was necessary to renew it three years after erection. Also the curb of the pier cracked in two or three instances, due, it was supposed, to the swelling of the damp post, and possibly. to a poor concrete mixture. In one instance the crack extended toward the center of the pier, thus weakening it. If it became necessary to repeat this method of construction a design similar to that shown in Fig. B, with openings in the curb to allow the draining off of the water accumulating therein, would be an improvement, but it would be a poor plan at best. Fig. C shows a common form of pier employed extensively by carpenters and building contractors. The main objection to this type of pier base is that frequently the top slopes toward the center instead of outward, thus causing the same trouble from -moisture collection as the one shown in Fig. A. However, with the beveled top, as shown in Figs. D and F, it is a good, economical design. The single bolt in the center of the pier serves to hold the post firmly in position. Expensive but Good A good method of construction is that shown in Fig. E; but it is some- what expensive on account of the iron- work, and is therefore probably only justifiable where the building is likely to be subjected to considerable trans- verse strain. Fig. E shows a special casting de- signed completely to encase and firmly hold the end of the post that supported an inclined conveyor housing con- taining heavy machinery in motion. This building, veing high up in the air, was subject to considerable wind stress, as well as the other strains common to this type of building. The cost of the pattern work, casting, and 7 : FIG D Fig. C shows a common form of pier. Fig. D shows the beveled form, which is a good, economical design | ft 4 = nN i. SS FESS 1 ES Vz, TO DRAIN | PIER FIG.B FLAN PLAN 4 { WELDED ¢ .
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machining was necessarily more or less high, but was considered necessary | because of the existing conditions. "As will be noticed from the diagram, it was necessary to incline the post, TOP VIEW OF E FIG.F Fig. E is a somewhat expensive design on account of the ironwork necessary thus adding a sidewise strain to those already mentioned, but the castings continue to serve their intended pur- pose after five years of service. This condition and those of similar nature of course require special con- sideration, and mention of them is made here only as a matter of interest. The design shown in Fig. F was con- sidered the best one encountered, having none of the disadvantages of Figs. A, Band C. On commonplace work, where no extraordinary or complicated strains are likely to de- velop, it will serve all purposes admirably. It permits of cheap con- struction, requires no special ironwork or castings, and, being beveled, will provide excellent. drainage for the bot- tom of the post; this last item being the main consideration in this kind of work. Here Is an Anti-Rattler for Tire Chains O you lock your spare tires on? If you do, and use the ordinary chain and padlock, you undoubtedly are disturbed by the rattling of the chain. You have also noticed that it bruises the paint on the parts with which it comes in contact. Perhaps you have adopted the common ex- pedient of covering the chain with a piece of hose, and perhaps you also have found the hose so stiff that it is still noisy and still bruises the finish of the car. Substitute a piece of heavy leather, the length of the chain you use and wide enough to form a tube to inclose the chain, and you will have arrived at a solution of your difficulties. Get the material at your local up- holstery dealer’s or from a department- store. Cut it wide enough to allow for turning in the edges. SAWING STEEL LIKE PINE At ATLANTIC CITY Here is a 28-inch Simonds Inserted Tooth Metal Saw being demon- strated to the Railway Master Mechanics at their recent convention in, Atlantic City. Cut after cut was made on an 8-inch Hy-ten steel bar without. resharpening the saw. That could be done because each tooth is’ made of high speed Steel scientifically shaped to produce longest and fastest cutting results and to remove a minimum of the stock. SAW STEEL PRODUCTS all may be relied upon to do their own work equally well. It’s the careful Simonds workmanship, and the good Simonds Steel —made in our own plants. with the utmost chemical exactness from highest grade materials—that have given Simonds Saws the power to outlive the hardest conditions. Write for prices on the Inserted Tooth Metal Saw or any other metal cutting or wood cutting saw. Simonds Manufacturing Co. Saw Steel Products “(Made Right Since 1832” Fitchburg, Mass. Chicago, III. Lockport, N. Y. Vancouver, B.C. | Memphis, Tenn. New York City New sin Eas London, Eng. Seattle, Wash. Portland, Ore. San Francisco, Cal. Montreal, Que. St. John, N. B. > | 3 . ' | { | q
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* ALL STEEL WRENCHES AND TOOLS Universal recognition in those princi- ples of manufacture which insure to the user of Mossberg products the utmost in value and in service. Such has been the standard of material, workmanship and guarantee, and such has been the appreciation of a multi-. tude of satisfied customers. ILLUSTRATED HERE ARE: Mossberg Socket Set, No. 17, for Ford Cars. No. 74, Adjustable Wrench; also solid handle wrenches, 6 and 12 inch, with speed No. 645, Reverse and Brake Pedal Ten- sion Spring Wrench, and No. 660 Wheel uller. Mossberg All Steel Socket. Wrench et, No. 45, which tains an rtment of 15 sockets, universal joint and speed brace. Send for complete catalogue and particulars FRANK MOSSBERG CO WRENCHSMITHS FOR 20 YEARS ATTLEBORO, MASS. U.S.A A ‘‘Loaded’’ Door-Bell Button HEN you are alone in the house, reading perhaps, or singing baby to sleep, and the door bell so persistently rings that you steal down- stairs unobserved and discover that your disturber is a peddler, or a collec- tor, or the constable, just throw over the switch and your door-bell button will become “‘loaded’’ so that the next time the unwanted caller presses the button he will get such a shock as to leave him with no further inclination to ring the bell. In the regular position of the switch the outfit is harmless. The push but- ton has an insulated case and a brass button, instead of a brass case and a fiber button of an ordinary push. TWO-WAY D.P SWITCH a BRASS BUTTON FIBRE CASE, GUARD & BUTTON BRASS CONTACT SPRINGS WIRE MAT [INDUCTION ‘The shock received by the peddler push- ing the bell will frighten him away. The indv2*‘on coil is the kind used in medical battery outfits. The wire mat must be so placed that «he person ringing the bell will stand on it.— FRANK GILLOOLY. Whitewash for Garage Interiors OTHING brightens up the in- terior of a dingy garage like a good coat of whitewash. It is a good investment aside from the looks, too, for it adds wonderfully to the distribution of light. Poorly pre- pared whitewash flakes off soon after being applied, and is money thrown away. Here is the United States Gov- ernment standard recipe for white- wash. Slake one half bushel of unslaked lime in boiling water, keeping it cov- ered during the process. Strain, and add a peck of salt dissolved in warm water. Add also three pounds of ground rice boiled to a thin paste and one half pound of Spanish whiting. Dissolve one pound of clear glue in water and add. Mix the whole thor- oughly and let stand for several days. When ready to apply, heat thoroughly and apply as hot as possible. Handy around the Kitchen There are many times when you need a pair of \Red REG US PAT OFF PLIERS in the kitchen. The han- d.e of the kettle may need straightening, or there’s a saucepan top to bend into shape. You can do so many things with these pliers, because they give -you such a grip, that they ought to be part of the kitchen equipment. They are like ‘‘Fingers of Steel.” Ask your hardware dealer to show you a pair of No. 1024 Red Devils. He will shave other styles of pliers for general or special pur- poses, but you cando many things with No. 1024. SMITH & HEMENWAY CO., 264 Broadway, New York Factories: Irvington, N. J. “Red Devil” is the Expert Mechanic's Guide to” known quality in pliers, electricians tools, hack saw frames and blades, auger bits, chain drills, and other hand tools, all of a class with “Red Devil” Glass Cutters, the most popular glass cutters in the workd. THE MIDGET SLIDE RULE _will solve any problem in addition, subtraction, mu division * and proportion. A Log-Log scale gives ‘any root cr power of any number. Gives Logarithms, Sines, Tangents, Cosines, Cotangents and the decimal — of fractions to six decimals, It from loss or disappointment. An in- ith each ru umeter 4 inches. viad+ in two models. Metal (white coated $1 White Celluloid, $1.25, Leather Case, 50c. extra. Your mon you are not sa isfied. Send for Catalogue of Slide Rules. GILSON SLIDE RULE CO., “NILES, MICH. Pilliod TOOL CASES EXCEL Machinists nd Too! Makers find them most satisfactory in construction, appearance, service and price. Imme diate shipment. Bookle: descrihing 20 styles on request. The Pilliod Lumber Co.’ Dept. A, Swanton, Ohio 5 AS . x 4 | brace 4 ~ q } \ x | | 4 4 ng ; | \ which sell fur $1.00 and are put a! gether with paper fasteners It is accurate, simple to operate and com NN parison shows that itis undoubtedly the SY N fastest and most complete rule made, J \ struction book. 10 pages. IZ Tw | 1!
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High-Speed Hand Drill No. 486 °0., The great speed of this hand drill makes __ all the steel parts are polished and nickel " it excellent for the rapid drilling of small _ plated. nell J. holes. One turn of the Crank rotates the The Chuck has three jaws and holds Chuck seven times. Round Shank Drills from 0 to % inch in \ ide to i hack This drill is trim and workmanlike. An diameter. “ id Aluminum Casing protects all the Gears This high-speed hand drill is typical of ‘ from dirt and breakage. The Gears are the other 1500 Goodell-Pratt Tools in | machine cut and packed in grease toinsure Workmanship and usefulness. The ma- } 2 ULE smooth running and non-wearing operation. terials that enter it, the care and experience = in dito The hich! lished Handle h used in designing it and the sturdiness with ’ - gnly ishe a which skilled mechanics have manufac- va . 8 you can feel proud to own. se tnd cn give ample drilling power. Aluminum con- Your deafér will be glad to have you ae ro does away with excessive weight. —_ examine this drill, or a more complete de- cause the Spindle to run gcription of this or any of the other 1500 an smoothly and with a minimum of effort. Goodell-Pratt Tools may be had upon All the aluminum parts are polished and _—request. od umber Co.’ ton, Ohio hey 1 Ba 4 ij 7 j
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Wait! Doxt syait until the freezing weather comes to think about protecting your car for the coming winter. Decide early to use Johnson’s Freeze-Proof—purchase your supply from your dealer and read and follow the directions carefully. A little time spent now in cleaning the radiator and* putting on new hose connections will save you un- limited time, trouble, worry and expense during the winter months. is the logical anti-freeze preparation to use. It is inexpen- sive—does not evaporate—is non-inflammable—easy to use—and guaranteed. One application will last all winter unless the solution is lost through the overflow pipe or leakage. One package of Johnson’s Freeze-Proof will protect a Ford to 5° below zero, and two packages to 50° below zero. For larger cars, or to protect to a lower temperature, use additional Freeze-Proof according to the scale on the package. Cost $1.50 per package in the U. S. A. East of the Rockies. FOR SALE BY ALL DEALERS S.C. JOHNSON & SON, - - Racine, Wis., U.S. A. ‘One Lasts All Winter bee : : | — & |
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AS A MAGIC LANTERN throws the detail of a photograph in greatly magnified proportions upon the screen, just so do the delicate lines of a blue-print visualize themselves in steel and stone in the towering skyscraper. An absent detail in a photograph in a magic lantern merely results in a void upon the screen; but a missing line or dot in a blue-print n too often means that some vitally important thing has been omitted from building or mechanism, which though long hidden, finally proves a fatal weakness resulting in terrible loss of life and property. A man is no stronger than his weaknesses permit him to be—the things built by men are no more perfect than the blue-prints by which they are constructed. The Wickes Blue Print System ‘‘Protects’’ Your Blue-prints It has been recognized the world over as the most accurate and efficient way to make Blue-prints. Write to us for the Catalogue 106 D Built by ws WICKES BROTHERS »» SAGINAW, MICHIGAN Builders of ‘Heavy Duty Plate Tools, Heavy Duty Engine Lathes, Special Production Lathes and Crankshaft Turning Equipment fn fn us WICKES BLUE PR oY WS fr WN = | | u | n| fi | QS | ‘ VS i i ‘CEE S | S} } — 1 | ECE
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-Vol.42_in the Famous Cypress_Pocket ae portraits of AUDUBON ial supplement «Suitable for Framing - ss Well, we suppose you’d better GET THAT BOY TO WRITE right away for this veryspecial V 4 the amous Cypress Pock- et Library. Just out. “Good Bungalows for Good Birds.” It is a wonderful compila- tion of bird lore and bird information. BIG DOUBLE SUPPLEMENT WITH 20 BEAUTIFUL AND COR- RECT DESIGNS—all spe- cially made by artists who know birds. (Not one is like the other good designs in bird ho:'se catalogs.) Also in this volume you will find 20 FULL WORKING PLANS | with Complete Specifications. And ALSO EXTRA ART SUPPLEMENT, 12 x 29 inches, in FIVE ‘COLORS with a total of 3 PORTRAITS OF AUDUBON SUITABLE FOR FRAMING, two of them being re- productions in 5 colors of 2 rare old steel engravings, also oo ieee of his home and of the Statue to his memory. -5 BIRDS in NATURAL COLORS and 180 correct pen portraits of other birds—with calls. “Your Cypress Volume 42 is one of the most complete and authentic books on this subject I have ever seen.’’ Thus recently wrote a bird-lover who has read much. * You will be astonished and delighted with the variety of the contents of Vol.42. Anditis FREE. Send yourname. Today is best. SOUTHERN CYPRESS MFRS’ ASSN. 1249 Hibernia Bank Bidg., New Orleans, La., or 1249 Heard Nat’l Bank Bldg., Jacksonville, Fla. Science Monthly DEC., 1919 Volume 95-No. 5 CONTENTS AERONAUTICS Page A Flying-Boat that Sheds Its Wings.......... 2 The Airplane that Leaped the Sea .........., 27 Suppose that Alcock Had Had This Airplanel.. 34 Showing That It Is Not Only Aviators Who Fall 34 A School of Correction for Airplane Motors.... 66 Doing Business on the Wing............. . INDUSTRIAL PROGRESS Extra! It Came by Airplane 24 Whitewashing with a Pump................. 27 Bringing the Laundry to the Wash........... 28 Introducing Women to Machine Tools........ 29 How Hot Is that Pot of Molten Brass? .:..... 29 Spotting Outlaw Cotton Fields............, << ae Papers Sold Like Gum...... F His Tool-Chest Is a Workbench Too.......... 38 Why Waste L ber in G Ne ne. 39 Aid for the Farmer in the Corn-Field......... 39 How to Clean Boiler Tubes. ................ 42 Providing Rapid Transit for Bolts of Cloth.... 47 Don't Kill the Fatted Pig.......... 47 This Machine Is a Complete Letter-Writer..... 50 Keep the Milling Machine Busy.............. 54 Sharpening the Teeth of a Metal Saw......... 54 Cleaning with Air-Driven Sand.............. 58 What Shall We Do for Oil?. ................. 59 Thé Pegs Tell Where the Trucks Are.......... 62 The Pull Tightens the Grip. ................. 66 Keeping Books by Machine.................. 83 Cut the Cost of Living by Cutting Terminal MEDICINE AND SURGERY Teeth-Pulling Made Painless by Electricity.... 38 Producing High Altitude in the Laboratory.... 74 MOTOR VEHICLES AND ACCESSORIES | Cooling Farm Tractor Engines with-Oil oe 30 A Universal Automobile Wrench........... Distill Your Own Water, Garageman.......... 33 New Type of Holder for Repairing Radiators.. 31 Squirt Grease with Compressed Air....... coos, (Continued on page 4) Copyright, 1919, by the Modern Publishing Company. PopuLAR SCIENCE MONTHLY is issued monthly Yearly subscription in the United States, $2.00. Canada, $2.50. Foreign, $3.00. Single copy, 20 cents. PopuLar SCIENCE MONTHLY may be had at all news- stands in the United States and Canada; also from the International News Company, London, and at Bren- tano’s, Raris. Advertising rates on application. Forms close the twentieth of the second_month preceding date of publication. Entered as second-class matter Dec. 2 1915, at the Post Office at New York under the act o March 3, 1879. Entered as second-class matter at the Post Office Department, Canada. : The contents of this magazine are copyrighted and must not be reprinted without permission. H. J. Fisher, President; R. C. Wilson, Vice-President; O. B. Capen, Secretary and Treasurer. Modern Publishing Company 225 West Thirty-ninth St. New York City il ICYDIESS DIFG DCOK: um ads | i } oo og | ~
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Page 2 2 34 34 6 75 24 . 24 . 29 . 29 . 38 . 39 42 . 47 47 “Out they came, the financier patting Preston on the shoulder ina. fatherly sort of way. . . . ‘Come to see me as often as you can, Mr. Preston, and remember that I'll back you to the limit.’” The Most Convincin I Ever Met Talker Everywhere this man goes, people shower him with favors and seek his friendship. Things which other people ask for and are refused, he gets instantly. How he does it is told in this amazing story. ET me asx you this: There is a big business deal to be put through. It involves millions of dollars. Putting it through depends wholly on one thing—getting the backing of a great financier. But this man is bitterly opposed to your idea and to your associates. Seven of the most able men and women in all America have tried to win over this financier. They failed dismally and completely. Now, could you, a total stranger to this man, walk in on him unannounced, talk for less than an hour, and then have him take your arm asa token of friendship, and give you a signed letter agreeing to back you to the limit? ‘ Could you? STOUNDING? Yes! Butif WAS done. And I'll tell you how. Here is the way it all came about. Fora long time the directors of our company had felt the handicap of limited capital. We had business in sight running into a million: dollars a month. But we couldn't finance this volume of sales. We simply had to get big backing, and that was all there was to it. Because of trade affiliations, one man—a great financier in New York—controlled the situation. Win him over and the rest was easy. But how to win him?—that was the question. No less than five men and two women—all people of influence and reputa- tion—had tried. They were all repulsed—turned down coldand flat. You know how a thing of this sort grows on you and how bitter utter defeat is. Well, we were talking it over at a board meeting, when one of our directors announced that he knew of only one man who could possibly put through the deal—a man by the name of Preston. So it was agreed that Preston was to be sounded out at luncheon the following day. He proved to be a fine type of American. At 34 years of age he had be- come president and majority stockholder of a thriving manufacturing business rated at three-quarters of a million dollars. Preston was deeply interested, as anyone would be over the prospect of closing such a big deal. The director in question said casually, ‘‘Why don’t you run down to New York and take a shot at it, Pres- ton?” Preston looked out of the window for a moment and then quietly answered, “You're on.” I WENT along with Preston simply as a matter of form to represent our interests. Aboard the 10:25 train out of Chicago we headed for the smoker and got to talking with the crowd there. Then I noticed something. Preston had dominated them all. Everyone was eagerly hanging on his words, and looking at him with open admiration. No sooner would he stop talking than one of the men would start him up again. And as the men dropped off at stations along the way they gave Preston their ¢ards, with pressing invitations to look them up. No doubt about it, Preston was THE man aboard that car. The colored porter, too, came under his sway. For that night, when the berths were being made up, the porter came unasked to Preston, told him that his berth was right over the car trucks, and insisted upon changing it to a more comfortable one. And so it went all the way to New York. Everyone who met Preston took a great liking to him the in- stant he spoke. They seemed to be eager for his com- panionship—wanted to be with him every minute, openly admired him, and loaded him with favors. Even the usual haughty room clerk at the hotel showed a great interest in Freston’s welfare. He showered us with attention while a long line of people waited to register. The next morning we called on the great financier— the man who was so bitterly against us and had flatly turned down seven of our shrewd influential rep- resentatives. I waited in the reception room—nervous, restless, with pins and needles running up and down my spine. Surely Preston would meet the same humiliating fate? But no! In less than an hour out they came, arm in arm, the financier patting Preston on the shoulder in a fatherly sort of way. And then I heard the sur- prising words, ‘‘Come to see me as often as you can, we _ and remeinber that I'll back you to the imitl"” At the hotel that night sleep wouldn't come. I couldn’t get the amazing Preston out of my thoughts. What an irresistible power over men’s minds he had. Didn't even have to ask for what he wanted! People actually competed for his attention, anticipated his wishes and eagerly met them. What a man! What power! . . .* Then the tremendous pos sibilities of it all—think what could be done with such power! What was the secret? For secret there must be! So the first thing next morning I hurried to Preston's room, told him my thoughts, and asked him the secret of his power. Preston laughed good-naturedly. ‘Nothing to it— I—well—that—is—” he stalled. ‘I don't like to talk about myself, but I’ve simply mastered the knack of talking convincingly, that’s all.” “But how did you get the knack?” I persisted. Preston smiled, and said, ‘‘Well, there’s an organi- zation in New York that tells you exactly how to do it. It's amazing! There's really nothing to study. It’s mostly a knack which they tell you. You can learn this knack in a few hours. And in less than a week it will produce definite resultsin your daily work. “Write to this organization—T he Independent Cor- poration—and get their method. They send it on free trial. I'll wager that in a few weeks from now you'll have a power over men which you never thought possible . . . but write and see for yourself.” And that was all I could get out of the amazing Preston. HEN I returned home I sent for the method Preston told meabout. It opened my eyes and astounded me. Just how he had won over the finan- cier was now as Clear as day to me. _I began to apply. the method to my daily work, and soon I was able to wield the same remarkable power over men and wom- en that Preston had. I don't like to talk about my personal achievements any more than Preston does, but I'll say this: When you have acquired the knack of talking con- vincingly, it’s easy to get people to do anything you want them to do. That's how. Preston impressed those people on the train—how he got special atten- tion from the hotel clerk—how he won over the finan- cier—simply by talking convincingly. - This knack of talking convincingly will do wonders for any man or woman. Most people are afraid to ex- press their thoughts; they know the humiliation of talking to people and of being ignored with a casual nod or a “yes” or “‘no.” But when you can talk con- vincingly, it’s different. When you talk people listen and listen eagerly. You can get people to do almost anything you want them to do. And the beauty of it = is te they think they are doing it of their own ree wil]. In committee meetings, or in a crowd of any sort’ you can rivet the attention of all when you talk. You can force them to accept your ideas. It helps wonder-: fully in writing business letters—enables you to write sales letters that amaze everyone by the big orders they pull in. Then again it helps in social life. Interesting and convincing talk is the basis of social success. At social affairs you'll always find that the convincing talker is the centre of attraction, and that people go out of their way to ‘‘make up” to him. _ Talk convincingly and no man—no matter who he is—will ever treat you with cold, unresponsive indif- ference. Instead, you'll instantly get under his skin, make his heart glow and set fire to his enthusiasm. Talk convincingly and any man—even a stranger— will treat you like an old pal and will literally take the shirt off his back to please you. You can get anything you want if you know how to talk convincingly. You've noticed that in business, ability alone won’t get you much. Many a man of real ability, who cannot express himself well, is often outdistanced by aman of mediocre ability who knows how to talk convincingly. There’s no getting away from it, to get ahead—merely to hold your own—to get what your ability entitles you to, you've got to know how to talk convincingly! HE method Preston told me about is Dr. Law's ‘‘Mastery of Speech,’’ published by the Inde- pendent Corporation. Sttch confidence have the publishers in the ability of Dr. Law’s method to make you a convincing talker that they will gladly send it to you wholly on approval. You needn’t send any money—notacent. Merely mail the coupon, or write a letter, and the complete Course ‘‘Mastery of Speech,” will be sent you by re- turn mail, all charges prepaid. If you are not entirely satisfied with it, send it back any time within five days after you receive it and you will owe nothing. But if it pleases you, as it has pleased thousands of others, then send only five dollars in full payment. You take no risk. You have everything to gain and nothing to lose. So mail the coupon now before this remarkable offer is withdrawn. Independent Corporation Publishers of the Independent Weekly Dept. L-7711 119'W. 40th St. New York Please send me Dr. Frederick Houk Law’s ‘Mastery of Speech,” a Course in Business Talking and Public Speaking in eight lessons. 1 will either remail the Course to you within five days after its receipt, © send you $5 in full payment of the Course. ‘ Beleace . : | : 50 . 50 , 54 , t , 58 , 62 83 4 , 74 79 ES , 30 . 30 », 30 pany. 52.00. sents. news- m the a Bren- e the te of act er at r ghted dent; City : /
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fi Mechanical Drafting EARN $35 TO $100 A WEEK “Get into the profession of big pay and Rapid Advancement with the help of the school that has started hundreds on the Road to Success. I am ready to help you.” Home in Spare Time You don’t have to stop work or leave home in order to become a trained Draftsman. Through our practical Home Study Train- ing we teach you in your own home, and enable you to qual- ify as a practical Draftsman. No Previous Training Required Owing to the comprehensive nature of our course, you need no pre- vious training in the subject. Though you have never done any kind of draw- - ing before, you can become a thorough Draftsman by following our instruc- tions. Can Learn in Short Time by Our Methods Our course can be mastered in six to ten months. The reason for this is that we eliminate unnecessary theoretical work and concentrate upon the PRAC- TICAL problems such as confront the professional Draftsman. We do not re- quire you to spend months of your time on “preliminary” work, but start you on REAL DRAFTING at once. That is one reason why our students ‘‘make good” so readily. . Our Graduates Get to the Top The universal success of our graduates as Professional Draftsmen, many of whom have advanced rapidly to positions of ief Draftsmen, is evidence of the REAL VALUE of the training given by the COLUMBIA SCHOOL OF DRAFTING. Large numbers of our students have se- cured excellent positions even before com- pleting their courses. We cooper: ate with our students and graduates in securing desirable positions, which has been easy for us owing to the many de- mands upon us to supply our “product” for these positions. Draftsmen Get $35 to $100 a Week Our graduates have shown their ability to reach high salaries RAPIDLY, owing to their practical secure ex- cellent salaries AT THE START, as high as$2,000a year. The usual pay of Drafts- men is $35 to $100 a week. —Roy C. Claflin, President COLUMBIA SCHOOL OF DRAFTING The Demand is Greater than the Supply The demand for properly trained. Drafts- men has always been greater than the sup- ly, but this is more so today than ever Ciees, owing to greatly increased con- struction and mechanical development. The Draftsman is an essential connecting link in all engineering work. This great demand is indicated by the long lists of want ads for Draftsmen in the daily papers, especially those of industrial centers. Not Merely a Correspondence School The COLUMBIA SCHOOL OF DRAFTING not only trains Dra‘tsmen by mail but is a large local institution of the highest standing. For many years it has been the leader in SPECIALIZING on the teaching of DRAFTING. This is an obviousadvantage over teaching Draft- ing only as a side issue. Drawing Outfit Furnished We supply all our students with a draft- ing outfit for use throughout the course. ere isno extra charge for this, and it becomes your personal property when the course has been paid for in full. Book of Particulars Sent Free If you are interested in becoming a prac- tical Draftsman through the training of the COLUMBIA SCHOOL OF DRAFTING, whereby you can enter a Profession in which your services will always be in de- mand, you are invited to write us for our free book of particulars, which describes our school and methods. (We employ no solicitors.) For your convenience you can fill out and ----Mail This Coupon To-day- ---- Columbia School of Drafting 14th and T Sts., N. W., Dept. 1067 Washington, D. C. Without obligation to me, please send me full { ‘ of your practical home study training : n Drafting. ting City State..... oe DEC., 1919 Volume 95-No. 5 Page They Tour in Their Own “Pullman”........., 31 It Does Everything but Answer to ‘“‘Whoal”.., 55 If Automobile Tires Could Talk 64 NATURAL SCIENCE This Strange Object [s a Snail’s Tongue......, 26 Wind Tricks the Skyscrapers Play..........., 3 Bringing the Stars to the People............, +s Its Own Temperature Regulator............. 47 Putting the Spinning-Top to Work.........., 48 Birds that Walk Like Men................., 63 Electricity Direct from Fuel..............°.. 16 A Metal which Bends when Heated.......... 76 PICTORIAL PAGES Fishing for Money on Broadway....... er 32 And So They Were Married. ............... 33 Would We ‘Were a-Kangaroo!l. .............. Accessories that Mark Automotive Progress .. 56 Do We Talk Too Much? Look at This Record! 67 Getting the Dope Across.... ....... 71 Do It with Tools and Machines............. . Housekeeping Made Easy.............. 73 RADIO-TELEGRAPHY AND -TELEPHONY Working with Artificial Lightning............. 130 Important Papers Read at Radio Meeting..... 136 Navy Broadcasts Information to Benefit Ama- Aero Radio-Surveying and Mapping..... a Home-made Variable Condensers .. ....... 140 A Simple, Renewable ‘‘B’’ Battery for Vacuum A Buzzer Set that Uses Little Current........, 143 Radio Calculators—Check" this Value of 14al SHIPS AND SHIPBUILDING Shades of the 23} When the ‘Graf Waldersee” Rammed the “Re- Launched, Eng Installed and Steam Up.... 86: For a Dark and Stormy Night on the Ocean... 86. SPORTS AND PASTIMES How He Irons His Prints. 34] A Drying Reel to Save Your Lines........... 38: “See, Ladies and Gentlemen, I Have Nothing Up MISCELLANY Multiplying the Power of Your Arm.......... 23 Ride a Bicycle while You Grind.............. 22 Heating, Cooling and Cleaning the Air........ 23 Bundle Up the Milk to Keep It Cold.......... 23 Linking Glasses and Ear-Trumpets Together... 23 Take Your Bathtub with You............... 23 For He Is an Englishman .................:> 24 How They Bag the Orange................-> 24 A Concrete Illustration. Every Cigarette Its Own Match.............. 25. (Continued on page 7) | | onth! | | |
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New Oliver Typewriters At About Half Price Latest Model Number Nine Save $43 By This New Plan—Be Your Own Salesman The Guarantee of a $2,000,000 Concern That This $57 Typewriter Was $100 During the war we learned that it was unnecessary to have great numbers of traveling salesmen and numerous, expensive branch houses throughout the country. We were also able to discontinue many other superfluous, costly sales methods. You benefit by these savings. The $57 Oliver is the identical machine that was formerly $100. Not one change has been made in design or materials. Each machine is a new Oliver— our latest and finest product. The $100 Model The Oliver Nine is the finest, the costliest, the most successful model we ever built. If any typewriter is worth $100, it is this handsome machine, the greatest Oliver triumph. Over 700,000 have been sold. This is the same commercial machine used by the U.S. Steel Corpora- tion, the Standard Oil Company, the National City Bank of New York, Montgomery Ward & Co., the Pennsylvania Railroad, and a host of others. Any operator can use the Oliver. Free Trial; No Money Down Here is our plan: We ship an Oliver Nine to you for five days free trial. No money down—no C.O.D. Use it in your office or at home. Try it—without anyone to influence you. If you want to keep it, send us $3 per month. If you want to send it back, we even refund the out-going transportation charges. That is the entire plan. You are the sole judge. At no time during the trial are you under the slightest obligation to buy. Superiority and economy alone must convince you. Amazing Facts We have just published a startling book entitled “The High Cost of Typewriters—The Reason and the Remedy,” which reveals the inside history of the typewriter world—old cu toms of selling—secrets never before divulged—all about price inflation—subsidies, etc. All the follies of $100 pricing are exposed. Readers are astounded. Mail the coupon now. You will be surprised. This book tells everything. With it we send our catalog, free trial order blanks, etc. After r ading it you may order a free-trial Oliver. Canadian Price, $72 The Oliver Typewriter Company 97.02 1108 Oliver Typewriter Bldg., Chicago, Ill, THE OLIVER TYPEWRITER CO, 1108 Oliver Typewriter Bldg., Chicago, III. oOo Ship me a new Oliver Nine for five days free inspection. If 1 keep it, I will pay $57 at the rate of $3 per month. The title to remain in you until fully paid for. This does not place me under any obligation to buy. If I choosé to ~—_ the Oliver, I will ship it back at your expense at the end of ve days. O Do not send a machine until I order it. Mail me your book “The High Costof Typewriters — The Reason and the Remedy,” your de luxe catalog and further information. Cocupation Or qee | | “4 47 “a 63 16 32 33 : é 56 6 73 NY 130 137 i 138 140 4 : 140 , 144) 23) 62. FREE - 38: 7 | 22
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Book Bargains Finish This Story For Yourseif— The girl got $6a week and was lonely. “Piggy” —you can imagine his kind— was waiting down- stairs. He knew where champagne and music could be Kitchener's doing. But. another night? 0. Henry (12 Volumes) tells about it in this story, with that full knowl- ge of women, with that frank facing of sex, and that clean mind that. has endeared him to the men and women of the land. To Those Who Are Quick JACK LONDON vas. Given Away Never was there an offer like this. Not only do you get your 274 O. Henry stories in 12 volumes at less than others paid for one volume of the first edition, but you get Jack London’s Works, 5 hand- some volumes—without paying a cent. You get 17 volumes, packed with love and laughter—a big shelf full of handsome books. SHIPPED ON APPROVAL We will ship the two complete sets so that you can look them over in your home and then decide whether or not you wish to buy If you are not delighted with O Henry and the free Jack London notify us and we will take the eets back as cheerfully as we sent them. How could any proposition be more fair? INSPECTION COUPO THE RIVERSIDE PUBLISHING CO. $43 a Bidg., Chicago, Wi. Please ship on approval the Works of O. Henry, 12 volumes, half leather er binding go gold Also the 5 volume set of Jack jondon bound in silk cloth If I keep the books I will pay you $1.00 54 payment within 10 days after books are received (PSM 11-19) shipping instructions as offered readers of P Ridpath’s HISTORY of the WORLD AT A BARGAIN Nine Bic Vols. 4000 Pages 2000 Pictures We will name our Bargain Price and easy terms of payment and mail free our 32 beautiful semple paves to - all readers interested. A coupon for your convenience is printed at the bottom of this advertisement Tear off the coupon, write name and address plainly and mail now before you forget it These sets are brand new, beautifully bound in new Fabrikoid binding. This is ro ef last opportunity to buy before the price —< it tree f Ridpath’ ory © ost other cha of N leon, me particulars of your special Dodge’s Telegraph and Wireless Institute LEARN WIRELESS TELEGRAPHy Fascinating and Educational Work—Big Salaries—Prepare Now The United States Shipping Board is making heavy demands uponsforDodge-trained wireless oper. ators. Travel all over the world, secure, free, unsurpassed living accommodations and earn abigsalary, We Also Teach Morse (Wire) Telegraphy and Railway Accounting School established 45 years. Endorsed by wireless, railway and telegraph offi rates. Students can earn veg expenses while attending school Catalog Free. Write rosy” Oth St. Valparaiso, Indiana LEARN MUSIC WITHOUT ared by 225,000 seven years old to soventy., have learne 1 through these sim oy lessons. Many have _— new method succeeds even after old smetheds of personal instruction fail. Entire course on trial---you to be the judge and jury; averages only afew cents a week if satisfied and nothing whatever if not, Free book shows how pieale ons and easy it is and pas full information. introductory offer if answer at once, ri then ju for oursaif. No obligation, ize U. S. SCHOOL OF MUSIC 811 Brunswick Bldg. New York City The Key To Success The secret of busi- ness and social suc- cess is the ability to remember. I can feet, address an audience. Easy. Simple. The result of 20 years’ experience de- veloping memories of thousands.. Prof. Write Today {2 for free wo ted Memory Test nine hows Principal books“ How To Coosk in ncipa Profits In Mushrooms Anybody can add $20 to $40 per week to their income, in spare time, entire year growing mushrooms in cellars, sheds, barns, boxes, etc. I tell you where to sell, at highest prices. Free Illustrated Instrittion Booklet HIRAM BARTON Dept. 3, 329 W. 48th St., New York | How To Make Wireless [nstruments A little book that fully describes the construction of spark wireless instruments and apparatus. lust the thing for the amateur. Illustrated. Price, 25 cents postpaid. POPULAR SCIENCE MONTHLY 225 WEST 39th ST., Book Dept. NEW YORK CITY 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 Write for FREE 64-page catalog THE NEW YORK ELECTRICAL SCHOOL 40 West 17th Street, New York City Learn Electricity 3%MONTHS No need of taking from 1 to 4 years at America’s greatest prac- tical institution. Finest equip- ment. Nobooks. No ¢ All individual instruction. No special education necessary. Day and evening school. Cpen all year, Enter any time. Earn while you learn. Also courses in Drafting, Plumbing and Motion Picture Operating Send for free book-‘now, Be sure to state which course interests you, TRADE ENGINEERING SCHOOL 39-51 E. Illinois St., Chicago, Ill. LANGUAGES LEARNED ON ALL PHONOGRAPHS **Like learning a tune—and aseasy '’ Our disc Records repeat the correct accent and pronunciation until you knowit. Family and friends enjoy language study by the LANGUAGE PHONE METHOD and Rosenthal’s Practical Linguistry The war has created unlimited opportunity. Pre- wd now to better your position, or increase your usiness, Brush up on the langia studied at school. Write for Booklet and Free rial Offer. SPANISH. FRENCH ITALIAN ETC. THE LANGUAGE PHONE METHOD 946 Putnam Bidg. 2 W. 45th St.. N.Y. Learn e develops ability and original- guarantee ‘and Free Ou OF LETTERING. S31 S.L. Bidg. Detroit, Mich. DO YOU LIKETO DRAW? Cartoonists are well paid We will not give you any grand prize if you answer thisad. Nor will we claim to make you rich ina week. But if you are anxious to develop your talent with a suc- cessful cartoonist, soyoucanmake money, send a copy of this picture, with 6 cents in stamps for portfolio of eartoons sample lesson plate, and let us explain. STAMMER If you stammer attend no stammering school till you get my big new FREE book and special rate. Largest and most successful school in the world curing all forms of defective speech by advanced natural method. Write today. North-Western School for Stammerers, Inc., 2335 Grand Avenue Milwaukee, Wis. Right no our opportunity to ty to pet int into the greatest industry the World has ever acon pf anh everywhere attractive new field. Never before have ambitious cae had such a e.. Coupon at once—find out h: how our wonderful Course in Practical Aeronautics will give you the wledge to enter this new new field. Learn at home by mail during your spare time. FREE BOOK COUPON Enormous Demand for Men-Big Pay Prepare NO w —- for these positions Bt, Aeronautical Instructor Gentlemen: Please send pay particulars ical Con your new Repairman | Mechanic Salesman Assembler Builder Thousands of new i Bile | : mbone, Guitar, or Singing, all by note. Don’t even need to know one note from another to begin. 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CONTENT S— Continued Page Make a Noise Like a Ferret... 25 Peel Off a Stamp from Your Roll..........--- 25 In Again, Out Again........+-e-eeeseeeeeeee 25 Mow to Keep Her Cackling.......------++--- 26 Saving the Fly from a Milky Grave.......... 26 An Office Built for Two .. ...----eeeeeeeeee 26 Proving that You Are Who Better Let the Shoemaker Footprint = 28 The White Ants of Siam Against Germany. ... 28 Helping Budding Virtuosos.............+.- Rounding Up the Elephants.........----.--- 36 How to Fight a Burglar. .........-------+++ 36 The Hillside Document Vault............-- Three Black Men; See How They Climb. ...5.. 37 A Hard Life While It Lasts.........-...... oe Sutking Up the Sediment in the Swimming Pool 37 Fashion Note. 37 Shielding the Welder’s Head................. 39 Science Applied to Wedding Rings............ 42 Give Him a Helping Plate. ...... 50 Did You Blow Out the Gas?................. 50 Cutting Steps in the Skyscraper.............. 51 New Bristles After Each Shave.............. 54 That Old Worn-Out Hat. 58 Crutches with Springs in Them.............. 58 Tracing Colors on Glass. 66 The Death That Lurks in Dope.:............ 68 Welding with the Electric Arc............... 78 Three Layer Suits for Winter............... 78 The Hammer You Wield with Your Foot..... 82 What Will You Have Today, Sir?............ 82 . An Electric Power-House for Your Pockst..... 83 This Machine Saws Through a Thick Propeller PRACTICAL WORKERS Making the Machinist Mere Efficient....... a0 OF Preserving the Shape of Stored Tires.......... * 90 Obtaining Longer Life from Grass Rugs....... 90 The Warping of Aircraft Propellers and How It 92 A New Method of Broaching Keyways........ 96 An Artist's Combination Easel and Work-Table 96 Adjust the Radiator Curtain Without GettingOut 98 Drive Machinery with Your Motorcycle ....... 100 Make a Water Circulator for Your Ford....... 102 Make Your Own Lead Gaskets............... 105 A Toy Electric Signal for Miniature Trains..... 106 Making a Combination of the Level and Door- Things You Ought to Know About a Roof Before How to Change the Liquids in Two Glasses.... 110 Repairing a Gearcase Break with Babbitt..... a 816 How to Make a T-Square Stay Put...... Wee | $5,000 in Scholarships...... ate 112 Improvising an Emergency Stencil-Brush...... 114 Make These Scales and Save Fifty Dollars..... 114 How to Make a Profile Marker.............. 116 Changing a Wood-Stove into an Oil-Burner.... 116 An Old Bottle Made into an Acetylene Lamp.. 117 Locating the Light Switch in a Dark Room.... 118 A Safety First Belt Shift for a Grinder........ 118 Keeping the Houn’-Dawg Out of the Garbage How to Take the Dents Out of Mudguards.... 119 Ride Around in a Chariot while You Scrub.... 120 Change Your Old Bottles into Drinking Glasses 120 Mend That Loose Hammer-Head with Cement. 121 Turnbuckles for Use on Model Airplanes...... 121 Equal in Holding Power to the Manufactured Anyone Can Make This Electric Water-Heater. . 122 Making.a Blow-Torch from an Old Generator. . 123 - To Drill Beyond the Depth of the Bit-Stick. wore N28 Silage-Carriers for Feeding Steers............. 124 Floating Clips for Films..................--. 124 A Moisture Separator for Garage Air Line..... 125 Two Ways to Keep an Engine Quiet.......... 126 Rest for the Arm-Weary at the Telephone ..... 128 Tests of the New Liberty Motor Fuel......... 128 Letter- and Bill-Files Made from Old Book:s.... 129 How to Use a Hairpin as a Switch Fuse........ 129 Getting There Ahead of Engine Troubles....... 145 The Hairpin Takes. to the Movies............. 146 Why Stay Awake to Call the Nurse?........... 147 Fixing a Key to Fool the Petty. Ties. ...66. 000 148 How to True Up a Hollow Oilstone....... 150 Here Is an Anti-Rattler for Tire Chains. . (No Extra Charge) Every student of the Chica- Tech” Home SStudy Course in Draftsmanship receives this draw- ing outfit—set of instruments in case, drawing board, T-square, triangles, scale, curve, drawing paper, pencils, etc., or a cash credit in case he already has an outfit. These instruments are of the same make and sizes as used by high salaried experts in drafting rooms of factories, shops, railroads, etc. You use them while learning—then take them right into your practical work. NOTE: Enrolled with Chicago e “Tech” you have the personal direction of practical engin- eers, builders and architects who teach you the methods they use in their own work. No useless theories, no time wasted. You are prepared to stand beside old, experience men. Big ad- vantage to learn from a staff like this —every man a specialist. Come To the College or TRAIN at HOME Wherever you are you can have this Chicago ‘‘Tech" training. Complete instruction by mail. Exercises, lessons, = direction of our experts right n your own home if you cannot come to the college for a resident course. Send the Coupon and get the facts. Drawing Outfit Auto and Gas Engine Course All about automobile mechanism y u train directly under the Chicago “Tech” automobile experts. Know How To Fix Troubles Most complete instruction in auto repair work. Equips you for high Pay or to start a business. Big de- Mand for trained repair men in every part of the country. Aeronautics Complete, practical instruction in Aeronautic Engineering. Construc- tion of every type of machine fully explained. This course equips you for expert work. Get the catalog and information. Send coupon. Every Big Construction Job Must Pass Through the Drafting Room Do you realize what that means in the way of opportunity with big pay for Draftsmen? Think of the enormous volume of building operations now going forward ali over the country with the return of peace— the big engineering, construction and manufac uring projects that must every one first go through the drafting room before the plans are ready for the workmen. aDrafisman Raise Your Income $25 to $100 a Week or More All you need is training to be ready to accept a call that should mean $25 to $100 or more a week easily earned. You have the same opportunity to secure the valuable trainin from the Chicago Technical College that many other men ha who are now holding fine through their knowledge of draftsmanship. Practical Training at Chicago ‘‘Tech”’ sitions and earning? big pay We train hundreds of men in the most modern methods—at the College or by mail—and see them quickly succeed, because we give them a technical preparation that not only makes proficient draftsmen of them, but also enables them to get into line tor the higher executive —, in big construction enterprises. Many of our most success- ul graduates took their training in spare time at home. Easy Payments The fees for Chicago “'Tech’’ courses are very moderate —and you can payon easy terms. And also—you can obtain in a few months what it would take several years to aquire by ordinary methods. You can get an early start. You are soon ready to take a paying position and to quickly get back the cost of your course. FRE TEST Other institutions ask you to y first—and then to find out ater how weil qualified you are for this profession. Wesend the free lesson first and place you under no obligation at all. Dis- cover your qualifications be- fore you pay anything. And see for yourself just what Chicago “Tech” offers you in training which will bring a ready market for your services and open opportu- nities which are closed to the untrained man. The coupon will bring all the facts about the course, the small fee, and the easy terms. NOW Mark with X the branch you are in- terested in—or if in doubt about which course to take, write a letter stating facts about yourself and asking our advice which will be freely given. Mail either the coupon or the letter today. CHICAGO TECHNICAL COLLEGE, 1131 Chicago ‘“‘Tech’’ Building, Chicago Without obligation upon: me, send your Catalog on subject indica’ below. Also FREE Lesson if inquiry is on Drafting or Plan Reading. Mark X opposite work in which you are especially interested. O Plan-Reading—Buildings O Plan-Reading—Shop Men O Estimating O Surveying O Autos and Gas Engines Aeronautics O Architectural Drafting O Machine Drafting O Electrical Drafting 0 Structural Drafting 0 Sheet Metal Drafting ‘DO Builders’ Course College or Home Study? State which...... ee } vin? = f = | _ | in ipa é — = prac- equip- = No l year, e you = ting, cture now, s you. DOL ords | you ythe iry Pre- your died ffer. / ; AY ine if SSS SSS a suc- SSS SS SS cen SSS and SSS SSS LES ST : SSS ~ / rate. ring tural | construction, operation and 3 N. N ; epairing the Firepot of an Old Stove......... 148 f, sos How Concrete Posts Should Be Made in Order to : | a4
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j The Famous Accounting Guide By R. H. MONTGOMERY, C. P. A. Ex-President of the American Association Public Accountants You May Examine It Free ‘‘Auditing: Theory and Practice” It is at once, the standard modern guide to the solution of auditing problems in general, and at the same time a volume of intense reading interest. This Well-Known Book will be found in practically every big accounting firm, in the offices of great corporations, on the desks of treasurers wherever important accounts are kept. Every compe- tent accountant and auditor is sup- posed to be thoroughly familiar with it. Shows Clearly How to Make Audits This all-inclusive guide goes directly to the heart of the essential features of an audit. It gives in specific, understandable, interesting chapters, the kind of direction you could otherwise gain only through years of trying experience and some of it perhaps never in that way. It lays down the foundation principles, shows how to begin work; gives fully and explicitly, the procedure for making both balance sheet and detailed audits, conducting investiga- tions, handling depreciation, preparing certificates and reports. Settles Doubtful Matters Almost Instantly In general accounting work its 800 pages |. are a veritable accounting encyclopedia packed with exact, experience-tested facts. Hardly a situation can arise where you cannot turn to your copy of “Auditing” for practical suggestions on what to do, how to Save time, avoid unnecessary work, and distinguish the vital from the incidental. Insures Exact Financial Statements In preparing important financial state- ments, where you must be sure you're right, Mr. Montgomery’s judgment and experience are simply invaluable. 40 Different Lines of Business from department stores to banks and public utilities are covered. Its eminent common- gense is of great actual work-a-day value to the professional, while, it is positive ac- . counting “nourishment” for the student. It is a veritable ‘‘tool-chest”’ of accountancy. The Whole Subject in a ‘*‘Nutshell”’ Toany man who is consi ering the study of accountancy, it gives at little cost, an organized mastery of the subject from be- ginning to end. Accountants and auditors in all lines of business in every state join in enthusiastic praise of Mr. Montgomery’s work. “Just what I’ve been look'ng for. No accountant should be without it,” writes A. R. Cochran, Spence Baggs Store Co., Ohio. ‘‘Wouldn’t part wit my copy for many times its cost.’"—D. S. Fills, C.P.A., North Carolina. ‘‘Couldn’t be more com- plete.”—P. L. Louks, Detroit. ‘‘Have just taken five copies.’"—Charles Neville & Co., Savannah, Birmingham, etc. ‘‘More than a book—an institution,” —H. K. W Scott, Minnesota. Packed With Facts Every Accountant Needs The five principles of balance sheet audits. 13 rules for verifying inventories. The different business customs in figuring interest. The best way to treat a profit on the sale of fixed assets of a concern. Where to find 5% of defalcations. The 18 rules for partnership agreements. A safe definition of ‘‘surplus."’ How to start a perpetual inventory of stock on hand. The right place on the balance sheet to show re- serve for working capital. How to locate errors. Profit and loss accounts for holding companies. Three good rules for business concerns to follow in borrowing money. Should inventories be valued at cost or market? Handling treasury stock in the books. Profits: Legal and accountants definitions. The best form for balance sheets. ° Points about statements for credit managers. What you should know about depreciation. What not to put into a report. Data for retail and department store accountants. Points about financing by acceptances. Examine It FREE Send No Money—Book Must Satisfy You First. Before you pay a cent for ‘Auditing.’ we want you to examine it from cover SiN tocover. This 800-page book, @) A) bound in Full Limp Leather of CY \) High Quality will be sent you NAL without deposit of any kind. Judge for yourself its great value. Just fill out the coupon. THE RONALD PRESS CO. Dept. 130, 20 Vesey Street, New York City - In accordance with your offer, send me a copy of Montgomery’s ‘‘Auditing.”’ After five days examination. I agree to either remit the price, $6.00, or return the book to you. once i free of ch: le Fall usiness irm or ommon education questions, list of other U. Government ti Address LIFE JOB Address... ... K 110 What becomes of the Law Graduates? nce verned by certain | “cashes Come. iness Law courses. AMERICAN SCHOOL OF CORRESPONDENCE Dept. 1758 Chicago TRAINING-THE KEY TO SUCCESS Explain how I can quali for the position checked” eBusiness Manager. __...... utomohi inex Public Accountant ...... Steam En rineer eneral Education _...... Electrical Engineer .-High School Graduate __......Mechanical Engineer .Architect «Civil Engineer ..Western Union Courses ......Shop Superintendent Telephone Engineer __..... Accountant and Auditor Airplane Mechanic Bookkeeper Fire Insurance Expert _......Stenographer Sanitary School Branches. onl Heating and Ventilating ......Electric Light and Power Engineer Superintendent Name Address Comics cartoons. com- mercial newspaper and Magazine illustrating, Pastel crayon portraite and Fashions. Earn $26 to $200 a week. Ly our simple method your talent is quickly de- veloped without interfering with present work. By Mail or Local Classes. he largest prac:ical art School in the world. \\rite for full particulars and list of successful pupils illustrated prospectus, ete ndorsed by news- Papers and magazines. ASSOCIATED ART STUDIOS, SSD, Flatiron Building, New York. V.¥, EASIEST SHORTHAND 5 notes at lectures, meetings; keep confidential diary. Big help in commercial schools; by public and private stenogra- phers, teach Hi: Learn Watch Repairing Be a watchmaker—you can iecarn this profitable trade by correspondence in a few weeks in your own home by the DeSelms Chart System After youcomplete £ the course you will know a watch from AtoZ. You THE DeSELMS WATCH SCHOOL “ted 687 Perry St., ATTICA, IND. TEACH player atone me, Dr Quinn's famous ritten Method is endorsed by leading Conservatories. W.L. QUINN CONSERVATORY Studio ZK, Social Union Bidg., Boston, Mass. Wanted! 100 FIRST Franklin Insitute Dept. K110 : ROCHESTER, N. Y. Sirs:—Send me at YEAR Fall Examinations & i] het Law Help Law will increase your | OU you business makes those who emp oy you aware of that fact. There is nothing to stop you trom getting the law training that wiil help you forge ahead if you Sp | “it a : will devote bot a part of your spare time to reading i} “4 the A 4 } then acquire speed with K | Short- hand Amazingly simple, easy. Ap- Mara, afterbrief, pleasantpractice, Favor- it | Brochure with Testimonials free. postpaid. Address : 2 | H KINGINSTITUTE, EH-188 Station F NEW YORK CITV | ; will know just what the matter is and how to repair | oe, one. When you graduate you will be a practical ¥ Lg watchmaker end repairer and competent to fill inv position sitions for our or: | | 1 won World's Fir t Prize for best course in Penmansiip. Under mv guidance you can a Become an expert penman. Am placing many of ad Mle iam students as instructors in commercial colleges at hig La salaries. If you wish to become a better penman, write eee | me. I will send you FREE one of my Favorite Pens 3 and a copy of the Ransomerian Journal Write tuday. C. W. RANSOM, 488 Essex Bidg., Kansas City. Mo. - FREE BOOK 41 This Interesting Free Book shows how you can become a skille« musicians and heads of State c | H , Play chords at once and complete piece in every key, within 4les- sons. Scientific yet easy to understand Fully illustrated. For begin- ~ ners or teachers, old or young. All music free. Diploma granted Write today for 64-page free book ‘*How to Study Music’’. — 33 MAIL CLERKS 4 | H reo s | s ; oe | H
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Captain Floorwalking There are thousands of men like Cap- tain Smith. who, before the war, were oc- cupying relatively unimportant positions in the business world. Then, in a few months after the call to colors, they were holding commissions in the army. Millions of others found their way from positions in all walks of life into the various camps, where intensive training quickly turned a nation of business men into the world’s finest fighting machine. It almost seemed incredible— but what this array of busi- ness men and workers did as “their bit” is now history. What took Germany forty years to prepare for was done in a few months by America. This record was made possible only by INTENSIVE TRAINING. Though Captain Smith may return to his old job of floorwalker, it will be only for a short while — time enough to com- plete a course of intensive training in some line or other that will make him mentally fit for a better paid and more responsible position. He knows that in- tensive training will do this for him just as surely as it qualified him for a com- mission in the army. Intensive training made him a leader of men. It enabled him to give orders instead of taking them. It enabled him to think, act and reason for himself and do the thinking for those under him— often a matter of life and death. No! Captain Smith couldn’t be content in his old job, because he knows how to get a better one. The War’s Great Lesson _ Every man who stepped from his job in civil life into an intensive training camp has learned a val- uable lesson—a lesson that will make him a better business man if he but has the will to win. These men have witnessed the wonders of intensive training—have seen the metamorphosis in their own individual lives as well as in those of others, and it is but natural to assume that, if intensive training in military matters performed such won- ders, it must have the same beneficial effect when gee to business. The history of business and business successes points unerringly to the assistance rendered by intensive training. , Since the armistice was signed, and more par- ticularly sincethe American to arrive home, there has been a noticeable increase in the number of enrollments for intensive business train- ingin all lines of endeavor taught by the American School. Thousands of men who were simply “get- ting by” instead of “getting on” before they joined the colors, have learned a lesson and they are not foing to be content with the pa jobs they held inthe past. This fact is prove increase in students who are availing themselves American School training. In a few months ese students who are now applying intensive .as a solution of “how to get on,” will be by the great - After seeing what a few months of in- tensive training did for him from a military standpoint, he, and thousands like him, are going to avail themselves of the same method as a means of self- betterment in business life. There’s proof below that it’s the only way to secure promotion and much better pay. able to qualify for the goal they have in mind. The spare time hours they devote to this training will bring them rich re- wards in the form of bigger pay checks, better positions and more congenial work. The result of such training cannot be otherwise, for trained men are the scarcest commodity on the market. An Investment Without an Equal If you think for a moment that there is another investment that can equal the time and small amount of money spent in intensive training— get out your pencil and do some figuring. If a course of intensive training in your chosen line costs you from $50 to $100 — and your spare time—how much would that money earn for you if invested in stock? From three to ten dollars per year would be the limit, wouldn’t it? The same amount invested in intensive training will double, treble or multiply your earning power several times, because it makes you a better busi- ness man and makes those who employ you aware of that fact. There’s no sentiment in determining salaries. You get paid for what you can do—and that depends solely on what you know. Your spare time does not earn you anything OW-—so you can’t charge anything to a course of intensive business training but the actual cost of the course. If the result of this training only increased earning power by ten dollars a week— and that is a conserva- tive would net FIVE HUNDRED AND TWENTY DOLLARS a year from a small investment of cash and spare time. That is a small gain when compared with actual returns reported y American School students, but small as it is it serves to prove that there is no other investment in the world that pays so well as a trained brain. Thousands Bettered by American School Training It has been the privilege of the American School, a fully chartered educational institution, to pre- pare thousands of ambitious people for better posi- tions in all trades and professions. For nearly a quarter-century it has been advocating intensive training. and, today, there are thousands to testify to its efficacy—thousands who are now enjoying healthy incomes and congenial work as a result of the spare time they devoted to American School training. The same measure of success can be yours. Proof of scores of these successes will gladly be mailed you on request. A School That Is Known by Its Guarantee The American School believes that edu- cation, like merchandise, should be sold on a “make good” basis. Doing business strictly by mail demands some guarantee as a protection to the student. That is the belief of the American School — and it is on the basis of SATISFACTION OR MONEY REFUNDED that a student enrolls. All risk on the part of the student is eliminated. At anytime during the first year of your enrollment we guarantee to refund your money in full if, after the completion of ten ex- | aminations, you notify the School that you are not satisfied with your course. Ten examinations will prove to you whether or not you are getting prac- tical, money-making training. You are the judge. Don’t Dodge a Better Job Whether you get a better position and better e is up to you you alone. The American ool can help you get the position you want — just as it has helped its thousands of students. It will not obligate you to investigate what this training means to you. A Free Bulletin will be mailed you on receipt of the coupon. No agents will call on you—and it might prove the best thing you ever did, Check and the coupon while this matter is before you. American School of Correspondence Dept. G 758 Chicago, U.S. A. TRAINING=THE KEY, TO SUCCESS Explain how I can ay At for the position checked. Electrical Engineer ay Electric Light and Power ......Certified Pub. Ace’nt Superintendent ceountant and Auditor Hydroelectric Engineer okkeeper seca Telephone Engineer tenographer Engineer ......Mire Insurance Expert Wireless Operator Sanitary Engineer Architect Plumber Building Contractor __...... Heating and Ventilating . «Civil Engineer Engineer Structural Engineer ......Automobile Engineer Mechanical Engineer ......Automobile Repairman .....Shop Superintendent _....... Airplane Mechanic Steam Engineer "High School Graduate and Designer _...... Gen’! Education Courses La ++...Common School Branches Name | COINS, AY 4 raite your | : o! : : nt ‘ : |
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| Rate 20 Cents a Word, payable in advance. Hil Advertisements for January issue should be received by November 20 AUTOMOBILES AND ACCESSORIES TIRES double tread guaranteed for good service. Big strong 30x3 tire, $6.25; 30x3!5, $7.75; 32x3 +4, $8.75; 33x4, $10.25: 34x4, $10.75; 35x4!5, $12. We also carry a good line of new tires and tubes. 5000 30x3'¢ non-skid guaran- teed 5000-mile tires on hand at$13. Big saving on all other sizes. Special discount & dealers; 20% deposit required on all C.O. D. orders. Write for list now! M. Liben & Com- pany, 793 7th Avenue, New York. ° HYDRONIZER: - Insures clean plugs, consumes carbon, saves gasoline, intensifies power and increases speed. For all cars. Money back guarantee. Big profits for agents. Free literature. Friestedt Manufacturing Company, 2933 West Lake Street, Chicago. MORE Power, less fuel, no carbon. No mysterv, plain facts, results guaranteed. Write for booklet. No-Leak-O Piston Ring Company, Baltimore, Maryland. “ PATENTS—Write for our Free Illustrated Guide Book, “How to Obtain a Patent." Send model or sketch and description of invention for our opinion of its patentable nature. Highest references. Prompt service. Reasonable terms. Victor J. Evans & Company, 189 Ninth, Washing- ton, D.C. “MOTOR ANNUAL, 1920,” describes more than 400 new devices and accessories and gives scores of practical ideas to the automobile owner, manufacturer, dealer and ma- chanic. The biggest book of its kind ever published for 35 cents. Edition limited to 100,000. Send thirty-five cents and be sure of getting a copy. Out Janvary 1, 1920. Popular Science Monthly, 225 West 39th Street, New York. ELECTRICAL MOTORCYCLES, BICYCLES, SUPPLIgs SELENIUM Cells—highly sensitive and quick-acting; suitable for all experiments, from five dollars up. Baby cells, ‘4 x 4 inch, also very sensitive, only one dollar. Write ed cane, Selenium’ Laboratories, Good Ground, Long sland. ILLUSTRATED catalog just issued. Generators, motors. sockets, wire, switches, porcelain material. Hyre Electric Company 629 PD South Dearborn Street, Chicago. MOTORCYCLES all makes, $25.00 up. at big reduction. Second hand, $8.00 up Motor syaes attachments. Cycle motors. Smith motor wheels, 20.00 uo. New parts to fit all makes carried in = Second hand parts good as new 50% discount. Ex repairing, on magnetos, generators, transmissions M wid overhauled $10.00 up. Henderson motors our 3s Write for big bargain bulletin. Ameri oT Ons Company, Dept. 3, Chicago. BLUEPRINTS, 236 A. C. motor connections, with changes of voltage, cycles, etc. 123 D. C. motor connec- tions. Auto, or large motor use. Transformer con- nections. 10 samples, . C. motor-transformer, 25c. Write Charles Chittenden, 811 West Eighteenth, Kansas City, Missouri. ELECTRICIANS, Wiremen, Linemen, send your name and address for descriptive literature, of our Modern Blue Print Chart Method of Electrical Wiring. Over 350 practical diagrams. Electrical Wiring Diagram Com- pany, Box B173, Altoona, Pennsylvania.. MAKE Dry Batteries. Simple, practical instructions, = blue print, 25 cents. Dirigo Sales Company, Bath, aine. CUMULATIVE EVIDENCE ENORMOUS demand: Sell Tankii; Modern auto-fuel 100 to 200% profit.—‘‘Vapor-Spray"’ system burns water. Adds tremendous power. Tankli, Cleveland, Ohio. VULCANIZE on Anderson's Famous Vulcanizer. See our advertisement, page 118. INSYDE Tyres, inner armor for automobile tires, double mileage and prevent punctures and blowouts. ckly applied. Cost little. Demand tremendous. Profits un- limited. Details free. American Automobile Accessories Co., Dept. F3, Cincinnati, Chio. TIRES at Wholesale—Send for prices on 4,000-mile guaranteed tires and tubes. We_.have the cheapest, high- grade, long life and reliable tires in the world. Write us be- fore vou buy. Overton Rubber Company,’ Oelwein, Iowa - VULCANIZING auto tires is a growing and profitable business. Easy to learn. Instruction book, $1. Plants $50 to $300. Detailsfree, Equipment Co., 302 8th Street, Cincinnati, Ohio. INSYDE ‘Tyres, inner armor for Automobile Tires, prevents punctures and double mileages of any tire. Liberal ofits. Details free. American Accessories Co., Dept. 7-A, Cincinnati, Ohio. AUTO Motors and Supplies—Buick, Franklin, Michigan, Eve-ett, Hudson, Chalmers. Both water and _ air-cooled motors, $40 each and up. Bosch Magnetos $15 each and up. Presto tanks, $5.00. Coils, carburetors, head lamps, horns, air-compressors, generators, starters, Write for bargain bulletin second hand auto accessories. Johnston, West End, Pittsburgh, Pennsylvania. TIRES. Factory-to-You Prices. Exclusive representa- tive wanted each locality to use and sell Mellinger Extra Ply Tires. Guarantee Bond 8000 Miles. Sample sections furnished. Mellinger Tire Company, 937 Oak Street, Kansas City, Missouri. AUTOMOBILE Parts for all cars—50% off manufactur- ers’ list price. Pistons, connecting rods, cam shafts, crank shafts, cylinders, axles and gears. Our new catalogue and Used Parts Bulletin now ready. Write for it today. Ser- vice and satisfaction guaranteed. Auto Parts Company, 4108 Olive Street, St. Louis, Missouri. - RETREAD Tire Molds are needed in every tire shop to make it complete. We are manufacturing the best and by far,the most complete and practical retreader on the market today. Before buying your molds get our new catalog and you will place vour order for Crescents. Thev are the only molds to do real retreading. We have a special price for a short time only. Crescent Machine Company, Hill & Forge Streets, Akron, Ohio. EQUIP your car with air brakes. Upon receipt of $2.00 1 will send you Blue Prints and full description of my Pat- ented Air Brake. R. E. Welch, 247 Auzerais Avenue, San Jose, California. ake DOUBLE mileage assured! Use _ self-cured blowout patches. They weld permanently to shoe, are extra strong, easily app! The outcome of year’s practice. Ben's Big Tire Shop, i B, 378-382 Queen's Boulevard, Winfield, Long Island. OUTSIDE Steel Shoes for reinforcing any automobile tire weakness. Selling in thousands. Agents wanted George Broughton, 165 Michigan Ave., Buffalo, New York | PORTABLE Garages, wood or steel, reasonable prices. Bona Fide Building Mfrs., 22 Borden Avenue, Long Island City. 75% Saved! Double Tread Tires. All sizes. Guaran- teed 4000 miles. Ford size, $5.50. quality Stan- FORD ACCESSORIES R Tire Pump for Fords. Can be made by any Ford owner from discarded parts. Serviceable and efficient. A Handy labor and time saver. Full instructions and drawings mailed, $1.50 (no stamps). Stoeckle Company, Box Al17, Belimore, New York “IN-TEN-SO” Ford Headlight Regulator Increases Head - lights 200 per cent while driving at low engine speed. Illumi- nates the road 200 ft. ahead—through fog anddust. Make your night-drivi safe and enjoyable. Easily attached. : Operates automatically. 100,000 satisfied Ford users, Only stical device on market. Sent prepaid on receipt of 1.50. Money refunded after ten day trial if not satisfac- tory. er “In-Ten-So” immediately. Why deliberately risk your life with unsafe headlights? Continental Auto Supply Co., Dept. M, Davenport, Iowa. (Agents wanted.) FORD Fan Grease Guard—-Prevents grease and oil splash- ing interior of hood, frame or motor; fits any Ford model; t on in a minute. Fifty Cents postpaid—or from your lealer or jobber. Agents wanted. American Valve Tool Mfg. Company, 354 West 50th Street, New York. FORDS start easy in cold weather. Will run 34 miles gallon on cheapest gasoline or half kerosene using our carburetors. Increased power styles for all motors: fan attach them vourself. Big profits to agents; money bar $1.00; $3.50 per lb. Used by U k guarantee; 30 days’ trial; Air Friction Carburetor pany, 500 Madison Street, Dayton, Ohio. — June 26, 1919. Popular Science Monthly, 225 West 39th Street, New York City. Gentlemen: We are entirely satisfied with. the results that Popular Science Monthly has given us and have se- curedconsiderable business through at. We believe that if we stopped advertising in your magazine, that: for another year or two. we would still continue to receive inquiries and business. This is due, we believe, to the fact that your sub- scribers retain the copies of the magazine in their files and when in need of work of certain classes, they refer to them. Yours very truly, CENTRAL MACHINE WorRKS. This explains what is meant by direct, profitable and CONTINUOUS results— the kind that keep coming in from previ- ous issues of months gone by—forgotten . by the advertiser, perha s, but not by the reader. And why? Just glance through a.copy of Popular Science Monthly and learn the answer. In its pages are so many really heloful, useful, valuable hints and suggestions, to say nothing of interesting and aut oritative articles by the world’s best equipped writers, that a copy of the magazine will be just as valuable a refer- ence in five years from now as it is at the present time. It is filed and preserved just as faithfully as an encyclopaedia. And that’s what it is to its readers! Too bad YOUR advertisement doesn’t appear in the last twelve issues. But you can use the next. twelve! Classified Advertising Manager POPULAR SCIENCE MONTHLY 225 West 39th Street New York City WELDING AND SOLDERING DON'T scrap alumicum parts. Save them, with So- Luminum. New, great ‘3-in-1'’ welding, brazing and sol- dering compound, stronger than aluminum—perfect sub- stitute for acetylene welding—'% time and cost. Use gaso- line torch or soldering iron. No flux. Booklet9. Sampie 4 nited States Army and Navy, indorsed by British Munitions Board. So-Luminum Manufacturing Company, 1790 Broadway, New York. Henderson Indian motorcycles; condition teed— $250.00. N 10.00 t ae -00 to $60.00. Ww, or bulletin. Charles A. Merkel, 214 Rochester, New York. WHY pay exorbitant prices for your moto; when you can secure them from us at 25% to 50% sane Rebuilt motorcycle and motors, magnetos, two and thre speed, all accessories at a big reduction. Motorcycle Party Manufacturing Company, Chicago, Illinois ; MOTORCYCLES—Buy now while pri ; “"Laree arge stock on hand. Harleys, Ind Popes, Reading-Standards and others: Tires and tubes at - “as ar! Bush Company, —— Pany, Newark, New NEW and used parts and accessories fi akes, State model for Circular PS. Bargains in wed meee cycles: get list MS. Jones, The Parts Man, Brockton, Massachusetts. uaranteed rebuilt motorcvcles—Hi $25.00 Up—G son, Indian, Harley-Davidson. 162 North AVIATION THAT. unassembled Ford or motorcycle airplane Teady, complete literature of either, 2c stamp. Lates motor or propeller catalogue, 4c each. Thousands of Government test standard turnbuckles at \% less than factory cost. Heath Airplane Company, Chicago. AIRPLANES—1 to 6 passenger; aeronautical m to 300 H.P. Lowest prices. State your needs. Seat lists “P. S.""_ Aero Exchange, 38 Park Row, New York, INVENTORS—Desiring information write Free Illustrated Guide Book, ‘“‘How to Obtain a Patents Send model or sketch of invention for our opinion of its atentable nature. Highest references. Prompt easonable terms. Victor J. Evans & Com { Ninth, Washington, D. C. THE American School of Aviation announces a new cor- respondence course in Mechanics of Aviation. A thorough training in practical aeronautics. American School of Avie ation, Dept. 1868, 431 South Dearborn Street, Chicago. THE Aerocar—Aviation type soeedster, developed along aeroplane lines and driven by an aeroplane propeller. Ag easily operated as a bicycle and capable of high speed, Parts inexpensive. Send 50c for construction plang, Aerocar Company, Racine, Wisconsin. WE Teach Flying—Motor Mechanics—Airplane Cone struction. Improved ground training devices. Overseag officers fiying instructors. Summer field, Ashburn: Winter field, Miami. Send for free catalogue. Moler Aviation School. 105 South Wells Street, Chicago. MANUFACTURING HAVE you an idea to develop, a machine to perfect, a product to be manufactured? Do you need special machin- ery to reduce the cost of your product or a first-class model built, tools, dies or any kind of machine work? If so, send us a card for our illustrated booklet for manufacturers and inventors. Central Machine Works, 1911 North 12th Street, St. Louis, Missouri. © Order: Special articles in metal, models, tools, velo § eveland Specialty anufactur Company, Searsdale Avenue, Cleveland, Ohio. specialties, 5 es. eta ucts anufacturing Company, 241 West 23rd Street, New York. 7 AMERICAN MADE’ TOYS AMERICAN Made Toys Wanted. An opportunity for homeworkers on small scale and manufacturers on scale. Unlimited quantities needed of Toy Soldiers, Army, Navy, Marines, Cannons, Machine Guns, Warships and other Toys and Novelties. Greatest chance for industrious people for independent business. Enormous demand and future in American Made Toys, all over United Sta’ Canada, Mexico and South America with over 50,000 Ii Cent stores and toy dealers.. This new American ind -stands out conspicuously. Factories are esta! ple trained, machineries made. Christmas Sets need n millions this year. The great hit for 1919 without any ———- We are buyers of these goods all year pa fixed prices. Attractive prices offered for painted govds, Experience or tools unnecessary. un and more made complete per hour. Casting form outfits from $3. up. If you mean business, send for booklet and informa- tion free. Toy Soldier Manufacturing Company, 32 Union Square, New York. TRADE SCHOOLS HILES' Watchmaking and Engraving School, the largest and best equipped school in the West. 717 Market Street, San Francisco, California. DUPLICATING DEVICES. WELDING Plants, $25.00 to $300.00. Designed for all purooses. Small cash payment, balance three io six months. Every mechanic or shop should have one. Welding Co., Omaha, U.S. A. BOATS AND LAUNCHES DARROW'’'S Steel Boats. Finished parts for patterns Catalogue, 78 models. F. H. Darrow, 604 Erie Street, Albion, Michigan Trial. Yo one. ooklet Free. J. V. Durkin & Reeves Company, Pittsburgh, Pennsylvania. WIRELESS FOR the amateur wireless man—The Radio Amateur, Marion, Lilinois. Seventy-five cents per year. | | — Hie | i= = = bulletin “A” free. Ash M | ii i : mie 2 i dard tires used. Cheapest on earth. Exclusive agencies ny), i open. Great opportunity. Don’t delay. Rubber Trad- z Sl | ing Company, 321B, East 33rd Street, Chicago, Illinois. | “MODERN” Duplicator—a Business Getter, $1.50 up. a | ‘ 50 to 75 copies from pen, i typewriter; no glue oF Co if
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1 il lo Amateur, MOTORS. ENGINES, MACHINERY and Generators from bankruptcy aad vers" Moto mee for all of current. Im- te delivery. - han ‘4 regular prices. See display Ad on e 1:6. ee ood est End, Pittsburgh, Pennsylvania. wi es, porcelain Hyre Co. Co., 629 MT South Dearborn St., Small Steam Engines snd jlers, aso- ax HLP. 3 Sets, (13 Sheets) Postpaid on ‘Gast stings for Stamp. Gas Co. 364 Monadnock Block, Chicag: Motor Co. 364 Monadnock Block, ~DIeage-_ DVERTISER: Ask today for a 2 a copy of the wgatscActin Advertising Rate Folder Tt contains really important facts which will prove Snaerenene and © valuable to you. It also tells ‘How You Can Use opular Science Monthly Profitably.”” You'd like to ie wouldn't you? Manager Classified Advertising, Popular Monthly, 225 West 39th Street, New York. just issued. Generators, PRINTING, ENGRAVING. MULTIGRAPHING CAMERAS. PHOTOGRAPHY, SUPPLIES GOOD | Printing at low prices, 1,000 good letterheads, envelopes, cards, billheads, labels, circulars, $2.50; samples free; catalogues, booklets and circulars our speciatty Ernest L. Fantus Co., 523 S. Dearborn St., Chicago. Il. MULTIGRAPH Letters build business. Most econom- lca]. and effective advertising. Printing Addressing. Low rates, careful work; service. ee Letter Company, 241 Fourth Avenue, New Yor LETTERHEADS $2 thousanc. Samples free. Quality Print Shop, Marietta, Ohio. ACTUAL Typewritten Letters, heading black, pay purple. 100, $2. 500 $2.50, 1,000, $4,00. 5,000, $13 rtus Letter Shop, 409° Chestnut Street, Milwaukee, mg MAIL us 15¢ Pp 2 size film for development and six velvet prints. d six negatives any size and 15c for six prints. Or y-a mas six negatives any size and 15c for six prints. Or send 35c for one 8x10 mounted enlargement. Prompt, perfect service. Roanoke Photo Finishing Co., 212 "Beli Avenue, Roanoke, Virginia SEND for our catalog No. 121 today. It’s the biggest bm bine in the photographic world. Look over its pages must send for this money caving catalog. nit t’s free. rop us a card today David Stern Company, “Value, Service, Satisfaction since 1885."" Chicago, Iliinois. 500 Two-Color Letterheads. $2.05. Samples free. Superior eet 1915 South Kedzie, Chicago. 5000 med Labe els, $1.50. Catalog. Irwin Wolf, Station “Philadelphia. JOHNSTON’S “Snow White’ fluid is most excellent for marking photo albums. It is equally — as aD opaque with pen, brush, or air brush. By return mail on al duty 4 H.P. motors. General Electric and ar i 110 volt, 60 cycle phase. Brand new, never unnacked, guaranteed perfect, $18.00 $22.00. Pennsylvania Motor Exchange, Lancaster, Pennsylvania. WE make circular letters, folders, programs, postcards. Satisfaction guaranteed. Prices rock ttom. Pioneer City Business School, Marietta, Onio FREE catalog of ideas in iabels that will benefit your business. , Royal Label Company 27 South Seventh, LABORATORY AND CHEMICAL SERVICE 100 Bond letterheads and envelopes, $1.25 postpaid. Garland Miller, Trimble, Ohio. S—50 different. chemicals including ‘dine, dreds riments. oratory 25 yy Includes alcohol lamp, beaker, Erlenmeyer flask, veane’, 10 test-tubes, test-tube holder, etc. Send $3 aper, Sew Equip “EXPERIMENTERS—Buy your nenters CQ balances, laboratories h o i League. FORMULAS Workable Formulas—$1.00 each; Shoe Polishing Paste (black or tan); Mechanics’ Hand Paste; Refilling Composition Paste for Storage Batteries. of preparation and sources vf supply ‘all formulas. Industrial Methods Bureau, 1 West Street, New York City. 10,000 Tested Formulas; Cost? le for 25; before order- ing send for catalog “B’’—today. Goodnow, Highland Avenue, South Sudbury, Massachusetts. WORTHWHILE Formulas! Egg .substitute—Me- chanics’ soap—Renewing dry batteries—Gasoline saver— Resilvering mirrors—1l0c each. Entire Collection, 25c. 500 Reliable formulas 20c. Satisfaction guaranteed. Norman Ovri, Hemet, California. FORMULAS! Luminous Paint—Renewing Dry Bat- teries—Hektograph—Mechanics’ Soa Resilvering Mir- rors—Gas Tonic—Egg Substitute—Trappers, Baits—10c each. 706 —— 25c. ‘Collection complete 50c. Sudbury, Massachusetts, 500 Successful money-making formulas and _ trade secrets. Postpaid 25c. Charles Dynes, Winchester, Indiana. TOOLS AND SUPPLIES CONCRETE Building Block Machines and Molds Cossbogne free. 203 South Second Street, St. Louis, Missouri. FOR SALE OR EXCHANGE “SWAP! Buy! Sell! Free oe 3 months, dime. “Trade Topics,’ Detroit, Michigan 500 Newmarket Bond envelopes, printed, $1.80, postpaid. Echo Printery, Wauwatosa, Wisconsin GUMMED Labels! Interesting! Samples free! Edward Harrison, Artistic Printing, Baltimore. ADVERTISING SERVICE BUSINESS-BUILDING letters, $5.00; three, Et Advertisements, circulars, booklets written. esults Criterion Servics, Dept. All, West new” York, New Jersey. YOUR advertisement in the classified columns of the Electrical Experiment>r, Science und Invention, will reach the verv class of men you seek. Circulation 100,000 net. Rate 7c word. The Electrical brings Positive results:. For proof, address Classified Department, 233 Fulton Street, New York. SPECIAL! —_ 8'4 x 11 display advertisement, 150 magazines, thrice $111.00. Wood's Popular Advertising Service, Atlantic City. receipt of 25c in coin or staraps. J. W. Jouneon, ? New Arts , Dept. PS, Rochester, New Yo FILMS developed 5c roll, — 3c each. Photo Service. 929 MeMillan, Cincinnati, Ohio DO you take pictures? Send one thin dime for our big magazines showing how to take better pictures and earn money American Photography, 156 Pope Building, Bos. ton, Massachusetts. SPECIAL offer—Your next Kodak film developed 10c and prints 2c each Best workmanship. Enlargements a specialty 24 hours service. Enclose,money with aay 4 Write for price list sample Jonston & Tunick, 53 Nassau Street, New York C FOR MEN AND WOMEN CH Fish Every Trip! Information for stamp. George Juliau, Albany Building, Boston. POPULAR Science Monthly makes the Industrial Progress of the worid crystal-clear 10 you. $2.00 will bring this surprising magazine to your home each month for a whole year GENUINE Indian Baskets— Wholesale. Catalogue. Gilham, Highland Springs, California. ~"3EXUAL Philosophy,” specific, authorita- tive, — best satisfies. Fred B. Kaessmann, Law- rence, Mass. BEa detective, Excellent opportunity, good pay, travel. Write C. T Ludwig, 424 Westover Bidg., Kansas City, Mo. MR. ADVERTISER: Ask today Tor a copy of the “Quick-Action Advertising Rate Yoider."’ It contains some really oo facts which will prove interesting and valuable to you. It also tells ‘How You Can Use Popular Science Monthly Profitably."" You'd like to know, wouldn’t you? Manager Classified Advertising, Popular Science Monthly, 225 West 39th Street, New York. 25 words, 100 monthlies, three $2.50. Southwest Advertising Agency, Los Angeles. ADVERTISE! In The West Virginia Advertiser. 30 Words for. one year, $1. . Evans, Publisher, 729 6th Avenue, Huntington, West Virginia. ADVERTISE! 24 words in 100 mag Lists free. — Service, 308 Hostetter aiding: Pittsbu Pennsylvania LETTER SPECIALISTS BUSINESS-BUILDING letters, $5.00; three, $12.00. Advertisements, circulars, booklets written. Results guaranteed. Criterion ‘Service, Dept. All, West New York, New Jersey. COLLECTIONS «ND ADJUSTMENTS FRANK! Forceful! Collection service. Terms, you pay w aid. Everywhere! Pequonnock Mercantile Agency, “Bly. sion PS, Bridgeport, Connecticut. DREDGE’S Necktie Valet removes wrinkles (without ironing) from neckties. Someee 25c. Get one today 190 Pilgrim Averue, Highland Park, Michigan. GET vital strength! Retain youthful vigor. Wonderful results, Inténsely interesting booklet free. Winslow E. Chase. Washington, D. C. “HEALTH-CULTURE” —insures vital force, youthful vigor. strength and beauty, 25c. ‘‘Natural Laws Govern~ ing Success’’—1t58_ pages, $1.00. Five peak.” 30c. Professor Anderson, PM1336 Morse, cago. FOR BOYS HERE boys! Make a toy aeroplane; see our Nifty ad Page 128. FOR THE HOME GUARANTEED 10 years luminous. Don't be afraid of the dark. Keal radium lokators find the way. Used on key holes, door knobs, poison bottle, electric switches, etc. Shine at night. No fake. 25 centscoin. Agents wanted. Radium Products Company, .712 Monroe Place, West New York, New Jersey. GRANDFATHER’S CLOCKS CLAIMS Collected Anywhere! Fidelity — Com- pany, 818 East Broad Street, Richmond, Virginia OFFICE AND FACTORY EQUIPMENT MISCELLANEOUS MULTIGRAPHS —Addressoaraphs, Multicolors, dupli- cators, Folders, Sealere, Typewriters, Dictaphones. Chec Teese. Office Device Company, 22 North Wabash, cago. TYPEWRITERS AND SUFPLIES NEW, remanufactured and aeehy used Typewriters $8.00 up: Portable Machines $10 up. Write for our Catalog 25Z. Beran Typewriter Company, 58 West Street, Chicago. y used Und pesees Typewriters. Box 240, cy Station, New York ADDING MACHINES WONDERFUT ‘adding seven columns ca-. ty, onlv one dollar. Adds and multiplies as /ast as the ers will move. Thousands being sold through demon- stration. L.J. Leishman Company, Dep't L., Ogden, Utah. ARTISTS’ MATERIALS HAVE tried “Snow White” fluid with pen pen — or air brush. It is the standard for u white ink, white water color or air brush spray. Most excellent as a : white or as a base for all tint colorings. By return mail on wot t dy 25c in coin or stamps. Ww. Johnston, New Arts ling, Dept. PS, Rochester, shar York. WANTED . SEND to Cleveland, by mail or express any new or dis- carded jewelry, old gold or silver, loose or mounted dia- te or gems, false teeth, platinum, magneto points, bonds or stamps, gold or The highest Drlees in rewire Goods re if our hio Sme' ‘ompany, Lennox Building, Clev eland, "Onio. WANTED—Representatives in every in the United States. Popular Science 225 West 39th Street. New York WANTED—Novelties suitable for advertising, or ideas for’ novelties. Good price for right item.’ Will Ry money to procure patent if we accept ideas. Arkay Mfg. Company, 2354 Cottage Grove Avenue, Chicago, Illinois. TELEGRAPHY TELEGRAPHY (both Morse and wireless) and Railway Accounting taughi thoroughly and quently. Big salaries ELECTRICAL Tattooing Machine, $3, $5, and A St: Catalogue for stamp. J. H. Temke, 1019 Vine, Psm. Cincinnati, Ohio. QUESTIONS Answered. All subjects. Send for Circular 2. Answerall Information Bureau, 51 Cliff Street, New York. MACHINISTS _ Send 25c today for working drawing ¥ a new adjustable boring tool. Just what you need. G. Markett, 49 Vanness Avenue, Springfield, Sbaeiamenmiia® MOTION PICTURE BUSINESS MAKE money fast—small — starts you with guaranteed professional beers picture machine. Com- plete outfit on sa. payments. No experience needed. Catalogue free. De S, Monarch Supply Service, 420 Market Street, Be Tame Missouri $90.00 buys complete professional moving picture machine, supplies, “2 everything ready for rite for bargain sheet. Feature. kilm Exchange, py 9A, 228 Union Avenue, Tennessee. ed, ur machines are used and endorsed b fnstitutions. Catalog Free. Atlas Moving. Co., 441 Morton Building Chicago. MOVIE Cameras $50: is $5. Projectors $40. Rav, 326 Fifth Avenue, New York WRITE 8: = each. Experience unnecessary details free to beginners. Producers’ League, 19+, St. Louis. PHOTOPLAYS Wanted. Big prices paid. You can write them. We show vou how. Free particulars. Rex Publishers. Box 175, F 19, Chicago. MAKE money fast. . Start *‘Movie’’ theater with small capital. Buy complete outfit on easy payments. Opea- ings everywhere.: No experience required. Catalog free. National Moving Picture Company, Dept. 0, Ellsworth Building, Chicago. AUTHORS—MANUSCRIPTS” FREE to writers—A wonderful little oo of money- and _ play-writi ‘Absolutely Free. address: Pleas Dept 15, Auburn, New York ANUS RIPTS Typewritten—correctly peers and he hg N Criterion Service, West New York, New Jersey. WRITERS: Stories, poems, plays, etc., are wanted for publication. Literary Bureau, 117, Hannibal, Missouri. WRITE for newsp and i Big Pay. Ex- perience unnecessary, Fetails 4 free. Press Reporting Syndi- cate, 400, St. Louis. WRITERS! Have you a song-poem, story, photoplay, now paid. Great opportunities. Oldest and Largest School—Est. 45 years, Catalog free. Beau Institute, Street, V alpars iso, Indiana. making hints, suggestions, ideas; Lg A B C of successful - GRANDFATHER'S Clock Works $5.00. Build your own cases from-our free instructions. Everybody wants a hall clock. You can make good profit building artistic clocks for your friends. We replace worn-out works in old clocks with works. having chimes at money saving. prices. Write for folder describing the most beautiful hall clock ever sold at $25.00. Clock Co., Nicetown, Pennsylvania. ’ CHRISTMAS SUGGESTIONS UNUSUAL Christmas Gift. Amateur Craftsman: his i ——- book for the handy man fully describes and Hustrates how to make various useful things. You will be amazed at the weasel things you can make with a saw and a hammer, or with a aril!” and other simple tools. This book will add greatly to your pleasure if you like to make things. You can save many times the price of the lustrations. ice $3.00 postpaid. Will be published on or about December 1, 1919. ook Department, Popular Science Monthly, 225 "West 39th Street, New York City. DIAMONDS, WATCHES, JEWELRY SEND $5.00 for a —_ Green 21-inch Japanese Jade Necklace. Not one in ten can tell it from the $1200.00 Genuine Chinese . Jade Necklace. If you want to make a lot of money handling this line or want the very latest as a gift for —_ oens. order at once. R. B. Brenneman, Hammond, jana. DISTINCTIVE jewelry ae discriminating buyers. Our pes surprisingly low. We guarantee to save you money. nd for our catalog and see why. David Stern “- pe Service, Satisfaction since 1885.” Chicago, nois. DOGS, BIRDS, PETS SPORTSMEN—Trained beagles, rabbit, fox, coon, skunk, squirrel and opossum dogs, bird — 4 ‘pet and —_ dogs, swine, pheasa: ‘oats. Varieties . blooded . Circulars ioe” iolet mn Kennels, York, BREED Canaries—Profitable a Particulars free. Bird Farm, Lynnhaven, Virginia FISH, AQUARIUMS, SUPPLIES LEARN about Gold Fish. Imported Japanese and American gold fish, aquarium plants, food, cement castles, snails, Artistic aquariums for beautiful homes, conserva- tories, lawns; special aquariums made to order. Catalogue free. Pioneer Aquarium Company, Racine, Wisconsin. FISHERMEN: Honest fish lure. Formula, 20c. John Eberle, West Water, Chillicote, Ohio. ROOTS, HERBS, PLANTS Medical Plant Company, Box 16, West Milan. to sell? Submit manuscript now to Music Sales Company, 48, St. Louis. New Hampshire. | | | | | will ] g of e | save nh ar ac | | | | ark, New 3 all ma) | ed Brockton, | cles, $5.00 3 Illustrated 162 North is = : now D. Latest : usands of | | | motors 30 a Patent,” nion of its x ip service & new cor- thorough ol Of Avie Chicago. igh speed. Overseas: perfect, ial machin. : tlass model — If so, send cturers and : forth 12th cls, sntions de- ~ . boo 445 ring, metal RELIABLE Adding Machines. Latest Models. Stan- PY 44 ae dard Capacity. Five-Year Guarantee. Prices $10 up. : Big illustrated catalog free. Calculator Corporation, 7 r ortunity for rs on large | liers, Army, urships and industrious ited r 50,000 Ii an ind a out any year paying and m its from $3. nd informa- y, 32 Union | r, $1.50 up. = = . You need — GINSENG—$10,000 made from one-half acre; easily : grown in northern U. S. and Canada. printed in-
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MUSIC AND SHEET MUSIC GAMES AND ENTERTAINMENT DO. you want your bos poems accepted? Send poems today for best mmediate publication and’ free | examination. Song writing booklet on request. and Composers Service Suite 529, 1431 New York. SONG writers: You cannot afford to miss our proposi- tion. Reference, anv bank or first-class sheet music house. —— C. Williams & & Company, Dept. 8, Indianapolis na. WRITE the words for a song, We write music, guaran- tee publisher's Submit poems on patriotism. love or any subjec Chester Music nen. 920 South Michigan Avenue, Chicag: ot wg for a song. we poems, music and guarantee to secure Publication, Submit poe! on any subject. Broadway Studios, 121C Fitzgerald Building, New York. MAGIC Rings—Most Anvetifying trick on earth | Anyone fools—everyone. 12c Postpaid. Send today ee Brothers, Cleveland, Ohio. 000 Stage tricks with 500 “500 illustrations. Catalogue 150° smalf catalogue free. Hornmann Magic Companv, 304 West 34th Street, New York. TRYCKS and Greenbacks. Big magic Ccatalo jog _ 5c. greenbacks—10c. Gilmagico, 11135 South Irving, cago INVENTORS, send sketch or m for opinion concerning. patentatle nodel ot you Invention’ res, for-patent. - Book, ‘How to Obtain 24 cost of stablished five years, ee Chandiee, plished NW D.C Seventh Sure, PROTECT your rights—Write for Record of Inver tion” which contains forms to establish liver ception of your invention. Erompte Preliminary advice without charge. J Reane 732 Woodward Building, Washington, TRICKS, puzzles, oo magical apparatus, plays, stage supplies, mind reading acts, sensational escapes and illu- sions. Big illustrated” 1919 ‘catalogue free. Oaks Magical Company, Vept. 535, Oshkosh, Wisconsin. MAGIC pictures complete outfit for making, 10c. Great- est fun producer on earth. R. E. McIntyre, General Post Office, New York. “WRITE a song—Love, mother, home, childhood, patri- = or any subject. I compose music and guarantee publi n. Send words today Thomas Merlin, 238 Reaper Block, Chicago. words for a the music, publish, copyright. Sub ms on any subject. The Metropolitan Studios, ite South Michigan Avenue, Room 106, Chicago, Illinois. SONG-WRITERS’ Manual and Guide Free! Con- tains valuable instructions and advice. Submit —_e- poems for examination. We wiil furnish music, copyright and facilitate publication or sale. Knickerbocker Studios, 315 Gaiety ae New York. “HAVE you ms? { have best proposition. Ray Hibbelier, Di 0 Dickens Avenue, Chicag MUSICAL INSTRUMENTS CORNETISTS—trombonists: Free Pointers” on weak oe tones. Virtuoso Coraet School, Buffalo, New VIOLINS Deep, es Soulful—on credit. Easy terms for wonderful instrument. Get details today. Gustav Henning, 230 11th Street, Miami, Florida. PHONOGRAPHS, RECORDS, NEED iss ” MORTONE—the needle that reproduces all the music. Guaranteed to play any record gh — Box fifty, 15c. Twenty boxes and record clea — ay 00. Mortone Com- panv,.Century Building, New York Cit AUCTIONEERS AUCTIONEERS—Make big money. Free catalogue, Carpenter’s Auction School, Kansas City. PICTURES AND POSTCARDS PICTURES for your den, club, office and library ape you interested? Send your name, write plainly and piease one nomoney O. W. Miller, C105, Chambers Street, New crk. JOIN Live Postcard Club. Membership Papers 10c. Harvey Teeple, Decatur, Indiana. THE Lone Fine Post Card Club offers you_a member- ship for 10 cents. J. Miller, 1430°H Street, Sacramento, California. EXCHANGE Postcards!!! Fascinating pastime; Join bs Sunset Postcard Exchange. Enthusiastic members verywhere. Interesting magazine free. Norman Ovri, Hemet, California. STAMMERING STAMMERING cured—quickly, permanently, and rivately. Write for free booklet. Samuel E. Robbins, 46 Huntington Avenue, Boston, Shesmtaneennis. ST-TUT-T-T-TERING and Stammering cured at home. Instructive booklet free. Walter McDonnell, 59 Potomac Bank Building, Washington, D. C. BUILD Phonographs: We furnish ee tonearms, cabinet material and blue prints. Catalogue free. In- yootignte. Belltoua Company, North Tonawanda, New ork. MUSIC for Christmas. Our prices on standard talking machines so low you cannot afford to be without one in your home, Send for our catalog. You'll save money. David Stern Company, “Value, Service, Satisfaction since 1885, Chicago, Illinois. USE Johuston's Snow White” fluid for marking discs, disc al bums and album pas. It is easily seen and will not rub off. return mail o roceint of 25¢ 1 in coin or stamps. ohnston, New “Arts. Building, Dept. PS, Rochester, ew Yor' BUILD your own phonograph. Big saving.- Pi t FOR INVENTORS 906 Mechanical also Stations explaiu- ing 50 Perpetual M My Inventor's Uni- versal Educator, Filth. tells how to procure and sell patents. Government and other costs. Covers the matter from A to Z. 160 pages elegantly bound. Con- tains noted decisions of U. S, Supreme and State Courts on Patent Cases. Mechanical Movements greatly assist inventars—suggest new ideas that may prove of great aid in ——— inventions. Tells how to select an Attorney. Has vajuable information Sharks, Selling Agents and Brokers. _ Price $2. tage Free everywhere. Fred G Dieterich, 681 Ouray Building” Washington, D. C. instructive — Complete etc. absolutely free. Write ssociated honograph Company, Dept. F1, Cincinnati, Ohio. EDUCATIONAL AND INSTRUCTION ‘MECHANICAL DRAWING successfully taught by mail. Fifty centseach Lesson. Pay as yougo. No other expense. Complete drawing outfit Veaued at $20.00 free with the Course. One hundred genuine blueprint lessons. We will assist you to secure a oon paying position. Send rticulars and sample Albany _ institute Mechanical Drawing, Desk B, Box. 84, Albany, New York. photographic Pays $2,000 to $5,000 early. Camera reporters demand. Complete 12- lesson course $1 prepaid. Particulars free, Rodgers Hog- gard, Publisher, Windsor, North Carolina." FREE Service to Teachers. Do you know that Popular Science Monthly prepares = sends Free, Service Sheets each month to teachers? us be your Liaison Office between the classroom and von life. be gg is no cost to ~ — this service. If you want to put a real “Punch” classroom work write to Yad Selence Monthly, 228 West 39th Street, New York C SALESMANSHIP wins. We instruct by mail and | a parses ne offer of position or refund tuition. Kansas ocational Bureau, Miltonvale, Kansas. CARTOONING os and Lettering in fourteen lessons $3 easy y postpaid. Over Order yours now. Emie’s § School, Elyria, O “SPANISH In A Week.” This book contains the elements of the language, easily grouped, and with su : cient vocabulary to enable anyone to obtain a working knowledge of Spanish. Every word gy ronounced. Con- tains commercial information. of all Latin America. Price 65c. k Department, Ld Science Monthly, 228 West 39th Street, New York C m and women earn $25 folder. free. C. INSTRUCTION by Mail—over 100 courses. For “Free Tuition Plan,” apply Carnegie College, Rogers, REAL ESTATE—FARM LANDS OWN vour own orange grove in beautiful Fruitiand Park. Write todav for information how you can own it on easy terms. ke County n wners’ Association, 205 Beauty Street, Fruitland Park, Florida. MONEY-making farms—-17 Stzves—$10 to $100 acre. Stock, =e, crops often included to settle any. write for pay Ee ~ ustrated catalogue. E. A. Strout Farm Agency, H, Sun Buiding, New York. CALIFORNIA sale; write for list. E. R. ite, Shawnee, Okla PATENTS FOR SALE OUTRIGHT or indle for vehicles. Ereceds | all others now i . Felber, 2700 Chartres Street, N New Orleans. Louisiana, ““WE have a few practical — ort trade. inventions for Adam Fisher Mfg. Co.,, 183B, St. Loi “SHOPWRIGHT mortice lock; set in eight minutes. J. M. Hyde, Butler, Indiana. PNEUMATIC,. hand portable automatic tacking ma- ehine;. patented. C. F. Warnke, 1129 Fernwood, THE Electrical Experimenter Classified Columns bring. ositive results. Circulation 100,000—rate 7c word. For nformation pees Classified Department, 233 Fulton Street, New York free atentable nature. Highest re*.7ences. Prompt ~ mable byt Victor J. Evans & Co. .» 156 Ninth, Washington, D. C. HAVE you a practical invention to sell outright or place on royalty? ene ” tails to Adam Fisher Mig. Co., 183 A, St. Louis, Missour INVENTORS:—lInventions properly commerc‘alized bat =~. Benjamin Jonap, Marion Building, Cleve- an io. PATENTS—My fee payable In monthly instalimenis. Send sketch for advice. Booklet mires. Frank wae. Washington, D. C. SELL or finance inventions! Read Talks” Magazine. Send for free sample copy. 70-C Park Place, Newark, New Jersey. INVENTORS join enemy Institute of Inventors, 118 Fulton Street, New York City; membership society 1900 strong; will help you pig develop, finance and invention. Absolutely no charge. Write or booklet. INVENTORS—We will manufacture and market at our Own expense, any good invention. Will also assist in de- veloping ideas and obtaining patents. Our sales force covers the U. S. and Canada. Write for booklet. The Avalon Manufacturing Company, Cleveland, Ohio. - “INVENTOR’'S Free: gives valuable informa- tion and advice. te F. Ledermann, 15 Park Row, INVENTORS: We make models, dies. tools. 28 years’ experience: work guaranteed: lowest price. Manu- facture of specialties our hobby, Pearless Die & Tool Company, 121 Opera Piece, Cincinnati, Ohio. EXPERT Technical Sales Service for Inventors. In- formation free. L.M. Geibel, 22 Cheltenham Drive, Buffalo, ‘New York PATENT ATTORNEYS PATENTS. If you have an invention which you wish Il freely to Munn & Co., many cases ard to patentability without any expense to the Gieat.. Hand Book on Patents is sent free on request. This explains our methods, terms, etc., in regard to Patents, Trade Marks, Foreign Patents, etc., “Scientific American” contains Patent Office Notes. cently patented inventions. Munn & Co.,-Solicitors of Patents, 624 Woctworth Building, New York, and 625 F Street, Washington, D. C.; Tower Building, Chicago, nos ‘Boston, Massachusetts. M. E. Miller, Ouray , Building, “Washingt ton, Doe patent attorney, mechanica} aad Uectrical expert, c., cuality of work and results. Moderate charges, “HOW to Establish Your Rights” to patent protaminr is a bulletin every inventor should read pees re ieee his idea to others. this bulletin, form of Con, Gisclosing ception” and other interesting and valuable Patent eee mation free. Lancaster and Allwine, 232 Ouray B = Washington, D.C. Originators of the form, sro Conception.”’ PATENTS procured—trade marks prehensive, experienced, prompt service for the provesaat and development of your ideas. _Prel.minary advice furnished without charge. coe of information and form lor disclosing idea free on request wen, at wen Building, Washington, or 227 uilding, New York. Woak oolworth MASON, Fenwick & Lawrence, Washing D, C, New York and Chicago. Established over half nd description and sketch for information Ten: marks registered. = PA.ENTS, prompt, personal, efficient ser “wy Attorney -at-law skilled in all branches of Patents by aa it Di Over 12 yg actual experience Full inform quest. . Fishburne, 323 McGill Build ton, D. C. PATENTS Procured—Personal, careful, efficient service. hest references. Moderate fees, . Kimmel aster of Patent Law, Trust Building, Washington, D. C Ss PATENTS—Herbert Jenner, Patent and chanical Expert, 622 F. St., Washington, D. C. a patent can be had and its exact cost. Send tor citediee Dado Foremost word seut. Write now. etzger, Washington, D. C. “INVENTORS Adviser’ free on req C. Linton, 918 F Street, Washington, D University. Street, Montreal, Canada. PATENTS. Booklet free. references. Best . results. Promptness assured. Watso E. Patent Lawyer, 624 F Street, Washington, D, G PATENTS—Fees in installments. Frank formerly Lieutenant, Engineers, Washington, D patented; trade-marks registered, — publications copyrighted: prompt service; reasonable plain advice; request detailed information win Jaynes & Jaynes, 801 Kellogg n, PATENTS, Trade-marks, Copyrights. Write t free book of patent information. Beale & Park,’ Thee F Street, Washington, D. C. FREE Book on Patents—Write today for Free Copy of “How to Obtain a Patent.”” Contains valuable information and advice to inventors. Tells how to secure Patents, Send model or sketch of your invention for opinion of -itg nature—Free. (20 years’ ge Talbert albert, 4624 Talbert Bldzg., Washington, D. PATENT applications filed on Tracemarks, copyrights, etc. Milo B ns & pany, 640 F Street, Washington. Kstablished™ 1864, AGENTS AND SALESMEN WANTED AGENTS—Our new and original selling plan will enable any man or woman to make good as our representative. Not merely a living, but money in the bank can be earned if you are not afraid to work. No experience necessary, We manufacture over 22 fast selling pharmaceutical and household products. Our leaders are Colortone Dye —absolutely the best. Glen Ellyn Laundry Tablete— latest discovery to wash clothes snow white Mole Tub- bing. Every home will take one or more of these ucts at the start and filling repeat orders should take alt of your time after 50 days. Coupon in every package helps make sales. For full particulars write at once to Glen Ellyn Products Company, Div. 303, Glen Ellyn, Illinois. AGENTS: Necessity results in invention of Vapor Con denser Cover. Fig on sight. Postal for particulars. Hart Machine &- Tool Conpeey,, 364 Atlantic Avenue, $40 to $100 a week. Tree samples. Gold sign anyone can put on windows. Big demand. Liberal off to general agents. Metallic "Letter Company, 431A North Clark, Chicago. “~AGENTS—Something different! Our Co ous) Crucifix, actually shines in. the dark. Startling! Mysterious! Wonderful! Enthusiasm every demonstration. 150% profit on every sale. Sole manu- facturers. The Pioneer Corporation, 1263 West 63rd Street. Chicago, Illinois. WONDERFUL New Chemical. $1.00 te equal 50 gallons gasoline. Eliminates carbon. 50% more mile age, power, speed. Guaranteed. Whirlwind seller. Auto owners buy on sight. 100% profit. Repeater. mon- strating package, terms, territory, _ postage. Myers & Company, 36 Baird, Cambridge, Ohio. IDEAL Sideline. Business men buy on sight. 31.00 seller, 400% profit. N..Home, 1957 Warren, Chicago. WONDERFUL chance! Men’s shirts and furnishings at wholesale rates, or make $10 oy x starting real business. Goodell Company, 79 Duratex Building, New York. MEN and your business, experience ecessarv ur $6,000 Actix dental 1 Death, $30.00 Accident $25. 0G Weekly $10.50 yearly, half amounts $5.50. Guaranteed steady come from renewals.. $250,000 deposited Insurance partment. Registration Dept. S., Newark, N. J. VULCANIZING auto-tires growing profitable busines aw now. Easy to learn. Instruction book $1. Plants $50 up. Catalog free. Equipment Company, 372 8th Street, Cincinnati, Ohio. MAKE and Own Goods. Machin.-y unneces sary. Expert C ts advise.. Special attent on to be ginners. Write Catalog. Elmer Mysti¢ ompany, Washington, D. C. PATENTS promptly procured by personal expert service. Seen on request. -James c. Lyles, Wash- LACEY Sem, “The the keeps.” Free. See page 1 PATENTS. Trade Marks, Copyrights. Prompt, sonal, reliable service. Over 30 years’ active oractice. Write for terms. Book . _Address E, G. Siggers, Box 1, N. U. Building, Washington, D. C. PATENTS. Write for free illustrated guide book, “How to Obtain a Patent.”” Send sketch or model znd description A _ — of its patentable nature. Highest ref- rompt attention. Reasonable terms. Victor SE Evans & Co., 155 Ninth, Washington, D. C. MR. ADVER'FISER: A38k today for a copy of the ‘‘Quick-Action Advertising Rate Folder.” It contains some really important facts which will prove interesting and valuable to you. It also tells “How You Can Use Popular Science Monthly Profitably.’’ know, wouldn’t- you? Manager Classified Advertisi =— Science Monthly, 225 West 39th Street, New Yo! NTED: Man with auto in every section to sell our Big Six-In-One tool, comprising vise, pipe —. anvil, drill press, ‘cutting hardie and corundum grinder. Every farmer, janitor. private or public garage, small shop, ete. @ prospective buyer. Outfit weighs 90 pounds, sells for $26 with a fat profit to you. No trick to sell. Always pleases, hicago Flexible Shaft Company, Dept. H. We West 12th Street, Chicago. | i] it | it He ie if | | — } hi i es, | PATENTS. Write for free illustrated guide book.. Send 2 = ~ 4 | = i oe SHOW Card Writing—Profitable profession easily and | — q | uickly learned during spare time and evenings. Simplex Rai ; for advice in regard to the best way of obtaining protec- |) | tion. Please send sketches or a model of your invention and a description of the device, its operation. All —— communications are strictly confidential, Our vast prac- i = | Dhio. |
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Write for Park,’ 1410 F payment evens & ed 1864, NTED lan will enable representative. can be nce nec naceutical and e without rub- these products take all of your Ellyn Glen llinois. | of Vapor Con- or particulars. Jantic Avenue, sign _ Liberal offer 431A North 33 Package equal 0% more mile ater. De! age. Myers sight. $1.00 n, Chicago. d furnishings at usiness. Insurauce De N. J. fitable bi tion book $1. ant Company, hin.*sy unneces ttention to De Elmer Mysti¢ & copy of the Jt contains eet, New YO! ‘tion to sell our rise, anvil, drill nall shop, ds, sells for $26 Always pleases, Dept. H. Ww. that has come to the United States in many a year. With a record of 400,000 successes in England, this famous course in mind training has been Amer- icanized at last, and is now operated by Americans in America for American men and women. Pelmanism 1s neither an ex- riment nora theory. For twenty years it has been teaching people how to think; how to use fully the senses of which they are conscious; how to discover and to train the senses of which they have been un- conscious. Pelmanism is merely the science of thinking; the science of putting right thought into successful action; the science of that mental team play that is the one true source of efficiency, the one master key that opens all doors to ad- vancement. I heard first of Pelmanism during a recent visit in London. Its matter filled pages in‘every paper and magazine and wherever one went there was talk of Pel- manism. “Are you a Pelmanist?” was a common question. It was T. P. O'Connor who satisfied my curiosity and gave me facts. By 1918 alone there were 400,000 Pelmanists, fig- uring in every walk and condition of life. Lords and ladies of high degree, clerks and cooks, members of Parliament, labor- ers, clergymen and actors, farmers, lawyers, doctors, coal miners, soldiers and sailors, even generals and admirals, weré all Pel- manizing and heads of great business houses were actually enrolling their entire staffs in the interest of larger efficiency. The famous General Sir F. Maurice, de- scribing it as a “system of mind drill based on scientific principles,” urged its adoption by the army. General Sir Robert Baden-Powell and Admiral Lord Beres- ford indorsed it over their signatures. In France, Flanders .and Italy over 100,000 soldiers of the empire were talking Pel- manism in order to fit themselves for re- turn to civil life, and many members of the American Expeditionary Force were following this example. Well-known writers like Jerome K. Jerome, Sir Arthur Quiller-Couch, Max Pemberton, the Baroness Orczy and E. F. Benson were writing columns in praise and interpretation of Pelmanism. Great editors like Sir William Robertson Nicoll and educators such as Sir James Yoxall were going so far as to suggest its inclusion in the British educational system. As a matter of fact, the thing had all the force and sweep of a religion. It went deep into life, far down beneath all surface emotions, and bedded its roots in the very centres of individual being. It was an astonishing phenomenon, virtually com- pelling my interest, and I agreed gladly when certain members of Parliament of- fered to take me to Pelman House. A growing enthusiasm led me to'study the plan in detail, and it is out of the deepest con- viction that I make these flat. statements: Pelmanism “can, ‘and does, develop and strengthen such qualities as_ will power, concentration, ambition, self-re- liance, Judgment and memory. Pelmanism can, and does, substitute “I will” for “T wish” by curing mind wan- dering and wool gathering. Pitas com is the biggest thing GEORGE CREEL Viewed ‘historically; Pelmanism is a study in intelligent growth. Twenty years ago it-was a simple memory training system. The founder of Pelmanism had an idea. He went to the leading psychologists of England, and also to those of America, and said: “I have a good memory system. I think I may say that it is the best. But it occurs to me that there is small point in memory unless there’s a mind behind it. You gentlemen teach the science of the mind. But you teach it only to those who come to you. And few come, for psycholo- gy is looked upon as ‘highbrow.’ Why can’t we popularize it? Why can’t we make people train their minds just as they train their bodies? Why can’t you put all that you have to teach into a series of simple, understandable lessons that can be grasped by the average man with an average education?” And the eminent professors did it! Pel- manism to-day is the one known course in applied psychology, the one course that builds mind as a physical instructor builds muscle. It teaches how to develop personality, how to build character, how to strengthen individuality, Instead of training memory alone, or will-power alone, or reasoning power alone, it recognizes the absolute interdependency of these powers and | trains them together. It is not, however, an educational ma- chine for grinding out standardized brains, for it realizes that there are wide differ- ences in the minds and problems of men. It develops individual mentality to its highest power. The course comes in twelve lessons— twelve “Little Gray Books.” They are sent one at a time and the student fills out work sheets that are gone over, with pen and ink, by a staff of trained instruc- tors. There is nothing arduous about the course, and it offers no great difficulties, but it does require application. Pelmanism has got to be worked at. There is no “magic” or ‘“‘mystery” about if. It is not “learned in an evening.” You can take a pill for a sluggish liver but all the patent medicines in the world can’t help a sluggish mind. Pelmanism By George Creel is not a “pill” system. It proceeds upon the scientific theory that there is no law in nature that condemns the human mind to permanent limitations. It develops the mental faculties by regular exercise, just as the athlete develops his muscles. Brains are not evolved by miracles. Just as the arms stay weak or grow flabby, when not used, so does an unexercised. mind stay weak or grow flabby. Pelmanism is the science of Get There— getting there quickly, surely, finely!:- Not, for men alone, but for women as: well. Women in commercial pursuits have the same problems: to overcome as. men. ‘ Women in the home are operating a busi- ness, a highly specialized, complex busi- ress, requiring.every ounce of judgment, energy, self-reliance and quick decision that it is possible to develop. I say deliberately, and with the deepest conviction, that Pelmanism will do what it promises to do. Talk of quick and large salary raises suggests quackery, but with my own eyes I saw bundles of: letters telling how Pel-. manism had increased earning capacities from 20 to 200 per cent. With my own ears I heard the testimony of -employers to this effect. Why not? Increased effi- ciency is worth more money. Aroused ambition, heightened energies, refuse to let a man rest content with “well enough.” But, Pelmanism is bigger than that. There’s more to it than the making of money. It makes for a richer and more wholesome and more interesting life. One may utilize Pelmanism as a means of achieving some immediate purpose— financial, social, educational or cultural— but the advantages’ of the training touch life and living at every point. (Signed) Grorce CREEL, Note.—In bringing Pelmanism to America, the needs of the United States have been considered at every point. Plan, methods and principles remain the same but American psychologists have Americanized the lessons and American instructors, carefully trained in the course, will pass upon every work sheet. Pelmanism is taught entirely by correspondence. There are twelve lessons—twelve “Little Gray Books,’’ The course can be completed in three to twelve months, depending, entirely upon the amount of time devoted to study. It guarantees nothing but what it can deliver. A written statement, in which the student gives his word of honor that he has not received results, will gain an instant refund of fee. Whatever may have been your experience with other courses, Pelmanism will help you. “Mind and Memory” is the name of the booklet which describes ‘Pelmanism down to the last detail. It is fascinating in itself with its wealth of original thought and incise observation. It has benefits of its own that will make the reader keép it. . Accompanying the book is a statement by Sir Arthur Quiller-Couchg giving this eminent author's view on the course of study. After you understand Pelmanism and appreciate what it will do for you, you will want to become a Pelmanist at once, The book, ‘‘“Mind and Memory,” is free. Use the coupon or a postcard and send for it now—TODAY. PELMAN INSTITUTE OF .AMERICA 505 Fifth Ave., New York, N. Y. PELMAN INSTITUTE OF AMERICA 505 Fifth Ave., New York, N. Y. Please send me, without obligation, your free booklet, ‘‘Mind and Memory.” NOW All correspondence strictly confidential, teane’ Y HANS tiff UA Ya De expert. Best Arges, Advicg disclosing Loan & Trust 10W. .Metager, \ lest. Wi nD. erences ak erences. Best . E. Coleman ‘ D. G ok Fuller, istered; labels, ice; reasonable mation’ before 801 Kellogg, ; r Free Copy of a ble information 3 ecure Patents, opinion of -its ice.) Talbert & : tone Dye Soap i dry Tabletse— ( adium (Lumin- | Tk. Startling! follows every | > manu 63rd Auto w_York. nt—own your ir $6,000 Actix eekly Benefits, | : — You Can Use | You'd like | eee q
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Quick-Action Advertisements continued from page 12 to take orders and sell Saves 6,000 miles. A wonderful new puncture ee pret tire costs % as much. A ‘quarter million. enth users of this new idea already. No competition. En- tirely different. Every car owner easily sold. Double your salary on repeat orders alone. A big profitable Proposition to a limited number local representatives. Spare time to start. —— free. Be quick—territory fast. Address: Mr. A Manager, 220, nd Street, San Francisco, Cali SPIRAL curtain rods; broom Sore ironing board slips. Tremendous sellers. Moore Company, 9005 Jerome Avenue, Cincinnati. ““WE want a live in but no peddiers need apply. Must be able to, furnish reference be competent to represent good reliable firm. Box 541, Marietta, Chio. AUTOMOBILE Signal, Spot Light and Mirror—three accessories in one. Sells on ht. Sample prepaid $12.50. Exclusive territory to right party. Johnson Auto Signal Company, Vancouver, Washington: SALESMEN—Commercial and City Sales- — no previous experience nécessary; t m $200 to $1, and monthly; prepare the “big paying jobs. Write for free book and ee | offer today. Interstate Co Broadway, New York. GENTS: ig money selling great household vention. Sample 25c. Particulars free, Webster Company, 2935 North Clark Street, Chicago. SALESMEN wanted to sell Electric aur Lighters — Moisteners. Salary or Commission. You carry stock o we ship direct. Write for Special Omer.” “Drake Mie. Company, 220 Grand, Milwaukee. Wisconsin. * money or experience require ts wanted at once tect our agents. . No license required. Free samples to boost sales, We positively guarantee the sale of every package. Our compound is nature's iest cleanser. Contains no lye, lime, acid or wax. derful sales plan furnished free. You — Ap to make big money. Hurry, hustle, grab this c Send free sample and proof. Better still, send "1 “tor 10 full BOYS, girls, men or women can mal large Salaries selling Davidson's Famous Candies au to Co No collecting or. deliveries. Send us the orders and = delicious chocolates, caramels, etc., direct hag mers. Exclusive territory given. ticulars mail. H. T. J East ‘Chicago, Tllinois. “AMERICA’S Part in the World War.: troduction by General Pershing Authentic story of sma 8 proud record in the .world’s greatest conilict. Greatest sized, packages and samples sent by p paid parcel post. iy Profit on this onder. Territory t busy at once. Mitchell & y, 301, 1314 East 6kst, Chicago. AGENTS making $200 weekly! Everyone wants it. Formulas for 200 beverages to be made at home. Book form. Send $1.00 for copy and territorv pro epotion. Act ly. Export Agency, Inc., Broadway, ew York. ‘ EXTRAORDINARY Sey for salesman. No. Unlimited - demand. Pleasant and profitable work with best class of public. Particulars and sample. free. Economie Company, Box 61, ‘acoma, Washington. * WOULD extra money help? Earn it in a dignified way tn ‘spare time or establish an entire time. business of your as local oor or district manager for an oa ‘established ficm marketing a nationally advertised household appliance. The 250,000 sold jAave enabled many men and women to earn upwards Reeves Company, Box-51, Milford, Connecticut. * SEND for free catalogue “‘Golden Opportunities."’ Typewritten formulas, trade secrets in every line, chemical analyses. 23 years manufacturing experience. No hum Sat guaranteed. Industrial Sales Ser- vice, 73 Washington, Memphis, Tennessee. $1,000 per Man per County; Strahge invention startles world—agents Ten inexperienced men divide $40.000. Korstad, farmer, did $2,200 in 14 days. per meet a minister, $195 first 12 hours. $1,200 cold cash, made, paid, banked by a. in 30 davs; $15,000 to date. A Not or cold running water bath, equipped for any home at only $6.50. Belf-heating. No plumbing or Sale. Credit given. Send no Write letter or today. Allen Mfg. Co, Bidg., ‘Toledo, Ohio. MAN in each town to refinish chandeliers, brass beds, ——. by_new method. $10 daily without capitai” lence. Write Gunmetal Company, Avenue “F,’’ Decatur, Illinois. PATENTS. Write for Free Illustrated Guide Book. Send sketch or model for free opinion of its vatentable nature. Pighest references. mpt attention. Rea- sonable Terms. Victor J. Evans & Co., 174 Ninth, Wasnington, D. C AGENTS—One cent invested in a “ne ‘ou. clean, honest employment $7 $100. a ngs Specialty Mfg. Association, Division, 251, SALESMEN, high grade, for state and county agencies; practical device rings electric belis forever without bat- teries; made by leading manufacturer. Sound, pei- manent, business; men are already making good money:. EVERY woman wants “Silvoplate’’—magic cleaner that never fails. Sure, easy sales plan; main or slideline; a? profits; prepaid deliveries. Write for free sample. B.Sutton, Manufacturer, D-4, New Canaan, Connecticut. SELL This New Auto: Wonder; Mystic-Cloth solves blurred windshield danger: one rub,- presto! glass stays clear 24 hours; rain or snow, auto or railways— same magic result: agents sold. 30, Mfg. Company, Dept. 191. Toledo, Ohio. of’$2,500 yearly. 000 first month, Security © AGENTS—iere is to $200.00 weesly tion. “and repeat. Every office home 184, Chicag: BIG Easy. uick spec! ow ealers. onderful oppo Desk 14, Jubilee Mfg. Company. devised a remarkable — Plan that will inion make four times as much. This is the grea’ ever offered:agents. We give free the Sale. You can't tose. given. La undry tablets in the world. Farquhar-N.oon Mfg. Dany, R1409 Jackson Boulevard, Chicago, Illinois. Compa, EVERY auto owner can be interested in doubiing the life of his car and tires.. Write for peers of the fastest seller ever offered auto owners. M. , Smover, 275% East.46th Street, Kansas City. ti SIGNS for. stores and offices. Entirely new. $50 week easily made. Chicago Sign System, T-326 River Street, Chicago. AGENTS—Newest invention: ‘‘Inksboon” makes every jae’ a fountain pen. Fast office seller; big profits: demand ng everywhere. Exclusive territory offered. Sample wee. H. Marui Company, Tribune Building, New York. SIDELINE salesmen—we have an attractive line of premium assortments for live salesmen. Commission from $5.00 to yo per order. If you want an up-to-date line, write boney- Canfield Mfg. Company, 4003 Broad- way Street, Chicago, Illinois. WONDERFUL Small Article. Every man _ needs. Agent sold 14 one office, profit $2.45. Carry hundred in pocket. Particulars and 2 samples 25c. Arrow Mfg. Company, 778-C 17th “street,” Milwaukee. AGENTS: _ Free sample outfit, greatest washing tablet proposition. Enormous profits as much as 18c on 25c sale. B. Thayer, 2140-B Clybourn Avenue. Chicago, Illinojs. ENORMOUS profits spon transfer monograms to automobiles, bags, e and quickly applied to a ng. No aletonee. paints, or hand-lettering neces- sary. Sampie free. Wagner Company, Corona, New York, AGENTS: Big profits. Best and cheapest window letters made. — applied. Dime brings five samples. Particulars free. jtaibrite Company, 1115 Second Avenue, New York. or Traveling. Experience unneces- Send for list of openings and full —s. Prepare = spare time to earn the big salaries—$2,500 to 510,000 a year. Employment service rendered Members. National delesmen's Training ‘Association, Dep’t 126 s; Chicago, Illinois. EASY, pleasant work for Mechanics, Shop Men, Clerks, during spare hours, will dollars their want persons who give full tim Big .w: Novelty Cutlery ¢ Con 27 Bar St., Canton, ‘Ohio. WONDERFUL ne—Seven column ¢a- ity—tretails for one dolla: Sells itself everywhere. ost offices purchase seyers! ral. ency pro} on. L. J. Leishman Co., Dept. F, Ogden, Utah. a Week and your own suit free = wonderful xtras free— write your name and address on a postal. American Woolen Mills Company, Dept. 1407, Chicago. AGENTS: Sell rich looking 36x38 imported ey 1.00 each. Carter. Tenn., sold 115 in 4 days: 7 ou can do oy Write for sample offer | ng | plan; exclusive terri Sample rug by parcel post pi d $1.19. E. Condon, Importer, 12 Pearl Street, Boston, Massachusetts. AMAZING new invention, marvelous adding machine. Retails $ Adds, subtracts, multiplies, divides auto- work of $300 machine. Fi ntee. Offices, stores. factories buy from one to jozen. Ever, demonstration sells. Liberal profits. Write quick for protected territory and — offer. Cal- tor ration, Grand Rapids, Mich AGENTS make 500% profit ‘auto mono- ams, new patriotic a window letters, transfer and novelty sigts. Catalog free. Hinton. Com- pany, Star ‘City, Indiana DAVIS’ “Lucky Leven” “37” of other big wi =. for $1.25. 1 fit. ma position: E. M- Davis, Dept. 51, Chi n up. atalogue ment Company, 421 Eighth Street, Cincinnati, “LIBERTY Out-O-Sight. suspenders, every man. No straps over shoulders; no ged belts Bur- nished aluminum sample Agen’ wanted. Act. quickly Liberty Suapender Company, Tis, St. Louis. $5.00 to $25.00 daily monogramming automobiles, etc., with Globe Transfer Initials. Particulars free; samples 10¢ Globe Decalcomania Company (Factory), Newark, New Jersey West of Rockies,-1785 Green Street, San Francisco KEROSENE Burners for Furnaces, Cook and Heating toves. Economy Mfg. Company, 616 West: :Monroe, Chicago and sell your own “Machinery unneces- Expert chemists advise. Special attention to Beginners ‘Write for “catalog. Elmer Mystic Company, Washington, D SPLENDID _ opportunity live sales managers to control City, County and State agencies for ‘‘Rexblu.” Stevens Wiley Mfg. Company, Inc., Fairhill and Dia- mond Streets, Philadelphia. Blo ag re angel properly a: is worth at least $10.00 Write week 225 West 39th Strect, New York.” AGENTS—Steady Income. Large manufacturer of Handkerchiefs and Dress Goods, etc., wishes representa- tive in each ae. Factory to consumer. Big profits, honest goods. Whole or spare time. Credit given. Send for particulars. Freeport Mfg. Company, 24 Main Street, Brooklyn, N. Y. AGENT wanted! Fast selling household article. Over hundred per cent profit. Send ten cents for sample and particulars. American Sales Service, 124 South American Street, Philadelphia, Pennsylvania. AGENTS—Onr soap and toilet article plan is a wonder. Get our free sample case offer. Ho-Ro-Co., 130 Locust, St, Louis, Missouri. “WANTED Salesman—Side or main line to sell low guaranteed tire. Good money making proposition ‘or live wire. Write, Consolidated Auto Tire Outlet Co., 616 So. Michigan Ave., Chicago, Illinois. HERE’S a line you can sell! Big profits too! Fruit spices, extracts, toilet articles, vegetable soars. medies, household preparations. Over 125 products all guaranteed. Branches at New York City, Memphis, . San Francisco, Winnipeg and Hamilton give prompt shipping service, low freight rates. Ours is the oldest, largest and most —— agency house in the world. Particulars free Write today. Dept. 14., The J. R. Watkins Company, Winona, Minnesdta, INSYDE Tyres, inner armor for Automobile Tiros, prevents “og a double mileage of any tire. Lib- eral profits. Det American Accessories Co.. Dept. Ohio. SIGN Agents to represent us in your locality Un- limited field, samples and particulars free. Interstate Sign Company, 2624 North Halsted Street, Chicago. WHETHER you are or are not a salesman you can with a permanent income by handling our $5 to $15 yearly premium Accident and Sickness to benefits with -50 to ears, $7, weekly indemnity. : Both sexes, 16 Certificate in Million assets. For exclusive territory address Southern Surety Company, 308 Walnut Street, Philadelphia. Fy 5 $50 weekly taking orders for fast ng Goodyear raincoats. Hundreds of orders waiting. $22 an hour. for spare time. Barri mace $17 in 3 hours. Palmer made $146 in one 7. We deliver and collect. Sample coat free. y for agency. Goodyear Miso 802 Building, Kansas City, ne ERE you ever offered a grocery store? You ca die, Sugar. Flour, Canned ' a. Dried Fruit, Coffee enitire lin line of Groceries, well as Paints, “Roofing, luminum Ware and ‘Automobile Oils, with no rent to Yy; mo money invested; take large orders from samples. ——— and proven quality. Selling - perience necessary. Steady, profitable work for © Svorkers.” — Hiltchcock- Hill Company, Dept. 220, Chicago, Illinois. Reference: any Bank or Express Company. WONDERFUL invention: every one buys on _ sight; Duplex Automatic Hair Cutter, cuts perfectly while you comb, long or short: 230 per cent profit. agents making $200 a week. Duplex Mtg. Company, Dept. R, Detroit, chigan. AGENTS—200% Profit! Wonderful little article, at once for free sample: ills, American Building, Cincinnati, Ohi Me. NEW Windshield Cloth solves toa wipe cleans rain-blurred windshield. ae. hours. Motorists amazed. Agents gettitig rich. Exclusive territory. Cabco. Company, 0. *SALESMEN to sell oils, belting, paint, roofing, root cement, general supplies, to garages, factories, mills, stores, auto owners, farmers, threshers. Splendid proposition, Paid weekly. O. L. Doty, Dept. "34a0 Cleveland, Ohio. See beautiful fabrics and styles. Establisned years, Every garment made to guaranteed and express prepaid. Just send American Woolen Mills Company, Dept. 1407, Chicago. Jackson Boulevard, Chicago. $3.50 per day paid one man or woman in each town to distribute free circulars for Economy_ Non-Alcoholic flavoring. Permanent position. F. E. Barr Company. 602 ‘Lowell Building, Chicago. GENTS—Make a dollar an hour. Sell Mendets, a patent patch for instantly mending leaks in all utensils, Sample package free. Collette Mfg. Company, Dept. 467, Amsterdam, New York SELL the line that hasn’t been worked to Ly 35 ry territory available. Promotion for producers. ‘Modern factory and convenient distributing houses assure good service. North Ridge Brish Company, lsc Clark Avenue, Illinois. NUTES Pay Dollars demonstrating new v $10.00 Adding Machine. Wonderful invention, Adds, Sub- tracts, Multiplies, Divides, automatically. Whirlwind in speed. Infallibly accurate. Work equals $200 machine. Offices, stores, tactories buy from to dozen. ormous * demand everywhere. B Write for trial offer protected Corporation, Dept. O, Grand Rapids, TS: Reversible raincoat. Biggest seller ever ME ak Something new Latest stvie. Not sold in stores. Guaranteed waterproof. Two coats for the price f one. No capital required. We deliver and_collect. te .for_ territory and sample. Thomas Guin 1461 North Street, Dayton, Ohio. - PORTRAIT Agents.—Get our new catalcg if you want quality and service. The old reliable. Fidelity Portrait ept. L., 3047 West Harrison Street, Chicago, llinois. DELIGHTFULLY scented sachet envelopes. Quick, profitable seller, through sub-agents, boys, girls, premium use 3 packets, particulars, sent for dime. U ert, 64 Redford Street, New York. SENSATIONAL Ford invention! Ford owner by lifetime for agents! Write Gasoline Economy Cane 1608. Colonial” Trust Building, EVERY home on farm, in small town; or suburb needs and will buy the wonderful Aladdin coal-oil mantle lamp. Five times as bright as electric. Tested and recommen by Government and leading universities. Awarded fold medal. One farmer cleared over $500 = six weeks. Bun dreds with by or autos earning $100 to $300 per month. No experience needed. Excellent ime and, evening seller. No’ reapital Write quick for distributor's proposition an jemp tor ee trial. Mantle Lamp Com- pany, 918 Aladdin aoa Chicago. CANVASSERS—Crew managers—A lifetime opportue nity with a nationally advertised household device which sells rapidly in big city, town and country. Salesmen every where making big money— Detroit crew averaging one sale every four calls. You can pe TIT Don’t delay. Write Company, 11411 Locust Avenue, Cleve jan io AUTOMATIC Links—Cuffs over elbows ‘instantly without unbuttoning; lowered they close autumatically. Sell like wildfire; great convenience and shirt saver. Enormous demand; no competition hiberal and exclusive territory for real salesmen. Sample pair $1.00. o Mfg. Corporation, Sheboygan, Wisconsin SPIRAL Curtain Rods; broom protectors; ironing board clips. Tremendous sellers Moore-Company, 900 = Avenue, Cincinnati. ENTS—One cent invested in a postal card brings you Giss100 per week three-in-fuur repeater proposition. 7 Mig. Company, Division 251, Madison, Wis- THE police key is as serviceable as a whole bunch ch of ordinary keys, opens almost everything; every house owne? should have. one. Sent postpaid on receipt of 20c; three for 50c. Safety Key Holder free with every key. Sharpe Mfg. Company, Paterson, New Jersey. KEROSENE gas burners in cook stoves; stop use of wood or coal. Patented Get exclusive territory. The Vapor Gas Burner Company, Desk 9, Columbus, Ohio. SIMPLE Wireless Telephones and How to Make Themr A good book for the advanced radio amateur on the rinciples, construction and use wireless telephone. ce, 25 cents postpaid. Boo Popular Science Monthly, 225 West 39th Street, New ork City. Mitchell's Magic Marvel Washing Compound; 300% profit; enormous repeater. Own your own _ business. Be Astounds and delights every woman who uses it. Nothing en like it on the market. Splendid proposition for general pt = agents. We grant exclusive territory and absolutely pro- be tunity for money-making. Special terms. eig Credit. given. Outfit. free. McCurdy ‘Company Pad. ‘ holders sell to every man »ou show—they better than any on the “mark diferent and i every woman you call on at least oné dollar's wor world famous N-R-G Laundry Tablets, now : daily in more than a million homes. We are the origi- eae . = = nators of this famous product, and while there are many i imitations, none will do the work of N-R-G. Our agents , make big money, and with our new se Plan they will test proposition and Guarantee wet more agents, TAILORING ‘Agents Wanted—Big comrlete sample baie outfit and case, nearly 200 large cloth samples, 4-price lists a and everything needed for canvassing, or use in store, free ae = to live agents. $25.00 to $50.00 a week; may make more. territo! eing rapidly assigned; references and previous perien essentia Betts & Corporation, Bet NEW Cacburetor for Ford Cars, simple, not a moving hee —— — part, installed in thirty minutes, guaranteed to double E. your mileage = start in zero weather without heating or ‘fy priming. 15 days free trial. Our St. Louis man sold Rey 2000 in 8 months. Salt Lake City man made $1200 in one | | >: easy $1 a Vv quite « m for ng our < delivery charges vrepaid—Self measuring blanks, style me charts, sample box etc., free. Send no money. Just Leather Wallet with each policy. Liberal ions wit ntinuous renewal agreement. 23
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Halt afi | al ran! nerican '21 Ruby and Sapphire Jewels— Adjusted to the second— Adjusted to temperature— Adjusted to isochronism— Adjusted to positions — 25-year gold strata case— Genuine Montgomery Railroad 1 New Ideas in Thin Cases. And all of this for$3.50—only $3.50 per month—a great reduction in watch prices _—direct to you—positively the exact prices the wholesale Acker would have to pay. Think of the high grade, guaranteed watch we offer here at such a remarkable price. And you wish, you may pay this price at the rate of $3.50 a month. Indeed, the days of ex- f/ orbitant watch prices have passed. Writc now. You don’t pay a until you see the watch, You don’t buy a Burlington Watch without seeing it. Look at the splendid beauty of the watch itself. Thin model, handsomely shaped—aristocratic in every line, Then look at the works, There you will see the master- piece of the watch makers’ skill, a perfect timepiece adjusted to positions, temperature and isochronism,. Practically every vessel in the U.S. Navy has many Burlington watches aboard. Some have over 100 Burling- tons. The victory of the Burlington among the men in the U. S. Navy is testimony of Burlington superiority. Send YourName on This pt.1368 IF, C Get the Burlington case send me (orithout obliga: ra ee Ou Om Watch Book. by sendin g on watches with fvll explanation of PA our cash or $8.50 a month offer on this coupon now. You will know a lot more about watch the Burlington Watch, a buying when you read it. You will be able to ‘‘steer clear’’ F of over-priced watches which are no better. Send the Name. coupon today for the watch book and our offer. : | Burlington Watch Company Addr oe 19th St. and Marshall Bivd. Dept. 1368 Chicago, lilinois Canadian Office: 355 Portage Ave., Winnipeg, Man. r 4 Rapids, er ever sold in he price collect. taincoat : ou want Portrait llinois. Quick, remium, i Bedford reports ance of 3 om pany, rb needs le lamp. umended led fold i s. month. evening ributor’s ap Com- opportie ce which yn every one sale Write e, Cleve sunch of se owner 4 three Sharpe > of wood ke Thenr lephone, Science
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HELP WANTED BECOME auto experts. Hundreds needed. $35.00 week. Earn while learning. Franklin Institute, Dept. K803, Rochester, New York. BE A Detective—Big pay; xb work. Write Wagner 186 East 79th Street, New xork, Dept. 425. ch needs | ately thousands of men and women over 18 A all kinds of work. You owe it to your- to inv Just send ad name, number RP2 free information and advice. Earl Hopkins. Washington, D. C. HUNDREDS government jobs open to men—women’ $1000 $1600 year. Pleasant work. Paid vacation. Com- on education sufficient. Write immediately for free fist positions now open. Franklin Institute, Dept. J-50, ‘Rochester, New Yor $25 to $50 week in this new and fasci: nat ne pr W Write—find out how you can ustra about finger nts. University of Applied Science, Room 9208, 1810 Witten Avenue, Chicago, Illinois. ENTER a new business. Earn $3,000 to $6,000 yearly in professional fees making and -fitting.a foot specialty, openings everywhere with all the trade you can attend to; easily learned rned by anyone at home in a few weeks, at small expense; no further capital required; no goods to buy, ~~ hunting, soliciting or agency. Address Stephenson Lab- oratory, 15 Back Bay, Boston, Massachusetts. HURRY! Our First Issue. Flans and specjfigations for — National Advertising Weather Servige, Six feet ht. Standard tested instruments, Agent's profit $15 oy 0U. Twelve card capacity. Descriptive titera- ture, terms and picture, 25c. None free. National Sajes Company, Box 421, Lima, Ohio. STAMP Names on Key. Checks. Some earn $50° gene 25c for tag and inetrestions, return if required: P. 8. . Keytag Company, Cohoes, New York. yo ne sell perfume and toilet goods for others? Make own! Particulars. Laboratory, Box S1316 Mempnis Tennessee. Made $30 a week, easy money, evenings, home. Free booklet explains. Send mp. Al Scott, Conoes, New PATENTS Procured—Trade Marks Registered—A comprehensive, experienced, prompt service for the pro- tection and development of your ideas. Preliminary advice gladly ed without charge. Booklet ‘ot informat' = and form for disclosing idea free on —S- Richard B. Owen, 44 Owen Building, Washington, D. C., 2276-Z Woolworth Building, New York. EXPERT Chemist will — — and Trade Secrets in all lines. Lists free. L. Cummings, Ph.D., Gordon Avenue, Syracuse, New york” GOVERNMENT positions are desirable. $1000-$2000 . to our exvert (Former Government Exmainer) ou. Free booklet. Patterson Civil Service hook, Box 5026, Rochester, New York. . MEN—Aes 17 to 45. unnecessary. Travel, make secret investigations, rep Salaries, expenses. American Foreign Detective ao 321, St. ‘louie WRITE Photoplays: $50 each. Experience unnecessary details free, to beginners. Producers’ League, 194, St. Lowis. BE a Mirror Expert, $3-$10 a day; weare time home at first; no capital; we train, start you maki: 1? and silvering mirrors ch: method. Free Fra W. F. Derr, Pres., 579 Decatur Street, Brook N..Y rite im Franklin Institute, Dept. New York. STOP daily grind si rth while. I start you silvering mirrors, plating tableware home. Sure income. Plans free. Clarence Sprinkle Dept. JC, Marion, Indiana. $3,000 salary paid county managers, selling tires to sumers at 30% discount. Station” Box 65; Greveland. VULCANIZING auto tires growing and_profitedle business, ne! now. Easy to learn. Instruction — $1. nts $50 a. Catalogue free. Equipment Company. 423 Eighth Street, Cincinnati, Ohio. BE detective. Excellent opportunity, gore. travel. * Write C. T. Ludwig, 424 Westover bide. City, Mo. “DOLLARS Yearly in your backyard. No ginse a dope. New ideas.. Investigate. Particulars free. C. Mets, East 89th st New York. Mail 966 Broadway, New York. inner armor for automobile tires, and prevent punctures and blowo-ts. applied. Cost little. Demand tremendous. . unilmited. Details free. American Automobile ayes Co., Dept. 97B, Cincinnati, Ohio. ARTISTS in great demand. Big salaries paid for full Goumercial Art, “Cartoning, “ittustrating, Designicg: ‘ e "Send for handsome Free to a Book. Write now. Washington School of Art, Inc., 455 H Street, N.W., Washington, D. C. BE a Bh Good incomes. Excellent. o - tunities tra’ vel. Particulars free. Write American School of Detroit, “WRITE for newspapers and azines. Experience unnecessary. Copyright book ress Revorting Syndicate, 4005, St. Louis. MR. ADVERTISER: copy of the some reallv important facts which will prove: interesting oad b. — Ai, to you. It also tells ‘How You Can Use Popular Science Monthly cay You'd like to know, wouldn't you? Ma Classified Advertising, Popular Science Monthly, 225 West 39th Street, New York. BE a detective. Excellent opportunity, — pay, travel. Write C. T. Ludwig, 424 Westover Bldg., Kansas City, Mo. RAILWAY Traffic Inspectors: $110.00 a month to start expenses. Tra if desired. Unlimited ad ment. e months home study. Situa- tion a Stan or, permanent position. Write for booklet CM13, Training Institute, Buffalo, New Y GOVERNMENT tions highly desirable; thousands pointed annually through uent examinetions every- Steere prepare immediately for Post ace Clerk, City or Rural Letter Carrier, Railway ‘Mail C Washington ‘lerk Typist: unexoelled correspondence instruction, $5.00. Psccuest particulars concerning position desired. Federal C:vii Service School, 600 Kellogg, Washington, D. C. WOMEN to Sew. Goods sent vrepaid to ge door; Plain sewing; steady work. canvassing nd stamped envelope cor prices paid. niversal Company, Dept. 50, Philadelphia, practical inventions. Trade fof Fister perty. panies. Sell county rights. Adam fg. St. Louis, Missouri. “WOULD you like to study law in your spare moments. T have a splendid opportunity to offer you. Send me our name and address right now. C. F. Dunlap, 1027 Aanhattan Building, Chicago. AGENTS wanted to sell chewing ball vending ma- chines. 59W Drexel Building, Phils ep _Penneyivan® MR. ADVERTISER: Ask toda & copy = od “Quick-Action Advertising Rate older." It con some really important facts which will p! Classified Advertising, Popular Selence onthly. 2 225 est 39th Street, New York. JAPANESE manufacturers’ directory, English Edition. Do business direct with the manufacturer in Japan. Price $2.51 50. R. B. Brenneman, Hammond, Indiana. ““WANTED—Ambitious workers everywhere, to estab- lish be independent, make big income yearly, =. capital required; we train and refer. b ‘ou: “Scientific Facts Free. National Col.ection ureau, Dept. 5, Columbus, Ohio. FOR SALE--Dividend-paying oil royalties and leases: Sarees Perry D. Plain, 233 Jackson Avenue, Wichita, Kansas. DO business by mail! Join Amertoan Syndicate; par- ticipate in profits. We furnish everything. cae con- fidential terms, 10c. 311 Roberts, Building, Los Angeles. YOU can earn your way and learn the new profession— earning $3000.00 a year and upwards. Easy to learn. Send tor our plan of courses. oward ‘System, ‘South Ashland Boulevard and: Harrison Street, Chicago, Illinois. PUT your name over the door! Control exclusive busi- .ness without ——— Employ others. Almost po capital required. Qui results. Send $1 to Home Devices Company, a. New York. LET me represent forwarded from here, 5e ==: 6 for 25¢ monthly. Kennedy's mailing. { —— work, woodworking, repairi Quick-Action advertisements continued from 14 STAMPS—50 Varieties, Transvaal Brazil, Mexico, etc., and Album 1 different Cuba: 1,000 hinges 10c. “1,000. mixed, tee. siamps. C. Stegman, 5949 Cote buy CALIFORNIA gold, quarter size an imbia Nicker Two cent and catalog, Cofambla Nickel, Union Star, M Shults, STAMPS, Belgium large bicolor) Ching Jamaica, Portugal, Venezuela, China -40c; 100 varieties U. S., hinges,” Oc; Agents ar America. Buy direct. 1,000 fine assorted Paraguay, Uruguay, etc., for $2 bill. Exchange stamps with and dealers; lotsall on sheets, ee Necochea 193, Lomas Dezamora, A EST one cent approvals in Ameri “P. Haat 1117 South Phijadelphia, 100 Different Stam 10¢; Michaels, 5600 Prairie, Chicago. CALIFORNIA Gold, si size, 53c. Dollar size, si. Lists tree foreign coins, 25c; 10 0 Uruguay for Toledo Stamp Company, Toledo, oF 10e, Baska. 2A Bowen, Dayton, Obie’ different, postage Ze, Stamp Company, 158 North Walla dale, New York. 50c. Fred Onken, 630 79th Street, BOOKS AND PERIODICALS 100,000 conend-pent, books for sale, 25c; costly bind- some cost $25. new; business, advertising, m, medicine, electrical, ery; school opediag: correspondence, texts, encycl sclentific’ history, travel, fiction, dictionaries, law, oi osophy, salesmanship, machinery, mechani mysterious, mathematics: send 10c stamps for (aone free). am lai tt used book dealer in hay cCarthy, 1061 West ven Buren Street, Chicago, I is” BUY Amsco Best Books. Wise peopl your favorite You shoul cal, them. = tonight for e, circulars, Dept, Fi, Aurora, Illinois. “MOTOR ANNUAL, 1920, describes more than 400 five cents and be sure of getting # cop ag ular Science Monthly, 225 West 39th Street, New York. . Book (for shop use) on Auto- $1. Tire a Company, 368 Ohi “SUBMARINE in Wir and Peace,” by Si i the submarine inventor. A thrilling of ‘the a. boat that changed the history of the world. m4 West 39 Book Dept., Popular Science Mant, 39th Street, New York. Books. Bargains. Catalog. Higenes. Post. San Francisco. (Books Bought.) - FREE to our readers! How can 1 improve myself How can I make myself more proficient and thus earn more money, You don’t have to go to colleg never went to college. But he has, helpful, ractical books on electricity, mechanics, engin eering, wireless, automobiles, airplanes, sheet ng, or any other subject, write tor Popular Science Monthly’s new book ca‘ The books described in it have been carefully selected by experts ted to = of<Popular Science Monthly read: ur book See A postal request ‘will ‘bring it. roe Department, Popular DETECTIVES earn big money Cpocepentiins for travel. We train you. Particulars free. Ameri- can Detective System, 1968 Broadway, New York. BUSINESS OPPORTUNITIES MANUFACTURER with eee financial resources de- sires = articles to manuf: = referably farm im- into large Ox 1836, Belleville, ennsylvania half. Fine profits building and furnish motors, tone arms and necessary - p: for our catalog and Free blue print offer. Choceiven Phonograph Company, 1123 Monger Building, Elkhart, Indiana. ment or previous experience necessary. hustler want an opportunity tv make $5,000 or more & year, we want you, my will pa sr well from the start. . Send your application anager Dept. 657, South Franklin Street, WE start you in business, furnishing e ng. Men and women, 330. 00 to $100 60 weeklv Soerat ng our “‘New System Specialty Candy Factories’ anywheie. Opvor- tunity lifetime. Booklet free. H. Ragsdale Company, East New Jersey its and Belgian and breeding, shipping, 10c. Hunters’ housing” Teed Valley Yor “4 HAVE vs a provost position to finance? Does your business Deed money us protien. Write K. J. est Thirty-Fourth Street, New BEGINNERS—Complete ‘‘Mail Order System; Ad- Gress Box 1005, Atlantic City FLEMISH oy F- ian_ Hares: $1.00 pound for al you raise from ¥ hic Cavies, white ae. Stamp A. J. Norwood, Ohio BIG raising Belgian We pay $6.00 r express.° ‘ative Be. St. Wisco: SUBSTANTIAL manufacturing corporation wants ble men to establish —e and manage salesmen; to $1,500 necessary, vou handle own money; will silow expenses to Baltimore will For par- Secretary, 416 Howard Street, North timore, Maryland STAMPS AND COINS * 158 Genuine Foreign Stam Mexico War Issues, Venezuela, Salvador and I Service — a. China, ete , only 10c. Finest Approval Sheets 50% to 60%. Agents wanted. Big 72-p. Lists Free. uy Established 25 —. ussman Stamp Com- pany, Dept. 55, St. Louis, M Monthly, 225 West 39th Street, New “as City. with profitable 10c; six m 25c, 1 Los Angeles. EE to you—Anyone of these $1.40 books—"Auto- Troubles and How to Remedy Them,” “‘Automo- and Ignition, Timing and Vaive Setting, “Self-S Highting, ** including Ford System, Motor Trucks, ‘Chapter on Ford: “A B C of the Motor- and Oil Engines:"’ ‘‘Cement; Its Uses; posto Daid FREE to you if you will send us re yearly subscriptions to Popular Science Monthly at $2.00 each. Popular Science Monthly, 225 West 39th Street, New York. CONCORDIA contains essavs, formulas, plans. Bh omens tion 50 cents, trial 20 cents. Concordia Maga- , 11 Water, York, *Pennsylvania. SIX American and *25c. Durso = 42, 25 Mulberry, New York City. British year seventeen ninety- aa, Write for particulars and price of io. John M Ridier, 416 North 4th Street, St. Louis, Missouri. 47 Stamps. Wide-World Variety, no 97c, only 6c. with universal appro gr West Fort Ann, New Yor D Coins e Fall a Catalogue of coins for icin, 104 for coins, ten St cents. William reet, Dept. P, Boston, Massachase' FREE, 6v different stamps including Newfoundland, Japan, - or our high grade vals. Send stamp for return stage. The wood Stamp , Bf Dept. M., Milford, Conn. STAMPS, 61 All Different, cents. Mertion Quaker Stamp Co., Toledo, Ohio. to $600 paid for hundreds of old coins dated before boo x may mean Clarke & Co., Coin Dealers, - Box 76, LeRoy, N. es PACKET “A” 100 foreign stam: Pope, Charlotte, Vermont BURN ashes instead of coal! Save 50% to 75% coal; for free details. Blocm’s Money Saving Fuel = 564 . Central Avenue, Brooklyn, New York. 17 Varieties Hayti anion 20c. List of stam free. 7000 varieties low iced Chambers Stam; St., New York City. “"ELECTRICIAN’S Wiring Manual, by F. E. Seng- k, E. E., contains all the essential information needed for the proper installations of lighting and 4; systems in houses and other buildings. This manual is —s = and form’ size, flexible bin , 448 es. Price, $2.50 pos poste. Book Department, Popular lence Monthly, 225 West 39th Street, New ‘York City. BUY _ books for Christmas. Latest popular fiction at unheard of low prices. Send for our complete list. You'll save money. _ David Stern Company, “Value, Service, Satis- faction since 1885,’’ Chicago, Illinois. ASTRONOMY for. Amateurs. ere is your oppor- tunity to satisfy that longing to kno yy: about heavenly bodies and to read the sky on a starry nigh’ Written = illustrated 80 as to be within ~ asp of the average Price, $2.00 10c. Book Dept., Popular "Science Monthly, 225 West 39th Street, New York City. EXPERIMENTAL Wireless Stations—Bargain Price. For boys just beginning radio this is an excellent book. The park systems and crystal-receiver ae. de- are adequate for anyone who wishes to start dut in new edition is $1.50. Book Dept., Populer Science Monthly, 225 West 39th Street, New York City. = ee IF you desire a position as wireless operator. worth $225 te 5 per month, we should like you to investigate our cor- respondence course by sending for catalog. We operate eg the one big radio school of the world and are eee. out ai the winners. Write today. Service Radio School, Dept. | = __ has ent — nd who have t purchase it. The 400 other advertisers in this “a are getting direct, profitable and continuous ts at = low cost. If you want to know what they think of Pop. <4 ular Science Monthly, write D. W. Coutlee, 225 Wi ‘ cD age B, etc. | boy hed- ing | a and valuable to you. it also tells “HOW You Can Use Popular Science Monthly Profitably like ideas ta,the automobile owner, manufacturer, dealer and he | s kind | | want chan BRANCH monet wanted by old established Chicago concern. We sh full stock gocds, | te and will also pay you liberal share of the profits your store Po Boats—Construction and Operation.’’ ‘‘Questions and a many years’ experience on the Chicago Board of Under- — a writers. Profusely illustrated and contains many tables a : So the radio field. Complete instructions for sending and pee a — receiving apparatus are included. To dispose of a few
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ag il fal EE all How Feels Earn $1000 Week By a Young Man OW does it feel to earn $1000 a week? How does it feel to have earned’ $200,000 in four years? _ How does it feel to be free from money worries? How does it feel to have everything one can want? | These are questions I shall answer for the. benefit of my reader out of my own personal, Tells. How He Accomplished It money-raising ability. in all-other ways we were the same. > Determined to find out what that’ vital spark of success is, I bought books on every subject that pertained to the mind. . I fol- lowed, one idea after another. But I didn’t seem to get anywhere. Finally, when almost i in si a , | came across a copy of ‘‘ Power experience. And I shall try to explain simply discouraged, I ly the secret of what my friends call, of Will,’ Like a bolt out of a clear sky there ey et , flashed in my brain the secret I had been my phenomenal success. “Let me begin four years ago. At that time ' my wife and I and our two babies were living on my earnings of twenty-five dollars a week. We occupied a tiny flat, wore the. simplest clothes, had to be satis- fied with the cheapest entertain- ment—and dreamed sweet dreams of the time when I should be earn- ing fifty dollars a week. That was the limit of my ambition, * In- deed, it seemed to be the limit of my possibilities. For I was but an average man, without in- fluential friends, without .a lib- eral education, without a domi- nating -personality, and without money. With nothing to begin with I have become the sole owner of a business which has paid me over $200,000 in clear profits ie during the past four years and |i which now pays me more than & a thousand dollars a week. . 1 | business is not a war baby—on the contrary many others in my line have failed since the war began. ' In four years the entire scheme of my life, has changed. Instead of living in a two by four flat, we occupy our own home, built for us at a cost of over $60,000. We have three automobiles. Our children go to private schools. ‘We have leverything we want, and we want the best of everything. Instead of dream- ing of fifty dollars a week I am dreaming in. terms of a .million dollars—with greater. possibility of my dream coming true than my former dream of earning fifty dollars a week. What brought about this remarkable change? What transformed me, almost over-, night, from a_slow-going, easily-satisfied! average man—into a positive, quick-acting, determined individual who admits no de- feat, who overcomes évery obstacle, and who completely dominates every situation? It all began with a question.my wife asked me one evening after’ reading an article in a magazine about a great engineer. who was said to earn a $50,000'salary. : “How do you suppose it feels to earn $1000. a week?” she asked. And without thinking, I replied: “I haven’t the slightest idea, my dear, so the only;way to find out is to earn, it.” We both laughed, and soon the question was apparently forgotten. But that night, and for weeks afterward, the same question and my reply kept popping into my brain. I began to analyze the quali- ties of the successful meri in our town. ‘What is it that enables them to’ get everything they want? They are not better educated than I—indeed, some are far less intelligent. But they must have possessed some quality that I lacked. Perhaps it was their mental attitude; perhaps they look at things from an entirely different angle than I. Whatever it was, that ‘‘something’’ was the secret of their success. It was the one thing that placed them head and shoulders above me in did not gamble. I did not make my money in Wall Street. My “How Do You Suppose 'It Feels to Earn $1000 a Week2” She seeking. There was the real fundamental . principle of all success—Power of Will.. There’ every successful man, possesses. - “Power of Will’? was written by Prof, Frank Channing Haddock, a scientist, whose name ranks with such leaders of thought as James, Bergson and Royce. After twenty years of research and study he had completed the most thorough and constructive study of will power ever made. I was astonished to read his statement that “The will is just as susceptible of development as the muscles of. the body!’ And Dr. Haddock had actually set down the very rules, lessons and exercises ‘was the. brain faculty I lacked, and which ‘by. which anyone could develop the will, making it a bigger, stronger force each day; _ simply through an easy progressive.course of. training. It is almost needless to say that I at once _began to practice the exercises formulated by Dr. Haddock... And I need not recount the ‘extraordinary results that I obtained almost from the first day. Shortly after that I took ‘hold of a business that for twelve years had been losing money. I started with $800 of borrowed capital. During my first year I, made. $30,000, My second year paid me $50,000. My third year netted me $70,000, Last year, due to increased costs. of materials, my profits were only $50,000, though my vol- ‘ume of business increased.. New plans which ‘I am forcing through will bring my profits for the present fiscal year up to $65,000. Earning a thousand dollars a week makes’ me feel secure against want. It gives me the money with. which to .buy whatever will ‘make my family happy. It enables me to take a chance on an investment that looks good, without worrying: about losing - the money. It frees my mind of financial wor- ries.. It has made me healthier, more con- - tented, and keener minded. It is the greatest recipe I know for happiness. Who Four Years Ago Drew $25 a Week Salary. _ Prof. Haddock’s lessons, rules and exercises in will training have recently been compiled and published’ in book form by the Pelton Publishing Co., of Meriden, Conn. I am authorized:to say that any reader who cares to examine the book may do so without send- ing any money in advance. In other words, if, after five days’ ,reading, you do not feel that the book-is worth $3.50, the sum asked, return it and you will owe nothing. . When you receive. your copy for examination I : suggest that: you first read the ‘articles on the law of great think’ ing; .how to develop analytical powers; how to perfectly cone centrate on any subject; how ta guard against.errors in thought; ‘howto drive from the mind welcome thoughts; how to develop fearlessness; how to use the mind in’ sickness; how. to . acquire a, dominating personality. Never: before have busiriesg ‘men and women needed this help so badly:as in these trying times, Hundreds of real and imaginary obstacles confront us every day, and only those who are masters of themselves and who hold their heads: up will succeed. “Power of Will,” ‘as never before, is an absolute necessity—an investment, in_self-culture which no one can afford to deny himself. Some few: doubters -‘will” scoff ‘at the idea of will power being the fountain-head ‘of wealth, position and everything we are striving for, But the great mass of intelligent men and women will at least investigate for themselves by seriding for the: book at the “publisher’s risk. -I am sure that any book that has done for me—and for thousands of -others—what “Power of Will’’ has done—ig well worth investigating. . It is interesting to note that among the 350,000 owners of ‘‘Power .of Will” are such prominent men as Supreme Court Justice Parker; Wu Ting Fang, exe U. S. Chinese Ambassador; . Lieut.-Govy Asked. McKelvie of Nebraska; Assistant Postmasters . General: Britt; General Manager Christeson, of Wells-Fargo Express Co., E. St. Eima@ Lewis; Governor Arthur Capper of Kansas, and thousands of. others. In fact, today “Power of Will” is just’as important and as necessary to a_ man’s or woman’s equipment for success, as a dictionary. To try to suc- ceed without ‘‘Power of Will” is like trying to do business without‘a telephone. ' As your first step in will training, I suggest immediate action in this matter before you. At is not e.en né_essary to write a letter. Use the form below, if you prefer, addressing it to the Pelton Publishing Company, 14-T Wilcox Block, Meriden, ‘Conn., and the book will come by return mail. This one act may mean the turning point of your life,-as it has meant to ‘me ‘and to so many others. The publisher feels that so great a work should be kept as low priced as possible, but in view of the enor- mous increase in the cost.of every manufacturing item, the present edition will be the last sold at the present price. The next edition will cost more. IL urge you to send in the coupon now, PELTON PUBLISHING COMPANY, | 14-T Wilcox Block, Meriden, Conn. | I will examine a‘ copy of ‘“‘Power of Will” at your risk. I agree to, remit $3.50 or remail the l book in five days. : e ed | K-2441 myself = he finest | yu want Science : ; catalog. ected by readers. Popular | 4 dealers, 1S, 250, | —** Al | Trucks, | Motor- “Motor ns and line and i FREE ‘tions to r Science . Years a Maga- ©. Seng- n needed systems Titten in eer with f Under- : ly tables Pocket | 25 West | gs iction at t. ice, Satis- r oppor- ry night. sp of the c. Book | h Street, in Price. ‘nt book. ‘atus _de- rt out in ding and of a few 5c. The
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BECOME A are you inclined? Come tothe Sweeney = 1. Learn to be .an expert. I teach - with tools not’ books, Do the work yourself, ff . that’s the secret of the (Call SWEENEY SYSTEM. yractical trainin; ng b by which 5,000 iers were train S. Gov- | ernment. and over 20, Bey Learn in atew io previous ence necessary. - FREE Million ‘Dollar Trade School. = LEARN A TRADE, ‘ourteen-volume Law /youentoll now. Get our valu; and “‘Evidence’’ . Gui Send for them—NOW. . LaSALLE EXTENSION UNIVERSITY - ; ‘Dept 1183-L. Chicago, Il. Guise and. Gre or. page bode on Stamniering Stuttering. i myself after 660 Bogue Bldg. Library books free. AUTO- OL 42 SWEENEY BLDG. KANSAS City, ro, BENJAMIN N. BOGUE dianapolis, Indiana Get Bigger Pay eed ialized knowle dg Your ‘cal forces and command the hich ‘salary of an electrical expert. Suc- cess in electricity will come through i] your ability to acquire and use the specialized knowledge of others— knowledge collected and condensed in Hawkins Electrical Guides. Just think how much these books will help ‘you. In Hawkins Electrical Guides you always have at hand for immediate refer- ence or study, a wonderful work contain- ing 4,700 illustrations and 3,500 pages which cover all ‘subjects, principles, “(0 theories, practices, problems, troubles, meg and ways of doing things electrically. } The Guides fit your pocket. You can carry a number about with you till you have mastered its contents. All subjects are indexed so that you can «.nd the information instantly. Writ- ten in the modern question and answer form. It’s like having a famous electrical authority ‘always at your elbow ready to answer any question ‘you ask. H AW IN 3500 Pages—4700 Pictures ELECTRIC AL | Flexible Covers — Pocket’ Size Do you want to know the facts about the following electrical subjects? $ 1 A Number $1 A Month They are all oovend 5 in Hawkins Electrical Guides. Shipped to You FREE Electrical signs and symbols—static and current electricity—primary . celis—conductors and insul and ism—induction coils—dynamo of, dynamos—arma- rushes. otor . principles—a reaction—motor starting—calculations—brake horsepower—selection and beste up some information that will increase your earning ability. Decide for yourself that they are installation of dynamos and. motor rs—galvan ers— 1 cells current tth meters tion of dynamos—operation of motors. Dis- wires and wire u inside, outside and under-" trih ground wiring—sign prot tifiers—storage | the most complete and clearly . battery Alternating current pr current written electrical books ever fe) diagrams—the power factor—alternator principles—alternator Every book is THEO. tion—windings. A.C. Motors—synchronous and induction motor prin- complete in itself but the. AUDEL ciples—A. C. commutator motors—induction motors, transformers: losses, | entire set is the best & CO. construction, connections, tests—converters—rectifiers. Alternating cur-| bargain. Accept this 72 Fifth Ave. rent systems—switching devices—circuit breakers—relays—lightning } ynusual offer now— NewYork,N.Y. protector apparatus—regulating devices—synchronous condensers— | mail the coupon ew Yor! indicating devices—mete er factor ind wave form today. If you de- * Please submit me ment—switch boards. Alternating current, wiring power a ele cide to keep the, for examination met testing, phy and tele- ks you can Hawkins Electrical make settle- . phony—wireless—electric bells—electric lighting—photometry. ° Electric Guides (price $1 each). ment at ays—e ti lighting—trollzy car operation—mis- | only $1 Ship at once, prepaid, — bile self-starters and fighting “systems, electric vehicles. . Elevatora— until factory I agree to send you cranes—pumps—air compressors—electric heating electric: welding— $1 within seven days and to further mail you $1 each month ‘until paid. USE PENCIL. soldering and ly therapeutics—X- te “j26-pace ready reference index of ‘che complete library. Ths fey S been planned to render easily accessible all the vast infor- mation contained in the 10 Electrical guides. There are over 13,500 cross - feterences. You find what you want to know instantly. tung: elect MASTER TEACHERS recognized Conservatory of Music the ON IVERSITY EXTENSION METHOD, The ideal,of a genuine Conservatory of Musie for home study based upon lessons containing the cream of the life's teaching experience of Master Musicians, reinforced by the, Sndividual instruction of specialists, is now attained. The instruction of a master—the individual touch of an accomplished teacher—is yours to _ command from very moment you enroll, The University Extension Conservatory, by adopting Instruction Method, has placed home music LJ beyond question as to results. Anyone can learn at home, Write telling us _Any Instrument in Piano Voice, Scho! Cornet Mandolin rgan—and w ree with etails of course you want. Send now. ITY EXTENSION CONSERVATOR CONSERVATORY and letme see ‘you can do with it. Many newspaper artists earning $30.00 to $125.00 or more per week were trained by my course of per- sonal individual lessons. by. mail. PICTURE CHARTS make original drawing easy to learn. Send sketch of Uncle Sam with 6c in stamps for, sample Picture Chart, list of successful students, ’ amples of their work’ and evidence of what You: can accomplish.” Please state your age. “Che Landon School of CARTOONING ‘and ILLUSTRATING 1251 Schofie'd Pldg.’ Cleveland, Ohio Practical because this course has compiled by Meyer Both Company, the largest, most widely known organization of its kind—a long established company of international reputation—practi- cal because it embraces the rich fund of experi- encethathasmadethem dominantlysuccessful. The demand for good commercial art exceeds the supply. It’s opportunity for you-in a _ highly paid, intensely interesting profession. ° We can accept but a limited’ number of students, Send 4c instamps for special book today. -Adaress Home Study Dept. MEYER BOTH COLLEGE OF COMMERCIAL ART. 1945 S. Avenue, Free Book- Send for this Free 118 Page Book. It tells how you can gain a thor- ough knowledge of law in your spare time. as 40,000 others are ane. Portunities in the profession of law. Busi- ness today needs law trained men. Free book gives-experiences of suc-essful law trained mien, and tells how you can read’ law under guidance of Ex- President Taft and 80 other eminent authorities. . Blackstone Institute 128. 608 S. Dearborn Street, Chicago Gov t Jobs Short hours. Easy work. No strikes. No hard times. Steady, lifetime positions, ede to $150 sae start. uick proretion. MEN WANTED! ::: ther wonderful advantages ppt Post Office, Custom House, Jemigration Jarrier, Panama Canal and other ral Reven "Bre are under. former Civil, Service Secretary. You can y. Write for FI BOOK an Special 20 Day Offer NOW. Patterson Civil Service School. 1611 News Bidg., Rochester. N N-Ve Splendid op- If you are an pond Citizen 18 or over write Mai 9W. Tamblyn, 437 Ridge Bidg., Kansas City, U. S. A . Earn$100 to $400 a Month over. leads Lawyers car on = | A Complete Conservotory Course nousands OF successful students enro Cha We Teach Practical Ve leaen Practica Commereial Of A | can make @ mman of you ome gantly written on a card if you enclose stamp te
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$06 are at; log h YOu “$1,000 Saved!” “Last night I came home with great news! Our savings account had passed the $1,000 mark! “I remember reading one time that your first thousand saved is the most important money you will ever have, for in saving it you have laid a true foundation for success in life. And I remem- ber how remote and impossible it seemed then to save such a sum of money. “T was making $15 a week and every penny of it was needed just to keep us going. -It went on that way for several years—two or three small increases, but not enough to keep up with the rising cost of living. Then one day I woke up! I found I was not getting ahead simply because | had never learned to do anything in particular. As a result whenever an important promotion was to be made, I was passed by. “I made.up my mind nght then to invest an hour after supper each might in my own future, so I wrote to Scranton and arranged for a course that would give me special training for our business. I can’t understand why I never tealized before that this was the thing to do. Why, in a few months I had a whole new vision of my work! The general manager was about the first to note the change. An opening came and he gave me my first real chance— with an increase. A Jittle later another promotion came with enough money so that we could save $25 a month. Then another increase—I could put aside $50 each pay day. And so it went. “Today I am manager of my department—with two increases this year. We have a thousand dollars saved! And this 1s only the beginning. We are planning now for a home of our own. There will be new comforts for Rose, ttle enyoyments we have had to [INTERNATIONAL CORRESPONDENCE SCHOOLS deny ourselves up to now. And there is a real future ahead with more money than I used to dare dream hat I could make. What wonderful hours they are—those hours after supper !” For 28 years the International Correspondence Schools have been helping men and women everywhere to win promotion, to earn more money, to have happy, prosperous homes, to know the joy of getting ahead in business and in life. More than two million have taken the up road with IJ. C. S, help. BOX 7666, SCRANTON, PA. Exp tion, or in the subject, before which 1 mark X. ELEOTRIOaL ENGINEFR SALESMANSHIP Electric Lighting and Railways ADVERTISING Electric Wiring Window Trimmer Telegraph Engineer Show Card Writer Telephone Work Sign Painter MEOHANIWaL ENGINEER Railroad Trainman Mechanical Draftsman ILLUSTRATING Machine Shop Practice Cartooning Toolmaker BOOK KEEPER OIVIL ENGINEER GOOD ENGLISH starting every day. Isn’t it about time for you to find out what the I.C. S. A CHITECT pescher can do for you? Architectural Drafwanet CIVIL SERVICE y Concrete Builder or Railway Mail Cle You, too, can have the position you want in the work of your choice, PLUMNING AND HEATING you can have the kind of a salary that will make possible: money in the bank, a home of your own, the comforts and lpxunes you would Anto Repairing Textile Overseer or Su AGRICULTURE CHEMIST Gas Engine Operating Stenographer and Typist Cert. Public Accountant Surveying and Mapping TRAFFIC MANAGER MINE FOREMAN OR ENGIRESR Railway Accountant AUTOMORILE OPERATING Sheet Meta) Worker Navigation Spanish French lain, without obliga.ing me, how | can qualify for the posi-+ ARCHITECT Common Schoo! Subiects i | | [ | Over 100,000 are now turning their spare time to profit. Hundreds are ia ia Come est | | | | | ' Poultry Raising Italian | } hike your family to have. No matter what your age, your occupation or Name your means—you can do it! | All we ask 1s the chance to prove 1t—without obligation on your part or =: apenny of cost. That’s fair, isn’t it? Then mark and mail this coupon. ate. il e Canadtans may send this coupon to International Correspond, Schools, Muntreal, Canada ‘ i | | | i i iI | | | | je | je is a. | 1 | | 3 é | 7 7 > | \mericam er write tells ya Mail nd Rural | he mer Civil, | | | | 1 EE BOOK me during to ins speci- nmanship | ill be ele- stam) "it Today. U. S. Ae
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4 Kansas travels —and talks with New Hampshire ‘THEY were right,” said Kan- sas, “when they remarked to me, ‘Be sure to have a look at New Hampshire’s scenic beauty.’ Out Kansas way, you know, we're long on fields but short on forests.” _ New Hampshire proffered wel- come Owl Cigars and made reply “Welcome Western visitor, it’s fine to know you now so intimate- ly. I’ve long sold cotton goods to you and long enjoyed the grains you so ably raise. And much oil from your famous fields is used in these Eastern parts. We'll smoke again for good acquaintance and good pleasure’s sake.” * * * You’. FIND dependable citizens of every state enjoying depend- able Owl and White Owl Cigars. Experience tells them that they can always count on the unchang- ing fragrance of Owls. Why don’t ‘you try Owl or White Owl and see how much dependable fra- grance a nearly $3,000,000 leaf reserve can give cigars? DEALERS: If your distributor does not sell these dependable cigars, write us. Corn, 119 West 40th Street, New York City TWO DEPENDABLE CIGARS OWL : WHITE OWL jj 4 | aM st 3 for 20 igh or 20c, straight /
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PHONOGRAPHS Lovers Choose the BRUNSWICK USIC lovers choose the Brunswick Phonograph to play their favorite records, for it plays all records at their best. The Brunswick Method of Reproduc- tion makes this possible. It consists of two outstanding, exclusive features — the Brunswick Ultona and the Brunswick Tone Amplifier. The Ultona The Ultona is a scientific creation which enables one to play all records with faith- ful regard for the requirements of each make. It is not in any sense a combina- tion contrivance, but involves a _ funda- mental principle of sound reproduction. Nor is the Ultona a complex mechanism. By a slight turn of the hand it is adapted to any make record, instantly supplying the correct position on the record, the proper needle and diaphragm and the precise pressure or weight necessary to play that particular record. The Tone Amplifier The Brunswick Tone Amplifier is another improvement of fundamental importance. As the name implies, it amplifies the tone, making it richer, sweeter, truer. This vibrant tone chamber, constructed entirely of moulded hollywood, free from metal, provides the requisite resiliency that unfolds and projects true tone. Like a fine violin or the sounding board of a piano, it complies with the approved laws of acoustics. Hear The Brunswick Before You Buy One hearing of this remarkable instrument is enough to convince the most critical music lover that here is the final type phonograph. THE BRUNSWICK-BALKE-COLLENDER COMPANY General Offices: 623-633 So. Wabash Ave., CHICAGO Branch 1 Cities of United States, Mexico and Canada Canadian Distributors: Pa Merchandise Sales Co., 819 Yonge St., Toronto Ask your dealer for a free copy of “‘What to Look For in Buying a Phonograph.”’ You will want this interesting | instructive booklet before you buy because it is authentic. It was written by Henry Purmort Eames, L. L. B., Concer Pianist and Lecturer, Director Pianoforte Dept., Cosmopolitan School of Music, Chicago. > q | J TE j { | fi: pk oh . x WL ght > | | ; bd
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To us—an acceptance of responsibility. ff identifies the products of the Victor Talking Machine Com pany, Yes, but it goes further than that, for it is the achievement, Products bearing this mark have their origit and are ~ manufactured complete in the greatest and most efficient plant of its Kind im the world. They are created by the greatest array of musical talent ever drawn together by any one for any purpose. — They represent the greatest investment of time, money and scien- ; tific research that has ever been made with absclute Singleness of _ purpose im this particular line of human endeavor. In these pro- ee ducts ate embodied practically all of the basic improvements which _ have given the talking machine its patent of ‘nobility among musical instruments and have established the Victor’as a standard of com- parison for all other such instruments. oe eee Victors and Victrolas $12 to $950. Victor dealefs everywhere. = Vi ctor Talking Machine Ca x =i ; RS 2 | 4
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