This is the earliest issue we have of this publication.
This is the earliest issue we have of this publication.
LONG distance telephone calls sometimes end in arguments over the time for which the subscriber should be charged. To eliminate such discussions the French Postal Service has installed meters in public phone booths to give the subscriber fair warning when his period is about to end, and to time the conversation mechanically.
Sand Castles Made in Fancy Molds KIDDIES on the seashore may make ornate and highly decorated sand castles by the use of a newly devised mold made from stamped tin, and constructed in four hinged sections. It is locked together, and one corner held tightly while damp sand is packed in firmly from the top. […]
A HALF a century ago a young inventor noticed that the film on a can of paint was tough. He exposed linseed oil to the air, oxidizing it, then mixed in cork and gum, and produced a substance that could be rolled out, like a pie-crust, into a carpet. Today linoleum, which he thus originated, is manufactured by the machinery pictured on this page.
Nest-building material, such as bits of wool, cotton yarn, and feathers, offered to the birds in a screened box, will induce them to nest near by. Hard water is unsuited for household purposes and must be softened before it can be used. The filter shown above is connected with the supply pipes. Fruits or vegetables placed in the conical colander are pressed to pulp by a wooden plunger and forced through the holes of the sieve.
Radio Outfit Now Becomes Hospital "Nurse" By Armstrong Perry DO you know what "ether" means to thousands of weary hospital patients these days? It no longer suggests shock and the painful after effects of an operation. Rather, the word brings thoughts of pleasure, recreation, and amusement. For the radiophone has at last entered the hospital— where, above all places, it belongs—and musical entertainments, broadcasted daily through the ether from dozens of transmitting stations, are now being borne into hospital wards and orphan asylums, bringing comfort and delight to the lonely inmates.
A THOUSAND tons of steel rails were piled upon a concrete pier in Chicago recently, to determine whether piers extending only to a layer of hardpan, and designed for a four-story building, would support the weight of a 16-story structure on the site of the Chicago Union Station. The soil at this point is composed of 65 feet of soft earth over an eight-foot layer of hardpan. Beneath the hardpan a second layer of soft clay and sand is encountered before rock is reached. The tests were conducted to avoid, if possible, the expense of excavating to bedrock, and to find how many additional piers would be required to support the 12 additional stories.
IN the back of a retail electrical store located in the skyscraper section of New York City, there is a unique club-room for radio amateurs. A full set of radio receiving equipment has been installed with an aerial on the roof. Apparatus can be tested out in actual practice, and the visiting amateur is given the privilege of taking any piece of apparatus from stock to connect up and use as he sees fit.
SOME blizzardy morning, if you live in a big city, you may look out of your window to see a monster motor-driven snow shovel creeping down the street, pushing its nose into high drifts, shoveling up snow at one end, and turning it out in the form of tightly packed snowballs at the other!
MOST double-headed calves are stuffed; but on the farm of Edd Ellis, at Arkansas City, Kans., is one so much alive that it eats with both its mouths! In fact, the animal seems to find that two, heads are fully as useful as one. The body of the calf is normal, but there are two complete heads, with two noses, two mouths, and four eyes.
WHENEVER it is desirable to erect a temporary watertight structure quickly and cheaply, the portable canvas dam invented by Johan Store, a Norwegian engineer, will meet the need. The dam consists of a large canvas tube seven feet in diameter which is anchored in place across the bed of a stream and then pumped full of water. The weight of the gigantic hose makes it conform to irregularities of the bottom. The canvas is protected from the cutting action of sharp stones by an enclosing network of tarred rope.
ENTERTAIN your friends with radio concerts, enjoy the fascination of radio as a hobby, make wireless a profitable part of your business, get news and market reports before they are published, take public speeches off the air. With a simple receiving set and a Radio MAGNAVOX you can do all this, and more, too, in your own home or office. The front cover of this magazine shows how easy it is, with a Radio MAGNAVOX. Practically every variety of vocal and instrumental music from jazz to grand opera, news reports in plain English, and many other special features are radio broadcasted daily, free to anyone with the simple equipment to receive and reproduce them. Read the article in this issue.
Motor Ambulance Carries First Aid to Injured Dogs DOGS injured by autos on the roads near London, England, now are cared for by a motor ambulance. A veterinary gives first aid on the spot, and if there is hope of saving the life of the pet, it is placed on a thick bed of straw […]
Walking-Stick Supplies a Light for the Smoker A CIGAR-LIGHTER in a walking-cane is a novelty that is being introduced in France. The lighter is operated by compressed air. A long steel rod attached to the handle and extending into the hollow of the cane carries a briquette of highly inflammable material, the chemical composition of […]
A COMBINATION phonograph, and motion-picture projector that plays appropriate music as the film is being shown has been invented by A. L. Edminson, of Los Angeles, Calif. After eight years of experiment he has combined the two machines into a cabinet slightly larger than that of the standard phonograph. The upper part contains the phonograph; the lower a motion-picture projector. The films are exhibited on a silk screen, measuring 18 by 22 inches, which is placed behind the doors of the sounding-box. It is claimed that the pictures are projected clearly enough to be seen by an audience 40 feet away.
WEIGHT for weight, the most powerful professional "strong man" is a weakling compared with many common insects. If our legs had the same relative power as those of a flea, for example, we could jump with ease over a church spire 300 feet high. An ant moving a heavy pebble up a little slope of earth is performing a feat equivalent to that of a man pulling a railroad train along the track single-handed. Ants have frequently drawn little wagons 1400 times as heavy as themselves.
BICYCLE toboggans are adding new thrills to winter sports in Europe, where a strap-iron frame resembling a bicycle in shape, but equipped with broad iron runners instead of wheels, has made its appearance on the hills.
“BOWLEGS and KNOCK-KNEES” UNSIGHTLY SEND FOR BOOKLET SHOWING PHOTOS OF MEN WITH AND WITHOUT The Perfect Leg Forms PERFECT SALES CO. ,140 N.Mayfield Ave.. Dept. 45, Chicago, Ill
All-Weather Bus Comfortable the Year Round SEATING twenty-five passengers, an all-steel bus has been designed for comfort in all weathers. In winter the body is completely enclosed and warmed by the exhaust pipe. In summer, the windows swing out of the way. The sides are open, and the view unobstructed; not even the frames in […]
By R. A. Squires (Second Prize in "New Uses for Electricity" Contest) WHEN our baby arrived, he started life with a severe case of colic, which kept us up at all hours endeavoring to quiet him. We shortly discovered that gently shaking him up and down in his crib would induce him to be perfectly quietâ€” as long as we kept it up. This became mighty tiresome, even when my wife and I took turns, and after a few nights we were both worn out. So I proceeded to contrive a mechanical means to shake the baby by mounting a discarded fan motor on a base secured in the lower part of the crib. I ran a belt from the small pulley on the motor to a 6-in. pulley mounted on a short piece of shaft, which was provided with two bearings and a base for attaching.
Belgian General Learns to Bat GENERAL JACQUES, of the Belgian army, received a lesson in batting from an expert during his stay in America, when Babe Ruth showed the famous soldier how to “line ‘em out.” The Babe demonstrated where to meet the ball, how to stand at the plate, and how to swing. The […]
AFTER tramping through South American jungles where he often was forced to travel from tree to tree above deep swamps, and to rely for food upon his skill with a bow and arrow, W. Kotal arrived recently on the Isthmus of Panama, completing the first quarter of his proposed walking trip around the world.
SEWAGE that costs large cities tremendous sums each year can be turned into a source of power equivalent to thousands of tons of coal! The waste now dumped into rivers or shipped to sea may be used to run factories or to light buildings! That conversion of sewage into power is possible has been proved conclusively by the city of Birmingham, England. There a suction gas engine of 20 brake horsepower has been successfully driven by the gases given off by sewage sludge.
News Photographers’ Auto Is an Oversized Camera PROGRESSIVE newspaper photographers of Atlantic City, New Jersey, have installed an auto body modeled after a camera, from which they take pictures of the news events in that vicinity. In addition to its advertising value, the odd body provides space for a darkroom in which plates may be […]
New Tanning Discoveries Will Bring You Cheaper Footwear By John Walker Harrington WELL-SHOD feet are among the essentials of health and long life," declared Dr. John B. Huber in a recent article in POPULAR SCIENCE Monthly. The magnitude of our national shoe bill is revealed in this story of new discoveries in tanning, which hold forth hope of a coming fall in every family's expenses for footwear.
DISCOVERY of "odic rays" of high penetration produced simply by the electric current drawn from an ordinary light socket, and yet with the curative and medicinal value of X-rays, is claimed by Dr. Edgar L. Hollingshead, of Pasadena, Calif. With simple, inexpensive apparatus he is reported to have passed rays through 11-1/2 inches of lead and 4-1/2 inches of steel, at such strength as to sear dental X-ray films encased in tinfoil.
At Last Outdoor Sleepers Can Keep Heads Warm OUTDOOR sleeping is likely to be more popular with the use of a newly designed electrically heated pad to keep the scalp warm; forâ€”particularly in the damp air and changing temperatures of springâ€”it is sometimes difficult to sleep comfortably without putting the head under the bedclothes. This, […]
WHETHER an egg is a potential rooster or an embryonic hen can be determined, it is claimed, by a "sexometer" which may prove to be of value in the poultry industry, for when the sex of eggs can be told, it will be possible to send most of the rooster eggs to market and retain the hen eggs for the upbuilding of the home flock.
Full of perfume… sure it is. The Mirror Is Full of Cheer â€” Just Unscrew the Handle NO one can fail to be cheerful after a glance in this mirror. Forâ€”you will promise to keep the secretâ€”its handle will unscrew, and between the glass and the silver case there is a hollow space big enough […]
COMBINING lightness, speed and economy, the small car is becoming extremely popular. How it is establishing itself in England by remarkable speed records was graphically described in the February issue of POPULAR SCIENCE MONTHLY. On this page are the latest cycle models exhibited at the recent Paris auto show.
Do you know just what happens when you "charge" a purchase in a large department store? You see the sales clerk write your name and address, with the amount of the purchase, on a charge slip, then pack the slip into a cylindrical box and start it on its way through a pneumatic tube to some unknown destination. A minute later the slip returns by the same route, approved or otherwise, to the sales clerk.