Bicycle Radio is Easy and Cheap to Build
By ARTHUR C. MILLER
FANS who would like to install a radio on their bicycles so they can enjoy their favorite programs while riding around town or on short trips will find the inexpensive set described on these pages just what they have been looking for. Fitting in a basket mounted on the handlebars, the battery-operated, four-tube receiver contains its own loudspeaker. It gives excellent results on local broadcast stations, and if iron-core coils instead of the air-space type specified are used this range will be increased.
Science in Pictures
Push-Button Telegraph center permits messages to be typed only once, on a “printer perforator,” at point of origin. When messages reach the center, a clerk pushes a button for the city of destination.
Fishy Idea dreamed up by amateur inventor Dr. Carl Omeron, right, looks like a spark of genius. This is it: Tie balloons to a live “Judas” fish (which you catch the hard way). Put Judas back in the water and he’ll lead the way to the whole school.
LISTENING IN ON HITLER
Bombardment Of America From The Air Is Going On All The Time! But It’s A Propaganda Raid, And Uncle Sam Is Now Beating It Off.
by Charles J. Vests
“U.S. DEFENDERS repel foreign air attack!”
You’d jump, wouldn’t you, if you found that headline in your morning paper. Yet it’s true, today and every day.
A constant bombardment rains down on our shores, a bombardment just as real and dangerous as though it were one of bombs dropped from planes. It is the airborne bombardment of radio propaganda, one of the deadliest weapons of modem war, accompanied by the sinister crackle of messages and instructions to saboteurs and spies.
TELEPHONE WIRES RUN THROUGH TREE
RATHER than cut down an oak tree which grew directly in the way of a telephone line which was being erected in Wexford County, Michigan, the company cut an opening directly through the tree large enough to permit the wires to pass through without marring the oak. The rectangular opening is large enough so that the branches and leaves do not interfere with the wires, and all that is necessary to keep the opening clear is to trim away the foliage once a year. This opening does away with the necessity of cutting down the tree entirely or of cutting off the top, as is frequently done.
Things have come a very, very long way since then. Check out the Atacama Large Millimeter Array (ALMA), currently being built in Chile. When it’s complete it will have 66 separate dishes, each over 12 meters in diameter and be powered by one of the worlds fastest supercomputers.
Signals from the Stars
EVER since it was first indicated that the static present in the output of radio receivers was due in part to physical disturbances on the sun a new field of research has attracted popular scientific interest. It is radio astronomy, whose equipment and observers listen not to man made responses, but instead to continuous “static” from the stars. That cosmic radio noise exists was realized as far back as 1931. Early records proved it to be most intense when receivers probed toward the Milky Way, or lengthwise through our enormous watch-shaped galaxy.
New Devices Supplant Organs
IN SOME of the churches of Europe new forms of musical apparatus are being installed. These instruments supplant to a large degree the organ, or in some instances supplement the church organs. The radio and phonograph records are now made available for church use through the development of special apparatus.
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The actress in question with Wellington Belford was the late Ruth Renick. The “poison tongue” gentry refers to gossip columnists.
Catching Crooks by Radio
No longer can a crook in a strange town go unrecognized. Finger print photos, broadcast by radio, identify him across the continent in half hour!
By GEORGE C. HENDERSON
THESE cryptic signs, sent together with a fingerprint photo by the telephotographic process through 2,500 miles of space over mountains and desert in a few minutes’ time, constituted a challenge from the New York police to the San Francisco police to answer one question—’”Who is the man? Who is the owner of the fingerprint?”
Mars Refuses to Answer Radio Messages
DESPITE numerous efforts to communicate with them, the inhabitants of the planet Mars have thus far been consistent in their refusal to have anything to do with the earth-folks at the other end of the telephone line. The latest evidence of the unsocial nature of the Martians came recently when Dr. H. Mansfield Robinson, shown in the picture at the left, attempted to send a message to a woman on Mars who, he reported, had been in communication with him. Although listeners all over the world were on the alert for her response, it failed to come through.
The instruments employed by Dr. Robinson were an ordinary wireless set and a device which he calls a psycho-telepathic motor-meter. Apparently the science of interplanetary communication is as yet a great deal short of perfection.
Scientist’s Theory Explodes Hopes of Talking to Mars
THE possibility of transmitting signals to Mars by short waves has long been a moot question among scientists. Some say no, and some say yes, but the latest contribution to the dispute has been made by Dr. Alexanderson, world famous electrical wizard.
Dr. Alexanderson’s stand on the question is negative, for the reason, he claims, that there exists another electrical ceiling beyond the moon which impedes the signals sent out from the earth. He also believes that the signals may get “snarled” in a mysterious electrical medium of some sort, which holds the waves imprisoned for a fraction of a second before releasing them for a return to earth.