MM’S Cover from Painting to Magazine
Three photo negatives are made of 21″x30″ oil painting (below). At same time screen of 133 dots to inch is placed between plate and lens. On one negative all but blue color is filtered out, second all but red, and third yellow. Proof of type for the cover is photographed. Type on negative is masked for drawing.
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Can Fish Hear?
…STRANGE TESTS GAUGE SENSES OF DUMB CREATURES
“DUMB” animals are learning to talk. Not by ord of mouth, but in roundabout ways they are telling scientists how they feel, what they see and hear, and even what they think about. Age-old mysteries—always the source of controversy—are evaporating as research workers peer into the minds of inarticulate creatures.
Only recently have experimenters succeeded in hurdling what has long been an insurmountable obstacle— the fact that animals, unlike human laboratory subjects, cannot give verbal reports of their experiences and emotions. Through ingenious artifices that establish, in effect, a common language between the animals and their investigators, their innermost sensations are now being revealed.
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This seems like a really, really bad idea, though in a pinch you can use your mushroom as a writing implement.
ABANDONED LEAD MINE TURNED INTO MUSHROOM FARM
On a piece of ground 200 feet beneath the earth’s surface, Dick Wills of Miami, Okla., is growing regular crops of mushrooms. His unusual farm is the passageway of an abandoned lead and zinc mine, where he found a suitable temperature practically constant the year around. The farm hands wear regulation miners’ costumes, even to the small carbide lamps on their heads, for the mushrooms thrive best in darkness. Fifty pounds are harvested daily. A royalty is paid to the owner of the land, an Indian, who is delighted at the resumption of his income since the mine itself petered out.
This tube is about the same size as an entire modern hearing aid.
Tiny Tube for Hearing Aids
Only 3/4-inch long and 3/8-inch wide, tubes like this powered such war devices as walkie-talkies and mine detectors. Now their maker, Sonotone, is using them in hearing devices. Three of them go into Sonotone’s latest instrument, which can be used for either low- or high-powered amplification.
CHEMISTRY: An Exciting and Profitable Hobby
How to Set Up Your Laboratory
By RAYMOND B. WAILES
WITH simple equipment requiring surprisingly little financial outlay, you can build in your home a small chemical laboratory that will provide a fascinating hobby. Here you may amaze your friends with seemingly magical chemical tricks, as by the manufacture of paint that shines in the dark or of writing inks that disappear unless the secret of bringing them back is known. You can manufacture useful things for the home, as soap or liquid court plaster. You can test gold rings and ivory piano keys to see whether they are genuine. If you wish, you can investigate the chemical processes used in industry, with the ever-present possibility of an important discovery. To the real dyed-in-the-wool experimenter, chemicals in themselves are intriguing, and a beautifully colored precipitate or a startling formation of crystals is its own reward for the trouble of preparation.
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Motorcycle Cops Show How to Ride ‘Em
By Tom Cameron
IF YOU’RE learning to ride a motorcycle, the policemen who patrol your streets and highways could give you some valuable pointers. Chances are these men are just about the best rider? in the community. Because of the nature of their work they have to be. And it’s likely this ability was not won through trial and error, for many police departments give their men a course in riding before sending them out.
One that has won acclaim for the thoroughness and success of its motorcycle training program is the Los Angeles Police Department. Out of many years of experience, embracing use of machines from the old one-lungers to the four-cylinder speedsters of today, the instructors there have evolved detailed “do” and “don’t” procedures. The “don’ts” come first:
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