Telephone Holder Is Curved To Fit Contour of Shoulder
Leaving both hands free, a telephone holder designed to fit the contour of the shoulder balances the instrument perfectly in talking position. The three-point suspension holds the handset so securely that typing is possible during a conversation. The holder snaps on in five seconds and does not have to be removed to place the instrument in its cradle.
PS Builds a LASER …and so can you
The incredible ruby ray is the hottest scientific discovery of the decade, but practical uses are still scarce. Here’s your chance to join the search
-June, 1960: Dr. T.H. Maiman, of the Hughes Aircraft Co., reports the development of the first successful ruby laser.
â€”November, 1964: Popular Science publishes plans for the first do-it-yourself ruby laser.
By Ronald M. Benrey
IT MAY sound like science fictionâ€” but it’s really science fact: You can build a working ruby laser. It could be the most challengingâ€”and rewardingâ€” home-workshop project that you have ever tackled.
A ruby laser is a source of coherent light. All of the light waves in the pencil-thin, bright-red ruby laser beam are in phaseâ€”or in stepâ€”with each other. This extraordinary property of the laser beamâ€”shared by no other light sourceâ€”has spurred a world-wide search for practical uses.
Ordinary light sourcesâ€”a light bulb, for exampleâ€”generate incoherent light; the light waves are out of phase with each other.
Drop a pebble into a still pond, and the waves ripple out smoothly in all directions. This represents a single light wave from a light source. All light sources produce more than a single wave, however.
They act as if you dropped a handful of pebbles at once: You get a jumbled clutter of waves one on top of another. This clutter of waves is analogous to incoherent light.
Suppose, though, you dropped your handful of pebbles one pebble at a time, each in exactly the same spot in the pond. The waves would continuously radiate from that point. All of the wave crests would be in phase. This is coherent radiation.
A ruby laser generates a coherent light beam by a similar process. Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. Inside the ruby laser rodâ€”heart of the ruby laserâ€”excited atoms are stimulated to emit light waves in phase with each other.
Robot Messenger Displays Person-to-Person Notes In Public
TO AID persons who wish to make or cancel appointments or inform friends of their whereabouts, a robot message carrier has been introduced in London, England.
Known as the “notificator,” the new machine is installed in streets, stores, railroad stations or other public places where individuals may leave messages for friends.
The user walks up on a small platform in front of the machine, writes a brief message on a continuous strip of paper and drops a coin in the slot. The inscription moves up behind a glass panel where it remains in public view for at least two hours so that the person for whom it is intended may have sufficient time to observe the note at the appointed place. The machine is similar in appearance to a candy-vending device.
Stretch Paper to Align Typing
A NEW invention permits typewritten material to be lined up just as evenly on both sides as is the copy on this page. Typing is done on corrugated horizontal strips the width of a typewritten line, which in turn are cemented to a solid backing sheet. The copy is lined up after removal from the typewriter by lifting the right hand ends of each strip and stretching them to the required uniform width.
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H. G. Wells Photographs the FUTURE in His Motion Picture “THINGS to COME”
SUBTERRANEAN cities flourishing under the scientific miracle of weather manufactured by machinesâ€”
Light-ray traps which recapture the very incidents of long vanished centuries so that you may watch Columbus discover America if you wishâ€”
Flowers and vegetables grown without soil or sunlightâ€”
Personal radio telephones carried on the clothing in a space no larger than a coat buttonâ€”
An electric Space Gun powerful enough to rocket human beings around the Moonâ€”
Boring machines which carry joy-riding passengers to Aladdin’s caves ten miles beneath the earthâ€”
These are some of the amazing achievements predicted for the world of tomorrow by H. G. Wells, world-famous British novelist who is hailed as the greatest prophetic genius of our day. With other miracles of the year 2054, they will soon be seen in Mr. Wells’ startling motion picture, prophetically entitled “Things to Come.”
Toy Train Delivers Rural Mail
“NECESSITY is the mother of invention.” An Oregon rancher, living a mile from the highway, proved the truth of this old maxim when he put the world’s smallest mail train in operation over a spur line between his home and the road to save his wife the trip.
The train, powered with small dry-cell batteries, makes the trip to the road every morning, pulling a tiny mail box. Upon arrival, it is stopped by a lever laid along the track.
I Psychoanalyze Ghosts
By Nandor Fodor, LL.D.
author of The Search For The Beloved
“You may be a ghost yourself,” says this former Director of Research, International Institute for Psychical Research. Here’s his own story of weird probing into the unbelievable realm of some supernatural disturbances.
LESSONS were going smoothly at the I Wild Plum (N.D.) schoolhouse when suddenly the pail of coal near the stove began to stir restlessly all by itself!
Mrs. Pauline Rebel, the teacher, and her eight pupils were even more amazed when lumps of coal started popping out of the pail, striking the walls and bounding back into the room. Window shades started smouldering and a dictionary began to move by itself.
“Ghosts!” one of the children screamed and they all rushed madly for the door.
Later, after a careful investigation, the state fire marshal admitted he could not solve the mystery. He analyzed the coal, examined the pail and studied the dictionary. Nothing was wrong with them. People at Wild Plum still wonder and whisper about the schoolhouse ghosts.
Finger Wrench Reaches Tight Spots
Cut a hexagonal hole in a rubber finger tip and you have a wrench that’s fine for starting nuts in close spots on electronic chassis, in clocks, appliances, and instruments. The rubber finger tips are ordinarily used for handling paper.
Eye-Glasses Double for Microscope
EYE-GLASSES which can be used instead of a microscope have been invented by C. Dreisseg of Hamburg, Germany. The glasses obtain their microscopic power from specially treated dark paper.
This paper changed the focus of the eye so as to magnify the size of a fixed object. Even minute particles can be distinguished. The dark paper is encased in a leather band which fits snugly around the eyes to exclude all possible light rays. The novel glasses are ideal for student use.