Loudspeakers Page Hospital Doctors (Jul, 1933)
It’s hard to imagine a hospital without a P.A. system.
Loudspeakers Page Hospital Doctors
No time is lost in calling any particular physician in one of New York’s big hospitals, where a new paging system has just been installed. When a telephone call for a doctor is received at the central switchboard, it is referred to an operator who, finding the doctor is in the hospital, repeats his name before a microphone. Eighty-five loudspeakers in the corridors and ante-rooms of the hospital broadcast the message. Wherever he is, the doctor takes the call at the nearest telephone. Western Electric engineers, who installed the system, provided controls for adjusting the volume of the loudspeakers.
One Big Blow (Mar, 1948)
Resisting the urge to comment.
One Big Blow inflates this non-sinkable swimming suit enough to keep the girl afloat for many hours. When uninflated, the suit looks like any other, the tube being concealed when not in use.
Fun with Black Light for Home Chemists (Jul, 1939)
This looks pretty fun though I’m not sure where you can buy uranium nitrate these days.
Fun with Black Light for Home Chemists
By RAYMOND B. WAILES
CHEMICALS that glow with magic colors in the dark, under invisible illumination with “black light,” have been applied to theatrical costumes and decorations with spectacular effect. Your own home laboratory can be the stage for equally striking experiments with these substances, which possess the curious property known as fluorescence. Also, you can prepare other substances that shine in the dark through the phenomenon called phosphorescenceâ€”which is distinguished from fluorescence by the fact that phosphorescent chemicals continue to glow for some time after removal from the light that excites them.
A quick picture of the American way (Sep, 1958)
Boy, time has a funny way of changing how we perceive things. Nowadays this could be an ad for Greenpeace or the Sierra Club. You look at it and just cringe. Well, I do. I’m sure many members of the current administration would look at this ad with a teary eye for the lost days when the U.S. was the utterly dominant industrial power in the world and the rest of the countries on earth either provided customers or raw materials.
A quick picture of the American wayâ€”
with only 5.5% of the world’s land area the U. S. is served by 46.3% of the world’s trucks
ATA Foundation Inc.
American Trucking Industry
WOULD ADD TO ALPHABET (Jul, 1936)
And you thought switching to the metric system was hard…
WOULD ADD TO ALPHABET
An alphabet of forty-one letters would be an improvement over our present one of twenty-six, according to a Portland, Ore., educator. In the English language the letter “a” alone is pronounced eight different ways. He would add a new letter for each sound. With such an alphabet, he declares, a person unacquainted with the language would require only two weeks’ time to learn it.
Rear View TV for Cars (Sep, 1956)
This is one they got right.
REAR VIEW TV for dash of tomorrow’s auto will tell driver what’s going on behind. Universal Broadcast System made device.