Word: ultraviolet
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With microscopes using visible or ultraviolet light, magnifications of a sort up to 5,000 diameters have been obtained, but the really useful upper limit has hovered around 2,000 diameters. With microscopes using electron beams, useful magnifications have jumped to 100,000 diameters and more. Light is a train of waves; to pick some tiny body out of the unseen, the waves must find it big enough to get hold of. If the body is much smaller than the wave length, it will slip through like a mosquito through a fishing net. Electron beams are also wave trains...
...trees, divides the four lanes into two. No signboards mar the way or confuse the eye-its only borders are the misty, pine-edged hillsides of the Alleghenies. Ten smart Esso stations, finished Pennsylvania-Dutch fashion in native wood and stone, specialize in restroom toilet seats sterilized by ultraviolet ray after every...
...plants and animals. Such cells must have access to water, as a medium of nourishment and energy exchange, and to oxygen or carbon dioxide for metabolism. An atmosphere would also be desirable, 1) as a storehouse of oxygen and carbon dioxide; 2) as a shield against the ultraviolet radiation of the parent sun; 3) as a muffler against sharp day & night temperature changes. Any conceivable kind of living cell would be killed or paralyzed by extreme cold...
...rooms, breweries and bakeries, hospitals, food factories. They mix their paint with chlorine and iodine. After nine weeks on the wall it still kills typhoid and some other germs in the air, retains some antiseptic strength for six years. It is not so effective as sterilizing indoor air by ultraviolet radiation, but it is cheaper...
...Sufferers from athlete's foot often have to throw out all their shoes, because they are breeding spots for the offending fungus. Last week Bernard Soep, a Boston industrial designer, demonstrated a new shoe sterilizer-an inexpensive ultraviolet bulb that can be plugged into an ordinary light socket, inserted into a shoe...