Word: ultraviolet
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Dates: during 1940-1949
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When fluorescent lighting showed commercial possibilities several years ago, Hygrade researchers went quickly to work. Mercury vapor inside fluorescent lamps is ionized by an electric discharge between electrodes at each end, produces short ultraviolet rays which must then be converted by a fluorescent powder to visible light. In February Hygrade's chief research engineer, James L. Cox, got an award from N. A. M. for a new method of coating the lamps with a porous powder so that longer rays of the visible range are efficiently radiated. Costly to install, fluorescents waste only 75% of their energy in heat...
Colds. Medical science has no preventive nor cure for the common cold, says Dr. Aaron. Only thing to do when you catch cold: go home and wait for it to blow over. Special vaccines may help break up colds, will not forestall them. Nor will Vitamin A or ultraviolet treatments provide "cold-defense." Most nose drops must be used with great care, for they often injure delicate membranes, spread infection to the ears. Only safe remedy for stuffiness, says Dr. Aaron, is neo-synephrine snuffed up the nose, or ephedrine in salt solution, not oil. Oil drops may dribble into...