Word: ultraviolet
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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...
...display explains the uses of X-ray and surface photography, and of ultraviolet and infra-red light, in the determination of the authorship of paintings, the study of painting styles, the detection of forgery, and the restoration of damaged pictures. The University now has X-ray films available for study of more than 3,200 paintings in the United States and Europe...
...prevention of rickets in children, Vitamin D regulates the amount of calcium and phosphorus which the body uses for building bones and teeth. Only vitamin which does not originate in plant tissue, vitamin D occurs most abundantly in oily fish livers, is generated in the body by ultraviolet rays of the sun. Normal U. S. adults get all the vitamin D they need when they bask on beaches, and, if they drink plenty of milk, need not worry about calcium regulation. But to make best use of the calcium in their diet, pregnant women and children need extra amounts, must...
...weeks under expensive cold-storage conditions. In the Mellon-Kroger process it is done in a few days at a temperature of 60°, a relative humidity of 90%. Molds and bacteria, which would spoil such warm, damp meat if left to themselves, are put out of action by ultraviolet light from a Westinghouse lamp...