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Show NEW TYPE LAMPS FOB SAJFER ROADS Sodium vapor lamps, affording safer and better night illumination illumina-tion of streets and highways, is reported to be the latest achievement achieve-ment of electrical research, in an account of recently completed tests reaching the Automobile club of Southern California. The report states that this new lamp increases visual acuity, or the distinctness of vision, about 12 times. Since the new light is most sensitive to the yellow-yellow, yellow-yellow, and the human eye is green part of the spectrum, this feature is acclaimed as the latest and most highly improved safety development for night lighting. -The lamps have already been given a practical demonstration on a New York highway, it is said. |