Abstract
IN the note referring to the proposed electric lighting in the House of Commons by metal filament lamps, in NATURE of June 6 (p. 352), it is stated that “The present proposal is to use metallic filament lamps enclosed in holophane globes behind ambercoloured glass to cut off completely all ultra-violet rays.” Investigations made in America and in Germany show that the ultra-violet rays from such lamps are insignificant, and are far less than in daylight giving the same illumination, and probably less than with some kinds of incandescent gas mantles.
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TROTTER, A. Alleged Ultra-violet Rays from Filament Lamps. Nature 89, 377 (1912). https://doi.org/10.1038/089377a0
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DOI: https://doi.org/10.1038/089377a0
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