Abstract
L. C. PORTER, of the General Electric Company's incandescent lamp department in Cleveland, said, at a meeting of the American Society of Agricultural Engineers held on December 7, that if only electric current becomes cheap enough and suitable equipment is developed, then ultra-violet and infra-red radiations can have many uses on the electrified farm of the future (Science Service, Washington, D.C.). Adaptations of the familiar dull-red glowing electric heaters can readily be made for use in poultry-houses, in barns to keep new-born animals warm, and for the quick drying of hay. The greater compactness and decreased fire risk will give them considerable advantage over present types of equipment. Ultra-violet rays are known to have certain well-marked physiological effects, as in activating sterols to produce vitamin D and in keeping in check the growth in length of plants. For producing well-proportioned plants in greenhouses, the use of a new kind of incandescent lamp is suggested which has a globe permeable to ultra-violet as well as to visible rays.
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Ultra-Violet and Infra-Red Radiations on the Farm. Nature 145, 257 (1940). https://doi.org/10.1038/145257b0
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DOI: https://doi.org/10.1038/145257b0