Abstract
Two useful recent publications deal with the more effective use of natural daylight. "The Natural Lighting of Houses and Flats with Graded Daylight Factor Tables", by T. Smith and Miss E. D. Brown of the National Physical Laboratory (London: H.M. Stationery Office, 4d. net), gives guidance in the choice of window dimensions for houses and flats. The penetration of daylight through a window is discussed, and tables are given from which the penetration of daylight for different window dimensions may be assessed. These tables are for daylight factors of 2, 1 and 0·5 per cent respectively. "Natural Lighting", Lighting Reconstruction Pamphlet No. 4 issued by the Illuminating Engineering Society (1s.), deals with the subject in a descriptive manner, and shows particularly the benefit derived from high windows and the suitable planning of buildings. In the most favourable circumstances, a daylight factor of 5 per cent may be attained at the working table, and in no case should the daylight factor be less than 0·2 per cent.
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Improved Use of Daylight. Nature 154, 299 (1944). https://doi.org/10.1038/154299c0
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DOI: https://doi.org/10.1038/154299c0