Ultra-Violet and daylight rays in relati
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J. R. Ashworth
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Article
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1943
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John Wiley and Sons
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English
β 369 KB
## Abstract Accounts are given of apparatus used in the measurement of light radiation together with the results of eleven years ' observations of the intensity of ultraβviolet and daylight rays and their ratio. It is shwon that the variation of the ratio of ultraβviolet to daylight rays are also g