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August 2, 1941

The Chemical Action of Ultraviolet Rays

JAMA. 1941;117(5):405. doi:10.1001/jama.1941.02820310077036

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The revision follows the same general plan of the original work published in 1925 but, as compared to the 362 pages in the first edition, comprises more than 950 pages. The text is not only a review of the mass of literature but also an effective analysis of the significance of the many contributions and is, as well, a complete manual for the investigator. The work would profit by the inclusion of more illustrative material in proportion to the profundity of the text. There is a disproportionate distribution of illustrations, e. g. there are four plates in the twenty page chapter on the commercial production of vitamin D but only ten in the preceding hundred pages dealing with the physiologic and therapeutic effects of ultraviolet rays. There is a somewhat better balance in the sections dealing with other industrial and commercial phases of the subject, which is a rich source

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