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Arch Dermatol. 2006;142:553.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

THE JOURNAL OF CUTANEOUS DISEASES
VOL. XXIV
MAY, 1906
NO. 5

by MAJOR CHAS. E. WOODRUFF, A. M., M. D.
Surgeon U. S. Army. Rebman Company, New York and London, 1905.

The author announces in his preface that the present volume is the result of his search into the data to prove or disprove the theory advanced by von Schmaedel, in a paper read before the Anthropological Society of Munich in 1895, that skin pigmentation of man was evolved for the purpose of excluding the dangerous actinic or short rays of light which destroy living protoplasm. Having massed together all the data tending to support this idea the author makes many practical deductions as to the harmfulness of over-lighted schoolrooms, workshops, the dangers incurred by blondes in migrating to the tropics, even the search for the light of Southern California or Florida is liable to . . . [Full Text of this Article]

PRACTICAL RULES FOR WHITE MEN IN THE TROPICS¹