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Article
September 23, 1911

THE JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION

JAMA. 1911;LVII(13):1058-1060. doi:10.1001/jama.1911.04260090280013
Abstract

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SATURDAY, SEPTEMBER 23, 1911 

THE ACTION OF TROPICAL SUNLIGHT  Modern investigation of tropical diseases has been so successful that in our enthusiasm we are apt to consider these as the only influences deleterious to life in warmer climates. It must be remembered, however, that the physical peculiarities of the tropics also have their effect on the animal economy—an effect the exact importance of which it is difficult to estimate. These various physical factors of a tropical climate are being studied, and A ron1 in recent articles gives the results of his investigations on the effect of tropical sunlight on the living organism.It is obvious that sunlight in equatorial and subequatorial regions will be more potent than that of more temperate zones; for not

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