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Metropolitan Museum Cleveland Museum of Art. Internet Arcade Console Living Room. Open Library American Libraries. Search the Wayback Machine Search icon An illustration of a magnifying glass. Sign up for free Log in. There are no known copyright restrictions in the United States on the use of the text. It gave, at once, the reasons for the evolution of nigrescence and blondness, the rea- sons why Europeans have always failed to colonize in the tropics and why blonds disappear when they migrate from their northern home, and finally gave rise to practical hygienic rules for white men com- pelled to reside in the tropics.
The suggestions were of such inestimable value, providing his theory was correct, that a systematic search was instituted for data, and as these discoveries proved the correctness of the theory, a synopsis was presented to the Ma- nila Medical Society, March 7, , but the full paper grew to its present size, as it was necessary to prove the theory conclusively.
