Author of "Studies in Human and Comparative Pathology," "Instinct and Health," etc., etc. Clinical Professor of Medicine, New York Polyclinic, late Lecturer in Comparative Pathology, London Medical Graduates College and University of Buffalo

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HOUGHTON MIFFLIN COMPANY
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COPYRIGHT, 1907, 1908 AND 1909, BY THE CURTIS PUBLISHING COMPANY
COPYRIGHT, 1909, BY WOODS HUTCHINSON
ALL RIGHTS RESERVED
Published November 1909
FIFTH IMPRESSION