The biology, physiology and sociology of reproduction, also sexual hygiene, with the special reference to the male / by Winfield S. Hall, Ph. D. (Leipzig), M.D., (Leipzig), professor of physiology, Northwestern University Medical School, Chicago, member of the American Physiological Society, chairman of the Section of Pathology and Physiology, American Medical Association 1904-05, fellow of the American Academy of Medicine, president 1905-6, member of American Association for the Advancement of Science, etc., etc