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Most of our information on internal secretions has been derived from experimentation and observation on various species of animals. Any textbook on endocrinology that merits the name must therefore be concerned largely with the comparative physiology of endocrine principles, the subject purportedly covered in Dr. Fleischmann's small volume. The difference between this and other more general treatises on the subject is chiefly one of emphasis. The very size of the book indicates that it must be quite incomplete; this suspicion is, of course, confirmed by perusal. An adequate treatise on comparative physiology of internal secretions must of necessity be encyclopedic. The author succeeds only in making available a small amount of information on the subject and in emphasizing that endocrine factors may act differently in various species, a point perhaps not sufficiently appreciated by clinicians. Provided its deficiencies and limitations are understood, this book may be useful for reference.
Vergleichende Physiologie der inneren Sekretion. JAMA. 1938;110(8):600. doi:10.1001/jama.1938.02790080058030