Hormone Secretion by Experimental Cryptorchid Testes *

This investigation has been aided by a grant from the Dr. Wallace C. and Clara A. Abbott Memorial Fund of The University of Chicago. Grateful acknowledgment is made to the following individuals for providing the gonadotrophic substances employed in the investigation. To Mr. Donald C. Wonder for Gonadin; to Dr. Oliver Kamm for Antuitrin-S; to Dr. J. A. Morrell for Prospermine; and to Dr. G. H. Hart for untreated pregnant mare serum.