Excerpt from U. S. Patent Applications Vested in Alien Property Custodian, Vol. 9 This invention relates to biologically active sub stances and to a method for the preparation of same and more particularly to such substances as have the action of a male sex hormone. It has particular reference to a process of preparing acylated derivatives of testosterone. The present application constitutes a continua tion in part of my copending application entitled: Production of male sex hormone, Serial No filed January 25, 1937. The primary object of my invention is to oh tain acylated testosterone in the pure crystalline state. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.