Y // 



S 



THIRD EDITION 



SEX AND ^ 



INTERNAL 

 SECRETIONS 



Edited by William C. Young, Ph.D. 



Professor of Anatomy, University of Kansas, Lawrence 



Foreword by George W. Corner, M.D., D.Sc. 



Director Emeritus, Department of Embryology. 

 Carnegie Institution of ^ ashington 



The \YiIIiains & Wilklns Co. 



