THE AMERICAN ANATOMICAL 



MEMOIRS 



NO. 17 



NUMBERS 1 TO 7, INCLUSIVE, APPEARED AS MEMOIRS OF 



THE WISTAR INSTITUTE or ANATOMY AND BIOLOGY 



EDITED BY 



CHARLES R. STOCKAKD 

 CORNELL, UNIVERSITY MEDICAL SCHOOL 



HERBERT M. EVANS 

 UNIVERSITY or CALIFORNIA, BERKELEY 



LIFE PROCESSES IN GRAY NORWAY RATS 

 DURING FOURTEEN YEARS IN CAPTIVITY 



HELEN DEAN KING 



The Witar Institute of Anatomy and Biology 



PUBLISHED BY 



THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 



PHILADELPHIA, PA., U.S.A. 

 1939 



