3 



A TEXT-BOOK 



of (Jd5? 



PHYS/IOLOGY 



For 



STUDENTS AND rflACTITIONERS OF MEDICINE 



By 



russeLl burton-opitz 



S|M., M. D., Ph.D. 



Associate Professor of Physiology, Columbia University; Professorial 



Lecturer in Ppiology in Teachers College and the 



Extension )epartment of Columbia University 



ILLUSTRATED 



PHILADELPHIA AND LONDON 



W. B. §|VUNDERS COMPANY 



1920 



