AN AMERICAN TEXT-BOOK 



OF 



PHYSIOLOGY 



BY 



HENRY P. BOWDITCH, M. D., JOHN G. CURTIS, M. D., 

 HENRY H. DONALDSON, PH.D., W. H. HOWELL, PH.D., M.D., 



FREDERIC S. LEE, PH. D., WARREN P. LOMBARD, M.D., 



GRAHAM LUSK, PH.D., W. T. PORTER, M.D., EDWARD T. REICHERT, M.D., 



AND HENRY SEWALL. PH. D., M. D. 



EDITED BY, 



WILLIAM H. HOWELL; I iki p.; M, i>. I 



PKOFESSOK OF PHYSIOLOGY IN THE JOHNS HOPKINS UNIVERSITY, BALTIMORE, MD. 



FULLY ILLUSTRATED 



1? 



PHILADELPHIA: 



W. B. S A U N D E R S, 



925 WALNUT STREET. 

 1897. 





