A TEXT-BOOK 



OF 



PHYSIOLOGY. 



BY 



M. (FOSTER, M.A., M.D., LL.D., F.R.S., 



PROFESSOR OF PHYSIOLOGY IN THE UNIVERSITY OF CAMBRIDGE, AND FELLOW OF TRINITY 

 COLLEGE, CAMBRIDGE. 



SIXTH AMERICAN EDITION, 



THOROUGHLY REVISED, WITH NOTES, ADDITIONS, AND TWO HUNDRED 

 AND FIFTY-SEVEN ILLUSTRATIONS. 



PHILADELPHIA: 



LEA BROTHERS & CO 



1895. 



