A GENERAL PHYSIOLOGY 



FOR HIGH SCHOOLS 



BASED UPON THE NERVOUS SYSTEM 



BY 



M. L. MACY, L.B. 



Yy 

 ASSISTED BY 



H. W. NORRIS, A.M. 



PROFESSOR OF BIOLOGY, IOWA COLLEGE 



" The physiology of the nervous system is emphatically the physiology 

 of the future." MICHAEL FOSTER, M.D., F.R.S. 



NEW YORK-:. CINCINNATI : CHICAGO 



AMERICAN BOOK COMPANY 



