ELEMENTS OF PHYSIOLOGY 



BEING PART I OF "THE HUMAN MECHANISM 



ITS PHYSIOLOGY AND HYGIENE AND 



THE SANITATION OF ITS 



SURROUNDINGS" 



BY 

 THEODORE HOUGH 



Professor of Physiology and Dean of the Department of 

 Medicine in the University of Virginia 



AND 



WILLIAM T. SEDGWICK 



Professor of Biology and Public Health and Lecturer on Hygiene 

 and Sanitation, Massachusetts Institute of Technology 



R E VIS K I) EDI 77 ON 



GINN AND COMPANY 



BOSTON NEW YORK CHICAGO LONDON 

 ATLANTA DALLAS COLUMBUS SAN FRANCISCO 



