V 



HUMAN PHYSIOLOGY 



THE BASIS OF 



SANITARY AND SOCIAL SCIENCE, 



T. L. NICHOLS, M.D. 



[I 



WITH NUMEROUS ILLUSTRATIONS. 



3'^x 



\* 



r>' 



LONDON: 



NICHOLS & CO., 23 OXFORD STREET, W. 



1893. 



[All Rights Reserved} 



