PHYSIOLOGY 



EXPEKIMENTAL AND DESOEIPTIYE 



BY 



BUEL P. COLTON, A.M. 



AUTHOR OF " PRACTICAL ZOOLOGY," AND PROFESSOR OF NATURAL SCIENCE 

 IN THE ILLINOIS STATE NORMAL UNIVERSITY. 



" What a piece of work is a man ! how noble in reason ! 

 how infinite in faculty ! in form and moving, how express 

 and admirable ! in action, how like an angel ! in appre- 

 hension, how like a god ! the beauty of the world ! the 

 paragon of animals ! " 



BOSTOX, U.S.A. 



D. C. HEATH & GO., PUBLISHERS 

 1910 



