BIOLOGY 



GENERAL AND MEDICAL 





BY 



JOSEPH McFARLAND, M. D. 



PROFESSOR OF PATHOLOGY ii*D BACTERIOLOGY, MEDICO-CHIRURGICAL 



COLLEGE OF PHILADELPHIA; FELLOW OF THE COLLEGE OF 



PHYSICIANS OF PHILADELPHIA 



WITH 160 ILLUSTRATIONS 



OF THE 



UNIVERSITY 



OF 



PHILADELPHIA AND LONDON 



W. B. SAUNDERS COMPANY 

 1910 



