ELEMENTARY 



BACTERIOLOGY 



PROTOZOOLOGY 



IK 



FOR THE USE DB! NE^ES 



(r 



ERBEttT, FOX, M.D. 



DIRECTOR OFi THEVj\fl|LLIAM BETTER LABORATORY OF CLINICAL MEDICINE IN 



THE laNIVEftSlTY* pf PENNSYLVANIA ; PATHOLOGIST TO THE 



, ZOOLOGICAL SOCIETY OF PHILADELPHIA, ETC. 



MAJOR, M. C., 'U.S.A. 



THWD EDITION, THOROUGHLY REVISED 



ILLUSTRATED WITH 68 ENGRAVINGS AND 

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LEA & FEBIGER 



PHILADELPHIA AND NEW YORK 





