MICROORGANISMS 



INCLUDING 



BACTERIA AND PROTOZOA 



A PRAITK'AL MAM AL FOE STUDENTS, PHYSICIANS 

 AND HEALTH OFFICERS 



BY 



WILLIAM HALLOCK PARK, M.D. 



I'HOFKSSOH OF BACTERIOLOGY AND HYGIEXK, UNIVERSITY' 'AND BELLEVUE HOSPITAL, MEDICAL 



COLLEGE, AND DIRECTOR OF THE RESEARCH LABORATORY OF THE DEPARTMENT 



OF HEALTH, CITY OF NEW YORK 



ASSISTED BY 



ANNA W. WILLIAMS, M.D. 



ASSISTANT DIRECTOR OF THE RESEARCH LABORATORY 



SECOND EDITION, ENLARGED AND THOROUGHLY REVISED 

 WITH 165 ENGRAVINGS AND 4 FULL-PAGE PLATES 



LEA BROTHERS & CO. 



XKW YORK AND PHILADELPHIA 

 1905 



