MICROBIOLOGY 



A TEXT-BOOK OF 



MICROORGANISMS GENERAL AND APPLIED 



CONTRIBUTORS 



F. T. Bioletti, Berkeley, California. 

 R. E. Buchanan, Ames, Iowa. 

 M. Dorset, Washington, D. C. 

 S. F. Edwards, Guelph, Canada. 

 W. D. Frost, Madison, Wisconsin. 

 F. C. Harrison, Macdonald College, 



Canada. 



E. G. Hastings, Madison, Wisconsin. 

 H. W. Hill, Minneapolis, Minnesota. 

 W. E. King, Detroit, Michigan. 



J. G. Lipman, New Brunswick, N. J, 

 W. J. MacNeal, New York City 

 E. F. McCampbell, Columbus, Ohio. 

 Earle B. Phelps, Boston, Massachusetts. 

 Otto Rahn, East Lansing, Michigan. 

 M. H. Reynolds, St. Paul, Minn. 

 W. G. Sackett, Fort Collins, Colo. 

 W. A. Stocking, Ithaca, New York. 

 Charles Thorn, Starrs, Connecticut. 

 J. L. To'dd, Montreal, Canada. 



EDITI;D i;v 



CHARLES E. MARSHAL'. 

 Amherst, Massachusetts 



PROFESSOR OF MICROBIOLOGY AND DIRECTOR OF GRADUATE SCHOOL 

 MASSACHUSETTS AGRICULTURAL COLLEGE 



WITH 128 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO. 



1012 WALNUT STREET 

 1912 



