MICROBIOLOGY 



7 



A TEXT-BOOK OF 



MICROORGANISMS GENERAL AND APPLIED 



CONTRIBUTORS 



F. T. Bioletti, Berkeley, California. J. G. Lipman, New Brunswick, New Jersey. 



R. E. Buchanan, Ames, Iowa. W. J. MacNeal, New York, New York. 



W. V. Cruess, Berkeley, California. E. F. McCampbell, Columbus, Ohio. 



M. Dorset, Washington, D. C. E. B. Phelps, Washington, D. C. 



S. F. Edwards, Lansing, Michigan. O. Rahn, Elbing, Germany. 



E. Fidlar, London, Ontario. L. F. Rettger, New Haven, Connecticut. 

 W. D. Frost, Madison, Wisconsin. M. H. Reynolds, University Farm, St. Paul, 

 A. Guilliermond, Lyons, France. Minnesota. 



F. C. Harrison, Macdonald College, Que., Canada. W. G. Sackett, Fort Collins, Colorado. 

 E. G. Hastings, Madison, Wisconsin. W. A. Stocking, Ithaca, New York. 

 H. W. Hill, London, Ontario. C. Thorn, Washington, D. C. 



Arao Itano, Amherst, Massachusetts. J. L. Todd, Montreal, Quebec. 



W. E. King, St. Paul, Minnesota. Z. Northrup Wyant, East Lansing, Michigan. 



EDITED BY 



CHARLES E. MARSHALL 



Amherst, Massachusetts 



PROFESSOR OF MICROBIOLOGY AND DIRECTOR OF GRADUATE SCHOOL 

 MASSACHUSETTS AGRICULTURAL COLLEGE 



THIRD EDITION REVISED AND ENLARGED 

 WITH 200 ILLUSTRATIONS 



PHILADELPHIA 



P. BLAKISTON'S SON & CO, 



1012 WALNUT STREET 



