V 



LABORATOEY MANUAL f 



OF 



GENERAL MICROBIOLOGY 



WITH SPECIAL REFERENCE TO THE 

 MICROORGANISMS OF THE SOIL 



BY 



EDWIN BROUN FRED, Ph.D. 



Professor of Agricultural Bacteriology, University of Wisconsin 

 AND 



SELMAN A. WAKSMAN, Ph.D. 



Professor of Soil Microbiology, Rutgers University 



C 



FiKST Edition 

 Second Impression 



McGRAW-HILL BOOK COMPANY, Inc. 

 NEW YORK: 370 SEVENTH AVENUE 



LONDON: 6 & 8 BOUVERIE ST., E. C. 4 



1928 



