2f^ 



ELEMENTS 



OF 



WATER BACTERIOLOGY 



WITH SPECIAL REFERENCE TO 



SANITARY WATER ANALYSIS 



BY 



SAMUEL GATE PRESCOTT 



Professor of Industrial Mictobiology irt the Massachusetts 

 Institute of Technology 



AND 



CHARLES-EDWARD AMORY WINSLOW 



Director, Division of Publicity and Education, Xew York State Department of 



Health, and Curator of Public Health, American Museum of Natural 



Hiitory, New York 



THIRD EDITION. REWRITTEN 



SECOND THOUSAND. RE\7SED 



NEW YORK 



JOHN WILEY & SONS, Inc. 



London: CHAPMAN & HALL. Limited 



