City Bacteriologist and Chemist, Ottawa; Capt. Canadian Army Hydrological Corps;
Associate Member of Committee on Water Supplies, American Public Health
Association; Member of Committee on Water Standards and Standard
Methods of Analysis, American Water Works Association;
Chairman of Committee on Standard Methods of
Analysis, Canadian Public Health Association

FIRST EDITION

NEW YORK
JOHN WILEY & SONS, Inc.
London: CHAPMAN & HALL, Limited
1918