PROFESSOR OF SANITARY ENGINEERING IN COLLEGE OF CIVIL ENGINEERING, CORNELL UNIVERSITY SPECIAL ASSISTANT ENGINEER, NEW YORK STATE DEPARTMENT OF HEALTH
New York
THE MACMILLAN COMPANY
1911
All rights reserved
Copyright, 1911,
By THE MACMILLAN COMPANY.
Set up and electrotyped. Published January, 1911.
Norwood Press
J. S. Cushing Co.—Berwick & Smith Co.
Norwood, Mass., U.S.A.