WORKS OF

GEORGE CHANDLER WHIPPLE

PUBLISHED BY

JOHN WILEY & SONS, INC.

The Microscopy of Drinking Water.

Third Edition, Rewritten and Enlarged.

With a Chapter on the Use of the Microscope, by John
W. M. Bunker, Ph.D.

xxi +409 pages. 6 by 9. 74 figures, 6 full-page plates
in the text, and 19 plates of organisms in colors. Cloth,
$4.00 net.

Vital Statistics.

xii+517 pages. 4 by 7. 63 figures. Flexible "Fabrikoid" binding, $4.00 net.

BY HENRY BALDWIN WARD

AND

GEORGE CHANDLER WHIPPLE

AND ASSOCIATES

Fresh-Water Biology.

ix+1111 pages. 6 by 9. 1547 figures. Cloth, $6.00

net.

AN INTRODUCTION TO THE SCIENCE
OF DEMOGRAPHY

BY

GEORGE CHANDLER WHIPPLE

Professor of Sanitary Engineering in Harvard University
Member of the Public Health Council, Massachusetts
State Department of Health

FIRST EDITION

NEW YORK

JOHN WILEY & SONS, INC.

LONDON: CHAPMAN & HALL, LIMITED

1919
HW