FROM A SANITARY STANDPOINT.

BY

ELLEN H. RICHARDS AND ALPHEUS G. WOODMAN,

Instructor in Sanitary Chemistry.
Massachusetts Institute of Technology.

Assistant Projessor of Food Analysis,
Massachusetts Institute of Technology.

"These cannot be taken as sufficient . . . in these times when
every word spoken finds at once a ready doubter, if not an opponent.
They are, however, specimens, and will serve to make comparisons
in time to come."-ANGUS SMITH.

"The ideal scientific mind, therefore, must always be held in a
state of balance which the slightest new evidence may change in one
direction or another. It is in a constant state of skepticism, knowing
full well that nothing is certain."-HENRY A. ROWLAND.

THIRD EDITION, REVISED AND ENLARGED.

FIRST THOUSAND.

NEW YORK:

JOHN WILEY & SONS.

LONDON: CHAPMAN & HALL, LIMITED.

1909.