and ANALYSIS

FOR THE USE OF PUBLIC ANALYSTS, HEALTH OFFICERS, SANITARY CHEMISTS, AND FOOD ECONOMISTS

BY.

ALBERT E. LEACH, S.B.

Late Chief of the Denver Food and Drug Inspection Laboratory, Bureau of Chemistry,
U.S. Department of Agriculture; Late Chief Analyst of the Massachusetts
State Board of Health

REVISED AND ENLARGED BY

ANDREW L. WINTON, Ph.D.,

Formerly Chief of the Chicago Food and Drug Laboratory, Bureau of Chemistry, U.S. Department of Agriculture; Formerly in Charge of the Analytical Laboratory, Connecticut Agricultural Experiment Station

FOURTH EDITION

TOTAL ISSUE, ELEVEN THOUSAND

NEW YORK

JOHN WILEY & SONS, Inc.
LONDON: CHAPMAN & HALL, LIMITED

AFFECTIONATELY DEDICATED TO THE MEMORY OF

Charles Pomeroy Worcester,

FORMER ANALYST OF THE MASSACHUSETTS STATE BOARD OF Health,

WHOSE LOVABLE PERSONALITY AND STERLING INTEGRITY WERE

A CONSTANT INSPIRATION DURING MANY YEARS

OF CLOSE COMPANIONSHIP TO

THE AUTHOR.