PRINCIPLES AND PRACTICE

BY

WILLIAM HENRY LEFFINGWELL

MEMBER, THE TAYLOR SOCIETY,

THE SOCIETY OF INDUSTRIAL ENGINEERS, AND ASSOCIATE OF
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

PRESIDENT, THE LEFFINGWELL-REAM CO.
AUTHOR, "SCIENTIFIC OFFICE MANAGEMENT," ETC.

CHICAGO & NEW YORK

A. W. SHAW COMPANY

LONDON, A. W. SHAW AND COMPANY. LIMITED

TO THE TAYLOR SOCIETY

An appreciation of its inspirational and educational influence