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UNIVERSITY OF WISCONSIN
A series of Industrial and Engineering Education Textbooks, developed under the direction of Dean Louis E. REBER,
University of Wisconsin Extension Division
Norris and Smith's
RAPHY Jansky and Faber's PRINCIPLES OF THE TELE
Part 1.-Subscribers' Apparatus
BATTERIES Koehler's THE PROPERTIES AND USES OF WOOD
PREPARED IN THE
EXTENSION DIVISION OF
EARLE B. NORRIS, M. E.
ing Courses in the University Extension Division
KENNETH G. SMITH, A. B., B. S.
Milwaukee District, University Extension Division
MCGRAW-HILL BOOK COMPANY, INC.
COPYRIGHT, 1913, 1924, BY THE
PRINTED IN THE UNITED STATES OF AMERICA
THE MAPLE PRESS COMPANY, YORK, PA.
In bringing out a second edition of Shop Arithmetic, sincere gratification is expressed for the reception accorded the first edition which ran through seventeen impressions. Twelve years ago there was great need for a plain, practical, interesting text of this kind. The University Extension Division of the University of Wisconsin, for lack of such a book, was obliged to produce this volume in connection with its work. Immediately upon its publication many other Extension Divisions adopted and used the book both for correspondence and class instruction. It has likewise been widely used in trade, continuation, shop, apprentice, and other schools of like character. This extensive use with extraordinary variations in student types has resulted in practical suggestions for change and improvement that have been incorporated in the present revision.
Two entirely new chapters have been added to the book, one on Logarithms and one on the Slide Rule. This additional text material has been found to be desirable particularly for those students who plan to go forward with subsequent studies in industrial or engineering courses.
Mr. Herbert E. Schrader, while instructor in Mechanical Engineering in the University Extension Division, prepared both the new material and the text of the revision. He is to be commended upon the success he achieved in incorporating the newer ideas and later practices in the spirit of the original work. Much valuable assistance and counsel were given by Mr. W. E. Wines and Mr. Herbert B. Byrn of our present staff. Due acknowledgment is also made to the many users of the first edition who made valuable suggestions and contributions towards this revision. It is hoped that this new edition will commend itself to old friends and win new ones.
BEN G. ELLIOTT.
University Extension Division