DEAN OF MECHANIC ARTS
NORTH DAKOTA AGRICULTURAL COLLEGE
First Edition
McGRAW-HILL BOOK COMPANY, Inc.
239 WEST 39TH STREET. NEW YORK
LONDON: HILL PUBLISHING CO., Ltd.
6 & 8 BOUVERIE ST., E. C.
1918
Copyright, 1918, by the
McGraw-Hill Book Company, Inc.