Excerpt from Machine Drawing This book aims to teach the fundamental principles of mechanical drawing to men who wish to become draftsmen, or who for any other reason wish to acquire a working knowledge of the subject as practiced in the best drafting offices. The material in this volume is the first half of the instruction papers in Machine Drawing, as developed and used by the Extension Division of the University of Wisconsin. Part of the material has been taken from Woolley and Meredith's "Shop Sketching," of the University Extension Division series. The second volume, Advanced Machine Drawing, will be largely devoted to the applications of machine drawing to the more specialized lines of work, such as gearing, isometric, cabinet, and other special methods of projection, electrical, structural, and piping conventions, and advanced problems in detail and assembly drawings of complete machines, sketching, intersections and developments, and sheet metal pattern drawing. In order to secure the interest of the student at the outset, working drawings are made by the student from the very beginning. The text and the problems have been carefully prepared and arranged so as to develop speed, accuracy, neatness, and a knowledge of the best drafting room practice. Believing that draftsmen should be able to make neat, clear, comprehensive, freehand sketches of machine parts, the author has introduced a chapter on technical sketching. In addition to being suitable for home study this book is also adapted as a text for trade, industrial and continuation schools. The author desires to acknowledge his indebtedness to Mr. Earle B. Norris, Associate Professor of Mechanical Engineering, University of Wisconsin, for a careful reading of the proof, for checking the illustrations, and for many valuable criticisms and suggestions; and to Mr. Joseph W. L. Hale, of the Department of University Extension, Massachusetts Board of Education, for valuable suggestions. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.