This textbook offers a thorough introduction to the principles and applications of descriptive geometry, a branch of mathematics that deals with the representation of three-dimensional objects on a two-dimensional surface. With its numerous examples and exercises, this book is an essential resource for students and teachers of engineering, architecture, and design. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.