Book excerpt: Originally published in German in 1846, 'Principles of the Mechanics of Machinery and Engineering' is a classic text on the principles of mechanics. This book covers a wide range of topics in detail, including statics, dynamics, kinematics, and the construction of machines. It is an essential reference for anyone involved in the study or practice of mechanical engineering. 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.