Arthur Crotch's study of the early telegraph systems developed by David E. Hughes and Emile Baudot is a fascinating look at the history of telecommunications. With detailed diagrams and technical explanations, Crotch offers a comprehensive analysis of these groundbreaking technologies and their impact on early industrial society. 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.