This book is an important work of 20th-century engineering, describing a novel type of vacuum tube used to control the flow of electrical current. Laird was one of the leading pioneers of vacuum tube design, and his work revolutionized the field. This book will appeal to anyone with an interest in the history of electronics and the development of modern technology. 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.

This work contains the principles of operation of The Thermionic Vacuum Tube, and coordinates the phenomena encountered in a study of this field.

Batcheller Collection.