This groundbreaking scientific study was one of the first to explore the electrical properties of mercury vapor tubes. Its author, Benjamin Liebowitz, was an early pioneer in the field of electrical engineering, and his work laid the foundation for many of the technological innovations of the 20th century. This book remains an essential reference for anyone interested in the history and development of electrical devices.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.