The Relation Between P.D. and Spark-Length for Small Values of the Latter investigates the relationship between potential difference (P.D.) and spark length, specifically focusing on small values of spark length. This study provides valuable insights into the nature of electrical discharge and its behavior under specific conditions. It is aimed at electrical engineers and physicists interested in understanding the intricacies of spark formation and its dependence on voltage and distance. This work by Glenn Moody Hobbs offers a detailed examination useful to researchers and professionals working in the fields of high-voltage engineering and plasma physics. The research contributes to a deeper understanding of dielectric breakdown phenomena. 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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.