This book is a groundbreaking exploration of the electro-chemical properties of inorganic materials, with a focus on coal and limestone. Titus Salter Emery uses cutting-edge scientific research to explain how these materials interact with electricity and each other, and how this knowledge can be applied to a range of industries, from energy production to construction. This book is an essential read for anyone interested in materials science or electro-chemistry. 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.