Originally published in the early 20th century, this book provides a comprehensive overview of the science and technology of coal-tar and ammonia, two key chemical products of the industrial era. Lunge's lucid explanations and detailed illustrations make this a valuable resource both for historians of science and for chemists seeking to deepen their understanding of these important compounds. 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.