This groundbreaking book offers a wealth of new information and insights into the world of inland navigation and mining. Edmund Ronald Leach's innovative ideas and practical techniques demonstrate how any river or stream can be made navigable, and how the earth's mineral resources can be mined more efficiently and profitably than ever before. With clear explanations and detailed illustrations, this book is an invaluable resource for anyone interested in the history, technology, and economics of navigation and mining. 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.