This appendix to Physics of the Earth's Crust provides additional data and analysis on the physical properties and structure of the earth's crust. Drawing on the latest scientific research and his own extensive experience as a geologist, the Rev. Osmond Fisher provides new insights into the processes that shape our planet and influence everything from earthquakes to mineral resources. This book is an essential companion to the classic work on geology, and a valuable resource for anyone interested in the physical sciences. 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.