Excerpt from Third Appendix to the Sixth Edition of Dana's System of Mineralogy Clarke, F. W. The Constitution of the Natural Silicates. U. S. G. 8. Bull. 588. 128 pp. Washington, 1914. Daly, R. A. Igneous Rocks and their Origin. 563 pp. New York, 1914. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
James Dwight Dana (1813-1895) was an American geologist, mineralogist and zoologist. He made important studies of mountain-building, volcanic activity, and the origin and structure of continents and oceans.