Excerpt from A System of Mineralogy: Including an Extended Treatise on Crystallography; With an Appendix, Containing the Application of Mathematics to Crystallographic Investigation, and a Mineralogical Bibliography A few minerals here introduced, have not been provided with systematic names. It appeared advisable to forbear naming them, until their specific characters are more fully established. 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.