Excerpt from Mineral Resources of Canada Bulletin, 1904 Among other species lepidolite or lithia mica is occasionally found, generally in small quantities, and has as yet been neglected. With the phlogopites, portions which are usually known as cloudy or milky mica occur, but this apparently is of little commercial value. Deposits of muscovite are found at widely separated points. They are usually confined to dykes of a whitish pegmatite granite which cut the ordinary gneisses of the Laurentian. 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.