Excerpt from Manual of the Chemical Analysis of Rocks It is therefore evident that we possess in chemical analysis a means of investigation that complements, and is of value fully commensurate with, the study of rocks in the field or with the microscope. That this is generally recognized is shown by the increasing prominence given to chemical analyses in recent petrological and petrographical papers, as well as in publica tions of an economic character. It is also shown by the attention given to this study by official organizations, and by the growing number of those who make, or who desire to make, analyses of rocks. 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.

Analytical methods used in the Geologic Division laboratories of the U.S. Geological Survey for the inorganic chemical analysis of rock and mineral samples.