Excerpt from Library Life, Vol. 1: Staff Bulletin of the Boston Public Library, October 15, 1921The Introduction and Summary to the Mineral Resources of the United States, 1920, 'published by the Geological Survey, Shows the value of the mineral products of the United States from 1880 to 1920 inclusive, by years. The approximate total value of the minerals produced in the United States in the year 1920 was over three billions in excess of the production for 1916.A List of the publications of the United States Geological Survey (not including topographic maps), August, 1921, is one of the most valuable lists of the sort issued by any Government office. The finding list of states, areas, subjects and authors enables one to trace readily every publication which has been issued by the Survey.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.