Excerpt from Annual Report of the Department of Mines for the Fiscal Year Ending June 30, 1920: In Two Sections Since the year 1883 the average gross tons of coal produced per each fatality inside the mines have been 161, 480 tons, including 1920, which is 278, 716 gross tons. At the mines where fatal accidents occurred there was an average of one life lost for each 89, 891 gross tons of coal produced. The 287 lives lost inside the mines during the year occurred at 211 mines' employing 23, 684 persons inside and produced gross tons of coal, while the other mines at which not a single life was lost inside the mines produced gross tons. During the fiscal year ended June 30, 1920, the causes of accidents in which lives were lost inside the mines, are summarized as follows. 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.