Excerpt from State Mining Laws on the Use of Electricity in and About Coal Mines The first State to have a coal-mining law was Pennsylvania, which enacted a law, for Schuylkill County only, in 1869. The first State to enact a coal-mining law governing all the coal mines in the State was Illinois in 1872, followed by Ohio in 1873. Pennsylvania in 1870 enacted a law for anthracite mines only, but did not enact similar laws for bituminous mines until 1877. At least 10 other States enacted coal-mining laws between the years 1870 and 1890. Before 1890 electricity was little used in coal-mining operations and therefore practically no provisions governing the installation, inspection, or maintenance of electrical equipment were made in any of the laws enacted up to 1890. In the law of Colorado, approved April 8, 1885, there is a reference to the use of telephones, probably the first reference to electrical equipment of any kind in a State mining code. 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.

Excerpt from Electricity as Applied to Mining In a book of this nature, with its 'electrical' side and its 'mining' side, joint authorship is, if not absolutely essential, at least advantageous, for the electrical engineer and the mining engineer must work hand in hand if success in electrical opera tions is to be achieved. 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.

Excerpt from Electricity in Coal Mining Many good engineering handbooks are to be found dealing with the details of electrical construction and the installation of mining machinery but the writer feels that there maybe a demand for a small treatise covering, in a general way, the many phases of electrical engineering as applied to coal mining. Such a book would probably be of use to the investor or the operator in outlining methods of procedure and to the operating engineer in tracing the foundations upon which an electrical power plant may be established and operated in the most efficient manner. In securing data upon which some of the machinery is described and for many of the photographs from which cuts have been made the writer wishes to acknowledge the help of the General Electric Co., Westinghouse Electric and Manufacturing Co., Goodman Manufacturing Co., Jeffrey Machine Co., and other manufacturers who have assisted in the work. The writer also wishes to acknowledge his indebtedness to the Editors of Coal Age for manuscript corrections and to the McGraw-Hill Book Co. Inc., for the able manner in which the work of publishing has been carried out. 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.

Excerpt from Shot Firing in Coal Mines by Electricity Controlled From Outside The 500-volt direct-current power used for firing shots is supplied from a power-house generator of large capacity, the connecting line from which is controlled by a locked switch at the mine. 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.

Excerpt from Modern Methods of Producing Coal: 1902 Catalogue Coal Mining The company appreciates that the Electric Chain Machine possesses some advantages over the Pick Machine, though its use is more limited, and has therefore designed a radical departure from the existing machines, which is here presented for the first time. 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.