Download or read book A History of Gold Dredging in Idaho written by Clark C. Spence and published by University Press of Colorado. This book was released on 2016-06-15 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A revolution in placer mining from inception in the 1880s until its demise in the 1960s and its impact on Idaho, the nation's fourth leading producer of dredged gold which provides a lens through which to observe the practice and history of gold dredging around the world"--
Download or read book Dredges and Gold Dredging written by New York Engineering Company and published by . This book was released on 1913 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Business of Gold Dredging written by New York Engineering Company and published by . This book was released on 1922 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredging in California written by J. E. Doolittle and published by . This book was released on 1908 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredging the New Industrial written by Henry Stanhope Bunting and published by . This book was released on 1903 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredging written by Cecil Clement Longridge and published by . This book was released on 1905 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredges and Gold Dredging written by Company New York Engineering and published by . This book was released on 1901 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredging in California written by California State Mining Bureau and published by . This book was released on 1910 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredging for Gold in California written by D'Arcy Weatherbe and published by . This book was released on 1907 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredges and Gold Dredging Classic Reprint written by New York Engineering Company and published by Forgotten Books. This book was released on 2017-09-17 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Dredges and Gold Dredging Our supervising engineers are constantly visiting the mills, inspecting, selecting and testing our materials; there fore, we get the best selection and quality to meet our wants in the shortest time possible. Hence we are able to turn out complete dredges in much shorter time, and at less cost, than any of the Western Manufacturers. 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.
Download or read book The History and Development of Gold Dredging in Montana written by Hennen Jennings and published by . This book was released on 1916 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notes on Gold Dredging with Reference to the Introduction of the Industry Into New South Wales written by John Blockley Jaquet and published by . This book was released on 1898 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredges written by Yuba Manufacturing Company, San Francisco and published by . This book was released on 1927 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold Dredging in the United States Classic Reprint written by Charles Janin and published by Forgotten Books. This book was released on 2018-09-04 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Gold Dredging in the United States The recovery of gold from sands and gravels is one of the oldest forms of mining; it antedates history and has been practiced by savage peoples. In North America the search for placer gold has been a powerful agency in the exploration and development of unknown regions and has profoundly influenced the course of our civilization. With the progress of invention, the improvements in machinery, and the availability of large capital for the conduct of great operations, the tendency in placer, as in many other branches of mining, has been toward the working of extensive but comparatively low-grade deposits. The early miner washed the rich spots in stream beds or terraces with his pan, his long tom, and his primitive sluice. Then followed the growth of hydraulic mining and the use of giants supplied with water under pressures of hundreds of pounds to the square inch that could work at a profit gravels whose gold tenor was less than 3 cents to the cubic yard. Finally came the dredge that could handle deposits lying so far below water level as to be beyond attack by other methods. Although the gold dredge was first successful on a commercial scale in New Zealand, it has reached its present strength and efficiency in this country and its development is a monument to the daring, per severance and technical skill of the many men, mine owners and engineers who have each contributed something to the final result. The Bureau of Mines, authorized to conduct investigations for the purpose of increasing efficiency in the mineral industries, had its attention called some years ago to the need of a comprehensive report on gold dredging in the United States. The director of the bureau recognized that such a report should summarize the development of the gold dredge, should describe in detail the essential features of present-day dredges, should discuss the facts that determine whether a placer deposit can be profitably dredged, and should point out the approved methods of prospecting placer ground and of operating dredges. 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.
Download or read book The Dredging of Gold Placers written by John Ernest Hodgson and published by . This book was released on 1911 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety Rules for Gold Dredges Quarry Safety Rules written by California. Division of Industrial Safety and published by . This book was released on 1917 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 1918 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
