Author: John Ernest HodgsonPublisher:
ISBN:
Category : Gold dredging
Languages : en
Pages : 132
Book Description
The Dredging of Gold Placers
Author: John Ernest HodgsonPublisher:
ISBN:
Category : Gold dredging
Languages : en
Pages : 132
Book Description
The Dredging of Gold Placers (Classic Reprint)
Author: John Ernest HodgsonPublisher:
ISBN: 9781331942801
Category : Technology & Engineering
Languages : en
Pages : 118
Book Description
Excerpt from The Dredging of Gold Placers During the past two years the writer has contributed to English and American periodicals several articles, dealing with the phase of mining to which the following pages are devoted. Some interest appears to have been aroused among both mining men and the lay public by these articles, and the wish has often been expressed that they should be incorporated in one volume. This book is an attempt to meet that desire. The industry is a comparatively new one, and the views of dredging men in regard to many questions, both of construction and design, are still in a state of flux. This book is offered to the world, therefore, not by any means as a technical work, but in the sincere hope that it will help and interest company directors, property managers, prospectors, and those of the investing public who have acquired, or think of acquiring, a share interest in a gold-dredging concern. 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.
Placer Gold Deposits of the Sierra Nevada
Author: Paul D. MorrisonPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 196
Book Description
Now available in one volume, the major placer locations of the Sierra Nevada, taken from the original publications of that region. Complete with maps and descriptive text.
Library of Congress Catalogs
Author: Library of CongressDrilling for Placer Gold (Classic Reprint)
Author: Walter H. GardnerPublisher:
ISBN: 9781332236732
Category : Technology & Engineering
Languages : en
Pages : 204
Book Description
Excerpt from Drilling for Placer Gold The Keystone Drill, as universally used, is not an instrument of precision. Gold particles are not distributed with mathematical symmetry. One drill hole to an acre in ground that is 50 feet in depth only yields for examination part of the whole! Ordinary common sense and care on the part of the operator and panner are sufficient to insure acceptable field work. Meticulous precision or elaborate core measurements are generally absurd. For after the depths have been recorded and the gold weighed, there comes the calculation of the values of precious metal in great blocks of gravel. There is no fixed formula. The experienced Engineer, to whom such work should be entrusted, will compensate for high variations, for loose and swelling ground, for sand and clay, for rusty gold - and his calculations will of necessity contain approximations that eclipse minor errors of the field and nullify minute measurements. Indeed, field work with the Keystone Drill need not be conducted by men of profound skill. Just so the work is done in a consistent manner under the occasional eye of a competent engineer; just so the results are interpreted in the light of experience - then will the final figures carry the full weight of authority. There is no mystery about field work - and should there be, the following pages will clarify the mode of procedure. 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.
Certified Copy of Compiled Statement of Domestic Corporations Whose Corporate Powers Have Been Suspended, and Foreign Corporations Whose Right to Do Intrastate Business Has Been Forfeited
Author: California. Office of State ControllerPublisher:
ISBN:
Category :
Languages : en
Pages : 36
Book Description
Classic Concepts and New Directions
Author: Lon D. AbbottPublisher: Geological Society of America
ISBN: 0813700337
Category : Science
Languages : en
Pages : 398
Book Description
"This guide's 14 chapters, which span the Rocky Mountain region's 1.7-billion-year history, give a retrospective glimpse of early geologic ideas being forged, bring the latest mapping and analytical results from classic locations, and introduce techniques that will form the bedrock of our geologic understanding in the years to come"--
Where to Prospect for Gold in Alaska Without Getting Shot!
Author: Ron WendtPublisher:
ISBN: 9781886574120
Category : Gold mines and mining
Languages : en
Pages : 0
Book Description
This guide reveals where you can pan, dredge, detect, or sluice for gold legally, and without hassle.
Library of Congress Catalog
Author: Library of CongressPublisher:
ISBN:
Category : Subject catalogs
Languages : en
Pages : 662
Book Description
Author: