Download or read book Drilling for Placer Gold Classic Reprint written by Walter H. Gardner and published by . This book was released on 2015-08-05 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Drilling for Placer Gold written by and published by . This book was released on 1920 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilling for Placer Gold written by Walter H. Gardner and published by Legare Street Press. This book was released on 2022-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Drilling for Placer Gold written by Keystone Driller Company, Beaver Falls, Pa and published by . This book was released on 192? with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilling for Placer Gold Primary Source Edition written by Walter H. Gardner and published by . This book was released on 2014-02 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Drilling for Placer Gold Scholar s Choice Edition written by Walter H. Gardner and published by . This book was released on 2015-02-13 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Placer Examination Principles and Practice written by John H. Wells and published by . This book was released on 1969 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diamond Drilling for Gold and Other Minerals written by George Alfred Denny and published by . This book was released on 1900 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Placer Examination Principles and Practice written by John H. Wells and published by . This book was released on 2013-05 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Placer Examination Principles and Practices" is a timeless classic published originally by the US Bureau of Land Management as Techniacal Bulletin 4. This classic text covers the examination of all types of Placer Deposits in order to determine the viability of mining them. Some of the things covered are the Geology, Types of Placer Deposits, Sampling Methods from panning up to using bulldozers, Equipment including Exploration and Drilling equipment, Assaying Placers and more. Now back in Print by Miningbooks.com

Download or read book Diamond Drilling for Gold and Other Minerals written by George Alfred Denny and published by Forgotten Books. This book was released on 2017-10-18 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Diamond Drilling for Gold and Other Minerals: A Practical Handbook on the Use of Modern Diamond Core Drills in Prospecting and Exploiting Mineral-Bearing Properties; Including Particulars of the Cost of Apparatus and of Working In the Appendix (pp. 137-158) there will be found various particulars relating to both the Sullivan and the Bullock Diamond Drills, and the special Tools and Supplies required therewith, which will be found use ful by intending purchasers of such appliances. Acknowledgment is due, and is hereby tendered, to the firms who have so obligingly placed their catalogues, cuts, etc., at the Author's disposal. From the materials thus supplied, details of the different drills, as well as other data and information suitable for the work in hand, have been freely extracted. The Author has also to thank Mr. Bennett H. Brough for his courtesy in sanctioning the two full quotations from his Treatise on mine-surveying. 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 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 1084 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 Classic Reprint written by John Ernest Hodgson and published by . This book was released on 2015-07-21 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Oil Prospecting Drilling and Extraction Classic Reprint written by Forest John Swears Sur and published by Forgotten Books. This book was released on 2016-09-15 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Oil Prospecting, Drilling and Extraction In the mining industry for the prospector, miner, geologist and engineer many books have been written. However, the prospector for oil, the driller and the general operator have never had any book giving. Any classified and systematic data. In this book I have, therefore, attempted to fulfill the requirements of the last mentioned. Especially for Canada is this now needed, where vast areas of oil formations with tremendous productive potentialities lie unprospected when wells are being drilled in large numbers in other parts of the World where infinitely fewer indications for large production existed at the initial stage of development. If the petroleum prospector can work from the standpoint of the trained geologist his efforts will be greatly simplified and will be much more effective. This book is designed to furnish the information that will permit the. Prospector to work in. This way. Petroleum geology has been a specialized profession only within the last ten years. Previous to that time all oil men chose locations for wells and did all other work by chance and by guess. 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 Cripple Creek Gold Fields Placers Lodes Classic Reprint written by Colorado Midland Railway Company and published by Forgotten Books. This book was released on 2017-10-22 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Cripple Creek Gold Fields, Placers, Lodes April, 1885. It is true, that the supposed rich deposit of gold was deposited there by human hands for speculative purposes; that the great mine in the new El Dorado was salted, but there was gold within so short a distance of the place where this piece of knavery was practiced, that it seems almost miraculous the mining district was not located at the time. Many an old prospector has examined the outcroppings, and one was even confident enough to run a tunnel into the hill directly under the spot where one of the richest deposits has since been located, but none succeeded in finding the gold. 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 Preliminary Review and Estimate of Mineral Production 1915 written by W. Fleet Robertson and published by . This book was released on 1914 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The History and Development of Gold Dredging in Montana written by Hennen Jennings and published by Forgotten Books. This book was released on 2017-10-28 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The History and Development of Gold Dredging in Montana: With a Chapter on Placer-Mining Methods and Operating Costs Although the purpose of this paper is to describe gold dredging in Montana, a brief mention of some early appliances used in New Zealand, Australia, and California may serve as a world-connecting link in our consideration of the development of gold dredging. 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 Sampling and the Estimation of Gold in a Placer Deposit written by George Richard Fansett and published by . This book was released on 1917 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: