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Drilling for Placer Gold

Drilling for Placer Gold PDF Author:
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 204

Book Description


Drilling for Placer Gold

Drilling for Placer Gold PDF Author:
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 204

Book Description


Drilling for Placer Gold (Classic Reprint)

Drilling for Placer Gold (Classic Reprint) PDF Author: Walter H. Gardner
Publisher:
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.

Placer Examination; Principles and Practice

Placer Examination; Principles and Practice PDF Author: John H. Wells
Publisher:
ISBN:
Category : Placer deposits
Languages : en
Pages : 168

Book Description


Drilling for Placer Gold

Drilling for Placer Gold PDF Author: Walter H. Gardner
Publisher: Legare Street Press
ISBN: 9781016847582
Category : Technology & Engineering
Languages : en
Pages : 0

Book Description
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.

Drilling for Placer Gold

Drilling for Placer Gold PDF Author: Keystone Driller Company, Beaver Falls, Pa
Publisher:
ISBN:
Category : Gold mines and mining
Languages : en
Pages : 196

Book Description


Placer Examination

Placer Examination PDF Author: John H. Wells
Publisher:
ISBN:
Category : Placer deposits
Languages : en
Pages : 228

Book Description


Drilling for Placer Gold - Scholar's Choice Edition

Drilling for Placer Gold - Scholar's Choice Edition PDF Author: Walter H. Gardner
Publisher:
ISBN: 9781297001147
Category :
Languages : en
Pages : 202

Book Description
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.

Drilling for Placer Gold - Primary Source Edition

Drilling for Placer Gold - Primary Source Edition PDF Author: Walter H. Gardner
Publisher:
ISBN: 9781293777794
Category :
Languages : en
Pages : 202

Book Description


Gold Placer Mining

Gold Placer Mining PDF Author: C. M. Romanowitz
Publisher:
ISBN:
Category : Gold dredging
Languages : en
Pages : 66

Book Description


Drilling for Placer Deposits of Gold and Platinum in the Jungles of Colombia

Drilling for Placer Deposits of Gold and Platinum in the Jungles of Colombia PDF Author: Theodore Owen Seiberling
Publisher:
ISBN:
Category : Chocó (Colombia)
Languages : en
Pages : 188

Book Description
"In the following report I have made no attempt to "white-wash" or to exaggerate conditions as I found them in the Chocó. In plain language I have endeavored to give the reader a picture of the obstacles met, and overcome by the engineer in his search for placer deposits of gold and platinum with the prospect drill in the jungle"--Foreword, leaf [1].