Author: Charles PreliniPublisher:
ISBN:
Category : Dredging
Languages : en
Pages : 330
Book Description
Dredges and Dredging
Author: Charles PreliniPublisher:
ISBN:
Category : Dredging
Languages : en
Pages : 330
Book Description
Dredges and Dredging (Classic Reprint)
Author: Charles PreliniPublisher: Forgotten Books
ISBN: 9780331590296
Category : Technology & Engineering
Languages : en
Pages : 328
Book Description
Excerpt from Dredges and Dredging It is a singular fact that nearly every man feels that he is com petent to carry on a job of earth or rock excavation, yet there is nothing more difficult than to do such work economically. Man since prehistoric times has been digging into mother earth, yet there is always something to learn regarding excavation work. The last word will never be said on the subject. In this treatise only one class of excavation is touched upon, namely, dredging. If one needs an excuse for offering to the profession this book, it is found in the vast importance of dredging in our commercial life. Not only are there millions upon millions of dollars invested in dredging plants and outfits, but it has only been possible to con struct and use vessels of great tonnage, owing to the wonderful achievements of the dredge designers and the engineers and con tractors engaged in operating such machines. Then, too, great canals are constructed with the aid of dredges, large areas of swamp lands are reclaimed for the use of man with such machines, and precious metals are recovered from streams or river bottoms with their aid. This treatise is written with a view of presenting the subject in a concise and logical manner, so that it may be found useful both to the man of experience and to the beginner or student. Should it so prove the author will feel that his labor has not been in vain. The thanks of the author are due Mr. Daniel J. Hauer for many valuable suggestions. C. P. 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.
Dredges and Gold Dredging (Classic Reprint)
Author: New York Engineering CompanyPublisher: Forgotten Books
ISBN: 9781527972445
Category : Technology & Engineering
Languages : en
Pages : 36
Book Description
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.
Dredging Engineering (Classic Reprint)
Author: F. Lester SimonPublisher: Forgotten Books
ISBN: 9780331640373
Category : Technology & Engineering
Languages : en
Pages : 192
Book Description
Excerpt from Dredging Engineering With the reader's indulgence We will explain just what this small book is by first defining what it is not. It is not a compendium Of statistics. Neither is it a record Of the actual performance Of specific dredges Of all kinds and under all conditions; nor yet a compilation Of dredging cost data. Such information is already minutely available in the Annual Reports of the Chief of Engineers, U. S. Army, and in the records Of the various departments of commonwealths and municipalities controlling dredging operations in their respective localities. 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.
Dredges and Dredging
Author: Gold Dredging in the United States (Classic Reprint)
Author: Charles JaninPublisher: Forgotten Books
ISBN: 9781391883502
Category : Technology & Engineering
Languages : en
Pages : 1084
Book Description
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.
DRAG BUCKET GOLD DREDGE (CLASSIC REPRINT).
Author: NEW YORK ENGINEERING. COMPANYPublisher:
ISBN: 9781333601409
Category :
Languages : en
Pages : 0
Book Description
DREDGES & DREDGING
Author: Charles PreliniPublisher:
ISBN: 9781374615588
Category : History
Languages : en
Pages : 326
Book Description
Dredges And Dredging
Author: Charles PreliniPublisher: Wentworth Press
ISBN: 9781013135255
Category :
Languages : en
Pages : 328
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.
Gold Dredging in California (Classic Reprint)
Author: Lewis E. AuburyPublisher: Forgotten Books
ISBN: 9781332004249
Category : Technology & Engineering
Languages : en
Pages : 144
Book Description
Excerpt from Gold Dredging in California Gentlemen: I have the honor to transmit Bulletin No. 36, "Gold Dredging in California." The issuance of this Bulletin has been contemplated for some time, and some information concerning the subject was obtained in 1902, but owing to the rapid changes which have affected this branch of the gold mining industry, and the difficulty met with in securing accurate data which would serve to illustrate the actual conditions of gold dredging in this State, it has been deemed best to delay the publication of the report until the present time. The items of costs of operation, which are so vital to a publication of this nature, have been extremely difficult to obtain from many of the companies engaged in dredging. This has not been due particularly to any intention on the part of the companies to withhold the information, but to the fact that many operators have not until recently preserved a detailed record of expenditures. I wish to here extend many thanks to Col. J. E. Doolittle for his valuable assistance in the preparation of this Bulletin, and also to the many operators who have furnished information and assistance which have made this publication possible. I also wish to thank Mr. O. W.Jasper of Oroville, Mr. Howard D. Smith, and Mr. A. H. Ward, who rendered assistance; also many others whose names are not here mentioned and who have aided in the work by furnishing valuable information. Engaged at various times in securing data for this report, and who were employed as Field Assistants, were Mr. P. C. Dubois, Mr. John D. McGillivray, Mr. William Forstner, and Mr. G. Holmes, to whom I wish to express due recognition for their services. 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.