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California Mines and Minerals

Ingram 出版
2022/11/11 出版

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.

9 特價1282
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Alaska and the Klondike Gold Fields

A C,Harris  著
Ingram 出版
2022/11/11 出版
9 特價1374
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The Arizona Mining Company, its Mines, Property and Organization

Ingram 出版
2022/11/11 出版

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.

9 特價639
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Engineering Geology

Ingram 出版
2022/11/11 出版

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.

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The Copper Mines of the World

Ingram 出版
2022/11/11 出版
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The Arizona Mining Company, its Mines, Property and Organization

Ingram 出版
2022/11/11 出版

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.

9 特價1236
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Metal Spinning

C,Tuells  著
Ingram 出版
2022/11/10 出版

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.

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The Tertiary Gravels of the Sierra Nevada of California

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2022/11/10 出版
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The Sampling and Assay of the Precious Metals

Ingram 出版
2022/11/10 出版

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.

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Gold Deposits of North Carolina

Ingram 出版
2022/11/10 出版
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The Tertiary Gravels of the Sierra Nevada of California

Ingram 出版
2022/11/10 出版

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.

9 特價1557
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International Mining Law

Ingram 出版
2022/11/10 出版

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.

9 特價1603
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Art of Coppersmithing

John,Fuller  著
Ingram 出版
2022/11/10 出版

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.

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A History of Coal Mining in Great Britain

Ingram 出版
2022/11/10 出版

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.

9 特價1053
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The Sampling and Assay of the Precious Metals

Ingram 出版
2022/11/10 出版

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.

9 特價1833
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International Mining Law

Ingram 出版
2022/11/10 出版

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.

9 特價1098
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Metal Spinning

C,Tuells  著
Ingram 出版
2022/11/10 出版
9 特價639
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A History of Coal Mining in Great Britain

Ingram 出版
2022/11/10 出版

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.

9 特價1557
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Art of Coppersmithing

John,Fuller  著
Ingram 出版
2022/11/10 出版
9 特價1098
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Gold Deposits of North Carolina

Ingram 出版
2022/11/10 出版
9 特價961
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The Australian Mine Ventilation Conference 2022

Ingram 出版
2022/10/16 出版

The Australian Mine Ventilation Conference 2022 is the opportunity to promote safe ventilation practices to improve the productivity and safety of mines. By sharing and disseminating the knowledge gained from operations in Australia and around the world we can assist in the provision of the raw materials needed. The message is still the same in that ventilation controls form many of the effective management of core risk activities in mines. The recognition of this has brought about the requirement of the position of Statutory Ventilation Officers in both coal and metalliferous mining sectors in Australia. Coupled with this is the re-emergence of pneumoconiosis in mine workers. These and other factors should provide the incentive for all underground operations to contribute strongly to this conference. Significant developments in practice and research in recent years have helped ensure we maintain and improve levels of safety within our underground mining sector. The organising committee has provided an opportunity to present these developments so that the industry can benefit from this collective knowledge and will call on expertise from industry, academia, researchers and regulators to bring about the 12th in a series of ventilation conferences. Topics covered in the 2022 program include explosions and air blasts, coal mine ventilation, main fans and refrigeration, hazard management and detection and control of spontaneous combustion.

9 特價3420
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The Sounds and Colors of Power

Mit Press 出版
2022/09/21 出版

A groundbreaking analysis of the relationship between culture and technology.This is a groundbreaking analysis of the relationship between culture and technology. Dorothy Hosler, an archaeologist, metallurgist, and anthropologist, shows how the methods of materials science, augmented by archaeological and other sources of data, can be used to illuminate historical puzzles such as the origins of the unique metallurgy developed in West Mexico between the seventh and sixteenth centuries. Hosler traces the roots of this technology to Central and South America and establishes that it was introduced to West Mexico in two separate waves, both traveling along a maritime trade route originating in Ecuador and extending as far south as central and southern Peru. She then shows how West Mexican smiths transformed the elements of the technology (including alloy systems, fabrication methods, and artifact designs) to reflect their own perceptions of what were for them late-appearing materials, in that they were introduced some time after the foundations of civilization had appeared in their land. The central question Hosler addresses is why West Mexicans chose not to exploit the utilitarian properties of metals but focused instead on what seem to us to be incidental properties of sound and color. Drawing on historical, ethnographic, and linguistic data, she argues that metallic sounding instruments, especially bells, were used in rituals that offered protection in war, that celebrated creation, fertility, and regeneration, and that figured in concepts of the sacred - rituals, in short, that created a universe through song, through the sound of bells, and through reflective golden and silvery colors. The focus on sound and color thus constituted an expression of divine power. Hosler argues further that the elites and rulers who wore and used these metal objects themselves embodied these supernatural qualities. A rich array of technical date, maps, and photomicrographs support Hosler's analysis.

9 特價3802
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Innovation in Tbm Traffic Tunnels

Ingram 出版
2022/09/13 出版

Innovation in TBM Traffic Tunnels is aimed at professionals involved in the planning, design, and construction of tunnels for transport infrastructure, including authorities, consultants and construction companies, worldwide.

9 特價6628
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Silver in the Sierra Madre

Ingram 出版
2022/08/26 出版

Dr. Peter Flawn, president-emeritus of the University of Texas, Austin, began life as a geologist. After a stint in World War II, he teamed up with another geologist, Philip W. Beckley, to explore and develop an old Spanish silver mine in a remote, mountainous area of the state of Durango, Mexico, known as the barancas. Beckley was a true soldier of fortune, flying in and out of the site with a small plane, the only way to reach the Santa Cruz mine. This personal memoir includes the decisions and actions of the Dougherty family of Beeville, Texas, the de facto owners of the mine properties, and others closely associated with the project both from Texas and Mexico. Beckley's tragic death, either by accident or by a bandit, eventually closed the project. Dr. Flawn retired after a career in university education and dedicated his memoirs to his old friend, describing their association from the period of 1966 to 1972. The author also provides a history of the Santa Cruz mine from 1908 until 1966, as told through reports and letters from a succession of mine managers.

9 特價1835
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A Treatise on the Metallury of Iron

Ingram 出版
2022/08/20 出版

A Treatise on the Metallury of Iron is an unchanged, high-quality reprint of the original edition of 1890. Hansebooks is editor of the literature on different topic areas such as research and science, travel and expeditions, cooking and nutrition, medicine, and other genres. As a publisher we focus on the preservation of historical literature. Many works of historical writers and scientists are available today as antiques only. Hansebooks newly publishes these books and contributes to the preservation of literature which has become rare and historical knowledge for the future.

9 特價2432
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Electron-Ion-Plasma Modification of a Hypoeutectoid Al-Si Alloy

Ingram 出版
2022/07/07 出版

This work details theoretical and experimental research and computer simulation of structural phase transformations in AlSi10Mn2Ni Silumin on different scale levels under electroexplosion alloying, electron beam processing and electron-plasma alloying at the nanolevel in order to create new materials.

9 特價5323
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Structure and Properties of Intermetallics in Pre-Transitional Low-Stability States

A I,Potekaev  著
Ingram 出版
2022/07/05 出版

This book is dedicated to the fundamental physical aspects of stability, the influence of structural defects on the properties and structural phase transformations of BCC alloys. The authors present patterns that occur in the structural-phase states of functional alloys with low stability or instability under thermal cycling effects. Structural-phase transformations and the physical laws governing the influence of the thermomechanical effect on the properties of alloys are examined to advance development of technological processes for processing functional materials. Features: Studies the correlation between structural phase states and changes in the physico-mechanical properties of intermetallic compounds Explores the influence of thermomechanical cycling on the properties of functional alloys Details low-stability pretransition states in alloys

9 特價5480
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Processing of Seismic Reflection Data Using MATLAB

Wail,Mousa  著
Springer 出版
2022/06/02 出版

This short book is for students, professors and professionals interested in signal processing of seismic data using MATLAB(TM). The step-by-step demo of the full reflection seismic data processing workflow using a complete real seismic data set places itself as a very useful feature of the book. This is especially true when students are performing their projects, and when professors and researchers are testing their new developed algorithms in MATLAB(TM) for processing seismic data. The book provides the basic seismic and signal processing theory required for each chapter and shows how to process the data from raw field records to a final image of the subsurface all using MATLAB(TM). The MATLAB(TM) codes and seismic data can be downloaded here. Table of Contents: Seismic Data Processing: A Quick Overview / Examination of A Real Seismic Data Set / Quality Control of Real Seismic Data / Seismic Noise Attenuation / Seismic Deconvolution / Carrying the Processing Forward / Static Corrections / Seismic Migration / Concluding Remarks

9 特價1982
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Socially Just Mining

Springer 出版
2022/06/02 出版

In this book we consider ways in which mining companies do and can/should respect the human rights of communities affected by mining operations. We examine what "can and should" means and to whom, in a variety of mostly Peruvian contexts, and how engineers engage in "normative" practices that may interfere with the communities' best interests. We hope to raise awareness of the complexity of issues at stake and begin the necessary process of critique--of self and of the industry in which an engineer chooses to work. This book aims to alert engineering students to the price paid not only by vulnerable communities but also by the natural environment when mining companies engage in irresponsible and, often, illegal mining practices. If mining is to be in our future, and if we are to have a future which is sustainable, engineering students must learn to mine and support mining, in new ways--ways which are fairer, more equitable, and cleaner than today.

9 特價3392
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The Gold Prospector's Field Guide

M J,Grover  著
Ingram 出版
2022/04/29 出版

Gold prospecting is a fun and profitable adventure! Prices for the precious metal have reached record highs in recent years, and interest has soared amongst people who want to go out into the hills and find some gold of their very own. You can still go out and successfully find gold even today if you know how and where to look.This book is going to teach you how to do it. We'll take a look at the early gold rushes across the United States and identify these historic mining areas that are most likely to produce gold for the modern-day gold prospector. Then from there we will learn how to do a deep-dive into research, locating the exact creeks, rivers, mountains and mines where gold is found. This book will discuss the important details of land ownership, mining claims, and the constantly changing regulations that we need to be aware of before heading out into the field. This necessary step will ensure that we have fun while also staying legal when we head out on our adventures. Once we know where to go, it's time to learn about the geology of gold deposits, and what it takes to mine them effectively. We'll look at the best and most efficient types of mining equipment ranging from the most basic gold pans to modern high-tech metal detectors. If you're willing to put in the effort, the end result will be gold in your poke! We'll learn the proper ways to process the gold, clean it up, and market it for sale to get the best price from your hard work.

9 特價682
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The Belt Conveyor

Ingram 出版
2022/04/02 出版

This book describes all parts of belt conveyors, their functions and different types presented one after the other with necessary illustrations covering all the basic aspects so that the reader can obtain an overall understanding of their operation and implementation within the field of bulk material handling and mining.

9 特價3600
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Cryptocurrency Mining 2022

Macao  著
Ingram 出版
2022/03/26 出版
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Extractive Metallurgy of Cobalt

Roger,Rumbu  著
Lulu.com 出版
2022/02/25 出版

This book is a compendium, a mine of information, experiences and relevant industry practices, a must have, a book to learn about one of the most influential strategic metal impacting the global economic scene. Roger RUMBU, Met. Eng. - University of Lubumbashi, PPM Certificate - University of Pretoria

9 特價2754
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Cryptocurrency Mining 2022

Macao  著
Ingram 出版
2022/02/25 出版
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Mining Technologies Innovative Development

Ingram 出版
2022/02/25 出版

The present book covers the main challenges, important for future prospects of subsoils extraction as a public effective and profitable business, as well as technologically advanced industry. In the near future, the mining industry must overcome the problems of structural changes in raw materials demand and raise the productivity up to the level of high-tech industries to maintain the profits. This means the formation of a comprehensive and integral response to such challenges as the need for innovative modernization of mining equipment and an increase in its reliability, the widespread introduction of Industry 4.0 technologies in the activities of mining enterprises, the transition to "green mining" and the improvement of labor safety and avoidance of man-made accidents. The answer to these challenges is impossible without involving a wide range of scientific community in the publication of research results and exchange of views and ideas. To solve the problem, this book combines the works of researchers from the world's leading centers of mining science on the development of mining machines and mechanical systems, surface and underground geotechnology, mineral processing, digital systems in mining, mine ventilation and labor protection, and geo-ecology. A special place among them is given to post-mining technologies research.

9 特價5236
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Introduction to Mining Business Projects - 2nd Edition

Roger,Rumbu  著
Ingram 出版
2022/02/23 出版

Mining operations are the key elements in this time of technical changes and development. Transport, housing, different infrastructures are requiring more and more mining resources. the release of a new smartphone or tablet, the top self-driven electrical, the rocket program are all felt in the womb of the earth somewhere in all continents and very soon in the moon. Even a new secured banking note or a pacemaker have their roots in the mines. Mining resources have not been all evaluated, many are estimated explaining why since the man as started digging, many resources are still available leading more and more people investing in mining operations to fill the needs of this world in perpetual development. This introduction to Mining Business Projects is a tool, a must have to help potential junior miners to make the right path in the ventures of mining operations. Mining operation is a tremendous story to share, please go for it. Roger Rumbu, Met. Eng., PPM, TBOM.

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Physical Metallurgy

Ingram 出版
2022/01/27 出版

This compact overview on physical metallurgy provides a detailed coverage of phase equilibria and phase transformations in metals and alloys. It presents the broad range of topics from processes of crystallization and diffusion mechanisms to plastic deformations, recrystallization and phase transformations. It presents the microstructures in various alloys, especially in iron alloys and steels. As an introductory work it is valuable to Material Scientists, Students and Engineers.

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The Anthropology of Resource Extraction

Routledge 出版
2022/01/15 出版

This book offers an overview of the key debates in the burgeoning anthropological literature on resource extraction.

9 特價2870
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Rapidly Quenched Metals

Mit Press 出版
2021/12/30 出版

Rapidly quenched metals are the subject of an increasing research effort, spurred on both by advancements in metal processing techniques that have made commercial utilization of these metals feasible and by the recent discoveries of unique and potentially useful properties of these materials. Among the processes that have been perfected is splat cooling, in which a liquid metal is cooled by being spread as a thin film against a metal substrate. Other processes involve vacuum evaporation, sputtering, and chemical deposition. Such processes are considered in this book, but its main emphasis is on the remarkable physical, mechanical, chemical, magnetic, electronic, and other properties of rapidly quenched metals.

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Miners' Circular 46

Anonymous  著
Ingram 出版
2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Mining Operations in the Province of Quebec for the Year 1906 [microform]

2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Fourteenth Biennial Report of the State Coal Mine Inspector 1909-1910

Ingram 出版
2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Preliminary Report on Mining Location No. 1 K, Lake of the Woods [microform]

Ingram 出版
2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Prospectus of the New Brunswick Anthracite Coal Mining Company [microform]

2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Anthracite Division 1958 Annual Report; 1

2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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The Hydrometallurgy of Copper, and Its Separation From the Precious Metals [microform]

Ingram 出版
2021/12/17 出版

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Annual Report - Dept. of Mines and Mining; 1896/1897

2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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Elements of Structural Metallurgy

Ingram 出版
2021/12/17 出版

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. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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