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Excerpt from On Pyrite and Marcasite Sir: The subject of the secondary enrichment of ore bodies is one of the most important in chemical geology, and probably also one of the most complex, because nothing like chemical homogeneity is to be an tieipat'ed at or beneath the croppings of ore deposits. A long time must elapse before the processes involved are fairly clear. The memoir by D1. II. N. Stokes Which I transmit herewith, for publication in the Bulletin series, is 2111 important contribution to this subject, describing a method for the quantitative determination of pyrite and mareasite When in mixture, and discussing some of the relations of these most abundant sulphides to those of copper. This memoir represents only a portion of Dr. Stokes's work in this field, and it is to be expected that other papers will follow as soon as practicable. 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.
This book delves into the science and history behind pyrite and marcasite, two minerals often confused with each other. Stokes, an expert in mineralogy, explores the properties, uses, and cultural significance of these minerals throughout history. With detailed illustrations and photographs, this book is a must-read for anyone interested in geology, chemistry, or cultural history. 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.
This reference encompasses the fields of Geomagnetism and Paleomagnetism in a single volume. Both sciences have applications in navigation, in the search for minerals and hydrocarbons, in dating rock sequences, and in unraveling past geologic movements such as plate motions they have contributed to a better understanding of the Earth. The book describes in fine detail the current state of knowledge and provides an up-to-date synthesis of the most basic concepts. It is an indispensable working tool not only for geophysicists and geophysics students but also for geologists, physicists, atmospheric and environmental scientists, and engineers.
This volume gathers and presents a massive collection of data on the location, quality and accessibility of uranium resources in nearly every region of the globe. This exhaustive, up-to-date reference is designed for practical use and arranged by four geographic regions: Asia, USA and Latin America, Europe, and Australia-Oceania and Africa.
Since Mendeleev outlined the modern periodic table in 1869, many new uses have been found for the 92 naturally occurring elements. This book travels back in time to describe the utilization of materials familiar (gold, copper, iron) and arcane (arsenic, boron, red ochre) and their practical history (mining, metallurgy and crafts), with evidence from archaeology and geology. Together with the technological developments, author Robert Boyle portrays the advances in our understanding of materials science which led to modern geological and environmental sciences. It is a source book valuable to students of history and archaeology, mining and metallurgy, as well as to geologists, mineralogists and geochemists everywhere.
Vintage style is now--and with its rich colors and classic designs, timeless romanticism and old-world elegance, it’s the look that every jewelry maker and wearer craves. These 50 eye-catching and wide-ranging beaded projects show exactly why, from dangling cloisonn� beads on a rich, velvet ribbon choker to glittering blue and green crystals paired with silver filigree in a stunning necklace-and-earring combo. Even those who have never strung a bead or looped a wire before can make these in no time, thanks to the authors’ easy-to-follow guidance and clever ideas for giving old pieces a chic makeover. Helpful tips, variations, and historical tidbits are scattered throughout, providing additional insight.