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Excerpt from Gold From the Quartz I. The continent of Africa is larger than China, India, Europe, and the United States. (see also end paper.) 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.
Excerpt from On the Milling of Gold Quartz Dear sir My last paper to the State Geological Society on The Milling of Gold Quartz, wherein I tried to describe the process of simple amalgamation of the raw pyritic matter in wooden barrels, appears from the great number of letters that I have received respecting it, after its publication in the Mining and Scientific Press, to have attracted considerable attention, and has, therefore, encouraged me to resume the subject, but this time as a contribution to the State Mining Bureau; you having kindly offered to allow the specimens accompanying this paper, and intended to illustrate whati have stated, to remain for a short time at the rooms of the Mining Bureau, to give those who feel interested in the mat ter a chance of examining them. You have also promised to put some very important and interesting specimens from your private collection with them. I can only now repeat what I have stated on a former occasion, that at the present time I think scarcely anything can be of greater importance to the mining interests of this State, than a simple and cheap mode of extracting the gold from low grade veinstone, and the determination Of the true condition of the ores associated with it. 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.
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Excerpt from The Gold-Quartz Veins of Nevada City and Grass Valley Districts, California Plate I. General map showing location of the special sheets II. Contour map of the Neocene bed-rock surface III. Sheeted zone in granodiorite, Main sheet, Grass Valley IV. Thin sections showing structure of ore V. Thin sections showing structure of ore VI. Thin sections showing structure of ore VII. Specimens showing structure of ore VIII. Specimens showing structure of ore IX. Specimen from Merrifield vein showing structure of ore. X. Specimen from Merrifield vein showing structure of ore XI. Maryland vein on the -foot level. XII. Maryland vein, stopes above -foot level XIII. North Star vein, near -foot level XIV. North Star vein, near -foot level XV. Ophir Hill vein, Empire mine, near -t'oot level XVI. Bunker Hill vein, Amador County, Cal XVII. Ore shoots of Nevada City and Grass Valley mines XVIII. Ore shoots of Nevada City and Grass Valley mines XIX. View of Sugar Loaf and Cement Hill from Nevada City XX. View of Champion and Home mines from Providence mine, looking down Deer Creek. 210 XXI. Horizontal projection and sections of underground works of the Providence and adjoining mines. 212 XXII. Map of the new Rocky Bar quartz mine. 238 XXIII. Map of underground works of North Star mine 240 XXIV. Special map of Nevada City and Grass Valley mining districts. In pocket. Fig. 1. Section at tunnel 900 feet below Home mine 63 2. Primary pyrrhotite in augite. 67 3. Intergrowth of primary pyrite, pyrrhotite, and ilmenite 70 4. Section of superjacent formations at Manzanita mine.. 98 5. Bluff at hydraulic cut, near city reservoir, Nevada City 99 6. Section of breast of workings, \vest Harmony drift mine 100 7. Vertical section along \vest Harmony incline 100 8. Vertical section along Yosemite incline. 101 9. Section in workings of Odin drift mine. 101 10. Sheeted zone in granodiorite, Deer Creek. Bellefountain mine. 185 11. Vertical section along shaft, Federal Loan veiu 187 12. Vertical section along shaft, Never Sweat vein 189 Vertical section showing faults on the Beckman vein, May ower mine 195 14. Horizontal projection showing faults on the Floyd vein, May ower mine 15. Vertical section along shaft, Canada Hill vein 196 16. Horizontal projection showing faults on the Canada Hill vein 197 17. \voodville vein, North Banner mine, in drift 198 18. Vertical section along shaft. Pittsburg vein 202. 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."
Excerpt from Gold Deposits of North Carolina Results of more recent petrographic studies The slates and schists The monr-oe slates Quartz rocks - The volcanic series Conclusions. The genesis Of the gold ores. 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.
Excerpt from Twelve Years in the Mines of California: Embracing a General View of the Gold Region, With Practical Observations on Hill, Placer, and Quartz Diggings; And Notes on the Origin of Gold Deposits We take pleasure in recommending our esteemed friend and fellow-townsman, L. B. Patterson, to any community in which circumstances may place him. 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.
Excerpt from Gold Mining Districts, With Plans and Sections Hence we need not be surprised at: finding alannlanco ot' globules of mercury in the tailings of some of our mills when we witness the mode of introducing mercury. Assuming that the average yield of gold in auv parcel of quartz is one ounce to the ten, and that in a battery containing live stampers, live tons of ore are crushed in twenty-four hours, the total quan tity of mercury which should be added according to the lore going directions is six ounces, allowing one ounce and one fifth per ton. This quantity should be distributed at the rate of one quarter of an ounce per hour, or about one-twelfth of a tea spoon at a time. 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.