Excerpt from Tin: Describing the Chief Methods of Mining, Dressing, and Smelting It Abroad; With Notes Upon Arsenic, Bismuth, and Wolfram Near the former place, which has given its name to the entire district, the mineral (cassiterite) occurs in deposits of two distinct sorts; in the one case impregnated through a mass of rock (locally known as zwitter) that measures about 1312 feet across its outcrop in the other, associated with hematite, quartz, and other gangue, in a number of small but regular fissures, averaging ...
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Excerpt from Tin: Describing the Chief Methods of Mining, Dressing, and Smelting It Abroad; With Notes Upon Arsenic, Bismuth, and Wolfram Near the former place, which has given its name to the entire district, the mineral (cassiterite) occurs in deposits of two distinct sorts; in the one case impregnated through a mass of rock (locally known as zwitter) that measures about 1312 feet across its outcrop in the other, associated with hematite, quartz, and other gangue, in a number of small but regular fissures, averaging rarely more than 8 inches in width. These latter form a complete network of veins through the same formation of zwitter alluded to, which is enriched wherever they traverse it, although the veins themselves now hold but a comparatively small amount of tin. On passing into the adjoining porphyritic granite, most of them, however, appear to become richer, and are frequently found with a parting of red clay; whilst, on the other hand, they cease to be productive, where they enter the next adjacent eruptive masses of quartz-porphyry and syenite-porphyry, which so imperceptibly merge into one another, that no distinct line of demarcation can be traced between them. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... 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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Publisher:
British Library, Historical Print Editions
Published:
3/24/2011 12: 00: 00 AM
Language:
English
Alibris ID:
17841830224
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Standard Shipping: $4.71
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Publisher:
British Library, Historical Print Editions
Published:
3/24/2011 12: 00: 00 AM
Language:
English
Alibris ID:
17918175141
Shipping Options:
Standard Shipping: $4.71
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
