File:Transactions (1871) (14741886866).jpg

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Identifier: transactionsmining41amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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Text Appearing Before Image:
closed. Curtain at N. closed. Curtain at N. closed. Curtain at N. open. Air from old stopes. Air from old stopes. Air from Union shaft. Air from Union shaft. Curtain closed at N.Curtain open at N.Curtain closed at N.Curtain open at N.Air-pipe in partition.Curtain removed.Air going to I. 20-in. pipe.20-in. pipe.20-in. pipe. east drift; the remainder, amounting to 14,521 cu. ft. per min.,passes into the drift until it reaches a stope, where two fans pickit up, one forcing the air past the stope into the ConsolidatedVirginia workings, the other forcing the remaining air downthrough the Ophir winze to the 2,200-ft. level of the Ophirmine. The Consolidated Virginia fan Q^o. 3) takes 3,323 cu,ft. per min., while the Ophir fan (No. 2) takes 11,566 cu. ft, permin. Beyond the stope another fan (No. 1) takes air from theOphir-winze station and forces it on to the stopes north of theOphir winze. This air rises up through the stopes and event- VENTILATING-SYSTEM AT THE COMSTOCK MINES, NEVADA. 19
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20 VENTILATING-SYSTEM AT THE COMSTOCK MINES, NEVADA.

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Author American Institute of Mining, Metallurgical, and Petroleum Engineers
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28 July 2014



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