File:Transactions (1871) (14759009706).jpg

Identifier: transactionsmining07amer (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:
1 J 430 AN IMPROVED SYSTEM OF CORNISH PITWORK. Fig. 5. /Section CD, Section A.B,
Text Appearing After Image:
... SCALE OF FEET 0 12 3 4 5 6 SCALE OF METRES AN IMPROVED SYSTEM OF CORNISH PITWORK. 431 two pipes, tliiKs tillowing; any kind of valve to be used for an uppervalve. To the ri^jht-liand arm of the nozzle is attached a wrought-iron return-jjipe, the open lower end of which di()s into the tank 0.This tank O is really no part of the pumj), but a part of the reser-voir R, and is in open coinnuuiication with it by means of the pipeP, the object of the arrangement being to discharge the water fn^mthe lower pijic without the loss of head which would occur if thewater were allowed to pour out of the nozzle and fall freely into thereservoir R. Across the nozzle at X and separating the lower andright-hand portion of the same from the upper and left-hand part,is a flange X, which may be either cast in the nozzle or made sep-arately and bolted to its place. The lowest pump is like that described in Fig. 1, except that thevalve is a circular disk valve. The following are some of the principal dim

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