Download PDF, EPUB, Kindle Library of Useful Knowledge Volume 1; Natural Philosophy
Download PDF, EPUB, Kindle Library of Useful Knowledge Volume 1; Natural Philosophy

Library of Useful Knowledge Volume 1; Natural Philosophy by Society For the Knowledge
Library of Useful Knowledge Volume 1; Natural Philosophy
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Author: Society For the Knowledge
Number of Pages: 304 pages
Published Date: 01 May 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781232159704
File size: 16 Mb
Download Link: Library of Useful Knowledge Volume 1; Natural Philosophy
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1829 Excerpt: ...remains uniform. (44.) To compute the actual force necessary to work a pump, (exclusive of the pump-rods, ) therefore, let the height of the discharging spout S, above the level C of the water in the well, be expressed in feet, and let the number which expresses it be h. Let half the diameter of the piston, expressed in parts of a foot, be r; the section of the piston, expressed in parts of a square foot, will then be r x r x 3.14. (note, p. 4.) If this be multiplied by the number of feet h in the height, we shall obtain the number of cubic feet of water which it is necessary to lift at each stroke. This is h x r x r x 3.14. Each cubic foot of water weighs about 1000 oz. av., or 624 lbs.; this, multiplied by hx.rx.ry. 3.14, will give, in pounds av., the force required at each stroke to lift the piston. The quantity of water discharged at each stroke, is equal to a column of wa ter, whose base is the section of the piston, and whose altitude is the length of the stroke. This quantity may, therefore, be found in cubic feet, by multiplying r x r x 3.14 by the number of feet in the length of the stroke. The weight of the water discharged may be ascertained in pounds avoirdupois, by multiplying this by 62J, and the number of imperial gallons by dividing the number of pounds by 10. II. The Lifling-Pump (45.) This pump also consists of an hollow cylinder A B (Jig. 24.) immersed in the reservoir from - 24 - which the water is to be raised. A valve opening up-wards is fixed in this cylinder at V, a little below the level Lof the water in the reservoir. A piston P, having also a valve opening up-wards, is moved in this cylinder by a frame FFFF, con-nected with the end of the piston-rod PH. At the top of-the cylinder is a spout S to discharge r the wat...

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