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Once a Week Volume 1 download

Once a Week Volume 1 download

Once a Week Volume 1. Eneas Sweetland Dallas

Once a Week Volume 1
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Author: Eneas Sweetland Dallas
Number of Pages: 572 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: PDF
ISBN: 9781130782059
File Name: Once.a.Week.Volume.1.pdf
Download Link: Once a Week Volume 1
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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. 1866 Excerpt: ...not be employed more economically. At some mines the consumption of fuel was enormous. Tho two engines at Wheal Rose and Wheal Busy, with cylinders of sixty-six and soventy-two inches in diameter, consumed thirteon tons of coal each per day. If theso mines had been situated in a coal-producing neighbourhood, this item would not have signified, but Cornwall was a long way from this mineral; the roads to the mines were mountainous and horrible; we may, therefore, guess at the expense of conveying coals to them. It was, upon this question of tho loss of heat, caused by the condensing of cold water inside the cylinder, that Newcomen's engine ultimately broke down, and prepared the way for the new actor upon the scene, who was destined to remake the engine, and convert it once for all into the great moving power for ages. It so happened that, just at the very time in which the mine-owners of Cornwall were on the point of being drowned out in consequence of the inadequacy of their engines to "fork" the water from the depths of thoir pits, the mind of an intelligent mathematicalinstrument maker, then residing within the shadow of the College of Glasgow, appeared to be directed to the new motive power by the merest accident. He was well-known to some of the professors, and being of a philosophical turn of mind, appears to have been in some sense connected with the University; at all events, the Professor of the Natural Philosophy class, knowing that he had paid some attention to the subject of steam, entrusted to him a model of a Newcomen engine to repair. Tho model had, indeed, been sent to London for this purpose, and if it had remained there, in all probability it would have been returned without dropping that fruitful seed into the mind of the workmen...

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