Historical and descriptive anecdotes of steam-engines, and of their inventors and improvers Volume 1 - Brossura
Sinossi
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: ...Hautefeuille's, and Papin's experience to these; for his machine certainly embodies nearly all their ideas. Hero, Porta, and Decaus mention the condensation of steam by the cold from the air, and the means of replenishing the vacuum by the pressure of the atmosphere; Porta and Decaus raised water through a pipe by the elasticity of steam pressing upon its surface. Hautefeuille and Papin describe similar contrivances, and the latter, particularly, made wonderful strides in improvement on his predecessors. Yet, how prodigious the difference between the most refined of these and the celebrated machine of Savery! How many essential parts were to be supplied from the stores of his own comprehensive and fertile imagination! How many difficulties were to be overcome! And how many original and masterly connecting ideas may not be traced in the imperishable monument of his genius, his " engine for raising water by fire." Among these may be named, raising the steam in a boiler, conducting it into a separate vessel; condensing it there by artificial means, and with instantaneous rapidity; making the production of the vacuum from an auxiliary become a principal cause of its wonderful effects; producing a continuity in its action by the arrangement of the parts of his machine; in aid of this latter purpose, replenishing his larger boiler with water, without lowering the temperature of that which it already contained; the use of small pipes to know when it was necessary to introduce the supply of water; the fine mechanism of the sliding valves'; the ingenious'construction of the coldwater pipe; the precision with which all the parts were adjusted to aid in the action of each other; and though last in the enumeration, not least in merit, his admirable arrangemen...
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