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" ... applied, with a piston fitting it, so as to have very little friction, and to the rod of this was applied a lever, constructed to work on edges like those of a scale-beam, by which the resistance against the elastic force of the steam could be accurately... "
The steam engine theoretically and practically displayed, by G. Birkbeck and ... - Page 38
by George Birkbeck - 1827
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A System of Mechanical Philosophy, Volume 2

John Robison - Astronomy - 1822 - 766 pages
...the elastic force of the steam could be accurately determined ; and at your suggestion, to be assured that no inaccuracy had crept into the calculation,...lever was ascertained, an actual column of mercury of SO inches high was substituted, and the correspondence was found to be within ,;,,-,• of an inch....
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On the Nature, Properties, and Applications of Steam, and on Steam ...

John Scott Russell - Locomotives - 1841 - 400 pages
...the elastic force of the steam could be accurately determined ; and at your suggestion, to be assured that no inaccuracy had crept into the calculation...substituted, and the correspondence was found to be within foTJ °f an ™ cu " The observations at each of the points of pressure noted were continued some minutes,...
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The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science

English periodicals - 1847 - 566 pages
...the elastic force of the steam could be accurately determined; and at your suggestion, to be assured that no inaccuracy had crept into the calculation,...substituted, and the correspondence was found to be within -j-^u of an inch. The observations at each of the points of pressure noted were continued some minutes,...
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