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| | Chapter2 text |
 | | The nature of a vacuum was known, and the method of obtaining it by the displacement of the air by steam, and by the condensation of the vapor, was understood. |
 | | The importance of utilizing the power of steam, and the application of condensation in the removal of atmospheric pressure, was not only recognized, but had been actually and successfully attempted by Morland, Papin, and Savery. |
 | | Steam passes from it through the cock, cl, and up into the cylinder, a, equilibrating the pressure of the atmosphere, and allowing the heavy pumprod, k, to fall, and, by the greater weight acting through the beam, i, to raise the piston, s, to the position shown. |
| www.history.rochester.edu /steam/thurston/1878/Chapter2.html (6077 words) |
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