Popular Lectures on the Steam Engine: In which Its Construction and Operation are Familiarly Explained; with an Historical Sketch of Its Invention and Progressive Improvement

Etukansi
J. Taylor, 1830 - 164 sivua
 

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Sivu 25 - I have seen the water run like a constant fountain stream forty feet high ; one vessel of water rarefied by fire driveth up forty of cold water. And a man that tends the work is but to turn two cocks, that one vessel of water being consumed, another begins to force and re-fill with cold water, and so successively, the fire being tended and kept constant, which the self-same person may likewise abundantly perform in the interim between the necessity of turning the said cocks.
Sivu 25 - ... stopping and screwing up the broken end, as also the touch-hole ; and making a constant fire under it, within twenty-four hours it burst and made a great crack : so that having a way to make my vessels, so that they are strengthened by the force within them, and the one to fill after the other.
Sivu 157 - She had the most terrific appearance from other vessels which were navigating the river when she was making her passage. The first steamboats...
Sivu 142 - The upper end of the piston-rod is furnished with a cross-bar, which is placed in a direction at right angles to the length of the boiler, and also to the piston-rod.
Sivu 158 - This uncommon light first attracted the attention of the crews of other vessels. Notwithstanding the wind and tide were adverse to its approach, they saw with astonishment that it was rapidly coming towards them; and when it came so near...
Sivu 143 - ... the spring with a force equal to the excess of the pressure of the steam above that of the atmosphere. When, on the other hand, a vacuum is produced in the cylinder by the condensation of the steam, the same vacuum will be produced under the piston in the indicator, and the piston will be forced downwards by the excess of the pressure of the atmosphere above that of the uncondensed vapour in the cylinder.
Sivu 158 - ... in some instances shrunk beneath their decks from the terrific sight, and left their vessels to go on shore, while others prostrated themselves, and besought Providence to protect them from the approaches of the horrible monster, which was marching on the tides and lighting its path by the fires which it vomited.
Sivu 75 - Watt; his new colleague was a man of affluence and of great personal influence, "and to a most generous and ardent mind, he added an uncommon spirit for undertaking what was great and difficult. Mr. Watt was studious and reserved, keeping aloof from the world; while Mr. Bolton was a man of address, delighting in society, active, and mixing with people of all ranks with great freedom, and without ceremony. Had Mr. Watt searched all Europe, he could not have found another person so fitted to bring...

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