The roads and railroads, vehicles, and modes of travelling, of ancient and modern countries; with accounts of bridges, tunnels, and canals, in various parts of the world .. (1839)
London : J.W. Parker · leaf 299
to thesingle-acting engine in which the piston is acted on duringits down-stroke only; it being returned to the top by acounterweight at the other end of the beam. To under-stand the general mechanism of this engine, let us firstimagine an engine like the high-pressure engine alreadydescribed,… … This vessel, as well as the rest of the apparatus aboutto be described, is kept cold by immersion in the cisternof cold water cc, which is kept always full by a pump(not shown in the figure) worked by the engine itself.During the down-stroke of the piston, the steam below itis forced into the…
Roads · Railroads · Bridges · Vehicles
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