Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 851
at engines, described by Weisbach. The average speed of the engine is 140 feet per minute, or 7double strokes per minute. This requires a velocity of something less than 2^ feet per second of thewater in the pressure-pipes ; and as all the valve apertures are large, the hydraulic resistances must…
Mechanical engineering
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