Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 304
direction, gradually decreasing to zero at aboutmid-stroke, after which they change direction and again becomea maximum in the upward direction at the top of the stroke. The gradual way in which these changes take place is shown bythe smoothness of the contour of the curve. BALANCING THE ENGINE.…
Steam-engines
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