01 v. t. To increase the power of (a single-cylinder beam engine) by adding a small high-pressure cylinder with a piston acting on the beam between …
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To increase the power of (a single-cylinder beam engine) by adding a small high-pressure cylinder with a piston acting on the beam between the center and the flywheel end, using high-pressure steam and working as a compound engine, -- a plan introduced by M'Naught, a Scottish engineer, in 1845.(Steam Engines)