ved a Rumford long end. twice as medal from the Ameri- wide as the steam can Academy of Sci- ports, and therefore ences in consideration back pressure on the of the merit of his in- piston of the engine is vention. avoided. ‘The rapid The engine was ex- opening anc. slow lap- hibited for… … valves ; no complica- ment is attended with tion of gearing being the least. possible fric- used for that purpose. of the cylinder of the engine, and therefore has no long tion, and the stop presents absolutely no resistance te the passages there to fill with live steam. governor, except at the…
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