Science: Hot-Water Engine

By surrounding two cylinders with high pressure boilers, by filling the boiler coils with water and then sealing them hermetically, Engineer J. F. J. Malone of Newcastle-on-Tyne, England has made an effective heat engine. Last week he demonstrated it.

A furnace heats the base of one boiler-cylinder to 900° F. (688° above water's boiling point). The superheated water expands (but cannot change to steam because it is too closely confined) and pushes a piston at the far end of this cylinder. Cold water or air, applied against the piston end of the boiler, cools...

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