Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 169
orby animals, or not done at all. In this way the human racehas been freed from heavy drudgery, and the energy thus savedis devoted to higher forms of work. Steam engines are called heat engines because in them heatis turned into work. Another form of heat engine is the gas orgasoline engine. Let… … FIG. 100. — The boiler and steam engine. from the boiler through the steam pipe P, and into the steamchest S, of the engine. From here it passes first into one endof the cylinder and then into the other. It is in the cylinder Cthat heat is turned into work. The live steam from the boiler SOURCES OF…
Physics · Home Economics
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