Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 173
eated by convection of gases. The air near the stove is heated and Fig-192. rises to the top of the room, while cold air takes its place. Thus a series of currents is set up, warming the room. The same principle is applied in hot air furnaces. Thecold air is admitted to the furnace in the cellar… … Section III.—Radiation. 589. Heat can also travel through an intervening me-dium to an object beyond, without raising the temperatureof that medium. This is Radiation. Thus, a person stand-ing in front of a fire feels the heat of the fire. But if ascreen be placed between him and the fire, he no…
Physics
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