Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 432
Fig. 401 414 OnlHeat [420- units of surface, and as the quantity of heat emitted is the same, each unitmust receive one-fourth the quantity. To demonstrate the same law experimentally, a narrow tin-plate box istaken (fig. 402), filled with hot water, and coated on one side with lampblack.The… … black paper to absorb any radiation that falls upon it, is placed so that itsface is at a certain definite distance, co, say 9 inches, from this box, and thecover having been lowered, the needle of the galvanometer is observed to bedeflected through 80° for example.
Physics
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