Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 174
ensity. The intensity of radiantheat is best measured by the Ther-mo-electric pile.J The instrumentis arranged as in Fig. 193. A tinbox with blackened sides, is placedin front of the open cone attachedto the instrument, and water at10°, 20°, etc., is placed in the box.The deflection of the… … *See Sec. 80, page 22. tThis is confined to media of uniform density If the density varies, re-fraction takes place according to the laws developed under Light, Sec. 083.tFor its construction and use, see Electricity. THEOKY OP EXCHANGES. 165 the cone attached, is placed in front, and removed to…
Physics
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