Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 215
igator of consummateability, who sagaciously turned to account his own dis-covery, that the obscure rays of luminous sources arein part transmitted by black glass. Intercepting by aplate of this glass the light from an oil flame, andoperating upon the transmitted invisible heat, heobtained effects… … enables us to pursue this identity question to its utmostpractical limits. Mounting our two Nicols (B and C, fig. 54) in frontof the electric lamp, with their principal sectionscrossed, no light reaches the screen. Placing purthermo-electric pile (D) behind the prisms, with itsface turned towards…
Light
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
