Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 61
transparent bisulphideof carbon, you notice how much higher the beam isthrown, and how much richer is the display of colour.3 30 ON LIGHT. LECT To augment the size of our spectrum we here employ(at L) a slit, instead of a circular aperture.* The synthesis of white light may be effected inthree… … diaphragm (not shown in the figure), with a longitu-dinal slit, through which the beam passes into the prism. * The low dispersive power of water masks, as Helmholtz has re-marked, the imperfect achromatism of the eye. With the naked eye Ican see a distant blue disk sharply defined, but not a red…
Light
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
