Sauzay, A. (Alexandre), 1804-1870 · London, S. Low, son, and Marston · leaf 242
s looked at. Achromatism is obtained by combining, according to certain rules, two sorts of glasses, one of crown glass the other of flint glass, united or glued together.! There are several means of decomposing the Fig. 46. solar spectrum and restoring the white colour to light. We will confine… … Fig. 47. — RECOMPOSITION OF LIGHT. by receiving the spectral line on a biconvex lens, behind which is placed a small screen of pasteboard, which receives all the rays as white. The third method consists in receiving on seven small glass mirrors, with their faces quite parallel, the seven colours of…
Glass manufacture · Glassware
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
