Six lectures on light : delivered in America in 1872-1878 (1886)
Tyndall, John, 1820-1893 · New York : D. Appleton · leaf 60
8)—in ACHEOMATISM, DOLLOND. 29 opposition to a wedge of glass (to the right of B), thispoint can be illustrated before you. We have firstof all the position (dotted) of the unrefracted beammarked upon the screen ; then we produce the narrowwater-spectrum (W); finally, by introducing a flint-glass… … This is the place to illustrate another point bearingupon the instrumental means employed in these lec-tures. Bodies differ widely from each other as to theirpowers of refraction and dispersion. Note the positionof the water-spectrum upon the screen. Alteriug inno particular the wedge-shaped…
Light
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from One thousand processes in manufactures and experiments in chemistry / [Colin Mackenzie]. (1825)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b29307867-135-1.webp)
