The art of projecting. A manual of experimentation in physics, chemistry, and natural history with the porte lumiere and magic lantern. (1892)
Dolbear, A. E. · Lee and Shepard · leaf 126
may often find colored stars or rings or other fanciful designs on posters for advertisements or wrap¬ pings on goods of various sorts, which may be utilized with the rotator in studying color. Fraunhofer’s lines. The solar spectrum as usually projected with around orifice and common prism, with an… … prism in th€ £W1 beam from the forte lumiere and turn it so that ^frpside is very nearly parallel with the beam. A sp^krapi will be formed containing a number of darl^^rpendicular lines known as the C D E F and These may be still more marked by placing
Light · Magic Lantern
Internet Archive · Public domain (published before 1931). Free to use for anything.
