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 57
THE ART OF PROJECTING. 42 merits of a horizontal galvanometer needle, etc., such as cannot be exhibited with the common forms of ap¬ paratus for projections. At first the awkward method was adopted of turning the lantern up so that it rested upon its back. This endangered the condensing lenses of… … this, and have a most valuable attachment to the lantern. v/ The cutjfo. 25) represents this invention. It con¬ sists of aAdine mirror inclined at an angle of 450, and whevy so^laced that the beam of light from the lantern fallsNa^on it, it is reflected perpendicularly upwards tpon a lens that…
Light · Magic Lantern
Internet Archive · Public domain (published before 1931). Free to use for anything.
