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 106
LIGHT 91 CONCAVE MIRRORS. Fig. 67. Concave mirrors, sufficiently good for demonstration, are fitted to wall lamps, or the reflector generally fitted to oil lanterns may be used. Such a one held in the path of the beam from the porte lumiere will reflect the rays to a focus, where there will be… … The image form^dMn front of the concave mirror may be seen 1^ letting a strong light fall upon the object and havmg the mirror above it, as indicated. If the object o be inverted and hidden otherwise from view, appear upright ; and at o\ to one standing in front of the mirror, all in a room can be…
Light · Magic Lantern
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