The book of the lantern : being a practical guide to the working of the optical (or magic) lantern : with full and precise directions for making and coloring lantern pictures (1889)
Hepworth, Thomas Cradock, -1905 · New York : E.L. Wilson · leaf 212
190 THE BOOK OP THE LANTERN. range matters in a very simple manner. Let the lantern stand on a base board, and let the objective be supported upon a sliding piece in front of that board. Cut away the tin nozzle upon which the objective fits in the ordinary way, so that any object can easily be… … Fig. 50. Here we have a base board AA, with a fixed support in the centre B, which is pierced with a hole sufficiently large to contain the condensers of the lantern. Close up to this is placed the lamp L. Another support, C, holds the objec- tive, and this support by means of a sliding piece let…
Lantern projection
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