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 104
82 THE BOOK OF THE LANTERN. pattern of very compact form is illustrated at fig. 34. In this case the by-passes are governed by taps which are adjusted by the operator with a screw-driver. This seems to be a good arrangement, as there is no chance of accidental turning off or on by a careless touch,… … Fig. 34. There are one or two methods of manufacturing oxygen gas for the limelight as fast as it is used, and although, for reasons which I shall presently give, I cannot recom- mend such a procedure, the methods are ingenious enough to warrant notice. In Chadwick's apparatus there is an iron…
Lantern projection
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