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 78
darkened until the jet be readjusted, which cannot be easily done without opening the door of the lantern and letting out a flood of light in the darkened room. There is, besides, much trouble in getting the jet central, which could easily be avoided by a more rational arrangement. Mr. Pumphrey, of… … Fig. 24. adds extra weight to the lantern. There is no doubt, at the same time, of its effectiveness and conveni-
Lantern projection
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-277-203.webp)
