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 84
62 THE BOOK OF THE LANTERN. having them constructed, and as they answer their purpose most perfectly, I will describe them. They are what are called skeleton-boards ; that is to say, they consist of frames filled in with sail-cloth. This mode of construction saves a great amount of weight. The… … Fig. 28. Fig. 27. hinged shelves, between which the weights are placed. These shelves are made of hard wood, so that they will not readily break. The lower frame (fig. 28) has let into it a smaller frame, which, when the boards are not in use, is bolted into the main frame for travelling. But when…
Lantern projection
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
