The optical lantern, for instruction and amusement (1890)
Pringle, Andrew · New York, The Scovill & Adams Company · leaf 89
79 THE OPTICAL LANTERN. lanterns can be separated very easily, and each lantern is a very good and compact instrument in itself. … Fig. 44a. The front carrying the lens can be entirely removed ; so also can the support with springs intended to carry the slide- carrier, when one is used. The condenser is 4^ inches diam- eter, and a good parallel beam can be projected by suitable manipulation of the lime jet. Altogether, this is…
Lantern projection
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
