The Sciopticon manual : explaining lantern projections in general, and the Sciopticon apparatus in particular, including magic lantern attachments, experiments, novelties, colored and photo-transparencies, mechanical movements, etc. (1877)
Marcy, L. J. (Lorenzo J.) · Philadelphia : J.A. Moore · leaf 187
178 SOIOPTTCON MANUAL. EDGERTOJV'S SEEF-CONDENSING GAS CYLINDERS. " Special attention is asked to these cylinders, affording as they do a more easy and safe means of producing and condensing the gases for stereopticon purposes and gen- eral illumination. To the traveling exhibitor they fur- … Fiff. 48. nish a compact means of transporting his gases, and save the labor and vexation of carrying weights, pres- sure-boards, etc.; while to the teacher they are invalu- able, placing at his command, at all times, a powerful light as readily started and as easily managed as that of a coal-oil…
Lantern projection · Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
