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 209
2C0 SCIOPTICON MANUAL. sections of quartz, cut in different relation to the axis of the crystal, producing most splendid tints; unan- nealed glass, quill, Iceland spar, and, indeed, almost any matter the particles of which are in a state of I tension. Specimens may be seen, and lists of the various… … Fig. SS. The polariscope here represented (Fig. 58) consists of a Foucault prism, of 36 millimetres in diameter, as polarizer, and a Nicol's prism, of 20 millimetres in diameter, as analyzer.
Lantern projection · Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
