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 184
175 SCIOPTICON MANUAL. able heat is produced in making the mixture, and for this reason it should be made beforehand in an earthen- ware, not a glass vessel, so as to allow sufficient time for it to become cool before being added to the granulated zinc contained in the generator a (Fig. 47). … Fig. 47. About two pounds of zinc is introduced into the generator (a glass bottle to hold five gallons or more, or a vessel made of lead), the top of which, bearing the tube funnel and bent exit tube, is then replaced, and the joint being made airtight (in the case of a leaden gene- rator by means…
Lantern projection · Slides (Photography)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
