Catalogue and price list of stereopticons, dissolving view apparatus, magic lanterns, and artistically-colored photographic views on glass. (1887)
T.H. McAllister (New York, N.Y.) · The Company · leaf 49
Some operators prefe:to make a double pres-sure board, placing thebags one over the other,as shown in this diagram,and thus make the sameweights answer for bothbags. no m • .™ T. H. McAllister, Manufacturing Optician, New York. OXY-CALCIUM STEREOPTICONS. … The Oxy-Calcium Light is inferior to the oxy-hydrogen, though farmore intense than the most brilliant oil lamp, its illuminating power beingequal to the light of one hundred candles. It differs from the oxy-hydro-gen in using but one gas, oxygen; the flame of an alcohol lamp replacingthe hydrogen.…
Projectors · Lantern projection
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