The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

Record Details:

Title:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Date:
1877
Publisher:
Philadelphia, J. A. Moore
Volume:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Leaf #:
00039
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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30 SCIOPTICON MANUAL. thus holding the instrument firmly in place. "When a pair is used for dissolving views, the fronts are thus held in a fixed position, while the rear ends may be spread apart till the disks on the screen coincide. o o / —Stage and spring for wooden-mounted pictures. The opera- tor standing behind, slides a picture horizontally in at o, letting it bear against the condenser mounting, and letting it project equally Fig both sides of the cylinder. The picture is drawn out with the left hand, while with the right hand another is made to follow in its place, so as not to show the white disk on the screen. p q — Condensing lenses. Lenses when taken from a damp or cold place are apt to become covered with moisture, which shades the pictures. It is better when this is likely to be the case, to let the instrument stand in a warm room awhile, or else to draw the lenses apart and dry them before beginning an exhibition. r — Brass ring, holding the condenser cells suspended in the cylin-