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 #:
00050
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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SCIOPTICON MANUAL. 41 screw-heads 7J inches apart; the flanges in the rear slide, under two similar screw-heads, holding the instru- ments down, but allowing them to spread till their disks coincide on the screen. The construction of the dissolver is shown in Fig. 17, in its three parts. The crescent-shaped dissolver a is mounted on the arm &, as seen in Fig. 16, so as to cover alternately the tubes on It and L, as it swings from side to side. The horizontal part of b slips into c till tho length of the united axle just allows the dissolver to swing clear of the tubes, and the whole is held in place by a socket-spring at each end of the baseboard. The dissolver is operated by the handles at c, which are adjusted at the proper angle to limit the lateral movement of a to the distance between tho tubes. Light the lamps in their place by reaching the wicks with a lighted match, and attend to them at first to see that they burn steadily and evenly. Focus a picture in .R, for example, while L is covered by tho dissolver, and Fig. 17. in L while R is covered; this reduces the disks to equal size on the screen. With tho slides removed, and the dissolver in the position as shown in Fig. 16, spread tho lanterns till the disks coincide. DIRECTIONS FOR PRODUCING THE DISSOLVING EFFECTS. —With the lanterns lighted, and arranged as shown in Fig. 16, and a slide placed in each, then the gradual