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 #:
00042
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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SOIOPTICON MANUAL. 33 vent thefr getting out of place and scratching against each other; also between G f and jfiT, and between the condensing lenses. The cap J is removed and placed behind the chimney. The whole is snugly packed in a box with stuffing, and the cover fastened on with screws. These particulars may be advantageously referred to in case of repacking by the purchaser or borrower. RULES FOR OPERATING THE SCIOPTICO\. In unpacking a new instrument the parts must be separated, to remove the packing papers. Dust them if necessary. For the lenses and reflector use a duster that is soft and clean. "Warm and dry the condensing lenses if inclined to fog. Adjust I 1 , 6r, 6r', J, and the lenses, as seen in Fig. 15. Shut the extension front back to its place. Fill the lamp about two-thirds full with standard kerosene oil. The fire test should be 110° at least; that of Pratt's astral oil is 145°. Avoid carelessly tilting the lamp when it is very full, and so avoid the smell of oil evaporating from the out- side surface. Turn down the wicks, so they will not rub against the deflecting plate while withdrawing or inserting the lamp. It is convenient to stand the instrument so as to be about breast high. The image enlarges as the distance of the instrument from the screen increases. With a medium objective, a distance of sixteen feet gives a disk of eight feet, &c. Exhibitions of this sort appear to the best advantage