Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures
Date:
1914
Author:
Gage, Simon Henry, 1851-1946
Publisher:
Ithaca, N.Y. : Comstock Publishing Co.
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures
Leaf #:
00096
Language:
English
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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CH. Ill] MAGIC LANTERN WITH SMALL CURRENTS 81 FIG. 42. THE SMALL ARC LAMP OF THE SPENCER LENS Co. With this small arc lamp the two carbons may be moved separately or together, as the carbon movement is like that of the larger lamps, i. e., one shaft within the other, and the corresponding milled heads are placed close together, so that either can be turned separately or both together. It is arranged for giving parallel or converging light. When used with the magic lantern the special condenser and its tube are removed (fig. 47). automatic lamp are so adjusted, or may be so adjusted if desired, that they will work with currents ranging from 5 to 25 amperes (fig. 41-44) The small lamps (from their size, called "Liliput or baby" arc lamps) are largely used for darkground illumination and ultramicroscopy and for drawing. For these purposes they have a tube attached with a condensing lens (fig. 41). For use with the magic lantern the tube and condensing lens are removed (fig. i).