Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Date:
1914
Author:
Gage, Simon Henry, 1851-1944
Publisher:
Ithaca, N.Y. : Comstock Publishing Company
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Leaf #:
000357
Language:
English
Subjects:
Lantern projection, Motion picture projection
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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342 DRAWING WITH HOUSE CURRENT [Cn. X will wander but little, if at all, and the light will be more constant. § 491. Feeding the carbons together. — If one has an alternating current to work with, the small arc lamp will burn about 10 minutes with 8 mm. carbons before going out. With the rightangle position the carbon giving the light remains constantly in the axis. With inclined carbons, it rises constantly above the axis. The carbons with the right-angle arc should be fed about every five to seven minutes to insure the best light. FIG. 190. SIDE AND FRONT VIEW OF SMALL CARBONS WITH FIVE AMPERES OF DIRECT CURRENT (Natural Size). Compare fig. 191. FIG. 191. SIDE AND FRONT VIEW OF SMALL CARBONS WITH FIVE AMPERES OF ALTERNATING CURRENT (Natural Size). The crater is much smaller than with direct current (fig. 190).