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 #:
00064
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. I] TROUBLES WITH THE MAGIC LANTERN 49 the line wire which is not grounded. In some cases one wire is purposely grounded. In such cases great care must be taken not to ground the other wire (see also fig, 266-267 § 689). § 77. There may be too much resistance in the circuit. Open the rheostat wider, if it is adjustable (fig. 281), keeping an eye on the ammeter to see when the current is of the desired amperage. FIG. 22. INCLINED AND VERTICAL CARBONS IN THE CORRECT RELATIVE POSITION. The upper carbon is positive and supplies the light in both cases. FIG. 23. CARBONS IN THE CORRECT RELATIVE POSITION FOR BOTH DIRECT AND ALTERNATING CURRENTS. A Inclined carbons in the correct position for alternating current. B Inclined carbons in the correct position for direct current. C Carbons at right angles in the correct position for either direct or alternating current. Direct current is indicated. D Carbons arranged in a V-shaped position. For this position alternating current only is employed; and the crater on each carbon contributes to the light. The V may be either in a vertical or in a horizontal plane. The vertical arrangement is the more common.