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 #:
000542
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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CH. XIII] RHEOSTATS AND OTHER BALLAST 527 If one wishes a greater amperage the upper wire is lowered in the barrel and if less current is desired the upper iron is lifted higher in the barrel (fig. 282). Of course there must be some means of holding the upper wire in position when it is at the right height in the barrel. FIG. 283. WATER COOLED RHEOSTAT. Wlt W2 Conductors. R Rheostat composed of the proper length of small naked wire wound around a frame of wood. The two ends of this resistance wire are soldered to the cut ends of the supply wire W3 Wy The rheostat is then immersed in running water and the containing vessel of wood, glass or stoneware is placed in a sink.