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 #:
000212
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. VII] TROUBLES IN OPAQUE PROJECTION 197 2. If the amperage is to exceed 25 or 30, it is better to use an arc lamp with inclined or vertical carbons, not those at right angles for the magnetic blow puts the right-angled arc out too easily. 3. Do not have the carbons in contact with a hand-feed lamp when the current is turned on. Feed them together after the current is on, then they can be separated properly immediately after the arc is struck. 4. Inverted screen image. The object not properly placed on { the support, or no erecting mirror or prism is used. 5. No detail in the screen image. The object may be too light absorbing, or the light may not be sufficient. (See Troubles in Ch. I.).