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 #:
00092
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. II] SUMMARY FOR ALTERNATING CURRENT LANTERNS 77 7. Focus the screen image with special care when using alternating current lest the two sources of light produce a doubling of the screen image. 8. Use opera-glasses, if necessary, for focusing sharply a distant screen image (§38). 7. Do not forget the greater need for accurate focusing with an alternating current lamp, on account of the double source of light. 8. Do not forget the advantage in using opera-glasses for focusing if the screen distance is great. 9. Look out for shadows on 9. Do not permit any defect the screen. Center carefully in the management of the lan and remove all causes for shad tern, suspended strings, etc., to ows (§ 83-93). give shadows on the screen. 10. Study the "Troubles" in 10. Do not neglect any of the § 116-118, and 62-98. causes for "Troubles."