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 #:
000468
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. XII] POSITION OF PROJECTION APPARATUS 453 Occasionally when the seats are on a steep incline there is left a space through which the projection objective can send its beam to the curtain, the apparatus and operator being under the seats of the amphitheater. § 618. Apparatus on one side of the room. — Occasionally the apparatus is put on one side of the room and instead of projecting directly in front of the audience the projection is on one side of the room. The auditors simply turn in their seats to face the screen. L T FIG. 245. SECTIONAL VIEW OF A LECTURE ROOM SHOWING THE POSITION OF THE PROJECTION APPARATUS WITH A TRANSLUCENT SCREEN. Ml Magic lantern or other projection apparatus on its table (T) and raised platform (PI) in a room outside the lecture room. L T Lecturer's table. Tr Sc Translucent screen. The audience does not see the apparatus; only the screen image is visible. Lantern slides must be inserted in the holder facing the objective, not the light, or the image will have the rights and lefts changed like fig. 213. This is not so satisfactory as when the screen is directly in front (fig. 243). § 619. Apparatus wholly without the room. — Regardless of the form of the room, the apparatus may be placed in a room just back of the lecture table in front of the audience and a translucent screen employed. This arrangement has decided advantages, but a translucent screen is not so satisfactory as a white opaque screen (see fig. 245). § 620. Special operating room. — With the ordinary magic lantern and projection microscope the apparatus and operator are