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 #:
000463
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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448 POSITION OF PROJECTION APPARATUS [Cn. XII A Cross section showing the window shade (Sh) behind the thin boards (W W) which serve to exclude the light at the top, sides and bottom of the shade. B Face view of the window with the" light-excluding shade (Sh) shown in dotted lines, (L) indicates the size of the window frame. The sash cuts this down somewhat and the thin board frame to cut out the light around the edge of the curtain cuts it down considerably more. C Lateral view of the window with the shade in dotted lines. The lightexcluding frame around the edge is in full lines in B and C. § 613. Position of the projection apparatus with a level room.— In a level room, the projection apparatus at the back of the room must be at such a level that the projection beam goes over the heads of the spectators. This can be accomplished by building a platform, or by using a high table. In case the image is still not high enough on the screen, the lantern can be tilted slightly upward by putting a wedge under the end of the baseboard supporting it (fig. 240).. FIG. 240. SECTIONAL VIEW OF A LECTURE ROOM HAVING A GALLERY. B Black-board. This is lighted by incandescent lamps behind a curved, metal shield (H L). This gives plenty of light for the black-board without in any way injuring the brilliancy of the screen image. L T Lecturer's table on the platform (P). Ml The magic lantern in the gallery on its table and special support ( T). Sc Screenjfor the image above the black-board.