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 #:
000226
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. VIII] PREPARATION OF LANTERN SLIDES § 328. Negatives as lantern slides. — Many objects appear equally well and equally clearly when projected from a negative as from a positive or transparency. That is, there will be white lines and white letters, etc., on a black background. This was a favorite method of illustrating in the older works on physics and projection. For examples, look at the pictures in Dolbear's Art of FIG. 1 1 8. PHOTOGRAPHIC CAMERA UPON A BASEBOARD HINGED TO A TABLE. (From The Microscope). This is one of the copying, enlarging and reducing cameras. The objective may be at the end, in a cone, or in the middle segment. For lantern-slide making it is in the middle segment and the negative at the end, the whole camera being directed upward toward the sky. By reversing the position of the camera, and placing the hinged board in a vertical position, objects in liquids and any object in a horizontal position can be photographed. NOTE. — The arrangement shown in fig. 1 18 with a baseboard hinged to the table, and with a camera which could be placed pointing upward or downward was devised by the senior author in 1878 especially for photographing objects in liquids or objects which must remain in an inclined or horizontal position. The baseboard carrying the camera can be fixed in any position from the horizontal to the vertical. (Proc. Amer. Assoc. Adv. Sc. Vol. XXVIII (1879), p. 489; Science, Vol. Ill, p. 443, and Vol. IV, p. 5 (1884).