Lantern-slide making and exhibiting ([pref. 1905])

Page scan 00040 from Lantern-slide making and exhibiting

Record Details:

Title:
Lantern-slide making and exhibiting
Date:
[pref. 1905]
Publisher:
London, Marshall, Brookes & Chalkley
Volume:
Lantern-slide making and exhibiting
Leaf #:
00040
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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25 CHAPTER VII.—Hints on the Management of the Lantern and the Exhibition of the Slides. Preliminary Considerations. The Principles of Optical Projection Explained. HAVING, by carefully following the foregoing directions, succeeded in making a series of good lantern slides, we must next consider how they may be ex- hibited to the best advantage. This involves the possession of an optical, or as it was formerly called, magic, lantern, with its accessories, and a suitable lantern screen. These directions for the proper mani- pulation of the lantern will be more readily followed if the novice be familiar with the principles on which it is constructed. Referring to Fig. 8, A is the body, BB the condenser, C the illuminant, D the stage, E the front, and F the pro- jecting lens. The bodyAA is usually made of metal, tin, or iron, and some- times of wood lined with metal. The object of the body is to enclose the illu- minant and prevent light Fi *' 8 - Modern type of lantern. other than that transmitting the image from passing out into the room and detracting from its brilliance. The function of the condenser B is to condense as many rays of light as possible from the illuminant C through the slide, which latter is placed in a frame, or carrier, in the slide stage D, the enlarged image being projected by the objective F, which is fitted into the front E.