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 #:
00081
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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66 DO AND DO NOT WITH THE MAGIC LANTERN [Cn. I 14. Make sure that the condenser is arranged with the proper lens next the radiant. If a three-lens condenser, the meniscus should face the source of light ; if a two-lens condenser, it is the lens in a special mounting (fig. 36 B), or if there is no special mounting, it is the one of shorter focus usually, i. e., of 15 to 19 cm. (6-7^ in.), while the one next the objective is often of longer focus. 15. Mark or "spot" the lantern slides so that they may be inserted in the lantern correctly (§ 23, fig. 7, 8, 13) and arrange the slides as desired before the exhibition (§ 21). 1 6. Make sure that everything is in working order, the room properly darkened, and the proper amount of current available (10 to 15 amperes). 1 7 . Light the arc lamp before the room lights are turned off (§ 33) 1 8. Keep the arc lamp burning until the room lights are turned on (§34). 19. After the last slide, show simply a lighted screen (§ 34). 14. Do not reverse the ends of the condenser and thus have the wrong lens next the light and the wrong one next the objective. 15. Do not try to exhibit slides that are not in order and not marked for insertion in he carrier. 1 6 . Do not attempt an exhibition unless the room is properly darkened, and the apparatus in working order. 17. Do not let the room get dark, but turn on the arc lamp before the room lights are out. 1 8. Do not turn out the arc lamp until the room lights are turned on. 19. Do not keep the last slide in the holder too long, but show a light screen to indicate that the last slide has been shown.