Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Date:
1914
Author:
Gage, Simon Henry, 1851-1944
Publisher:
Ithaca, N.Y. : Comstock Publishing Company
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Leaf #:
000363
Language:
English
Subjects:
Lantern projection, Motion picture projection
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
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348 DRAWING WITH HOUSE CURRENT [Cn. X To start with, the substage condenser diaphragm should be opened widely. In some cases the picture can be made sharper by afterward closing the diaphragm somewhat. For drawing, a skillful use of the substage condenser is very important. One must be more precise in its use than in ordinary microscopic observation. FIG. 194. DRAWING WITH A MICROSCOPE WITH THE ARC LAMP AT RIGHT ANGLES. In this picture a prism is placed beyond the ocular to reflect the light downward (fig. 192). The arc lamp is on the back side of the microscope with the condenser facing the mirror. The spot of light on the shield or disc above the lamp shows that the light is not centered along the axis of the microscope. The mirror must be turned slightly until the light reflected back from the substage condenser and microscope mirror enters the condenser tube of the arc lamp (see fig. 195). § 500. Plane mirror and substage condenser. — Use the plane mirror and substage condenser for all objectives of 12, 10, 8, 6, 4, and 2 mm. equivalent focus. § 501. Concave mirror and substage condenser. — For the 16 to 1 8 mm. focus objectives use the substage condenser with the concave mirror. It may also be necessary to separate the condenser somewhat from the preparation to light the entire field.