Practical cinematography and its applications (1913)

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000218
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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MICRO-CINEMATOGRAPHY 165 concentrate solar light by means of a parabolic reflector or lens, and then to throw it through the microscope slide. The great drawback to this system is that intense heat is thrown upon the slide containing the organisms, and for these small creatures heat spells death. The same difficulties arise with acetylene and electric light. What is necessary is either to extinguish the light at intervals, in synchrony with the closing of the lens, or to intercept it so as to keep it off the subject until the exposure is to be made. This is done in a variety of ways by different workers. Some years ago, when Messrs. Bull and Pizon of the Marey Institute were engaged in the micro- cinema study of a colony of marine organisms, they adopted the apparatus and method of arrangement shown in the illustration facing p. 164. The microscope C was attached to the cinematograph B which was driven by the clock A. In this case it was only necessary to make exposures at relatively long intervals, and to continue them through several days and nights, so as to obtain a complete cycle of the phases of the development of the organisms. Consequently the clock was introduced in order to make the exposures at the right intervals. The organisms were placed in a small flat glass tank or vessel D, and were illuminated