Practical cinematography and its applications (1913)

Page scan 000198 from Practical cinematography and its applications

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000198
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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RADIO-CINEMATOGRAPHY 149 photography had not reached its present stage, and therefore he had to contend with certain difficulties which no longer exist. Monsieur Carvallo was probably the first worker to attempt to portray in movement the elusive and peculiar features revealed by the Rantgen rays. One or two other scientists had dabbled in the art, but their achievements were not very convincing for the simple reason that they did not employ chronophotography. Mon- sieur Carvallo, however, being fully aware of the valuable work that had been carried out by Dr. E. J. Marey, saw the true way of applying radiography to cinematography, and saw that it could not fail to be of scientific value. He em- barked upon a number of illuminating, though tedious, experiments, in the effort to combine these two branches of photography. Carvallo's installation was of a most elaborate character, but he accomplished some marvellous results, the full significance of which are appre- ciated only to-day. The complete apparatus he used in his experiments is shown in Fig. 9. The source of energy was a small electric motor, capable of making 2,000 revolutions per minute with a current of only 50 volts. This motor was extremely sensitive, since it would make 300 revolutions per minute with a current of 10 volts. The control of the speed was