The advance of photography : its history and modern applications (1911)

Record Details:

Title:
The advance of photography : its history and modern applications
Date:
1911
Publisher:
London : K. Paul, Trench, Trübner & Co., Ltd.
Volume:
The advance of photography : its history and modern applications
Leaf #:
00099
Language:
English
Subjects:
Motion Pictures, Motion pictures--Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
May 02, 2024
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PSEUDO-PHOTOGRAPHIC EFFECTS 77 twenty-five minutes. The bromide paper should then be developed in the usual way. Thus by this method it is possible to produce a positive print without an intervening negative. Photo-electric Effect. — Another interesting phenomenon due to the action of light upon metals has been discovered and investigated during the last few years. When a metallic surface is brightly illuminated by ultraviolet light negatively charged particles are set free from the surface into the surrounding air. This action has been studied in the case of zinc, and is very clearly marked in the case of a liquid alloy of potassium and sodium. Prof. J. A. Fleming x has made use of this property in the case of that alloy to produce an electric cell which owes its activity entirely to the action of light upon the metallic surface. 1 Phil. Mag., 17, pp. 286-295, Feb. 1909.