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 #:
000445
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:
November 02, 2023
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RONTGEN-RAY PHOTOGRAPHY 351 moved as far as possible from the lower, and the connecting wire from the anode ( + ) of the main tube moved to the positive terminal ( + ) on the small upper tube, the other connecting wire being still connected with the kathode. If the current is turned on for a few seconds, the hardness of the tube will increase, and work may then be resumed with the connecting wire attached to the anode of the main tube. Sometimes a very much stronger current through the tube is required, so as to produce X-rays of sufficient strength for use beneath an X-ray couch, when taking a Fig. 155. photograph with the plate placed above the body on the couch. In such cases, it is usual to dispense with the ordinary interrupter attached to the coil, by screwing it into light contact with the core, and in its place to use an electrolytic interrupter in series with the battery in the primary circuit, as is shown in figs. 155 and 156. When this is done, the current through the tube is so great that the ordinary anti-kathode wTould soon be melted. To avoid the risk of this it is kept cool by water. A tube suitable for such purposes is shown in fig. 157. Photographs by Rontgen-rays. — In the photographs