Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571457790)

Identifier: rntgenrayselectr00kass (find matches)
Title: Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy
Year: 1910 (1910s)
Authors: Kassabian, Mihran Krikor, 1870-1910
Subjects: Electrotherapeutics X-rays Phototherapy Radiology Radiotherapy
Publisher: Philadelphia & London : J.B. Lippincott Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



Text Appearing Before Image:
Fig. 115.—Prism stereoscope of Walter. details is afforded. I believe this process will be useful for stereo-scopically illustrating medical journals and scientific books. There isanother method of combining stereoscopic pictures without an instru-ment, which can easily be acquired by crossing the visual axes. Placethe skiagraph in front, hold up the index finger in the middle linebetween the eyes and the skiagrams, and while looking at the top ofthe finger, a third picture will appear in the centre, offering a mostbeautiful stereoscopic effect. E. Advantages of Steeeo-skiageaphy. An ordinary skiagraph is composed of superimposed shadows ofdifferent densities, which appear flat on the negative or print, and in ad-dition contains many shadows appearing indistinct and weak, but inthe stereoscopic pictures the superimposition will be more distinctand visible. Two plates exposed at different angles are used, and anydeficiency in one is easily compensated for in the other. Another
Text Appearing After Image:
Fig. 114.—Wheatstones reflecting stereoscope, as modified by Weigel.