Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14755788284)

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



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passage through the air. (Fig. 95.) By employing theventril tube the current becomes unidirectional, the rays have agreater penetrative power, blackening is minimized, and the life of thetube is prolonged. I find the self-regulating ventril tube to be eminentlysatisfactory. 188 ELECTRO-THERAPEUTICS. Puncture of the Anti-cathode.—This accident occurs only in tubeswith very thin and non-supported anodes; especially did puncture ofthe anti-cathode happen when the Wehnelt interrupter first came intouse. This difficulty has been overcome by increasing the thickness ofthe anode, and also by reinforcing it in back by means of copper ; like-wise by making the converging cathode rays fall at a point a little inadvance of the anode. Explosion of the Tube. — When a tube is accidentally broken, thesudden inrush of air produces a report resembling that accompanyingthe explosion of a firecracker. I believe the term explosion is amisnomer; the substitution of the term collapse would appear to me
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Fig. 95.—Villards ventril tube. to be more correct, for the general breaking up is more likely the resultof external atmospheric pressure than due to any force created inter-nally. In the experience of years I have never suffered the explosion ofa tube. The ^life of the tube depends largely on the amount of its use,and the care in manipulation bestowed upon it. The metallization ofthe tube interferes in no manner with its working. In regard to the consumption of tubes by the use of small and largeinductors the conclusions reached by Albers-Schonberg are of the greatestpractical importance. He has kept a complete record of the use of eachtube and the conditions under which it was used, and concludes that thelife of a tube used with an 80 cm. coil is more than three times as longas when used with a 40 cm. coil. The small coil used in this instancewas the Dessauer instrument. At the same time he found that the workdone by the tube in connection with the large coil was more satisfactory