Practical radiography : a handbook for physicians, surgeons, and other users of X-rays (1901)
Isenthal, A. W, Ward, H. Snowden (Henry Snowden), 1865-1911 · London : Published for The Photogram, Ltd. by Dawbarn and Ward, Ltd. · leaf 116
the vacuum of atube may be altered, though the tube itself be hermeti-cally sealed. The following are some methods :— 1. By the application of heat.—Assuming, as wehave done, that air is occluded and condensed in the tubeafter some working, we may to some extent liberateit, and so increase the… … Fig. 48. descent; the former is the more usual method and easierto apply. This treatment, of course, does not presuppose anyparticular design of the tube, and may therefore beuniversally employed with all types. In this classmay be ranged the Double Bulb tube, shown inFig. 48. The distinguishing…
Radiography · X-rays
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