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 155
If the coil also is placed inthe dark room, it becomes necessary to cover the inter-rupter spark by encasing the interrupter in cardboard orpaper. When examining very small objects on a fairly largescreen (say, for instance, a finger) it is a good plan to coverthe screen with a piece of cardboard… … screen image, to remain for some few minutes in completedarkness, before studying the screen, so as to be able tofully appreciate all the details of the image, a matter call-ing for great practice and perseverance, especially wherethe proper reading of the radioscopic image of the internalorgans is…
Radiography · X-rays
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