Walsh, David · London : Baillière, Tindall and Cox · leaf 54
inary examination might be laid bare in an instant bya glance through the fluoroscope. This promptness has com-mended the screen to the enthusiastic praise of the army surgeonswho have used it in actual warfare. The cryptoscope, or fluoroscope, does away with the necessityof a darkened room. It… … Fig. 22.—The Cryptoscope. Many attempts have been made to photograph direct from thescreen, but hitherto without much success. Tracings may bemade upon transparent paper laid on the screen surface, or witha pencil on paper placed against its cardboard back. VI. PHOTOGRAPHY A knowledge of…
X-rays · Radiography
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