Almost every one knows that it is possible to introduce bismuth into the stomach and then, by use of the Xray, to obtain a photograph of the stomach's outlines. The method has become invaluable for the diagnosis of such conditions as ulcers of the stomach-wall. It has long been felt that valuable information could be had regarding the gall-bladder if some method could be found of introducing a substance into the gall-bladder which would make possible the photographing of its outline. Drs. Warren H. Cole and Evarts A. Graham of the Washington University...
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