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In 1914, I1 described the technic of visualization of the upper intestinal tract by the conjoint use of the duodenal tube and the roentgen ray for the purpose of studying the course of the entire duodenum and the commencing jejunum. It was emphasized then that by this method displacements and angulation of the duodenum, as the result of periduodenal adhesions, could be detected, which is not always possible by the usual fluoroscopic and roentgen methods. The pro-Fig. 1.-Relative size and weightdoi:10.1001/jama.1920.02620490017006 fatcat:ukwkmrlphvaj3nyzy4k3e2kjgm