1008 



DIGESTION 



In man these movements may be studied with the help of the Ront- 

 gen-rays, the person to be examined having previously ingested a mix- 

 ture of koumiss and subnitrate of bismuth. Most commonly, these 



FIG. 513. ROENTGEN CINEMATOGRAMS OF THE HUMAN STOMACH. (Kastle, Rieder, and 



Rosenthal.) 



examinations are made in the standing position, so as to be able to 

 note the lower boundary of the stomach, and to be able to determine 



