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. — Rokntgen 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 



i 



