11' NGER \M> Al'1-I.'l : 





increases in intensity, until bj the time I mach I 



itself the tonus has become conspicuous, ;ni<l the ger hu con- 



tractions usually begin to appear. Superimposed upon tho 

 tonus rhythm, hunger pangs may appear in mi 



contains tract 8 of food. 



Fig. Id/. — Tracing of the tonus rhythm of th< 



Carlson.) 



By Btudying the shadow of the outline of the stomach produced by 

 having a person or animal swallow two balloons, one inside the other 

 and with a paste of bismuth subnitrate between them, it lias been "1>- 

 served that the weaker type of hunger contraction begit ••"!!- 



168. — Tracings from I 



striction involving the cardiac end of the Btoniacl 

 the pyloric end ;is a rapid peristaltic wave. When tl 

 very vigorous, this wave spreads •*,. rapidly o\ 

 difficull to determine whether it reall; 

 or as ;i contraction involving the fund i who 



