On Intestinal Rest and Movement. 221 



Experiment IV, Curve III. 



Eeduced scale =^th. 



11'. Active peristalsis has developed, the sound passing with great 

 rapidity onwards; so little relaxation occurs that the curve 

 has the appearance of steps at some parts. 

 . 16'. Sound lying within lower fistulous opening through passage of 

 which it is retarded by thick muscular and cutaneous walls, 

 which somewhat overhang in this position. 



In order to render the alteration in the speed of peristaltic propul- 

 sion more apparent, I formulate from the experiment the distance 

 traversed by the sound in every two successive minutes. 





Distance accomplished by 



Time after introduction of 



sound in centimetres. 



sound in minutes. 









Fasting. 



Fed. 













2 



1-6 





4 



1-0 





6 



2 • 2 





8 



0-5 





10 





0-5 



12 





4-3 



14 





31 



16 





2-2 



Total for 8 minutes before food 5*3 cm. 



„ after „ 9'7 „ 



If we employ a rapidly revolving drum, the time elapsing between 

 the introduction of food into the stomach and the occurrence of con- 



VOL- XLI. Q 



