On Intestinal Rest and Movement. 



225 



The last experiment was made with a metal capsule, and in order 

 to show that the nature of the sound has no marked influence upon 

 the rapidity of propulsion immediately after food has been introduced 

 into the stomach, I shall quote the results obtained when the meat 

 sound employed in Experiment II was substituted for the metal 

 capsule. It will be seen that whether the body to be forwarded by 

 peristaltic movement be incompressible or soft and plastic, the result 

 obtained is practically the same. 



Experiment VI (Chart and Curve YI). — The dog had finished a full 

 meal six minutes before introduction of the sound. 



0'. Introduce meat sound deeply through the upper fistulous open- 

 ing. Animal sleeping. 

 1'. II mm. traversed. 



„ f Very strong peristalsis with some 

 „ < "roll" movements of the loop of 

 ,, I intestine. 



,, Animal awake, deep respirations. 



55 



" r Slight delay towards lower mouth of 



" J fistulous tract, the last 2 cm. of which 



" j seems occasionally to act more feebly 



" \ than the rest. 



Tabulated with the results of Experiment II (Chart I) the speed of 

 propulsion is relatively the following : — 



Time after introduction 

 of sound in minutes. 



Sound travels 



Before food (hunger). 



Six minutes after food. 





cm. 



cm. 















2 







3-4 



4 



0-5 



4-3 



6 



1 



3-4 



8 



1 



2-6 



10 



0-3 



23 



12 









14 



o-i 





16 



0-6 





The sound traversed 11 " 5 cm. of the fistulous intestine of the fasting animal in 46'. 



„ „ „ fed „ 6* 5'. 



During the later stages of digestion, i.e., one and a half to three 

 hours after a full meal, the transmission of a solid body through the 



2'. 



35 



55 



3'. 



62 



55 



4'. 



76 



55 



5'. 



92 



55 



6'. 



103 



55 



7'. 



113 



55 



8'. 



119 



55 



9'. 



123 



55 



9' 30". 



131 





