On Intestinal Rest and Movement. 



223 



marked contractions, having approximately a maximal value ; in the 

 second there were seventeen. 



After the lapse of another five minutes, the administration of 

 another piece of meat failed to arouse any contractions. 



Immediately after a full meal a travelling sound introduced into the 

 upper fistulous opening is forwarded by a powerful and regular peri- 

 stalsis to the lower opening and promptly expelled, no marked halt 

 occurring during the passage. Not only do the local contractions 

 manifest themselves to a striking extent, but writhing, &c, rolling 

 movements (" Roll-Bewegnngen ") of the fistulous intestine are also 

 observed. It is during this period that the most rapid propulsion of 

 the sound occurs, relaxation between the contractions is very imper- 

 fect, the sound being held without marked retrogression till the next 

 powerful wave drives it onwards. 



The presence of abundant peristalsis in the small intestines gener- 

 ally is evidenced by borborygmi and movement communicated to the 

 abdominal parietes. The increase of secretion which, is extruded 

 from the lower fistulous opening, and to a much smaller extent from 

 the upper opening, is very apparent. 



I select two experiments for illustration. 



Experiment VI, Curve V. — Fifteen minutes after full Meal. 



Reduced scale = x * T ths. 



Experiment VI (Chart V (broken line, diagrammatic) and Curve V). 

 — Taken 15' after a full meal (contrast this with Observation III 

 made on the same day before the meal). Large capsule employed. 

 The animal slept the whole of the time. 



Q 2 



