On Intestinal Rest and Movement. 



217 



53'5' to 9]/. There have been three series of contractions, lasting in 

 all 12'. Two of these were preceded by swallowing, which in 

 the first case was spontaneous, and in the second resulted from 

 rubbing the larynx. 1 



Total in 91'. — In this experiment made upon the fasting animal, out 

 of a total of 91' active intestinal contraction was present during 9', 

 faint contractions for 19' more, and the intestine was at rest for the 

 remainder of the time, i.e., 63'. One-half of the series of contrac- 

 tions were preceded by spontaneous or induced acts of deglutition. 



It cannot be demonstrated by the fixed sound method that the con- 

 tractions are any more than local contractions, but as the occurrence 

 of these for any length of time greater than 1' or 2' is very excep- 

 tional, and is almost always a prelude to propagated contraction, we 

 may assume with certainty that many of the long-continued phases of 

 contraction were propagative, or in other words they would have 

 propelled the sound downwards if it had been movable. 



From simple observation of the fistulous opening made immediately 

 afterwards, no sound having been introduced, I found that the number 

 of the series of contractions were in the two cases equal, but that in 

 the sound experiment their duration was slightly longer. 



An experiment made during a condition of hunger, but with a 

 travelling sound, will now be recorded. 



Experiment II, Chart I. Experiment VII, Chart VI. 



^tm/'.^ O 2 6' 8' lo' 12' 14 16' \8 20' ZZ 24 £6 2Q 30 '52' 34" 36' 38' 40 ' 42' 44 '46 



ml I VfKi. |bu t ~ : ; t ~ r ~- '• — : — 1 i ' ; ~ 



CONTRACT- . "-| . j 



130- 



