on the Living Si/stem. 59 



Ahtx two minutes the pulse rose 286 and 

 was stronger ; after six minutes, it had fallen 

 below its natural standard and was become 

 very feeble. 



This animal lived only two hours and 14 

 minutes : on examination after death, no con- 

 tractility was evident in any of thfe voluntary 

 muscles. The thorax was opened ; the left 

 side of the heart was motionless, but a slight 

 quivering was evident in the right side. 



EXPERIMENT 35. 

 With Opium. 



'>Tu«rs. Minutes. 



1. 14. Half art ounce of the solution was 



thrown down the oesophagus of a 

 full grown rabbit, the heart beat- 

 ing 270 in a minute. 

 49. The heart beats with great force 

 and velocity, 310 in a minute. 



2. — Heart beats about 300 in a mi- 



nute. 

 30. Heart has become more feeble ; 

 beats no more than 210 in a 

 minute. 



H 2 



