122 



THE ROYAL SOCIETY OF CANADA 



Experiment 20. April 23rd. 



13 



Cylinder and frog removed. 



-1^22 

 0-98 

 0^78 

 0^67 

 024 



+ 105 

 2^68 

 636 



At 12.45 there was no sign of life. The heart was exposed but found to be 

 beating. The hind limbs were dead. The muscles of the fore part of the body 

 responded to stimulation. 



The frog therefore does not survive being kept for two hours at a temperature 

 between - 1 • 8° and - 1 • 5* C. 



This experiment shows the initial supercooling. We consider that the tem- 

 perature measurements in this, the final experiment in point of time, are the most 

 trustworthy. The estimated error is 02°, so that the freezing point of the frog 

 used was -0-44°±002°C. 



