!)2 



lion "wells." The metal walls of the latter were covered 

 with wood or cloth so as to avoid contact between the 

 animal and llic cold metal. The inguinal temperature 

 increased by about \ decree duiini*' the first 13 minutes, 

 it came back to normal during the following 12 minutes, 

 and decreased by I degree during the next 75 minutes. 

 Then it dropped rapidly, while at the same time respira- 

 tion and heart beat Ix'came slower and slower. When the 

 temperature reached 22° the animal was withdrawn, inani- 

 mate, and it did not recover. 



The same author reported that a cat which fell into a 

 liquid refrigerating mixture at - 30° to - 35° died ''almost 

 suddenly." The more rapid cooling of the body when 

 in contact with a licjuid than when in contact with air, 

 is considered the cause of the I'apid death. 



According to Winternitz (1894), a rahhit, whose body 

 temperature drops to 34° to 31°, begins to shiver, it tends 

 to fall asleep at 31° to 29°, and finally, when the tempera- 

 ture reaches 22° to 19°, breathing ceases and the animal 

 dies. 



Simpson (1902) placed a monlxey {Macacus rhaesiis), 

 fully etherized, into a double-walled chamber made of thin 

 sheet-iron, and cooled wdth lumps of ice inserted into the 

 space between the walls. The animal could be observed 

 through a sliding glass door. The rectal temperature, 

 pulse rate and respiration rate were taken every 1 or ^ 

 hour. After 3\ hours, the body temperature had fallen 

 to 14°, the heart beat had ceased and the respiration rate 

 was reduced to 2 per minute. The ice-water was then 

 removed and quickly replaced by hot ^vater till the cham- 

 ber temperature stood at 41.6°. When, after 5 hours, the 

 rectal temperature had risen to 37.7°, the animal was 

 removed from the chamber and placed in a room at 25°, 

 where it recovered completely in a further 2i hours. 

 Another monkey whose rectal temperature had been 

 lowered to 12.5°, under the same conditions, succumbed. 



According to Simpson and Herring (1905), cats, whose 

 normal temperature is about 38°, can be cooled till their 



