[cameron-brownlee] temperature AND THE FROG 



73 



II. EXPERIMENTS ON THE INTACT ANIMAL, IN AIR SATURATED WITH 

 WATER VAPOUR AND KEPT AT A CONSTANT TEMPERATURE. 



The experimental details were the same as the first series of 

 experiments, except that the frog was placed in a small wide-mouthed 

 bottle, connected to the air by a moderately wide tube, and this 

 air-chamber was placed in the thermostat and the latter heated as 

 before. The bottom of the bottle was just covered with water so 

 that the frog was in an atmosphere saturated with water vapour and 

 could not lower its own temperature by evaporation of water through 

 the skin. It should be noted that in these experiments the ther- 

 mometer passing into the gullet did not interfere with respiration, 

 which proceeded normally, except as regards rate, until the animal 

 lost consciousness. The results are shown in the following table. 

 The external temperatures are those in the frog's containing vessel. 

 The time taken to reach the maximum temperature varied from 40 

 to 60 minutes. The experiments were carried out between January 

 25th and February 25th, 1915. 



