LYMPH FLOW 



15 



III. THE BEHAVIOR OP HEALTHY LIVING FROGS WHEN TRANS- 

 FERRED FROM WATER AT ONE TEMPERATURE TO WATER AT 

 ANOTHER 



In one hundred experiments made by the writer, in which 

 normal healthy frogs were transferred from water at a low 

 to water at a higher temperature, seventy-three lost and 

 twenty-seven gained weight immediately after the transfer. 

 The average initial maximum loss in weight amounted to 5.9 

 per cent, and the average maximum gain to 3.22 per cent. 



Molt5n 



Cam 



Hout-s 



Also, in sixty-six experiments, in which normal healthy frogs 

 were transferred from water at a high to water at a lower 

 temperature, fifty-six, or about 85 per cent, gained, and ten, 

 or about 15 per cent, lost weight immediately after the trans- 

 fer. The average initial maximum gain in weight amounted 

 to 3.79 per cent and the average initial maximum loss to 2.44 

 per cent. 



The fluctuations in body weight which resulted when a liv- 

 ing frog (R. pipiens, no. 246) was alternately transferred 

 from water at one temperature to water at another are 

 graphically represented in figure 5. The numerals opposite 



