40 VICTOR E. SHELFORD 



Chart III 



Showing behavior of the wood frog (Rana sylvatica) in evaporation gradients. 

 In the dry air and air current experiments where avoidance of the higher evapora- 

 tion by stimulation and acceleration is shown. In the temperature experiment 

 modification of reaction is indicated. In control 73 the C's indicate that the air 

 in the control cage was moving. For further explanation see Chart I. 



