PHOTIC REACTIONS OF TADPOLES 



257 



TABLE i— Continued 



In figure 4 are plotted the data with blind tadpoles as re- 

 corded in table 4. In order to secure a wider range of comparison 

 to this was added the results with 1.2 candle-meters in table 3. 

 When the average reaction-times are plotted on the ordinates as 

 functions of the intensity of light, the plotted points give a 

 hyperbola (curve- A) . The logarithm of the average reaction- 

 times plotted as function of the logarithm of the intensity, gives 

 a straight line (B). From the hyperbolic representation it is 

 clear that the reaction time holds a definite relation to the inten- 



