SELIG HECHT 



673 



AO 



J.5 



8 



\ 2.5 



I 



^ /.5 



/.O 



0.5 



/O" 



/5° ^0° ^5' 



JerDperafure 



eo' 



Fig. 2. Relation between temperature and reaction time. The reaction time 

 minus 0.21 second gives the latent period. Each point is the average of five 

 determinations on one animal. The heavy line is the theoretical expectation 

 according to the Arrhenius formula when n = 19,680. The light line gives the 

 general trend of the data above 21°. 



