358 



E. Newton Hartley 



EXPERIMENT III 



Temperature 2^°-24°C. 



TIME IN MINUTES AFTER 

 1.20 P. M. 



CC. ^jj ACETIC TO 50 CC. S. W. 



3 mm. 

 6 min. 



25% I 45% 50% I 80% 

 70% * 90% ' 60% 



90% 90% 90% none 



li mm. 



3 min. . 

 6 min. . 



Temperature J4°-JJ°C. 



none 



occasional 



20% 



10% 

 100% 

 100% 



none 

 none 

 none 



*Mi; 



The above tables may be simplified as follows 



EXPERIMENT I 



Temperature 



28°. 



35°- 



Temperature 



'4° 



'9° 



30° 



O ptimum time oj exposure 



EXPERIMENT II 



ptimum time oj exposure 



Minutes 

 7 

 4 



Minutes 

 4 



3 



There is about a halving of the time of exposure required for a 

 rise of 10° C. When the optimum concentrations instead of the 

 optimum times are compared as in Experiment III the following 

 result is obtained: 



