44 Mr. V. H. Veley. The Conditions of the [June 2, 



Series XXIII. 



Volume of solution = 60 c.c. Temperature, 24 9 + 0'l. 

 Ratio of nitrous to nitric acid = 1 : 3'86. 



These results are expressible by the formula 

 log(T + 0+logC = log A;, 



in which T is the time- from start, and t an interval of time which 

 would have elapsed from the moment at which, conditions remaining 

 otherwise the same, the amount of nitrous acid was infinitely great, 

 namely, C = co, and that moment at which the experiment was 

 actually commenced, C is the concentration, and & is a constant. 



In the above series the value for t is taken as 320', and in the table 

 below are given the values for log (T'-M), log c, and log Tc. 



The values in the third column show great concordance ; if the 

 mean 1-992 be taken and the results calculated therefrom, the ob- 

 served and calculated values for the concentration of the nitrons acid 

 will compare as follows : 



