3(j Mr. V. H. Veley. The Conditions of the [June 2, 



In these sets of experiments, also, the amount of nitrous acid formed 

 increases up to a temperature of 32, and from this point again 

 decreases. Further from comparison of results obtained with the 

 two samples of acid at the same temperature it is evident the per- 

 centage ratio of nitrous acid is increased with decrease of concentra- 

 tion. To confirm this a further series of experiments were conducted 

 with an acid of one-fourth of the concentration of that used in the 

 first set. 



Concentration of acid = 0'0655 gram in 1 c.c. 



Series XI. 

 Temperature, 22'5. 



Series XII. 

 Temperature, 32. 



Series XIII. 

 Temperature, 42. 



Series XIV. 

 Temperature, 52. 



The results given in the four tables above are perfectly in accord- 

 ance with those of the preceding series, the maximum value for the 



