14 MCDOUGALL AND HOWLES, Nitric Acid from Air. 



conditions, the yield of acid in each case was almost 

 identical, and is readily compared in the following table. 



The current during the first three experiments was 

 kept practicall}' constant, and was intermediate between 

 the currents used in the two experiments with cold air. 



Thus the effect of temperature on the yield of acid is 

 very evident, and, if some means could be devised to 

 remove the products of oxidation still more quickly from 

 the flame, an increased yield of acid might result. That 

 the increased amperage in the flame exerts no direct effect 

 upon the rate of oxidation is shown by the above experi- 

 ments where the current is kept as constant as possible. 



At this juncture it was thought that it would be 

 interesting to determine the amount of nitric acid produced 

 in a given time by the low-tension electric discharge 



