MancJiester Mcuioirs, Vol. xliv. (1900), No. 115. 7 



the preliminary experiments, but cventuall)- it was found 

 that their interposition had a great effect upon the yield 

 of acid. The oxides of nitrogen appeared to dissolve more 

 readily after their addition, and, when water alone was 

 used for absorption, less than i per cent of the oxides 

 formed was found in the gases leaving the last tower. On 

 the other hand, when the bottles were not included in the 



Fig- 3- 



condensing arrangement, it was usual to find 2 to 3 per 

 cent of the oxides actually produced escaping with the 

 exit gases. This appears to confirm Lord Rayleigh's 

 view, that the gases on immediately leaving the flame are 

 not in a condition ready for absorption. Hence the 

 greater efficiency obtained by him on using large vessels 

 in which to produce and absorb the oxides of nitrogen. 

 With this apparatus it was found that an expenditure 



