SPIRIT OP NITROUS ETHER. 



149 



stores and the result shows that under such circumstances 

 decomposition begins at once and steadily continues. 



It was not considered necessarv^ to try samples kept under ex- 

 tremely unfavorable conditions as it is well known that expos- 

 ure to light, high temperature, and free access of air contribute 

 to rapid deterioration. 



Table 25. 



Deterioration of Samples of Szveet Spirit of Nitre Stored under 



Different Conditions. 



SAMPLE A. 



Date of Test. 



Elapsed 

 Time — Days. 



Corrected 

 Reading^ — C. C. 



Ethyl nitrite. 

 Per Cent. 



Deterioration. 

 Per Cent. 



Jime 3 



June 16 



July 17 



August 3 . . . 

 August 18 . . 

 September 1 



March 19 . . . 

 March 27 . . . 



April 30 



May 28 



September 1 



March 16 . . . 

 March 27 . . . 



April 30 



August 4 . . . 

 August 18 . . 

 September 2 



13 



44 

 61 

 76 

 90 



55.9 

 55.9 

 55.8 

 55.8 

 54.6 

 52.7 



4.06 

 4.06 

 4.06 

 4.06 

 3.97 

 3.83 



0.00 

 0.00 

 0.00 

 0.09 

 0.23 



SAMPLE B. 



SAMPLE C. 



In Table 25 the first readings under samples B and C, 4.21 

 per cent and 3.86 per cent, may possibly be slightly high 

 because these two samples, made from tubes of concentrated 

 nitrous ether, were among the first investigated and it was 



