ANALYSIS OP OLEFIANT QA9. ^1 



Dr. Henry has made known the gaseous products of the Dr. Henry, 

 slow corubustion of the defiant gas in an apparatus of his 

 invention, which exposes the operator to no danger 

 from the breaking of the vesels*; but from his results he 

 has not deduced the consequences, that might be drawn, 

 respecting the analysis of this gas. I shall exhibit them 

 here, following the data of the English chemist. 



I proceed to the results, which I have obtained in re- '^^'^^"'^'^'^'^ 

 . ,, , . experiments. 



peatmg all these experiments. 



The oletiant gas was prepared by mixing pure alcohol Modeotpre- 

 with sulphuric acid in the proportions mentioned above. ^ ^ ^ 

 1 interrupted the distillation before the white vapours, pro- 

 duced by the presence of sulphurous acid, were abundant. 

 This sulphurous acid, which was in part in the state of gas, 

 was absorbed by liquid ammonia. \ 



When 1 weighed the olefiant gas, the barometer was at 

 0*71893 [28*28 in.]. The thermometer attached to the 

 barometer was at 3*75* [38*75° F.], and the temperature 

 of the gas was the same. 



The capacity of the receiver was 3527*8 cubic cent. 

 [214*83 cub. in.]. 



The mercurial gage, in the receiver exhausted of air, 

 stood at 3*5 mil. [1*38 line]. The difference of weight be- 

 tween the empty receiver, and the receiver filled with the 

 olefiant gas at the extreme of moisture wus 4*147 gr. 

 [64*068 grs] without any correction. 



The difference of weight of the receiver when empty and 

 when full of atmospheric air, under the same circumstances, 

 was 4*21 gr. [65*026 grs], 



♦ Bibl. Brit. vol. XLI, p. 324. [See Phil. Trans, for 1808, p. 282j 

 or Journal, vol. XXII, p. 83, for the original.] 



■f On comparing what follows here with Dr. Henry's Paper, it ap- 

 pears, that the French translator has made several mistakes with re- 

 gard to the fiefures, by which Mr. deSaussure has been misled. What 

 he says therefore does i>ot apply ; and, as of course it would be useless, 

 it is omitted. C, 



Hence 



