72 Daniell on the Nature of the Products 



ducts of the decomposition were received over mercury. The 

 quantity of gaseous matter, with all corrections made, amounted 

 to 7.37 cubic inches. Upon examining the oxide of copper 

 after the operation, it appeared that some of the carbon had 

 escaped decomposition. It was, therefore, again triturated and 

 mixed in a mortar, and returned into the tube. A further 

 quantity of gas was thus obtained, amounting to 0.32 cubic 

 inch. This added to the former produce, made the whole 

 7.69 cubic inches. This gaseous matter could not be fired with 

 hydrogen, and produced no change in nitric oxide. Lime water 

 was copiously precipitated by it. After these preliminary trials 

 it was found that 6.23 cubic inches were absorbed by potash ; 

 and the residue, 1.46 cubic inch, possessed all the negative pro- 

 perties of azote. Thus the calculated results of the analysis 

 stand 



Grs. 



6.23 inches carbonic acid r= 0.79 carbon 

 1.46 ditto azote , . . = 0.43 azote 



Loss ... rr 0.38 hydrogen 



1.60 

 Now, the nearest definite proportions to these would be 



Grs. 



0.75 carbon 

 0.43 azote 

 0.34 hydrogen 



1.52 



Or upon the scale of equivalents, 



4 proportions carbon 3.00 



1 ditto azote L75 



11 hydrogen 1.37 



Which are further equivalent to 



4 proportions of sub-carburetted hydrogen, 4.00 

 1 proportion of ammonia 2.12 



