OK THE QUANTITY OF CARBON IN CARBONIC ACID. OO5 



the shape of the pieces of charcoal, and weighing only *02 Left -02 gr. of 

 of a grain. On observing the register of No. I, it indicated whlte ashes * 

 exactly the quantity of gas that we began with, so that al- Thevolumcof 

 though 3*98 grains of charcoal had been dissolved, the vo- gas unaltered* 

 lurae of gas was unaltered by it; a circumstance which had 

 been remarked before by Lavoisier. Tke small receiver 11 

 was now nearly full of mercury ; the communication with 

 the gasometer being opened, the large glass receiver was gen- 

 tly pressed upon, until several cubic inches were forced 

 through the receiver II, and tube K, in order to clear the 

 latter of common air. This being done, on trying our gas 

 with the eudiometer and limevvater, 56 parts were absorbed 

 out of 100. These of course were carbonic acid gas; the test 

 for oxigen absorbed 4-1, and a residuum of 3 was left, which 

 was exactly what we began with. This is a striking proof, that Nothing pro- 

 jiMhing but carbonic acid was produced in the experiment. jj uc ? d b ?j car " 



.100: 56:: 52-03: 29-13. 

 Then 29*13 cubic inches of carbonic acid gas were produced. 2913 cub. 

 100 : 47*26 : : 29'13 : 1376\ incbe *» 



These 29*13 cubic inches of carbonic acid gas would there- weighing 

 fore weigh 1376 grains. 13 ' 76 S IS - 



The charcoal weighed 4 grains. 

 The residual white ash 0*02 



Charcoal consumed • • 3*98 grains. 



Then if 13 76 grains, the weight of the carbonic acid produced, 

 contain 3*98 of charcoal, 100 grains must contain 28*92. 



1376: 3'98:: 100: 28-92. 



Then, according to this experiment, 100 grains of carbonic 

 acid gas contain 28 '92 charcoal. 



The gas before the experiment consisted of 



Oxigen .50*47 cubic inches. 

 Azote* • l'5() 



u 



5203 

 Voi>. XIX— March, 1808. Q After 



