ON THE QUANTITY OF CARBON IN CARBONIC ACID. ggg 



The volume of gas at the mean was therefore 51*20 cubic 

 inches. 



100 : 57'50 : : 51*20 : 29*44. 



Then 20*44 cubic inches of carbonic acid gas were produced. Produced 



° 2944 cub. in. 



100 : 47*26 :: 29*44 : 13*91. of carbonic acid 



13*91 :4*01 :: 100:28*82. guS 



Then, according: to this experiment, 100 grains of carbonic containing 



• , • <J ™ j f -2882 of dia. 



acid contain 28*82 diamond. niond , 



Calculation by Oxigen. 



100 : 33 '82 : : 29*44 : 9*95 grains of oxigen consumed 



4*01 of diamond 



13*96 

 Calculation bv carbonic acid 13*9 1 



•05 diff. 



13'96:4*01 :: 100 :28*72. 



Then, calculating by the weight of oxigen employed, 100 or,fromoxr- 

 grains of carbonic acid contain 28'72 diamond. g 2 e 872 0nSUm 



The precipitate in lime water from the gas produced in the Appeared to 

 combustion of diamond appeared to us denser than that occasion a den- 

 from the combustion of charcoal. ii/limewater, 



In order to see how far the weight of the precipitate of than that from 

 carbonate of lime would agree with the results of the fore- 

 going experiments, we drew off 20*5 cubic inches of the gas, 

 which had been thus altered by the combustion of diamond 

 in the last experiment, by the register H, and received it in 

 bottles over mercury ; then admitting lime water, we obtained 

 a copious precipitate of carbonate of lime, which, being 

 dried at the temperature of 212° Fahrenheit, weighed 12 

 grains. 



But as the 20*5 cubic inches require the same corrections 

 to bring them to the mean' temperature and pressure ; we 

 say, as the actual volume of all the gas is to its correction, 

 so is the quantity drawn off to that which it would have been 

 at the mean : 



49*84 : 51*20 : : 20*50 : 21-06, the volume after the correc- 

 tions were made. 



Then, 



