CARBON. 139 



Carbonic acid 2-?5 



Potash 6 



8-75 



And carbonate of lime of 



Carbonic acid 2-?5 



Lime 3-5 



6-25 



The carbonic acid was separated from this car- 

 bonate, and an atom of muriatic acid, weighing 

 4'6&5, was substituted in its place forming mu- 

 riate of lime, composed of 



Muriatic acid 4*625 

 Lime 3-5 



8-125 



The 3*5 lime and the 2*7<5 carbonic acid united 

 together, and formed 6*25 carbonate of lime. 

 In the same way, the 6 potash and the 4'625 

 muriatic acid united together ; and these respec- 

 tive quantities of acid and base exactly neutral- 

 ized each other : for both the carbonate of lime 

 and the muriate of potash were perfectly neu- 

 tral. It is clear from this experiment, that the 

 atomic weight of carbonic acid is just 2'75. 



3. Two facts of great importance have been as- 

 certained by the preceding experiments ; name- 

 ly, 1. That an atom of carbonic acid weighs 

 2*75. 2. That 100 grains of pure carbonate of 

 lime contain exactly 44 grains of carbonic acid. 



