[ 85 3 



Synonymous Namesf, 

 f Vitiated air. 

 j Impure air. 

 AZOTIC GAS, < Phlogifticated air. 



j Phlogifticated gas. 

 Atmofpheric mephitis. 



Is compofed of caloric, or heat, and a particu- 

 lar bafe, capable of becoming folid, called azote. 

 This fubftance, united to different bafes, forms al- 

 kalies, and may be confidered as a real alkalizen, 

 or alkalizing principle, in oppofition to oxygen, 

 which is the principle of acidity. The atmo- 

 fphere, therefore, is an immenfe refervoir of the 

 principles of acidity and alkalefcency, without 

 being itfelf either acid or alkali. 



Azotic gas may be obtained by expofmg cer- 

 tain fubftances to atmofpheric air, which abforb 

 its oxygen ; as ammonia, or the volatile alkali, 

 which is compofed of azote, united with hydro- 

 gen. 



Synonymous Names* 

 f Fixed air. 

 CARBONIC J Solid air of Hali. 



ACID GAS, < ^ ret f ceoUS aCld § as - 

 | Mephitic gas. 



^ Aerial acid. 



Is the heavieft of the aerial fluids, being compof- 

 ed of carbon or charcoal, and vital air or oxygen, 

 forming carbonic acid. It is combined with cal- 

 careous 



