PHYSIOGRAPHY. 115 



Carbonic-Acid. 



2. It was found at St. Agnes in Cornwall. 



3. From the inconsistency of the chemical results obtained above, with 

 :he known laws of chemical combination, it seems probable that some 

 nistake has been committed in the analysis. 



CARBONATE OF COPPER. (See Blue Malachite and 

 Green Malachite.) 



CARBONATE OF IRON. (See Spathic Iron.) 

 CARBONATE OF LEAD. (See White Lead-ore.) 

 CARBONATE OF LIME. (See Calcareous Spar.) 

 CARBONATE OF LIME AND MAGNESIA. (See Dolo- 

 mite.) 



CARBONATE OF MAGNESIA. (See Magnesite.) 

 CARBONATE OF MAGNESIA AND IRON. (See Rhomb 

 Spar.) 



CARBONATE OF MANGANESE. (See Diallogite.) 

 CARBONATE OF SODA. (See Natron and Trona.) 

 CARBONATE OF SODA AND LIME. (See Gay-Lussite.) 

 CARBONATE OF STRONTIAN. (See Strontianite.) 

 CARBONATE OF ZINC. (See Calamine.) 



CARBONIC-ACID. Aeriform Carbonic-Acid. 

 MOHS. 



Gaseous. Transparent. 



Sp. gr. =1*51961. BIOT and ARAGO. Taste slightly 

 acidulous ; pungent. 



1. It extinguishes burning bodies of all kinds, and is incapable of sup- 

 porting the respiration of animals. It reddens the vegetable blues ; but 

 the original color is restored by heating, or exposure to the air. Lime 

 and barytic-water, become turbid when brought into contact with it ; 

 and it is absorbed by recently boiled water at the common pressure and 

 temperature, in a quantity equal to the volume of the water. Under a 

 pressure of 36 atmospheres, carbonic acid becomes converted into a li- 

 quid. 



