C 53 3 



6. COMMON SALT. 



A Compound of Muriatic Acid with Mine- 

 ral Alkali. 



Synonymous Names. 

 fSalt. 



I Sal gemmae. 

 I Sal marinum, 

 / Gem fait. 

 Sea or marine fait. 

 Culinary or kitchen fait* 

 ^Muriate of foda. 



This fait abounds in nature, in vaft maffes in 

 the earth ; diffolved in the water of the fea; and 

 in fait lakes ; and, therefore, very frequently met 

 with. Its cryftals are regular tubes ; it is de- 

 tected 



a. By adding vitriolic acid to the water con- 

 taining it, this unites with the mineral alkali of 

 the fa!:, and forms Glauber's fait, which remains 

 diffolved in the water; the muriatic acid is detach- 

 ed, and, being a volatile fubftance, may be ren- 

 dered vifible as the nitrous acid page 52. a. by 

 means of the vapour of volatile alkali held over 

 *it; the volatile alkali uniting with the muriatic 

 acid, forms fal ammoniac, which becomes vifible 

 in this very fine duft. 



b. By adding a folution of nitre of filver, a 

 white precipitate is immediately formed, which 

 fome time after will acquire a bluifh appearance, 

 and this precipitate will not be rediffolved by the 



addition 



6. COMMON 

 SALT. 



