[ ^93 ] 



^ C H A P. 11. 



ILLUSTRATION OF THE PROPORTION OF INGREDIENTS 

 IN VITRIOLIC NEUTRAL SALTS. 



Before I treat of thefe falts it will be proper to notice the ftatc 

 of each of their bafes. 



Of Vegetable Alkali or Tartarin. 



This alkali may be obtained in three ftates, the fully aerated 

 and cryftalHzed, the imperfedly aerated or common mild tartarin, 

 and the cauftic, which may alfo by particular proceffes be cryftal- 

 lized. 



The fully aerated and cryftallized contains, by Mr. Pelletier, 

 41 per cent, of alkali, 43 fixed air, and 16 water, 15 An. Chym. 

 note, however, that even the cryftallized is not always fully aerated, 

 I. Bergman, 16, 17. 



Common dry fait of tartar contains about 60 per cent, of alkali, 

 28 or 30 of fixed air, with a few grains of Silex, vitriolated tarta- 

 rin and argill j common pot-afh generally contains alfo fome grains 

 of vitriolated and muriated tartarin. 



Vol. VII. Bb Seaion iji. 



