mineral Substance, called Strontionite. 421 
EXPERIMENT X. 
The remaining liquid of the foregoing experiment was 
mixed with sulphuric acid, until no more precipitate took 
place, the remaining filtered liquor was saturated with purified 
pot-ash, and no earth was separated or discovered. 
EXPERIMENT XI. 
A certain quantity of the powdered substance was dissolved, 
and saturated with nitric acid, and evaporated ; it then crys- 
tallized ; the crystals were permanent in air, did not deliquesce, 
and exhibited triangular and sexangular plates. 
EXPERIMENT XII. 
When dissolved and saturated with muriatic acid, it exhi- 
bited on evaporation long six-sided prismatic crystals, which 
have the broad alternating with the narrow sides, terminating 
in obtuse trihedral pyramids ; this was observed by Dr. Craw- 
ford, who also found that the salt formed of the substance with 
adds dissolved in water, produced five times more cold than the 
salt from the barytes in the same acid ; that the salt formed by 
marine acid and this substance, was much more soluble in warm 
water than in cold, whilst the muriat of barytes is nearly as soluble 
in cold as in warm water; that one ounce of distilled water dis- 
solves three times as much of the muriat of Strontionite as the mu- 
riat of barytes, which makes a distinction between the basis of this 
substance and the barytes . 
EXPERIMENT XIII. 
Nitric acid added to the solution of that substance in mu- 
riatic acid, occasioned a decomposition. 
