i6 ACCOUNT of a MINERAL 



With Fluoric Acid. 



38. Scarcely any perceivable efFervefcence happens when 

 Strontian fpar is thrown into acid of fluor. It is brifk if the 

 artificial carbonate be ufed, but little is diflblved, as the fluate 

 falls to the bottom. Fluor acid occafions a milkinefs in Stronti- 

 tic water by the formation of a fluate, which is poflelled of 

 nearly the fame folubility as the preceding. 



With Phofphoric Acid. 



39. This acid attacks the fpar, though in a folid form, but 

 the progrefs of the efFervefcence and folution is exceflively flow. 

 A bit, weighing two or three grains, was not completely dilTol- 

 ved in twenty-four hours, though the difengagement of carbo- 

 nic acid went on without interruption. The folution continues 

 clear as long as the acid is conliderably in excefs ; but as foon 

 as the point of faturation approaches, it becomes thick, from 

 the depofition of a white powdery phofphate. When the acid 

 of phofphorus is dropped into Strontitic water, a precipitate ap- 

 pears, which is rediflblved when the acid comes to be redun- 

 dant. The phofphate, if perfedly neutral, has little folubility 

 in water. Ten grains of it, treated with four ounces of boil- 

 ing diflilled water, left a refiduum of nine grains. 



With Succinic Acid. 



40. The acid of amber, diflblved in water, aflaults, but with 

 no remarkable adivity, the artificial carbonate of Strontites. A 

 clear folution refults, which, by fpontaneous evaporation, yields 

 a cryftalline fuccinate, which is perfiftent in the air. 



^ With 



J 



