ANALYSIS OF FLUOR-SPAR. II 



lently heated, contains 43 per cent, of lime. Of 

 consequence, the whole quantity of lime in 156.6 

 grains of sulphate is 67.34 grains. This is obvi- 

 ously the whole lime contained in 100 grains of 

 fluor-spar ; and since that mineral contains no sen- 

 sible portion of water, the remainder of the 100 

 must be fluoric acid. Hence fluate of lime is 

 composed of, 



Lime - - 67*34 

 Fluoric acid - , 32.66 



100.00 



This result differs very materially from the ana- 

 lysis alluded to in the beginning of this paper, 

 which makes the amount of the acid in the same 

 weight of spar, only 16 grains, and the lime 57 

 grains ; the remaining 27 grains being considered as 

 water. But, from the care with which my expe- 

 riment was conducted, I flatter myself that the 

 result which it exhibits is very near the truth # „ 



* Since the preceding paper was read, I have 

 seen an analysis of fluor-spar by Klaproth, in the 4th 

 volume of his Beitrage, conducted in a very different 

 manner from mine, but leading to almost the very same 

 result. He found fluate of lime composed of 67^ lime, 

 and 32J acid, — quantities which coincide with mine., 

 within leas than 1 per cent.— ^~jyb?/. 1809. 



