ON FLUOR 



11 



SECTION XVIII. WITH ALKALIES. 



I melted one part of fluor with four parts of caustic- 

 fixed alkali in a crucible, upon which I afterwards poured 

 water, in order to dissolve all the soluble parts. I found 

 the alkali had not in the least united with the fluor; this 

 latter remaining unchanged after the water had dissolved 

 the alkali. 



SECTION XIX. 



I melted one part of powdered fluor with four parts of 

 aerated fixed alkali, and then poured water upon it, which 

 dissolved all that was soluble; there remained at the 

 bottom calcareous earth, which effervesced with acids. The 

 liquor before mentioned was evaporated, and contained fixed 

 alkali united with fluor acid, which remained dry in the 

 air. 



SECTION XX. WITH NEUTRAL SALTS. 



I distilled one part of powdered fluor with two parts 

 of muriated volatile alkali (sal ammoniac). At first, caustic 

 volatile alkali passed over, then sal ammoniac, at last yellow 

 flowers, which attached themselves to the internal surface of 

 the vessel with the sal ammoniac. The residuum in the 

 retort was fluor unchanged. 



The iron contained in the fluor was most probably the 

 cause of the small decomposition of the sal ammoniac which 

 took place at first. 



