ON FLUOR 19 



the addition of alkali, it was decomposed, and the calx 

 precipitated. 



(g) Tin was not soluble ; but the calx was easily dis- 

 solved ; the solution became gelatinous ; it had a nauseous 

 taste. 



(h) Bismuth was not dissolved ; but its calx was dissolved 

 by the acid, with the very same phenomena as the calx of 

 lead. 



(i) Zinc produced the same effects as iron with the fluor 

 acid, excepting that the solution seemed to be more inclined 

 to crystallise. 



(k) The regulus of cobalt was not soluble ; but its calx 

 dissolved and formed a yellow gelatinous matter. 



(I) The regulus of antimony was not attacked ; neither 

 was powdered crude antimony (antimvnwm sulphuratum) 

 sensibly dissolved. 



SECTION XXXII. WITH SOLUTIONS OF SALTS. 



(a) Fluor acid precipitated something from a solution of 

 silver. The small quantity of precipitate, thus obtained, 

 neither melted nor evaporated under the blowpipe. 



(b) Quicksilver, dissolved in nitrous acid, yielded pre- 

 cipitate, which melted upon the charcoal under the blow- 

 pipe, and was afterwards evaporated. The solution of 

 corrosive sublimate was not changed by the fluor acid. 



(c) The solution of lead in nitrous acid was not 

 changed; but, from the solution of this metal in vinegar, 

 all the lead was precipitated by the fluor acid. Upon 

 adding more of this acid than was necessary for precipitat- 

 ing the calx of lead, the calx was dissolved, and found to 

 be soluble afterwards in distilled vinegar. 



