H. Wurtz Contributions to Analytical Chemisiry. 383 
of the air. The residue, which crystallized just as before, as a 
Tadiating fibrous mass, was deliquescent, and gave with' water a 
clear yellow solution, leaving behind a very little metallic gold 
asa brown powder. This trace of metallic gold was the only 
evidence of decomposition that could be obtained, as the solu- 
_ tion gave only doubtful indications of the presence of nitric 
acid. In fact, even if the decomposition had been considerable, 
ho distinct evidence of nitric acid in the residue could be ex- 
pected, for, according to Vauquelin and Pelletier,* solutions of 
; the nitrate of teroxyd of gold leave on evaporation a mixture 
Fi ee of gold ‘ud, 
4 heated with nitric acid, evolves chlorine and nitric oxyd and 
vaio stannic acid.” J have experimented only with the pro- 
face of either nitric acid or chlorine. It gave the reddish 
. brown precipitate with nitrate of silver which is characteristic 
Of arsenic acid. 
ese Antimony.—Terchlorid of antimony, according to A. 
1 ogel,§ “evolves with hot nitric acid, chlorine gas, whilst a 
_ White powder (antimonie acid) previp ieee _ The residue left on 
: boiling the terchlorid with nitric acid of 1°29 sp. gr., and evapo- 
iting, was treated with dilute sulphuric acid, which partially 
dissolved it, the solution containing both chlorine and nitric acid 
_ ™ considerable quantities. The undissolved portion, consisting 
: undoubtedly chiefly of antimonic acid, was washed for a long 
. = ch, iii Ibid., iii, 738. 
¢ vias ane Ibid., ii, 786. 
