836 7. Parkman on action of Sulphur and Phosphorus 
red in the same manner as the corresponding sulphid of copper. The 
substance obtained was a black powder. It was ignited with nitreand 
carbonate of soda, and the oxyd of copper separated from the melted 
mass by dissolving in water. This method is not to be recommended, — 
copper. separ. te the em, the er was Pacers a pe = 
foe to bring all the Sistine into the aaa state, and ee dissolved 
out with nitric acid and precipitated by caustic potash. better _ 
0°9498 grm. substance gave 0°3818 oxyd of copper. 
Calculated. Found. 
Cu, $1°7 33°12 32°09 
Te, 64: 66°88 
95°7 100°00 
Precipitated tellurium, boiled half an hour with paises of lead and 
tate of the protoxyd of i iron, did not combine with any le 
V. Action of Phosphorus on the solutions of Copper, Silver and Lead. 
1. Without the presence of reba agents.—The action of gts 
on solutions of copper has already been observed by Back, Vogel and 
Beeticher, and I have but little new to add to their observations. dn 
Phosphor us, placed in a boiling solution of sulphate of copper, 
at first metallic copper, but this gradually blackened and by con ntinued 
e substance obtained was a black pow the ne particles os possess 
ing rsohacerabis lustre. Under the lens it appeared to be perfectly ho 
mogeneous. Even when finely pulverized, not a trace of metallic coppet 
could caf seen. Heated on reso foil, here and there a very slight . 
flame was observed for two or three seconds. The quantity of pte ter 
phoras howe, if there was any Sia must have been extremely — 
aco analysis, a portion was dissolved in hydrochloric acid, with af 
aid of chlorate of potash, the solution heated until it no longer sme 
of chlorine, diluted, and the copper precipitated by sulphuretted pe 
gen. trate was saturated with ammonia, and the phosphoric 20! 
Precipitated by sulphate of magnesia (mixed with chlorid of ers 
in sufficient quantity to prevent its precipitation by ammonia). . 
= hee ore was dissolved in fuming nitric acid and the oxyd precip 
0°6695 grm. s itetance gave 0°7301 oxyd of copper and 02916 = 
phate of ammonia-magnesia, 
a 
7Cu, 221°9 “ST: ote 4 ‘87-06 
Ry 31° 12°26 12°16 
252°9 100°00 . 99°22 
