on solutions of the Metals. +829 
_ sulphate of copper, boiled together, gave sulphid of copper rapidly. Sul- 
Pi phur, zinc and sulphate of copper, boiled together, gave, along with re- 
duced copper, black sulphid. 
_ Sulphur, boiled with acetate of lead and acetate of the protoxyd of 
tron, became rapidly black and was apparently completely converted into 
sulphid. The resulting sulphid contained no iron. 
Without separation of ’ sulphur. The analyses of the copper compounds 
Were made, in some cases, by precipitating the oxyd of copper, at the 
sulphuric acid from the filtrate, 
2 iling point, by caustic potash, and 
ri 
Sulphid of copper prepared by boiling sulphur with acetate of copper. 
Ist preparation. 0°6946 grm. substance gave 0-2817 oxyd of copper and 
26436 sulphate of baryta. 
2d preparation. 0°3255 grm. substance gave 0°1479 oxyd of copper and 
1-2938 sulphate of baryta. . 
| I. 1, 
| Cu, 32°37 36°28 
, 8, 52°27 54:56 
84-64 90°84 
Sulphid of copper obtained by the aid of sulphurous acid. 
| 0 
lst preparation. I. 1-9560 grms. substance gave 1°3145 oxyd of copper. 
| "TE 17321 grms. substance gave 11615 oxyd of copper. 
| . Ill. 0-6727 grm. substance gave 2°0356 sulphate of ba- 
Ax. Jour. Sct.—Sscowp Senms, Vor. XXXTI, No. 99,—Mar, 1862 
42 
