on solutions of the Metals. 331 
___ It will be seen that, in the analyses of the above substances, two prep- 
_ rations excepted, there is a large loss, if the substances be 
Calculated. Found. 
Cu, 31°7 36°15 36°28 
O, ; 9-12 
38, 48° 54:73 54:56 
88-7 100-00 
_ This formula is an improbable one, and I regret that I had not the 
time to investigate the subject further. 
The analyses of the other sulphids did not correspond to any formula, 
When carefully examined under a lens, the copper compounds appeared 
fo contain two substances. At first they ng to be simply composed 
aking 
geneous, 
Iphids are forming by boil- 
pposed tha 
= th : 
‘What doubtful. After boiling sulphur a long time with solutions of ace- 
a of copper and nitrate of silver, ; 
trates were tested: for sulphuric acid. Tn the 
9, The oxysulphids already descri ZnO, ZnS, CoO, CoS, and MnO, MnS, 
described sree st ayy Bouquet and Cloez (N. Ann. de 
i y-ore, SbO%, 2SbS3, 
uch lance to the 
