204 SULPHURETS. 



being kept red hot in the open air. From an 

 experiment of Vauquelin, there is reason to 

 consider this as a similar sulphuret with the pre- 

 ceding. He found it a compound of 4 parts 

 rhodium and 1 sulphur. Now, this is nearly 1 

 atom of rhodium + | atom of sulphur. 

 Palladium, ^5. Sulphuret of palladium. This sulphuret 

 is easily formed by heating together palladium 

 and sulphur, or by passing a current of sul- 

 phuretted hydrogen gas through a solution of 

 palladium. The sulphuret is greyish white, 

 possesses the metallic lustre, and is a compound 

 of 



1 atom palladium . 7 



1 atom sulphuret . 2 



Uranium, %6. Sulphuret of uranium. I have made no 

 experiments on this sulphuret. It was obtained 

 by Rose, by passing a current of bisulphuret 

 of carbon, in the state of vapour, over protoxide 

 of uranium, heated to redness in a porcelain tube. 

 It was black, and when rubbed by a hard body 

 it assumed the metallic lustre. It has not been 

 analyzed ; but is probably a compound of 



1 atom uranium 26 



1 atom sulphur 2 



28 

 1G 



