28Q Proceedings of the Asiatic Society. [Sept. 



The analysis of the sample first sent by him on 24th July having 

 been unsatisfactory on one point, and the specimen having been 

 exhausted, I wrote to Mr. O'Eiley for another sample, in order 

 to settle this point. In reply ho said that he had only a small 

 specimen left, but sent me another small piece from the same range 

 of hills, bearing a strong resemblance to the first, which he thought 

 might probably be the same. I have no information of the locality 

 whence they were got : Mr. O'Eiley 's letters were all dated from 

 Shoaygyeen, except one in February 1864, from the Karen country. 

 In a subsequent letter, he mentioned that the samples referred to 

 were from the same range of hills as a sample of ore he was then 

 sending me, which turned out to be a double sulphide of copper 

 and iron. This is all the information I can give of their source, 

 as some time afterwards Mr. O'Eiley died. 



The following is the result of my analysis of the first sample sent 

 on 24th July. 



Copper, 17-000 



Silver, '096 



Iron, , 36470 



Antimony, 1*150 



Arsenic, 32-700 



Sulphur, 1-360 



Deficiency and loss, .\ 10-624 



Earthy matter, -560 



Total, 100000 



The silver is equal to 31 £ ounces, troy, per ton. 



The unsatisfactory point which I wished to clear up was the 

 deficiency of 10-624, which I supposed might be oxygen combined 

 with the metals. But this did not appear a very probable solution 

 of the difficulty, and it might rather be owing to errors in analysis. 

 The determinations had all been carefully made according to the 

 usual methods. The arsenic and antimony were separated from the 

 other metals by Hydrosulphate of Soda, and the arsenic determined 

 as Arsenate of Magnesia and Ammonia, and there was no reason to 

 doubt the correctness of the process. But I had some fear that 

 i)< nic might have been lost during the operations preparatory to 



