94 



A. LIVERSIDGE. 



BOLEITE, NANTOKITE, KERARGYRITE, and CUPRITE 

 from BROKEN HILL, N. S. WALES. 



By A. LlVERSIDGE, M.A., F.R.S., 



Professor of Chemistry in the University of Sydney. 

 [With Plate II.] 



[Read before the Royal Society of N. 8. Wales, June 6, 1894.2 



The first of these minerals was sent to me by Mr. J. R. McKay, 

 manager of the Broken Hill South Mine, on February 28th last, 

 for identification with a request to make a confirmatory analysis. 

 Accompanying the letter was an analysis of the mineral by Messrs. 

 A. D. Carmichael and J. O. Armstrong ; the composition, as found 

 by them, agrees so closely with that of boleite (a variety of 

 percylite) that I thought it would be a pity to use any more of 

 the small specimen for the purpose of a second analysis. It was 

 however necessary to determine the amount of water, the specific 

 gravity etc. 



Analysis of Mineral by Messrs. Carmichael 

 and Armstrong. 



Boleite by MM. Mallard and Cumenge. 



Silver 



Lead 



Copper 



Chlorine ... 



Oxyg-en (calculated) 

 Water (calculated) 



8-257 Q 

 47-20 

 19-20 

 1350 



re-io] 



[5-44J 



99"69°/ 



33-67 

 55-02 

 10-95 



Cubic crystals. 

 1 2 



8-85 8-70 

 48-45 49-75 

 1395 14-50 

 19-98 19-00 



[4-00] [4-05] 

 477 4-00 



Octahedral crystals. 

 3 



9-4 

 50-7 

 150 

 19-7 



> undetermined 





100-00 100-00 





Copper oxy chloride 



Lead oxychloride 



Silver chloride 







I have since determined the amount of water and found it to 

 be 6*39 per cent. 



The combined water was determined on # 3253 gram, of the 

 mineral, this being the largest amount at my disposal. It was 



