87 



Sulphide of bismuth, lead and silver. This mineral has been Case 70 

 found in small quantities with quartz and copper pyrites at cosalite 

 Duckmaloi, Assays of 1| oz. of gold and SCO oz. of silver per 

 ton have been obtained. 



Compounds with tellurium are described under Tellurium. 



MOLYBDENUM. 



Ores of molybdenum are used in the preparation of certain 

 classes of steel and in the calico and porcelain industries. The 

 value fluctuates, but is at present (1901.) very high. The ores 

 are found in granitic rocks for the most part, but occasionally 

 in quartz. 



A pretty sulphur -yellow mineral. Whipstick and Nambucca Molytdic 

 River. Ochre. 



A soft bluish flaky mineral, distinguished from plumbago by Molybdenite, 

 the greenish tint of its streak. It occurs at Kiugsgate, Bolivia, 

 and many other localities. *" 



9009, Kingsgate : good crystals. 



MANGANESE. 



Black oxide of manganese {wad and psilomelane) is of very 

 common occurrence. Such ores are used in the manufacture of 

 steel and the preparation of chlorine.* Numerous samples are 

 exhibited, but it does not follow that they represent workabla- 

 deposits. 



Moonbi, Kempsey, Armidale, TTralla, Nymboida, Bendemeer,, 

 Walcha, Tamworth, Gulgong, Mudgee, Glanmire, Cobar, Cooyal, 

 Peak Hill District, "Woodstock, Rockley, Eugowra, Caloola, 

 Tumut, Queanbeyan, Cooma, Gundagai. 



5265, Bendemeer : contains 93 per cent, of binoxide of 

 manganese. 



* For the preparation of chlorine — used in tlie chlorination of ffold ores — it is the binoxidf. 

 of manganese only that is useful. The amount of binoxide present can only be ascertained 

 by direct determination. 



K 



