57 



8578, Wallah Wallah Mine, is Eomewhat similar to the pre- CaSG 62. 

 ceding: it consists p£ elongated, slightly tapering crystals. 



7583, case 127 Junction Mine, Broken Hill ; a massive 

 botryoidal form. 



Phosgenite, chloride and carbonate of lead : a rare mineral. 



7586, Broken Hill. 



Mimetite, arseniate and chloride of lead : a mineral closely 

 resembling pyromorphite, but containing arsenic in place of 

 phosphorus. Some small specimens from Broken Hill are 

 exhibited. 



Crccoisite, chromate of lead : one inferior specimen, believed 

 to have been found in New South Wales.* 



Vanadinate of lead — 1226, Consols Mine, Broken Hill : an 

 earthy specimen. 



Wulfenite, molybdate of lead : a beautiful mineral, generally 

 ■of a brownish-red colour.f Several specimens from the Prp- 

 prietary Mine, Broken Hill, are exhibited. 



8225, Wyalong : contains specks of a mineral that may be 

 wulfenite. 



SfoJzife, tungstate of lead: a rare lead mineral found at the 

 Proprietary Mine, Broken Hill. A massive form of stolzite, 

 associated with scheelite, occurs at Cordillera Hill, Mount 

 Costigan. 



Tungstate of lead is a striking instance of the same chemical compound 

 crystallising in different iovms— polymorphism. It is difficult at 

 first to realise that the varieties of stolzite exhibited here all have 

 the same chemical composition. 



5905, 5929, 6484: claret-coloured, pyramidal. 



5517 : ash-coloured ; the crystals have the form of an elongated 

 square prism terminated by a flat four-faced pyramid. 



5513, similar in appearance to the foregoing, only the prism is 

 short, giving the crystal a nail-head aspect. 



* Magnificent crocoisite from Tasmania will be found in case 90. ~ 



t Hone3'-yello-w crystals, from Arizona, will be found in case 82. 



