176 THE MINERALS OF NEW SOUTH WALES. 



Lead. 



Native Lead. 



The Rev. W. B. Clarke more than once mentions having found 

 native lead on the Peel River and elsewhere. 



Minium, or Native Red Lead. 

 Chem. comp. : Lead oxide = Pb 3 4 . Lead, 90 '66 ; oxygen, 

 9 '74= 100. Occurs with cerussite at Peelwood, near Tuena. 



Cerussite. 



Chem. comp.: Lead carbonate = PbC0 3 . Lead oxide, 83*5; 

 carbonic acid, 16*5 = 100. Occurs massive and in large prismatic 

 crystals at Peelwood Mine ; on the exterior they are often coloured 

 red by a ferruginous clay. Also found at Tuena in a red clay. 

 At Solferino. 



Anglesite. 



Chem. comp.: Lead sulphate = PbS0 4 . Lead oxide, 73*6; sul- 

 phuric acid, 364= 100. Said to have been found with galena on 

 the Abercrombie River. 



Pyromorphite. 



Chem. comp. : Lead phosphate = 3Pb 3 P 2 8 , PbCl. In round 

 numbers, lead oxide, 75-0; phosphoric acid, 15-0; lead chloride, 

 10 = 100. Small quantities of calcium fluoride and calcium 

 phosphate are usually present. 



At Grenfell, it is found as a bright green-coloured powder con- 

 taining minute hexagonal prisms ; it is also found of the same 

 colour associated with galena and mimetite in a vein traversing 

 clay slate, near Bathurst. Another specimen from Bathurst was of 

 a pale greyish-brown colour, with a waxy lustre, and mammillated 

 surface, upon which small crystals of chessylite were seated. 



It also occurs on the Sugar-loaf Hill, near Wellington ; also on 

 Mitchell's Creek, 



Mimetite. — Kampylite. 



Chem. comp. : Lead arseniate = 3Pb 3 As>0 8 , PbCl. In this mineral 

 the phosphoric is replaced by arsenic acid. Of a brown colour, and 

 in much-curved or barrel-shaped hexagonal prisms. With pyro- 

 morphite at Sugar-loaf Hill, Wellington. 



Wulfenite. 



Chem. comp. : Lead molybdate = PbM0 4 . Lead oxide, 61-5; 

 molybdic acid, 38-5 = 100. Mentioned as occurring on a spur of 

 Mount Murulla, Kingdon's Ponds, and near Mount Wingen. 

 Structure, radiate and waterworn. The Rev. W. B. Clarke also 

 records finding drifted molybdate of lead, on the North Shore. 



