92 



Mine, tlie crystals (which were about one quarter-inch long) 

 being carefully separated from the matrix. The analysis of this 

 specimen yielded the following result (i.). For the sake of 

 comparison I subjoin the analysis of a specimen from Chili 

 (ii.) quoted by Dana — 



I. II. 



Copper 13 73 1454 



Chlorine 1538 16-33 



Cupric oxide ... ... 5591 55"94 



Water ... 13-51 (by diff.) 1296 



Insoluble silicious residue 1-47 '08 (quartz?) 



100-00 99-85 



It occurs also at the Tudanamutana, Daly and Ehondda 

 Mines. From the latter — situated near Moockra Tower — I 

 have obtained pseudomorphs after cuprite. 



SILVER. 

 Although silver occurs in considerable quantity in some of 

 the lead ores of the colony, so far as I am aware no isolated 

 species containing this metal as an essential constituent has 

 yet been discovered. 



GOLD. 



" The geological distribution of gold in South Australia is 

 restricted to the Pre-Silurian, certain gravels of the Miocene 

 period, and to drifts of later age. In the first it occurs dis- 

 seminated in veins of quartz ; in the second and third cases as 

 alluvial gold." (Tate). . 



Among the numerous localities in which gold has been found, 

 in one or other of the conditions mentioned above, the follow- 

 ing may be named : — In the sand of the Onkaparinga, South 

 Para and Torreus Rivers ; in the Bremer and Barossa Eanges ; 

 at Nairne, Woodside, Strathalbyn, Mount Barker, Clarendon, 

 JS^oarlunga, Currency Creek, Mount Pleasant, Jupiter Creek and 

 Echunga in the Adelaide District ; Ulooloo and Waukaringa, 

 North of Burra. At Bigg's Plat near Echunga a few nuggets of 

 an ounce in weight have been obtained. 



At the Baihaunah Mine gold occurs associated with native 

 bismuth and bismuthinite ; at the Lady Alice Mine it has been 

 found in some abundance, associated with bornite ; and at the 

 Moonta Mine it also occurs in small quantity associated with 

 the latter mineral. 



In the Northern Territory gold is widely distributed over 

 that portion of Arnheim Land occupied by metamorphic rocks. 

 The gold-fields extend from the Eiver Stapleton to the Drifiield, 

 a distance of about a hundred miles. The chief centres of 



