37 



and that, while the gold is frequently contained in the slate CaSG 

 itself, it is often associated with copper ores. 



6980, 8921, and others are blue slate showing gold in a 

 very fine state of division, while 1388 and other iron-stained or 

 bleached slates show the same rock under the influence of 

 weathering. At times, as in 8923 from the Conqueror Mine 

 (100-ft. level) and 6568-9 from the Occidental Mine, the gold 

 occurs with quartz. 8929, 8930, Great Western Mine, Cobar, 

 show fine scales of native copper on the slate. 6570 and others 

 from the Chesney Mine, Cobar, show carbonates of copper. In 

 case 60 will be found a specimen (8938) from the Great Peak 

 Mine (120 ft.) showing chloride of silver. 



The occurrence of gold at Billagoe is very similar. 814 is a 

 bleached slate showing gold ; 5138, slate showing gold and 

 chloride of silver.* 



At Mount Drysdale the ore consists of slate, conglomerate, 

 &c., in which gold is sometimes freely visible. 1951, in case- 

 138, near the door, is a block of breccia from Drysdale in which 

 gold i3 very freely visible. 5420, clay-slate showing very fine 

 gold. 7669, very rich stone showing veins of gold traversing- 

 slate. 8974 shows antimonial silver ore on which is seated a 

 very pale variety of free gold. There is some superficial resem- 

 blance between the Drysdale stone and that from Pambula (case 

 56). The nature and origin of the two is, however, totally 

 dissimilar, the Pambula ore being wholly of igneous formation, 

 while that from Drysdale is wholly sedimentary, not being 

 associated with any igneous rocks whatever as far as known. 



8546, Florida Eun, blue slate and its weathered representa- 

 tive, showing gold and silver chloride. 



Mount Rope, Gilgunnia. — 6769 Mount Hope, and 9321 Mount 

 Allen, show free gold on red slate. In case 136, near the door, 

 is a block of ore from the May Day Claim, Gilgunnia, 168 tons of 

 which yielded 36G oz. of gold. 



-* Chloride and bromide of silver blacken very rapidly on exposure to light and the original 

 colour cannot be restored. For this reason 8938 is kept covered. In 5438 the silver rainerai 

 forms a greenish-black coating on the stone. 



