BY "SV. F. PETTERD, C.M.Z.S. 53 



gives off much smoke, at the sam.e time emitting a strong, 

 resinous, aromatic odour. A sample was submitted to Pro- 

 fessor Krause, late of the Ballarat School of Mines, who 

 stated that it comes near a fossil resin known as middle- 

 tonite, and that a similar substance has occurred in coal 

 in Victoria. It is found in lumps which vary in size from 

 extremely small to, in rare instances, masses weighing a 

 few pounds. It occurs impregnating beds of lignite at 

 Macquarie Harbour. 



A fine large mass of a similar substance was obtained 

 from alluvial tin workings at Cape Barren Island. It has 

 also occurred with lignite and slate (containing leaf impres- 

 sions) at the old Don Tin Mine at Mt. Bischoff, and also, 

 with lignite, near Evandale Junction. 



89. CoPiAPiTE (Yellniv Sulfhate of Iroti ). 



This sulphate occurs in limited quantity, as a result of 

 the alteration of melanterite, in the old levels at the Mt. 

 Bischoff and other mines. It is commonly found as an 

 incrustation in melanterite, being a transmutation of that 

 mineral by loss of water. Cabinet specimens of pyrites 

 often decompose to this and other sulphates. In the 

 vicinity of Barn Bluff much of the schist rock of the 

 locality is more or less impregnated with decomposable 

 pyrites which soon alters to the sulphate. 



90. Copper, Native. 



The native metal is cubic and holosymmetric. The 

 crystals are commonly much elongated, and occur in more 

 or less crystallised groups. It is plentiful at several 

 localities on the West Coast. At Mt. Lyell and vicinity 

 it has been found in considerable abundance, individual 

 specimens often weighing several pounds, and in extreme 

 instances reaching to as much as from 70 to 80 lbs. At 

 the Lyell Blocks Mine it has been mined on the large scale. 

 At this mine it occurs embedded in a fossiliferous litho- 

 margic clay of various tints. It is occasionally auriferous 

 at this locality. At Mt. Bischoff a highly-polished native 

 copper foil of extreme tenuity has been obtained coating 

 the cleavage faces of the killas or metamorphic slate, near 

 its junction with the porphyry dykes. At the Montagu 

 and Duck Rivers this metal occurs as small lumps and filmy 

 scales, irregularly dispersed throughout a dark-coloured 

 igneous rock (diabase ?) ; also at Birch's Inlet, on Mac- 

 quarie Harbour, under the same conditions. It occurs 



