THE MINERALS OF NEW SOUTH WALES. 189 



Murrurundi. 



Moisture 



"Volatile hydrocarbons 



Fixed carbon 



Ash (grey) 



(1.) 



1-00 



66-33 



6-27 



,.. 26-40 



(2.) 

 1-01 



71-70 

 6-17 



21-12 





100-00 



100-00 



Moisture ... ... ) 



"Volatile hydrocarbons j 



Fixed carbon 



Ash 



Hartley. 



.. 82-24 



4-97 

 .. 12-79 



Wollongong, 



82-50 



6-50 

 11-00 





100-00 



100-00 



Specific gravity = 1*052. 



From the Hartley specimen, the ash was pinkish grey. 

 The analysis of the specimen from "Wollongong was made by 

 Prof. Silliman. 



A very similar shale is found in New Caledonia ; the physical 

 properties are very similar, and the chemical composition is shown 

 by the following analysis : — 



Moisture ... ... ) A r -17 



Volatile hydrocarbons j '" 



Fixed carbon ... ... 8*71 



Ash 26-12 



100-00 

 Specific gravity =1-238. 



Some of the Hartley shale has been known to yield as much as 

 180 gallons of crude oil per ton. 



Some specimens from Hartley give on fracture very long flexible 

 concavo-convex flakes. Again, some shales like those from Murrur- 

 undi are full of little specks of a white aluminous pipeclay like 

 mineral. 



The kerosene shale when heated in a tube neither decrepitates 

 nor fuses, but there distils over from it a mixture of gaseous and 

 liquid hydrocarbons. 



It is found at Stony Creek, Berrima, "Wollongong, American 

 Creek, near Murrurundi ; Greta, Lake Macquarie, and Hartley. 



Jet. 

 A true jet which takes a high polish and breaks with a 

 conchoidal fracture, occurs as occasional layers in the Hartley 

 shale. 



