THE MINERALS OP NEW SOUTH WALES. 



157 



In specific gravity it varies considerably, the mean being about 

 17-5. 



A specimen of Braidwood gold had a specific gravity of 18*28. 



Composition. — No specimens of actually pure gold have been 

 met with. There is always more or less silver present, and usually 

 traces of copper, iron, and other metals. 



Per centage of silver, copi^er, and iron in New South Wales Gold. 

 Determinations made at the Sydney Mint, December, 1854. 



Gold Field. 



Mean of 



No. of 



specimens. 



Silver. 



Copper and Iron. 



Tambaroora 



14 



8 



4735 to 7' 64 

 4- 29 to 8- 37 



Trace to '125 

 ' 13 



Turon 



Meroo 



5 



3" 86 to 5-005 



•105 



Mookerawa 



1 

 1 



5-69 

 5 93 



' 03 



Other metals *01 



Ophir 



Adelong 



5 



5-115 to 6-665 



„ *015 to 13 



Araluen, Major's 

 Creek 



2 



5- 05 to 6- 49 





Araluen, Bell's 

 Paddock 



1 



10 345 



. 



Bingera, nugget 4 

 oz. 3dwts. 



1 



12-525 





Hanging Pock, 

 Oakenville Creek 



1 



6-295 





Hanging Pock, 

 Cordillera Gold 

 Company, Peel 

 River 



1 



9-325 





Pocky Piver 



1 



5- 63 





Prom the above average the average value was 80/6 per oz., the value of 

 the standard oz. being 77/lOJd. For the materials of the above table I am 

 indebted to Dr. Smith. 



