Gongin Gen Kgs: = Rathi “toe yesiaeds Com 
of thie Telspar. quartz, hornblende and black mica. . 
: “sagan = 2°779 at 20° ©. 
Ana 
gga moisture at 100° bape? 
Sili 69 
Manganese Seosbuiids Pe 5 Be ap pesees 
Magnesia 
Potash 
v ec eet eee eee tetree 
Granite, Hartley.—Composed of white and dull pink orthoulond 
felspar, with a little plagioclase felspar, quartz, black mica, some — 
crystals of hornblende, and a few minute crystals ‘of stau- 
The specimen from which fig. 1 plate V, was taken contains a 
- small quantity of auriferous iron pyrites, shown as black spots: ins 
the micro- otogra 
is from a specimen of granite from the canis aieectin 2 
is, however, much coarser in structure, and 
a in place of py 
acs ‘The galena is for the most part present in small cavities, which 
are usually Hip ith quartz crystals. Both gold and silver are — 
Present in small quantities in the galena, but the granite itself 
ho indications of either metal. The —— portions of the — “ ca 
ph are particles of galena. ese specimens were 
Mr, ©. S. Wilkinson, x08. the Government _ 
Analysis, 
ee moisture at 100° C......... 
Suekonste : 
a ee ee rrr. mes ve me or 
sTitiade 
2 
— 
% 
5 
i 
lia 
