80 
APPENDIX. 
Examination of Samples made at the Mines Department Laboratory.. 
(By IT. C. Jenkins , A.R.S.M., <$yc.) 
Samples Examined. 
Result of Examination. 
Loose material from vughs 
in quartz reef ... 
Coating on walls 
drives, &c. ... 
A greenish slate 
of 
Silicates of alumina, iron, and magnesia, with a trace of alkalies. 
A fine, almost pure, kaolin. 
Ferruginous bauxite—a brown powder. The substance showed 
Fe 2 O 3 . AI 2 O 3 + H9O by qualitative analysis and must, pro¬ 
visionally, be viewed as bauxite. 
Analysis gave the following percentages :— 
Silica 
... 44-02 
Alumina 
... 35-89 
Ferric oxide 
... 244 
Ferrous oxide 
... 1-70 
Copper 
... Nil 
Magnesia 
Trace 
Antimony oxide 
... 0-73 
Soda 
... 8 64 
Potash 
2-42 
Water 
5-12 
100-96 
Mine water 
.«* Total solids, 17*8 parts per 1,000 (1,246 grains per gallon) 
Fixed solids, 16*8 ,, ,, ,, (1,176 ,, „ ,, ) 
Analysis of solids shows percentages of :— 
Silica 
Ferric oxide | 
Alumina ... S 
Lime 
Magnesia 
Soda 
Potash 
Sulphur 
... *003 ’ 
... 0018 
... *0173 
... T395 
... *242 
... Trace 
... *0556 ; 
Quantities referred to the 
amount of water. 
