142 
From the above experiment it will be seen that the gold in this material 
can be recovered to the extent of 90 per cent. To effect this, however, 
special means would have to be adopted to enable the solution to per¬ 
colate, or by agitation (stirring) to bring the solution into immediate con¬ 
tact with the ore and so dissolve the gold. All this must be taken into 
calculation in determining the value of the ore for treatment, as it would 
add materially to- the cost. 
The following is a complete analysis of the slate (No. 232) made under 
the supervision of Mr. P. G. W. Bayly. 
Si 0 2 
5578 % 
-AlgOg ... ... 
20^84 
Fe.>0 3 
2 ■ i 0 
FeO 
11. d 
MgO 
1 *87 
CaO 
o*c8 
Na.,0 
0-40 
k 2 o 
5 T 5 
h 2 o + 
4* 18 
H *0 - . 
7 ’26 
Tin 2 . 
0-87 
C() 2 
.—l 
• rH 
& 
PoO, . 
trace 
so* . 
0-17 
Cl 
0*09 
c .. 
1 -59 
Less 0 = Cl 
100-38 
O ’02 
cz. 1 dwt. 0 gr. per ton. 
ioo’36 
Silver—trace. 
lR»i>ort sent in 20.5.op.] 
THE INDICATOR AT JONES’S CREEK, NEAR DUNOLLY. 
By W. H. Ferguson. 
The following particulars about the indicator formerly worked by 
the Jones’ Creek Gold Mining Company at Jones’ Creek, parish cf 
Waanvarra, were gathered partly from my own observations and partly 
from information furnished by Messrs. Raven and Gourlay, who are suc¬ 
cessful indicator prospectors. 
The bedrock consists of Ordovician slates striking N. 5 deg. E. to N. 
10 deg. E., and dipping 75 deg. E. In the old workings at 15 feet 
from the surface decomposed yellowish slates and dark blue carbonaceous 
slates can be seen, all containing very small nodules of some dark mineral. 
