247 
At the level of the main crosscut a drive was put in south along the 
fault, and at 90 feet from the crosscut a rise put up. Very little quartz 
was to be seen in this rise. 
From the result of my examination, I am of the opinion that the quartz 
is better developed in the shallow levels. The pitch of the stone appears to 
be southerly, so that any makes of stone should be met with on the surface 
further north. 
Prospecting at a shallow level by means of a windlass or whip-shaft 
would prove any shoots that may exist, and this work could be cheaply 
carried out as compared with the method now to be adopted of putting all 
quartz and mullock down a long shoot to be trucked about 400 feet and 
hauled 200 feet to the surface. 
From a geological point of view, the mine is well situated, but the line 
of fault along which operations are now confined does not appear to have 
been much worked. Hanthorn, in 1887, obtained about 600 oz. of gold 
from a shaft about 1,000 feet north, but further particulars are not available. 
From the appearance of the stone where visible in the rise, it would seem 
that two conditions are necessary for the occurrence of a shoot—the forma¬ 
tion of a vein of quartz, and the intersection of that vein with a favorable 
belt of slate or sandstone. As the belts of strata are, for the most part, 
very narrow, such shoots will be consequently narrow, and as the angle of 
dip is fairly flat, economical working does not appear easy. A crushing is 
at present being got out from the rise workings, where the stone is thought 
to be payable. This make might be tested, but the better plan to adopt, 
if this line is to be developed, is to drive south at the main level and 
intersect any makes of stone on their southerly pitch. To discover 
auriferous shoots in these formations will then be another matter. 
To date, a sum of ,£3,785 capital has been expended, together with 
£425 for gold from trial crushings. A main shaft has been sunk 200 feet, 
and a total of 1,011 feet of crosscuts, 636 feet of driving, 350 feet of 
rising, carried out. This does not include stope workings. 
[27.2.0 s.] 
THE BIRTHDAY MINE, BERRINGA, NEAR SCARSDALE. 
By E. ]. Dunn, F.G.S ., late Director , Geological Survey. 
The shaft of the Birthday Mine is 1,270 feet deep. At No. 6 level, 
which is 550 feet from surface, centre country occurs in the west cross¬ 
cut at 270 feet from the shaft. The channel of the Birthday reef occurs 
at 90 feet from the shaft in this cross-cut; the lode channel is vertical, 
and the level has been driven along it north for 90 feet and south for 
75 feet. 
At No. 10 level the extreme distance driven south from the cross-cut 
is 680 feet, and at 613 feet a winze has been sunk 42 feet. There is a 
good hanging-wall in the bottom of the winze dipping 78° W., and the 
reef is 3 feet thick. There is 6 inches of grey slate on the hanging- 
wall, and then grey sandstone. Stoning has been done above the No. 
10 level, and it appears as though the bottom of the shoot of gold was 
passed through in the winze a few 7 feet below No. 10 level, for quartz 
carrying a few dwt. of gold was crushed from the upper part of the 
winze, while the quartz at the bottom of the winze is extremely poor. 
No advantage is to be gained as far as prospecting is concerned by con¬ 
tinuing the winze, but it would be useful for ventilating purposes. The 
proper course here would be to sink the winze and then drive south, say, 
