ANNIVERSARY ADDRESS. yi" 
1890. This increased cost is due to two causes, first to the rise 
in price of diamonds, and next to the greater wear and tear in 
the Cremorne bore, and in a number of holes sunk in basalt. 
Eight of these bores were made in basalt near Gulgong, to see if 
a gold lead existed under it ; three of the eight bores brought up 
gold bearing strata, and it-is hoped that the shaft to be sunk will 
reveal an extensive auriferous lead at a depth of one hundred and 
fifty feet. The great bore which was so successfully carried out 
at Cremorne is the deepest yet made in Australia with the 
diamond drill, and is one of peculiar interest to scientific men ; 
and we cannot help reflecting what an intense pleasure it would 
have been to our former President, the Rev. W. B. Clarke, had 
he seen in this bore the confirmation of his theory in regard to 
the presence and depth of coal under Sydney. This bore was 
commenced four inches in diameter, and maintained at that up 
to 2,000 feet, where, owing to soft strata, the bore had to be tubed 
and reduced to three inches. Fully ninety.six per cent. of the 
core has been preserved, forming the most convincing and satis- 
factory section of the strata underlying Sydney. The total depth 
of this bore is 3,095 feet. The coal cut through measured twelve 
feet. The depth bored during the year with water augers was 
two hundred and seventy-nine feet ten inches, at a total cost per 
foot of £3 2s. This high rate, £1 10s. greater than in 1890, was 
due to defective machinery. 
I read with great satisfaction the remarks of the Government 
Geologist, Mr. Pittman, on the valuable report of Mr. Geological 
Surveyor Anderson upon the possibility of finding artesian or sub- 
artesian water for the supply of Broken Hill. Mr. Pittman says: 
*“‘ Although the cretaceous rocks do not outcrop within a reason- 
able distance of Broken Hill, there is a considerable expanse of 
tertiary strata to the east and south of the Barrier Ranges, in 
which it may reasonably be expected that a permanent supply of 
artesian water would be discovered, if bores were put down 
sufficiently deep to penetrate to the impervious rocks, on the sur- 
face of which thewater would naturally be expected to accumulate.” 
