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On the Bristol Copper Mine. 365 
although it may increase in descending: to the north, however, 
it holds its width as far as it has been explored. Jilbard’s level 
was driven in this direction from the 20-fathom cross-cut, for a 
distance of over 300 feet, and the flucan there found to have a 
width of 41 feet. Still further.to the north it has been cut at the 
surface, beyond Ives’s level, but its width in this place was found, 
to be at 30 feet from the surface much diminished. 
The deposits of ore are not entirely confined to the primary. 
Within the sandstone, which at the line of junction is so broken 
up and irregular, that its stratification can with difficulty be made 
out, a small seam of ore was cut in the 20-fathom cross-cut from 
the engine-shaft. It has been driven on both-ways from the 
cross-cut to a distance of about 160 feet to the north, and 120 to 
the south. The upper part of this course of ore is still standing, 
showing a narrow seam of quartz rich in ore. The level to the 
vorth is at present inaccessible: to the south the ore appears to 
run out at a distance of about 50 feet from the cross-cut. (This 
seam of ore is shown in the cross section at A. 
History of the mine.—This locality has been known for a long 
period as a place furnishing copper, and was opened to a very 
limited extent many years since. In 1836 Mr. G. W. Bartholo- 
mew made an open cut in a spot where indications of ore were 
continuous veins or layers of ore which in places had a thickness 
of two inches.” —Rep 
= The property subsequently passed into the hands of Mr. A. R. 
Miller, who drove various shallow levels near the surface, explor- 
ing for copper. While in his possession it was visited and re- 
