On Sulphurets of Copper from the Canton (Ga.) Mine. 11 
which they lie in contact is important as bearing directly on the 
formation of the former, as will be noticed in the sequel. The 
both by the total disappearance of the peroxyd, and the restora- 
tion of the mica schist in its nornal condition, does not descend 
vertically in the plane of the vein, but takes a downward and 
easterly course pitching, within the walls of the vein, at an angle 
of 45°. (In this general direction a winze has been sunk, inter- 
secting the 145 ft. level and communicating with the 200 ft. level 
below.) Here just at this lower limit of the cage cet area, 
reminding one, by its position, of the oecurrence of the black 
oxyd, in the famous Ducktown mines, first occur the two sulphu- 
rets of copper, which are the subject of this paper. They first 
appear as a ‘string’ near but not immediately on the north wall, 
Which while pitching at an angle of 45° to the east, rapidly en- 
larges to a fine ‘bunch’ of ore from 14 to 18 inches thick, which 
ecomposition of the rocks. Solid masses of the ores of 40 and 
50 pounds have been taken from the bunch. The latter how- 
ever contained quartz. : oe 
€ relative proportion of these minerals (which were at first 
gcanded) varies, The most pesbie is pees in ao nye 
teal properti sition with copper-glance, while i 
iiihs webinar i oa this account it has 
at an angle, andthe mineral appears W 
form i ec of vic suai ad tary 
Ted eee OT SDS Oe ee ae 
by the Basten Beavis of the ore, which is still eminently 
