Macfarlane on the Acton Cojrper Mine* 



453 



visible here, as at Flowers's pit. This rock, before its excavation, 

 bent over the point a, and constituted the arch of limestone men- 

 tioned in a former descriptioo of the mine, by the Rev. A. F. Kemp.* 

 It was on this arch that the first excavation was made in opening 

 the mine. Harvey's pit was last worked in September, 1861. 

 The previous mining had been done very irregularly, and the 

 cupriferous limestone had not been wholly removed; but a con- 

 siderable part of it was left against the hanging wall, as shewn in 

 the following sketch. This Hmestone had, moreover, been sup- 



Section along the line c — d of the general plan, 

 N. W. S. E. 



A, hill limestone ; B, underlying shale ; C, cupriferous limestone ; 

 D, hanging shale ; E, greenstone. 



ported by heavy timbering, which again had been loaded with 

 waste rock. To have taken down the whole of this limestone 

 would have been expensive, and to have cut through it to the 

 hanging wall beneath the timbering would have left the pit in a 

 very unsafe condition. To have sunk a shaft at one end of the 

 pit would probably have been the best plan, had it not been 

 thought preferable to sink or drive from No. 1 shaft, 140 feet 

 northwest of Harvey's pit. These considerations prevented any 

 excavation from being made in this opening ; and, since September, 

 1861, it has been used as a reservoir for water employed in dress- 

 ing the ore. There is still ore visible in Harvey's pit, nearly in 

 the middle at the deepest point, and on the stope at the west end. 

 The next open working of importance, to the west of Harvey's 

 pit, is Williams's pit. In September, 1861, it was separated from 

 Pike's pit by a piece of ground, since removed, under which a 

 very large drift had been excavated. The east side of Williams's 



♦ See Canadian Naturalist, Vol. V. page 360. 



