33 



out of its original line. Beyond the dike the vein is tossed about 

 in very considerable confusion, the masses of ore occurring 

 rather in detached pools than in one continuous lode. 



The dip of the regular portion of the vein is to the southeast. 

 The depth to which the mine has been wrought is two hundred 

 and twelve feet. Lying below the surrounding streams, its 

 drainage is eflected by machinery; a series of well-contrived 

 pumps, driven by a small brook acting on a water-wheel, being 

 employed for the purpose. 



Nearly a mile and a half west of Dover we find the Harney 

 Mine, once extensively wrought by a shaft, but now no longer in 

 operation. The ore here resembles that of the Mount Hope Mine, 

 lying in a vein which varies from four to nine feet in thickness. 



About three-fourths of a mile west of Dover occurs the Ster- 

 ling Mine, not at present wrought. The vein of ore was found 

 to vary from two to thirteen feet in thickness. At one spot, at 

 twenty feet from the surface, it was only eighteen inches wide, 

 but grew htrger lower down. The walls consist of a hard dark- 

 coloured granitoid gneiss. Several shafts were sunk upon this 

 vein ; the deepest, however, did not exceed thirty-five feet. 



The last in this series of mines lies about half a mile south- 

 Avestward from the Sterling Mine, and is known as the Burwell 

 Mine. The vein of ore is about eight feet wide. Two shafts 

 have been sunk upon it. 



Not far from Mount Pleasant, there is a small mine upon a vein 

 which is supposed to lie to the southeast of those above traced. 

 But little is known of the length or course of this vein, any further 

 than that its direction and dip are parallel with those of the 

 others. 



A similar vein is known, and has been mined to a considerable 

 extent, near Powerville; and no doubt many more exist in the 

 district, though nothing has been done to develope them, and no 

 useful facts concerning them have come to light. It should be 

 mentioned that the long range of ore veins above traced, lies 

 almost exactly in the bearing of the vein near the old Charlottes- 

 burg Furnace, on the Pequannock. 



But few indications of iron ore have been hitherto discovered 

 in the southwestern prolongation of this first or southeastern 



