Lesley] 5- [Jan. 2 and Feb. 6, 



US data for calculating an ore prism in sight of, say 150X200X10 ?=300,- 

 000 cubic yards. 



No. 15, Pond Bank, No. 1, worked for Pennsylvania Furnace, lies 

 in the hollow at the foot of the ridge, f mile south of the Bull Bank, see 

 local map, fig. 30. Its honeycombed, rather light, easy smelting ore, 

 (mixing well with the more sandy ores of the Bull Bank Hill, ) dips also 

 south-east, and therefore belongs to a limestone out-crop still higher 

 in the series, which is sufficient to account for its different quality. A 

 great deal has been removed from this Bank ; but much still remains to 

 be won, and water to wash it is abundant. This is included in the prism 

 of ore calculated last above. 



No. 16, Red Bank, (Floyd's Old Bank) at the road side, half a mile 

 south-west of the Pond Bank, (see Local Map, fig. 25,) is a cut in the 

 same out-crop. The amount of ore is therefore very great ; for the con- 

 tinuity of the deposits has been fully proven. The red rock-ore (35 or 40 

 per cent.) descends in a solid stratum from 8 to 10 feet thick, at a dip of 

 about 25° to the S. E. Over this lies a stratum of white clay, 3 feet 

 thick. Over this black ore in solid masses and great lumps scattered 

 thickly or thinly through several yards of wash ore, to the surface. Some 

 of these lumps are 2 feet long by 1^ feet thick. 



This Old Gatesburg Bank, as it is sometimes called, was worked 40 

 years ago, and' has been re-opened now to show its character. 



The red ore was too siliceous, and hard to work in the small cold blast 

 charcoal furnaces of the region ; but it will be eagerly sought by modern 

 hot blast coke or anthracite furnaces. 



The black ore masses were selected for charcoal cold blast use, having 

 50 to 55 per cent, of iron and being fusible ore. 



It is impossible to say how deep these strata descend on their 25° dip 

 in a peroxide condition. But allowing only 100 feet, we have in a mile 

 of outcrop 150,000 cubic yards of red rock ore ; and as the wash ore 

 ground holding the black lump ore descends with it, and spreads over 

 a belt of surface more than 100 yards wide, there must a be half million 

 cubic yards of it at the lowest computation.* 



The old cuts at the elbow of the road west of the two ponds in fig. 27, 

 have had about 8000 cubic yards excavated and are now filled with water 

 to within 10 feet of the urface, showing that much wash ore without 

 lumps. The two larger cuts 150 yards north-west of them, measure about 



* I have described above only what I aaw. Mr. Piatt was Informed that under 12. feet 

 of clay holding black lump ore, lay 4 feet of white clay without ore, under which lay 14 

 feet of red rock ore in red clay, and ore was still underfoot. I give this report for what 

 it is worth. 



Mr. Booking speaks of red rock ore only 6 feet thick, " and another fair layer In the 

 clays above, all workable ; red ore not very rich ; silicious, but with visible sand ; rich 

 black ore in the top vein, [the word he always uses for a stratum of ore] ; on the whole, 

 proper for coke furnace use ; mining requiring pumps ; deep workings at hand ; an im- 

 portant locality." 



