Lesley. 1 



72 



[Jan. 2 and Feb. 6, 



Of this, about 100,000 tons have been passed through the furnace, yield- 

 ing nearly 50,000 tons of neutral cold blast charcoal iron of the best 

 quality, leaving 500,000 tons of ore to be excavated. 



But this is only a portion of the deposit ; for the ore ranges away 

 beyond the high walls of the open cuts into the surrounding laud an un- 

 known distance. The large area stripped last year towards the north- 

 east shows how extensive the deposit is in that direction. 



Add to this the great depths to which the ore is known to descend, and 

 it seems to me certain that a million of tons is as probable an estimate as 

 a half a million. Large quantities of ore are left standing between 

 the hard limestone ledges exhibited in figure 40 (taken from a in local map 

 fis:. 38), and in figure 34, which is an enlar.ijed view of the sharp promontory 

 seen in fig. 33, sketched to show its geological structure. The dip of 

 these limestones is to the S. 35°, E. > 35° to 40° ; and they are exactly 

 on range with the limestone outcrop along the road, at the quarry, and 



Fig. 38. 



^e4/t/n^>/^G/n^'ci. ^i,t/i'na.ae^!^it>%tfr a*>e/ ,/^fuaciac&. j/x<SE^irr- aL,f^^£tJ/-y 



past the Furnace, as shown in fig. 37. Slight crumplings of the limestone 

 vary the dip from 18° to 65°; but these are due either to movements in 

 the yielding ore mass or to a deception caused by mistaking cleavage 

 planes for bed plates. No such variations are appai-ent at a distance 

 from the banks, the whole limestone formation descending uniformly 

 beneath the foot of Tussey Mountain with a dip of something under 40°. 

 The pictures figs, 41 and 42 are views of the deep cut looking east from 

 a in local map fig. 37. The view in fig. 43 is taken looking northward 

 into the main ore banlc, from near a ; and it shows the new incline, the 

 washing house, and the ridge above it, along the crest of which the 

 aqueduct is carried on tressels, for 2000 feet. Fig. 38 shows the end of 

 the aqueduct where it is mounted by the pipe leading up the hill-side 

 from the double Worthington pump in the engine-house, fed by another 

 pipe from the dam. Behind the hill seen in fig. 43, in a hollow on a level 

 with the northeast end of the banks, is the settling-dam. 



