Lesley.] o(J [jan. 2 and Feb. 6, 



this circle, but are excavated in the same belt of outcrop. The outcrop 

 is very broad because, as we have just seen along Warrior's Run, the 

 southeast dip is very gentle, about 10°. This has allowed a very large 

 dissolution of the ore-bearing rocks. 



The Wilson Bank is two miles west of Warrior's Run ; no ore has 

 been found in this interval, the slopes being sandy. Here limestone begins 

 to come in, overlying the sandstone, and ore-bearing clays take posses- 

 sion of the surface. This sandstone has been mistaken for the Calciferous 

 Sandrock ; but must be one of the numerous intercalations of sand in the 

 great limestone series. 



The Keefer Banks follow, in the next half mile, and, although ex- 

 hausted as to the wash ore of the outcrop, can be mined to the deep if 

 proper pumping apparatus be mounted to keep the underground water 

 down. 



Fig. 44 gives a local map of these excavations, which severally measure, 

 as they come in order along the line of Mr. Piatt's survey : — 



Total excavation, say, 161,000 cubic yards. 



No. 32, Dorsey Banks, see fig. 44. 



These woi-ks lie just outside the two mile circle arou.nd Huntingdon 

 Furnace Stack (see Land-line Map), and are used for Barre Forge, dis- 

 tant three miles due west on the Little Juniata River ; the nearest distance 

 to the river by the Township line in a southwest direction being two 

 miles. 



There is first an open cut on the south side of the road, see fig. 44, measur- 

 ing 65 X 25 X 6 ^= 9,750 cubic yards of excavation, with wash ore in the 

 walls. Then, a shallow open cut, ten or twelve feet deep, 75 X 30 X 4 

 = 9,000 cubic yards, the floor being everywhere wash ore. 



The Main Bank, in the southwest corner of fig. 44, is divided by a 

 slide of the southeast wall into two open cuts, 200 X 70 X 15 = 210,000 

 cubic yards, with wash ore walls and floor (now generally 30 ftet deep), 

 but excavations have been made much deeper. 



* These lie south of the road, on the large map. Eight yards is taken as the average 

 depth of both, but they may have been worked deeper. Wash ore forms the walls. 



t Also south of the road and beyond the limits of fig. 44. 



% North of the road, at the northeast corner of fig. 44. It has not been worked for 

 years. Wash ore forms the walls. 



§ North of the road, and of the Dorsey Bank, fig. 44. Both have fallen shut. Wash 

 ore forms the walls. 



