Lesley.] OZ [jaji 2 and Feb. 6, 



From the northeasternmost Hvintingdou Furnace Diggings to the last 

 Dorsey Digging is a stretch of about 2000 yards, with ore shows filling 

 up the intervals between the banks. There is a maximum breadth of 

 500 yards. But if half that be adopted for an estimate, we have an area 

 of wash ore here equal to 100,000 square yards, in all respects like that 

 of the Dry Hollow Bank district (on the same range) described above, 

 and representing, at least, one or two millions of cubic yards of ore 

 ground, besides whatever deeper deposits of pipe ore exist. 



As in Dry Hollow, so here much lean ore is mingled with the rich, and 

 -much dead stripping will be required in places. 



There is this distinction : the ore of the barrens, that is the liver- 

 colored and more sandy ore ranges along the northwestern side of the 

 belt of outcrop, up the hill-side ; pipe ore characterises the down hill, or 

 southeastern side of the outcrop. The main bank is wholly iu the top or 

 v-wash ore covering, and has merely revealed the principal deposit of rich 

 irock ore and pipe underlying it. Those who worked the pit describe a 

 llayer of ore 6 to 8 feet thick as apparently creeping downhill, overturned, 

 ; and .covering itself. What this description means I do not know, .he 

 « ore makes excellent iron. 



It is vinneeessaryfor me to say that the ferriferous limestones described 

 in the above details, and crossing the river (S. W.) into Sinking Valley, 

 carry the ore ground outcrops with them, and that these have been mined 

 to some extent at various places south of Barre Forge, yielding both rich 

 and lean wash ore, and rock and pipe ore, of the same general character. 



The same statement holds good as to Canoe Valley, although its nar- 

 rowness does not permit its anticlinal to bring the lowest h orison of ore 

 to the surface. 



In Sinking Valley the two sides of its dying anticlinal bring the ore- 

 outcrops together about three miles south of the river. The following 

 are some of the ore banks : on the south side, Pine Hill Bank (^ mile 

 from the river) ; Moore's Pipe Ore Diggings (1 mile) ; Galbraith's Pipe 

 Ores (1^ mile) ; Robinson''s Bank (2j miles). On the northwest side are 

 Grentzhammer's and other outcrops. 



It is a serious question why mines of Brown Hematite Iron Ore have 

 5 not been opened on the Juniata River above the mou!!h of Spruce Creek. 

 This question seems to be answered by my section along the river, fig. 1. 

 I It is evident that the horison of the Pennsylvania Furnace or Cale Hol- 

 i low ores scarcely rises on the back on the Canoe Valley axis to the level 

 ■ of the valley bed, and is . immediately carried down again by the syncli- 



