Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/287

Rh balance of the ore is put through washers before roasting, Until exploitation had demonstrated the presence of a suitable body of ore here, mining had been carried on in a rather primitive manner; but during the early summer improvements were projected for the more economical handling and washing of the ore, so as to permit of its being delivered at the furnace 4 miles distant at a minimum cost.

In the absence of any railroad connections all the ore, after being roasted, is hauled to Logan by 6 horse teams, carrying from 4 to 6 tons each, and costing about 55 cents a ton to deliver. The Logan I. & S. Co, were mining about 500 tons a month at this point; and since the mine was regularly equipped for active development in 1830, it bas furnished about 60,000 tons for use in the manufacture of the well-known Logan irons. The analyses of this ore, kindly furnished by Mr. R. H. Lee, Jr., shows the surface ore to contain from 31 to 37 per cent. of iron; 30 per cent. silica ; and 0.5 to 8 per cent. of sulphur.

The 100′ level shows about 40 per cent. of iron; only 6½ per cent. of silica and about 8 per cent. of sulphur, while the roasted lump-ore gives from 55 per cent. to 57 per cent. of iron, 12 to 16 per cent. of silica and about 1 per cent. of sulphur. These analyses of Mr. Lee’s can be best shown in tabular form: