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:
| Towsend Mine Carbonate Ores: Unroasted, | R. H. Lee Jr., Chemist, | |||
| Average ore near surface. | Lump. | 100′ Level, | ||
| SiO2 | 31.20% | 30.09% | 29.98% | 6.43% |
| Al2O3 | 7.35 | 7.40 | .099 | 2.65 |
| P | 0.097 | — | — | — |
| H2O | 8.56 | — | — | — |
| Fe | 31.37 | — | 37.44 | 39.41 |
| CaO | — | — | — | 1.12 |
| S | — | .437 | 3.14 | 2.98 |
| Roasted Lump-Ore from 60′ level | ||||
| FeO | 79.19 | 81.96 | ||
| Alo | 4.38 | 2.22 | ||
| SiO | 12.42 | 16.25 | ||
| P | .137 | .162 | ||
| S | .896 | 1.12 | ||
| Iron | 55.43 | 57.37 | ||
