The blue rock field proper covers a territory bounded approximately by a trapezoid having as its four corners Centreville, in Hickman County; Kinderhook and Mt. Joy, in Maury County, and Lewis Monument, in Lewis County. Traversing this territory are Duck River, Indian, Swan, Blue Buck and Cathey’s creeks, and their tributaries, and outcropping along these valleys and underlying the ridges between them are deposits of blue rock running in bone phosphate from 60 per cent to 78 per cent, with less than 3 per cent iron and alumina, that will aggregate in the neighborhood of 40,000,000 tons. This field will soon be developed by the extension of the Nashville, Chattanooga & St. Louis branch up Swan Creek and the Louisville & Nashville branch down Swan Creek, with side lines and spurs leading off each, surveys for which have been made, and work on construction will soon be under way. If, however, the Florence Northern Railroad should ever be built from Florence to Nashville it will run through the heart of this territory as well as the magnificent iron deposits of Wayne and Lewis. With the above road and a road from Huntsville on the southeast to Milan on the northwest all of the phosphate territory would be fully developed, and this section of Maury, Hickman, Lewis, Perry, Giles, Davidson and Williamson counties would be the site of more fertilizer factories than will be found elsewhere in the world in the same space. Contributary to such prospective development is the present opening up of pyrites deposits at Pyriton, near Talladega, Ala., with ore running two to four units higher than the Virginia ores, and while from four to six units lower than the best Spanish ores, it is much more free burning than the latter, and with its advantage in freight rates, will likely give manufacturers equally as good a product at a lower price. The vein of pyrites is about one and one-half miles long and from four to fifteen feet thick and has been exploited to a depth of 430 feet, the ore improving in quality with the depth. It is reported by manufacturers who have used it to be the freest burning pyrites ore known, leaving only about ½ of 1 per cent of the sulphur in the cinder and containing no deleterious ingredients. The deposits are controlled by the Alabama Pyrites Company and the Southern Sulphur Ore Company, the latter owned by Messrs. Carpenter & Howard, of Columbia, their vein running from eight to fifteen feet thick. The railroad into this deposit has been built from the Louisville & Nashville, at Talladega, a distance of twenty miles, at a cost of nearly $400,000.