The Phosphates of America. Where and How They Occur; How They Are Mined; and What They Cost. With Practical Treatises on the Manufacture of Sulphuric Acid, Acid Phosphate, Phosphoric Acid, and Concentrated Super-Phosphates

The Phosphates of America. Where and How They Occur; How They Are Mined; and What They Cost. With Practical Treatises on the Manufacture of Sulphuric Acid, Acid Phosphate, Phosphoric Acid, and Concentrated Super-Phosphates