"Iron pyrite" Quotes from Famous Books
 ... ore may contain in the main 96% quartz, and 4% iron pyrite, and the weight of the ore may be ...
— Principles of Mining - Valuation, Organization and Administration • Herbert C. Hoover
... what they can get in the water that they suck up from the soil. But if the phosphate is treated with sulfuric acid it becomes more soluble and this product is sold as "superphosphate." The sulfuric acid is made mostly from iron pyrite and this we have been content to import, over 800,000 tons of it a year, largely from Spain, although we have an abundance at home. Since the shortage of shipping shut off the foreign supply we are using more of our own pyrite and also our deposits ...
— Creative Chemistry - Descriptive of Recent Achievements in the Chemical Industries • Edwin E. Slosson |
