The chief exports are stone for road-making, butter, eggs and vegetables; the chief imports are coal, timber, superphosphates and wine from Algeria.
In the production of pyrite, which is found in Louisa county and is used for the manufacture of sulphuric acid employed in the treatment of wood pulp for paper-making and in the manufacture of superphosphates from phosphate rock, Virginia took first rank in 1902 with an output valued at $501,642, or 64.7% of the total yield of this mineral in the United States; and this rank was maintained in 1908, when the product was 116,340 long tons, valued at $435,522.
By the late 1800s, superphosphates were all the rage and eighty factories were manufacturing this high-yield fertilizer from coprolites (that is, phosphate-rich fossils of ancient animal dung—I kid you not).
How would you define superphosphates? Add your definition here.