Tennessee Valley Authority production. Elemental phosphorus. A large electric phosphate smelting furnace used in the making of elemental phosphorus in a TVA chemical plant in the Muscle Shoals area. The phosphorus, used in the manufacture of incendiary bombs and shells and of material for "smoke," is produced by smelting phosphate rock, coke, and silica together in the electric furnaces and condensing the resulting phosphorus gases. When surplus phosphorus is available, it is converted into highly concentrated phosphatic fertilizer, much of which is shipped abroad under provisions of the Lend-Lease Bill