Tennessee Valley Authority production. Elemental phosphorus. A section of a TVA plant in the Muscle Shoals area in which phosphorus is produced in its elemental form. 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 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