Gunpowder
--The Atlanta (Ga.) Confederacy says that the Saltpetre manufactured from the earth of the cave near Kingston, is pronounced by chemists a very superior article. Hon. Mark A. Harden has already made a large quantity of saltpetre, and will at once commence the manufacture of gunpowder on an extensive scale. So great is the supply of saltpetre, and so easily can it be obtained that Mr. Harden is confident of being able to supply powder in the greatest quantities, and at greatly reduced prices. We wish him every success.