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To write on Paper with Gold or Silver

Take some nitro-muriate of gold, or nitrate of silver and expose it to a gentle heat in an open vessel, by which means, the acid will be evaporated, and the metal will form itself in crystals on the sides, or at the bottom of the vessel. These crystals may be carefully collected, and dissolved in water. With this solution, (which is an aqueous solution of nitro-muriate of gold, or nitrate of silver) any writing may be performed on paper, with a common pen, and by being exposed while damp, to the action of hydrogen gas, the writing will be revived in metallic lustre.