To silver iron, first cover the iron with mercury, and silver by the galvanic process. By heating 300 degrees C., the mercury evaporates and the silver layer is fixed. Ironware is first heated with diluted hydrochloric acid, and then dipped in a solution of nitrate of mercury, being at the same time in communication with the zinc pole of an electric battery, a piece of gas carbon or platinum being used as an anode for the other pole. The metal is soon covered with a layer of quicksilver: is then taken out and well washed and silvered in a silver solution. To save silver, the ware can first be covered with a layer of tin; one part of cream of tartar is dissolved in eight parts of boiling water, and one or more tin anodes are joined with the carbon pole of a Bunsen element. The zinc pole communicates with a well-cleaned piece of copper, and the battery is made to act till enough tin is deposited on the copper, when this is taken out and the ironware put in its place. The ware thus covered with tin chemically pure and silvered is much cheaper than any other silvered metals.