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The imprint on matrix in cameo, having been coated with graphite, is then placed vertically in a galvanoplastic bath, and a cast, an exact reproduction of the wood-engraving, is obtained.

The galvanoplastic process of M. Coblence for obtaining electrotypes of wood-engravings is as follows: A frame is laid upon a marble block, and then covered with a solution of wax, colophane, and turpentine.

The plate from which the print is taken has been copied by the galvanoplastic process, so that it can serve for other art-unions also.

Secretary of the Franklin Institute, Philadelphia; author of "Galvanoplastic Manipulations."

The liquid of the bath supplies material for both deposits, while in galvanoplastic operations the anode supplies it to the cathode.