In depositing a copper coating on a plaster statue by the electrotype process, coat the statue several times with linseed oil or saturate with melted stearin to render the plaster non-absorbent to the copper salts; these would destroy the statue. When the surface is dry and firm, apply a coat of paint made of bronze powder mixed with methylated spirit only. Work this into every crevice with a soft brush, and when it is dry well brush every part with blicklead to get a smooth surface. Brush with an alcoholic solution of phosphorus, and then with an ammon:ate solution of silver, prepared by dissolving silver nitrate to saturation in strong ammonia. To ensure conduction to all parts of the statue, several fine wires should be led to the deeper crevices. A battery of Daniell cells should be used, and deposition should proceed slowly to obtain a smooth coat of copper.