Valuable Secrets Concerning Arts and Trades: Or, Approved Directions, From the Best Artists : for the Various Methods of Engraving on Brass, Copper, or Steel. of the Composition of Metals, and Varnishes. of Mastichs and Cements

Valuable Secrets Concerning Arts and Trades: Or, Approved Directions, From the Best Artists : for the Various Methods of Engraving on Brass, Copper, or Steel. of the Composition of Metals, and Varnishes. of Mastichs and Cements