An essay on weighing of gold , &c. wherein is shewn an effectual method for discovering and detecting of counterfeit pieces of money, on the principles of hydrostatics. Whereby not only Gold Coins, but also all Sorts of Gold and Silver Plate may be weighed, and the intrinsic Value thereof ascertained to the greatest Nicety. To which is prefixed, a very extensive table, wherein a great Number of Counterfeit Pieces of Metal, now circulating for genuine Gold, are described. The second edition. By William Symons, Collector Of Excise, Author of The Practical Gager.
Symons, William | Date: MDCCLXX. [1770]