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• An essay on weighing of gold : &c. wherein is shewn an effectual method for discovering and detecting of counterfeit pieces of money, (be they ever so artfully disguised) Which will be of great Use to prevent Persons being imposed upon by any of those ... and adulterated Pieces of Gold Coin, which are too common at this Time. This is performed by a Pair of common Scales and a Set of Gold Weights, with the Hydrostatical Instrument herein described, which may be had at a very small Expence. By this Method not only Gold Coins, &c. but also all ... of Gold and Silver Plate may be weigh'd, and their ... Value ascertained to the greatest Nicety. By William Symons, Author of The Practical Gauger
  by: Symons, William
  Published: (1756)
• 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
  by: Symons, William
  Published: (1770)
• The gentleman's and trader's guide : containing, the description and use of a new-invented instrument, for preventing frauds by counterfeit gold
  by: Bradford, William
  Published: (1754)
• The gentleman's and trader's guide : containing, the description and use of a new-invented instrument, for preventing frauds by counterfeit gold, improved
  by: Bradford, William
  Published: (1753)
• A table describing counterfeit pieces of gold coin : whereby they may be detected, without the use of the hydrostatical scale
  Published: (1759)