Similar Items

• 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 and traders guide : containing a description and use of the newest invented instrument, ever made publick, for preventing frauds by counterfeit gold ... the instrument is neatly made in brass, and very easily portable for the pocket
  by: Bradford, 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, which Gives the Weight, and shews the Alloy of that metal, as well in Coin as in Rings, Jewels, and all Kind of Utensils made thereof; with The Quantity of Adulteration (if any) The instrument Is neatly made in Brass, and very easily portable in the Pocket - Any Person, by sending to the authors, (post paid) may have an Instrument made to Weigh and prove any larger Coin or Utensils of Gold and Silver than This Instrument is design'd for, By W. Bradford, Teacher of the Mathematicks, R. Darby, and J. Hulls. All of Campden, in the County of Gloucester. Sold Wholesale and Retail by the Patentees at their Ware-House in Campden, and in most Towns in England
  by: Bradford, 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, (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)