@article{648408,
      recid = {648408},
      author = {Warner, John,},
      title = {The description and use of a new-invented portable  instrument, for detecting frauds in base and counterfeit  gold, by shewing the true weight of every piece of gold  coin now current, with the quantity of gold and alloy in  each, and also of adulteration, if any, it also proves the  real value of rings, and other small toys made of gold.  These instruments are made and sold, wholesale and retail,  by John Warner, of campden [electronic resource].},
      publisher = {Printed by C. Earl, at No. 50, Dale-End,},
      address = {Birmingham :},
      pages = {12p. ;},
      year = {1773},
      note = {Reproduction of original from Cambridge University  Library.},
      url = {http://library.usi.edu/record/648408},
}