Fleta minor, or, The laws of art and nature, in knowing, judging, assaying, fining, refining, and inlarging the bodies of confined metals [electronic resource] : in two parts : the first part contains assays of Lazarus Erckern, Chief Prover (or Assay-Master General of the empire of Germany) in V. books, originally written by him in the Teutonick language, and now translated into English : the second contains essays on metalick words, alphabetically composed, as a dictionary, by Sir John Pettus ... ; illustrated with 44 sculptures.