Fleta minor, or, The laws of art and nature in knowing, judging, assaying, fining, refining, and inlarging the bodies of confin'd metals [microform] : 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 himn in the Teutonick language and now translated into English ; the second contains essays on metallick words, alphabetically composed as a dictionary / by Sir John Pettus ... Knight, ...