Fleta minor. The laws of art and nature in knowing, judging, assaying, fining, refining and inlarging the bodies of confin'd metals. In two parts. The first contains essays of Lazarus Erckern ... in V books: originally written by him in the Teutonick language, and now translated into English. The second contains essays on metallick words, as a dictionary to many pleasing discourses by Sir John Pettus ... Illustrated with 44 sculptures ... / [Sir John Pettus].

  • John Pettus
Date:
1683
Catalogue details

Licence: Public Domain Mark

Credit: Fleta minor. The laws of art and nature in knowing, judging, assaying, fining, refining and inlarging the bodies of confin'd metals. In two parts. The first contains essays of Lazarus Erckern ... in V books: originally written by him in the Teutonick language, and now translated into English. The second contains essays on metallick words, as a dictionary to many pleasing discourses by Sir John Pettus ... Illustrated with 44 sculptures ... / [Sir John Pettus]. Source: Wellcome Collection.

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    eth in the afpedt wea\ and ruffe, alfo the Hmgdrijh or XV. other weak Gold will not touch it felf right upon Touch. Seaion; Hotter which are too hard, for the Gold doth run over it, that the ftroak is not very well to be been, and that Touch~'slonc is not good which doth not touch the Gold, of what Contents foeyer it be, with a fine good and ftrongflroa\, that it be bright upon it, and alfo the Touch-needles as long untill the fame ftroak be like the Gold-ftroal\ in the colour, and as high: then you have ve¬ ry nigh the Content of the Gjold: only, as I have given an account above, Obferve well, whether the Gold be high -grain'd; viz. whether it hath much Copper added, or much white , which is called Pale Gold, according to gmjK this, ufe the Needier, which every one doth not under- ftand, and therefore he muft have the Knowledge of the righ jlroa\from great PrafJice. But as to the hard Concerning Gold, they do not give a rightflroa\, but they do touch brick] (Gold; all of a fmaller content than they have in fine Gold, therefore fuch ftroakf are to be judg’d falfe and uncer¬ tain* chap, xv Ho ip the Gold is to be -proved by Aqua fords. neceffity to ufe for a tryal, but if it is a cafl Ingot3 then Nn ' beat' bove* at one end of it, and below at the other end., and beat the Bits thin that you may weigh fo much as you have F you have fieces of Qold either in To cm Plates or Ingotts, and wouldft affay S. them, then firft cut Pieces or Plates a To cut pieces ftif