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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    <■¥ Of Gold Oars. in Se&ioti. 17. heat of the fire may wind about it, and alfo the heat Cap.] I of the fire remain together in the Oven, and force it felf through it to the top of the Furnace, and fuch for- and incloied Heat doth much more than in an open Roast, and when the Roaft in the oven burneth at the fierceft, then muft water be poured on it, and be quen- ed fuddenly, therefore fuch a Roaft Oven for better Ad¬ vantage is to be built in fuch a place where water may eafily be poured into it, fo the fubtil Gold will run to- gether in grains,and the ftone will becom brickie (as hath been faid before) although the fame do become brickie only with burning, yet it becommeth more brickie by quenching , and it is done more efpecially for the Gold fake. The form of fuch Roajl-Ovens, and how they mu ft ftand in its proportion and flupe, will be feen in this following Sculpture, thus ., ' -, W;r. . • •.> • * Deciphered x 1. The Form of the Roafting-ovenr. 2. The Shutters to them. 3. The In-fide of them* 4. The Partitions in them, made of Tile, and a ferfon at ending at the mouth of them. * 5. He that f ours Water into the top of the Oven. 6. The wood that isufed in thofe Roafting-oVens. 7. The Inftruments to clofe the Ovens. 8. The Ladder to go to the Top of the Oyen. 9. The Pieces of Metal that are to be ufed.