Metallographia: or, an history of metals. Wherein is declared the signs of ores and minerals both before and after digging, the causes and manner of their generations, their kinds, sorts and differences; with the description of sundry new metals, or semi metals, and many other things pertaining to mineral knowledge. As also, the handling and shewing of their vegetability, and the discussion of the most difficult questions belonging to mystical chymistry, as of the philosophers gold, their mercury, the liquor alkahest, aurum potabile, and such like / Gathered forth of the most approved authors that have written in Greek, Latine, or High-Dutch; with some observations and discoveries of the author himself. By John Webster.
- John Webster
- Date:
- 1671
Licence: Public Domain Mark
Credit: Metallographia: or, an history of metals. Wherein is declared the signs of ores and minerals both before and after digging, the causes and manner of their generations, their kinds, sorts and differences; with the description of sundry new metals, or semi metals, and many other things pertaining to mineral knowledge. As also, the handling and shewing of their vegetability, and the discussion of the most difficult questions belonging to mystical chymistry, as of the philosophers gold, their mercury, the liquor alkahest, aurum potabile, and such like / Gathered forth of the most approved authors that have written in Greek, Latine, or High-Dutch; with some observations and discoveries of the author himself. By John Webster. Source: Wellcome Collection.
![554 Muf. Worm, 1. i.Se^.3. c, 11. p. 150, of For metallary Stones they are of divers forts, growing or cleaving *to the Metals, fometimes on one fide, fometimes on another, and fometimes on both,and are as it were the Matrixes, or Coats, where¬ in the Metals lie inclofed: Forth of which alfo Me¬ tals are drawn, or decoded. -1. The fir it is the Saxum which I take to be that which we call flate , which may be cloven into thin parts,and is of divers colours, as blue, fometimes blacker, fometimes whiter, and the like ; fome refer this to a Fire-ftone, and iome'to other things. 2. Thefecond fort is that which the Germans call which fometimes is moft white, fometimes a little yellowifh, fometimes grayifh. To this fome¬ times fpcitrks of Gold do adhere. 3. The third is Spatum, ( for which I know no Frigi^h word ] that is more fmooth , and hard than the reft, by fome it is called Metalary Marble, Of this (he faith) he had divers kinds brought from the Mines of Norway, where Silver was gotten. One that was barren, and contained no Metal nor other Mine¬ ral, white, and cut into pieces. Some mfted with Fire’ftone, or is with barren Galena, or with Galena, -Fire-ftone, and Silver.- By which we,may difcern what various mixtures Nature exercifeth in the Mines; 4. The fourth is saxum Corn turn, or Flint, fletn, which appeareth moft hard, of the colour of Morn, whofe parts are fometimes fo continuate, that ©ne cannot difcern one from another, fometimes con- fpicuous by fome Interfedion. 5. Lapis Arenofus^&s though compounded of Sand, called ffem : this is that which we call Free- ftone.](https://iiif.wellcomecollection.org/image/b3032399x_0382.jp2/full/800%2C/0/default.jpg)
