Sylva sylvarum: or, a natural history. In ten centuries. Whereunto is newly added the History naturall and experimentall of life and death, or of the prolongation of life / Published ... by William Rawley ... Whereunto is added articles of enquiry, touching metals and minerals. And the New Atlantis. With an alphabetical table of the principal things contained in the ten centuries.

Francis Bacon

Date:: 1676

Credit: Sylva sylvarum: or, a natural history. In ten centuries. Whereunto is newly added the History naturall and experimentall of life and death, or of the prolongation of life / Published ... by William Rawley ... Whereunto is added articles of enquiry, touching metals and minerals. And the New Atlantis. With an alphabetical table of the principal things contained in the ten centuries. Source: Wellcome Collection.

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$Metal is turned into Glafs? and when the Metal doth but hang inthe Glaf- fie part ? alfo what weight’ the vitrified Body bears, compared with the crude Body ¢ Alfo becaufe Vitrification is accounted, akind of death of Metals, what Vitrification will admit, of turning back again, and what. not ? gh be | | Pon ee For Diffolution into Liquor, we are to enguire, what is the proper | Atenfirnum to diffolve any Metal > And inthe Negative, what will touch upon the one, and not upon the other? And what feveral Menffrna will diflolve any Metal ? And which moft exactly? Item, the p of the Diffolution? The Manner of Rifing , Boiling, violent, or more gentle ? Caufing much heat, or lefs? tity or charge the Strong-Water will bear, and then Sive over Iten, the colour into which the Liqnor will turn? Above all, it is to be inquired | whether there be any Aflenfiruuea to diflolve any Metal that 43 not fretting and corroding; but openeth the Body by fympathy, and not by mordacity or Violent penetration >: re | rocefsor motion. Vaporing 2? More item’, the gquan- For {prouting or Branching , thotgh it be a thin a kind of toy or pleafure 5 yet there is amo re ferious ufe of it: For that it difcovers the delicate motions of {pirits, when they put forthand cannot get forth, like unto that which is in vegetables, For Induration or Mollification,, it is tobe enquired, what will make Metals harder and harder, and what wil] make them fofter and fofter>- And this enquiry tendethtotwoends. _Firft; for ufe; As to make Iron fof by the Fire, makes it malle- able. | - Secondly, Becaufe fnduration isa degree towards Fixations and Mol- lification towards Volatility: And therefore the inquiry of them,’ will give light towards the other, | mat For Tough and Brittle, they are much of the fame kind with the} two former, but yet worthy of an Inquiry apart - Efpecially, to joyn| Hardnefs’ to Toushnefss as making Glafs malleable, ge: And break, For: Volatility. and Fixation, it is a principal ‘Branch to be en- lown, [not endure Fire, ot malleable, but yet it The eithet [tis The Quick engui All$

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