Bacon, Francis, Sylva sylvarum : or, a natural history in ten centuries

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9864Natural Hiſtory;
MEtals give orient and fine Colours in Diſſolution; as Gold giveth an
11291. excellent Yellow, Quick-ſilver an excellent Green, Tingiveth an
22Experiment
Solitary,
touching the
Orient Colours
in Diſſolution
of Metals.
excellent Azure.
Likewiſe in their Putrefactions, or Ruſts; as Vermilion,
Verdegreaſe, Biſe, Cirrus, &
c. And likewiſe in their Vitrifications. The
cauſe is, for that by their ſtrength of Body, they are able to endure the Fire,
or Strong-waters, and to be put into an equal poſture, and again, to retain
part of their principal Spirit:
Which two things (equal poſture, and quick
Spirits) are required chiefly, to make Colours lightſome.
IT conduceth unto long Life, and to the more placide Motion of the Spi-
33292. rits, which thereby do leſs prey and conſume the Juyce of the body:
44Experiment
Solitary,
touching
Prelongation
of Life.
either that Mens actions be free and voluntary, that nothing be done invitâ minerva,
but ſecundum genium;
or, on the other ſide, that the Actions of Men be full of Re-
gulation, and commands within themſelves:
For then the victory and performing
of the command, giveth a good diſpoſition to the Spirits, eſpecially if
there be aproceeding from degree to degree, for then the ſenſe of victory
is the greater.
An example of the former of theſe, is in a Countrey life;
and of the latter, in Monks and Philoſophers, and ſuch as do continually enjoyn
themſelves.
IT is certain, that in all Bodies, there is an Appetite of Vnion, and Evitation
55293. of Solution of Continuity:
And of this Appetite there be many degrees,
66Experiment
Solitary,
touching
Appetite of
Vnion in
Bodies.
but the moſt remarkable, and fit to be diſtinguiſhed, are three.
The firſt
in Liquors, the ſecond in hard Bodies, and the third in Bodies cleaving
or tenacious.
In Liquors this Appetite is weak; we ſee in Liquors, the
Threding of them in Stillicides (as hath been ſaid) the falling of them in
round drops (which is the form of Union) and the ſtaying of them for a lit-
tle time in Bubbles and Froth.
In the ſecond degree or kinde, this Appetite
is ſtrong;
as in Iron, in Stone, in Wood,& c. In the third, this Appetite is in
a Medium between the other two:
For ſuch Bodies do partly follow the
touch of another Body, and partly ſtick and continue to themſelves;
and
therefore they rope and draw themſelves in threds, as we ſee in Pitch, Glew,
Birdlime, &
c. But note, that all ſolid Bodies are cleaving more or leſs; and
that they love better the touch of ſome what that is tangible, than of Air.
For Water in ſmall quantity cleaveth to any thing that is ſolid, and ſo would.
Metal too, if the weight drew it notoff.
And therefore Gold Foliate, or
any Metal Foliate, cleaveth:
But thoſe Bodies which are noted to be
clammy, and cleaving, are ſuch as have a more in different Appetite (at once)
to follow another Body, and to hold to themſelves.
And therefore they are
commonly Bodies ill mixed, and which take more pleaſure in a Foreign Body,
that in preſerving there own conſiſtence, and which have little predominance
in Drought or Moiſture.
TIme and Heat are fellows in many effects. Heat drieth Bodies that do
77294. eaſily expire;
as Parchment, Leaves, Roots, Clay, & c. And ſo
88Experiment
Solitary,
touching the
like Operations
of Heat and
Time.
doth Time or Age areſie;
as in the ſame Bodies, & c. Heat diſſolveth and
melteth Bodies that keep in their Spirits, as in divers Liquefactions;
and ſo
doth Time, in ſome Bodies of a ſofter conſiſtence:
As is manifeſt in Honey,
which by Age waxeth more liquid, and the like in Sugar;
and ſo in old
Oyl, which is ever more clear and more hot in medicinable uſe.
Heat
cauſeth the Spirits to ſearch ſome iſſue out of the Body, as in the Volatility

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