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

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9965Century III. of Metals; and ſo doth Time, as in the Ruſt of Metals. But generally Heat
doth that in ſmall time, which Age doth in long.

SOme things which paſs the Fire, are ſoft eſt at ſirſt, and by Time grow
11295. hard, as the Crum of Bread. Some are harder when they comeſrom the
22Experiment
Solitary,
touching the
Differing Ope-
rations of Fire,
and Time. Fire, and after wards give again, and grow ſoſt as the Cruſt of Bread, Bisker;
Sweet-Meats, Salt, & c. The cauſe is, for that in thoſe things which wax
hard with Time, the work of the Fire is a kinde of melting; and in thoſe
that wax ſoſt with Time, (contrariwiſe) the work of the Fire is a kinde
of Baking; and whatſoever the Fire baketh, Time doth in ſome degree
diſſolve.

MOtions paſs from one Man to another, not ſo much by exciting Ima-
33296. gination as by Invitation, eſpecially iſ there be an Aptneſs or Incli-
44Experiment
Solitary,
touching
Motions by I-
mitation. nation before. Therefore Gaping, or Yawning, and Stretching, do paſs
from Man to Man; for that that cauſeth Gaping or Stretching is, when the
Spirits are a little Heavy, by any Vapor, or the like. For then they ſtrive (as
it were) to wring out, and expel that which loadeth them. So Men drowzy
and deſirous to ſleep; or before the ſit of an Ague, do uſe to yawn and
ſtretch, and do likewiſe yield a Voice or Sound, which is an Interjection
of Expulſion: So that if another be apt and prepared to do the like, he
ſolloweth by the ſight of another. So the Laughing of another maketh to
laugh.

THere be ſome known Diſeaſes that are Infectious, and others that are
55297. not. Thoſe that are inſectious, are ſirſt, Such as are chieſly in the Spi-
66Experiment
Solitary,
touching In-
fectious diſ-
eaſes. rits, and not ſo much in the Humors, and therefore paſs eaſily from Body to
Body; ſuch are Peſtilences Lippitudes, and ſuch like. Secondly, ſuch as taint
the breath, which we ſee paſſeth manifeſtly from Man to Man, and not in-
viſible as the affects of the Spirits do; ſuch are Conſumptions of the Lungs,
& c. Thirdly, Such as come forth to the skin, and therefore taint the Air,
or the Body adjacent; eſpecially, if they conſiſt in an unctuous ſubſtance,
not apt to diſſipate; ſuch are Scabs, and Leproſie. Fourthly, ſuch as are
meerly in the Humors, and not in the Spirits, Breath, or Exhalations: And
thereſore they never infect, but by touch onely; and ſuch a touch alſo, as
cometh within the Epidermis, as the venome of the French Pox, and the biting
of a Mad-Dog.

MOſt Powders grow more cloſe and coherent by mixture of Water, than
77298. by mixture of Oyl, though Oyl be the thicker Body; as Meal, & c.
88Experiment
Solitary,
touching the
Incorporation
of Powders
and Liqnors. The reaſon is the Congruity of Bodies, Which if it be more, maketh aper-
ſecter imbibition, and incorporation; which in moſt Powders is more between
them and Water, than between them and Oyl: But Painters colours
ground, and aſhes, do better incorporate with Oyl.

MUch Motion and Exerciſe is good for ſome Bodies, and ſitting and
99299. leſs motion, ſor others. If the Body be hot, and void of ſuperſluous
1010Experiment
Solitary,
touching Ex-
erciſe of the
Body. Moiſtures, too much Motion hurteth; and it is an error in Phyſitians, to
call too much upon Exerciſe. Likewiſe, Men ought to beware, that they
uſe not Exerciſe, and a ſpare diet, both; but if much Exerciſe, then a plenti-
ſul diet; and if ſparing diet, then little Exerciſe. The Beneſits that come of
Exerciſe are. Firſt, that it ſendeth nouriſhment into the parts more forcibly.

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