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

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33153The Hiſtory of Life and Death. which ſhe deſireth to expel the foggy air drawn into the Lungs, and to take in new,
ſcarce the third part of a minute.
Again, the beating of the Pulſe, and the motion of the Syſtole and Diaſtole of the
1116. heart, are three times quicker than that of breathing:
inſomuch that if it were poſſi-
ble that that motion of the heart could be ſtopped without ſtopping the breath, death
would follow more ſpedily there upon than by ſtrangling.
Notwithſtanding, uſe and cuſtom prevail much in this natural action of breathing;
2217. as it is in the Delian Divers and Fiſhers for Pearl, who by long uſe can hold their breaths
at leaſt ten times longer than other men can do.
Amongſt living Creatures, even of thoſe that have Lungs, there are ſome that are able
3318. to hold their breaths a long time, and others that cannot hold them ſo long, according
as they need more or leſs refrigeration.
Fiſhes need leſs refrigeration that Terreſtrial Creatures, yet ſome they need, and
4419. take it by their Gills.
And as Terreſtrial Creatures cannot bear the air that is too
hot or too cloſe;
ſo Fiſhes are ſuffocated in waters if they be totally and long
frozen.
If the Spirit be aſſaulted by another heat greater than it ſelf, it is diſſipated and de-
5520. ſtroyed;
for it cannot bear the proper beat without refrigeration, much leſs can it
bear another heat which is far ſtronger.
This is to be ſeen in burning-Fevers, where
the heat of the putrefied humours doth exceed the native heat, even to extinction or
diſſipation.
The want alſo and uſe of Sleep is referred to Refrigeration. For Motion doth atte-
6621. nuate and rarifie the ſpirit, and doth ſharpen and increaſe the heat thereof;
contra-
rily, sleep ſetleth and reſtraineth the motion and gadding of the ſame:
for though
Sleep doth ſtrengthen and advance the actions of the parts and of the liveleſs ſpi-
rits, and all that motion which is to the circumference of the body;
yet it doth in
great part quiet and ſtill the proper motion of the living Spirit.
Now ſleep regu-
larly is due unto humane nature once within four and twenty hours, and that for ſix
or five hours at the leaſt:
though there are, even in this kind, ſometimes miracles of
Nature;
as it is recorded of Mecanas, that he ſlept not for a long time before his
death.
And as touching the want of Refrigeration for conſerving of the Spirit thus
much.
As concerning the third Indigence, namely of Aliment, it ſeems to pertain rather to
7722. the parts than to the living Spirit;
for a man may eaſily believe that the living Spirit
ſubſiſteth in Identity, not by ſucceſſion or renovation.
And as for the reaſonable Soul
in man, it is above all queſtion that it is not engendred of the Soul of the Parents, nor is
repaired, nor can die, They ſpeak of the Natural spirit of living Creatures, and alſo
of Vegetables, which differs from that other Soul eſſentially and formally.
For out of
the confuſion of theſe that ſame tranſmigration of Souls, and innumerable other devices
of Heathens and Hereticks have proceeded.
The Body of man doth regularly require Renovation by Aliment every day, and a
8823. body in health can ſcarce endure faſting three days together;
notwithſtanding uſe and
cuſtome will do much even in this caſe:
but in ſickneſs faſting is leſs grievous to the
body.
Alſo Sleep doth ſupply ſomewhat to nouriſhment; and on the other ſide
Exerciſe doth require it more abundantly.
Likewiſe there have ſome been found
who ſuſtained themſelves (almoſt to a miracle in nature) a very long time without
meat or drink.
Dead Bodies if they be not intercepted by putrefaction, will ſubſiſt a long time with-
9924. out any notable Abſumption;
but Living bodies not above three days, (as we ſaid) un-
leſs they be repaired by nouriſhment:
which ſheweth that quick Abſumption to be
9696[Handwritten note 96] the work of the living spirit, which either repairs it ſelf, or puts the parts into a ne-
ceſſity of being repaired, or both.
This is teſtified by that alſo which was noted a little
before, namely, that living creatures may ſubſiſt ſomewhat the longer without Aliment
if they ſleep:
now ſleep is nothing elſe but a reception and retirement of the living
Spirit into it ſelf.
An abundant and continual effluxion of blood, which ſometimes happeneth in
101025. the Hæmorrhoides, ſometimes in vomitting of blood, the inward Veins being
unlocked or broken, ſometimes by wounds, cauſeth ſudden death, in regard that
the bloud of the Veins miniſtreth to the Arteries, and the bloud of the Arteries
to the Spirit.

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