Full text: Bacon, Francis: Sylva sylvarum

Century VIII. draw his Breath. Another cauſe may be, for that Cold calleth the Spiritsto
ſuccor; and therefore they cannot ſo well cloſe, and go together in the
Head, which is ever requiſite to Sleep And for the ſame cauſe, Pain and
noiſe hinder ſleep, and darkneſs (contrariwiſe) furthereth ſleep.


in Conſort,

Some noiſes (whereof we ſpake in the 112 Experiment) help Sleep; as
the blowing of the Wind, the trickling of Water, humming of Bees, ſoft
ſinging reading, & c. The cauſe is, for that they move in the Spirits a gen-
tle attention; and whatſoever moveth attention, without too much labor,
ſtilleth the natural and diſcurſive motions of the Spirits.



Sleep nouriſheth, or at leaſt preſerveth, Bodies a long time, without
other nouriſhment. Beaſts that ſleep in Winter, (as it is noted of wilde
Bears) during their ſleep wax very fat, though they eat nothing. Bats
have been found in Ovens, and other hollow cloſe places, matted one
upon another; and therefore it is likely that they ſleep in the VVinter
time, and eat nothing. Quare whether Bees do not ſleep all VVinter, and
ſpare their Honey. Butter-flies, and other Flies, do not onely ſleep, but
lie as dead all VVinter; and yet with a little heat of Sun or Firerevive again. A Dormouſe, both VVinter and Summer will ſleep ſome days together,
and eat nothing.



TO reſtore Teeth in Age, were Magnale Naturæ, it may be thought
of; but howſoever, thenature of the Teeth deſerveth to be enquired
of, as well as the other parts of Living Creatures Bodies.


in Conſort,
Teeth and
hard subſton.
@es in the
Bodies of Li-
ving Crea.

There be five parts in the Bodies of Living Creatures that are of hard ſub-
ſtances; the Skull, the Teeth, the Bones, the Horns, and the Nails. The greateſt
quantity of hard ſubſtance continued, is towards the Head; for there is the
Skull of one entire Bone, there are the Teeth, there are Maxillary Bones,
there is the hard Bone that is the Inſtrument of Hearing, and thence iſſue
the Horns. So that the building of Living Creatures Bodies is like the build-
ing of a Timber-houſe, where the VValls and other parts have Columns
and Beams; but the Roof is in the better ſort of Houſes, all Tile, or Lead,
or Stone. As for Birds, they have three other hard ſubſtances proper to them; the Bill, which is of the like matter with the Teeth, for no Birds have Teeth; the Shell of the Egg, and their Quills; for as for their Spur, it is but a
Nail. Butno Living Creatures that have Shells very hard (as Oyſters, Cockles,
Muſtles, Shalops, Crabs, Lobſters, Craw-fish, Shrimps, and eſpecially the Tortoiſe)
have Bones within them, but onely little Griſtles.



Bones, after full growth, continue at a ſtay, and ſo doth the Skull. Horns,
in ſome Creatures, are caſt and renewed: Teeth ſtand at aftay, except their
wearing. As for Nails, they grow continually, and Bills and Beaks will over-
grow, and ſometimes be caſt, as in Eagles and Parrots.



Moſt of the hard ſubſtances flie to the extreams of the Body; as Skull,
Horns, Teeth, Nails, and Beaks; onely the Bones are more inward, and clad
with Fleſh. As for the Entrails, they are all without Bones, ſave that a Bone
is ſometimes found in the Heari of a Stag, and it may be in ſome other



The Skull hath Brains, as a kinde of Marrow within it. The Back-bone
hath one kinde of Marrow, which hath an affinity with the Brain; and
other Bones of the Body have another. The Faw-bones have no Marrow fe-
vered, but a little Pulp of Marrow diffuſed. Teeth likewiſe are thought to
have a kinde of Marrow diffuſed, which cauſeth the Senſe and Pain: But it


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