Fn crite ‘ —= a Se. 
Century V LLL. ( LS% 
| draw his Breath. Anothercaufe may be, for that Cold calleth the Spirits to 
}{uccor; and therefore they cannot fo well clofe, and go together in the 
| Head, which is ever requifite toSleep And for thefame cauic, Pain and 
noife hinder fleep, and darknelfs (contrariwife) furthercth flecp. 
|. Some noiles (whereof we fpakeinthe 112 Experiment)help Sleep; as|. 745. | 
} the blowing of the Wind, the trickling of Water, humming of Bees, foft 
| finging, reading, &c. The caule is, forthat they move inthe Spirits a gen- | 
‘tle attention ; and whatfoever moveth attention, without too much labor, | 
| Rtilleth the natural and difcurfive motionsof the Spirits. 
Sleep nourifheth, or at leaft preferveth, Bodies longtime, without| -746. | 
}other nourifhment. Beafts that fleep in Winter, (as it is notcdof wilde 
| Bears) during their fleep wax very fat, though they eat nothing. Bats 
jhave been found in Ovens, and other hollow clofe places, matted one 
| upon another ; and therefore it is likely that they fleep in the VVinter 
| time,and eat nothing. Quere whether Bees donot fleep all VVinter, and 
| {pare their Honey. Butter-flies, and other Flies, do not onely fleep, but 
| lic asdeadall VVinter; and yet with a little heatof Sun or Fire revive again: 
1A Dormoufe, both VVinter and Summer will fleep fome days together, 
‘| and eat nothing. ) 3 
{0 reftore Teeth in Age, were CUagnale Nature, it may be thought epernen 
of; but howfoever, thenature of the Tecth deferveth to be enquired ees 
jof, as wellas the other parts of Living Creatures Bodies. Teeth and 
hard Subfian. | 
: There be five parts in the Bodies of Living Creatures thatare of hard fub- ies ii- 
| ftances ; the Skull, che Teeth, the Bowes, the Horns; arid the Nails. The Greatelt | ving Creas 
tures. 
{ quantity of hard fubftance continued, istoivards the Head 5 for there is the a7 
{ Skullof one entireBone, there arethe Teeth, there are Maxillary Bones, 
| there is the hard Bone that is the Inftrument of Hearing, and thence iflue 
[the Horns. So that the building of Living Creatures Bodies is like the build- 
ing of a’ Timber-houfe; where the VValls and other parts have Columns | 
and Beams; butthe Roof is inthe better fortof Houfes, all Tile, ot Lead, 
or Stone. As for Birds,they have three other hard fubftances proper to them, 
| the Bill, which is of the like matter with the Teeth,for no Birds have Teeth ; 
ithe 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 Oy/eers, Cockles, 
| Atuftles, Shalops, Crabs, Lobfters, Craw-fish, Shrimps, and efpecially the Zortoife) 
| have Bones within them, but onely little Griffies. 
Bones, after full growth, continue ata ftay, and fo doththe Skull. Horns, 
| infome Creatures, arecaft and renewed: Teeth ftand at aftay,except their 
| wearing. As for Nails, they grow continually, and Bills and Beaks will over- 
| grow, and fometimes be caft, asin Eagles and Parrots. 
.. Moft of the hard fubftances flie to the extreams of the Body; ag Skull; 
| Horns, Tecth, Nails, and Beaks; onely the Bonesare thore inward, andclad 
} with Flefh. Asfor the Entrails, they are all without Bones, fave that a Bone 
jis fometimes found in the Heart of a Stag, and it may be in fome* other 
steatures. ; . 
The Skull hath Brains, as a kinde of Marrow within it. The Back-bone 
hath one kinde of Marrow, which hath an affinity wich the Brain ; and 
other Bones of the Body have another. The Faw-bones have no Adariow fe- 
fvered, buta little Pulp of Azsrrow diffufed. Teeth likewife are thought to 
jhave akinde of AGrrow diffufed, which caufeth the Senfe and Rain: But it 
ati ; P is 
