158 MicroGRauHpPta. 
and from the Poloniax difeafe one may believe them fuch, yet I think we 
have not the leaft encouragement to either from the A@erofcope, much le 
pofitively to aflert them fuch. And perhaps the very effence of the Plica 
Polénica may be the hairs growing hollow, and of an unnatural com 
ftitution. 7 = , ; 
_ And as for the Avalogie, though I am apt enough to think that thehairs 
_ of feveral Animals may be perforated fomewhat like a Cane, or at leaft 
have a kind of pith in them, firft, becaufe they feem as ’twere a kind of Ves» 
getable growing on an Animal, which growing,they fay, remains a k 
while after the Animal is dead, and therefore fhould like other Vege- 
tables havea pith 3 and fecondly, becaufe Horns and Feathers, and Por- 
cupine’s Quils, and Cats Brifles, and the long hairs of Horfes,which come 
very neér tlie natute ofa mans hair,feem all of them to have a kind of pith, 
fome of them to be porous,yet I think it not (in thefe cafes,where we 
have fuch helps for the fenfe as the Aécrofcope affords) fafe concluding 
or building on more then we fenfibly know, fince we may,with exami- _ 
ning, find that Nature does in the make of the fame kind of fubftance, 
often vary her method in framing of it : Inftances enough to confirm this 
we may find in the Horns of feveral creatures: as what a vaft difference 
isthere between the Horns of an Oxe, and thofe of fome forts of Staggs 
as to their fhape? and even in the hairs of feveral creatures, we finda — 
vaft difference 5 as the hair of a man’s head feems, as I faid before, long, 
Cylindrical and fometime a little Prifmatical, folid or impervious, and 
very {mall ; the hair of an Isdiaz Deer (a part of the middle of which is 
defcribed in the third Figure of the fifth Scheme, marked with F)isbig- 
ger in compafs through all the middle of it,then the Brifle of an Hogg,but 
the end ‘of it is fmaller. then the hair of any kind of Animal (as may be ~ 
feen by the Figure G) the whole belly of it, which is about two or three 
Inches long, looks to the eye — of courfe Canvafs, that has 
been newly unwreath’d, it being 81 wav'd or bended toand fro, much 
after that manner, but through the AGcro/cope, it appears all perforated 
from fide to fide,and Spongie, like:a’{mall kindof fpongy Coral, whichis 
often found upon the Exglifhthores; but though I cut it a 
could not perceive that it had any pores that ran the long~way of the 
hairt the long hairs of Horfes CC and D, feem CyKndrical and fomewhat 
pithy 5 the.Brifles of a Cat B, are conical and pithy: the Quilsof Por- 
cupinesand Hedghoggs, being cut tranfverlly, have a whitith pith, inthe 
manner of a Starr,or Spur-rowel : Piggs-hair (A) is fomewhat triagondl, 
and feems tohaveneither pith nor pore: And other kinds of hair have 
quite a differing ftructure and form. And thereforel think it no wa 
agreeabletto a true natural Hiftorian, to pretend to be fo fharp-fighted. 
as to fee what a pre-conceiv’d Hypothefis tells them fhould be there.where 
another man, though perhaps as feemg, but not foreftall’d, can diftover 
~ But toproceeds Lobferv’d feveral kind of hairs that had been Dyed, 
"> and found them to be a kind of horny Cylinder, -being'of muchabout the 
tranfparency of a/pretty cleer pieceof Oxe horns thefe a at 
+. ugn- 
é 
