[889] 
tht Medullary parts here, confift chiefly of very fmall 
ftreakes or Veffells, together with many fiuall blood Vef« 
fells, as in the reft of the brain: otherwife they differed 
little, from the lame parts of an Ox^Sheep, or Turkey ; 
as I have before defcribed them, only, the transparent 
Oyl-like Globules, were not fo larger but, when lob- 
ferved the brain of a Sparrow, which had been 24 hours 
dead, I faw the tranlparent OyMike Globules, as grear^ 
asthofe in the brain of an Ox, or other Animals. From 
this laft, and other Obfervations, I have been confidering, 
whether this great number of clear tranfparent Globules^ 
might not,_when the Animal wa^ alive, have been de- 
figned to feed the Medulla Spinalis and Nerves : tho' now 
that Animal is dead, and the humours ceafe to fiowj the 
particles that toucht one another, congeal into figures of 
different fizes : For the blood that is carryed by the Ar- 
tery's, into the tbr^^V^/ part of the brain, does not return / ^ 
thence, by the Veins, but is prepared in the Capillary 
Veflels, till it be fit for the nourilhment of the Medul- 
lary parts. 
This may feem ftrange to fome, who might objed that 
because of the rednefs of the blood, the brain ought to 
be reddifh of colour >• but that folio weth not ; for the 
green Globule3,of greenifh fliegm or fnot,are truely blood 
Globules, which have changed their colour, being ftillof 
the fame fize with them, and coniifting each of d diftind: 
Globules, as they doe: and I conclude that as thefe are 
changedjfrom red into green, that alfo, as likely the red. 
may loole their colour , and become whiter efpecially 
when they are divided into very fmall parts as they muft 
.be, before they pafs into the Capillary Veflels. 
I have lately examined the Ghryftalline humour of thp 
Eye of a Man, that I might know, whether the fmall 
threds of the Scales, wind about in the fame manner, as 
I have formerly defcribed them, in the Eyesof beafts: 
but I could not difcern the true conftitution thereof, 
I 2 notvvithftaiiding 
