C 90 r ) 
by the Air, will retain their globofity. Thus it is with the gfo- 
bu!s of the flefh, which are very fofc, as far as they are mere or 
Icfs furrounded by the Air. 
Next, I have examined that membran of the Brain , v^hich is 
call'd fia mater ^ and found, that this oiembran is permeated by 
very many little veins, befides thofe which with the naked e>e 
Vie fee upon the brain , efpecially having firft: feparated the 
thin membran from the brain, under which J have fecnrmaiJ 
veins of an admirable and incredible finencfs, and, as far as I 
was able to difcern, they confift of exceeding thin filaments. 
1 liave further obferved, that the above mem icn'd great num« 
be/ of veins, which run through the thin membran ^ diifeminate 
their ramifications thorow the brain, after the manner as vines 
Jying upon the earth fhcot roots into the ground ; imagining the 
BKainco be like tbeEarth;& theVeins liketheRoots in theEarchc: . 
Proceeding to the parts of (he Brain it felf, I muft ftill fay of 
them,erpecially where they lie any thiEg thick upon one another, 
that ihey conM of no other parts but globuls ; but where 
the Brain lay fpred very thin, cue thorougk with a Knife^ 
as if they had been feparated from one another, there they 
appeared like a very clear matter, as if it had been Oyl. 
Having view'd this n atter , 1 imagined, it was thus caufed by 
the knife,, \\ hereby the globuls of the brain had been broken i: 
But continuing my Obfervations,not only of the Brains of beafts, 
but alfo of fifbes, and particularly of a Cod-fifli , and repre° 
fencing it very plainly to my eye, I faw, that the faid oleaginous, 
matter had not been caufed by the knife, but that indeed it was a 
matter by it felf,wherein the aforefaid globuls lay. I faw more- 
over, but moft plainly in the brain of a Cod-fifli , that the fald 
oleous matter did indeed , Gonfift alfo of yet much fmaller glo- 
buls, than the other. 
The former greater globuls of the brain, are,by my eflimati* 
on, about the bignef of thofe, which I formerly faid the Blood ■ 
was made up ot (which render the blood red.) Thefe greater 
globuls, which compofethe Brain, are very irregular in refped' 
of what thofe of the Blood are : Whereof I conceive the caufe- 
to be this, that the globuls of the Brain lie clofe to one another^ 
or to the Velfels , and being very fofc do no? feparate though 
they befhaken whereas on the contrary, the fanguine globuls-' 
are moved in a more fluid matter^ and therefore^ haying elbow- 
2X}om3,keeg their roundnefs^> ' E 
