< 9o§ ) 
colour, whereas thofe in the Medulla w€re clearer and more 
tranfparent. 
I have feen in the Brain, and moft in the Cortical part, Tuch 
Sinall fanguineous veffels being red (which came out of bigger 
ones) that I cannot comprehend, how the globuls could pais 
through them - and, (what is more,) when you feecheBlood- 
globuls fing!e,they have little or no colour , whereas oo the con- 
trary the blood in thefe fmall veins was yet red : Yea, the red 
colour penetrated tfcrongh che veins 5 and coloured t he neigh^ 
bouring parts of the brain red. Buc reflefling on my former 
obfervations about Lke, i there faw divers times, that when I 
madea Loufe hungry, and then fet heron to fyck blood, (be 
could nor difpofe of, nor digeft, all the blood ; whence ir catrie 
ro pafs, that che blood^globuls^ which rendred it red , came to 
difTolve in the fluid niatter,and fo changed the blood into a more 
fluid matter ; and this blood came to diffufe it fejf through the 
whole body of theLoufe, and through the very feet and horns, 
and to colour them red. The caufe, why the blood was not con- 
fumed in the Lou^feJ imagined to-be, becaufe the guts, or fmall 
veins in the Loufe,had been for want of food dried up, whence 
the fame was hindred from its due motion , nor could be duly 
conveyed through the body. Yet this change of blood (I very 
well remember) hath at other times been obferved by me, when 
the blood had flood a while in a Glafs. And thus it may be ot 
become red in the fmall veins of the Brain , though they be fo 
flender, that no globuls , keeping their roundnefs, can pafs 
through them. 
I have alfaobferv'd the Spimlmarmp ofa Ca!f,Pu!Iet,Sheep, 
and Cod-fifli which I have found to confift of no other parts 
thanthofeof the Brain; yet with this difference, thatjbefides 
the related globuls in the Brain, there lay in the Spinal marrow 
a great number of fliining oleaginous g!obuls,of divers bigneflTes^ 
fomeof them 50 times bigger than others; and thofe alfo very 
foft and fluid. Thefe fpinal marrows were alfo furniihed with 
exceeding thin and manifold fmall veins or vefTels ; and befides 
thefe very fmall veins, there ran up and down along thefe fpinal 
marrows brown filaments, of the thicknefs of the hair of ones 
head, and thinner. Thefe being feen by me, I imagined firft, 
whether fuchfilamentmight not be a vein; but having further 
\vith great ajtteDtion inquired into it; that each fi- 
6 G lament 
