§2 ^pje Art of Fakriekv 



performed by Andrenv Snape, who was Farrier to- 

 King Charles the Firft : But we are moft beholden 

 to the famous Malphighi, for a Defcription of this 

 particvtlar Part of the Body. This ingenious Perfon^ 

 nicely examined what we call the Cortical Subflance 

 of the Brain, and difcover*d that it was nothing but 

 a Heap of little Oval Glands that receive the Ca- 

 pillary Branches of the Veins and Arteries which 

 belong to the Brain, and which fend out an infinite 

 Number of Fibres, that all together make up the 

 Medullary Subftance ; which going out of the back 

 Part of the Cranium or Scull, forms the Nerves and 

 th.Q Medulla fpinalis or fpinal Marrow, contained in- 

 the Vertehrcs or Bones of the Back. 



I fay, a thorough Account of the Brain would 

 l>e too tedious in this Place, and (unlefs the Reader 

 underflood Anatomy) the Defcription would be of 

 no Service to him ,• for there is no fuch Thing as 

 any Perfon's learning Anatomy by Theory only, 

 which makes me avoid as m.uch as polTible any 

 Thing of that Kind, which may be thought unne- 

 cefTary. Yet I muft not omit now and then to de- 

 clare the admirable Mechanifm and Contrivance of 

 the Creator of the Univerfc, with relation to the 

 Bodies cii Animals. And, as I remember, I have 

 before hinted, that a Vein and an Artery go in 

 Company all over the Body j only the Arteries are 

 better guarded from Injuries by being placed deep- 

 er or under the Veins, ( fo indeed they are, gene- 

 rally fpeaking j ) but, in entering the Scull, they 

 fpread themfelves upon the Brain r and in this Place 

 they dilier, for mighty Rcafons, in^. that liad the 

 Veins entered the Scull by the fame Holes with the 

 Arteries, it would have fallen out, that upon any 

 Turgefcence or Swelling of the Blood- VefTels, the 

 Swelling and Pulfe of the Arteries would comprefs 

 the Veins againfl the bony Sides of their PalTage, 

 and fo caufe a Stagnation and Extravafation, or Lofs 

 £)f Blood within the Brain ; which would foon be 

 Ihe Defbudlion of the whole Machine* Neither do. 



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