70 The Att of Farriery 



tlfe, that a Pra6lice founded upon innate Principles, 

 occult Qualities, metaphyfical Dreams about Princi- 

 ples and Ends, ISc. is a Pradice which cannot bear 

 the Teft, but confifls in the Nugatory Produftions 

 of Reafon mifimployed. But that this was the 

 Cafe of moft of our Ancient Authors in Phyfick, 

 as well as the Science I now write upon, is too 

 plain to admit of the leaft Controverfy. 



Fourthly, I fhall fhew what is meant by a Nerve, 

 and then proceed to give an Account of the Diftem- 

 pers which afFeft all or any Parts of the Body of 

 this fo ferviceable a Creature, which I am treating 

 of.. 

 . Nerve A Nerve is a long and fmall Bundle of very fine 

 jfcnbed. Pipes or hollow Fibres, wrap*d up in the Dura and 

 Pia Mater or the two outermoft Membranes of the 

 Brain. 



The Pia Mater, which is an exceeding fine 

 thin Membrane immediately covering the Brain, 

 not only covers all the Nerves in common, but 

 alfo inclofes every Fibre in particular. 



The Medullary or Marrowy Subilance of the 

 Brain, which was by the Latins called Medulla 

 Oblongata, is that Part of the Brain within the 

 Scull upon the back Part, which is the Origin or 

 Beginning of the Spinal Marrow ; and this Medul- 

 lary Subftance is the Source and Fountain of all 

 the Nervous Syftem in Human and Brute Creatures. 

 It paffes through a Hole in the hinder Part of the 

 Scull, down the Vertebra or Bones of the Neck 

 and Back, and from thence fends out Branches to 

 theCheft, Abdomen or lower Belly, Limbs, ^c. 

 Thefpinal The Medulla Oblongata is accounted the com- 

 MarrowthCj^Qj^ ggj^CQj.y Qj. gg^^. ^f Senfation in all Animals, 

 fadonina'li^^-*^ although the Ancients imagined the Soul to 

 Animals.* have its Seat in the Stomach, by reafon of that 

 Bowel's being indued with fo exquifite a Senfation ; 

 and after them the Moderns fancied it took up its 

 Refidence in a Gland fituate upon the upper Part 

 of the Brain, found out by Pineus, and therefore 



term'd 



