Chap. IV. The Anato?ny of aWOlkS^. 43 



and are formM with other Branches in feveral Plexus's , as 

 thofe laft dcfcribed, but not fo numerous. They take their 

 Courle chiefly to the Mefentery and Loins, ending towards 

 the f'undament in feveral Imall Twigs. 



Having defcribed the Nerves which take <^^^ l^erv^s 

 their Origin within the Skull, we proceed in ^j^hich arife 

 the next Place to thofe which derive their ^rsUhout the 

 Beginning from between the Joinings of the ^kull. 

 Neckj Back, and Loins, which fliall, in a 

 Manner, be but jull named; they being in Number thirty- 

 feven, v/hcreof feven arife from the Neck, feven teen from 

 the Back, and thirteen from the Loins and Os Sacrum, 



Thofe of the Neck are all of them difperfed, partly oa 

 the Mufcles of the Face, partly on the Mufcles of the Neck 

 itfelf, and partly on thofe of the Shoulders and Fore-legs; 

 only it is to be remarked, that a Twig from each Nerve 

 of the fifth Pair, being joined with the like Twigs of the 

 fourth and fixth, compofe that remarkable Nerve, which 

 goes to the Midriff, called the Nervus phrenicus. 



The firll two Pair, which arife from between the Ver-- 

 tehrae of the Back, communicate with the lowermoft of the 

 Neck, fending forth fome Twigs to the Neck and Shoul- 

 ders : The fecond, as alfo all that follow, fend each of them 

 a Twig to the Intercolfal Nerve, or Nerve of the ninth 

 Pair, their other Branches being chiefly fpent on the Inter- 

 cofldl Mufcles, and Mufcles of the Back ; with fome fmall 

 Slips towards thofe of the lower Belly. 



As thefe are chiefly diiperfed among the Mufcles of the 

 Back, and the Litercoftal, and the Mufcles of the lower 

 Belly, fo thofe of the Loins, and thofe alfo which fpring 

 from the Os Sacrurn^ are diiperfed into the Mufcles of the 

 Loins, Hips, and hinder Legs, only that the anterior^ or fore- 

 branches of the lirfl Pair of the Loins, are fpent on the flefhy 

 Part of the Midriff, and the Mufcle Pfoas^ and the pofterior 

 Branches on the Mufcle called the Longijffimus Dorfi, 



The Yard of a Horfe, and the Womb of a Mare, are 

 alfo furniflied from tlie anterior Branches of the Loins, and 

 the Stones from the a?iterior Branches of the Os Sacrum^ 

 fent oli' to them from the fore-part of the Thigh. 



§ IV. Of the Eyes, and their feveral Parts. 

 Every one knows that the Eyes are the Organs ^e Eyes, 

 or Inftruments of feeing the Ideas of all outward 

 Objects being conveyed by ihem to the common Senfory. 



They 



