48 ^he Art of F a'r r i e r y 



cuky of changing folid Meats into Chyle ; whereas 

 it is evident, that the Serum or thin Part of the 

 Blood, is not a fit Menjlruui7i or Dillblvent for the 

 Solution of Bread, Meat, or Herbs. But this Af- 

 fair will be better underllood from confidering, the 

 never-to-be-forgotten, and juftly celebrated Mr. 

 Bc^leh Difcourle upon a Machine for Digellion, as 

 defcribed by Rapin ; wherein, without the Help of 

 any Ferment, but by the Affiftance only of Heat 

 ( and the PrefTure of rarefied Air confined, ) Bones 

 and Flefh, with the Addition of a fmall Portion of 

 "Water, are turned into a Jelly, where nothing is 

 wanting to its being made real Chyle, but the rough 

 Superficies of a Body to grind and often fhake it 

 about. 



■ The Chyle thus made, wafhes over the Pylorus 

 or lower Orifice of the Stomach, into the Inteftinal 

 Tube or Gut called Duodenum, which in Horfes is 

 26 or 27 Yards in Length, and wider than in Oxen : 

 It is fomething narrower for about a Foot and an 

 half from the Stomach, where the Porus Eiliarius or 

 Gall-Pipe, and Pancreatic Du6i or Pipe which car- 

 ries a Juice into this Gut from the Sweet-Bread, en- 

 ter : After this the Chyle is (by thtPcriJialtick or 

 Worm-like Motion of the Guts, and Preflure of the 

 Diaphragm, along with the Help of the Mufcles of 

 the Abdomen or lower Belly,) ftrained through the 

 narrow Orifices of the Lafteal Veins, while the 

 grofifer Parts continue their Motion downwards, (or 

 rather backwards in a Horfe, ) until they are quite 

 ejefted by Stool ; what paffes through the Lafleal 

 VefTels, is carried by them into the Glands of the 

 Mefentery, where they receive a fine thin Lymph 

 from the Lymphaticks, whereby the Chyle is fo di- 

 luted, that it paffes eafier the reft of its Courfe : 

 For, beyond the firft Glands, I mean the firft in the 

 Mefentery or Net, thefe Lymphatick VelTels unite 

 in larger Canals, and thofe in ftill larger, until at 

 laft it arrives (that is this thin Lymph) at the Re- 

 ceptaculum Chyli or common Receptacle o^ the 



Chvlc, 



