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SECT. XXX. 



OF SANGUIFICATION. 



444. THERE is scarcely occasion to remark that we 

 employ the term Sanguification to denote the assimi- 

 lation of the chyle to the blood, and the constant repa- 

 ration, by means of the former, of the constant loss 

 sustained by the latter. 



445. The division of all our fluids into three classes 

 (45) crude, sanguineous, and secreted, turns upon this ; 

 that the middle class contains the stream of the vital 

 fluid itself, from which the numerous secreted fluids 

 are perpetually withdrawn, and to which, on the other 

 hand, there is a constant afllux of chyle and lymph 

 from the absorbent system. 



44(>. But since the blood is a peculiar fluid, sui 

 generis, without its fellow in nature, various assistances 

 and media are evidently requisite to subact and assi- 

 milate the heterogeneous and foreign fluids which pass 

 to it from the thoracic duct. 



447. This is, in the first place, especially in the me- 

 senteric and other conglobate glands, favoured by those 

 windings, mentioned formerly, of the lacteals and 

 lymphatics, which are, at the same time, gradually more 

 impregnated, as it were, with an animal nature. 



448. We must also take into consideration, that a 

 great part of the lymph which enters the left subclavian 

 after its admixture with the intestinal chyle in the 

 thoracic duct, has been derived from the substance of 



