Of the GREASE. 285 



cant of humours. We have already ex- 

 plained our meaning on this fubje6l in 

 a preceding chapter, and fhall here only 

 oblerve, that the blood and juices (or 

 humours^ for there are always fome in the 

 bed ftatc of blood) are brought to the 

 extreme parts by the arteries, and re- 

 turned by the veins •, in which latter, the 

 blood is to rife in perpendicular columns, 

 to return the circulating fluids frorri the 

 extremities: hence fwellings in the legs ^<>^^. 

 of hcrfes may eafily be accounted for, i),^^|,'g"^"' 

 from a partial ftagnation of the blood limbs are 

 and juices in the tiner velTels, where thecccafioa- 

 circulation is moft languid; and efpeci- ^^• 

 ally when there is want of due exercife, 

 and a proper mufcular comprefiion on the 

 yeflels, to pufli forward the returning 

 bloody and propel the inert and haifftag- 

 nating tiuids through their vefTels ; in 

 fhorr, the blood in luch cafes cannot fo 

 readily ^fcend as defcend, or a greater 

 ' quantity is brought by the arteries thati 

 can be returned by the veins. 



The greafe then, confidered in this The 

 light, mud be treated as a local com- g^^a^c, 

 plamt, where the parts aff'eded .ire ^alone \^^^ ^ 

 concerned, the blood and juices being times be- 

 yet untainted, and in good condition -, treated as 

 or as a diforder where they are both com- '^c^^- 



plicated: 



