©/■HUMOURS. 215 



This knowledge "A^ould foon convince 

 him, that the extreme parts may be 

 fwelled without humours faljing down 

 upon them, from a difficulty in the circu- 

 lation (as before explained) to puQi en 

 blood in perpendicular columns, or from 

 a laxity of the veflels themfelves. 



In order ro make this do6lrine as fa- The fall- 

 miliar as pofiible, let us fuppofe that a ingrown 

 man, or horfe, in perfe6l health, whofe ° ' 



, , T 1 • • *■ . I in T mours ex- 



blood and juices are in the belt condi- pi^ined 



tion, receives a violent blow on the leg, by a fa- 

 the confequence of which is a bruife, and miliar 

 fwelling : if the limb of either is kept in *^^^^* 

 a perpendicular fituation with little or 

 no motion, the fwelling will continue ; 

 and we may fay, if we pleafe, the bu- 

 mours are fallen into it: but change only 

 the pofition, and continue the limb of 

 either in a fupine or level one ; the fwell- 

 ing will then foon abate, and the humours 

 difappear. In this cafe, where were the 

 humours before the accident ; how came 

 they \o fuddenly to the injured limb, and 

 fo foon to difappear ? Is it not more rea- 

 fonable to fuopofe the fwelling arofe from ^^^^^^'"gs 



o accounted 



a retarded circulation in the part injured, for from 

 the vefTels by the violence of the blow retarded 

 having loll their tone, and were fo pre- circula. 



P 4 terna- ^^°"- 



