214 fy H U M O U R S. 



or horizontal direclion, though it Is not 



the fame in refped to the fituation of the 



veflels : for when any animal is eredl^ the 



blood-veffels in the legs are more on a 



Swellings ftretch by far than when he lies down ; 



in the legs and if the vefTels are in a lax ftate natu- 



often ow- rally, or relaxed by external iniuries, they 



laxed vef- ^^'^ "^^ ^^^^ '^^ propel the fluids forward, 



fels. and hence from a retarded circulation arifes 



a fwcUing in the part affected. 



Dr. Bracken fto whom all true lovers 

 of horfes are much indebted for the 

 pains he has taken to explode falfe no- 

 tions, and embeliifli true ones) has en- 

 deavoured to fet this matter in the cleared 

 light; which indeed he has done to the 

 fatisfaclion of the unprejudiced, and of 

 every one who can underftand, and does 

 not wilfully ihut his eyes on fo clear a 

 do6lrine. 



'r^^ It would be to little purpofe therefore 



7 ^ to enforce it, unlefs the reader would be 



anatomy . ' i • r ir ^ 



abfolutely ^^ ^he pains to rorm to nimleJr a clear 

 neceflary. idea of the blood's circulation, with the 

 fecretions from it ; and confider the folids 

 as compofed of elaftic fibres, or fpringy 

 threads, which are fometimes in a lax or 

 loofe ftate, and at others in a tight or firm 

 one. 



This 



