306 HUNTERS. 



produces an inci eased secretion oi lymph and 

 chjle, which, in the process of absorption and 

 contribution to the excremeiititious expulsion 

 is proportionally supph^ed (or the vessels re- 

 plenished) from even the niost distant part of 

 the extremities ; which evidently accounts for 

 the visible advantages arising from a course 

 of physic, when a horse labours under the 

 inconveniences resulting from repletion ; and 

 is said, in the Vulcanian phraseology , to have 

 the HUMOURS fallen into the legs, or fixed 

 upon any particular part of the frame. 



Thus much is introduced to render per- 

 fectly clear, what I term the mechanical pro- 

 cess of purgation ; by strictly attending to 

 which it will evidently appear, that the 

 weaker a catliartic is in its property, the less 

 it will affect the fluids suspended in difitrent 

 parts of the frame ; for \t^ first stiimdus acting 

 upon the nervous system as the inost irritable, 

 the lymphatics and iacteals become only the 

 secondary seat of provocation, and more pro- 

 portionally acted upon as the physic is in- 

 creased in its power of stimulation. 



From this very necessary remark, I mean 



