EXERCISE. 223 



that I never (particularly after lb much addi- 

 tional pradlice and inveftigation) can conde- 

 fcend to change iny opinion, and admit its 

 uncertainty, in compliment to the unfupported 

 ipfe dixit of any pen whatever; and that I may 

 iland totally exculpated from the charge of 

 publijhmg an opinion fo contrary to the re- 

 fpedable authority of Mr. Clarke, I muft 

 beg to obferve, that my opinion had not only 

 the ^r/cr//)/ of his in publication, but had -been 

 in circulation full tvv^o years before Mr. 

 Clarke's treatife came into my px)ffeirion. 



We come now to the judicious declaration. 

 of BRACKEh^, rcfpcfting the blood that he 

 calls ''vifcid^ psor, 2Siii difpirited \^ to cor- 

 red: which unaccountable profeffional flip, 

 the above quotation w^ill in a certain degree 

 contribute; particularly when I fubm.it it to 

 recollediion, that in many parts of my for- 

 mer volumie (appropriated entirely to medical 

 refearches) I have reprefented vlfcid^ Jizey^ 

 blood, to be the refulting effed: of too much 

 plenitude arifing from alimentary repletion 

 w^ith a want of proper exercile ; while, on 

 the contrary, I have defcribed too great a 

 portion of ferum to conftitute an mpove-., 

 4 ' rijk^d 



