PREFACE 



TO 



THE THIRD LONDON EDITION. 



THE Reader fhould be apprized, that many new pa- 

 ges are interfperfed in this edition, which confift of 

 practical and theoretical obfervations, as the whole arti- 

 cles on Hemicrania idiopathica, retroverfio uteri, aneu- 

 rifma, and the appendix to the fedion on Generation, 

 beginning at No. 8. as well as the diftindion between 

 philofophy and fophiftry in Set XV. i. 5. and the Ra- 

 tiocinatio verbofa, verbal reafoning, in Clafs III. i. 2. 3. 

 and fome others. 



Derby, Jan. 1, 1801. 



r3" IN the former editions of this work the MATERIA 

 MEDICA [which forms Part III.] was placed after the 

 fecond part, or Jthe clafles of difeafes ; but to preferve 

 the more equalfee of the volumes in this odavo edition, 

 the publifher has placed it, with the aflent of the author, 

 after the firft part. 



