424 THE LAWS OF ORGANIC 



and variable as the seasons, the conditions of the 

 body, the severity and number of the deranged 

 symptoms, and many other modifying circum- 

 stances which had not been duly considered. 



DXVII. We are too frequently misled by what 

 may be called theoutline of diseases, and too little re- 

 gulated by what may be considered the subordinate 

 features or symptoms of general or local disorders. 

 He that, at one time, cures by wholesale, will, at 

 another, destroy in the same proportion. His 

 knowledge is the only fixed and unvarying ob- 

 ject: every thing around him is continually 

 changing ; and it is therefore obvious that the 

 application of his principles will be efficient or in- 

 jurious according to the conditions of the system. 



DXVIII. The subject of this chapter will be a 

 further illustration of sanguineous sympathy ; and 

 I am not aware that any other class of medicines 

 so directly proves the justness of the division of 

 sympathies I have introduced as the one under 

 consideration. By the exhibition of emetics the 

 constitution is roused or depressed to an extreme, 

 and the most characteristic phenomena attending 

 these different states belong to the sanguiferous 

 system. 



DXIX. The action of emetics on the animal 

 economy might have been deduced from the ge- 

 neral principles developed in different parts of 

 this work ; but I have, on the present occasion, 

 endeavoured to demonstrate, by direct experi- 



