viii PREFACE. 



trull to. He perceived in thefe 

 works that all was not to be credit- 

 ed, and therefore be almoft rejeded. 

 all ; not recolleding that truth was 

 probably fomewhere between the 

 two extremes. 



It is fortunate that the number of 

 poifonous herbs is very fmall. Even 

 of thefe the dreadful effeds may be 

 prevented, by an immediate and pro- 

 per attention, or removed, though 

 they have partly taken place. They 

 appear to aft by an imprefiion upon 

 the nervous fyftem, rather than by 

 an inflammation of the ftomach and 

 duodenum, as mineral poifons do, 

 which from this beginning produce 

 thofe other intervening fymptoms, 

 that ufually end in death. In vain 

 would their offending fubftances be 

 removed from the ftomach by eme- 

 tics, 



