[ 5 1 

 the claft or family to which they ought to be referred, and 

 with tefpea to feme wc arc entirely ignorant Mud. light, 

 however, has of late year* been thrown on ilu.^ lubjeft, 

 ami we have harm to a certainty the plains (TOO) which 

 various medicine* arc procured ; having infallible marks 

 or cliaractcrs by which ii> dittinguilh their affinities ; OUT 

 expericnoDthenfixewiUnot belofttopofte i 

 theancknU hat been to at, bed w ill remain a* long as the 

 plants thcmfelvcs. Noone willdeny that the knowledge 

 ofptanw,grounik»io»iiivir eflentia] part*, which areeon- 



Itnni and obvious, is the luretl method of pKferving the 



i mefrquaUtks, when coco dHowwed, from 

 parUblng, as well as of determining any doubts or dif- 

 putej relative to that point. The fight b imquertionably 

 Id's liable to uncertainty than rbc I'mell and tattc, which 

 are capable of being perverted 



fuch a manner as to give uncertain inanitions : and how 

 many plant* arc there, which, though fimilar in fmcH 

 and tattc, are yet very different In their effects ! To tab 

 may be added the BnpofflbUhy of explain! 

 thefe fenfatiom to others : it is furely far caller to inform 

 people through the medium of light. It may Hill l>c 

 objected, perhaps that colour, a particular afforded by 

 our fight, is Hill an urn - ■ A - ** known to 



vaiy. " Had we no other character* but the I 

 by which we might communicate to pofletity the 



1 1 theft remedta from which we have re- 

 ceived to much advantage, they would become both 

 uncertain, ami in a little time as unprofitable to them 



