1 HE <ma or UKOOQ knowledge from what plant this 

 or tliat particular medicine i* taken, is not one of the 

 kali tame* of the prefent imperfection of the Hittoryof 

 Phylic; and not with (landing the cxtcnfivcncfs of com- 

 merce in theft latter time*, ami the op port unities thereby 

 ■Horded to the cultivators of Natural Itlilory of cx- 

 ■; ptoduAna* of vtrfam anuria in their 

 native (oil, and even in regions from whence Iclf-intcreit 

 hail before excluded them, we arc Dill ignorant from 

 whence feveral medicines arc prepared, which we every 

 day \ifc in tlio proilico of Phytic. To thii ignorance 

 mufl likewife he attributed tliat uncertainty which pre- 

 vails in the operations of [(articular medicines, and the 

 dilHTciit opinions which have prevailed relative to their 

 effects on the human body ; and this relates not only to 

 filch vegetables as arc brought from dtftant regions, 

 hut even to thofc which are natives of our own coun- 

 try, llimi (he hotter climates we receive feveral medt- 

 ... though coming from different places, arc 

 called by the lame title ; and many European plants arc 

 in one plate commended for their lingular efficacy, 

 A while 



