INTRODUCTIOX. V 



secret or absurd mode of practice, or deal in 

 patent remedies. 



28. They include the Herhalists, vulgarly 

 called Indian or Hoot Doctors, and the Steam 

 Doctors, who follow the old practice of the na- 

 tives, the Quaclcs or dealers in Nostrums, the 

 Patent Doctors, the Prescrihers of receipts, 

 the Marabouts, &c. 



29. All these classes need instruction on the 

 natural knowledee of medical substances, and 



it ought to be afitbrded to them, that they may 



become properly acquainted with those which 

 they employ or may avail themselves of. 



30. Medical Sciences have lately been widely 

 enlarged, by borrowing the help of all the Na- 

 tural Sciences ; and the enlightened physicians 

 begin to avail themselves of all the materials 

 they can command, rendering all the Sciencea 

 subservient or auxiliaries to their pursuits. 



31. By Botany, the great majority of medi- 

 cal Substances are ascertained and become 

 available : while the study of natural affinities 

 enables to detect and compare botanical and 

 medical Equivalents. 



32. Medical Botany teaching to know and 

 appreciate the greatest number of articles em- 

 ployed in Materia Medica, is become indispen- 

 sable to the enlightened physician. 



33. Vegetable Chemistry analyses vegetable 

 substances, discovers their active principles, re- 

 lative medical value, and ascertains the equi- 

 Talent or incompatible substances. 



34. Even Pharmacy is become a science, by 

 the aid of Botany and Chemistry. Druggists 

 and Pharmacians who sell vegetable Articles or 



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