[ 48 ] 



Ch, 6. Chara&eres, Rules and • defirritions for 

 eftabiiftiing the charaders of chjfes^ orders ^ and 

 genera, 



Ch. 7. Nomina, Rules for rightly forming ge- 

 nerical names, and thofe of orders and clajfes, 



Ch. 8. Different^, Rules for eftablilhing the 

 fpecific chara6lers of plants. 



Ch. 9. Varietates, Rules for diflinguiftiing va- 

 rieties among plants. 



Ch. 10. Sy7tonyma, Rules relating to the right 

 difpofition of fynonymical names in botanic writ- 

 ings. 



The four chapters laft mentioned make the fub- 

 je£t of the Critica Botanica, in which work 

 every aphorifm is much more largely explained 

 than in the prefent. 



Ch. II. Adumhrationes, Rules for properly de- 

 fcribing and naming the fpecies^ and for giving 

 their complete hiftory in a fcientific manner. 

 ^jgCh'. 12. Vires, Relates to the virtues of plants, 

 as deducible from their agreement in their charac- 

 ters, as of the fame genus^ the fame natural order^ 

 or clafs. The fubjedt of this chapter is treated 

 in a more comprehenfive manner in the Vire^ 

 Plantarum^ printed in the firft volume of Amceni- 

 tates Academics, To give a few inftances how- 

 ever as illuftrations : — The Scammony, Me- 

 choacan^ Turbith, and Sea Bindweed, are all 

 [pedes of the genus Convolvulus^ and all agree in 

 poffeffing a .purgative quality. The Mallow, 

 Marfh-mallow, and Cotton-bufli, are fo many 

 diftind genera^ under a natural order, called 

 columniferouSy and agree in being all mucilaginous. 



Of 



