v jii CONTENTS. 



EIGHTH LECTURE. 

 On the Milk-sap of Plants 



NINTH LECTURE. 

 An Essay on the Cactus Tribe 



TENTH LECTURE. 



99 K 



The Geography of Plants 



ELEVENTH LECTURE. 

 The History of the Vegetable World 269 



TWELFTH LECTURE. 



The ^Esthetics of the Vegetable World 



APPENDIX. 



Description of the Plates 



