CONTENTS. XI 



Page 



Daily history of a germinating pea . . . 139 



The chestnut and horse-chestnut . . .140 



The Trunk of Plants . . . ib. 



Structure of the trunk of a tree . . . ib. 



Parts of the wood . . . 141 



Pulp- wood improperly termed sap-wood . . ib. 



Rings of wood . . . ib. 



The pith -tube . . . . ib. 



The centre of the pith or tube in hemlock . ib. 



The straw of grasses t ib. 



The stalk of palms . . . ib. 



Its singular structure and form . . .142 



GROWTH OF TREES HAVING Two SEED-LOBES . . ib. 



Different opinions of philosophical Botanists . . ib. 



Opinions of Malpighi, Grew, and Parent . . . ib. 



Opinions of Hales, Mustel, and Du Hamel . . 143 



Opinions of T. A. Knight and Mirbel . . . 144 

 Opinion of A. Richard .... 145 



Experiments of Kieser, Link, and Dutrochet . . 148 

 Opinions of De La Hire, Darwin, and Du Petit Thouars . 147 



Opinion of Amici . . . . 148 



Summary . . . . . . ib. 



Chestnut of Mount Etna . . . . 149 



Growth in height . . . . . ib. 



Height of forest trees . . . ib. 



American palm, according to Von Martius . . ib. 



Flow of sap checked . . . . . 150 



Fall of the leaf . . . . . ib. 



Not caused by cold . . . ib. 



AGE OF PLANTS ... ib. 



Short life of mould . . . ib. 



Mosses and annual plants , . . .151 



Biennials . . . . . ib. 

 Trees have lived for as much as six thousand years . ib. 



Table of aged trees . . . ib. 



Death of trees . . . ( . . ib. 



THEORY OF THE METAMORPHOSIS OF PLANTS . 153 



Invented by Goethe in 1790 . . . ib. 

 Bearing of the doctrine .... ib. 



Mr. Lindley's theoretical plant . . 155 



Analogies taken for realities > 156 



Loop-hole of the theory . . . . 157 



SYSTEMATIC ARRANGEMENT OF PLANTS 



Classing and naming plants is not science . . 153 



This indispensable as a mere rudiment . . ib. 



Delusions prevalent on this subject . . . ib- 

 Practical mischief caused by systems and their erroneous 



rules . . . . . ib. 



LINNJEAN CLASSIFICATION OP PLANTS, CALLED THE ARTI- 

 FICIAL SYSTEM. 



Tourneforte's system outrivalled by the Linnsean . . 159 



Stamens selected instead of the petals . ib. 



