CONTENTS. 



BOOK I. 



Pub 



Op the Pelncipai. CmcmiSTANOEs connected wtth Veobtabli! 



liBE WHICH ILLnSTEATE THE OpEKATlOSS OK GaKDENINQ . . 5 



CHAPTER I. 



GERMINATION. 



The Nature of a Seed. — lU Dmation. — Power of Growth. — 

 Causes of Germination. — ^Temperature. — Light. — Humidity. 

 — Chemical Changes 1 



CHAPTER II. 



GROWTH BY THE ROOT. 



Roots lengthen at their Points only. — Absorb at that Part 

 chiefly. — Increase in Diameter like Stems. — Tlieiv Origin. — 

 Are feeding Organs. — Without much Power of selecting thuir 

 Food. — Nature of the latter. — May be poisoned. — Are con- 

 stantly in Action. — Sometimes poison the Soil in which they 

 grow. — ^Have no buds. — ^But may generate them . . . 10 



CHAPTER III. 



GROWTH BY THE STEM. 



Origin of the Stem. — ^The Growing Point. — Production of 

 Wood, Bark, Pith, Medullary Rays. — Properties of Sap-wood, 

 Hearfwood, Liber, Rind, &c. — Nature and Office of Leaf- 

 buds -Embryo-buds. — ^Bulbs. — Conveyance of Sap, and its 

 Nat se 22 



