CONTENTS. 



Introduction, ix 



CHAPTER I. 

 The building-up of the Tree-form out of its unit; or, the Life of the 

 Tree traced throughout its vegetative period from infancy to puberty, 13 



CHAPTER II. 



The History of the development of Trees may be advantageously 

 studied by a careful examination of the marks left by Nature on 

 their young branches — The growths made by the Tree during the 

 former years of its life, having been there accurately recorded, . 26 



CHAPTER III. 



The inner organization of Trees ; or a description of the Anatomy and 

 Physiology of the different species of Cells which enter into the 

 composition of their tissues, 37 



CHAPTER IV. 



The Tree is constructed on the principle of a cone — Its leaves are the 

 sources whence proceed the formative material used in the building- 

 up of its Stem and Branches, which is distributed amongst them 

 after a common law, 57 



CHAPTER V. 



Those natural Causes which produce the inequality in the Develop- 

 ment of the Branches and Buds of a Tree, illustrate clearly the laws 

 of social inequality and subordination in civilized communities, . 67 



CHAPTER VI. 



The rhythms or oscillations of Growth in the Development of Trees 

 are durably impressed on their Organism, and the Organization of 

 Man is equally as susceptible of receiving and retaining impression? 

 from without, 91 



