TABLE OF CONTENTS. 
CHAPTER I. 
PAGE 
On the Natural Conditions of Plants . . . * „ . 1 
CHAPTER II. 
On the Causes which interfere with the Natural Conditions 
of Plants in large Towns . . .. . . ,19 
CHAPTER III. 
On the Imitation of the Natural Conditions of Plants in closely- 
glazed Cases . , . . . . .33 
CHAPTER IV. 
On the Conveyance of Plants and Seeds on Ship-hoard . . 69 
CHAPTER V. 
On the Application of the Closed Plan in improving the Condi- 
tion of the Poor , . . . . .85 
CHAPTER VI. 
On the probable future Application of the preceding Facts . 101 
Appendix . 
. 117 
