PREFACE. Xlll 



observe it is formed of two half-circular green 

 masses, joined together on the straight side by 

 a narrow band-like tube : you see it has neither 

 root, branch, nor leaf, and yet it is a vegetable. 



Now we will turn from the inanimate, to ani- 

 mated beings. That wonderful living creature 

 you see approaching, is worthy of special exami- 

 nation. You exclaim, " This is not a living 

 creature, but a miniature globe, rolling in this 

 new world into which you have introduced us/ 5 

 It has this appearance, certainly ; but that it has 

 sense, motion, and will, I think I can convince 

 you, and moreover that it is not one being alone, 

 but is formed of hundreds of minute beings, all 



