PREFACE. XV 



enjoyment they all seem to have ; their united 

 efforts also, continuously exerted, turn the globe 

 round, and thus the whole progresses rapidly. 

 Look within the globe, and you cannot fail to 

 observe, towards the centre, other smaller globes, 

 formed exactly like the larger one, being already 

 full of little individuals ready to enter on active 

 life. Now you perceive the transparent case is 

 ruptured in one spot, and you fear the globe has 

 met with an accident, and will perish. On the 

 contrary, it is the prelude to new life. The 

 orifice becomes larger; the minute globes con- 

 tained within are making towards the opening : 

 now one has escaped, and now another ; those 



