MOTHER NATURE'S CRADLES. 167 



Curious and interesting are many of the de- 

 vices which mother nature uses to cradle and 

 shelter her numerous progeny during their im- 

 mature stages. For each device, however, there 

 is a reason. None happens by chance, but all 

 are the product of that evolution which has 

 continued in ever increasing progression since 

 the day that life first dawned upon the face of 

 earth. 



