10 DROPS OF WATER. 



amusement (and it is a never-ending one) a 

 short time occasionally is well bestowed on one 

 of the most beautiful parts of the creation. 



There are upwards of seven hundred species 

 of Infusoria known and described. These are of 

 all shapes and forms, some even assuming a va- 

 riety in themselves ; many possess eyes, others have 

 none ; some move so rapidly that the eye cannot 

 follow them, and others are attached to various 

 substances ; some have very many stomachs, or 

 internal sacs, and others have only one ; others, 

 again, form a compound mass, that is, many in- 

 dividuals live in the same transparent case, and 

 some are so minute that by the aid of the best mi- 

 croscopes they cannot be clearly discerned. But 

 enough has been said to excite the mind, and in- 



