TADPOLE AND FROG. 



175 



with it when it is removed. The confervoid growth is best 

 kept down by the common water-snail, several of which should 

 be kept in the aquarium. 



You must of course feed the fish occasionally with worms, 

 insects, and bread ; but give them very little at a time, or you 

 will foul the water and render it muddy, and the fish will 

 sicken and die. Keep these few hints in mind, and you will 

 have no trouble in managing your aquarium. 



METAMORPHOSES OF FROG. 



From aquaria to flowers is a sudden transition, but a 

 bunch of violets has just been held to my nose to smell, and 

 their sweet fragrance has borne me in thought from my study, 

 where I am burning the midnight oil, to the green woods and 

 fields of my boyhood, and then a sudden review of events 

 which have happened since in my life, makes me more thankful 

 than ever that that boyhood was, as far as natural history is 

 concerned, a prototype to the boys of whom I am now 

 writing, and makes me wish to urge the more strongly upon you 





