32 FIRST LESSONS IN ZOOLOGY 



celery-worms \vithin three hours. This observer esti- 

 mates that a good-sized toad will destroy nearly ten 

 thousand insects and worms in a single summer. The 

 garden can have no more desirable animal inhabitants than 

 toads; not only should they not be killed but it would be 

 worth while to introduce them in flower and vegetable 

 gardens where they are not naturally present. 



For a good account of tadpole-rearing see " The Life 

 of a Toad," by Professor S. H. Gage. 



