FKOG CULTUEE 227 



value, excepting to sportsmen for use as bait 

 for fishing, the hatching-pond should be sur- 

 rounded by a fence, because there will be no 

 need to transfer the young after their meta- 

 morphosis to other and larger ponds. 



As frogs almost invariably, when in tHe 

 water, keep near the shore, it would probably 

 be economy to make the ponds very narrow, not 

 more than 20 or 30 feet wide. They might be 

 in the nature of ditches, winding and twisting 

 over the property. 



The entire period, from the time the eggs of 

 the leopard frogs are fertilised until the frogs 

 are ready to be sold to the sporting-goods men, 

 is only between three and four months. Hence, 

 if this species is propagated for that purpose, 

 and success is achieved, the returns are quick, 

 and the season soon over. 



Ponds for hatching green frogs and bullfrogs 

 should be almost, if not quite, as large as those 

 intended for the holding of the yearling and 

 two-year-olds, and they should be just as deep. 

 Pennsylvania found that ponds 275 feet long 

 and 60 feet wide developed thousands of the 

 tadpoles of the common green frog under fa- 



