HOW TO ATTRACT PERCH. 209 



which it does when it is touched or annoyed. How it makes 

 this noise no one seems to know. At least there are so many 

 conflicting opinions that the matter may be said to be still in 

 doubt. 



The boys fed the larvae on potato-leaves put in a box in which 

 there was placed about six inches of earth. When the larvae 

 had finished their eating, they dived into this earth and turned 

 into the pupae state. In the autumn the perfect moths came 

 out, but only about half of the number reached the final stage. 

 The others died in the pupae state. However, Dick had 

 plenty of specimens for his cabinet and for exchange. 



CHAPTER XXIX. 



How to Attract Perch. Perch-fishing. Pike. Good Sport. Plaster 

 Casts. Model Eggs. 



"I SAY," said Frank, "you remember when the minnows ran 

 at the caddis- worms in their transparent cases, but could not 

 eat them ?" 



" Yes." 



" And you know what shoals of perch there are about the 

 broad, and how difficult it is to drop upon them, because the 

 water is so shallow and clear ? " 



" Yes." 



" Then what would you say to putting a quantity of minnows 

 in glass bottles, and sinking them in the broad, in a good place, 

 for two or three days ? I think a lot of perch would collect 

 together and prowl about trying to get at them, and then we 

 could go and catch any quantity of them, live baiting with 

 minnows." 



This project was agreed to unanimously, and after a day 

 or two, the boys were busily engaged in collecting wide glass 

 bottles, or wide mouthed jars, and in fishing for minnows, of 



