20 



CONVERSATIONS ON 



on which they slide ; this piece has a ridge on 

 each side of it, and the augers have a groove 

 which exactly fits the ridge. Besides this, 

 each auger ends in a knob, and that knob has 

 teeth all around it. Here is a picture of it." 



Ovipositors, with files, of the Grasshopper, magnified. 



" But, Uncle Philip, what is the piece with 

 the ridge for ?" 



" Ah, boys, that piece shows the wisdom 

 and the goodness of GOD. ' His tender mer- 

 cies are over all his works :' he has placed 

 that piece there to keep the borers stiff, so that 

 they cannot get out of joint, or be broken, 

 when the little workman is boring." 



