-na 



STATURE STUDY IK SCHOOLS* 



HOW YOUXG BIRDS BREAK THE EGG SHELL. 



BY 



C J. Mayzvarix 



Although almost every one who reads these Tines is familiar with young- 

 chickens and the young of other species of birds, few know just how these 

 little birds get put of the egg. Of course we all know that the egg is brok- 

 en open in some way, but just the method by which this is accomplished. 

 is not clear to many. 



Fig. 117. 



HeAd of free Duck, 



Looking back into the early geological times, we find sufficient evidence 

 lo lead us to believe that the first birds were derived from the reptiles, and 

 that one way in which they show their reptilian affinity is by the possession 

 «f true teeth. These teeth, however, were lost quite early in the process of 



