124- MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



possessed a germ disc. These were normal so far as macro- 

 scopic appearance indicated. The germ disc on the yolk near- 

 est the pointed end of the egg shows very clearly in Fig. 82. 



The two kinds of albumen (of thick and thin consistency) 

 which are normal were present in this egg. There was no 

 trace of a chalaza in connection with any yolk or at either pole 

 of the egg. 



The shell membranes were entirely normal. 



It is shown that, in so far as the four different classes of 

 eggs in respect to the number of contained yolks which are 

 known to occur, the relation of the observed size of the entire 

 egg (measured here by weight) to the number of yolks, is 

 very accurately described by a parabola. 



