no MAINE AGRICULTURAL EXPERIMENT STATION. I914. 



2. Among the birds which began to lay in the fall there is 

 no relation between the number of eggs laid and the time of 

 hatching or the exact date of the first egg. 



3. Among the whole flock there is no relation between the 

 mean size of the egg and either the time of hatching or the 

 time of laying the first egg. 



4. Correlations calculated between body weight and number 

 of eggs and size of eggs, and between number of eggs and size 

 of eggs were all significantly zero. 



Autopsy data were taken on the thirteen birds which com- 

 pleted their second year. The number of birds is too small for 

 statistical analysis. They show an apparent relationship be- 

 tween the size of the inactive oviduct and the time which has 

 elapsed since the last egg and the amount of yolk present in the 

 ovary. The size of the active oviduct appears to be related to 

 the body size. It is not possible to determine whether or not 

 there is a relationship between the size of the active oviduct and 

 the size of the egg. 



The Interrelation of the Dimensions, the Shape, Size op 

 Egg and the Size and Proportion oe the Parts. 



The individuality of the birds in respect both to the mean 

 size and to the amount of variation of each egg character was 

 discussed in preceding paragraphs. In this discussion it was 

 noted that there was a general relationship between the various 

 characters, that is when an individual laid large eggs her char- 

 acterisitc egg was both long and broad and each one of the 

 component parts was relatively large. It was also noted that 

 the eggs of an individual evidently varied coincidently in both 

 diametral dimensions since they were less variable in either 

 dimension than in size. It was further noted that within an 

 individual there w^as a compensatory variation in the size of 

 the parts since the variation in the whole egg is less than the 

 variation in the parts. 



The purpose of the present part of the paper is to show the 

 interrelation or more strictly correlation of the various egg 

 characters within the eggs of each of the several individuals. 



The results of an analysis of the data may be summarized as 

 follows : 



