SIZE, SHAPE AND PHYSICAL CONSTITUTION OF THE EGG. Ill 



1. Different pairs of egg characters show a decided differ- 

 ence in the degree of correlation. 



2. There is a general tendency for a given pair of charac- 

 ters to be similarily related in the eggs of the several individ- 

 uals. 



3. Individuals, however, show significantly different degrees 

 of correlation in any pair of characters. The range of the 

 individual variation is wider and the number of individuals 

 which differ significantly from each other is larger for some 

 pairs of characters than for others. 



4. Length and breadth are positively but not highly cor- 

 related. 



5. Both length and breadth are highly positively correlated 

 with weight. 



6. Breadth-weight correlation is as a rule higher than length- 

 weight correlation but an individual may show the reverse 

 relation. 



7. Index and weight correlation when significant is negative 

 and low. 



8. The relation between length and breadth, length and 

 weight, and index and weight is much closer within the eggs 

 of an individual than within the eggs of the strain, but breadth 

 and weight are as closely related within the eggs of the strain 

 as within the eggs of an individual. 



9. In eggs of the same weight the two dimensions are nega- 

 tively correlated but the degree of correlation varies greatly 

 in the different individuals. 



10. Either dimension is highly correlated with weight when 

 the other dimension is constant. The correlation between 

 breadth and weight is higher than the correlation between 

 length and weight. The individual variations are less than in 

 the gross correlations or in the correlations between length and 

 breadth in eggs of the same weight. 



11. The weight of each of the three parts of the egg (albu- 

 men, yolk and shell) is positively correlated with egg weight. 

 The heaviest part, albumen, is invariably very closely correlated. 

 Yolk is also closely correlated but there is a greater individual 

 variation in the value of the coefficients. Shell, the lightest part, 

 is much less closely correlated and the individual differences 

 are much greater than in the case of the two heavier parts. 



