DWARF EGGS OF DOMESTIC FOWL. 



305 



From the diagram it is seen, as would be expected on the 

 theory of chance, that during the months of heaviest normal 

 egg production more dwarf eggs are produced than at other 

 seasons. Yet it is also seen that the two curves are by no 

 means parallel. The egg production curve rises gradually 

 through the fall and winter to its spring maximum and then 



















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Fig. 52. Diagram showing the percentage of the yearly total egg pro- 

 duction (8 year average, 1899-1907) and total dwarf egg production (8 

 year average, 1908-1916) which occurred during each month. Solid 

 line = percentage of .annual egg production. Dash line == percentage 

 of annual dwarf egg production. 



drops away even more gradually. The dwarf egg production 

 curve does not rise during the fall and winter, but rises very 

 abruptly during the spring to its maximum, which is three 

 months later than the maximum for the normal egg curve. It 

 remains relatively higher than the normal curve through the 

 early summer. 



Since the data for the two polygons are derived from entirely 

 different birds it is desirable to pursue the investigations farther 

 and compare the number of dwarf eggs and the number of 

 normal eggs produced by the same birds. The two years of 

 maximum dwarf egg production 1911-12 and 1914-15 were 

 selected for this study. The data for this study are given in 



