Sept. iS, 1916 



Dwarf Eggs 



1005 



gradually through the fall and winter to its spring maximum and then 

 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 further and compare the 



SMMunrn 



Fig. 2. — Diagram showing for the years 1911-12 and 1914-15 combined the percentage of the yearly total 

 egg production and dwarf-egg production which occurred during each month and 100 times the percentage 

 of the eggs produced each month which were dwarf. Solid line= percentage of total yearly egg production 

 per month. Dash line= percentage of total yearly dwarf-egg production per month. Dot-dash line= 

 the percentage ( X 100) of dwarf eggs produced during the month. 



number of dwarf eggs and the number of normal eggs produced by the 

 same birds. The two years of maximum dwarf-egg production, 191 1-12 

 and 1914-15, were selected for this study. The data for this study are 

 given in Table XXII, which shows the total egg production, the dwarf-egg 

 production, and the number of dwarf eggs per 10,000 eggs for each month 

 of the two years. The last five columns of the table give the data for the 

 two years combined. The summary data given in the last three columns 

 are shown graphically in figure 2. 



