ioi4 



Journal of Agricultural Research 



Vol. VI. No. zs 



The clutch-position frequency for the occurrence of dwarf eggs is 

 given below. 



Dwarf-egg 

 Fraction of clutch. frequency. 



o. -o. 199 19 



. 200- . 399 40 



. 400- .599 25 



. 600- .799 35 



. 800- . 999 28 



147 

 Mean =0. 5i8±o. 015 



Standard deviation = o. 267 ±0. 01 1 



./ .3 .5 7 -9 



/=>0&/T/OA/ //V CLOrCtf 



Fig. 4. — Diagram showing the number of dwarf eggs which occurred in each fifth of a litter. Dash line 



shows the mean frequency. 



This distribution is shown graphically in figure 4. 



There is no apparent relation of dwarf-egg production to any par- 

 ticular position in the clutch. The dash line in the figure, as in figure 3, 

 represents an ideal uniform frequency for the same number of observa- 

 tions similarly grouped. In this case, as in the case of litter position, 

 the actual frequency was tested against the ideal uniform frequency to 

 determine whether or not the irregular fluctuations were greater than 



