986 



Journal of Agricultural Research 



Vol. VI, No. 25 



and small-yolked dwarf eggs, between small-yolked and f ree-yolked dwarf 

 eggs, and between f ree-yolked and yolkless dwarf eggs. 



Table V. — Deviation between normal eggs and egg-shaped dwarf eggs and between the 

 different classes of egg-shaped divarf eggs for the mean and coefficient of variation of each 

 measured character 



a Calculated from the 450 eggs laid by the flock on a single day. 



* Calculated from all of the 3,iSo eggs laid by a flock ot 22 pullets during their first laying year, 

 c Calculated direct from the data for the 16 small-yolked dwarf eggs for which the weights of the parts 

 were known. 



It is customary to consider a difference smaller than twice the probable 

 error as probably not significant, a difference between two and three 

 times its probable error as of a doubtful significance, and a difference 

 three or more times the error as certainly or almost certainly significant. 



