June 19, 1916 Correlated Characters in Maize Breeding 453 



Pearson, Karl, 



1909. On a new method of determinmg correlation between a measured character A , 

 and a character B, of which only the percentage of cases wherein B exceeds 

 (or falls short of) a given intensity is recorded for each grade of A. In 

 Biometrika, v. 7, pt. 1/2, p. 96-105. 

 SoPER, H. E. 



1914. On the probable error of the bi-serial expression for the correlation coefficient. 

 In Biometrika, v, 10, pt. 2/3, p. 384-390. 

 Webber, H. J. 



1906. Correlation of characters in plant breeding. In Amer. Breeders' Assoc. Rpt., 

 V. 2, p. 73-83, pi. I. 



