50 



H. H. Love and C. E. Leighty 



four years, varies from —. 172 ± .033 for 1910 to .300 ±.021 for 

 1908. These correlations fluctuate strongly from year to year, 

 and are never very high, although in some years the coefficients 

 are large enough to be of considerable importance, especially when 

 the coefficient is several times its probable error. From this it 

 must be concluded that the relation of average weight of kernels 

 to average and total number of kernels is responsive to environment, 

 and varies independently much of the time. The kernels may increase 

 in size or the number may increase without a corresponding change taking 

 place in the other character. 



3.5- 4.5 

 4.5- 5.5 

 5.5- 6.5 

 6.5- 7 

 7.5- 8 

 8.5- 9 

 9.5-10 

 10.5-11 

 11.5-12 

 12.5-13 

 13.5-14.5 

 14.5-15.5 

 15.5-16 

 16.5-17 

 17.5-18 

 18.5-19 

 19.5-20 

 20.5-21 

 21.5-22.5 

 22.5-23.5 

 23.5-24.5 

 24.5-25.5 

 25.5-26.5 

 26.5-27.5 

 27.5-28.5 

 28.5-29.5 

 29.5-30.5 



2 

















2 

















1 









1 









1 



1 















2 

















4 











1 









4 



1 





1 



1 







7 



1 



1 













11 



5 















11 



24 



3 













24 



36 



26 



4 



3 









9 



55 



42 



16 



5 







1 



9 



50 



57 



32 



7 



2 



4 



1 



8 



39 



44 



30 



8 



5 



2 



1 1 1 



4 



24 



37 



25 



8 



3 





3 2 1 i 



6 



15 



15 



16 



4 



2 



1 







4 



5 



4 



4 



3 









5 



3 





3 



1 









1 



4 



4 



1 











1 





1 



1 











1 

















1 

















1 















2 



2 







. 2 



2 



2 



5 



7 



9 



16 



38 



93 



128 



162 



138 



107 



59 



21 



13 



11 



4 



1 



1 



1 











1 



106 268 238 132 46 18 7 5 3 2 825 



Fig. 51. — • Average weight of kernels per culm in milligrams, subject 

 Total number of kernels per culm, relative. 1908 

 Coefficient of correlation = .300 ± .021 



