148 



Clyde E. Leighty 



For average yield of culm per plant and average weight of straw per 

 culm of plant (Figs. 99, 78, 101, 117), the coefficient for series 1219 is 

 .933 ± .005. This is greater than that for series 1221 by .077 ± .011. 

 The coefficient for series 1257 is .925 ± .006. This is greater than that 

 for series 1259 by .138 ± .016. The first of these differences is seven 

 times its probable error; the second is a little less than nine times its 

 probable error. 



Series 1259 



















-H 



l-H 



■-H 



■-I 



i-H 



i-i 



■-I 



rH 



<N 



7 





N 



■^ 



■^ 



lO 



i 



i> 



cc 



C5 



O 



- 



cq 



CO 



■* 



lO 



2 



O 

 CSI 



CO 



(M 



0- 1 







1 































1- 2 



1 









1 



























2- 3 



2 



1 



2 



1 



1 



























3- 4 







5 



1 



3 







1 





















4- 5 







4 



8 





1 







1 



















5- 6 









3 



8 



5 



2 





2 



















6- 7 









5 



7 



6 



2 



2 





1 

















7- 8 









1 



6 



13 



9 



1 





1 



2 















8- 9 











2 



8 



ri 



8 



1 



3 

















9-10 













2 



12 



10 



6 



2 



2 





1 







1 





10-11 











1 



2 



1 



8 



6 



8 



2 















11-12 















1 



4 



6 



10 



8 



2 











1 



12-13 















1 



2 



4 



5 



11 



6 



2 











13-14 

















1 



1 



3 



6 



2 



1 



1 









14-15 





















1 



5 



3 













15-16 























1 



1 



2 











16-17 



























1 





1 







Totals 



1 12 19 29 37 39 37 27 34 37 14 



Totais 



1 



2 



7 



10 



14 



20 



23 



33 



33 



36 



28 



32 



31 



15 



9 



4 



2 



300 



Fig. 117.* — Correlation between average yield of culm per plant, in decigrams, 

 subject; and average weight of straw per culm of plant, in decigrams, relative 



r=. 787 ±.015 



* See footnote to Fig. 73, page 93. 



