— 181 



I. Quality. 



10.6003 



Zo;H= 1.4412- J 



_ 23.2570 

 J.e.H=27.62e 



t 



Age. 



Obs. 



12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 22 

 24 

 25 

 26 

 27 

 28 

 30 

 32 

 33 j 

 35 I 

 37 ! 

 40 

 46 

 48 

 50 



56 ; 

 60 I 

 70 

 75 

 100 



Diflf, 

 Diff. 



4.1 

 4.5 

 4.8 

 5.4 

 6.2 

 6.6 

 7.0 

 8.0 

 8.6 

 9.2 

 10.0 

 10.4 

 10.6 

 II. 1 

 11.4 

 12.0 

 12.7 

 13.2 

 13.5 

 14.0 

 14.8 

 16.0 

 16.5 

 16.6 

 17.8 

 18.5 

 19.5 

 19.7 

 22.1 



CI. 



3.6 

 4.2 

 4.8 

 5.4 

 6.0 

 6.6 

 7.1 

 7.6 

 8.7 

 9.1 

 10.0 

 10.4 

 10.8 

 11.2 

 11.5 

 12.2 

 12.9 

 13.2 

 13.8 

 14.3 

 15.0 

 16.1 

 16.6 

 16.9 

 17.9 

 18.4 

 19.5 

 19.7 

 22.1 



r =±1.\% 



.>r 7 in number 

 <C'' 22 in number 



Diff. 



% 



+ 12.2 

 + 6.7* 



0.0 



0.0 

 4-3.3 



0.0 

 -1.4 

 + 5.0 

 + 1.2 

 + 1.1 



0.0 



0.0 

 -1.9 

 -0.9 

 -0.9 

 -1.7 

 -1.6 



0.0 

 -2.2 

 -2.1 

 -1.4 

 -0.6 

 -0.6 

 -1.8 

 -0.6 

 + 0.5 



0.0 

 -1.0 

 +2.3 



Equation for Average Height 



II. 



%H= 1.4310— 



Quality. 



12.7226 



29.2951 



!.e.H:=26.« 



w = ±3.6^ 



r =±1A% 

 Diflf.>r 8 in number 

 Diflf.<'' 13 in number 



III. Quality. 



12.9639 



to5H= 1.3657 - 



i.e. H = 23.2 le 



t 



Vimm 



i 



m=±4.4% 

 r =±1S)% 



Diflf. >r 4 in number 

 Diflf.<Cr 5 in number 



