— 183 — 



Form of density: Middle. 



I. Quality. 



^,,,„ 9.3150 

 %N= 2.7639 + ^ 



21.4487 



i.e. N = 580.6e 



Age. 1 Obs. i Cal. 



12 



13 



14 



15 



16 



17 



18 



19 



20 



22 



24 



25 



28 



30 



32 



33 



40 



46 j 



48 [ 



50 ; 



I 



56 

 70 

 100 



Diff, 

 Diff. 



Diflf. 



3750 I 3468 

 2955 I 3023 



2687 

 2426 

 2219 

 2050 

 1912 

 1796 

 1697 

 1539 

 1419 



+ 9.5 

 + 2.3 

 + 7.6 

 + 1.3 

 -14.2 



- 8.0 



- 1.3 

 -13.0 



- 1.3 

 + 1.8 



- 6.2 



1370 - 5.4 



1249 

 1187 

 1128 

 1113 

 992 



2918 

 2458 

 1943 

 1898 

 1887 

 1590 

 1676 

 1568 

 1336 

 1300 

 1291 

 1158 

 1184 

 1124 

 1013 

 1075 



886 



911 



851 



776 



706 



m=±6A% 

 r =±4.3% 



>r 9 in number 

 <r 14 in number 



+ 3.3 



- 2.5 



+ 4.7 



+ 1.0 



+ 2.1 



926 +13.8 



907 



i 

 892 



852 



776 



2.4 

 2.1 

 0.1 

 0.0 



720 i - 2.0 



II. Quality. 



11.1366 



%N =2.853 



j.e. N = 713.1e 



25.6831 



t 



Age. 



Obs. Cal. 



Diff. 

 % 



16 3174 



17 3220 

 20 2620 

 22 2248 



24 2075 



25 2113 



26 1930 



27 1836 



28 1799 



29 1693 



30 j 1739 

 32 1683 



34 1428 



35 1457 



55 1090 



60 1065 



65 1100 



m = ±43% 

 r = ±2.8% 



Diff.>r 7 in number 

 Diflf. <c 10 in number 



2541 



3222 



2569 



2289 



2075 



1989 



1912 



1844 



1781 



1738 



1676 



1589 



1516 



1484 



1137 



1093 



1058 



-11.6 



- 0.6 

 + 2.0 



- 1.8 

 0.0 



+ 5.9 

 + 0.9 



- 0.4 

 + 1.0 



- 2.7 

 + 3.6 

 + 5.6 



- 6.2 



- 1.9 



- 4.3 



- 2.6 

 + 3.8 



III. Quality. 



15 9179 

 ?N=2.7961+ ^ 



36.6526 



+ 7 



i.e. N=625.3e 



m=±3.66% 

 r =±2.40% 



Diflf. >r 2 in number 

 Diflf.<7" 1 in number 



