— 189 — 



Form of density: Middle. 



I. Quality 



18.1304 



logYs =3.9071- ^ 



4-1.7471 



J. eVs =8074e 



r=±A0.5% 

 Diif.>r II in number 

 Diff.<r 12 in number 



II. Quality 



logYs =3.7832-^^^ 

 48.8902 



/. e.V, =6270.' 



t 



n! = ±13.0^ 



/ = ± 8.7?^ 



Diff.>r 9 in number 



Diff.<r' 8 in number 



III. Quality 



23.4341 



hg\s =3.6254- ^ 



53.6594 



i. e.Ys =4221e 



m = ±5.2% 



r =±3.5% 

 Diff.>r 2 in number 

 Diff.<p 1 in number 



