56 



IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 

 TABLE I (Cont.) 



Fork 

 (B) 



158 



127 



159 



160 

 161 



162 



19.5 



30.0 



10 



10 



10 



10 



10 



10 



10 



10 



14 



20 



30 



25 



30 



25 



25 



15 



20 



30 



30 



30 



10 

 10 

 10' 

 10 

 20 

 25 

 10 

 10 

 10 

 20 

 20 

 20 







1 

 10 

 15 

 15 

 10 



D 

 F 

 D 

 F 

 D 

 F 

 D 

 F 

 D 

 F 

 D 

 D 

 F 

 D 

 F 

 D 

 F 

 F 

 D 

 D 

 F 

 F 



F 

 F 

 D 

 D 

 F 

 F 

 F 

 D 

 D 

 D 

 F 

 D 

 F 

 D 

 D 

 F 



4.2 

 6.2 

 4.2 

 4.0 

 5.0 

 5.2 

 3.6 

 3.4 

 5.4 

 5.4 

 4.6 

 4.2 

 4.2 



8.6 



13.4 

 24.0 

 23.0 

 27.4 

 23.0 

 23 . 

 21.5 

 23.0 

 23.0 



8.4 

 12.0 

 17.2 

 15.0 

 17.0 

 15.6 

 16.0 



9.6 

 12.6 

 10.8 



8.5 



2.4 

 2.2 

 2.8 



5.4 



6.8 

 4.8 

 4.9 

 5.0 

 9.8 

 9.6 

 9.8 



7.4 

 5.5 

 8.2 



7.8 



.0 



0.12 

 0.806 

 .952 

 1.000 

 1.80 

 1.73 

 2.77 

 2.94 

 2.77 

 2.77 

 3.47 

 4.04 

 4.04 



2.26 

 2.25 

 0.416 

 .434 

 .365 

 .434 

 .434 

 .465 

 .434 

 .434 

 1.66 

 1.66 

 1.73 

 1.66 

 1.76 

 1.60 

 1.56 

 1.56 

 1.59 

 2.77 

 3.53 

 3.40 



4.16 

 4.54 

 3.57 

 3.03 

 3.70 

 3.67 

 2.08 

 2.04 

 2.00 

 2.04 

 2.08 

 2.04 

 0.000 

 .135 

 1.81 

 1.82 

 1.91 

 3.33 



f(av.) 



(— )0.12 



0.92 



1.76 



2.81 



3.85 



(— )2.25 



( — )0.427 



1.64 



3.23 



Uncertain 

 (— )4.35 



( — )3.50 



( — )2.05 



COl 



1.85 



f+nB 



N 



1 . 0000 



1.0000 



0.9987 



.9993 



.9993 



2.0O16 



2.0000 



2.00^0 



1.9968 



2.0031 



2.0000 



2.O006 



1.9987 



