26 A MILL SCALE STUDY OF WESTERN YELLOW PINE. 



The number of trees forming each diameter class for the immature 

 were as follows : 



20" class 12 trees 



22" class 39 trees 



24" class 67 trees 



26" class '_ 92 trees 



28" class 96 trees 



30" class 65 trees 



32" class 58 trees 



34" class 30 trees 



36" class 28 trees 



38" class 9 trees 



40" class 9 trees 



42" class _ 2 trees 



Total . 507 trees 



For the mature as follows : 



20" class 6 trees 



22" class 9 trees 



24" class 16 trees 



26" class 33 trees 



28" class - 41 trees 



30" class 33 trees 



32" class 53 trees 



34" class 66 trees 



36" class 48 trees 



38" class 44 trees 



40" class 28 trees 



42" class 20 trees 



44" class 11 trees 



*46" class 2 trees 



*48" class 1 tree 



*50" class _ 1 tree 



Total 412 trees 



Therefore all diagrams for immature yellow pine in this publication, 

 showing a relation existing between diameter breasthigh and some other 

 variable, are based upon average points plotted, from left to right, with 

 weights : 12, 39, 67, 92, 96, 65, 58, 30, 28, 9, 9, and 2 trees, respectively. 



In like manner, all diagrams for mature yellow pine are based upon 

 average points plotted from left to right, with weights as follows : 6, 9, 

 16, 33, 41, 33, 53, 66, 48, 44, 28, 20, and 11 trees. 



The following symbols have been used in connection with the diagrams 

 constructed to indicate relations existing between the various determina- 

 tions made. 



*Not used in the final analysis. 



