NOTES ON THE BISHOP PINE 889 



following figures, compiled from the scale books by A. H. Muzzall, 

 who was then scaling in this camp, are of interest in showing the size 

 of the bishop pines and their comparative importance in the stand. 



Total volume for the area (all species) 4,234,162 board feet 



Volume of bishop pine on same area 131,741 board feet = 3% in vol. 



Total number of trees cut and scaled 1,373 



Number of bishop pine trees 71 = 5% 



The average volume of above 71 thees = 1,980 board feet (Spaulding scale) 



Range in volume from 1,000 to 4,000 board feet. Using 46 of these 

 trees as a basis, the average merchantable length was 80 feet. Only- 

 four had a merchantable length as low as 40 feet, and twelve exceeded 

 100 feet, the maximum being 116 feet. 



The stump diameters of the above trees (inside bark) ranged from 

 21 to 56 inches, the average for the forty-six being 37 inches. 



Counts of annual rings were made on the stumps of eight of the 

 above trees which showed the following age diameter relations : 



Stump diameter 



inside bark Age when cut 



I tic lies Years 



2o.5 190 



25.9 • 260 



27.4 190 



30.0 150 



40.0 250 



44.0 . 260 



48. 250 



58. 270 



The progress of diameter growth may be approximated from these 

 analyses about as follows: 



Age Diameter 



Years Inches 



20 " 6.7 



40 13.4 



60 15.1 



80' 19.8 



100 23.8 



120 ^ 28.6 



140 ' 30.9 



160 32.8 



180 38.0 



200 39.1 



