ARIZONA EXPERIMENTS ON WESTERN YELLOW PINE. 



Of the 388 yellow pines tapped, 89 had some defect, such as a 

 fire-scarred butt, dead top, or large number of dead limbs. Of the 

 395 black jacks, only 15 were defective. The greatest proportion of 

 defective trees was in area A among the large yellow pines. 



TABLE 1. Number and size of tapped trees in the Arizona experiments; areas A, B, and C. 



i One of these 45 inches in diameter. 

 Tapped trees on areas A, B, and C: Black jack, 395; yellow pine, 388; total, 783. 



WEATHER CONDITIONS. 



Table 2 shows the weather conditions throughout the Arizona 

 experiments : 



TABLE 2. Meteorological record, Fort Valley (Ariz.) experiment station, 1911. 



