Plate III 
Fig. 1. — A face from the double-chipped area, Columbia, Miss., in November, 1917, at the end of a 2- 
year operation: Tree freshly chipped, dry-facing beginning at peak, gum exuding well at shoulder or 
corner. Droplets indicate the position of resin passages. 
Fig. 2. — A face from the narrow-chipped area, Columbia, Miss., in November, 1917, at the end of a 2- 
year operation. Tree freshly chipped. Abundant exudation all along the streak. Each droplet at a 
resin passage, clusters and lines of droplets indicate series of resin passages. Fourteen or more annual 
j rings of sapwood exposed and participating in the yield. 
