Plate 1 



Fig. 1. — The old method of cutting a box or cavity in the butt of the tree. Disadvantages: The tree was 



weakened; it became a fire hazard; the box was difficult to empty; and wasteful as a receptacle for 



receiving gum from a high face. 

 Fig. 2. — Stand which includes the trees selected from the narrow, double, and standard chipped tracts 



at Columbia, Miss., for detailed microscopic study throughout the respective seasons of 1916 and 1917. 



Note the presence of some suppressed trees. 

 Fig. 3. — The American practice of placing an "advance streak" some weeks before regular chipping 



begins. (This picture was obtained through the courtesy of Mr. F. Canning of the Forest Service of 



India.) 

 Fig. 4. — Appearance of a tree at the end of a standard 2-year commercial operation, at Columbia, Miss. 

 Fig. 5. — Small or modified American face used experimentally on small timber on the Florida National 



Forest after 3 years' turpentining. 

 Fig. 6. — French method of turpentining as practiced experimentally on small timber on the Florida 



National Forest after 3 years' turpentining. Note shape of face, chipping tool, and area freshened. 



