LIST OF ILLUSTRATIONS. XI 



FACING 



PLATE PAGE 



IX. Types of Loblolly Pine Wood 50 



A. Type of wood from lower part of stem in old-field stand. 



The coarse grained center indicates large knots. This 

 tree became codominant or intermediate when about 3 

 inches on the radius. The diameter growth was slow 

 on account of the crowding and the stem cleaned of 

 branches. It was isolated by thinning when 3% inches 

 on the radius. The stem at that time resembled that of 

 one of the isolated trees shown on Plate XVI. As a result 

 of this thinning the growth during the past ten years has 

 been at the rate of one inch in diameter every three 

 years. While the wood formed since thinning is coarse 

 grained, it is clear and free from knots. The large 

 amount of hard summerwood is characteristic for flat- 

 woods soils. (Author's illustration.) 



B. Characteristic wood from lower logs of trees in mixed 



stands, medium fine and even grained. The crown of 

 this tree overtopped the hardwoods when it was about 60 

 years old (at 3.3 inches on the radius). Since this 

 period the diameter growth has been at the rate of one 

 inch every four years (7% rings to the inch of radius). 

 This stem is practically free of knots for 60 feet and the 

 wood is of high quality. Nearly the same result can be 

 obtained by the method of cutting which is recommended 

 for the best sites which seeks to develop the codominant 

 and intermediate trees to form the mature stand, and by 

 gradual cutting eventually to develop the best of the sup- 

 pressed trees. (Author's illustration.) 

 X. Types of Loblolly Pine Wood 50 



A. Characteristic wood from middle and upper section of 



rapidly growing tree. The relatively small amount of 

 hard summerwood in this portion of the stem is typical. 

 (Author's illustration.) 



B. Wood from tree growing on very wet soil showing charac- 



teristic irregularity of grain. (Author's illustration.) 

 XI. Fully stocked stand 35 years old, Quality II, in old field on 

 upland of good quality following oak, hickory and short- 

 leaf pine. The density is good; the growth, however, 

 is beginning to decline and the stand would be much bene- 

 fited by a thinning. (Author's illustration.) 56 



XII. Logs of Different Grades 98 



A. Logs chiefly of Grades 3 and 4, diameters 5 to 16 inches. 



These are the prevailing grades and sizes now coming to 

 the mills. Average log about 38 feet, D.-S. (Author's 

 illustration.) 



B. Logs chiefly of Grades 2 and 3, diameters 10 to 24 inches. 



These are the prevailing grades and sizes which were 

 cut by the mills between 1895 and 1910. Average log 



