﻿Bui. 1136, U. S. Dept. of Agriculture. 



Plate IX. 



Cross Section of a Southern Swamp Oak Tree Cut Into Bol- 

 ster Stock and Dried. 



The black rectangles represent the green size and exact location of the pieces in the 

 tree. The dried pieces exhibit in exaggerated form many of the common drying 

 defects, such as checks, honeycomb; diamonding, and even cupping. The differ- 

 ence between radial and tangential shrinkage and the comparatively small 

 shrinkage of some of the sapwood are illustrated. 





