PLATE LIU 



Fig. i. Cross section of a white oak, showing fully developed ty loses (T) in the 

 large vessels (V). 



Fig. 2. Radial-longitudinal view, quarter-sawed surface, of the white oak shown 

 in figure i, showing complete closing of the vessel (V), which makes this wood 

 valuable in light cooperage, etc. 



Fig. 3. Cross section of sapwood of pignut hickory, showing fully developed 

 ty loses (T). 



Fig. 4. Radial view of mesquite, showing "gum" droplets (G) and formations 

 often stimulating tyloses. 



