8 



STRUCTURE OF VESSELS. 



plank, till used, or be planked, and the plank kept 

 dry under cover. One summer on the ground will 

 generally render a beech log in the bark useless. 



DIRECTIONS* FOR TRAINING PLANK TIMBER. 



Divide all branches into leaders and feeders ; lead- 

 ers, the main or superior shoots which tend to become 

 stems, A, a, ; feeders, the inferior branches, B, 6,5,5, 



* These directions are generally applicable— as well for what 

 may be required for being bent for compass-timbers, and for what 

 may be used for laud purposes, as for plank. 



