THE FOREST NURSERY 



A 



271 



1 ' I 



-1-7-.6 in T 



FIG. 54. Types of marking boards. 



A. Marking board with V-shaped battens. 



B. Marking board with U-shaped battens. 



C. Marking board with W-shaped battens. 



D. Board for marking broad drills. 



a, b, c, d. Form of drills. 



