Bui. 606, U. S. Dept of Agriculture. 
Plate VII. 
Penetration in White-Heart Beech— Heartwood (Fagus atropunicea). 
1, piece No. 86 treated 30 minutes; 2, piece No. 87 treated 60 minutes; 3, piece No. 88 treated 120 
minutes. Compare the penetration of white-heart beech with that of red-heart beach, Plate XII. 
