Bui. 552, U. S. Dept. of Agriculture. 
Plate I. 
Fig. 1.— Sections Cut from Casehardened Boards. 
Fig. 2.— Resawed Sections Cut from Casehardened Red Gum Boards Steamed 
for Different Lengths of Time after being Kiln Dried. 
(1) No final steaming; (2) and (3) 18 minutes final steaming; (4). (5), and (6) 36 minutes final steam- 
ing; (7) 3 hours final steaming. 
