Bui. 909, U. S. Dept. of Agriculture 
Fig. I. — Walnut Half Logs, Which Have Been Prepared for Rotary 
Stay-Log Slicing by Trimming Off the Greater Part of the Sap- 
wood. 
At the butt end they are entirely heartwood. 
Fig. 2. — A Walnut Half Log Being Sliced From the Sapwood Side by 
the Rotary Stay-Log Process. 
