Bui. 343, U. S. Dept. of Agriculture. 



Plate X. 



F-LAB. 22 



Fiq. 1.— Western Hemlock Mechanical Pulp Unsteamed (Run No. 1). 



Fig. 2.— Lodgepole Pine (California) Mechanical Pulp Unsteamed iRun 



No. 2). 



