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



Plate IX. 



F-1.AB. 20 



Fiq. 1.— Red Fir Mechanical Pulp Unsteamed (Run No. 4). 



F-LAB. 21 



Fig. 2.— Western Larch Mechanical Pulp Unsteamed (Run No. 2). 



