' Forest Service, U. S. Dept. of Agriculture Mechanical Pulp. 



PLATE XIII. 





FIG. 1. HEMLOCK GROUND WOOD. (COMMERCIAL RUN No. 30 ) 



.-^-^/k/-. 



a&m 



. Vx* ^fPH^? 



^Mcw 



'-\W \ / 



FIQ. 2. HEMLOCK GROUND WOOD. (COMMERCIAL RUN No. 50.) USED IN ACCOMPANYING 



PAPER SAMPLE. 



