Bul. 343, U. S. Dept. of Agriculture. PLATE XII. 
F—LAB, 26 
Fic. 1.—BALSAM FIR MECHANICAL PULP UNSTEAMED (RUN No. 14). 
F—LAB. 27 
Fic. 2.—NOBLE FIR MECHANICAL PULP UNSTEAMED (RUN No. 2). 
