RED ALDER OF THE PACIFIC NORTHWEST 
A- Transverse Section 
Sections Magnified 
38/£ diameters 
B - Radial Section 
Tangential Section 
Fig. 2.— HIGHLY MAGNIFIED SECTIONS OF RED ALDER SHOWING 
STRUCTURE 
The numbers on the photographs refer to the following: (1) Width of annual ring; 
(2) medullary or pith ray; (3) wood fiber ; (4) vessel; (5) wood parenchyma 
