95. BETULA NIGRA, L 



River Birch, Red Birch, 



TRANSVERSE SECTION. 



RADIAL SECTION. 



TANGENTIAL SECTION. 



Schwarz-Birke. &*. Bouleau noire. Sp. Abedul negro. 



PuMlrted and StcMau made by Homy* B. Hough, B. ., Lowvllle, N. Y., U. S. 



