43. BETULA PAPYRACEA, AIT. 



Canoe Birch, Paper Birch, White Birch, 



TRANSVERSE SECTION. 





RADIAL SECTION. 



MB 



TANGENTIAL SECTION. 



, Papier-Birke, &v. Bonleau 2, Oanot Sp. AbeduL 



Published and Sections made bv Romevn B. Hou*h. B. A., Lowviile, N. Y., U. S, A. 



