43. BETULA PAPYRACEA, AIT, 

 Canoe Birch, Paper Birch, White Birch. 



TRANSVERSE SECTION. 



RADIAL SECTION. 



TANGENTIAL SECTION. 



Papier-Birke, &*. Bouleau & Canot. S. AbeduL 



Published and Sections made by Roroeyn B. Hough, B. A.. Lowville, N. Y.. U. S. A. 



