21. ABIES CAN ADENSIS, MICHX. 



Hemlock, Hemlock Fir, 



TRANSVERSE SECTION. 



RADIAL SECTION. 



TANGENTIAL SECTION. 



W< ScMerling-Tanne, !fifa Peruche, Sj), Abeto Oanadense, 



PUBUSHKD AMD SBOTIONS MADB BT llOMKTN B. HOOOH, B. A., LCWVUUUB, N. T., U. 8. A. 



