20. ABIES NIQR A, 'Pom- 

 Black Spruce, Double Spruce, Bed Spruce, 



TRANSVERSE SECTION. 



RADIAL SECTION. 



TANGENTIAL SECTION. 



Schwartztanne, SH, Epinette noire. o>j>i Abeto negro, 



PUBLISHED AD SKCTIOHS MADB BT ROMBTV B. Hoaon, B. A., LCWVUJUB, N. Y., U. S. 



