NATURAL SIZE 



ft.t«w. / "tlUET^ip' C -ViMcri tr 



^*"«'* ^>^. 



Cross section of Black Spruce, 115 years old, 12 inches in diametei 

 on the stump From an impression made with carbon paper 

 The gi eater thickness of the outer rings is due to mteriuca- 

 tion made by lumbermen eighteen years ago 



THE LIpE HISTORY OF A TREE 



Albany Eng Co 



