THE ADIRONDACK BLACK SPRUCE. 17 



inch counted and recorded separately. By the latter arrange- 

 ment the amount of eccentricity in the growth is apparent in 

 each case. In the black spruce the heart is seldom found in the 

 exact center of the tree, this lack of concentricity in the rings of 

 annual growth being a noticeable feature. 



The statistics offered first are based on the work done by 

 Forester Humes, in St. Lawrence county, who examined and 

 counted the rings on 237 spruce trees with reference to estab- 

 lishing the facts as to age and maximum size only. The statistics 

 showing number of years for each successive individual inch of 

 diameter, together with amount of eccentricity, are given in 

 other and subsequent tables. 

 3 



