Ilex Aqnifoliuni , Z., in Reference to Specific Conductivity. 545 
larger than those in the inner rings, but it is also true that in each annual 
ring the vessels in the more basal internodes of a year’s growth are slightly 
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Diagram XIV. Intemodes numbered from base to apex. (Scale, 5 internodes = 1 cm.} 
larger than they are higher up. The last statement is especially true in 
the first annual ring, where the divergence is quite remarkable. This is 
illustrated in Diagram III. It is to be observed in the first annual ring 
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