Bulletin No, ??, Div of Forestry. U. S Dept- of AgticulTure. 



Plate X. 



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Fig. 1.— a thinned Pine Grove in New Hampshire (Trees 51 Years Old 18o i u ihl Acrei. 



Fig. 2.— Yuung Pine in New HAMFbHiHL iTHEEb 20 Years Oldi. 



