326 



FORESTRY INVESTIGATIONS IT. S. DEPARTMENT OF AGRICULTURE. 



Tree-top temperature difference*, wood® and open Jields— Continued . 

 MINIMA. -MEAN. MAXIMA, 



Fig. 66.— Frieclricbsrode. 



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Fig. 67 Eberswal&e. 



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Fig 68.— St. Johann. 





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Fig. 69 — Cailsberg. 



Fig. 70,—Sclioo, 



