AIR TEMPERATURES IN FORESTS AND OPEN FIELDS. 59 



Forest air tcmjurulitrc diffaencin (i/wvoils and open ftehh (W—O). 



Fig. 18. — liccidiKiiis trees. 



Fig. id. — EviTyrcfu trcos. 



Fig. 20. — Elevated statiuns. 



.« MINIMA. 



MFAN. 



. MAXIMA. 



Fia. 22.— Vouii'' forest (F.iutzel). 



