AIR TEMPERATURES IN FORESTS AND OPEN FIELDS. 55 



Forest air lempcraliire diffcrciian. tcooda and open fields ( /(' — <>). 



Fi,;. 10.— Fiit<lri(lisio(le. 



Fin. H. — Hagenau. 



Flti. 12.— Simueiiberir. 



.MINIMA. 



MEAN. 



MAXIMA. 



FlU. 13.— Eberswalde. 



