TREE-TOP AND OPEN FIELD TEMPERATURES. 



67 



highest (also equally divided between deciduous trees and evergreens) 

 were similarly treated, with the result shown in Fig. ."55. There ap- 

 pears no unmistakable ditfcrcnce l)etweeii them due to auything but 

 iudividual irrecularities. 



Fig. 35. — Tree-top teuiperalure ditiennces lor lour stations with average lieight ot'4G feet. 



The stations for deciduous trees and for evergreens were then aver- 



aged 



KiG. ;!6. — Tree-top temperature dilierenees, German .statious ( W — O) — deciJuou.s trees. 



separately, as for the preceding stations. Fig. ?)Ci is the diagram 



Deciduous tics. Kvenjntu tracti. A viiitije of all. 



FlQ. 37.— Tree-top temperature dilierenees, German stations (TV— (»— evergreen trees. 



for deciduous trees; Fig. 'M Ibi- the evergreeus. The reductions for 

 evergreen trees are less in (juantity than for the deciduous, and are 

 distributed more evenly through the year. 



