292 BOTANICAL GAZETTE [APRIL 
he found that the stomata opened rapidly, beginning at about 
5:00 A.M. and reaching a maximum about 8:00-9:00A.M. The study 
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too 1100 a — 10}oo iijoo ~~ iajoo—*C*sSoo~S—=C~SY~—C*«CSYSC~SC*«*ST CCU 
- 3-—Records for station NV, taken September 2, ice sradual rise os isk 
eee in transpiration index, with approximate concurrence of maxima 
Fic. Geese & or stations Ht and J, ey on Fane 8, Shateitae pronounced 
depression in transpirati n index caused by precipitation; note that both temperature 
d evaporation curves on like Sens and subsequent rise 
of Tilia in its more normal habitats on clay has shown a variation 
from this behavior. Figs. 1, 2, 3, and 4 show that, quite unlike 
the customary behavior in positions strongly exposed to light, the 
