Ig1t] FULLER—EVAPORATION AND SUCCESSION 203 
two consecutive weeks being nearly or quite to cc. per day during 
May and the first part of June, and on two occasions amounting 
to an increase of 100 per cent in one week as compared with the 
preceding. This occurring early during the growing period would 
doubtless be very unfavorable for the development of any seedlings, 
especially as it was followed by the very high rates of the succeed- 
MAY JUNE JULY: AUGUST SEPTEMBER] OCTOBER 
| 
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30 / 4 
\ E 
| 
ae” 
25 : 
\ N A 
Hi tl 4 
Hitt / 
ALL aN 
Lith \ 
se | y \ / 
| i | iN age | 
it | \ a ! bre / \ Lh, | 
vel EL AA i ae ee /\\ ‘é 
lilt OA Pe i\i 4s 
i ‘ f A hn, 1 
4 i Hj pra ‘ a ‘ x 
op i t i \ i i “L “ \ \ Py \, ‘ | x 
eS i \ iAd i f he x \ | ih / 
= 1 E iH E ‘a ; Ni Hi ‘ s / 
NT, RTM ast 
S ¢/ ‘ 4 Ar il ’ / 
5 sy ve yf \ oe “a y 
Y Re ; 
Cottonwood dune ememmmmee y oe - 
; tee oe 7 
cena ene he - el 
Oak dune 
Beech-maple forest —...-.--.. =: 
Pd 2 te 
Fic. 4.—Mean daily evaporation rates in the sand dune plant associations and 
in the iene maple forest. 
