I 
o 
a 
3 
en 
-3 
q> 
S 
3 
g 
c; 
Com- 
puted 
evapo- 
ration 
t^ro »o r~ococoo->*©ioro t~ -^cooo eo m 
lOUJ CD CD h. X O O rt M M M CO ■* ^Ji t»< lO lO 
0105 O OOOOOOOOO o ooo o o 
++ + +++++++++ + +++ + + 
+ 1057 
+ 1059 
t^ CN CN NNOTOiflii'JUOOl iO tN MO ■* t^ 
CO O CM OhHtNOtOHHfl o> CO 00 O CI -H 
t^oo oo Nt^MaoxaOfflOo o ooo o ■■* 
i i i i i i i i i i i i i TTT 7 T 
co b- 
CN 00 
rH O 
T T 
Computed 
evapo- 
ration 
t- <N CO CNncONNOffliO^ 00 t^. CN CN U5 CN 
+ + + + + + + + + + + + + + + + + + 
CN CN 
+ + 
Net 
rise 
* * 
CO •£> O BlOMWflHOHil CO t^iOCN OS CO 05 CN CO CO 
CO CN CN CN CO ■- "* "3 CO ■>* CO iO CN CN CN m CO CO 
+ 1 1 ++ 1 1 1 + 1 1 1 1 1 1 + 1 1 1 1 1 + 
Total 
correc- 
tion 
lfO[OMOOtOWMHOH<j(t»^ioi»COI»t«CNCi)91MOc5^ 
i i i i i TTT i + i TT i i i i TT i i i TT i i 
1 
o 
a 
_2 
o 
<u 
H 
h 
o 
O 
Run-off 
from 
land 
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1* 1 
1 
e 
a 
Rainfall 
on 
lake 
cocO'cuiotoNitionHrHniooocoNocoooinM'OWHNio 
i i i i i TTT i i i i TT i i i i TT i i TTT i i 
Outflow 
to 
Erie 
cococococococo'^<cococO'*cocO'^ , '») , '*cocO'<)<cococococococo 
1 
CO 
C) 
W 
,-1 
+++++++++++++++++++++++++++ 
n 
< 
Inflow 
from 
Superior 
I 1 I 1 I I I I 1 1 1 I I 1 1 I 1 I 1 I I I 1 I I I I 
Rise of 
mean lake 
surface 
ooooooooooooooooooooooooooo 
+1+1 ++I 1 1 M+III+I+III+I+ 
Observed 
elevation 
corrected for 
wind and 
barometric 
effects 
580. + 
N^C3incBO>0000*'liO>OlOOHnN'Jio>Mt^C)OiOONH«5 
^(•Nt'NNNNt-h.t-tDOCCXDt-tOcOiOCDiOCCHOiOiO'O'O'n 
s 
Observed 
elevation 
of lake 
surface 
580. + 
HOOeOOOO^HOHOOCONNiOOOWtOiO«5HOM^iO(X) 
s 
0) 
C3 
P 
HiO(Ct>.Q0050HMCOi<iOON00050HiNM^iOONGOaOH 
o 
o 
« 
72 
