234 
INDEX 
Pages 
Lake Michigan-Huron — Continued 
evaporation. Amount of 84-85 
evaporation. Comparison of daily com- 
puted, with observed fall of lake 
surface 84-90 
evaporation and run-off. Example of 
observation equations used in 
attempt at simultaneous deter- 
mination of 110-111 
evaporation and run-off. Final normal 
equations 111-112 
evaporation curve as computed from re- 
sults of Solution y 2 94-96 
evaporation daily, 1909-1913 52-72 
evaporation observation equations, 1909- 
1913 73-80 
Ei, final value of, from observations on . . 80-81 
E 2 , final value of, from observations on . . 80-81 
income and outgo. Total daily correction 
for, 1909-1913 62-72 
inflow into, from Lake Superior, daily, 
1909-1913 52-72 
inflow into, from Lake Superior. Ex- 
ample of computation of 30 
normal equations. Final ones for deter- 
mining evaporation 80-81 
outflow from, daily, 1909-1913 52-72 
outflow from, to Lake St. Clair. Example 
of computation of 31 
rainfall on, daily, 1909-1913 52-72 
residuals from Solution Vs 85-90 
run-off, constant part of. General 
method deriving approximate 
value 16 
run-off from land, daily, 1909-1913 52-72 
run-off. Method of revising first approxi- 
mation to constant part of 117-118 
run-off. Variable part 102-112 
Solution T(,, containing evidence that 
evaporation is linear function of 
wind velocity 99-103 
storage. Change in, n, r 2 , r 3 , . . . r 6 . 
Example of computation of . . . . 104-110 
surface elevation. Daily rise of mean, 
1909-1913 52-72 
surface level. Daily rise of mean. Ex- 
ample of computation of 33 
vapor-pressure potential above surface of. 
Example of computation of . . . 25 
wind travel over surface of. Method of 
computing mean 29 
Lakes Michigan-Huron and Superior 
evaporation solution. Principal facts 
from final on 81 
Lake Nipigon, outflow to Lake Superior, how 
treated 30 
Lake St. Clair, inflow into, from Lake Michi- 
gan-Huron. Example of com- 
putation of 31 
Lake Superior 
center of gravity of area of 24 
depths in 23 
evaporation, as determined by Solution 
BB t 90 
evaporation curve, as computed from re- 
sults of Solution BB 2 94-96 
Ei, final value of, from observations on. . 81 
Ei, final value of, from observations on . . . 81 
inflow into, from Lake Nipigon 31 
nodal lines on 23 
Pages 
Lake Superior — Continued 
normal equations. Final ones for de- 
termining evaporation 81 
outflow from, to Lake Michigan-Huron 
1909-1913 52-72 
run-off, constant part 
approximate value of 16 
first approximation to adopted value 
of 19 
first estimate not revised 118 
method of estimating approximate 
value 17-19 
run-off, variable part 112-117 
Solution BBz shows evaporation curve is 
not concave upward 94 
Solution Vz, containing evidence that 
evaporation curve may be con- 
cave upward 99-102 
Lake surface 
as disturbed by winds 22 
rise in mean level of. General method of 
evaluating 19 
rise in mean level of, daily, 1909-1913 . . . 52-72 
Land, evaporation from. Definition 16 
Least-square solutions. Final seven for de- 
termining evaporation 90-92 
Mackinaw 
water levels, as affected by barometric 
pressures 21-22 
water levels, as affected by winds 22-23 
water levels, corrected for winds and 
barometric pressures 44-51 
Marquette 
water levels, as affected by barometric 
pressures 21 
water levels, as affected by winds 22-23 
wind effects at 23 
Mean lake level 
rise of. Example of computation of 61 
Mean, median and mode 
of frequency distributions 217 
relation to constant part of run-off 211-219 
Melting 
decrease in rate of 156-167 
example of computation of 159 
period of decrease in rate of 
example of estimate of beginning. . . 158-159 
fixing beginning and end 157-158 
Method 
of converting flood-flow constants to per- 
centages 176-177 
of converting normal-flow constants to 
percentages 163-165 
of estimating stream-flow, applications to 
other streams 222-229 
of estimating stream-flow. Rules for ap- 
plying 226-228 
of procedure on Streams A and B 146-147 
of smoothing the normal stream-flow con- 
stants 165-166 
used in investigation 6 
Meyers, Prof. Adolph 
evaporation formula. Comparison with 
one developed in this investiga- 
tion 122-126 
Milwaukee 
water levels, as affected by barometric 
pressures 21-22 
water levels, as affected by winds 22-23 
water-levels, corrected for winds and 
barometric pressures 44-51 
