INDEX 
233 
Pages 
Example of computation of — Continued 
D„, Stream A 179-180 
— , Stream B 160-161 
E w ' 
-F, Stream B 173-174 
inflow into Michigan-Huron from Super- 
ior 30 
Ii, rise in mean level of Lake Michigan- 
Huron 33 
net melting 159 
(m-O 1 ), (ttj-Gz) 183-184 
outflow from Lake Michigan-Huron to 
Lake St. Clair 31 
n, r-2, 7*3 .. . flio, Stream A 151-156 
T\, r-i, rj . . . »6. Lake Michigan-Huron.. 104-110 
rise of mean lake level, / 51 
run-off 
constant part of, Lake Michigan- 
Huron 17-19 
constant part of, Lake Superior. .. . 17-19 
(t-T"), ZiU-T") 187 
vapor-pressure potential, Lake Michigan- 
Huron 25 
wind correction 43 
wind term, ( 7W^~ X )• Lake Michigan- 
Huron 29 
x/ and x, Stream A 185-186 
Xn, Stream A 184-185 
y„, Stream A 186-187 
2/ and Z, Stream A 188-190 
z„, Stream A 188-189 
Examples of computations used in the deter- 
mination of C, F and M 179-194 
Factor 
lake rainfall conversion, 
Lake Michigan-Huron 12 
Lake Superior 13 
land rainfall conversion, 
Lake Michigan-Huron 14-15 
Lake Superior 15 
rainfall conversion, 
Lake Michigan-Huron 12 
Lake Superior 13 
Lake Michigan-Huron land drain- 
age area 14-15 
Lake Superior land drainage area. . . 15 
Figure 
A 123, 124 
B 127, 128 
Fitzgerald evaporation formula. Compari- 
son with one developed in this 
investigation 126-129 
Flood-flow constants. Conversion to per- 
centages 176-177 
equation for. Form of 139 
equation, Stream A 178 
normal equations. Examples of 174-175 
Stream B. Observation equations for. 
Example of 172-173 
substitution in observation equations. 
Example of 177-178 
Forecasting stream-flow, application this 
method to 228-229 
Forest cover, determining effect of, by this 
method 229 
Formula evaporation. Final one derived in 
this investigation 82-84 
Freeman, John R. 
evaporation formula. Comparison with 
one developed in this investi- 
gation 122-126 
r.v.i ■ 
Freezing-melting constants 
examples of computations used in the 
determination of 179-194 
final derived values of 193-194 
final solutions for determining 192-194 
normal equations 191 
observation equation. Form of, for de- 
termining 141-143 
observation equations for determining. . . 188-191 
principal facts from two final solutions 
for determining 192 
Freezing-melting period, definition 156 
Freezing-melting theory 140-143 
Frequency 
ratios. Weighted mean 218 
curve. Equation of, Stream A 214 
curve. Moments of, Stream A 212-214 
distribution. Mean, median and mode of 217 
ratio, Stream A 215 
General conclusions to Part I. Summary of. 119-120 
conclusions to Part II. Summary of . . . . 229-230 
Graphs, computed stream-flow tested by. . . . 199-205 
Ground-water 
storage, decrease in 16 
Harbor Beach 
water level at, 
as affected by barometric pressures. 21 
as affected by winds 22-23 
corrected for winds and barometric 
pressures 44-51 
Horton, Robert E. 
evaporation estimate, Lake Michigan- 
Huron. Comparison with re- 
sults this investigation 126 
rate of melting of snow. Comparison 
with results this investigation . . 194 
Hourly barometric effects 19-20 
I e , method of estimating for 
Lake Michigan-Huron 17-19 
Lake Superior 17-19 
Income and outgo Lake Michigan-Huron. 
Total daily correction for, 1909- 
1913 62-72 
Inflow from 
lakes above 16 
Lake Superior to Lake Michigan-Huron, 
1909-1913 52-72 
Inflow into 
Lake, Is. General definition 9 
Lake Michigan-Huron 11 
Lake Michigan-Huron. Example of 
computation of 30 
Lake Superior 30 
Introduction 
to Part 1 3-5 
to Part II 133 
Investigation 
final evaporation formula derived in ... . 82-84 
methods used in Part 1 6-7 
methods used in Part II 146-147 
outcome of, Part 1 7-8 
outcome of, Part II 134 
scope of, Parts I and II 6-7 
Kankakee River 216 
Lake Erie, inflow into, from Lake Michigan- 
Huron, 1909-1913 52-72 
Lake Michigan-Huron 
elevation, mean daily, corrected for winds 
and barometric effects, 1909- 
1913 52-72 
elevation, mean daily, observed, 1909- 
1913 52-72 
