166 
Comparison of twelve-hour waves of 
atmospheric pressure at sea, 
computed and observed, 
amplitudes cg, 9 
by Simpson, 8 
observed on 
Carnegie and Gauss, 9 
islands and at sea, 10 
mean yearly phase angles, 
for Easter Island, Sa- 
moa, and Jaluit, with 
those computed from 
Simpson's formula, 11 
Computed and observed amplitudes 
c2, of twelve-hour waves of at- 
mospheric pressure at sea, 
comparison of, 9 
Corrected values of Fourier coeffi- 
cients, amplitudes, and phase 
angles of 24-hour and 12-hour 
oscillations of air tempera- 
ture, 25 
Correcting for excessive daytime deck 
temperatures, 15 
D 
Daily 
amplitudes of atmospheric pres- 
sure, 4 
periodic, 4 
unperiodic, 4 
mean pressure, 
highest, 4 
lowest, 4 
range in vapor pressure, 41 
Dial, harmonic, 7, 8 
Distribution, monthly, number of days, 
atmospheric-pressure observa- 
fons within each latitude range, 
Diurnal amplitude of, 
air temperature, 
variation with latitude, 21 
ee with wind velocity, 
1 
relative humidity, 
effect of wind on, 49 
variation with latitude, 49 
sea-surface temperature, varia- 
tion with latitude, 32 
vapor pressure, 
effect of wind on, 45 
variation with latitude, 45 
Diurnal pressure oscillations, 6 
Diurnal variation, 15 
and differences between tempera- 
tures of sea and air 
corrected for noncyclic 
change, 37 
uncorrected, 36 
of air temperature, 21 
effect of wind on, 21 
of atmospheric pressure, 5 
of rainfall for groups, 57 
of relative humidity, 48 
for all days, 48 
of sea- and air-temperature dif- 
ferences, 35 
of sea-surface temperature, 31 
effect of wind on, 33 
of temperature, 25 
semidiurnal variation, 25 
of vapor pressure, 43 
for all days, 44 
Donau, 8 
Diurnal variabilities of pressure re- 
lated to heating and cooling of 
atmosphere, 21 
Dry-bulb lapse rates between deck, 
crosstrees, and mainmast, 18 
INDEX 
E 
Easter Island, 10, 38, 67, 68 
Electrical-resistance, Hartmann and 
Braun, 
psychrometers, 39 
thermographs, 13 
England, Plymouth, 64 
Equatorial Current, Southern, 38 
Counter, 38 
Evaporation, 52 
instruments, 52 
rates, 54 
Evaporimeter, 52 
F 
Fleming, J. A., 2 
Fog, 57, 58, 59, 75 
Fourier analyses of diurnal variation, 
of air temperature, 22 
of relative humidity, 50 
of sea-surface temperature, mean 
diurnal variation of, 34 
of vapor pressure, 44 
Fourier coefficients, 6, 8, 11 
Fourier quantities, 32 
Frequency distribution of unperiodic 
diurnal amplitude of 
relative humidity, 49 
vapor pressure, 43 
Frequency of days on which 
lightning was observed, by 
groups, 57 
rain occurred for groups, 57 
Frequencies of hours of 
maximum air temperature, by 
groups, 20 
minimum 
air Sgr ne hepa by groups, 
0 
relative humidity, 48 
temperature, 31 
occurrence of 
maximum 
nese aes temperature, 
vapor pressure, 42 
maximum and minimum 
air temperatures, 20 
vapor pressures, 43 
minimum vapor pressure, 43 
Frequencies of 
unperiodic daily amplitude of sea- 
surface temperature, 32 
wind directions at noon, for 
groups, 56 
G 
Galapagos Islands, 32, 38, 41 
Gales, 4 
Gauss, 7, 8, 31, 32 
Germany, Hamburg, 13, 35, 64, 65 
Greenland, South, 19, 43 
Greenwich mean noon observations, 
Groups used in compilation and dis- 
cussion of meteorological data, 
Carnegie, 1 
Guam, 38, 72, 73 
Guinea Current, 38 
Gulf of Alaska, 42 
Gulf of Panama, 35, 36, 41 
Gulf Stream, 33, 35, 36, 38 
to Barbados, pressures, 3 
H 
Hamburg, 13, 35, 64, 65 
to Iceland, pressures, 3 
Harmonic analysis of 
air temperature, diurnal waves 
of, . 
relative-humidity data, 49 
sea-temperature data, 33 
vapor -pressure data, 45 
Harmonic dial, 7, 8 
Hartmann and Braun Electrical- 
resistance 
psychrometers, 39 
thermographs, 13 
Hawaii, Territory of, 47, 55 
Honolulu, 76, 77 
Highest daily mean pressure, 4 
Honolulu, 76, 77 
Hourly departures of air temperature 
according to latitude, 23 
Hourly values of 
air temperature, 
Carnegie, 102 
for groups, 14, 15, 16 
atmospheric pressure, Carnegie, 
92 
relative humidity, 
Carnegie, 132 
for groups, 46, 47 
sea-surface temperature, 
Carnegie, 112, 
for groups, 28, 29 
vapor pressure, Carnegie, 122 
Hour of mean maximum and minimum 
air temperature for groups, 19 
relative humidity, 48 
vapor pressure, 42 
Humidity, 39 
instruments, 39 
Iceberg, 65 
Iceland, 18, 36, 38, 39 
Reykjavik, 65 
Instruments, 
air temperature, 13 
evaporation, 52 
humidity, 39 2 
International Scale, frequencies of 
various states of sea accord- 
ing to, 55, 56 
Introduction, 1 
Jaluit, 10 
Japan, 17, 38 
Yokohama, 38, 73, 74 
to San Francisco, 35, 58 
Jersey, Island of, 10 
Juan Fernandez Island, area, 36 
K 
Kuroshio Current, 32, 33, 38 
L 
Labrador Current, 38 
Lapse rates, 18 
Between deck and crosstrees, 15 
Between deck, crosstrees, and 
mainmast, 
dry-bulb, 18 
wet-bulb, 39 
Latitude ranges, 
