A 
Absolute maximum and minimum 
air temperature, 18 
for groups, 19 
relative humidities, 46 
for groups, 48 
sea-surface temperatures by 
groups, 30 
vapor pressures, 41 
Absolute maximum 
pressure, 4 
sea-surface temperature, 29 
temperature, 19 
Absolute minimum 
pressure, 4 
sea-surface temperature, 29 
Abstract of log, 63 
Acknowledgments, 2 
Air- and sea-temperature differences 
diurnal variation of, 35 
variation of vapor pressure with, 
45 
variation of, with relative humid- 
ity, 5 
Air- and sea-surface temperature 
differences, variation of, with 
latitude, 35 
Air- and sea-temperatures, 
differences between, 36 
diurnal variation of, 36 
Air temperature 
absolute maximum, 18 
for groups, 19 
absolute minimum, 18 
for groups, 19 
diurnal amplitude of, variation 
with latitude, 21 
diurnal variation of, 21 
effect of wind on, 21 
Fourier analyses of, 22 
frequencies of hours of maximum, 
by groups, 20 
frequencies of hours of minimum, 
by groups, 20 
harmonic coefficients of diurnal 
waves of, 24 
hourly values of, for groups, 14, 
16 
, 
hourly departures of, according to 
latitude, 23 
hour of mean maximum and mini- 
mum, for groups, 19 
instruments, 13 
maximum and minimum of, 18 
mean daily maximum and mini- 
mum, for groups, 19 
mean, for groups, 17 
variation of mean, with latitude, 17 
variation with changes of, 54 
variation of vapor pressure with, 
46 
Alaska, 
Gulf of, 42 
Peninsula, 19, 46, 47, 55 
Ambon to Batavia, 21, 35 
Amplitudes and phase angles of diur- 
nal and semidiurnal oscillations 
of sea-surface temperature 
from observations on Carnegie, 
Gauss, and Challenger, 35 
Amplitude, 
c2, computed and observed of, 
comparison with, of 12- 
hour waves of atmospheric 
pressure at sea, 9 
daily, of atmospheric pressure, 4 
periodic, 4, 6 
INDEX 
Amplitude, daily, of atmospheric pres- 
sure, unperiodic, 4 
diurnal, 
of relative humidity, effect of 
wind on, 49 
of vapor pressure, effect of 
wind on, 45 
eae with wind velocity, 
maximum, time of, 11 
of air temperature, diurnal, varia- 
tion with latitude, 21° 
of atmospheric pressure, at is- 
lands, 11 
of relative humidity, diurnal, var- 
iation of, with latitude, 49 
of sea-surface ‘temperature, ‘diur - 
nal, variation of, with lati- 
tude, 32 
of twelve- hour wave over ocean, 11 
of vapor pressure, diurnal, varia- 
tion with latitude, 45 
periodic, 
on calm days, 33 
on windy days, 33 
unperiodic, 33 
daily, 4 
clear days and cloudy 
days, 33 
of atmospheric pressure, 6 
Anemometer, Tycos, 52 
Aneroid, barometer, 2 
Analysis, Fourier (harmonic coeffi- 
cients) of diurnal waves of at- 
moeph erie pressure, results of, 
Apia, 2, 72 
Ascension, 25 
Assmann psychrometer, 13, 14, 39, 52 
observations with, 39 
Atlantic Ocean, North, sea-surface 
tengperatures, 38 
Atmospheric pressure, 
absolute maximum, 4 
absolute minima, 4 
barograph, 2 
barometers, 2 
Caribbean Sea, 3 
Carnegie values of, 3 
comparison of twelve-hour waves 
of, 
computed and observed am- 
plitude, cg, at sea, 9 
from observations at sea and 
as computed by Simp- 
son, 8 
of islands and at sea, 10 
on Gauss and Carnegie, 8 
daily amplitudes of, 4 
periodic, 4, 6 
unperiodic, 4 
Gulf Stream to Barbados, 3 
Hamburg to Iceland, 3 
highest daily mean, 4 
lowest daily mean, 4 
maxima, 4 
mean and extreme values of, for 
latitude ranges, 4 
mean for latitude ranges, 4 
minima, 4 
monthly distribution, number of 
days, atmospheric-pressure 
observations within each 
latitude range, 9 
normal values of, 3 
oscillations, diurnal of, 6 
phases of twelve-hour waves of, 
over South Pacific Ocean, 11 
165 
Atmospheric pressure, San Francisco 
to Apia, 3 
South Pacific Ocean, 3 
unperiodic amplitudes of, 6, 9 
variation of, diurnal, 5 
Aurora borealis, 58, 65 
B 
Balboa, 67 
Barbados, 65, 66, 67 
to Callao, 36 
Barograph, 2 
Barometers, atmospheric pressure, 2 
aneroid, 2 
mercurial, 2 
Paulin-type aneroid, 2 
Bartels, J., 2 
Batavia, 7 
Ambon to, 21, 35 
British West Indies, 
Barbados, 65, 66, 67 
to Callao, 36 
Brooks, C. F., 2 
c 
California, 17 
Current, 17, 32, 33, 38 
San Francisco, 38, 74, 76 
Calm day, periodic amplitude of sea- 
surface temperature of, 33 
Canal Zone, 
Balboa, 67 
Colon, 38, 67 
Canvas bucket and sea-water ther- 
mometer, 27 
Caribbean, 19, 30, 38, 43 
pressures over, 3 
Challenger, 8 
Chile, 35 
Christmas Island, 30 
Clear days, unperiodic daily ampli- 
tude of sea temperature, 33 
Clouds, 57 
cloudiness, 54 
effect on diurnal variation of 
sea-surface tempera- 
ture, 32 
mean, 
for groups, 58 
for ranges in latitude, 58 
Cloudy days, unperiodic daily ampli- 
tude, 33 
Colon, 38, 67 
Coastal Peru Current, 17, 27, 38 
Comparison of 
Carnegie and normal values of at- 
mospheric pressure, 3 
maximum pressure of air temper- 
ature of Carnegie with 
Potsdam, 26 
mean phases of six-hour waves of 
atmospheric pressure be- 
tween latitudes 15° north 
and 15° south after Hann and 
Pramanik, and from Carne- 
gie, 12 
mean vapor pressure for raindays 
and rainless days, 45 
sea-surface temperatures with 
those measured at each 
oceanographic station, 27 
twelve-hour waves of atmospheric 
pressure 
at sea, computed and observed, 
