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TABLE V.
SHOWING THE HORARY OSCILLATION OF THE BAROMETER BETWEEN THE TROPICS OP
CANCER AND CAPRICORN.
T h is is an ab stra ct o f th e preceding T ab le , and shows th e amount o f the periodical oscillation
o f th e atmospherical column a t th e under-mentioned hours, as well as th e mean
a ltitu d e o f th e barometer a t each parallel. F rom th e difficulty o f registering th e barometer
on b o a rd a ship a t sea, these re sults are inseparable from discrepancies ; b u t th e averages are
on th e whole satisfactory, and ra th e r show an increase o f the atmospherical tides towards
th e equator. T h e results are th e differences from th e mean a ltitu d e o f tlie barometer for
eacli parallel.
N O R T H A T L A N T IC .
Latitude.
A.JI. P.M. Vib. of 31ean alt.
rtf
3 6 9 Noon. 3 6 9 Midnight. Column. Ui
Barometer
25" to 20"
20 — 15
15 — 10
1 0— 5
5 — 0
- 0 3 8
+ 0 0 4
- 0 2 9
-0 0 5
- 0 3 5
- 0 0 8
+ 0 2 9
-0 0 1
+ 004
- 0 1 4
- 0 2 8
-0 2 1
+0 3 7
+ 0 5 4
+0 3 2
- 0 0 1
- 0 5 7
- 0 J 3
- 0 3 7
-0 0 7
- 0 1 6
+ 019
+ 017
+ 038
- 0 0 5
+ 016
+ 0 0 8
- 0 0 7
- 0 0 9
+ 004
.054
.0.50
,066
.091
.067
30.139
30.121
.084
.063
033
Mean - 0 2 1 + 0 0 8 + 015 - 0 2 3 +011 + 002 .038 30.085
S O U T H A T L A N T IC .
I;atitude.
A. M. P.M. Vib. of Mean alt.
of
3 6 ^ i Noon. 3 6 9 Midnight, Column. Barometer
0" to 5«
5 — 18
1 0— 15
15 — 20
20 — 23
- 0 2 6
+ 006
- 0 7 3
- 0 3 8
- 0 2 4
+005
056
034
029
028
- 0 0 4
+ 006
016
002
Oil
- 0 5 4
- 1 0 9
+ 037
- 0 1 3
- 0 4 6
+0 3 2
Oil
002
032
015
+0 4 6
+031
—003
+ 002
+018
.100
.169 1
.113
.079
.074
30.051
.104
.143
.163
.152
Mean - 0 3 1 + 0 3 0 + 006 - 0 3 7 + 018 + 019 .067 30.123
Mean of 1
N’orthAtl. J - 0 2 1 + 0 0 8 + 015 - 02:1 + 011 + 002 .038 30.08.5
Mn. of both - 0 2 6 + 0 1 9 + 011 - 0 3 0 + 014 + 011 .049 30.104
- Wll I
5^-^» ’::J;
N O R TH PA C IFIC.
*f ... ?
A.M. P M. • Vib. of Jlcan alt.
Latitude. cf
3 c 9 Noon. 3 a 9 Midnight. Column. Barometer
20«to 15«
15 — 10
10— 5
5— 0
- 0 3 0
- o n
- 0 4 0
+ 003
(K)0
-0 0 1
- 0 3 0
- 0 0 7
000
- 0 1 0
+ 010
+ 0 2 3
- 0 1 0
+ 029
+ 010
+013
- 0 3 0
- 0 5 1
- 0 3 0
- 0 3 7
- 0 2 0
+ 039
+ 010
- 0 1 7
+ 044
- 0 2 1
+ 040
+ 023
+ 0 4 0
+ 0 3 9
+ 040
+0 0 3
.074
.090
.070
.060
29.957
30 020
.061
.180
Mean - 0 1 9 - 0 0 9 + 006 + 010 - 0 3 7 + «13 4-022 + 030 , 059 .30.054
SOUTH PACIFIC.
A.3 I P.M. Vib. of .Mean alt.
Latitude. of
3 c 9 Noon. 1 3 « 1 9 Midnight. Column. Barometer
0«to 5«
5 — 10
1 0— 15
15 — 18
Otaheite.
000
- 0 2 3
- 0 1 3
- 0 1 2
- 0 0 5
- 0 0 3
+ 0 0 7
+ 0 0 7
- 0 1 2
- 0 0 4
000
+ 022
+ 017
- 0 0 8
+ 004
- 0 2 0
+ 022
+ 007
+ 003
- 0 0 4
000
- 0 4 8
- 0 0 8
- 0 1 3
+ 0 0 3
+ 002
+ 032
+ 0 4 7
- 0 0 9
; - 0 0 2
- 0 0 1 i
+ 002
- 0 4 3
- 0 1 2 '
000
+001
+ 012
- 0 0 3
- 0 1 0
+ 002
.022
080
.090
.016
.008
30.016
.023
.023
29.995
Mean - O i l - 0 0 1 + 007 +001 - 0 1 3 - o i l ] +0 1 4 000 .027 30.016
Mean of )
N. Pacific i - 0 1 9 - 0 0 9 + 006 + 010 - 0 3 7 +0 0 3 + 022 + 030 .059 30.054
Mn. of both - 0 1 5 - 0 0 5 + 006 + 005 ' - 0 2 5 - 0 0 4 1 + 0 1 8 + 015 .043 .30.035
N OR TH PACIFIC.
A M. P M. Vib. of Mean alt.
of
3 3 c 9 Midnight. Column. Barometer
San Bias
to 18«
Acapulco
to 14« N.
to 5« N.
to Equator
- 0 2 7
004
019
019
012
015
+ 008
+ 006
- O i l
- 0 2 2
—002
+ 005
4 008
+ 002
—005
- 0 0 8
+0 1 4
+ 015
+ 024
020
004
018
014
015
- 0 1 9
- 0 1 0
+ 021
- 0 0 0
- 0 1 2
- 0 8 5
- 0 2 7
- 0 1 2
+ 002
+ 004
- 0 2 8
+ 0 1 5
+031
- 0 0 6
+ 032
+ 001
+ 010
-0 1 5
+ 004
004
017
006
018
002
.058
.032
.040
.040
.042
.100
Rlean - 0 1 6 - 0 0 3 + 004 + 016 - 0 1 7 - 0 0 8 + 012 + 008 .032
SOUTH PACIFIC.
AM. P.M. Vib. of Mean alt.
Latitude. rtf
3 « 9 Noon. 3 G 9 ' Midnight. Column. or
Barometer
Equator 2«
2« to 14«
14«toTrop.
- 0 2 2
006
016
- 0 0 2
+ 0 0 6
- 0 0 6
+ 028
006
024
+ 028
- 0 1 6
+ 020
- 0 4 2
024
024
- 0 1 2
026
018
- 0 1 2
+ 010
000
+ 018
024
016
.072
.050
.048
¡Mean - 0 1 6 - 0 0 1 + 019 + 005 - 0 3 0 - 0 1 9 + 007 + 019 .049
Jlean of 1
N. Pacificj - 0 1 6 -0 0 3 + 004 + 016 - 0 1 7 - 0 0 8 + 012 +0 0 8 .032
Mean - 0 1 6 - 0 0 2 + 011 +011 - 0 2 4 - 0 1 3 + 010 + 014 .037
IMcan of ]
fonner setj - 0 1 5 - 0 0 5 + 007 +006 - 0 2 5 - 0 0 4 + 018 + 015 .043
Mean of )
Atlantic Ì - 0 2 6 + 019 + 011 - 0 3 0 + 0 1 4 +011 .049
m