GROUP IX: CEYLON. 413
KOLOMBO.
' Latitude North. Longitude East Green. Height.
6°56'-6 79°49'-8p L.a.L.S. (18 feet.)
A. 1812. Edinb. Journ of Sc., V., p. 142; mean = - + f + 9.
o
7-4-3
1815. Davy. Account of Ceylon; mean -
1852-5. Officers commanding the Royal Engineers: Hawksbaw, Hope, Philpotte; Max., Min.,
9V2) 3V2. This very careful series included, besides the temperature, many most detailed ob-
servations on moisture, insolation, &c.
The very small variation of the temperature at Ceylon allowed of my including 1812 and 1815
in the general mean.
B. 1853-9. The mean of this series is contained in the Pari. San. Rep., Vol. II., p. 920. I add
the "Mean dry bulb," but I did not include it in the general mean, as from the combination
of the hours (not detailed) it is throughout warmer, also when compared to those years in-
cluded in the same period for which I had compared the copy of the full details.
A.
Months.
1812
Mean
of the
month.
1815
Mean
of the
month.
1852
SR.
~ a
c 2
1853
SR.
s 2
1854
SR.
1855
SR.
a) ^
General
mean.
Jan.
Febr.
March
April
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Year
79
80
81
83
83
81
81
80
81
79
80
79
81
0
0
5
0
1
75
75
9
5
63
75
8
79
80
82
84
83
81
80
80
80
79
78
77
80
2
4
38
33
8
7
3
6
23
4
75
85
75
75-8
78- 6
79- 0
79-3
78-3
77-6
74-9
74-0
72-9
87-8
83-7
83-7
83-5
82-8
82-3
82-3
82-9
81-9
81-8
81-1
81-3
81-4
80-5
79-9
78-6
78-4
77-3
83
84
86
85
84
83
82
82
83
82
82
83
for 1852:
for 1853: 80
76
74
74
for 1854: 79
0 82
82- 9
83- 3
85- 1
86- 0
85-1
83-4
83-3
82-6
82-0
81- 4
82- 8
81-5
for 1855: 79
78
79
81
82
81
81
80
80
80
79
78
78
80
General mean of the seasons and of the year.
Dec. to Febr.
March to May.
June to Aug.
Sept. to Nov.
Year.
78-8
81-8
80-8
79-4
80-2
B. 1853 to
1859.
January . . .
81
April ....
84-2
July.....
81-7
October . . .
81-1
February . .
82-2
May.....
83-4
August . . .
80-9
November . .
81
March ....
83-7
82-2
September .
81-6
December . .
80-8
KOLOMBO.
' Latitude North. Longitude East Green. Height.
6°56'-6 79°49'-8p L.a.L.S. (18 feet.)
A. 1812. Edinb. Journ of Sc., V., p. 142; mean = - + f + 9.
o
7-4-3
1815. Davy. Account of Ceylon; mean -
1852-5. Officers commanding the Royal Engineers: Hawksbaw, Hope, Philpotte; Max., Min.,
9V2) 3V2. This very careful series included, besides the temperature, many most detailed ob-
servations on moisture, insolation, &c.
The very small variation of the temperature at Ceylon allowed of my including 1812 and 1815
in the general mean.
B. 1853-9. The mean of this series is contained in the Pari. San. Rep., Vol. II., p. 920. I add
the "Mean dry bulb," but I did not include it in the general mean, as from the combination
of the hours (not detailed) it is throughout warmer, also when compared to those years in-
cluded in the same period for which I had compared the copy of the full details.
A.
Months.
1812
Mean
of the
month.
1815
Mean
of the
month.
1852
SR.
~ a
c 2
1853
SR.
s 2
1854
SR.
1855
SR.
a) ^
General
mean.
Jan.
Febr.
March
April
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Year
79
80
81
83
83
81
81
80
81
79
80
79
81
0
0
5
0
1
75
75
9
5
63
75
8
79
80
82
84
83
81
80
80
80
79
78
77
80
2
4
38
33
8
7
3
6
23
4
75
85
75
75-8
78- 6
79- 0
79-3
78-3
77-6
74-9
74-0
72-9
87-8
83-7
83-7
83-5
82-8
82-3
82-3
82-9
81-9
81-8
81-1
81-3
81-4
80-5
79-9
78-6
78-4
77-3
83
84
86
85
84
83
82
82
83
82
82
83
for 1852:
for 1853: 80
76
74
74
for 1854: 79
0 82
82- 9
83- 3
85- 1
86- 0
85-1
83-4
83-3
82-6
82-0
81- 4
82- 8
81-5
for 1855: 79
78
79
81
82
81
81
80
80
80
79
78
78
80
General mean of the seasons and of the year.
Dec. to Febr.
March to May.
June to Aug.
Sept. to Nov.
Year.
78-8
81-8
80-8
79-4
80-2
B. 1853 to
1859.
January . . .
81
April ....
84-2
July.....
81-7
October . . .
81-1
February . .
82-2
May.....
83-4
August . . .
80-9
November . .
81
March ....
83-7
82-2
September .
81-6
December . .
80-8