6
Table IV.
Rate of Brock Standard Mean Time Clock in 1897.
-
r2 +070-01.073 (r− 75°) −0.0020 (t*. — July 1.)
7
Table V.
Errors of Time-Ball in 1897.
330
means too late.
Period.
Observed rate.
Temp.
"
T
Arc.
a
Calculated rate.
+ means too early,
Je
❤
}
4
*.
K.
8.
Date.
Jan.
Feb.
Mar.
April.
May. Jane. July. Aug. Sept. Oct.
Nov. Dec.
December 30-January
January
9..
+1.36
79.1
4
9 42
+1.27
+0.00
-0.2
0.1
0.1
0.1
0.1
9.
19,
+-1.39
71.2
4
7 80
+1.34
+0.05
J
0.1
0.1 +0.2
0.1
0.1
0.1
0.1
0.1
0.1
11
0.1
0.1
-0.3
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
19--
>
29,.
+1.53
68.1
4
6 18
+1.59
0.00
4
+0.2
0.1
-04
0.1
+0.4
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1 -0.5
+0.5
0.1
0.1 +0,2
+03
+0.2
0.1
0.1
29-February
+1.35
70.9
4
4
54
+1.25
+0.10
6
+0.3
-0.4
0.1
+0.4
0.1
+0.3
0.1 +0.3
+0.2
0.1
0.1
+0.4
-0.3
0.1
0.1
+0.5
0.1 +0.3
+0.2
0.1
February
མ---ཙ
18,
+181
62.7
4
6 24
+1.88
-0.07
18
+0.4
-0.3
0.1
-0.2
0.1 +0.3
+0.3
9
+0.6 -0.8
+0.6
0.1
0.1
0.1
-0.3
0.1 +0.3 +0.3
0.1
0,1
18-
28.
+1.70
63.2
4
3 48
+1.82
-0.12
香り
+0.7
0.1
0.1
0.1
0.1
-0.4
+0.7
"7
+0.3
+0.3 +0.4
0,1
+0.8
0.1
-0.2
0.1
0.1
0.1
(),。
0.1
+03
0.1
0.1
28-March
*
10,
+1.68
67.4
4
0 0
+1.49
+0.00
110
+0.9
-0.2
0.1
-0.2
0.1
0.1
0.1
-0.3
0.1
0.1
0.1
0.1
13
+10
0.1
0.1
0.1
0.1
0.1
0.1
-0.3
0.1
0.1
+0.3
March
10--
20,.
+1.49
68.9
4
Sie
18
+1.37
+0.12
114
41.1
0.1
+0.2
+0.2
0.1
0.1
0.1
0.)
0.1
0.1
0.1
0.1
.
15 0.1
0.1
+0.9
0.1
0.1
0.1
0.1
0.1
0,1
0.1
10
30,
#
"}
+1.12
71.2
4
2
0
+18
-0.06
110
+0.4
0.1
1.1
0.1
+0.2
0.1
0.1
0.1
40.2
+0.2
17
+0.8
+0,2
0.1
0.1
0.1
0.1
0.1 -0.8
1,1
+0,3
+0.3
})
30-April
9.
+1.23
71.4
4
0 30
+1.14
+0.09
08
+0.8
+0.2
+0.2
0.1
0.1
0.1
-0.9
+0.2
+0.3
+0.9
119
-0.2
+0.3
+0.3
+0.2
--0,2
0.1
0.1
+0.3
0.1
+0.2
April
9-
13
1,
+1.15
72.0
4
0 24
+1.08
+0.07
-0.2
0.1
+0.9
+0.3
-0.83
0.1
0.1
+0,2
+0.4
+0.3
0.1
0.1
-0.0
0.1
+0.9
+0.4
0.1
+0.2
0.1
0.1
+0.3
0.1
i 400
0.1
19-
29,
?>
+0.90
74.5
4
1 18
+0.78
+0.10
-0.8 +0.2 +0.7
0.1
0.1
0.1
0.1
+0.3
0.1
0.1
:
9.1
-0.3 +08
0.1
0.1
0.1
+0.4
0.1
0.1
+0.2
-0.2
0.1
11
29-May
+0.50
78.5
4
1
30
+0.50
0.00
-0.4
+0.3 40.2
0.1
0.1
0.1
0.1
+0.2
-0.9
0.1
-0.3
0.1
+#2
0.1
+0.2
0.1
0.1
0.1
+0.2
-0.4
May
9-
19,
29
+0.58
82.3
4
0 24
+0.97
20
0.1
0.1
+0.94
0.1
0.1
+0.2
-0.9
0.1
0.1
0.1
0.1
0.1
0.1
+0.2
-0.2
0.1
-0.8
0.1
0.1
+0.2
38
0.1
19-
29,
33
++
+0.51
82.1
4
1 12
+0.26
+0.99
0.1
+0.3
0.1
0.1
-0.2
0.1
0.1
0.1
0.1
0.1
0.1
-03
0.1
0.1
0.1
0.1
0.1
29-June
"}
+0.22
$6.7
wigh
4
1
18
-0.02
+0.01
0.1 0.1
0.1
0.1 -0.2 -0.2
0.1
0.1
0.1
{),
0.1
0,1
0.1
0.1 -0.2
0.1
0,1
0.1
0.1
0.1
June
8མས་མ་
18,.
";
+0.17
84.2
4 1 18
+0.07
4000
0.1
18--
>>
"
28,
+0.02
82.6
4
0
48
+0.17
-0.19
17
28--July
+0.13
70.4
4
0
دن
+0.38
-0.95
July
18,
-0.01
83.1
4
0 80
+0.09
---0.10
18-
28,
-0.00
84.5
唼
0 30
-0.03
-0.03
#
19
J
28---August
-0.02
83.0
4 0 24
+0.01
-0.09
14. Observations for latitude by Talcott's method have been continued throughout the year and 339 observations of pairs of stars have been observed, distributed as follows:- In January 101 airs, in February 61 pairs, in March 7 pairs, in April 51 pairs, in May 134 pairs, in June 26 pairs, July 144 pairs, in August 152 pairs, in September 165 pairs, in October 147 pairs, in November 30 pairs, in December 141 pairs. The relative numbers give a clear indication of the way in which he atmospheric conditions interfere with astronomical observations in Hongkong. From the 1st June All the 31st December Mr. Plummer made all the observations.
August
7-
17
0.00
82.7
+
0 24
+0.00
-0.00
21
17-
27,
-0.03
81.7
4 0
6
+00
-0.14
13
13. The cisterns of the barograph and standard barometers are placed 109 feet above M.S.L. The bulbs of the thermometers are rotated 108 feet above M.S.L., and 4 feet above the
:
27-September 6,..
-0.10
83.1
3 59 36
-0.01
-0.09
September
a-
16..
-0.09
82.7
4
0 24
0.00
-0.09
وو
16-
26,..
-0.03
82.1
4
1 0
+0.02
-0.05
16. The monthly Weather Reports are arranged as follows:--
The olar radiation thermometer is placed at the same height. The rim of the rain-gange is 105 feet above IS.L., and 21 inches above the ground.
grass.
"
26-October
6..
-0.00
81.8
0 24
+0.02
-0.08
"
October
**
16,..
+0.10
70.4
4
1 42
+0.18
---0.08
16-
20,.
17
+0.12
76.8
4
1 42
+0.35
-0.23
26--November
-0.02
78.5
4
2
0
+0.20
-0.22
35
November
5--
**
15,.
+0.08
79.1
4
2 24
+0.14
-0.06
15-
25..
12
**
+0.48
71.9
4
4 48
+0.65
-0.17
95--December
D...
+111
67.5
+
4 36
+0.95
+0.16
15
December
5--
وو
10,.
+0.76
71.2
+
3 54
+0.66
+0.10
15-
25.
+0.99
68.0
4
+
18
+0.87
وو
}:
25-January
+0.79
70.2
4
ō 36
+0.69
+Q1 +0.08
Table I. exhibits the hourly readings of the barometer reduced to freezing point of water, but not sea level, as measured (at two minutes to the hour named) from the barograms.
Tables II. and III. exhibit the temperature of the air and of evaporation as determined by aid of otating thermometers.
Table II. exhibits also the extreme temperatures reduced to rotating ther- ometer. Table III. exhibits also the solar radiation (black bulb in vacuo) maximum temperatures duced to Kew arbitrary standard.
Table IV. exhibits the mean relative humidity in percentage of saturation and mean tension of fater vapour present in the air in inches of mercury, for every hour of the day and for every day of e month, calculated by aid of Blanford's tables from the data in Tables II. and III.
Table V. exhibits the duration of sunshine expressed in hours, from half an hour before to half hour after the hour (true time) named.
Table VI. exhibits the amount of rain (or dew) in inches registered from half an hour before to alf an hour after the hour named.
It exhibits also the estimated duration of rain.
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