(10)
TABLE SHOWING THE DIRECTION, DURATION AND VELOCITY
OF THE WINDS DURING 1887,-(Continued.)
(11)
TABLE SHOWING THE DIRECTION, DURATION AND VELOCITY
OF THE WINDS DURING 1887,-(Continued.)
Mouths.
Direction.
Duration in
hours.
Velocity in
Miles per hour.
Mouths.
Direction.
Duration in
bours.
Velocity in
Miles per hour.
Months.
Direction.
Duration in
hours.
Velocity in
Miles per hour.
Mouths.
Direction.
Duration in
hours.
Velocity in
Miles per hour.
MARCH,..................
N.
N.E.
E.
387
ༀ ཡཱ རྩྭ ཧྨ ས
28 10.9
-12
18-3
20.1
JUNE,.....
.........
N.
¡N.E.
IS 18-1
E. 131
S.E.
12-6
S.E. 48
S.
3:0
S. 304
S.W.
2
4:5
S.W.
W.
16
78
W.
59
184 13-1
29
N.W. 25
5**
N.W.
ફ્
1 2
143
118
10.9
SEPTEMBER,
X. 34
N.E. 78
9.7
244
NOVEMBER,.
N.
144
12.8
N.E.
158
116
E. 300 23.0
E. 318
158
S.E. 103 23.3
S.E.
47
110
S.
27
S.W. 17
13.9
S.
1
2·0
11:5
S.W.
2
8:0
W.
81
9.8
W.
12
6.2
N.W. 31 12:5
N.W. 10
6.6
Calm
40
0.5
Calm
28
07
76
7:0
OCTOBER,.
X.
158
14:4
DECEMBER,.
N. 198
11'5
Calm
16
0-7
Calm
10
0-7
N.E.
164
12.8
N.E.
120
10'5
E.
288
161 i
E. 317 15'7
འ ི ལ འོ མེ
APRIL,
N.
74
: 13:0
JULY,
X
19
6.1
N.E.
52
13.7
N.E. 65
196
E.
392
: 15:3
E.
290 146
S.E.
25
10:3
S.E.
93
18:3
i
S.
36
8.7
S.
33
7-7
S.W.
22
16:1
S.W
74
13.9
W.
29
74
W.
78
74
N.W. 36
18
N.W. 40
42
Calm 64
0.3
Calm 37
0-8
ریٹر
S.E.
69
8.9
S.E.
37
8.6
S.
16
8.8
N.
#
10
S.W.
3
6'0
S.W.
{}
9.5
W.
10
5.3
W.
31
***
81
X.W.
6
4.8
N.W.
9
6-2
Calm
12
0.6
Cali
22
08
TIDES.
MAY,
N.
32
N.E.
47 11.9
E. 493
S.E.
53
18-0
29
S.
30
S.IF. 46.
12.1
W.
23
N.W. 19
999 3 3
5-3 AUGUST,
N.
10
3-6
N.E.
39
ISE
8-6
E. 241 119
84
S.E. 71 144
9-1
M.
90 10:3
S.W.
131
16-0
91
W.
68
8-2
51
N.W.
16
7-1
Calin 25
0.4
Calm
78
0.6
The tides in the harbour of Hongkong are semi-diurnal but considerable difference often exists between the heights of two consecutive tides, the higher being called the "superior" and the lower the inferior" tide.
The difference in height of superior and inferior tides depends mainly upon the moon's declination either north or south of the equator.
At the times of the moon crossing the equator the tides are equal. The maximum range of tide may be taken as eight feet and the highest water under ordinary circumstances as 8 feet above Ordnance Datum and the lowest 1 foot below that Datum.
Tidal Observations.With a view to ascertaining the general effect of the tidal currents at the points proposed for the sewer out-falls, ¿.e., Belcher's Point to the west of the city and North Point to the east, I made in conjunction with Mr. Jas. SAMPSON of the Public Works Department several float experiments on the 27th and 28th of February last during the North East Monsoon, and again on the 21st and 22nd of August during the South West Monsoon.
The floats used consisted of wooden buoys conical in shape, five feet in height and two feet in diameter from which were suspended wrought iron vanes 4 feet by 1 foot 6 inches of T shape construction and so designed as always to keep the The total weight of a float was larger surface of the vane square to the current.
286 lbs. and the depth of the vane below the surface of the water was about 7 feet.
283
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