75
463
The radius of the calm centre was 12 miles at Tamsui, perhaps it was only 5 miles at 4 p. on the 7th :-
LOWEST READINGS OF THE BAROMETER SEPTEMBER 6TH TO 8TH.
Station or Vessel.
Keelung,
Tamsni,
Turnabout,
Ockseu,
Chapel Island,
S.S. Loosok,
Fisher Island,
Lamocks,
S.S. Sydney,
§ Breaker Point, ..........................
Hongkong,..
Reading.
Date and Hour.
Distance and bearing of centre.
28.46 28.66
September 6 9.30p.
6 midt.
""
29.17
7 42.
>>
29.25
7 9a.
"
29.21
7 3p.
13 miles NNW
15
W by S
35
25
SE by E ESE
"
20
33
E by S
28.74
"J
7 5.30p.
29.20
>>
7 1p. and 1.30p.
29.19
"
7 11p.
29.14
>>
7 9.50p.
29.28 29.50
8 3a,
near centre.
50 miles NW by N
10
S
19
near centre,
15 miles SSE
"
8 noon.
50
"
SE by E.
33
* No readings taken between 10p. and midnight while centre was passing over this place.
† Reading uncertain, the correction not being accurately known at the time.
§ From tri-hourly observations.
On the 6th and 7th it was densely overcast to the north of the centre within 300 miles and to the south, east and west within 100 miles. On the 8th it was overcast within 100 miles of the centre. It was raining within 200 miles to the north of the centre and within 100 miles on the other sides of the centre. The rainfall was excessive at the stations near the northern entrance to the Channel, but became comparatively small at the stations in the South of the Channel near to which the centre after- wards passed. There was a high cross sea within 300 miles of the centre.
This typhoon though not a subsidiary depression may still be considered to be one in the same sense as cyclonic storms in Great Britain are considered subsidiary to the low pressure centre near Iceland. We see the effect of this in strong NE winds to the North of Formosa, in prevailing NW winds in South Formosa, in the weakness of winds to the SE of the centre compared to those NW of the centre, while the centre was in the Formosa Channel, in the N winds encountered at a distance to the SW of the centre and in the course towards SW which the centre took and of which there is no
previous case on record in the Formosa Channel. The centre was carried round a point situated SE of South Cape. From this point the low pressure subsequently approached S. Japan and in the neighbourhood of the same place, SE of S. Cape, the next typhoon appears to have originated about the 17th September, and the latter typhoon proceeded WNWard moving round a point in the China Sea which the preceding typhoon which had moved SWard had approached on the 10th September. Subsequently another typhoon originated about the 23rd September in the China Sea a short distance towards the SE of the point where the two previous typhoons had disappeared on the 11th and 20th September. The last mentioned typhoon then moved NNEward in the China Sea keeping the low pressure area on its left. The movement of all these typhoons was caused by their centres being pressed forward by winds circulating against the sun, round an area with comparatively low pressure.
The following are the observations for noon of the 8th September:--
COAST STATIONS.
Bolinao,
Hoihow,
Hongkong,
29.60 + .02
.63 .02
.50 .02
SW
1
NW
4
5 3
Or.
NW
1
0.
Canton,
.56
.00
NNW
1
O..
Breaker Point,
.48 + .05
NE
cmp.
Swatow,
.51 + .07
E
op.
Lamocks,
.51 +.08
NE
cm.
South Cape,
.51.14
calm
€.
Fisher Island,
.52 + .31
NE
2
Chapel Island,
.55 + .30
NE
3
3 3
C.
Amoy, ..............................
.56 + .19
NE
C.
Ockseu,
.57 + .23
calm
cp.
Turnabout,
.59 + .23
NNE
3
omr.
Tamsui.
Keelung,
Middle Dog, Foochow...... Steep Island, North Saddle, .......
.60.18
E by N
or.
.54 +18
NNE
2
C.
.55 + 18
NE
ein.
.58 + .17
NE
0.
.70
-
.02
NE
4
em.
.67
.00
NE
om.
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