~~ a 
SE 
ON EFFECT OF WIND AND ATMOSPHERIC PRESSURE ON THE TIDES. 521 
Aberdeen, about 270 miles, varied from 0:12 inch to 0:49 inch, the 
depression being in the north, the barometer there being 1 inch below 
the average. On the 18th and 19th, the days of the gale, the barometer 
rose rapidly until it became in the north 0:21 inch above the average, 
and in the south 0:43 inch below, the gradient being reversed to 0°65 
inch on the 18th and 0°53 inch on the 19th, with the depression in the 
south. The general direction of the wind was north-west to north-east, 
blowing after midday on the 18th with a force from 8 to 10. The effect 
of these gales, blowing from opposite directions, affected all the ports 
round the coast, but in a very varying degree. On the north-east coast 
the effect was not great, but in the Wash and in the southern part of the 
North Sea its effect was felt to such an extent that at Boston the difference 
between two succeeding tides was 7 feet 8 inches ; at Yarmouth 6 feet 
2 inches, which is more than the total rise of a spring tide ; at Dover 
the variation was 5 feet 3 inches ; while at Portsmouth it was only 1 foot 
9 inches, and at Avonmouth 3 feet 9 inches. At Liverpool, on the 17th, 
the wind was blowing from 8.E. to 8.W. with force of 5; on the 18th it 
backed to the N.W. with force of 6 to 7. 
In the following table two tides are given at twenty-four hours’ 
interval on the 17th and 18th. 
Tides after the Gale of November 1893. 
F | 
a 2 Variation from Tide Table | Differen-e in | 
Poi a eaeee L. Height of | 
g Above | Below | two Tides 
ft. in ft. in | {t. in. ft. in 
A f 1s 8 0 10 | — O 4 
oe tilt ag % USTED HN RES, BERANE S: 
: : rs 
Sunderland . | a ee . a2 | “? dey 
: 29.9% zt | = 
P 19 2 -- hie, BeBe a) Nae] Bt 
Grimsby : { 25 0 3 3 jens a: 
Boston . ‘ ao 51 | a4 a ; 
BMarmouih +. =.) « 1 : 4 9 eos one 
Lowestoft : { “a win | ¥, . aa ‘ 
Sheerness : 3 3 -- | _ : 4 2 
Dockyard : : ie — — — 
Victoria and Albert { 24 5 — 2 0 3.9 
Dock l!| 28 2 ivy os = 
London Dock .. { oe = 17 es shi 
[ ee, —_ 1 5 3 
Dover . i} 15 0 OV 4 =. 2. 
Portsmouth . c - “a we : : pated 
Avonmouth. . . { a 4 ™ ; ah 
iiiverpool) . ai). { : i : yesh 1 8 ie 
Glasson Dock a { = a ac a 2 i) 
Belfast . : er ts { f: i Ble 2 8 hat 
f 9 = 
ee oe “| ie ; yall 110 Ae 
