PBESENT VAEIATION OE THE COMPASS. 
329 
Coasts of Ireland. 
Stations. 
Lat. N. 
Long. 
W. 
Date. 
Greenwich 
mean time of 
observation. 
Decimation, West. 
Observers. 
Ob- 
served. 
Secular 
change. 
Corrected. 
o / 
O / 
h m 
O / 
/ 
O / 
Belfast, near Abercorn Basin 
54 36 
5 55 
1869, July 16 
9 55 a.m. 
24 15 
22 
23 53 
Calver. 
Kingston, Harbour, North pier 
53 18 
6 7 
1871, Aug. 8 
3 30 p.m. 
23 31 
4 
23 27 
J. Richards. 
Arklow, Ovoca River (entrance) 
52 47 
6 9 
„ „ 5 
4 10 p.m. 
23 38 
8 
23 30 
„ 
Cahore Point 
52 34 
6 12 
„ July 26 
3 40 p.m. 
23 21 
5 
23 16 
» 
Wexford, South Bay, Carnsore cliff ... 
52 15 
6 20 
„ » 31 
6 50 a.m. 
23 17 
+8 
23 25 
„ 
Bereiiavf.n : 
Dinish Island, highest part 
51 39 
9 51 
1866, July 9 
6 35 p.m. 
26 09 
50 
25 19 1 o 
1 25 
16 
Moriarty, Staff 
Bere Island, Palmer Point 
51 39 
9 47 
,, „ 11 
5 50 a.m. 
25 59 
46 
25 13 J 
Captain, R.N. 
Valentia, Meteorological Observatory. 
51 55 
10 18 
186S,Oct.23-27 
A.M. & P.M. 
25 52 
31 
25 21 v 
L 25 
13 5 
Rev. T. Kerr. 
1871, Sept. -| 
25 13 
7 
25 6.1 
1 8-30 J 
Galway, on Green near Dock 
53 16 
9 3 
1869, May 26 
10 15 A.M. 
25 18 
25 
24 53-1 
> 24 
56 
Calver. 
,, June 9 
4 0 p.m. 
25 28 
29 
24 59 J 
Killibegs, Rough Point 
54 38 
8 26 
„ „ 23 
10 20 A.M. 
25 42 
26 
25 16 I 
1 25 
17 
„ „ 26 
7 20 P.M. 
25 41 
23 
25 18 J 
Annual change of Westerly Declination on coasts of United Kingdom between the 
Epochs 1842-5 and 1872 [29-5 years], obtained by comparison with Sir Edward 
Sabine’s Declination Map in Philosophical Transactions for 1870. 
Diff. 
Annual Mean 
decrease. value. 
Shetland Islands and N.E. 
Coasts of Scotland, be- 
tween 60th and 56th 
parallels. 
between 56th and 51st 
parallels. 
(^Lerwick 
. 1842-5 
1872-0 
27-201 
22-75 J 
. 4-45 = 9-06 
Wick 
. 1842-5 
1872-0 
27-40' 
23-50 
> 3-90 = 7-93 
Peterhead 
1842-5 
1872-0 
26-35] 
22-35 j 
> 4-00 = 8-14 
St. Abbs 
1 
. 1842-5 
1872-0 
25-85 ' 
22-00 
> 3-85 = 7-83 
pHoly Island 
. 1842-5 
1872-0 
25-50 
21-65 J 
3-85 = 7-83 
Flamboro’ Head .. 
. 1842-5 
1872-0 ...... 
24-20 
20-40 J 
3-80 = 7-73 
Cromer 
. 1842-5 
1872-0 
19*30 / 
North Foreland .. 
L 
. 1842-5 ...... 
1872-0 
22-65 
18-85 J 
3-80 = 7*73 
8-24 
> 7-78 
