14 
ME. GEORGE W. WALKER ON THE MAGNETIC RE-SURVEY OF THE 
Table I.—Decimation (continued). 
Station. 
No. 
Date. 
Declination 
observed. 
Greenwich 
value. 
Difference. 
Add 
15° 2'-8. 
Provisional 
value for 
epoch Jan. 
1, 1915. 
1915. 
/ 
o 
19 
O / 
Cork. 
171 
Aug. 
18 
19 
20 
6 
15 
1 
3 
4-4 
3 
— 
19 22-1 
Bantry. 
163 
>> 
19 
19 
35 
8 
14 
59 
3 
-1-4 
36 
5 
— 
19 39-3 
Valencia. 
195 
)) 
20 
20 
7 
3 
14 
58 
1 
+ 5 
9 
2 
— 
20 12-0 
Killarney. 
182 
J) 
26 
19 
55 
3 
15 
0 
6 
+ 4 
54 
7 
— 
19 57-5 
Tralee. 
194 
27 
20 
10 
7 
15 
2 
9 
+ 5 
7 
8 
— 
20 10-6 
Charleville .... 
167 
5) 
28 
19 
30 
1 
14 
56 
7 
-t-4 
33 
4 
— 
19 36-2 
Tipperary. 
193 
>> 
30 
19 
19 
8 
14 
59 
1 
-1-4 
20 
7 
— 
19 23-5 
Limerick. 
185 
31 
19 
49 
9 
15 
0 
4 
+ 4 
49 
5 
— 
19 52-3 
Kilrush. 
183 
Sept. 
1 
20 
6 
8 
14 
58 
3 
+ 5 
8 
5 
— 
20 11-3 
Lisdoonvarna . . . 
186 
)) 
2 
19 
55 
5 
14 
59 
6 
-1-4 
55 
9 
— 
19 58-7 
Gort. 
177 
3 
19 
46 
6 
14 
58 
8 
-t-4 
47 
8 
— 
19 50-6 
Parson stown. 
190 
)) 
4 
19 
27 
1 
15 
0 
0 
-1-4 
27 
1 
— 
19 29-9 
Kildare. 
180 
JJ 
6 
18 
56 
4 
14 
57 
4 
+ 3 
59 
0 
— 
19 1-8 
Athlone. 
158 
7 
19 
25 
1 
14 
59 
5 
4-4 
25 
6 
— 
19 28-4 
Galway. 
176 
n 
8 
20 
20 
1 
14 
57 
8 
4-5 
22 
3 
— 
20 25-1 
Oughterard .... 
189 
9 
20 
33 
4 
14 
58 
9 
4-5 
34 
5 
— 
20 37-3 
Clifden. 
168 
10 
20 
27 
7 
14 
58 
2 
+ 5 
29 
5 
— 
20 32-3 
Leenane . 
184 
n 
11 
20 
19 
7 
14 
58 
1 
4-5 
21 
6 
— 
20 24-4 ■ 
Westport. 
198 
5) 
13 
20 
9 
4 
14 
59 
4 
4-5 
10 
0 
— 
20 12-8 
Ballina. 
160 
14 
20 
10 
8 
14 
58 
3 
4-5 
12 
5 
— 
20 15-3 
Castlereagh .... 
165 
15 
20 
7 
8 
14 
58 
5 
+ 5 
9 
3 
— 
20 12-1 
Carrick-on-Shannon . 
164 
3) 
16 
19 
55 
4 
14 
58 
0 
4-4 
57 
4 
_ 
20 0-2 
Sligo. 
191 
3) 
17 
20 
5 
2 
15 
2 
2 
+ 5 
3 
0 
— 
20 5-8 
Enniskillen .... 
175 
33 
18 
19 
46 
6 
14 
56 
8 
4-4 
49 
8 
— 
19 52-6 
Donegal. 
172 
33 
20 
19 
37 
2 
14 
55 
2 
-44 
42 
0 
— 
19 44-8 
Strabane . 
192 
33 
21 
19 
44 
8 
14 
57 
2 
4-4 
47 
6 
— 
19 50-4 
Londonderry , . 
188 
53 
21 
19 
44 
0 
14 
58 
0 
4-4 
46 
0 
— 
19 48-8 
Coleraine. 
169 
33 
22 
19 
46 
8 
15 
0 
8 
4-4 
46 
0 
_ 
19 48-8 
Waterfoot .... 
196 
33 
23 
19 
19 
6 
15 
0 
0 
4-4 
19 
6 
— 
19 22-4 
Cookstown Junction . 
170 
33 
24 
17 
15 
4 
14 
58 
2 
4-2 
17 
2 
— 
17 20-0 
Bangor . 
162 
33 
28 
18 
30 
9 
14 
56 
7 
+ 3 
34 
2 
— 
18 37-0 
Armagh . 
157 
33 
29 
19 
9 
7 
14 
59 
'5 
4-4 
10 
2 
— 
19'13-0 
Greenore . 
178 
30 
19 
8 
0 
15 
0 
3 
4-4 
7 
7 
— 
19 10-5 
Cavan . 
166 
Oct. 
1 
19 
28 
8 
14 
58 
9 
4-4 
29 
9 
— 
19 32-7 
Kells . 
179 
33 
1 
19 
10 
6 
14 
55 
6 
4- 4 
15 
0 
— 
19 17-8 
Drogheda . 
173 
33 
2 
18 
52 
3 
14 
56 
7 
-43 
55 
6 
— 
18 58-4 
Holyhead. 
90 
35 
4 
17 
45 
5 
14 
56 
9 
-42 
48 
6 
— 
17 51-4 
Pwllheli. 
128 
6 
17 
30 
3 
14 
54 
7 
4-2 
35 
6 
— 
17 38-4 
Llandudno .... 
106 
8 
17 
43 
6 
14 
58 
6 
4-2 
45 
0 
. - 
17 47-8 
Llangollen .... 
107 
33 
9 
17 
2 
7 
14 
58 
2 
+ 2 
4 
5 
— 
17 7-3 
Birkenhead .... 
62 
11 
17 
0 
5 
15 
1 
0 
4-1 
59 
5 
— 
17 2-3 
Wheelock. 
152 
S3 
12 
16 
13 
7 
14 
55 
0 
+ 1 
18 
7 
— 
16 21-5 
Stoke-on-Trent . . . 
141 
13 
16 
14 
6 
14 
53 
6 
4-1 
21 
0 
— 
16 23-8 
Coalville . 
76 
13 
15 
27 
0 
14 
56 
3 
-40 
30 
7 
— 
15 33-5 
Leicester. 
104 
33 
14 
15 
29 
0 
14 
57 
8 
-40 
31 
2 
— 
15 34-0 
