18 
MR. GEORGE W. WALKER ON THE MAGNETIC RE-SURVEY OF THE 
Table II. — Horizontal Force (continued). 
Station. 
1 
No. 
Date. 
Horizontal 
Force 
observed. 
Greenwich 
value. 
Differ¬ 
ence. 
Add 
18,505. 
Provisional 
value for 
epoch Jan. 
1, 1915. 
Moment 
of 
magnet 
at 0° C.i 
Cork. 
171 
1915. 
Aug. 18 
17,916 
18,498 
- 582 
17,923 
757 • 4 
Bantry. 
163 
„ 19 
! 17,994 
18,482 
- 488 
— 
18,017 
757-6 
Valencia .... 
195 
20 
17,903 
18,497 
- 594 
17,911 
758-4 
Killarney .... 
182 
26 
,, 
17,879 
18,476 
597 
17,908 
757 - 7 
Tralee. 
194 
„ 27 
17,699 
18,492 
- 793 
— 
17,712 
757 - 8 
Charleville. 
167 
„ 28 
17,701 
18,501 
- 800 
— 
17,705 
757-4 
Tipperary .... 
193 
„ 30 
17,695 
18,476 
- 781 
— 
17,724 
758-3 
Limerick .... 
185 
„ 31 
17,658 
18,503 
- 845 
17,660 
757-5 
Kilrush. 
183 
Sept. 1 
17,543 
18,499 
- 956 
_ 
17,549 
758-1 
, Lisdoonvarna. . . 
186 
0 
17,479 
18,498 
- 1019 
— 
17,486 
758-3 
' Gort. 
177 
„ 3 
17,445 
18,501 
-1056 
_ 
17,449 
756-9 
Parsonstown . . . 
190 
„ 4 
17,410 
18,493 
- 1083 
— 
17,422 
757-6 
Kildare. 
180 
„ 6 
17,505 
18,495 
- 990 
— 
17,515 
758-2 
Athlone .... 
158 
» 7 
17,295 
18,496 
- 1201 
— 
17,304 
757-0 
Galway. 
176 
„ 8 
17,305 
18,490 
- 1185 
— 
17,320 
757-9 
Oughterard . . . 
189 
„ 9 
17,171 
18,499 
- 1328 
— 
17,177 
757-6 
Clifden. 
168 
„ 10 
17,064 
18,492 
- 1428 
17,077 
757 - 3 
Leenore .... 
184 
„ 11 
16,973 
18,492 
- 1519 
16,986 
757-5 
Westport .... 
198 
„ 13 
16,921 
18,505 
-1684 
— 
16,921 
757-9- 
Ballina. 
160 
» 14 
16,728 
18,489 
- 1761 
— 
16,744 
757-4 
Castlereagh 
165 
„ 15 
17,100 
18,485 
- 1385 
— 
17,120 
757-5 
Carrick-on-Shannon. 
164 
„ 16 
17,115 
18,490 
- 1375 
_ 
17,130 
757-1 
Sligo. 
191 
„ 17 
16,798 
18,474 
- 1676 
— 
16,829 
757-6 
Enniskillen 
175 
„ 18 
16,864 
18,482 
- 1618 
— 
16,887 
757-3 
Donegal. 
172 
„ 20 
16,919 
18,476 
-1557 
— 
16,948 
758-2 
Strabane .... 
192 
21 
16,772 
18,488 
-1716 
— 
16,789 
757-9 
Londonderry . . . 
188 
„ 21 
16,720 
18,4 95 
- 1775 
— 
16,730 
757-3 
Coleraine .... 
169 
22 
17,112 
18,479 
- 1367 
— 
17,138 
757-2 
Waterfoot .... 
196 
„ 23 
16,719 
18,469 
- 1750 
— 
16,755 
757-2 
Cookstown Junction 
170 
24 
16,889 
18,168 
- 1579 
— 
16,926 
757-9 
Bangor . 
162 
„ 28 
16,934 
18,470 
- 1536 
— 
16,969 
758-2 
Armagh .... 
157 
29 
16,999 
18,476 
- 1477 
— 
17,028 
758-0 
Greenore .... 
178 
„ 30 
17,181 
18,466 
- 1285 
— 
17,220 ' 
758-4 
Cavan . 
166 
Oct. 1 
16,995 
18,479 
- 1484 
— 
17,021 
757-7 ■ 
Kells. 
179 
„ 1 
17,317 
18,495 
- 1178 
— 
17,327 
757-5 
Drogheda .... 
173 
0 
17,260* 
18,488 
- 1228 
— 
17,277 
— 
Holyhead .... 
90 
17,363 
18,509 
- 1146 
— 
17,359 
757-9 
Pwllheli .... 
128 
„ 6 
17,810 
18,502 
- 692 
— 
17,813 1 
757 - 7 
Llandudno. . . . 
106 
„ 8 
17,446* 
18,501 
- 1055 
— 
17,450 
— 
Llangollen.... 
107 
„ 9 
17,721 
18,505 
- 784 
-- 
17,721 
757-7 
Birkenhead . . . 
62 
„ 11 
17,476* 
18,474 
- 998 
— 
17,507 
— 
Wheelock .... 
. 152 
12 
j) j- -j 
17,670 
18,490 
- 820 
— 
17,685 
757 - 9 
Stoke-on-Trent . . 
141 
„ 13 
17,739* 
18,488 
- 749 
— 
17,756 
— 
Coalville .... 
76 
„ 13 
17,944* 
18,506 
- 562 
-- 
17,943 
— 
Leicester .... 
104 
„ 14 
17,944 
18,482 
- 538 
— 
17,967 
757-5 
