82 
MR. A. W. RtrCKER AND DR. T. B. THORPE ON A IVIAGNETIC 
Table II.—Mean Annual Decrease of Inclination between 1837 and 1886. 
Station. 
Mean Annual 
Decrease. 
Station. 
Mean Annual 
Decrease. 
Lerwick . 
1-22 
Malvern. 
2-33 
Aberdeen. 
1-58 
Brecon. 
2-24 i 
Kirkwall. 
141 
Aberystwith .... 
2-27 j 
Wick. 
1-47 
Harwich. 
2'02 ! 
Golspie. 
1-48 
Cliftoir. 
2'25 
Inverness. 
1-57 
Swansea. 
2-22 
Fort AuOTistiis..... 
1-44 
1 
Kew. 
2'04 1 
Edinburgh. 
1-43 
Ilfracombe. 
2*04 
Glasgow. 
1-53 
Salisbury. 
2-28 
Helensburgh .... 
1-S8 
Dover. 
2-10 1 
Campbelton .... 
1-70 
Exeter. 
2-06 
Gumbrae. 
1-23 
Ryde. 
2-26 
Berwick. 
1-77 
Weymouth. 
2-32 
Plymouth. 
2-26 
Alnwick. 
1-67 
Falmouth. 
2-46 
Newcastle. 
1-75 
Carlisle. 
1-96 
Londonderry .... 
2-04 
Whitehaven .... 
1-77 
Strabane . 
1-87 
Thirsk. 
1-88 
Bangor*. 
1-98 
Scarborough .... 
1-80 
Armagh. 
2-09 
Manchester'. 
2T0 
Enniskillen. 
2-04 
Birkenhead .... 
1-98 
Ballina. 
2-06 
Holyhead. 
2-02 
Westport. 
212 
Clifden. 
213 
Cromer. 
1-81 
King’s Lynn .... 
1-96 
Galway. 
1-99 
Nottingham .... 
2-06 
Dublin. 
2*06 
Pwllheli. 
2-04 
Limerick. 
2-21 
Shrewsbury 
1-70 
W aterford. 
2-31 
Birmingham ... 
2-10 
Killarney. 
2-45 
Cambridge. 
2'02 
Cork. 
2-32 
Lowestoft. 
1-84 
Valentia. 
2-50 
There is a steady increase as we pass from north to south, and from east to west. 
This is brought out in the next table, in which the mean decrease is given for each 
district, and also for the stations in the easterly and westerly parts of it. 
District. 
Number of 
Stations. 
Mean annual decrease of inclination between 
1837-1886 for 
Whole district. 
Westei'u half. 
Eastern half. 
North of Scotland. 
7 
1-45 
1-49 
1-42 
South of Scotland. 
b 
1-51 
North of England and North Wales . 
9 
1-88 
1-97 
1*77 
Midlands and Wales. 
14 
2-05 
2*10 
2-00 
South of Eirgland. 
9 
2-20 
2-24 
2-17 
North of Ireland. 
8 
2-04 
2-07 
1-98 
South of Ireland. 
7 
2-26 
2-37 
215 
