328 
MAGNETIC SURVEY OF THE BRITISH ISLES. 
Page. 
Kew as Base-station.57 
„ Annual Variation at.81 
„ Observations at.160 
King’s Lynn, Centre of Attraction near . . 287 
Knott, Dr., Survey of Japan..318 
Least Scpiares, Results obtained by . . . 235 
Leicestershire District, Special Survey of . 288 
Local Disturbances Defined.233 
,, Magnetic Forces, Causes of ... . 314 
Loch Aylort, Disturbances at.268 
Magnetic and Geological Constitution of 
Districts, Relation between.311 
Magnetoinetei’, Alterations in.56 
Malvei'n Hills, Special Survey of ... . 274 
Map, Magnetic, of United Kingdom . . . 310 
Melton Mowbray, Disturbances at ... 288 
iMiri’or, Adjustments of.64 
Moureaux, M., Survey of France .... 62 
,, Isogonals for English Channel 241 
„ Isoclinals ,, ,, 246 
Naumann, Dr., on the Causes of Local and 
Regional Magnetic Forces 314 
on Isogonals near the Fossa 
Magna.261 
N.W. England, N. Wales, and Galloway . 304 
Oban, Disturbances at.268 
Observations, Number of.63 
,, Method of Taking .... 63 
P., Value of. 71 
“Peaks”.265 
Port Askaig, Disturbances at.268 
Reading, Focus near.282 
Regional Disturbances Defined.233 
,, Magnetic Forces, Causes of . . . 314 
Results of Observations, Method of Tabu¬ 
lating .93 
“Ridge” Lines.265 
Rijckevorsel, Dr. van. Survey of Indian 
Archipelago.235 
Page. 
I Rucker and Thorpe “ On Magnetic Iri’egu- 
larities,” &c.55 
Sabine, Sir E., Magnetic Survey, &c. ... 55 
,, Secular Change in Declination 89 
Scotch Coal-field District, Disturbances in . 302 
Scotland, Results at Stations .... 95-133 
,, Disturbance Map of, from Welsh’s 
Smwey.298 
Secular Corrections.81 
,, Change, Declination.89 
; ,, ,, Hoi’izontal Force ... 92 
,, ,, Inclination.82 
Southern District, Disturbances in . . . 308 
Spalding, Centre of Attraction near . . . 287 
Stations, Selection of.62 
Stewart, Balfour, on Welsh’s Results . . 300 
Stornoway, Disturbances at.268 
Stranraer, Comparison of Instruments at . 61 
,, Disturbances at.269 
Summary of Results at Stations . . 251-258 
Supplementary Stations for Secular Change 
in Dip .... 84 
,, ,, Results at . . . 258 
Surveys, Earlier, referred to.55 
Tabulation of Observations.69 
Terrestrial and True Isomagnetics . . . 233 
“Valley” Line.265 
Variation, Diurnal.64 
Vertical Forces, Disturbances in ... . 266 
Wash, The, Special Survey of Neighboui’- 
hood of.286 
W ELSH, Mr., Magnetic Survey by ... . 55 
., Results used for Secular Change 84 
Welsh’s, Mr., Survey, Comparison with, of 
Disturbances in Declination 293 
„ Survey, Disturbing Forces . 297 
Whipple, Mr., on Sabine’s Observations . . 320 
Worcestershire Beacon as an Attracting 
Centre.275 
