The Bakerian Lecture: A Magnetic Survey of the British Isles for the Epoch January 1, 1886 . Scotch. Coal-field District. Vertical Force disturbances are — 0188 and — *0092 ; at Glasgow and Carstairs— 0080 and -~*0079 ; and at Ayr and Hawick — *0145 and —0099. The two centralstations which are nearest to the ridge line have algebraically the largest values. The convergence of the Horizontal disturbing Forces towards the ridge line isunmistakeable. The isogonals (Plate V.) give evidence of a subsidiary centre ofattraction near Lochgoilhead. 304 MR. A. W. RUCKER AND DR. T E. THORPE ON A MAGNETIC
The Bakerian Lecture: A Magnetic Survey of the British Isles for the Epoch January 1, 1886 . Scotch. Coal-field District. Vertical Force disturbances are — 0188 and — *0092 ; at Glasgow and Carstairs— 0080 and -~*0079 ; and at Ayr and Hawick — *0145 and —0099. The two centralstations which are nearest to the ridge line have algebraically the largest values. The convergence of the Horizontal disturbing Forces towards the ridge line isunmistakeable. The isogonals (Plate V.) give evidence of a subsidiary centre ofattraction near Lochgoilhead. 304 MR. A. W. RUCKER AND DR. T E. THORPE ON A MAGNETIC North- Western England, North Wales, and Galloivay. The stations in this group are bounded on the west by the northern part of theIrish Sea. They are few in number, and so large a portion of the intervening spacesis covered with water that we cannot hope to unravel the intricacies of the district. Fig, North-West England, North Wales, and Galloway. The valley line which bounds it on the east has been drawn through the centre ofthe region of low Vertical Force which exists there (see Plate XI). The southernpart is obtained from the Horizontal Force disturbances (see Plate X.). SURVEY OF THE BRITISH ISLES FOR THE EPOCH JANUARY 1, 1886. 305 At Dumfries and Carlisle the disturbing forces are small, and coincide in directionwith the valley line, , they fairly represent the resultants of two attractionsexerted on each side of it. At Stranraer, and in the Isle of Man, our disturbingHorizontal Forces act towards the south, and this result is confirmed by those Eig. 28.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectproceed, bookyear1890
