The Bakerian Lecture: A Magnetic Survey of the British Isles for the Epoch January 1, 1886 . Disturbance map of Scotland, from Mr. Welshs survey, 1857-58, SURVEY OF THE BRITISH ISLES FOR THE EPOCH JANUARY 1, 1886. 299 There are a few discrepancies in the direction of the Horizontal Forces, but thegeneral agreement and occasional differences will be better discussed when we deal, aswe are now about to do, with separate districts. We propose to treat of the resultsof the two surveys simultaneously, and we think we shall succeed in showing that,although it would have been impossible to draw our c
The Bakerian Lecture: A Magnetic Survey of the British Isles for the Epoch January 1, 1886 . Disturbance map of Scotland, from Mr. Welshs survey, 1857-58, SURVEY OF THE BRITISH ISLES FOR THE EPOCH JANUARY 1, 1886. 299 There are a few discrepancies in the direction of the Horizontal Forces, but thegeneral agreement and occasional differences will be better discussed when we deal, aswe are now about to do, with separate districts. We propose to treat of the resultsof the two surveys simultaneously, and we think we shall succeed in showing that,although it would have been impossible to draw our conclusions from. Mr. Welshsless numerous stations, they are strongly confirmed by the deductions which we havemade from his survey. Fig. 24#. Highland District. The Highland District, In fig. 24 we have collected all the information which the isomagnetics in Plates V*to VIII. afford of this district, Those places only are named to which we actually the more westerly of two stations has the smaller Declination, the isogonals are 2 Q 2 300 MR. A. W. RtJCKER AND DR. T. E. THORPE ON A MAGNETIC distorted (Plate V.), and indicate a centre of attraction between the two. AJ1 suchpoints are marked D. Loops in the Vertical Force isomagnetics indicate maxima and minima of VerticalForce, which are marked Fand v respectively. As no observations could be made tothe west of the islands in the south-west of Scotland, it is impossible to prove formallythat the Vertical Forces in this district are maxima. The values at Scarnish andIona are, however, the same as those at Wick and Golspie respectively, which arenearly two degrees farther north. We have, therefore, felt j ustified in marking themas maxima, thereby indicating that th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectproceed, bookyear1890
