272 Mr Harher, Magnetic Disturbances in the Isle of Skye. 



pointing nearly S.E., while at or near the same spot I found the 

 declination nearly normal or with a very slight negative de- 

 viation 1 . It appears then that a magnetic disturbance of the 

 first order (due perhaps to a lightning-stroke) once existed at this 

 spot, but has since died out. As regards the centres of violent 

 local disturbance on the steep slope, it is only possible to say that 

 the older diagram, like my own, shows some highly anomalous 

 declinations in this part ; but the rapid changes from point to 

 point which are always found near such spots make any close 

 comparison impossible. 



The next example is of a somewhat different kind, and is 

 selected with the view of examining the probable relation between 

 disturbances of the second order and those of the first. It is a 

 prominent ridge on the hill named Meall an Fhuarain, about half- 

 way between Sligachan and Portree and a mile west of the high- 

 road 2 . The ridge rises abruptly about 60 feet above the fairly 



YARDS. 



+$m f It 



i 



Fig. 2. Enlarged ground-plan of a small area at the summit C in Plate XII. 

 Three north poles and four south poles are indicated by the behaviour of the 

 compass needle. 



level moorland immediately surrounding it, and runs in a straight 

 line for about 160 yards with a width of about 30 yards. Like all 



1 These and some other observations made merely for comparison with the 

 earlier ones are not included in the summarised account, because they could not 

 conveniently be brought within the limits of the diagram. They are quite in accord 

 with the general result as summarised. 



2 It is a station of the Trigonometrical Survey, marked 952-7 on the Ordnance 

 Survey map, and is a conspicuous object directly in front of anyone approaching by 

 road from Sligachan. 



