MAGNKTICAL OBSERVATIONS IN SCOTLAND. 



99 



following table have therefore been diminished 12' from the ori- 

 ginal observations. 



Table I. 

 Observations of Dip, Needle S (2). 



Dublin 

 Helensburgh . 

 Gt. Cuinbray 

 Loch Ridan . 

 Loch Gilpliead 

 Castle Duart... 

 Tobermoric .. 

 LochScavig .. 

 Loch Slapin ... 



53 21 

 56 

 55 48 



55 57 



56 04 

 56 31 



56 38 



57 14 

 57 14 



Artornish 56 33 



56 39 

 7 08 



57 27 

 57 58 



7 27 

 57 37 

 57 20 

 57 13 

 57 01 

 56 36 

 56 25 

 56 07 

 55 35 

 55 34 

 55 57 



55 51 



56 

 55 42 

 55 23 



Glencoe 



Fort Augustus 



Inverness 



Golspie 



Inverness 



Gordon Castle 



Rhynie 



Alford 



Braemar 



Blairgowrie ... 



Newport 



Kirkaldy 



Melrose 



Dryburgh 



Edinburgh ... 



Glasgow 



Helensburgh... 

 Loch Ranza... 

 Campbeltown . 



Stranraer [54 55 



Bangor 54 40 



Dublin 53 21 



Long. 



6 15 

 4 41 



4 50 



5 10 

 5 28 



5 45 



6 01 

 6 07 

 6 02 

 5 48 

 5 07 

 4 40 

 4 11 



3 57 



4 11 

 3 09 

 2 50 



2 45 



3 25 

 3 18 



2 55 



3 09 

 2 44 



2 39 



3 11 



4 14 



4 41 



5 17 

 5 38 



4 59 



5 40 



6 15 



July 22, 23, 

 July 28. 

 July 30. 

 Aug. 5. 

 Aug. 7. 

 Aug. 9. 

 Aug. 10. 

 Aug. 12. 

 Aug. 1*. 

 Aug. 16. 

 Aug. 17. 

 Aug. 19. 

 Aug. 20. 

 Aug. 23. 

 Aug. 24. 

 Aug. 25. 

 Aug. 26. 

 Aug.27&29, 

 Aug. 30. 

 Aug. 31. 

 Sept. 1. 

 Sept. 3. 

 Sept. 6. 

 Sept. 7. 

 Sept. 8. 

 Sept. 9. 

 Sept. 13. 

 Sept. 16. 

 Sept. 16. 

 Sept. 18. 

 Sept. 21. 

 Oct. 4 . 



No. of I 

 Head- 

 ings. 



Dip. 



72 08-5 

 71 34-45 

 71 31-2 

 71 47-9 



71 59-2 



72 12-6 

 72 20-45 

 71 53-5 

 71 40-93 

 71 36-7 

 71 007 



Place of Observation. 



Provost's Garden, Trinity College. 



Seabeach. 



NE. end of the Island. 



Eastern side of the Loch. 



Wood near the Canal. 



Grounds of Castle Duart. 



Seabeach S. of the Town. 



Near the entrance of Loch Coruisk. 



E. side of the inner Loch. 



Limestone Point S. ot the Castle. 



Grove near the Village. 



Field near the Canal. 



Grounds of Abertorf. 



Wood near the Inn. 



Grounds of Abertorf. 



Grounds of the Castle. 



Field near the Inn. 



By the River in front of the Manse. 



Field near the Inn. 



Field N. of the Town. 



Field inland of the Village. 



Mr. Fergus's Garden, 



Riverside, E. of the Abbey. 



Tweed side. 



Botanic Garden. 



Botanic Garden. 



Field East of the Town. 



East side of the Loch. 



S. side of the Harbour. 



Seabeach E. side of the Loch. 



Grounds of tlie Castle. 



Provost's Garden, Trinity College. 



The latitudes and longitudes are taken from the map of Scot- 

 land published by the Society for Diffusing Useful Knowledge. 



The stations and dips enumerated in the preceding table re- 

 quire to be combined, according to the method exemplified in 

 the Irish Magnetical Report, in order to determine the angle 

 which the isoclinal lines in Scotland make with the meridian ; 

 and the distance apart of the isoclinal lines which correspond to 

 certain differences of dip. For this purpose some one station 

 may be selected as the origin of the coordinates of distance of 

 the other stations ; and at that station the dip should be as- 

 certained with all possible accuracy. In the progress of the 

 observations, I had occasion frequently to remark the disturb- 

 ance in the direction of the needle caused by the vicinity of rocks 

 of igneous origin. Rocks of this nature are so extensively and 

 generally diffused throughout Scotland, as to make it doubtful 

 whether any station could be selected, which might be confidently 

 assumed to be entirely free from local disturbance of this na- 



h2 



