MAGNETIC SURVEY OF GREAT BRITAIN. 



103 



Table XXXII. 



Mr Lloyd's Observations in Dublin in 1838. 

 Gambey's Needles.-Method of Arbitrary Azimuths. 



Needle. 

 Date. 







90 



10 



100 



20 



110 



30 

 120 



40 

 130 



50 

 140 



60 

 150 



70 

 160 



80 

 170 



0*f 





 90 

 30 



120 

 60 



150 



Angle. 



70 49'8 

 89 43-4 



71 41 

 86 42-2 

 71 540 

 83 33-0 

 73 11-4 

 80 27-4 

 75 0-9 

 77 40-2 

 77 20-4 

 75 17-9 

 80 1-0 

 73 280 

 83 4-4 

 72 6-4 

 86 16-5 

 71 14-8 





 90 

 30 



120 

 60 



150 



70 59-1 

 89 53-5 

 73 111 

 80 16-2 

 80 9-6 

 73 20-7 



70 55-9 

 89 51-2 

 73 16-1 

 80 22-0 

 80 16-0 

 73 26-7 



o 



180 

 270 

 190 

 280 

 200 

 290 

 210 

 300 

 220 

 310 

 230 

 320 

 240 

 330 

 250 

 340 

 260 

 350 



180 

 270 

 210 

 300 

 240 

 330 



180 

 270 

 210 

 300 

 240 

 330 



195 

 285 

 225 

 315 

 255 

 345 



Angle. 



7°0 56'0 

 89 49-4 

 71 11-6 

 86 37-2 

 71 59-1 

 83 21-9 

 73 19-4 

 80 13-9 

 75 4-0 

 77 32-4 

 77 240 

 75 11-1 

 80 8-6 

 73 20-0 

 83 8-5 

 71 59-1 

 86 23-0 

 71 71 



Mean Angle. 



71 1-9 

 89 52-3 

 73 19-5 

 80 110 

 80 16-9 

 73 171 



71 1-7 



89 530 

 73 29-1 

 80 6-8 

 80 24-9 

 73 19-5 



71 32-6 

 85 13-4 



75 59-4 



76 30-4 

 84 31-1 

 71 38-1 



70 52-9 

 89 46-4 



71 7-8 

 86 39-7 

 71 56-5 

 83 27-5 

 73 15-4 

 80 20-6 

 75 2-5 

 77 30-3 

 77 22-2 

 75 14-5 

 80 4-8 

 73 24-0 

 83 6-5 

 72 2-8 

 86 19-8 

 71 110 



Dip. 



71 0-5 

 89 52-9 

 73 15-3 

 80 13-6 

 80 13-3 

 73 18-9 



70 58-8 



89 5 



73 22-6 



80 



80 20-5 \ 



73 231 / 



58-8 -1 

 52-1 / 

 22-6 1 

 14-4 J 



70 52-8 

 70 52-6 

 70 560 

 70 56-0 

 70 551 

 70 55-3 

 70 560 

 70 55-4 



70 52-6 



71 0-5 

 70 52-7 

 70 55-6 



71 29-3 "1 

 85 16-4 J 



75 56-6 \ 



76 32-0 J 

 84 29-7 1 

 71 42-4 J 



70 58-8 



70 59-3 



71 2-5 



70 58-3 

 70 53-5 

 70 59-9 



* The Azimuth O' is the magnetic meridian, the face of the instrument being to 

 the east. The azimuths increase in the order N., t.., h., VV. „„„,,„r of dc- 



t The azimuths in this last observ..tion are set down in a round number ot 

 grees. They were (exactly) 14° 15', 44° 15', 74° 15', &c. 



