552 
MR. A. W. RtiCKER AND DR. T. E. THORPE ON A MAGNETIC 
Longitudes of the points of intersection with given lines of Latitude of the Isogonals 
deduced respectively from the 1891 Survey and from the mean of the 1886 and 
1891 Surveys. 
Latitude. 
23“ 
22° 
21° 
20° 19° ! 18° 
1 ! 
17° 
58°-5 
6 28 
6 30 
O / 
4 5S 
4 59 
3 28 
3 28 
1 58 
1 57 
0 / 
O / 
O / 
57°-5 
7 5 
7 6 
5 31 
5 32 
3 57 
3 57 
2 23 
2 22 
56°'5 
7 41 
7 42 
6 4 
6 4 
4 26 
4 26 
2 48 
2 47 
55°-5 
• 8 18 
8 20 
6 36 
6 37 
4 54 
4 55 
3 12 
3 12 
1 30 
1 29 
54°*5 
8 69 
9 0 
7 12 
7 13 
5 26 
5 26 
3 39 
3 38 
1 52 
1 51 
0 6 W 
0 3 W 
j 
9 45 
9 47 
7 53 
7 55 
6 2 
6 2 
4 11 
4 10 
2 19 
2 17 
0 27 
0 25 
52°-5 
8 41 
8 44 
6 45 
6 46 
4 50 
4 49 
2 53 
2 51 
0 55 
0 52 
1 4E 1 
1 6 E j 
i 
5r-5 
9 35 
9 41 
7 35 
7 36 
5 34 
5 34 
3 31 
3 30 
1 27 
1 25 
1 
0 38 E 
0 41 E 1 
1 
i 
4 15 
4 14 
2 3 
2 2 
1 
0 10 E 
0 10 E 
