OBSERVATIONS ON THE DIP OF THE MAGNETIC NEEDLE, BY COMMANDER J. ROSS, 
From the PHILOSOPHICAL TRANSACTIONS, Pari I. for 1834. 
Time 
Poles of the Needle direct. 
Poles of the Needle reversed. 
Observed 
Date. 
of the 
Axis direct. 
Axis reversed. 
Remarks. 
day. 
Mean. 
Dip. 
Face East. 
Face West. 
Face West. 
Face East. 
Face East. 
Face West. 
Face West. 
Face East 
1831. 
o 
o * 
B 
§ 
O 
§ 
o 
26-17 
o 
o , 
° / 
O / 
88 56-47 
Feb. 
15. 
Noon. 
78 11-5 
99 34-73 
78 6-23 
99 
25-67 
88 
49-53 
79 
98 
37-67 
79 17-33 
98 52-5 
89 3-42 
28. 
1 P.M. 
81 30 
98 38-78 
79 35-60 
98 
14-50 
89 
29-72 
72 
7-86 
103 
38-44 
72 52 
105 43-75 
88 35-51 
89 2-61 
March 
1. 
2 P.M. 
81 42-8 
97 52 
81 7 
96 
49-4 
89 
22-80 
77 
16 
100 
27 
77 47-42 
98 49-6 
88 35-0 
88 58-90 
4. 
81 348 
96 37-4 
81 18 
97 
25 
89 
13-8 
76 
30-4 
101 
10 
78 15-6 
99 27 
88 51-25 
89 2-52 
Mean observed dip at Sheriff’s Bay in lat. 70° T N., 
15. 
81 34-7 
96 34-5 
81 34-2 
96 
41-2 
89 
6-15 
75 
27-5 
102 
12-3 
75 6-9 
102 59-5 
88 56-55 
89 1-35 
21. 
4 P.M. 
75 5-67 
103 6-17 
74 12-83 
101 
8-33 
88 
23-14 
81 
14-5 
97 
6 
81 56-1 
95 35-3 
88 57-97 
88 40-56 
and long. 91° 54' W. Variation 96° 12--3" W. 
22. 
4 P.M. 
86 7-63 
91 30-17 
87 00 
90 
29 
88 
47-7 
86 
13 
92 
35-7 
87 19-83 
90 37-83 
89 11-59 
88 59-15 
previous to my journey towards the magnetic 
23. 
3 P.M. 
86 18-2 
91 11-35 
87 9-14 
90 
47 
88 
51-42 
86 
24-17 
90 
17 
87 28 
91 22 
88 47-29 
88 49-36 
pole —88° 57--04" N. (1831.) 
24. 
2 P.M. 
81 56-5 
96 18-7 
81 49-7 
96 
0-20 
89 
1-27 
81 
57-70 
95 
40-1 
81 18 
97 20-2 
89 4-0 
89 2-64 
25. 
3 P.M. 
78 56 
98 30 
78 1-1 
99 
27-5 
88 
43 65 
79 
51-4 
99 
12-17 
80 8-72 
97 21-4 
89 8-42 
88 56-04 
30. 
3 P.M. 
77 41 
99 49-25 
77 38-75 
99 
44-44 
88 
43-36 
81 
23 9 
96 
58-3 
81 59-4 
96 26-4 
89 12-0 
88 57-68 
April 
1. 
2 P.M. 
76 47-1 
100 2-90 
78 29 
100 
14-20 
88 
53-27 
81 
52-4 
95 
48-14 
81 27-12 
97 13-4 
89 5-27 
88 59-27 
4 P.M. 
78 40-67 
99 2-17 
78 36-33 
98 
52 
88 
48-04 
80 
8-27 
97 
5113 
80 20-27 
97 48-5 
89 2-04 
88 55-04 . 
May 
28. 
8 A.M. 
86 31-7 
92 47 
86 26-83 
93 
30 
89 
48-87 
73 
9-5 
106 
11-5 
84 20 
94 35-8 
89 34-2 
89 41-53 
i 89° 4I'-9" N. Variation 57° 15'W.; lat. 69° 34'45" 
2 P.M. 
86 17-22 
92 51 3 
87 2-14 
93 
32-16 
89 
55-71 
74 
42-2 
104 
58-22 
83 24-7 
94 50-18 
89 28-83 
89 42-27 
3 N.; long. 94° 53' W. 
/ 89°58'-ll" N. Assumed direction of meridian S. 75° 
June 
1. 
Noon. 
86 23 67 
93 8-33 
87 6-17 
93 
32-83 
90 
2-75 
73 
53-67 
104 
51-67 
83 44-33 
97 7.5 
89 54-29 
89 58-52 
3 P.M. 
85 55-5 
93 32-62 
86 40-67 
93 
54 
90 
0-71 
73 
22 
105 
24-83 
83 23-33 
67 28-67 
89 54-71 
89 57-71 
( W. (True.) 
) 89° 59'-46" N. Assumed direction of meridian N. 
5 P.M. 
86 32-33 
93 10-33 
87 16-67 
93 
9-83 
90 
1-79 
74 
58-83 
104 
16-83 
83 0-83 
97 5-13 
89 50-15 
89 55-97 
7 P.M. 
86 52-83 
93 9-67 
87 14-50 
93 
32-0 
90 
12-25 
74 
55 
104 
24-5 
83 38-17 
96 37 
89 53-67 
90 2-96 
\ 60° W.; lat. 70° 5' 17" N.; long. 96° 45'48" W. 
2. 
9 A.M. 
84 24-33 
96 12-67 
82 46-37 
96 
55-1 
90 
4-62 
82 
29-5 
97 
14-33 
85 14-5 
94 58-33 
89 59-14 
90 1-88 
^ 89°59'N. Assumed direction of meridian N. 15° W. 
11 A.M. 
84 3 
96 25-56 
82 32-60 
96 
35-75 
89 
54-08 
82 
36-5 
97 
26-75 
85 20-67 
94 29-0 
89 58-17 
89 56-12 
6. 
8 A.M. 
86 0-5 
92 15-83 
86 58-33 
93 
6-67 
89 
42-38 
75 
25-67 
103 
55-83 
82 40-17 
96 28-5 
89 37-54 
89 40-19 
Same position as on the 28th of May. 
8. 
9 A.M. 
86 27-5 
92 3-33 
87 13-67 
92 
17-83 
89 
30-58 
75 
20 
101 
36-17 
81 22-33 
98 37-83 
89 14-04 
89 22-33 
At Cape Isabella. Lat. 69° 26'20"; long. 93° 51'fcW. 
0. 
8 A.M. 
84 42-83 
94 33-13 
84 25-67 
93 
42-5 
89 
21-03 
77 
48-83 
100 
1 
81 42 
97 21-5 
89 13-33 
89 17-18 
At Padleak. Lat. 69o30' 1"; long. 93° 27' 52'' W. 
17. 
2 P.M. 
86 5 
92 40-2 
87 41-5 
91 
52-5 
89 
34-8 
82 
41 
93 
30 
85 1-3 
93 2-3 
88 33-65 
89 4-22 ' 
July 
13. 
5 P.M. 
2 P.M. 
86 9-8 
85 43-33 
91 48-5 
92 4-5 
87 45 
87 50-33 
91 
91 
15 
42 
89 
89 
14-57 
20-40 
80 
82 
45 
23 
96 
95 
30-8 
1-5 
85 9 2 
82 37 
93 7 
95 14-83 
88 53 
88 49-04 
89 3-79 
89 4-74 
Observed dip at Sheriff’s Bay on my return from the 
magnetic pole 89° 3'-22" N. (1831.) 
Aug. 
1.2. 
1 P.M. 
86 27-5 
91 41-7 
87 57-5 
91 
14-7 
89 
20-35 
84 
9-2 
93 
24-2 
79 45-8 
97 38-3 
88 44-37 
89 2-36 
20. 
Noon. 
80 3-34 
98 7-5 
80 46-7 
97 
20-8 
89 
4-53 
76 
15-7 
101 
30 
99 53-2 
78 15 
88 58-47 
89 1-50 
Oct 
21.| 
10 A. M. 
84 40-17 
93 52 
84 24 
93 
33-45 
89 
7-40 
79 
1-89 
98 
5-67 
81 36-67 
96 5 
88 42-31 
88 54-86 ' 
22. 
I 9 A.M. 
84 40-5 
94 16-5 
84 50-12 
93 
49-37 
89 
24-12 
77 
29-4 
99 
41 
80 24-5 
96 45-2 
88 35-03 
88 59-57 
23. 
Noon. 
84 9 
93 13-9 
84 40-6 
93 
43-2 
88 
56-67 
78 
55-4 
99 
5-9 
81 57-6 
95 32-8 
88 53-93 
88 55-30 
Nov. 
21. 
Noon. 
84 18-8 
94 8-1 
84 18-1 
94 
27-9 
89 
17-98 
77 
20-5 
99 
22 
78 41-8 
98 5-6 
88 22-47 
88 50-22 
22. 
1 P.M. 
84 56-2 
93 46-6 
84 54-6 
93 
48-6 
89 
21-5 
78 
55-3 
98 
24 
79 28-3 
96 51 
88 24 68 
88 53-07 
23. 
1 P.M. 
84 43 
93 37-6 
84 59 
93 
24-4 
89 
11 
79 
39-8 
98 
8 
80 36-2 
95 55-4 
88 34-85 
88 52-92 
Dec. 
24. 
10 A.M. 
84 42-9 
93 50-7 
84 11-7 
94 
32-6 
89 
16-97 
79 
47-5 
98 
31 
81 51-5 
94 46 
88 44 
89 0-49 
Observed dip at Victory Harbour 88° 54'-86'' N. 
Variation 101° 32' 03'' W. ; lat. 70° 9' 18" N.; 
1832. 
1 P.M. 
85 21-5 
93 2 
84 19-8 
93 
57 
89 
10-07 
79 
58-6 
98 
16-8 
81 37 
94 41-5 
88 38-48 
88 54-27 
Jan. 
21. 
| Noon. 
85 1 
94 8-6 
84 24-5 
94 
23-2 
89 
29-32 
76 
53 
100 
16-2 
81 7 
95 59-4 
88 33-9 
89 1-61 
long. 91° 30' 33" W. 
Feb. 
16. 
1 1 P.M. 
84 58-5 
95 11-8 
83 17-3 
95 
14 
89 
40-04 
76 
46-1 
100 
52 
79 51-7 
96 31 1 
88 30-22 
89 5-31 
18. 
1 P.M. 
83 48-4 
95 18-6 
81 58-1 
95 
19-7 
89 
6-2 
77 
30-1 
100 
39-5 
81 30-4 
95 37-8 
88 49-45 
88 57-82 
March 
17. 
3 P.M. 
83 16-2 
94 41-6 
82 32 
95 
421 
89 
2-98 
74 
53-9 
102 
45-2 
78 55 
96 3.1 
88 9-3 
88 36-14 
27. 
2 P.M. 
83 30-7 
94 48-4 
84 2-9 
94 
38-4 
89 
15-1 
74 
4-5 
102 
54-7 
78 28 
98 45-6 
88 33-2 
88 54-15 
April 
13. 
83 38-5 
94 47 
82 47-6 
95 
14-9 
89 
7 
75 
36-9 
101 
13 
78 53 
98 23-6 
88 31-62 
88 49-31 
15. 
83 5-5 
95 22-5 
82 30-9 
96 
27-2 
89 
21-52 
78 
21 
98 
23-3 
75 45.4 
101 46-7 
88 34-12 
88 57-82 
