LINES OF MAGNETIC DECLINATION IN THE ATLANTIC. 
223 
Table XII. (Continued.) 
Lat. 
Long. 
Date. 
Observer. 
Observed 
Declina- 
tion. 
Correc- 
tion for 
Epoch. 
Corrected 
Declina- 
tion. 
Remarks. 
Between the latitudes of — 20° and 
— 
1 CO 
o 
o 
-27 27 
301 
16 
Jan. 1846. 
Sulivan. 
O 
9 
24 
O 
-0 
24 

O 
9 
48 
Corrientes Fort. 
—27 26 
311 
25 
June 1832. 
FitzRoy. 
— 
6 
30 
+ 1 
00 
— 
5 
30 
St. Catherine. 
-29 
53 
311 
48 
June 1832. 
FitzRoy. 
— 
6 
27 
+ 1 
00 
— 
5 
27 
At sea. 
-27 
56 
312 
42 
Feb. 1837. 
Du Petit-Thouars. 
— 
4 
30 
+ 0 
23 
— 
4 
07 
At sea. 
— 28 
41 
313 
39 
April 1836 
Vaillant. 
— 
4 
12 
+ 0 
30 
— 
3 
42 
At sea. 
-27 
16 
313 
44 
June 1832. 
FitzRoy. 
— 
5 
10 
+ 1 
00 
— 
4 
10 
At sea. 
-27 
14 
314 
10 
June 1832. 
FitzRoy. 
— 
4 
34 
+ 1 
00 
— 
3 
34 
At sea. 
-26 
09 
314 
18 
Feb. 1837. 
Du Petit-Thouars. 
— 
2 
44 
+ 0 
23 
— 
2 
21 
At sea. 
— 28 
15 
314 
53 
May 1830. 
Erman. 
— 
4 
10 
+ 1 
16 
— 
2 
54 
At sea. 
-26 
18 
315 
28 
May 1830. 
Erman. 
— 
3 
31 
+ 1 
16 
— 
2 
15 
At sea. 
-26 
49 
315 
55 
April 1836. 
Vaillant. 
— 
3 
06 
-hO 
30 
— 
2 
36 
At sea. 
-26 
33 
316 
12 
June 1832. 
FitzRoy. 
— 
3 
39 
+ 1 
03 
— 
2 
36 
At sea. 
— 24 
12 
316 
23 
Feb. 1837. 
Du Petit-Thouars. 
— 
2 
04 
+ 0 
23 
— 
1 
41 
At sea. 
— 24 
12 
316 
36 
May 1830. 
Erman. 
— 
2 
10 
+ 1 
20 
— 
0 
50 
At sea. 
— 23 
30 
316 
40 
Feb. 1837. 
Du Petit-Thouars. 
__ 
2 
00 
+ 0 
23 
— 
1 
37 
At sea. 
— 24 
43 
316 
47 
May 1830. 
Erman. 
— 
2 
41 
+ 1 
20 
— 
1 
21 
At sea. 
— 23 
46 
316 
49 
.May 1832. 
Erman. 
— 
1 
30 
+ 1 
20 
— 
0 
10 
At sea. 
— 23 
03 
316 
54 
June 1 832. 
FitzRoy. 
— 
1 
39 
+ 1 
03 
— 
0 
36 
At sea. 
— 22 
55 
3l6 
55 
June 1832. 
FitzRoy. 
— 
2 
00 
+ 1 
03 
— 
0 
57 
Rio de Janeiro. 
—22 
54 
3l6 
55 
June 1830. 
Erman. 
— 
2 
08 
+ 1 
20 
— 
0 
48 
Rio de Janeiro. 
-22 
54 
316 
55 
April 1836. 
Vaillant. 
— 
0 
50 
+ 0 
31 
— 
0 
19 
Rio de Janeiro. 
— 22 
54 
316 
55 
Feb. 1837. 
Du Petit-Thouars. 
— 
0 
51 
+0 
23 
— 
0 
28 
Rio de Janeiro. 
— 22 
54 
3l6 
55 
July 1845. 
Von Helmriecher. 
— 
0 
13 
-0 
47 
— 
1 
00 
Rio de Janeiro. 
— 24 
06 
317 
07 
June 1832. 
FitzRoy. 
— 
1 
57 
+ 1 
03 
— 
0 
54 
At sea. 
— 24 
00 
317 
09 
Feb. 1847. 
Stanley. 
— 
0 
47 
—1 
00 
— 
1 
47 
At seaf. 
— 23 
09 
317 
17 
June 1 830. 
Erman. 
— 
1 
39 
+ 1 
20 
— 
0 
19 
At sea. 
-24 
38 
317 
19 
Jan. 1844. 
Pasley. 
— 
1 
00 
-0 
34 
— 
1 
34 
At sea. 
— 25 
23 
317 
37 
April 1836. 
Vaillant. 
— 
1 
09 
+ 0 
32 
— 
0 
37 
At sea. 
-23 
00 
318 
03 
July 1828. 
Foster. 
— 
1 
07 
+1 
40 
+ 
0 
33 
Cape Frio. 
— 24 07 
318 
07 
April 1836. 
Vaillant. 
— 
0 
30 
+ 0 
32 
+ 
0 
02 
At sea. 
-23 
05 
318 
10 
April 1836. 
Vaillant. 
— 
2 
30 
+ 0 
32 
— 
1 
58 
At sea. 
-29 
17 
318 
13 
Dec. 1843. 
Pasley. 
0 
00 
— 0 
34 
— 
0 
34 
At sea. 
-23 
30 
318 
13 
June 1830. 
Erman. 
— 
1 
03 
+ 1 
20 
+ 
0 
17 
At sea. 
-27 
11 
318 
38 
Jan. 1844. 
Pasley. 
0 
00 
-0 
34 
— 
0 
34 
At sea. 
— 24 
56 
318 
38 
April 1836. 
Vaillant. 
— 
0 
23 
+ 0 
34 
+ 
0 
11 
At sea. 
— 22 
58 
318 
45 
June 1832. 
FitzRoy. 
— 
0 
24 
+ 1 
07 
0 
43 
At sea. 
— 22 
53 
319 
18 
Feb. 1837. 
Du Petit-Thouars. 
+ 
2 
12 
+ 0 
26 
2 
38 
At sea. 
— 25 
59 
319 
19 
Feb. 1847. 
Stanley. 
1 
33 
-1 
04 
0 
29 
At seaf. 
—22 
42 
319 
39 
June 1832. 
FitzRoy. 
0 
03 
-fl 
10 
1 
13 
At sea. 
— 24 
48 
320 
23 
June 1830. 
Erman. 
1 
03 
+ 1 
30 
2 
33 
At sea. 
-20 
50 
320 
32 
Dec. 1843. 
Pasley. 
3 
00 
-0 
38 
2 
22 
At sea. 
— 22 07 
320 
39 
Jan. 1847. 
Stanley. 
3 
01 
— 1 
06 
1 
55 
At seaf. 
—20 
12 
322 
06 
Jan. 1847. 
Stanley. 
5 
05 
-1 
06 
3 
59 
At seaf. 
-27 52 
322 
42 
Jan. 1847. 
Stanley. 
2 
20 
-1 
06 
1 
14 
At seaf. 
— 24 
52 
323 
43 
June 1830. 
Erman. 
2 
20 
+1 
30 
3 
50 
At sea. 
—20 
38 
324 
44 
June 1830. 
Erman. 
3 
32 
+1 
30 
5 
02 
At sea. 
—22 
28 
324 
46 
June 1830. 
Erman. 
3 
33 
+ 1 
30 
5 
03 
At sea. 
— 22 
39 
324 
59 
Oct. 1842. 
Berard. 
3 
30 
— 0 
26 
3 
04 
At sea. 
— 24 
03 
325 
08 
June 1830. 
Erman. 
3 
12 
+ 1 
35 
4 
47 
At sea. 
-25 
00 
325 
16 
June 1830. 
Erman. 
2 
45 
+1 
35 
4 
20 
At sea. 
-25 
09 
327 
42 
Oct. 1842. 
Berard. 
5 
00 
— 0 
26 
4 
34 
At sea. 
—26 
58 
329 
17 
Oct. 1842. 
Berard. 
4 
15 
— 0 
27 
3 
48 
At sea. 
-20 
30 
330 
37 
Dec. 1839. 
Ross. 
8 
01 
0 
00 
8 
01 
At seaf. 
— 21 
30 
330 
46 
Dec. 1839. 
Ross. 
9 
43 
0 
00 
9 
43 
At seaf. 
-22 
40 
330 
52 
Dec. 1839. 
Ross. 
9 
01 
0 
00 
9 
01 
At seaf. 
— 23 
19 
330 
56 
Dec. 1839. 
Ross. 
7 
45 
0 
00 
7 
45 
At seaf. 
2 G 2 
