222 
LINES OF MAGNETIC DECLINATION IN THE ATLANTIC 
Table XII. (Continued.) 
Lat. 
Long. 
Date. 
Observer. 
Observed 
Declina- 
tion. 
Correc- 
tion for 
Epoch. 
Corrected 
Declina- 
tion. 
Remarks. 
Between the latitudes of — 
10° 
and 
—20° (continued). 
O 
-10 
05 
331 
49 
Mar. 1836. 
Vaillant. 
O 
9 
24 
O 
+0 
40 
O 
10 
04 
At sea. 
— 11 
25 
336 
37 
1836. 
FitzRoy. 
13 
06 
+ 0 
36 
13 
42 
At sea. 
— 10 
06 
340 
27 
Aug. 1842. 
Jehenne. 
15 
23 
-0 
28 
14 
55 
At sea. 
-10 07 
341 
02 
1836. 
FitzRoy. 
15 
57 
+ 0 
38 
16 
35 
At sea. 
— 11 
10 
342 
37 
Aug. 1842. 
Jehenne. 
16 
00 
— 0 
28 
15 
32 
At sea. 
-11 
59 
344 
10 
June 1846. 
Berard. 
21 
00 
-1 
10 
19 
50 
At sea. 
-12 
09 
345 
01 
Aug. 1842. 
Jehenne. 
17 
36 
-0 
28 
17 
08 
At sea. 
-19 
20 
345 
44 
Jan. 1840. 
Ross. 
18 
44 
0 
00 
18 
44 
At seaf. 
-18 
43 
346 
00 
Jan. 1840. 
Ross. 
17 
46 
0 
00 
17 
46 
At seaf. 
-17 
37 
346 
23 
Jan. 1840. 
Ross. 
19 
26 
0 
00 
19 
26 
At seaf. 
-17 
08 
346 
43 
Jan. 1840. 
Ross. 
20 
12 
0 
00 
20 
12 
At seaf. 
-13 
07 
347 
00 
Aug. 1842. 
Jehenne. 
19 
41 
-0 
26 
19 
15 
At sea. 
-16 
41 
347 
07 
Jan. 1840. 
Ross. 
19 
32 
0 
00 
19 
32 
At seaf. 
-16 
22 
347 
25 
Jan. 1840. 
Ross. 
18 
18 
0 
00 
18 
18 
At seaf. 
-10 
34 
347 
55 
Sept. 1837. 
Vaillant. 
18 
05 
+ 0 
24 
18 
29 
At sea. 
-15 
22 
347 
58 
Jan. 1840. 
Ross. 
20 
52 
0 
00 
20 
52 
At seaf. 
-15 
24 
348 
06 
Jan. 1840. 
Ross. 
20 
40 
0 
00 
20 
40 
At seat* 
— 15 
31 
348 
15 
Jan. 1840. 
Ross. 
20 
16 
0 
00 
20 
16 
At seaf. 
-15 
44 
348 
15 
Jan. 1840. 
Ross. 
19 
10 
0 
00 
19 
10 
At seaf. 
— 15 
37 
348 
27 
Jan. 1840. 
Ross. 
19 
11 
0 
00 
19 
11 
At seaf. 
— 15 
40 
348 
35 
Jan. 1840. 
Ross. 
18 
56 
0 
00 
18 
56 
At seaf. 
— 11 
22 
349 
32 
May 1839. 
Du Petit-Thouars. 
20 
14 
+ 0 
06 
20 
20 
At sea. 
-12 
25 
349 
43 
Sept. 1837. 
Vaillant. 
18 
40 
+0 
23 
19 
03 
At sea. 
— 14 
22 
349 
54 
Jan. 1840. 
Ross. 
19 
31 
0 
00 
19 
31 
At seaf. 
— 14 
11 
350 
28 
Jan. 1840. 
Ross. 
21 
24 
0 
00 
21 
24 
At seaf. 
— 14 
38 
350 
30 
Jan. 1840. 
Ross. 
21 
33 
0 
00 
21 
33 
At seaf. 
-13 
02 
350 
53 
1836. 
FitzRoy. 
19 
56 
+ 0 
33 
20 
29 
At sea. 
— 12 
40 
351 
06 
May 1839. 
Du Petit-Thouars. 
21 
16 
+0 
06 
21 
22 
At sea. 
— 14 
08 
351 
32 
Jan. 1840. 
Ross. 
21 
32 
0 
00 
21 
32 
At seaf. 
— 14 
36 
351 
53 
Jan. 1840. 
Ross. 
21 
08 
0 
00 
21 
08 
At seaf. 
-15 
04 
351 
57 
Jan. 1840. 
Ross. 
21 
10 
0 
00 
21 
10 
At seaf. 
-14 
11 
352 
00 
Jan. 1840. 
Ross. 
21 
06 
0 
00 
21 
06 
At seaf. 
— 13 
34 
352 
02 
Jan. 1840. 
Ross. 
22 
09 
0 
00 
22 
09 
At seaf. 
— 15 
26 
352 
20 
Jan. 1840. 
Ross. 
21 
39 
0 
00 
21 
39 
At seat- 
— 15 27 
352 
30 
Jan. 1840. 
Ross. 
21 
27 
0 
00 
21 
27 
At seaf. 
— 14 
28 
352 
52 
May 1839. 
Du Petit-Thouars. 
22 
18 
+ 0 
05 
22 
23 
At .sea. 
— 18 
29 
352 
55 
Feb. 1840. 
Ross. 
23 
11 
0 
00 
23 
11 
At seaf. 
-17 
38 
353 
19 
Feb. 1840. 
Ross. 
21 
37 
0 
00 
21 
37 
At seaf. 
— 15 
15 
353 
21 
Jan. 1840. 
Ross. 
21 
29 
0 
00 
21 
29 
At seaf. 
-17 
10 
353 
33 
Feb. 1840. 
Ross. 
20 
54 
0 
00 
20 
54 
At seaf. 
— 15 
21 
354 
07 
Jan. 1840. 
Ross. 
23 
27 
0 
00 
23 
27 
At seaf. 
-15 
55 
354 
17 
Feb. 1840. 
Ross. 
22 
53 
0 
00 
22 
53 
Anchorage at St. Helena. 
— 15 
55 
354 
17 
June 1846. 
Berard. 
23 
11 
-0 
58 
22 
13 
Anchorage at St. Helena. 
— 15 
55 
354 
17 
May 1839. 
Du Petit-Thouars. 
22 
17 
+ 0 
06 
22 
23 
Anchorage at St. Helena. 
-15 
57 
354 
19 
Jan. 1841. 
Magnetical Observ. 
22 
51 
— 0 
09 
22 
42 
St. Helena. 
— 15 
57 
354 
26 
1836. 
FitzRoy. 
19 
43 
+ 0 
33 
20 
16 
At sea. 
-16 27 
355 
24 
Aug. 1842. 
Jehenne. 
24 
03 
— 0 
25 
23 
38 
At sea. 
-19 
27 
355 
32 
June 1846. 
Berard. 
23 
20 
— 1 
01 
22 
19 
At sea. 
-16 
13 
355 
34 
June 1846. 
Berard. 
23 
11 
— 1 
01 
22 
10 
At sea. 
-18 
59 
356 
05 
June 1846. 
Berard. 
23 
20 
— 1 
01 
22 
19 
At sea. 
-17 04 
356 
33 
Sept. 1837. 
Vaillant. 
22 
28 
+ 0 
22 
22 
50 
At sea. 
-17 
13 
356 
45 
June 1846. 
Berard. 
23 
21 
— 1 
01 
22 
20 
At sea. 
-18 
12 
356 
55 
June 1846. 
Berard. 
24 
59 
-1 
01 
23 
58 
At sea- 
— 18 
52 
.357 
15 
Aug. 1842. 
Jehenne. 
25 
15 
— 0 
25 
25 
20 
At sea. 
-29 
00 
300 
56 
Jan. 1846. 
Sulivan. 
-10 
40 
-0 
24 
— 11 
04jRio Parana. 
