210 
I.INES OF MAGNETIC DECLINATION IN THE ATLANTIC. 
Table XII. (Continued.) 
Lat. 
Loi 
g- 
Date. 
Observer. 
Observed 
Declina- 
tion. 
Correc- 
tion for 
Epoch. 
Corrected 
Declina- 
tion. 
Remarks. 
Between the latitudes of 50 
0 
0 
03 1 
(continued). 
O 
45 
39 
289 
36 
Aug. 1844. 
Boundary Survey. 
0 
14 
07 
0 
-0 
16 
0 
13 
51 
Taschereau’s. 
47 
12 
289 
38 
1831. 
Bayfield. 
14 
49 
+ 0 
19 
15 
08 
Stone Pillar. 
47 
20 
289 
42 
1842. 
Lefrov. 
14 
16 
— 0 
06 
14 
10 
At seaf. 
42 
03 
289 
48 
Sept. 1 835. 
Graham. 
9 
20 
+ 0 
11 
9 
31 
Provincetown. 
46 
25 
289 
57 
Nov. 1844. 
Boundary Survey. 
15 
02 
-0 
17 
14 
45 
Astron. Station, S.W'. branch of 
the St. John’s River. 
48 
09 
290 
16 
1829. 
Bavfield. 
17 
35 
+ 0 
24 
17 
59 
Tadousac. 
47 
53 
290 
18 
1833. 
Bayfield. 
17 20 
+ 0 
16 
17 
36 
Brandy Pots. 
47 
51 
290 
26 
1831. 
Bayfield. 
17 
36 
+ 0 
19 
17 
55 
River du Loup. 
46 
57 
290 
33 
Sept. 1844. 
Boundary Survey. 
16 
29 
-0 
16 
16 
13 
Astron. Station. Big Black River. 
48 
12 
290 
51 
1829. 
U. S. Coast Survey. 
17 
34 
+ 0 
24 
17 
58 
Razade Islands. 
48 
37 
290 
53 
1831. 
f Sept.l 
Bayfield. 
17 
36 
+ 0 
19 
17 
55 
Port Neuf. 
47 
14 
290 
59 
-N &Oct. > 
1 1843. 1 
Boundary Survey. 
17 
24 
-0 
18 
17 
06 
Astron. Station, River St. Francis. 
47 
11 
291 
04 
Oct. 1842. 
Boundary Survey. 
17 
03 
-0 
13 
16 
50 
Astron. Station, near the. mouth of 
the River St. Francis. 
48 
25 
291 
11 
1830. 
Bayfield. 
17 
29 
+ 0 
24 
17 
53 
Bic Island. 
47 
16 
291 
16 
Oct. 1842. 
Boundary Survey. 
17 
58 
-0 
13 
17 
45 
Savage Island. 
48 
55 
291 
22 
1831. 
Bayfield. 
18 
48 
+ 0 
22 
19 
10 
Bersimis Point. 
47 
17 
291 
37 
Oct. 1842. 
Boundary Survey. 
17 
58 
-0 
13 
17 
45 
Bourgeois’s House. 
46 
31 
291 
38 
Aug. 1841. 
Boundary Survey. 
16 
43 
-0 
07 
16 
36 
Mouth of the Massardis River. 
47 
12 
291 
46 
Aug. 1842. 
Boundary^ Survey. 
17 
53 
-0 
12 
17 
41 
Lake Cleveland. 
47 
19 
291 
50 
Aug. 1843. 
Boundary Survey. 
18 
06 
-0 
17 
17 
49 
Mouth of Green River. 
41 
06 
292 
04 
June 1841. 
Barnett. 
10 
08 
— 0 
03 
10 
05 
At seaf. 
46 
46 
292 
10 
July 1841. 
Boundary Survey. 
17 
27 
-0 
07 
17 
20 
Near Fort Fairfield. 
49 
18 
292 
12 
1830. 
Bayfield. 
19 
57 
+ 0 
26 
20 
23 
St. Nicholas Harbour. 
46 
59 
292 
13 
Nov. 1841. 
Boundary' Survey. 
17 
43 
— 0 
08 
17 
35 
Peacock Hill. 
46 
47 
292 
13 
Oct. 1841. 
Boundary Survey'. 
17 
28 
— 0 
08 
17 
20 
Aroostook Hill. 
46 
38 
292 
13 
Oct. 1841. 
Boundary Survey. 
17 
15 
-0 
08 
17 
07 
Blue Hill. 
46 
07 
292 
13 
Dec. 1840. 
Boundary Survey. 
16 
09 
-0 
04 
16 
05 
Parks Hill. 
45 
57 
292 
13 
Oct. 1840. 
Boundary Survey. 
16 
00* 
-0 
03 
15 
57 
Astron. Station of the Boundary- 
Commission. 
49 
04 
292 
17 
1842. 
Lefroy. 
21 
37 
— 0 
08 
21 
29 
At seaf. 
49 
19 
292 
37 
1830. 
Bayfield. 
20 
13 
+ 0 
28 
20 
41 
Port de Monts. 
49 
38 
292 
49 
1832. 
Bayfield. 
21 
35 
+ 0 
24 
21 
59 
Egg Island. 
49 
06 
293 
14 
1830. 
Bayfield. 
21 
27 
+ 0 
28 
21 
55 
Cape Chatte. 
41 
04 
293 
19 
June 1841. 
Barnett. 
11 
55 
-0 
03 
11 
52 
At seaf. 
49 
36 
293 
21 
1842. 
Lefroy. 
22 
30 
-0 
08 
22 
22 
At seaf. 
* “ This observation was made at the Astronomical Station on the due north line, 4578 feet north of the Monu- 
ment marking the source of the River St. Croix. On a Cedar Post 8 inches square erected in 1817 by the 
Boundary Commissioners under the Treaty of Ghent, at the source of the River St. Croix, is the following in- 
scription : — ‘ Variation 13° 51'-2 by one instrument, and 14° by another,’ signed by ‘ Col. Joseph Bouchette, 
H.B.M. Surveyor, and John Johnson, U.S. Surveyor, 31st July, 1817.’ The Declination in 1840,” (as given 
above,) “is derived from the following observations made by Lieut. -Col. Graham and Lieut. T. J. Lee : — 
Oct. 18 and 19, 1840 < 
y Mean 16 00 
"By Draper’s compass No. 4 16 04' 
By Stancliffe’s compass No. 2 15 58 
By Draper Nicole’s compass No. 1 15 59 
By Draper Nicole’s compass No. 2 16 01 
By Potter’s compass No. 3 16 01 
-By Variation Transit 15 59 J 
“ It appears from the comparisons of the two determinations, one in 1817 and the other in 1840, that the West 
Declination has increased 2° 04''5 in 23'22 years; or at an average rate of 5'‘3 a year.” — Lieut.-Col. Graham, 
MSS. 
