328 
MAGNETIC SURVEY IN NORTH AMERICA. 
Table LI. General Table of the Observations of the Magnetic Inclination. 
Lat. 
Long. 
Year. 
Observer. 
Inclination. 
Between 68° 
30' and 69° 30'. 
38 23 
272 30 
1840. 
Locke. 
69 22-8 
O / 
37 59 
272 13 
1840. 
Locke. 
68 56-3 
38 11 
272 12 
1840. 
Locke. 
69 03-6 
38 38 
269 56 
1839. 
Locke. 
69 31-4-] 
38 38 
269 56 
1841. 
Loomis. 
69 25*5 
-69 27*9 
38 38 
269 56 
1841. 
Nicollet. 
69 26*9 J 
69° 30' 
to 70° 30'. 
38 06 
275 42 
1840. 
Locke. 
69 54*5 
37 54 
275 42 
1840. 
f 1838 1 
Locke. 
69 49*0 
39 06 
275 38 
to 
| 1844. 1 
Locke. 
70 26*5] 
>70 27*1 
39 06 
275 38 
1841. 
Loomis. 
70 27*7 „ 
38 36 
275 38 
1840. 
Locke. 
70 04*1 
38 14 
275 20 
1840. 
Locke. 
69 54*9 
38 03 
274 30 
1840. 
Locke. 
69 54*4 
38 05 
273 35 
1840. 
Locke. 
69 33*8 
38 43 
38 43 
272 35 
272 31 
1840. 
1841. 
Locke. 
Loomis. 
69 51*0] 
69 52*8 J 
.69 51*9 
38 50 
270 07 
1841. 
Loomis. 
69 57*7 
39 04 
270 07 
1841. 
Loomis. 
69 49*1 
38 55 
269 57 
1841. 
Loomis. 
69 45-7 
38 54 
269 56 
1841. 
Loomis. 
69 34*8 
38 57 
269 55 
1841. 
Loomis. 
69 38*9 
70° 30' 
to 71° 30'. 
38 53 
282 59 
1839. 
Loomis. 
71 21*41 
38 53 
282 59 
1841. 
Graham. 
71 15*9 
38 53 
282 59 
1844. 
Graham. 
71 10*5 
>71 15*0 
38 53 
282 59 
1841. 
Nicollet. 
71 14*8 
282 59 
1842. 
Lefroy. 
71 13*8 
38 53 
282 59 
1844. 
Locke. 
71 13*4 
38 53 
282 59 
1844. 
Locke. 
71 39*3 
38 53 
282 59 
1844. 
Locke. 
71 34*8 
38 53 
282 59 
1844. 
Locke. 
71 14*9 
38 53 
282 59 
1844. 
Locke. 
71 20*5 
38 53 
282 57 
1844. 
Locke. 
71 19*0 
38 41 
282 53 
1844. 
Locke. 
70 55*5 
39 25 
278 32 
1845. 
Locke. 
71 22*3 
39 59 
277 31 
1841. 
Loomis. 
71 10*1 
39 57 
276 57 
1840. 
Locke. 
71 04*9' 
1 
39 57 
276 57 
1841. 
Loomis. 
71 03*7 
>71 04*3 
39 57 
276 57 
1845. 
Locke. 
71 04*3 
J 
39 54 
276 09 
1840. 
Locke. 
71 27*4 
39 26 
275 54 
1840. 
Locke. 
71 02*7 
. 39 38 
275 51 
1845. 
Locke. 
71 10*0 
39 22 
275 47 
1840. 
Locke. 
70 54*2 
. 39 44 
275 43 
1838. 
Locke. 
71 22*7 
| 71 22*3 
. 39 44 
275 43 
1840. 
Locke. 
71 22*0 
39 23 
275 28 
1840. 
Locke. 
70 58*0 
39 30 
275 22 
1845. 
Locke. 
71 10*0 
39 49 
275 13 
1845. 
Locke. 
71 20*3 
40 35 
270 24 
1841. 
Loomis. 
71 13*2 
Station. 
Princeton . . . . 
Mount Vernon 
New Harmony 
St. Louis 
St. Louis 
St. Louis . . . 
Lexington . . 
Clay’s Ferry 
Cincinnati 
Cincinnati . . . 
Williamstown. 
Frankfort . . . 
Louisville . . . 
Paoli 
Vincennes . . . 
Vincennes . , . 
Edwardsville . 
Bunker’s Hill. 
Upper Alton . 
Alton 
Monticello . . . 
Washington 3 . . 
Washington 3 . . 
Washington 3 . . 
Washington 3 . . 
Washington 3 . . 
Washington 3 . . 
Washington 1 * . . 
Washington 0 . . 
Washington d . . 
Washington 6 . . 
Georgetown . . 
Mount Vernon 
Marietta Island 
Hebron 
Columbus .... 
Columbus .... 
Columbus .... 
Springfield .... 
Lebanon 
Carrolton . . . 
Mason 
Dayton 
Dayton 
Hamilton .... 
Oxford 
Richmond 
Pekin 
3 Grounds East or West or in front of the Capitol. 
0 Old Depot near Georgetown. d Near the Patent Office. 
b Magnetic Observatory. 
e Near the War Office. 
