Magnetism in the United States. 



17 



TABLE in. 



M 



Magnetic observations from various sources, not heretofore jpublished^ and collected 



for this discussion. 



Name of place. 



Heiner's Run, N. Branch, Susquehan 

 na, Pa. - - - . - 



Kelly's Jslfind, west end Lake Erie, 

 East Sister Isle, west end Lake Erie 

 West Sister Isle, we&t end Lake Erie 

 Sloney Point, - • . - 



Waugoshane Point, Mackinac Straits 

 East of Duncan city, " " 



Near Newport, Franklin county, Mo 



do. do. 



Port Union, - - - - - 

 Fort Benton, - - • . - 

 Fort Otven, - - - - - 



FortWallrt-Walla, 

 Panama, New Granada, 



Lat. 



41 

 41 

 41 

 41 



41 

 45 



45 



38 



21 



36 



49 



44 



56 



45'4 



361 



34 



Long, Decliuat'ii, Date 



48 00 f 

 47 52 

 46 31 

 46 04 

 8 57-21 



77 48 



82 43 

 62 51 



83 06 



83 15 



84 55. 

 84 07, 

 91 06 



103 59 

 110 36 



113 58 



118 48 

 79 29- 



Autliority. 



+ 3 



- 2 



- 2 



- 2 



8- 2 



- 1 



- 9 



- 9 

 -16 



-19 



-i9 

 -19 



4' 6 





19w 



13 E. 



18 

 20 

 07 

 13 

 53 

 21 



05 

 48 

 00 



25 

 40 

 54-6 



1856 

 1846 

 1847 



1848 

 1853 

 1851 

 183y 

 1849 

 1853 



1849 



S. Tyndale. 



U.S. Top.Engin'rs. 



do, 



do. 



do, 



do. 



do. 

 Dr. Goebel. 



do. 

 ^ G*v.l. LStevens. 

 I N. Pacific Rail- 

 j road Explora- 



J tions. 

 Mexican Bdry.Sur. 



TABLE IV. 



Residual differences between the Coast Survey observations reduced to 1850, and the 



values obtained from the accompanying maps. 



No.! 

 I 



3 

 4 

 5 

 6 



7 

 8 

 9 



10 



11 

 12 



13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 



23 



Station. 



i 



Mount Harris, - 

 Ragged Mouritain, 

 Camden Village, 

 Mount Seballis, - 

 Mount Pleasant, - 

 Cape Small, 



Mount Independence, 

 Burlington, - 

 Bowdoin Hi!l, - 



Richmond Island, 

 Fletcher's ISeck, 

 Kennebunk Port, 



Mount Agamenticus, «■ 

 Cape Neodick, - 

 Pailurawa,- 



Kittery Point, - 



Mount Unkonoonuc, - 



Isle of Shoals, - 



Plum Island, 



Annis Squara, - 



Beacon Hill, 



Bviker's Island Light, - 



Fort Lee, - - - 



Declination. 



I 



Dip. 





+ 14 06 

 13 54 



13 36 

 12 35 



14 24 

 11 57 



II 45 



9 29 



11 32 



12 15 

 11 14 



11 15 



10 21 



11 00 

 10 45 

 10 27 



9 10 



10 15 



10 02 



-0 



U 



: 



24 

 25 



26 



Coddon^s Hill, - 

 Little Nahnnt, - 

 liorchester Heights, - 



Nantasket. - . . 

 Bluellill, . 

 Beacon Pole Hill, 

 Manoraet Hill, - 



Copecut Hill, 



27 

 28 

 29 

 30 



31 



i 32 ' t?pencer*s Hiil, , 



+ 



-2 



+ 

 + 



+ 



+ 



11 

 11 



39 

 23 



12 18 

 10 16 



10 21 



11 51 



9 43 



9 48 

 9 45 

 9 49 

 9 35 

 9 53 

 9 38 



9 35 

 9 32 



+ 

 + 



-1 



+ 



+ 



6 

 27 



8 



6 



48 



19 



3 



1 



9 



40 



10 



6 



30 



1 



27 



15 



37 



26 



19 



21 



5 



18 



16 



21 



48 



8 



9 



6 



4 



5 



50 



10 



29 

 41 





t 



76 02 

 75 32 

 75 32 

 75 35 

 75 59 



74 58 



75 24 

 75 44 

 75 11 

 75 07 

 75 17 



75 11 



74 57 

 74 55 



76 50 



74 56 



75 10 

 74 46 

 74 53 



74 27 



74 19 



75 26 



75 



74 30 

 74 16 

 74 18 

 74 18 

 10 

 74 27 

 74 34 

 74 04 



74 14 



75 13 



o t 



+ 04 

 + 13 



+ 12 



+ 8 



- 20 

 + 32 



+ 3 



+ 10 



+ 10 



+ 8 



+ 1 



2 



+ 6 



+ 8 



- 1 50 

 + 4 



- 19 



+ « 

 8 



Ilor. Intensity. 



+ 

 + 



9 

 14 



3-28 

 337 

 337 

 3-43 

 3-22 

 3-40 

 336 

 3-46 

 3 46 

 3-46 

 344 

 346 

 3 45 

 3 53 

 3U2 

 350 

 347 

 3-47 

 353 



I 



- 53 



+ 



+ 



+ 



+ 



3 

 5 

 3 

 2 



52 

 18 



27 



3 

 20 



1 20 



3 62 

 3 09 



-004 



- 06 

 " -05 



- -09 

 + -15 



- 01 

 + -05 



- '11 



- -03 



- -01 

 + -02 

 -I- -02 

 + -05 



- 03 

 •51 

 ■02 

 •09 

 •07 

 -04 



+ 

 + 

 + 

 + 



+ 



353 



3-55 

 3 58 

 3 57 

 3 56 

 3 50 



3 62 



I 



t 



+ 

 + 



+ 



+ 

 + 



! 



02 



■08 



+ -<^ 



•09 

 ■07 

 08 

 ■09 



■17 



+ 09 





The sign + or - shows how the residual i» to be applied to the observed value to give 

 that on the map. r 



SECOND SERIES, VOL. XXIV, NO. 70. — TULYy 1057. 



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