80 C. A. Schoti—Magnetic Deciination in the United States. 
TABLE IIl—continued. 
Year. Obsd. Compd.| Year. Obsd. Compd.| Year. Obsd. Compd. 
Albany, N. Y. Detroit, Mich. Philadelphia, Pa. 
18178 +573 +65°71/1810% —2°80 —3°10|17015 +850 4863 
1818°6 5°75 6°78| 1822-5 —822 —2-82/1710°5 8°50 8°30 
1825°3 6:00 6°07 | 18285 —2-83 2°61 |1750°5 5°75 5:25 
1828°6 6°27 6-26/1835°5 —217 —23111793°5 1°50 2°27 
1830°5 6°30 6°37| 18405 —1-97 —2-07|1802°5 1°50 2°08 
1831°6 6°54 6°44| 18595 —0-70 1-01 | 1804-5 2-08 2-07 
1831°8 6°67 6°64 18655 —0-67 6°66 |1813°5 2°43 2°12 
1836°8 6°78 6-77 | 1872-4 —0-42 —0-28|1837°5 3°87 3°16 
1847°9 1-58 757 | 1873-4 —0-29 0°22 |1840°5 3 62 3°37 
1855°7 T91 8-16 841-7 3°90 3°46 
1856 8-58 8-23 1846-4 3°85 3°82 
18584 448928 «44827 855-7 453 4°60 
New York City. 1862°6 5-00 5°22 
Oxf nae " : 
: ng [18728 +546 +4614 
17940 43:00 +2:96)| 16865 +8°75 +878 
1817°5 3-00 3°31 | 1691°5 8-75 8-68 Washin D.C. 
1828°5 4°50 3°79 | 1723°5 7°33 7-53 oa ape ~~ 
; ; penn |1792°5 0-24 0-08 
aeeee Gt | Aes Sas Ee. Geet Clee 
1836°8 4°15 4°26 | 1755°5 5-00 5-46 5A 
89°5 4°33 4-39 | 1841-0 1°34 1 
1837-5 4°50 4°3 ; : 1°59 
824°5 467 4-64 |1842°0 1-40 
; . ‘83 5-17 
1849-9 5-18 5-14 | 1834°5 4'8 1856°6 2-36 930 
: j 5 5 5°67 5°37 
1857°3 5°73 5°68 | 1837 1857°2 9-41 9°34 
6 5-45 5°61 . 
1858°1 5-78 5-74 | 1840 : 0. 2-50 
att OO f euap 
1859-0 5°83 5°81 * 1862°7 2-66 2°59 
¢ ! 44°6 6-22 5°92 
ade eel eee a 61 [28686 270 «= 28 
18744 +693 46:97) 1845 6-42 6-01 ‘ : aT 
: : “on |1866°8 2-74 2 
846°3 5°56 6°05 80 
Buffalo, N.Y 847°8 5-68 6:16 1867°5 2°80 hy 
Piers 000 4001 | Webbe B18, wt ee ee ae 
18375 = +142 117 | 18607 "13 £08 ores as 2-92 
1839°5 1:25 1:30|1873'8 +762 +1763 
; : ; 1871°5 2°95 2°96 
1845°5 1°42 171 r* 
: 1872°5 3-00 300 
1859-5 2°94 2°81 ‘ 
cael : : 1873-5 3-00 3°04 
18735 +397 +397 Hatboro, Pa. - 
Erie, Pa. 16805 +847 + : 49 Cape ae Va. 
17955 = —0°72 0-72 | 1690- 8°25 30 |17325 +46 +4°74 
18416 +650 +051/1700°5 792 1 1809°5 +000} 0°03 
-1862- 4155 41°52} 17105 TAT 749118325 +0-75 0°34 
1873-4 +2°0) 42-03| 17205 7-00 6°95 |1856-7 +147 171 
730°5 “42 6°30 |1865°8 [+254] +240 
Cleveland, O 740°5 5-58 5-56 
1796-7 —2:00 —2-10/1750°5 4-92 4°67 Charleston, S. C. 
1830°5 1:33. = —1°03 | 1760°5 4-00 3°75 |1742°5 [—65-38] —3°69 
18316 = —1:25 —098/1770°5 2°92 2°89 |1775 —3°80 06 
18341 —0:83 —0-87| 1780-5 2-08 2°21/17841 —525 —613 
1838°1 058 —0-69|1790°5 1:83 1°84/1785°8 —5:75 —513 
1841°3 —0-09 —0:54/ 1800-5 1°92 179 |18250 —376 —3%5 
18455 —065 —0°35/1810°5 2-00 207118375 —290 —2°95 
1859°5 +0°77 +4029! 1820- 2°45 2°56|1841-4 —240 —2°69 
1871-8 +054 +4079) 18305 3-00 320118478 —2:25 —227 
18725 +075 40°81 | 18405 3°83 3°89 |1849°3 —2:28 —2:17 
18735 +085 +0°85|18505 +442 4460118744 —0°97 0°82 
