Variation and Dip of the Magnetic Needle. 301 
Table, oe = Variation of the Magnetic Needle in — oe of the Uni- 
ed States, from the first settlement of th 
| Place. Lat. N.|Lon. W.; Variation. | Date. | Authority. 
AIN Oo 14D rio ’ | 
N. dotcdery of State, 48 1/67 55,17 45 w.)1818 Mr. John Johnson. 
Timiscuata Lake, 47 38169 O16 31 1818 « “ 
Matwaska, 47 1268 1016 45 |j1818° “ bs 
Source of tl oe ix,}45 55/67 55/14 OO |1817 o - 
Forks of Penobscot, (45 30/68 30/14 45 [1825 Mr. J. Herrick. 
Mouth of the St. Ceili 45 567 1212 19 |1797,Chart. 
Ha 44 4068 5511 15 |1805.Mr. J. Herrick. 
ss sel ee ee 1IQ 4 1 se sé 
Pownal, 43 5170 10) 8 O- [1761 Prof. Winthrop. 
Falmouth, 43 39:70 19|7 45 |1763 “ se: 
Kittery, 43 670 35) 7 46 (1771 Holland. 
NEW HAMPSHIRE, = 
Hanover, 43 41,72 10| 7 O (1765 Pres. Wheelock. 
oe ot toe “hs 4 15 1810 “6 73 
Portsmouth, 43 5/70 45 7 48 (1771 Holland. 
Chesterfield, 42 53,72 20) 6 26 +|1812 Nathan Wilde. 
6“ 66 6s “| 6 25 1813 “6 6“ 
6“ se eel ee we) G& 17 1814 6s ss 
ia be be | th be 6 7 1815 “ sé 
ce (ta ee) ee 2 6 4 1S16 sé“ “cc 
oe ee sé 66 6 2 1817 sé se 
“ce se sole wl g g 1818 ‘e “ 
“cc 6 66) eT GG 3 1819 6 6 
ss (Te) ee) ed 6 0 1820 “cc iT4 
(73 se Se es ae {821 6“ 6“ 
ss se selec 6] G 1D 1822 3 “cc 
ss CT ee. ee) ee 6 30 1823 “cc “cs 
6“ se ee | ee 6) G& 40 1824 6“ T3 
ra $46 et 35 1895) sc (73 
6c 66 6c; 6G CGE 6 35 1826 “6 “ec 
ac 66 66) eG 45 1827 sé sé 
sé se 66 | ok OG 6 52 1828 “ec ee 
“e (7 ey ee ee 7 oO 1829 sé ee 
se [Te ) ee | ee 7 6 1830 3 ac 
6s CL ef 10 11831 6“ sé 
as 66 66 | Gk OS vi 15 1832 oe sé 
“cc 66 66 | 66 OSE 7 30 1833 “6 6é 
ts dé 66 p68. e6 F oy 35 1834 6a 6 
“ss 66 6h | 6k Oke | 40 pe 66 sé 
ss ee ee Bear f 45 “ce “ec 
ex we whe 6) 8 5 = & ba Twining. 
Hinsdale, 42 4672.17 6 0 (tTWri 
ected | 
Barto 44 44/72 3/10 51 ‘|1837\Mr. A. C. Twining. 
Burlington, 44 28/73 14| 7 38 1798 Dr. Williams. 
se ee} se 66) 7 30) 1818\Mr. John Johnson, 
