48 Variation and Dip of the Magnetic Needle. 
Places. Lat. N. Lon. W.|. Dip Date. Authority, 
°o 1 410 / 
Montreal, L. C. 45 31/73 25177 6 |1833\Capt. Back. 
Halifax, N.S. 1834/Capt. Horne. 
“ 1837 66 
Cuneam N..: ¥; 75 11.3)1839/Prof. Loomis. 
Utica, N. Y. 3 if. Be - 
Praise du Chien, W. T. 16.8} “ {Prof. Locke. 
Madison as 43 A} "i 
Syracuse, N. ¥. 50.9} “ |Prof. Loomis. 
Buffalo, bis st 
Mineral Poing 5 Pe ie « -|Prof. Locke. 
Schenectada, N. Y. « |Prof. Loomis. 
Albany, N. Y. ‘6 “3 
Dubuque, Iowa, «« |Prof. Locke. 
ambridge, Mass. * |Prof. Loomis. 
Detroit, Mich. “ = 
Dorchester, Mass. «© IMr. Bond. 
Ann Arbor, Mich * |Prof. Loomis. 
Spring ei » Mass 
Longuieadaw Mass. 
Mich. 
Sandusky, O 
Hudson, Ohio, 
ee oe 
“tae? 
Beaver, Penn. 
c : 
Philadelphia, Penn. 
bau more, Md. 
Cincinnati, Ohio, 
sshington Say 
St. Louis, Mo. 
oe Ky. 
sé 
41 
Davenport, ek adage 
41 
ee 
«© |Prof. Locke. 
* |Prof. Loomis. 
1838 6 
1839 “ 
9/1840 “ 
1839 se 
6e sé 
a 6é “ 
.9|1838)Pres. Bache. 
1839|Prof. Loomis. 
7 2 ee 73 
84 27:70 27 |1840|Prof. Locke. 
17 ie 13 |1838\Lieut. Wilkes. 
77 «1171 21.4)1839\Prof. Loomis. 
90 1669 31.4) “ |Prof. Locke. 
85 46,70 iy & 
85 Se aboi ned 56 |1840 “6 
2867 45 |1834\Capt. Horne. 
63 28167 18 [18361 
“cé 
Prof. Locke. 
Prof. Loomis. 
