324 
Terrestrial Magnetism. 
* 
No.7. Farmer’s Creek, cae Oct. 5, 1839. Lat, 42° 13! N., Lon. 90° 23! W. 
Needle No. 1. B Nor Needle No. 2. A North. 
ste of in-{ Face of Face of in-| Face of 
ment. | needle. Dip indicated. strument. | needle. Dip er 
E. E. 71°27’ E. E. 72°15 
w. w. 73 24. w. w. 72 36 
w. E. 71 26 w. E. 72 16 
E. w. 73° 22 E. ee ee 
A North. B North. 
E. E. 73 44 E. E. 72 43 
w. w. 71 42 w. w. 72 37 
w. E. 73 51 w. E. 72 47 
E. Ww. 71 30 E. w. 72 33 
B)580 26 87580 23 
Mean, 72 33.25 “Mean, 72 32.875 
No.8. Prairie du Chien, W. T., Oct. 24, 1839. Lat. 43° 03! N., Lon. 90° 52! W. 
ace of i ce of 
strument.| needle. 
E. E. 
w. 
Ww. 
E. 
paar 
. A North. 
Dip indicated. 
7 
72 02 
8)586 11 
) 
“Mean, 73 16.375 
eedle No. 2.. B North. 
pace of in-| a of . 
rument. se edie. Dip indicated. 
E. E. 73°25 
w. w. %3 22 
Ww. E. to 2. 
E. Ww. 73 25 
A North 
E. E. 73 26.5 
= OW: w. 73 02 
w. | &. 73 14.5 
E. w. 72 58.50 _ 
“B)586 =) 
Mean, 73 16.875 
No. 9. Blue Mounds, (W. T.) Oct. 30, 1839. Lat. 43° 01! N., Lon. 
Needle = L. 
Face of in-| Face o 
soot. 
B North. 
Needle No 
Face of in-| Face of 
Lstrument. | . needle. 
89° 38' W. 
2. A North. 
Dip indicated: 
Dip indicated. 
4°59 
aN SM gata 
Z 
SE TS he mireenes ne 
Mean, 73 40.6875 
8)589 25.5 
