138 Capt. Sabine’s observations on the magnetic needle . 
On ice in Baffin’s Bay , lat. 7 6 ° 08 !-', long. 78 ° 21 ' W. 
In the magnetic meridian. 
Number of 
vibrations. 
Interval. 
Mean 
Time. 
"5 IA IA LAN l-TN 
CO 
100 
100 
m. s. 
7 IS 
7 17 
Arc. 
O 
O *“• ^ 0 \ •-* OO VO 
00 la rf- r<^ N « >-< 
No. of 
vibra- 
tions. 
00000000000 
— N c-i Th UI-.VO r^oo C?\ O 
100 
7 16 
Perpendicular to the meridian. 
Number of 
vibrations. 
Interval. 
Time. 
CO 
10 IA to to U-% IA IA 
Q VO IA H" N tn to to tA N 
Qj ^ 
CO 
100 
m. s. 
7 18 
Arc. 
O 
O n ia ia k - i-n 
On IA Tl* fA N N — « -« 
No. of 
vibra- 
tions. 
! 
OOOOOOOOOOO 
» N n + u-nnO t^oo On O 
On an iceberg in Davis’s Straits, lat. 70 ° 33 ', long. 66 ° 55 ' 
In the magnetic meridian. 
Number of 
vibrations. 
Interval. 
Mean 
Time. 
CO 
"O IA IA 
£ VO 
<D 
CO 
100 
100 
m. s. 
7 16 
7 16 
Arc. 
0 
un r^vo co — m Onno - 1 - N 
00 - 4 - mi N N M 
No. of 
vibra- 
tions. 
OOOOOOOOOOO 
-1 N mi -*• l^no r^.00 On O 
100 
7 16 
Perpendicular to the meridian. 
Number of 
vibrations. 
Interval. 
Time. 
"O L n IA IA IA LA LA IS) 
O'O 
co 
100 
m. s. 
7 18,5 
Arc. 
• 
O O r^t^o ^OnlaM Os r%. 
CsvO tA N "• >-* »-» 
No. of 
vibra- 
tions. 
1 
OOOOOOOOOOO 
— n m -h lono r^oo On o 
