LIEUT.-COLONEL SABINE ON TERRESTRIAL MAGNETISM, 
21 
compare directly the horizontal intensities observed by Captain Belcher, with the 
computed intensities of M. Gauss’s theory. Table VI. exhibits the observed values. 
Table VI. — Observed Values of the Horizontal Intensity. 
Station. 
Panama 
Cocos Island . . 
Oahu 
Kodiack 
Sitka 
Woolwich .... 
Fort Vancouver • 
Baker’s Bay . . 
Bodega 
San Francisco . .<j 
Monterey 
S ta Barbara 
San Pedro 
San Diego 
San Quentin . . . . 
San Bartholomew 
Magdalena Bay . . 
Bay of St. Lucas. . 
'• 
Mazatlan . . . . < 
San Bias. 
Socorro Island . 
Number of 
Needles 
Days. 
Observations. 
5 
S. 
469-4 
1000 
7 
531-3 
1000 
8 
466-2 
1000 
9 
433-8 
1000 
[>1000 
7 
1 
11 
11 
470-0 
1000 
12 
400-4 
1000 
13 
390-4 
1000 
5 
463-9 
1024 
1 
11 
12 
463-5 
395-6 
1028 
1025 
>1022 
4 
1 
8 
13 
388-2 
1012 
J 
5 
510-3 
846 
I 
11 
12 
512-6 
436-5 
841 
841 
>841 
4 
3 
10 
13 
427-5 
834 
5 
685-1 
470 
470 
1 
1 
1 
5 
730-1 
413 
| 
11 
12 
730-1 
623-4 
414 
413 
!>412 
4 
1 
4 
13 
610-1 
410 
7 
9 
766-2 
626-9 
CO OO 
© OO 
OO 
>480 
O 
2 
6 
5 
616-9 
579 " 
11 
12 
619-8 
526-9 
575 
577 
>576 
4 
3 
12 
13 
515-2 
574 j 
5 
622-6 
569 
569 
1 
1 
2 
5 
559-9 
703 
703 
1 
1 
1 
5 
555-0 
716 ' 
11 
558-1 
709 
^711 
3 
1 
4 
12 
475-4 
707 . 
5 
549-0 
731 
731 
1 
1 
1 
5 
536-6 
765 
765 
1 
1 
1 
5 
536-5 
7 66 
766 
1 
1 
1 
5 
526-8 
794 
794 
1 
1 
1 
5 
513-1 
837 
837 
1 
1 
1 
5 
501-5 
876 
876 
1 
1 
1 
5 
488-5 
924 
924 
1 
1 
1 
5 
485-0 
937 
937 
1 
1 
1 
5 
486-7 
9?0 0 
7 
550-9 
930 
9 
11 
451-3 
487-0 
924 
931 
>928 
6 
3 
11 
12 
415-6 
928 
13 
407-3 
925 J 
5 
479-5 
959 ] 
7 
548-4 
957 
9 
11 
443-6 
480-0 
956 
959 f 
>958 
5 
2 
10 
12 
408-3 
962 
13 
400-2 
956 
5 
474-9 
977 
977 
1 
1 
2 
