in the position of the horizontal needle , &c. 
153 
North 
end of Needle 
to the W. S. W. 
In this position, both magnets were placed to the south of the compass ; the north pole of one magnet, 
and the south pole of the other, were directed towards the needle, so as to attract each extremity ; the 
distance from the centre of the box, to the end of the magnet attracting the north end of the needle, 
was 18,65 inches, and to that attracting the south end of the needle, 28,4 inches ; the needle then made 
1 vibration in 8,6 seconds, so that, the directive force was reduced in the ratio of 0,42 to 1. 
Date. 
Mean 
Time of 
Obser- 
vation. 
A. M. 
or 
Reading of 
north end of 
Temp. 
Fahren 1 , 
Direction of 
north end of 
needle dnring 
westerly daily 
variation. 
Time that a ho- 
rizontal needle 
took to make 
60 vibrations. 
Winds. 
Weather. 
Remarks, &c. 
P.M. 
needle. 
Instr. 
1825 . 
Mar. 14th 
h. m. 
1 5 
2 O 
A. M. 
S 68 30W 
68 30 
68 30 
68 30 
68 30 
68 30 
70 50 
70 10 
69 20 
6 9 35 
69 20 
68 20 
68 20 
6 8 40 
69 00 
68 20 
68 30 
69 00 
7 1 *5 
71 50 
72 00 
7 1 55 
72 00 
72 30 
72 3 ° 
73 00 
73 30 
74 3 o 
75 00 
75 3 ° 
75 3 o 
75 4 ° 
76 00 
76 15 
76 30 
76 50 
77 00 
77 00 
76 55 
O 
26 
ID. S. 
17 58,5 
17 5 8 »5 
1 8 1,2 
Calm 
Fine and 
Max. easterly 
variation. 
— 2 7 
— 2 7 
— 2 7 
— 2 7 
—27 
—27 
— 2 7 
— 2 7 
— 2 7 s 
— 2 72 
— 2 7 s 
—273 
— 2 7 i 
— 2 7 h 
— 2 5 
— 2 5 
— 2 5 
—25 
—23 
—23 
— 2 3 
—23 
— 2 3 
—23 
— 2 3 
— 2 3 
— 22| 
—22 \ 
—zz\ 
22 
clear, star 
light 
2 20 
2 50 
3 10 
• 
3 55 
? 10 
18 3,9 
1 8 00 
I 5 ° 
6 5 
7 00 
7 3 ° 
— 8 00 
9 00 
9 40 
10 30 
10 45 
I I 00 
. . -d . . 
d 
• • <73 • . 
. . <L> 
pd 
4-1 
0 
.. H .. 
18 4,2 
18 2,3 
18 7,8 
18 19 
18 10,2 
18 9,3 
1 1 40 
Noon 
Easterly 
Light 
Easterly 
Light 
Clear and 
*7 59>5 
fine 
0 30 
0 35 
0 40 
0 45 
0 50 
1 00 
P. M. 
Clear and 
Max. westerly 
variation. 
17 53 >° 
fine 
1 10 
1 20 
1 30 
1 35 
1 45 
2 00 
c 
rt 
XI 
. . <£ . . 
Calm 
Clear and 
2 5 
2 7 
2 15 
2 20 
2 30 
+ 2 40 
3 5 
3 2 7 
— 22 
— 22 
— 22 
— 22 
—221 
22i 
<D 
<D 
*d 
4— ■ 
O 
h 
1 7 48 
fine 
2 
— 221 
— 22| 

17 52 ,7 
* X 
MDCCCXXVI. 
