in the position of the horizontal needle , &c. 
1 35 
North end of Needle to the North. 
At this time the magnets placed north and south of the needle, had their axes inclined to the magnetic 
meridian at an angle of 22 degrees, and the distance of their nearest ends from the centre of the needle 
was 32,95 inches. The time in which the needle now performed one vibration, was 10,24 seconds, and 
the directive force reduced in the ratio of 0,325 to 1. 
— 
Temp, 
Fahren 1 
Direction of 
Mean Time 
A. M. 
Reading of 
. north end of 
Time that a ho- 
j Date. 
of Obser- 
or 
north end of 
needle during 
rizontal needle 
Winds. 
Weather. 
Remarks, &c. 
vation. 
P. M. 
Needle. 
Instr. 
westerly daily 
took to make 
variation. 
60 vibrations. 
; 1825. 
In m. 
A. M. 
O / 
O 
m. s. 
[Apr. 15th 
I 20 
N 2 30 E 
— IO 
18 7,8 
NE byN 
Squally 
I 3 ° 
2 40 
—IO 
hazy low 
I 50 
2 40 
IO 
down 
2 15 
3 00 
2 00 
IO 
18 n,8 
18 11,9 
N 0 30 W 
1 20 
— iol 
4 00 
2 
1 I 
18 10,5 
18 0,8 
5 10 
4 00 
— 1 1 
. -a . . 
6 00 
4 30 
— 12 
c 
• cti • • 
18 0,4 
6 50 
8 20 
— 12 
6 51 
8 30 
— 12 
WS 
• fad * ’ 
*7 55 
8 00 
9 30 
— 11 
• TT . . 
18 2,8 
9 4 
9 30 
— 11 
a> 
• • • 
*7 59 
10 5 
9 50 
“ 9 
• • • 0 * * 
18 4,8 
11 00 
10 20 
— 7 
18 0,5 
17 42,7 
Max. westerly var. 
This needle was fre- 
-J-Noon 
P. M. 
10 40 
— 7 
-1 
. . . . 
NE mod. 
Hazy 
0 30 
8 00 
— 5 
• • . « 
....... 
with drift 
quently observed to vi- 
1 00 
6 30 
— 5 
• • . . 
17 47>5 
brate in very small arcs. 
1 30 
6 30 
■ — 5 
as it proceeded to the 
— 2 00 
2 30 
2 10 
2 10 
— 5 
— 5 
u. 
1 ‘ ’ 2 
r - 
1 7 52 
eastward from its Max. 
westerly position ; as well 
as in its progress again 
2 45 
5 00 
— 5 
to the westward, from 2 h 
3 00 
5 10 
“ 5 
18 1,2 
Max. easterly var. 
to 6 h P. M. It is also 
4 30 
5 5 
9 00 
9 50 
— 6 
— 7 
O 
• • • * 
18 11 
18 8,5 
Squally 
with drift 
worthy of remark that 
during the same interval, 
the intensity of the hori- 
+ 5 55 
10 20 
— 8 
• • • « 
18 8,2 
zontal needle was ob- 
6 55 
9 10 
— 8 
served to be very change- 
6 57 
8 40 
8 25 
8 00 
— 8 
18 7>5 
1 8 0,4 
able, and the action of 
7 5 2 
— 9 
Lt.breeze 
the suspended needles 
very irregular. 
9 7 
— 0 
18 8,7 
1 8 8,5 
from N. 
10 5 
7 20 
— 10 
—11 4 
6 50 
6 50 
— 10 
18 10,5 
18 9,3 
J 8 7.7 
Fine wea. 
Midn‘ 
— 10 
Easterly 
light 
Clear and 
Apr. 16 th 
5 10 
A.M. 
N 8 50 W 
— 1 1 
-a . • 
fine 
Max. westerly var. 
0 00 
6 20 
5 4 ° 
7 3 ° 
—10 
— 9 X 
a . . 
• 4 — » 
18 39,1 
iappen d at 2 h A.M, 
7 00 
10 10 
- 8| 
18 30,6 
8 00 
10 40 
— 62 
• • 
18 31,2 
9 l S 
10 25 
— 2 
<L) 
.rj • * 
18 52 
10 10 
12 00 
• — 1 
4 -» 
18 25,6 
+ 10 15 
12 5 
— 1 
H •• 
10 30 
12 5 
— 1 
11 10 
9 3 ° 
9 20 
-f 1 
18 16,8 
11 32 
+ 1 
0 58 
P. M. 
7 40 
7 10 
+ 2 
17 57.5 
18 10,8 
i 25 
■f* 4 
1 30 
6 30 
+ 4 
* 57 
6 10 
+ 4 f 
3 00 
3 20 
+ 5 
4 00 
3 30 
+ 5 
5 J 5 
7 10 
+ 3^ 
18 24,4 
