in the position of the horizontal needle , &c, 
151 
North end of Needle to the N. W. 
Date, 
Mean 
Time of 
Obser- 
vation. 
A. M. 
or 
P.M. 
Reading of 
north end of 
Needle. 
Temp. 
Fahren 1 . 
Direction of 
north end of 
needle during 
westerly daily 
variation. 
Instr. 
1825. 
h. m. 
0 / 
0 
Mar. 5 th 
I 00 
P. M. 
N 46 00W 
—25! 
1 30 
45 40 
— 24! 
2 OO 
45 4° 
—24$ 
2 30 
46 10 
—241 
3 00 
46 10 
—25 
3 20 
44 00 
—25 
— 3 5° 
43 5° 
—25 
4 55 
44 00 
— 26 
6 , 5 
44 00 
—27 
6 45 
44 00 
—27 
7 4° 
44 20 
-—27 
9 10 
45 20 
— 261 
9 32 
45 20 
2 
—27 
9 58 
45 3° 
—27 
10 30 
45 45 
—2 7 
1 1 4 
45 35 
— 27 
11 27 
45 30 
-27 
Midn 1 
45 3o 
—27 
Mar. 6th 
1 10 
A. M. 
46 00 
—27 
1 50 
46 10 
—27 
2 30 
46 30 
*—27 
3 00 
48 50 
— 27 
3 25 
49 3° 
—261 
3 4° 
51 00 
—261 
cj 
3 5° 
52 30 
— z6 J 
3 55 
53 20 
—261 
0 . ^ 
t>0 
5 5 
54 00* 
—25 
• O *u • . 
4 6 10 
60 00 
—24 
0) 
• • ^ • • 
7 5 
52 30 
—23 
4-» 
7 53 
54 °° 
—23 
O 
• • £-» • • 
9 00 
57 20 
—23 
9 5 
57 00 
—23 
9 40 
58 10 + 
—23 
9 45 
57 3° 
—23 
10 00 
50 00 
—23 
10 30 
49 10 
—23 
10 50 
5i 30 
—23 
11 00 
53 20 
— 23 
11 5 
54 3° 
—23 
11 10 
55 3° 
—23 
11 15 
55 4° 
—23 
11 29 
54 30 
■ — 23 
11 31 
50 30 
—23 
Noon. 
49 10 
—23 
0 5 
P.M. 
47 00 
—23 
0 30 
46 55 
—23 
1 2 
46 4; 
—23 
1 27 
46 00 
—23 
l 55 
45 55 
— 23 
— 2 S3 
“J J J 
45 00 
—24 
Time that a ho- 
rizontal needle 
took to make 
60 vibrations, 
m. s. 
x 7 53>4 
l 7 57> 2 
l 7 54>5 
17 S3>8 
1 7 58 
17 55>2 
*7 54 
»7 55>9 
17 52,8 
17 53>7 
17 54>8 
17 55>9 
1 7 57»3 
17 56,8 
18 6 
18 9,5 
18 4 
18 9,2 
18 
18 
18 1 
18 1,5 
l 7 49>5 
»7 5° 
*7 54>7 
»7 54>9 
Winds. 
Westerly 
Light 
Clear and 
Fine 
Calm 
Easterly 
Light 
South 
moderate 
Ditto 
South 
Squally 
South 
Fresh 
S West'* 
Fresh 
Ditto 
Weather. 
Max. easterly 
variation. 
Fine and 
Clear 
Cloudy 
Hazy 
Hazy 
Hazy 
Overcast 
Thick 
with drift 
Clear 
Remarks, &c. 
5 rising S.W. by 
W. by compass. 
D W \ N. (com- 
pass). 
D W N W (com- 
pass). 
* Needle was ob- 
served to oscillate 
quickly in small arcs, 
and about this time 
also, rapid changes 
in the intervals of the 
times of vibrations of 
the horizontal needle 
took place. 
Max. westerly 
variation. 
Immediately after 
ll h 29“ A. M. the 
needle went rapidly 
towards the north, 
at which time, also, 
it was observed that 
a considerable in- 
crease in the hori- 
zontal intensity took 
place. 
