of intensity in the dipping and horizontal needles , &c. 181 
a dipping needle. In the first column of each part, is inserted 
the day of the month ; in the second, the hour and minute at 
which the observations were commenced ; the third column 
of each part, contains the mean time in seconds taken by the 
needle in its different positions, to perform one hundred vibra- 
tions ; and in the fourth, is inserted the temperature of the 
needle at the time of observation. 
1st Part, 
Horizontal Needle. 
2d Part, 
Dipping Needle. 
Date. 
Time of Com- 
mencement. 
Mean time in 
seconds, of per- 
forming 100 
■vibrations. 
Temp. 
Fall 1 . 
Date. 
Time of Com- 
mencement. 
Mean time in 
seconds, of per- 
forming 100 
vibrations. 
Temp. 
Fah 1 . 
1825. 
h. 
m. 
9. 
0 
1825. 
h. 
m. 
9. 
Feb. 1 2th 
A.M. 
6 
35 
2128,6 
— 
17 
Feb. 1 2th 
A.M. 
1 1 
58 
4°5>4 
— 
'H 
10 
54 
2127,6 
— 
17 
13th 
P.M. 
O 
3° 
4°5»7 
— 
*7i 
13th 
P. M. 
i 
32 
2079,9 
— 
>7 
P.M. 
3 
41 
410,0 
— 
»7i 
P. M. 
1 
42 
2103,1 
— 
*7 
14th 
a.m. 
10 
34 
408,0 
— 
l 9$ 
14th 
a.m. 
2 
54 
2152,5 
— 
, 7i 
P.M. 
0 
12 
406,5 
— 
20 
11 
21 
2088,2 
— 
20 
8 
33 
408,4 
— 
22 
P. M. 
1 
*4 
2067,7 
— 
20 
10 
00 
409,0 
— 
2 1 3 
9 
00 
2086,0 
— • 
22 
A. M. 
1 1 
12 
408,7 
— 
2I i 
15 th 
A.M. 
0 
41 
2107,0 
— 
22 
15 th 
1 
34 
411,1 
— 
22 
10 
48 
21 15,5 
— 
ZI 
10 
32 
410,0 
— 
21 
P. M. 
8 
44 
2064,2 
— 
23 
P. M. 
1 1 
35 
409,6 
— 
21 
1 6th 
A.M. 
10 
29 
2071,0 
— 
2 3 
8 
9 
409,2 
— 
2 3 
11 
4 
2077,4 
— 
2 7 
9 
43 
408,7 
— 
23 
17th 
A.M. 
10' 
18 
2071,0 
— 
22 
A.M. 
1 1 
15 
409,2 
— 
22 
1 1 
12 
2058,2 
— 
21 
1 6 th 
10 
38 
409,9 
— 
28 
19th 
P. M. 
0 
2 9 
2079,5 
— 
20 
17th 
A.M. 
11 
46 
409,1 
■— 
27 
A.M. 
10 
18 
2092,2 
— 
22J 
9 
42 
409,0 
— 
22 
P.M. 
1 1 
54 
408,5 
— 
20 
1 
10 
409,0 
— 
20g 
19th 
A.M. 
10 
00 
408,5 
— ■ 
23 
10 
58 
408,1 

=3SB 
22 
* Mean . 
* • 
• 
2092,33 
— 
20 \ 
* Mean . 
• • 
• 
408,65 
— 
2I| 
* The dip of the needle resulting from these elements is 87° 48',8 N. 
