for ascertaining the velocity of sound. 115 
Table I. continued. 
Month. 
Q 
No. of 
Observations. 
Morning or 
Evening. 
Time. | 
Height of 
Number of 
Wind. 
Weather. 
Barom. 
Therm. 
Hygrom. 
13 
<u 
CQ 
Seconds. 
1820. 
h. 
Inches. 
Dry. 
Nov. 
2 4 
I 
E 
6 
30,1 28 
80,7 
J 5 
68, 5 
27,4 
NE 
Clear ; sound very indistinct. 
27 
1 
- 
- 
3 °> 135 
73,4 
*4 
68 
27,2 
NE 
Clear. 
Dec. 
4 
2 
— 
_ 
30,015 
75,6 
9,5 
65,25 
26,1 
SW by N 
Clear. 
5 
2 
- 
- 
30,068 
79,4 
3 ,o 
65, 0 
26,0 
SE 
Clear. 
6 
2 
- 
— 
3°,°75 
81,0 
6,5 
66, 5 
26,6 
E 
Clear. 
7 
2 
- 
— 
30,085 
80,4 
3,5 
67,25 
26,9 
NNE 
Clear ; sound very indistinct. 
Dry 
10 
2 
- 
- 
30,106 
79,3 
7 ,° 
68,25 
27,3 
ENE 
Hazy. 
12 
2 
- 
- 
30,125 
78,8 
11,5 
68 
27,2 
N 
Cloudy. 
1 3 
1 
— 
- 
30,090 
79 >° 
°,5 
67, 5 
27,0 
NE 
Cloudy. 
14 
2 
M 
5 
30,074 
77 ,o 
i,S 
67,25 
26,9 
NE 
Clear. 
J 5 
2 
E 
6 
30,108 
8i,o 
4 
67 
26,8 
E by N 
Cloudy. 
16 
1 
- 
- 
30,120 
81,0 
9 
67, 5 
27,0 
NE 
Clear. 
17 
1 
M 
5 
30,122 
77,2 
2 
66, 5 
26,0 
NW light 
Ditto. 
1 
E 
6 
30, 1 12 
80,8 
7 
68, 5 
27,4 
NE 
Ditto. 
18 
1 
M 
5 
30,120 
77 ,o 
5 
68 
27,2 
NW 
Clear and dew. 
*9 
1 
E 
6 
30,1 10 
79,5 
16 
67, 5 
27,0 
NE 
Hazy. 
Damp 
26 
2 
- 
- 
30,028 
8 1,6 
9 
66,25 
26,5 
NE 
Clear. 
1821. 
27 
r 
- 
- 
30,038 
81,5 
6 
6 7 
26,8 
ENE 
Hazy. 
Jan. 
8 
i 
- 
- 
30,165 
76,2 
7 
68 
27,2 
NE light 
Cloudy. 
9 
2 
- 
- 
30,200 
79,2 
2 
68, 5 
27,4 
NE 
Clear. 
Dry 
10 
2 
- 
- 
OJ 
O 
O 
OO 
79 ,o 
1 
67, 0 
26,8 
NE 
Ditto. 
12 
2 
- 
- 
30,220 
82,0 
9 
67, 5 
27,0 
Calm 
Ditto. 
16 
1 
M 
3 
30.155 
76,2 
6 
66, 5 
26,6 
Calm 
Ditto. 
2 
E 
6 
30,155 
80,0 
8,5 
67, 0 
26,8 
Calm 
Hazy. 
*7 
1 
M 
5 
30,175 
75 ,° 
7,5 
66, 0 
26,4 
Calm 
Clear. 
*9 
2 
E 
6 
30,155 
80,0 
2 
68, 5 
27,3 
East 
Cloudy. 
21 
1 
M 
3 
30,138 
76,5 
5,5 
67, 0 
26,8 
NE 
Clear. 
2 
E 
6 
3 °’i 3 8 
79,5 
12 
67, 5 
27,0 
E 
Ditto. 
22 
1 
- 
- 
30,130 
80,5 
9 
66, 5 
26,6 
NE 
Ditto. 
23 
2 
- 
- 
30,110 
80,6 
1 1 »5 
66,75 
26,7 
NE 
Ditto. 
24 
2 
- 
- 
30,055 
80,0 
12 
66,75 
26,7 
Calm 
Ditto. 
25 
2 
- 
- 
30,088 
80,5 
10 
67,75 
26,7 
Calm 
Ditto. 
26 
2 
- - 
- 
30,100 
79 ,o 
10 
68, 5 
27,4 
NE 
Cloudy. 
28 
1 
- 
- 
30,050 
80,5 
9-5 
67 
26,8 
Calm 
Clear. 
29 
1 
M 
3 
30,058 
75,2 
8,5 
66, 5 
26,6 
Calm 
Ditto. 
2 
E 
6 
30,048 
81,0 
9>5 
66,25 
26,4 
Calm 
Clear. 
30 
1 
- 
- 
30,048 
81,0 
9,5 
66,25 
26,5 
Calm 
Ditto. 
Feb. 
1 
1 
M 
3 
30,000 
74,5 
8,5 
65 
26, C 
Calm 
Hazy ; dew 
2 
1 
E 
6 
30,062 
8 1,0 
13 
67, 5 
27,0 
NE 
Clear. 
3 
2 
- 
- 
30,105 
80,5 
13 
6 7 
26,8 
E 
Clear ; sound indistinct. 
4 
1 
- 
- 
3 °,H 8 
80,0 
12 
68 
27,2 
NE 
Ditto. 
1 
M 
3 
30,1 10 
76,2 
1 1 
68 
27,2 
NE 
Ditto. 
5 
1 
E 
6 
30,130 
80,6 
l 3 
67 
26,8 
Light NE 
Ditto. 
