for ascertaining the velocity of sound. 
1 35 
TABLE VII. 
Experiments selected from Table VI. the air having been calm. 
Month. 
> 
rt 
G 
No. of 
Observations. 
Morning or 
Evening. 
| Time. 1 
Height of 
Number of 
Weather. 
Barom. 
| Therm. 
Hygrom. 
Beats. 
Seconds. 
1820. 
h. 
Inches. 
O 
Dry. 
// 
July. 
22 
I 
E 
8 
29,925 
80,4 
15 
3 ° 
12 
Cloudy. 
23 
- 
- 
- 
29,926 
82,0 
15 
31 
12, 4 
Ditto. 
28 
- 
- 
— 
30,025 
8l,0 
9 
3 ° 
12, 0 
Ditto. 
Aug. 
2 
- 
- 
— 
30,000 
81,0 
5 
3° 
12, O 
Ditto. 
5 
I 
M 
S 
30,030 
80,0 
7 
29 
I I, 6 
Ditto. 
7 
- 
E 
8 
30,015 
81,0 
1 1 
3° 
12, O 
Ditto. 
13 
2 
M 
S 
30,000 
81,4 
7 
3°> 5 
12, 2 
Ditto. [ning. 
14 
2 
E 
8 
29,950 
84,0 
1 1 
2 9> 5 
? I, 8 
Ditto ; some rain, with light- 
Sept. 
6 
2 
- 
- 
29,970 
82,6 
l 9 
3 D 0 
12, 4 
Thin haze. 
18 
I 
- 
- 
30,010 
83.0 
31, 0 
12, 4 
Clear. 
20 
2 
- 
- 
30,020 
82,0 
»5 
3 1 * 0 
12, 4 
Cloudy. 
23 
2 
- 
- 
30,050 
86,6 
21 
3 °* S 
12, 2 
Thick haze. 
24 
2 
- 
- 
30,088 
8 5,5 
26 
3 °> 5 
12, 2 
Clear. 
30 
- 
- 
- 
30,200 
87,0 
21 
3 D 3 
12,56 
Clear ; lightning SW. quarter. 
Oct. 
1 
- 
- 
— 
20,210 
86,5 
22 
3 °» 3 
I2,l6 
Clear ; lightning to the north. 
2 
- 
- 
- 
30,230 
87,2 
26 
3 °> 7 
12,28 
Clear. 
3 
- 
- 
- 
30,200 
85,2 
27 
3 °> 5 
12, 2 
Ditto. 
Damp 
24 
1 
- 
- 
30,088 
80,0 
l >5 
3 D 0 
12, 4 
Ditto. 
Dry. 
25 
- 
- 
- 
30,1 12 
80,8 
1’S 
3 D S 
12, 6 
Ditto. 
26 
- 
- 
- 
30,120 
7 8 >5 
1 1 
32, 0 
12, 8 
Ditto. 
Damp 
[SW. 
Nov. 
1 
2 
- 
- 
30,118 
82,0 
4 
3 °» 5 
12, 2 
Clear ; distant lightning in the 
Dry. 
3 
2 
- 
- 
30,125 
82,5 
4 
30,75 
12, 3 
Clear. 
4 
2 
- 
- 
30,1 10 
81,3 
6 
3 D 5 
12, 6 
Ditto. 
7 
2 
- 
- 
3 °, I 7 2 
79>° 
! S 
30,75 
12, 3 
Ditto. 
8 
1 
M 
5 
30,188 
76,0 
12 
30 
12, O 
Ditto. 
2 
E 
8 
30,186 
80,4 
16 
3°> 2 S 
12, 1 
Ditto. 
Damp 
Dec. 
5 
2 
- 
- 
30,100 
11 ’ 2 
4 
3 D 0 
12, 4 
Ditto. 
1821. 
Jan. 
9 
- 
- . 
- 
30,205 
11’ 5 
I 
3 D 0 
12, 4 
Ditto. 
10 
- 
M 
5 
30,200 
IS ’ 2 
D 5 
3D 5 
12, 6 
Ditto. 
Dry. 
1 
E 
8 
30,188 
11 ’ 2 
3 
3°>75 
12, 3 
Ditto. 
*4 
2 
- 
■ 
30,200 
ll’S 
8,5 
3 i 
12, 4 
Hazy. 
16 
2 
M 
5 
3 °>i 55 
76,2 
6 
3 °> 5 
12, 2 
Clear. 
1 
E 
8 
30,160 
ll’S 
9 
30,75 
12, 3 
Ditto. 
