131 
for ascertaining the velocity of sound. 
Table VI. continued. 
Month. 
>> 
c « 
Q 
No. of 
Observations. 
Morning or 
Evening. 
Time. 
Height of 
Number of 
Wind. 
Weather. 
Barom. 
Therm. 
Hygrom. 
Beats, 
1 
Seconds. 
1820. 
h 
Inches, 
Dry. 
Sept. 
30 
2 
E 
8 
30,200 
87,0 
21 
3 D 3 
12,52 
Calm 
Clear ; lightning to SW. quarter. 
Oct. 
1 
— 
- 
- 
30,210 
86,5 
22 
30 , 3 
12,12 
Ditto 
Ditto ; ditto to, the north. 
2 
- 
- 
- 
30,230 
87,2 
26 
3 °, 7 
12,28 
Ditto 
Ditto. 
3 
- 
- 
- 
30,200 
85,2 
27 
30, 5 
12, 2 
Ditto 
Ditto. 
4 
1 
- 
- 
30,145 
85,2 
23 
3 °, 5 
12, 2 
SE 
Hazy. 
5 
I 
- 
- 
30,040 
84,8 
19 
3°, 0 
12, O 
Ditto 
Clear. 
6 
I 
- 
- 
30,050 
86,4 
18 
30, 0 
12, O 
SE by E 
Flying clouds. 
7 
- 
- 
- 
30,088 
85,8 
20 
29, 5 
II, 8 
SE 
Cloudy. 
8 
- 
- 
- 
30,100 
8 3,5 
21 
30, 0 
12, O 
Ditto 
Clear. 
9 
- 
- 
- 
30,075 
83,5 
l 9 
3°, 0 
12, O 
Ditto 
Ditto. 
10 
- 
- 
- 
30,075 
83,5 
20 
30, 5 
12, 2 
Ditto 
Ditto. 
1 1 
- 
- 
- 
30,075 
83,2 
l 9 
30, 0 
12, O 
Ditto 
Ditto. 
12 
- 
- 
- 
30,038 
83,5 
21 
3 ° 
12, O 
Ditto 
Ditto ; lightning to the north. 
>3 
- 
- 
- 
30,055 
84,5 
20,5 
30 
12 
NE by E 
Ditto. 
•4 
- 
- 
- 
30,082 
84,0 
21 
30, 5 
12, 2 
NE 
Ditto. 
*5 
- 
- 
- 
30,120 
83,2 
21 
3 D 5 
12, 6 
E by S 
Ditto. 
16 
- 
- 
- 
30,124 
84,4 
20,5 
3 D 0 
12, 4 
Light NE 
Rather hazy. 
18 
- 
- 
- 
30,038 
81,0 
* 5,5 
30, 5 
12, 2 
NE by N 
Cloudy. 
*9 
- 
- 
- 
30,050 
77,0 
6 
3 D 5 
12, 6 
NE 
Rain. 
Damp 
20 
E 
- 
- 
30,1 3 8 
77,0 
2 
3 1 , 0 
12, 4 
N 
Hazy. 
21 
- 
- 
- 
30,080 
80,0 
3 
30, 5 
12, 2 
NE by N 
Clear. 
22 
- 
- 
30,065 
81,0 
M 
32, 0 
12, 8 
NNW 
Cloudy ; thunder and lightning. 
24 
- 
- 
- 
30,088 
80,0 
l >5 
3D 0 
12, 4 
Calm 
Clear. 
Dry. 
2 5 
— 
- 
- 
30,112 
80,8 
7,5 
3 D S 
12, 6 
Ditto 
Ditto. 
26 
- 
- 
30,120 
78,5 
1 1 
32, 0 
12, 8 
Ditto 
Ditto. 
27 
2 
- 
- 
30,135 
80,2 
' 3>5 
3 D 25 
12, 5 
NE light 
Ditto. 
28 
1 
- 
- 
3°, 1 35 
82,0 
",5 
3 D 0 
12, 4 
NE 
Cloudy. 
29 
2 
— 
30,124 
81,5 
J Ij 5 
30,75 
12, 3 
NNE 
Ditto. 
3 1 
2 
— 
- 
30,085 
79,0 
4 
31 
12, 4 
NW 
Hazy and clear. 
Nov. 
1 
- 
- 
- 
30,118 
82,0 
4 
3 °, 5 
12, 2 
Calm 
Clear ; distant lightning in the SW. 
Dry. 
3 
- 
- 
- 
30,125 
82,5 
4 
3 °, 7 
12,28 
Ditto 
Ditto. 
4 
- 
- 
- 
30,110 
81,3 
6 
3 D 5 
12, 6 
Ditto 
Ditto. 
5 
- 
- 
- 
30,128 
82,0 
10 
3 D 0 
12, 4 
ENE 
Ditto. 
6 
• - 
- 
- 
30,145 
80,4 
IS 
30, 5 
12, 2 
E 
Ditto. 
7 
1 
M 
5 
30,170 
77,4 
1 1 
31, 0 
2, 4 
S byElight 
Ditto. 
2 
E 
8 
30,172 
79,0 
15 
30,75 
2, 3 
Calm 
Ditto. 
8 
1 
M 
5 
30,188 
76,0 
12 
30, 0 
2, O 
Ditto 
Ditto. 
2 
E 
8 
30,186 
80,4 
16 
30,25 
2, I 
Ditto 
Ditto. 
9 
2 
M 
5 
30,188 
80,8 
12,5 
31,25 
2, 5 
NNW 
Ditto. 
- 
E 
8 
30,188 
80,4 
13 
30, 5 
2, 2 
NNE 
Ditto. 
10 
- 
M 
5 
30,178 
7 9 ’ 6 
1 1 
30, 5 
2, 2 
NE 
Ditto. 
2 
E 
8 
30,178 
82,0 
",5 
30, 5 
2, 2 
Ditto 
Ditto. 
12 
2 
- 
- 
30,205 
81,5 
12,5 
30,75 
2, 3 
E by N 
Cloudy. 
"3 
- 
- 
— 
30,165 
78,4 
8 
30,75 
2, 3 
NE 
Ditto. 
H 
- 
- 
- 
30,165 
78,4 
D 5 
3 °, 5 
2, 2 
Ditto 
Clear. 
*5 
1 
- 
- 
30,130 
79,2 
3 
3°, 0 
2, O 
Ditto 
Cloudy. 
16 
2 
- 
- 
30,130 
82,0 
6 
30, 0 
2, O 
Ditto 
Clear. 
17 
- 
- 
- 
30,170 
81,0 
'5 
30, 5 
2, 2 
ENE 
[lather hazy. 
18 
~ 
30,120 
80,0 
S 
30, 0 
2, O 
NE 
Cloudy. 
