441 
Natural Philosophy. — ^Meteorology. 
Hence the mean temperature of tlie fyear is very nearly repre- 
sented by that of the months of April and October. 
The following Table shews the general atmospheric pheno- 
mena on a mean of 18 years from 1801 to 1819 : 
Days quite Days quite Varied Electrical 
clear. cloudy. Days. Rain. Show. Hail. Storms. Tempests. Fog^. 
38 6t 260 136 25 8 19 14 8 
The following Table contains the quantity of rain which fell 
on every square foot i 
In. 
Lines. 
In. Lines. 
1801, 
33 
8 
1811, 
21 
6 
' 1802, 
24 
0 
1812, 
21 
'o 
1803, 
28 
0 
1813, 
25 
1 
1804, 
- 30 
1 
1814, 
19 
1805, 
28 
7 
1815, 
19 
4 
1806, 
26 
6 
1816, 
31 
O/d 
1808, 
26 
0 
1817, 
26 
1809, 
25 
5 
1818, 
^ 21 
8/d 
1810, 
26 
0 
mean 
of these results is 
21.6 inches. 
The greatest heat 
o 
which took place was in 1783, on the 3d of August, when it was 
98°.9. The greatest cold was — 13% on the 26th December 
1798.— See Bibliotheque Univers. Nov. 1820, p. 168, — 173. 
23. Meteorological Table Icept at Kinfauns for 1820.. — The 
following Meteorological Table is extracted from the register 
kept at Kinfauns Castle, North Britain. — Lat. 56° 23' 30".— 
Height above the level of the sea 129 feet. 
Morning, 8 o’clock. 
Mean height of 
Evening, 10 o’clock. I 
Mean 
Depth 
of 
Rain. 
N° of days< 
1820, 
Mean height of 
Temp, 
by Six’s 
U 
s i 
Barom. 
Therm. 
Barom. 
Therm. 
Therm. 
In: 100 
3 § 
« 
£ 
January, 
29.763 
29.355 
29.776 
30.097 
30.532 
2.30 
14 
17 
February, 
29.883 
38.655 
29.875 
39.069 
40.310 
1.40 
12 
17 
March, 
29.761 
39.355 
29.762 
39.645 
41.451 
0.50 
10 
21 
April, 
29.794 
45.500 
29.795 
44.533 
47.333 
0.90 
6 
24 
May, 
29.632 
49.516 
29.602 
47.870 
50.741 
5.20 
19 
12 
June, 
29.838 
55.066 
29.837 
52.966 
55.533 
1.60 
13 
17 
July, 
29.844 
57.549 
29.788 
55.580 
59.322 
1.80 
9 
22 
August, 
29.621 
55.645 
29.627 
53.590 
56.806 
2.20 
13 
18 
September, 
29.792 
51.100 
29.777 
50.060 
52.633 
1.20 
12 
18 
October, 
29.499 
43.193 
29.480 
42.742 
44.419 
2.50 
12 
19 
November, 
29.749 
40.633 
29.764 
40.633 
42.133 
1.70 
11 
19 
December, 
29.877 
39.032 
29.883 
39.129 
39.483 
2.20 
16 
15 
Average of 
the Year, 
29.754 
45.383 
29.747 
44.659 
46.724 
23.50 
147 
219 
