ABSTRACT of the METEOROLOGICAL JOURNAL kept on board His Majesty’s Ship Hecla, 
at Sea, during the Month of August, 1820. 
Day 
Temperature of Air 
in shade. 
Barometer. 
Prevailing Winds. 
Prevailing Weather. 
Maxi- 
mum. 
Mini- 
mum. 
Mean. 
Maxi. 
mum. 
Mini- 
mum. 
Mean. 
1 
+ 
o 
42 
4- 
o 
4-32 
+ 
o 
36.21 
inches. 
29.83 
inches. 
29.09 
inches. 
29.707 
W.N.W. 
1 
Fresh breezes and cloudy weather. 
2 
38 
32 
34.17 
29.84 
29.70 
29.793 
s.s.w. 
Light breezes and cloudy, snow at times. 
3 
39 
33 
35.92 
29.70 
29.57 
29.647 
Round the compass. 
Light breezes, thick hazy weather. 
4 
38.5 
33 
35.62 
29.69 
29.65 
29.673 
N.W.b.W. 
Fresh breezes and fine. 
5 
41 
30.5 
34.08 
29.79 
29.09 
29.737 
W.b.N. 
Light airs and cloudy. 
0 
36 
33 
33.96 
29.76 
29.59 
29.672 
E.S.E. 
Fresh breezes and hazy, sleet and snow. 
7 
38 
31 
34.92 
29.62 
29.56 
29.595 
Round the compass. 
Fresh breezes and fine, occasional squalls. 
8 
39 
33 
30.46 
29.61 
29.60 
29.618 
Ditto. 
Light variable airs, cloudy with rain. 
9 
40 
31 
34.79 
29.00 
29.40 
29.513 
West. 
Light variable airs — hazy. 
10 
34 
30 
31.90 
29.60 
29.51 
29.575 
W.b.N. 
Moderate and hazy, small snow. 
11 
33 
30 
31.29 
29.64 
29.53 
29.592 
E.S.E. 
Light breezes and foggy, snow at times. 
12 
38 
30.5 
34.29 
29.70 
29.48 
29.542 
E.N.E. 
Strong breezes and squally weather. 
13 
45 
31 
36.92 
29.87 
29.70 
29.828 
Round the compass. 
Light breezes and cloudy. 
14 
38 
27 
33.22 
29.81 
29.71 
29.762 
West. 
Light airs and hazy. 
15 
37 
29 
32.33 
29.85 
29.76 
29.805 
W.N.W. 
Moderate and hazy, with snow. 
10 
34 
29 
32.42 
30.01 
29.83 
29.948 
W.N.W. 
Moderate and fine. 
17 
36 
28 
31.83 
30.03 
29.96 
30.007 
w.s.w. 
Light airs, and fine clear weather. 
18 
36 
30 
33.08 
29.90 
29.79 
29.843 
Calm. 
Cloudy. 
19 
40 
28 
33.90 
29.87 
29.79 
29.820 
West. 
Light breezes and cloudy. 
20 
36 
27 
31.67 
29.91 
29.85 
29.888 
W r est. 
Light breezes, foggy, and cloudy. 
21 
37 
26 
30.92 
29.84 
29.69 
29.757 
( A.M. Calm. > 
l P.M. East. 5 
Light breezes and foggy, with snow. 
22 
37.5 
29 
31.79 
29.69 
29.64 
29.667 
West. 
Light airs and hazy, snow. 
23 
35 
30 
31.58 
29.79 
29.71 
29.745 
West. 
Moderate and cloudy. 
24 
34 
30 
31.79 
29.83 
29.71 
29.793 
North. 
Light airs and cloudy. 
25 
38 
27 
32.29 
29.85 
29.83 
29.842 
Round the compass. 
Ditto ditto. 
26 
34 
25.5 
28.92 
29.81 
29.63 
29.737 
N.N.W. 
Fresh breezes and cloudy. 
27 
31 
22.5 
27.83 
29.92 
29.72 
29.848 
C A.M. North. > 
l P.M. West. S 
Light breezes and cloudy. 
28 
31 
22 
28.12 
29.86 
29.72 
29.783 
W.S.W. 
Fresh breezes and hazy. 
29 
30 
28 
29.00 
29.66 
29.61 
29.645 
N.W.b.W. 
Moderate and hazy. 
30 
33 
28 
30.00 
30.00 
29.62 
29.638 
N.W. 
Moderate and cloudy weather. 
31 
34 
29 
31.75 
29.75 
29.63 
29.678 
W.S.W. 
Fresh breezes and cloudy weather. 
+ 45 
+ 22 
+ 32.68 
30.03 
29.46 
29.734 
