I 
ABSTRACT of the METEOROLOGICAL JOURNAL kept on board His Majesty’s Ship Hecla, at Sea, 
during the Month of September, 1820. 
Day 
Temperature of A.ir 
in shade. 
Sea Water at the 
surface. 
Barometer. 
Prevailing Winds. 
Prevailing Weather. 
Masi- 
muiu. 
Mini- 
mum. 
Mean. 
Tempe- 
rature. 
Specific 
Gravity. 
Tempera- 
ture when 
weighed. 
Maxi- 
mum. 
Mini- 
mum. 
Mean, 
1 
-h 
O 
3S 
+ 
o 
30 
+ 
o 
31.67 
o 
80.T 
1 .0246 
49 
inches. 
29.8S 
inches. 
29,75 
inches. 
29.802 
N. Westerly. 
Moderate breezes and cloudy. 
2 
33 
31 
31.62 
32.4 
1.0243 
55 
29.89 
29.82 
29.860 
N.N.W. 
Light breezes and cloudy. 
3 
. 38 
32 
33.92 
33.9 
1.0242 
57 
29.83 
29.73 
29.800 
f N.W. ? 
t Southerly.' 5 
Ditto ditto. 
4 
86 
31 
33.54 
33.7 
1.0240 
57 
29.71 
29.63 
29.682 
S.E. 
Ditto ditto. 
5 
41 
31 
86.12 
33.9 
1.0233 
43 
29.69 
29.63 
29.655 
f A.M. Westerly. ? 
1 P.M. N.E. 5 
Moderate and cloudy. 
6 
32 . 
29 
30.54 
32.7 
29.76 
29.64 
29.704 
N.N.E. 
Light breezes and cloudy, with snow. 
7 , 
36 
29 
81.67 
32.7 
1.0228 
53 
29.73 
29.62 
29.670 
w.s.w. 
Light breezes and cloudy. 
8 
32 
26 
28.71 
32.7 
1.0223 
54 
29.61 
29.56 
29.580 
South. 
Ditto ditto. 
9 
34 
27 
31.37 
32.2^ 
1.0227 
51 
29.76 
29.59 
29.695 
W.S.W, 
Light breezes and fine. 
10 
35 
31 
32.58 ' 
32 
1.0236 
51 
29.81 
29.73 
29.775 
S.W. 
Strong breezes and squally. 
11 
35 
30 
32.67 
31.5 
1.0202 
53 
29.69 
29.50 
29.588 
Southerly, 
Light breezes and cloudy. 
12 
36 
26 
31.17 
31.6 
1.0174 
60 
29.52 
29.47 
29.500 
Round the Compass.' 
Light airs and fine clear weather. 
13 
33 
29 
31.29 
31.5 
1.0170 
54 
29.73 
29.62 
29.680 
S.E. 
Light breezes and cloudy. 
14 
35.5 
30 
31.96 
31.5 
1.0225 
55 
29.82 
29.73 
29.778 
S.E. b. E. 
Ditto ditto. 
15 
35 
24 
31.00 
30 
1.0243 
54 
29.74 
29.59 
29.665 
S.S.E, 
Moderate. Snow. 
16 
36 
23 
30.58 
30.6 
1.0243 
55 
29.72 
29.50 
29.622 
E.S.E, 
Light breezes and foggy. 
17 
36 
28 
31.46 
30.5 
1.0242 
57 
29.56 
29.49 
29.534 
Westerly. 
Light breezes and hazy. 
18 
32 
26 
29.21 
30.5 
1.0243 
56 
29.48 
29.25 
29.358 
5 N.N.E. 7 
t N.N.W. S 
Ditto ditto. 
19 
33 
28 
31.12 
30.9 
1.0249 
54 
29.49 
29.32 
29.412 
N. E. by E. 
Light breezes and hazy. Snow. 
20 
31.5 
29 
30.12 
32.1 
1.0248 
55 
29.62 
29.50 
29.577 
W.N.W, 
Ditto ditto. ditto. 
21 
32 
29 
30.58 
32.8 
29.60 
29.55 
29.572 
N.W. 
f A.M. Moderate with snow. P.M. Light 
( breezes and hazy with snow. 
22 
34 
29 
30.96 
32.1 
1.0255 
49 
29.67 
29.55 
29.565 
Easterly. 
Light breezes and cloudy. 
23 
34 
30 
31.42 
31.7 
1.0250 
61 
29.72 
29.49 
29.652 
C -N.N.E, 1 
1 Southerly. ) 
Light airs to fresh gales, cloudy. 
24 
36 
30 
32.50 
32 
1.0250 
52 
29.77 
29.46 
29.642 
S.E, b.S. 
Moderate and thick foggy weather. 
25 
35 
30.5 
32.67 
33 
1.0261 
51 
29.50 
29.33 
29.448 
Southerly. 
Moderate and foggy weather. Snow. 
26 
31 
28 
30.50 
83.5 
1.0254 
50 
29.35 
29.05 
29.228 
C Calm. > 
1 N. b. W. 5 
Calm and hazy to strong gales and hazy. 
27 
32 
30 
31.29 
36.2 
1.0259 
61 
29.38 
29.00 
29.225 
N.N.W. 
Fresh gales and squally. Snow. 
28 
34 
31 
32.83 
39.4 
1.0266 
52 
29.56 
29.44 
29.500 
N.W. b. W. 
Moderate and cloudy. 
29 
38 
32 
34.83 
40.8 
29.66 
29.57 
29.618 
N.W. b. W. 
Fresh gales and squally to calm. Snow. 
30 
43 
34 
36.79 
41.5 
1.0273 
54 
29.49 
29,31 
29.417 
N.E. 
Light airs and cloudy to fresh gales and squally. 
43 
26 
31.87 
33.02 
29.89 
29.00 
29.590 
2R 
