METEOROLOGICAL JOURNAL FOR JULY AND AUGUST, 1840 . 
9 o’clock, A.M. 
3 o’clock, P.M. 
° U 
Ctf'g 
3 f 
External Thermometers. 
M rt 
A 
1840. 
Barometer 
uncorrected. 
Att. 
Barometer 
uncorrected. 
Att. 
■It? 
Fahrenheit. 
Self-registering 
m 
REMARKS. 
Ther. 
Flint 
Ther. 
idOjj 
9 A.M. 
3 P.M. 
Lowest 
Highest 
cg« 
Glass. 
Glass. 
Glass. 
Glass. 
a< 
ri h 
m” 
3 
W 1 
29.922 
29.916 
65.5 
29.846 
29.840 
66.0 
58 
07.1 
62.0 
65.2 
52.4 
68.2 
.133 
s 
Cloudy — light wind throughout the day. Evening, Overcast. 
T 2 
29.774 
29.768 
63.7 
29.728 
29.722 
65.9 
58 
05.8 
61.2 
63.7 
59.6 
66.6 
SE 
f A.M. Overcast — light rain — brisk wind, as also high wind through- 
1 out the night. P.M. Overcast— light wind. Ev. Slight rain. 
F 3 
29.540 
29.532 
64.4 
29.534 
29.530 
65.9 
58 
05.2 
58.8 
62.9 
56.5 
66.5 
.033 
W 
r A.M. Overcast— light rain and wind. P.M. Fine— light clouds and 
S 4 
29.878 
29.874 
81.5 
29.902 
29.896 
67.5 
54 
09.0 
61.3 
67.4 
53.7 
69.2 
.080 
w 
1 wind. Evening, Overcast — light wind. 
A.M. Fine— It. elds. & wind. P.M. Cldy.— brisk wind. Ev. The like. 
© 5 
29.732 
29.728 
72.0 
29.706 
29.700 
66.4 
56 
08.7 
63.3 
63.4 
58.7 
68.6 
w 
/ A.M. Cloudy — brisk wind throughout the night. P.M. Overcast— 
X brisk wind, with showers. Evening, Fine and starlight. 
M 6 
29.810 
29.804 
68.0 
29.686 
29.678 
66.9 
55 
07.5 
62.6 
63.8 
53.3 
75.3 
.016 
S var. 
Cloudy— brisk wind throughout the day. Ev. Light rain— high wind. 
T 7 
29.634 
29.630 
77.2 
29.706 
29.698 
65.8 
55 
07.5 
59.7 
64.6 
50.6 
71.7 
.138 
W 
f A.M. Dark heavy clouds— brisk wind, with light showers. P.M. 
X Fine — light clouds — brisk wind. Evening, Overcast. 
W 8 
29.822 
29.816 
64.8 
29.780 
29.772 
64.7 
55 
07.1 
61.2 
62.7 
53.8 
66.3 
.025 
SW 
/ A.M. Cloudy— light wind. P.M. Light rain and wind. Ev. Over- 
T 9 
29.878 
29.872 
69.0 
29.956 
29.948 
64.9 
53 
07.1 
59.4 
65.7 
51.3 
67.3 
.500 
NW 
C A.M. Overcast — light wind and showers. P.M. Cloudy— light 
\ wind. Evening, Fine and starlight. 
A.M. Cloudy— light wind. P.M. Fine— light clouds. Ev. Cloudy. 
F 10 
29.996 
29.988 
64.2 
29.960 
29.952 
63.9 
53 
05.9 
60.3 
62.0 
51.3 
67.7 
W 
S 11 
30.002 
29.998 
75.0 
29.976 
29.970 
65.2 
54 
08.3 
60.2 
62.3 
52.6 
66.8 
NW 
Fine— light clouds and wind throughout the day. Ev. The like. 
© 12 
30.012 
30.004 
72.4 
29.982 
29.974 
64.8 
53 
08.0 
58.3 
61.7 
52.2 
69.2 
NW 
A.M. Fine— It. clouds ic wind. P.M. Cloudy— It. wind. Ev. The like. 
M 13 
30.012 
30.004 
68.3 
30.088 
30.080 
62.9 
53 
05.9 
55.7 
59.5 
49.4 
62.7 
NW 
t A.M. Cloudy— light wind. P.M. Light rain and wind. Evening, 
1 Fine and moonlight. 
OT 14 
30.316 
30.310 
71.2 
30.294 
30.286 
63.7 
50 
07.1 
59.4 
68.7 
50.2 
70.5 
SW 
f Fine— light clouds and wind throughout the day. Evening, Fine 
W 15 
30.304 
30.300 
79.9 
30.220 
30.212 
65.8 
54 
09.0 
63.7 
72.3 
57.0 
77.2 
S 
/ Fine — nearly cloudless, with light breeze throughout the day. 
s- T 16 
30.152 
30.148 
70.7 
30.026 
30.018 
67.2 
56 
09.3 
66.5 
72.4 
56.0 
74.3 
S 
Cloudy — light breeze throughout the day. Evening, The like. 
d F 17 
29.998 
29.992 
75.7 
29.926 
29.918 
67.3 
55 
08.3 
62.7 
67.7 
52.8 
74.6 
SW var. 
Fine — light clouds and breeze throughout the day. Ev. Overcast. 
" S 18 
29.778 
29.772 
64.4 
29.784 
29.776 
66.2 
60 
05.1 
63.7 
65.7 
58.0 
69.7 
W 
/A.M. Lightly overcast— light breeze, with very fine rain. P.M. 
X Overcast. Evening, The like. [wind. 
Cloudy— light wind throughout the day. Ev. Overcast— It. rain — high 
© 19 
29.700 
29.694 
66.3 
29.622 
29.618 
68.2 
60 
06.1 
63.7 
69.0 
58.7 
68.6 
s 
M 20 
29.566 
29.560 
68.3 
29.548 
29.544 
67.3 
58 
07.1 
63.3 
65.8 
53.2 
70.0 
.091 
Svar. 
/ A.M. Cloudy— light wind, with occasional showers. P.M. Cloudy 
\ — brisk wind. Evening, Fine and moonlight. 
T 21 
29.630 
29.626 
76.2 
29.660 
29.652 
67.8 
59 
07.6 
63.7 
61.7 
55.3 
76.0 
.066 
W var. 
/ A.M. Fine — light clouds — brisk wind. P.M. Overcast— light rain. 
W 22 
29.820 
29.816 
66.2 
29.858 
29.850 
66.6 
56 
05.4 
61.4 
65.8 
52.7 
70.2 
.305 
W 
Cloudy — light wind throughout the day. Evening, Fine & starlight. 
T 23 
30.032 
30.024 
62.8 
30.056 
30.048 
64.0 
52 
06.2 
59.7 
60.2 
53.5 
72.4 
W 
/ A.M. Cloudy — very slight rain early. P.M. Cloudy — light wind. 
X Evening, Overcast. 
F 24 
30.066 
30.058 
65.0 
30.014 
30.006 
64.5 
54 
07.6 
61.7 
64.7 
55.0 
64.5 
s 
Cloudy — light wind throughout the day. Ev. Overcast— brisk wind. 
( A.M. Overcast— high wind— rain early — high wind throughout 
S 25 
29.814 
29.806 
62.6 
29.772 
29.764 
66.0 
58 
05.0 
60.3 
66.0 
58.5 
67.4 
.016 
s 
X the night. P.M. Slight rain. Evening, The like. 
© 26 
29.694 
29.688 
63.0 
29.696 
29.690 
64.0 
56 
04.4 
58.8 
60.0 
56.3 
70.2 
.291 
SE 
t cast— light rain. Evening, Overcast — light showers. 
M 27 
29.956 
29.950 
64.0 
29.958 
29.950 
65.0 
58 
06.9 
61.0 
70.2 
55.3 
62.4 
.105 
NW 
/ A.M. Overcast — light wind. P.M. Fine— light clouds and wind. 
[ Evening, Fine and starlight. 
©T 28 
30.084 
30.076 
63.2 
30.106 
30.098 
65.7 
57 
05.0 
61.7 
69.7 
55.6 
71.4 
S 
A.M. Overcast — It. wind. P.M. Fine— It. clouds & wind. Ev. Cloudy. 
W 29 
30.260 
30.256 
78.3 
30.234 
30.228 
67.7 
57 
08.4 
64.7 
69.6 
60.2 
71.8 
NW 
A.M. Fine— nearly cloudless — It. breeze. P.M. Cloudy. Ev. Overcast. 
T 30 
30.148 
30.140 
67.2 
30.098 
30.090 
68.6 
61 
05.6 
65.4 
70.9 
60.2 
72.0 
SSW 
Cloudy— light wind throughout the day. Ev. Overcast— slight rain. 
F 31 
34.210 
30.204 
72.5 
30.212 
30.204 
69.4 
60 
07.3 
62.3 
66.7 
58.7 
73.2 
.016 
NW 
Fine— light clouds & wind throughout the day. Ev. Fine & starlight. 
Sum. 
( 9 A.M. 3 P.M. 
MEAN . 
29.921 
20.915 
69.1 
29.901 
29.894 
66.0 
56 
06.9 
61.5 
65.5 
54.9 
69.8 
1.815 
Mean Barometer corrected < F. 29.817 . . 29.805 
t.C 29.810 .. 29.797 
S 1 
30.278 
30.272 
73.9 
30.216 
30.210 
68.0 
56 
07.2 
63.7 
71.5 
53.2 
72.6 
NW 
Fine— light clouds & wind throughout the day. Ev. Fine & starlight. 
G 2 
30.254 
30.250 
76.6 
30.200 
30.192 
69.3 
60 
08.0 
66.7 
78.0 
55.3 
79.0 
S 
Fine— It. clouds & breeze throughout the day. Ev. Fine& starlight. 
M 3 
30.244 
30.240 
82.9 
30.180 
30.172 
72.3 
62 
07.6 
70.0 
79.3 
61.0 
79.3 
s 
Fine — nearly cloudless throughout the day. Ev. Fine and starlight. 
T 4 
30.188 
30.184 
76.5 
30.132 
30.126 
72.0 
58 
07.0 
67.5 
77.2 
61.0 
80.0 
NW 
A.M. Light fog. P.M. Fine— light clouds. Evening, The like. 
W 5 
30.150 
30.196 
71.0 
30.098 
30.094 
71.0 
61 
05.5 
67.2 
71.7 
59.0 
68.5 
SE 
Fine— light clouds throughout the day. Evening, The like. 
T 6 
30.034 
30.030 
74.6 
29.992 
29.986 
72.0 
60 
06.8 
69.6 
76.6 
60.0 
73.0 
ENE 
Fine— light clouds throughout the day. Evening, The like, 
f A.M. Fine— light clouds and breeze. P.M. Lightly overcast — brisk 
X wind. Evening, The like. 
F 7 
30.020 
30.016 
74,0 
30.024 
30.020 
73.0 
61 
09.7 
71.3 
72.0 
64.0 
78.5 
NE 
S 8 
30.150 
30.144 
69.0 
30.148 
30.142 
71.0 
59 
05.0 
65.4 
73.0 
59.0 
76.0 
NNE 
Fine — It. clouds — brisk wind throughout the day. Ev. The like. 
/ A.M. Lightly overcast — light wind. P.M. Fine— light clouds and 
© 9 
30.292 
30.286 
70.0 
30.322 
30.318 
69.8 
54 
04,4 
60.2 
75.5 
52.4 
75.5 
N 
X wind. Evening, The like. 
M 10 
30.098 
30.094 
74.0 
29.984 
29.978 
72.0 
58 
07.3 
69.5 
76.5 
60.0 
77.0 
SW 
A.M. Overcast— It. fog. P.M. Fine— It. clouds. Ev. Lightly overcast. 
Til 
29.614 
29.610 
68.0 
29.574 
29.570 
69.5 
60 
03.0 
63.5 
69.0 
62.0 
79.7 
.058 
s 
A.M. Ovct. — It. wind. P.M. Fine — It. clouds. Ev. Lightly overcast. 
/ A.M. Fine— light clouds and wind. P.M. Lightly overcast. Even- 
W12 
29.654 
29.650 
71.0 
29.636 
29.632 
70.0 
57 
08.1 
65.5 
67.3 
57.0 
70.5 
.069 
wsw 
X ing, Overcast— heavy rain. 
f A.M. Overcast— light wind. P.M. Fine — light clouds — brisk wind. 
© T 13 
29.656 
29.652 
70.0 
29.624 
30.620 
68.5 
54 
07.0 
63.0 
67.6 
55.0 
70.0 
.027 
SW 
X Evening, The like. 
F 14 
29.530 
29.526 
66.0 
29.604 
29.600 
67.2 
54 
05.0 
61.0 
61.0 
56.0 
70.0 
.058 
w 
A.M. Overcast. P.M. Overcast— heavy showers. Evening, The like. 
/ A.M. Heavy clouds— brisk wind. P.M. Fine — light clouds, with 
h S 15 
29.818 
29.814 
65.0 
29.832 
29.828 
66.0 
54 
05.5 
61.2 
65.8 
53.5 
67.0 
.213 
SW var. 
X occasional showers. Evening, Overcast. 
p©16 
29.968 
29.962 
66.0 
29.904 
29.900 
66.0 
55 
06.5 
63.0 
68.2 
54.5 
67.5 
.072 
W 
/ Fine— light clouds nearly the whole of the day— heavy shower at 
l 3\, p.m. Evening, Fine— light clouds. 
p M 17 
29.206 
29.202 
63.0 
29.264 
29.260 
64,5 
59 
02.0 
59.8 
59.5 
58.0 
72.0 
.159 
SE var. 
/ A.M. Overcast — light rain— high wind. P.M. Fine — light clouds — 
l bri>k wind. Rainbow £ p. 5. Evening, Overcast. 
c T18 
29.374 
29.370 
61.5 
29.552 
29.548 
62.0 
54 
05.0 
59.5 
61.8 
52.5 
63.2 
.175 
W 
Overcast — brisk wind throughout the day, as also the evening. 
/Overcast — light rain & wind nearly throughout the day. Evening, 
W19 
29.712 
29.708 
60.0 
29.766 
29.762 
63.0 
57 
00.0 
57.0 
67.5 
57.0 
63.8 
.369 
SE 
Overcast. 
T20 
30.016 
30.012 
63.5 
30.002 
29.998 
66.0 
56 
05.5 
66.0 
72.8 
60.0 
69.0 
.061 
S 
Lightly overcast throughout the day. Evening, The like. 
/ A.M. Lightly overcast-light fog. P.M. Fine— light clouds and 
F21 
29.954 
29.950 
69.2 
29.894 
29.888 
69.0 
58 
06.4 
69.0 
75.5 
60.0 
70.5 
SE 
X breeze. Evening, Fine— light clouds. . 
/A.M. Overcast— light wind. P.M. Fine— light clouds and wind. 
S 22 
29.836 
29.832 
67.2 
29.824 
29.818 
69.0 
62 
02.2 
63.5 
71.6 
62.5 
77.8 
SW 
1 Evening, Lightly overcast. 
©23 
29.998 
29.994 
72.0 
29.982 
29.978 
69.0 
59 
05.5 
63.0 
70.5 
56.0 
72.5 
WSW 
/ A.M. Heavy clouds— light wind. P.M. Fine— lightclouds and wind. 
1 Evening, Dark heavy clouds— brisk wind. 
M24 
30.050 
30.044 
70.0 
29.996 
29.990 
68.6 
57 04,0 
62.5 
70.2 
56.0 
72.5 
SW 
A.M. Lightly overcast— It. wind. P.M. Fine— It. clouds. Ev.The like. 
T 25 
30.038 
30.034 
72.0 
30.000 
29.994 
68.2 
55 ! 06.5 
63.5 
70.0 
54.4 
73.5 
WSW 
A.M. Fine— lightclouds. P.M. Lightly overcast. Ev. Overcast. 
W26 
30.060 
30.054 
66.0 
30.070 
30.066 
67.3 
61 
03.5 
65.0 
68.5 
61.0 
73.0 
NW 
Overcast— light wind throughout the day. Evening, The like. 
© T 27 
F 28 
30.110 30.104 
30.060 ! 30.054 
65.0 
65.8 
30.052 
30.080 
30.048 
30.076 
67.2 
67.0 
59 
61 
03.0 
03.0 
61.5 
63.5 
69.5 
69.6 
56.7 
60.0 
70.8 
72.0 
W 
w 
Overcast throughout the day, as also the evening, 
f A.M. Lightly overcast. P.M. Fine-lt. clouds. Evening, Lightly 
S 29 
30.204 
30.198 
66.0 
30.200 
30.194 
67.0 
60 
01.1 
60.9 
67.2 
60.0 
72.0 
.011 
E 
r A.M. Overcast— light fog and haze. P.M. Lightly overcast. 
©30 
30.128 
30.124 
68.5 
30.086 
30.082 
69.0 
62 
04.5 
66.8 
77.5 
58.0 
69.0 
E 
A.M. Overcast— light fog. P.M- Fine— light clouds. Ev. Overcast. 
C A.M. Overcast-light wind. P.M. Fine— light clouds-bnsk wind. 
M 3 1 
30.184 
30.180 
66.8 
30.124 
30.120 
68.7 
59 
04.0 
63.0 
72.0 
60.0 
79.5 
NE 
X Evening, Cloudy. 
(9 A.M. 3 P.M. 
MEAN. 
29.964 
1 29.961 
69.2 
29.947 
29.942 
68.5 
58 
05.2 
64.3 
70.8 
57.9 
72.7 
1.272 
Mean Barometer corrected -j £• •• jffijjf 
