1 90 Colonel Be^ufoy on the Variation of the Needle, 
MONTHLY METEOROLOGICAL TABLE, containing the Mean Height of the Baro- 
meter, Thermometer, and Hygrometer, (De Luc’s), at the hour of the Morning, Noon, 
and Evening Observations of the Magnetic Needle ; also the prevailing Winds, Quantity 
of Rain, Evaporation, and the Mean Heat of each Month, by a regular series of obser- 
vations with a Six’s Thermometer. 
Month. 
Barome- 
ter. 
Barome- 
Iter. 
Barome- 
ter. 
Thermo- 
meter. 
Thermo- 
meter. 
Thermo- 
meter. 
1 Hygro- 
meter. 
Hygi-o- 
meter. 
Hygro- 
meter. 
Winds. 
Rain. 
Evapora- 
tion. 
1 Mean 
Temper, j 
1817, 
April, 
Inches. 
29.770 
Inches. 
29.726 
Inches. 
29.762 
42.7 
48.8 
45.0 
61.2 
48.5 
50.0 
NE 
Inches. 
Inches. 
o 
May, 
29.286 
29.269 
29.286 
50.1 
57.4 
50.2 
58.2 
52.9 
53.6 
SW 
- - - 
- i - 
- _ 
June, 
29.410 
29.422 
29.439 
61.1 
68.3 
62.0 
60.8 
48.7 
52.3 
sw 
- - - 
_ - _ 
. - 
July, 
29.368 
29.612 
29.349 
56.7 
65.3 
59.4 
64.3 
55.2 
59.2 
SW 
i - - 
- - - 
59.3 
Aug. 
29.310 
29.320 
29.322 
57.3 
63.0 
59.1 
66.9 
54,6 
57.1 
sw 
- . - 
_ - - 
58.9 
Sept. 
29.516 
29.522 
29;489 
56.4 
62.5 
58.0 
70.9 
54.7 
60.9 
NE 
- - - 
. - - 
58.1 
Oct. 
29.541 
29.475 
_ - - 
43 
49.6 
65.4 
56.6 
_ _ 
NE 
— 
- _ - 
44.6 
Nov. 
29.518 
29.501 
- - - 
45.7 
5r.2 
- - 
78.0 
68.0 
- - 
NE 
- . - 
. . - 
47.7 
Dec. 
29.130 
29.121 
35.4 
38.0 
78.2 
66.0 
- - 
SW 
- , 
_ - - 
35.9 
1818, 
Jan. 
29.227 
29.387 
- i, - 
37.6 
41.2 
- i 
75.1 
68.8 
sw 
_ - - 
- - - 
37.9 
Feb. 
29.272 
29.286 
- - i 
32.8 
37.3 
- _ 
74.3 
65.9 
.1 _ 
sw 
- - - 
- - . 
34.9 
March, 
29.154 
29.132 
29.427 
37.6 
43.6 
39.8 
66.1 
57.2 
51.4 
sw 
2.330 
2.570 
39.7 
April, 
29.241 
29.294 
29.322 
44.5 
49.9 
46.1 
62.9 
51.7 
55.0 
NE 
3.750 
2.590 
45.8 
May, 
29.393 
29.463 
29.423 
51.7 
59.0 
53.4 
52.2 
42.1 
47.1 
NE 
2.455 
3.770 
52.8 
June, 
29.597 
29.586 
29.610 
62.8 
71.5 
65.2 
43.1 
32.7 
37.5 
SW 
0.330 
6.980 
64.0 
July, 
29.629 
29.621 
29.625 
65.8 
73.3 
68.1 
43.8 
33.8 
37.7 
NW 
0.670 
7.015 
67.1 
Aug. 
29.625 
29.605 
29.611 
62.3 
68.8 
63.1 
41.3 
30.4 
32.2 
NW 
0.491 
7.030 
62.5 
Sept. 
29.346 
29.326 
29.357 
54.9 
62.2 
58.1 
61.1 
44.6 
51.1 
SW 
3.120 
3.400 
57.7 
Oct, 
29.411 
29.391 

51.6 
57.9 
. _ 
70.4 
57.1 
_ _ 
SW 
1.384 
1.970 
53.8 
Nov. 
29.394 
29.357 
- - - 
46.5 
51.4 
77.7 
65.2 
_ _ 
SW 
2.412 
1.080 
46.7 
Dec. 
29.611 
29.607 
_ - - 
35.6 
39.8 
- - 
79.5 
65.5 
- _ 
NE 
1.215 
0.530 
37.0 
1819, 
Jan. 
29.670 
29.301 

36.8 
42.3 
81.5 
63.5 
SW 
1.906 
1.400 
38.9 
Feb. 
29.172 
29.166 

38.2 
42.6 
_ _ 
72.2 
55.9 
- _ 
NW 
2.828 
1.430 
38.8 
March, 
29.386 
29.682 
29.333 
42 
46.8 
46.3 
65.3 
52.2 
51.4 
NW 
1.153 
2.680 
41.6 
April, 
29.321 
29.332 
29.329 
49 
52.7 
48.7 
53.5 
40.6 
49.6 
SW 
2.468 
3.440 
48.5 
May, 
29.440 
29.435 
29.489 
54.8 
61.1 
55.5 
48.9 
37.3 
44.2 
SE 
3.063 
4.530 
55.3 
June, 
29.462 
29.452 
29.456 
57.4 
62.2 
57.3 
53.5 
44.6 
49.8 
SW 
1.950 
4.250 
57.2 
July, 
29.233 
29.539 
29.556 
62.1 
68.7 
63.0 
57.0 
44.9 
52.2 
NE 
1.514 
4.930 
64,4 
Aug. 
29.599 
29.5T9 
29.565 
62.8 
70.9 
65.1 
66.9 
48.6 
60.0 
NE 
2.520- 
4.720 
65.5 
Sept. 
29.511 
29.518 
29.519 
56.7 
62.9 
58.1 
79.2 
64.7 
67.5 
SW 
3.213 
3.550 
57.9 
Oct, 
29.370 
29.362 
- _ _ 
47.7 
53.1 
- > 
79,9 
68.9 
- _ 
NW 
1.610 
2.280 
49.1 
Nov. 
29.253 
29.233 
_ - - 
37.4 
42.0 
.. _ 
79.9 
72.8 
NW 
1.761 
1.230 
39.8 
Dec. 
29.243 
29.288 
■ - - 
32.4 
36.4 
82.9 
75.5 
> - 
SW 
2.429 
0.710 
34.8 
1820, 
Jan. 
29.372 
29.402 
- _ _ 
28.3 
33.1 
80.2 
73.9 
SW 
1.020 
0.360 
31.3 
Feb. 
29.518 
29.479 
_ - - 
30.4 
38.7 
- - 
82.9 
74.1 
NE 
1.143 
0.765 
35.6 
March, 
29.408 
29.439 
29.295 
37.6 
44.5 
46.3 
74.2 
63.6 
67.4 
NW 
0.246 
4.170 
40.7 
April, 
29.470 
29.474 
29.517 
47.9 
55.6 
51.6 
67.5 
59.3 
63.3 
SW 
1.505 
3.750 
49.5 
May, 
29.375 
29.352 
29.339 
51.9 
58.8 
53.8 
66.4 
58.6 
63.4 
sw 
3.383 
4.270 
53.4 
June, 
29.490 
29.438 
29.393 
57.1 
63.4 
58.3 
69.8 
53.8 
64.5 
NW 
1.724 
4.391 
58.1 
July, 
29.519 
29.530 
29.458 
60.3 
65-7 
60.5 
69.1 
60.1 
67.5 
NW 
1.936 
3.950 
60.7 
Aug. 
29.461 
29.468 
29.443 
59.3 
65.6 
60.1 
70.5 
59.8 
63.4 
SW 
1.992 
4.820 
61.1 
Sept. 
29.550 
29.543 
29.595 
53.8 
61.1 
56.3 
71.2 
57.9 
61.1 
sw 
2.282 
3.400 
55.3 
Oct. 
29.200 
29.166 

45.6 
51.4 
71.8 
61.9 
NE 
2.538 
2.500 
45.5 
Nov. 
29.371 
29.371 
— 
39.7 
44.0 
-- 
76.7 
70.0 
NE 
1.223 
0.853 
41.6 
