219 
Na lure l Philosophy — —Meteorology, 
the cloud. This phenomenon continued at least for about a 
quarter of an hour. A gentle breeze from the north carried the 
cloud in which it appeared slowly along ; the figures became 
less and less distinct, and at last vanished. 
METEOROLOGY. 
9. Mean Temperature of Leadhills for Ten years. — Eleva- 
tion 1280 feet above the level of the sea. Average of observa- 
tions of the temperature made twice a-day ; one at six in the 
morning, and another at one in the afternoon^ at the Scots 
Mining Company’s counting-house. 
1811. 
1812. 
1813. 
1814. 
1815. 
1816. 
1817. 
1818. 
1819. 
1820. 
Jan. 
30° 
33° 
32 A° 
234° 
30* 
35 l >° 
36° 
344° 
354° 
294° 
Feb. 
34^ 
35 
364 
32 
39 
32 
374 
32 
34 
35b 
Mar. 
41 
33 
40 
364 
39 
344 
36 
35 
42 
38 
April, 
464 
374 
42 
474 
43 
40 
42 
40 
44 
47 
May, 
514 
484 
494 
46 
53 
484 
47 
52 
504 
50 
June, 
56 
53 
554 
52 
58 
54 
57 
60 
53 
54 
July, 
58 
55 
574 
58 
56 
54 
55 
604 
59 
59 
Aug. 
53 
54 
54 
55 
55| 
53 
53 
55 
61 4 
554 
Sept. 
52 
51 
484 
514 
51 
484 
51 
51 
504 
50 
Oct. 
48 
414 
42 
44 
45 
47 
42 
49 
41 
41 
Nov. 
41 
36 
36 
354 
32 1 
354 
43 
45 
34 
364 
Dec. 
314 
32 
37 
324 
33 
324 
32 
36 
29| 
37 
42.25 
42.46 
| 44.25 
42.83 
44.42 
42.92 
44.29 
45.83 
44.54 
44.42 
Mean Temperature for Ten Years, 44°.121. 
If we adopt with Humboldt 656 feet as the altitude which pro- 
duces a variation of 1° of Fahrenheit, we shall have 1°.05, cor- 
responding to 1280 feet; and therefore, 
Observed Temperature of Leadhills, - - 44°.1--1 
Add for 1280 feet of elevation, - - - - 1.95 
Reduced to Level of the Sea, 46.071 
Mean Temp, of Leadhills, according to Dr Brewster’s for- 
mula, (Lat. 55° 25'), ^ - 46.26 
Difference, 0.189 
The Temperature of the Springs at Leadhills is - 44° 
Lowest Temp. Highest 
observed. observed. 
1811, 
Jan. 
15° 
July, 
76° 
1812, 
Dec. 
16 
J une, 
72 
1813, 
Mar. 
17 
June, 
75 
1814, 
Jan. 
64 
July, 
74 
1815, 
Jan. 
124 
June, 
76 
Lowest Temp. Highest 
observed. observedi 
1816, 
Jan. 
14° 
June, 
72° 
1817, 
Mar. 
13 
June, 
79 
1818, 
Feb. 
— 16 
July, 
77 
1819, 
Dec. 
— 12 
Aug. 
77 
1820, 
Jan. 
84 
June, 
i 
