278 ExtrA METEOROLOGICAL OBSERVATIONS, 1845. 
ACTINOMETER. 
kersti : Makerstoun . 
aaah In Sun | Observation. | Change] Effect| Mean | Sun’s]} fean Time | In Sun Observation. Change | Effect | Mean | Sun’s} 
or in of of | Alti- of or in of of | Alti-] 
of - 
First Reading. | Shade. |Begun./Bnded.| 60°. | Sun. Group.| tude. } Pirst Reading. | Shade. |Begun.|Ended,| 60%. | Sun. |Group.| tude, 
ad oh om 5s Se. diy.| Sc. diy.| Se. diy. | Se. div. | Se. div. 
Marcu 12, 13. 
12 23 9 17| Sun | 21-4 | 24-1 | +2-7 
10 42} Shade} 23-8 | 22-7 | —1-1 3-6 
11 42] Sun | 22-7 | 25-1 | +2-4 | 3-5 
13 12| Shade} 24-7 | 23-6 | —1-1 3°5 
14 12| Sun | 23-6 | 26-0 | 4+2-4 | 3-6 
15 42) Shade] 25.7 | 24-4 | —1-3 | 3-8 |/3-69 
16 42| Sun | 24-4 | 27-0 | +2-6 | 3-8 
18 12} Shade} 26-8 | 25-7 | —1-1 | 3-7 
19 12| Sun | 25-7 | 28-3 | +2-6 | 3-8 
20 42} Shade| 27-9 | 26-6 | —1-3 | 3-9 
21 42} Sun | 26-6 | 29-2 | +2-6 | 3-9 
23 12} Shade} 28-9 | 27-6 | —1-3 | 3-9 
24 12| Sun | 27-6 |30-3 | +2-7 | 4-0 
25 42} Shade] 29-9 | 28-7 | —1-2 | 3-8 
26 42| Sun | 28-7 |31-3 | +2-6 | 3-9 |$4.04| 30-9]13 1 30 42] Sun 17-6 | 20-2 | +2-6 
28 12) Shade} 30-9 | 29-5 | -1-4 | 4.0 32 12} Shade] 19-8 | 18-7 | —1-1 | 3-8 
33 12} Sun | 18-7 | 21-5 | +2-8 | 3-8 
ny 
da ohom s. Se. div.| Se. div.] Se. div. | Se. diy.| Se. div. ~ 
Marcu 13. 
2 12| Sun | 20-3 | 22-7 | +2.4 
3 42] Shade! 22-5 | 21-7 | —0-8 | 3-2 
4 42] Sun | 21-7 | 24-1 |}+4+2-4] 3.2 
6 12) Shade} 24-0 | 23-2 | -—0-8 | 3-2 
7 12] Sun | 23-2 | 25-7 | +2-5 |] 3-4 
8 42] Shade] 25-6 | 24-7 | —0-9 | 3-3 
9 
42| Sun | 24-7 | 27-1 | 42-4 | 3.3 
11 12} Shade} 26-8 | 25-9 | —0-9 | 3-3 
12 12] Sun | 25-9 | 28-3 | +2:4 | 3-3 
13 42] Shade] 28-1 | 27-2 | —0-9 | 3-4 
14 42} Sun | 27-2 | 29-7 |+4+2-5 | 3-4 
16 12} Shade] 29-4 | 28-4 | —1-0 | 3-6 
17 12} Sun | 28-4 | 31-0 | +2-6 
29 12} Sun | 29-5 | 32-1 | 42-6 | 4-1 
30 42] Shade} 31-6 | 30-0 | —1-6 | 4:3 34 42] Shade} 21-3 | 20-4 | —0-9 | 3-7 
35 42| Sun | 20-4 | 23-3 | +2.9 | 3-9 
31 42} Sun [30-0 |32-9 | +2-9 | 4:5 
37 12} Shade} 23-2 | 22.2 | —1-0 | 3-9 
33 12} Shade} 32-3 | 30-8 | —1-5 
38 12| Sun | 22-2 | 25-2 | +3-0] 3-9 
39 42} Shade] 25-0 | 24.2 | —0-8 | 3.7 
40 42} Sun | 24-2 | 27-0 | +2-8 | 3-6 
42 12) Shade] 26-8 | 26-0 | —0-8 | 3.7 
43 12} Sun | 26-0 | 29.0 | +3-0 
3-78 | 28-8] 
12 23 44 12] Sun | 20-2 | 22-9 | +2-.7 
45 42) Shade} 22-6 | 21-1 | —1-5 
4 
Gee ee cles see ae 13. 1 50 12] Sun | 19-4 | 92.6 | +3.2 
3 
51 42} Shade} 22-3 | 21-2 | —1-1 | 4-3 
52 42] Sun | 21-2 | 24-5 |+4+3-3 | 4-4 
54 12) Shade} 24-3 | 23-3 | -1-0 | 4-3 
55 12} Sun | 23.3 | 26.6 | +3-3 | 4:3 
56 42} Shade] 26-3 | 25-3 | —1-0 | 4.4 
57 42| Sun | 25-3 | 28-7 | 43-4 | 4-4 
59 12} Shade} 28-3 |27-2 | —1-1 | 4-5 
13° 2 O 12} Sun | 27-2 |30-5 | +3-3 | 4-5 
1 42) Shade} 30-2 | 28-9 | —1-3 | 4-6 
48 12) Shade | 23-3 | 21-9 | —1-4 
49 12} Sun /21-9 | 24.3 | +2-4 
50 42] Shade | 23-8 | 22-2 | —1-6 
51 42| Sun | 22-2 | 24.6 |+2-4 | 4-0 |/3-96 
53 12} Shade| 24-0 | 22-3 | —1-7 | 4-1 
54 12) Sun | 22-3 | 24-7 | +2.4 | 4-0 
55 42) Shade} 24-0 | 22-5 | —1-5 | 3-9 
56 42} Sun | 22-5 | 24-9 | +2-4 | 3-8 
58 12} Shade| 24-3 | 22-9 | —1-4 | 3-8 
59 12] Sun | 22-9 | 25-3 | +2.4 
4.37 | 27: 
42| Sun | 28.9 132.2 /43-3| 4.5 
12| Shade|17-4 116.3 | —1-1 | 4.5 |{2°3| 24 
2 
4 
5 12/ Sun /|16.3 |19-8 | 43-5 | 4.6 
6 42) Shade} 19-4 [18-3 | —1-1 | 4-5 
13° 0 26 12) Sun 9-1 | 11-3 | +2-2 7 
27 42| Shade} 11-1 | 10-0 | —1-1 | 3-3 3) 
28 42) Sun | 10-0 | 12-3 | +2-3 | 3-4 10 
30 12| Shade} 12-0 | 10-9 | —1-1 | 3-4 |}3-42 
31 12) Sun | 10-9 | 13-2 | +2-3 | 3-5 
32 42/ Shade} 12-9 | 11-7 | —1-2 | 3-5 
33 42| Sun [11-7 | 14-0 | +2-3 
42) Sun 18-3 | 21-7 | +3-4 4-6 
12} Shade} 21-3 | 20-0 | —1-3 | 4.7 
12] Sun 20-0 | 23-4 | +3-4 | 4-6 
11 42] Shade} 23-0 |21-8 | —1-2 | 4.5 
12 42] Sun | 21-8 |25-0 | 43-2] 4-6 
14 12) Shade} 24-6 |23-0 | -1-6] 4-8 
15 12| Sun | 23-0 126.2 | +3-2 
March 122 23" 16™, Small patches of cloud coming near the sun. 21™. Patches of very thin cloud coming over the sun occasionally ;) 
they seem not to affect the indications of the instrument. 33™. Quite clear since 25™; dry thermometer 29°8 ; wet thermometer 26™1. 
March 134 14 2, (Observations made on the south side of the Observatory ; no clouds near the sun. 5™. A patch of cloud about 10° to 
eastward of the sun. 6™, A patch of cloud passed near the sun; no others passed within 15° of the sun. 18". Dry thermometer 33°1; 
wet thermometer 277. 1 
March 134 1 30™, Observations made within the porch of the Observatory. 
March 134 2h 4m 08, The screw of the actinometer withdrawn a little. | 
March 134 24 9™, Very thin clouds about 25° to westward of the sun; they seem to disappear when within 20° of him. 15™, Patches | 
of cloud coming within 10° of the sun. 
