250 Proceedings of Royal Society of Edinburgh. [sess. 
Number of Dust Particles — continued. 
Places. 
Date. 
Hour. 
Number 
of Par- 
ticles 
per c.c. 
Wind. 
Tempera- 
i ure. 
Humidity. 
State of 
the Air. 
Remarks. 
Alford, . . 
Sept. 
12 
10.0 a.m. 
650 
E. 0-5 
597 
4'5 
Thickish. 
Dull, cloudy morning. 1 
13 
11.0 a.m. 
1,400 
900 
E. 0-2 
55 
1 '6 
Thick. 
Light rain all day. 
,, 
,, 
2.0 p.m. 
Calm 
Clear. 
,, 
14 
10.0 a.m. 
850 
E. 0-2 
521 
4'9 
■) i 
,, 
5.30 p.m. 
850 
N.W. 0-2 
■ 
16 
10.0 a.m. 
1,125 
S. 1 
63" 
8*6 
Medium. 
Fine bright morning. 
Oct. 
24 
5.30 p.m. 
5,700 
S.W. 0-5 
Extly. thick. 
Gradually became very thick. 
Dumfries, 
10.30 a.m. 
600 
E. 1 
51 
7-5 
Clear. 
Sunshine and cloud. 
25 
10.0 a.m. 
1,025 
N.E. 0-5 
Clear. 
Fine day. 
26 
2.45 p.m. 
1,475 
N.E. 1 
44* 
6-5 
Medium. 
Fine day, with clouds in morn- 
850 
E. 2 
47-5 
7-5 
ing and sunshine in after- 
. 
3.30 p.m. 
1,200 
47 
7 
noon. 
, 
28 
10.0 a.m. 
5,500 
N.W. 1 
45 
6'5 
Thickish. 
Cloudy all day. 
,, 
29 
3.30 p.m. 
11,000 
S.W. 0-2 
45-2 
1-2 
Very thick. 
Dull most of the day. 
,, 
1,200 
S. 0-8 
50-5 
4-6 
Medium. 
30 
10.0 a.m. 
325 
S.W. 5 
52 
1 
Very thick. 
Raining. 
3.30 p.m. 
235 
52-5 
1 
Thick. 
Been wet and stormy. . 
31 
10.0 a.m. 
1,600 
S.W.’ 0-5 
47-8 
2'6 
Clear. 
Fine day. | 
Nov. 
1 
10.0 a.m. 
550 
S.W. 6 
42 
0-8 
Very thick. 
Rainy, stormy. 
r , 
,, 
3.30 p.m. 
395 
W. 4 
44-2 
1-8 
Thickish. 
Rain ceasing. 
2 
10.0 a.m. 
635 
N.W. 3 
47 
5 
Clear. 
Very fine day. 
4 
,, 
4,600 
N.W. 0-2 
43-5 
1-5 
Thickish. 
Wind variable, fine day. 
5 
,, 
1,350 
S.W. 0-2 
42 
0'2 
Very thick. 
6 
,, 
1,635 
S.W. 0-2 
47-5 
2-5 
Medium. 
11 11 
’? 
2.30 p.m. 
1,360 
1,250 
W. 1 
50 
4-6 
Clear. 
Fog on hills. Dull all day, with 
10.0 a.m. 
W. 1 
56 
1-5 
Thickish. 
,, 
3.0 p.m. 
1,400 
W. 1 
56-5 
15 
Thick.’ 
slight rain. 
V9 
8 
10.0 a.m. 
5,350 
S.W. 0-2 
49-8 
1-8 
Wind variable, dull day. 
Fine day. 
2.30 p.m. 
2,670 
. 
50 
0-5 
Thick. 
9 
10.0 a.m. 
625 
W. 2 
54 
2-0 
Very clear. 
,, 
3.0 p.m. 
750 
W. 3 
53-8 
2-5 
Very clear. 
Dull day. 
11 
10.0 a.m. 
2,250 
W. 0-5 
50-2 
1-4 
Thickish. 
2.45 p.m. 
1,375 
49-2 
1-2 
Very thick. 
12 
9.30 a.m. 
2,500 
S. 0-2 
49-5 
0-5 
Extly. thick. 
Dull day. 
13 
10.30 a.m. 
8,600 
Calm 
39 
o-o 
Extly. thick. 
Very thick fog. 
1 
3.0 p.m. 
8,000 
Calm 
39-3 
o-o 
Thick fog, but clear overhead. 
14 
10.0 a.m. 
9,900 
7,070 
45-1 
1-6 
Extly. thick. 
Not so thick as previous day. 
,, 
2.30 p.m. 
S.W.’ 0-5 
47-8 
2'0 
15 
10.0 a.m. 
975 
51-5 
0-5 
Thick.’ 
Dull most of day. 
3.0 p.m. 
900 
52'7 
1-8 
Air got slightly clearer. 
, 
4.0 p.m. 
650 
S.W. 1 
52-9 
2-9 
Thickish. 
Air now much clearer. 
16 
10.0 a.m. 
7,700 
N.W. 0-2 
43'5 
2-5 
Thick. 
Cloudless all day. 
IT 
,, 
12 
4,700 
Calm 
46 
3-5 
Thickish. 
Fine day. 
18 
10.0 a.m. 
9,000 
11,500 
46 
0-9 
Very thick. 
Dull all day. f 
” 
19 
10.0 a.m. 
S.W. 0-2 
48-8 
1-0 
Extly. thick. 
Dull. 
