546 
Proceedings of the Koyal Society of Edinburgh. [Sess. 
Table II. — The Number of Dust Particles in the Air at Appin in 
June and July 1910. 
Date. 
Hour. 
Number 
of 
Particles. 
Wind 
Direction 
and Force. 
Tempera- 
ture. 
Wet-Bulb 
Depression. 
Cloud 
Amount. 
Trans- 
parency 
of Air. 
29 
6.45 
688 
W.S.W. 1 
50-5 
5 
i 
i 
Paining 
9 
266 
W.N.W. 1 
... 
33 
Very clear 
30 
8.45 
357 
51 ’ 
2 
33 
55 
11.30 
322 
55 
3*8 
9 
10 
55 
3 
154 
N.W. 2 
54 
4 
33 
55 
6 
189 
55 
52-5 
35 
33 
55 
1 
8.45 
315 
W.N.W. -2 
52*5 
4 
33 
55 
12 
322 
N.W. 1 
52 
2 
1 
1 
55 
2.30 
329 
W. *5 
55 
5 
33 
55 
5 
280 
S.W. 1 
53 
35 
33 
55 
2 
8.45 
329 
N. -5 
54 
3 
a 
4 
5> 
11.30 
791 
W.N.W. 1 
55-5 
4-5 
1 
1 
55 
2 
485 
5) 
56-5 
5-5 
33 
55 
5.30 
252 
N.W. 1 
54 
4 
33 
55 
3 
8.30 
350 
N. -5 
52 
3 
33 
55 
1 
725 
N.W. 1 
59-5 
5-5 
1 
2 
55 
55 
3 
950 
55 
60-5 
6*5 
1 
4 
„ 150 
55 
6 
942 
55 
61 
7 
1 
10 
Clear 100 
55 
8.45 
315 
W.N.W. *5 
56*5 
5-5 
0 
33 
4 
8.30 
161 
55 
54-5 
3-5 
fo 
33 
» 
11.30 
245 
W.N.W. 1 
1 
2 
33 
33 
12.15 
245 
35 
56-5 
3-5 
33 
33 
33 
5.30 
625 
33 
57 
4 
1 
10 
33 
33 
8.30 
140 
33 
53 
3 
1 
1 
33 
5 
8.45 
273 
S.W. -2 
54-4 
3 4 
33 
5.15 
1550 ? 
N.N.E. -1 
53-5 
1 
33 
Very thick 
8.30 
1225 ? 
Calm 
53 
•5 
33 
55 
6 
8.30 
140 
N.W. -5 
55 
2-5 
33 
Very clear 
)) 
11 
224 
N.W. 1 
58 
5 
i 9 o 
55 
55 
1 
900 
W.N.W. 1 
57 
3*5 
33 
Medium 
55 
2.45 
1135 
W.N.W. 2 
Thickish 
5) 
4.10 
4900 
W.N.W. 3 
60 * 
5 
a. 
4 
„ 40 
5) 
6 
3350 
W.N.W. 2 
56 
4 
* 
55 
5? 
8.30 
3400 
55 
54-5 
4 
! 
55 
7 
8.30 
500 
N.N.W. 1 
56-5 
5-5 
1 
Clear 
5) 
10 
1000 
55 
58-5 
7 
I 
4 
55 
33 
12 
1900 
55 
„ 70 
55 
2.30 
3200 
N.N.W. 2 
62 ‘5 
if 
1 
2 
33 
55 
7.30 
875 
N. -5 
59-5 
7 
.?r 
33 
55 
8.45 
394 
N.N.E. *5 
57 
6-5 
i 
4 
33 
8 
8.30 
336 
N.N.E. 1 
55-5 
5-5 
0 
3' 
55 
10.30 
1900 
33 
33 
33 
55 
12.5 
3600 
N.N.E. 2 
33 
33 
55 
1 
6000 
5) 
63* 
9 
33 
33 
55 
4 
4800 
55 
67-5 
10-5 
33 
33 
55 
8.30 
1700 
55 
58 
6 
33 
Medium 
9 
8.30 
3750 
55 
54-5 
5 
33 
„ 60 
55 
12.30 
4000 
55 
65 
9 
33 
33 
55 
3.15 
3400 
55 
72-5 
13-5 
33 
,3 40 
55 
6 
3900 
55 
70 
12 
33 
„ 40 
55 
9.30 
3700 
N.N.E. -5 
62 
8 
33 
33 
