BY THE USE OF KITES OFF THE WEST COAST OF SCOTLAND, 1902. 
139 
Table C. 
Date. 
Foi't William. 
Ben Nevis. 
Temperatiii'e 
differences. 
Dry 
bull). 
Wet 
bulb. 
Dry 
bulb. 
Wet 
bulb. 
Wind. 
Direction. 
Force. 
Weather. 
Ben 
Nevis 
}- 
f Free 
I air at 
1 same 
[height. 
W 
° C. 
o 
C. 
o 
C. 
° 
0. 
July 
1, 
12.25 r.M. 
11 
7 
12 
7 
4 
4 
4 
4 
Var. 
0-1 
d.m. 
o 
— O 
3 
9, 
12.5 „ 
12 
9 
12 
6 
6 
1 
6 
1 
W. 
0-1 
d.m. 
-1 
6 
15, 
11.30 A.M. 
13 
7 
13 
1 
5 
7 
5 
7 
W. 
1-2 
m. 
-0 
o 
O 
15, 
5.40 r.M. 
15 
8 
12 
8 
4 
3 
4 
3 
w. 
1-2 
m. 
-1 
8 
16, 
12.10 „ 
13 
2 
12 
4 
4 
8 
4 
8 
s.w. 
2 
r.m. 
-1 
8 
18, 
12.10 „ 
13 
2 
10 
0 
1 
7 
1 
7 
N. 
0-1 
f. 
_ 2 
7 
21, 
6.0 „ 
12 
9 
8 
3 
-0 
7 
-0 
9 
N. & W. 
0-1 
f. 
- 1 
7 
26, 
10.45 A.M. 
10 
9 
9 
4 
3 
1 
3 
1 
E. 
2-6 
r.m. 
-1 
4 
26, 
8.5 P.M. 
10 
6 
9 
9 
9 
0 
2 
0 
N., N.E. 
1-3 
111. 
-4 
7 
28, 
7.0 „ 
11 
9 
11 
0 
3 
1 
3 
1 
S.S.W. 
0-2 
r.m. 
-1 
9 
29. 
12.30 „ 
13 
1 
10 
6 
1 
8 
1 
8 
Var. 
0-2 
m. 
_ 2 
0 
29, 
7.40 „ 
12 
1 
8 
9 
0 
6 
0 
6 
Var. 
2-3 
111. 
_ 2 
8 
n 
30, 
11.10 A.M. 
12 
7 
9 
0 
1 
0 
1 
0 
Var. 
0-1 
r.s.ni. 
_ 2 
9 
Aug. 
1, 
7.0 r.M. 
11 
1 
10 
5 
2 
3 
2 
3 
S. 
1-3 
r.m. 
-1 
6 
2, 
12.10 „ 
12 
4 
12 
1 
3 
9 
3 
9 
S.W. & s. 
1-2 
d.m. 
-1 
1 
9 
5.0 „ 
13 
3 
12 
7 
3 
5 
3 
5 
N.W. & W. 
1 
r.ni. 
- 2 
0 
55 
6, 
1.10 „ 
15 
i 
10 
9 
1 
9 
1 
9 
E.S.E. 
3 
111. 
-5 
3 
55 
8, 
5.10 „ 
13 
9 
10 
9 
2 
4 
2 
2 
N.E. 
1-2 
f. 
- 2 
8 
55 
9, 
5.0 „ 
13 
3 
11 
2 
3 
1 
• ) 
o 
1 
N., Var. 
1 
r.m. 
-1 
9 
55 
11, 
12.5 „ 
11 
9 
10 
1 
1 
5 
1 
5 
N.N.E. 
1 
r.s.m. 
— o 
4 
55 
11, 
9 0 
- .w ,, 
12 
8 
10 
2 
1 
3 
1 
3 
Calm 
0 
r.m. 
-3 
6 
55 
12, 
10.30 A.M. 
13 
0 
9 
9 
4 
4 
2 
9 
N. 
2 
1. to N. & E. 
-0 
7 
55 
19, 
3.30 r.M. 
15 
0 
11 
9 
2 
4 
2 
2 
Var. 
0-1 
f. 
— 2 
8 
55 
20, 
11.0 A.M. 
13 
5 
11 
5 
2 
8 
2 
8 
Var. 
0 
r.m. 
-3 
3 
55 
20, 
1.0 r.M. 
12 
3 
10 
5 
2 
3 
2 
3 
E. 
1 
m. 
— o 
8 
55 
23, 
11.10 A.!\[. 
14 
4 
13 
8 
5 
6 
5 
6 
S.W. 
0-2 
111. 
-3 
o 
O 
55 
23, 
1.30 r.M. 
14 
8 
14 
0 
5 
7 
5 
7 
W. V s.w. 
1-2 
111. 
-3 
1 
55 
25, 
3-10 „ 
16 
5 
13 
1 
3 
4 
3 
4 
N. & N.N.W. 
1-2 
f. 
- 5 
5 
Mean . 
-2 
6 °C. 
Although it could hardly have been expected that actual agreement would have 
been found, the differences are striking, and it is desirable to consider whether it is 
possible to suggest a reasonable explanation without attributing them to instrumental 
errors. As the ascents were in the daytime, any effect of the daily range of 
temperature on the mountain would p)robably give a result in the opposite direction. 
The following considerations would tend to account for such a gradient:—With 
westerly winds the actual air particles that pass through the thermometer screen on 
the mountain are probably those which a short time previously have been close to 
the sea surface, for the stream lines must more or less follow the form of the bounding 
T 2 
