170 Transactions of the Royal Society of South Africa. 
blew from one direction, covering two or more continuous observations, 
have been included ; only those which blew during one observation have 
been put aside. 
In this investigation the wind rose has been divided into sixteen 
points. 
It has been found that the north-west and north-east winds blew 
more persistently during winter than during summer ; but the west ones 
were more persistent during summer, as were also the east winds. 
There was an entire absence of persistency from the south-east during 
winter, but this was compensated for during summer; this is in direct 
opposition to the north-east winds. 
All wind persistencies are in accordance with the monthly distribution 
of barometric pressure, as the following table will show : — 
Jan. Feb. Mar. April. May. June. 
N. 
0 
0 
0 
0 
2 
3 
NNW. 
0 
0 
0 
0 
3 
NW. 
0 
3 
2 
3 
17 
12 
WNW. 
5 
2 
6 
7 
7 
2 
W. 
37 
41 
34 
31 
8 
15 
WSW. 
2 
7 
3 
0 
0 
2 
sw. 
5 
6 
5 
2 
0 
2 
ssw. 
0 
0 
0 
0 
0 
0 
s. 
0 
0 
2 
0 
0 
0 
SSE. 
0 
2 
2 
0 
0 
0 
SE. 
0 
10 
4 
4 
0 
0 
ESE. 
14 
12 
5 
2 
2 
2 
E. 
4 
4 
5 
9 
4 
0 
ENE. 
0 
0 
0 
2 
4 
0 
NE. 
0 
3 
0 
2 
17 
25 
NNE. 
0 
0 
0 
0 
2 
0 
Taking the Annual Wind Eose 
following table : — 
1876. 
N. 0 
NNW 0 
NW 26 
WNW 9 
W 88 
WSW 6 
SW 16 
SSW 2 
S 2 
SSE 0 
SE 25 
ESE 2 
E 17 
ENE 2 
NE , 48 
NNE 2 
July. 
Ant; 
Sept. 
Oct. 
Nov. 
Dec. 
Total. 
2 
2 
0 
2 
0 
2 
13 
3 
0 
0 
0 
0 
0 
6 
15 
12 
3 
12 
2 
3 
84 
0 
2 
4 
4 
0 
5 
44 
8 
10 
38 
31 
33 
37 
323 
0 
4 
2 
3 
11 
10 
44 
2 
2 
3 
4 
9 
2 
42 
0 
2 
0 
0 
2 
0 
4 
0 
0 
0 
0 
0 
2 
4 
0 
0 
0 
0 
0 
0 
4 
0 
0 
12 
14 
8 
4 
56 
0 
3 
4 
4 
7 
4 
59 
0 
0 
9 
15 
4 
2 
56 
0 
0 
0 
0 
0 
0 
6 
33 
7 
0 
0 
2 
0 
89 
2 
0 
0 
0 
0 
0 
4 
for persistent winds, we get the 
1877. 
1878. 
1879. 
Total. 
6 
5 
2 
13 
3 
3 
0 
6 
20 
26 
12 
84 
11 
18 
6 
44 
82 
58 
95 
323 
10 
18 
10 
44 
9 
9 
8 
42 
0 
2 
0 
4 
0 
0 
2 
4 
0 
0 
4 
4 
22 
0 
9 
56 
16 
19 
22 
59 
12 
9 
18 
56 
0 
0 
4 
6 
21 
3 
17 
89 
2 
0 
0 
4 
