Meteorology of South Africa. 
167 
So that true displacing land and sea breezes blew upon 206 occasions 
out of 380. 
Both these are high percentages. 
At present nothing can be stated as to the time of day when a wind 
changed, and until an investigation of self-recording instruments has been 
made the matter must remain in abeyance. 
Taking the east and west components together, we get : — 
Total number of night winds 171 + 146 = 317 
Total number of morning winds 209 + 146 = 355 
672 
Total number of veering and backing winds, 409. 
409 = 60-86 per centum of 672. 
We will tabulate our facts in another form : — 
Normal Winds. 
A.M. P.M. 
Number of times for west winds 415 643 
Number of times for east v/inds 274 229 
Morning, or Land Winds. 
Number of times for NW. winds 146 51 
Number of times for NE. winds 209 62 
Number of times for N. winds 169 43 
524 156 
Evening, or Sea Wijids. 
Number of times for SW. winds 49 146 
Number of times for SE. winds 44 171 
Number of times for S. winds 30 57 
123 374 
Although the west and east winds have been defined as normal, still 
if they displace winds from other directions, and are not continuous, this 
may be the result of land and sea breeze influence ; that is to say, with 
the morning west winds and the evening east ones the continuous winds 
will represent normal conditions, and the remainder those influenced as 
before stated. 
