Meteorology of South Africa. 
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to W., or from W. to WSW. ; and that towards the morning there would 
be a backing from WSW. to W., or from W. to WNW. The following 
tables bring out this argument, and prove it : — 
WNW. veered to W., or W. to WSW. 
Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec. Total. 
A.M. ... 1 2 3 1 1 0 0 2 1 1 2 6 20 
P.M.... 14 11 6 11 4 6 7 4 6 10 9 19 107 
WSW. backed to W., or W, to WNW. 
Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec. Total. 
A.M.... 99464763698 12 83 
PM. ... 120321120223 19 
The east wind must be similarly considered. Separating the three 
components, the tendency should be for the ENB. to blow of a morning 
and the ESE. of an evening. 
The following gives the days when the ENE. winds prevailed : — 
Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec. Total. 
A.M.... 317973684221 53 
P.M. ... 000131100100 7 
The following gives the days when the ESE. winds prevailed : — 
Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec. Total. 
A.M.... 12 8 6 2 3 1 3 3 4 7 12 10 71 
P.M.... 16 13 11 6 3 5 6 10 12 13 11 7 113 
Total, both winds 244 
In all 503 observations were made of east winds ; by deducting the 
ENE. and ESE. ones we obtain 259 as the actual number of true east 
winds. 
If land and sea breeze conditions affect the three components, we 
should expect a veering in the evening from ENE. to E., or from E. to 
ESE. ; and a backing of a morning from ESE. to E., or from E. to ENE. 
As a matter of fact, the NE. and SE. winds play such an important part 
that any such veering and backing of the east winds are completely 
masked, the number of instances being too small to be of use. 
Peesistency of Wind Directions. 
The following investigations, although not applying to land and sea 
breezes, have been included here as a fitting conclusion to this paper. 
Sometimes for a whole twenty-four hours, sometimes for days, the wind 
will continue to blow from the same direction, and this has been studied 
under the title of Wind Direction Persistency. All cases where wind 
