Meteorology in South Africa. 



73 



Percentage Frequency of Winds, calculated from the "Challenger" 

 data. Hours various. i8 years, 1842-55, 62-65.'" 



In both Tables the figures in heavy type indicate the ma.ximum Irequency and 

 those in italics the minimum frequency of each wind-direction ; the figures 

 underlined show the prevailing wind-direction during each month. 



A comparison of the accompanying two tables, giving the per- 

 centage frequency of the winds from the eight principal points of the 

 compass shows that while the " Challenger " results indicate that 

 south is the prevailing wind direction in every month of the year, 

 the other table shows decided indications of a " monsoon " influence, 

 in that during the winter months of June-August the prevaihng 

 direction is North-Westerly, while it is Southerly during the rest of 

 the year. These latter results accord much more with my experience 

 of the Cape, but a full discussion of the anemometer records would 

 be necessary before the question could be considered satisfactorily 

 settled. I hope, however, to develop this subject more fully at a 

 later date elsewhere. 



If any progress is to be maJe in solving the many problems 

 associated with the Meteorology of South Afiica, some addition to 

 the staff of the Meteorological Commission is absolutely necessary, 



* Physics and Chemistry of the Voyage of H.M.S. Challenger : Part V., Report 

 on Atmospheric Circulation. — By Alexander Buchan, LL.D. 



