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A PRELIMINARY SURVEY OF THE METEOROLOGY OF 
KIMBERLEY. 
By J. R. Sutton, Sc.D., F.R.S.S.Af. 
(Received October 9, 1912.) 
(Read October 16, 1912.) 
The present paper is intended as a further contribution to the meteor- 
ology of the Table-land of South Africa, arranged in a form suitable to the 
requirements of the physicist. Earlier instalments of the same series 
appeared from time to time in the Transactions of the South African 
Philosophical Society. The results given are deduced from observations 
made at Kenilworth (Kimberley) during the fifteen years 1897-1911. 
They show, in addition to yearly means and totals, deviations from the 
monthly mean values of all the more important recognised meteorological 
elements referred to the deviations from the monthly mean wind-direction 
resultant as argument. They are almost entirely statistical and tabular, 
and require very little in the way of explanatory setting at this time. 
Such results as these made at various places throughout the world have a 
certain amount of importance in view of the researches of Hildebrandsson 
and others on the centres of action of the atmosphere, and for other 
reasons. 
Table 1 gives the mean monthly direction of the wind deduced from the 
continuous records of an Osier anemometer. The Table shows the north 
and east components in hours ; the azimuth measured from the east point 
round by north ; and the magnitude of the resultant. The north compo- 
nent is at its maximum in February and July, and at its minimum in May 
and October ; while the east component has one maximum in June and 
one minimum in December. Thus there is a double oscillation in the year, 
the resultant direction starting from about north in January, tending gradu- 
ally to about east in May, turning slightly towards the north in June and 
July, after which it travels forward from east round by south and west for 
the rest of the year. The mean direction is about east by north and the 
magnitude of the resultant 1,083 hours. Table 2 shows that the resultant 
in any one year will probably not differ greatly from this mean value either 
in direction or magnitude — 1897 and 1911 being exceptional years. 
Table 3 gives the monthly deviations from the monthly means of 
