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A NOTE ON THE TEMPERATURES OF THE AIR OBSERVED 
AT MOCHUDI. 
By J. R. Sutton, Sc.D., E.R.S.S.A. 
(Received and read April 15, 1914.) 
Mr. W. A. H. Harbor has recently sent me for inspection his records 
of meteorological observations taken at Mochudi, in the Bechuanaland 
Protectorate. Although the period covered by the observations is short, 
running only to four years and nine months, the results are of interest 
not only in themselves, but because of the lack of published information 
concerning the climatology of that Province. Only the temperatures of 
the air are dealt with in this note. 
Table 1 gives for the period spoken of — 
1. The average maximum and minimum temperatures for each 
month, and for the year ; 
2. The greatest and least temperatures observed in each month ; 
3. The greatest and least of the mean maximum and minimum 
temperatures of each month ; 
4. The extreme ranges observed. 
It appears from this Table that the maximum temperatures are closely 
dependent upon the sun's meridian altitude, resembling in this respect 
the maximum temperatures observed at Kimberley. How closely can 
only be determined when sufficient observations have been accumulated 
to allow of the averages being adequately represented by a formula. 
Meanwhile it can be seen that while the curve representing the maxi- 
mum temperatures has its least value some time between the middle 
and end of June, the greatest value comes some days earlier than the 
December solstice. On the other hand, the curve of minimum tem- 
peratures has its least value early in July and its greatest value late 
in January. 
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