188 Transactions of the Boyal Society of South Africa. 
a practical way must necessarily involve great labour. The method 
adopted here, after various unsatisfactory trials, is the following : — 
Let t be the temperature at any hour on any day at Kimberley. 
Then the temperature t' at the next hour will depend partly upon t 
and partly upon the meteorological elements of wind and moisture 
coexisting. That is to say, for given wind and moisture conditions, V 
July, 1911. 
XV. 
XVI. 
Diff. 
t. 
t'. 
t - t'. 
0 
o 
0 
1 
58-5 
57-5 
+ 1-0 
2 
61-0 
60-2 
+ 0-8 
3 
62-4 
61-2 
+ 1-2 
4 
66-5 
65-3 
+ 1-2 
5 
71-0 
69-2 
+ 1-8 
6 
74-4 
73-5 
+ 0-9 
7 
71-0 
69-5 
+ 1-5 
8 
657 
64-8 
+ 0-9 
9 
62-8 
61-8 
+ 1-0 
10 
55-3 
57-0 
-1-7 
11 
60-8 
61-0 
-0-2 
12 
62-0 
63-6 
-1-6 
13 
68-0 
66-9 
+ 1-1 
14 
54-0 
53-0 
+ 1-0 
15 
46-0 
45-2 
+ 0-8 
16 
58-0 
58-0 
0-0 
17 
59-2 
59-0 
+ 0-2 
1 Q 
du u 
Oo y 
+ 11 
19 
63-3 
62-9 
+ 0-4 
20 
66-5 
66-0 
+ 0-5 
21.. 
54-4 
55-0 
-0-6 
22 
70-0 
69-2 
+ 0-8 
23 
730 
71-0 
+ 2-0 
72-3 
72-0 
+ 0-3 
25 
73-7 
71-0 
+ 2-7 
26 
58-5 
58-5 
0-0 
27 
55-8 
59-0 
-3-2 
28 
54-0 
53-0 
+ 1-0 
29 
62-8 
61-1 
+ 1-7 
30 
64-0 
65-2 
-1-2 
31 
57-4 
57-0 
+ 0-4 
62-7 
62-1 
1 
0-6 
