A Contribution to the Study of the Uainfall Map of South Africa. 377 
seven years' record, liitlierto unpublished, lowered the mean to less than 45 in. 
Places near latitude 24° S., especially when they project beyond 85° 
E., have a large winter fall made up apparently of storms similar to those 
which assail Natal. 
XXVII. British Ceyitral Africa. 
A region of abundant mean summer rainfall. Though entirely within 
the tropics it shows no definite indication of a double annual period. The 
maximum of intensity, however, appears to come progressively later as we go 
north, shifting from January to March in eight or nine degrees of latitude. 
The Nyassa Highlands are the only places where any rain to speak of falls 
between May and October. Lauderdale (XXVII, 500) appears to be almost 
the only station in South Africa which lives up to the traveller's wonders of 
rainfall described in pen and pencil books. 
Nearly all the material in XXVII is now published for the first time. 
XXVIII. East Africa. 
The general tendency is to maxima in April, July and November. 
Inland the July maximum disappears, and the November maximum comes 
later. The scheme of distribution of the rain over all this area is evidently 
most complicated, and requires more gauges to the square mile for its 
elucidation than any other area south of the equator. Aspect nearly every- 
where is of more importance than elevation, some of the loftiest stations 
being among the driest. Compare, e g., Amani with Kwai (XXVIII, 508, 
519), Euteganio (XXVIII, 581) with Fife (XXVII, 495). 
XXIX. British East Africa. 
These particulars have been transcribed from one of the Government 
reports, and include only recent observations. There appears to be a dry 
area protruding inland from near the equator and dividing the wet coast 
from the wet lakes. Thus we have Mombasa (XXIX, 548) with an annual 
fall of 55-68 in. and Port Florence (XXIX, 555) with 46-60 in. ; Avhereas 
Kismayu (XXIX, 539) has but 17-08 in., Athi Eiver (XXIX, 536) 25-08 in., 
and Nakuru (XXIX, 554) 38-24 in. 
Various annual mean falls for longer periods than seven years are : 
Years. 
Inches. 
Mombasa 
18 
54-43 
Fort Hall 
10 
46-72 
Kismayu 
15 
15-96 
Malindi . 
13 
40-01 
Makakos 
13 
35-37 
Mumias . 
11 
70-98 
Shimoni . 
14 
56-23 
Takaungu 
12 
45-23 
