The Bainfall of South Africa. 
369 
DIVISION (3). 
Section (a). — This condition occurred on 7 occasions ; wind was south 
to east each time, except on 2 calm days. Eain followed upon 3 
occasions only, and on 2 of these it was under 0*05 in. 
Section (b). — This happened upon 3 occasions, and dry weather 
followed each. 
Section (c). — This happened upon 4 occasions, and dry weather 
followed each. 
Peediction for Division. — Dry weather. 
SUB-GEOUP (C). 
This condition can be brought about by a depression to the south or 
east surging back, or to a secondary deepening over the land and moving 
down past L'Agulhas. When L'Agulhas is actually lowest rain may or may 
not come, but with either of the other stations lowest it is almost certain 
that dry weather will follow. 
DIVISION (1). 
Section (a). — This condition was present upon 29 occasions ; on 21 rain 
followed, and upon 8 it did not ; on each of the 21 days when rain followed, 
the conditions, with few exceptions, were brought about by the advent of 
winter type depressions. Eain fell at L'Agulhas on 6 of the 8 occasions, 
so we have only 2 complete failures. 
Prediction. — If the barometer reads lower at Clanwilliam than 
at the Eoyal Observatory, rain very doubtful. Otherwise — wet 
weather. 
Section (b).— This happened upon 13 occasions, and on 6 of them rain 
followed. No particular wind can be called as prevailing for wet weather, 
but most of the dry weather came with west winds. The condition is one 
indicating rain, either at the Eoyal Observatory or at L'Agulhas. 
Prediction. — Probable wet weather. 
Section (c). — This happened upon 17 occasions, and only on 5 of them 
did rain follow at the Eoyal Observatory ; wind was westerly for rain, and 
divided between easterly and westerly for dry weather ; the condition is 
for dry weather, and only upon rare occasions is this not so ; there must 
be a reason, but at present I cannot discover it. 
Prediction. — Dry weather. 
