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388 Transactions of the Boyal Society of South Africa. 
SUB-GEOUP (L). 
This is due principally to the banking up of pressure to the south-west, 
and it is sometimes accompanied by the presence of a summer type 
depression to the north. It is also brought about through recovery of 
pressure after a winter type depression has passed. 
DIVISION (1). 
Section (a). — No cases. 
Section (b). —-There are 5 cases, each followed by dry weather. 
Section (c). — Here we have 8 cases, only 1 of which was followed by 
rain. 
Peediction for Division. — Dry weather, 
DIVISION (2). 
Section (a). — Only 1 case. 
Section (b). — There are 12 cases, and only 2 were followed by rain. 
Section (c). — Here we have 21 cases, and of these 16 were followed by 
dry weather ; of the remaining 5 cases, 1 had a fall of 0'05 in. and the 
other 4 less. 
Prediction for Division. — Dry weather. 
DIVISION (3). 
Section (a). — Only 2 cases, 1 followed by rain. 
Section (b). — This happened upon 11 occasions, and after 7 of them 
rain followed ; the weather conditions of the remaining 4 were such as 
would have caused one to look for rain. 
Section (c).— Here we have 11 cases, 6 followed by rain and 5 by dry 
weather ; in each of these cases a winter type depression had just passed, 
and clearing up showers would have been looked for. 
Prediction for Division. — Probable wet weather. 
SUB-GEOUP (M). 
This can come about at the rear of a depression, or when an anti- 
cyclone or low-pressure area alters its level generally. 
DIVISION (1). 
Section (a). — 3 cases, 1 followed by rain and 2 by dry weather ; the 
rainfall was only 0-05 in. 
