372 
Transactions of the Boyal Society of South Africa. 
Section (b). — There were only 3 cases and 2 were followed by dry 
weather. All were with easterly winds. 
Section (c). — This happened upon 10 occasions, and only upon 1 of 
them did rain follow, and then only 0-01 in, fell. 
Peediction for Division. — Dry weather. 
DIVISION (3). 
Section (a). — This came about upon 17 occasions, and only upon 1 did 
rain follow, but no rain was expected — in fact it was abnormal. 
Section (b). — This happened upon 16 occasions, and on 3 of them rain 
followed, but did not reach 0*05 in. 
Section (c). — This happened upon 22 occasions, and rain followed only 
1 of them ; no rain was expected. 
Prediction for Division. — Dry weather. 
SUB-GEOUP (F). 
Similar phenomena to those mentioned in Sub-Group (E) can bring 
about this condition, and we must be guided by studying the aspects when 
one or other station has the lowest reading. If L'Agulhas is the lowest 
it shows that the previous reading must have been higher than that at 
Clanwilliam, and it is evident that a depression to the south is affecting us. 
Then rain may follow. But under other conditions dry weather is 
almost certain. 
DIVISION (1). 
Section (a). — This happened upon 8 occasions, and on 6 of these rain 
followed with westerly winds, the dry winds being easterly. 
Prediction. — Wet weather. 
Section (b). — This happened upon 4 occasions, and on 3 of them rain 
followed. Upon the occasion when dry weather followed some rain would 
have been expected, and it did rain at L'Agulhas. 
Prediction. — Wet weather. 
Section (c). — This happened upon 6 occasions, and upon 4 of them 
rain followed, with westerly winds ; but although rain followed upon 
these days, this condition is not one for wet weather. 
Prediction. — Dry weather. 
DIVISION (2). 
Section (a). — This only happened once, and dry weather followed. 
Prediction. — Uncertain. 
