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Transactions of the Boyal Society of South Africa. 
DIVISION (3). 
Section (a). — This happened upon 14 occasions, and only upon 2 did 
rain follow ; wind was generally easterly. 
Section (b). — Here we have 8 cases, and only 1 of them followed by 
rain. 
Section (c). — There are 4 cases, each followed by dry weather. 
Peediction for Division. — Dry weather. 
SUB-GEOUP (M). 
By " simultaneous " I mean a difference among all barometers not 
exceeding 0-02 in. Thus, if the falls be 0-06 in., 0-06 in., and 0-08 in. 
respectively, this would be placed here; but should the falls be 0-06 in., 
0'07 in., and 0-09 in. respectively, it would be put down under Sub- 
Group (J). 
This condition is brought about by a very widespread yielding of 
pressure, and may be due to many causes — the passing away of an anti- 
cyclone ; the diminution, temporarily, of an anticyclone ; the general 
deepening of a large depression, &c. 
DIVISION (1). 
Section (a). — This happened upon 3 occasions, rain following 1 of 
them, when 0*35 in. fell at the Royal Observatory, and none at L'Agulhas ; 
however, on the 2 remaining occasions rain did come within 48 hours. 
Prediction. — Probable wet weather. 
Section (b). — This happened upon 6 occasions, and upon 2 of them 
rain followed. The argument under Section (a) holds good in this one. 
Prediction. — Probable wet weather. 
Section (c). — We have 8 cases, 3 of which were followed by rain, but 
the falls were slight and unexpected. 
Prediction. — Dry weather. 
DIVISION (2). 
Section (a). — Only 2 cases. 
Section (b). — Only 1 case. 
Section (c). — Only 2 cases. 
The majority of these cases were followed by dry weather. 
Prediction for Division. — Dry weather. 
