514 HENRY A. HUNT. 
Ordinary symbols have been used, except the circle half filled 
for thunderstorms, and the straight line shading ; parallel lines 
indicate the area of rainfall under one inch, crossed shading over 
one inch, 
TYPE I.—MOVING ANTICYCLONES. a 
One of the best marked features of Australian weather is the 
steady easterly progression of all the types, and the governing : 
type, that in fact about which all the other types seem to congre — 
gate, is the anticyclone ; it-has therefore been placed first in the 
series, with three charts to show the progress made by a quick 
moving one in forty-eight hours. The average daily progress of 
anticyclones is four hundred miles per day, but the speed at times - 
rises to one thousand miles.! 
Investigation so far leaves no room to doubt that in these lati : 
tudes a series of anticyclones surround the globe ; the latitude of 
the average one varies with the season, being farther south in 
summer than in winter. The normal circulation about an anti- 
cyclone brings southerly winds in front of them, and northerly 
winds in the rear, hence our cold and our hot winds. 
Chart No. 1 shows the position, on 15th August, 1893, of the 
eastern half of an incoming anticyclone; it rests over Western 
Australia, while the departing one is seen over the Tasman Sea; 
between these is seen the usual , depression, which is of average . 
intensity, and a dormant tropical low pressure to the north. IB : 
Chart No. 2 the anticyclone has moved nearly nine hundred miles : 
in the twenty-four hours, the centre being located near F owlers 
Bay, north of the Australian Bight; the antarctic A depressio® 
is well across the Tasman Sea, while the tropical or monst”™ 
isobar depicted in the previous chart has apparently merged nt 
the high pressure system, a curious and not unusual kink being 
formed to the north-east of it, following the contour of the Gulf 
of Carpentaria. On Chart No. 3 the anticyclone is shown © 
have moved a further seven hundred and fifty miles, or 4 total of 
1 Russell—Quarterly Journal R. M. S., Vol. xrx., No. 85. 
