EXPLANATION OP PLATES. 
Plate I — Is intended to show the lines of equal pressure on the 5th, 
6th, 7th, and 8th May, at 9 a.m., illustrating the remarks at 
page 2. 
Plate II. — Fig. 1. — Chart showing distribution, &c., of winds at 9 
a.m. on Saturday, 8th May, 1880. Arrows fly with the wind. 
Fig. 2. — Curves showing the fluctuations of the barometer at Mel- 
bourne, Sidney, and Brisbane. 
Fig. 3. — Curves showing the fluctuations of the barometer at various 
stations in Western and South Australia, Victoria, Tasmania, 
New South Wales, Queensland, and New Zealand, during period 
5th to 13th May, 1880. 
