AN ESSAY ON SOUTHERLY BURSTERS. 173 



greater part of three days with a force varying between five 

 and fifteen miles per hour, and at 1 a.m. on the 22nd immediately 

 before the burster it was practically calm. This burster began 

 with a velocity of seventeen miles per hour ; between 4 and 11 a.m. 

 the hourly force pulsated between eleven and fifteen miles, it then 

 again rose and twenty-seven miles per hour was reached at 3 a.m., 

 and at 315 a.m. thirty-eight miles the greatest velocity; it then 

 gradually fell away and veered through east to north early on the 

 26th. This may be taken as a modified type of the popular 

 burster. (See page 150). 



Cloud notes on burster of 22nd February, 1894 — Warm swelter- 

 ing day on 21st, excepting a small patch of cumulus visible at 3 

 p.m., not a cloud was seen up to midday 22nd. At daylight on 

 the 23rd cirro-cumulus to extent of *3 moving from the south, 

 upper strata very light mackerel with just a perceptible motion 

 from west-north-west ; clouds gradually extending up to 11 a.m., 

 when it became completely overcast and a light misty rain began 

 to fall at 11*40 a.m. Thunder at 12'50 p.m. ; thunderstorm 

 between 1 and 2 p.m., clouds breaking at 3 p.m. to south. An 

 upper strata of cirrus visible to the south-west, but too distant to 

 note motion ; cleared by evening. 



On November 13, 1893, came a burster of little intensity or 

 interest save for the very remarkable cloud roll, the finest that 

 has been seen in Sydney for some years, The weather conditions 

 at 9 a.m. of November 13 are well shown in weather chart No. 5. 

 An anti-cyclone rested over Western Australia, with its centre 

 about latitude 30° south, and longitude about seven hundred 

 miles west of Adelaide, while in front of it is a well marked \ 

 depression, with its axis north-north-west and south-south-east, 

 and lying centrally over Victoria and the western districts of 

 New South Wales, about three hundred miles west of Sydney ^ 

 The whole system was moving very rapidly, and from the position 

 of the centre of the high pressure at 9 a.m. of 14th (weather 

 chart No. 6) the forward motion in twenty-four hours is seen to 



