SOUTHERLY BURSTERS. 59 



the heaviest of the season resulted from a very gradual rise and 

 with a range of only -1 in the whole twenty-four hours. The 

 curves at the foot of diagram 3 relate to one feature of Table I. 



HOT SOUTHERLY WINDS. 



Instances have been recorded of hot southerly winds which 

 lasted for some hours. These are no doubt, the winds blowing on 

 the western aspect of the tropical depression. The following is 

 an account of a hot southerly wind copied from notes made by 

 Mr. Russell, and kindly placed at my disposal : 



" December 12th, 1883 1 Yesterday was hot, to-day hotter still, 

 and by 9 a.m. the temperature had risen to 82'6, wind from north 

 and hot. At noon the humidity fell to twenty-nine, and the 

 temperature had risen to 99 '6. At 3 p.m. the dry bulb stood at 

 95-6 and the wet at 71-1 ; from 9 a.m. to 6-30 p.m. the barometer 

 fell 0'350 and then began to rise rapidly, and by 8 p.m. had risen 

 0-215. At 6-30 p.m. as the barometer began to rise the wind 

 changed suddenly to south, and it felt more like a furnace blast 

 than a southerly burster. The wind continued as a hot wind for 

 more than an hour, but not strongly after the first violent gusts 

 were over ; by 9 p.m. a light warm air from south-west had set in 

 but the temperature was still 86 '6. I do not remember a hot 

 southerly like this before. On the morning following we had a 

 cool wind from north-west." 



In conclusion, it is needless to state that this investigation has 

 involved much labour and a vast amount of patient research, and 

 though I will be gratified if my efforts should in some degree, how- 

 ever small, contribute to a better knowledge of this phenomenon : 

 in any case, I will consider myself rewarded for the labour I have 

 given to is by the knowledge I have acquired while gathering 

 material for this essay. I am largely indebted to Mr. H. C. 

 Russell, who has kindly given me access to all the valuable records 

 of the Sydney Observatory, and furnised me with copies of 

 weather maps, photographs, etc., for which my warmest thanks 

 are hereby expressed. 



