166 REMARKS ON THE PRECEDING- PAPER, 



tance of Terra Anstralis. He gives also skeleton charts of the 

 prevailing winds in New South Wales and Tasmania, during 

 the winters of 1840-1-2, and during the summer of 1840, 

 by which we are to assume that, depending on the monsoons, the 

 winter winds veer round and within Australia from right to left, 

 and the summer from left to right. 



Since the date of that work, the subject of Cyclones or Circular 

 storms has been amply discussed, and among other writings a 

 treatise on " Australasian Cyclonology, or the law of storms in the 

 South Pacific Ocean," was put forth in 1853 by ^Mr. Dobson, of 

 Hobart Town, in which he endeavours to show that the great 

 storms of the Southern Pacific rotate from left to right, beginning 

 near the Equator, progressing first westerly, then to S.W., and 

 recurving towards S.E. He shows also, that the general storm 

 track of the South Pacific Ocean appears to follow the curvature 

 of the East Coast of Australia, as the storm track of the South 

 Indian Ocean does that of the West Coast of Australia. He 

 further points out that Bass's Strait is subject to two kinds of 

 Cyclones, one changing from N.W. to S. and S.W., and the other 

 from KE. to E. and S.E. The work of Mr. Dobson is filled with 

 examples from log-books and other data which, certainly, in 

 many instances, justify his conclusions. 



In 1859, Mr. W. S. Jevons, then a member of this Society, 

 published in Waugh's Almanac an elaborate collection of data 

 concerning the climate of Australia and New Zealand. These 

 were collected from contributions to newspapers and other sources 

 and from his own recorded observations. So far as they bear on 

 the question immediately before us, he adopts the conclusion, 

 that his " facts fall into beautiful harmony on the single supposi- 

 tion of two antagonistic winds." 



He speaks, firstly, " of the Great westerly ivind of the Southern 

 Hemisphere," secondly, of the " monsoon-like summer wind on 

 the ti.E. Coast" I quote one passage from this essay, because it 

 fitly introduces what I have to say respecting my own opinions. 

 Speaking of the ultimate causes of the changes of weather, he 



"The rain-bearing winds of New South Wales may be 

 connected with the S.E. trades, which, according to common rule, 



