Causes of certain Winds and Storms. 179 



close of the day than at any other tmne. These squalls mode- 

 rate tlie heat, and continue until the setting in of the periodical 

 rains." It is stated farther, that, " during the dry season, the 

 heat of the middle districts is lessened by occasional thunder- 

 storms, named north-xoesters *•" 



(to.) " Thunderstorms are very frequent at Batavia, espe- 

 cially towards the conclusion of the Monsoons, when they occur 

 almost every evening •f*.'" 



(«.) It is stated by Veicht in the Philosophical Transactions 

 for 1764, that in " Bencoolen road, on the S. W. side of the 

 island of Sumatra, as well as in the strait of Malacca, you have 

 periodical winds, which blow for six months of the year from the 

 same quarter of the horizon, and the other six months from the 

 opposite quarter ; and it is observable that these thunder showers 

 and squalls of wind usually come contrary to these stated winds, 

 which are calmed during the thunder, but return to their con- 

 stant quarter as soon as the thunder and rain are past." Also 

 by Shorte in the Transactions for 1780, that at the mouth of 

 the Senegal River> during the rainy or sickly season, which be- 

 gins about the middle of July, and ends about the middle of 

 October, " the wind is generally between the points of east and 

 south, the quarter from winch the tornadus corned 



It appears also from Major Denham's account of the rainy sea- 

 son at Kouka, in Bornou, that in that country the thunder- 

 storms are generally from the north-east and south-east. These 

 are exceptions to our general doctrines, produced by local causes, 

 such as are perpetually occurring in every part of the science of 



meteorology. 



( To be continued.) 



Further Notices in regard to the Fossil Bones found in Wel- 

 lington Country^ Nexo South Wales. By Major Mitchell, 

 Surveyor-General of New South Wales. 



jL he account of the remarkable Bone District in New South 

 Wales, in the last number of this Journal, deUvered to us by Dr 

 Lang of Sydney, we have inadvertently published as the composi- 



* Hamilton's Account of Hindostan. + Stockdale's Java, p. 3C. 



