1850.] Nineteenth Memoir on the Law of Storms. 389 



verge of the Westerly monsoon and trade wind limits, great variation 

 in the tracks is to be looked for. 



Next, the serpentine course of the Jumna* s hurricane most remark- 

 ably approaches to what we have upon record in various works describ- 

 ing the tracks of Tornadoes and land-spouts or whirlwinds (many 

 of them evidently electric by their effects) and hail- storms. And the 

 Comte de Tristan* has satisfactorily shewn in treating of this last class 

 of phsenomena, and of thunder-storms, that their clouds attract and 

 cause each other to deviate from their route ; often appearing stronger 

 afterwards. "We require farther evidence to affirm certainly that this 

 occurs with Cyclones, but there are now strong probabilities that it 

 does ; and our present knowledge will serve to put the careful seaman 

 on his guard till more is obtained, and afford many suggestions for 

 intelligent observers. 



Finally : all this we see occurs in the Storm Tract to which I have 

 so often and so earnestly drawn the attention of mariners navigating 

 the Indian Seas, and in which indubitably so many fatal losses and so 

 much damage have occurred. And it must be now s evident to the 

 most reckless that no ship can be too well prepared which has to cross 

 these dangerous latitudes. 



* Annates de la Societe Royale d'Orleans, before quoted p. 



3 E 



