718 A Sixth Memoir on the Law of Storms in India. [No. 127. 



great volcanic centre of the Japanese Archipelago. Between these we 

 have two tracks, Nos. II and XIX, which may be supposed, if they 

 originated at so great a distance, to have come from the active volcanoes 

 at the North extremity of the Marianas, as may also Nos. XVIII 

 andX. 



We have then two groups from Nos. VIII to XXVII, which all 

 pass over, if they do not arise from, active or half-extinct volcanoes ; 

 the North extremity of Luzon having the volcano of Camiguin and 

 another yet active, and a chain of active or half-extinct ones extend 

 through the almost unknown centre of that island. 



We have next a group of three storms, No. XVI to XXI, which ap- 

 pear to issue from the Straits of Mindoro, the Eastern extremity of which 

 has the great volcano of Albay, and to the South of it the half-extinct or 

 active ones of Samar, Leyte and Mindanao ; and lastly, we have a group 

 of three tracks which originate at, or cross, the Island of Palawan, 

 which having itself active volcanoes, has also to the South-eastward of 

 it Mindanao and the Siao and Sangir chain of active volcanos. 



It may be objected here that since the storms all come from between 

 N. N. E. and S. S. E., and the whole sea is bounded to the Eastward 

 by a volcanic chain at different distances, the storms must necessarily 

 come from some part of it. Allowing all due weight to this objection, 

 the coincidences I have shewn between the quarters or centres from 

 which the storms seem to proceed, or at which they seem to originate, 

 is worthy of attention, and I am not writing now to prove any thing, 

 but to suggest points of enquiry for future observers. 



I have already, p. 664 alluded to the well known fact at Manilla, that 

 no hurricane* occurs without some volcanic action more or less violent 

 being observed, and as the whole of the chain of the Philippines, from 

 Mindanao to the Northern extreme is full of active, or partially active 

 centres, far more so even than Java, there seems good ground for sup- 

 posing some connection ; but whether the volcanoes be the cause, or 

 they are agitated by the effect of the atmospheric disturbance, we 

 are as yet ignorant. 



In the Bay of Bengal if the tracks of most of our storms be prolong- 



* The Hurricanes are there distinguished from the monsoon gales by the term 

 Bagio, an Indian (Tagaloc) word, signifying a turning gale, as hurricane does in the 

 West Indies. 



