1844.] Memoir on Indian Earthquakes. 977 



and the occurrence of storms. That the connection is not an invaria- 

 ble one, scarcely lessens the interest of the enquiry, as observations may 

 yet be accumulated which will exhibit the causes of this variability, 

 and throw light on the true nature of the dependence of the earth- 

 quaking and atmospheric forces on each other. As a very interesting 

 indication of this dependence, arrived at by a totally different course 

 of enquiry from the present, I may quote the few following remarks 

 from Mr. Piddington's Sixth memoir on the Law of Storms in 

 India (Journal Asiatic Society, No. 127, p. 7170 " Before I conclude, 

 1 must allude, as a question of research only, to another remarkable 

 feature in these tracks, and indeed all the storm tracks we have yet 

 traced out, which is this : If we look at the chart, we shall see that 

 almost the whole of the storms seem to come in groups from certain 

 quarters, and these quarters are those in which active and half extinct 

 volcanoes are situated. 



" Considering our charts in this point of view, we shall observe that, 

 to commence from the northward six tracks, Nos. XXIX to X appear 

 to come from the north-eastward, or from the direction of the great 

 volcanic centre of the Japanese archipelago. Between these we have 

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

 nated 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, while a chain of active or half extinct ones ex- 

 tends through the almost unknown centre of that Island. 



"We have next a group of three storms, Nos. XVI to XXI, which 

 appear 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. Lastly we have 

 a group of three tracks which originate at or cross the Island of Pa- 

 lawan, which having itself active volcanoes, has also to the south east- 

 ward of it Mindanao, with Siao, and Sangir a chain of active volcanoes." 

 Mr. Piddington after stating that his object is simply to draw atten- 

 tion to circumstances sufficiently remarkable to merit it, further re- 

 marks, " I have already alluded to the well known fact at Manila 



