1054* Memoir on Indian Earthquakes. [No. 144. 



detached mounds of steep well-wooded sides, the loftiest of which, near 

 the South part of the island, rises nearly 1,400 feet." 



From the details given in this extract in combination with those 

 given before, it appears that the range of the great Earthquake of April 

 1762 was from about 16° to 23° North latitude, or from near Cape 

 Negrais to the northward of Calcutta, and from about 87° to 94° East 

 longitude. These limits are I need scarcely remark, by no means 

 certain, but the yare the nearest, which existing information admits of our 

 arriving at. The province of Arracan seems to have been the seat of 

 the greatest intensity of the shock, and the whole eastern coast of the 

 Bay exhibits indications of having experienced its violence. We are 

 fortunate in having such ample details from the province of Chittagong, 

 as they furnish several phenomena of interest which will be discussed 

 hereafter. 



The other Earthquakes attributable to the tract now under notice are, 

 as I previously remarked, traditional, and the traditions of their occur- 

 rence are confirmed by physical evidence on the coast. But as to their 

 dates or phenomena, I have no information to give. 



I may conclude the notice of the Arracan tract by a brief descrip- 

 tion of the volcanic features of portions of the coast not yet referred 

 to. 



I before stated, that in tracing the geographical limits of volcanic 

 regions, Mr. Lyell did not carry that of the Moluccas beyond Barren 

 Island, in latitude 12° N. The only indication of activity furnished by 

 this island when described by Dr. Adam in 1832, consisted in the con- 

 stant evolution of thin light smoke, (Jour. As. Soc. Vol. I, p. 128,) and 

 ten years later when visited by Capt. Miller, the same effect continued 

 (McClelland's Journal, No. II, p. 423.) No records exist of any inter- 

 mediate convulsion, either in the form of eruption or earthquake, nor 

 am I aware of the island having exhibited any sympathy with the 

 shocks that have been experienced on the coast of the main land. 



Proceeding northward, the Island of Narcaudam, Dr. McClelland in- 

 forms us, (J. A. S. vol. VII, p. 77,) is a volcanic cone raised to the 

 height of 700 or 800 feet. This cone is situated in 13° 22' North lati- 

 tude : " its upper part is quite naked, presenting lines such as were 

 doubtlessly formed by lava currents descending from the crater to the 

 base, which last is covered with vegetation. No soundings are to be 

 found within half a mile from the shore." 



Chedooba, in latitude 18° 40' 55" has already been described at 

 length. In old charts it is represented as a burning mountain, a cir- 

 cumstance traceable to the intense light which, according to Captain 

 Halsted, is occasionally emitted by the larger mud volcanoes, and 

 which seen from a distance, would make the island appear to be in ge- 

 neral eruption. 



Ramree, in lat. 19° N. abounds in highly interesting volcanic pheno- 

 mena. Mud volcanoes similar to those in Chedooba are numerous, 

 and earthy cones of smaller dimensions covered merely with a green 



