tia - PHILOSOPHICAL TRANSACTIONS, [anN0 1763, 



XXXIX. Of an Earthquake at Chattigaon. Translated from the Persian by 

 Mr. Edward Gulston, in the Service of the East India Company], p. 251. 

 This earthquake happened in the region of Islamabad on the 22d of the month 

 Chytt 1 168 Bengal asra, answering to the 2d of April, 1762, on Friday about 5 

 o'clock in the afternoon. Many houses were thrown down : and in various places 

 the land, and even the hills, rent and sunk a considerable depth ; at the same 

 time water sprung up, and overflowed many parts of the country. 



XL. Of the same Earthquake in the East Indies ; and of two Eclipses of the Sun 

 and Moon, observed at Calcutta. By the Rev. William Hirst, M. yl., F.R.S. 

 p. 256. 



This earthquake, which happened April 2, 1761, was very violent in the king- 

 doms of Bengal, Aracan, and Pegu, but particularly at the metropolis of Aracan, 

 where, according to the accounts of an English merchant residing there, the ef- 

 fects have been as fatal as at Lisbon, and where it is thought the chief force of 

 the earthquake vented itself. At Dacca, in this kingdom of Bengal, the conse- 

 quences have been terrible ; the rise of the waters in the river was so very sudden 

 and violent, that some hundreds of large country boats were driven ashore, or 

 lost, and great numbers of lives lost in them. No less deplorable are the accounts 

 from Chattigaon in this same kingdom. The same earthquake was also very 

 alarming at Chirotty, where Colonel Coote with his Majesty's troops are in can- 

 tonment about 18 miles up the river from this place. The waters in the river 

 and tanks there were violently agitated, and in many places rose to more than 6 

 feet perpendicular height. Nearly at the same time was this earthquake felt at 

 Calcutta, where the agitation of the waters in the tanks rose upwards of 6 feet, 

 and was in the direction north and south. A subsequent earthquake was felt at 

 Calcutta the 13th of July following, at half past 2 in the afternoon. 



Observations of a solar eclipse made at Ghyrotty, about the latitude 22° 51' 

 north, the watch adjusted to apparent time. 



Beginning of the lunar immersion 2*^ 49"" 30* 



Greatest visible obscurity near 1 1 digits eclipsed 4 5 38 



End of the eclipse 5 12 20 



Total duration 2 22 30 



The next observation was of the eclipse of the moon, which he made Nov. 2, 

 1762, in conjunction with Mr. Hancock, at his house in Calcutta, who supplied 

 him with some excellent astronomical instruments, particularly with a large land 

 quadrant of 2 feet radius, made by Cole in Fleet-street, with which he took the 

 correspondent altitudes of the sun to adjust his watch (which was furnished with 

 a hand to distinguish seconds) to the apparent time. Mr. Hancock himself 



