1843. J Memoir on Indian Earthquakes. 281 



past 9 p. m. A reduction of temperature followed it." I am not 

 aware whether or not this shock extended beyond the valley of Jellala- 

 bad. The perceptible reduction of temperature which followed it, is 

 the only point of interest connected with this shock. 



6. Earthqauke of the 25th July, 1842. 



The immediate vicinity of Delhi alone, appears to have been affected 

 by the shock of the 25th July. How far its effects may have extended, 

 there are no precise data for determining, but it was evidently a mere- 

 ly local convulsion, and probably was felt only within fifteen or twenty 

 miles around the city. The following Extract from the Delhi Gazette 

 of the 27th July, gives an account of the phenomenon : 



" A smart shock of an Earthquake, accompanied by a loud rum- 

 bling noise, woke the inhabitants of Delhi from their sleep at about 

 a quarter to four on the morning of the 25th. It did no damage that 

 we have heard of." 



7. Earthquake of the 7th September, 1842. 



This Earthquake was experienced at Mussoorie in the Himalayas. 

 The shock was very slight, and occurred during a severe storm at lh. 

 58m. p. m. The nature of the Earth's motion was vertical, and the 

 vibration single. The direction appeared to be from West to East, 

 the duration of the shock was estimated at five seconds. It was not, 

 to the best of my knowledge experienced in the Deyrah Dhoon, or any 

 where in the Plains, as might have been anticipated from the slight- 

 ness of the shock at Mussoorie. 



Having been informed that at the moment of the occurrence of this 

 Earthquake, Dr. Anderson of the Horse Artillery, had experienced sen- 

 sations precisely similar to those accompanying an electric shock, I 

 felt anxious to verify this interesting fact, and accordingly wrote to Dr. 

 Anderson on the subject, who obligingly favoured me with the follow- 

 ing reply :— 



2 p 



