1843.] Memoir on Indian Earthquakes. 293 



extent, consistent. At Calcutta the course would appear to be from 

 N. E. to S. W. ; at Pubna from S. E. to N. W. instead of from S. W., 

 as stated before ; at Darjeeling from South to North ; and at Chittagong 

 from the opposite direction. Some of the observations made, as at 

 Barrisaul, do not correspond strictly with this view, but many sources 

 of error exist when sensations are taken as the only guides, and by these 

 it is possible the observations may have been affected. The idea of the 

 circular propagation of the undulations is suggested only as a method 

 of connecting the facts, and farther than it does so, I have no wish to 

 claim any authority for it, the observations on which it is founded 

 being too indefinite generally, to warrant this being done. 



16. Earthquake at Baroda, 1842. 



I regret that I have been unable to ascertain more regarding this 

 Earthquake than that it occurred during the year 1842. I am there- 

 fore able only to record it, a circumstance I regret the more, as Baroda 

 lies in the usual track of the Earthquakes of the Delta of the Indus, 

 and it would have been interesting to ascertain, whether this shock had 

 emanated from that focus, or was independent of it. 



The Register is now completed, and I defer all comment upon the 

 phenomena of the Earthquakes recorded in it, until the completion of 

 the second part of this Memoir, when the phenomena of Indian Earth- 

 quakes generally, will be analysed. 



Remarks on some of the disturbing causes in Barometric Observa- 

 tions. By Captain Shortrede, First Assistant, G. T. Survey. 



If the barometric oscillations were perfectly uniform in different 

 situations, it would obviously be a matter of indifference, theoretically, 

 at what times of the day the observations might be made, provided 

 they were simultaneous. But it is well known to those who have 

 examined the subject, that the oscillations though tolerably uniform 

 in low latitudes, are subject to particular variations, the causes of 

 which are often not easily assigned. Whatever these causes may be, 

 it is by no means likely that their effect will be transmitted in- 



