296 MITCHILL ON THE EARTHQUAKES OF 1811, 1812, AND 1813. 



sions. It seemed, however, as if the Maryland side of the Potomac, 

 and the ridge of the Alleghany, might almost be deemed the limits of 

 their extension; the more considerable proofs of their power having 

 been to the westward of the latter, and to the southward of the former, 

 of those boundaries. 



On the 23d of January, the earthquakes were renewed, to greater 

 extent than before, and in some places with increased violence. 



One was felt at Washington, about nine a. m., and the witnesses 

 of the concussion were very numerous. The phenomena very much 

 resembled that of the 16th of December. A few recitals will answer 

 all the purposes of information. 



At Nottingham, in Maryland, the shock was alleged to have hap- 

 pened twenty minutes after nine, and to have lasted a minute. The 

 writer of the account was sitting in a room with two other persons, 

 occupied in reading, when it was asked by one of them what made the 

 chamber shake so ? This qalled the attention of them all to the move- 

 ment, which they described as having the same effects as the rolling of 

 a vessel on an agitated sea. 



The inhabitants of Richmond (Va.) felt it severely at half after nine. 

 Like the former, it was more sensible on Shockoe and Richmond hills, 

 than in the lower parts of the city. In some instances, books were 

 nearly thrown from their shelves, and many persons at breakfast preci- 

 pitately left the tables. 



At Cashockton, in the state of Ohio, on the morning of the 23d of 

 January, at Georgetown, Louisville, Chilicothe, Paris, Washington, and 

 Frankfort, the shocks excited a great share of attention. 



At Charleston, (S. C.) on the same morning, to wit, of the 23d of 

 January, at fifteen minutes after nine o'clock, the vibratory shock of an 

 earthquake was felt more severely than on the former occasions. 



