Miscellanies. 399 



20. Earthquake. — An earthquake occurred at Hartford, Conn, 

 on the 12th of April, 1837. It was very slight, yet sufficient to jar 

 all loose articles and swing the pendant lamps ; in one house a bell 

 was made to ring, and some of the inhabitants in that part of the 

 town called Wethersfield lane, ran out of their houses, thinking they 

 were about to fall. 



21. Edmonson's Revolving Magnet. — In the notice published in 

 our last No. of the revolving electro-magnetic machine of Mr. Dav- 

 enport, we forgot to mention that of Mr. Edmonson, of Baltimore, 

 which was figured and described in Vol. 26, at p. 205, of this work, 

 to which the reader is referred. 



22. Electro-magnetic Machine of Davenport ^ Cook. — We are 

 informed that they have constructed a seven inch wheel, with two 

 tiers of magnets in the revolving part, or four crosses, which will be 

 applied to a turning lathe, and will raise over one hundred lbs. from 

 the floor. They find sulphate of copper forms the best excitant for 

 the battery, with which the machine will run a long time, without ex- 

 posing the battery to the atmosphere, or heating the same too much. 



We have not received any drawings or other illustrations, regarding 

 this machine, as was intimated in the report in our last number, that 

 we might now present to our readers. We understand the proprie- 

 tors are not yet ready. 



23. Geological Survey of Connecticut. — The Report of Prof. 

 Shepard on the Economical and Scientific Mineralogy of the State, 

 is now in press in this city, and will shortly be published in accord- 

 ance with the resolution of the General Assembly at its recent session 

 in Hartford. The publication of the Geological Report is deferred 

 until another year, in order to enable Dr. Pergival, the commis- 

 sioner to whom this part of the survey was entrusted, to complete 

 the necessary examinations. 



24. Asia Minor. — M. Texier, in his summary account of the 

 geological construction of Asia Minor, describes the Black Sea, of 

 which it has hitherto been supposed that, in consequence of some 

 violent shock, its waters opened a passage for themselves, and in so 

 doing caused the deluge of Samothracia ; but on examining the two 

 sides of the Bosphorus, M. Texier says, they are of such different 



