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 te a turning lathe, and will raise over one hundred Ibs. 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. 
Suerarp 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. Percivat, 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 
