i bsg OR Sl ea 
Se ee I i ee ee ee en ee a oe ee. Ee eS a a a ee ee Oe ee ee ae naam i ieee eae 
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i 
Mineralogy and Geology. 269 
Ohio —were determined by the relative altitude of the waters of 
the Gulf. The channel of the Lower Tennessee must have been 
sissippi an arm of the sea, by which the flow of the Ohio and Ten- 
hessee was arrested, their channels filled, terraces formed, &c. If 
er Tennessee has, as appears, a channel lower than the 
m 
channel of the lower river. 
4. The Voleano of Kilauea, and great Earthquake Waves ; by 
Rev. Trrus Coan.—I have lately returned from a tour of explora- 
tion to the active crater of Kilauea and the volcanic district of 
Puna. At Kilauea the action was dull, The central area of this 
low its margin; but this margin is a new rim or black ledge of 
I measured, is four-fifths of a mile, and its walls, of black 
the half-cooled forge of Vulcan. The fiery billows no longer roll 
re ey were wont to do over this vast area rat 
> yet, 1 places we could look into red-hot ovens and 
ing, and surging, lashing the sides of the deep cavern, and sending 
up volumes of white sulphur vapors. But now this principal foc 
-on Force 
and Nature—a work whieh gives the completest explanation that 
yet appeared of volcanic phenomena in Hawaii. I spent = 
days at Kil, ea, making careful observations of the crater; and, 
when these were completed, went to the seashore at Ke la-ko-mo 
a village in the volcanic district of Puna, situated about twenty 
