I find that strontian is much more extensively interspersed through the
rock formations of this region than I had heretofore conceived. At the
foot of the rapids of this river, there are extensive strata of
carbonate of lime, sufficiently charged with magnesia to destroy all
vegetation, when converted to the state of quicklime; although Dr.
Mitchell, in his "Notes to Phillips' Mineralogy," denies to magnesian
carbonate of lime this quality. But I have tested it fully. I rather
think the doctor's mistake must have arisen from a supposition that Mr.
Phillips intended to say that the magnesia, when in combination with
carbonate of lime, and _in situ_, was destructive to vegetation.

_Ohio and Erie Canal_.--"A commissioner of the State of Ohio, with
engineers, is taking levels, examining water-courses, and making
estimates of cost, to ascertain the practicability of making a canal
from Cincinnati up the valley of the Big Miami, and Loromier's creek,
across the summit level, to the Auglaize and Miami of Lake Erie, to the
level of the lake water. These surveys will give us much assistance in
judging of the geological formations between the Lake and the
Mississippi."

_Geology_.--"As an outline sketch, I should say that, from the rock
basin of the Erie-sea to the Ohio River, by the way of Fort Wayne, there
is a ridge, of about 200 feet elevation, of rock formation, all new
floetz, with a covering of from ten to seventy feet of pulverulent
earth. At the summit this layer is twenty feet. That the Miami and
Wabash have cut their courses down to the rock, with only here and there
a little sand and gravel upon its surface. As far as conjecture will go,
for the levels of the strata on the Wabash and Miami, the same
mineralogical characters are to be found in the strata, at the same
elevation. This would be an important fact to be ascertained, by the
levels accurately taken."

"I am pleased that you have not abated your usual industry in the
pursuit of knowledge in the science of geology and mineralogy, first in
magnitude and first in the order of nature."

_Morals of Green Bay_.--J.D. Doty, Esq., Judge of the District, reports
(Oct. 15th) that the Grand Jury for Brown County, at the late special
session of court, presented forty indictments! Most of these appear to
have been petty affairs; but they denote a lax state of society.

John Johnston, Esq., writes (Oct. 30th): "Since the arrival of the mail,
I have been the constan