usual scud, running with great rapidity toward the storm. Such a stream of
fog blew with great rapidity for thirty-six hours toward the storm which
inundated Virginia and Pennsylvania, in 1852, and carried away the Potomac
bridge at Washington. Such a stream of fog was visible the evening before
the great flood of 1854, which inundated Connecticut, and curried away so
many railroad and other bridges. I have also seen such a stream of fog
running at about the same height, when it was calm at the surface, from
the S. W. toward a violent storm which formed over central New
England--and from the north toward a heavy storm passing south of us. Such
strata form, as far as I have been able to discover, the _middle current_
of storms which are accompanied with very heavy falls of rain. These
double currents are much more common than is supposed. East of the
Alleghanies, short and heavy rain storms, which commence north-east,
hauling to the south and lighting up about mid-day _after a very rainy
forenoon_, frequently have a S. E. or S. S. E. middle current of this
character, which involves the whole surface atmosphere when the storm has
nearly passed, and the N. E. wind dies away, and the wind seems to haul to
the S. S. E. and S.; so that it is rather the prevalence of a _different_
and _coexisting current_, than a hauling of the _same wind_, which marks
the period of lighting up in the south.

Sometimes the easterly wind will set in and blow a day or two before the
border of the storm reaches us. Sometimes the storm is passing, or will
pass, in its lateral southern extension, south of us, and the
condensation in the trade extends over us sufficiently dense to induce an
easterly current beneath it, but not dense enough to drop rain, and then
we have a dry north-easter. I can not, within the limits I have
prescribed, allude to all the peculiarities attending the induction and
attraction of an easterly wind, by the storm in the counter-trade. They
are readily noticeable by the attentive and discriminating observer, and
their existence and cause is all with which I have to do at present.

Winds from the north, or any point from N. N. E. to N. N. W., are
comparatively infrequent in the United States, east of the
Alleghanies--though it is otherwise in the vicinity of the great lakes.

Sometimes the wind "backs," as sailors term it, during a N. E. storm, from
the N. E. through the N. N. E., N., and N. N. W. to N. W. When this takes