and Art," vol. 37. p. 340.

The manner in which the main currents flow is shown by their early and
unresisted effect in a cornfield, as represented by the dotted lines. The
direction in which the fragments of buildings were carried by the greater
power of the southerly currents is shown also. And so is this irregular
action, where a part of the southerly current broke through the northerly
one, and prostrated two or three trees backward on the north side of the
axis.

[Illustration: Fig. 16.]

5th. This cloud, and its spout, move generally with the course of the
counter-trade in the locality--_i. e._, from some point between S. W. and
W., to the eastward, but occasionally a little south of east, deflected by
the magnetic wave beneath the belt of showers.

6th. Several exceedingly instructive particulars have been observed and
recorded.

_a_. _No wind is felt outside of the track_, as those assert who have
stood very near it, and its effects show.

_b_. The track is often as distinctly marked, where it passed through a
wood, as if the grubbers had been there with their axes to open a path for
a rail-road. The branches of the trees, projecting within its limits, are
found twisted and broken off, or stripped of their leaves, while not a
leaf is disturbed at the distance of a foot or two on the opposite side of
the tree, and outside of the track.

_c_. As the spout passes over water, the latter seems to _boil up_ and
_rise to meet it_, and _flow up_ its trunk in a _continued stream_.

_d_. As it passes over the land, and over buildings, fences, and other
movable things, they appear to _shoot up_, instantaneously, as it were,
into the air, and into fragments. If buildings are not destroyed or
removed, the doors may be burst open _on the leeward side_, and gable ends
_snatched out_, and roofs taken off on the _same side_, while that portion
of the building which is to the windward remains unaffected.

_e_. Articles of clothing, and other light articles, have been carried out
of buildings through open doors, or chimneys, or holes made in the roofs,
and to a great distance, without _any opening_ being made for the air to
_blow_ in.

_f_. If there be a discharge of electricity up the spout from the earth,
like that of lightning, the intense action ceases for a time or entirely.

_g_. Vegetation in the track is often scorched and killed, and so of the
leaves on one side of a tree, which is within the track, while