howers, appears to have had a _haze_ in his mind while penning this and
other paragraphs."

[The _dictum_ of our correspondent in regard to light passing from
a ponderable medium into a vacuum requires some qualification. An
exception should be made of "Spiritual Mediums," who, being flesh and
blood, are of course ponderable. Now, if we represent the Medium by A,
and the head of any one consulting her by B, there can be no doubt that
the latter is an absolute vacuum; but it is demonstrable that nothing
like light ever passed from the former to the latter. There is a
closer analogy between refracted light and a Brocken spectre than our
scientific friend seems willing to admit. For what follows we refer our
readers to the remarkable essay of Alderman Moon, "On the Identity of
Halocination and Lunacy."]

"9. As our author advances in this branch of his subject, he grows far
too profound for our scientific apprehension. Giving him all credit for
_wishing to be clear_, we confess to a sad mystification as to what he
calls the 'Polarity of Light,' where a beam is described as 'revolving
around poles peculiar to itself' and as producing 'beautiful
_spectres_,' and we want new illumination from him as to his theory of
colors. We agree to the statement that 'each object has a particular
reflecting surface of its own,' as we cannot see how _its_ particular
surface could be the property of another,--but why this should make the
surface 'throw back light at its own angle' we do not exactly fathom,
and we are puzzled to know _which is the owner of the said angle_,
the light or the surface. No one doubts that 'the modest blush which
crimsons the cheek of beauty,' to use the author's words, is caused by a
rush of blood to the skin; but how this produces 'a corresponding change
in its angle of reflection,' and what such a change has to do with the
result, are problems too transcendental for the _exact_ sciences."

[On all questions relating to the Poles we reserve our opinion till the
return of Dr. Hayes's expedition. But we think they have little to hope
from any future attempt at revolution, especially with such insufficient
weapons as their axes, which, though they keep up a constant stir about
them, have been long superseded by the improvements of modern military
science. We think our correspondent hasty in admitting that "each object
has a particular reflecting surface of its own." A little inquiry among
his neighbors would have