r the phenomena of what we call gravity may not be
resolvable into those of magnetism--a force acting at a distance, or
by lines of power. 'There is one question,' continues Mr Faraday, 'in
relation to gravity, which, if we could ascertain or touch it, would
greatly enlighten us. It is, whether gravitation requires _time_. If
it did, it would shew undeniably that a physical agency existed in the
course of the line of force. It seems equally impossible to prove or
disprove this point; since there is no capability of suspending,
changing, or annihilating the power (gravity), or annihilating the
matter in which the power resides.' The lines of magnetic force may
have 'a separate existence,' but as yet we are unable to tell whether
these lines 'are analogous to those of gravitation, acting at a
distance; or whether, having a physical existence, they are more like
in their nature to those of electric induction or the electric
current.' Mr Faraday inclines at present to the latter view. He
'affirms' the lines of magnetic force from actual experiment, and
'advocates' their physical nature 'chiefly with a view of stating the
question of their existence; and though,' he adds, 'I should not have
raised the argument unless I had thought it both important and likely
to be answered ultimately in the affirmative, I still hold the opinion
with some hesitation, with as much, indeed, as accompanies any
conclusion I endeavour to draw respecting points in the very depths of
science--as, for instance, one, two, or no electric fluids; or the
real nature of a ray of light; or the nature of attraction, even that
of gravity itself; or the general nature of matter.' These are
profound views; but we may reasonably conclude, that, however obscure
they may at present appear, they will in time be cleared up and
further developed by the gifted philosopher from whom they emanate.

Of minor matters which have been more or less talked about, there is
the Library for the Working-Classes, just opened in the parish of St
Martin-in-the-Fields--a praiseworthy example for other parishes, but
not to be followed unless the readers actually exist, and manifest the
sort of want which books alone can satisfy. A suggestion has been
made, to use for books in hot climates, where paper is liable to rapid
decay, the sheet-iron exhibited at Breslau, which is as thin and
pliant as paper, and can be produced at the rate of more than 7000
feet to the hundredweight. This w