in a similar state to itself.

64. In some cases it has been supposed that, under such circumstances,
attractive and repulsive forces have been exhibited, i.e. that such bodies
have become slightly magnetic. But the phenomena now described, in
conjunction with the confidence we may reasonably repose in M. Ampere's
theory of magnetism, tend to throw doubt on such cases; for if magnetism
depend upon the attraction of electrical currents, and if the powerful
currents at first excited, both by volta-electric and magneto-electric
induction, instantly and naturally cease (12. 28. 47.), causing at the same
time an entire cessation of magnetic effects at the galvanometer needle,
then there can be little or no expectation that any substances not
partaking of the peculiar relation in which iron, nickel, and one or two
other bodies, stand, should exhibit magneto-attractive powers. It seems far
more probable, that the extremely feeble permanent effects observed have
been due to traces of iron, or perhaps some other unrecognised cause not
magnetic.

65. This peculiar condition exerts no retarding or accelerating power upon
electrical currents passing through metal thus circumstanced (20. 33.).
Neither could any such power upon the inducing current itself be detected;
for when masses of metal, wires, helices, &c. were arranged in all possible
ways by the side of a wire or helix, carrying a current measured by the
galvanometer (20.), not the slightest permanent change in the indication of
the instrument could be perceived. Metal in the supposed peculiar state,
therefore, conducts electricity in all directions with its ordinary
facility, or, in other words, its conducting power is not sensibly altered
by it.

66. All metals take on the peculiar state. This is proved in the preceding
experiments with copper and iron (9.), and with gold, silver, tin, lead,
zinc, antimony, bismuth, mercury, &c. by experiments to be described in the
fourth part (132.), admitting of easy application. With regard to iron, the
experiments prove the thorough and remarkable independence of these
phenomena of induction, and the ordinary magnetical appearances of that
metal.

67. This state is altogether the effect of the induction exerted, and
ceases as soon as the inductive force is removed. It is the same state,
whether produced by the collateral passage of voltaic currents (26.), or
the formation of a magnet (34. 36.), or the mere approximation of a magnet