ce a spark[A] by its discharge through
charcoal (32.), can only be electricity. As all the effects can be produced
by ferruginous electro-magnets (34.), there is no doubt that arrangements
like the magnets of Professors Moll, Henry, Ten Eyke, and others, in which
as many as two thousand pounds have been lifted, may be used for these
experiments; in which case not only a brighter spark may be obtained, but
wires also ignited, and, as the current can pass liquids (23.), chemical
action be produced. These effects are still more likely to be obtained when
the magneto-electric arrangements to be explained in the fourth section are
excited by the powers of such apparatus.

[A] For a mode of obtaining the spark from the common magnet which I
have found effectual, see the Philosophical Magazine for June 1832, p.
5. In the same Journal for November 1834, vol. v. p. 349, will be
found a method of obtaining the magneto-electric spark, still simpler
in its principle, the use of soft iron being dispensed with
altogether.--_Dec. 1838._

58. The similarity of action, almost amounting to identity, between common
magnets and either electro-magnets or volta-electric currents, is
strikingly in accordance with and confirmatory of M. Ampere's theory, and
furnishes powerful reasons for believing that the action is the same in
both cases; but, as a distinction in language is still necessary, I propose
to call the agency thus exerted by ordinary magnets, _magneto-electric_ or
_magnelectric_ induction (26).

59. The only difference which powerfully strikes the attention as existing
between volta-electric and magneto-electric induction, is the suddenness of
the former, and the sensible time required by the latter; but even in this
early state of investigation there are circumstances which seem to
indicate, that upon further inquiry this difference will, as a
philosophical distinction, disappear (68).[A]

[A] For important additional phenomena and developments of the
induction of electrical currents, see now the ninth series,
1048-1118.--_Dec. 1838._

S 3. _New Electrical State or Condition of Matter._[A]

[A] This section having been read at the Royal Society and reported
upon, and having also, in consequence of a letter from myself to M.
Hachette, been noticed at the French Institute, I feel bound to let it
stand as part of the paper; but later investigations (intimated 73.
76. 77.) of the laws governing thos