anything would.

"How then are we going to get the current to it? The wires will be
subject to the same currents. Whatever they do to the matter involved,
the currents will do to the apparatus--except in one case. If that
apparatus is made of _some other kind of matter_, then it wouldn't be
affected. The solution is obvious. Use some of the light-matter. What
will destroy light-matter, won't destroy electricity-matter, and what
will destroy electricity-matter, won't disturb light-matter.

"Do you remember the platform of light-metal, clear as crystal? It must
have been an insulating platform. What we started as our assumptions in
the case of the light-metal, we can now carry further. We said that
electricity-metals carried electricity, so light-metals would carry or
conduct light. Now we know that there is no substance which is
transparent to light, that will carry electricity by metallic
conduction. I mean, of course, that there is no substance transparent to
light, and at the same time capable of carrying electricity by
electronic transmission. True, we have things like NaCl solutions in
ordinary H_{2}O which will carry electricity, but here it's ionic
conduction. Even glass will carry electricity very well when hot; when
red hot, glass will carry enough electricity to melt it very quickly.
But again, glass is not a solid, but a viscous liquid, and it is again
carried by ionic conduction. Iron, copper, sodium, silver, lead--all
metals carry the current by means of electron drift through the solid
material. In such cases we can see that no transparent substance
conducts electricity.

"Similarly, the reverse is true. No substance capable of carrying
electricity by metallic conduction is transparent. All are opaque, if in
any thickness. Of course, gold is transparent when in leaf form--but
when it's that thin it won't conduct very much! The peculiar condition
we reach in the case of the invisible ship is different. There the
effects are brought about by the high frequency impressed. But you get
my point.

"Do you remember those wires that we saw leading to that little box of
the reflecting material? So perfectly reflecting it was that we didn't
see it. We only saw where it must be; we saw the light it reflected.
That was no doubt light-matter, a non-metal, and as such, non-conductive
to light. Like sulphur, an electric non-metal, it reflected the base of
which it was formed. Sulphur reflects the base of which it was