(2) In other similar vessels I put pieces of the same metals in
pairs, a more oxidizable and a less oxidizable metal in each
pair' but separated from each other by strips of glass

(3) Finally, I put in other vessels pairs of different metals
which were placed in immediate contact with each other.

The first two series suffered no marked change, while in the
latter series the more oxidizable metal became visibly covered
with oxide in a few instants after the contact was made.'

Fabroni found that under the above circumstances his oxidizable
metals dissolved in the water, and in some cases salts were
formed which crystallized out. He then compares the metals in
contact with each other in water with the metals on the tongue
when brought into contact, as in Sulzer's experiment, and the
two metals touching each other by which different points on a
nerve were touched to produce the muscular twitchings in
Galvani's experiments, and concludes that the chemical action
upon the metals was the same in each case, and that the other
phenomena observed must have resulted from this chemical
action. It is not strange that when Volta showed later that an
electric current passed between the metals in all of tho above
cases Fabroni should regard the chemical action which he had
previously observed as the cause of this current.

Ten years after the publication of Fabroni's original paper,
Volta wrote a letter to J. C. Delamethrie which was published
in Vol. I of Nicholson's Journal. This letter was written after