perceiving no
collision at present between them and the views I have taken.

[A] Philosophical Transactions, 1834, p. 213.

1306. Finally, I beg to say that I put forth my particular view with doubt
and fear, lest it should not bear the test of general examination, for
unless true it will only embarrass the progress of electrical science. It
has long been on my mind, but I hesitated to publish it until the
increasing persuasion of its accordance with all known facts, and the
manner in which it linked together effects apparently very different in
kind, urged me to write the present paper. I as yet see no inconsistency
between it and nature, but, on the contrary, think I perceive much new
light thrown by it on her operations; and my next papers will be devoted to
a review of the phenomena of conduction, electrolyzation, current,
magnetism, retention, discharge, and some other points, with an application
of the theory to these effects, and an examination of it by them.

_Royal Institution,
November 16, 1837._

* * * * *

_Supplementary Note to Experimental Researches in Electricity._

_Eleventh Series._

Received March 29, 1838.

1307. I have recently put into an experimental form that general statement
of the question of _specific inductive capacity_ which is given at No. 1252
of Series XI., and the result is such as to lead me to hope the Council of
the Royal Society will authorize its addition to the paper in the form of a
supplementary note. Three circular brass plates, about five inches in
diameter, were mounted side by side upon insulating pillars; the middle
one, A, was a fixture, but the outer plates B and C were moveable on
slides, so that all three could be brought with their sides almost into
contact, or separated to any required distance. Two gold leaves were
suspended in a glass jar from insulated wires; one of the outer plates B
was connected with one of the gold leaves, and the other outer plate with
the other leaf. The outer plates B and C were adjusted at the distance of
an inch and a quarter from the middle plate A, and the gold leaves were
fixed at two inches apart; A was then slightly charged with electricity,
and the plates B and C, with their gold leaves, thrown out of insulation
_at the same time_, and then left insulated. In this state of things A was
charged positive inductrically, and B and C negative inducteously; the same
dielectric, air, being in t