Efflorescence.
The appearance of a dry salt upon the walls of a vessel containing a
solution above the normal water-line from evaporation of a liquid. It
appears in battery jars and in battery carbons, in the latter
interfering with the electrical connections, and oxidizing or rusting
them. (See Creeping.)
Effluvium, Electric.
When a gas is made to occupy the position of dielectric between two
oppositely electrified surfaces a peculiar strain or condition of the
dielectric is produced, which promotes chemical change. The condition is
termed electrical effluvium or the silent discharge. By an apparatus
specially constructed to utilize the condition large amounts of ozone
are produced.
Synonym--Silent Discharge.
Elastic Curve.
A crude expression for a curve without projections or sudden
sinuosities; such a curve as can be obtained by bending an elastic strip
of wood.
Electrepeter.
An obsolete name for a key, switch or pole changer of any kind.
Elasticity, Electric.
The phenomenon of the dielectric is described under this term. When a
potential difference is established between two parts of the dielectric,
a flow of electricity displacement current starts through the
dielectric, which current is due to the electric stress, but is
instantly arrested by what has been termed the electric elasticity of
the dielectric. This is expressed by
( electric stress ) / ( electric strain )
and in any substance is inversely proportional to the specific inductive
capacity.
Electricity.
It is impossible in the existing state of human knowledge to give a
satisfactory definition of electricity. The views of various authorities
are given here to afford a basis for arriving at the general consensus
of electricians.
We have as yet no conception of electricity apart from the electrified
body; we have no experience of its independent existence. (J. E. H.
Gordon.)
What is Electricity? We do not know, and for practical purposes it is
not necessary that we should know. (Sydney F. Walker.)
Electricity … is one of those hidden and mysterious powers of nature
which has thus become known to us through the medium of effects.
(Weale's Dictionary of Terms.)
This word Electricity is used to express more particularly the cause,
which even today remains unknown, of the phenomena that we are about to
explain. (Amédée Guillemin.)