inductorium
火花感应线圈
火花感应线圈
Induction \
In *
duc "
tion \,
n . [
L .
inductio :
cf .
F .
induction .
See {
Induct }.]
[
1913 Webster ]
1 .
The act or process of inducting or bringing in ;
introduction ;
entrance ;
beginning ;
commencement .
[
1913 Webster ]
I know not you ;
nor am I well pleased to make this time ,
as the affair now stands ,
the induction of your acquaintance . --
Beau . &
Fl .
[
1913 Webster ]
These promises are fair ,
the parties sure ,
And our induction dull of prosperous hope . --
Shak .
[
1913 Webster ]
2 .
An introduction or introductory scene ,
as to a play ;
a preface ;
a prologue . [
Obs .]
[
1913 Webster ]
This is but an induction :
I will draw The curtains of the tragedy hereafter . --
Massinger .
[
1913 Webster ]
3 . (
Philos .)
The act or process of reasoning from a part to a whole ,
from particulars to generals ,
or from the individual to the universal ;
also ,
the result or inference so reached .
[
1913 Webster ]
Induction is an inference drawn from all the particulars . --
Sir W .
Hamilton .
[
1913 Webster ]
Induction is the process by which we conclude that what is true of certain individuals of a class ,
is true of the whole class ,
or that what is true at certain times will be true in similar circumstances at all times . --
J .
S .
Mill .
[
1913 Webster ]
4 .
The introduction of a clergyman into a benefice ,
or of an official into a office ,
with appropriate acts or ceremonies ;
the giving actual possession of an ecclesiastical living or its temporalities .
[
1913 Webster ]
5 . (
Math .)
A process of demonstration in which a general truth is gathered from an examination of particular cases ,
one of which is known to be true ,
the examination being so conducted that each case is made to depend on the preceding one ; --
called also {
successive induction }.
[
1913 Webster ]
6 . (
Physics )
The property by which one body ,
having electrical or magnetic polarity ,
causes or induces it in another body without direct contact ;
an impress of electrical or magnetic force or condition from one body on another without actual contact .
[
1913 Webster ]
{
Electro -
dynamic induction },
the action by which a variable or interrupted current of electricity excites another current in a neighboring conductor forming a closed circuit .
{
Electro -
magnetic induction },
the influence by which an electric current produces magnetic polarity in certain bodies near or around which it passes .
{
Electro -
static induction },
the action by which a body possessing a charge of statical electricity develops a charge of statical electricity of the opposite character in a neighboring body .
{
Induction coil },
an apparatus producing induced currents of great intensity .
It consists of a coil or helix of stout insulated copper wire ,
surrounded by another coil of very fine insulated wire ,
in which a momentary current is induced ,
when a current (
as from a voltaic battery ),
passing through the inner coil ,
is made ,
broken ,
or varied .
The inner coil has within it a core of soft iron ,
and is connected at its terminals with a condenser ; --
called also {
inductorium },
and {
Ruhmkorff '
s coil }.
{
Induction pipe }, {
Induction port },
or {
Induction valve },
a pipe ,
passageway ,
or valve ,
for leading or admitting a fluid to a receiver ,
as steam to an engine cylinder ,
or water to a pump .
{
Magnetic induction },
the action by which magnetic polarity is developed in a body susceptible to magnetic effects when brought under the influence of a magnet .
{
Magneto -
electric induction },
the influence by which a magnet excites electric currents in closed circuits .
[
1913 Webster ]
{
Logical induction }, (
Philos .),
an act or method of reasoning from all the parts separately to the whole which they constitute ,
or into which they may be united collectively ;
the operation of discovering and proving general propositions ;
the scientific method .
{
Philosophical induction },
the inference ,
or the act of inferring ,
that what has been observed or established in respect to a part ,
individual ,
or species ,
may ,
on the ground of analogy ,
be affirmed or received of the whole to which it belongs .
This last is the inductive method of Bacon .
It ascends from the parts to the whole ,
and forms ,
from the general analogy of nature ,
or special presumptions in the case ,
conclusions which have greater or less degrees of force ,
and which may be strengthened or weakened by subsequent experience and experiment .
It relates to actual existences ,
as in physical science or the concerns of life .
Logical induction is founded on the necessary laws of thought ;
philosophical induction ,
on the interpretation of the indications or analogy of nature .
[
1913 Webster ]
Syn :
Deduction .
Usage : {
Induction }, {
Deduction }.
In induction we observe a sufficient number of individual facts ,
and ,
on the ground of analogy ,
extend what is true of them to others of the same class ,
thus arriving at general principles or laws .
This is the kind of reasoning in physical science .
In deduction we begin with a general truth ,
which is already proven or provisionally assumed ,
and seek to connect it with some particular case by means of a middle term ,
or class of objects ,
known to be equally connected with both .
Thus ,
we bring down the general into the particular ,
affirming of the latter the distinctive qualities of the former .
This is the syllogistic method .
By induction Franklin established the identity of lightning and electricity ;
by deduction he inferred that dwellings might be protected by lightning rods .
[
1913 Webster ]
Inductorium \
In `
duc *
to "
ri *
um \,
n .;
pl .
E . {
Inductoriums },
L .
{
Inductoria }. [
NL .,
fr .
E .
induction .] (
Elec .)
An induction coil .
Inductric
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