Induction 
effect (see magnetic induction, below) in to magnetize the 
soft in.ni.il i ill with tin uppioacli .if Hit- magnet this maum-t- 
i.sm iticreaHUH In strength, anil (unaloijoiih to cast; 8, above) 
a current, invrisr ii) the amiMTian rim-rut is inilurcd,anu 
conversely when the magnet itt taken :iu.i\. The prlnct- 
l>le of mlliin- :IMI| il'i-triiiiliiuili'tir < it, I net!,, n an' ll'il ill 
the iiLilurtiim roil (which Heu), in all magneto-electric and 
dynamo electric machines (see under ./.. ///.>, and also in 
the telephone (which see), and In many other devices. In- 
duced currents can be made to have a very high electro- 
motive force, it being In many cases comparable with that 
pnnliiiTii liy a lloltz machine; but this depends upon the 
relative fineness of the wire of the secondary coil :is com- 
pared with that of the primary coil. An electric current 
may also Induce (as when it is made and broken) a current, 
called an fxtra current, in the conductor through which 
it itself passes ; this is called xelf-indttctimi. Magnetic in- 
duction Is the production of magnetic properties In a inag- 
Magnetic Induction. 
netic substance, as a bar of soft iron, by a neighboring 
magnet. The effect of the magnet U to develop the mag 
netic polarity of each molecule of the soft iron, and hence 
to make the whole bar a magnet, with poles reversed as 
compared with the Inducing magnet If several pieces of 
soft iron are placet! near together, the inductive effect is 
transmitted from the first to the second, and so on. The 
magnetic induction in a magnet, or magnetic medium, is 
the force which would exist within a narrow crevice cut 
out of the magnet with its plane sides normal to the direc- 
tion of force. See magnetic. Flow Of Induction. See 
Jtowi. Induction by simple enumeration. See enu- 
meration. Mutual induction, the reaction of two elec- 
tric circuits upon each other, due to variations In the dis- 
tance between them or in the strength of the current car- 
ried by them. Peristaltic induction, a term applied by 
Thomson to the mutual electrostatic induction between 
the wires of a multiple cable. Self-induction, the re- 
action of different parts of the same circuit upon one 
another, due to variations in distance or current strength. 
See def. 6, above. 
inductional (in-duk'shon-al), a. [< induction 
+ -aJ.] Relating to or characterized by induc- 
tion; inductive. 
induction-balance (in-duk'shon-bal'ans), n. 
An electrical device consisting'of two primary 
coils through which an alternating current is 
sent, and two secondary coils so connected that 
the currents induced in them just balance or 
neutralize each other. This condition Is indicated by 
the silence of a telephone connected with the secondary 
colls ; but if the current in one of the coils is varied in In- 
tensity, as by Introducing within It a piece of metal, the 
balance will be disturbed, and this is announced by the 
telephone. The instrument has been used to measure the 
change of conductivity of metals by certain alloys. A sim> 
plifled modification of it was employed to search for a 
bullet In a human body, the proximity of the metal being 
sufficient U disturb the balance. 
induction-bridge (in-duk'shon-brij), n. An in- 
duction-balance arranged in a manner similar 
to a Wheatstone's bridge and used foi' induc- 
tion and other electrical measurements. 
induction-coil (in-duk'shon-koil), . In elect., 
an apparatus for producing currents by induc- 
tion, and for utilizing them. It consists essentially 
of two coils wound on a hollow cylinder, within which is 
a core formed of a bar of soft iron or a bundle of soft 
iron wires. One of the coils (see induction, 6), called the 
primary coil, of comparatively coarse wire, is connected 
with the battery by means of an arrangement for making 
and breaking connection with it, so as to produce tempo- 
rary currents ; the other, the necondary coil, of very tine 
wire, is wound round the first, but carefully insulated 
from it, and in it is generated a current by Induction 
every time the current begins or stops in the primary coil. 
The currents produced by tho induction-coil may have 
a very high electromotive force and hence great power of 
overcoming resistance. With a very large induction-coil, 
in the construction of the secondary coil of which nearly 
300 miles of wire were used, sparks over 4O inches in length 
have been obtained. The induction-coil is often called 
the Ruhmkarfl tail, or inductorium. See transformer. 
induction-machine (in-duk'shon-ina-shen'), . 
A machine for jre.nerating electricity by means 
3069 
of induction: generally applied to machines 
generating static electricity by induction. 
induction-pipe (in-duk'shon-pip), n. In a 
steam-engine, the pipe through wnich the live 
steam passes to the steam-chest. 
induction-port(in-duk'shon-p6rt), ii. Theopen- 
ing from the steam-chest of a steam-engine, 
into the cylinder through which live steam 
flows : also analogously used for similar open- 
ings in air-engines, gas-engines, etc. 
induction-valve (in-duk'shon-valv), n. In an 
engine, the valve controlling the induction of 
live steam to the cylinder. 
inductive (in-duk'tiv). a. [= OF. and F. induc- 
tif = Pr. inductiu = Sp. Pg. inductivo = It. in- 
duttivo, < LL. inductiws, serving to induce or 
to infer, < L. inducere, pp. inductus, induce, in- 
duct: see induce, induct.'] 1. Leading or draw- 
ing; inducing; tempting: with to. [Rare.] 
A brutish vice, 
Inductive mainly to the sin of Eve. 
Milton, P. L., xL 618. 
2. Tending to induce or cause; productive: 
with of. [Rare.] 
They may be probable and inductive of credibility. 
Sir M. Hale, Orig. of Mankind. 
3. In logic, pertaining to or of the nature of in- 
duction : as, inductive syllogism, reasoning, or 
proof. 
To fulfil the conditions of inductive inquiry, we ought 
to be able to observe the effects of a cause coming singly 
into action, while all other causes remain unaltered. 
Jevons, Pol. Econ., p. 20. 
4. Having the character of an induction or 
prologue; introductory. 
The introduction or exposition forms an integral part 
of the action, even if (as with the Greeks) It be presented 
In the form of a Prologue, or (as in some of our older Eng- 
lish plays and in many modern dramas) by means of a sepa- 
rate Induction, or even by an inductive Dumb-show. 
A. W. Ward, Eng. Dram. Lit, Int., p. xi. 
6. In elect. : (a) Able to produce electricity by 
induction: as, inductive force. (6) Operating 
by induction: as, an inductive electrical ma- 
chine, (c) Facilitating induction ; susceptible 
of being acted on by induction: as, certain 
substances have a great inductive capacity. See 
induction, 6. 
Those substances which are good dielectrics are said to 
possess a high inductive capacity. 
S. P. Thompson, Elect and Mag., p. 56. 
Dr. John Hopklnson is pursuing his examination of the 
specific ituiuctiat capacity of oils and other liquids. 
Nature, XXXVII. 303. 
Inductive inference. See induction, 5. inductive 
philosophy, the name given by Bacon to science founded 
on induction or observation ; experimental science. In- 
ductive reasoning. See deductive reasoning, under de- 
ductive. Inductive retardation, in telegraphy, the re- 
tardation of speed, or the slowness of signaling, caused 
by the electrostatic capacity of the line. Inductive sci- 
ence, any special branch of science founded on positive 
observed fact Formerly, when Induction was supposed 
to be peculiarly appropriate to physics and natural his- 
tory, the phrase was usually restricted to those sciences, 
but at the present day it would be understood to embrace 
almost every science, when properly pursued, except 
mathematics and perhaps theology and law. Specific 
Inductive capacity. See capacity and induction. 
inductively (in-duk'tiv-li), adv. In an induc- 
tive manner ; by induction or inference. 
It [reviling] is utterly useless to all rational intents and 
purposes, and this I shall make appear inductively, by re- 
counting the several ends and intents to which with any 
colour of reason it may be designed ; and then, by show- 
ing how utterly unfit it is to reach or affect any of them. 
South, Works, VIII. vll. 
inductivity (in-duk-tiv'i-ti), n. [< inductive + 
-ity.] The power or capacity for induction; 
specifically, a measure or coefficient of induc- 
tion, as of magnetic induction; specific induc- 
tive capacity. 
When the inductintie* are equal, there is a material 
simplification. Philos. Mag., XXVI. 367. 
inductometer (in-duk-tom'e-ter), n. [Irreg. < 
induction) + Or. fttrpov, measure.] An instru- 
ment used by Faraday for measuring the degree 
or rate of electric induction, or for comparing 
the specific inductive capacities of various sub- 
stances, consisting of three insulated metallic 
plates, placed parallel to and at equal distances 
from one another, each exterior plate being 
connected with an insulated gold leaf of an 
electroscope. 
inductor (m-duk'tor), n. [< L. inductor, one 
who stirs up, an instigator, lit. 'one who leads 
in,' < inducere, pp. inductus, lead in : see induce, 
tajuoi] 1. One who inducts; the person who 
inducts another into an office or charge. 2. 
In elect., any part of an instrument or appa- 
ratus which acts inductively on another or is 
so acted upon. See earth-inductor. 
indulge 
inductorium (in-<luk-t6'ri-um), n.; pi. indue to- 
i-in, iinliii-iiii-iiiiiix (-ii, -umz). [NL. (cf. L. induc- 
torium, a covering), < L. inducere, pp. inductus, 
lead in, bring on: see induce, induct?] Same ati 
induction-coil. 
A large inductorium, capable of giving a spark in air of 
about twenty inches in length. 
Jour. Franklin Inst., CAM.. >upji., p. 43. 
inductOSCOpe (in-duk'tp-skpp), n. [Irreg. < 
induction) + Gr. aiameiv, view.] An instru- 
ment for detecting magnetic or electric induc- 
tion. 
induct-pipe (in-dukt'pip), n. A pipe which in- 
ducts or lets in air, etc. 
inductile (in-duk'trik), a. [Irreg. < induction) 
+ (elec)tric.'] In elect., acting on other bodies 
by induction, as an electrified body; relating 
to induction. Faraday. 
indue 1 (in-du'), v. t. ; pret. and pp. indued, ppr. 
induing. [Also endue (see endue*)-, < ~L.induere, 
put on (dress), get into, prob. < iiidu, in, < in, 
in: see in 1 . Cf. Or. evdvciv, get into.] 1. To 
put on, as a garment. [Archaic.] 
That with a clean and purified heart 
The Utller I may indue my robe. 
Beau, and FL, Knight of Malta, v. 2. 
By this time the baron had indued a pair of Jackboots 
of large dimensions. Scott. 
2. To clothe ; invest. [Archaic.] 
Indu'd with robe* of various hue she flies, 
And flying draws an arch (a segment of the skies). 
Dryden, IT. of Ovid's Metamorph.. x. 
See where she stands ! a mortal shape indued 
With love and life and light and defty. 
Shelley, Epipsychidlon. 
The more I strove to indue myself in actual righteous- 
ness, the wider gaped the jaws of hell within me. 
if. .//., Subs, and Shad., p. 126. 
indue 2 (in-du'), v. t.i pret. and pp. indued, ppr. 
i ni I n in ij. [A var. 01 endue%, q. v.] 1. To fur- 
nish; supply; endow. 
He it indued, of his liberality. 
With pleasant possessions & large liberty. 
Hub. of Gloucester, 1L 597, App. 
Of those, some were so from their Bourse indeu\l 
By great Dame Nature. Spenser, F. Q., II. IL 8. 
Lords of the wide world, and wild watery seas, 
Indued with Intellectual sense and souls. 
Shalt., C. of K.. ii. 1. 
2f. To inure ; accustom. 
Her clothes spread wide ; 
And, mermaid-like, a while they bore her up ; 
Which time she chanted snatches of old tunes, 
As one incapable of her own distress, 
Or like a creature native and indued 
Unto that clement Shalt., Hamlet, iv. 7. 
induement (in-du'ment), n. [< indue 1 + -ment.] 
Same as enduement. " 
They sit still, and expect gulfts, and prostitute every in- 
duement of grace, every holy thing to sale. 
MUton, Reformation In Eng., i. 
indulge (in-dulj'), . ; pret. and pp. indulged, 
ppr. indulging. [= It. indulgere, < L. indulgere, 
be kind or complaisant to, give oneself up to, 
appar. < in, in, on, + "dulgere, of uncertain ori- 
gin, connected by some with dulcis, sweet, gra- 
cious, by others with Gr. (W./^of, long, Skt. 
dirfiha, long.] I. trans. 1. To be kind or com- 
plaisant to; yield to the wish or humor of; 
gratify by compliance; refrain from restrain- 
ing ; humor : as, to indulge a child. 
ivllmni . . . felt that an ally [like Pitt] so little used 
to control, and so capable of inflicting injury, might well 
be indulged in an occasional fit of waywardness. 
Macaulay, William Pitt. 
i ieorgiana, who had a spoiled temper, a very acrid spite, 
a captious and Insolent carriage, was universally indulged. 
Charlotte llrantr, Jane Eyre, ii. 
2f. To grant, as a favor ; bestow in compliance 
with desire or petition ; accord. 
But we indulge ourselves no such liberties as these. 
Bacon, Physical Fables, ii., Expl. 
Ancient privileges, favours, customs, and acts of grace 
indulged by former kings to their people must not with- 
out high reason and great necessities be revoked by their 
successors. Jer. Taylor, Holy Living, ill. $ 2. 
3. To give way to ; give free course to : as, to 
indulge a propensity or a passion. 
In the first ranks indulge thy thirst of fame ; 
Thy brave example shall the rest inflame. 
Pope, Iliad, XT. 568. 
(They) think if they are abstemious with regard to ... 
wine, they may indulge their other appetites. 
Ooldtnitk, Citizen of the World, Iviii. 
The Indulged, in Scottish hint., those ministers of the 
Presbyterian Church who in the reigns of Charles II. and 
James II. accepted government toleration and protection. 
See indulgence, 6. 
The feud between the Indulged and the " non Indulged " 
took the place of that between Resolutions and Protest- 
ers. Encyc. Brit.. XIX. 683. 
= 8yn. 1. Humor, etc. (see <rrat\fy) ; favor, pamper. 
