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XXV (06) 684
.XXVIII (09) 455, 458

Hysteresis, angle relation to hysteresis loop area..
exponent, variation with flux density..
loop area relation to hysteretic angle of

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from exciting current wave...

XXV (06) 684
.....xxv (06) 675

plotted from exciting current wave... .XXIX (10) 844

study

losses, effect of direction of rolling.
variation with flux density..

Ice difficulties, Niagara Falls...

troubles, precautions at Niagara Falls.

Ilgner electric hoisting system....
mine hoist, tests.

Illuminants, comparison different types.
Illumination art, practical side....

calculation, including reflection...
diffusing globe, formula for radius..
effect of wandering arc......
experimental room, equipment.
indoors, requirements
industrial plants

intensity, drafting rooms.

indoor targets

machine shop

railway cars

intrinsic brilliancy, importance.

light, steadiness, importance..

measurement, direct method.

outdoor, characteristics of arcs..

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methods of operating illuminants.

primary standards, general characteristics..

retinal persistence, value

street, incandescent lamps, advantages.
minimum intensity

75

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....XIX (02)

14

relation between size and spacing of

arc lamps

small vs. large units.

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study, equipment of room.

units

visual usefulness, criterion..

XIX (02) 16
XIX (02)

9

Illinois Central Railway Co. dynamometer car, description..XIX (02) 867

Steel Co., Gary Plant (see Gary Plant).

South Chicago power plant, description. XXIV (05) 55

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Indiana Union Traction Co. distribution system, tests.... .XXII (03) 243

energy consumption, tests.... XXII (03) 181

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.XXV (06) 888

transmission line, formula... XXIII (04) 663; XXVI (07) 163

theory

Induction, alternators, effect of slot shape.

electromagnetic, electronic theory.

Faraday's law

.XXIII (04) 661

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general law

.XXVII (08) 1352

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.XXVII (08) 1342

ment

J. J. Thomson's statement of

Maxwell's statement of law. XXVII (08) 1341

generators (see Generators, a. c. induction).

magnetic, parabolic law, derivation...

motors (see Motors).

regulator (see Regulator).

watt-hour meter (see Meter, watt-hour).

..xxv (06) 707

Industries, electrical, distribution of capital in U. S.....
....XXIX (10) 650

Instability, general definition

Instruments, ammeters (see Ammeters).

.XXVIII (09) 39

equipment New York Edison Co. generators. XXII (03) 431

railway substation

frequency meter (see Meter).

high-tension, electrical properties..

inaccuracy, cost

jewel pressure in practice.

power-factor meters (see Power-factor meters).

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d. c. standardizing in place.

equipment, Niagara Falls plant.XVIII (01) 497

location

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effect of duration of charge on capacity. XXIX (10) 1612

duration of charge upon insu-

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potential distribution

.XXVIII (09)

210

insulation resistance change with

temperature

temperature, maximum limit..

rubber, insulation resistance change

with temperature.... XXIV (05) 404
temperature, maximum limit...xxII (03) 420
Russel's grading formulas....... ..XXIX (10) 1557
stress distribution, effect of temperature. XXIX (10) 1566
thickness used in various high-tension

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.XXVII (08) 1504

.XXVIII (09) 209

.XXVIII (09) 236

potential distribution..

.XXVIII (09) 235

gradient, equations. xxvIII (09) 241

weak spots

.XXVIII (09) 221

conductance, effect of stress distribution. .....XXIX (10) 1564

laws

corona phenomena (see Corona).

.XXIX (10) 1607

deterioration with number of lightning strokes..xxv (06) 390
dielectric strength, relation to duration of

stress

time element

disruptive stroke tests....

early experiments on dielectric strength.
effect of joint in dielectric circuit..

.XXVI (07) 1204
XVIII (or) 423

....xxv (06) 379

.XXIX (10) 1608

.XXIK (10) 1585

generators, graded

XXIX (10) 1593

graded, design curves.

XXIX (10) 1560

effect of dielectric energy

XXIX (10) 1605

formulas

.XXIX (10) 1577

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puncture e. m. f. as index of quality..xxv (06) 214, 221
different qualities. ...XXV (06) 218

resistivity, heat

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.XXV (06) 226
xxv (06) 199, 230

para

.....xxv (06) 211

temperature coefficient of capacity as
index of quality..

temperature coefficient of resistivity
as index of quality......
wire, insulation resistance tests.

puncture tests

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choice of potential..xxv (06) 203

stress distribution, effect of temperature..

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XIX (02) 1050
.XIX (02) 1049
.XXIX (10) 712
.XXVIII (09) 220

e.m.f..xxIx (10) 860

effect of triple frequency
extra, on end turns, construc-
tion
graded

reinforcement of end turns.

weatherproof, life out-of-doors...
wire, capacity measurement......

..XXVI (07) 1174

XXIX (10) 1602

.XXVI (07) 1175

XXII (03) 761

XXVI (07) 999

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specific capacity of different types, tests. .XXVI (07) 1005

thickness for various surface stresses,

table

XXVI (07) 173

Insulators, behavior under lightning conditions...
brush discharge, effect on insulation quality.
charge accumulation tests....

distribution of stress, mechanical analogy.
effect of strains on dielectric strength.
entry, construction, 50,000-volt...
failures, record, Taylor's Falls line..
glass, relative advantages of lead and
heating caused by potential strain...
line, arcing rings, tests....

cost

design for early Niagara line.
factors

dew test

dimensions, degree of accuracy.
dielectric stress distribution.

dirt, effect on insulation....

.XXVII (08) 426
....XXII (03) 356

XXV (06) 369
.....XXIX (10) 1587
..XXIX (10) 1618
XXII (03) 325
.XXVII (08) 407
potash... XXI (03) 312
XXII (03) 354
.XXIX (10) 593
.. XXIII (04)

544

XVIII (01)

514

.XXIII (04)

160

.XXVII (08) 954

.XXVII (08) 957

..XXIII (04) 162

XXI (03) 316

effect of blast from steam locomotives... XXVII (08) 1620

fog

equivalent circuit diagram

experience

of Pacific Gas & Electric Co.. XXIX (10) 718

factor of safety, choice..

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XXIV (05) 351

under wet and dry conditions....xxvII (08) 880

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