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Insulators, (continued)
pins, charring, photographs..

XXI (03) 253 prevention

......XXI (03) 292 cost

XXIII (04) 544 design

xxI (03) 263, 305 diameter calculation, formula.

XXI (03) 234 dimensions

XXI (03) 265, 268 eucalyptus, strength

...XXI (03) 300 treating, method.

.XXI (03) 267 fastening for high-tension lines. XXIII (04) 585 fiber stresses

.XXI (03) 233 iron, construction

..XXI (03) 272 locust, strength..

.XXI (03) 299, 300 tests

.XXI (03) 266 material for high-tension lines. .XXIII (04) 585 oak, strength

...XXI (03) 300 steel grounded vs. wood.

.XXVI (07) 1252 standard dimensions

XXI (03) 234 strength

XXVII (08) 941 tests

.XXI (03) 269, 272 Niagara Falls pole line....XVIII (01) 520 treatment for high-tension lines.. XXIII (04) 585 wooden, charring, photographs.

.XXI (03) 253 insulating value

.XXI (03) 289 vs. steel grounded.

XXVI (07) 1252 potential strains, classification...

.XXII (03) 354 section, catenary construction, types.. .XXIX (10) 1004 steady strain, catenary construction, types....XXIX (10) 1000 strain, 600-volt, specification, N. Y. C. R. R... .XXIX (10) 1035

11,000-volt, specification, N. Y. C. R. R..xxix (10) 1034 Brooklyn type, breakdown e. m. f..... XXII (03) 239 catenary construction, types.

..XXIX (10) 1002 composition .....

...XXII (03) 240 e. m. f. breakdown, tests.

XXII (03) 234 general specifications

XXII (03) 239 globe type, breakdown e. m. f..

XXII (03) 239 tensile strength..

XXII (03) 239 goose egg, mechanical strength, test. ...XXIX (10) 973 ideal

XXIX (10) 970 insulation resistance, tests.

XXII (03) 237 link type

.XXVI (07) 1268 moulded, depreciation

XXIX (10) 974 specifications

..XXII (03) 241 tensile strength, tests.

...XXII (03)

232 wooden, advantages

.XXIX (10) 974 telephone for circuits paralleling high-tension lines

.xxix (10) 723 tests, e. m. f. application methods.

XXII (03) 365 measurement

.XXII (03) 365 regulation

..XXI (03) 312 precautions

.XXII (03) 357 trolley, heating tests.

.XXII (03)

235 Insurance, reliability, cost analysis....

XXVIII (09) 65 Inter. Rapid Transit Co. double-grate boiler construction..XXVI (07) 1716 experience, high-tension cables...XXII (03)

433 high-tension cable, trouble record.xxvII (08) 1534 power plant, description.... XXIX (10) 183

Inter, Rapid Transit Co. (continued)

record of performance of signal
system

XXIV (05) 590 subway signal system. .XXVI (07) 1543 International Telegraph Conference, objections to regulations

XXVII (08) 619 Inter poles (see Commutating poles). Interrupter, static (see Static). Wehnelt, mode of operation...

XIX (02) 293 Intrinsic brilliancy, experiments under various daylight conditions

XIX (02) physiological importance

.XIX (02) 8 Inventing as a profession...

XXV (06) 520 part of engineer's work.

XXV (06) 542 method of procedure..

XXV (06) 523 Inventions, classification

.xxv (06) 522 definition

XXV (06) 521 pioneer

xxv (06) 543 Inventors, classification

XXVIII (09) 332 compensation

XXVIII (09) 335 lons, nature

XXV (06) 766 negative

.XXVI (07) 949 positive

.XXVI (07) 949 Ionization, theory

XXVI (07) 950 solid dielectrics

XXIX (10) 1582 Iron, cast, magnetization curve.

XVIII (01) 468 tool cutting rates.

...XX (02) 124 conductivity, electric, at high temperatures. XXIX (10) 512

heat, at high temperatures.. XXIX (10) 512, 536 elastic limit of galvanized wire.

.XXIII (04) 514 electrolysis when embedded in concrete, change in resistance

.XXVI (07) 238 electrolysis when embedded in concrete, tests. .XXVI (07) 232 electrolytic, magnetic properties...

.XXV (06) 462, 468 effect of temperature

XXV (06) 464 physical properties

XXV (06) 460 purity obtainable

XXV (06) 460 expansion coefficient

.XXIII (04) 514 losses, aging tests

.XXVIII (09) 466 dynamo electric machines, calculation.. .XXVIII (09) 993 experimental investigation of armatures.....XXII (03) 445 revolving machines, calculation.... XXVIII (09) 1000 tests, errors from wave distortions. .XXVIII (09) 418 sine wave, results.....

.XXVIII (09) 417 specimens, requirements.

. XXVIII (09) 446 wave distortion, cause.

.XXVIII (09) 442 testing apparatus, Bureau Standards. XXVIII (09) 444 commercial methods....

XXVIII (09) 468 Epstein vs. Lloyd methods. XXVIII (09) 468 modulus of elasticity of wire...

XXIII (04) 514 resistance, electric, variation, when embedded in concrete, tests ..

XXVI (07) 238 resistivity, electric, at high temperatures.

xxix (10) 512 temperature coefficient.

xxix (10) 537 heat, at high temperatures. .XXIX (10) 512, 536 temperature coefficient.

.XXIX (10) 537 tarnishing in vacuum, explanation..

XXV (06) 856

74

Iron, (continued)
tensile strength of wire...

XXIII (04) 514 Iron-loss voltmeter...

XXVIII (09) 424, 427 Irrigation, California, typical system, description. .XXIX (10) 737

changes, Mount Whitney Power Co... .XXIX (10) 739 effect on land values...

..XXIX (10) 751 gravity compared with ground water system..XXIX (10) 733 ground water compared with gravity system. .XXIX (10) 733 pumping, load characteristics..

.XXIX (10) 742 power requirements

.XXIX (10) 742 project investment value.

.XXIX (10)

752 relation to hydroelectric plants. XXXVIII (09) 1435, 1471 water power

XXVIII (09) 1363 systems, Imperial, San Joaquin and Sacramento valleys

XXIX (10) 732 Mount Whitney Power Co.. .XXIX (10) 737 Texas

.XXIX (10) 75 Isolated plants, cost of energy production compared with central plants

XXIX (10) 131 Isophotal curves, definition

XX (02) Jablochhoff candle, features.

.XXVIII (09) 16 James river drainage area.

.XXIV (05) 793 rainfall

.XXIV (05) 794 run-off

.XXIV (05) 794 Janesville Electric Co. hydroelectric transmission system, description

XXV (06) 585 Jewel pressure in instrument practice...

.XXIV (05) 245 Johannesburg mines, electric hoisting plant, description...XXIX (10) 291 Johnson adjustable reluctance motor, magnetism distribution

XIX (02) 1138 coil, definition

XXIX (10) 1322 Joubert point-by-point wave meter, description.. .XXIV (05) 186 Jungfrau three-phase railway, description. .XVIII (01) 115; XIX (02) 503 Kal, definition

..XXVII (08) 1588 Kern river transmission line, construction data.

.XXVII (08) 943 Kinematics of train movement.

XXII (03) 135 Kinetic efficiency, definition

XXV (06) 56 Koepe mine hoist, load diagram, calculation.

XXIX (10) 298 Körting gas engine, description..

XVIII (OI) 85 Laboratories, engineering, classification.

.XXIV (05) 1051 instruction, general method.

.XIX (02) 1160 Laminations, armature, thickness, Niagara generator

XVIII (01) 472 Lamps, acetylene burner, construction.

XIX (02) 52 gas, specific consumption.

...XX (02)

107 arc, carbon, a. c. power consumption..

.XVIII (01) 877 enclosed, a. c. candle-power.

XVIII (01) 559 power-factor

XVIII (01) 559 specific consumption...XVIII (01) 559 candle-power curves... ......XIX (02) 30 characteristics

XIX (02) compared with open. XIX (02) 29 d. c. candle-power... XVIII (01)

specific consumption...XVIII (01) 559 illumination curves.

XIX (02) 30 power-factor

XXIV (05) 882

No. 1

20

559

20

Lamps, arc, carbon, (continued)
open, candle-power curves.... .XXVIII (09)

47 characteristics. .XIX (02) 19; XXVIII (09) 4 compared with enclosed........XIX (02) 29 floating length, definition. XXVIII (09) 5 illumination curves

...XIX (02)

30 power-factor

..XXIV (05) 883 specific consumption

..XXV (06) 791 volt-ampere characteristic

.XXV (06) 804 characteristics

.XXV (06) 809 d. c. power consumption..

XVIII (01) 877 effect of wandering arc on illumination. .....XIX (02) 33 electrode feed, drop and light system.. XXVIII (09) e. m. f. variation, maximum..

XXIV (05) 376 flame, characteristics

XXV (06) 811 intrinsic brilliancy

XXVI (07) 628 inverted, method of lighting.

.....XIX (02) 83 Jablochhoff candle, features.

..XXVIII (09) 16 magnets, regulating effect....

XXVIII (09) 6 magnetite, volt-ampere characteristic. ....XXV (06) 804;

XXVIII (09) 40, 48
volt-ampere characteristic, equa-
tion

....XXVIII (09)

44 mercury, volt-ampere characteristics. .XXVIII (09) 47 photometric comparison of open and closed. XIX (02) 29 specific consumption

...XX (02) 107 carbon filament, 220-volt, candle-power. .XXIV (05) 457

English, characteristics. XXIV (05) 457 accuracy in photometrical measurements

.xx (02) candle-power at different specific

consumptions ...XXIX (10) 936 depreciation XXIX (10) 1719 effect of

e. m. f. variation XXV (06) 822

variation with e.m.f..xx (02) 80, 82 characteristics, general... .XIX (02) 47 color composition of light. .XXIX (10) 1726 initial current, oscillogram. XXV (06) 824 intrinsic brilliancy

.XX (02)

72 life, 220-volt

.XXIV (05)

460 resistance

XXIX (10) 931 specific consumption.

....XX (02) 107;

XXV (06) 792 220-volt...XXIV (05) 457 effect of

e. m. f...XXV (06) 822 spectral intensity

XXIX (10) 1073 temperature limit

xxv (06) 791 voltage candle-power, charac

teristic ...... XVIII (01) 560 specific consumption,

characteristic XVIII (01) 561 Edison X-Ray

XXI (03) 337 demonstration

XIX (02)

67 gas, Argand, intrinsic brilliancy..

.XX (02) 72

92

Lamps, (continued) graphitized filament, candle-power depreciation...XXIX (10) 1719

effect of e.m.f.

variation....XXV (06) 822 Aicker tests

XXV (06) 844 resistance

.XXIX (10) 930 specific consumption. .XXIV (05) 847

effect of e.m.f.

variation. ...XXV (06) 822 Hefner (see Light, standards). incandescent, energy efficiency..

.XXV (06) 789 filaments (see Filaments). Aicker, method of overcoming. ...XX (02) 26 first used on war-ship.

.XIX (02) 579 intrinsic brilliancy

XXVI (07) 628 rating, three-voltage plan.. XXIX (10) 914 resistivity, temperature coefficient,

effect on regulation..... XXV (06) 822 mercury vapor (see Arc).

a. C., performance characteristics. .XXV (06) 615 account of development.. XIX (02) 59 Cooper-Hewitt, description. XXII (03) 75 development

XXII (03) 72 early types

...XXII (03) 72 effect of diameter of tube. ...XIX (02) 60

length of tube.. .XIX (02) 60 e. m. f. equation

.XXV (06) 805 loss at negative, effect of temperature

XXV (06) 605 losses in tube.

.XXV (06) 602 variation allowable. XXII (03) 86 first

XXII (03) 71 patent

XXII (03) 72 intrinsic brilliancy

.XXVI (07) 628 life....

XXII (03) 87; XXVI (07) 648 methods of starting.

XXII (03) 82 negative electrode resistance, nature

.XIX (02) 62 performance characteristics. .....XXV (06) 613 specific consumption..xix (02) 59; XX (02) 107;

XXV (06) 613 starting characteristics.

.XXV (06) 606 theory of operation..

.XXV (06) 601 volt-ampere characteristic. .XXV (06) 627

work done by Cooper-Hewitt. XXII (03) 73 metal filament, first commercial.

XXIX (10) 927 method of comparing various kinds..

.XXVI (07) 633 Moore tube, carbon-dioxide, specific consumption.xxvI (07) 620

description Engineering Societies

Bldg. installation..... XXVI (07) 607, 657 feeder valve, construction. ..XXVI (07) 610 operation

.XXVI (07) 610 frequency range

.XXVI (07) 632 installation

.XXVI (07) 624 intrinsic brilliancy

.XXVI (07) 628 length limitation

.XXVI (07) 621 nitrogen, specific consumption. .XXVI (07) 621 photometry

.XXVI (07) 615

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