properties

testing
viscosity

Ontario Power Co., transmission system, line troubles..

Ore handling equipment of Gary plant.

machine, braking

motors, speed control
power requirements

unloaders, power requirements

speed control system

Organic products, electrolytic production.

Orsat, flue gas analyses, description

Oscillations, free, equations

generation, methods

XXIII (04) 178

XXIII (04) 184

.XXIX (10) 1190

XXIX (10) 1205

XXIX (10) 1190
XXIX (10) 576
.XXVIII (09) 118
.....Xx (02) 297
.XXVIII (09) 903
.. XXVIII (09) 118
XXVIII (09) 117, 157
.XXVIII (09) 943
....XIX (02) 288
.XXVI (07) 1773

produced by rupture of arc short-circuit.
typical

Oscillograph, Blondel, description

schematic diagram

Duddell, description

errors

first use on high tension lines

General Electric, description
natural period
sensibility

limitations

natural frequency maximum

silver vs. phosphor-bronze vibrating
use in detecting arcing ground

Osmium filaments (see Filaments).

lamp (see Lamps).

resistivity temperature, coefficient..

Owens, curve tracer, description

Oxy-hydrogen, limelight, original
Ozite, conductivity, thermal

.XXIII (04) 406

XXIV (05) 197
XXVII (08) 248
XVIII (01) 442
..XXIV (05) 197
XXIV (05) 205
.XXIV (05) 205
XXVII (08) 1526, 1548

....Xxxv (06) 447
strips..XXIV (05) 205
.XXVII (08) 1557

XXV (06) 822
...XIX (02) 1123
XIX (02) 82
XXIV (05) 403

Pacific Gas and Electric Co., record of service inter-

.XXVIII (09) 1420

ruptions
transmission plant, de-
scription

Light and Power Co., data on 20,000 volt

generators

Paper, dielectric strength, effect of duration of stress
application

Para rubber, definition

Paraffin oil, dielectric strength, transient e. m. f.....
Parallel operation, angular deviation of engine, measure-

ment

.XXIX (10) 706

XXVI (07) 376

XXVI (07) 1187

XIX (02) 693
XXIX (10) 1132

......XVIII (01) 777

displacement for given cross

XVIII (01) 760

XVIII (01) 719, 788

(02) 1128

variation, measurement..XVIII (01) 799; XIX

variation, steam engines,

mathematical study.... XVIII (01) 703
variation steam engine, meas-

urement

variation tests of tanden com-
pound engine

anti-surging device

difficulties, causes with independent

prime movers

................XVIII (01) 720

XVIII (01) 725

XVIII (01) 747

....XVIII (01) 742

XVIII (01) 789

...XVIII (01) 741

character-

XVIII (01) 741

method of over-coming...XVIII (01) 747

division of load, relation to speed char-

acteristic

effect of speed change due to change

of load
regulation
istics

flywheel capacity, calculation XVIII (01) 763, 772

gas engine-driven-generators

gas-engine, speed specifications. in

Parallel operation, (continued)

hydroelectric plants, advantages.. .XXIX (10) 548
general discussion. XXIX (10) 547
speed regulation.XXIX (10)

570

Pearson-Cutcheon static discharger, connection_diagram..XXIV (05) 959

static by-pass for transformer windings....

.XXIII (04) 568

XXVII (08) 1397

XXII (03) 647

XXV (06) 168

pressure required to retard water, calculation...xxv (06) 166
rise behind closing valve, calculation..xxv (06) 167

wave, calculation

time constant, calculation..

.XXV (06) 168

Penstocks, (continued)
velocities

standard

water hammer, protection

prevention.

Pentane lamp (see Light standards).

Permeability, measurement of large field rings..

Phantom transposition

Phase meter (see Meter).

shifter, description

XXIV (05) 812
.XXV (06) 156

.. XXII (03) 631

.XXIV (05) 815; XXVI (07) 183

.XVIII (01) 464

XXIII (04) 679

.XXIX (10) 1536

unbalance, effect on power of induction motors... XXVIII (09) 563

synchronous motors. XXVIII (09)

570

Philippine cable (see Cable).

Phoenix Light and Fuel Co., transmission plant, descrip-

tion

.XIX (02) 851

Phono-electric wire (see Wire).

Phosphorescence, commercial applications..

definition

in nature

substances

Phosphorous, electrolytic production

Photographone, Ruhmer's description

Photometer, Bunsen, candle-power scale, formula.

XIX (02) 292

Weber, objections

.xx (02) 93
.xx (02) 87
XVIII (01) 677

XXIX (10) 1061

.xx (02)

90

incandescent lamp standard, accuracy.

mean horizontal candle-power with Matthews

photometer

Platinum, energy reflected at different wave lengths..
coefficient resistivity, temperature
thermo-e.m.f's.

Platinum-rhodium thermo-e.m.f's.

Plough electric, description

Point-analysis, vector power
Polar diagram vs. clock diagram
Polariphone, characteristics

Poles, bending moment formula.
cedar, life

chestnut, life

concrete, for telegraph lines.

construction practice

iron, cost

.XXI (03)

294; XXIII (04) 526

compared with wood, installed...

early history

juniper, life

requirements for catenary construction..
spacing, catenary construction

steel, cost

top construction, spans 500 to 900 feet

900 to 3,000 feet.
high-tension construction practice..

wooden, cost

life

compared with iron, installed.
disadvantages

.XXIII
in various parts of U. S...
wet-rot, remedy

Pole-face losses, theory and calculation

winding action

Pole-lines (see Transmission lines).

Polonium discovery

properties

Polyphase, distribution (see Distribution).

generators (see Generators).
transformers (see Transformers).
transmission (see Transmission).

Population growth, method of study...

Porcelain, compressive strength

manufacture, limitations

resistance, ohmic

shearing strength

simultaneous electrical and mechanical stresses. XXIX (10) 972

tensile strength

Porous cup, resistance measurement

Potassium chlorate, electrolytic production..

Potential transformers (see Transformers shunt).

Potentiometer, a. c. description

liquid description

Potomac river, maximum flow

water-shed area

Potts synchronizer, description

Poulsen telephonograph, description
duplexing