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ALPHABETICAL INDEX.

The references are to the Articles.

A.

coated plate of glass so called, "First
got" 589, 592; Nairne's 593, 314

Double 333, 451, 455, 461, 478, 483,
487, 489, 491, 508, 509, 533, note 35
bsorption, electric 523, note 15
ccuracy of measurements 261
djustment of charges of coated plates
$316

Epinus (Franz Ulrich Theodor. b. 1724,
d. 1802) 1, 134, 340, 549
Epinus' experiment 134, 340, 549
ir between plates not charged 344,
345, 511, 516; communication of
electricity to 118-125, 208, note 9;
electric properties of 99; electrified
117, 256; molecular constitution of
97 and notes 6 and 18; electric phe-
nomena illustrated by means of 206;
plate of 134, 340, 457, 517, 560
Alder 590

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Basket salt 628
Battery of Florence flasks 521; of 49
jars 411, 432, 581; Nairne's 585, 616
Beccaria, Giacomo Battista (1716–1781)
136

Beech 590, 609

Bees'-wax 336, 371, 376
Bird's instrument, 459
Blighted straw 564

Brass plate of trial plate 297
Brass plates 511, 516

Breaking of electricity through plates

520

C.

Calc. S. S. A. 626, 694 and note 34
Calibration of tubes 382, 383, 632-635
Calipers 459

Canal 40, 68, 69; bent 48, 49, 84-95
and note 3

Canton, John, F.R.S. (1718--1772) 117,

205

Cement 303, 484, 497
Centre of suspension 388
Chain 425, 428, 431

Chain machine 433, 605, 613

Charge defined 237; does not depend
on material 68; of similar bodies as
diameters 71; of thin plate inde-
pendent of thickness 73; of conden.
sers not affected by other bodies 317,
443, 555; of coated plates greater
than by theory, 332; intended' 316;
'computed' 311, 326, 377, 458; 'real'
313, 377; with strong electrification
356, 357, 451, 539; with weak 358,
463, 539; with negative 463; effect of
temperature, 366; measurements of,

see Tables; of battery 412; divided
288

Charging jar 223, 225

Circles 273

Circuit, divided 397, 417

Coated plates 300, 314, 441; theory of,

74, 160, 169; lists of, see Tables
Coatings, electricity does not reside in
133

Column 145-147

Communication 100, 219; of charge to
battery 414, 618

Comparison of charges 236

Compound plate 379-381, 560, 677—
679

Compression (or pressure) 179; distin-

guished from condensation 200
Computed charge 311, 312
Condensation distinguished from com-
pression 200

Conduction by hot glass 369

Conductivity 469, 491; of straws 565
Conductor defined 98

Cone, attraction on particle at vertex 7
Conical point, escape of electricity from
124 and note 9

Contact 306; impossible 196 note; of
brass and glass 541, 558

Copper wire, resistance of 636–646
Cork balls 116, 117, 441, 451
Counterpoise 295

Crown glass 301, 330, 378, 411, 430,
585, 595

Cylinder 54, 148-151; charge of 281,
285-287 and note 12; two 152 and
note 13; glass coated 382, 454, 479;
large tin 358, 539 and note 25

D.

D, coated plate 483, 487
Deal 590, 609

Deficient fluid 67, note
DEFINITIONS:

Canal 40

Charge 237

Communication 100
Compression 199
Computed charge 311

Condensation 200
Conductor 98

Deficient fluid 67, note
Distance of spreading 328
Electrification 102, 201
Immoveable fluid 12

Inches of electricity, circular 458, 648;
globular 654; square 648, 654
Incompressible fluid 69

Insulation 100
Non-conductors 98
Observed charge 325
Overcharge 6, 201
Real charge 313
Redundant fluid 13
Saturated body 6
Undercharge 6

Degrees of electrification 329, 356; of
electrometer 560, note

Dephlegmated wax 371, 375, 518
Discharge, divided 397, 417, 576, 597,613
Distance to which electricity spreads
309, 323, 328

Dividing machine 341, 459, 517, 591
Divisions of trial plate 297
Double plates 333

E. and F. 457

E.

Earth connexion 258, 271

Electric organ of torpedo 396, note 29
Electricity an elastic fluid 195; diffused
through bodies not electrified 216;
inches of 647, 648

Electrification, degree of 102, 201 and
note 7

Electrodes, large 258, 271
Electrometer:

Cavendish's discharging 402, 405, 427,
430, 434

gauge (paper cylinders) 224, 248, 295,
495, 511, 524, 542, 559; new wood
525, 563

Divisions of 560, note

Henly's 559, 568, 570, 571, 580; on
rod 569

Lane's 263, 329, 559, 569, 570, 571,

580, 589, 603, 604

Paper cylinders 486
Pith ball 581

Straw 249, 404, 559, 570, 571, 581;
with variable weights 387; corks
441, 451, 566

Testing 244, 296, 358, 359
English plate glass 301, 496
Equivalent thickness of compound plates
379

Error, greater with coated plates than
with simple conductors 299; probable
of estimation of capacity 250, 261;
in Exp. I. 234; due to unequal charg-
ing 250

Excess of redundant fluid in coated

plates 560 and note 30

Experiment I. 218, 233, 291, 512, 562
and note 19

II. 235, 292, 561
III. 265, 467

IV. 269, 293, 471, 480, 481
and note 20

V. 273, 447, 448, 452, 454,
472, 473, 474, 475, 681
and note 21

VI. 279, 453, 476, 477, 683
VII. 281, 448, 478, 682 and
note 13

VIII. 288, 542 and note 23

F.

Fair straw 564

f. alk 627, 694

Flannel 514

Floor, effect of 335

Florence flask 521; battery 521

Fluid, electric 195, 216, note 1; real 91;
incompressible 69, 94, 236, 273, 276,
278, 294, 348 and note 3

Force near an electrified surface 154;
inversely as square of distance 232,
512, 513, 562 and note 17

Fore and back room 469
Frame placed below circles 274
Frames 221

Franklin, Benjamin, F.R.S. (1706-
1790) 350 note, 363

Fringe of dirt on coated plates 308, 326,
538

G.

Garden, copper wire stretched round

643

Gauge electrometer 224, 248

General conclusion 291
Gilt straws 249, 394, 567

Glass, different electric qualities of 301,

322

Glass house 378

Glauber's salt 626, 694

Globe, charge of compared with that of
circle 237, 282, 445, 455, 456, 654,

681, 687, note 35

Globe, electrified 20-27, 280; capacity
of 281, 282; compared with double
plate 333, 334

Globe, meaning the world 214

Globe of electrical machine 248, 495,
563, 568, 569

Globe within hemispheres 218, 512, 562,
note 19

Globes, coated 523, 542, 559, 563
Gradual spreading of electricity 302
Guide for the eye 249, 525, 571
Gum lac 371, 374, 376
Gymnotus 437, 601

H.

Hamilton, Dr, Prof. of Philosophy,
Dublin (Priestley, p. 429) 126

Heat, effect on charge of glass, &c. 366,
368, 518, 519, 556, 680, note 26
Heat produced by current 212
Height and size of room 335
Hemispheres 219

Henly (William, F.R.S., d. 1779); linen
draper in London; his electrometer
559, 568, 569, 580

Hissing noise before spark 213

Hot glass a conductor 369, note 26;
compared with cold 366, 368
Hunter (John, F.R.S., b. 1728, d. 1793)
436, 601, 614

Hygrometer corks 459; Smeaton's 468;
common 468
Hypothesis 3, 202

I.

Immoveable fluid 12, 351

Inches of electricity 458, 648, 654
Incompressible fluid 40, 236, 273, 276,
278, 294, 348 and note 3

Increase of charge of globe due to in-

duction 339, 652 and note 24

Induction 44-47, 175-194, 277, 287,
202 sq., 275, 277, 288, 334, 335; cal-
culation of 338

Instantaneous spreading of electricity
307, 319-323, 326
Insulation 100

Iron, conductivity of 398, 576, 687, note

32

J.

Jar 223; capacity of jars 573, 581

K.

Kinnersley (Ebenezer, Physician in Phil-
adelphia, b. 1712) 126, 136, 213; see
new experiments of electricity, Phil.
Trans. 1763, 1773

Knob for discharging 511, 572

L.

Lac 371, 374, 376, 518, 520

Lac solution 494

Lane, Timothy, F.R.S. (b. 1734, d. 1804)
136, 213, 601

Lane's electrometer 263, 329, 540, 514,

559, 569, 570, 571, 580

Law of electric force from Exp. I. 291,
note 19

Leakage, electric 260, 264, 393
Leather 608

Leyden vial 128, 206, 313, 363, 389
Light, Newton's fits 354

Light round the edge of coating 307,

326, 532; brightest at first charging,
310

Limetree wood 588, 611

Linen thread 244

Lines of discharge of torpedo 400
Link 602

Loops of chain 433, 605

M.

Machine for trying coated plates 295,
337, 340, 366, 495; new for measuring
thickness 517

Machine, electric 212

Magazine of electricity 207, 521, 563
Mahogany 590

Matter 4

Maximum density of electric fluid 20
and note 1

Measurements of apparatus 219, 255,

273, 275, 466, 472
Mechanism for Exp. I. 222
Mercury 366

Metals, conducting power 397, 398
Method of trying charges 241, note 17
Method of the work 2

Michell (Rev. John, F.R.S., d. 1793) 354
Mineral water warehouse 415
Moist wood 392

Moment, statical 388

Moveable electricity in glass 350
Moveable fluid 12, 350

N.

Nairne, Edward, F.R.S., d. 1806; Mr N.
601; plates from 482 (315); jar 568;
electric machine 559, 568; his own
large one 580; his manner of lacquer-
ing 496; his batteries 585, 616
Needle discharger 572
Negative electrification 463
Newton 18, 19, 97

Newton's fits 354

N. O. P. Q. 459, 462, 592
Nuremberg glass 301, 376, 497

0.

Oblong, charge of 281, 479; coatings
320

Oil of vitriol 626, 694
Overcharge 6

P.

pratio of charge spread uniformly on
disk to that collected in circumference
140; estimated value by experiment
276, 281, 289

p-ratio of circumference of circle to
diameter 594

Penetration of electric fluid into glass
132, 169-174, 332, 339, 349, 355, 363
Pensylvania, Phil. Soc. of 437
Pith ball electrometer 220, 240, 244,
358, 359

Plate air 134, 340; concave 155; circu-
lar 55-65, 140; thin 73

Plates, coated, lists of 315, 324, 325,
370; theory of 129; two circular 74,
82, 141-144

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Repulsion 106; of balls as square of

redundant fluid 386, 525, 563
Repulsion, effect of too great 49
Resistance, electric, varies as length of
conductor 131; what power of ve-
locity 574, 575, 629, 686; effect of
heat on 619, 620, 690

Richard 511, 565
Ronayne, Thomas 601

Rosin 336, 371, 461, 464, 488

Rosin varnish 497; experimental 514,

520, 548; plates 518, 555, 560, 594
Roughness dissipates electricity 387
Rows of battery 581

Rules for trial plates 592; for strength

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Spark, electric 135-139, 212; none from

torpedo 401; length does not depend
on number of jars 402, 604, note 10
Specific gravity of salt water 587, 588
Specific inductive capacity 332, 339,
notes 15, 27

Spherical shell 18, 19
Spirit of salt, 627, 694
Spirit of wine 524, 631

Spreading of electricity 299-367, 484,
485, 512; gradual 494-500
Springing wire 296

Square, charge of 282, 283, 479 and note
22; plates of various substances 269
Steam, cause of explosion by lightning
137

Stool, electric 420, 612

Strata, conducting, in glass 351, 354
Strength of electrification 355; effect on

capacity 356, 451, 463, 539

System of coated plates 316

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