Index to Cavendish Manuscripts 



Light round the edge of coating, 307, 326, 



532; brightest at first charging, 310 

 Linen thread, 244 

 Lines of discharge of torpedo, 400 

 Loops of chain battery, 43^, 605 



Machine, electric, 242 



Machine for trying coated plates, 295, 337, 

 340, 366, 495 ; new for measuring thick- 

 ness, 517 



.Magazine of electricity, 207, 521, 565 



Matter, electric fluid excluded, 4 



Maximum density of electric fluid, 20 and 

 note i 



Measurements of apparatus, 219, 255, 273, 

 2 75, 466, 472 



Mechanism for Exp. I, 222 



Mercury, 366 



Metals, conducting power, 397, 398 



Method of the work, 2 



Method of trying charges, 241, note 17 



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 



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 



Nuremberg glass. 301, 376, 497 



Oblong, charge of, 284, 479; coatings, 320 

 Oil of vitriol, 626, 694 

 Overcharge, 6 



p- ratio of charge spread uniformly on disk 

 to that collected in circumference, 140; 

 estimated value by experiment 276 

 281, 289 



Penetration of electric fluid into glass 132 

 -169-174, 332, 339, 349, 355, 363 



Pennsylvania, Phil. Soc. of, 437 



Pith ball electrometer, 220, 240, 244, 358, 359 



Plate of air, 134, 340; concave, 155 /circular, 

 55-65, 140; thin, 73 



Plates, coated, lists of, 315, 324, 325, 370; 

 theory of, 129; separated circular, 74] 

 82, 141-144 



Points, discharge of electricity by, 123, note 9 



Positive electrification, 100, 101 ; defined to 

 be that of glass, 217; gives same pro- 

 portion of charges as negative, 364 



Potential, 199 (note) 



Priestley (Joseph, F.R.S., LL.D. Edin., b. 

 1733, d. 1804), 125, 126, 213, 354, 408, 

 60 1 



Prime conductor, 241, 295, 359, 539 



Prop, ix, 292, xvin, 269, xix, 140, xxn, 

 cor. 5, 140, xxiv, 144, 150, xxix, 282, 

 xxx, 289, xxxi, 285, xxxiv, 311, xxxv, 

 351, xxxvi, 365 



Pulleys, 295 



45 



Quad, nitre, 626, 696 



Rain water, 524 



Real charge, 313 



Real fluid, 91, 94 



Reciprocity of induction, 334 



Reduced charge, 270, 272 



Redundant fluid, i ^ 



Reel, 636, 644 



Repulsion, 106; of balls as square of re- 

 dundant fluid, 386, 525, 563 



Resistance, electric, varies as length of con- 

 ductor, 131; what power of velocity 

 574. 575, 629, 686; effect of heat on, 

 619, 620, 690 



Richard, his attendant, 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 of 

 salt water, 588; for measuring charge 

 of battery, 412, 441, 582 



Sal Amm., 626, 694 



Sal Sylvii, 626, 694 



Salt water, resistance of, 398, note 33 



Salted threads, 259; straws 394 zftc 



Sand, wet, 608 " 



Saturated solution s.s., 524, 617 



Saturation, electric, 6 



Scale of electrometer, 249, 560, 571 



Sea water, 524 



Sealing-wax, 219, 340, 511, 542 



Sensitiveness of electrometer increases with 



charge, 246 

 Shock, 207; increased by passing through 



copper wire, 639 ; by points and knobs 



compared, 572 

 Shock melter, 586, 622 

 Shock of torpedo, 397, 436; intensity, law 



of, 573. 607, 610, note 31 

 Silk strings, 241, 266, 295, 358, 447, 45 o, 472, 



Similar bodies, charge of, 66, 72 



Sliding coated plate, 488 



Slit coatings, 321 



Sound, before spark, 139 ; resistance tried by 



6 37. 645 

 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, force inside, 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 plate, 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 



