45 



Index to Cavendish Manuscripts 



Dividing machine, 341, 459, 517, 591 

 Divisions of trial plate, 297 

 Double plates, 333 



Earth connexion, 258, 271 

 Electricity an elastic fluid, 4, 195; limit to 

 density, 20; diffused through bodies not 

 electrified, 216; inches of, 647, 648 

 Electrification, degree of, 102, 201 and note 7 

 Electrodes, larpe, 258, 271 

 Electrometer : 



Cavendish's discharging, 402, 405, 427, 

 43. 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, 



59 

 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 esti- 

 mation of capacity, 250, 261; in Exp. I, 

 234; due to unequal charging, 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. alk., 627, 694 



Floor, effect of, 335 



Florence flask, 521; battery, 521 



Fluid, electric, 195, 216, note i ; real, 91 ; 

 incompressible, 69, 94, 236, 273. 276, 

 278, 294, 348 and note 3 



Force, near an electrified surface, 154; in- 

 versely as square of distance, 232, 512, 

 ' 5J3. 5 2 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 



Garden, copper wire stretched round ,643 



Gauge electrometer, 224, 248 



General conclusions, 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, 450, 654, 681, 

 687, note 35 



Globe, electrified, 20-27, 2 8; capacity of, 

 281, 282; compared with double plate, 



333, 334 



Globe, charge of the terrestrial, 214 

 Globe of electrical machine, 248, 495, 563, 



568, 569 



Globe charged 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 



Hamilton, Dr, Prof, of Philosophy, Dublin 



(Priestley, p. 429), 126 

 Heat, effect on charge of glass, &c., 366, 368, 



548, 549, 556, 680, note 26 

 Heat produced by current, 212 

 Height and size of room, 335 

 Hemispheres, hollow, 219 

 Henly (William, F.K.S., d. 1779, linen 



draper in London), his electrometer, 



559, 5"8, 569, 580 

 Hissing noise before spark, 213 

 Hot glass a conductor, 369, note 26; com- 

 pared 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, electric, 3, 202 



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 induction, 



339, 5 2 an d note 24 

 Induction, 44-47, 175-194, 202 sq., 275, 277, 



287, 288, 334, 335; calculation of, 338. 



See Specific 

 Instantaneous spreading of electricity, 307, 



310-323, 326 

 Insulation, 100 

 Iron, conductivity of, 398, 576, 687, note 32 



Jar, 223; capacity of jars, 573, 581 



Kinnerslev (Ebenezer, Physician in Phila- 

 delphia, b. 1712), 126, 136, 213; see 

 new experiments of electricity, Phil. 

 Trans., 1763, 1773 



Knob for discharging, 511, 572 



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, 544, 559, 



569, 57. 571, 58 



Law of electric force from Exp. I, 291, 



note 19 



Leakage, electric, 260, 264, 393 

 Leather torpedo, 608 

 Leyden vial, 128, 206, 313, 363, 389 

 Light, Newton's fits, 354 



