CATALOGUE. — ELECTRIC ITT. 



425 



Gray on the revolutions of pendulous bodies. 

 Ph. tr. 1736. XXXIX. 280. . 



■^-Gray's last experiment on revolutions, re- 

 lated by Mortiiner.Ph.tr. 1730. XXXIX. 

 400. 

 Gray fancied the motions were naturally directed from 



west to east. 



Wheler on Gray's experiments of revolu- 

 tions. Ph.tr. 1739. XLI. 118. 



According to Lichtenberg, some similar observations have 

 keen made by Miiller, Delaperriere, Hartmann, and 

 Schaffer. 



Henley. Ph. tr. 1774. SSQ. ii. 



Flame is driren by a weak charge towards a negative ball. 



A tube of glass, surrounding a point, prevents the current 

 ef air, and the escape of the fluid. Robison. 



Excitation, or Destruction of the 

 stable Electric Equilibrium. 



Richmann on excitation. C. Petr. XIV. 



299. 

 Bergmann on the excitation of glass plates, 



and of ribbons. Opusc. V. 370, 391. 

 Aubert on electric permutations. Roz. 



XXXIX. 194. 

 On excitation. Nich. II. 43. 

 Vassalli on excitation. Gilb. VII. 498. 

 Haiiy on the excitation of metals. B. Soc. 



Phil. n. 85. Gilb. XVII. 441. 



Beonet found that no electricity was excited by flame, 

 by the explosion of gunpowder, nor by the expansion of 

 condensed air. 



Excitation by simple Contact. 

 Perhaps Webers Erfahrungen idioelectrische 



kijrper ohne reiben zu electrisiren. 1781. 

 Bennet's experiments on excitation. Ph. tr. 



1787. 26. 

 Bennet's new experiments on electricity. 



1739. Nich. 8. 1. 144, 184.Gilb. XVII.428. 

 Cavailo's electricity. 



VOL. II. 



Volta's papers on galvanic electricity. See 

 Galvanism. 



Excitation by Friction. 



See Electrical Machines. 

 Hauksbee's experiments on attrition in a va- 

 cuum. Ph. tr. 170j. XXIV. 2165. 



Amber rubbing a woollen cloth produced light and heat : 

 flint and steel only a faint lambent light. Glass rubbed 

 with woollen cloth became electric in'a vacuum. Glass 

 rubbed with glass shone both in the open air and in a va- 

 cuum, as well as under water. 



Gray's experiments on worsteds of dif- 

 ferent colours. Ph. tr. 1735. XXXIX. 

 166. 



Ludolffon the electricity of barometers. A. 

 Berl. 1745. 1. 



Cooke on the electricity of new flannel. Ph. 

 tr. 1747. XLIV. 457. 



Symmer. Ph. tr. 1759- 308. Dutour from 

 Symmer. A. P. 1767. H. 34. 



Beccaria dell' elettrismo. 4. 1753. Ph. tr, 

 1766. 105. 



Cigna. Misc.Taur. III. 



Bergmann. Schw. Abh. XXV. 344. Ph. tr. 

 1764. 84. 



Finds that a body becomes more disposed to negative 

 electricity as it becomes more heated. 



Aepinus on the electricity of barometers. N. 



C. Petr. XV. 303. 

 On a cat that gave smart sparks. A. P. 1771. 



H. 37. 

 Henley. Ph. tr. 1774. 389- v. 

 *Henley. Ph. tr. 1777. 122. 

 Socins anfangsgriinde der electricitat. Ha- 



nau, 1778. 66. 

 Herbert on the excitation of metals. Theoria 



phaenom. electr. Vienna, 1778. 15. 

 On metals as electrics. Heuimer in Rozier. 



XVI. 50, 74. 



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