ON ELECTRICITY IN EQUILIBRIUM. 515 



Electr. Ulm, 1823. Leschan, Grundziige der Reinen Elektr. 1826. Farrar, Ele- 

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 1829. Murphy's (Mathematical) Principles of Electr. 1833. Becquerel, Traite 

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Memoirs. Hauksbee's Physico-Mech. Experiments, 4to, 1709, and Ph. Tr. 1706, 

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 p. 328. Gray's Exp. ibid. 1720, p. 104; 1731, p. 18; 1732, p. 397. Dufay's, 

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ibid. 1745 1766 (various memoirs). Watson, Ph. Tr. 1745, p. 481 ; 1747, 



pp. 388, 695, 704 ; 1751, pp. 202, 362. Hollmann, ibid. 1745, p. 239. Lemonnier, 

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 Knockerhauer, Ueber die Gebundene Elektr. Pogg. Ann. xlvii. 444, Iviii. 211, 391. 



Conducting Powers. Plot's Catalogue of Electrics, Ph. Tr. 1698, p. 384. 

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 Watson, ibid. 1746, p. 41. Mazeas, ibid. 1753, p. 377. Ammersin, De Electr. 

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 Cavendish, ibid. 1776. Achard, Jour, de Phy. xv. 117, xxii. 245. Bergman on the 

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 ..f'f. Republished, 2 vols. 1839, 1844. 



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