CATALOGUE. ELECTRICITY. 



419 



Barletti on the laws of charged glass. Soc. 



Ital. IV. 304. VII. 444. 

 Nicholson. Ph.tr. 1789. 285. ' 



Observes, that some uncompensated electricity is neces- 

 sary to a charge : that the intensity of the charge, and the 

 explosive distance with a given quantity of electricity, js 

 directly as the thickness of the substance ; he found that 

 a piece of Muscovy talc, ^^ inch thick, received ten times 

 as much electricity as an equal surface of common glass. 

 Hence a solid inch of such matter must contain at least as 

 much electricity as would charge a conductor 7 inches in 

 diameter, and 135 feet long, so as to give a spark of nine 

 inches ; and the bulk of a man more than 5000 times as 

 much. 

 Wilkimon on the Leyden phial. 8. Lond. 



1798. 



A double plate of glass takes a higher charge than a sin- 

 gle piece of the same thickness. 



Electric Attractions and Repulsions. 



Gray. Ph. tr. 173^. XXXVIl. 397. 



Finds that the attraction operates in and through a 

 vacuum. 



Dufay on electric attraction and repulsion. 



A. P. 1733.475. 1734. 341. 

 Wheler's experiments on electrical repulsion. 



Ph.tr. 1739. XLI. 98. 

 Mortimer on \V heler's experiments. Ph. tr. 



1739. XLI. 112. 

 Desaguliers. Ph. tr. 1742. XLII. 140. 



Thinks the attraction between air and water may be 

 electrical, causing the rise of vapour. 



Symmer on electrical cohesion. Ph.tr. 1759. 



340. 

 Lichtenberg's figures delineated on electrics 



by the attraction of dust. N. C. Gott. 



1777. Vlir. IG8. Commentat. Gott. 1778. 



I. M. 65. Dcluc Idces. xii. Troostwyck 



en Krayenhoffs verhandllng. 8. Germ. 



Leipz.Samml. xlvi. Goth. Mag. I. iii. 76. 



V. iv. 176. Cavallo. Ph. tr. 1780. 13. 

 Sanmartini on the effect of electricity on 



hydrometers. Soc. Ital. VI. 120. 



When the fluid was electrified the hydrometers some- 

 times rose a few degrees. 



Carmoy on the motion of electrified fluids in 

 capillary tubes. Journ. Phys. XLV. (II.) 

 lot). 

 Thinks the mere presence of electricity has no general 

 effect on this motion. 



Miller on electric attraction and repulsion. 



Ir.tr. VII. l.'39.Nich. IV.461. 

 Giib. IV. 419. V.73. 



Aldini attributes regular forms, like those of snow, to 

 Lichtenberg's figures. Von Arnim denies their regularity. 



On the phenomena of powder thrown on 

 glass. Journ. Phys. LW. 237. 



Von Arnim on terrestrial electricitj'j as tend- 

 inf» to the discovery of springs. Gilb. 

 Xm. 4()7. 



Ritter on an electric polarity. Gilb. XV. 

 106. 



Conducting Powers. 



Plot's catalogue of electrics. Ph. tr. XX. 



1698. 384. 

 Gray on the electricity of water. Ph. tr. 



1732. XXXVIL 227. 

 Dufay. A. P. 1733. 73, 233. 

 Desaguliers. Ph. tr. 1741. XLI. 661. 

 Watson. Ph.tr. 1746. XLIV. 41. 



Found ice a conductor. 



Watson on insulation. Ph. tr. 1747. XLIV. 



388. 

 Watson on electricity in a vacuum. Ph. tr. 



1751. 362. 

 Bosc on healed glass. Ph. tr. 1749. XLVI. 



189- 

 Lemonnicr on the electricity of the air. A. 



P. 1752. 233. II. 8. 

 Dutour on the action of flame upon electrical 



bodies. S. E. II. 246. 



