A LIST OF SOURCES 



DUFAY, CISTERNAY. See vol. ii., p. 267. 



Histoire de V Academic Roy ale des Sciences, between 

 1733 and 1737, contains Dufay's principal papers. 



EULER, LEONARD (1707-1783). See vol. iii., p. 17. 



Lettres a une Princesse d'Allemagne sur quelques sujets 

 de physique et de philosophic, St. Petersburg, 1768. 



FARADAY, MICHAEL. See vol. iii., p. 241. 



On the Induction of Electric Currents, in Phil. Trans. 

 of Royal Society for 1832, pp. 126-128. Explication 

 of Arago's Magnetic Phenomena, by Michael Faraday, 

 F.R.S., Phil. Trans, of Royal Society for 1832, pp. 146- 

 149. 

 FRANKLIN, BENJAMIN. See vol. ii., p. 286. 



New Experiments and Observations on Electricity, 

 London, 1760. 



GALVANI, LUIGI (1737-1798). See vol. iii., p. 229. 



De viribus electricitatis in motu muscular i commentatio, 

 Bologna, 1791. This discovery of Galvani was first 

 brought to notice by Volta's famous paper to the Royal 

 Society, entitled "An Account of some Discoveries 

 made by Mr. Galvani, of Bologna," published in the 

 Phil. Trans, for 1793, pp. 10-44. 



GAY-LUSSAC, JOSEPH Louis. See vol. iv., p. 41. 



Memoire sur la combinaison des substances gazettses, 

 Mem. Soc. d'Arcueil, 1809. 



HALLEY, EDMUND. See vol. iii., p. 7. 



An Account of Several Extraordinary Meteors or Lights 

 in the Sky, in Phil. Trans., vol. xxix., pp. 159 - 162, 

 London, 1714. 

 HELMHOLTZ, H. L. F. See vol. iii., p. 280. 



Handbuch der physiologische Optik, Leipzig, 1867. 



JOULE, J. P. See vol. iii., p. 269. 



On the Calorific Effects of Magneto-Electricity and the 

 Mechanical Value of Heat, in Report of the British Asso- 

 ciation for the Advancement of Science, 1843, v l- x "- 

 P- 33- 



255 



