NOTES AND KEFEKENCES. 207 



PAGE 



145. FARADAY, On the Magnetism of Light (Phil. Trans. 1846, p. 1). 



145. WARTMANN, Rotation of the Plane of Polarisation of Heat by Magnet- 



ism (Journal de 1'Institute, No. 644). 

 PROYOSTAYE and DESSAINES, Ann. de Ch. et de Phys. October 1849. 



146. HUNT, Influence of Magnetism on Molecular Arrangement (Phil. Mag. 



1846, vol. xxviii. p. 1 ; Memoirs of the Geological Society, vol. i. 

 p. 433). 

 WARTMANN, Phil. Mag. 1847, vol. xxx. p. 263. 



147. GROVE, Experiment on Molecular Motion of a Magnetic Substance 



(Electrical Mag. 1845, vol. i. p. 601). 



147. On the direct Production of Heat by Magnetism (Proceedings of the 



Royal Society, 1849, p. 826). 



After this paper was communicated and ordered to be printed in the 

 Philosophical Transactions, I found that I had been anticipated by 

 Mr. YAN BREDA, who communicated, in 1845, a paper to the Insti- 

 tut on the subject : his paper appears hi the Comptes rendus under 

 an erroneous title, which accounts for its having been overlooked : 

 he does mot give thermometric measures of the heat he obtained, 

 nor did he produce heating effects by a permanent steel magnet, or 

 with other metals than iron. (Comptes rendus, October 27, 1845). 

 See also an earlier experiment by Mr. JOULE (Phil. Mag. 1843), to 

 which he called my attention after my paper was read. 



148, 151. The Experiments on the effects of Magnetism on the Matter 



magnetised, are collected by Mr. DE LA RIVE in his recently-pub- 

 lished Treatise on Electricity, vol. i. 



153. DAVY, Electricity 'defined as Chemical affinity acting on Masses (Phil. 



Trans. 1826, p. 389). 



VOLTA, Electricity excited by the mere Contact of conducting Sub- 

 stances (Phil. Trans. 1800, p. 403). 



164. GROVE, Gold-Leaf Experiment (Comptes rendus, Paris, 1839, p. 567). 



156. GROVE, Voltaic Action of Sulphur, Phosphorus, and Hydrocarbons 



(Phil. Trans. 1845, p. 351). 

 GROVE, New Voltaic Combination (Phil. Mag. vol. xiv. p. 388 ; vol. 



xv. p. 287). 



155. GROVE, Electricity of Blowpipe Flame (Proceedings of the Royal 

 Institution, February 1854), Phil. Mag. 



157. DALTON, New System of Chemistry, London, 1810. 



158. I have here and elsewhere used whole numbers, as sufficiently approxi- 



mate for the argument, but without intending to express any opin- 

 ion as to the law of PROUT. 

 158. FARADAY, Definite Electrolysis (PhiL Trans. 1834, p. 77). 



