462 NOTES AND REFERENCES. 



PAGE 



VOLTA, Electricity excited by the mre Contact of Conducting 

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



139. GROVE, Gold-Leaf Experiment, Exp. Investns., p. 232. 



GROVE, Voltaic Action of Sulphur, Phosphorus, and Hydro- 

 carbons, Exp. Investns., p. 285. 



140. GROVE, New Voltaic Combination, Exp. Investns., p. 231. 

 GROVE, Electricity of Blowpipe Flame, Exp. Investns., p. 392. 



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



142. I have here and elsewhere used whole numbers, as sufficiently 



approximate for the argument, but without intending to 

 express any opinion as to the so-called law of PROUT. 



FARADAY, Definite Electrolysis (Phil. Trans. 1834, p. 77). 

 144. WOOD, Heat Disengaged in Chemical Combinations (Phil. Mag. 



i8 S2 ). 



146. ANDREWS, Phil. Trans. 1844, p. 21. 



HESS, Poggendorff's Annalen, Bd. Hi. p. 107. 



147. FAVRE, Ann. de Ch. et de Phys., vols. xxxix. xl. ; Comptes 



rendus, Paris, vol. xlv. p. 56, and vol. xlvi. p. 337. 



153. CATALYSIS by Platinum (DOBEREIMER, Ann. de Ch. etde Phys., 

 torn. xxiv. p. 93 ; DULONG and THENARD, Ann. de Ch. et de 

 Phys., torn, xxiii. p. 440). 



GROVE, Gas Voltaic Battery, Exp. Investns., pp. 249, 253. 



155. MOSOTTI, Forces which Regulate the Internal Constitution of 



Bodies (Taylor's Scientific Memoirs, vol. i. p. 448). 



PLUCKER, Repulsion of the Optic Axes of Crystals by the 

 Poles of a Magnet (Taylor's Scientific Memoirs, vol. v. 

 P- 353)- 



Magnetic Action of Cyanite (Lit. Gaz. 1849, p. 431). 



156. MATTEUCCI, Correlation of Electric Current and Nervous 



Force (Phil. Trans. 1850, p. 287). 



157. CARPENTER, On the Mutual Relations of the Vital and Physical 



Forces (Phil. Trans. 1850, p. 751). 



158. On Effort. See BROWN, Cause and Effect ; HERSCHEL'S Dis- 



course ; and Quarterly Review, June 1841. 



HELMHOLTZ, M tiller's Archives, 1845 \ MATTEUCCI, Comptes 

 rendus, Paris, 1856 ; BECLARD, Archives de Medecine, 1861. 



