CHAP.X. §.I. ELECTBIC FOEOB, &C. 109 



The fact long since obtained by Matteucoi, viz. 

 that of causing the muscles of a galvanoscopic frog 

 to contract by placing its nerve upon the muscles of 

 another animal during their contraction, is well 

 known; and in a communication* to the Eoyal 

 Society, Matteucoi has adduced strong reasons for 

 believing that an electric disequilibrium is produced 

 during muscular contraction. 



Do Bois Eeymond" has also satisfactorily shewn, 

 that when the hands are placed in two separate 

 vessels containing water, and connected with a galva- 

 nometer, that then, upon making the muscles of one 

 arm contract, an effect is produced upon the needle. 

 These results have been confirmed by Zantedeschi ^. 

 EnFF", and Tyndall^ 



The results obtained by Despbetz^, Becquebel'', 

 and Matteucci', have thrown strong doubts upon 

 the conclusions deduced by Do Bois Eeymond. 

 Several experiments undertaken by myself, both 

 prior and subsequent to the knowledge of Du Bois 

 Eeymond's researches, tended to confirm in my 



the Biblioth^que UniverseUe de G-enfeve, in the AnnaleS de 

 Chimie et de Physique, and in tlie Comptes Bendas for the 

 year 1856. 



■> Philosophical Transactions, 1850. Ninth Serfes. 



"= Comptes Eendus, vol. xxviii. p. 641 . 



* Biblioth^que UniverseUe de Genfeve, Fev. 1850. 



« Ibid. 



' British and Foreign Medical Review for Jan. 1864, p. 141 . 



t Comptes Eendus, vol. xxviii. p. 653. 



" Ibid. p. 663. 



i Ibid. p. 783. 



