■466 SUPPLEMENTARY NOTES. 



establishments of France. The electro-chemical apparatus for this 

 purpose, consists simply of iron, a concentrated solution of sea salt, 

 and the ore of the metal properly prepared. Thus that mighty 

 agent, which nature has hitherto exclusively employed in her 

 extensive laboratory, is beginning to be the obedient servant of 

 man; and it requires not the tongue of a prophet to foretel that the 

 voltaic pile will hereafter create as great a revolution in our che- 

 mical manufactories, as the steam-engine has already effected m 

 the mechanical arts." 



