GROVE'S AND BUNSEN'S ELEMENTS. 



661 



variety of carbon. The two bodies which thus form 

 the opposite poles are immersed in each of these ele- 



FIG. 339 C, D, E (C real size; D an. proj., real size ; E | real size}. 



ments in two different liquids, which must be in con- 

 ducting communication, but are not allowed to mix 



