These are made entirely of iron; the engraving (Fig. 222) explains itself. S is the acid feeder attached to generator, and Z the salt solution feeder attached on top of the fountain.

Fig. 222.   German Acid and Salt Solution Feeder attached to Apparatus

Fig. 222. - German Acid and Salt Solution Feeder attached to Apparatus.

Fig. 223 is an adjustable salt solution feeder, as frequently used in conjunction with German apparatus.

Fig. 223.   Adjustable Salt Solution Feeder

Fig. 223. - Adjustable Salt Solution Feeder.