Thick, and thin rolled silver cathodes, were suspended in a %, slightly acid, solution of silver nitrate contained in tarred wooden tanks.
Six anodes were suspended, alternately with four cathodes, in a saturated solution of copper sulphate in a cylindrical fire-clay trough, all the anodes being connected in one parallel group, and all the cathodes in another.
A hundred or more jars were coupled in series, the cathodes of one to the anodes of the next, and were so arranged that with the aid of side-pipes with leaden connexions and india-rubber joints the electrolyte could, once daily, be made to circulate through them all from the top of one jar to the bottom of the next.
The cathodes, when thick enough, were either cast and rolled or sent into the market direct.
The cathodes are frequently of electro-deposited copper, deposited to a thickness of about 3 1 in.