English: In this Lockwood cell the zinc plate is made like a kind of wheel with spokes, so as to expose a large surface to the liquid, and is supported by three lugs resting on the edge of the glass vessel. The copper plate is made of thick copper wire, bent into the form of a double spiral, with the crystals of copper sulphate placed between the spirals, the upper spiral being found to retard the travelling up of the copper sulphate solution to the zinc plate if the cell be kept sending even only a weak current. For the lower spiral, a copper disc, similar to that used with the Minotto's cell may be substituted, and for the upper one, a perforated copper disc, without interfering with the action of the Lockwood cell.