Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Before going further we will de fine a few of the terms we shall use. The two poles or conducting sur faces immersed in the liquid of a plating bath are called the anode and the kathode. The anode is the pole at which the current enters the bath and the [cathode that at which it -leaves. The liquid is called the electrolyte, and the operation in cluded under the general head of electrolysis.