NPL has developed Hydroelectric Cell, which is form of galvanic cell. In other works he examined the reactions occurring in the galvanic cell and in galvanoplastics. In this way, contact electrification leads to the invention of the Galvanic cell or battery. In written representation of galvanic cell, "anode" is written on the "left". By the 1810s, William Hyde Wollaston made improvements to the galvanic cell. The galvanic cell potential results from a "pair" of electrodes. In a galvanic cell, the anode is the electrode at which the oxidation reaction occurs. In 1813 he constructed a large galvanic cell and conducted experiments using them. The basic setup in electrosynthesis is a galvanic cell, a potentiostat and two electrodes.