A method of performing an electrochemical reaction in an electrochemical cell comprising electrodes separated by a hydrophilic ion-exchange membrane, comprises conducting the reaction in the presence of an aqueous solution of an electrolyte of which the concentration is controlled. In some embodiments, the present dispenser includes a housing for retaining a plurality of stacked, individual stamp-like pharmaceutical dosages. The vehicular lamp includes a light guide that includes a side end surface to which light emitted from the light source is incident on one side thereof; a light-emitting surface that emits the light that is incident from the side end surface in a predetermined direction; and a reflective back surface that has a reflecting portion that faces the light-emitting surface. where the starting transformer comprises a bobbin having a core-less structure and a primary coil and a secondary coil wound around the bobbin. This provides better control of the pressure pulse generated which in turn gives a more predictable trajectory for the ejected drop . A menu screen generating unit generates image data for a menu screen 50, which includes a function icon array 70 formed by multiple function icons 52-62 aligned horizontally, and a folder icon array 72 formed by multiple folder icons 120 aligned vertically.