In the liquid discharge recording head provided with a stopper member consisting of an elastic member to be penetrated by a hollow needle member for liquid supply into a liquid preserving chamber in the recording head, the invention enables smooth insertion of the front end of the needle member into the stopper member without insertion failure. Light radiated from the specimen is imaged on a detection device. Embodiments of the invention provide methods for selecting a unique visual for each title in the list, even when the articles do not contain any illustrating visuals and even when illustrating visuals are duplicated among several different articles. Additionally, the non-volatile memory can include a voltage supply line regulator that limits voltage supply based on a sensed operational current that results from the controlled current source in the non-volatile memory. The light management device is operable to manage a plurality of light beams for exchange between a plurality of sets of optical fibers.