The invention relates to the soybean variety designated A1037391. A toner concentration controller is adapted to receive a signal from the optical sensor and to generate an Add Toner signal to replenish toner material in the sump. A cathode of the first diode is connected to one of the first word lines. The slender glass tube is welded to the glass tube so that the small-diameter part is placed in the sealed portion and the large-diameter part is placed further away from the glass tube than the smaller-diameter part.