Hausse, Pendulum

Is a scale of sheet-bra , the graduations of which are the sines of each quarter of a degree to a radius equal to the distance between the muzzle-sight of the piece, and the axis of vibration of the hau e, which is one inch in rear of the base-ring. At the lower end of the scale is a bra bulb filled with lead. The slider which marks the divisions on the scale is of thin bra , and is clamped at any desired division on the scale by means of a screw. The scale pa es through a slit in a piece of steel, with which it is connected by a screw, forming a pivot on which the scale can vibrate laterally. This piece of steel terminates in pivots, by means of which the pendulum is supported on the seat attached to the gun, and is at liberty to vibrate in the direction of the axis of the piece. The seat is of metal, and is fastened to the base of the breech by screws, so that the centres of the steel pivots of vibration shall be at a distance from the axis of the piece equal to the radius of the base-ring.