KRUPP'S BREECH-LOADING CAST-STEEL GUN. CHASSEPOT RIFLE. a, a, India-rubber ring; C, needle guide; b, G. washers. BREECH-LOADER. a, lever; b, notch; c, central pivot; d, slide. REMINGTON RIFLE. B, breech-block; C, c, bolts; D, lever; d, pin; e, spring; G, hammer. WARD-BURTON BREECH-LOADING RIFLE. C, b, cover slide; D, recoil: d, ejector; e, turning stud; F, f, breech pin and handle; G, hammer and firing pin; g1, cocking-shoulder; O,trigger. TRANTER REVOLVER. a, the chamber; b, hammer; c, trigger; d, spur for raising the hammer; e, lever-ramrod. GERMAN ARMOR OF THE TWELFTH CENTURY. PRUSSIAN NEEDLE-GUN. A, needle-bolt; B, B, is the lock for drawing the needle-bolt back, C, C, is the chamber, also tubular, in which is fixed the needle-guide d; c, knob; f, inclined edge; D, trigger; g, spring; h, catch. THE GATLING BATTERY-GUN. A, hopper; B. plug for removing locks; C, knob for controlling the snapping of gun. THE AMERICAN MITRAILLEUSE.