Spike Cannon, To

Is to drive into the vent a jagged and hardened steel spike with a soft point, or a nail without a head; break it off flush with the outer surface and clinch the point inside by means of a rammer. A gun may be unspiked if the spike is not screwed in or clinched, and the bore is not impeded, by putting in a charge of powder one-third of the weight of the shot, and ramming junk-wads over it; laying on the bottom of the bore a slip of wood, with a groove on the under side containing a strand of quick-match, by which fire is communicated to the charge. In a bra gun, take out some of the metal at the upper orifice of the vent, and pour sulphuric acid into the groove, and let it stand some hours before firing. If this method, several times repeated, is not succe ful, unscrew the vent-piece if it be a bra gun; and if an iron one, drill out the spike, or drill a new vent. Artillery can be rendered unserviceable by other methods besides spiking, as follows: (1) Wedge a shot in the bottom of the bore by wrapping it with felt, or by means of iron wedges, using the rammer or a bar of iron to drive them in. (2) Cause shells to burst in the bore of bronze guns. (3) Fire broken shot from them with large charges. (4) Fill the piece with sand over the charge, to burst it. (5) Fire a piece against another, muzzle to muzzle, or the muzzle of one to the chase of the other. (6) Light a fire under the chase of a bronze gun, and strike on it with a sledge, to bend it. (7) Break off the trunnions of iron guns; or burst them by firing them at a high elevation, with heavy charges and full of shot. To drive out a shot wedged in the bore: unscrew the vent-piece if there be one, and drive in wedges so as to start the shot forward; then ram it back again in order to seize the wedge with a hook; or pour in powder, and fire it after replacing the vent-piece. In the last resort, bore a hole in the bottom of the breech, drive out the shot, and stop the hole with a screw. When a shot is jammed in a gun and cannot be rammed home to the cartridge, destroy the charge by pouring water down the vent and muzzle until the ingredients are di olved, and cleared out of the bore; then introduce a small quantity of powder through the vent and blow out the shot.