Hot Shot

Shot made red-hot for the purpose of setting fire to buildings, shipping, etc. The charges for hot shot are from one-fourth to one-sixth the weight of the shot. With small velocities, the shot splits and splinters the wood, so as to render it favorable for burning. With great velocity the ball sinks into the wood, is deprived of air by the closing of the hole, and chars instead of burning the surrounding wood. It should not penetrate deeper than 10 or 12 inches. Red-hot balls do not set fire to the wood until some time after their penetration. They retain sufficient heat to ignite wood after having made several ricochets upon water. The wads for hot shot should be made of clay or hay, the latter to be well soaked in water, and before being used, the water pre ed out of it. With proper precautions in loading, the ball may be permitted to cool in the gun without igniting the charge. The piece, however, should be fired with as little delay as po ible, as the vapor would diminish the strength of the powder. They are heated by means of furnaces erected for the purpose, which hold sixty or more shot. The shot being placed, and the furnace cold, it requires one hour and fifteen minutes to heat them to a red heat; but after the furnace is once heated, a 24-pounder shot is brought to a red heat in twenty-five minutes. Red-hot shot is not in general use.