That a proper quantity of this powder rammed into a hollow tube of brass or iron, according to its bigness, would drive a ball of iron or lead, with such violence and speed, as nothing was able to sustain its force.

将适量的这种粉末按其大小撞入中空的黄铜或铁管中，将以如此猛烈的速度推动铁球或铅球，其力量无法承受。