大雷雨的时候所产生的高压静电,解释已经有好多种,最近的研究,认为这种电的产生,可能是由於雷雨中不洁的水变成冰雹的时候的凝结作用所致的,例如,实验证明,当氢氧化铵(NH_4OH)稀溶液凝结的时候在冰与所余的液体间,即发生一个高速235伏特的电单位差。在冶炼铣鐵中用得最多的原料是“空氣”平均每一噸煉成的铣鐵;需要用四噸半的空氣。 There are many explanations for high-voltage static electricity generated during thunderstorms. Recent studies have suggested that this electricity generation may be caused by the condensation of dirty water in a thunderstorm when it becomes hail, for example, Experiments have shown that when the dilute solution of ammonium hydroxide (NH4OH) condenses between the ice and the rest of the liquid, a high-speed 235-volt electrical unit difference occurs. The most used raw material in smelting and milling is “milling” of iron per ton for “air”; four tons of air is needed.