This mixture is ignited by an automatic, electric sparking device, and the explosion of the gases drives the piston _P_ to the right. 伯莎M.克拉克.科学通论.
Cuneus, a pupil of Muschenbroeck, was one day trying to charge some water in a glass bottle with electricity by connecting it with a chain to the sparking knob of an electrical machine. 威廉·亨利·杜利特.世纪发明.