Introduction -- Part I. Illuminations : the light of reason. Interpretations -- Electricity and enlightenment -- Part II. Shocking inventions : instruments. Robert Boyle and the air-pump -- Francis Hauksbee and the electrical machine -- Stephen Gray and the charity boy -- Pieter van Musschenbroek and the Leyden jar -- Part III. Lightning cures : applications. Benjamin Franklin -- Knobs or points? -- The business of medicine -- Therapeutic shocks -- Part IV. Sparks of imagination : theories. Problems -- Fluids and atmospheres -- Theological aethers -- Measurement and mathematics -- Part V. The flow of life : current electricity. Henry Cavendish and the torpedo -- Luigi Galvani and his frogs -- Alessandro Volta and his pile -- Resuscitation.