Letter from James Wimshurst to Contrad W. Cooke presenting the original Wimshurst influence machine, 1882 Letter from James Wimshurst to Contrad W. Cooke 1882
Electrotherapeutic Wimshurst machine, ebonite plates, brass conductors, glass tubes, with accessories, mounted on wooden table, James Wimshurst, inventor, English, 1890-1920 Electrotherapeutic Wimshurst machine
Twelve-plate (30-inch diameter) Wimshurst machine in glass case, constructed by James Wimshurst himself and demonstrated at his public lecture at the Royal Institution in 1888. This was the largest multiple-plate machine he built, and produced sparks almost 14 inches long. See note. Twelve-plate (30-inch diameter) Wimshurst machine in glass case 1888