who became a professor at Göttingen. In 1833 he and Karl Gauss built an electric telegraph between their laboratories. In 1843 Weber moved to Leipzig, where his main work was to develop a system of self-consistent electrical units (as Gauss had already done for magnetism). Both systems were adopted in 1881. The SI unit of magnetic flux is named after him. He was one of the first people to suggest that an electric current is a flow of electrically charged particles of matter.