On May 24, 1844, Samuel F. B. Morse dispatched the first telegraphic message over an experimental line from Washington, D.C., to Baltimore.
– from the Library of Congress http://memory.loc.gov/ammem/today/may24.html
Electromagnetism is a term which describes the interaction between electric currents and magnetic fields. This interaction was first noted in 1820 by the Danish physicist [...]
