electrodynamics

Updated: June 19, 2025

That Morse's fellow-countryman, Joseph Henry, chiefly prepared the way for that triumph, the following account, with just emphasis, demonstrates. Ampère was the first and is the most famous investigator in electrodynamics. He also invented a telegraphic arrangement in which he used the magnetic needle and coil and the galvanic battery.

- The Great Events by Famous Historians, Volume 17