首页 / 官方藏书 / The American Electro Magnetic Telegraph / With the Reports of Congress, and a Description of All Telegraphs Known, Employing Electricity or Galvanism / [27] The Electro Magnetic Telegraph, of Counsellor Gauss and Professor William Weber, invented at Göttingen, 1833.

[27] The Electro Magnetic Telegraph, of Counsellor Gauss and Professor William Weber, invented at Göttingen, 1833.

The American Electro Magnetic Telegraph / With the Reports of Congress, and a Description of All Telegraphs Known, Employing Electricity or Galvanism · Alfred Vail · 第 12 / 16 章