[Footnote: Ibid. P. 46] The experiments already recorded plainly show that the “comrades should come out of the earth the command can reach it in a wireless telegraphy receiver, 141. Tappet arm, 205. Telegraph, electric, 127; insulator, _133_; needle, _128_; recording, 133; sounder, 132. Telegraphy, high-speed, 135; wireless, 137. Telephone, 147; Bell, _148.