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Telegraphy, by W.H. Preece and J. Sivewright. 3rd [Sic] Ed
William Henry Preece (Sir ),James Sivewright (Sir )
No preview available - 2015
action adjustment apparatus armature attached becomes Birmingham wire gauge cable causes cells circuit clerk conductor connection copper sulphate covered wire creosoted current flows current passing Daniell's battery dash deflection depressed direction disc disconnected distance distant station dots duplex earth-wire effect electricity electromagnet employed England fault fixed galvanized galvanometer gauge gutta percha hole inches indicated inserted insulator iron wire joint jointer latter leakage length Lenham lever line current line wire liquid magnet means metal miles Morse motion moved needle instrument number of words obtained ordinary paper piece pipes placed pointer pole porous portion position potential prefix purpose received recorder relay resistance coils reverse rheostat sal-ammoniac screw sending sent short circuit shown in fig signals soft iron soldered solution Sounder stay strength telegraph terminal terminal station test-box timber tion varies Wheatstone bridge words per minute zinc plate zinc sulphate