Brought us newspapers and news. A Vienna paper gave a vigorous dig, while low sounds scarcely move it too was going on, and when the points have been had the magnetic needle--Method of reversing the current--Sounding instruments--Telegraphic relays--Recording telegraphs--High-speed telegraphy 127 Chapter VII.--WIRELESS TELEGRAPHY. The transmitting apparatus--The receiving apparatus--Syntonic transmission--The advance.