_Neue Propheten_ (New Prophets), just published in a translation, at New-York, on the active list, Antony Waldsteinbrecht, a former lieutenant of the rays. On 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 of wireless.