NEU'I R.U.fZ.rriON OF TELIlCRAril CROSSFIRE A2\ 



Telegraph Line Current -Transmitting End 



Telegraph Current in Receiving Relay 



Sending End Crossfire., Wire 1 to Wire 2 



Sending End Crossfire, Wire 1 to Wire 3 



Receiving End Crossfire, Wire 1 to Wire 2 



Receiving End Crossfire, Wire I to Wire 3 



F"ig. 2 — Telegraph operating and crossfire currents. 13 B.&S. Ga. loaded cable 



Quad. 90 miles in length 



Note 1 : Oscillograms of crossfire current taken with vibrator in series with receiving 



relay 



Note 2: Wave "A," 150 milliamperes per inch; other wa\cs 20 milliampercs per inch 



