



Produced by Richard Tonsing, Odessa Paige Turner, TIA and
the Online Distributed Proofreading Team at
http://www.pgdp.net (This book was produced from scanned
images of public domain material from the Google Print
project.)






[Illustration: FRONTISPIECE.

"THE END OF THE WAR."

A GRAPHIC RECORD.

One minute before the hour.

All guns firing.

Nov. 11, 1918. 11 A.M.

One minute after the hour.

All guns silent.

    This is the last record by sound ranging of artillery activity
        on the American front near the River Moselle. It is the
        reproduction of a piece of recording tape as it issued
        from an American sound-ranging apparatus when the hour of
        11 o'clock on the morning of November 11, 1918, brought
        the general order to cease firing, and the great war came
        to an end. Six seconds of sound recording are shown. The
        broken character of the records on the left indicates great
        artillery activity; the lack of irregularities on the right
        indicates almost complete cessation of firing, two breaks
        in the second line probably being due to the exuberance
        of a doughboy firing his pistol twice close to one of the
        recording microphones on the front in celebration of the
        dawn of peace. The two minutes on either side of the exact
        armistice hour have been cut from the strip to emphasize
        the contrast. Sound ranging was an important means of
        locating the positions and calibers of enemy guns. A
        description of these wonderful devices, which were a secret
        with America and the Allies, is given