[Illustration: _Above_--Machine-gun team of an American balloon company at work on the French front, trying to get an enemy airplane. These anti-aircraft guns are known as "Archies" _Below_--Men of the 313th U.S. Field Artillery cleaning and polishing 75-millimeter shells, to be sent over to the Hun at night. Dirty or rusted shells are dangerous to use. (_U.S. Official Photos_.)]…
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