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Caption: "Firing 14 Inch Disappearing Gun." This is a copy of a photograph taken by C.D. Heath at the Sandy Hook Proving Ground. It shows a heavy artillery gun firing from an embankment upon which several people stand. Located at Sandy Hook, New Jersey, the Sandy Hook Proving Ground was used by the U.S. Army to test ordinance and materiel from 1874-1919. See also 96-07-08-alb05-102.
Date: 1910