Capable of hurling a 260-pound missile 18, miles, an eight-inch railway gun recently delivered to the United States Army is the first made by American industry since 1918. The 225,000-pound mobile cannon, the car for which was built at the Baldwin Locomotive Works plant at Eddystone, Pxr, was taken on a 250 mile railroad touring test before going to the Aber- deen proving grounds in Maryland where it received a series of trials.