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Bridgeport's early years were marked by residents' reliance on fishing and farming. The city's location on the deep Newfield Harbor fostered a boom in shipbuilding and whaling in the mid-19th century, especially after the opening of a railroad to the city in 1840. The city rapidly industrialized in the late-19th century, when it became a manufacturing center. It produced such goods as the famous Bridgeport milling machine, brass fittings, carriages, sewing machines, brassieres, saddles, and ammunition. Bridgeport annexed the village of Black Rock and its busy harbor in 1870.