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" John F. O'Rourke, born in Tipperary in 1854, was the Irish engineer who built several of the tubes under the East and Hudson Rivers and six tunnels for New York subways." "He also invented the O'Rourke air lock for caissons." Out-of-print book: We Who Built America, page 390; copyright: 1939 by Prentice-Hall; author: Carl Witke.
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