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Janesville,city (1990 pop. 52,133), seat of Rock co., S central Wis., on the Rock River; inc. 1853. It is an industrial and commercial center in a grain, dairy farm, and tobacco area. Manufactures include agricultural and transportation equipment, machinery, metal and plastic products, and feeds. A state school for the blind is located in Janesville. Points of interest include the 26-room Tallman House, where Lincoln spent a weekend in 1859; the Stone House (1842), of Greek Revival style; and the Milton House (1844), which is connected to a log cabin by a tunnel used by runaway slaves as a stop on the Underground RailroadUnderground Railroad,
in U.S. history, loosely organized system for helping fugitive slaves escape to Canada or to areas of safety in free states. It was run by local groups of Northern abolitionists, both white and free blacks.
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