Date: | 1939 |
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Description: | International PA-100 power unit operating a Pomona water pump in a lead and zinc mine. A box labeled "dynamite" is in the foreground. |
Date: | 1867 |
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Description: | This 1867 manuscript map by Increase Lapham shows the topography and geology of the Blue Mounds region in the Town of Brigham in Iowa County and the towns ... |
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