Ralston Thresher
Nearby was the site of the Robert McClure factory of pre-Civil War days. It pioneered in making Andrew Ralston's machine cleaning and threshing grain in a single operation, patented in 1842.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov
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