Ralston Thresher

Ralston Thresher is a Pennsylvania historical marker in Washington County, dedicated 1947.

Washington County · dedicated 1947 · W Main St. (PA 844)

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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.

TodayHistorical map

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David Rumsey Map Collection, Stanford Libraries

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under a mile from where William Gabby lived in the 1760s

what this marker records spans 1777 to 1789, overlapping William Gabby's years here

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Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov

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