Plans of the Bethlehem oil mill with the hemp stampers outlined in red.

Read about how the hemp stampers were used to process hemp:
1752: HEMP MILL IN BETHLEHEM PENNSYLVANIA

Reproduced with the gracious permission of the authors and the Historic Bethlehem society:
459 Old York Road, Bethlehem, PA 18018
610-882-0450, fax: 610-882-0460