Convert line (button makers) to chain (Ramsden or Engineer)
Selected category: length.
Definition and details for line (button makers):
U.S. button maker use the "line" unit of length to measure buttons. This unit is equal to 1/40 inch or 0.635 mm. It was probably introduced by German immigrants, who used since ninth century a different version of "ligne" equal to 1/40 inch to measure buttons.
Definition and details for chain (Ramsden or Engineer):
Ramsden'S chain is a unit of length used by American surveyors in the U.S. It is equal to 100 feet or 30.48 meters.