Title: Parallel ruler |
Accession Number: 1963.716
Category: INSTRUMENTS - PARALLEL RULES
Type: parallel ruler
Date: After February 24, 1880
Description: Ebony parallel rulers. At the ends of the rulers are brass fittings with brass connecting bars. Tubular fittings revolve on a pin permitting one ruler to be flipped over the other. Patent date 2/24/1880.
Mystic Seaport Image ID m167071 Information regarding reproductions