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Detailed Record

Title: Surveyor's compass made by Gregg & Rupp, New York, 1767-1793 Accession Number: 1967.89 Category: INSTRUMENTS - COMPASSES Type: vernier compass Maker: Gregg & Rupp Place: USA, NY, New York Date: 1767 - 1793 Materials: Description: Vernier compass, dating from the late 18th century, used in topographical land surveys. Instrument is brass with silver dial. Level on either side of dial at right angles to each other. Dial marked "Gregg & Rupp, New York" In box 15 1/2" x 7 1/2". This instrument takes its name from Pierre Vernier (1580-1637), a French mathematician and inventor, who developed fractional scale settings for instruments.

Mystic Seaport Image ID m182365    Information regarding reproductions