Search the Collection
Advanced Search

Case for plotting protractor

Date: c 1809
Overall (Closed): 40 x 177 x 177 mm, 450 g
Overall (Open): 20 x 355 x 177 mm
Medium: Wood, brass
Credit Line: ANMM Collection Gift from Dorothy Sharp
Classification:Tools and equipment
Object Name: Protractor case
Object No: 00028680

User Terms

    This case houses a ship's plotting protractor manufactured by the scientific instrument maker Matthew Berge. Made from polished flat wood, the case has brass hinges and hook catches, and a grooved interior in which the protractor snugly fits.
    SignificanceFor hundreds of years, protractors have been used to measure angles and circles. Plotting protractors were essential for safe water navigation, especially when using charts that did not come with a compass rose.
    HistoryMatthew Berge was an apprentice of the famed London scientific instrument maker Jesse Ramsden. After the death of Ramsden in 1800, Berge took over the firm and continued the business trading under the title 'Berge late Ramsden'. Optical instruments, levels, and sextants made and sold by Berge are generally signed 'Berge late Ramsden', while others such as gunner callipers and marine barometers are marked 'Berge' or 'M. Berge London'. Nathaniel Worthington, an apprentice for seven years, became Berge's successors upon his death in 1819.

    Additional Titles

    Web title: Case for plotting protractor

    Primary title: PROTRACTOR CASE

    Related People
    Manufacturer: Matthew Berge

    Discuss this Object


    Please log in to add a comment.