Mathematical instruments
Mathematical instruments (undated) comprising three wooden rules, one of which is inscribed with the name of the Maker: 'Gilbert and Gilkerson Tower Hill'; and one rule of which is thought to be a navigational instrument. The larger of the rules is a sliding rule.
NOTE: Appointment must be made with Archivist in order to view object.
NOTE: Appointment must be made with Archivist in order to view object.