Title: Sector, brass
Date: 1600 (approximate)
Original Format: photograph: negative
Description: Galileo is credited with having invented the instrument, which is also known as a proportional compass. See Galileo’s “Operation of the Geometric and Military Compass”; also “Scientific Instruments Ancient and Modern.” Mfg: Gottfriedt Reiff, Nuremberg, Germany.
Collection: Scientific Instruments
Caltech Archives ID: ST-WA-04
