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Octant, circa 1840
octant
INSTRUMENTS - OCTANTSPORTUGAL
Circa 1840
0 x 12.00 x 0
Ebony octant with brass fittings and index arm, dated ca 1840. Arc and vernier made of ivory. Arc graduated from -1 deg. to 110 deg. in 20 minute increments. Tangent screw on back of index arm. Equipped with 3 index shades and 3 horizon shades and double peep. Name plate missing. Possibly Portuguese (per donor).
1986.94.19