sector
Graduations: On upper surface, from top, 6-0 inscribed "Frens Foot". 6-0 inscribed "Rhy Foot". 0-90 inscribed "Chords". 0-90 inscribed "Cho". 0-60, 0-60 inscribed "Ch". 0-10, 0-10 inscribed "Lin". 0-75, 0-75 inscribed "Sec". 12-6 inscribed "Polygons". 0-100 inscribed :lin". 0-90 inscribed "Lat". 1-12, 1-12.
On reverse surface, from top, 6-0 inscribed "Ams Foot". 7-0 inscribed "Eng Foot". 0-VI inscribed "Houer". 0-45, 0-45 inscribed "Tan". 0-90, 0-90 inscribed "Sin". 45-75, 45-75 inscribed "Tan. 10-2, 10-2. 0-45 inscribed "Tan". 0-90 inscribed "In Mer". 6-12. Folding rule not graduated.