- Subject
- Calculation
- Item type
- Object
- Primary inscriptions
- "J [star] CUFF FECIT."
- Physical material
- Brass
- Object type
- Sector
- Dimensions
- Height: 161mm Width: 38mm Depth: 3mm
- Inventory No
- 50210
Description
Brass six inch sector with fixed support blade. The signed side carries sectoral scales of sines (S) and tangents (T and t) and single logarithmic scales of numbers (double), sines and tangents. The reverse has lines (L), chords (C) and secants (s), with single scales for decimal inches and a decimal foot, and latitude (L), hours (H), inclination of meridian (IM) and chords (C).
