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Slide rule
Slide rule
Folding navigational Slide Rule.
Material: Boxwood with brass fittings.
Graduations: On upper surface, from top, are 4 logarithmic scales A, B, C, D, divided to whole numbers and subdivided into 1/10s and 1/20s as space permits. A line of "HOURS" 0 - 6 by 5'. "Latitudes" 0 - 90 by 1. "CHORDS" 0 - 90 by 1. "Inclina Meridi" 0 - 90 by 1.
Each line fitted with a brass stud. Lower surface (when open) forms a 24" rule divided to 1/8". It also carries sectorial lines of "POLYGONS", "Cho", "Tan" each line fitted with a brass stud.
Folding navigational Slide Rule.
Material: Boxwood with brass fittings.
Graduations: On upper surface, from top, are 4 logarithmic scales A, B, C, D, divided to whole numbers and subdivided into 1/10s and 1/20s as space permits. A line of "HOURS" 0 - 6 by 5'. "Latitudes" 0 - 90 by 1. "CHORDS" 0 - 90 by 1. "Inclina Meridi" 0 - 90 by 1.
Each line fitted with a brass stud. Lower surface (when open) forms a 24" rule divided to 1/8". It also carries sectorial lines of "POLYGONS", "Cho", "Tan" each line fitted with a brass stud.
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Object Details
| ID: | NAV0201 |
|---|---|
| Type: | Slide rule |
| Display location: | Not on display |
| Creator: | Corson, Robert |
| Date made: | 1907 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 6 mm x 311 mm x 38 mm |
| Parts: | Slide rule |