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P. J. Ogle's Improved Protractor
Circular protractor with one straight edge, and two moveable rings (one with clamps) which rotate against the inner and outer scales. The inside ring measures 90° four times. The middle ring has North, South, East and West plates screwed on to it. Outer ring has four lots of 90°. Made of white metal - either electrum or nickel, with engraved scales. Made by J DAVIS & SON, LONDON & DERBY, Diameter = 291mm.
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Object Details
| ID: | ZBA0153 |
|---|---|
| Type: | Protractor |
| Display location: | Not on display |
| Creator: | Davis & Son J. |
| Date made: | circa 1900 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 14 x 303 x 303 mm |
| Parts: | P. J. Ogle's Improved Protractor |
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