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NAUTICAL BRASS SEXTANT
Sextant in old brass with a leather case and screen-printed glass lid.
€99.00
Tax included
Sextant in old brass with a leather case and screen-printed glass lid.
The sextant was designed for sea navigation. It allows to obtain the angular height of the sun over the horizon. It was invented in the 1730s by two people: John Hadley (1682-1744), English mathematician, and Thomas Godfrey (1704-1749), an American inventor. He quickly replaced the astrolabe and octant as the main instrument for navigation. The sextant consists of a small telescope, to look at the horizon, two mirrors (which reflect the image of the object), filters (for the sun), a movable arm and a graduated circle arc. The opening angle is 60º, one sixth of a circle, hence the name of the instrument.
MAR332017
6.00 cm
13.00 cm
12.00 cm
0.84 Kg
Specific References
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