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Code 6763
EUR 1500.00
In stock

EUR 1500.00
In stock

used

1606904142Code 6763 Antique sextantBrass sextant made in the mid 19th century, complete with lenses and placed in its beautiful original mahogany box complete with key and brass handle and hinges. Flap and vernier of engraved silver, boxwood handle, 3 colored glasses for the fixed mirror and 4 for the mobile one, three telescopes, sun filter, adjustment key, a microscope for reading the vernier, graduated from 0 to 150 ° , mirror of index and horizon. Box size 25.5x23 H 12.5 cm - 10x9 H 4.9 inches. Excellent condition and fully functional, complete with custom-made support base.

The sextant is an ancient astronomical instrument used to measure the height of a celestial body (for example the Sun): the sextant is placed in a vertical plane and, looking through the aiming device, the visible horizon line is sighted through the non-silver half of the fixed mirror. By moving the alidade, with which the mirror is integral, the light rays coming from the star and subsequently reflected by the moving mirror and by the silver half of the fixed mirror are returned by the latter in the direction of observation: if if you look through the sighting device you see the image of the star, obtained by double reflection, coinciding with the horizon line. The height of the star is expressed by the angle whose value is read on the graduated scale. The filter is used when the star to be sighted is the Sun.

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