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1509716272Code 5905 Antique liquid compassLiquid compass on universal joint mounted on wooden plank, English manufacture of the end of the XIX century. This compass has a brass cylindrical box, named mortar; on its bottom a hard metal stem is fixed, named sensitive element; on this element it is leaned a compass card, appropriately fixed: the zero has to coincide with magnetic polarity. To limit friction, mortar is filled with a low freezing point liquid, that has to quench rapidly swings, and it is closed with a strong glass protection. Very good condition. Compass diameter cm 16.5, plank cm 27x25.
The earliest historical notes on the use of magnetic power in Europe are dated back to the end of the 12th century or the beginning of XIII century and attribute to the Amalfiers the exploitation of the properties of the magnet. The cardanic suspension made its first appearance around the middle of the XVI century. An exact description is given in the brief compendium “De la esfera y de la arte de navegar” by Martin Cortés (1551), which gives precise instructions to make a compass. The improvement of this instrument is largely attributed to the discoveries of new lands, from the mid-XVcentury.
Vintage compasses are measuring instruments that had always a large public of collectors, that choose them between all antique instruments.
5/5
PATRIZIA - ITALIA 08/01/2018
Gentile sig.ra Giorgi, la bussola è veramente bella e d'effetto ed è stata molto apprezzata da tutti i partecipanti al regalo nonché dal destinatario
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Antique compasses
Code 5905 Antique liquid compass
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