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From immemorial times, humanity has known that the changing length of an object shade indicates the time of the day and this shade is shorter towards midday and is extended towards the dusk. Without a doubt the first rudimentary sundial simply consisted of a stake nailed in the ground. These Sundials that we design, are denominated of "faltriquera", and they are dated from XVI century, whose original ones are showed in museums as the one of Nuremberg and the Maritime Museum of London and Madrid. This model is called “ Escorial”. It seems like a book and is lined in leather. Inside carries two brass plates finely engraved. A horizontal sundial consists of one dial plate, marked off in hours, and the gnomon which sits on the noon line and projects out from the dial plate. In order to tell the correct local time the gnomon must be parallel with the earths axis, or, in other words, that it should point towards the celestial pole. In the northern hemisphere, this means, for practical purposes, that the gnomon should point at the Pole Star. The chief advantages of the horizontal sundial are that it is easy to read, and the sun lights the face throughout the year. All the hour-lines intersect at the point where the gnomon's style crosses the horizontal plane. Since the style is aligned with the Earth's rotational axis, the style points true North and its angle with the horizontal equals the sundial's geographical latitude. Carries a booklet with the Sundial history and method of use.
- Thickness: 2.5cm.
- Height: 9.4cm.
- Width: 6,3cm.
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