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Free gallery of gifs of sundialsThis instrument to measure time by the position of the sun takes being used since antiquity. It consists of a rod and a table where his shadow is cast.
All the gifs of sundials in this free gallery to use as you like The first sundials were first manufactured in the Greco-Roman era, and there are different types of sundial. The best known and common is made up of a table drawn brands and a rod that casts its shadow over them. Thus, the shadow is what tells us what time it is. Some of the types are the equatorial sundial, horizontal and vertical clocks, and analemmatic sundial. All are based on projected shadows, and each has a different degree of reliability, depending on their accuracy.