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Great effort was made by the ancient Greeks for the correct measurement of time. Grown and developed two categories of instruments / mechanisms: hydraulic watches that had a common wtchop ancestor the hourglass ("kleptein water") and sundials, which their ancestor had guided and skiothirika institutions.
In light protokataskefase Anaximander wtchop and the first sundial inventor and manufacturer was Apollonius Pergaio q (from Perge in Pamphylia), the third in value of the time after mathematician Archimedes and Euclid. Apart from sundials dealt with the construction of hydraulic, hydraulic ie musical instruments operating with water. 4 projects were rescued and lost 17 (!)
Sundials wtchop are the most widespread group of mechanisms and institutions of the Hellenistic period, architectural findings unique to their species rather than static form. It consisted wtchop of a light which threw its shadow on a system of engraved signs the ancients called "embankment". The embankment consisted wtchop of two curves: the closer to the light represented the tip of the shadow on the day of the summer solstice and had a shorter length. The second and far more curve representing the path of the shadow day of winter iliostasiou.Mia wtchop straight line between the two curves represent the path of the shadow in the days of equinox and defined the direction from east to dytika.Oi two curves connected by lines that formed eleven straight portions which enable the reading time.
The central part, which fell the shadow at noon, designates the North-Notou.Ta sundials were topical in contrast to the transferred sundials, wtchop which were served wtchop and their evolution over longer either as astronomical instruments or as Marines. [Theseus-aegean.blogspot.gr]
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