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Portable sundial: UC 16376

UC 16376, fragment of a portable sundial

This fragment of a sundial is one of the few surviving examples of a portable clock. Two features important for a sundial raise problems for a portable version: a sundial must be oriented in a certain way (normally East-West) and the sundial must be placed absolutely horizontal on its ground. The latter could be arranged, by hanging a plumb froma line attached to the clock. For the orientation it was more difficult to find a solution. See the movie

Sloley 1931: pl. XVII.4


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