adjustable sundial

adjustable sundial

This usually consists of a horizontal dial with a small number of concentric hour scales, each for use in a single latitude, with a gnomon whose inclination can be varied. Dials of this type were incorporated in some of the fine astronomical compendia made by Christopher Schissler of Augsburg between 1555 and 1565, and were popularized by Michael Butterfield.

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Industry/Domain: Chronometry
Category: Clock
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