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Show 15th-18th Century Sundials Were Elaborate Devices The most elaborate sundials ever made were the portable, watch-sized instruments designed in Europe between the 15th and 18th centuries, says Collier's. 4 Besides a compass, some contained con-tained as many as 15 devices, among them being, for example, dials for determining the nocturnal noctur-nal hour by either the moon or certain stars, an adjustment for changes in latitude, a diagram showing planetary positions and a contrivance for ascertaining the time when the sun and moor would rise and set. , |