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Portable universal (all latitudes) sundial
explaining its use and historical context
Legend has it that the Nocturnal Astrolabe was invented by Raimund Lill to administer doses of medicine to patients during the night
This is a replica of a Nocturnal and Tide Computer from 1570 signed by Humphrey Cole
Orient the compass north and let the shadow tell your solar time
Altitude Ring Dial - Miniature - Desk Model Scientific Portable universal (all latitudes) sundialMiniature sundial, Height sundial. From 16th 17th centuries. This dial is a solar altitude clock. It takes ts name because the parameter of its construction is based on the altitude of the Sun. The dial is composed of a circular band perforated by two offsetting symmetrical holes through which the sun rays pass and are projected as a small elongated spot of light on the hourly line etched on the interior of the dial. Crafted of brass comes complete
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