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The Astrolabe

This scientific instrument of the Middle Ages was used for both astronomical and terrestrial observations. It also served as an analogue computer, particularly for determining the local time

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Scientific American Magazine Vol 230 Issue 1This article was originally published with the title “The Astrolabe” in Scientific American Magazine Vol. 230 No. 1 (), p. 96
doi:10.1038/scientificamerican0174-96