We have a soft spot for circular and spherical diagrams in astronomical manuscripts. So here's one for #sciencesaturday from a French manuscript from ca. 1600 titled "Abregé cosmographique : divisé en deux livres." [MS Fr 122]⠀
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This part seems to be about constructing an astrolabe, that scientific instrument common in the Middle Ages and Renaissance as a means to identify stars, and use them to measure one's latitude (or local time, knowing the latitude).⠀
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#science #diagram #astrolabe #astronomy #manuscript #french #1600 #librariesofinstagram #houghtonlibrary #harvardlibrary #specialcollections #rarebooks #earlymodern
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