Rotating #Mathematical #Table , Sinclair's #Freight #Computerhttps://www.si.edu/object/rotating-mathematical-table-sinclairs-freight-computer:nmah_690834
#1860s
If you #search for #mathematics it gives you 965 #results :https://www.si.edu/search/collection-images?edan_q=mathematics&edan_fq=media_usage%3ACC0&oa=1
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