Calculating machines 21 - Public domain book illustrationRelatedSlavery 21 - Public domain book illustrationCalculating machines 22 - Public domain book illustrationCalculating machines 19 - Public domain book illustrationCalculating machines 17 - Public domain book illustration2010-04-20 Spenge 181 - Public domain book illustrationCalculating machines 24 - Public domain book illustrationMoreCalculating machines 21 - Public domain book illustrationfile_downloadDownloadcrop_originalOrder Printrate_reviewdescriptionSummarylabel_outlineTags1910 s diagrams1911 illustrationscalculators in artimages from encyclopaedia britannicabook illustrationsproject gutenbergencyclopedia britannicaencyclopediadate_rangeDate1910createSourceWikimedia CommonslinkLinkhttp://commons.wikimedia.org/copyrightCopyright infoPublic Domain
