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| Keywords: Benham harmonograph.png Charles Benham's harmonograph 1913 Things to make via http //www 1920-30 com/toys/things-to-make/harmonographs html Transferred from http //en wikipedia org en wikipedia by SreeBot Archibald Williams 1871 - 1934 presumed other versions 1934 Original upload log page en wikipedia Benham_harmonograph png Upload date User Bytes Dimensions Comment 2010-01-09 19 19 UTC Jarry1250 34419 bytes 237×481 <small><nowiki>Source http //www 1920-30 com/toys/things-to-make/harmonographs html Details to follow shortly </nowiki></small> Check categories 2012 February 7 en wikipedia Charles_Benham England 9 Economy of England Science and technology in the United Kingdom | ||||
