div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=-facts-about-o-in-9th-century-baghdad-three-mathematiciansthe-banu-musa-brothersinventedhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: standleyhistoryweeblycom · FACTS ABOUT O In 9th-century Baghdad three mathematicians—the Banu Musa brOtherS—invented ingenious trick devices and puzzles that were like the loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentsusreader030viewer20220411235d230a5088c993d0068ce5e0html5thumbnails1jpg width=140 height=200 divdiv
