Numbers in the News: Benjamin Franklin Science Article for Students | Scholastic Science World Magazine
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Image of BIFOCALS, 1760s. - Benjamin Franklin's Sketch For Bifocal Eyeglasses, Which He Is Credited With Inventing. From Granger - Historical Picture Archive
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WION on X: "#TodayInHistory | 1785: Benjamin Franklin announces invention of bifocal glasses https://t.co/lRsvjQSQgh" / X
Benjamin Franklin's Visionary Innovation: The Creation of Bifocals – StMU Research Scholars
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