Credit: Library of Congress
Benjamin Franklin is credited with the invention of bifocal glasses, which he sketched here for his friend George Whatley, a London merchant and pamphleteer. Benjamin Franklin to George Whatley, May 23, 1785.
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Franklin's Design for Bifocals, Benjamin Franklin to George Whatley, May 23, 1785.
Credit: Library of Congress
Benjamin Franklin is credited with the invention of bifocal glasses, which he sketched here for his friend George Whatley, a London merchant and pamphleteer. Benjamin Franklin to George Whatley, May 23, 1785.
