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Since many inventions are developed independently by more than one person, it is possible that the invention of bifocals may have been such a case. [3] John Isaac Hawkins, the inventor of trifocal lenses, coined the term bifocals in 1824 and credited Benjamin Franklin. [citation needed]
Benjamin Franklin (January 17, 1706 ... His numerous important inventions include the lightning rod, ... Franklin stove, bifocal glasses and the flexible urinary ...
Historians have from time to time produced evidence to suggest that others may have preceded him in the invention; however, a correspondence between George Whatley and John Fenno, editor of The Gazette of the United States, suggested that Franklin had indeed invented bifocals, and perhaps 50 years earlier than had been originally thought. [56]
The informative, well-framed and entertaining "Benjamin Franklin," premiering Monday on PBS, explores the life and times of our most colorful founder. Ben Franklin was the most famous American of ...
Benjamin Franklin invented wooden swim fins in 1717. [10] His original design consisted of 10-inch-long (250 mm) and 6-inch-wide (150 mm) palettes. Contrary to today's version of rubberized swim fins worn on the feet, Franklin's swim fins were originally intended for use on a person's hands.
No, it was not started to help farmers, and Benjamin Franklin did not invent it. Brush up on the real history of daylight saving time before we fall back Nov. 3 No, Ben Franklin Did Not Invent ...
The first half of the 18th century saw British optician Edward Scarlett perfect temple eyeglasses which would rest on the nose and the ears. The innovations presented by Scarlett would not only spark some to look at aesthetic customization of eyewear for fashion within Europe but also lead Benjamin Franklin to invent bifocals in colonial America. [12]
Staring out from the $100 bill, looking more like a wise old uncle than Founding Father, Benjamin Franklin seems an easy guy to like. And if anyone belongs on U.S. currency it's this colonial ...