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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, ... Franklin was a prodigious inventor. ... Franklin stove, bifocal glasses and the flexible urinary catheter.
Because on this day in 1785, Benjamin Franklin invented the bifocal glasses. Nearly two centuries later, on May 23, 1962, surgeons successfully reattached the severed arm of a Boston boy named ...
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.
Franklin's electrostatic machine on display at the Franklin Institute. Franklin's electrostatic machine is a high-voltage static electricity-generating device used by Benjamin Franklin in the mid-18th century for research into electrical phenomena.
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
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]
Collecter, Ward Harris, holds a talking doll with a metal torso that was invented by Thomas Edison, in San Francisco, Calif., Feb. 9, 1949. Harris holds in his other hand the inside mechanicals of ...