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Invention Of Bifocal Lenses By Benjamin Franklin | Invention By Founding Father Of America
0:35
YouTubeTravel Thoughts
Invention Of Bifocal Lenses By Benjamin Franklin | Invention By Founding Father Of America
Those who rely on glasses to view the world clearly owe a debt of appreciation to the Romans, who discovered how to use glass to magnify objects. Rich Romans commissioned glass blowers to create glass spheres, similar to modern magnifying glasses. When compared to small text, the letters and words became legible. Benjamin Franklin, a scholar ...
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Benjamin Franklin invented bifocals and the lightning rod but gave his world-changing ideas away for free. #history #historyfacts #didyouknow | Beyond Legends
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16K views · 162 reactions | Diplomatic pressure led Benjamin Franklin to invent the worlds first bifocals out of sheer necessity. #history #didyouknow #inventions | Revealed | Facebook
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