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Inventions (1754 - 1789)


1784 - The bifocal lens is invented (Benjamin Franklin, United States)

"While living in Paris, Franklin hated having to change constantly from reading glasses to distance glasses. He directed an optician to cut two pairs of lenses horizontally in half and mount them in a new frame, with the reading lens at the bottom and the distance lens at... Read MORE...


1784 - The oil lamp is invented (Aimé Argand, Switzerland)

"Argand burner, first scientifically constructed oil lamp, patented in 1784 in England by a Swiss, Aimé Argand. The first basic change in lamps in thousands of years, it applied a principle that was later adapted to gas burners. The Argand burner consisted of a cylindrical... Read MORE...

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