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Is Benjamin Franklin's invention of the bifocals still being used today?
Wiki User
∙ 11y ago
Yes, many people have bifocals.
Wiki User
∙ 11y ago
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What invention is Benjamin Franklin known for?
Being the third president, helping write the contitution, and fllying a kite
How did Benjamin Banneker's invention change the world how is his invention being used today?
Well we use the light bulb everyday or else their would be no light unless it was from the sun!!!
How did Benjamin Franklin invent glasses?
It's not easy to tell you when Franklin invented glasses, because they were well documented in Europe prior to 1300, i.e. 500 years before Franklin was born. Ben Franklin did invent a number of other things, including bi-focals.
What professions made Benjamin Franklin famous?
The first Postmaster General of the United States Started the first free library Oldest member of the Constitutional Convention Writer of Poor Richard's Almanac U.S. Diplomat
Where did Benjamin Franklin invent the biofocals?
Franklin was in Paris from 1777 to 1785. He first mentioned his bifocal lenses in 1784, and refers to them as "my invention" without giving any more detail. In 1779, he ordered some eye glasses, that were more time-consuming and expensive than normal, and it is POSSIBLE that the delay and cost were due to these being bifocal. A 1789 letter from a friend of Franklin states that Ben had been wearing double lenses for decades. In other words, the evidence is ambiguous. He might have invented them in Paris, or maybe while still in Philadelphia. Or he might have discovered them while in London, and simply claimed them as his idea.
What invention is Benjamin Franklin known for?
Being the third president, helping write the contitution, and fllying a kite
How did Benjamin Banneker's invention change the world how is his invention being used today?
Well we use the light bulb everyday or else their would be no light unless it was from the sun!!!
How did Benjamin Franklin invent glasses?
It's not easy to tell you when Franklin invented glasses, because they were well documented in Europe prior to 1300, i.e. 500 years before Franklin was born. Ben Franklin did invent a number of other things, including bi-focals.
What professions made Benjamin Franklin famous?
The first Postmaster General of the United States Started the first free library Oldest member of the Constitutional Convention Writer of Poor Richard's Almanac U.S. Diplomat
How have the bifocals been improved since they were invented?
It has improved by being more fashioned and letting people see clearly.
What major invention is being worked on currently?
a very important invention being worked on at this time is the sex robot.
What was Franklins job?
his job was first being a lawyer then house of representatives then a senator finally he resigned then ran for president.
Where did Benjamin Franklin invent the biofocals?
Franklin was in Paris from 1777 to 1785. He first mentioned his bifocal lenses in 1784, and refers to them as "my invention" without giving any more detail. In 1779, he ordered some eye glasses, that were more time-consuming and expensive than normal, and it is POSSIBLE that the delay and cost were due to these being bifocal. A 1789 letter from a friend of Franklin states that Ben had been wearing double lenses for decades. In other words, the evidence is ambiguous. He might have invented them in Paris, or maybe while still in Philadelphia. Or he might have discovered them while in London, and simply claimed them as his idea.
Who was the first president to have electricity?
The country's 23rd president Benjamin Harrison was in office when the White House was first wired for electricity. President Harrison, however, did not welcome the new invention with open arms. It has been reported that he and his wife were afraid of being shocked by the light switches on the wall, so they continued to use the old gaslights.
When did St. Benjamin die?
Saint Benjamin the Deacon was martyred by being impaled on a stake about the year 424 in Persia
What was Benjamin's plantation being used for after a nearby battle?
Benjamin's plantation was being used as a field hospital after a nearby battle, where wounded soldiers were brought for medical treatment.
What was the need for the invention of ether?
to stop people being sick
