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Who invented bifocal eyeglasses and a clean-burning stove and helped develop the U.S. postal system?
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Who invented bifocal eyeglasses and a clean burning stove and helped develop the US postal system?
Benjamin Franklin invented bifocal eyeglasses and a clean burning stove. He also played a key role in developing the U.S. postal system.
How does a government bureaucracy develop?
to slow things as much as possible,prevent progress
How did slavery develop in the Americas?
In 1619 the first slave arrived and it grew from there when indentured servants didn't work out. When the cotton gin was invented the need for slaves became ever greater because more cotton could be grown, so by 1860 there were about 4 million slaves in the southern states.
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give americans jobs
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Vinyl was first invented in 1920 by scientists who wanted to develop a material that would help to manufacture everyday products that were easier to make, more durable, and cheaper than what was available. Today, Vinyl has become the second largest manufactured and sold plastic resin in the entire world.
Who invented bifocal eyeglasses and a clean burning stove and helped develop the US postal system?
Benjamin Franklin invented bifocal eyeglasses and a clean burning stove. He also played a key role in developing the U.S. postal system.
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he invented fractions he invented fractions He invented Calculus. but he died from cat rabies
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god invented smog
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150 years, after microscopes were invented.
What was invented in the early 1970's that helped develop computers?
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No, it was invented by the Englishman Sir Humphry Davy, but Edison develop better versions.
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In the 1980s, IBM was the first company to develop the graphics card.
What did Frederick Banting invent or discover or develop?
what diid dr.fedrick innevented what did Dr.Fedrick invented
