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Benjamin Franklin and Bifocals

Benjamin Franklin and Bifocals. Benjamin Franklin

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Page 1: Benjamin Franklin and Bifocals. Benjamin Franklin

Benjamin Franklin and

Bifocals

Page 2: Benjamin Franklin and Bifocals. Benjamin Franklin

Benjamin Franklin

Page 3: Benjamin Franklin and Bifocals. Benjamin Franklin

The Inventor: Benjamin Franklin

• 1706 - Born in Boston, Massachusetts on January 17, 1706

• 1728 - Opened his own Printing Office in Philadelphia.

• 1752 - Kite experiment• 1753-1755 - Invented bifocals• 1790 - Died in Philadelphia, Pennsylvania

Page 4: Benjamin Franklin and Bifocals. Benjamin Franklin

Pictures of Bifocals

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are needed to see this picture.QuickTime™ and a

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Benjamin Franklin invented bifocals between the years of 1753-1755.

Page 5: Benjamin Franklin and Bifocals. Benjamin Franklin

History and Importance of Bifocals

Benjamin Franklin wore glasses, and after the age of 40 he needed another pair for reading. In order to solve his problem, he split the lenses of each pair of his glasses. He looked through the top half for distances and the bottom half for reading. This was the invention of the bifocal glasses.

Franklin’s invention made life easier for people. They would no longer have to constantly change their glasses to see things in the distance and for reading.

Page 6: Benjamin Franklin and Bifocals. Benjamin Franklin

A Few of Benjamin Franklin’s Other Inventions

Catheter

Franklin Stove

Glass Armonica

Lightning Rod

Odometer