3. Benjamin Franklin (1706-1790) "Nothing but money is sweeter than honey." Franklin wrote that. But for him, money was merely a means to an end. At age 42, he retired from business, a rich man, to devote himself to public causes and scientific experiments, library, a fire insurance organization, a night watch, a city hospital, a city college, (the future University of Pennsylvania), and the American Philosophical Society, which still meets in Independence Hall. Franklin's portrait, with lightning flashing inside, is surrounded by the words: "scientist, citizen, inventor, writer, soldier, diplomat, leader, statesman, printer, essayist" To the right is his famous quote at the 1776 Declaration of Independence meeting, "Gentlemen, we must now all hang together, or we shall most assuredly hang separately."

4. When Franklin published his findings, they created a sensation. He became known as “The Newton of Electricity.” But the pure scientist was also an inventor of useful things, among them: bifocals, the Franklin stove, the lightning rod, the copying press, and a device, believe it or not, for electrocuting( 电刑 ) turkeys. Benjamin Franklin's Kite Experiment

5. Some Sample Maxims from Poor Richard's Almanac by Benjamin Franklin  Drive thy Business, or  He that falls in love with himself will  Where there's Marriage without Love, there will be  Write with the learned, pronounce with  Three may keep a secret, if  Dost thou love life? Then do not squander time; for  A good conscience is a continual  When befriended, remember it. When forget it.  Light-heel'd mothers make daughters.  A sleeping fox catches no  No gains without it will drive thee have no rivals Love without Marriage. the vulgar( 粗俗 ). two of them are dead. that's the stuff life is made of. Christmas. you befriend, leaden-heel'd poultry( 家禽 ). pains.

6. A Versatile Person, Franklin Was Also an Inventor of Franklin Stove and Bifocals Here is a Franklin stove, also known as the circulating( 循 环, 流通 ) stove.

7. Bifocals Bifocals are eyeglasses that have corrective lenses containing two different lens powers. A person wearing two different styles of cosmetic( 化妆 ) contact lenses, which may owe a lot to B. Franklin

8. Benjamin Franklin's Kite Experiment

9. The End