ROBERT GORDON:
Look at a few of the things that were invented in the special century after 1870, starting with the electric light, the greatest invention of all. And now let's look at two of the great inventions of all time. First, we have running water, which eliminated the need to carry water into the house in pails.
And then we have the flush toilet, which eliminated the need to go outside into the bitter cold to an outhouse. And here we have a double invention, central heating and air conditioning. We have the telephone invented in 1876. We have the television set, partly invented here in San Francisco by Philosophy Farnsworth, and then look what we have hidden down here, a refrigerator, which eliminated the contamination of food.
And here we have the Golden Gate Bridge, an example of the tremendous investment in infrastructure that made our economy grow so fast in the middle of the 20th century. This bridge was finished in 1937.
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