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The Telephone was the invention of a captain John Taylor in 1844. This instrument used four air horns to communicate with vessels in foggy weather.
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the first automobile was developed by Carl Benz it was a one-cylinder two-stroke unit which ran for the first time on New Year's Eve 1879.
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in 1901 Guglielmo Marconi developed, demonstrated he first transatlantic radio signal.
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he Great Migration was the movement of 6 million African Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1910 and 1970.
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on may 19 The Emergency Quota Act 1921 restricted immigration into the United States.
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a United States federal law that limited the annual number of immigrants who could be admitted from any country to 2% of the number of people from that country who were already living in the United States
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The first known photograph of a moving image produced by Baird's "televisor", circa 1926 and the first electronic tv came out to the public in 1936.
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Thursday, Oct. 24, 1929,the Dow Jones Industrial Average plunged 11%
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when panicked sellers traded nearly 16 million shares on the New York Stock Exchange (four times the normal volume at the time), and the Dow Jones Industrial Average fell 12%
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n 1933, 25 percent of all workers and 37 percent of all nonfarm workers were completely out of work. Some people starved; many others lost their farms and homes.
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in 1932 Franklin D Roosevelt was elected presedent manly because hoover was blamed for the great depression
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the United States Constitution repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide Prohibition on alcohol
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t was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt.
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in 1938 fred morrison and future wife were offered 25 cents for a cake pan that they were tossing back and forth a beach in Santa Monica, California and decided to make a buisness
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the G.I. Bill, was a law that provided a range of benefits for returning World War II veterans
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The bipolar transistor was invented in 1947. From 1955 onwards transistors replaced vacuum tubes in computer designs, giving rise to the "second generation" of computers.
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The first message was sent over the ARPANET from computer science Professor Leonard Kleinrock's laboratory at University of California, to the second network node at Stanford
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the United States Constitution effectively established the prohibition of alcoholic beverages in the United States
