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telephone
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. -
car
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. -
radio
in 1901 Guglielmo Marconi developed, demonstrated he first transatlantic radio signal. -
The Great Migration
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. -
Emergency Quota Act
on may 19 The Emergency Quota Act 1921 restricted immigration into the United States. -
Immigration Act 1924
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 -
Television
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. -
black thursday
Thursday, Oct. 24, 1929,the Dow Jones Industrial Average plunged 11% -
Black Tuesday
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% -
state of us economy in1933
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. -
Franklin D. Roosevelt elected President
in 1932 Franklin D Roosevelt was elected presedent manly because hoover was blamed for the great depression -
21st amendment
the United States Constitution repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide Prohibition on alcohol -
Hoover Dam constructed
t was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt. -
Frisbee invented
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 -
GI Bill of Rights
the G.I. Bill, was a law that provided a range of benefits for returning World War II veterans -
computer
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. -
internet
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 -
18th ammendment
the United States Constitution effectively established the prohibition of alcoholic beverages in the United States
