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Second Industrial Revolution (1870-1914)
new innovations in steel production, along with petroleum and electricity, led to increased communication, productivity, and speed of transportation.
Alexander Graham Bell 1876
Invented the telephoneand revolutionized long-distance communication.
Thomas Edison 1897
perfected the design of the light bulb, making it practical for home use
Nikola Tesla 1888
harnessed AC power for use in a power grid and made it famous by using it to power the Chicago World's Fair in 1893