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I dont know if this is right because the question didn't make sense so hope this helps! :
On May 18, 1896, the U.S. Supreme Court case Plessy v. Ferguson ruled that separate-but-equal facilities were constitutional. The Plessy v. Ferguson decision upheld the principle of racial segregation over the next half-century
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The answer is 1920 i hope this helped <3
Not sure.I'm having trouble seeing it.Is it math?
Radiation its visible light that we see during the day.
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Wood engraving by Gustave Dore (1832-1883) taken from 'London: a Pilgrimage', published by Grant & Co in 1872. Behind the group of exhausted-looking workers in the foreground, others can be seen stoking the fires beneath the gas retorts, sealed vessels where, at high temperatures, the coal was broken down into tar, coke and gas. From the 19th century, manufactured gas was made by the distillation of coal, predominantly for use in lighting. In 1869, the writer Blanchard Jerrold suggested a collaboration with Dore on a comprehensive portrait of London. Entitled 'London: a Pilgrimage', the book contained 180 engravings and although a commercial success, there were criticisms that Dore had concentrated on the poverty of the city.
