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The 19th Century
https://www.historycrunch.com/uploads/4/1/1/6/41169839/living-3_1.jpg
http://www.industrialheritage.eu/sites/default/files/i
nline-images/W-housing1_0.jpg
https://drloihjournal.blogspot. Child Labor (Mining) in the Industrial
com/2017/01/the-cholera-epi Revolution. From the Pennsylvania Coal
demic-of-1833-in-illinois.html Company in 1911.