Posted by 6CarlyN on September 19, 2011 at 10:33am
Chapter 8, section 1Technology and City Life-Engineering innovation like Brooklyn BridgeCities expanded upward and outwardin 1870 only 25 cities had a population of 50,000 or more by 1890 there were 58 cities with that big of populationdo to industional jobs 4 out of 10 americans moved to the cityArchitects were able to design taller builds because of two factors:elevators and the development of internal steel skeletons to bear the weight of buildings
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