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Hexamer, Charles John (09 May 1862–15 October 1921), civil engineer and political advocate for German-American causes, was born in Philadelphia, Pennsylvania, the son of Ernest Hexamer, a civil engineer, and Marie Klingel. His father was a prominent “forty-eighter,” one of the wave of educated, liberal German immigrants who came to the United States after the European revolutions of 1848. Hexamer attended the University of Pennsylvania, receiving a B.S. in 1882, an A.M. in 1884, and a Ph.D. in 1886. He also received an LL.D. from the National University in 1899. He married Annie Josephine Haeuptner in 1891 and worked as an engineer in Philadelphia from 1882 until his retirement in 1917. He authored ...