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- 20th Century Biographical Dictionary of Notable Americans, Vol 3:290(CDAncestry Library shipped with TMG 1997) DOUGLAS, Silas Hamilton, chemist, was born in Fredonia, NY, Oct 15,1816,son of Benjamin and Lucy (Townsend) Douglas, grandson of Daniel and Lydia(Douglas) Douglas, and of Samuel and Lydia (DYER) Townsend;and adescendant of William (1610-1682) and Anne (Mattle) Douglas of Scotland,afterward of New London CT. He attended the academy in his native placeand received the degree of M.D. from the College ofphuysicians andsurgeons, Baltimore MD., in 1842. He practisedmedicine in Dearborn MI.,1843-44; served as assistant to theprofessor of chemistry at theUniversity of Michigan, 1844-45;lecturer on chemistry and geology,1845-46; professor of chemistry,mineralogy and geology, 1846-51; ofchemistry, pharmacy, medicaljurisprudence, geology and mineralogy,1851-55; of chemistry,mineralogy, pharmacy and toxicology, 1855-70; ofchemistry, 1870-75;and of metallurgy and chemical technology, 1875-77.From 1870 to=he was director of the chemical laboratory. He resigned hiscollegeduties in 1877. He published; Tables for QualitataiveChemicalAnalysis (1864); and Qualitataive Chemical Analysis (withProf.Albert B. Prescott, 1873; 3d ed.; 1880) He died at Ann Arbor, MI=Aug 26, 1890.
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1816 - 1890 (73 years)