Quackenbos
JOHN DUNCAN, an American physician; born in New York, N. Y., April 22, 1848; was graduated at Columbia College in 1868 and at the College of Physicians and Surgeons in 1871; began practice in New York; became Adjunct Professor of the English Language and Literature at Columbia College in 1884; Professor of Rhetoric in Barnard College in 1891-1893. He then became a specialist in mental diseases and lectured extensively on scientific and literary topics. He wrote "History of the World"; "History of Ancient Literature"; "Tuberculosis"; "Magnhild" (1919), etc. A specialist in mental diseases.