The Biographical Dictionary of America/Appleton, Daniel Sidney
APPLETON, Daniel Sidney, publisher, was born in Boston, Mass., April 9, 1824, fourth son of Daniel and Hannah (Adams) Appleton. In 1843 he was graduated at Yale college, studied one year in the Yale law school, and entered his father's business. He acted as manager of the London branch until 1849, when he was recalled to the United States by the illness of his father, on whose death he was admitted to partnership and assumed direction of the mechanical departments of the house, acting also as its financial adviser. Failing health caused him to sever his connection with the firm some years before his death, though he continued to hold an advisory interest. He was a member of the Union, the Century, the University, and the New York yacht clubs, and a director in several financial institutions. He died Nov. 13. 1890.