=Hackett, Horatio Balch.= _Ms._, 1808-1875. A Baptist clergyman, professor at Newton Seminary, Massachusetts, 1839-70, and from 1870 till his death professor in Rochester Seminary, New York. He was one of the American Revisers of the Bible, and editor of Smith’s Bible Dictionary. A Commentary on the Original Text of the Acts of the Apostles is his chief work. Others are, Memorials of Christian Men in the War; Illustrations of Scripture by a Tour in the Holy Land. _See Memorials of, 1876._ =Hackett, James Henry.= _N. Y._, 1800-1871. A popular actor, noted for his impersonation of Falstaff. Notes and Comments on Shakespeare. =Hackley, Charles William.= 1808-1861. An Episcopal clergyman who was professor of mathematics at Columbia College from 1843 until his death. Treatise on Algebra; Elementary Course in Geometry; Elements of Trigonometry. =Haddock, Charles Brickett.= _N. H._, 1796-1861. Nephew of D. Webster, _infra_. A professor of rhetoric at Dartmouth College, 1819-50, and chargé d’affaires in Portugal, 1850-54. He originated the railway system of New Hampshire, and also the system of common schools in that State. His Addresses and Miscellaneous Writings appeared in 1840. =Hadley, Arthur Twining.= _Ct._, 1856- ----. Son of J. Hadley, _infra_. President of Yale University from 1899; previously a professor of political science there. Private Property and Public Welfare; Railroad Transportation, its History and Laws; Report on the System of Weekly Payments. _Put._ =Hadley, James.= _N. Y._, 1821-1872. A philologist who was Greek professor at Yale University, 1848-72. Lectures on Roman Law; A Greek Grammar; Elements of the Greek Language; Essays, Philological and Critical; Brief History of the English Language. _See The New Englander, January, 1873._ _Ap._ =Hageman, Samuel Miller.= _N. J._, 1848- ----. Grandson of S. Miller, _infra_. A Presbyterian clergyman who has published Once, a novel; and several volumes of poems, including Vesper Voices; Greenwood, and Other Poems; Silence; Saint Paul. =Hagen, Hermann August.= _P._, 1817-1893. An entomologist of prominence who came to Cambridge from Königsberg in 1870, and was professor of comparative zoölogy at Harvard University. Catalogue of Neuropterous Insects in the British Museum; Synopsis of the Neuroptera of North America; North American Astacidæ; Some Insect Deformities. =Hagen, Theodor von.= _G._, 1823-1871. A musician who came to New York city from Germany in 1854. Civilisation und Musik; Musikalische Novellen. =Hager, Albert David.= _Vt._, 1817-1888. A geologist, from 1877 librarian of the Chicago Historical Society. Geology of Vermont (with C. H. Hitchcock, _infra_); Economic Geology of Vermont. =Hager, Mrs. Lucie Caroline [Gilson].= _Ms._, 1853- ----. A Massachusetts writer who has published Boxborough, a New England Town and its People. =Hagert, Henry Schell.= _Pa._, 1826-1885. A noted _nisi prius_ lawyer of Philadelphia. Poems, with Memoir by C. A. Lagen (1886).