HARDY, Arthur Sherburne, author, born in Andover, Massachusetts, 13 August, 1847. He studied for a year at Amherst, and in 1865 entered the United States military academy, where he was graduated in 1869. Subsequently he became 2d lieutenant in the 3d artillery, and, after a few months' service as assistant instructor of artillery tactics in the academy, he was assigned to garrison duty in Fort Jefferson, Florida In 1870 he was honorably discharged from the United States army at his own request, and until 1873 held the professorship of civil engineering and applied mathematics in Iowa college, Grinnell. He then spent one year in study at the Ecole imperiale des pouts et chaussdes in Paris. On his return he was professor of civil engineering in the Chandler scientific school of Dartmouth until 1878, when he accepted the chair of mathematics in the college proper. In 1873 he received the degree of Ph. D. from Amherst, and he is a member of various scientific societies. Professor Hardy has published "Elements of Quaternions" (Boston, 1881): "Imaginary Quantities," translated from the French of Argand, with notes (New York, 1881); and " New Methods in Topographical Surveying" (1884). Besides these, he is the author of a poem entitled "Francesca of Rimini" (Philadelphia, 1878), and of the two novels, "But yet a Woman" (Boston, 1883), and "The Wind of Destiny" (1886).