HACKLEY, Charles William, educator, born in Herkimer county, New York, 9 March, 1809; died in New York city, 10 January, 1861. He was graduated at the United States military academy in 1829, and was assistant professor there till 1832. He then studied law, and subsequently theology, and was ordained as a clergyman of the Protestant Episcopal church in 1835. He was professor of mathematics in the University of New York till 1838, and afterward president of Jefferson college, Mississippi, and rector of St. Peter's church in Auburn, New York In 1843 he was appointed professor of mathematics and astronomy in Columbia college, and in 1857 was transferred to that of astronomy alone, which he held till his death. He exerted himself particularly to establish an astronomical observatory in New York city. Professor Hackley contributed to daily and weekly journals and to scientific periodicals, and published a "Treatise on Algebra" (New York, 1846); "Elementary Course in Geometry" (1847); and "Elements of Trigonometry" (1850).

--BEGIN-Pleasant Adam Hackleman

HACKLEMAN, Pleasant Adam, soldier, born in Franklin county, Indiana, 15 November, 1814; died near Corinth, Mississippi, 4 October, 1862. His father, Major John Hackleman, fought in the war of 1812. After engaging for a number of years in farming, the son studied law, and was admitted to the bar in May, 1837. He began practice in Rushville, rose rapidly to distinction in his profession, and in August, 1837, was elected judge of the probate court of Rush county, which office he held till 1841, when he was elected to the state house of representatives. After serving for several years as clerk of Rush county, he was, in 1847 and 1858, a candidate for congress, but was defeated. In 1860 he was a member of the Republican national convention at Chicago, and in 1861 of the peace conference at Washington. He entered the national service in May, 1861, as colonel of the 16th Indiana regiment, and, after the first battle of Bull Run, served under General Banks in Virginia. He was made a brigadier-general, 28 April, 1862, and in June was ordered to report to General Grant in the southwest. He took an active part in the battle of Iuka and in that of Corinth, where he was killed on the second day of the fight.