CALDWELL, Merritt, educator, born in Hebron, Oxford County, Maine, 29 November, 1806; died in Portland, 6 June, 1848. He was graduated at Bowdoin in 1828, and in the same year was appointed to succeed his brother Zenas as principal of the Maine Wesleyan seminary at Readfield. He was elected professor of mathematics and vice-president of Dickinson College, Pennsylvania, in 1834, and in 1837 was transferred to the chair of metaphysics and English literature, which he held for the rest of his life. The president of the College was often absent, and his duties fell on Prof. Caldwell, who performed them with great ability. He wrote much for the press, and was specially interested in the temperance reform. He visited England in 1846 as a delegate to the world's convention that formed the "evangelical alliance," and was also a delegate to the world's temperance convention from the Pennsylvania society. He published "The Doctrine of the English Verb" (1837); "Manual of Elocution" (Philadelphia, 1846); "Philosophy of Christian Perfection " (1847); and "Christianity tested by Eminent Men" (New York, 1852). A memoir of him has been published by Rev. S. M. Vail, D. D.--His elder brother, Zenas, born in Hebron, Maine, 31 March, 1800 ; died 26 December, 1826, was graduated at Bowdoin in 1824, and was the first principal of Maine Wesleyan seminary. A volume containing some of his writings, both prose and poetry, and a memoir by Rev. S. M. Vail, D. D., was published in 1855.