American educationist, born in New Preston, CT, on the 3rd of August 1773. His father, who bore the same name, was one of the most prominent Congregationalist ministers in Connecticut. He graduated with honors at Yale in 1795, then became tutor at Williams, and subsequently at Yale, where, in 1803, he became professor of mathematics and natural philosophy. In 1817 he was chosen to succeed Dr. Dwight in the presidency of the college, and in this honorable office he continued to serve until 1846, when he retired as emeritus professor. He was ordained to the Congregational ministry on the day of his inauguration. President Day was author of a work on algebra and plane trigonometry, and wrote Mensuration of Superficies and Solids; Navigation and Surveying; and An Inquiry on the Self-Determining Power of the Will, or Contingent Volition. He died in New Haven on the 22nd of August 1867.
