Enoch Lewis, an American mathematician, born at Radnor, Chester co., Pa., Jan. 29,1776, died in Philadelphia, July 14, 1856. He was educated in the principles and usages of the society of Friends. He early exhibited a remarkable talent for mathematics. At the age of 14 he was usher in a country school, and at 15 became principal. In the autumn of 1793 he removed to Philadelphia, and studied mathematics, teaching half of each day to earn his support. In 1795 he was employed as surveyor in a corps engaged in laying out towns in the western part of the state. From 1796 to 1799 he had charge of the mathematical school in the Friends' academy founded by William Penn in Philadelphia, and afterward was mathematical tutor at Westtown boarding school. In 1808 he opened a private school for mathematical students at New Garden, Chester co., where he taught for some years with success. He edited several mathematical works with notes, and about 1819 published a treatise on arithmetic, which was followed by one on algebra, and by a work on plane and spherical trigonometry.

In 1827 he became editor of a monthly periodical called the " African Observer." He wrote a life of William Penn, a treatise " On Oaths," one " On Baptism," a small volume reviewing Dr. Cox's "Quakerism not Christianity," and various pamphlets.. In 1847 he undertook the publication of the " Friends' Review," of which he was the editor till his death.